/* ==========================================================
   盛大棋牌·段位站 — 共享样式 /assets/site.css
   夜间棋牌竞技场 · 粗野主义画册 · 左侧段位阶梯
   ========================================================== */

/* ---------- 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,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
input,select,textarea{font:inherit}
a{color:inherit;text-decoration:none}

/* ---------- tokens ---------- */
:root{
  --ink-deep:#07140F;
  --moss-panel:#12261D;
  --stone-edge:#2C3A35;
  --ivory-text:#EDE6D8;
  --lichen-muted:#9FB0A6;
  --dark-gold:#C9A227;
  --neon-cyan:#4FE3D2;
  --magenta-flare:#E2558C;
  --terracotta-mark:#C1663F;
  --rank-gradient:linear-gradient(135deg,#1F5C4A 0%,#C9A227 55%,#E2558C 100%);
  --line-thick:2px solid var(--stone-edge);
  --shadow-hard:8px 8px 0 0 var(--stone-edge);
  --shadow-hard-sm:4px 4px 0 0 var(--stone-edge);
  --shell:1240px;
  --gutter:clamp(18px,4.4vw,64px);
  --header-h:74px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-display:"Archivo Narrow","HarmonyOS Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","HarmonyOS Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
}

/* ---------- base ---------- */
body{
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--ivory-text);
  background-color:var(--ink-deep);
  background-image:
    radial-gradient(circle at 10% 6%,rgba(79,227,210,.07),transparent 44%),
    radial-gradient(circle at 92% 94%,rgba(226,85,140,.07),transparent 46%),
    repeating-linear-gradient(45deg,rgba(44,58,53,.45) 0 1px,transparent 1px 96px),
    repeating-linear-gradient(-45deg,rgba(44,58,53,.34) 0 1px,transparent 1px 96px);
  min-height:100vh;
  overflow-x:hidden;
  overflow-wrap:break-word;
}
body::after{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:radial-gradient(circle,rgba(159,176,166,.05) 1px,transparent 1px);
  background-size:14px 14px;opacity:.55;
}
h1,h2,h3,h4,h5{line-height:1.25;font-weight:400}
strong,b{font-weight:600;color:var(--ivory-text)}
::selection{background:var(--dark-gold);color:var(--ink-deep)}
:focus-visible{outline:2px solid var(--neon-cyan);outline-offset:3px;border-radius:2px}
.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}

.site-main{position:relative;z-index:1;display:block;outline:none}
#main-content{display:block}

/* ---------- layout ---------- */
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter);position:relative;z-index:1}
.shell--narrow{max-width:880px}
.section{padding-block:clamp(44px,6.5vw,104px);position:relative;z-index:1}
.section__head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:clamp(22px,3.2vw,52px)}
.grid{display:grid;gap:clamp(16px,2.2vw,32px)}
.grid--asym{grid-template-columns:minmax(0,4fr) minmax(0,8fr)}
.grid--halves{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--thirds{grid-template-columns:repeat(3,minmax(0,1fr))}
.stagger>*:nth-child(even){margin-top:clamp(20px,3.6vw,72px)}
.overlap-top{margin-top:calc(-1 * var(--header-h));padding-top:calc(var(--header-h) + clamp(20px,3.4vw,52px))}
.band{position:relative;z-index:1;padding-block:clamp(40px,6vw,88px)}
.band--moss{background-color:var(--moss-panel);border-block:var(--line-thick)}
.band--deep{background-color:rgba(7,20,15,.72)}
.band--gradient{background-image:var(--rank-gradient);background-size:100% 3px;background-repeat:no-repeat;background-position:top}

/* ---------- typography ---------- */
.display{
  font-family:var(--font-display);
  font-weight:300;
  font-size:clamp(44px,7vw,112px);
  line-height:.98;
  letter-spacing:.06em;
  color:var(--ivory-text);
  text-wrap:balance;
}
.display--sm{font-size:clamp(28px,4.4vw,60px)}
.lede{font-size:clamp(16px,1.4vw,19px);line-height:1.8;color:var(--lichen-muted);max-width:34em}
.prose{max-width:34em;color:var(--ivory-text)}
.prose p+p{margin-top:1.4em}
.prose h2,.prose h3{margin-top:2.2em;margin-bottom:.6em;font-family:var(--font-display);letter-spacing:.06em}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.index-label{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.22em;
  color:var(--lichen-muted);text-transform:uppercase;
}
.index-label::before{content:"";display:block;width:28px;height:2px;background:var(--dark-gold)}

