/* ============================================================
   bob体官网主站 — /assets/site.css
   共享层：reset / 变量 / 中文排版 / 头部 / 页脚 / 基础组件
   ============================================================ */

:root{
  --ink:#07150F;
  --ink-deep:#050F0B;
  --panel:#11171A;
  --panel-soft:#0A1713;
  --line:#1E3A33;
  --text:#E4EDEA;
  --muted:#93AFA7;
  --cyan:#35F2CE;
  --amber:#FFB02E;
  --indigo:#4F8BFF;
  --coral:#FF6F52;
  --violet:#B58CFF;
  --lime:#A8E05F;
  --paper:#F2F6F4;

  --wrap:1240px;
  --gutter:clamp(16px,4vw,48px);
  --radius-s:8px;
  --radius-m:14px;
  --radius-l:26px;

  --font-display:"Archivo Narrow","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:240ms;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body,h1,h2,h3,h4,h5,p,ul,ol,dl,dd,figure,blockquote,fieldset{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
a{color:inherit;text-decoration:none}
:focus{outline:none}
table{border-collapse:collapse}

/* ---------- base ---------- */
html{scroll-behavior:smooth}
body{
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    linear-gradient(to right,rgba(30,58,51,.55) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(30,58,51,.55) 1px,transparent 1px);
  background-size:88px 88px;
  background-position:center top;
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:900;letter-spacing:-.02em;line-height:1.04}
h1{font-size:clamp(34px,6.4vw,72px);line-height:.96}
h2{font-size:clamp(24px,3.4vw,34px)}
h3{font-size:clamp(18px,2.2vw,24px)}
h4{font-size:18px}
p{max-width:62ch}
a:hover{color:var(--cyan)}
::selection{background:var(--cyan);color:var(--ink)}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:4px}
#main-content{display:block;scroll-margin-top:150px}

/* ---------- layout ---------- */
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.lane{border-top:1px solid var(--line);padding-block:clamp(26px,4vw,52px)}
.section{padding-block:clamp(26px,4vw,52px)}
.section-head{
  display:flex;align-items:baseline;justify-content:space-between;
  gap:clamp(12px,3vw,32px);flex-wrap:wrap;margin-bottom:clamp(18px,2.6vw,30px);
}
.section-title{font-size:clamp(24px,3.4vw,34px)}
.section-note{font-size:13px;color:var(--muted);max-width:34ch;letter-spacing:.04em}
.divider{height:1px;background:var(--line);border:0;margin:0}

.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  column-gap:clamp(16px,2.2vw,32px);
  row-gap:clamp(20px,3vw,40px);
}
.col-main{grid-column:1 / span 7}
.col-wide{grid-column:1 / span 9}
.col-aside{grid-column:9 / span 4}
.col-side-left{grid-column:1 / span 4}
.col-full{grid-column:1 / -1}

/* ---------- typography helpers ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11px;font-weight:700;
  letter-spacing:.18em;text-transform:uppercase;color:var(--muted);
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--amber);border-radius:2px}
.num{
  font-family:var(--font-mono);font-weight:700;
  font-variant-numeric:tabular-nums;letter-spacing:-.02em;
}
.prose p{max-width:38ch;margin-bottom:1em;line-height:1.75}
.prose p:last-child{margin-bottom:0}
.prose h3{margin:1.4em 0 .5em}

.page-head{padding-block:clamp(26px,4.4vw,58px);border-bottom:1px solid var(--line)}
.page-title{font-family:var(--font-display);font-weight:900;font-size:clamp(34px,6vw,72px);line-height:.94;letter-spacing:-.02em}
.page-lede{margin-top:clamp(14px,2vw,22px);max-width:40ch;color:var(--muted);font-size:15px}

.breadcrumbs{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--muted);margin-bottom:18px}
.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.breadcrumbs li+li::before{content:"/";margin-right:8px;color:rgba(147,175,167,.5)}
.breadcrumbs a:hover{color:var(--cyan)}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:999px;
  font-family:var(--font-body);font-size:11px;font-weight:700;
  letter-spacing:.14em;text-transform:uppercase;
  background:rgba(228,237,234,.08);color:var(--text);
  border:1px solid transparent;white-space:nowrap;
}
.tag--indigo{background:rgba(79,139,255,.16);color:#A6C2FF;border-color:rgba(79,139,255,.42)}
.tag--coral{background:rgba(255,111,82,.16);color:#FFAF9C;border-color:rgba(255,111,82,.42)}
.tag--violet{background:rgba(181,140,255,.16);color:#D3BEFF;border-color:rgba(181,140,255,.42)}
.tag--lime{background:rgba(168,224,95,.16);color:#CDEF9E;border-color:rgba(168,224,95,.42)}
.tag--cyan{background:rgba(53,242,206,.16);color:#8CF9E2;border-color:rgba(53,242,206,.42)}
.tag--amber{background:rgba(255,176,46,.16);color:#FFD08A;border-color:rgba(255,176,46,.42)}

