/* ============================================================
   616游戏站 · 共享样式 /assets/site.css
   深空黑连续画布 + 2px 硬边 + 6px 硬阴影 + 霓虹电光紫 / 荧光青
   ============================================================ */

:root{
  --ink:#07080F;
  --ink-2:#12141F;
  --violet:#8A5CFF;
  --cyan:#2BE3D6;
  --orange:#FF7A2F;
  --green:#38E08B;
  --red:#FF4D6D;
  --paper:#E9ECF5;
  --body-text:#C7CDE0;
  --muted:#9AA3BD;
  --line:#2A2E44;
  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-body:var(--font-display);
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --shell:1280px;
  --gap:clamp(16px,3vw,32px);
  --shadow-hard:6px 6px 0 var(--line);
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink);
  color:var(--body-text);
  font-family:var(--font-body);
  font-size:clamp(16px,.35vw + 15px,17px);
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,p,figure,blockquote,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;}
img,svg,video{display:block;max-width:100%;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:3px solid var(--cyan);outline-offset:2px;}
#main-content{scroll-margin-top:24px;}

/* ---------- 容器 ---------- */
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:clamp(16px,4vw,40px);}
.shell--narrow{max-width:880px;}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:absolute;left:16px;top:-120px;z-index:200;
  background:var(--cyan);color:var(--ink);
  font-weight:700;font-size:15px;padding:10px 18px;
  border:2px solid var(--ink-2);
  transition:top .2s var(--ease);
}
.skip-link:focus{top:12px;}

/* ---------- 滚动进度 ---------- */
.scroll-progress{
  position:fixed;top:0;left:0;right:0;height:3px;z-index:130;
  background:linear-gradient(90deg,var(--cyan),var(--violet) 58%,var(--orange));
  transform:scaleX(0);transform-origin:0 50%;
  pointer-events:none;
}

/* ---------- 页头 · 服务节奏条 ---------- */
.site-header{position:relative;z-index:90;background:var(--ink);}
.ticker{background:var(--ink-2);border-bottom:2px solid var(--line);}
.ticker__inner{
  display:flex;align-items:center;gap:10px;
  min-height:36px;overflow:hidden;white-space:nowrap;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
  color:var(--muted);
}
.ticker__dot{flex:none;width:7px;height:7px;background:var(--orange);box-shadow:0 0 0 3px rgba(255,122,47,.16);}
.ticker__text{margin:0;}
.ticker__text--muted{color:var(--violet);}
.ticker__sep{color:var(--line);}

/* ---------- 页头 · 品牌条 ---------- */
.masthead{background:var(--ink);border-bottom:2px solid var(--line);}
.masthead__inner{
  display:flex;flex-wrap:wrap;align-items:center;
  gap:clamp(14px,3vw,36px);
  padding-block:16px;
}
.brand{display:inline-flex;align-items:center;gap:12px;flex:none;}
.brand__mark{
  font-family:var(--font-mono);font-weight:700;
  font-size:clamp(20px,2.4vw,26px);line-height:1;letter-spacing:-.04em;
  color:var(--ink);background:var(--cyan);
  padding:9px 13px 8px;
  box-shadow:4px 4px 0 var(--violet);
  clip-path:polygon(0 0,100% 0,100% 72%,86% 100%,0 100%);
}
.brand__text{display:grid;gap:2px;}
.brand__text strong{font-size:clamp(15px,1.4vw,18px);font-weight:900;letter-spacing:.02em;line-height:1.1;color:var(--paper);}
.brand__text em{font-style:normal;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);}
.masthead__line{
  margin:0;margin-left:auto;
  padding-left:16px;border-left:2px solid var(--line);
  font-size:14px;color:var(--muted);
}
.masthead__actions{display:flex;align-items:center;gap:12px;}

/* ---------- 按钮 ---------- */
.btn{
  position:relative;overflow:hidden;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;
  font-size:15px;font-weight:700;letter-spacing:.02em;
  color:var(--paper);background:var(--ink-2);
  border:2px solid var(--line);
  box-shadow:4px 4px 0 var(--line);
  cursor:pointer;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),color .18s,background-color .18s,border-color .18s;
}
.btn::after{
  content:"";position:absolute;left:0;top:0;bottom:0;width:100%;
  background:linear-gradient(90deg,rgba(43,227,214,.34),rgba(43,227,214,0));
  transform:scaleX(0);transform-origin:0 50%;
  transition:transform .28s var(--ease);pointer-events:none;
}
.btn:hover::after,.btn:focus-visible::after{transform:scaleX(1);}
.btn:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--line);}
.btn:active{transform:translate(0,0);box-shadow:2px 2px 0 var(--line);}
.btn--cta{background:var(--cyan);color:var(--ink);border-color:var(--cyan);box-shadow:4px 4px 0 var(--violet);}
.btn--cta:hover{box-shadow:6px 6px 0 var(--violet);}
.btn--violet{background:var(--violet);border-color:var(--violet);color:#fff;box-shadow:4px 4px 0 var(--cyan);}
.btn--ghost{background:transparent;}

