/* =========================================================
   7电子娱乐中心 — 全站共享样式 /assets/site.css
   深墨蓝机柜 · 炭黑面板 · 暖纸阅读区 · 青柠状态 · 信号橙入口
   ========================================================= */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:96px;
}
body{margin:0}
img,svg,video,canvas{display:block;max-width:100%;height:auto}
button,input,select,textarea{font:inherit;color:inherit;margin:0}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
p,h1,h2,h3,h4,h5,h6,figure,blockquote,dl,dd{margin:0}
h1,h2,h3,h4,h5,h6{
  font-family:var(--font-sans);
  font-weight:900;
  letter-spacing:-.03em;
  line-height:.98;
  text-wrap:balance;
}
p{text-wrap:pretty}

/* ---------- 2. Tokens ---------- */
:root{
  --ink:#0A101C;
  --panel:#141A24;
  --panel-deep:#0D1420;
  --paper:#E7DFCF;
  --paper-ink:#181712;
  --paper-white:#F6F1E6;
  --gray:#98A2AE;
  --lime:#B8F24B;
  --lime-soft:rgba(184,242,75,.14);
  --orange:#FF7A3D;
  --orange-soft:rgba(255,122,61,.14);
  --orange-ink:#1A0C04;
  --cyan:#46D3C0;
  --cyan-soft:rgba(70,211,192,.12);
  --slate:#263246;
  --mist:#5B6B80;

  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --r-lg:28px;
  --r-md:20px;
  --r-sm:14px;
  --pill:999px;

  --shell:1240px;
  --gutter:clamp(18px,4vw,56px);
  --header-h:72px;
  --ease:cubic-bezier(.4,0,.2,1);
}

/* ---------- 3. Base type ---------- */
body{
  background:var(--ink);
  color:var(--paper-white);
  font-family:var(--font-sans);
  font-weight:400;
  font-size:clamp(1rem,.95rem + .2vw,1.125rem);
  line-height:1.85;
  letter-spacing:.01em;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
::selection{background:var(--lime);color:var(--ink)}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px;border-radius:6px}

/* ---------- 4. Layout helpers ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.shell--narrow{max-width:860px}
.band{
  border-block:1px solid var(--slate);
  background:linear-gradient(90deg,rgba(184,242,75,.06),transparent 60%),var(--panel-deep);
  padding-block:clamp(20px,3vw,36px);
}
.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;
}

/* ---------- 5. Text utilities ---------- */
.mono{
  font-family:var(--font-mono);
  font-size:.8rem;
  font-weight:500;
  letter-spacing:.08em;
  color:var(--gray);
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:.72rem;
  font-weight:500;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--lime);
}
.eyebrow::before{
  content:"";
  width:8px;height:8px;border-radius:50%;
  background:currentColor;
  box-shadow:0 0 12px currentColor;
  flex:none;
}

/* ---------- 6. Status light ---------- */
.status-dot{
  display:inline-block;
  width:7px;height:7px;
  border-radius:50%;
  background:var(--lime);
  box-shadow:0 0 0 3px rgba(184,242,75,.16),0 0 10px rgba(184,242,75,.7);
  animation:dotPulse 3.2s ease-in-out infinite;
  flex:none;
}
.status-dot--lime{background:var(--lime)}
.status-dot--orange{
  background:var(--orange);
  box-shadow:0 0 0 3px rgba(255,122,61,.16),0 0 10px rgba(255,122,61,.7);
}
@keyframes dotPulse{
  0%,100%{opacity:.5}
  50%{opacity:1}
}

/* ---------- 7. Buttons ---------- */
.btn{
  position:relative;
  z-index:0;
  overflow:hidden;
  isolation:isolate;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 22px;
  border-radius:var(--pill);
  border:1px solid transparent;
  font-family:var(--font-sans);
  font-weight:700;
  font-size:.94rem;
  line-height:1;
  letter-spacing:0;
  white-space:nowrap;
  cursor:pointer;
  transition:color .25s var(--ease),background-color .25s var(--ease),border-color .25s var(--ease),transform .22s var(--ease);
}
.btn::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:-1;
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .34s var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn:hover::before,.btn:focus-visible::before{transform:scaleX(1)}
.btn:active{transform:translateY(0)}

.btn-lime{background:var(--lime);color:var(--ink)}
.btn-lime::before{background:#D6FA86}

.btn-ghost{background:transparent;color:var(--paper-white);border-color:var(--slate)}
.btn-ghost::before{background:var(--lime-soft)}
.btn-ghost:hover,.btn-ghost:focus-visible{color:var(--lime);border-color:rgba(184,242,75,.55)}

