/* =========================================================
   云博赛场 · 共享外壳样式 /assets/site.css
   技术蓝图网格 · 侧边数据轨道 · 复古出版纸白面板
   ========================================================= */

/* ---------- 01 变量 ---------- */
:root{
  --ink:#0B1B33;
  --panel:#12294A;
  --line:#1F3E63;
  --paper:#F3EAD8;
  --paper-ink:#1A1410;
  --cyan:#35E0E0;
  --orange:#FF6A2B;
  --green:#3DD68C;
  --red:#FF4D5E;
  --muted:#93A4BD;
  --text:#E6EDF8;

  --rail-w:264px;
  --bar-h:60px;
  --status-h:38px;

  --font-sans:"Helvetica Neue",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  --shadow-hard:6px 6px 0 rgba(3,8,18,.60);
  --shadow-paper:8px 8px 0 rgba(26,20,16,.35);
  --ease:cubic-bezier(.2,.8,.2,1);
  --z-header:70;
}

/* ---------- 02 重置与基础排版 ---------- */
*,*::before,*::after{ box-sizing:border-box; }

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--bar-h) + var(--status-h) + 16px);
}

body{
  margin:0;
  min-height:100%;
  color:var(--text);
  font:400 16px/1.75 var(--font-sans);
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  background-color:var(--ink);
  background-image:
    linear-gradient(to right, rgba(31,62,99,.50) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(31,62,99,.50) 1px, transparent 1px);
  background-size:48px 48px;
  overflow-x:hidden;
}

body.is-locked{ overflow:hidden; }

[hidden]{ display:none !important; }

h1,h2,h3,h4,p,figure,blockquote{ margin:0; }

img,svg{ display:block; max-width:100%; height:auto; }

a{ color:var(--cyan); text-decoration:none; transition:color .16s var(--ease); }
a:hover{ color:#7CF3F3; }

button{ font:inherit; color:inherit; }

:focus-visible{ outline:2px solid var(--cyan); outline-offset:2px; }
#main-content:focus-visible{ outline-offset:4px; }

h1,.h1{ font-size:clamp(30px,5vw,44px); font-weight:800; line-height:1.15; letter-spacing:-.02em; }
h2,.h2{ font-size:clamp(24px,3.6vw,32px); font-weight:800; line-height:1.2; letter-spacing:-.02em; }
h3,.h3{ font-size:clamp(20px,2.4vw,24px); font-weight:700; line-height:1.3; letter-spacing:-.015em; }
h4,.h4{ font-size:clamp(16px,1.6vw,18px); font-weight:700; line-height:1.45; letter-spacing:-.01em; }

.num{ font-family:var(--font-mono); font-variant-numeric:tabular-nums; letter-spacing:.02em; }

.label{
  display:inline-block;
  font:400 12px/1.5 var(--font-mono);
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--muted);
}

/* ---------- 03 布局容器 ---------- */
.wrap{
  width:100%;
  max-width:1180px;
  margin:0 auto;
  padding:0 20px;
}

main,.site-main{
  display:block;
  margin-left:0;
  padding:calc(var(--bar-h) + var(--status-h) + 28px) 0 72px;
}

.grid{ display:grid; gap:22px; }
.grid--2{ grid-template-columns:repeat(auto-fit,minmax(280px,1fr)); }
.grid--3{ grid-template-columns:repeat(auto-fit,minmax(240px,1fr)); }
.grid--4{ grid-template-columns:repeat(auto-fit,minmax(190px,1fr)); }

.section{ padding:44px 0; }
.section__head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:14px;
  padding-bottom:12px;
  margin-bottom:24px;
  border-bottom:1px solid var(--line);
}
.section__title{ font-size:clamp(22px,3.2vw,32px); font-weight:800; letter-spacing:-.02em; line-height:1.2; }

.rule{ height:1px; margin:26px 0; border:0; background:var(--line); }

/* ---------- 04 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:flex-start;
  gap:8px;
  padding:12px 20px;
  border:2px solid var(--line);
  background:transparent;
  color:var(--text);
  font:700 14px/1 var(--font-sans);
  letter-spacing:.02em;
  cursor:pointer;
  transition:transform .16s var(--ease),box-shadow .16s var(--ease),
             background-color .16s var(--ease),color .16s var(--ease),
             border-color .16s var(--ease);
}
.btn:hover{ transform:translate(-2px,-2px); color:var(--text); }

