/* =========================================================
   j9club-jiuyouhui.com.cn — 共享 Site Kit
   /assets/site.css
   夜赛控制台：深空底 + 技术蓝图网格 + 斜切角家族
   ========================================================= */

:root{
  /* 品牌色板 */
  --void:#070D1B;
  --panel:#0E1A33;
  --edge:#1C3157;
  --cool:#A9B7CC;
  --text:#F2F6FC;
  --green:#2FE08A;
  --orange:#FF6A2B;
  --cyan:#35D6E8;
  --grid:#2A3A55;
  --idx:#6E7F99;
  --ink:#0B1220;

  /* 字体 */
  --font-display:"Archivo Black","Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  /* 度量 */
  --gutter:clamp(16px,4vw,48px);
  --shell:1240px;
  --radius:2px;
  --nav-break:940px;
}

/* ---------- 1. 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,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
button,input,select,textarea{font:inherit;color:inherit}
a{color:var(--cyan);text-underline-offset:3px}
table{border-collapse:collapse;width:100%}
[hidden]{display:none !important}

/* ---------- 2. 基础排版与画布 ---------- */
body{
  font-family:var(--font-body);
  font-size:clamp(15px,1.05vw,17px);
  line-height:1.7;
  letter-spacing:.012em;
  color:var(--text);
  background-color:var(--void);
  background-image:linear-gradient(to right,rgba(42,58,85,.30) 1px,transparent 1px);
  background-size:calc(100% / 12) 100%;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.06;
  letter-spacing:-.02em;
  text-wrap:balance;
}
h1{font-size:clamp(36px,5.6vw,72px)}
h2{font-size:clamp(26px,3.4vw,44px)}
h3{font-size:clamp(19px,1.9vw,26px);letter-spacing:-.01em}
h4{font-size:clamp(16px,1.4vw,19px);letter-spacing:0}
p{max-width:68ch}
strong,b{font-weight:700;color:var(--text)}
em{font-style:normal;color:var(--green)}
small{font-size:.82em}
::selection{background:var(--green);color:var(--ink)}

/* ---------- 3. 工具与壳层 ---------- */
.shell{
  width:min(var(--shell),calc(100% - var(--gutter) * 2));
  margin-inline:auto;
}
.visually-hidden{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0;
}
:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:1px;
}
.skip-link{
  position:absolute;
  top:8px;left:8px;z-index:200;
  padding:11px 18px;
  background:var(--green);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:13px;font-weight:700;line-height:1;
  text-decoration:none;
  border-radius:var(--radius);
  transform:translateY(-180%);
  transition:transform .18s ease;
}
.skip-link:focus,
.skip-link:focus-visible{transform:translateY(0);outline-offset:2px}

/* ---------- 4. 页头 ---------- */
.site-head{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(7,13,27,.94);
  -webkit-backdrop-filter:blur(12px) saturate(120%);
  backdrop-filter:blur(12px) saturate(120%);
  border-bottom:1px solid var(--edge);
}

/* 4.1 上层遥测条 */
.head-utility{
  border-bottom:1px solid rgba(28,49,87,.72);
  background:linear-gradient(90deg,rgba(14,26,51,.9) 0%,rgba(7,13,27,.35) 58%,rgba(14,26,51,.9) 100%);
}
.head-utility-in{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  min-height:36px;
}
.head-brandline{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--cool);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
  max-width:none;
}
.head-status{
  display:flex;
  align-items:center;
  gap:18px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--idx);
  flex:none;
}
.head-status-item{
  display:inline-flex;
  align-items:center;
  gap:7px;
  white-space:nowrap;
}
.status-dot{
  width:6px;height:6px;flex:none;
  border-radius:50%;
  background:var(--green);
  box-shadow:0 0 0 3px rgba(47,224,138,.16);
}

/* 4.2 下层主导航 */
.head-main{position:relative}
.head-main-in{
  display:flex;
  align-items:center;
  gap:clamp(14px,3vw,36px);
  min-height:74px;
}
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  flex:none;
  text-decoration:none;
  color:var(--text);
}
.brand-mark{
  display:grid;
  place-items:center;
  width:42px;height:42px;
  background:var(--green);
  color:var(--ink);
  font-family:var(--font-display);
  font-size:15px;
  letter-spacing:-.03em;
  clip-path:polygon(0 0,100% 0,100% 68%,74% 100%,0 100%);
  transition:background-color .18s ease;
}
.brand:hover .brand-mark,
.brand:focus-visible .brand-mark{background:var(--cyan)}
.brand:focus-visible .brand-mark{outline:2px solid var(--cyan);outline-offset:-4px}
.brand-text{display:grid;gap:2px}
.brand-name{font-size:16px;font-weight:800;letter-spacing:.02em;line-height:1.2}
.brand-sub{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--idx);
  line-height:1;
}