.btn-orange{background:var(--orange);color:var(--orange-ink)}
.btn-orange::before{background:#FF9560}

/* ---------- 8. Chips ---------- */
.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:6px 12px;
  border-radius:var(--pill);
  border:1px solid var(--slate);
  background:rgba(38,50,70,.6);
  color:var(--gray);
  font-family:var(--font-mono);
  font-size:.7rem;
  font-weight:500;
  letter-spacing:.08em;
  line-height:1.4;
}
.chip--lime{background:var(--lime-soft);color:var(--lime);border-color:rgba(184,242,75,.35)}
.chip--orange{background:var(--orange-soft);color:var(--orange);border-color:rgba(255,122,61,.35)}
.chip--cyan{background:var(--cyan-soft);color:var(--cyan);border-color:rgba(70,211,192,.32)}

/* ---------- 9. Cards & panels ---------- */
.card{
  position:relative;
  background:var(--panel);
  border:1px solid var(--slate);
  border-radius:var(--r-lg);
  padding:clamp(20px,2.4vw,32px);
}
.card--lime{
  border-color:rgba(184,242,75,.32);
  background:linear-gradient(160deg,rgba(184,242,75,.09),transparent 58%),var(--panel);
}
.card-title{
  font-size:clamp(1.15rem,1rem + .5vw,1.4rem);
  letter-spacing:-.02em;
  line-height:1.25;
  margin-bottom:.55em;
}
.paper-panel{
  background:var(--paper);
  color:var(--paper-ink);
  border-radius:var(--r-lg);
  padding:clamp(24px,3.6vw,56px);
}
.paper-panel h2,.paper-panel h3{color:#0F1622}
.paper-panel .mono{color:#5A5545}
.paper-panel a{text-decoration:underline;text-underline-offset:3px}

/* ---------- 10. Prose ---------- */
.prose p{margin-bottom:1.1em;max-width:64ch}
.prose p:last-child{margin-bottom:0}
.prose strong{font-weight:700;color:var(--paper-white)}
.paper-panel .prose strong{color:#0F1622}

/* ---------- 11. Chapter head ---------- */
.chapter-head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:clamp(10px,2vw,22px);
  margin-bottom:clamp(24px,3vw,40px);
}
.chapter-num{
  font-family:var(--font-mono);
  font-size:.8rem;
  font-weight:500;
  letter-spacing:.18em;
  color:var(--lime);
}
.chapter-title{font-size:clamp(1.8rem,3.4vw,3.2rem)}

/* ---------- 12. Breadcrumb ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.08em;
  color:var(--mist);
}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li + li::before{content:"/";color:var(--mist)}
.breadcrumb a{color:var(--gray);transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--cyan)}

/* ---------- 13. Media frame ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  isolation:isolate;
  aspect-ratio:16 / 10;
  border:1px solid var(--slate);
  border-radius:var(--r-lg);
  background:
    radial-gradient(120% 90% at 12% 8%,rgba(70,211,192,.18),transparent 58%),
    radial-gradient(90% 80% at 92% 92%,rgba(255,122,61,.14),transparent 56%),
    repeating-linear-gradient(0deg,rgba(152,162,174,.07) 0 1px,transparent 1px 7px),
    var(--panel-deep);
}
.media-frame img,.media-frame video,.media-frame picture{
  width:100%;height:100%;
  object-fit:cover;
  display:block;
}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame__scan{
  position:absolute;
  inset:0;
  z-index:1;
  pointer-events:none;
  opacity:.5;
  background:repeating-linear-gradient(0deg,rgba(10,16,28,.34) 0 2px,transparent 2px 5px);
}
.media-frame__tag{
  position:absolute;
  left:16px;
  bottom:16px;
  z-index:2;
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:6px 12px;
  border-radius:var(--pill);
  background:rgba(10,16,28,.82);
  border:1px solid rgba(184,242,75,.35);
  color:var(--lime);
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.1em;
  backdrop-filter:blur(6px);
}

/* ---------- 14. Reveal ---------- */
.has-js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .55s var(--ease),transform .55s var(--ease);
}
.has-js [data-reveal].is-visible{
  opacity:1;
  transform:none;
}

/* ---------- 15. Scroll progress ---------- */
.scroll-progress{
  position:absolute;
  left:0;
  bottom:0;
  z-index:2;
  height:2px;
  width:0;
  background:linear-gradient(90deg,var(--lime),var(--cyan));
  box-shadow:0 0 10px rgba(184,242,75,.5);
  transition:width .12s linear;
  pointer-events:none;
}

