/* ===== 乐鱼赛场 site kit ===== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:112px}
body,h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul[class],ol[class]{list-style:none;padding:0}
img,svg,video{display:block;max-width:100%}
a{color:inherit}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
hr{border:0}

:root{
  --ink:#071C24;
  --ink-soft:#0C2A34;
  --ink-line:#1B3D48;
  --teal:#00C9A7;
  --teal-deep:#087F6F;
  --blue:#1778F2;
  --glass:#7DE8D6;
  --coral:#FF6B4A;
  --yellow:#FFD447;
  --cream:#F5F1E8;
  --cream-2:#EFE9DB;
  --rock:#69777A;
  --moss:#5F7D63;
  --clay:#B66A4C;
  --text:#16333B;
  --grad-brand:linear-gradient(105deg,var(--teal) 0%,var(--blue) 100%);
  --grad-accent:linear-gradient(100deg,var(--coral) 0%,var(--yellow) 100%);
  --font-display:"Avenir Next","Futura","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Courier New",monospace;
  --gutter:clamp(18px,4vw,40px);
  --radius:18px;
  --shadow:0 20px 44px -26px rgba(7,28,36,.6);
  --dur:.28s;
}

body{
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  color:var(--text);
  background:var(--cream);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

:where(a,button,summary,[tabindex]):focus-visible{
  outline:3px solid var(--yellow);
  outline-offset:3px;
  border-radius:6px;
}

.container{width:min(1220px,calc(100% - var(--gutter) * 2));margin-inline:auto}

/* ---------- 按钮族 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:999px;border:1px solid transparent;
  font-weight:700;font-size:15px;line-height:1.2;text-decoration:none;
  transition:transform var(--dur),box-shadow var(--dur),background-color var(--dur),color var(--dur),border-color var(--dur);
}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--grad-brand);color:var(--ink);box-shadow:0 12px 26px -16px rgba(0,201,167,.9)}
.btn-accent{background:var(--grad-accent);color:var(--ink);box-shadow:0 12px 26px -16px rgba(255,107,74,.95)}
.btn-ghost{background:transparent;border-color:rgba(245,241,232,.3);color:var(--cream)}
.btn-ghost:hover{border-color:var(--glass);color:var(--glass)}
.btn-outline{background:transparent;border-color:rgba(7,28,36,.22);color:var(--ink)}
.btn-outline:hover{border-color:var(--teal-deep);color:var(--teal-deep)}

/* ---------- 头部 ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:300;
  transform:translateY(-180%);
  background:var(--yellow);color:var(--ink);
  padding:10px 18px;border-radius:10px;
  font-weight:700;font-size:14px;text-decoration:none;
  transition:transform .2s ease;
}
.skip-link:focus-visible{transform:translateY(0)}

.frame-header{
  position:sticky;top:0;z-index:60;
  background:var(--ink);
  color:var(--cream);
  box-shadow:0 1px 0 rgba(245,241,232,.08);
}
.frame-header::before{
  content:"";position:absolute;inset:0 0 auto 0;height:2px;
  background:var(--grad-brand);z-index:2;
}

.frame-bar{background:rgba(245,241,232,.035);border-bottom:1px solid rgba(245,241,232,.08)}
.frame-bar-in{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:34px;padding-block:6px}
.frame-live{
  display:inline-flex;align-items:center;gap:9px;
  font-size:12.5px;font-weight:700;letter-spacing:.1em;color:var(--glass);
}
.live-dot{
  width:7px;height:7px;border-radius:50%;background:var(--coral);
  box-shadow:0 0 0 4px rgba(255,107,74,.18);
}
.frame-meta{
  font-family:var(--font-num);font-size:11.5px;letter-spacing:.12em;
  color:rgba(245,241,232,.55);font-variant-numeric:tabular-nums;
}

.frame-main{
  position:relative;
  display:flex;align-items:center;
  gap:clamp(14px,2.4vw,32px);
  padding-block:13px;
}

