/* ===========================================================
   球帝带 · CN智造中枢 —— 共享样式 /assets/site.css
   暖纸阅读层 + 深墨版本轨道 + 智造蓝结构线 + 信号橙强调
   =========================================================== */

:root{
  --blue:#0B5FFF;
  --blue-deep:#0846C4;
  --blue-soft:rgba(11,95,255,.10);
  --orange:#FF6B1A;
  --orange-deep:#B23E00;
  --orange-soft:#FFE3D2;
  --ink:#10161F;
  --graphite:#2A2E35;
  --paper:#F4EFE6;
  --card:#FFFFFF;
  --line:#E6E9EF;
  --teal:#0F8C7A;

  --font-display:"Barlow Condensed","Oswald","PingFang SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --font-body:"Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",ui-monospace,Menlo,Consolas,"Courier New",monospace;

  --radius-lg:22px;
  --radius-md:14px;
  --radius-sm:8px;
  --radius-pill:999px;

  --shadow-island:0 10px 30px rgba(16,22,31,.10);
  --shadow-soft:0 2px 10px rgba(16,22,31,.06);
  --shadow-float:0 10px 26px rgba(16,22,31,.16);

  --gutter:clamp(16px,4vw,40px);
  --header-h:74px;
}

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

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h) + 18px);
}

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img,svg,video{max-width:100%;display:block}
button{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}

h1,h2,h3,h4,h5{
  margin:0 0 .55em;
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.16;
  letter-spacing:.01em;
  color:var(--ink);
}
h1{font-size:clamp(34px,5.2vw,56px)}
h2{font-size:clamp(26px,3.6vw,40px)}
h3{font-size:clamp(20px,2.4vw,28px)}
h4{font-size:clamp(17px,1.8vw,20px)}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}

a{color:var(--blue);text-decoration:none;transition:color .18s ease-out}
a:hover{color:var(--blue-deep);text-decoration:underline}

strong,b{font-weight:700}

:focus-visible{
  outline:3px solid var(--orange);
  outline-offset:2px;
  border-radius:4px;
}

/* ---------- 工具类 ---------- */
.visually-hidden{
  position:absolute!important;width:1px;height:1px;
  padding:0;margin:-1px;overflow:hidden;
  clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

.skip-link{
  position:fixed;top:-120px;left:clamp(12px,3vw,32px);
  z-index:200;
  padding:10px 18px;
  background:var(--ink);color:var(--paper);
  border-radius:0 0 var(--radius-md) var(--radius-md);
  font-family:var(--font-mono);font-size:13px;letter-spacing:.06em;
  transition:top .18s ease-out;
}
.skip-link:hover{color:#fff;text-decoration:none}
.skip-link:focus{top:0;color:#fff;text-decoration:none}

/* ---------- 容器与排版模块 ---------- */
.container{
  width:100%;max-width:1320px;
  margin:0 auto;
  padding:0 var(--gutter);
}
.container-narrow{max-width:900px}

.section{padding:clamp(40px,6vw,80px) 0}
.section-title{margin-bottom:.35em}
.section-lede{color:var(--graphite);font-size:17px;max-width:62ch}

.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  margin:0 0 14px;
  font-family:var(--font-mono);font-size:12.5px;
  letter-spacing:.1em;text-transform:uppercase;
  color:var(--blue);
}
.eyebrow::before{
  content:"";width:22px;height:2px;background:var(--orange);flex:0 0 auto;
}

.prose{
  max-width:68ch;
  font-size:17px;line-height:1.85;color:var(--graphite);
}
.prose h2,.prose h3{color:var(--ink);margin-top:1.4em}
.prose ul,.prose ol{margin:0 0 1.2em;padding-left:1.2em;list-style:disc}
.prose ol{list-style:decimal}
.prose li{margin:.35em 0}
.prose code{
  font-family:var(--font-mono);font-size:.92em;
  background:var(--line);padding:1px 6px;border-radius:var(--radius-sm);
}