/* ---------- components ---------- */
.panel{border:var(--line-thick);background-color:var(--moss-panel);padding:clamp(18px,2.2vw,32px)}
.panel--hard{box-shadow:var(--shadow-hard)}
.panel__title{font-family:var(--font-display);font-size:clamp(18px,1.8vw,24px);letter-spacing:.08em;color:var(--ivory-text);margin-bottom:10px}
.rank-bar{height:6px;width:100%;background:var(--rank-gradient)}
.hairline{height:1px;border:0;background:linear-gradient(90deg,var(--dark-gold),rgba(201,162,39,0))}

.chip{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border:1px solid var(--stone-edge);font-size:11px;letter-spacing:.16em;color:var(--lichen-muted);white-space:nowrap}
.chip--gold{border-color:rgba(201,162,39,.7);color:var(--dark-gold)}
.chip--cyan{border-color:rgba(79,227,210,.6);color:var(--neon-cyan)}
.chip--magenta{border-color:rgba(226,85,140,.6);color:var(--magenta-flare)}

.stat{display:flex;flex-direction:column;gap:4px}
.stat__value{font-family:var(--font-mono);font-size:clamp(26px,3.4vw,44px);line-height:1;color:var(--dark-gold)}
.stat__label{font-size:12px;letter-spacing:.2em;color:var(--lichen-muted)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border:2px solid var(--dark-gold);background-color:transparent;
  color:var(--dark-gold);font-size:13px;letter-spacing:.14em;line-height:1;white-space:nowrap;
  transition:background-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.btn:hover,.btn:focus-visible{background-color:var(--dark-gold);color:var(--ink-deep);transform:translateY(-2px);box-shadow:var(--shadow-hard-sm)}
.btn--gold{border-color:var(--dark-gold);color:var(--dark-gold)}
.btn--cyan{border-color:var(--neon-cyan);color:var(--neon-cyan)}
.btn--cyan:hover,.btn--cyan:focus-visible{background-color:var(--neon-cyan);color:var(--ink-deep)}
.btn--ghost{border-color:var(--stone-edge);color:var(--ivory-text)}
.btn--ghost:hover,.btn--ghost:focus-visible{background-color:var(--moss-panel);border-color:var(--ivory-text);color:var(--ivory-text)}

.crumbs{padding-block:22px 0;position:relative;z-index:1}
.crumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;color:var(--lichen-muted)}
.crumbs__list li{display:flex;align-items:center;gap:8px}
.crumbs__list li+li::before{content:"/";color:var(--stone-edge)}
.crumbs__link{color:var(--lichen-muted);transition:color .2s var(--ease)}
.crumbs__link:hover{color:var(--neon-cyan)}
.crumbs__current{color:var(--ivory-text)}

.figure{position:relative;border:var(--line-thick);background-color:var(--moss-panel);overflow:hidden}
.figure__frame{
  position:relative;aspect-ratio:4/3;
  background-image:linear-gradient(135deg,rgba(31,92,74,.42),rgba(7,20,15,.92) 55%,rgba(226,85,140,.26));
}
.figure--wide .figure__frame{aspect-ratio:16/9}
.figure--tall .figure__frame{aspect-ratio:3/4}
.figure__media{width:100%;height:100%;object-fit:cover}
.figure__caption{padding:12px 16px;border-top:1px solid var(--stone-edge);background-color:rgba(7,20,15,.6);font-size:12px;letter-spacing:.08em;color:var(--lichen-muted)}
.figure__badge{position:absolute;top:12px;left:12px;z-index:2}