.panel{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius-m);
  padding:clamp(16px,2.4vw,26px);
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:999px;border:1px solid transparent;
  font-family:var(--font-body);font-size:14px;font-weight:700;letter-spacing:.03em;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn--primary{background:var(--cyan);color:var(--ink)}
.btn--primary:hover{background:#6DF7DE;color:var(--ink);transform:translateY(-1px)}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--text)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-1px)}

/* ---------- media frame（页面阶段放图片占位） ---------- */
.media-frame{
  position:relative;overflow:hidden;
  border-radius:var(--radius-l);
  background:var(--panel-soft);
  border:1px solid var(--line);
  isolation:isolate;
}
.media-frame__img{display:block;width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--square{aspect-ratio:1/1}
.media-frame--strip{aspect-ratio:21/9}
.media-frame::after{
  content:"";position:absolute;inset:auto 0 0 0;height:52%;
  background:linear-gradient(to top,rgba(7,21,15,.82),transparent);
  pointer-events:none;z-index:1;
}
.media-frame--grid::before{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(53,242,206,.16) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(53,242,206,.16) 1px,transparent 1px);
  background-size:44px 44px;
}
.media-frame__tag{
  position:absolute;left:14px;bottom:14px;z-index:2;
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  background:rgba(7,21,15,.78);border:1px solid var(--line);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--cyan);
}
.media-frame__caption{
  position:absolute;left:14px;right:14px;bottom:14px;z-index:2;
  font-size:13px;color:var(--text);line-height:1.5;max-width:30ch;
}

/* ---------- reveal ---------- */
.reveal{transition:opacity .36s var(--ease),transform .42s var(--ease)}
.js-reveal .reveal{opacity:0;transform:translateY(16px)}
.js-reveal .reveal.is-visible{opacity:1;transform:none;transition-delay:calc(var(--i,0) * 70ms)}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;left:14px;top:-120px;z-index:120;
  padding:12px 18px;border-radius:0 0 12px 12px;
  background:var(--cyan);color:var(--ink);
  font-size:13px;font-weight:700;letter-spacing:.06em;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:0;color:var(--ink)}

/* ============================================================
   HEADER
   ============================================================ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(7,21,15,.94);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.header-bar{position:relative;border-bottom:0}
.header-bar__inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:clamp(12px,2vw,32px);min-height:76px;
}

/* brand */
.brand{display:inline-flex;align-items:center;gap:12px;min-width:0}
.brand__mark{
  position:relative;flex:0 0 auto;
  width:42px;height:42px;display:grid;place-items:center;
  background:var(--panel);border:1px solid var(--line);
  border-radius:14px 14px 14px 4px;overflow:hidden;
}
.brand__mark::after{
  content:"";position:absolute;right:-7px;bottom:-7px;
  width:18px;height:18px;border-radius:50%;background:var(--cyan);opacity:.85;
}
.brand__mark-core{
  position:relative;z-index:1;
  font-family:var(--font-mono);font-weight:700;font-size:17px;
  line-height:1;color:var(--text);
}
.brand__text{display:flex;flex-direction:column;gap:2px;min-width:0}
.brand__name{
  font-family:var(--font-display);font-weight:900;font-size:18px;
  letter-spacing:.01em;color:var(--text);line-height:1.1;
}
.brand__sub{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--muted);white-space:nowrap;
}

/* nav toggle */
.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:9px 14px;border:1px solid var(--line);border-radius:999px;
  background:var(--panel);color:var(--text);
  font-size:12px;font-weight:700;letter-spacing:.14em;
}
.nav-toggle__bars{display:grid;gap:4px;width:18px}
.nav-toggle__bar{display:block;height:2px;border-radius:2px;background:var(--cyan);transition:transform .22s var(--ease),opacity .18s var(--ease)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.nav-toggle__text{line-height:1}

/* primary nav */
.primary-nav__list{display:flex;align-items:center;gap:clamp(10px,1.8vw,26px)}
.primary-nav__link{
  position:relative;display:inline-block;padding:6px 2px;
  font-size:14px;font-weight:500;letter-spacing:.02em;color:var(--muted);
  transition:color var(--dur) var(--ease);
}
.primary-nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:var(--cyan);transform:scaleX(0);transform-origin:left;
  transition:transform var(--dur) var(--ease);
}
.primary-nav__link:hover{color:var(--text)}
.primary-nav__link:hover::after{transform:scaleX(1)}
.primary-nav__link[aria-current="page"]{color:var(--text);font-weight:700}
.primary-nav__link[aria-current="page"]::after{transform:scaleX(1);background:var(--amber)}

