/* =========================================================
   BIBO 必博体育官网 · /assets/site.css
   共享层：reset / 变量 / 中文排版 / 页头 / 页脚 / 基础组件
   ========================================================= */

/* ---------- 1. 设计变量 ---------- */
:root{
  --ink-900:#07111F;
  --ink-850:#0B1B2E;
  --ink-800:#10263D;
  --ink-700:#24435F;
  --cyan:#27E1C1;
  --cyan-soft:#7CF5E4;
  --amber:#F2B84B;
  --live:#FF5A3C;
  --paper:#E6EDF5;
  --muted:#8FA3B8;

  --font-display:"Alibaba PuHuiTi 3.0 Heavy","Source Han Sans SC Heavy","HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-light:"Source Han Sans SC Light","HarmonyOS Sans SC Light","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono","Roboto Mono",Consolas,"Courier New",monospace;

  --wrap:1200px;
  --dur:160ms;
  --ease:cubic-bezier(.2,.8,.2,1);
  --header-h:74px;
}

/* ---------- 2. reset ---------- */
*,
*::before,
*::after{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:96px;
}

body{
  margin:0;
  min-height:100vh;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:1rem;
  line-height:1.8;
  letter-spacing:.01em;
  background-color:var(--ink-900);
  background-image:
    linear-gradient(rgba(36,67,95,.20) 1px,transparent 1px),
    radial-gradient(120% 78% at 84% -12%,rgba(39,225,193,.10),transparent 62%),
    radial-gradient(90% 60% at -8% 4%,rgba(11,27,46,.92),transparent 72%);
  background-size:100% 88px,100% 100%,100% 100%;
  background-repeat:repeat,no-repeat,no-repeat;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}

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

a{color:inherit;text-decoration:none}

button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}

ul,ol{list-style:none;margin:0;padding:0}

h1,h2,h3,h4,h5{
  margin:0;
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.16;
  letter-spacing:-.01em;
}

p{margin:0 0 1em}
p:last-child{margin-bottom:0}

::selection{background:var(--cyan);color:var(--ink-900)}

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

/* ---------- 3. 跳转链接 ---------- */
.skip-link{
  position:absolute;
  left:16px;
  top:-120px;
  z-index:200;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 20px;
  border-radius:0 0 12px 12px;
  background:var(--cyan);
  color:var(--ink-900);
  font-family:var(--font-display);
  font-size:.9rem;
  letter-spacing:.04em;
  transition:top var(--dur) var(--ease);
}
.skip-link:focus{top:0}

/* ---------- 4. 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(7,17,31,.97);
  border-bottom:1px solid var(--ink-700);
  transition:background-color var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.site-header[data-condensed]{
  border-bottom-color:rgba(39,225,193,.55);
  box-shadow:0 12px 34px rgba(0,0,0,.42);
}

.header-inner{
  max-width:var(--wrap);
  margin:0 auto;
  display:flex;
  align-items:center;
  gap:clamp(14px,2.2vw,34px);
  padding:clamp(12px,1.8vw,18px) clamp(16px,3vw,32px);
  transition:padding var(--dur) var(--ease);
}
.site-header[data-condensed] .header-inner{
  padding-top:8px;
  padding-bottom:8px;
}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  color:var(--paper);
}
.brand__mark{
  width:9px;
  height:34px;
  border-radius:3px;
  background:linear-gradient(180deg,var(--cyan) 0%,var(--cyan-soft) 40%,var(--amber) 100%);
  box-shadow:0 0 20px rgba(39,225,193,.5);
  transition:height var(--dur) var(--ease);
}
.site-header[data-condensed] .brand__mark{height:28px}
.brand__type{display:flex;flex-direction:column;gap:1px}
.brand__primary{
  font-family:var(--font-display);
  font-weight:800;
  font-size:1.02rem;
  line-height:1.25;
  letter-spacing:.04em;
  white-space:nowrap;
}
.brand__secondary{
  font-family:var(--font-mono);
  font-size:.62rem;
  line-height:1.2;
  letter-spacing:.26em;
  color:var(--cyan);
  text-transform:uppercase;
  white-space:nowrap;
}

.header-pulse{
  flex:1 1 auto;
  min-width:40px;
  display:flex;
  align-items:center;
  gap:12px;
  overflow:hidden;
}
.pulse-line{
  flex:1 1 auto;
  height:1px;
  background:linear-gradient(90deg,transparent 0%,rgba(36,67,95,.9) 35%,var(--cyan) 100%);
  opacity:.85;
}
.pulse-line:last-child{
  background:linear-gradient(90deg,var(--cyan) 0%,rgba(36,67,95,.9) 65%,transparent 100%);
}
.pulse-label{
  font-family:var(--font-mono);
  font-size:.62rem;
  letter-spacing:.22em;
  color:var(--muted);
  white-space:nowrap;
}