/* ---------- 16. Back to top ---------- */
.to-top{
  position:fixed;
  right:clamp(14px,3vw,32px);
  bottom:clamp(14px,3vw,32px);
  z-index:80;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:11px 18px;
  border-radius:var(--pill);
  border:1px solid rgba(184,242,75,.45);
  background:rgba(10,16,28,.92);
  color:var(--lime);
  font-family:var(--font-mono);
  font-size:.72rem;
  font-weight:500;
  letter-spacing:.12em;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s var(--ease),background-color .22s var(--ease),color .22s var(--ease);
  backdrop-filter:blur(8px);
}
.to-top[data-show="true"]{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--lime);color:var(--ink)}

/* ---------- 17. Skip link ---------- */
.skip-link{
  position:absolute;
  left:var(--gutter);
  top:-80px;
  z-index:200;
  padding:11px 20px;
  border-radius:0 0 14px 14px;
  background:var(--lime);
  color:var(--ink);
  font-weight:700;
  font-size:.9rem;
  transition:top .22s var(--ease);
}
.skip-link:focus{top:0}

/* ---------- 18. Header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  background:rgba(10,16,28,.93);
  border-bottom:1px solid var(--slate);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
}
.header-bar{
  display:flex;
  align-items:center;
  gap:clamp(12px,2vw,28px);
  width:100%;
  max-width:var(--shell);
  min-height:var(--header-h);
  margin-inline:auto;
  padding:10px var(--gutter);
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:11px;
  flex:none;
  padding:4px;
  border-radius:var(--r-sm);
}
.brand-mark{
  position:relative;
  display:grid;
  place-items:center;
  width:40px;
  height:40px;
  flex:none;
  border-radius:13px;
  border:1px solid var(--slate);
  background:linear-gradient(150deg,#1C2739,#0C131F);
  font-family:var(--font-mono);
  font-size:1.05rem;
  font-weight:700;
  color:var(--lime);
  line-height:1;
}
.brand-mark::after{
  content:"";
  position:absolute;
  top:6px;
  right:6px;
  width:5px;
  height:5px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 8px var(--cyan);
}
.brand-text{display:flex;flex-direction:column;gap:4px;min-width:0}
.brand-name{
  font-size:1.02rem;
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1;
  color:var(--paper-white);
  white-space:nowrap;
}
.brand-tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-family:var(--font-mono);
  font-size:.62rem;
  font-weight:500;
  letter-spacing:.13em;
  line-height:1;
  color:var(--gray);
  white-space:nowrap;
}

.site-nav{margin-left:auto}
.nav-list{display:flex;align-items:center;gap:2px;flex-wrap:wrap}
.nav-link{
  position:relative;
  z-index:0;
  isolation:isolate;
  display:inline-block;
  padding:9px 13px;
  border-radius:var(--pill);
  font-size:.9rem;
  font-weight:500;
  line-height:1.4;
  letter-spacing:.01em;
  color:var(--gray);
  white-space:nowrap;
  transition:color .25s var(--ease);
}
.nav-link::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:-1;
  border-radius:inherit;
  background:var(--slate);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .32s var(--ease);
}
.nav-link:hover,.nav-link:focus-visible{color:var(--paper-white)}
.nav-link:hover::before,.nav-link:focus-visible::before{transform:scaleX(1)}
.nav-link[aria-current="page"]{
  color:var(--lime);
  background:var(--lime-soft);
  box-shadow:inset 0 0 0 1px rgba(184,242,75,.42);
}
.nav-link[aria-current="page"]::before{display:none}

.header-tools{display:flex;align-items:center;gap:10px;flex:none}
.nav-cta{font-size:.88rem;padding:11px 18px}