.mono{font-family:var(--font-mono);letter-spacing:.02em}
.num{font-family:var(--font-mono);font-weight:700;font-variant-numeric:tabular-nums}
.num-accent{font-family:var(--font-mono);font-weight:700;color:var(--orange);font-variant-numeric:tabular-nums}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 18px;
  border:1px solid transparent;border-radius:var(--radius-pill);
  font-family:var(--font-body);font-size:14px;font-weight:600;
  line-height:1.3;text-decoration:none;cursor:pointer;
  transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .18s ease-out,box-shadow .18s ease-out;
}
.btn:hover{text-decoration:none}
.btn:active{transform:translateY(1px)}

.btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 20px rgba(11,95,255,.26)}
.btn-primary:hover{background:var(--blue-deep);color:#fff}

.btn-accent{background:var(--orange);color:#fff;box-shadow:0 8px 20px rgba(255,107,26,.26)}
.btn-accent:hover{background:#E85B0D;color:#fff}

.btn-ghost{background:transparent;color:var(--graphite);border-color:var(--line)}
.btn-ghost:hover{color:var(--blue);border-color:rgba(11,95,255,.45);background:#fff}

.btn-block{width:100%}

/* ---------- 页头 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  padding:0 clamp(12px,3vw,32px);
  background:linear-gradient(180deg,rgba(244,239,230,.97),rgba(244,239,230,.88));
  border-bottom:1px solid rgba(230,233,239,.9);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}
.site-header::before{
  content:"";position:absolute;left:0;right:0;top:0;height:3px;
  background:repeating-linear-gradient(90deg,var(--blue) 0 26px,var(--blue-deep) 26px 30px);
  opacity:.85;
  pointer-events:none;
}
.site-header::after{
  content:"";position:absolute;left:0;top:0;height:3px;width:var(--progress,0%);
  background:var(--orange);
  transition:width .12s linear;
  pointer-events:none;
}

.header-shell{
  position:relative;
  max-width:1320px;margin:0 auto;
  display:flex;align-items:center;gap:clamp(10px,1.6vw,20px);
  padding:12px 0;
  min-height:var(--header-h);
}

.brand-mark{
  flex:0 0 auto;
  display:flex;align-items:center;gap:12px;
  padding:7px 16px 7px 9px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  box-shadow:var(--shadow-island);
  color:var(--ink);text-decoration:none;
  transition:border-color .18s ease-out,transform .18s ease-out;
}
.brand-mark:hover{text-decoration:none;border-color:rgba(11,95,255,.4);transform:translateY(-1px)}

.brand-glyph{
  position:relative;flex:0 0 auto;
  width:42px;height:42px;
  display:grid;place-items:center;
  background:var(--ink);color:#fff;
  border-radius:12px;
  font-family:var(--font-mono);font-size:15px;font-weight:700;letter-spacing:.06em;
}
.brand-glyph::after{
  content:"";position:absolute;right:-3px;top:-3px;
  width:10px;height:10px;border-radius:50%;
  background:var(--orange);border:2px solid var(--card);
}

.brand-text{display:block;min-width:0}
.brand-line{
  display:block;
  font-family:var(--font-display);font-weight:800;
  font-size:17px;line-height:1.2;letter-spacing:.02em;color:var(--ink);
}
.brand-tag{
  display:block;
  font-family:var(--font-mono);font-size:11px;line-height:1.5;
  letter-spacing:.06em;color:var(--graphite);opacity:.72;
}

.nav-island{flex:1 1 auto;display:flex;justify-content:center;min-width:0}
.nav-list{
  display:flex;align-items:center;gap:2px;
  padding:6px;
  background:rgba(255,255,255,.88);
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  box-shadow:var(--shadow-island);
}
.nav-link{
  display:inline-flex;align-items:center;gap:7px;
  padding:8px 14px;border-radius:var(--radius-pill);
  font-size:14.5px;color:var(--graphite);white-space:nowrap;
  transition:background-color .2s ease-out,color .2s ease-out;
}
.nav-link:hover{background:var(--paper);color:var(--ink);text-decoration:none}
.nav-link[aria-current="page"]{background:var(--ink);color:var(--paper)}
.nav-link[aria-current="page"]::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--orange);flex:0 0 auto;
}

.header-actions{
  flex:0 0 auto;margin-left:auto;
  display:flex;align-items:center;gap:10px;
}

