/* ==========================================================================
   火马电竞 · 共享样式表 /assets/site.css
   设计基因：技术蓝图网格 + 侧边轨道导航 + 框景首屏 + 炽焰橙节奏
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --ink:#0A0C10;
  --char:#121620;
  --char-2:#161B26;
  --flame:#FF5A1F;
  --flame-deep:#B8320A;
  --data:#2D9CFF;
  --neon:#B8FF3B;
  --ice:#F5F7FB;
  --steel:#2F3646;
  --slate:#8B94A7;
  --amber:#FFB020;
  --text:#D5DBE6;

  --rail-w:104px;
  --bar-h:56px;
  --maxw:1280px;
  --gut:clamp(18px,4vw,56px);
  --hair:1px solid var(--steel);

  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono","Courier New",monospace;

  --ease:cubic-bezier(.2,.7,.2,1);
}

/* ---------- 2. 重置 ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink);
  color:var(--text);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img,svg,video{display:block;max-width:100%;height:auto;}
button,input,select,textarea{font:inherit;color:inherit;}
a{color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
p{margin:0;}
h1,h2,h3,h4,h5,h6{margin:0;color:var(--ice);}
hr{margin:0;border:0;}
table{border-collapse:collapse;width:100%;}
::selection{background:var(--flame);color:#0A0C10;}
:focus-visible{outline:2px solid var(--flame);outline-offset:3px;}

/* ---------- 3. 中文排版层级 ---------- */
h1{font-weight:200;font-size:clamp(34px,6.2vw,76px);line-height:1.04;letter-spacing:-.03em;}
h2{font-weight:800;font-size:clamp(23px,3vw,38px);line-height:1.16;letter-spacing:-.015em;}
h3{font-weight:700;font-size:clamp(17px,1.5vw,22px);line-height:1.35;}
h4{font-weight:700;font-size:16px;line-height:1.4;letter-spacing:.02em;}
.num,[data-num]{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.01em;}

/* ---------- 4. 内容容器与节段 ---------- */
.shell{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gut);
}
.shell--narrow{max-width:900px;}
.section{padding-block:clamp(44px,6vw,96px);}
.prose{max-width:72ch;font-size:17px;line-height:1.78;color:var(--text);}
.prose p + p{margin-top:1.1em;}
.prose h2{margin-top:1.9em;margin-bottom:.6em;}
.prose h3{margin-top:1.6em;margin-bottom:.5em;}
.prose ul{margin-top:1em;display:grid;gap:8px;}
.prose li{padding-left:18px;position:relative;}
.prose li::before{content:"";position:absolute;left:0;top:.72em;width:8px;height:1px;background:var(--flame);}
.rule{height:1px;background:var(--steel);margin-block:clamp(26px,4vw,54px);}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:11px;letter-spacing:.26em;
  text-transform:uppercase;color:var(--flame);
}
.eyebrow::before{content:"";width:26px;height:1px;background:currentColor;}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;font-family:var(--mono);font-size:12px;letter-spacing:.06em;
  color:var(--neon);border:1px solid rgba(184,255,59,.42);
  background:rgba(184,255,59,.07);
}
.tag--data{color:var(--data);border-color:rgba(45,156,255,.42);background:rgba(45,156,255,.08);}
.tag--warn{color:var(--amber);border-color:rgba(255,176,32,.42);background:rgba(255,176,32,.08);}

/* ---------- 5. 蓝图网格 ---------- */
.grid{display:grid;gap:clamp(14px,2vw,28px);}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr));}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:13px 22px;font-size:14px;font-weight:700;letter-spacing:.02em;
  font-family:var(--sans);text-decoration:none;cursor:pointer;
  border:1px solid transparent;background:none;color:var(--ice);
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn--flame{background:var(--flame);color:#0A0C10;border-color:var(--flame);}
.btn--flame:hover{background:var(--flame-deep);border-color:var(--flame-deep);color:var(--ice);}
.btn--ghost{border-color:var(--steel);color:var(--ice);}
.btn--ghost:hover{border-color:var(--flame);color:var(--flame);}
.btn--sm{padding:9px 15px;font-size:13px;}
.btn__arrow{font-family:var(--mono);line-height:1;}

/* ---------- 7. 面包屑 ---------- */
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  margin:0 0 24px;font-family:var(--mono);font-size:12px;letter-spacing:.06em;
  color:var(--slate);list-style:none;
}
.crumb li{display:flex;align-items:center;gap:8px;}
.crumb li + li::before{content:"/";color:var(--steel);}
.crumb a{color:var(--slate);text-decoration:none;transition:color .18s var(--ease);}
.crumb a:hover{color:var(--flame);}

