/* ===== 红蓝电竞馆 · 共享基础样式 /assets/site.css ===== */

:root{
  --ink:#0B1220;
  --ink-2:#111A2B;
  --red:#E23A3A;
  --red-hi:#F04A4A;
  --blue:#2D6CDF;
  --blue-hi:#3D7DF0;
  --cyan:#7FE3E0;
  --paper:#EFE6D6;
  --white:#F5F7FA;
  --muted:#8FA3BF;
  --amber:#FF8A3D;
  --line:#1F2E45;
  --rail-w:64px;
  --pad:clamp(18px,3.2vw,40px);
  --wrap:1180px;
  --font-sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --ease:cubic-bezier(.2,.8,.2,1);
}

*,*::before,*::after{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}

body{
  margin:0;
  padding-left:var(--rail-w);
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    linear-gradient(to right, rgba(31,46,69,.60) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(31,46,69,.60) 1px, transparent 1px),
    linear-gradient(to right, rgba(31,46,69,.26) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(31,46,69,.26) 1px, transparent 1px);
  background-size:96px 96px,96px 96px,24px 24px,24px 24px;
  background-attachment:fixed;
  color:var(--white);
  font-family:var(--font-sans);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,h5,h6{
  margin:0;
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.05;
}

p{margin:0 0 1.1em;max-width:68ch}
p:last-child{margin-bottom:0}

img{max-width:100%;height:auto;display:block}
ul,ol{margin:0;padding:0}
a{color:var(--cyan)}
a:hover{color:var(--white)}

strong{font-weight:900;color:var(--white)}

:where(a,button,[tabindex],summary):focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;
  top:10px;
  left:calc(var(--rail-w) + 12px);
  z-index:200;
  transform:translateY(-220%);
  display:inline-block;
  padding:11px 18px;
  background:var(--cyan);
  color:var(--ink);
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:700;
  letter-spacing:.05em;
  text-decoration:none;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
  transition:transform .2s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{
  transform:translateY(0);
  outline:2px solid var(--white);
  outline-offset:2px;
  color:var(--ink);
}

/* ---------- header ---------- */
.site-header{
  position:relative;
  background:linear-gradient(180deg,#0D1626 0%,var(--ink) 100%);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";
  display:block;
  height:7px;
  background:linear-gradient(90deg,var(--red) 0 47%,var(--ink) 47% 53%,var(--blue) 53% 100%);
  clip-path:polygon(0 0,100% 0,100% 100%,0 45%);
}

.header-rail{
  position:fixed;
  top:0;
  left:0;
  bottom:0;
  z-index:60;
  width:var(--rail-w);
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:16px;
  padding:18px 0 14px;
  background:linear-gradient(180deg,#0D1626 0%,#080E19 100%);
  border-right:1px solid var(--line);
}
.rail-mark{
  flex:none;
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.24em;
  color:var(--cyan);
}
.rail-scale{
  position:relative;
  flex:1 1 auto;
  width:100%;
  display:flex;
  justify-content:center;
}
.rail-ticks{
  position:absolute;
  top:0;
  bottom:0;
  left:50%;
  width:11px;
  transform:translateX(-50%);
  border-left:1px solid var(--line);
  background-image:repeating-linear-gradient(to bottom,var(--line) 0 1px,transparent 1px 22px);
  background-repeat:repeat-y;
  background-position:left top;
}
.rail-progress{
  position:absolute;
  top:0;
  left:50%;
  width:2px;
  height:0;
  transform:translateX(-50%);
  background:linear-gradient(180deg,var(--red) 0%,var(--blue) 100%);
  box-shadow:0 0 8px rgba(127,227,224,.55);
}
.rail-readout{
  flex:none;
  font-family:var(--font-mono);
  font-size:11px;
  font-variant-numeric:tabular-nums;
  letter-spacing:.06em;
  color:var(--muted);
}

.header-body{position:relative}

.header-topbar{
  display:grid;
  grid-template-columns:minmax(0,1fr) auto;
  align-items:center;
  gap:16px;
  padding:20px var(--pad);
  border-bottom:1px solid var(--line);
}

