/* =========================================================
   鱼丸游戏开服 · /assets/site.css
   共享外壳：blueprint frame + 切角面板 + 霓虹数字
   ========================================================= */

:root{
  --sea-900:#071A38;
  --sea-800:#0C2246;
  --bridge:#12305C;
  --orange:#FF4D1C;
  --orange-soft:#FF8A5B;
  --cyan:#28E0E0;
  --neon:#FFE24D;
  --foam:#F4F8FF;
  --ink:#0B1220;
  --mist:#2A4570;
  --magenta:#FF3D8B;
  --ink-soft:#3A4A66;
  --text-dim:#9FB6D6;
  --text-dim-2:#7E96BC;

  --rail-w:76px;
  --header-h:68px;
  --ease:cubic-bezier(.2,.7,.3,1);

  --font-display:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --font-body:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono","Courier New",monospace;
}

/* ---------------- reset ---------------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,dl,dd,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img,picture,svg,video{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}

h1,h2,h3,h4{font-family:var(--font-display);font-weight:900;line-height:1.14;letter-spacing:-.02em}
p{line-height:1.55}

/* ---------------- page shell ---------------- */
body{
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.55;
  color:var(--foam);
  background:var(--sea-900);
  padding-top:var(--header-h);
  min-height:100vh;
}

/* 蓝图网格底纹 */
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    repeating-linear-gradient(to right,rgba(42,69,112,.42) 0 1px,transparent 1px 64px),
    repeating-linear-gradient(to bottom,rgba(42,69,112,.42) 0 1px,transparent 1px 64px),
    radial-gradient(120% 90% at 12% 0%,rgba(18,48,92,.75),transparent 60%),
    radial-gradient(90% 70% at 100% 10%,rgba(255,77,28,.10),transparent 62%);
}
body > *{position:relative;z-index:1}

:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

.skip-link{
  position:fixed;top:10px;left:10px;z-index:200;
  padding:.6em 1em;font-weight:800;font-size:14px;
  color:var(--ink);background:var(--neon);
  border-radius:2px;
  transform:translateY(-200%);
  transition:transform .18s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ---------------- container & layout tools ---------------- */
.container{width:min(1180px,100% - 2.5rem);margin-inline:auto}

.section{position:relative;padding-block:clamp(3rem,7vw,6rem);overflow:hidden}
.section--bridge{background:linear-gradient(165deg,rgba(12,34,70,.94),rgba(18,48,92,.82))}
.section--foam{background:var(--foam);color:var(--ink)}
.section--foam .section-title{color:var(--ink)}
.section--foam .lede{color:var(--ink-soft)}
.section--foam .eyebrow{color:var(--bridge)}

.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;
  justify-content:space-between;
  gap:1rem 2.5rem;
  margin-bottom:clamp(1.5rem,3vw,2.5rem);
}
.section-title{font-size:clamp(1.9rem,4.6vw,3.4rem);max-width:22ch}
.eyebrow{
  display:inline-flex;align-items:center;gap:.6rem;
  font-family:var(--font-num);font-size:12.5px;font-weight:700;
  letter-spacing:.18em;color:var(--cyan);text-transform:uppercase;
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--orange);flex:none}
.lede{font-size:clamp(1rem,1.35vw,1.1rem);color:#B9CBEA;max-width:62ch}

.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(1rem,2vw,1.5rem)}
.grid-12 > *{grid-column:span 12}

.stack{display:flex;flex-direction:column;gap:clamp(.75rem,1.6vw,1.15rem)}
.list-tight{display:flex;flex-direction:column;gap:.5rem}
.divider{height:1px;border:0;background:var(--mist);margin-block:clamp(1.5rem,3vw,2.5rem)}

/* ---------------- buttons ---------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  padding:.75em 1.15em;
  font-family:var(--font-display);font-weight:800;font-size:15px;line-height:1;
  border:1px solid transparent;border-radius:2px;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
  transition:transform .18s var(--ease),background-color .18s var(--ease),
             color .18s var(--ease),border-color .18s var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(1px)}
.btn--primary{background:var(--orange);color:var(--ink)}
.btn--primary:hover{background:var(--orange-soft)}
.btn--ghost{background:transparent;color:var(--cyan);border-color:var(--mist)}
.btn--ghost:hover{border-color:var(--cyan);background:rgba(40,224,224,.10)}
.btn--sm{padding:.55em .85em;font-size:13.5px}

/* ---------------- header : frame navigation ---------------- */
.site-header{position:fixed;top:0;left:0;right:0;z-index:60}