/* ---------- 8. 图片容器基础规则 ---------- */
.figure{
  position:relative;display:block;width:100%;margin:0;
  aspect-ratio:16 / 9;overflow:hidden;
  background:var(--char);
  border:1px solid var(--steel);
}
.figure::before{
  content:"";position:absolute;inset:0;z-index:0;pointer-events:none;
  background-image:
    repeating-linear-gradient(90deg,rgba(47,54,70,.55) 0 1px,transparent 1px 56px),
    repeating-linear-gradient(180deg,rgba(47,54,70,.55) 0 1px,transparent 1px 56px);
}
.figure__img{
  position:relative;z-index:1;
  width:100%;height:100%;object-fit:cover;
  filter:saturate(1.04) contrast(1.03);
}
.figure__cap{
  position:absolute;z-index:2;left:0;bottom:0;
  padding:8px 12px;font-family:var(--mono);font-size:11px;letter-spacing:.08em;
  color:var(--slate);background:rgba(10,12,16,.82);
  border-top:1px solid var(--steel);border-right:1px solid var(--steel);
}
.figure--wide{aspect-ratio:21 / 9;}
.figure--portrait{aspect-ratio:3 / 4;}
.figure--square{aspect-ratio:1 / 1;}

/* ---------- 9. 跳至主内容 ---------- */
.skip-link{
  position:fixed;left:14px;top:-80px;z-index:200;
  padding:10px 18px;background:var(--flame);color:#0A0C10;
  font-size:14px;font-weight:700;text-decoration:none;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:14px;}

/* ==========================================================================
   10. 头部 · 侧边轨道导航
   ========================================================================== */
.rail{
  position:fixed;
  inset:0 auto 0 0;
  width:var(--rail-w);
  z-index:80;
  background:linear-gradient(180deg,#0A0C10 0%,#0C1017 58%,#0A0C10 100%);
  border-right:var(--hair);
}
.rail::after{
  content:"";position:absolute;top:0;right:0;width:6px;height:100%;
  pointer-events:none;
  background-image:repeating-linear-gradient(180deg,var(--steel) 0 1px,transparent 1px 26px);
  background-position:right top;
  background-size:6px 26px;
  background-repeat:repeat-y;
  opacity:.9;
}
.rail__inner{
  height:100%;
  display:flex;flex-direction:column;
  padding:24px 0 18px;
}

/* 品牌 */
.rail__brand{display:block;padding-inline:16px;text-decoration:none;}
.rail__brand-mark{
  display:block;font-size:24px;font-weight:900;line-height:1.05;
  letter-spacing:.06em;color:var(--ice);
}
.rail__brand-mark::after{
  content:"";display:block;width:22px;height:3px;
  margin-top:7px;background:var(--flame);
}
.rail__brand-sub{
  display:block;margin-top:8px;
  font-size:11px;font-weight:700;letter-spacing:.34em;
  color:var(--flame);
}
.rail__brand:hover .rail__brand-mark{color:var(--flame);}

.rail__descriptor{
  margin:18px 0 0;padding-inline:16px;
  font-size:10px;line-height:1.66;letter-spacing:.08em;
  color:var(--slate);
}

/* 移动开关 */
.rail__toggle{
  display:none;
  align-items:center;gap:9px;
  padding:8px 12px;margin-left:auto;
  background:none;border:1px solid var(--steel);border-radius:0;
  color:var(--ice);font-size:12px;font-weight:700;letter-spacing:.08em;
  cursor:pointer;transition:border-color .18s var(--ease),color .18s var(--ease);
}
.rail__toggle:hover{border-color:var(--flame);color:var(--flame);}
.rail__toggle-box{display:inline-flex;flex-direction:column;gap:3px;width:15px;}
.rail__toggle-box i{display:block;height:1.5px;background:currentColor;}
.rail__toggle-box i:nth-child(2){width:68%;}

/* 导航 */
.rail__nav{margin-top:26px;flex:1 1 auto;overflow-y:auto;overscroll-behavior:contain;}
.rail__nav::-webkit-scrollbar{width:4px;}
.rail__nav::-webkit-scrollbar-thumb{background:var(--steel);}
.rail__list{display:block;}
.rail__link{
  display:block;
  padding:9px 14px 9px 13px;
  border-left:2px solid transparent;
  text-decoration:none;
  color:var(--slate);
  transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);
}
.rail__link:hover,
.rail__link:focus-visible{
  color:var(--ice);
  border-left-color:var(--flame);
  background:rgba(255,90,31,.07);
}
.rail__link[aria-current="page"]{
  color:var(--ice);
  border-left-color:var(--flame);
  background:linear-gradient(90deg,rgba(255,90,31,.16),rgba(255,90,31,0));
}
.rail__idx{
  display:block;font-family:var(--mono);font-size:10px;
  letter-spacing:.14em;color:var(--flame);line-height:1;
}
.rail__label{
  display:block;margin-top:5px;
  font-size:12px;line-height:1.5;letter-spacing:.02em;
}

