/* ==========================================================================
   爱游戏赛场 / 共享样式 site.css
   1 Reset · 2 Tokens · 3 中文排版 · 4 按钮 · 5 页头 · 6 页脚
   7 容器与栅格 · 8 基础组件 · 9 图片容器 · 10 动效 · 11 响应式
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h) + 16px);
}
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%}
img{height:auto}
button,input,select,textarea{font:inherit;color:inherit}
a{color:inherit}
table{border-collapse:collapse;width:100%}

/* ---------- 2. Tokens ---------- */
:root{
  /* 色彩 */
  --ink-900:#0E2A2E;
  --ink-800:#14403F;
  --line:#2A5B58;
  --ochre:#B33A1E;
  --ochre-lit:#D9563A;
  --neon:#4BE8B0;
  --paper:#F4EEE6;
  --mist:#9AA7A4;
  --charcoal:#22201E;
  --hair:#DCE7E3;

  --bg:var(--ink-900);
  --surface:var(--ink-800);
  --text:#D7DFDC;
  --text-dim:var(--mist);
  --text-strong:var(--paper);

  /* 字体 */
  --font-display:"PingFang SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"PingFang SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"IBM Plex Mono","JetBrains Mono","SFMono-Regular",Menlo,Consolas,monospace;

  /* 间距阶梯 */
  --sp-1:4px;
  --sp-2:8px;
  --sp-3:12px;
  --sp-4:16px;
  --sp-5:24px;
  --sp-6:36px;
  --sp-7:56px;
  --sp-8:88px;

  /* 骨架 */
  --gutter:clamp(16px,4vw,40px);
  --maxw:1320px;
  --header-h:clamp(88px,8.5vw,104px);
  --radius-pill:999px;
  --radius-lg:16px;
  --radius-md:10px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 3. 中文排版 ---------- */
body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--text);
  background:var(--bg);
  text-rendering:optimizeLegibility;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
p{max-width:38em}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.2;
  letter-spacing:-.01em;
  color:var(--text-strong);
}
a{text-decoration-thickness:1px;text-underline-offset:3px}

:focus-visible{
  outline:2px solid var(--neon);
  outline-offset:3px;
  border-radius:4px;
}
::selection{background:var(--neon);color:var(--ink-900)}

/* 排版工具类 */
.display{
  font-family:var(--font-display);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.05;
  font-size:clamp(28px,4.6vw,64px);
  color:var(--text-strong);
}
.lede{
  font-size:clamp(15px,1.6vw,18px);
  line-height:1.85;
  color:#C4D0CC;
  max-width:36em;
}
.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:600;
  letter-spacing:-.02em;
  color:var(--text-strong);
}
.label{
  display:inline-block;
  font-size:12px;
  font-weight:700;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--mist);
}
.rule{
  height:1px;
  border:0;
  margin-block:var(--sp-6);
  background:var(--line);
}
.section--paper{background:var(--paper);color:var(--charcoal)}
.section--paper h1,.section--paper h2,.section--paper h3,.section--paper h4{color:var(--charcoal)}
.section--paper p,.section--paper .lede{color:#4A4A46}
.section--paper .label{color:#6E7A77}
.section--paper .rule{background:var(--hair)}
.section--ink{background:var(--ink-800);color:var(--text)}

/* ---------- 4. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 24px;
  border-radius:var(--radius-pill);
  border:1px solid transparent;
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
  line-height:1.2;
  text-decoration:none;
  cursor:pointer;
  transition:background-color .2s var(--ease),color .2s var(--ease),
             border-color .2s var(--ease),transform .2s var(--ease);
}
.btn:active{transform:translateY(1px)}
.btn--primary{background:var(--ochre);color:var(--paper)}
.btn--primary:hover{background:var(--ochre-lit)}
.btn--neon{background:var(--neon);color:var(--ink-900)}
.btn--neon:hover{background:#6DF3C4}
.btn--ghost{background:transparent;color:var(--paper);border-color:var(--line)}
.btn--ghost:hover{border-color:var(--neon);color:var(--neon)}

/* ---------- 5. 页头 ---------- */
.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:300;
  padding:10px 20px;
  border-radius:var(--radius-pill);
  background:var(--neon);
  color:var(--ink-900);
  font-size:14px;
  font-weight:700;
  text-decoration:none;
  transform:translateY(-180%);
  transition:transform .22s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:translateY(0)}

