/* ============================================================
   3499开服 · 共享站点样式 /assets/site.css
   深空黑 + 霓虹青 + 开服红 + 暖黄标记 · 蓝图网格 / 切角面板
   ============================================================ */

:root{
  --ink-0:#0A0A0F;
  --ink-1:#11131C;
  --line:#1B2030;
  --cyan:#00E5FF;
  --cyan-soft:#7BF3FF;
  --red:#FF3B3B;
  --amber:#FFD166;
  --mint:#2AE0A8;
  --text:#E8ECF4;
  --muted:#8C96B0;

  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Source Han Sans SC","Microsoft YaHei",monospace;
  --font-num:"Oswald","JetBrains Mono",ui-monospace,Impact,sans-serif;
  --font-hand:"LXGW WenKai","Noto Serif SC","Kaiti SC","STKaiti",cursive;

  --shell:1180px;
  --gutter:clamp(16px,4vw,40px);
  --nav-h:55px;
  --speed:.22s;

  --shape-cut:polygon(0 0,100% 0,100% calc(100% - 14px),calc(100% - 14px) 100%,0 100%);
  --shape-notch:polygon(0 0,100% 0,100% 62%,86% 100%,0 100%);
}

/* ---------------- 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,figure,blockquote,dl,dd,fieldset{margin:0}
ul,ol{padding:0}
ul[class],ol[class]{list-style:none}
img,svg,video{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

/* ---------------- 底色 · 蓝图网格 · 扫描线 ---------------- */
body{
  background-color:var(--ink-0);
  background-image:
    linear-gradient(rgba(27,32,48,.40) 1px,transparent 1px),
    linear-gradient(90deg,rgba(27,32,48,.40) 1px,transparent 1px);
  background-size:40px 40px;
  background-attachment:fixed;
  color:var(--text);
  font-family:var(--font-mono);
  font-size:15px;
  line-height:1.75;
  min-height:100vh;
  overflow-x:hidden;
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:800;
  pointer-events:none;
  background-image:repeating-linear-gradient(0deg,rgba(232,236,244,.03) 0 1px,transparent 1px 4px);
}

#main-content{display:block;scroll-margin-top:110px}

/* ---------------- 排版 ---------------- */
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  letter-spacing:.08em;
  line-height:1.12;
  color:var(--text);
}
h1{font-size:clamp(40px,7vw,96px);line-height:1.02}
h2{font-size:clamp(26px,4vw,40px)}
h3{font-size:clamp(18px,2.2vw,24px)}
p{max-width:68ch}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;letter-spacing:.04em}
.prose{max-width:68ch}
.prose p{margin-bottom:1em}
.prose h2,.prose h3{margin:1.6em 0 .6em}
.lede{font-size:clamp(16px,1.7vw,19px);color:#C7D0E2;max-width:60ch}
.hand-note{
  display:inline-block;
  font-family:var(--font-hand);
  font-size:15px;
  line-height:1.5;
  color:var(--amber);
  transform:rotate(-1.5deg);
}
.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;
}

/* ---------------- 跳转链接 ---------------- */
.skip-link{
  position:absolute;
  left:var(--gutter);
  top:-120px;
  z-index:900;
  padding:10px 18px;
  background:var(--cyan);
  color:var(--ink-0);
  font-family:var(--font-display);
  font-weight:900;
  font-size:13px;
  letter-spacing:.12em;
  clip-path:var(--shape-cut);
  transition:top var(--speed) ease;
}
.skip-link:focus{top:10px;outline:none;box-shadow:inset 0 0 0 2px var(--ink-0)}

/* ---------------- 按钮 ---------------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 20px;
  border:1px solid var(--cyan);
  background:transparent;
  color:var(--cyan);
  font-family:var(--font-display);
  font-weight:900;
  font-size:13px;
  letter-spacing:.14em;
  cursor:pointer;
  clip-path:var(--shape-cut);
  transition:background var(--speed) ease,color var(--speed) ease,transform var(--speed) ease;
}
.btn:hover{background:rgba(0,229,255,.14);color:var(--cyan-soft);transform:translateY(-1px)}
.btn:focus-visible{outline:none;box-shadow:inset 0 0 0 2px var(--cyan-soft)}
.btn--accent{border-color:var(--red);background:var(--red);color:var(--ink-0)}
.btn--accent:hover{background:#FF5C5C;border-color:#FF5C5C;color:var(--ink-0)}
.btn--accent:focus-visible{box-shadow:inset 0 0 0 2px var(--ink-0)}
.btn--ghost{border-color:var(--line);color:var(--muted)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);background:rgba(0,229,255,.08)}