/* 轨道 CTA */
.rail__cta{
  display:flex;flex-direction:column;gap:8px;
  margin:16px 12px 0;
  padding:13px 11px;
  background:var(--flame);color:#0A0C10;
  border:1px solid var(--flame);
  text-decoration:none;
  font-size:12px;font-weight:800;line-height:1.45;letter-spacing:.02em;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.rail__cta:hover{background:var(--flame-deep);border-color:var(--flame-deep);color:var(--ice);}
.rail__cta-arrow{font-family:var(--mono);font-size:13px;line-height:1;}

/* ==========================================================================
   11. 页脚 · 蓝图基座
   ========================================================================== */
.site-foot{
  position:relative;
  margin-top:clamp(40px,7vw,110px);
  background:#090B0F;
  border-top:var(--hair);
}
.site-foot::before{
  content:"";position:absolute;top:-1px;left:0;
  width:min(240px,34%);height:3px;
  background:linear-gradient(90deg,var(--flame),rgba(255,90,31,0));
}
.site-foot__inner{
  max-width:var(--maxw);
  margin-inline:auto;
  padding:clamp(36px,5vw,68px) var(--gut) clamp(26px,3vw,40px);
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.25fr;
  gap:clamp(24px,3vw,48px);
  align-items:start;
}
.foot-lead__mark{
  font-size:22px;font-weight:900;letter-spacing:.06em;color:var(--ice);
  line-height:1.1;
}
.foot-lead__mark::after{
  content:"";display:block;width:30px;height:2px;margin-top:10px;background:var(--flame);
}
.foot-lead__tag{
  margin-top:12px;font-size:12px;letter-spacing:.14em;
  font-family:var(--mono);color:var(--slate);
}
.foot-lead__contact{margin-top:22px;display:grid;gap:2px;}
.foot-lead__row{
  display:flex;flex-wrap:wrap;gap:10px;
  padding:7px 0;border-bottom:1px dashed rgba(47,54,70,.65);
  font-size:13px;
}
.foot-lead__key{
  flex:0 0 74px;font-family:var(--mono);font-size:11px;
  letter-spacing:.1em;color:var(--slate);
}
.foot-lead__val{color:var(--text);word-break:break-all;}

.foot-col__title{
  display:flex;align-items:center;gap:9px;
  margin:0 0 16px;padding-bottom:11px;
  font-size:12px;font-weight:800;letter-spacing:.18em;
  color:var(--ice);border-bottom:var(--hair);
}
.foot-col__title::before{content:"";width:6px;height:6px;background:var(--flame);flex:0 0 auto;}
.foot-col__list{display:grid;gap:1px;}
.foot-col__link{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:10px 0;font-size:14px;color:var(--slate);text-decoration:none;
  border-bottom:1px dashed rgba(47,54,70,.65);
  transition:color .18s var(--ease),padding-left .18s var(--ease);
}
.foot-col__link::after{
  content:"→";font-family:var(--mono);font-size:12px;
  opacity:0;transition:opacity .18s var(--ease);
}
.foot-col__link:hover{color:var(--flame);padding-left:6px;}
.foot-col__link:hover::after{opacity:1;}
.foot-col__text{font-size:13px;line-height:1.7;color:var(--slate);margin-top:10px;}
.foot-col__icp{font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:var(--text);}

.site-foot__base{border-top:var(--hair);background:#07090C;}
.site-foot__base-inner{
  max-width:var(--maxw);
  margin-inline:auto;
  padding:16px var(--gut) 24px;
  display:flex;flex-wrap:wrap;gap:8px 28px;
  align-items:center;justify-content:space-between;
  font-family:var(--mono);font-size:12px;letter-spacing:.04em;
  color:var(--slate);
}
.foot-base__item{margin:0;}

/* ==========================================================================
   12. 滚动进度条（脚本注入）
   ========================================================================== */
.read-bar{
  position:fixed;top:0;left:var(--rail-w);right:0;height:2px;
  z-index:90;pointer-events:none;background:transparent;
}
.read-bar__fill{
  height:100%;width:0;
  background:linear-gradient(90deg,var(--flame),var(--amber));
  transition:width .1s linear;
}

