/* ============================================================
   7电子娱乐馆 · /assets/site.css
   深海基底 + 霓虹紫/电光青对撞的纵向叙事长卷
   ============================================================ */

/* ---------- 1. 设计变量 ---------- */
:root{
  --ink-950:#050B1A;
  --ink-900:#0B1730;
  --ink-800:#132247;
  --purple:#7B4DFF;
  --purple-soft:#A78BFA;
  --cyan:#25D9E8;
  --orange:#FF9C4A;
  --text:#E9EFFF;
  --text-soft:#C7D3F0;
  --muted:#9FB0D8;
  --line:#22335C;
  --line-strong:#2E4370;

  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-body:system-ui,-apple-system,"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;

  --shell:1240px;
  --gutter:clamp(18px,4vw,40px);
  --radius:18px;
  --radius-sm:12px;
  --ease:cubic-bezier(.22,.7,.3,1);
  --dur:.42s;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  color:var(--text);
  background-color:var(--ink-950);
  background-image:
    radial-gradient(900px 520px at 12% -6%,rgba(123,77,255,.22),transparent 70%),
    radial-gradient(760px 480px at 88% 3%,rgba(37,217,232,.12),transparent 72%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
@media (min-width:768px){ body{font-size:17px} }
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}
::selection{background:rgba(123,77,255,.5);color:#fff}

/* ---------- 3. 基础排版 ---------- */
.h-display{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(40px,7vw,88px);
  line-height:1.06;
  letter-spacing:-.02em;
  margin:0;
}
.h-section{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(26px,3.2vw,40px);
  line-height:1.2;
  letter-spacing:-.01em;
  margin:0;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.18em;
  color:var(--cyan);
  text-transform:uppercase;
}
.eyebrow::before{
  content:"";
  width:26px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--purple),var(--cyan));
}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.06em}
.prose{max-width:68ch}
.prose p{margin-bottom:1.15em;color:var(--text-soft)}
.prose p:last-child{margin-bottom:0}
.prose a{color:var(--cyan);border-bottom:1px solid rgba(37,217,232,.4)}
.prose a:hover{color:var(--purple-soft);border-bottom-color:var(--purple-soft)}
.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;
}
.container{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.section{position:relative;padding-block:clamp(56px,8vw,112px)}
.section--tight{padding-block:clamp(36px,5vw,64px)}

/* ---------- 4. 跳至主要内容 ---------- */
.skip-link{
  position:absolute;
  left:50%;
  top:-120px;
  transform:translateX(-50%);
  z-index:140;
  padding:10px 22px;
  border-radius:0 0 12px 12px;
  background:var(--cyan);
  color:#04121A;
  font-size:14px;
  font-weight:700;
  transition:top .24s var(--ease);
}
.skip-link:focus{top:0}

/* ---------- 5. 页头：居中刊头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(5,11,26,.88);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.scroll-progress{
  position:fixed;
  top:0;left:0;right:0;
  height:2px;
  z-index:130;
  pointer-events:none;
}
.scroll-progress span{
  display:block;
  height:100%;
  width:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--purple),var(--cyan) 62%,var(--orange));
}
.site-header__inner{
  position:relative;
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.masthead{
  display:grid;
  grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);
  align-items:center;
  gap:clamp(12px,2vw,28px);
  padding-block:clamp(12px,1.6vw,18px);
}
.masthead__rail{
  height:1px;
  background:linear-gradient(90deg,transparent,var(--purple) 62%,var(--purple-soft));
}
.masthead__rail--right{
  background:linear-gradient(270deg,transparent,var(--purple) 62%,var(--purple-soft));
}
.masthead__brand{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:5px;
  padding-inline:clamp(6px,1.6vw,18px);
  text-align:center;
}
.masthead__name{
  display:inline-flex;
  align-items:baseline;
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(21px,2.6vw,30px);
  line-height:1.05;
  letter-spacing:-.02em;
  white-space:nowrap;
}
.masthead__mark{
  margin-right:.06em;
  background:linear-gradient(120deg,var(--cyan),var(--purple-soft));
  -webkit-background-clip:text;
  background-clip:text;
  color:var(--cyan);
  -webkit-text-fill-color:transparent;
}
.masthead__sub{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.06em;
  color:var(--muted);
  white-space:nowrap;
}
.masthead__quick{
  position:absolute;
  right:var(--gutter);
  top:clamp(14px,2vw,22px);
  display:flex;
  align-items:center;
  gap:10px;
  z-index:2;
}
.quick-link{
  display:inline-flex;
  align-items:center;
  padding:7px 15px;
  border:1px solid var(--line-strong);
  border-radius:999px;
  background:rgba(19,34,71,.55);
  color:var(--muted);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.08em;
  white-space:nowrap;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.quick-link:hover{
  color:var(--text);
  border-color:var(--purple-soft);
  transform:translateY(-2px);
  box-shadow:0 12px 26px -18px rgba(123,77,255,.95);
}
.quick-link--accent{
  color:#04121A;
  font-weight:700;
  border-color:transparent;
  background:linear-gradient(100deg,var(--cyan),var(--purple-soft));
}
.quick-link--accent:hover{color:#04121A;border-color:transparent}

