/* ============================================================
   乐鱼赛场 · 共享样式表 /assets/site.css
   深墨蓝数据底色 + 水感青蓝折光 + 珊瑚橙行动 + 荧光黄点状重音
   ============================================================ */

/* ---------- 1. 设计变量 ---------- */
:root{
  --ink-900:#05121F;
  --ink-700:#0C2438;
  --ink-500:#1C4159;
  --aqua-500:#16C1D6;
  --aqua-300:#7EE6F0;
  --coral-500:#FF6B4A;
  --lime-400:#D8F34A;
  --paper-100:#F6EFE3;
  --paper-300:#E4D8C6;
  --read-dark:#EAF6FA;
  --read-paper:#10202E;

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

  --radius-xl:36px;
  --radius-lg:26px;
  --radius-md:18px;
  --radius-pill:999px;

  --wrap:1240px;
  --edge:clamp(18px,4vw,56px);
  --line:rgba(126,230,240,.18);
  --line-soft:rgba(126,230,240,.10);
  --glow-dock:0 22px 46px -26px rgba(0,0,0,.92);
  --panel:linear-gradient(150deg,rgba(12,36,56,.92),rgba(5,18,31,.94));
}

/* ---------- 2. Reset 与基础 ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--read-dark);
  font-family:var(--font-sans);
  font-size:17px;
  font-weight:350;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
main{display:block;padding-top:clamp(104px,12vw,150px);}
img,svg,video{display:block;max-width:100%;}
h1,h2,h3,h4{margin:0;font-weight:250;line-height:1.14;letter-spacing:-.01em;}
p{margin:0 0 1em;}
ul,ol{margin:0 0 1em;padding-left:1.1em;}
button{font:inherit;color:inherit;}
a{color:var(--aqua-300);}
::selection{background:var(--aqua-500);color:var(--ink-900);}

:focus-visible{
  outline:2px solid var(--lime-400);
  outline-offset:3px;
  border-radius:4px;
}

/* ---------- 3. 排版工具 ---------- */
.wrap{
  width:min(var(--wrap),calc(100% - var(--edge) * 2));
  margin-inline:auto;
}
.display-title{
  font-size:clamp(38px,7.2vw,96px);
  font-weight:200;
  letter-spacing:-.025em;
  line-height:1.02;
}
.display-title .accent{color:var(--aqua-300);}
.section-title{
  font-size:clamp(26px,3.4vw,46px);
  font-weight:250;
  letter-spacing:-.015em;
  margin-bottom:.5em;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--aqua-300);
  margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor;opacity:.75;}
.num,.data-figure{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
}
.data-figure{
  font-weight:800;
  font-size:clamp(40px,6.2vw,92px);
  line-height:1;
  letter-spacing:-.03em;
  color:var(--lime-400);
}
.prose p{max-width:38em;}
.muted{color:rgba(234,246,250,.62);}
.text-link{
  color:var(--aqua-300);
  text-decoration:none;
  border-bottom:1px solid rgba(126,230,240,.45);
  transition:color .2s,border-color .2s;
}
.text-link:hover{color:var(--lime-400);border-color:rgba(216,243,74,.6);}

/* ---------- 4. 布局网格 ---------- */
.grid{display:grid;gap:clamp(16px,2.2vw,28px);}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid--7-3{grid-template-columns:minmax(0,7fr) minmax(0,3fr);}
.grid--8-2{grid-template-columns:minmax(0,8fr) minmax(0,2fr);}
.rule-grid{position:relative;isolation:isolate;}
.rule-grid::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background-image:
    linear-gradient(90deg,rgba(126,230,240,.07) 1px,transparent 1px),
    linear-gradient(180deg,rgba(126,230,240,.07) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:linear-gradient(180deg,#000,transparent 88%);
  mask-image:linear-gradient(180deg,#000,transparent 88%);
  pointer-events:none;
}
.paper-band{
  background:var(--paper-100);
  color:var(--read-paper);
  border:1px solid var(--paper-300);
  border-radius:var(--radius-xl);
  padding:clamp(28px,5vw,68px);
}
.paper-band .eyebrow{color:#0B6E7C;}
.paper-band a{color:#0B5A66;}
.paper-band .section-title{color:var(--read-paper);}

