/* =========================================================
   鼎盛游艺 · Site Kit — /assets/site.css
   夜幕游艺厅：墨绿基底 / 鎏金锚点 / 暗紫斜切 / 霓虹青焦点
   ========================================================= */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:96px}
body,h1,h2,h3,h4,h5,p,figure,blockquote,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
img,picture,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit}

/* ---------- 2. Tokens ---------- */
:root{
  --ink:#0B1F1A;
  --ink-deep:#050807;
  --panel:#12332B;
  --gold:#D6A54A;
  --gold-soft:#F0D9A6;
  --violet:#2A1638;
  --cyan:#47E0D2;
  --paper:#F5F2EA;
  --muted:#8FA79E;

  --line:rgba(214,165,74,.20);
  --line-strong:rgba(214,165,74,.42);
  --hairline:rgba(245,242,234,.09);
  --shadow:0 18px 42px -26px rgba(5,8,7,.95);
  --shadow-lift:0 26px 56px -30px rgba(5,8,7,1);

  --font-cn:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-en:"Space Grotesk","Archivo","Helvetica Neue",Arial,sans-serif;
  --font-body:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,serif;
  --font-ui:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;

  --shell-max:1240px;
  --pad:clamp(18px,4vw,48px);
  --radius:2px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 3. Base ---------- */
body{
  min-height:100vh;
  overflow-x:hidden;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:clamp(16px,1.05vw,17.5px);
  line-height:1.75;
  background:
    radial-gradient(1200px 640px at 86% -8%, rgba(42,22,56,.55), transparent 62%),
    radial-gradient(900px 520px at -10% 10%, rgba(214,165,74,.07), transparent 64%),
    var(--ink);
  background-attachment:fixed;
}
::selection{background:var(--gold);color:var(--ink)}
#main-content{display:block;min-height:60vh}

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

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
}

/* ---------- 4. Layout shell ---------- */
.shell{
  width:100%;
  max-width:var(--shell-max);
  margin-inline:auto;
  padding-inline:var(--pad);
}

/* ---------- 5. Skip link ---------- */
.skip-link{
  position:absolute;
  left:var(--pad);
  top:-120px;
  z-index:220;
  padding:10px 18px;
  border-radius:var(--radius);
  background:var(--gold);
  color:var(--ink);
  font-family:var(--font-ui);
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  text-decoration:none;
  transition:top .22s var(--ease);
}
.skip-link:focus{top:14px}

/* ---------- 6. Header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(11,31,26,.92);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}

.header-top{border-bottom:1px solid var(--hairline)}
.header-top__inner{
  display:flex;
  align-items:center;
  gap:clamp(14px,2.4vw,32px);
  min-height:74px;
  padding-block:10px;
  transition:min-height .28s var(--ease),padding .28s var(--ease);
}
.site-header[data-condensed] .header-top__inner{min-height:56px;padding-block:6px}

.header-top__note{
  flex:1 1 auto;
  min-width:0;
  font-family:var(--font-ui);
  font-size:12.5px;
  letter-spacing:.1em;
  color:var(--muted);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.site-header[data-condensed] .header-top__note{display:none}

.header-top__actions{
  display:flex;
  align-items:center;
  gap:12px;
  margin-left:auto;
  flex:none;
}
.header-mail{
  font-family:var(--font-ui);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--muted);
  text-decoration:none;
  white-space:nowrap;
  padding-bottom:2px;
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.header-mail:hover{color:var(--gold-soft);border-bottom-color:var(--line-strong)}

/* 品牌署名块 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:none;
  text-decoration:none;
  color:inherit;
}
.brand__mark{
  position:relative;
  width:26px;
  height:26px;
  flex:none;
  transform:rotate(45deg);
  border:1px solid var(--gold);
  background:linear-gradient(135deg,rgba(214,165,74,.42),rgba(214,165,74,0) 62%);
  transition:transform .4s var(--ease),border-color .25s var(--ease);
}
.brand__mark::after{
  content:"";
  position:absolute;
  inset:6px;
  background:var(--gold-soft);
  opacity:.85;
}
.brand:hover .brand__mark{transform:rotate(135deg);border-color:var(--gold-soft)}
.brand__text{display:flex;flex-direction:column;line-height:1.1}
.brand__name{
  font-family:var(--font-cn);
  font-weight:900;
  font-size:19px;
  letter-spacing:-.02em;
  color:var(--paper);
}
.brand__note{
  margin-top:4px;
  font-family:var(--font-en);
  font-size:10px;
  font-weight:600;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--muted);
}