.btn--primary{
  background:var(--orange);
  border-color:#0B1B33;
  color:#0B1B33;
  box-shadow:4px 4px 0 rgba(53,224,224,.85);
}
.btn--primary:hover{ background:#FF7F49; color:#0B1B33; box-shadow:6px 6px 0 rgba(53,224,224,.95); }

.btn--ghost{ border-color:var(--line); background:rgba(31,62,99,.30); color:#D8E4F5; }
.btn--ghost:hover{ border-color:var(--cyan); color:var(--cyan); }

.btn--cyan{ background:var(--cyan); border-color:#04121F; color:#04121F; box-shadow:4px 4px 0 rgba(3,8,18,.7); }
.btn--cyan:hover{ background:#62EDED; color:#04121F; }

.btn--block{ width:100%; justify-content:center; }

/* ---------- 05 卡片 / 纸面 / 标签 ---------- */
.card{
  position:relative;
  padding:22px;
  background:var(--panel);
  border:2px solid var(--line);
  box-shadow:var(--shadow-hard);
}
.card--accent{ border-color:var(--cyan); }
.card--paper{
  background:var(--paper);
  color:var(--paper-ink);
  border-color:var(--paper-ink);
  box-shadow:var(--shadow-paper);
}
.card--paper a{ color:#0B5063; }

.panel-paper{
  padding:clamp(20px,3vw,34px);
  background:var(--paper);
  color:var(--paper-ink);
  border:2px solid var(--paper-ink);
  box-shadow:10px 10px 0 rgba(3,8,18,.85);
}
.panel-paper p{ font-size:15px; line-height:1.8; }
.panel-paper h2,.panel-paper h3{ color:var(--paper-ink); }
.panel-paper a{ color:#0B5063; }
.panel-paper a:hover{ color:#0B1B33; text-decoration:underline; text-underline-offset:3px; }

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 9px;
  border:1px solid var(--line);
  background:rgba(31,62,99,.40);
  font:400 11px/1.5 var(--font-mono);
  letter-spacing:.10em;
  color:#BFD2EC;
}
.tag--ok{ color:var(--green); border-color:rgba(61,214,140,.50); background:rgba(61,214,140,.10); }
.tag--warn{ color:var(--red); border-color:rgba(255,77,94,.50); background:rgba(255,77,94,.10); }
.tag--hot{ color:var(--orange); border-color:rgba(255,106,43,.55); background:rgba(255,106,43,.12); }

/* ---------- 06 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0 0 18px;
  padding:0;
  list-style:none;
  font:400 12px/1.6 var(--font-mono);
  letter-spacing:.08em;
  color:var(--muted);
}
.breadcrumb li{ display:flex; align-items:center; gap:8px; }
.breadcrumb li + li::before{ content:"/"; color:var(--line); }
.breadcrumb a{ color:var(--muted); }
.breadcrumb a:hover{ color:var(--cyan); }
.breadcrumb [aria-current="page"]{ color:var(--text); }

/* ---------- 07 图片容器（页面阶段复用） ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16/9;
  background:var(--panel);
  border:2px solid var(--line);
  box-shadow:var(--shadow-hard);
}
.media-frame img{ width:100%; height:100%; object-fit:cover; }
.media-frame--wide{ aspect-ratio:21/9; }
.media-frame--tall{ aspect-ratio:3/4; }
.media-frame--square{ aspect-ratio:1/1; }
.media-frame--diagonal{ clip-path:polygon(0 0,100% 0,100% 88%,0 100%); }
.media-frame__cap{
  position:absolute;
  left:0;
  bottom:0;
  padding:8px 12px;
  background:rgba(11,27,51,.88);
  font:400 11px/1.5 var(--font-mono);
  letter-spacing:.10em;
  color:var(--muted);
}