.ladder{display:flex;flex-direction:column;gap:8px}
.ladder__node{
  display:flex;align-items:center;gap:10px;width:100%;
  padding:10px 12px;border:2px solid transparent;background-color:transparent;
  color:var(--lichen-muted);font-size:13px;letter-spacing:.14em;text-align:left;
  transition:color .24s var(--ease),border-color .24s var(--ease),background-color .24s var(--ease),box-shadow .24s var(--ease);
}
.ladder__node:hover{border-color:var(--stone-edge);color:var(--ivory-text)}
.ladder__mark{flex:0 0 auto;width:8px;height:8px;background-color:var(--stone-edge);transform:rotate(45deg);transition:background-color .24s var(--ease)}
.ladder__label{flex:1 1 auto;min-width:0}
.ladder__count{font-family:var(--font-mono);font-size:11px;opacity:.75}
.ladder__node[data-active="true"]{background-color:var(--dark-gold);border-color:var(--dark-gold);color:var(--ink-deep);box-shadow:0 0 18px rgba(201,162,39,.35)}
.ladder__node[data-active="true"] .ladder__mark{background-color:var(--ink-deep)}
[data-ladder-panel][hidden]{display:none !important}

.tag-list{display:flex;flex-wrap:wrap;gap:10px}
.tag{
  padding:6px 12px;border:1px solid var(--stone-edge);background-color:transparent;
  color:var(--lichen-muted);font-size:12px;letter-spacing:.14em;
  transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}
.tag:hover{border-color:var(--neon-cyan);color:var(--neon-cyan)}
.tag[aria-pressed="true"],.tag[data-active="true"]{background-color:var(--neon-cyan);border-color:var(--neon-cyan);color:var(--ink-deep)}

.segmented{display:inline-flex;border:2px solid var(--stone-edge);background-color:rgba(7,20,15,.5)}
.segmented__btn{padding:9px 16px;font-size:12px;letter-spacing:.16em;color:var(--lichen-muted);transition:color .2s var(--ease),background-color .2s var(--ease)}
.segmented__btn+.segmented__btn{border-inline-start:2px solid var(--stone-edge)}
.segmented__btn[aria-selected="true"],.segmented__btn[data-active="true"]{background-color:var(--dark-gold);color:var(--ink-deep)}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  min-height:var(--header-h);
  border-bottom:1px solid transparent;
  transition:background-color .32s var(--ease),border-color .32s var(--ease),backdrop-filter .32s var(--ease);
}
.site-header::before{
  content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background-image:linear-gradient(180deg,rgba(7,20,15,.94),rgba(7,20,15,0));
  transition:opacity .32s var(--ease);
}
.site-header[data-scrolled="true"]{background-color:rgba(18,38,29,.95);border-bottom-color:rgba(201,162,39,.55);backdrop-filter:blur(8px)}
.site-header[data-scrolled="true"]::before{opacity:0}

.header__inner{
  position:relative;display:flex;align-items:center;gap:clamp(14px,2vw,32px);
  width:100%;max-width:var(--shell);margin-inline:auto;
  padding:clamp(10px,1.3vw,15px) var(--gutter);
}
.header__rule{
  position:absolute;left:0;right:0;bottom:-1px;height:1px;opacity:0;
  background-image:linear-gradient(90deg,transparent,rgba(201,162,39,.75) 16%,rgba(201,162,39,.75) 84%,transparent);
  transition:opacity .32s var(--ease);
}
.site-header[data-scrolled="true"] .header__rule{opacity:1}

.skip-link{
  position:absolute;left:16px;top:-72px;z-index:140;
  padding:10px 18px;background-color:var(--dark-gold);color:var(--ink-deep);
  font-size:14px;letter-spacing:.08em;transition:top .2s var(--ease);
}
.skip-link:focus{top:12px}

.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.brand__mark{
  display:grid;place-items:center;width:40px;height:40px;
  border:2px solid var(--dark-gold);
  background-image:linear-gradient(135deg,rgba(31,92,74,.6),rgba(226,85,140,.3));
  box-shadow:inset 0 0 0 1px rgba(7,20,15,.7);
}
.brand__mark-glyph{font-size:16px;line-height:1;color:var(--dark-gold);letter-spacing:0}
.brand__text{display:flex;flex-direction:column;gap:2px;line-height:1.25}
.brand__name{font-family:var(--font-display);font-size:clamp(15px,1.4vw,18px);letter-spacing:.12em;color:var(--ivory-text)}
.brand__line{font-size:11px;letter-spacing:.2em;color:var(--lichen-muted)}

