/* ==========================================================================
   云开赛事 · 共享样式 /assets/site.css
   坐标：从东南沿海到天山脚下的一条横向信号带
   ========================================================================== */

/* ---------- 变量 ---------- */
:root{
  --ink:#06192B;
  --ocean:#0E3A5C;
  --mist:#D8EDEA;
  --paper:#F8FCFB;
  --signal:#FF5A2B;
  --signal-soft:#FFE1D6;
  --data:#0FA37F;
  --data-soft:#DFF5EE;
  --ridge:#7E96A8;
  --night:#04101C;
  --amber:#C8791A;

  --r-sm:12px;
  --r-card:20px;
  --r-shell:28px;
  --r-pill:999px;

  --wrap:1220px;
  --gut:clamp(16px,4vw,40px);
  --header-pad:clamp(84px,8vw,104px);

  --shadow-1:0 1px 0 rgba(6,25,43,.04), 0 18px 40px -26px rgba(6,25,43,.75);
  --shadow-2:0 1px 0 rgba(6,25,43,.05), 0 22px 44px -28px rgba(6,25,43,.9);
  --shadow-lift:0 12px 34px -18px rgba(6,25,43,.55);

  --ff-display:"Source Han Sans SC Heavy","Noto Sans SC","PingFang SC","HarmonyOS Sans",system-ui,-apple-system,"Microsoft YaHei",sans-serif;
  --ff-serif:"Source Han Serif SC","Noto Serif SC","Songti SC",Georgia,"Times New Roman",serif;
  --ff-mono:"JetBrains Mono","SFMono-Regular",ui-monospace,Menlo,Consolas,"Courier New",monospace;
  --ff-body:"HarmonyOS Sans","PingFang SC",-apple-system,system-ui,"Microsoft YaHei","Noto Sans SC",sans-serif;

  --ease:ease-out;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding-top:var(--header-pad);
  font-family:var(--ff-body);
  font-size:17px;
  line-height:1.75;
  color:var(--ocean);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img,picture,svg,video,canvas{max-width:100%;display:block;}
button,input,select,textarea{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,h5{
  margin:0;
  font-family:var(--ff-display);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.1;
  color:var(--ink);
}
p{margin:0 0 1.05em;}
p:last-child{margin-bottom:0;}
a{color:var(--ocean);text-decoration-thickness:1px;text-underline-offset:3px;}
a:hover{color:var(--signal);}
strong{font-weight:700;color:var(--ink);}
hr{border:0;height:1px;background:rgba(6,25,43,.12);margin:clamp(28px,4vw,54px) 0;}

/* ---------- 焦点与无障碍 ---------- */
:focus{outline:none;}
:focus-visible{
  outline:2px solid var(--signal);
  outline-offset:2px;
  border-radius:6px;
}
.skip-link{
  position:fixed;
  top:10px;left:50%;
  transform:translate(-50%,-200%);
  z-index:300;
  display:inline-flex;align-items:center;
  padding:11px 22px;
  background:var(--ink);
  color:var(--paper);
  font-size:14px;font-weight:700;
  text-decoration:none;
  border-radius:var(--r-pill);
  box-shadow:var(--shadow-2);
  transition:transform .22s var(--ease),color .22s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:translate(-50%,0);color:var(--paper);}

/* ==========================================================================
   头部：悬浮胶囊导航
   ========================================================================== */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:200;
  display:flex;
  justify-content:center;
  padding:14px var(--gut) 0;
  pointer-events:none;
}
.header-shell{
  pointer-events:auto;
  position:relative;
  display:grid;
  grid-template-columns:auto 1fr auto;
  align-items:center;
  gap:clamp(10px,2vw,26px);
  width:min(var(--wrap),100%);
  padding:10px 12px 10px 20px;
  background:rgba(248,252,251,.9);
  border:1px solid rgba(6,25,43,.1);
  border-radius:var(--r-pill);
  box-shadow:var(--shadow-1);
  -webkit-backdrop-filter:blur(16px) saturate(1.25);
  backdrop-filter:blur(16px) saturate(1.25);
  transition:padding .28s var(--ease),background .28s var(--ease),
             box-shadow .28s var(--ease),border-color .28s var(--ease);
}
.site-header.is-condensed .header-shell{
  padding:6px 10px 6px 16px;
  background:rgba(248,252,251,.97);
  border-color:rgba(6,25,43,.14);
  box-shadow:var(--shadow-2);
}