/* ---------- 08 页内章节索引 ---------- */
.scroll-spy{ display:flex; flex-wrap:wrap; gap:6px; }
.scroll-spy__link{
  display:inline-block;
  padding:6px 10px;
  border:1px solid var(--line);
  color:var(--muted);
  font:400 12px/1.4 var(--font-mono);
  letter-spacing:.06em;
}
.scroll-spy__link:hover{ color:var(--text); border-color:var(--muted); }
.scroll-spy__link[data-active]{ color:var(--cyan); border-color:var(--cyan); background:rgba(53,224,224,.08); }

/* ---------- 09 确认清单条目 ---------- */
.check-item{
  display:flex;
  align-items:center;
  gap:10px;
  width:100%;
  padding:10px 12px;
  text-align:left;
  background:rgba(31,62,99,.28);
  border:1px solid var(--line);
  color:var(--text);
  font-size:14px;
  cursor:pointer;
  transition:border-color .18s var(--ease),background-color .18s var(--ease);
}
.check-item:hover{ border-color:var(--muted); }
.check-item__state{
  margin-left:auto;
  font:400 11px/1 var(--font-mono);
  letter-spacing:.10em;
  color:var(--red);
}
.check-item__state::before{ content:"待确认"; }
.check-item[aria-pressed="true"]{ border-color:var(--green); background:rgba(61,214,140,.10); }
.check-item[aria-pressed="true"] .check-item__state{ color:var(--green); }
.check-item[aria-pressed="true"] .check-item__state::before{ content:"已确认"; }

/* ---------- 10 顶部阅读进度 ---------- */
.progress{
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:3px;
  z-index:5;
  background:rgba(31,62,99,.55);
}
.progress__fill{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--orange),#FFB37A);
}

/* ---------- 11 头部外壳 ---------- */
.site-header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:var(--z-header);
  background:#0E2140;
  border-bottom:1px solid var(--line);
}

.skip-link{
  position:absolute;
  left:12px;
  top:-70px;
  z-index:20;
  padding:10px 16px;
  background:var(--cyan);
  color:#04121F;
  font-weight:700;
  border:2px solid #04121F;
  transition:top .16s var(--ease);
}
.skip-link:hover{ color:#04121F; }
.skip-link:focus{ top:12px; }

.site-header__bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  height:var(--bar-h);
  padding:0 16px;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--text);
}
.brand:hover{ color:var(--text); }
.brand__mark{
  display:grid;
  place-items:center;
  flex:none;
  width:36px;
  height:36px;
  background:var(--cyan);
  color:#04121F;
  font:700 12px/1 var(--font-mono);
  letter-spacing:.02em;
  border:2px solid #04121F;
  box-shadow:3px 3px 0 rgba(3,8,18,.7);
}
.brand__text{ display:block; min-width:0; }
.brand__name{
  display:block;
  font-size:17px;
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.2;
}
.brand__line{
  display:block;
  font:400 11px/1.4 var(--font-mono);
  letter-spacing:.08em;
  color:var(--muted);
}

.nav-toggle{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:9px 12px;
  background:rgba(31,62,99,.35);
  border:1px solid var(--line);
  color:var(--text);
  font:700 13px/1 var(--font-sans);
  cursor:pointer;
  transition:border-color .16s var(--ease),color .16s var(--ease);
}
.nav-toggle:hover{ border-color:var(--cyan); color:var(--cyan); }
.nav-toggle__icon{ display:grid; gap:3px; width:16px; }
.nav-toggle__icon i{
  display:block;
  height:2px;
  width:100%;
  background:currentColor;
  transition:transform .18s var(--ease),opacity .18s var(--ease);
}
.site-header[data-open] .nav-toggle__icon i:nth-child(1){ transform:translateY(5px) rotate(45deg); }
.site-header[data-open] .nav-toggle__icon i:nth-child(2){ opacity:0; }
.site-header[data-open] .nav-toggle__icon i:nth-child(3){ transform:translateY(-5px) rotate(-45deg); }
.nav-toggle__text{ letter-spacing:.06em; }

