/* =========================================================
   AK赛场 · 共享站点样式 — /assets/site.css
   夜战战术板 / 编辑部目录 / 近单色墨绿体系
   ========================================================= */

/* ---------- 01 · 变量 ---------- */
:root{
  --ink:#06170F;
  --turf:#0B2A1D;
  --edge:#174A35;
  --neon:#3FF2C6;
  --teal:#1C8F78;
  --amber:#FF7A1A;
  --warm:#C9C2B6;
  --paper:#EDE7DA;
  --white:#F4F7F2;
  --alert:#E45B4A;

  --font-display:"Barlow Condensed","Oswald","Arial Narrow","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;

  --shell:1280px;
  --gutter:clamp(16px,4vw,44px);
  --gap:clamp(16px,2vw,24px);
  --ease:cubic-bezier(.3,.7,.3,1);
  --break-nav:1040px;
}

/* ---------- 02 · reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,dl,dd,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
[hidden]{display:none !important}
::selection{background:var(--neon);color:#04140D}

/* ---------- 03 · 中文排版与基底 ---------- */
body{
  background:var(--ink);
  color:var(--white);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:clip;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.02;
  letter-spacing:-.01em;
  color:var(--white);
  text-wrap:balance;
}
h2{font-size:clamp(1.6rem,2.6vw,2.4rem)}
h3{font-size:clamp(1.15rem,1.7vw,1.45rem);letter-spacing:0}
p{max-width:42ch}
strong{color:var(--neon);font-weight:700}
em{font-style:normal;color:var(--amber)}

:focus-visible{outline:2px solid var(--neon);outline-offset:3px}
a:focus-visible,button:focus-visible{outline:2px solid var(--neon);outline-offset:3px}

#main-content{display:block;scroll-margin-top:96px}

/* ---------- 04 · 跳过链接 ---------- */
.ak-skip{
  position:absolute;
  left:16px;
  top:-72px;
  z-index:120;
  padding:11px 18px;
  background:var(--neon);
  color:#04140D;
  font-size:14px;
  font-weight:700;
  letter-spacing:.06em;
  border-left:4px solid var(--amber);
  transition:top .18s var(--ease);
}
.ak-skip:focus{top:12px}

/* ---------- 05 · 头部 ---------- */
.ak-header{
  position:sticky;
  top:0;
  z-index:80;
  background:linear-gradient(180deg,#082013 0%,var(--ink) 88%);
  border-bottom:1px solid var(--edge);
  color:var(--white);
}
.ak-header__rail{
  height:4px;
  background:
    linear-gradient(90deg,var(--neon) 0 16%,var(--teal) 16% 34%,var(--amber) 34% 41%,var(--edge) 41% 74%,transparent 74% 100%);
}
.ak-header__inner{
  position:relative;
  max-width:var(--shell);
  margin:0 auto;
  padding:12px var(--gutter);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:clamp(12px,2vw,28px);
}

/* 品牌：左端固定 */
.ak-brand{display:flex;align-items:center;min-width:0}
.ak-brand__link{display:flex;align-items:center;gap:12px}
.ak-brand__mark{
  font-family:var(--font-display);
  font-weight:800;
  font-size:30px;
  line-height:.86;
  letter-spacing:-.04em;
  color:var(--neon);
  padding-left:10px;
  border-left:4px solid var(--amber);
}
.ak-brand__text{display:block;min-width:0}
.ak-brand__name{
  display:block;
  font-family:var(--font-display);
  font-size:18px;
  font-weight:700;
  line-height:1.1;
  letter-spacing:.22em;
  color:var(--white);
  padding-left:2px;
}
.ak-brand__tag{
  display:block;
  margin-top:3px;
  font-size:10.5px;
  line-height:1.4;
  letter-spacing:.14em;
  color:var(--warm);
  white-space:nowrap;
}