.header-progress{position:absolute;top:0;left:0;right:0;height:3px;background:rgba(42,69,112,.7);z-index:2}
.header-progress__fill{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--orange),var(--neon) 55%,var(--cyan));
}

.header-bar{
  position:relative;
  display:flex;align-items:center;gap:clamp(.75rem,2vw,1.5rem);
  height:var(--header-h);
  padding-inline:clamp(1rem,2.5vw,1.75rem);
  background:linear-gradient(90deg,rgba(7,26,56,.97),rgba(12,34,70,.94));
  border-bottom:1px solid var(--mist);
  backdrop-filter:blur(8px);
}
.header-bar::after{
  content:"";position:absolute;right:0;bottom:-1px;width:38%;height:2px;
  background:linear-gradient(90deg,transparent,var(--orange));
}

.brand{display:flex;align-items:center;gap:.7rem;min-width:0}
.brand-mark{
  display:grid;place-items:center;flex:none;
  width:38px;height:38px;
  font-family:var(--font-num);font-weight:800;font-size:15px;letter-spacing:.02em;
  color:var(--ink);
  background:linear-gradient(140deg,var(--orange),var(--orange-soft));
  clip-path:polygon(0 0,100% 0,100% 74%,74% 100%,0 100%);
}
.brand-text{display:flex;flex-direction:column;line-height:1.14;min-width:0}
.brand-name{font-family:var(--font-display);font-weight:900;font-size:19px;color:var(--foam)}
.brand-line{font-size:11.5px;letter-spacing:.1em;color:var(--cyan)}

.header-utils{display:flex;align-items:center;gap:.3rem;margin-left:auto}
.util-link{
  font-size:13.5px;color:var(--text-dim);
  padding:.45em .55em;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.util-link:hover{color:var(--cyan);border-bottom-color:var(--cyan)}

.header-actions{display:flex;align-items:center;gap:.5rem}

.nav-toggle{
  display:none;align-items:center;gap:.5rem;
  padding:.5em .7em;
  font-size:13px;font-weight:700;color:var(--foam);
  border:1px solid var(--mist);border-radius:2px;
  transition:border-color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan)}
.nav-toggle__bars{position:relative;width:18px;height:12px;flex:none}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";position:absolute;left:0;right:0;height:2px;background:var(--orange);
  transition:transform .2s var(--ease),top .2s var(--ease),bottom .2s var(--ease);
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{bottom:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:5px;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{bottom:5px;transform:rotate(-45deg)}

/* 桌面：导航成为左侧边框 */
.site-nav{
  position:fixed;top:var(--header-h);left:0;bottom:0;width:var(--rail-w);
  display:flex;align-items:center;justify-content:center;
  overflow-y:auto;
  background:linear-gradient(180deg,rgba(7,26,56,.98),rgba(12,34,70,.98));
  border-right:1px solid var(--mist);
}
.site-nav::after{
  content:"";position:absolute;right:6px;top:0;bottom:0;width:1px;
  background:repeating-linear-gradient(180deg,var(--mist) 0 1px,transparent 1px 12px);
}
.nav-list{display:flex;flex-direction:column;align-items:center;gap:.35rem;padding-block:1.25rem}
.nav-item{display:block}
.nav-link{
  position:relative;
  display:flex;flex-direction:column;align-items:center;gap:.45rem;
  padding:.65rem .8rem;
  color:var(--text-dim);
  transition:color .18s var(--ease);
}
.nav-link::before{
  content:"";position:absolute;left:0;top:50%;
  width:3px;height:72%;
  background:var(--orange);
  transform:translateY(-50%) scaleY(0);
  transition:transform .2s var(--ease);
}
.nav-link:hover{color:var(--cyan)}
.nav-index{font-family:var(--font-num);font-size:11px;letter-spacing:.06em;color:var(--mist)}
.nav-label{writing-mode:vertical-rl;font-size:14px;font-weight:700;letter-spacing:.22em}
.nav-link[aria-current="page"]{color:var(--orange)}
.nav-link[aria-current="page"] .nav-index{color:var(--cyan)}
.nav-link[aria-current="page"]::before{transform:translateY(-50%) scaleY(1)}