/* ---------- 移动菜单按钮 ---------- */
.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:11px 16px;
  background:var(--ink-2);border:2px solid var(--line);
  box-shadow:4px 4px 0 var(--line);
  color:var(--paper);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  cursor:pointer;
}
.nav-toggle__bars{display:grid;gap:4px;width:18px;}
.nav-toggle__bars span{display:block;height:2px;background:var(--cyan);transition:transform .22s var(--ease),opacity .22s;}
.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){opacity:0;}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
.nav-toggle__label{white-space:nowrap;}

/* ---------- 主栏目索引 ---------- */
.site-nav{background:var(--ink-2);border-bottom:2px solid var(--line);transition:max-height .34s var(--ease),border-color .34s;}
.site-nav__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;}
.nav-list{counter-reset:nav;display:flex;align-items:stretch;flex-wrap:wrap;}
.nav-list li{counter-increment:nav;display:flex;}
.nav-link{
  position:relative;
  display:inline-flex;align-items:baseline;gap:8px;
  padding:14px 18px;
  font-size:15px;font-weight:500;letter-spacing:.02em;
  color:var(--muted);
  transition:color .18s,background-color .18s;
}
.nav-link::before{
  content:counter(nav,decimal-leading-zero);
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.06em;
  color:var(--violet);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:3px;
  background:var(--cyan);transform:scaleX(0);transform-origin:0 50%;
  transition:transform .22s var(--ease);
}
.nav-link:hover{color:var(--paper);background:rgba(138,92,255,.12);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link[aria-current="page"]{color:var(--paper);background:rgba(43,227,214,.10);}
.nav-link[aria-current="page"]::after{transform:scaleX(1);}
.nav-link[aria-current="page"]::before{color:var(--cyan);}
.site-nav__meta{
  margin:0;flex:none;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  color:rgba(154,163,189,.55);
}

/* ---------- 页脚 ---------- */
.site-footer{position:relative;background:var(--ink);border-top:2px solid var(--line);}
.site-footer::before{
  content:"";position:absolute;top:-2px;left:0;right:0;height:6px;
  background:linear-gradient(90deg,
    var(--violet) 0 32%,
    var(--cyan) 32% 66%,
    var(--orange) 66% 100%);
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1.25fr .85fr;
  gap:clamp(24px,4vw,48px);
  padding-block:clamp(44px,6vw,76px) clamp(28px,4vw,48px);
}
.footer-brand{display:grid;align-content:start;}
.footer-mark{
  margin:0 0 10px;
  font-family:var(--font-mono);font-weight:700;
  font-size:clamp(56px,8vw,96px);line-height:.82;letter-spacing:-.05em;
  color:transparent;-webkit-text-stroke:2px var(--line);
}
.footer-brand__lead{margin:0 0 10px;max-width:24em;font-size:16px;color:var(--paper);}
.footer-brand__note{margin:0;font-size:13px;color:var(--muted);}
.footer-col__title{
  margin:0 0 14px;
  font-family:var(--font-mono);font-size:11.5px;font-weight:700;
  letter-spacing:.16em;text-transform:uppercase;color:var(--cyan);
}
.footer-list{display:grid;gap:10px;font-size:14.5px;color:var(--muted);}
.footer-list a{
  color:var(--muted);
  border-bottom:1px solid transparent;
  transition:color .18s,border-color .18s;
}
.footer-list a:hover{color:var(--cyan);border-bottom-color:var(--cyan);}
.footer-list--plain li{line-height:1.7;}
.footer-base{border-top:2px solid var(--line);background:var(--ink-2);}
.footer-base__inner{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 24px;
  padding-block:16px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;
  color:var(--muted);
}
.footer-base__inner p{margin:0;}
.footer-base__tip{margin-left:auto;color:rgba(154,163,189,.72);}

/* ---------- 移动端底部快捷栏 ---------- */
.footer-dock{display:none;}

/* ============================================================
   页面阶段可用的通用组件
   ============================================================ */