.site-header{
  position:fixed;
  inset:0 0 auto 0;
  z-index:100;
  pointer-events:none;
}
.site-header a,
.site-header button,
.site-header .nav-island{pointer-events:auto}

.header-inner{
  position:relative;
  width:min(var(--maxw),calc(100% - 2 * var(--gutter)));
  margin-inline:auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:var(--sp-4);
  padding-block:clamp(14px,2.2vw,26px);
  transition:padding-block .3s var(--ease);
}
.site-header.is-scrolled .header-inner{padding-block:8px}

/* 品牌浮岛 */
.brand-island{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:8px 16px 8px 10px;
  border-radius:var(--radius-pill);
  background:rgba(14,42,46,.74);
  border:1px solid rgba(42,91,88,.9);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  box-shadow:0 6px 24px rgba(0,0,0,.3);
  text-decoration:none;
  color:var(--paper);
  transition:padding .3s var(--ease),border-color .25s var(--ease),background-color .25s var(--ease);
}
.brand-island:hover{border-color:var(--neon)}
.site-header.is-scrolled .brand-island{padding:6px 14px 6px 8px}

.brand-mark{
  position:relative;
  flex:none;
  width:26px;
  height:26px;
  border-radius:8px;
  background:linear-gradient(150deg,var(--ochre),var(--ochre-lit));
  box-shadow:inset 0 0 0 1px rgba(244,238,230,.22);
}
.brand-mark::after{
  content:"";
  position:absolute;
  inset:8px;
  border-radius:50%;
  background:var(--neon);
  box-shadow:0 0 10px rgba(75,232,176,.65);
}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-name{font-size:15px;font-weight:800;letter-spacing:.02em;color:var(--paper)}
.brand-sub{font-size:10px;font-weight:600;letter-spacing:.18em;color:var(--mist);margin-top:3px}

/* 移动端菜单按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 15px;
  border-radius:var(--radius-pill);
  background:rgba(14,42,46,.86);
  border:1px solid var(--line);
  color:var(--paper);
  cursor:pointer;
  transition:border-color .2s var(--ease),background-color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--neon)}
.nav-toggle-label{
  display:inline-block;
  font-size:12px;
  font-weight:600;
  letter-spacing:.16em;
  line-height:1;
}
.nav-toggle-bars{position:relative;display:block;width:16px;height:12px}
.nav-toggle-bars i{
  position:absolute;
  left:0;
  width:100%;
  height:2px;
  border-radius:2px;
  background:var(--neon);
  transition:transform .24s var(--ease),opacity .24s var(--ease),top .24s var(--ease);
}
.nav-toggle-bars i:nth-child(1){top:0}
.nav-toggle-bars i:nth-child(2){top:5px}
.nav-toggle-bars i:nth-child(3){top:10px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(1){top:5px;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(3){top:5px;transform:rotate(-45deg)}

/* 栏目浮岛 */
.nav-island{
  display:flex;
  align-items:center;
  gap:4px;
  padding:5px;
  border-radius:var(--radius-pill);
  background:rgba(14,42,46,.8);
  border:1px solid rgba(42,91,88,.9);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  box-shadow:0 8px 30px rgba(0,0,0,.34);
  transition:padding .3s var(--ease);
}
.site-header.is-scrolled .nav-island{padding:3px;background:rgba(14,42,46,.92)}

.nav-list{display:flex;align-items:center;gap:2px}
.nav-list a{
  display:block;
  padding:8px 13px;
  border-radius:var(--radius-pill);
  font-size:13px;
  font-weight:500;
  line-height:1.4;
  white-space:nowrap;
  text-decoration:none;
  color:#B9C6C2;
  transition:color .18s var(--ease),background-color .18s var(--ease);
}
.nav-list a:hover{color:var(--paper);background:rgba(42,91,88,.6)}
.nav-list a[aria-current="page"]{
  background:var(--neon);
  color:var(--ink-900);
  font-weight:700;
}
.site-header.is-scrolled .nav-list a{padding:7px 11px}

.nav-quick{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:8px 15px;
  border-radius:var(--radius-pill);
  background:var(--ochre);
  color:var(--paper);
  font-size:13px;
  font-weight:700;
  line-height:1.4;
  letter-spacing:.02em;
  white-space:nowrap;
  text-decoration:none;
  transition:background-color .18s var(--ease);
}
.nav-quick::after{content:"›";font-size:15px;line-height:1;transform:translateY(-1px)}
.nav-quick:hover{background:var(--ochre-lit)}