.brand{
  display:inline-flex;align-items:center;gap:12px;
  text-decoration:none;color:var(--cream);flex:0 0 auto;
}
.brand-mark{
  position:relative;width:42px;height:42px;border-radius:13px;
  background:var(--grad-brand);overflow:hidden;flex:0 0 auto;
  box-shadow:inset 0 0 0 1px rgba(245,241,232,.22);
}
.brand-mark::before,.brand-mark::after,.brand-mark > span{
  content:"";position:absolute;bottom:10px;width:6px;border-radius:3px;
  background:rgba(7,28,36,.84);
}
.brand-mark::before{left:10px;height:16px}
.brand-mark > span{left:18px;height:24px}
.brand-mark::after{left:26px;height:11px}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-name{font-family:var(--font-display);font-weight:800;font-size:19px;letter-spacing:.02em}
.brand-tag{
  font-family:var(--font-num);font-size:10px;letter-spacing:.26em;
  text-transform:uppercase;color:var(--glass);
}

.site-nav{margin-left:auto}
.nav-list{display:flex;align-items:center;gap:clamp(8px,1.7vw,22px)}
.nav-item{display:flex}
.nav-link{
  position:relative;display:inline-flex;align-items:baseline;gap:6px;
  padding:9px 2px;text-decoration:none;
  font-size:15px;font-weight:600;color:rgba(245,241,232,.76);
  transition:color var(--dur);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;border-radius:2px;
  background:var(--grad-accent);
  transform:scaleX(0);transform-origin:left center;
  transition:transform var(--dur);
}
.nav-link:hover{color:var(--cream)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--yellow)}
.nav-link[aria-current="page"]::after{transform:scaleX(1);background:var(--yellow)}
.nav-index{
  font-family:var(--font-num);font-size:10.5px;letter-spacing:.04em;
  color:var(--rock);font-variant-numeric:tabular-nums;
}
.nav-label{white-space:nowrap}

.head-cta{
  flex:0 0 auto;font-size:14px;padding:10px 18px;white-space:nowrap;
}

.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:9px 14px;border-radius:999px;
  border:1px solid rgba(245,241,232,.26);
  color:var(--cream);font-size:13.5px;font-weight:700;letter-spacing:.06em;
}
.nav-toggle:hover{border-color:var(--glass);color:var(--glass)}
.nav-toggle-box{display:grid;gap:4px;width:18px}
.nav-toggle-box span{
  display:block;height:2px;border-radius:2px;background:currentColor;
  transition:transform var(--dur),opacity var(--dur);
}
.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)}
.nav-toggle-text{white-space:nowrap}

.scroll-rail{
  position:absolute;left:0;right:0;bottom:0;height:2px;
  background:rgba(245,241,232,.09);overflow:hidden;
}
.scroll-rail-fill{
  display:block;height:100%;width:100%;
  background:var(--grad-brand);
  transform:scaleX(0);transform-origin:0 50%;
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;overflow:hidden;
  margin-top:clamp(48px,8vw,96px);
  background:
    radial-gradient(120% 90% at 88% 0%,rgba(23,120,242,.18),transparent 58%),
    radial-gradient(90% 80% at 6% 100%,rgba(0,201,167,.14),transparent 62%),
    var(--ink);
  color:rgba(245,241,232,.74);
}
.foot-wave{
  display:flex;align-items:flex-end;gap:6px;
  height:64px;padding-inline:var(--gutter);overflow:hidden;
}
.foot-wave span{
  flex:1 1 0;min-width:5px;height:22%;border-radius:4px 4px 0 0;
  background:linear-gradient(180deg,var(--teal),rgba(23,120,242,.14));
}
.foot-wave span:nth-child(2n){height:48%;background:linear-gradient(180deg,var(--glass),rgba(0,201,167,.06))}
.foot-wave span:nth-child(3n){height:76%}
.foot-wave span:nth-child(4n){height:34%;background:linear-gradient(180deg,var(--blue),rgba(0,201,167,.08))}
.foot-wave span:nth-child(5n){height:94%}
.foot-wave span:nth-child(7n){height:58%;background:linear-gradient(180deg,var(--coral),rgba(23,120,242,.1))}