/* 章节 */
.section{padding-block:clamp(48px,7vw,96px);border-top:2px solid var(--line);}
.section--alt{background:var(--ink-2);}
.section--tight{padding-block:clamp(32px,4vw,56px);}
.section__head{margin-bottom:clamp(24px,4vw,48px);}
.section-num{
  display:inline-block;margin-bottom:14px;
  font-family:var(--font-mono);font-size:12.5px;font-weight:700;letter-spacing:.2em;
  color:var(--violet);background:var(--ink-2);
  border:2px solid var(--line);padding:3px 9px;
}
.section--alt .section-num{background:var(--ink);}
.section-title{
  font-size:clamp(32px,4vw,46px);font-weight:900;
  letter-spacing:-.02em;line-height:1.12;color:var(--paper);
}
.section-title em{font-style:normal;color:var(--cyan);}
.section-lede{margin-top:14px;max-width:38em;font-size:16.5px;line-height:1.8;color:var(--muted);}
.eyebrow{font-family:var(--font-mono);font-size:12px;letter-spacing:.2em;text-transform:uppercase;color:var(--cyan);}
.lede{max-width:34em;font-size:clamp(17px,1.6vw,20px);line-height:1.75;color:var(--muted);}

/* 网格 */
.grid{display:grid;gap:var(--gap);}
.grid--halves{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));}
.grid--thirds{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));}
.grid--quarters{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));}
.split{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:clamp(24px,4vw,56px);align-items:start;}

/* 面板 / 卡片 */
.panel{background:var(--ink-2);border:2px solid var(--line);padding:clamp(20px,3vw,32px);}
.panel--violet{border-left:6px solid var(--violet);}
.panel--cyan{border-left:6px solid var(--cyan);}
.panel--orange{border-left:6px solid var(--orange);}
.card{
  position:relative;
  background:var(--ink-2);border:2px solid var(--line);
  padding:clamp(18px,2.6vw,28px);
  box-shadow:var(--shadow-hard);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s;
}
.card:hover{transform:translate(-3px,-3px);box-shadow:9px 9px 0 var(--line);border-color:var(--violet);}
.divider{height:2px;border:0;margin:0;background:var(--line);}

/* 数据 */
.stat{display:grid;gap:4px;}
.stat__value{
  font-family:var(--font-mono);font-weight:700;
  font-size:clamp(28px,3.6vw,46px);line-height:1;letter-spacing:-.02em;
  color:var(--cyan);
}
.stat__value--violet{color:var(--violet);}
.stat__value--orange{color:var(--orange);}
.stat__label{font-size:13px;letter-spacing:.04em;color:var(--muted);}

/* 标签 */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 9px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;
  color:var(--muted);background:var(--ink-2);border:2px solid var(--line);
}
.tag--cyan{color:var(--cyan);border-color:rgba(43,227,214,.5);}
.tag--orange{color:var(--orange);border-color:rgba(255,122,47,.5);}
.tag--green{color:var(--green);border-color:rgba(56,224,139,.5);}
.tag--red{color:var(--red);border-color:rgba(255,77,109,.5);}

/* 目录索引 */
.index-list{border-top:2px solid var(--line);counter-reset:idx;}
.index-item{counter-increment:idx;border-bottom:2px solid var(--line);}
.index-link{
  display:grid;grid-template-columns:auto minmax(0,1fr) auto;
  align-items:center;gap:16px;
  padding:18px 12px;
  color:var(--paper);
  transition:background-color .18s,color .18s;
}
.index-link::before{
  content:counter(idx,decimal-leading-zero);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--violet);
}
.index-link:hover{background:rgba(138,92,255,.12);color:var(--cyan);}
.index-link span:last-child{font-family:var(--font-mono);font-size:12px;color:var(--muted);}

/* 分段切换 */
.tabs{display:block;}
.tabs__list{position:relative;display:flex;flex-wrap:wrap;border-bottom:2px solid var(--line);}
.tabs__tab{
  padding:12px 18px;cursor:pointer;
  font-size:15px;font-weight:600;letter-spacing:.02em;color:var(--muted);
  border:0;background:none;
  transition:color .18s,background-color .18s;
}
.tabs__tab:hover{color:var(--paper);background:rgba(138,92,255,.1);}
.tabs__tab[aria-selected="true"]{color:var(--cyan);background:rgba(43,227,214,.08);}
.tabs__indicator{position:absolute;left:0;bottom:-2px;height:2px;width:0;background:var(--cyan);transition:transform .2s var(--ease),width .2s var(--ease);}
.tabs__panel{padding-top:clamp(18px,3vw,28px);}
.tabs__panel[hidden]{display:none;}