.site-nav{margin-left:auto;flex:0 1 auto}
.nav-list{
  display:flex;
  align-items:center;
  gap:clamp(6px,1.3vw,22px);
}
.nav-list__item{display:flex}
.nav-list__link{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 4px;
  font-size:.93rem;
  line-height:1.2;
  color:var(--muted);
  border-bottom:2px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.nav-list__link:hover,
.nav-list__link:focus-visible{color:var(--paper)}
.nav-list__link[aria-current="page"]{
  color:var(--cyan);
  border-bottom-color:var(--cyan);
}

.header-tools{
  display:flex;
  align-items:center;
  gap:8px;
  flex:0 0 auto;
}

.dock-toggle{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:44px;
  padding:0 14px;
  border:1px solid var(--ink-700);
  border-radius:999px;
  color:var(--paper);
  font-size:.84rem;
  letter-spacing:.03em;
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.dock-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.dock-toggle[aria-expanded="true"]{
  background:rgba(39,225,193,.12);
  border-color:var(--cyan);
  color:var(--cyan);
}
.dock-toggle__dot{
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--live);
  box-shadow:0 0 0 3px rgba(255,90,60,.2);
  flex:0 0 auto;
}
.dock-toggle__text{white-space:nowrap}

.nav-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:44px;
  height:44px;
  border:1px solid var(--ink-700);
  border-radius:12px;
  transition:border-color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan)}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:18px;
  height:2px;
  border-radius:2px;
  background:var(--paper);
  transition:background-color var(--dur) var(--ease);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;
  height:2px;
  border-radius:2px;
  background:var(--paper);
  transition:transform var(--dur) var(--ease);
}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.site-header[data-open] .nav-toggle__bars{background:transparent}
.site-header[data-open] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg)}

/* ---------- 5. 数据快捷面板 ---------- */
.pulse-dock{
  position:fixed;
  top:94px;
  right:20px;
  z-index:90;
  width:min(304px,calc(100vw - 32px));
  padding:18px;
  border:1px solid var(--ink-700);
  border-radius:18px;
  background:
    radial-gradient(120% 90% at 100% 0%,rgba(39,225,193,.16),transparent 58%),
    linear-gradient(165deg,rgba(16,38,61,.99),rgba(11,27,46,.99));
  box-shadow:0 26px 64px rgba(0,0,0,.6);
  visibility:hidden;
  opacity:0;
  transform:translate3d(14px,-10px,0);
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),visibility var(--dur) linear;
}
.pulse-dock[data-open]{
  visibility:visible;
  opacity:1;
  transform:none;
}
.pulse-dock__head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-bottom:14px;
  padding-bottom:12px;
  border-bottom:1px solid var(--ink-700);
}
.pulse-dock__title{
  margin:0;
  font-family:var(--font-display);
  font-size:.94rem;
  letter-spacing:.05em;
  color:var(--paper);
}
.pulse-dock__close{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:36px;
  height:36px;
  border:1px solid var(--ink-700);
  border-radius:10px;
  font-size:1.15rem;
  line-height:1;
  color:var(--muted);
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.pulse-dock__close:hover{color:var(--cyan);border-color:var(--cyan)}
.pulse-dock__list{display:grid;gap:6px}
.pulse-dock__link{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  min-height:44px;
  padding:0 12px;
  border-radius:10px;
  color:var(--paper);
  font-size:.92rem;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.pulse-dock__link:hover,
.pulse-dock__link:focus-visible{
  background:rgba(39,225,193,.13);
  color:var(--cyan);
}
.pulse-dock__index{
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.08em;
  color:var(--amber);
}
.pulse-dock__note{
  margin:14px 0 0;
  font-size:.75rem;
  line-height:1.6;
  color:var(--muted);
}

