/* =============================
   博万体育 共享样式 Site CSS
   ============================= */

/* ---------- Reset & Variables ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:'Noto Sans SC','Microsoft YaHei',sans-serif;
  background:var(--space);
  color:var(--pearl);
  line-height:1.7;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img,svg,video{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button{font:inherit;border:none;background:none;cursor:pointer;color:inherit}
:focus{outline:none}
:focus-visible{
  outline:2px solid var(--ice);
  outline-offset:3px;
  border-radius:4px;
}
::selection{background:rgba(0,255,135,.25);color:var(--pearl)}

:root{
  --space:#0A1128;
  --trench:#122040;
  --mint:#00FF87;
  --orange:#FF7A00;
  --ice:#00D4FF;
  --pearl:#E6EDF5;
  --slate:#8A9BB5;
  --alert:#FF3B3B;
  --border:#2A3B5A;
  --amber:#FFC300;
  --font-headline:Impact,'Noto Sans SC',sans-serif;
  --font-body:'Noto Sans SC','Microsoft YaHei',sans-serif;
  --font-data:'JetBrains Mono','Courier New',monospace;
  --header-h:66px;
  --max-width:1280px;
  --gutter:clamp(16px,4vw,48px);
  --radius:14px;
  --shadow-md:0 8px 30px rgba(0,0,0,.35);
  --shadow-lg:0 20px 60px rgba(0,0,0,.5);
}

/* ---------- 背景氛围 ---------- */
body::before{
  content:'';
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background:
    radial-gradient(600px circle at 8% 15%,rgba(255,122,0,.07),transparent 60%),
    radial-gradient(800px circle at 82% 0%,rgba(0,212,255,.06),transparent 50%),
    radial-gradient(500px circle at 60% 85%,rgba(0,255,135,.04),transparent 60%);
}
body::after{
  content:'';
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(0,212,255,.028) 1px,transparent 1px),
    linear-gradient(90deg,rgba(0,212,255,.028) 1px,transparent 1px);
  background-size:48px 48px;
  mask-image:radial-gradient(ellipse at center,rgba(0,0,0,.9),transparent 85%);
  -webkit-mask-image:radial-gradient(ellipse at center,rgba(0,0,0,.9),transparent 85%);
}

/* ---------- 基础排版 ---------- */
h1,h2,h3,h4,h5,h6{
  font-family:var(--font-headline);
  line-height:1.15;
  letter-spacing:.01em;
  color:var(--pearl);
}
h1{font-size:clamp(2.6rem,6vw,4.8rem)}
h2{font-size:clamp(2rem,4vw,3.2rem)}
h3{font-size:clamp(1.4rem,2.4vw,2rem)}
h4{font-size:clamp(1.1rem,1.6vw,1.4rem)}
p{max-width:70ch}
strong{color:var(--pearl)}
em{color:var(--ice);font-style:normal}

/* ---------- 主内容与容器 ---------- */
main{
  display:block;
  padding-top:calc(var(--header-h) + 56px);
  padding-bottom:80px;
  position:relative;
}
.container{
  width:min(100% - var(--gutter)*2,var(--max-width));
  margin-inline:auto;
}

/* ---------- 辅助类 ---------- */
.sr-only{
  position:absolute;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;
  clip:rect(0,0,0,0);
  white-space:nowrap;border:0;
}

/* ---------- Skip Link ---------- */
.skip-link{
  position:fixed;
  top:12px;
  left:50%;
  transform:translateX(-50%) translateY(-260%);
  z-index:9999;
  background:var(--orange);
  color:var(--space);
  padding:10px 28px;
  border-radius:8px;
  font-weight:700;
  font-size:14px;
  box-shadow:0 6px 24px rgba(255,122,0,.45);
  transition:transform .25s ease;
  white-space:nowrap;
}
.skip-link:focus{
  transform:translateX(-50%) translateY(0);
  color:var(--space);
}

/* ---------- 滚动进度条 ---------- */
.scroll-progress{
  position:absolute;
  top:-1px;
  left:-1px;
  height:3px;
  width:0%;
  background:linear-gradient(90deg,var(--mint),var(--ice));
  border-radius:18px 0 0 0;
  z-index:2;
  pointer-events:none;
  transition:width .08s linear;
}