/* 步骤 */
.steps{display:grid;counter-reset:step;}
.steps > li{
  counter-increment:step;
  display:grid;grid-template-columns:auto minmax(0,1fr);
  gap:16px;padding:18px 0;border-bottom:2px solid var(--line);
}
.steps > li::before{
  content:counter(step,decimal-leading-zero);
  align-self:start;padding:2px 8px;
  font-family:var(--font-mono);font-size:13px;color:var(--cyan);
  border:2px solid var(--line);
}

/* 正文 */
.prose{max-width:38em;font-size:16.5px;line-height:1.8;color:var(--paper);}
.prose > * + *{margin-top:1.05em;}
.prose h2{font-size:clamp(24px,3vw,32px);font-weight:900;letter-spacing:-.01em;margin-top:1.8em;}
.prose h3{font-size:20px;font-weight:700;margin-top:1.6em;}
.prose ul{list-style:square;padding-left:1.3em;}
.prose li{margin-top:.5em;}
.prose a{color:var(--cyan);text-decoration:underline;text-underline-offset:3px;}
.prose strong{color:#fff;font-weight:700;}

/* 面包屑 */
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;color:var(--muted);
}
.crumbs a{color:var(--muted);}
.crumbs a:hover{color:var(--cyan);}
.crumbs span[aria-hidden]{color:var(--line);}

/* 图片容器 */
.media-frame{
  position:relative;overflow:hidden;
  background:var(--ink-2);
  border:2px solid var(--line);
  box-shadow:var(--shadow-hard);
}
.media-frame > img,.media-frame > svg,.media-frame > video{width:100%;height:100%;object-fit:cover;}
.media-frame--16-9{aspect-ratio:16 / 9;}
.media-frame--4-3{aspect-ratio:4 / 3;}
.media-frame--1-1{aspect-ratio:1 / 1;}
.media-frame--wide{aspect-ratio:21 / 9;}
.media-frame__cap{
  position:absolute;left:0;bottom:0;
  padding:6px 10px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em;
  color:var(--paper);background:rgba(7,8,15,.82);
  border-top:2px solid var(--line);border-right:2px solid var(--line);
}
.media-grid{display:grid;gap:clamp(12px,2vw,20px);grid-template-columns:repeat(auto-fit,minmax(240px,1fr));}

/* ---------- 动效 ---------- */
[data-reveal]{opacity:0;transform:translateY(24px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
[data-reveal].is-visible{opacity:1;transform:none;}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1080px){
  .footer-grid{grid-template-columns:1fr 1fr;}
  .footer-brand{grid-column:1 / -1;}
}
@media (max-width:1024px){
  .masthead__line{display:none;}
}
@media (max-width:900px){
  .nav-toggle{display:inline-flex;}
  .site-nav{max-height:0;overflow:hidden;border-bottom-color:transparent;}
  .site-nav[data-open="true"]{max-height:600px;border-bottom-color:var(--line);}
  .site-nav__inner{display:block;padding-block:8px 18px;}
  .nav-list{display:block;}
  .nav-list li{display:block;}
  .nav-link{display:flex;width:100%;padding:13px 4px;font-size:16px;border-bottom:1px solid rgba(42,46,68,.7);}
  .nav-link::after{display:none;}
  .nav-link[aria-current="page"]{padding-left:10px;border-left:3px solid var(--cyan);}
  .site-nav__meta{display:none;}
  .split{grid-template-columns:minmax(0,1fr);}
  .footer-dock{
    display:block;position:fixed;left:0;right:0;bottom:0;z-index:90;
    background:rgba(7,8,15,.96);
    border-top:2px solid var(--line);
    backdrop-filter:blur(10px);
  }
  .dock-list{display:flex;overflow-x:auto;padding:0 6px calc(4px + env(safe-area-inset-bottom));scrollbar-width:none;}
  .dock-list::-webkit-scrollbar{display:none;}
  .dock-link{
    display:flex;align-items:center;justify-content:center;white-space:nowrap;
    padding:13px 14px;font-size:13px;font-weight:500;color:var(--muted);
  }
  .dock-link:hover{color:var(--paper);}
  .dock-link[aria-current="page"]{color:var(--cyan);}
  body{padding-bottom:64px;}
}
@media (max-width:560px){
  .brand__text em{display:none;}
  .nav-toggle__label{display:none;}
  .btn{padding:10px 14px;font-size:14px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-base__tip{margin-left:0;}
  .index-link{grid-template-columns:auto minmax(0,1fr);}
  .index-link span:last-child{display:none;}
}

/* ---------- 降低动效偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal]{opacity:1 !important;transform:none !important;}
  .scroll-progress{display:none;}
}