/* 品牌字标 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:11px;
  padding:4px 10px 4px 2px;
  border-radius:var(--r-pill);
  text-decoration:none;
  color:var(--ink);
  min-width:0;
}
.brand:hover{color:var(--ink);}
.brand-mark{
  position:relative;
  flex:none;
  width:32px;height:32px;
  border-radius:11px;
  background:
    radial-gradient(circle at 74% 26%,var(--signal) 0 3px,transparent 3.6px),
    linear-gradient(148deg,var(--ocean) 0%,var(--ink) 58%,var(--data) 100%);
  box-shadow:inset 0 0 0 1px rgba(248,252,251,.28);
}
.brand-mark::after{
  content:"";
  position:absolute;left:6px;right:6px;bottom:8px;height:9px;
  background:var(--mist);
  opacity:.9;
  clip-path:polygon(0 100%,16% 34%,34% 74%,56% 8%,76% 60%,100% 22%,100% 100%,0 100%);
}
.brand-text{display:flex;flex-direction:column;line-height:1.05;min-width:0;}
.brand-name{
  font-family:var(--ff-display);
  font-size:17px;
  font-weight:800;
  letter-spacing:.02em;
  color:var(--ink);
  white-space:nowrap;
}
.brand-sub{
  font-family:var(--ff-mono);
  font-size:10.5px;
  letter-spacing:.2em;
  color:var(--ridge);
  text-transform:uppercase;
  white-space:nowrap;
}

/* 导航 */
.site-nav{display:flex;justify-content:center;min-width:0;}
.nav-list{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:2px;
}
.nav-list a{
  position:relative;
  display:block;
  padding:9px 13px;
  border-radius:var(--r-pill);
  font-size:15px;
  font-weight:500;
  color:var(--ocean);
  text-decoration:none;
  white-space:nowrap;
  transition:background .22s var(--ease),color .22s var(--ease);
}
.nav-list a::after{
  content:"";
  position:absolute;
  left:50%;bottom:5px;
  width:0;height:3px;
  border-radius:2px;
  background:var(--signal);
  transform:translateX(-50%);
  transition:width .24s var(--ease);
}
.nav-list a:hover{background:var(--mist);color:var(--ink);}
.nav-list a:hover::after{width:14px;}
.nav-list a[aria-current="page"]{
  background:var(--signal-soft);
  color:var(--ink);
  font-weight:700;
}
.nav-list a[aria-current="page"]::after{width:18px;}

/* 头部动作 */
.header-actions{
  display:flex;
  align-items:center;
  justify-self:end;
  gap:8px;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border:1px solid transparent;
  border-radius:var(--r-pill);
  font-family:var(--ff-body);
  font-size:15px;
  font-weight:700;
  line-height:1.2;
  text-decoration:none;
  cursor:pointer;
  transition:transform .22s var(--ease),background .22s var(--ease),
             color .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.btn--signal{
  background:var(--signal);
  color:var(--ink);
  box-shadow:0 10px 24px -14px rgba(255,90,43,.95);
}
.btn--signal:hover{
  background:#FF7147;
  color:var(--ink);
  transform:translateY(-2px);
}
.btn--ghost{
  background:transparent;
  color:var(--ink);
  border-color:rgba(6,25,43,.22);
}
.btn--ghost:hover{
  background:var(--ink);
  color:var(--paper);
  border-color:var(--ink);
  transform:translateY(-2px);
}
.btn--quiet{background:var(--data-soft);color:var(--ink);}
.btn--quiet:hover{background:var(--data);color:var(--paper);transform:translateY(-2px);}
.btn--mini{padding:9px 17px;font-size:14px;}