.primary-nav{display:flex;align-items:center;justify-content:flex-end;gap:clamp(14px,1.8vw,30px);flex:1 1 auto;min-width:0}
.primary-nav__list{display:flex;align-items:center;gap:clamp(6px,1.1vw,18px)}
.primary-nav__item{display:flex}
.nav-link{
  position:relative;display:inline-flex;align-items:baseline;gap:6px;
  padding:8px 6px;font-size:14px;letter-spacing:.08em;color:var(--ivory-text);
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.nav-link__num{font-size:10px;letter-spacing:.1em;color:var(--lichen-muted);transition:color .2s var(--ease)}
.nav-link__label{white-space:nowrap}
.nav-link::after{
  content:"";position:absolute;left:6px;right:6px;bottom:2px;height:2px;
  background-color:var(--dark-gold);transform:scaleX(0);transform-origin:left;
  transition:transform .24s var(--ease),background-color .24s var(--ease);
}
.nav-link:hover{color:var(--dark-gold);transform:translateY(-2px)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--dark-gold)}
.nav-link[aria-current="page"]::after{transform:scaleX(1);background-color:var(--neon-cyan)}
.nav-link[aria-current="page"] .nav-link__num{color:var(--neon-cyan)}

.primary-nav__utility{display:flex;align-items:center;gap:16px;padding-inline-start:18px;border-inline-start:1px solid var(--stone-edge)}
.utility-link{font-size:11px;letter-spacing:.18em;color:var(--lichen-muted);white-space:nowrap;transition:color .2s var(--ease)}
.utility-link:hover{color:var(--neon-cyan)}

.header__aside{display:flex;align-items:center;gap:clamp(8px,1.2vw,16px);flex:0 0 auto}

.season-chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 12px;border:1px solid var(--stone-edge);background-color:rgba(18,38,29,.72);
  font-size:12px;letter-spacing:.1em;color:var(--ivory-text);
  transition:border-color .2s var(--ease),transform .2s var(--ease),color .2s var(--ease);
}
.season-chip:hover{border-color:var(--magenta-flare);color:var(--ivory-text);transform:translateY(-2px)}
.season-chip__pulse{flex:0 0 auto;width:7px;height:7px;background-color:var(--magenta-flare);transform:rotate(45deg);animation:chip-pulse 2.4s infinite}
.season-chip__main{white-space:nowrap}
.season-chip__alt{color:var(--magenta-flare);white-space:nowrap}
@keyframes chip-pulse{
  0%{box-shadow:0 0 0 0 rgba(226,85,140,.55)}
  70%{box-shadow:0 0 0 8px rgba(226,85,140,0)}
  100%{box-shadow:0 0 0 0 rgba(226,85,140,0)}
}

.nav-toggle{display:none;align-items:center;gap:8px;padding:9px 11px;border:2px solid var(--stone-edge);color:var(--ivory-text);font-size:12px;letter-spacing:.16em;transition:border-color .2s var(--ease)}
.nav-toggle:hover{border-color:var(--dark-gold)}
.nav-toggle__bars{position:relative;display:block;width:18px;height:2px;background-color:currentColor;transition:background-color .2s var(--ease)}
.nav-toggle__bars::before,.nav-toggle__bars::after{content:"";position:absolute;left:0;width:18px;height:2px;background-color:currentColor;transition:transform .2s var(--ease)}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background-color:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg)}
.nav-toggle__text{white-space:nowrap}

