/* =========================================================
   捕鱼吧上下分 · /assets/site.css
   01 tokens · 02 reset · 03 排版 · 04 工具 · 05 按钮
   06 头部 · 07 页脚 · 08 版式组件 · 09 显现与动效 · 10 响应式
   ========================================================= */

/* ===== 01 tokens ===== */
:root{
  --deep:#04101F;
  --hull:#0A2136;
  --mid:#123A5A;
  --cyan:#1FE0D0;
  --cyan-soft:#7BF5EA;
  --coral:#FF7A45;
  --violet:#A855F7;
  --amber:#FFC53D;
  --ice:#EAF6FF;
  --mist:#8CA6BF;
  --line:rgba(31,224,208,.18);
  --line-soft:rgba(140,166,191,.24);
  --font-display:"Source Han Serif SC","Noto Serif SC","Songti SC",serif;
  --font-body:Inter,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-num:"Barlow Condensed","DIN Alternate","Roboto Mono",monospace;
  --shell:1240px;
  --shell-wide:1460px;
  --r-lg:30px;
  --r-md:18px;
  --r-pill:999px;
  --header-h:78px;
  --shadow-lift:0 20px 46px rgba(0,0,0,.5);
  --ease:cubic-bezier(.22,.68,.32,1);
}

/* ===== 02 reset ===== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
html:focus-within{scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  background-color:var(--deep);
  color:var(--ice);
  font-family:var(--font-body);
  font-size:17px;
  font-weight:400;
  line-height:1.75;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:
    radial-gradient(62% 46% at 12% 2%, rgba(31,224,208,.16), transparent 70%),
    radial-gradient(52% 42% at 88% 10%, rgba(168,85,247,.15), transparent 72%),
    radial-gradient(78% 52% at 50% 104%, rgba(255,122,69,.12), transparent 72%),
    linear-gradient(180deg,#04101F 0%,#061a2c 42%,#04101F 100%);
}
body::after{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background-image:
    repeating-linear-gradient(115deg, rgba(31,224,208,.055) 0 1px, transparent 1px 86px),
    repeating-linear-gradient(65deg, rgba(168,85,247,.05) 0 1px, transparent 1px 86px);
}
body.has-nav-open{overflow:hidden}
img,svg,video{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0}
:focus-visible{outline:2px solid var(--cyan-soft);outline-offset:3px;border-radius:8px}
::selection{background:var(--cyan);color:var(--deep)}
#main-content{scroll-margin-top:calc(var(--header-h) + 16px)}

/* ===== 03 排版 ===== */
h1,h2,h3,h4,h5{margin:0 0 .6em;font-family:var(--font-display);font-weight:800;line-height:1.18;letter-spacing:.01em;color:var(--ice)}
h4,h5{font-weight:700;font-size:1.05rem}
p{margin:0 0 1.2em}
a{color:var(--cyan);text-decoration:none;transition:color .25s var(--ease)}
a:hover{color:var(--cyan-soft)}
ul,ol{margin:0;padding:0;list-style:none}
strong{font-weight:600}
.display-title{
  position:relative;
  font-size:clamp(2.2rem,5vw,4.2rem);
  font-weight:900;
  line-height:1.08;
  letter-spacing:.01em;
  text-wrap:balance;
}
.display-title::after{
  content:"";display:block;
  width:clamp(64px,14vw,148px);height:10px;
  margin-top:20px;border-radius:var(--r-pill);
  background:linear-gradient(90deg,var(--cyan),var(--violet) 65%,transparent);
  transform:skewX(-18deg);
}
.section-title{font-size:clamp(1.5rem,3vw,2.4rem);font-weight:800;text-wrap:balance}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  margin:0 0 16px;
  font-family:var(--font-body);font-size:.78rem;font-weight:600;
  letter-spacing:.2em;text-transform:uppercase;color:var(--cyan);
}
.eyebrow::before{
  content:"";width:30px;height:2px;
  background:linear-gradient(90deg,var(--cyan),rgba(31,224,208,0));
}
.lede{font-size:clamp(1.02rem,1.4vw,1.18rem);color:rgba(234,246,255,.88);max-width:62ch}
.note{color:var(--mist);font-size:.9rem;line-height:1.7}
.stat{display:inline-flex;flex-direction:column;gap:4px}
.stat-num{
  font-family:var(--font-num);font-weight:600;
  font-size:clamp(1.8rem,3.6vw,2.8rem);
  line-height:1;letter-spacing:.14em;color:var(--cyan);
}
.stat-label{font-size:.78rem;letter-spacing:.14em;color:var(--mist)}