/* 移动端抽屉 */
.site-nav{
  position:fixed;
  top:calc(var(--bar-h) + var(--status-h));
  left:0;
  right:0;
  bottom:0;
  z-index:2;
  padding:18px 16px 34px;
  overflow-y:auto;
  background:linear-gradient(180deg,rgba(18,41,74,.99),rgba(11,27,51,.99));
  border-top:1px solid var(--line);
  opacity:0;
  visibility:hidden;
  transform:translateY(-10px);
  transition:opacity .18s var(--ease),transform .18s var(--ease),visibility .18s var(--ease);
}
.site-header[data-open] .site-nav{ opacity:1; visibility:visible; transform:none; }
.site-header[data-open]::after{
  content:"";
  position:fixed;
  top:calc(var(--bar-h) + var(--status-h));
  left:0;
  right:0;
  bottom:0;
  z-index:1;
  background:rgba(6,13,26,.72);
}

.rail-label{
  margin:18px 0 10px;
  font:400 11px/1.4 var(--font-mono);
  letter-spacing:.14em;
  color:var(--muted);
}
.rail-label:first-child{ margin-top:0; }

.site-nav__list{ list-style:none; margin:0; padding:0; display:grid; gap:2px; }
.site-nav__link{
  display:flex;
  align-items:baseline;
  gap:10px;
  padding:11px 10px 11px 12px;
  color:var(--text);
  font-size:15px;
  font-weight:700;
  letter-spacing:-.01em;
  border-left:2px solid transparent;
  transition:background-color .16s var(--ease),border-color .16s var(--ease),color .16s var(--ease);
}
.site-nav__link:hover{ background:rgba(53,224,224,.08); border-left-color:var(--cyan); color:#fff; }
.site-nav__link[aria-current="page"]{
  background:rgba(53,224,224,.12);
  border-left-color:var(--orange);
  color:var(--cyan);
}
.site-nav__idx{ font:400 11px/1 var(--font-mono); letter-spacing:.10em; color:var(--muted); }
.site-nav__link[aria-current="page"] .site-nav__idx{ color:var(--orange); }

.rail-links{ list-style:none; margin:0; padding:0; display:flex; flex-wrap:wrap; gap:6px; }
.rail-links__a{
  display:inline-block;
  padding:6px 10px;
  background:rgba(31,62,99,.35);
  border:1px solid var(--line);
  color:#CFE0F5;
  font-size:13px;
  font-weight:600;
  transition:border-color .16s var(--ease),color .16s var(--ease);
}
.rail-links__a:hover{ border-color:var(--cyan); color:var(--cyan); }

.utility{
  list-style:none;
  display:grid;
  gap:6px;
  margin:20px 0 0;
  padding:14px 0 0;
  border-top:1px dashed var(--line);
}
.utility__action{
  display:flex;
  align-items:center;
  gap:8px;
  color:var(--muted);
  font-size:13px;
}
.utility__action::before{ content:"›"; color:var(--cyan); font-family:var(--font-mono); }
.utility__action:hover{ color:var(--text); }

.site-nav__cta{ margin-top:18px; }

.rail-coords{
  margin-top:22px;
  font:400 11px/1.9 var(--font-mono);
  letter-spacing:.10em;
  color:var(--line);
}

/* 状态条 */
.status-bar{
  display:flex;
  align-items:center;
  gap:14px;
  height:var(--status-h);
  padding:0 14px;
  background:#0A1729;
  border-bottom:1px solid var(--line);
  overflow-x:auto;
  white-space:nowrap;
  -webkit-overflow-scrolling:touch;
}
.status-bar::-webkit-scrollbar{ display:none; }
.status-bar__tag{
  flex:none;
  font:400 11px/1 var(--font-mono);
  letter-spacing:.14em;
  color:var(--orange);
}
.status-bar__list{ display:flex; gap:18px; list-style:none; margin:0; padding:0; }
.status-bar__item{ display:flex; align-items:baseline; gap:6px; font-size:12.5px; color:#C6D6EC; }
.status-bar__key{ font:400 11px/1 var(--font-mono); letter-spacing:.12em; color:var(--muted); }
.status-bar__val{ color:#fff; font-weight:700; }
.status-bar__unit{ font-size:11px; color:var(--muted); }
.status-bar__link{
  margin-left:auto;
  padding-left:14px;
  color:var(--cyan);
  font-size:12.5px;
  font-weight:700;
  border-bottom:1px solid rgba(53,224,224,.45);
}
.status-bar__link:hover{ color:#7CF3F3; }

/* ---------- 12 页脚 ---------- */
.site-footer{
  margin-left:0;
  padding:44px 0 24px;
  background:#081426;
  border-top:1px solid var(--line);
}
.site-footer__inner{ display:grid; gap:30px; }