.nav-toggle{
  display:none;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:4px;
  width:44px;
  height:44px;
  padding:0;
  border-radius:14px;
  border:1px solid var(--slate);
  background:rgba(20,26,36,.92);
  color:var(--paper-white);
  cursor:pointer;
  transition:border-color .22s var(--ease),color .22s var(--ease);
}
.nav-toggle span{
  display:block;
  width:18px;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:transform .26s var(--ease),opacity .2s var(--ease);
}
.nav-toggle:hover{border-color:rgba(184,242,75,.5);color:var(--lime)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- 19. Footer ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(64px,9vw,140px);
  border-top:1px solid var(--slate);
  background:linear-gradient(180deg,#0B1220 0%,#070C15 100%);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:linear-gradient(90deg,rgba(38,50,70,.55) 1px,transparent 1px);
  background-size:96px 100%;
  opacity:.4;
  -webkit-mask-image:linear-gradient(180deg,transparent,#000 22%,#000 78%,transparent);
  mask-image:linear-gradient(180deg,transparent,#000 22%,#000 78%,transparent);
}
.footer-console{
  position:relative;
  z-index:1;
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(44px,6vw,84px) var(--gutter) 26px;
}
.footer-head{
  display:grid;
  grid-template-columns:minmax(0,1fr) auto;
  gap:clamp(20px,4vw,48px);
  align-items:center;
  padding-bottom:clamp(26px,3.6vw,42px);
  border-bottom:1px solid var(--slate);
}
.footer-brand{min-width:0}
.footer-brand-line{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:clamp(1.05rem,1rem + .4vw,1.3rem);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.25;
  color:var(--paper-white);
}
.footer-summary{
  margin-top:10px;
  max-width:44ch;
  font-size:.94rem;
  line-height:1.75;
  color:var(--gray);
}
.footer-download{display:flex;flex-direction:column;align-items:flex-start;gap:9px}
.dl-pill{
  display:inline-flex;
  align-items:center;
  gap:12px;
  padding:15px 24px;
  border-radius:var(--pill);
  background:var(--orange);
  color:var(--orange-ink);
  font-weight:900;
  font-size:.98rem;
  letter-spacing:-.01em;
  line-height:1;
  transition:background-color .22s var(--ease),transform .22s var(--ease);
}
.dl-pill:hover{background:#FF9560;transform:translateY(-2px)}
.dl-pill__label{white-space:nowrap}
.dl-pill__arrow{font-family:var(--font-mono);font-size:1rem;line-height:1}
.dl-pill__note{
  padding-left:6px;
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.1em;
  color:var(--mist);
}
.footer-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(190px,1fr));
  gap:clamp(24px,4vw,48px);
  padding:clamp(30px,4vw,48px) 0;
}
.footer-col{min-width:0}
.footer-col-title{
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:.7rem;
  font-weight:500;
  letter-spacing:.2em;
  line-height:1.4;
  text-transform:uppercase;
  color:var(--lime);
}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-link{
  position:relative;
  display:inline-block;
  width:fit-content;
  font-size:.94rem;
  line-height:1.5;
  color:var(--gray);
  transition:color .22s var(--ease);
}
.footer-link::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-2px;
  width:100%;
  height:1px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .28s var(--ease);
}
.footer-link:hover,.footer-link:focus-visible{color:var(--cyan)}
.footer-link:hover::after,.footer-link:focus-visible::after{transform:scaleX(1)}
.footer-links--plain li{
  font-size:.9rem;
  line-height:1.7;
  color:var(--gray);
  word-break:break-word;
}
.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 28px;
  padding-top:22px;
  border-top:1px solid var(--slate);
  font-family:var(--font-mono);
  font-size:.72rem;
  font-weight:500;
  letter-spacing:.06em;
  color:var(--mist);
}

/* ---------- 20. Responsive ---------- */
@media (max-width:960px){
  .header-bar{flex-wrap:wrap;row-gap:10px;padding-block:10px}
  .header-tools{margin-left:auto}
  .nav-toggle{display:inline-flex}
  .site-nav{
    order:3;
    flex-basis:100%;
    width:100%;
    margin-left:0;
    margin-top:4px;
    padding-top:10px;
    border-top:1px solid var(--slate);
    display:none;
  }
  .site-nav[data-open="true"]{
    display:block;
    animation:navDrop .28s var(--ease) both;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-link{display:block;padding:12px 14px;font-size:1rem;border-radius:var(--r-sm)}
}
@keyframes navDrop{
  from{opacity:0;transform:translateY(-8px)}
  to{opacity:1;transform:none}
}

@media (max-width:760px){
  .footer-head{grid-template-columns:1fr;align-items:start}
  .footer-download{width:100%;align-items:stretch}
  .dl-pill{width:100%;justify-content:center}
  .dl-pill__note{padding-left:0;text-align:center}
  .footer-base{flex-direction:column;align-items:flex-start;gap:6px}
}

@media (max-width:420px){
  .brand-tag{display:none}
  .brand-mark{width:36px;height:36px;border-radius:11px}
  .nav-cta{font-size:.8rem;padding:10px 14px}
}

/* ---------- 21. 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;
  }
  .has-js [data-reveal]{opacity:1;transform:none}
  .status-dot{animation:none;opacity:.9}
  .btn:hover{transform:none}
  .dl-pill:hover{transform:none}
}