/* ---------- 移动导航按钮 ---------- */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 16px;
  background:var(--ink);
  color:var(--paper);
  border:1px solid var(--ink);
  border-radius:var(--r-pill);
  font-size:14px;
  font-weight:700;
  cursor:pointer;
  transition:background .22s var(--ease),border-color .22s var(--ease);
}
.nav-toggle:hover{background:var(--ocean);border-color:var(--ocean);color:var(--paper);}
.nav-toggle-bars{
  position:relative;
  flex:none;
  width:16px;height:10px;
}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;left:0;right:0;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:transform .24s var(--ease),top .24s var(--ease);
}
.nav-toggle-bars::before{top:0;}
.nav-toggle-bars::after{top:8px;}
.site-header[data-open] .nav-toggle-bars::before{top:4px;transform:rotate(42deg);}
.site-header[data-open] .nav-toggle-bars::after{top:4px;transform:rotate(-42deg);}
.nav-toggle-label{white-space:nowrap;}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer{
  position:relative;
  margin-top:clamp(56px,8vw,120px);
  padding:0 var(--gut);
  background:var(--ink);
  color:var(--mist);
  border-radius:var(--r-shell) var(--r-shell) 0 0;
  overflow:hidden;
}
.footer-ridge{
  position:relative;
  height:clamp(64px,8vw,116px);
  margin:0 calc(var(--gut) * -1);
  color:var(--ocean);
}
.footer-ridge svg{width:100%;height:100%;display:block;}
.footer-ridge path{fill:currentColor;opacity:.62;}
.footer-ridge::after{
  content:"";
  position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,90,43,.6) 38%,rgba(15,163,127,.5) 76%,transparent);
}
.footer-wrap{
  width:min(var(--wrap),100%);
  margin:0 auto;
  display:grid;
  grid-template-columns:minmax(240px,1.05fr) 1.5fr;
  gap:clamp(28px,5vw,64px);
  padding:clamp(30px,4.6vw,54px) 0 clamp(24px,3.6vw,42px);
}
.footer-lead{display:flex;flex-direction:column;gap:16px;min-width:0;}
.brand--footer{padding-left:0;}
.brand--footer .brand-name{color:var(--paper);}
.brand--footer .brand-sub{color:var(--ridge);}
.brand--footer:hover .brand-name{color:var(--paper);}
.footer-note{
  margin:0;
  font-family:var(--ff-serif);
  font-size:16px;
  line-height:1.7;
  color:rgba(216,237,234,.76);
  max-width:34ch;
}
.footer-contact{display:grid;gap:8px;}
.footer-contact li{
  display:flex;
  gap:10px;
  align-items:flex-start;
  font-size:14.5px;
  line-height:1.6;
  color:rgba(216,237,234,.82);
  word-break:break-word;
}
.footer-contact-key{
  flex:none;
  min-width:40px;
  padding-top:2px;
  font-family:var(--ff-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--signal);
}
.footer-contact .mono{color:var(--paper);}
.footer-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(18px,3vw,36px);
}
.footer-col{min-width:0;}
.footer-col-title{
  margin:0 0 16px;
  font-family:var(--ff-mono);
  font-size:11.5px;
  font-weight:600;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--signal);
}
.footer-list{display:grid;gap:9px;}
.footer-list a{
  display:inline-block;
  font-size:15px;
  color:var(--mist);
  text-decoration:none;
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer-list a:hover{color:var(--paper);transform:translateX(5px);}
.footer-base{
  width:min(var(--wrap),100%);
  margin:0 auto;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  padding:18px 0 26px;
  border-top:1px solid rgba(216,237,234,.16);
  font-family:var(--ff-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:rgba(216,237,234,.62);
}
.footer-legal{margin:0;}

/* ==========================================================================
   通用布局与内容组件
   ========================================================================== */
.container{
  width:min(var(--wrap),100%);
  margin-inline:auto;
  padding-inline:var(--gut);
}
.section{padding-block:clamp(46px,6.6vw,104px);}
.section--mist{background:var(--mist);}
.section--ink{background:var(--ink);color:var(--mist);}
.section--ink h2,
.section--ink h3{color:var(--paper);}
.section--ink .lede{color:rgba(216,237,234,.85);}
.section-head{
  display:grid;
  gap:14px;
  max-width:64ch;
  margin-bottom:clamp(24px,3.8vw,48px);
}
.eyebrow{
  margin:0;
  font-family:var(--ff-mono);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--signal);
}
.lede{
  margin:0;
  font-family:var(--ff-serif);
  font-size:clamp(19px,2.05vw,25px);
  line-height:1.62;
  color:var(--ocean);
}
.mono{
  font-family:var(--ff-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}
.coordinate{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--ff-mono);
  font-size:12px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--ridge);
}
.coordinate::before{
  content:"";
  flex:none;
  width:9px;height:9px;
  border-radius:50%;
  background:var(--signal);
  box-shadow:0 0 0 4px var(--signal-soft);
  transition:background .24s var(--ease),box-shadow .24s var(--ease);
}
.coordinate:hover::before{background:var(--data);box-shadow:0 0 0 4px var(--data-soft);}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0 0 20px;
  font-family:var(--ff-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--ridge);
}
.breadcrumb li{display:flex;align-items:center;gap:8px;}
.breadcrumb li+li::before{content:"/";color:var(--ridge);opacity:.6;}
.breadcrumb a{color:var(--ocean);text-decoration:none;}
.breadcrumb a:hover{color:var(--signal);}

.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(14px,2vw,26px);
}
.card{
  background:var(--paper);
  border:1px solid rgba(6,25,43,.09);
  border-radius:var(--r-card);
  padding:clamp(20px,3vw,30px);
  box-shadow:0 1px 0 rgba(6,25,43,.04);
  transition:transform .26s var(--ease),box-shadow .26s var(--ease),border-color .26s var(--ease);
}
.card:hover{
  transform:translateY(-4px);
  border-color:rgba(255,90,43,.4);
  box-shadow:var(--shadow-lift);
}
.panel{
  background:var(--night);
  color:var(--mist);
  border-radius:var(--r-shell);
  padding:clamp(22px,3.4vw,38px);
}
.panel h2,.panel h3{color:var(--paper);}
.panel .mono{color:var(--data);}