.site-nav{
  display:flex;
  align-items:center;
  gap:clamp(10px,2vw,26px);
  margin-left:auto;
}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-item{display:flex}
.nav-link{
  position:relative;
  display:inline-block;
  padding:9px 11px;
  font-size:14.5px;
  color:var(--cool);
  text-decoration:none;
  white-space:nowrap;
  transition:color .16s ease;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:11px;right:11px;bottom:0;
  height:2px;
  background:var(--green);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .18s ease;
}
.nav-link:hover,
.nav-link:focus-visible{color:var(--text)}
.nav-link:hover::after,
.nav-link:focus-visible::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--text);font-weight:600}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}

/* 4.3 移动菜单按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  margin-left:auto;
  padding:9px 13px;
  background:transparent;
  border:1px solid var(--edge);
  border-radius:var(--radius);
  color:var(--text);
  font-family:var(--font-body);
  font-size:13px;font-weight:600;line-height:1;
  cursor:pointer;
  transition:border-color .16s ease,color .16s ease;
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle-bars{
  position:relative;
  display:block;
  width:16px;height:10px;flex:none;
}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;left:0;right:0;
  height:1.5px;
  background:var(--green);
  transition:transform .18s ease;
}
.nav-toggle-bars::before{top:0}
.nav-toggle-bars::after{bottom:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{transform:translateY(4px) rotate(24deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{transform:translateY(-4px) rotate(-24deg)}
.nav-toggle-label{letter-spacing:.08em}

/* 4.4 滚动进度线 */
.head-progress{
  position:absolute;
  left:0;bottom:-1px;
  width:0;height:2px;
  background:linear-gradient(90deg,var(--green),var(--cyan));
  pointer-events:none;
}

/* ---------- 5. 页脚 ---------- */
.site-foot{
  position:relative;
  margin-top:clamp(56px,8vw,104px);
  padding-top:clamp(40px,6vw,72px);
  background:
    linear-gradient(180deg,rgba(14,26,51,.78) 0%,rgba(7,13,27,.98) 48%,#050912 100%),
    var(--void);
  border-top:1px solid var(--edge);
}
.site-foot::before{
  content:"";
  position:absolute;
  top:0;left:0;
  width:min(260px,42vw);
  height:2px;
  background:linear-gradient(90deg,var(--green),var(--cyan));
}
.foot-grid{
  display:grid;
  grid-template-columns:minmax(0,1.9fr) repeat(3,minmax(0,1fr));
  gap:clamp(28px,4vw,56px);
  padding-bottom:clamp(36px,5vw,60px);
}
.foot-brand{
  display:grid;
  align-content:start;
  gap:12px;
}
.foot-logo{
  font-family:var(--font-display);
  font-size:clamp(20px,2vw,27px);
  letter-spacing:-.02em;
  color:var(--text);
  text-decoration:none;
  line-height:1.1;
  transition:color .16s ease;
}
.foot-logo:hover{color:var(--green)}
.foot-note{
  font-size:14px;
  line-height:1.75;
  color:var(--cool);
  max-width:32ch;
}
.foot-contact{
  display:grid;
  gap:8px;
  justify-items:start;
  margin-top:2px;
}
.copy-btn{
  display:inline-flex;
  align-items:center;
  flex-wrap:wrap;
  gap:10px;
  max-width:100%;
  padding:7px 10px;
  background:rgba(14,26,51,.62);
  border:1px solid var(--edge);
  border-radius:var(--radius);
  color:var(--cool);
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.5;
  text-align:left;
  cursor:pointer;
  transition:border-color .16s ease,color .16s ease,background-color .16s ease;
}
.copy-btn:hover{border-color:var(--cyan);color:var(--text)}
.copy-val{overflow-wrap:anywhere}
.copy-hint{
  flex:none;
  padding-left:10px;
  border-left:1px solid var(--edge);
  font-size:9.5px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--idx);
  transition:color .16s ease;
}
.copy-btn[data-copied="true"]{border-color:rgba(255,106,43,.55)}
.copy-btn[data-copied="true"] .copy-hint{color:var(--orange)}
.foot-addr{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.06em;
  color:var(--idx);
  max-width:none;
}