/* 移动端栏目开关 */
.nav-toggle{
  display:none;
  width:100%;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:12px 0;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.16em;
  color:var(--muted);
}
.nav-toggle__label{display:inline-block}
.nav-toggle__bars{
  display:inline-flex;
  flex-direction:column;
  align-items:flex-end;
  gap:4px;
  width:20px;
}
.nav-toggle__bars span{
  display:block;
  height:2px;
  width:20px;
  border-radius:2px;
  background:var(--muted);
  transition:transform .3s var(--ease),width .3s var(--ease),background .3s var(--ease),opacity .3s var(--ease);
}
.nav-toggle__bars span:nth-child(2){width:13px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span{background:var(--cyan)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){width:20px;opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* 主导航条 */
.nav-bar{
  position:relative;
  border-top:1px solid var(--line);
}
.nav-bar::before{
  content:"";
  position:absolute;
  left:0;right:0;top:-1px;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(123,77,255,.7),transparent);
}
.nav-bar__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:center;
  gap:clamp(2px,1.4vw,14px);
}
.nav-bar__item{list-style:none}
.nav-link{
  position:relative;
  display:inline-block;
  padding:14px clamp(8px,1.4vw,16px);
  font-size:14px;
  font-weight:600;
  line-height:1.3;
  letter-spacing:.06em;
  color:var(--muted);
  transition:color .28s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:50%;
  right:50%;
  bottom:5px;
  height:2px;
  border-radius:2px;
  background:var(--cyan);
  transition:left .32s var(--ease),right .32s var(--ease),box-shadow .32s var(--ease);
}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{left:22%;right:22%}
.nav-link[aria-current="page"]{color:var(--text)}
.nav-link[aria-current="page"]::after{
  left:22%;right:22%;
  box-shadow:0 0 14px rgba(37,217,232,.85);
}

/* 移动端底部快捷栏 */
.dock{display:none}
.dock__list{
  display:grid;
  grid-template-columns:repeat(5,minmax(0,1fr));
  gap:2px;
}
.dock__item{list-style:none}
.dock-link{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:4px;
  padding:6px 2px;
  border-radius:12px;
  color:var(--muted);
  font-size:10.5px;
  letter-spacing:.04em;
  transition:color .25s var(--ease),background .25s var(--ease);
}
.dock-link__icon{
  width:20px;
  height:20px;
  fill:none;
  stroke:currentColor;
  stroke-width:1.7;
  stroke-linecap:round;
  stroke-linejoin:round;
}
.dock-link__label{display:block;line-height:1.2}
.dock-link[aria-current="page"]{
  color:var(--cyan);
  background:rgba(37,217,232,.1);
}