/* ---------- footer ---------- */
.site-footer{
  position:relative;z-index:1;margin-top:clamp(48px,7vw,120px);
  border-top:1px solid rgba(201,162,39,.5);
  background-color:var(--ink-deep);
  background-image:linear-gradient(180deg,rgba(18,38,29,.92),rgba(7,20,15,1) 62%);
  color:var(--lichen-muted);
}
.footer__inner{
  display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,2fr) minmax(0,1.4fr);
  gap:clamp(24px,3.4vw,56px);
  width:100%;max-width:var(--shell);margin-inline:auto;
  padding:clamp(36px,5vw,72px) var(--gutter) clamp(24px,3vw,40px);
}
.footer__brand-name{font-family:var(--font-display);font-size:clamp(17px,1.7vw,22px);letter-spacing:.1em;color:var(--ivory-text)}
.footer__brand-line{margin-top:8px;font-size:12px;letter-spacing:.22em;color:var(--dark-gold)}
.footer__brand-note{margin-top:14px;font-size:13px;line-height:1.8;max-width:30em}
.footer__nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(16px,2.4vw,32px)}
.footer__col{min-width:0}
.footer__col-title{margin-bottom:14px;padding-bottom:8px;border-bottom:1px solid var(--stone-edge);font-size:12px;letter-spacing:.22em;color:var(--ivory-text)}
.footer__list{display:flex;flex-direction:column;gap:10px}
.footer__link{font-size:13.5px;letter-spacing:.06em;color:var(--lichen-muted);transition:color .2s var(--ease)}
.footer__link:hover{color:var(--neon-cyan)}
.footer__contact{min-width:0}
.footer__contact-list{display:flex;flex-direction:column;gap:10px}
.footer__contact-list li{display:grid;grid-template-columns:52px minmax(0,1fr);gap:10px;align-items:baseline}
.footer__contact-key{font-size:10px;letter-spacing:.18em;color:var(--dark-gold)}
.footer__contact-value{font-size:13.5px;color:var(--ivory-text);word-break:break-word}
.footer__contact-note{margin-top:14px;font-size:12px;line-height:1.75}
.footer__legal{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 24px;
  width:100%;max-width:var(--shell);margin-inline:auto;
  padding:18px var(--gutter) clamp(24px,3vw,40px);
  border-top:1px solid var(--stone-edge);
  font-size:12px;letter-spacing:.08em;
}
.footer__legal-icp{font-family:var(--font-mono);color:var(--lichen-muted)}
.footer__legal-note{flex:1 1 320px;color:var(--lichen-muted)}
.footer__legal-copy{margin-inline-start:auto;font-family:var(--font-mono);color:var(--dark-gold)}

/* ---------- motion ---------- */
[data-reveal]{
  opacity:0;transform:translateY(16px);
  transition:opacity .42s var(--ease),transform .42s var(--ease);
  transition-delay:var(--reveal-delay,0ms);
  will-change:opacity,transform;
}
[data-reveal].is-visible{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1180px){
  .primary-nav__utility{display:none}
}
@media (max-width:1080px){
  .footer__inner{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .footer__contact{grid-column:1 / -1}
}
@media (max-width:980px){
  :root{--header-h:66px}
  .nav-toggle{display:inline-flex}
  .header__cta{display:none}
  .brand__line{display:none}
  .primary-nav{
    position:absolute;left:0;right:0;top:100%;
    display:block;margin:0;
    padding:10px var(--gutter) 26px;
    max-height:calc(100vh - 66px);overflow-y:auto;
    background-color:rgba(18,38,29,.98);
    border-top:2px solid var(--stone-edge);
    border-bottom:2px solid var(--dark-gold);
    box-shadow:0 18px 40px rgba(0,0,0,.55);
    opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:opacity .26s var(--ease),transform .26s var(--ease),visibility .26s var(--ease);
  }
  .primary-nav[data-open]{opacity:1;visibility:visible;transform:translateY(0)}
  .primary-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .nav-link{justify-content:space-between;align-items:center;padding:14px 4px;font-size:16px;border-bottom:1px solid var(--stone-edge)}
  .nav-link::after{display:none}
  .nav-link:hover{transform:none}
  .nav-link[aria-current="page"]{color:var(--neon-cyan)}
  .primary-nav__utility{display:flex;flex-direction:column;align-items:flex-start;gap:12px;margin-top:18px;padding:0;border:0}
  .utility-link{font-size:12px;letter-spacing:.2em}
  .season-chip{padding:6px 10px;font-size:11px}
}
@media (max-width:920px){
  .grid--asym,.grid--halves,.grid--thirds{grid-template-columns:minmax(0,1fr)}
  .stagger>*:nth-child(even){margin-top:0}
}
@media (max-width:720px){
  body{font-size:16px}
  .footer__inner{grid-template-columns:minmax(0,1fr);padding-bottom:28px}
  .footer__nav{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__legal-copy{margin-inline-start:0}
}
@media (max-width:640px){
  .season-chip__alt{display:none}
  .nav-toggle__text{display:none}
  .brand__mark{width:34px;height:34px}
  .brand__mark-glyph{font-size:14px}
  .section__head{margin-bottom:20px}
}

/* ---------- 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}
  [data-reveal]{opacity:1;transform:none}
  .season-chip__pulse{animation:none}
  .btn:hover,.btn:focus-visible,.nav-link:hover,.season-chip:hover,.ladder__node:hover{transform:none}
}