/* ---------- 页头 Header ---------- */
.site-header{
  position:fixed;
  top:16px;
  left:50%;
  transform:translateX(-50%);
  z-index:1000;
  width:min(calc(100% - 24px),var(--max-width));
  border:1px solid var(--border);
  border-radius:18px;
  box-shadow:0 16px 50px rgba(0,0,0,.55),0 0 0 1px rgba(255,255,255,.015);
  background:rgba(10,17,40,.94);
}
@supports (backdrop-filter:blur(18px)) or (-webkit-backdrop-filter:blur(18px)){
  .site-header{
    background:rgba(10,17,40,.82);
    -webkit-backdrop-filter:blur(18px);
    backdrop-filter:blur(18px);
  }
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  min-height:var(--header-h);
  padding:10px 12px 10px 20px;
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex-shrink:0;
}
.brand-icon{
  display:flex;
  align-items:center;
  justify-content:center;
  width:44px;
  height:44px;
  background:var(--space);
  border:1px solid var(--border);
  border-radius:12px;
  color:var(--mint);
  box-shadow:0 0 18px rgba(0,255,135,.12),inset 0 0 12px rgba(0,255,135,.03);
}
.brand-icon svg{width:26px;height:26px}
.brand-name{
  font-family:var(--font-headline);
  font-size:22px;
  letter-spacing:.06em;
  line-height:1;
  color:var(--pearl);
  white-space:nowrap;
}

/* 导航 */
.site-nav{
  display:flex;
  align-items:center;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:4px;
}
.nav-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:8px 14px;
  border-radius:12px;
  border:1px solid transparent;
  color:var(--slate);
  font-size:14px;
  font-weight:600;
  line-height:1;
  transition:color .2s,background .2s,border-color .2s,box-shadow .2s;
}
.nav-link:hover{
  color:var(--pearl);
  background:rgba(255,255,255,.04);
}
.nav-link[aria-current="page"]{
  color:var(--pearl);
  border-color:var(--orange);
  box-shadow:0 0 0 1px rgba(255,122,0,.18),0 4px 16px rgba(255,122,0,.08);
  background:rgba(255,122,0,.04);
}
.nav-icon{
  width:18px;
  height:18px;
  flex-shrink:0;
  display:block;
}
.nav-label{
  white-space:nowrap;
}

/* 移动端导航开关 */
.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  border:1px solid var(--border);
  border-radius:12px;
  background:var(--space);
  cursor:pointer;
  flex-shrink:0;
  transition:border-color .2s,box-shadow .2s;
}
.nav-toggle:hover{
  border-color:var(--orange);
  box-shadow:0 0 14px rgba(255,122,0,.15);
}
.toggle-line{
  width:20px;
  height:2px;
  background:var(--pearl);
  border-radius:1px;
  transition:transform .25s,opacity .25s;
}
.nav-toggle[aria-expanded="true"] .toggle-line:nth-child(1){
  transform:translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .toggle-line:nth-child(2){
  opacity:0;
}
.nav-toggle[aria-expanded="true"] .toggle-line:nth-child(3){
  transform:translateY(-7px) rotate(-45deg);
}