/* ===== 04 工具 ===== */
.visually-hidden{
  position:absolute!important;width:1px;height:1px;margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0;
}
.container{width:calc(100% - 40px);max-width:var(--shell);margin-inline:auto}
.container--wide{width:calc(100% - 40px);max-width:var(--shell-wide);margin-inline:auto}
.skip-link{
  position:absolute;left:16px;top:-72px;z-index:120;
  padding:12px 22px;border-radius:0 0 20px 20px;
  background:var(--cyan);color:var(--deep);font-weight:600;
  transition:top .25s var(--ease);
}
.skip-link:focus{top:0;color:var(--deep)}

/* ===== 05 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  padding:.72em 1.35em;border-radius:var(--r-pill);
  border:1px solid transparent;
  font-size:.94rem;font-weight:600;letter-spacing:.02em;
  white-space:nowrap;cursor:pointer;
  transition:transform .25s var(--ease),background-color .25s var(--ease),color .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{
  background-image:linear-gradient(118deg,var(--coral),#ff9f74);
  color:var(--deep);
  box-shadow:0 12px 28px rgba(255,122,69,.32);
}
.btn-primary:hover{color:var(--deep);box-shadow:0 16px 34px rgba(255,122,69,.44)}
.btn-ghost{
  background-color:rgba(31,224,208,.08);
  border-color:rgba(31,224,208,.45);
  color:var(--cyan);
}
.btn-ghost:hover{background-color:var(--cyan);color:var(--deep);border-color:var(--cyan)}

/* ===== 06 头部 ===== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:90;
  color:var(--ice);
  background-color:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease);
}
.site-header::before{
  content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background:linear-gradient(180deg,rgba(4,16,31,.92),rgba(4,16,31,.5) 58%,rgba(4,16,31,0));
  transition:opacity .35s var(--ease);
}
.site-header[data-scrolled],
.site-header[data-open]{
  background-color:rgba(4,16,31,.95);
  border-bottom-color:var(--line);
  box-shadow:var(--shadow-lift);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
}
.site-header[data-scrolled]::before,
.site-header[data-open]::before{opacity:0}
.header-shell{
  display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;
  gap:clamp(12px,2vw,28px);
  width:calc(100% - 32px);max-width:var(--shell-wide);margin-inline:auto;
  min-height:var(--header-h);padding:10px 0;
}
.brand{display:inline-flex;align-items:center;gap:12px;color:var(--ice)}
.brand:hover{color:var(--ice)}
.brand-mark{
  position:relative;flex:none;width:44px;height:44px;border-radius:50%;
  border:1px solid rgba(31,224,208,.5);
  background:radial-gradient(circle at 30% 24%,rgba(31,224,208,.38),rgba(4,16,31,.92) 72%);
}
.brand-ring{
  position:absolute;inset:6px;border-radius:50%;
  border:1.5px dashed var(--cyan);opacity:.9;
  animation:brandOrbit 16s linear infinite;
}
.brand-ring--inner{inset:13px;border-style:solid;border-color:rgba(255,122,69,.85);opacity:.75;animation-duration:10s;animation-direction:reverse}
.brand-core{
  position:absolute;left:50%;top:50%;width:8px;height:8px;margin:-4px 0 0 -4px;
  border-radius:50%;background:var(--cyan);box-shadow:0 0 12px var(--cyan);
}
@keyframes brandOrbit{to{transform:rotate(360deg)}}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-name{font-family:var(--font-display);font-size:1.16rem;font-weight:800;letter-spacing:.04em}
.brand-tagline{font-size:.72rem;letter-spacing:.08em;color:var(--mist)}
.site-nav{justify-self:center;min-width:0}
.nav-list{display:flex;align-items:center;gap:clamp(2px,.6vw,10px)}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  padding:9px 13px;border-radius:var(--r-pill);
  font-size:.92rem;font-weight:500;letter-spacing:.02em;
  color:rgba(234,246,255,.84);
  transition:color .25s var(--ease),background-color .25s var(--ease);
}
.nav-link:hover{color:var(--cyan-soft);background-color:rgba(31,224,208,.1)}
.nav-link[aria-current="page"]{color:var(--cyan)}
.nav-link[aria-current="page"]::after{
  content:"";position:absolute;left:13px;right:13px;bottom:3px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),var(--violet));
}
.header-actions{display:flex;align-items:center;gap:10px;justify-self:end}
.nav-toggle{
  display:none;position:relative;flex:none;
  width:46px;height:46px;border-radius:50%;cursor:pointer;
  border:1px solid rgba(31,224,208,.45);
  background-color:rgba(31,224,208,.1);
}
.nav-toggle-bar{
  position:absolute;left:50%;width:18px;height:2px;margin-left:-9px;
  border-radius:2px;background:var(--cyan);
  transition:transform .3s var(--ease),opacity .3s var(--ease);
}
.nav-toggle-bar--a{top:16px}
.nav-toggle-bar--b{top:22px}
.nav-toggle-bar--c{top:28px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar--a{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar--b{opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar--c{transform:translateY(-6px) rotate(-45deg)}
.header-progress{
  position:absolute;left:0;right:0;bottom:-1px;height:3px;
  background-color:rgba(31,224,208,.12);pointer-events:none;
}
.header-progress-bar{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background-image:linear-gradient(90deg,var(--cyan),var(--cyan-soft) 45%,var(--violet));
}