.foot-top{
  display:grid;grid-template-columns:minmax(240px,1fr) minmax(0,1.9fr);
  gap:clamp(28px,5vw,72px);
  padding-block:clamp(36px,5vw,60px);
  border-top:1px solid rgba(245,241,232,.1);
}
.foot-brand{display:grid;gap:16px;align-content:start}
.foot-brand .brand{color:var(--cream)}
.foot-brand-line{
  font-family:var(--font-display);font-weight:700;
  font-size:clamp(18px,2.1vw,22px);line-height:1.5;
  color:var(--cream);max-width:24ch;
}
.foot-note{font-size:12.5px;line-height:1.75;color:rgba(245,241,232,.45);max-width:34ch}

.foot-grid{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(20px,3vw,36px);
}
.foot-col{display:grid;gap:13px;align-content:start}
.foot-title{
  font-family:var(--font-num);font-size:11.5px;font-weight:700;
  letter-spacing:.22em;text-transform:uppercase;color:var(--glass);
}
.foot-links{display:grid;gap:9px}
.foot-link{
  display:inline-flex;align-items:center;gap:9px;
  font-size:15px;color:rgba(245,241,232,.74);text-decoration:none;
  transition:color var(--dur);
}
.foot-link::before{
  content:"";width:5px;height:5px;border-radius:50%;
  background:var(--rock);transition:background var(--dur);
}
.foot-link:hover{color:var(--yellow)}
.foot-link:hover::before{background:var(--coral)}

.foot-contact{display:grid;gap:12px}
.foot-contact-row{display:grid;gap:3px}
.foot-contact-label{
  font-family:var(--font-num);font-size:11px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--rock);
}
.foot-contact-value{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:14px;line-height:1.6;color:var(--cream);word-break:break-word;
}
.copy-btn{
  padding:3px 10px;border-radius:999px;
  border:1px solid rgba(125,232,214,.42);color:var(--glass);
  font-size:11.5px;letter-spacing:.06em;
  transition:background-color var(--dur),color var(--dur),border-color var(--dur);
}
.copy-btn:hover{background:rgba(0,201,167,.16);color:var(--cream)}
.copy-btn[data-copied]{border-color:var(--yellow);color:var(--yellow)}
.copy-status{min-height:1.25em;font-size:12.5px;color:var(--glass)}

.foot-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 24px;padding-block:20px 26px;
  border-top:1px solid rgba(245,241,232,.1);
  font-size:12.5px;color:rgba(245,241,232,.5);
}
.foot-copy{font-variant-numeric:tabular-nums}
.foot-legal{
  font-family:var(--font-num);letter-spacing:.06em;
  color:rgba(245,241,232,.62);
}

/* ---------- 通用章节 ---------- */
.section{padding-block:clamp(38px,6vw,76px)}
.section-head{
  display:grid;gap:12px;max-width:64ch;
  margin-bottom:clamp(24px,3vw,40px);
}
.section-title{
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(26px,3.6vw,44px);line-height:1.14;letter-spacing:-.01em;
  color:var(--ink);
}
.section-intro{font-size:16.5px;line-height:1.7;color:var(--rock);max-width:58ch}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-num);font-size:12px;font-weight:700;
  letter-spacing:.24em;text-transform:uppercase;color:var(--moss);
}
.eyebrow::before{
  content:"";width:26px;height:2px;border-radius:2px;background:var(--grad-brand);
}
.eyebrow--light{color:var(--glass)}

.lede{font-size:clamp(17px,1.9vw,20px);line-height:1.72;color:var(--text);max-width:60ch}

.rule{
  height:1px;margin-block:clamp(28px,4vw,48px);
  background:linear-gradient(90deg,rgba(105,119,122,.45),rgba(105,119,122,0));
}