/* ---------- 页脚 Footer ---------- */
.site-footer{
  position:relative;
  margin-top:80px;
  padding:56px var(--gutter) 0;
  background:linear-gradient(180deg,var(--space) 0%,#060b1a 100%);
  border-top:1px solid var(--border);
  overflow:hidden;
}
.site-footer::before{
  content:'';
  position:absolute;
  top:0;
  left:0;
  width:100%;
  height:4px;
  background:linear-gradient(90deg,var(--mint),var(--ice) 50%,var(--orange));
  opacity:.5;
  z-index:1;
}
.site-footer::after{
  content:'博';
  position:absolute;
  right:20px;
  bottom:-30px;
  font-size:260px;
  font-weight:900;
  font-family:var(--font-headline);
  color:rgba(0,255,135,.025);
  pointer-events:none;
  line-height:1;
  z-index:0;
}
.footer-top{
  max-width:var(--max-width);
  margin:0 auto;
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1.5fr;
  gap:40px;
  padding-bottom:44px;
  position:relative;
  z-index:1;
}
.footer-brand-mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:38px;
  height:38px;
  background:var(--space);
  border:1px solid var(--border);
  border-radius:9px;
  color:var(--mint);
  font-family:var(--font-headline);
  font-size:20px;
  font-weight:700;
  margin-bottom:12px;
  box-shadow:0 0 16px rgba(0,255,135,.08);
}
.footer-brand-name{
  font-family:var(--font-headline);
  font-size:26px;
  letter-spacing:.05em;
  color:var(--pearl);
  margin-bottom:8px;
}
.footer-desc{
  color:var(--slate);
  font-size:14px;
  line-height:1.7;
  max-width:36ch;
}
.footer-nav-title{
  font-family:var(--font-data);
  font-size:13px;
  font-weight:700;
  color:var(--amber);
  letter-spacing:.12em;
  text-transform:uppercase;
  margin-bottom:16px;
}
.footer-list li + li{
  margin-top:8px;
}
.footer-link{
  color:var(--slate);
  font-size:14px;
  transition:color .2s;
}
.footer-link:hover{
  color:var(--mint);
}
.footer-contact-item{
  color:var(--slate);
  font-size:14px;
  line-height:1.6;
}
.footer-note{
  margin-top:12px;
  color:var(--slate);
  font-size:13px;
  line-height:1.5;
  max-width:30ch;
  border-left:2px solid var(--orange);
  padding-left:10px;
}
.footer-bottom{
  max-width:var(--max-width);
  margin:0 auto;
  padding:20px 0;
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:12px;
  border-top:1px solid var(--border);
  font-size:13px;
  color:var(--slate);
  position:relative;
  z-index:1;
}
.footer-copy,.footer-icp{
  font-family:var(--font-data);
  font-size:12px;
  letter-spacing:.04em;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:13px 30px;
  border-radius:9px;
  font-weight:700;
  font-size:15px;
  line-height:1.2;
  border:2px solid transparent;
  transition:all .25s ease;
  cursor:pointer;
  text-align:center;
}
.btn-primary{
  background:var(--orange);
  color:var(--space);
  border-color:var(--orange);
  box-shadow:0 6px 28px rgba(255,122,0,.28);
}
.btn-primary:hover{
  background:transparent;
  color:var(--orange);
  box-shadow:0 6px 20px rgba(255,122,0,.12);
}
.btn-secondary{
  background:transparent;
  color:var(--mint);
  border-color:var(--mint);
  box-shadow:0 0 14px rgba(0,255,135,.06);
}
.btn-secondary:hover{
  background:var(--mint);
  color:var(--space);
  box-shadow:0 6px 24px rgba(0,255,135,.25);
}
.btn:focus-visible{
  outline:2px solid var(--ice);
  outline-offset:3px;
}

/* ---------- 章节标识 ---------- */
.section-label{
  display:inline-flex;
  align-items:center;
  gap:12px;
  font-family:var(--font-data);
  font-size:13px;
  font-weight:700;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--amber);
}
.section-label::before{
  content:'';
  width:28px;
  height:2px;
  background:var(--amber);
  flex-shrink:0;
}
.section-title{
  margin-top:8px;
  font-family:var(--font-headline);
  font-size:clamp(1.8rem,3.2vw,2.8rem);
  line-height:1.12;
  color:var(--pearl);
}

/* ---------- 数据卡片 ---------- */
.data-card{
  position:relative;
  background:linear-gradient(145deg,var(--trench),rgba(10,17,40,.92));
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:26px;
  box-shadow:var(--shadow-md);
  overflow:hidden;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.data-card::after{
  content:'';
  position:absolute;
  top:0;
  left:0;
  width:100%;
  height:2px;
  background:linear-gradient(90deg,var(--mint),transparent 70%);
  opacity:.55;
}
.data-card[data-accent="orange"]::after{
  background:linear-gradient(90deg,var(--orange),transparent 70%);
}
.data-card[data-accent="ice"]::after{
  background:linear-gradient(90deg,var(--ice),transparent 70%);
}
.data-card:hover{
  transform:translateY(-3px);
  box-shadow:0 16px 44px rgba(0,0,0,.5);
  border-color:#38507a;
}
.data-value{
  font-family:var(--font-data);
  font-size:clamp(1.8rem,3vw,2.8rem);
  color:var(--mint);
  line-height:1.1;
}
.data-card[data-accent="orange"] .data-value{color:var(--orange)}
.data-card[data-accent="ice"] .data-value{color:var(--ice)}
.data-label{
  display:block;
  margin-top:6px;
  color:var(--slate);
  font-family:var(--font-data);
  font-size:12px;
  letter-spacing:.08em;
  text-transform:uppercase;
}