.foot-col{
  display:grid;
  align-content:start;
  gap:14px;
}
.foot-title{
  font-family:var(--font-mono);
  font-size:10.5px;
  font-weight:500;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--idx);
  line-height:1.4;
}
.foot-links{display:grid;gap:9px}
.foot-links a{
  display:inline-block;
  font-size:14.5px;
  color:var(--cool);
  text-decoration:none;
  transition:color .16s ease,transform .16s ease;
}
.foot-links a:hover,
.foot-links a:focus-visible{color:var(--green);transform:translateX(3px)}

.foot-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 26px;
  padding:18px 0 30px;
  border-top:1px solid var(--edge);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.06em;
  color:var(--idx);
}
.foot-legal-item{white-space:nowrap;max-width:none}

/* ---------- 6. 通用组件 ---------- */
/* 6.1 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  border:1px solid transparent;
  border-radius:var(--radius);
  font-family:var(--font-body);
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
  line-height:1.2;
  text-decoration:none;
  white-space:nowrap;
  cursor:pointer;
  transition:background-color .16s ease,color .16s ease,border-color .16s ease,transform .16s ease;
}
.btn:active{transform:translateY(1px)}
.btn-signal{
  background:var(--orange);
  color:var(--ink);
  padding-right:26px;
  clip-path:polygon(0 0,100% 0,100% 70%,93.5% 100%,0 100%);
}
.btn-signal:hover{background:#FF834D}
.btn-signal:focus-visible{outline-offset:-4px}
.btn-ghost{
  background:transparent;
  border-color:var(--edge);
  color:var(--text);
}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-cta{flex:none}

/* 6.2 面包屑 */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--idx);
}
.breadcrumb a{color:var(--cool);text-decoration:none;transition:color .16s ease}
.breadcrumb a:hover,
.breadcrumb a:focus-visible{color:var(--green)}
.breadcrumb-sep{color:var(--edge)}

/* 6.3 分区与标题组 */
.section{position:relative;padding-block:clamp(40px,6vw,80px)}
.section--tight{padding-block:clamp(22px,3vw,36px)}
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:end;
  justify-content:space-between;
  gap:16px 32px;
  margin-bottom:clamp(20px,3vw,36px);
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--idx);
}
.eyebrow::before{
  content:"";
  width:22px;height:1px;flex:none;
  background:var(--green);
}
.section-title{font-size:clamp(24px,3.4vw,42px)}
.lede{
  font-size:clamp(15px,1.2vw,18px);
  line-height:1.75;
  color:var(--cool);
  max-width:62ch;
}
.rule{
  height:1px;
  border:0;
  background:linear-gradient(90deg,var(--edge),rgba(28,49,87,0));
  margin-block:clamp(18px,3vw,32px);
}

/* 6.4 数据面板 */
.panel{
  background:var(--panel);
  border:1px solid var(--edge);
  border-radius:var(--radius);
  padding:clamp(16px,2vw,24px);
  box-shadow:0 1px 0 rgba(255,255,255,.02),0 18px 36px -34px rgba(0,0,0,.95);
}
.panel-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-bottom:12px;
  margin-bottom:14px;
  border-bottom:1px solid var(--edge);
}
.data{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.02em;
  font-variant-numeric:tabular-nums;
  white-space:nowrap;
}

/* 6.5 标签 */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 8px;
  border:1px solid var(--edge);
  border-radius:1px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.14em;
  text-transform:uppercase;
  line-height:1.6;
  color:var(--cool);
}
.tag--green{color:var(--green);border-color:rgba(47,224,138,.42)}
.tag--orange{color:var(--orange);border-color:rgba(255,106,43,.42)}
.tag--cyan{color:var(--cyan);border-color:rgba(53,214,232,.42)}