.grid{
  display:grid;grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2vw,28px);
}
.span-3{grid-column:span 3}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-6{grid-column:span 6}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}
.span-9{grid-column:span 9}
.span-12{grid-column:span 12}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding-block:18px 0;font-size:12.5px}
.breadcrumb-list{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-num);letter-spacing:.04em;color:var(--rock);
}
.breadcrumb-item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb-item + .breadcrumb-item::before{content:"/";color:rgba(105,119,122,.65)}
.breadcrumb-link{color:var(--rock);text-decoration:none;transition:color var(--dur)}
.breadcrumb-link:hover{color:var(--blue)}

/* ---------- 正文 ---------- */
.prose{max-width:68ch;font-size:17px;line-height:1.85;color:var(--text)}
.prose > * + *{margin-top:1.1em}
.prose h2{
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(22px,2.6vw,30px);line-height:1.24;
  margin-top:2em;color:var(--ink);
}
.prose h3{font-size:19px;font-weight:700;line-height:1.4;margin-top:1.6em;color:var(--ink)}
.prose ul{display:grid;gap:10px}
.prose ul li{position:relative;padding-left:22px}
.prose ul li::before{
  content:"";position:absolute;left:0;top:.72em;
  width:8px;height:8px;border-radius:2px;background:var(--grad-brand);
}
.prose a{color:var(--blue);text-underline-offset:3px}
.prose strong{color:var(--ink);font-weight:700}

/* ---------- 面板与数据 ---------- */
.panel{
  position:relative;overflow:hidden;
  background:var(--ink);color:rgba(245,241,232,.78);
  border-radius:var(--radius);padding:clamp(20px,3vw,32px);
  box-shadow:var(--shadow);
}
.panel--tint{background:var(--cream-2);color:var(--text);box-shadow:none}

.stat{display:grid;gap:6px}
.stat-value{
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(34px,5vw,56px);line-height:1;
  letter-spacing:-.02em;font-variant-numeric:tabular-nums;
  color:var(--cream);
}
.panel--tint .stat-value{color:var(--ink)}
.stat-label{
  font-family:var(--font-num);font-size:11.5px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--glass);
}
.panel--tint .stat-label{color:var(--rock)}

/* ---------- 标签 ---------- */
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  font-size:12.5px;font-weight:700;letter-spacing:.03em;
  background:rgba(0,201,167,.12);color:var(--teal-deep);
  border:1px solid rgba(0,201,167,.32);
}
.chip--coral{background:rgba(255,107,74,.13);color:#C8422A;border-color:rgba(255,107,74,.34)}
.chip--yellow{background:rgba(255,212,71,.22);color:#8A6A00;border-color:rgba(255,212,71,.55)}
.chip--moss{background:rgba(95,125,99,.15);color:var(--moss);border-color:rgba(95,125,99,.32)}

.tag{
  display:inline-block;
  font-family:var(--font-num);font-size:11.5px;letter-spacing:.16em;
  text-transform:uppercase;padding:3px 9px;border-radius:7px;
  background:rgba(95,125,99,.16);color:var(--moss);
}
.tag--clay{background:rgba(182,106,76,.16);color:var(--clay)}

/* ---------- 旁注 ---------- */
.note{
  border-left:3px solid var(--moss);
  padding:4px 0 4px 16px;
  font-size:14.5px;line-height:1.75;color:var(--rock);
}
.note--clay{border-left-color:var(--clay);color:var(--clay)}

/* ---------- 图片容器 ---------- */
.media-frame{
  position:relative;isolation:isolate;overflow:hidden;
  border-radius:var(--radius);
  aspect-ratio:16/10;
  background:linear-gradient(140deg,var(--ink-soft) 0%,var(--ink) 58%,#0F3542 100%);
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(120% 90% at 84% 8%,rgba(0,201,167,.34),transparent 60%),
    radial-gradient(95% 75% at 8% 96%,rgba(23,120,242,.32),transparent 66%),
    repeating-linear-gradient(115deg,rgba(245,241,232,.055) 0 2px,transparent 2px 22px);
  mix-blend-mode:screen;
}
.media-frame img,.media-frame video{
  width:100%;height:100%;object-fit:cover;display:block;
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-placeholder{
  position:absolute;inset:0;display:grid;place-items:center;
  font-family:var(--font-num);font-size:11.5px;letter-spacing:.24em;
  text-transform:uppercase;color:rgba(245,241,232,.55);
  background:
    radial-gradient(70% 60% at 50% 55%,rgba(125,232,214,.16),transparent 70%);
}
.media-caption{margin-top:10px;font-size:12.5px;line-height:1.65;color:var(--rock)}