/* ---------- 6. 页脚 ---------- */
.site-footer{
  margin-top:clamp(48px,7vw,110px);
  background:var(--ink-850);
  border-top:1px solid var(--ink-700);
}
.footer-top{
  max-width:var(--wrap);
  margin:0 auto;
  padding:clamp(38px,5.5vw,70px) clamp(16px,3vw,32px) clamp(26px,3.5vw,44px);
  display:grid;
  grid-template-columns:minmax(230px,1.25fr) minmax(0,2fr) minmax(210px,.95fr);
  gap:clamp(24px,3.6vw,52px);
}
.footer-brand{display:flex;flex-direction:column;gap:12px}
.footer-brand__mark{
  margin:0;
  font-family:var(--font-display);
  font-size:1.16rem;
  line-height:1.3;
  letter-spacing:.04em;
  color:var(--paper);
}
.footer-brand__tagline{
  margin:0;
  font-size:.92rem;
  line-height:1.75;
  color:var(--muted);
  max-width:30ch;
}
.footer-brand__meta{
  margin:0;
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--cyan);
}
.footer-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(16px,2.4vw,28px);
}
.footer-col{display:flex;flex-direction:column;gap:12px}
.footer-col__title{
  margin:0;
  font-family:var(--font-mono);
  font-size:.72rem;
  font-weight:500;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--amber);
}
.footer-col__list{display:grid;gap:2px}
.footer-col__link{
  display:inline-block;
  min-height:34px;
  line-height:34px;
  font-size:.9rem;
  color:var(--muted);
  transition:color var(--dur) var(--ease);
}
.footer-col__link:hover,
.footer-col__link:focus-visible{color:var(--cyan)}
.footer-contact{display:flex;flex-direction:column;gap:12px}
.footer-contact__list{display:grid;gap:12px}
.footer-contact__row{display:grid;gap:2px}
.footer-contact__key{
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.18em;
  color:var(--muted);
}
.footer-contact__val{
  font-size:.86rem;
  line-height:1.6;
  color:var(--paper);
  word-break:break-word;
}
.footer-bottom{border-top:1px solid var(--ink-700)}
.footer-bottom__inner{
  max-width:var(--wrap);
  margin:0 auto;
  padding:18px clamp(16px,3vw,32px);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 22px;
}
.footer-copy{
  margin:0;
  font-size:.8rem;
  color:var(--muted);
}
.footer-icp{
  margin:0;
  font-family:var(--font-mono);
  font-size:.76rem;
  letter-spacing:.06em;
  color:var(--muted);
}
.footer-legal{display:flex;flex-wrap:wrap;gap:4px 18px}
.footer-legal__link{
  display:inline-block;
  min-height:32px;
  line-height:32px;
  font-size:.8rem;
  color:var(--muted);
  transition:color var(--dur) var(--ease);
}
.footer-legal__link:hover,
.footer-legal__link:focus-visible{color:var(--cyan)}

/* ---------- 7. 基础布局与组件 ---------- */
.wrap{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:clamp(16px,3vw,32px);
}

.section{padding-block:clamp(36px,5.5vw,84px)}

.section__head{
  display:flex;
  flex-direction:column;
  gap:12px;
  margin-bottom:clamp(20px,3vw,36px);
}
.section__title{
  font-size:clamp(1.6rem,3vw,3rem);
  line-height:1.12;
  color:var(--paper);
}
.section__lead{
  max-width:62ch;
  font-size:1rem;
  line-height:1.85;
  color:var(--muted);
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{
  content:"";
  width:24px;
  height:1px;
  background:currentColor;
  flex:0 0 auto;
}

.rule{
  height:1px;
  border:0;
  margin:0;
  background:linear-gradient(90deg,var(--ink-700) 0%,rgba(36,67,95,.15) 70%,transparent 100%);
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:48px;
  padding:0 24px;
  border:1px solid transparent;
  border-radius:999px;
  font-family:var(--font-display);
  font-size:.94rem;
  letter-spacing:.04em;
  transition:transform var(--dur) var(--ease),background-color var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.btn--primary{
  background:linear-gradient(120deg,var(--cyan) 0%,var(--cyan-soft) 100%);
  color:#04121E;
}
.btn--primary:hover{transform:translateY(-1px)}
.btn--ghost{
  border-color:var(--ink-700);
  color:var(--paper);
}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn--amber{
  background:var(--amber);
  color:#1B1200;
}
.btn--amber:hover{transform:translateY(-1px)}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.1em;
  color:var(--muted);
}
.breadcrumb__link{color:var(--muted);transition:color var(--dur) var(--ease)}
.breadcrumb__link:hover{color:var(--cyan)}
.breadcrumb__sep{color:var(--ink-700)}
.breadcrumb__current{color:var(--paper)}