.brand-lockup{
  display:inline-flex;
  align-items:center;
  gap:14px;
  text-decoration:none;
  color:var(--white);
  min-width:0;
}
.brand-lockup::before{
  content:"";
  flex:none;
  width:14px;
  height:36px;
  background:linear-gradient(180deg,var(--red) 0 50%,var(--blue) 50% 100%);
  transform:skewX(-12deg);
}
.brand-lockup:hover .brand-name{color:var(--cyan)}
.brand-text{display:flex;flex-direction:column;gap:3px;min-width:0}
.brand-name{
  font-size:clamp(16px,2.2vw,21px);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.15;
  color:var(--white);
  transition:color .14s linear;
}
.brand-sub{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--muted);
  line-height:1.4;
}

.topbar-meta{
  display:flex;
  align-items:center;
  gap:12px;
  justify-self:end;
}
.status-pill{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 13px;
  background:rgba(45,108,223,.10);
  border:1px solid var(--line);
  color:var(--muted);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  white-space:nowrap;
  clip-path:polygon(9px 0,100% 0,100% 100%,0 100%);
}
.status-pill::before{
  content:"";
  flex:none;
  width:6px;
  height:6px;
  background:var(--cyan);
  box-shadow:0 0 7px var(--cyan);
}

.nav-toggle{
  position:relative;
  z-index:100;
  display:none;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  width:46px;
  height:42px;
  padding:0;
  background:var(--ink-2);
  border:1px solid var(--line);
  color:var(--white);
  cursor:pointer;
  clip-path:polygon(11px 0,100% 0,100% 100%,0 100%);
}
.nav-toggle-bar{
  display:block;
  width:20px;
  height:2px;
  background:var(--white);
  transition:transform .24s var(--ease),opacity .16s linear,width .2s var(--ease);
}
.nav-toggle-bar:nth-child(3){width:13px}
.nav-toggle:hover{border-color:var(--cyan)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3){width:20px;transform:translateY(-7px) rotate(-45deg)}

.primary-nav{
  position:relative;
  background:var(--ink);
}
.nav-list{
  display:flex;
  align-items:stretch;
  flex-wrap:wrap;
  gap:2px;
  list-style:none;
  margin:0;
  padding:0;
}
.nav-item{flex:1 1 0;min-width:0}
.nav-link{
  display:block;
  padding:15px 18px;
  text-align:center;
  font-size:15px;
  font-weight:600;
  color:var(--white);
  text-decoration:none;
  background:transparent;
  clip-path:polygon(0 0,100% 0,calc(100% - 12px) 100%,0 100%);
  transition:background .14s linear,color .14s linear;
}
.nav-link:hover{
  background:var(--ink-2);
  color:var(--cyan);
}
.nav-link:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:-3px;
  color:var(--cyan);
}
.nav-item[data-tone="red"] .nav-link[aria-current="page"]{
  background:var(--red);
  color:#fff;
}
.nav-item[data-tone="blue"] .nav-link[aria-current="page"]{
  background:var(--blue);
  color:#fff;
}
.nav-link[aria-current="page"]{font-weight:800}
.nav-link[aria-current="page"]:hover{color:#fff}

/* ---------- 通用布局 ---------- */
.wrap{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--pad);
}

.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:24px;
}
.grid-12 > *{min-width:0}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:14px 22px;
  border:0;
  font-family:var(--font-sans);
  font-size:15px;
  font-weight:700;
  line-height:1;
  text-decoration:none;
  cursor:pointer;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%);
  transition:transform .16s var(--ease),background .14s linear,color .14s linear,box-shadow .14s linear;
}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn--red{background:var(--red);color:#fff}
.btn--red:hover{background:var(--red-hi);color:#fff}
.btn--blue{background:var(--blue);color:#fff}
.btn--blue:hover{background:var(--blue-hi);color:#fff}
.btn--ghost{
  background:transparent;
  color:var(--white);
  box-shadow:inset 0 0 0 1px var(--line);
}
.btn--ghost:hover{
  color:var(--cyan);
  box-shadow:inset 0 0 0 1px var(--cyan);
}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  max-width:var(--wrap);
  margin-inline:auto;
  padding:22px var(--pad) 0;
}
.breadcrumb-list{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  list-style:none;
  margin:0;
  padding:0;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--muted);
}
.breadcrumb-list li{display:flex;align-items:center;gap:8px}
.breadcrumb-list li + li::before{content:"/";color:var(--line)}
.breadcrumb-list a{color:var(--muted);text-decoration:none}
.breadcrumb-list a:hover{color:var(--cyan)}
.breadcrumb-list [aria-current="page"]{color:var(--white)}