/* ---------- 标签 ---------- */
.tag{
  display:inline-block;
  padding:4px 14px;
  border-radius:999px;
  font-family:var(--font-data);
  font-size:12px;
  font-weight:700;
  letter-spacing:.04em;
  background:rgba(255,195,0,.1);
  color:var(--amber);
  border:1px solid rgba(255,195,0,.3);
}
.tag[data-tone="green"]{
  background:rgba(0,255,135,.08);
  color:var(--mint);
  border-color:rgba(0,255,135,.28);
}
.tag[data-tone="orange"]{
  background:rgba(255,122,0,.08);
  color:var(--orange);
  border-color:rgba(255,122,0,.28);
}
.tag[data-tone="ice"]{
  background:rgba(0,212,255,.08);
  color:var(--ice);
  border-color:rgba(0,212,255,.28);
}

/* ---------- 网格 ---------- */
.grid{
  display:grid;
  gap:24px;
}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}

/* ---------- 图片容器 ---------- */
.image-frame{
  position:relative;
  overflow:hidden;
  border-radius:var(--radius);
  border:1px solid var(--border);
  background:linear-gradient(135deg,var(--trench),var(--space) 70%);
  box-shadow:var(--shadow-md);
}
.image-frame::before{
  content:'';
  display:block;
  padding-top:56.25%;
}
.image-frame img,
.image-frame svg{
  position:absolute;
  top:0;left:0;
  width:100%;
  height:100%;
  object-fit:cover;
}
.image-frame[data-ratio="4:3"]::before{padding-top:75%}
.image-frame[data-ratio="1:1"]::before{padding-top:100%}
.image-frame[data-ratio="3:2"]::before{padding-top:66.67%}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  padding:12px 0;
  margin-bottom:28px;
  font-size:14px;
  color:var(--slate);
  border-bottom:1px solid var(--border);
}
.breadcrumb-link{
  color:var(--ice);
  font-weight:600;
  transition:color .2s;
}
.breadcrumb-link:hover{
  color:var(--mint);
}
.breadcrumb-sep{
  color:var(--border);
  font-family:var(--font-data);
  font-size:13px;
}

/* ---------- 分割线 ---------- */
.divider{
  border:none;
  border-top:1px solid var(--border);
  margin:32px 0;
}
.divider[data-accent]{
  height:3px;
  background:linear-gradient(90deg,var(--orange),var(--mint),var(--ice));
  border:none;
  transform:skewX(-15deg);
  width:180px;
  border-radius:3px;
}

/* ---------- 响应式 ---------- */
@media (max-width:1100px){
  .footer-top{
    grid-template-columns:1.4fr 1fr 1fr;
  }
  .footer-contact{
    grid-column:span 2;
  }
}
@media (max-width:920px){
  .nav-toggle{
    display:flex;
  }
  .site-nav{
    position:absolute;
    top:calc(100% + 10px);
    right:0;
    width:min(320px,calc(100vw - 28px));
    background:var(--trench);
    border:1px solid var(--border);
    border-radius:14px;
    box-shadow:0 18px 44px rgba(0,0,0,.6);
    padding:0;
    max-height:0;
    overflow:hidden;
    opacity:0;
    visibility:hidden;
    transform:translateY(-8px);
    transition:max-height .3s ease,opacity .25s ease,transform .25s ease,padding .25s ease;
  }
  .site-nav[data-open]{
    padding:10px;
    max-height:500px;
    opacity:1;
    visibility:visible;
    transform:translateY(0);
  }
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:2px;
  }
  .nav-link{
    padding:13px 16px;
    font-size:15px;
    gap:10px;
    border-radius:10px;
  }
  .footer-top{
    grid-template-columns:1fr 1fr;
    gap:36px 28px;
  }
  .grid-3,.grid-4{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
}
@media (max-width:560px){
  .container{
    width:calc(100% - var(--gutter)*2);
  }
  .header-inner{
    padding-left:14px;
  }
  .brand-name{
    font-size:19px;
  }
  .brand-icon{
    width:40px;
    height:40px;
  }
  .footer-top{
    grid-template-columns:1fr;
    gap:30px;
  }
  .footer-contact{
    grid-column:auto;
  }
  .grid-2,.grid-3,.grid-4{
    grid-template-columns:1fr;
  }
  .footer-bottom{
    flex-direction:column;
    align-items:center;
    text-align:center;
  }
}

/* ---------- 动效适配 ---------- */
@media (prefers-reduced-motion:reduce){
  *{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
  .skip-link{
    transition:none;
  }
  .site-nav{
    transition:none;
  }
  .scroll-progress{
    display:none;
  }
  .data-card:hover{
    transform:none;
  }
}