/* ===== 07 页脚 ===== */
.site-footer{
  position:relative;overflow:hidden;
  margin-top:clamp(64px,9vw,140px);
  padding:clamp(48px,7vw,96px) 0 28px;
  border-top:1px solid var(--line);
  background-image:linear-gradient(180deg,rgba(6,26,44,0),#061a2c 20%,#04101F 100%);
  color:var(--ice);
}
.footer-glow{
  position:absolute;left:-10%;right:-10%;top:-40%;height:80%;pointer-events:none;
  background:
    radial-gradient(48% 56% at 18% 44%, rgba(31,224,208,.18), transparent 70%),
    radial-gradient(44% 52% at 82% 32%, rgba(168,85,247,.18), transparent 72%);
}
.footer-orbit{
  position:absolute;right:-70px;bottom:-90px;width:300px;height:300px;
  border-radius:50%;border:1px dashed rgba(31,224,208,.26);pointer-events:none;
}
.footer-shell{position:relative;width:calc(100% - 40px);max-width:var(--shell);margin-inline:auto}
.footer-top{
  display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1.6fr);
  gap:clamp(28px,4vw,64px);
  padding-bottom:clamp(26px,4vw,46px);
  border-bottom:1px dashed var(--line-soft);
}
.footer-brand-name{
  display:block;margin-bottom:14px;
  font-family:var(--font-display);font-size:clamp(1.15rem,2vw,1.45rem);
  font-weight:800;letter-spacing:.03em;line-height:1.35;
}
.footer-summary{color:var(--mist);max-width:46ch;margin:0 0 18px}
.footer-chips{display:flex;flex-wrap:wrap;gap:8px}
.footer-chip{
  padding:5px 14px;border-radius:var(--r-pill);
  font-size:.78rem;letter-spacing:.06em;
  border:1px solid currentColor;
  background-color:rgba(4,16,31,.6);
}
.footer-chip--cyan{color:var(--cyan)}
.footer-chip--coral{color:var(--coral)}
.footer-chip--violet{color:var(--violet)}
.footer-chip--amber{color:var(--amber)}
.footer-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:clamp(20px,3vw,40px)}
.footer-col-title{
  margin:0 0 16px;
  font-family:var(--font-body);font-size:.78rem;font-weight:600;
  letter-spacing:.18em;text-transform:uppercase;color:var(--mist);
}
.footer-links{display:grid;gap:10px}
.footer-link{
  display:inline-flex;align-items:center;gap:9px;
  font-size:.95rem;color:rgba(234,246,255,.86);
  transition:color .25s var(--ease),transform .25s var(--ease);
}
.footer-link::before{
  content:"";flex:none;width:9px;height:9px;border-radius:50%;
  border:1px solid currentColor;opacity:.75;
}
.footer-link:hover{color:var(--cyan);transform:translateX(3px)}
.footer-contact{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));
  gap:12px 32px;
  padding:22px 0;
  border-bottom:1px dashed var(--line-soft);
}
.contact-line{margin:0;font-size:.95rem;color:var(--ice);word-break:break-all}
.contact-label{
  display:block;
  font-size:.74rem;letter-spacing:.16em;text-transform:uppercase;color:var(--mist);
  margin-bottom:2px;
}
.contact-note{grid-column:1 / -1;margin:4px 0 0;color:var(--mist);font-size:.85rem;max-width:80ch}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px 28px;align-items:center;justify-content:space-between;
  padding-top:22px;color:var(--mist);font-size:.85rem;
}
.footer-legal,.footer-meta{margin:0}
.footer-meta span{font-family:var(--font-num);letter-spacing:.12em;color:var(--cyan)}