.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:9px 15px;
  background:var(--card);
  border:1px solid var(--line);border-radius:var(--radius-pill);
  color:var(--ink);cursor:pointer;
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.06em;
  transition:border-color .18s ease-out;
}
.nav-toggle:hover{border-color:rgba(11,95,255,.45)}
.nav-toggle-bar{
  position:relative;display:block;width:16px;height:2px;border-radius:2px;
  background:var(--ink);transition:background-color .2s ease-out;
}
.nav-toggle-bar::before,
.nav-toggle-bar::after{
  content:"";position:absolute;left:0;width:16px;height:2px;border-radius:2px;
  background:var(--ink);transition:transform .22s ease-out,background-color .22s ease-out;
}
.nav-toggle-bar::before{top:-5px}
.nav-toggle-bar::after{top:5px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar::before{transform:translateY(5px) rotate(45deg);background:var(--orange)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar::after{transform:translateY(-5px) rotate(-45deg);background:var(--orange)}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,96px);
  background:var(--ink);
  color:#E9EDF3;
  overflow:hidden;
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(11,95,255,.10) 1px,transparent 1px),
    linear-gradient(90deg,rgba(11,95,255,.10) 1px,transparent 1px);
  background-size:44px 44px;
  opacity:.55;
}
.footer-track{
  display:block;height:4px;width:100%;
  background:linear-gradient(90deg,var(--blue) 0%,var(--blue-deep) 58%,var(--orange) 100%);
}

.footer-inner{
  position:relative;z-index:1;
  max-width:1320px;margin:0 auto;
  padding:clamp(40px,6vw,72px) var(--gutter) clamp(26px,4vw,44px);
  display:grid;
  grid-template-columns:minmax(240px,1fr) minmax(0,2.3fr);
  gap:clamp(28px,4vw,56px);
}

.footer-brand-line{
  margin:0 0 12px;
  font-family:var(--font-display);font-weight:800;
  font-size:21px;letter-spacing:.02em;color:#fff;
}
.footer-summary{
  margin:0 0 22px;
  max-width:36ch;
  font-size:14.5px;line-height:1.85;color:rgba(233,237,243,.7);
}

.footer-cols{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(186px,1fr));
  gap:clamp(20px,3vw,32px);
  align-content:start;
}
.footer-col{min-width:0}
.footer-col-title{
  position:relative;
  margin:0 0 14px;padding-left:12px;
  font-family:var(--font-mono);font-size:12.5px;font-weight:500;
  letter-spacing:.08em;text-transform:uppercase;
  color:#8FB0FF;
}
.footer-col-title::before{
  content:"";position:absolute;left:0;top:.42em;
  width:5px;height:12px;background:var(--orange);
}
.footer-links li{margin:0 0 8px}
.footer-links a{
  color:rgba(233,237,243,.78);
  font-size:14.5px;
  transition:color .18s ease-out;
}
.footer-links a:hover{color:#fff;text-decoration:none}

.footer-contact-list li{
  display:flex;flex-wrap:wrap;gap:6px 12px;
  margin:0 0 10px;
}
.contact-key{
  flex:0 0 44px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em;
  color:rgba(143,176,255,.9);padding-top:2px;
}
.contact-val{
  flex:1 1 160px;
  font-size:14px;line-height:1.7;color:rgba(233,237,243,.88);
  word-break:break-word;
}
.contact-val.mono{font-family:var(--font-mono)}
.contact-note{
  margin:14px 0 0;padding-left:11px;
  border-left:2px solid var(--orange);
  font-size:12.5px;line-height:1.75;color:rgba(233,237,243,.58);
}

.footer-legal{
  position:relative;z-index:1;
  max-width:1320px;margin:0 auto;
  padding:18px var(--gutter) 26px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;align-items:center;gap:12px 26px;
  font-size:12.5px;color:rgba(233,237,243,.6);
}
.legal-line{margin:0;font-family:var(--font-mono);letter-spacing:.04em}
.legal-links{display:flex;flex-wrap:wrap;gap:8px 20px;margin-left:auto}
.legal-links a{color:rgba(233,237,243,.72);font-size:12.5px}
.legal-links a:hover{color:#fff;text-decoration:none}
.legal-meta{margin:0;flex:1 1 100%;color:rgba(233,237,243,.45);font-size:12px}
.legal-meta .mono{color:var(--orange);font-weight:700}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  margin:0 0 22px;padding:0;
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.06em;
  color:var(--graphite);
}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li + li::before{content:"/";color:rgba(42,46,53,.35)}
.breadcrumb a{color:var(--blue)}