/* 阅读进度 */
.read-progress{
  position:fixed;
  top:0;
  left:0;
  width:100%;
  height:2px;
  z-index:120;
  pointer-events:none;
  background:rgba(42,91,88,.28);
}
.read-progress [data-progress-bar]{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--ochre),var(--ochre-lit) 40%,var(--neon));
  transition:width .12s linear;
}

/* ---------- 6. 页脚 ---------- */
.site-footer{
  position:relative;
  overflow:hidden;
  background:var(--ink-900);
  color:var(--mist);
  padding-top:clamp(44px,6vw,80px);
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--ochre) 30%,var(--neon) 70%,transparent);
  opacity:.7;
}
.site-footer::after{
  content:"";
  position:absolute;
  right:-12%;
  bottom:-58%;
  width:58vw;
  height:58vw;
  max-width:760px;
  max-height:760px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(75,232,176,.08),transparent 62%);
  pointer-events:none;
}
.footer-inner{
  position:relative;
  z-index:1;
  width:min(var(--maxw),calc(100% - 2 * var(--gutter)));
  margin-inline:auto;
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,1fr) minmax(0,1fr) minmax(0,1.4fr);
  gap:var(--sp-6) var(--sp-5);
  padding-bottom:clamp(36px,5vw,56px);
}
.footer-brand{min-width:0}
.footer-mark{
  display:inline-flex;
  align-items:center;
  gap:10px;
  text-decoration:none;
  color:var(--paper);
}
.footer-mark:hover .footer-name{color:var(--neon)}
.footer-name{
  font-size:18px;
  font-weight:800;
  letter-spacing:.02em;
  transition:color .2s var(--ease);
}
.footer-line{
  margin-top:var(--sp-3);
  max-width:22em;
  font-size:14px;
  line-height:1.8;
  color:var(--mist);
}
.footer-col{min-width:0}
.footer-title{
  margin-bottom:var(--sp-3);
  font-size:11px;
  font-weight:700;
  letter-spacing:.16em;
  color:#7E8F8B;
  font-family:var(--font-body);
}
.footer-list{display:flex;flex-direction:column;gap:9px;font-size:14px}
.footer-list a{
  display:inline-block;
  color:#C4D0CC;
  text-decoration:none;
  transition:color .18s var(--ease),padding-left .18s var(--ease);
}
.footer-list a:hover{color:var(--neon);padding-left:4px}
.footer-list--plain{color:#B4C0BD}
.footer-list--plain li{word-break:break-word}
.footer-note{
  margin-top:var(--sp-3);
  max-width:24em;
  font-size:12px;
  line-height:1.75;
  color:#7E8F8B;
}
.footer-base{
  position:relative;
  z-index:1;
  width:min(var(--maxw),calc(100% - 2 * var(--gutter)));
  margin-inline:auto;
  border-top:1px solid rgba(42,91,88,.6);
  padding-block:var(--sp-4) clamp(24px,4vw,40px);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:var(--sp-3) var(--sp-5);
  font-size:12.5px;
  color:#7E8F8B;
}
.footer-copy{margin:0;max-width:none}
.footer-legal{display:flex;flex-wrap:wrap;gap:var(--sp-4)}
.footer-legal a{
  color:var(--mist);
  text-decoration:none;
  transition:color .18s var(--ease);
}
.footer-legal a:hover{color:var(--paper)}

/* ---------- 7. 容器与栅格 ---------- */
#main-content{
  display:block;
  padding-top:var(--header-h);
}
.shell{
  width:min(var(--maxw),calc(100% - 2 * var(--gutter)));
  margin-inline:auto;
}
.shell--narrow{
  width:min(760px,calc(100% - 2 * var(--gutter)));
  margin-inline:auto;
}
.stack{display:flex;flex-direction:column;gap:var(--sp-4)}
.stack--tight{display:flex;flex-direction:column;gap:var(--sp-2)}
.grid{display:grid;gap:var(--sp-5)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.split{
  display:grid;
  grid-template-columns:260px minmax(0,1fr);
  gap:var(--sp-6);
  align-items:start;
}

/* ---------- 8. 基础组件 ---------- */
.card{
  background:var(--ink-800);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:var(--sp-5);
  min-width:0;
}
.card--flush{padding:0;overflow:hidden}