/* ---------- 5. 通用组件 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:9px;
  padding:14px 26px;
  border:1px solid transparent;
  border-radius:var(--radius-pill);
  font-size:15px;font-weight:500;letter-spacing:.05em;
  text-decoration:none;
  transition:transform .2s,background .25s,border-color .25s,color .25s,box-shadow .25s;
}
.btn--primary{background:var(--coral-500);color:#220D07;}
.btn--primary:hover{background:#FF8869;transform:translateY(-2px);box-shadow:0 16px 30px -18px var(--coral-500);}
.btn--ghost{border-color:rgba(126,230,240,.42);color:var(--read-dark);}
.btn--ghost:hover{border-color:var(--aqua-300);background:rgba(22,193,214,.12);}
.btn--paper{background:var(--read-paper);color:var(--paper-100);}
.btn--paper:hover{background:#16303F;transform:translateY(-2px);}

.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:9px;
  list-style:none;margin:0 0 24px;padding:0;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;
  color:rgba(234,246,250,.55);
}
.breadcrumb li{display:inline-flex;align-items:center;gap:9px;}
.breadcrumb li + li::before{content:"/";color:var(--aqua-500);}
.breadcrumb a{color:rgba(234,246,250,.8);text-decoration:none;}
.breadcrumb a:hover{color:var(--lime-400);}

.surface-card{
  position:relative;
  padding:clamp(18px,2.2vw,30px);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  background:var(--panel);
  transition:border-color .25s,transform .25s;
}
.surface-card:hover{border-color:rgba(22,193,214,.5);}
.surface-card--paper{
  background:var(--paper-100);
  color:var(--read-paper);
  border-color:var(--paper-300);
}
.surface-card--paper a{color:#0B5A66;}

.index-list{list-style:none;margin:0;padding:0;border-top:1px solid var(--line);}
.index-item{border-bottom:1px solid var(--line);}
.index-link{
  display:flex;align-items:baseline;gap:14px;
  padding:16px 4px;
  color:var(--read-dark);text-decoration:none;
  transition:color .2s,padding-left .22s;
}
.index-link:hover{color:var(--coral-500);padding-left:12px;}
.index-num{flex:0 0 auto;font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--aqua-500);}
.index-text{flex:1 1 auto;}
.index-meta{flex:0 0 auto;font-family:var(--font-mono);font-size:12px;color:rgba(234,246,250,.55);}

.stat-tile{
  padding:clamp(16px,2vw,22px);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  background:rgba(12,36,56,.7);
}
.stat-label{
  display:block;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--aqua-300);margin-bottom:8px;
}
.stat-value{
  display:block;
  font-family:var(--font-mono);font-weight:800;
  font-size:clamp(28px,4vw,50px);line-height:1.08;
  color:var(--lime-400);letter-spacing:-.02em;
}
.stat-note{display:block;margin-top:6px;font-size:13.5px;color:rgba(234,246,250,.66);}

.timeline{
  display:flex;gap:18px;
  list-style:none;margin:0;padding:0 2px 10px;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  -webkit-overflow-scrolling:touch;
}
.timeline-item{
  position:relative;
  flex:0 0 min(286px,78%);
  scroll-snap-align:start;
  padding:22px 20px 22px 24px;
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  background:rgba(12,36,56,.72);
}
.timeline-item::before{
  content:"";position:absolute;left:0;top:24px;
  width:8px;height:8px;border-radius:50%;
  background:var(--lime-400);
  box-shadow:0 0 0 4px rgba(216,243,74,.16);
}
.timeline-time{display:block;font-family:var(--font-mono);font-size:13px;letter-spacing:.08em;color:var(--lime-400);}
.timeline::-webkit-scrollbar{height:6px;}
.timeline::-webkit-scrollbar-track{background:rgba(126,230,240,.08);border-radius:999px;}
.timeline::-webkit-scrollbar-thumb{background:var(--ink-500);border-radius:999px;}

.legend{display:flex;flex-wrap:wrap;gap:10px;list-style:none;margin:0;padding:0;}
.legend-item{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  font-size:12.5px;letter-spacing:.06em;
  color:rgba(234,246,250,.82);
}
.legend-dot{width:8px;height:8px;border-radius:50%;background:var(--aqua-500);flex:0 0 auto;}
.legend-dot--coral{background:var(--coral-500);}
.legend-dot--lime{background:var(--lime-400);}