/* 导航：右端 */
.ak-nav{display:flex;align-items:center;margin-left:auto}
.ak-nav__list{display:flex;align-items:center;gap:clamp(10px,1.7vw,24px)}
.ak-nav__item{position:relative}
.ak-nav__link{
  position:relative;
  display:inline-block;
  padding:7px 2px 9px;
  font-size:14px;
  letter-spacing:.12em;
  color:var(--warm);
  transition:color .18s var(--ease);
}
.ak-nav__link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  background:var(--neon);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .18s var(--ease);
}
.ak-nav__link:hover{color:var(--white)}
.ak-nav__link:hover::after{transform:scaleX(1)}
.ak-nav__link[aria-current="page"]{color:var(--neon);font-weight:700}
.ak-nav__link[aria-current="page"]::after{transform:scaleX(1)}
.ak-nav__link[aria-current="page"]::before{
  content:"";
  position:absolute;
  left:-9px;
  top:10px;
  width:2px;
  height:12px;
  background:var(--amber);
}

/* 头部行动点 */
.ak-header__actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}

/* 移动端按钮 */
.ak-navbtn{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 12px;
  background:transparent;
  border:1px solid var(--edge);
  color:var(--white);
  font-size:11.5px;
  letter-spacing:.18em;
  cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.ak-navbtn:hover{border-color:var(--teal)}
.ak-navbtn.is-open{color:var(--neon);border-color:var(--neon)}
.ak-navbtn__bars{
  display:block;
  width:17px;
  height:2px;
  background:currentColor;
  box-shadow:0 -5px 0 currentColor,0 5px 0 currentColor;
}
.ak-navbtn__text{display:block}

/* ---------- 06 · 通用按钮 ---------- */
.ak-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 18px;
  border:1px solid var(--edge);
  border-radius:0;
  background:transparent;
  color:var(--white);
  font-family:var(--font-body);
  font-size:14px;
  font-weight:700;
  letter-spacing:.08em;
  cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.ak-btn:hover{transform:translateY(-2px);border-color:var(--neon);color:var(--neon)}
.ak-btn--amber{
  background:var(--amber);
  border-color:var(--amber);
  color:#1B0D02;
  box-shadow:4px 4px 0 rgba(63,242,198,.16);
}
.ak-btn--amber:hover{background:#FF9B4D;border-color:#FF9B4D;color:#1B0D02;box-shadow:6px 6px 0 rgba(63,242,198,.22)}
.ak-btn--ghost{border-color:var(--teal);color:var(--neon)}
.ak-btn--ghost:hover{border-color:var(--neon);background:rgba(63,242,198,.08)}
.ak-btn--sm{padding:8px 13px;font-size:12.5px;letter-spacing:.1em}

/* ---------- 07 · 页脚 ---------- */
.ak-footer{
  position:relative;
  margin-top:clamp(64px,9vw,120px);
  background:var(--turf);
  border-top:4px solid var(--neon);
  overflow:hidden;
}
.ak-footer::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(var(--edge) 1px,transparent 1px),
    linear-gradient(90deg,var(--edge) 1px,transparent 1px);
  background-size:72px 72px;
  opacity:.28;
  pointer-events:none;
}
.ak-footer__inner{
  position:relative;
  z-index:1;
  max-width:var(--shell);
  margin:0 auto;
  padding:clamp(40px,5vw,64px) var(--gutter) clamp(24px,3vw,36px);
  display:grid;
  grid-template-columns:1.7fr 1fr 1fr 1.35fr;
  gap:clamp(24px,3vw,44px);
}
.ak-footer__brand{min-width:0}
.ak-footer__mark{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(34px,4vw,46px);
  line-height:.9;
  letter-spacing:-.03em;
  color:var(--neon);
}
.ak-footer__mark-al{
  margin-left:10px;
  font-size:.52em;
  letter-spacing:.24em;
  color:var(--white);
}
.ak-footer__line{
  margin-top:10px;
  font-size:13px;
  letter-spacing:.1em;
  color:var(--white);
  max-width:32ch;
}
.ak-footer__note{
  margin-top:14px;
  padding-left:12px;
  border-left:2px solid var(--amber);
  font-size:12.5px;
  line-height:1.7;
  color:var(--warm);
  max-width:36ch;
}
.ak-footer__col{min-width:0}
.ak-footer__head{
  font-family:var(--font-body);
  font-size:11px;
  font-weight:700;
  letter-spacing:.22em;
  color:var(--teal);
  padding-bottom:10px;
  border-bottom:1px solid var(--edge);
}
.ak-footer__list{margin-top:14px;display:grid;gap:9px}
.ak-footer__link{
  display:inline-block;
  font-size:13.5px;
  letter-spacing:.06em;
  color:var(--warm);
  transition:color .18s var(--ease),transform .18s var(--ease);
}
.ak-footer__link:hover{color:var(--neon);transform:translateX(3px)}
.ak-footer__col--contact .ak-footer__list{gap:14px}
.ak-footer__item{display:grid;gap:2px}
.ak-footer__k{
  font-size:10.5px;
  letter-spacing:.2em;
  color:var(--teal);
}
.ak-footer__v{
  font-family:var(--font-mono);
  font-size:12.5px;
  line-height:1.65;
  letter-spacing:.02em;
  color:var(--white);
  word-break:break-word;
}
.ak-footer__base{
  position:relative;
  z-index:1;
  max-width:var(--shell);
  margin:0 auto;
  padding:16px var(--gutter) clamp(28px,4vw,40px);
  border-top:1px solid var(--edge);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.14em;
  color:var(--warm);
}
.ak-footer__legal{max-width:none}
.ak-footer__copy{max-width:none}