/* ---------------- footer ---------------- */
.site-footer{
  position:relative;
  margin-top:clamp(3rem,6vw,5rem);
  padding-block:clamp(2.5rem,5vw,4rem) 0;
  color:var(--foam);
  background:linear-gradient(180deg,var(--sea-900),var(--sea-800) 55%,var(--sea-900));
  border-top:1px solid var(--mist);
}
.site-footer::before{
  content:"";position:absolute;inset:0 0 auto 0;height:3px;
  background:linear-gradient(90deg,var(--orange),var(--magenta) 45%,var(--cyan));
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr repeat(3,minmax(0,1fr));
  gap:clamp(1.5rem,3vw,2.5rem);
}
.footer-brand__mark{font-family:var(--font-display);font-weight:900;font-size:clamp(1.4rem,2.6vw,1.9rem)}
.footer-brand__line{margin-top:.5rem;max-width:36ch;font-size:14.5px;color:var(--text-dim)}
.footer-brand__cta{margin-top:1.1rem}
.footer-col__title{
  margin:0 0 .9rem;
  font-family:var(--font-num);font-size:12.5px;font-weight:700;
  letter-spacing:.16em;color:var(--cyan);text-transform:uppercase;
}
.footer-list{display:flex;flex-direction:column;gap:.6rem}
.footer-list a{
  position:relative;display:inline-block;
  padding-left:.9rem;font-size:14.5px;color:#C6D5EC;
  transition:color .18s var(--ease);
}
.footer-list a::before{
  content:"";position:absolute;left:0;top:.6em;
  width:.5rem;height:1px;background:var(--mist);
  transition:background .18s var(--ease),width .18s var(--ease);
}
.footer-list a:hover{color:var(--foam)}
.footer-list a:hover::before{background:var(--orange);width:.72rem}

.footer-contact{
  margin-top:clamp(2rem,4vw,3rem);
  padding-top:1.5rem;
  border-top:1px dashed var(--mist);
  display:grid;grid-template-columns:repeat(auto-fit,minmax(215px,1fr));
  gap:1rem 1.5rem;
}
.footer-contact__item{font-size:14px;color:#C6D5EC;word-break:break-word}
.footer-contact__key{
  display:block;margin-bottom:.3rem;
  font-family:var(--font-num);font-size:11.5px;letter-spacing:.14em;color:var(--cyan);
}
.footer-contact__note{grid-column:1/-1;font-size:13px;color:var(--text-dim-2)}

.footer-base{
  margin-top:1.75rem;
  padding-block:1.1rem 1.5rem;
  border-top:1px solid var(--mist);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:.6rem 1.5rem;
  font-size:13px;color:var(--text-dim-2);
}
.footer-legal,.footer-note{margin:0}

/* ---------------- back to top ---------------- */
.to-top{
  position:fixed;right:clamp(1rem,3vw,1.75rem);bottom:clamp(1rem,3vw,1.75rem);z-index:70;
  display:inline-flex;align-items:center;justify-content:center;
  width:46px;height:46px;
  color:var(--orange);
  background:rgba(7,26,56,.92);
  border:1px solid var(--orange);
  clip-path:polygon(0 0,100% 0,100% 72%,72% 100%,0 100%);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),
             visibility .2s var(--ease),background-color .18s var(--ease),color .18s var(--ease);
}
.to-top[data-visible]{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--orange);color:var(--ink)}
.to-top__arrow{font-size:18px;line-height:1;font-weight:800}

/* ---------------- content components ---------------- */
.panel{
  position:relative;display:block;
  padding:clamp(1.1rem,2.2vw,1.6rem);
  background:linear-gradient(155deg,rgba(18,48,92,.92),rgba(12,34,70,.96));
  border:1px solid var(--mist);
  clip-path:polygon(0 0,calc(100% - 20px) 0,100% 20px,100% 100%,0 100%);
  transition:transform .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);
}
.panel::before{
  content:"";position:absolute;left:0;top:0;width:3px;height:38%;
  background:linear-gradient(180deg,var(--orange),transparent);
  transition:background .18s var(--ease);
}
.panel:hover{transform:translateY(-4px);border-color:var(--cyan)}
.panel:hover::before{background:linear-gradient(180deg,var(--cyan),transparent)}

.stat{display:flex;flex-direction:column;gap:.3rem}
.stat__num{
  font-family:var(--font-num);font-weight:800;
  font-size:clamp(1.9rem,4.6vw,3rem);line-height:1;
  letter-spacing:-.02em;color:var(--neon);
}
.stat__label{font-size:13.5px;color:var(--text-dim)}

.tag{
  display:inline-flex;align-items:center;gap:.4em;
  padding:.2em .6em;
  font-size:13px;font-weight:700;line-height:1.4;
  color:var(--cyan);
  border:1px solid var(--mist);border-radius:2px;
}
.tag--hot{color:var(--ink);background:var(--neon);border-color:var(--neon)}
.tag--event{color:var(--foam);background:var(--magenta);border-color:var(--magenta)}