/* scorebar */
.scorebar{background:var(--panel-soft);border-top:1px solid var(--line)}
.scorebar__inner{
  display:flex;align-items:center;gap:clamp(12px,2vw,28px);
  min-height:56px;
}
.scorebar__round{display:flex;align-items:baseline;gap:8px;flex:0 0 auto}
.scorebar__round-label{
  font-family:var(--font-mono);font-size:11px;font-weight:700;
  letter-spacing:.14em;text-transform:uppercase;color:var(--muted);
}
.scorebar__round-value{
  font-family:var(--font-mono);font-weight:700;font-size:22px;line-height:1;
  color:var(--amber);letter-spacing:-.02em;
}
.scorebar__round-value.is-tick{animation:tick .28s var(--ease)}
@keyframes tick{0%{opacity:.3;transform:translateY(-2px)}100%{opacity:1;transform:none}}
.scorebar__round-suffix{font-size:11px;letter-spacing:.14em;color:var(--muted)}

.scorebar__leagues{
  display:flex;align-items:center;gap:6px;
  flex:1 1 auto;min-width:0;
  overflow-x:auto;padding-block:6px;
  scrollbar-width:thin;scrollbar-color:var(--line) transparent;
}
.scorebar__leagues::-webkit-scrollbar{height:4px}
.scorebar__leagues::-webkit-scrollbar-thumb{background:var(--line);border-radius:4px}
.league-chip{
  --chip:var(--cyan);
  display:inline-flex;align-items:center;gap:7px;
  padding:6px 12px;border-radius:999px;
  border:1px solid var(--line);background:transparent;
  font-size:12px;font-weight:700;letter-spacing:.06em;color:var(--muted);
  white-space:nowrap;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),
             background-color var(--dur) var(--ease);
}
.league-chip__dot{
  width:8px;height:8px;border-radius:50%;background:var(--chip);
  box-shadow:0 0 0 3px rgba(228,237,234,.06);
  transition:background-color var(--dur) var(--ease);
}
.league-chip:hover{color:var(--text);border-color:var(--chip)}
.league-chip.is-active{background:var(--chip);border-color:var(--chip);color:var(--ink)}
.league-chip.is-active .league-chip__dot{background:var(--ink);box-shadow:none}
.league-chip--indigo{--chip:var(--indigo)}
.league-chip--coral{--chip:var(--coral)}
.league-chip--violet{--chip:var(--violet)}
.league-chip--lime{--chip:var(--lime)}
.league-chip--cyan{--chip:var(--cyan)}
.league-chip--amber{--chip:var(--amber)}

.scorebar__meta{display:flex;align-items:center;gap:14px;flex:0 0 auto}
.scorebar__time{
  display:inline-flex;align-items:baseline;gap:6px;
  font-family:var(--font-mono);font-size:12px;color:var(--muted);letter-spacing:.04em;
}
.scorebar__time-label{font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:rgba(147,175,167,.8)}
.scorebar__panel{
  display:inline-flex;align-items:center;
  padding:6px 13px;border-radius:999px;
  border:1px solid rgba(53,242,206,.45);
  font-size:12px;font-weight:700;letter-spacing:.06em;color:var(--cyan);
  white-space:nowrap;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.scorebar__panel:hover{background:var(--cyan);color:var(--ink)}