/* ---------- 08 · 布局容器与栅格 ---------- */
.ak-main{display:block}
.ak-shell{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:0 var(--gutter);
}
.ak-section{padding:clamp(36px,5vw,72px) 0}
.ak-section__head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:14px;
  padding-bottom:16px;
  border-bottom:1px solid var(--edge);
  margin-bottom:clamp(20px,3vw,32px);
}
.ak-grid{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:var(--gap);
}
.ak-span-4{grid-column:span 4}
.ak-span-6{grid-column:span 6}
.ak-span-8{grid-column:span 8}
.ak-span-12{grid-column:span 12}
.ak-deck{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
  gap:var(--gap);
}

/* ---------- 09 · 文字组件 ---------- */
.ak-display{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(2.8rem,7vw,6.4rem);
  line-height:.9;
  letter-spacing:-.02em;
  color:var(--white);
}
.ak-lede{
  font-size:clamp(16px,1.6vw,19px);
  line-height:1.7;
  color:var(--warm);
  max-width:38ch;
}
.ak-label{
  display:inline-block;
  font-size:11px;
  font-weight:700;
  letter-spacing:.2em;
  color:var(--neon);
}
.ak-label--side{
  writing-mode:vertical-rl;
  letter-spacing:.24em;
  padding:6px 0;
  border-top:1px solid var(--edge);
  border-bottom:1px solid var(--edge);
}
.ak-mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.04em;
}
.ak-note{
  padding-left:12px;
  border-left:2px solid var(--teal);
  font-size:13px;
  line-height:1.75;
  color:var(--warm);
  max-width:40ch;
}
.ak-prose{
  max-width:42ch;
  font-size:16.5px;
  line-height:1.85;
  color:var(--warm);
}
.ak-prose p{max-width:none}
.ak-prose p + p{margin-top:1em}

/* ---------- 10 · 卡片与纸张叠层 ---------- */
.ak-card{
  position:relative;
  background:var(--turf);
  border:1px solid var(--edge);
  padding:clamp(16px,2vw,22px);
  transition:transform .18s var(--ease),border-color .18s var(--ease),background .18s var(--ease);
}
.ak-card:hover{transform:translateY(-2px);border-color:var(--neon)}
.ak-paper{
  position:relative;
  background:var(--paper);
  color:#0F241A;
  border:1px solid #0A1F16;
  padding:clamp(16px,2vw,22px);
  box-shadow:8px 8px 0 rgba(63,242,198,.14);
}
.ak-paper h2,.ak-paper h3,.ak-paper h4{color:#0F241A}
.ak-paper .ak-mono{color:#0B5E4B}
.ak-paper p{color:#24382D}

/* ---------- 11 · 全宽条带与筛选按钮 ---------- */
.ak-strip{
  position:relative;
  width:100%;
  background:var(--ink);
  border-top:1px solid var(--edge);
  border-bottom:1px solid var(--edge);
}
.ak-strip__track{
  display:flex;
  align-items:center;
  gap:10px;
  padding:12px var(--gutter);
  overflow-x:auto;
  scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
}
.ak-strip__track::-webkit-scrollbar{height:0}
.ak-filter{
  flex:0 0 auto;
  padding:7px 13px;
  background:transparent;
  border:1px solid var(--edge);
  color:var(--warm);
  font-size:12.5px;
  letter-spacing:.1em;
  cursor:pointer;
  white-space:nowrap;
  transition:color .18s var(--ease),border-color .18s var(--ease),background .18s var(--ease);
}
.ak-filter:hover{color:var(--white);border-color:var(--teal)}
.ak-filter[aria-pressed="true"]{
  color:var(--neon);
  border-color:var(--neon);
  background:rgba(63,242,198,.1);
}