.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;
  font-size:13.5px;color:var(--text-dim);
}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb__sep{color:var(--mist)}
.breadcrumb [aria-current="page"]{color:var(--foam)}

.copy-btn{
  display:inline-flex;align-items:center;gap:.45em;
  padding:.35em .7em;
  font-size:13.5px;font-weight:700;color:var(--cyan);
  background:rgba(40,224,224,.06);
  border:1px dashed var(--mist);border-radius:2px;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.copy-btn:hover{border-color:var(--cyan)}
.copy-btn.is-copied{background:var(--neon);color:var(--ink);border-color:var(--neon);border-style:solid}

.media{
  position:relative;display:block;overflow:hidden;
  background:linear-gradient(140deg,var(--sea-800),var(--bridge));
  border:1px solid var(--mist);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 26px),calc(100% - 26px) 100%,0 100%);
}
.media::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,transparent 48%,rgba(7,26,56,.85));
}
.media__img{width:100%;height:100%;object-fit:cover}
.media__ph{
  position:absolute;inset:0;z-index:1;
  display:grid;place-items:center;padding:1rem;
  font-family:var(--font-num);font-size:12.5px;letter-spacing:.14em;
  color:var(--text-dim);text-align:center;
}
.media__tag{
  position:absolute;left:0;bottom:0;z-index:2;
  padding:.45em .95em;
  font-family:var(--font-display);font-weight:800;font-size:13px;
  color:var(--ink);background:var(--orange);
  clip-path:polygon(0 0,100% 0,calc(100% - 12px) 100%,0 100%);
}
.media--16x9{aspect-ratio:16/9}
.media--4x3{aspect-ratio:4/3}
.media--3x4{aspect-ratio:3/4}
.media--1x1{aspect-ratio:1/1}

.aurora{
  position:absolute;pointer-events:none;z-index:0;
  opacity:.42;filter:blur(70px);
  background:linear-gradient(115deg,var(--orange),var(--magenta) 45%,var(--cyan));
  background-size:220% 220%;
  animation:auroraFlow 20s linear infinite;
}
@keyframes auroraFlow{
  0%{background-position:0% 50%}
  50%{background-position:100% 50%}
  100%{background-position:0% 50%}
}

/* ---------------- reveal ---------------- */
html.js [data-reveal]{
  opacity:0;transform:translateY(14px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
html.js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------------- responsive ---------------- */
@media (min-width:900px){
  body{padding-left:var(--rail-w)}
  .span-3{grid-column:span 3}
  .span-4{grid-column:span 4}
  .span-6{grid-column:span 6}
  .span-8{grid-column:span 8}
  .span-12{grid-column:span 12}
}

@media (max-width:1023px){
  .header-utils{display:none}
}

@media (max-width:899px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:fixed;top:var(--header-h);left:0;right:0;bottom:0;width:auto;
    display:block;
    padding:1.25rem clamp(1rem,4vw,2rem) 2.5rem;
    overflow-y:auto;
    background:linear-gradient(165deg,var(--sea-900),var(--sea-800));
    border-right:0;border-top:1px solid var(--mist);
    transform:translateX(-103%);
    visibility:hidden;
    transition:transform .28s var(--ease),visibility .28s var(--ease);
  }
  .site-nav::after{display:none}
  .site-nav[data-open]{transform:translateX(0);visibility:visible}
  .nav-list{align-items:stretch;gap:0;padding-block:0}
  .nav-link{
    flex-direction:row;align-items:center;justify-content:flex-start;
    gap:1rem;padding:.95rem .9rem;
    border-bottom:1px solid var(--mist);
  }
  .nav-link::before{height:1.35em;top:50%}
  .nav-label{writing-mode:horizontal-tb;font-family:var(--font-display);font-size:18px;letter-spacing:.06em}
  .nav-index{font-size:12px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1/-1}
}

@media (max-width:640px){
  body{font-size:16px}
  .container{width:min(1180px,100% - 1.75rem)}
  .header-actions .btn--ghost{display:none}
  .footer-grid{grid-template-columns:1fr}
  .footer-base{flex-direction:column;align-items:flex-start}
}

@media (max-width:480px){
  .brand-line{display:none}
  .nav-toggle__label{display:none}
}

/* ---------------- reduced motion ---------------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html.js [data-reveal]{opacity:1;transform:none}
  .aurora{animation:none}
  .btn:hover,.panel:hover{transform:none}
}