.prose{
  max-width:66ch;
  line-height:1.85;
}
.prose h2{
  margin:2em 0 .6em;
  font-size:clamp(1.4rem,2.4vw,1.95rem);
  color:var(--paper);
}
.prose h3{
  margin:1.6em 0 .5em;
  font-size:clamp(1.08rem,1.8vw,1.3rem);
  color:var(--cyan);
}
.prose p{margin:0 0 1.1em;color:var(--paper)}
.prose ul,
.prose ol{margin:0 0 1.2em;padding-left:1.05em}
.prose li{position:relative;padding-left:.85em;margin-bottom:.4em}
.prose li::before{
  content:"";
  position:absolute;
  left:0;
  top:.85em;
  width:7px;
  height:1px;
  background:var(--cyan);
}
.prose a{
  color:var(--cyan);
  border-bottom:1px solid rgba(39,225,193,.42);
}
.prose strong{color:var(--amber);font-weight:700}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border:1px solid var(--ink-700);
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:.7rem;
  line-height:1.4;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--muted);
}
.tag--live{
  color:var(--live);
  border-color:rgba(255,90,60,.5);
  background:rgba(255,90,60,.1);
}
.tag--amber{
  color:var(--amber);
  border-color:rgba(242,184,75,.45);
  background:rgba(242,184,75,.1);
}

.stat{display:flex;flex-direction:column;gap:6px}
.stat__value{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
  font-size:clamp(1.8rem,3vw,2.6rem);
  line-height:1;
  letter-spacing:-.02em;
  color:var(--amber);
}
.stat__label{
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--muted);
}

/* 图片容器基础规则（页面阶段放置 <img>） */
.media-frame{
  position:relative;
  overflow:hidden;
  border:1px solid var(--ink-700);
  border-radius:20px;
  aspect-ratio:16/9;
  background:
    radial-gradient(120% 120% at 12% 0%,rgba(39,225,193,.22),transparent 56%),
    radial-gradient(90% 80% at 92% 104%,rgba(242,184,75,.16),transparent 62%),
    var(--ink-800);
}
.media-frame > img{
  position:absolute;
  inset:0;
  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}
.media-frame__caption{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  margin:0;
  padding:16px;
  font-size:.78rem;
  line-height:1.5;
  color:var(--paper);
  background:linear-gradient(180deg,rgba(7,17,31,0) 0%,rgba(7,17,31,.9) 100%);
}

/* 滚动显现 */
.js [data-reveal]{
  opacity:0;
  transform:translate3d(0,16px,0);
  transition:opacity 420ms var(--ease),transform 420ms var(--ease);
}
.js [data-reveal].is-in{
  opacity:1;
  transform:none;
}

/* ---------- 8. 响应式 ---------- */
@media (max-width:1024px){
  .header-pulse{display:none}
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    margin-left:0;
    max-height:0;
    overflow:hidden;
    visibility:hidden;
    background:var(--ink-850);
    border-bottom:1px solid var(--ink-700);
    box-shadow:0 20px 40px rgba(0,0,0,.45);
    transition:max-height 220ms var(--ease),visibility 220ms linear;
  }
  .site-header[data-open] .site-nav{
    max-height:min(72vh,520px);
    overflow-y:auto;
    visibility:visible;
  }
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:6px 16px 18px;
  }
  .nav-list__link{
    width:100%;
    justify-content:flex-start;
    padding:0 10px;
    min-height:52px;
    border-bottom:1px solid rgba(36,67,95,.7);
    font-size:1rem;
  }
  .nav-list__link[aria-current="page"]{
    border-bottom-color:rgba(36,67,95,.7);
    box-shadow:inset 3px 0 0 var(--cyan);
    color:var(--cyan);
  }
  .footer-top{
    grid-template-columns:1fr;
    gap:32px;
  }
}

@media (max-width:700px){
  .pulse-dock{
    top:auto;
    bottom:0;
    left:0;
    right:0;
    width:100%;
    border-radius:18px 18px 0 0;
    border-left:0;
    border-right:0;
    border-bottom:0;
    padding:18px 18px calc(18px + env(safe-area-inset-bottom,0px));
    transform:translate3d(0,100%,0);
  }
  .pulse-dock[data-open]{transform:none}
}

@media (max-width:620px){
  .brand__secondary{letter-spacing:.2em}
  .dock-toggle{padding:0;width:44px;justify-content:center}
  .dock-toggle__text{display:none}
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-bottom__inner{
    flex-direction:column;
    align-items:flex-start;
    gap:10px;
  }
  .footer-legal{gap:2px 16px}
}

@media (max-width:400px){
  .brand__primary{font-size:.94rem}
  .brand__secondary{display:none}
  .footer-cols{grid-template-columns:1fr}
}

/* 降低动态效果 */
@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;
  }
}