/* ---------- 12 · 面包屑 ---------- */
.ak-crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding:22px 0 0;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.12em;
  color:var(--warm);
}
.ak-crumbs a{color:var(--warm);transition:color .18s var(--ease)}
.ak-crumbs a:hover{color:var(--neon)}
.ak-crumbs__sep{color:var(--teal)}
.ak-crumbs [aria-current="page"]{color:var(--neon)}

/* ---------- 13 · 图片容器基础 ---------- */
.ak-frame{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16 / 10;
  overflow:hidden;
  background:var(--turf);
  border:1px solid var(--edge);
}
.ak-frame--wide{aspect-ratio:21 / 9}
.ak-frame--tall{aspect-ratio:4 / 5}
.ak-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.88) contrast(1.06);
}
.ak-frame::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(158deg,rgba(63,242,198,.14),transparent 54%,rgba(6,23,15,.55));
  pointer-events:none;
}
.ak-figure{display:grid;gap:8px}
.ak-figure__cap{
  font-size:12px;
  line-height:1.6;
  letter-spacing:.06em;
  color:var(--warm);
  padding-left:10px;
  border-left:2px solid var(--edge);
}

/* ---------- 14 · 滚动进度与显现 ---------- */
.ak-progress{
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  height:3px;
  z-index:90;
  background:rgba(23,74,53,.5);
  pointer-events:none;
}
.ak-progress__bar{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--teal),var(--neon) 70%,var(--amber));
}
[data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
[data-reveal].is-in{opacity:1;transform:none}

/* ---------- 15 · 响应式 ---------- */
@media (max-width:1040px){
  .ak-navbtn{display:inline-flex}
  .ak-nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    display:none;
    margin-left:0;
    background:var(--turf);
    border-top:1px solid var(--edge);
    border-bottom:4px solid var(--neon);
    box-shadow:0 26px 44px rgba(0,0,0,.6);
  }
  .ak-nav[data-open="true"]{display:block}
  .ak-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:6px var(--gutter) 18px;
  }
  .ak-nav__item{border-bottom:1px solid var(--edge)}
  .ak-nav__item:last-child{border-bottom:0}
  .ak-nav__link{
    display:block;
    padding:15px 0;
    font-size:15px;
    letter-spacing:.14em;
  }
  .ak-nav__link::after{display:none}
  .ak-nav__link[aria-current="page"]::before{
    left:auto;
    right:0;
    top:50%;
    height:14px;
    transform:translateY(-50%);
  }
  .ak-header__actions .ak-btn--ghost{display:none}
  .ak-brand__tag{display:none}
}

@media (max-width:900px){
  .ak-grid{grid-template-columns:repeat(4,minmax(0,1fr))}
  .ak-span-4,.ak-span-6,.ak-span-8{grid-column:span 4}
  .ak-footer__inner{grid-template-columns:1fr 1fr;gap:28px}
  .ak-footer__brand{grid-column:1 / -1}
}

@media (max-width:640px){
  body{font-size:16px;line-height:1.72}
  .ak-header__inner{padding:10px var(--gutter);gap:10px}
  .ak-brand__mark{font-size:25px;padding-left:8px;border-left-width:3px}
  .ak-brand__name{font-size:16px;letter-spacing:.16em}
  .ak-btn--sm{padding:7px 10px;font-size:11.5px}
  .ak-footer__inner{grid-template-columns:1fr}
  .ak-footer__base{flex-direction:column;align-items:flex-start;letter-spacing:.1em}
  .ak-strip__track{padding:10px var(--gutter)}
}

/* ---------- 16 · 动效降级 ---------- */
@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}
  .ak-btn:hover,.ak-card:hover,.ak-footer__link:hover{transform:none}
}