/* ===== 08 版式组件 ===== */
.band{position:relative;padding:clamp(46px,7vw,104px) 0}
.band--hull{background-image:linear-gradient(180deg,rgba(10,33,54,0),rgba(10,33,54,.86) 22%,rgba(10,33,54,.86) 78%,rgba(10,33,54,0))}
.band--cyan{background-image:linear-gradient(100deg,rgba(31,224,208,.14),rgba(31,224,208,0) 62%)}
.band--coral{background-image:linear-gradient(100deg,rgba(255,122,69,.16),rgba(255,122,69,0) 62%)}
.band--violet{background-image:linear-gradient(100deg,rgba(168,85,247,.16),rgba(168,85,247,0) 62%)}
.band--amber{background-image:linear-gradient(100deg,rgba(255,197,61,.14),rgba(255,197,61,0) 62%)}
.pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 15px;border-radius:var(--r-pill);
  font-size:.8rem;letter-spacing:.06em;
  border:1px solid rgba(31,224,208,.4);
  background-color:rgba(31,224,208,.08);color:var(--cyan);
}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--r-pill);
  font-size:.78rem;letter-spacing:.06em;border:1px solid currentColor;
  background-color:rgba(4,16,31,.55);
}
.tag--cyan{color:var(--cyan)}
.tag--coral{color:var(--coral)}
.tag--violet{color:var(--violet)}
.tag--amber{color:var(--amber)}
.card{
  padding:clamp(20px,2.6vw,32px);
  border:1px solid var(--line);border-radius:var(--r-lg);
  background-image:linear-gradient(158deg,rgba(18,58,90,.72),rgba(4,16,31,.86));
}
.card--panel{
  border-color:rgba(31,224,208,.26);
  background-image:linear-gradient(158deg,rgba(10,33,54,.92),rgba(4,16,31,.96));
}
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(18px,2.4vw,32px)}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-12{grid-column:span 12}
.breadcrumbs{display:flex;flex-wrap:wrap;gap:10px;padding:6px 0;font-size:.82rem;color:var(--mist)}
.crumb{display:inline-flex;align-items:center}
.crumb + .crumb::before{content:"/";margin-right:10px;color:rgba(140,166,191,.55)}
.crumb a{color:var(--mist)}
.crumb a:hover{color:var(--cyan)}
.crumb[aria-current="page"]{color:var(--ice)}
.divider{
  height:1px;border:0;margin:clamp(28px,4vw,56px) 0;
  background-image:linear-gradient(90deg,rgba(31,224,208,.55),rgba(168,85,247,.35) 45%,transparent);
}
.fold{
  border:1px solid var(--line);border-radius:var(--r-md);
  background-color:rgba(10,33,54,.6);overflow:hidden;
}
.fold + .fold{margin-top:12px}
.fold-trigger{
  display:flex;width:100%;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 20px;text-align:left;font-weight:600;cursor:pointer;
}
.fold-trigger::after{
  content:"+";flex:none;font-family:var(--font-num);font-size:1.3rem;color:var(--cyan);
  transition:transform .3s var(--ease);
}
.fold-trigger[aria-expanded="true"]::after{transform:rotate(45deg)}
.fold-body{padding:0 20px 20px;color:var(--mist)}
.fold-body[hidden]{display:none}
.media{
  position:relative;display:block;overflow:hidden;isolation:isolate;
  border:1px solid var(--line);border-radius:var(--r-lg);
  background-image:linear-gradient(150deg,#0A2136,#123A5A 55%,#04101F);
}
.media img{width:100%;height:100%;object-fit:cover}
.media::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(180deg,rgba(4,16,31,0) 52%,rgba(4,16,31,.62));
}
.media--wide{aspect-ratio:16 / 9}
.media--tall{aspect-ratio:4 / 5}
.media--square{aspect-ratio:1 / 1}
.media--ring{border-radius:50%;aspect-ratio:1 / 1}
.media--placeholder{
  background-image:
    radial-gradient(circle at 22% 26%, rgba(31,224,208,.28), transparent 46%),
    radial-gradient(circle at 76% 68%, rgba(255,122,69,.24), transparent 48%),
    repeating-linear-gradient(120deg, rgba(234,246,255,.06) 0 1px, transparent 1px 48px),
    linear-gradient(150deg,#0A2136,#123A5A 60%,#04101F);
}
.media-caption{margin-top:10px;font-size:.82rem;color:var(--mist)}