/* ---------- 图片容器基础规则（页面阶段放图用） ---------- */
.figure{
  position:relative;
  margin:0;
  border-radius:var(--r-shell);
  overflow:hidden;
  isolation:isolate;
  background:linear-gradient(150deg,var(--mist) 0%,var(--ocean) 62%,var(--ink) 100%);
}
.figure > img,
.figure > svg,
.figure > picture > img,
.figure > video{
  width:100%;height:100%;
  object-fit:cover;
  display:block;
}
.figure::after{
  content:"";
  position:absolute;inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(216,237,234,.15) 1px,transparent 1px),
    linear-gradient(90deg,rgba(216,237,234,.15) 1px,transparent 1px);
  background-size:46px 46px;
  opacity:.55;
}
.figure--panorama{aspect-ratio:3/1;}
.figure--wide{aspect-ratio:21/9;}
.figure--landscape{aspect-ratio:16/9;}
.figure--portrait{aspect-ratio:4/5;}
.figure--square{aspect-ratio:1/1;}
.figure--tinted{
  background:
    radial-gradient(circle at 78% 22%,rgba(255,90,43,.32),transparent 46%),
    linear-gradient(144deg,var(--ocean) 0%,var(--ink) 54%,var(--data) 100%);
}
.figure-caption{
  position:absolute;
  left:18px;right:18px;bottom:15px;
  font-family:var(--ff-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--paper);
  text-shadow:0 1px 10px rgba(4,16,28,.9);
}

/* ==========================================================================
   动效：显现 / 计数 / 降级
   ========================================================================== */
.has-js [data-reveal]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .52s var(--ease),transform .52s cubic-bezier(.22,.7,.28,1);
  transition-delay:var(--reveal-delay,0ms);
}
.has-js [data-reveal].is-visible{opacity:1;transform:none;}

@keyframes kaiyun-draw{
  from{stroke-dashoffset:1400;}
  to{stroke-dashoffset:0;}
}
.ridge-draw path{
  stroke-dasharray:1400;
  animation:kaiyun-draw .6s var(--ease) both;
}

/* ==========================================================================
   品牌装饰：横向信号带
   ========================================================================== */
.signal-band{
  position:relative;
  height:2px;
  width:100%;
  background:linear-gradient(90deg,var(--signal) 0%,var(--data) 46%,var(--ridge) 72%,transparent 100%);
  opacity:.7;
}
.signal-band::before,
.signal-band::after{
  content:"";
  position:absolute;top:50%;
  width:8px;height:8px;
  margin-top:-4px;
  border-radius:50%;
  background:var(--signal);
}
.signal-band::before{left:0;}
.signal-band::after{left:46%;background:var(--data);}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width:1180px) and (min-width:1024px){
  .nav-list a{padding:8px 9px;font-size:14.5px;}
  .header-shell{padding-left:16px;}
  .btn--mini{padding:9px 14px;font-size:13.5px;}
}

@media (max-width:1023px){
  .header-shell{
    grid-template-columns:1fr auto;
    padding:10px 10px 10px 14px;
    border-radius:28px;
  }
  .nav-toggle{display:inline-flex;}
  .site-nav{
    position:absolute;
    top:calc(100% + 12px);
    left:0;right:0;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    padding:12px;
    background:var(--paper);
    border:1px solid rgba(6,25,43,.14);
    border-radius:24px;
    box-shadow:var(--shadow-2);
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s var(--ease);
  }
  .site-header[data-open] .site-nav{
    opacity:1;
    visibility:visible;
    transform:translateY(0);
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:4px;}
  .nav-list a{padding:13px 16px;font-size:16px;}
  .nav-list a::after{left:16px;bottom:10px;transform:none;}
  .nav-list a:hover::after,
  .nav-list a[aria-current="page"]::after{width:14px;}

  .footer-wrap{grid-template-columns:1fr;}
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr));}
}

@media (max-width:640px){
  body{font-size:16px;line-height:1.72;}
  .site-header{padding:10px 12px 0;}
  .brand-sub{display:none;}
  .header-actions .btn--mini{padding:9px 13px;font-size:13px;}
  .nav-toggle{padding:9px 13px;font-size:13px;}
  .nav-toggle-label{display:none;}
  .footer-cols{grid-template-columns:1fr;gap:24px;}
  .footer-base{flex-direction:column;align-items:flex-start;}
  .figure{border-radius:var(--r-card);}
  .figure--panorama{aspect-ratio:16/9;}
}

@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;
  }
  .has-js [data-reveal]{
    opacity:1 !important;
    transform:none !important;
  }
  .ridge-draw path{stroke-dasharray:none;animation:none;}
}