.img-frame{
  position:relative;overflow:hidden;
  aspect-ratio:16/9;
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  background:linear-gradient(145deg,var(--ink-700),var(--ink-900));
}
.img-frame--wide{aspect-ratio:21/9;}
.img-frame--tall{aspect-ratio:3/4;}
.img-frame--square{aspect-ratio:1/1;}
.img-frame img{width:100%;height:100%;object-fit:cover;}
.img-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(5,18,31,0) 42%,rgba(5,18,31,.58));
}
.img-placeholder{
  display:grid;place-items:center;
  width:100%;height:100%;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--aqua-300);
  background:
    radial-gradient(70% 60% at 25% 20%,rgba(22,193,214,.22),transparent 70%),
    linear-gradient(145deg,rgba(12,36,56,.9),rgba(5,18,31,.95));
}

/* ---------- 6. 头部：双浮岛胶囊 ---------- */
.skip-link{
  position:fixed;top:14px;left:var(--edge);z-index:200;
  padding:10px 18px;
  border-radius:var(--radius-pill);
  background:var(--lime-400);color:var(--read-paper);
  font-size:13px;font-weight:600;letter-spacing:.08em;text-decoration:none;
  transform:translateY(-190%);
  transition:transform .22s ease;
}
.skip-link:focus-visible,.skip-link:focus{transform:translateY(0);outline:none;}

.site-header{position:relative;z-index:60;}

.header-inner{
  position:fixed;inset:0 0 auto 0;z-index:70;
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:clamp(12px,1.7vw,22px) var(--edge);
  pointer-events:none;
  transition:padding .3s ease;
}
.header-inner > *{pointer-events:auto;}

.brand{
  display:inline-flex;align-items:center;gap:12px;
  padding:10px 22px 10px 12px;
  border:1px solid rgba(126,230,240,.22);
  border-radius:var(--radius-pill);
  background:linear-gradient(120deg,rgba(12,36,56,.94),rgba(5,18,31,.8));
  color:var(--read-dark);text-decoration:none;
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  box-shadow:var(--glow-dock);
  transition:padding .3s ease,border-color .25s;
}
.brand:hover{border-color:rgba(22,193,214,.55);}
.brand-mark{
  position:relative;flex:0 0 auto;
  width:34px;height:34px;border-radius:50%;
  background:radial-gradient(circle at 32% 28%,var(--aqua-300),var(--aqua-500) 46%,var(--ink-700) 100%);
  box-shadow:0 0 0 1px rgba(126,230,240,.35),0 8px 20px -10px var(--aqua-500);
  transition:width .3s ease,height .3s ease;
}
.brand-mark::after{
  content:"";position:absolute;left:7px;right:7px;bottom:9px;height:2px;
  border-radius:2px;background:var(--lime-400);opacity:.9;
}
.brand-copy{display:flex;flex-direction:column;line-height:1.16;}
.brand-word{font-size:17px;font-weight:600;letter-spacing:.06em;}
.brand-tagline{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.2em;
  color:var(--aqua-300);opacity:.85;white-space:nowrap;
}

.nav-dock{
  display:flex;align-items:center;gap:6px;
  padding:8px;
  border:1px solid rgba(126,230,240,.2);
  border-radius:var(--radius-pill);
  background:linear-gradient(120deg,rgba(12,36,56,.94),rgba(5,18,31,.82));
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  box-shadow:var(--glow-dock);
  transition:padding .3s ease;
}
.nav-list{display:flex;align-items:center;gap:2px;margin:0;padding:0;list-style:none;}
.nav-link{
  display:inline-block;
  padding:9px 15px;
  border-radius:var(--radius-pill);
  color:rgba(234,246,250,.78);
  font-size:14px;letter-spacing:.03em;text-decoration:none;white-space:nowrap;
  transition:background .25s,color .25s;
}
.nav-link:hover{color:var(--read-dark);background:rgba(22,193,214,.16);}
.nav-link[aria-current="page"]{background:var(--aqua-300);color:var(--read-paper);}
.nav-cta{
  display:inline-flex;align-items:center;
  margin-left:6px;padding:10px 19px;
  border-radius:var(--radius-pill);
  background:var(--coral-500);color:#220D07;
  font-size:13.5px;font-weight:600;letter-spacing:.07em;text-decoration:none;white-space:nowrap;
  transition:background .25s,transform .2s,box-shadow .25s;
}
.nav-cta:hover{background:#FF8869;transform:translateY(-1px);box-shadow:0 14px 26px -16px var(--coral-500);}