/* 移动菜单按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 13px;
  border:1px solid var(--line-strong);
  border-radius:var(--radius);
  color:var(--gold-soft);
  background:rgba(18,51,43,.6);
  transition:border-color .2s var(--ease),color .2s var(--ease),background-color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--gold);background:rgba(214,165,74,.12)}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:16px;
  height:10px;
  flex:none;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  height:1px;
  background:currentColor;
  transition:transform .24s var(--ease),top .24s var(--ease),bottom .24s var(--ease);
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{bottom:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:50%;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{bottom:50%;transform:rotate(-45deg)}
.nav-toggle__label{
  font-family:var(--font-en);
  font-size:11px;
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
}

/* 下层导航条 */
.header-bar{
  border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,rgba(18,51,43,.55),rgba(18,51,43,0));
}
.header-bar__inner{display:flex;align-items:center}

.nav{width:100%}
.nav__list{display:flex;flex-wrap:wrap;align-items:stretch;gap:0}
.nav__item{position:relative}
.nav__link{
  position:relative;
  display:block;
  padding:15px 26px 15px 20px;
  font-family:var(--font-ui);
  font-size:13.5px;
  font-weight:500;
  letter-spacing:.1em;
  color:var(--paper);
  text-decoration:none;
  border-bottom:2px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}
.nav__link::after{
  content:"";
  position:absolute;
  right:12px;
  top:50%;
  width:5px;
  height:5px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 9px rgba(71,224,210,.85);
  opacity:0;
  transform:translateY(-50%) scale(.3);
  transition:opacity .24s var(--ease),transform .24s var(--ease);
}
.nav__link:hover{color:var(--gold-soft);background:rgba(214,165,74,.07)}
.nav__link[aria-current="page"]{
  color:var(--gold-soft);
  border-bottom-color:var(--gold);
  background:rgba(214,165,74,.05);
}
.nav__link[aria-current="page"]::after{
  opacity:1;
  transform:translateY(-50%) scale(1);
}

/* ---------- 7. Footer ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,9vw,120px);
  border-top:1px solid var(--line-strong);
  background:linear-gradient(180deg,#0B1F1A 0%,#081814 58%,#050B09 100%);
  color:var(--paper);
}
.site-footer::before{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:-1px;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(214,165,74,.6),rgba(71,224,210,.35),transparent);
}

.footer__grid{
  display:grid;
  grid-template-columns:minmax(0,1.55fr) minmax(0,.9fr) minmax(0,1.25fr);
  gap:clamp(26px,4vw,64px);
  padding-top:clamp(44px,6vw,80px);
  padding-bottom:clamp(32px,4vw,52px);
}
.footer__col{min-width:0}

.footer__brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  color:inherit;
}
.footer__brand .brand__name{font-size:21px}
.footer__tagline{
  margin-top:18px;
  max-width:32ch;
  font-family:var(--font-body);
  font-size:14.5px;
  line-height:1.85;
  color:var(--muted);
}

.footer__title{
  margin:0 0 18px;
  font-family:var(--font-en);
  font-size:11px;
  font-weight:600;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--gold);
}

.footer__list{display:grid;gap:9px}
.footer__link{
  display:inline-block;
  font-family:var(--font-ui);
  font-size:14px;
  letter-spacing:.04em;
  color:var(--paper);
  text-decoration:none;
  padding-bottom:1px;
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer__link:hover{color:var(--gold-soft);border-bottom-color:var(--line-strong)}

.footer__contact{display:grid;gap:14px}
.footer__contact-item{display:grid;gap:3px}
.footer__label{
  font-family:var(--font-en);
  font-size:10px;
  font-weight:600;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--muted);
}
.footer__value{
  font-family:var(--font-ui);
  font-size:14px;
  line-height:1.7;
  color:var(--paper);
  word-break:break-word;
}