/* scroll progress */
.scroll-progress{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:rgba(53,242,206,.12);pointer-events:none;overflow:hidden;
}
.scroll-progress__bar{
  display:block;height:100%;width:100%;
  background:var(--cyan);
  transform:scaleX(0);transform-origin:0 50%;
  transition:transform .12s linear;
  box-shadow:0 0 10px rgba(53,242,206,.7);
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer{
  margin-top:clamp(28px,5vw,64px);
  background:var(--ink-deep);
  border-top:1px solid var(--line);
  padding-top:clamp(30px,4.6vw,60px);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr .9fr .9fr .9fr 1.3fr;
  gap:clamp(20px,2.6vw,40px);
}
.footer-col{min-width:0}
.footer-brand{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-display);font-weight:900;font-size:20px;
  letter-spacing:-.01em;color:var(--text);
}
.footer-brand:hover{color:var(--cyan)}
.footer-mark{
  display:grid;place-items:center;width:32px;height:32px;
  border-radius:11px 11px 11px 3px;
  background:var(--panel);border:1px solid var(--line);
  font-family:var(--font-mono);font-size:13px;font-weight:700;color:var(--cyan);
}
.footer-note{
  margin-top:14px;max-width:34ch;
  font-size:13px;line-height:1.8;color:var(--muted);
}
.footer-title{
  font-family:var(--font-body);font-weight:700;
  font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--text);margin-bottom:14px;
  padding-bottom:10px;border-bottom:1px solid var(--line);
}
.footer-leagues{display:flex;flex-direction:column;gap:8px}
.footer-league{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.04em;color:var(--muted);
}
.footer-league__dot{width:8px;height:8px;border-radius:2px;flex:0 0 auto;background:var(--cyan)}
.footer-league__dot--indigo{background:var(--indigo)}
.footer-league__dot--coral{background:var(--coral)}
.footer-league__dot--violet{background:var(--violet)}
.footer-league__dot--lime{background:var(--lime)}
.footer-league__dot--cyan{background:var(--cyan)}
.footer-league__dot--amber{background:var(--amber)}
.footer-list{display:flex;flex-direction:column;gap:8px}
.footer-list a{
  display:inline-block;font-size:13px;letter-spacing:.04em;color:var(--muted);
  transition:color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.footer-list a:hover{color:var(--cyan);transform:translateX(2px)}
.footer-contact{display:flex;flex-direction:column;gap:10px}
.footer-contact li{display:flex;gap:10px;align-items:baseline;font-size:13px;line-height:1.6}
.footer-contact__key{
  flex:0 0 auto;font-family:var(--font-mono);
  font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:rgba(147,175,167,.85);
}
.footer-contact__val{color:var(--text);word-break:break-word}
.footer-bottom{
  margin-top:clamp(26px,4vw,46px);
  border-top:1px solid var(--line);
  padding-block:18px 26px;
  display:flex;flex-wrap:wrap;gap:10px 28px;
  align-items:center;justify-content:space-between;
}
.footer-meta{
  display:flex;flex-wrap:wrap;gap:8px 18px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;color:var(--muted);
}
.footer-meta__item{white-space:nowrap}
.footer-meta--end{font-family:var(--font-body);font-size:12px;max-width:46ch;color:rgba(147,175,167,.8)}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:1080px){
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;}
  .footer-grid > :nth-child(4){grid-column:1 / span 1}
  .footer-grid > :nth-child(5){grid-column:2 / span 2}
  .col-main{grid-column:1 / -1}
  .col-wide{grid-column:1 / -1}
  .col-side-left{grid-column:1 / -1}
  .col-aside{grid-column:1 / -1}
}

@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  .primary-nav{
    display:none;
    position:absolute;left:0;right:0;top:100%;
    background:var(--panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
    padding:6px var(--gutter) 20px;
    max-height:calc(100vh - 120px);overflow-y:auto;
    box-shadow:0 24px 40px rgba(0,0,0,.45);
  }
  .primary-nav[data-open]{display:block;animation:nav-drop .24s var(--ease)}
  @keyframes nav-drop{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}
  .primary-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .primary-nav__item{border-bottom:1px solid var(--line)}
  .primary-nav__item:last-child{border-bottom:0}
  .primary-nav__link{display:block;padding:15px 2px;font-size:16px}
  .primary-nav__link::after{left:0;right:auto;width:24px;bottom:8px}
  .brand__sub{display:none}
  .scorebar__inner{flex-wrap:wrap;row-gap:8px;padding-block:10px;min-height:0}
  .scorebar__leagues{order:3;flex:1 0 100%;padding-bottom:2px}
  .scorebar__meta{margin-left:auto}
}

@media (max-width:720px){
  body{background-size:56px 56px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px 20px}
  .footer-grid > :nth-child(1){grid-column:1 / -1}
  .footer-grid > :nth-child(4){grid-column:1 / span 1}
  .footer-grid > :nth-child(5){grid-column:2 / span 1}
  .footer-note{max-width:100%}
  .footer-bottom{justify-content:flex-start}
  .page-title{font-size:clamp(30px,9vw,52px)}
}

@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr}
  .footer-grid > :nth-child(4),
  .footer-grid > :nth-child(5){grid-column:1 / -1}
  .scorebar__time-label{display:none}
  .brand__mark{width:38px;height:38px}
  .brand__name{font-size:16px}
}

/* ============================================================
   MOTION FALLBACK
   ============================================================ */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    transition-delay:0ms !important;
  }
  .js-reveal .reveal{opacity:1 !important;transform:none !important}
  .scroll-progress__bar{transition:none}
}