/* ---------- 章节头 ---------- */
.section-head{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  align-items:start;
  gap:6px 20px;
  margin:0 0 30px;
}
.section-num{
  grid-row:1 / span 2;
  padding-top:.6em;
  font-family:var(--font-mono);
  font-size:14px;
  font-weight:700;
  font-variant-numeric:tabular-nums;
  letter-spacing:.1em;
  color:var(--cyan);
}
.section-title{
  grid-column:2;
  margin:0;
  font-size:clamp(26px,4.2vw,46px);
  font-weight:900;
  letter-spacing:-.025em;
  line-height:1.05;
  color:var(--white);
}
.section-lede{
  grid-column:2;
  margin:0;
  max-width:62ch;
  font-size:16px;
  line-height:1.75;
  color:var(--muted);
}

/* ---------- 面板 ---------- */
.cut-panel{
  padding:26px 28px;
  background:var(--ink-2);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 20px),calc(100% - 20px) 100%,0 100%);
}
.cut-panel[data-tone="red"]{box-shadow:inset 4px 0 0 var(--red)}
.cut-panel[data-tone="blue"]{box-shadow:inset 4px 0 0 var(--blue)}

.paper-panel{
  padding:26px 28px;
  background:var(--paper);
  color:#141C29;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 20px),calc(100% - 20px) 100%,0 100%);
}
.paper-panel h2,.paper-panel h3,.paper-panel h4{color:#0B1220}
.paper-panel a{color:#1F4FB0}
.paper-panel a:hover{color:#0B1220}

/* ---------- 图片容器 ---------- */
.figure{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16 / 9;
  overflow:hidden;
  background:linear-gradient(135deg,#16223A 0%,#0B1220 100%);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 22px),calc(100% - 22px) 100%,0 100%);
}
.figure::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(to right, rgba(31,46,69,.45) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(31,46,69,.45) 1px, transparent 1px);
  background-size:36px 36px;
}
.figure img{
  position:relative;
  z-index:1;
  width:100%;
  height:100%;
  object-fit:cover;
}
.figure--wide{aspect-ratio:21 / 9}
.figure--square{aspect-ratio:1 / 1}
.figure--portrait{aspect-ratio:3 / 4}
.figure-cap{
  display:block;
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--muted);
}

/* ---------- 筛选 chip ---------- */
.chip{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:8px 15px;
  background:var(--ink-2);
  border:1px solid var(--line);
  color:var(--muted);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.05em;
  cursor:pointer;
  clip-path:polygon(9px 0,100% 0,100% calc(100% - 9px),calc(100% - 9px) 100%,0 100%);
  transition:color .14s linear,border-color .14s linear,background .14s linear;
}
.chip:hover{color:var(--cyan);border-color:var(--cyan)}
.chip[aria-pressed="true"]{
  background:var(--red);
  border-color:var(--red);
  color:#fff;
}

/* ---------- 折叠组 ---------- */
.fold{
  margin:0 0 12px;
  background:var(--ink-2);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 16px),calc(100% - 16px) 100%,0 100%);
}
.fold-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  width:100%;
  padding:18px 22px;
  background:none;
  border:0;
  color:var(--white);
  font-family:inherit;
  font-size:16px;
  font-weight:700;
  line-height:1.5;
  text-align:left;
  cursor:pointer;
}
.fold-head:hover{color:var(--cyan)}
.fold-head:focus-visible{outline-offset:-3px}
.fold-icon{
  flex:none;
  font-family:var(--font-mono);
  font-size:14px;
  color:var(--cyan);
  transition:transform .24s var(--ease);
}
.fold-head[aria-expanded="true"] .fold-icon{transform:rotate(180deg)}
.fold-panel{
  padding:0 22px 20px;
  font-size:15px;
  line-height:1.8;
  color:var(--muted);
}
.fold-panel[hidden]{display:none}

/* ---------- 滚动显现 ---------- */
.has-js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .42s var(--ease),transform .42s var(--ease);
}
.has-js [data-reveal].is-visible{
  opacity:1;
  transform:none;
}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  margin-top:0;
  background:linear-gradient(180deg,var(--ink) 0%,#080E19 100%);
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";
  display:block;
  height:7px;
  background:linear-gradient(90deg,var(--blue) 0 50%,var(--ink) 50% 56%,var(--red) 56% 100%);
  clip-path:polygon(0 0,100% 0,100% 100%,0 32%);
}