.footer__legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 26px;
  padding-block:20px 30px;
  border-top:1px solid var(--hairline);
  font-family:var(--font-ui);
  font-size:12px;
  letter-spacing:.07em;
  color:var(--muted);
}
.footer__legal-links{display:flex;flex-wrap:wrap;gap:8px 20px}
.footer__legal-link{
  color:var(--muted);
  text-decoration:none;
  padding-bottom:1px;
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer__legal-link:hover{color:var(--gold-soft);border-bottom-color:var(--line-strong)}
.footer__copy{margin:0}
.footer__icp{margin:0 0 0 auto;color:var(--muted)}

/* ---------- 8. Buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border:1px solid transparent;
  border-radius:var(--radius);
  font-family:var(--font-ui);
  font-size:13px;
  font-weight:600;
  letter-spacing:.1em;
  text-decoration:none;
  transition:background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.btn.btn--gold{background:var(--gold);color:var(--ink);border-color:var(--gold)}
.btn.btn--gold:hover{background:var(--gold-soft);border-color:var(--gold-soft);transform:translateY(-1px)}
.btn.btn--ghost{background:transparent;color:var(--gold-soft);border-color:var(--line-strong)}
.btn.btn--ghost:hover{border-color:var(--gold);background:rgba(214,165,74,.12)}
.btn.btn--sm{padding:8px 15px;font-size:12px;letter-spacing:.08em}

/* ---------- 9. Common content ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-en);
  font-size:11px;
  font-weight:600;
  letter-spacing:.28em;
  text-transform:uppercase;
  color:var(--gold);
}
.eyebrow::before{
  content:"";
  width:26px;
  height:1px;
  flex:none;
  background:var(--gold);
  opacity:.75;
}

.section{padding-block:clamp(44px,6vw,88px)}
.section--tight{padding-block:clamp(28px,4vw,52px)}

.section-title{
  margin:0 0 .6em;
  font-family:var(--font-cn);
  font-weight:900;
  font-size:clamp(26px,3.6vw,44px);
  line-height:1.1;
  letter-spacing:-.04em;
  color:var(--paper);
}

.prose{
  max-width:62ch;
  font-size:clamp(16px,1.05vw,17.5px);
  line-height:1.85;
  color:rgba(245,242,234,.86);
}
.prose p + p{margin-top:1em}
.prose strong{color:var(--gold-soft);font-weight:700}
.prose a{
  color:var(--gold-soft);
  text-decoration:underline;
  text-underline-offset:3px;
  text-decoration-color:var(--line-strong);
}
.prose a:hover{text-decoration-color:var(--gold)}

.grid{
  display:grid;
  gap:clamp(16px,2.4vw,28px);
  grid-template-columns:repeat(auto-fit,minmax(min(100%,250px),1fr));
}

.card{
  position:relative;
  padding:clamp(18px,2.4vw,28px);
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(160deg,rgba(18,51,43,.94),rgba(11,31,26,.94));
  box-shadow:var(--shadow);
  transition:border-color .26s var(--ease),transform .26s var(--ease),box-shadow .26s var(--ease);
}
.card:hover{
  border-color:var(--line-strong);
  transform:translateY(-2px);
  box-shadow:var(--shadow-lift);
}

.panel{
  position:relative;
  overflow:hidden;
  padding:clamp(20px,3vw,40px);
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:
    linear-gradient(158deg,rgba(42,22,56,.62) 0%,rgba(18,51,43,.92) 52%,rgba(11,31,26,.96) 100%);
  box-shadow:var(--shadow);
}
.panel::after{
  content:"";
  position:absolute;
  right:-40px;
  bottom:-40px;
  width:180px;
  height:180px;
  border:1px solid var(--line);
  transform:rotate(45deg);
  pointer-events:none;
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 11px;
  border:1px solid var(--line-strong);
  border-radius:999px;
  background:rgba(214,165,74,.09);
  font-family:var(--font-en);
  font-size:11px;
  font-weight:600;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--gold-soft);
}
.tag--live{
  color:var(--cyan);
  border-color:rgba(71,224,210,.45);
  background:rgba(71,224,210,.09);
}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-ui);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--muted);
}
.breadcrumb a{color:var(--muted);text-decoration:none;transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--gold-soft)}
.breadcrumb__sep{color:var(--line-strong)}
.breadcrumb [aria-current="page"]{color:var(--paper)}