/* ---------- 侧边导览 ---------- */
.rail-layout{
  display:grid;
  grid-template-columns:minmax(184px,236px) minmax(0,1fr);
  gap:clamp(20px,4vw,56px);
  align-items:start;
}
.rail-aside{position:sticky;top:calc(var(--header-h) + 22px)}
.rail-title{
  margin:0 0 12px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  text-transform:uppercase;color:var(--graphite);opacity:.75;
}
.rail-nav{border-left:2px solid var(--line)}
.rail-link{
  display:block;
  margin-left:-2px;padding:8px 0 8px 16px;
  border-left:2px solid transparent;
  font-size:14.5px;line-height:1.6;color:var(--graphite);
  transition:color .18s ease-out,border-color .18s ease-out;
}
.rail-link:hover{color:var(--blue);border-left-color:rgba(11,95,255,.4);text-decoration:none}
.rail-link[aria-current="true"]{
  color:var(--ink);font-weight:600;
  border-left-color:var(--orange);
}
.rail-main{min-width:0}

/* ---------- 卡片 / 标签 ---------- */
.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:clamp(18px,2.4vw,28px);
  box-shadow:var(--shadow-soft);
}
.card-grid{
  display:grid;gap:clamp(14px,2vw,22px);
  grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px;border-radius:var(--radius-pill);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
  background:var(--line);color:var(--graphite);
}
.tag-blue{background:var(--blue-soft);color:var(--blue)}
.tag-accent{background:var(--orange-soft);color:var(--orange-deep)}
.tag-teal{background:rgba(15,140,122,.12);color:var(--teal)}

/* ---------- 表格 ---------- */
.table-wrap{
  overflow-x:auto;
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  background:var(--card);
  -webkit-overflow-scrolling:touch;
}
.data-table{
  width:100%;min-width:560px;
  border-collapse:collapse;
  font-size:14.5px;
}
.data-table th,
.data-table td{
  padding:12px 16px;
  text-align:left;
  border-bottom:1px solid var(--line);
  vertical-align:top;
}
.data-table thead th{
  position:sticky;top:0;z-index:1;
  background:var(--paper);
  font-family:var(--font-mono);font-size:12.5px;font-weight:500;
  letter-spacing:.06em;text-transform:uppercase;color:var(--graphite);
}
.data-table tbody tr:nth-child(even){background:rgba(230,233,239,.34)}
.data-table tbody tr:last-child td{border-bottom:0}
.data-table td.is-num,
.data-table th.is-num{
  font-family:var(--font-mono);font-weight:600;
  font-variant-numeric:tabular-nums;
}

/* ---------- 折叠面板 ---------- */
.fold{
  margin:0 0 10px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  overflow:hidden;
}
.fold-summary{
  display:flex;justify-content:space-between;align-items:flex-start;gap:14px;
  padding:14px 18px;
  cursor:pointer;font-weight:600;line-height:1.6;
  list-style:none;
}
.fold-summary::-webkit-details-marker{display:none}
.fold-summary::after{
  content:"+";flex:0 0 auto;
  font-family:var(--font-mono);color:var(--orange);font-weight:700;
}
.fold[open] .fold-summary::after{content:"–"}
.fold[open] .fold-summary{border-bottom:1px solid var(--line)}
.fold-body{padding:16px 18px;font-size:15.5px;line-height:1.8;color:var(--graphite)}

/* ---------- 标签页 ---------- */
.tab-list{
  display:flex;flex-wrap:wrap;gap:6px;
  margin:0 0 20px;padding:6px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
}
.tab-btn{
  appearance:none;
  padding:8px 16px;
  background:transparent;border:0;border-radius:var(--radius-pill);
  font-family:var(--font-mono);font-size:13px;letter-spacing:.06em;
  color:var(--graphite);cursor:pointer;
  transition:background-color .18s ease-out,color .18s ease-out;
}
.tab-btn:hover{background:var(--paper)}
.tab-btn[aria-selected="true"]{background:var(--ink);color:var(--paper)}
.tab-panel[hidden]{display:none}
.tab-panel{padding-top:4px}