/* ===== 09 显现与动效 ===== */
[data-reveal]{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
[data-reveal].is-visible{opacity:1;transform:none}

@media (prefers-reduced-motion: reduce){
  html:focus-within{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;animation-iteration-count:1!important;
    transition-duration:.001ms!important;scroll-behavior:auto!important;
  }
  [data-reveal]{opacity:1!important;transform:none!important;transition:none!important}
  .brand-ring{animation:none}
}

/* ===== 10 响应式 ===== */
@media (max-width:1279px){
  .brand-tagline{display:none}
}
@media (max-width:1180px){
  .nav-link{padding:8px 10px;font-size:.87rem}
}
@media (max-width:1080px){
  :root{--header-h:70px}
  .header-shell{grid-template-columns:minmax(0,1fr) auto;padding:8px 0}
  .header-actions .btn-ghost{display:none}
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:fixed;top:calc(var(--header-h) + 14px);left:14px;right:14px;
    padding:18px;border:1px solid rgba(31,224,208,.3);border-radius:var(--r-lg);
    background-image:linear-gradient(158deg,rgba(10,33,54,.98),rgba(4,16,31,.98));
    box-shadow:0 30px 64px rgba(0,0,0,.62);
    max-height:calc(100vh - var(--header-h) - 40px);overflow:auto;
    opacity:0;visibility:hidden;pointer-events:none;
    transform:translateY(-14px) scale(.98);
    transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s var(--ease);
  }
  .site-nav[data-open]{opacity:1;visibility:visible;pointer-events:auto;transform:none}
  .nav-list{flex-direction:column;align-items:stretch;gap:8px}
  .nav-link{
    width:100%;padding:14px 18px 14px 54px;border-radius:20px;
    font-size:1rem;
    border:1px solid rgba(31,224,208,.16);
    background-color:rgba(18,58,90,.5);
  }
  .nav-link::before{
    content:"";position:absolute;left:18px;top:50%;
    width:20px;height:20px;margin-top:-10px;border-radius:50%;
    border:2px solid rgba(31,224,208,.55);
    background:radial-gradient(circle at 34% 30%,rgba(31,224,208,.55),transparent 70%);
  }
  .nav-link[aria-current="page"]::after{left:18px;right:18px;bottom:8px}
  .footer-top{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:900px){
  .col-4,.col-5,.col-6,.col-7,.col-8{grid-column:1 / -1}
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:640px){
  body{font-size:16px}
  .container,.container--wide,.footer-shell{width:calc(100% - 32px)}
  .display-title::after{height:8px;margin-top:16px}
  .card{border-radius:var(--r-md)}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .footer-orbit{display:none}
}