.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:12px 18px;
  border:1px solid rgba(126,230,240,.24);
  border-radius:var(--radius-pill);
  background:linear-gradient(120deg,rgba(12,36,56,.95),rgba(5,18,31,.84));
  color:var(--read-dark);
  font-size:12.5px;letter-spacing:.14em;
  cursor:pointer;
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  box-shadow:var(--glow-dock);
}
.nav-toggle-bars{position:relative;width:18px;height:10px;flex:0 0 auto;}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";position:absolute;left:0;right:0;height:2px;border-radius:2px;
  background:var(--aqua-300);
  transition:transform .26s ease,top .26s ease,background .26s;
}
.nav-toggle-bars::before{top:0;}
.nav-toggle-bars::after{top:8px;}
.nav-toggle-label{font-family:var(--font-mono);}
.site-header[data-open] .nav-toggle-bars::before{top:4px;transform:rotate(45deg);background:var(--lime-400);}
.site-header[data-open] .nav-toggle-bars::after{top:4px;transform:rotate(-45deg);background:var(--lime-400);}

.rail{
  position:fixed;top:0;left:0;right:0;height:3px;z-index:90;
  background:rgba(28,65,89,.5);
  pointer-events:none;
}
.rail-bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--aqua-500),var(--aqua-300) 55%,var(--lime-400));
  box-shadow:0 0 14px rgba(216,243,74,.4);
  transition:width .12s linear;
}

/* 滚动后收缩为窄索引条 */
.site-header[data-scrolled="true"] .header-inner{padding-top:8px;padding-bottom:8px;}
.site-header[data-scrolled="true"] .brand{padding:6px 18px 6px 8px;}
.site-header[data-scrolled="true"] .brand-mark{width:26px;height:26px;}
.site-header[data-scrolled="true"] .brand-tagline{display:none;}
.site-header[data-scrolled="true"] .nav-dock{padding:5px;}
.site-header[data-scrolled="true"] .nav-link{padding:6px 12px;font-size:13px;}
.site-header[data-scrolled="true"] .nav-cta{padding:7px 14px;font-size:12.5px;}