.pill{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 12px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line);
  background:rgba(20,64,63,.55);
  font-size:12px;
  font-weight:600;
  letter-spacing:.1em;
  line-height:1.5;
  color:#B9C6C2;
}
.pill--neon{
  border-color:rgba(75,232,176,.55);
  color:var(--neon);
  background:rgba(75,232,176,.08);
}

.breadcrumb{
  width:min(var(--maxw),calc(100% - 2 * var(--gutter)));
  margin-inline:auto;
  padding-block:var(--sp-4);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--mist);
}
.breadcrumb ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li + li::before{content:"/";color:var(--line)}
.breadcrumb a{color:#B9C6C2;text-decoration:none;transition:color .18s var(--ease)}
.breadcrumb a:hover{color:var(--neon)}
.breadcrumb [aria-current="page"]{color:var(--paper)}

/* ---------- 9. 图片容器 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  isolation:isolate;
  border-radius:var(--radius-lg);
  border:1px solid var(--line);
  background:var(--ink-800);
  aspect-ratio:16 / 9;
}
.media-frame > img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  pointer-events:none;
  opacity:.5;
  mix-blend-mode:screen;
  background-image:
    linear-gradient(rgba(75,232,176,.09) 1px,transparent 1px),
    linear-gradient(90deg,rgba(75,232,176,.09) 1px,transparent 1px);
  background-size:32px 32px;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:auto 0 0 0;
  height:58%;
  z-index:1;
  pointer-events:none;
  background:linear-gradient(180deg,transparent,rgba(14,42,46,.82));
}
.media-frame--wide{aspect-ratio:16 / 9}
.media-frame--portrait{aspect-ratio:4 / 5}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame--band{aspect-ratio:21 / 9}
.media-frame--paper{border-color:var(--hair);background:#E9E3D9}
.media-frame--paper::before{
  opacity:.4;
  mix-blend-mode:multiply;
  background-image:
    linear-gradient(rgba(34,32,30,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(34,32,30,.07) 1px,transparent 1px);
}
.media-frame--paper::after{
  background:linear-gradient(180deg,transparent,rgba(34,32,30,.26));
}
.media-caption{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  z-index:2;
  padding:var(--sp-3) var(--sp-4);
  font-size:12px;
  line-height:1.6;
  letter-spacing:.08em;
  color:#C4D0CC;
}
.media-overlay{
  position:absolute;
  top:var(--sp-3);
  right:var(--sp-3);
  z-index:2;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:4px 10px;
  border-radius:var(--radius-pill);
  background:rgba(14,42,46,.82);
  border:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  color:var(--neon);
}

/* ---------- 10. 动效 ---------- */
html.js [data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .55s var(--ease),transform .55s var(--ease);
}
html.js [data-reveal].is-visible{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  html,html:focus-within{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  html.js [data-reveal]{opacity:1 !important;transform:none !important}
  .read-progress [data-progress-bar]{transition:none}
}

/* ---------- 11. 响应式 ---------- */
@media (max-width:1080px){
  .nav-toggle{display:inline-flex}
  .nav-island{
    position:absolute;
    top:calc(100% + 6px);
    left:0;
    right:0;
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    padding:var(--sp-3);
    border-radius:20px;
    background:rgba(10,31,34,.97);
    max-height:calc(100vh - 160px);
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s var(--ease);
  }
  .nav-island[data-open="true"]{opacity:1;visibility:visible;transform:none}
  .site-header.is-scrolled .nav-island{padding:var(--sp-3)}
  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-list a{padding:13px 14px;border-radius:12px;font-size:15px}
  .site-header.is-scrolled .nav-list a{padding:13px 14px}
  .nav-list a[aria-current="page"]{border-radius:12px}
  .nav-quick{margin-top:6px;justify-content:center;padding:13px}
  .nav-quick::after{display:none}
}

@media (max-width:900px){
  .grid--2,.grid--3{grid-template-columns:minmax(0,1fr)}
  .split{grid-template-columns:minmax(0,1fr);gap:var(--sp-5)}
  .footer-inner{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:720px){
  .brand-sub{display:none}
  .brand-island{padding:8px 14px 8px 9px}
  .footer-inner{grid-template-columns:minmax(0,1fr);gap:var(--sp-5)}
  .footer-base{flex-direction:column;align-items:flex-start}
  .footer-legal{gap:var(--sp-3) var(--sp-4)}
}

@media (max-width:420px){
  .nav-toggle-label{display:none}
  .nav-toggle{padding:10px 12px}
}

@media (min-width:1400px){
  :root{--maxw:1320px}
}