/* ============================================================
   头部
   ============================================================ */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(10,10,15,.96);
  border-bottom:1px solid var(--line);
}
.header-shell{
  max-width:var(--shell);
  margin:0 auto;
  padding:0 var(--gutter);
}
.brand-band{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:12px 0;
}
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  min-width:0;
}
.brand-mark{
  display:grid;
  place-items:center;
  flex:none;
  width:56px;
  height:40px;
  background:var(--cyan);
  color:var(--ink-0);
  font-family:var(--font-num);
  font-weight:600;
  font-size:19px;
  letter-spacing:.04em;
  clip-path:var(--shape-notch);
}
.brand-copy{display:flex;flex-direction:column;min-width:0}
.brand-name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:17px;
  letter-spacing:.08em;
  color:var(--text);
  white-space:nowrap;
}
.brand-tagline{
  font-family:var(--font-hand);
  font-size:12.5px;
  line-height:1.6;
  color:var(--cyan-soft);
  opacity:.85;
  white-space:nowrap;
}
.header-tools{
  display:flex;
  align-items:center;
  gap:10px;
  flex:none;
}
.search-capsule{
  display:inline-flex;
  align-items:center;
  gap:9px;
  min-width:220px;
  padding:8px 15px;
  border:1px solid var(--line);
  border-radius:999px;
  background:var(--ink-1);
  color:var(--muted);
  font-size:12.5px;
  letter-spacing:.02em;
  transition:border-color var(--speed) ease,color var(--speed) ease,background var(--speed) ease;
}
.search-capsule:hover{border-color:var(--cyan);color:var(--cyan-soft);background:#141824}
.search-glyph{
  position:relative;
  flex:none;
  width:13px;
  height:13px;
  border:1.5px solid currentColor;
  border-radius:50%;
}
.search-glyph::after{
  content:"";
  position:absolute;
  right:-5px;
  bottom:-4px;
  width:7px;
  height:1.5px;
  background:currentColor;
  transform:rotate(45deg);
}
.search-placeholder{white-space:nowrap}
.header-cta{padding:9px 16px;font-size:12.5px}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 14px;
  border:1px solid var(--line);
  background:var(--ink-1);
  color:var(--text);
  font-family:var(--font-display);
  font-weight:900;
  font-size:12.5px;
  letter-spacing:.12em;
  cursor:pointer;
  clip-path:var(--shape-cut);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle[aria-expanded="true"]{border-color:var(--cyan);color:var(--cyan);background:#141824}
.nav-toggle-bars{
  position:relative;
  flex:none;
  width:16px;
  height:2px;
  background:currentColor;
  box-shadow:0 -5px 0 currentColor,0 5px 0 currentColor;
}
.nav-toggle-label{white-space:nowrap}

/* 下层栏目带 */
.nav-layer{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:var(--nav-h);
  border-top:1px solid var(--line);
}
.nav-list{
  display:flex;
  align-items:center;
  gap:6px;
  flex-wrap:wrap;
}
.nav-link{
  display:inline-flex;
  align-items:center;
  padding:7px 15px;
  border:1px solid transparent;
  border-radius:999px;
  color:var(--muted);
  font-size:13.5px;
  letter-spacing:.06em;
  white-space:nowrap;
  transition:color var(--speed) ease,background var(--speed) ease,border-color var(--speed) ease;
}
.nav-link:hover{color:var(--cyan);border-color:rgba(0,229,255,.4);background:rgba(0,229,255,.07)}
.nav-link[aria-current="page"]{
  background:var(--cyan);
  border-color:var(--cyan);
  color:var(--ink-0);
  font-weight:700;
}
.nav-status{
  display:inline-flex;
  align-items:center;
  gap:7px;
  flex:none;
  font-size:12px;
  letter-spacing:.1em;
  color:var(--muted);
  white-space:nowrap;
}
.status-dot{
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--mint);
  box-shadow:0 0 0 4px rgba(42,224,168,.16);
  animation:pulse 2.4s ease-in-out infinite;
}
@keyframes pulse{
  0%,100%{box-shadow:0 0 0 3px rgba(42,224,168,.14)}
  50%{box-shadow:0 0 0 7px rgba(42,224,168,.05)}
}