.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,1fr));
  gap:38px 32px;
  max-width:var(--wrap);
  margin-inline:auto;
  padding:64px var(--pad) 44px;
}

.footer-brand{
  display:flex;
  flex-direction:column;
  gap:16px;
  min-width:0;
}
.footer-brand-name{
  margin:0;
  max-width:none;
  font-size:clamp(22px,3vw,30px);
  font-weight:900;
  letter-spacing:-.025em;
  line-height:1.08;
  color:var(--white);
}
.footer-tagline{
  margin:0;
  max-width:36ch;
  font-size:15px;
  line-height:1.7;
  color:var(--muted);
}
.footer-cta{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:2px;
}

.footer-col{
  display:flex;
  flex-direction:column;
  gap:12px;
  min-width:0;
}
.footer-col-title{
  margin:0;
  max-width:none;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.16em;
  color:var(--cyan);
}
.footer-links{
  display:flex;
  flex-direction:column;
  gap:9px;
  list-style:none;
  margin:0;
  padding:0;
}
.footer-links a{
  display:inline-block;
  font-size:15px;
  color:var(--muted);
  text-decoration:none;
  border-bottom:1px solid transparent;
  padding-bottom:1px;
  transition:color .14s linear,border-color .14s linear;
}
.footer-links a:hover,
.footer-links a:focus-visible{
  color:var(--white);
  border-bottom-color:var(--red);
}

.footer-contact{
  grid-column:1 / -1;
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(210px,1fr));
  gap:16px 30px;
  padding:24px 28px;
  background:var(--paper);
  color:#0B1220;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 18px),calc(100% - 18px) 100%,0 100%);
}
.contact-line{
  display:flex;
  flex-direction:column;
  gap:3px;
  min-width:0;
}
.contact-label{
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:700;
  letter-spacing:.16em;
  color:#5A6478;
}
.contact-value{
  font-size:15px;
  font-weight:600;
  line-height:1.5;
  color:#0B1220;
  word-break:break-word;
}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  max-width:var(--wrap);
  margin-inline:auto;
  padding:20px var(--pad) 34px;
  border-top:1px solid var(--line);
}
.footer-legal,
.footer-copy{
  margin:0;
  max-width:none;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.05em;
  line-height:1.6;
  color:var(--muted);
}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
  .nav-link{font-size:14px;padding:14px 10px}
  .footer-grid{gap:32px 24px}
}

@media (max-width:980px){
  body{padding-left:0}
  .header-rail{display:none}
  .skip-link{left:12px}
  .nav-toggle{display:flex}
  .status-pill{display:none}
  .header-topbar{padding:16px var(--pad)}
  .primary-nav{
    position:fixed;
    top:0;
    right:0;
    bottom:0;
    left:auto;
    z-index:90;
    width:min(86vw,360px);
    height:100dvh;
    padding:88px 20px 40px;
    overflow-y:auto;
    background:linear-gradient(180deg,#0D1626 0%,#080E19 100%);
    border-left:1px solid var(--line);
    box-shadow:-24px 0 60px rgba(0,0,0,.5);
    transform:translateX(102%);
    visibility:hidden;
    opacity:0;
    transition:transform .3s var(--ease),opacity .2s linear,visibility .3s linear;
  }
  .primary-nav[data-open]{
    transform:translateX(0);
    visibility:visible;
    opacity:1;
  }
  .nav-list{flex-direction:column;gap:6px}
  .nav-item{flex:0 0 auto}
  .nav-link{
    text-align:left;
    padding:15px 18px;
    font-size:17px;
    clip-path:polygon(0 0,100% 0,calc(100% - 10px) 100%,0 100%);
  }
  .grid-12{grid-template-columns:minmax(0,1fr);gap:18px}
  .grid-12 > *{grid-column:auto}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1 / -1}
}

@media (max-width:720px){
  .section-head{grid-template-columns:minmax(0,1fr);gap:8px}
  .section-num{grid-row:auto;padding-top:0}
  .section-title,
  .section-lede{grid-column:1}
  .cut-panel,
  .paper-panel{padding:22px 20px}
  .footer-grid{grid-template-columns:minmax(0,1fr);padding:48px var(--pad) 32px}
  .footer-contact{padding:20px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

@media (max-width:520px){
  .brand-sub{font-size:10px;letter-spacing:.1em}
  .btn{width:100%}
  .footer-cta{width:100%}
}

@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;
    transition:none;
  }
  .btn:hover{transform:none}
}