/* ---------- 目录 ---------- */
.toc{display:grid;gap:14px}
.toc-title{
  font-family:var(--font-num);font-size:11.5px;font-weight:700;
  letter-spacing:.22em;text-transform:uppercase;color:var(--rock);
}
.toc-list{display:grid;gap:2px;border-left:1px solid rgba(105,119,122,.3)}
.toc-link{
  display:flex;align-items:baseline;gap:10px;
  margin-left:-1px;padding:8px 0 8px 14px;
  border-left:2px solid transparent;
  font-size:14px;line-height:1.45;color:var(--rock);text-decoration:none;
  transition:color var(--dur),border-color var(--dur);
}
.toc-link:hover{color:var(--blue)}
.toc-link.is-active{
  color:var(--ink);font-weight:700;border-left-color:var(--teal);
}

/* ---------- 返回顶部 ---------- */
.backtop{
  position:fixed;right:clamp(16px,3vw,32px);bottom:clamp(16px,3vw,32px);z-index:70;
  width:48px;height:48px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--ink);color:var(--cream);
  font-size:18px;line-height:1;
  border:1px solid rgba(125,232,214,.4);
  box-shadow:0 16px 32px -18px rgba(7,28,36,.9);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity var(--dur),transform var(--dur),visibility var(--dur),background-color var(--dur);
}
.backtop.is-visible{opacity:1;visibility:visible;transform:none}
.backtop:hover{background:var(--ink-soft);color:var(--glass)}

/* ---------- 渐显 ---------- */
.js [data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
.js [data-reveal].is-in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .nav-index{display:none}
  .nav-list{gap:12px}
  .head-cta{font-size:13px;padding:9px 14px}
  .brand-name{font-size:17px}
}

@media (max-width:900px){
  html{scroll-padding-top:88px}
  .frame-main{flex-wrap:nowrap;padding-block:11px}
  .nav-toggle{display:inline-flex;order:3}
  .head-cta{order:2;margin-left:auto}
  .site-nav{
    position:absolute;left:0;right:0;top:calc(100% + 1px);
    margin-left:0;
    background:var(--ink-soft);
    border:1px solid rgba(245,241,232,.1);
    border-radius:0 0 var(--radius) var(--radius);
    padding:8px 18px 18px;
    box-shadow:0 34px 54px -32px rgba(0,0,0,.92);
    opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity var(--dur),transform var(--dur),visibility var(--dur);
  }
  .site-nav[data-open]{
    opacity:1;visibility:visible;transform:none;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-item{display:block}
  .nav-item + .nav-item{border-top:1px solid rgba(245,241,232,.08)}
  .nav-link{
    width:100%;justify-content:space-between;
    padding:14px 4px;font-size:16px;
  }
  .nav-link::after{display:none}
  .nav-link[aria-current="page"]{color:var(--yellow)}
  .nav-index{display:block;order:2;font-size:11.5px}

  .foot-top{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .foot-brand-line{max-width:30ch}
}

@media (max-width:720px){
  .span-3,.span-4,.span-5,.span-6,.span-7,.span-8,.span-9{grid-column:span 12}
  .foot-grid{grid-template-columns:1fr}
  .foot-wave{height:48px;gap:5px}
}

@media (max-width:560px){
  body{font-size:16px}
  .frame-meta{display:none}
  .head-cta{display:none}
  .nav-toggle{margin-left:auto}
  .brand-tag{display:none}
  .brand-name{font-size:17px}
  .brand-mark{width:38px;height:38px;border-radius:12px}
  .foot-bottom{flex-direction:column;align-items:flex-start}
  .backtop{width:44px;height:44px}
}

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