.stack{display:grid;gap:clamp(14px,2vw,24px)}

.rule{
  height:1px;
  border:0;
  background:linear-gradient(90deg,var(--line-strong),transparent);
}

/* 图片容器基础规则 */
.media{
  position:relative;
  isolation:isolate;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(150deg,#12332B 0%,#2A1638 72%,#0B1F1A 100%);
}
.media img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .6s var(--ease);
}
.media:hover img{transform:scale(1.03)}
.media__placeholder{
  position:absolute;
  inset:0;
  display:grid;
  place-items:center;
  padding:18px;
  text-align:center;
  font-family:var(--font-en);
  font-size:10px;
  font-weight:600;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:rgba(143,167,158,.8);
}
.media__caption{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  padding:14px 16px;
  font-family:var(--font-ui);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--paper);
  background:linear-gradient(0deg,rgba(5,8,7,.9),rgba(5,8,7,0));
}
.media--21x9{aspect-ratio:21/9}
.media--16x9{aspect-ratio:16/9}
.media--4x3{aspect-ratio:4/3}
.media--4x5{aspect-ratio:4/5}
.media--1x1{aspect-ratio:1/1}

/* ---------- 10. Motion protocol ---------- */
.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  width:0;
  height:2px;
  z-index:210;
  pointer-events:none;
  background:linear-gradient(90deg,var(--cyan),var(--gold) 68%,var(--gold-soft));
  box-shadow:0 0 12px rgba(71,224,210,.45);
  transition:width .12s linear;
}

.js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .6s var(--ease),transform .6s var(--ease);
}
.js [data-reveal].is-visible{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  .scroll-progress{transition:none}
  .js [data-reveal]{opacity:1;transform:none;transition:none}
  .brand:hover .brand__mark{transform:rotate(45deg)}
  .card:hover,.btn:hover{transform:none}
  .media:hover img{transform:none}
}

/* ---------- 11. Responsive ---------- */
@media (max-width:1080px){
  .footer__grid{grid-template-columns:minmax(0,1.3fr) minmax(0,.8fr) minmax(0,1.1fr)}
}

@media (max-width:960px){
  .header-top__note{display:none}
  .nav-toggle{display:inline-flex}
  .header-bar{
    height:0;
    min-height:0;
    border-bottom:0;
    background:none;
    overflow:visible;
  }
  .header-bar__inner{height:0;min-height:0;padding-block:0}
  .nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    display:none;
    width:auto;
    border-bottom:1px solid var(--line-strong);
    background:linear-gradient(180deg,#12332B 0%,#0B1F1A 100%);
    box-shadow:0 26px 44px -22px rgba(5,8,7,.95);
    max-height:min(72vh,560px);
    overflow-y:auto;
  }
  .nav[data-open]{display:block}
  .nav__list{flex-direction:column;flex-wrap:nowrap}
  .nav__item{border-bottom:1px solid var(--hairline)}
  .nav__item:last-child{border-bottom:0}
  .nav__link{
    padding:15px var(--pad);
    border-bottom:0;
    border-left:2px solid transparent;
    font-size:15px;
  }
  .nav__link::after{right:var(--pad)}
  .nav__link[aria-current="page"]{
    border-bottom:0;
    border-left-color:var(--gold);
    background:rgba(214,165,74,.1);
  }
  .footer__grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(24px,4vw,40px)}
  .footer__col--brand{grid-column:1 / -1}
}

@media (max-width:720px){
  .header-mail{display:none}
  .header-top__actions{gap:8px}
  .brand__name{font-size:17px}
  .brand__note{letter-spacing:.16em}
}

@media (max-width:640px){
  .footer__grid{grid-template-columns:minmax(0,1fr)}
  .footer__legal{flex-direction:column;align-items:flex-start;gap:9px}
  .footer__icp{margin-left:0}
  .media--21x9{aspect-ratio:16/9}
  .nav-toggle__label{display:none}
}