/* 6.6 图片容器（页面阶段放入 img） */
.figure{
  position:relative;
  display:block;
  margin:0;
  overflow:hidden;
  aspect-ratio:16 / 9;
  background:
    linear-gradient(148deg,rgba(47,224,138,.10) 0%,rgba(7,13,27,0) 48%),
    linear-gradient(24deg,rgba(53,214,232,.10) 0%,rgba(7,13,27,0) 52%),
    var(--panel);
  border:1px solid var(--edge);
  clip-path:polygon(0 0,100% 0,100% 100%,14% 100%,0 88%);
}
.figure img{
  width:100%;height:100%;
  object-fit:cover;
  display:block;
}
.figure::after{
  content:"";
  position:absolute;inset:0;
  pointer-events:none;
  opacity:.32;
  background-image:linear-gradient(to right,rgba(42,58,85,.6) 1px,transparent 1px);
  background-size:calc(100% / 6) 100%;
}
.figure--wide{aspect-ratio:21 / 9}
.figure--tall{aspect-ratio:3 / 4}
.figure-caption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--idx);
  max-width:none;
}

/* 6.7 主题筛选 */
.filter-bar{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
}
.filter-btn{
  padding:7px 13px;
  background:transparent;
  border:1px solid var(--edge);
  border-radius:var(--radius);
  color:var(--cool);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  line-height:1.6;
  cursor:pointer;
  transition:color .16s ease,border-color .16s ease,background-color .16s ease;
}
.filter-btn:hover,
.filter-btn:focus-visible{color:var(--text);border-color:var(--cyan)}
.filter-btn[aria-pressed="true"]{
  color:var(--green);
  border-color:var(--green);
  background:rgba(47,224,138,.11);
}
.filter-count{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--idx);
  white-space:nowrap;
}

/* 6.8 编号步骤 */
.step-list{display:grid;gap:14px}
.step{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:14px;
  align-items:start;
}
.step-num{
  display:grid;
  place-items:center;
  width:30px;height:30px;flex:none;
  background:var(--orange);
  color:var(--ink);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  line-height:1;
  clip-path:polygon(0 0,100% 0,100% 68%,74% 100%,0 100%);
}

/* 6.9 进场显现 */
html.js [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .32s ease,transform .32s ease;
}
html.js [data-reveal][data-shown="true"]{
  opacity:1;
  transform:none;
}

/* ---------- 7. 响应式 ---------- */
@media (max-width:1100px){
  .foot-grid{
    grid-template-columns:minmax(0,1.6fr) repeat(3,minmax(0,1fr));
    gap:clamp(24px,3vw,36px);
  }
}

@media (max-width:1020px){
  .foot-grid{
    grid-template-columns:minmax(0,1.4fr) minmax(0,1fr) minmax(0,1fr);
  }
  .foot-brand{grid-column:1 / -1}
}

@media (max-width:940px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;
    top:100%;left:0;right:0;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    margin-left:0;
    padding:6px var(--gutter) 22px;
    background:rgba(10,18,34,.99);
    border-top:1px solid var(--edge);
    border-bottom:1px solid var(--edge);
    box-shadow:0 24px 48px -24px rgba(0,0,0,.9);
  }
  .site-nav[data-open]{display:flex}
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .nav-item{display:block}
  .nav-link{
    display:block;
    padding:14px 2px;
    font-size:16px;
    border-bottom:1px solid rgba(28,49,87,.7);
  }
  .nav-link::after{
    left:0;right:auto;bottom:0;
    width:38px;
  }
  .nav-cta{
    margin-top:18px;
    width:100%;
    padding-block:13px;
    clip-path:none;
  }
}

@media (max-width:820px){
  .head-brandline{font-size:10px;letter-spacing:.12em}
  .head-status{gap:14px;font-size:10px}
}

@media (max-width:620px){
  .head-utility-in{min-height:32px}
  .head-brandline{display:none}
  .head-status{width:100%;justify-content:space-between;gap:10px}
  .head-status-item:last-child{display:none}
  .head-main-in{min-height:66px}
  .brand-mark{width:38px;height:38px;font-size:14px}
  .brand-name{font-size:15px}
  .brand-sub{font-size:9px;letter-spacing:.16em}
  .foot-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .foot-brand{grid-column:1 / -1}
  .foot-legal{font-size:10.5px;letter-spacing:.04em;gap:8px 18px}
}

@media (max-width:420px){
  .foot-grid{grid-template-columns:minmax(0,1fr)}
  .copy-btn{font-size:11.5px}
}

/* ---------- 8. 动效偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
  html.js [data-reveal]{
    opacity:1;
    transform:none;
    transition:none;
  }
}

@media print{
  .site-head,.site-foot,.skip-link{display:none !important}
  body{background:#fff;color:#000}
}