/* ---------- 7. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(72px,10vw,140px);
  padding:clamp(52px,7vw,92px) 0 30px;
  border-top:1px solid var(--line);
  background:
    radial-gradient(70% 80% at 12% 0%,rgba(22,193,214,.16),transparent 62%),
    linear-gradient(180deg,var(--ink-900) 0%,var(--ink-700) 55%,#04101B 100%);
  color:var(--read-dark);
  overflow:hidden;
}
.site-footer::before{
  content:"";position:absolute;right:-6%;bottom:-34%;width:60%;height:70%;
  background:radial-gradient(closest-side,rgba(255,107,74,.16),transparent 72%);
  pointer-events:none;
}
.footer-grid{
  position:relative;
  display:grid;
  grid-template-columns:1.35fr 1fr 1.15fr 1fr;
  gap:clamp(26px,3.4vw,56px);
}
.footer-brand{display:block;}
.footer-mark{
  display:block;width:44px;height:44px;border-radius:50%;
  background:radial-gradient(circle at 32% 28%,var(--aqua-300),var(--aqua-500) 46%,var(--ink-700) 100%);
  box-shadow:0 0 0 1px rgba(126,230,240,.35),0 10px 26px -12px var(--aqua-500);
  margin-bottom:16px;
}
.footer-name{
  margin:0 0 10px;
  font-size:22px;font-weight:400;letter-spacing:.05em;color:var(--read-dark);
}
.footer-pitch{
  margin:0 0 16px;
  max-width:26em;
  font-size:14.5px;line-height:1.8;
  color:rgba(234,246,250,.7);
}
.footer-icp{
  margin:0;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  color:var(--lime-400);
}
.footer-title{
  margin-bottom:16px;
  font-family:var(--font-mono);font-size:12px;font-weight:500;
  letter-spacing:.18em;text-transform:uppercase;
  color:var(--aqua-300);
}
.footer-list{list-style:none;margin:0 0 16px;padding:0;display:grid;gap:9px;}
.footer-link{
  display:inline-block;
  padding:2px 0;
  font-size:14.5px;
  color:rgba(234,246,250,.78);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .2s,border-color .2s;
}
.footer-link:hover{color:var(--lime-400);border-color:rgba(216,243,74,.5);}
.footer-contact{
  display:grid;gap:11px;
  font-style:normal;
  font-size:14.5px;
  color:rgba(234,246,250,.78);
}
.footer-contact-item{display:flex;gap:11px;align-items:baseline;}
.footer-contact-key{
  flex:0 0 auto;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--aqua-500);
}
.footer-contact-value{
  font-family:var(--font-mono);font-size:13.5px;letter-spacing:.02em;
  color:var(--read-dark);word-break:break-all;
}
.footer-contact-value--text{font-family:var(--font-sans);font-size:14px;word-break:normal;}
.footer-batch{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:8px;}
.footer-batch li{
  padding:5px 12px;
  border:1px solid rgba(216,243,74,.35);
  border-radius:var(--radius-pill);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
  color:var(--lime-400);
}
.footer-base{
  position:relative;
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px 26px;
  margin-top:clamp(34px,5vw,60px);
  padding-top:20px;
  border-top:1px solid var(--line-soft);
  font-size:12.5px;letter-spacing:.04em;
  color:rgba(234,246,250,.5);
}
.footer-base p{margin:0;}

/* ---------- 8. 动效 ---------- */
.js .reveal{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .42s ease,transform .42s cubic-bezier(.2,.72,.3,1);
  will-change:opacity,transform;
}
.js .reveal.is-in{opacity:1;transform:none;}

/* ---------- 9. 响应式 ---------- */
@media (max-width:1024px){
  .grid--7-3,.grid--8-2{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:980px){
  main{padding-top:clamp(92px,16vw,124px);}

  .nav-toggle{display:inline-flex;}
  .nav-dock{
    position:fixed;
    left:12px;right:12px;bottom:14px;
    flex-direction:column;align-items:stretch;
    padding:16px;
    padding-bottom:calc(16px + env(safe-area-inset-bottom,0px));
    border-radius:30px;
    max-height:min(72vh,540px);
    overflow-y:auto;
    opacity:0;visibility:hidden;
    transform:translateY(16px);
    transition:opacity .28s ease,transform .28s ease,visibility .28s;
  }
  .site-header[data-open] .nav-dock{opacity:1;visibility:visible;transform:translateY(0);}
  .site-header[data-scrolled="true"] .nav-dock{padding:16px;}

  .nav-list{
    flex-direction:column;align-items:stretch;gap:0;
    width:100%;
    counter-reset:navidx;
  }
  .nav-list > li{counter-increment:navidx;}
  .nav-list > li + li{border-top:1px solid var(--line-soft);}
  .nav-link{
    display:flex;align-items:center;
    padding:13px 6px;
    border-radius:0;
    font-size:15.5px;
  }
  .nav-link::before{
    content:"0" counter(navidx);
    margin-right:12px;
    font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
    color:var(--aqua-500);
  }
  .nav-link[aria-current="page"]{background:rgba(126,230,240,.14);color:var(--aqua-300);border-radius:8px;padding-left:12px;}
  .nav-cta{
    justify-content:center;
    margin:16px 0 0;
    padding:15px 20px;
    font-size:14.5px;
  }
}
@media (max-width:760px){
  .grid--2,.grid--3{grid-template-columns:1fr;}
  .brand-tagline{display:none;}
}
@media (max-width:620px){
  .footer-grid{grid-template-columns:1fr;gap:34px;}
  .footer-base{flex-direction:column;}
  .timeline-item{flex:0 0 84%;}
}

/* ---------- 10. 无障碍与低动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .js .reveal{opacity:1;transform:none;}
  .rail-bar{transition:none;}
}