/* ---------- 6. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,96px);
  background:linear-gradient(180deg,var(--ink-900),var(--ink-950) 72%);
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";
  position:absolute;
  left:0;right:0;top:-1px;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--purple),var(--cyan),transparent);
  opacity:.85;
}
.footer__inner{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(48px,7vw,84px) var(--gutter) clamp(28px,4vw,44px);
}
.footer__grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(24px,3vw,48px);
}
.footer__col{min-width:0}
.footer__title{
  margin-bottom:16px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.18em;
  color:var(--cyan);
}
.footer__list{
  display:flex;
  flex-direction:column;
  gap:10px;
}
.footer-link{
  display:inline-block;
  font-size:14.5px;
  color:var(--muted);
  transition:color .25s var(--ease),padding-left .25s var(--ease);
}
.footer-link:hover{color:var(--text);padding-left:6px}
.footer__closing{
  margin-top:clamp(36px,5vw,64px);
  padding-top:clamp(28px,4vw,44px);
  border-top:1px solid var(--line);
  max-width:26ch;
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(20px,2.6vw,30px);
  line-height:1.42;
  letter-spacing:-.01em;
  color:var(--text);
}
.footer__brand{
  display:block;
  margin-bottom:10px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.2em;
  color:var(--purple-soft);
}
.footer__meta{
  margin-top:clamp(28px,4vw,46px);
  padding-top:22px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px 30px;
}
.footer__contact{
  max-width:64ch;
  font-size:13.5px;
  line-height:1.8;
  color:var(--muted);
}
.footer__legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 22px;
}
.footer__copyright{
  margin-top:18px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:rgba(159,176,216,.72);
}
.to-top{
  position:fixed;
  right:clamp(16px,3vw,32px);
  bottom:clamp(16px,3vw,32px);
  z-index:115;
  display:grid;
  place-items:center;
  width:46px;
  height:46px;
  border:1px solid var(--line-strong);
  border-radius:14px;
  background:rgba(19,34,71,.88);
  color:var(--cyan);
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s var(--ease),border-color .3s var(--ease);
}
.to-top.is-visible{opacity:1;visibility:visible;transform:none}
.to-top:hover{border-color:var(--cyan)}
.to-top__icon{
  width:20px;height:20px;
  fill:none;stroke:currentColor;
  stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round;
}

/* ---------- 7. 通用组件 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:14px 26px;
  border:1px solid transparent;
  border-radius:999px;
  font-size:15px;
  font-weight:700;
  letter-spacing:.03em;
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.btn:hover{transform:translateY(-3px)}
.btn--primary{
  color:#fff;
  background:linear-gradient(100deg,var(--purple),var(--purple-soft));
  box-shadow:0 16px 34px -20px rgba(123,77,255,1);
}
.btn--primary:hover{box-shadow:0 20px 40px -18px rgba(123,77,255,1)}
.btn--ghost{
  color:var(--text);
  border-color:var(--line-strong);
  background:rgba(19,34,71,.5);
}
.btn--ghost:hover{color:var(--cyan);border-color:var(--cyan)}

.breadcrumb{padding-block:18px}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--muted);
}
.breadcrumb__item{list-style:none;color:var(--muted)}
.breadcrumb__item[aria-current="page"]{color:var(--text)}
.breadcrumb__link{color:var(--muted);transition:color .25s var(--ease)}
.breadcrumb__link:hover{color:var(--cyan)}
.breadcrumb__sep{color:var(--line-strong)}

.grid{display:grid;gap:clamp(18px,2.4vw,30px)}
.grid--split{grid-template-columns:minmax(0,66fr) minmax(0,34fr)}
.grid--cards{grid-template-columns:repeat(auto-fit,minmax(255px,1fr))}

.card{
  position:relative;
  padding:clamp(20px,2.4vw,30px);
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(160deg,var(--ink-800),var(--ink-900) 72%);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.card:hover{
  transform:translateY(-4px);
  border-color:var(--purple-soft);
  box-shadow:0 24px 48px -32px rgba(123,77,255,.95);
}
.card--cut{
  clip-path:polygon(0 0,calc(100% - 22px) 0,100% 22px,100% 100%,22px 100%,0 calc(100% - 22px));
  border-radius:0;
}
.card__label{
  display:block;
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:600;
  letter-spacing:.16em;
  color:var(--cyan);
}
.card__title{
  margin-top:12px;
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(19px,2vw,23px);
  line-height:1.3;
  letter-spacing:-.01em;
}
.card__text{
  margin-top:10px;
  font-size:15px;
  color:var(--muted);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 11px;
  border:1px solid var(--line-strong);
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.12em;
  color:var(--muted);
  white-space:nowrap;
}
.tag--cyan{color:var(--cyan);border-color:rgba(37,217,232,.55);background:rgba(37,217,232,.08)}
.tag--orange{color:var(--orange);border-color:rgba(255,156,74,.55);background:rgba(255,156,74,.1)}
.tag--purple{color:var(--purple-soft);border-color:rgba(123,77,255,.62);background:rgba(123,77,255,.14)}