/* 滚动进度 */
.scroll-progress{
  position:absolute;
  left:0;
  bottom:-1px;
  width:100%;
  height:2px;
  transform:scaleX(var(--progress,0));
  transform-origin:left center;
  background:linear-gradient(90deg,var(--cyan),var(--cyan-soft) 55%,var(--red));
  pointer-events:none;
}

/* 宽屏：滚动后栏目带收缩为左侧纵向悬浮胶囊 */
@media (min-width:1440px){
  .site-header[data-scrolled="true"] .nav-layer{
    position:fixed;
    top:50%;
    left:14px;
    right:auto;
    transform:translateY(-50%);
    flex-direction:column;
    align-items:stretch;
    justify-content:center;
    gap:6px;
    min-height:0;
    padding:14px 10px;
    border:1px solid var(--line);
    background:rgba(17,19,28,.95);
    clip-path:var(--shape-cut);
  }
  .site-header[data-scrolled="true"] .nav-list{flex-direction:column;align-items:stretch;gap:4px;flex-wrap:nowrap}
  .site-header[data-scrolled="true"] .nav-link{padding:6px 12px;font-size:12.5px}
  .site-header[data-scrolled="true"] .nav-status{display:none}
  .site-header[data-scrolled="true"] .header-shell::after{content:"";display:block;height:var(--nav-h)}
}

/* ---------------- 平板与手机头部 ---------------- */
@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  .nav-layer{display:none;border-top:1px solid var(--line)}
  .nav-layer[data-open="true"]{
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:10px;
    padding:8px 0 16px;
    animation:navDrop .24s ease-out;
  }
  @keyframes navDrop{
    from{opacity:0;transform:translateY(-8px)}
    to{opacity:1;transform:none}
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:2px;flex-wrap:nowrap}
  .nav-link{
    border-radius:0;
    border-left:2px solid transparent;
    padding:12px 14px;
    font-size:15px;
    letter-spacing:.04em;
  }
  .nav-link:hover{border-radius:0;background:rgba(0,229,255,.08)}
  .nav-link[aria-current="page"]{
    border-radius:0;
    border-left-color:var(--ink-0);
    background:rgba(0,229,255,.16);
    color:var(--cyan-soft);
  }
  .nav-status{display:none}
}
@media (max-width:820px){
  .search-capsule{display:none}
}
@media (max-width:520px){
  .brand-tagline{display:none}
  .brand-mark{width:48px;height:36px;font-size:17px}
  .brand-name{font-size:15px}
  .header-cta{padding:8px 12px;font-size:11.5px;letter-spacing:.1em}
  .nav-toggle{padding:8px 11px}
  .nav-toggle-label{display:none}
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,96px);
  background:linear-gradient(180deg,rgba(17,19,28,.72),rgba(10,10,15,1));
  border-top:1px solid var(--line);
}
.diagonal-rule{
  display:block;
  height:10px;
  background-image:repeating-linear-gradient(-12deg,rgba(0,229,255,.30) 0 1px,transparent 1px 7px);
  opacity:.55;
}
.footer-shell{
  max-width:var(--shell);
  margin:0 auto;
  padding:clamp(34px,5vw,60px) var(--gutter) 22px;
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(200px,1fr) 2.6fr;
  gap:clamp(24px,4vw,56px);
}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start;gap:12px}
.footer-mark{
  font-family:var(--font-display);
  font-weight:900;
  font-size:23px;
  letter-spacing:.1em;
  color:var(--text);
}
.footer-mark:hover{
  color:var(--cyan-soft);
  text-shadow:-1.5px 0 0 rgba(255,59,59,.7),1.5px 0 0 rgba(0,229,255,.7);
}
.footer-kicker{
  font-family:var(--font-hand);
  font-size:14px;
  color:var(--amber);
  transform:rotate(-1.5deg);
}
.footer-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(180px,1fr));
  gap:clamp(20px,3vw,36px);
}
.footer-col{display:flex;flex-direction:column;gap:10px}
.footer-heading{
  display:flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-display);
  font-size:13px;
  font-weight:900;
  letter-spacing:.18em;
  color:var(--cyan);
}
.footer-heading::before{
  content:"";
  width:6px;
  height:6px;
  background:var(--red);
  flex:none;
}
.footer-links{display:flex;flex-direction:column;gap:6px}
.footer-link{
  display:inline-block;
  font-size:13.5px;
  color:var(--muted);
  transition:color var(--speed) ease,transform var(--speed) ease;
}
.footer-link::before{content:"▸ ";color:var(--line)}
.footer-link:hover{color:var(--cyan);transform:translateX(3px)}
.footer-text{
  font-size:13px;
  line-height:1.8;
  color:var(--muted);
  max-width:34ch;
  overflow-wrap:anywhere;
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 24px;
  margin-top:clamp(26px,4vw,42px);
  padding-top:18px;
  border-top:1px solid var(--line);
}
.footer-legal{
  font-size:12px;
  letter-spacing:.04em;
  color:var(--muted);
  max-width:none;
}
@media (max-width:900px){
  .footer-top{grid-template-columns:1fr}
  .footer-text{max-width:none}
}