.site-footer__brand .brand{ margin-bottom:14px; }
.site-footer__tail{
  max-width:34ch;
  font-size:14px;
  color:var(--muted);
  line-height:1.8;
}
.site-footer__quick{ margin-top:16px; }

.site-footer__cols{
  display:grid;
  gap:24px;
  grid-template-columns:repeat(auto-fit,minmax(160px,1fr));
}
.site-footer__col-title{
  margin-bottom:12px;
  font:400 11px/1.4 var(--font-mono);
  letter-spacing:.14em;
  color:var(--orange);
}
.site-footer__links{ list-style:none; margin:0; padding:0; display:grid; gap:8px; }
.site-footer__links a{ color:#C7D6EC; font-size:14px; }
.site-footer__links a:hover{ color:var(--cyan); }

.contact-list{ list-style:none; margin:0; padding:0; display:grid; gap:10px; }
.contact-list__row{ display:grid; gap:2px; }
.contact-list__key{
  font:400 11px/1.4 var(--font-mono);
  letter-spacing:.12em;
  color:var(--muted);
}
.contact-list__val{ font-size:13.5px; color:#DCE6F5; word-break:break-word; }
.contact-note{
  margin-top:14px;
  font-size:12.5px;
  line-height:1.8;
  color:var(--muted);
}

.site-footer__base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 18px;
  margin-top:30px;
  padding-top:18px;
  border-top:1px dashed var(--line);
  font:400 12px/1.7 var(--font-mono);
  letter-spacing:.06em;
  color:var(--muted);
}
.site-footer__icp{ color:#BFD2EC; }
.site-footer__copy{ color:var(--muted); }
.site-footer__legal{ display:flex; flex-wrap:wrap; gap:14px; list-style:none; margin:0; padding:0; }
.site-footer__legal a{ color:var(--muted); }
.site-footer__legal a:hover{ color:var(--cyan); }

/* ---------- 13 入场显现 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(8px);
  transition:opacity .24s var(--ease),transform .24s var(--ease);
}
[data-reveal][data-revealed]{ opacity:1; transform:none; }

/* ---------- 14 平板 ---------- */
@media (min-width:768px){
  .wrap{ padding:0 32px; }
  .grid{ gap:26px; }
}

/* ---------- 15 桌面：侧边数据轨道 ---------- */
@media (min-width:1024px){
  :root{ --status-h:46px; }

  html{ scroll-padding-top:calc(var(--status-h) + 24px); }

  .site-header{
    top:0;
    bottom:0;
    left:0;
    right:auto;
    width:var(--rail-w);
    display:flex;
    flex-direction:column;
    border-right:1px solid var(--line);
    border-bottom:0;
    overflow-x:hidden;
    overflow-y:auto;
    background:linear-gradient(180deg,#12294A 0%,#0B1B33 100%);
  }
  .site-header[data-open]::after{ content:none; }

  .site-header__bar{
    height:auto;
    padding:22px 20px 18px;
    border-bottom:1px solid var(--line);
  }
  .brand__mark{ width:40px; height:40px; font-size:13px; }
  .brand__name{ font-size:18px; }
  .nav-toggle{ display:none; }

  .site-nav{
    position:static;
    flex:1 0 auto;
    width:auto;
    padding:18px 20px 26px;
    overflow:visible;
    background:transparent;
    border-top:0;
    opacity:1;
    visibility:visible;
    transform:none;
    transition:none;
  }

  .status-bar{
    position:fixed;
    top:0;
    left:var(--rail-w);
    right:0;
    height:var(--status-h);
    padding:0 22px;
  }
  .status-bar__link{ margin-left:auto; }

  main,.site-main{ margin-left:var(--rail-w); padding-top:calc(var(--status-h) + 40px); }
  .site-footer{ margin-left:var(--rail-w); padding-top:52px; }

  .site-footer__inner{
    grid-template-columns:1.05fr 1.9fr 1.25fr;
    gap:34px;
  }
}

/* ---------- 16 无障碍：减少动效 ---------- */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  [data-reveal]{ opacity:1 !important; transform:none !important; }
  .btn:hover{ transform:none; }
}