.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  min-height:200px;
  aspect-ratio:16/10;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(155deg,var(--ink-800),var(--ink-950));
  isolation:isolate;
}
.media-frame > img,
.media-frame > svg,
.media-frame > video{
  position:relative;
  z-index:1;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:2;
  pointer-events:none;
  background:
    radial-gradient(58% 46% at 78% 10%,rgba(123,77,255,.34),transparent 70%),
    radial-gradient(52% 42% at 12% 90%,rgba(37,217,232,.2),transparent 72%);
  mix-blend-mode:screen;
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame__caption{
  position:absolute;
  left:0;right:0;bottom:0;
  z-index:3;
  padding:clamp(16px,2vw,26px);
  background:linear-gradient(180deg,transparent,rgba(5,11,26,.94));
  font-size:13.5px;
  color:var(--muted);
}

.legend{
  display:flex;
  flex-wrap:wrap;
  gap:10px 20px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--muted);
}
.legend__item{display:inline-flex;align-items:center;gap:8px}
.legend__dot{width:8px;height:8px;border-radius:2px;background:var(--cyan)}
.legend__dot--purple{background:var(--purple)}
.legend__dot--orange{background:var(--orange)}

/* ---------- 8. 动效：进入视口渐显 ---------- */
html.has-reveal [data-reveal]{
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
html.has-reveal [data-reveal]:not(.is-in){
  opacity:0;
  transform:translateY(20px);
}

/* ---------- 9. 响应式 ---------- */
@media (max-width:1120px){
  .masthead__quick{display:none}
}

@media (max-width:900px){
  body{padding-bottom:calc(64px + env(safe-area-inset-bottom,0px))}

  .masthead{padding-block:14px}
  .masthead__sub{display:none}
  .masthead__rail{opacity:.6}

  .nav-toggle{display:flex}
  .nav-bar{display:none;border-top:1px solid var(--line)}
  .nav-bar[data-open]{
    display:block;
    animation:navIn .32s var(--ease) both;
  }
  .nav-bar__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:6px 0 18px;
  }
  .nav-link{
    display:block;
    padding:14px 4px;
    font-size:15px;
    border-bottom:1px solid rgba(34,51,92,.6);
  }
  .nav-link::after{display:none}
  .nav-link[aria-current="page"]{color:var(--cyan);padding-left:16px}
  .nav-link[aria-current="page"]::before{
    content:"";
    position:absolute;
    left:0;
    top:50%;
    width:6px;
    height:6px;
    border-radius:50%;
    background:var(--cyan);
    transform:translateY(-50%);
    box-shadow:0 0 10px rgba(37,217,232,.9);
  }

  .dock{
    display:block;
    position:fixed;
    left:0;right:0;bottom:0;
    z-index:110;
    padding:8px 6px calc(8px + env(safe-area-inset-bottom,0px));
    background:rgba(9,19,40,.95);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
    border-top:1px solid var(--line);
  }

  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__meta{flex-direction:column;align-items:flex-start}
  .to-top{bottom:calc(80px + env(safe-area-inset-bottom,0px))}
  .grid--split{grid-template-columns:minmax(0,1fr)}
}

@media (max-width:520px){
  .footer__grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .footer__closing{max-width:none}
  .media-frame{aspect-ratio:4/3}
  .media-frame--wide{aspect-ratio:16/9}
}

@keyframes navIn{
  from{opacity:0;transform:translateY(-8px)}
  to{opacity:1;transform:none}
}

/* ---------- 10. 降低动态偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  body{background-attachment:scroll}
  .card:hover,.btn:hover,.quick-link:hover,.footer-link:hover{transform:none}
  .quick-link:hover,.card:hover{box-shadow:none}
  .media-frame::after{display:none}
  html.has-reveal [data-reveal]:not(.is-in){opacity:1;transform:none}
}