/* ============================================================
   通用布局与组件
   ============================================================ */
.container{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:0 var(--gutter);
}
.container--narrow{max-width:860px}
.section{padding:clamp(40px,7vw,88px) 0}
.section--tight{padding:clamp(24px,4vw,44px) 0}
.grid{display:grid;gap:clamp(16px,2.5vw,28px)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.divider{
  height:1px;
  border:0;
  background:linear-gradient(90deg,var(--line),rgba(0,229,255,.35),transparent);
}

.panel{
  position:relative;
  background:var(--ink-1);
  border:1px solid var(--line);
  clip-path:var(--shape-cut);
  padding:clamp(18px,3vw,28px);
}
.panel--cyan{border-color:rgba(0,229,255,.35);background:#0E1420}

.media-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16/9;
  border:1px solid var(--line);
  background:
    linear-gradient(135deg,rgba(0,229,255,.10),rgba(255,59,59,.08)),
    var(--ink-1);
  clip-path:var(--shape-cut);
}
.media-frame img{width:100%;height:100%;object-fit:cover;object-position:center}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:repeating-linear-gradient(0deg,rgba(232,236,244,.06) 0 1px,transparent 1px 4px);
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame__caption{
  margin-top:10px;
  font-family:var(--font-hand);
  font-size:14px;
  color:var(--muted);
  max-width:none;
}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:12.5px;
  letter-spacing:.04em;
  color:var(--muted);
}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:rgba(140,150,176,.5)}
.breadcrumb a:hover{color:var(--cyan)}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-num);
  font-size:12px;
  letter-spacing:.28em;
  text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--cyan);flex:none}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 10px;
  border:1px solid var(--line);
  border-radius:999px;
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--muted);
  white-space:nowrap;
}
.tag--new{color:var(--amber);border-color:rgba(255,209,102,.5);background:rgba(255,209,102,.08)}
.tag--hot{color:#FF8080;border-color:rgba(255,59,59,.5);background:rgba(255,59,59,.10)}
.tag--live{color:var(--mint);border-color:rgba(42,224,168,.5);background:rgba(42,224,168,.08)}

.stat{display:flex;flex-direction:column;gap:4px}
.stat-value{
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-size:clamp(26px,3.4vw,38px);
  font-weight:600;
  letter-spacing:.04em;
  color:var(--cyan);
  line-height:1.1;
}
.stat-label{font-size:12.5px;letter-spacing:.1em;color:var(--muted)}

/* ---------------- 滚动显现 ---------------- */
[data-reveal]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .55s cubic-bezier(.2,.7,.3,1),transform .55s cubic-bezier(.2,.7,.3,1);
  transition-delay:var(--reveal-delay,0ms);
}
[data-reveal].is-revealed{opacity:1;transform:none}

/* ---------------- 减弱动效 ---------------- */
@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}
  .status-dot{box-shadow:0 0 0 4px rgba(42,224,168,.16)}
}