/* ==========================================================================
   13. 显现动效
   ========================================================================== */
.js [data-reveal]{
  opacity:0;transform:translateY(16px);
  transition:opacity .55s var(--ease),transform .55s var(--ease);
}
.js [data-reveal].is-in{opacity:1;transform:none;}

/* ==========================================================================
   14. 响应式
   ========================================================================== */

/* 桌面端给固定轨道让位 */
@media (min-width:900px){
  body{padding-left:var(--rail-w);}
}

/* 平板：轨道收窄 */
@media (min-width:900px) and (max-width:1180px){
  :root{--rail-w:92px;}
  .rail__label{font-size:11px;}
  .rail__brand-mark{font-size:21px;}
  .rail__cta{font-size:11px;padding:11px 9px;}
  .site-foot__inner{grid-template-columns:1.4fr 1fr 1fr;}
  .foot-col--addr{grid-column:1 / -1;}
}

/* 平板与手机：顶部细条 + 抽屉 */
@media (max-width:899px){
  body{padding-top:var(--bar-h);}

  .rail{
    inset:0 0 auto 0;
    width:auto;height:var(--bar-h);
    border-right:0;border-bottom:var(--hair);
    background:rgba(10,12,16,.94);
    -webkit-backdrop-filter:blur(12px);
    backdrop-filter:blur(12px);
  }
  .rail::after{display:none;}
  .rail__inner{
    flex-direction:row;align-items:center;
    height:100%;padding:0 16px;
  }
  .rail__brand{display:flex;align-items:baseline;gap:8px;padding-inline:0;}
  .rail__brand-mark{font-size:18px;letter-spacing:.04em;}
  .rail__brand-mark::after{display:none;}
  .rail__brand-sub{margin-top:0;font-size:11px;letter-spacing:.2em;}
  .rail__descriptor{display:none;}
  .rail__toggle{display:inline-flex;}

  .rail__nav{
    position:fixed;
    top:var(--bar-h);left:0;bottom:0;
    width:min(86vw,360px);
    margin:0;padding:20px 16px 118px;
    background:var(--char);
    border-right:var(--hair);
    overflow-y:auto;
    transform:translateX(-102%);
    visibility:hidden;
    transition:transform .26s var(--ease),visibility .26s var(--ease);
    z-index:70;
  }
  .rail__link{padding:14px 16px 14px 14px;border-left-width:3px;}
  .rail__idx{font-size:11px;}
  .rail__label{font-size:15px;margin-top:4px;}

  .rail__cta{
    position:fixed;
    left:0;bottom:0;
    width:min(86vw,360px);
    margin:0;padding:16px 18px;
    flex-direction:row;align-items:center;justify-content:space-between;
    font-size:14px;gap:12px;
    transform:translateX(-102%);
    visibility:hidden;
    transition:transform .26s var(--ease),visibility .26s var(--ease);
    z-index:71;
  }
  .rail[data-open] .rail__nav,
  .rail[data-open] .rail__cta{transform:none;visibility:visible;}

  .rail[data-open]::before{
    content:"";position:fixed;
    inset:var(--bar-h) 0 0 0;
    z-index:65;background:rgba(10,12,16,.66);
  }
  body.is-locked{overflow:hidden;}

  .read-bar{left:0;top:var(--bar-h);}
}

/* 手机 */
@media (max-width:640px){
  .grid--12{grid-template-columns:repeat(2,minmax(0,1fr));}
  .site-foot__inner{grid-template-columns:1fr;gap:30px;}
  .foot-col--addr{grid-column:auto;}
  .site-foot__base-inner{flex-direction:column;align-items:flex-start;gap:6px;}
  .site-foot__base-inner .foot-base__item:last-child{color:var(--slate);}
  .crumb{font-size:11px;}
}

@media (min-width:641px) and (max-width:1023px){
  .site-foot__inner{grid-template-columns:1fr 1fr;}
  .foot-col--addr{grid-column:1 / -1;}
}

/* ==========================================================================
   15. 无障碍：降低动效
   ========================================================================== */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .js [data-reveal]{opacity:1;transform:none;}
  .read-bar__fill{transition:none;}
  .rail__nav,
  .rail__cta{transition:none;}
}

/* 打印与浅底长文页兜底 */
@media print{
  .rail,.read-bar,.site-foot__base{display:none;}
  body{padding:0;background:#fff;color:#111;}
}