/* ---------- 图版容器 ---------- */
.media-frame{
  position:relative;display:block;width:100%;
  aspect-ratio:16 / 9;
  overflow:hidden;
  border-radius:var(--radius-lg);
  border:1px solid var(--line);
  background:
    linear-gradient(135deg,var(--blue-soft),rgba(255,107,26,.10)),
    var(--card);
}
.media-frame > img,
.media-frame > picture,
.media-frame > picture > img,
.media-frame > div,
.media-frame > span{
  display:block;width:100%;height:100%;object-fit:cover;
}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame--square{aspect-ratio:1 / 1}

/* ---------- 动效与返回顶部 ---------- */
.reveal{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .3s ease-out,transform .3s ease-out;
}
.reveal.is-visible{opacity:1;transform:none}

.back-to-top{
  position:fixed;
  right:clamp(14px,3vw,28px);bottom:clamp(14px,3vw,28px);
  z-index:70;
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 16px;
  background:var(--card);
  border:1px solid var(--line);border-radius:var(--radius-pill);
  color:var(--ink);cursor:pointer;
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.06em;
  box-shadow:var(--shadow-float);
  opacity:0;pointer-events:none;transform:translateY(8px);
  transition:opacity .22s ease-out,transform .22s ease-out,background-color .18s ease-out;
}
.back-to-top.is-visible{opacity:1;pointer-events:auto;transform:none}
.back-to-top:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}

/* ---------- 响应式：平板 ---------- */
@media (max-width:1200px){
  .header-utility{display:none}
}
@media (max-width:1120px){
  .brand-tag{display:none}
  .header-cta-alt{display:none}
  .nav-link{padding:8px 12px;font-size:14px}
}
@media (max-width:980px){
  .footer-inner{grid-template-columns:1fr}
  .rail-layout{grid-template-columns:1fr}
  .rail-aside{position:static}
  .rail-nav{border-left:0;border-top:2px solid var(--line);display:flex;flex-wrap:wrap;gap:4px;padding-top:8px}
  .rail-link{margin:0;border-left:0;border-bottom:2px solid transparent;padding:8px 12px;border-radius:var(--radius-pill);background:var(--card)}
  .rail-link[aria-current="true"]{border-bottom-color:var(--orange);background:var(--orange-soft);color:var(--orange-deep)}
}

/* ---------- 响应式：移动导航 ---------- */
@media (max-width:1000px){
  :root{--header-h:66px}
  .site-header{padding:0 14px}
  .header-shell{gap:10px;padding:10px 0}

  .brand-glyph{width:36px;height:36px;border-radius:10px;font-size:13px}
  .brand-line{font-size:15.5px}
  .brand-mark{padding:6px 12px 6px 7px}

  .nav-island{
    position:absolute;
    left:0;right:0;top:calc(100% + 8px);
    display:none;
    justify-content:stretch;
    padding:0;
  }
  .nav-island[data-open]{display:block}
  .nav-list{
    flex-direction:column;align-items:stretch;gap:4px;
    padding:10px;
    border-radius:20px;
    background:var(--card);
    box-shadow:var(--shadow-float);
  }
  .nav-link{
    justify-content:space-between;
    padding:12px 16px;border-radius:12px;
    font-size:15px;
  }
  .nav-link[aria-current="page"]{background:var(--ink);color:var(--paper)}

  .nav-toggle{display:inline-flex}
  .header-cta{padding:9px 14px;font-size:13.5px}
}

@media (max-width:520px){
  .nav-toggle-label{display:none}
  .header-cta{padding:9px 12px}
  .footer-legal{flex-direction:column;align-items:flex-start}
  .legal-links{margin-left:0}
}

/* ---------- 无障碍动效降级 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .reveal{opacity:1;transform:none}
  .site-header::after{transition:none}
  .back-to-top{transform:none}
}