/* ============================================================
   BSPORTS看台 · 全站共享样式  /assets/site.css
   深海夜色底 + 单点荧光青光源 + 夜航蓝分区 + 落日橙/看台红强调
   ============================================================ */

/* ---------- 0. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0}
ul[class],ol[class]{margin:0;padding:0;list-style:none}
img,svg{max-width:100%}
button{font:inherit;color:inherit;background:none;border:0}
a{color:inherit}
[hidden]{display:none !important}

/* ---------- 1. Tokens ---------- */
:root{
  --night:#061826;
  --night-2:#0D2B3F;
  --cyan:#23E0C4;
  --cyan-dim:#0F8F7E;
  --orange:#FF8A3D;
  --red:#E8413C;
  --white:#F5F8FA;
  --slate:#9BB0BE;
  --steel:#3E5C70;
  --ink:#03090E;
  --line:rgba(62,92,112,.55);
  --line-soft:rgba(62,92,112,.32);
  --glass:rgba(13,43,63,.55);
  --glass-deep:rgba(6,24,38,.78);
  --text:rgba(245,248,250,.88);
  --font-title:"Noto Sans SC SemiCondensed","Source Han Sans SC","PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC",system-ui,-apple-system,"Microsoft YaHei",sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --maxw:1280px;
  --header-h:104px;
  --r-sm:3px;
  --r-md:6px;
  --r-pill:999px;
  --shadow:0 24px 60px -32px rgba(0,0,0,.9);
  --ease:220ms cubic-bezier(.32,.72,.24,1);
  color-scheme:dark;
}

/* ---------- 2. 中文排版与页面基底 ---------- */
body{
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  color:var(--text);
  background-color:var(--night);
  background-image:
    radial-gradient(1100px 520px at 82% -8%, rgba(35,224,196,.10), transparent 62%),
    radial-gradient(760px 420px at 2% 14%, rgba(255,138,61,.06), transparent 60%);
  background-repeat:no-repeat;
  padding-top:var(--header-h);
  min-height:100vh;
  overflow-x:hidden;
}
h1,h2,h3,h4{font-family:var(--font-title);font-weight:800;letter-spacing:-.02em;line-height:1.18;color:var(--white)}
h1{font-size:clamp(30px,4.6vw,54px)}
h2{font-size:clamp(24px,3.2vw,38px)}
h3{font-size:clamp(18px,2.1vw,24px);font-weight:700}
h4{font-size:16px;font-weight:700}
::selection{background:var(--cyan);color:var(--ink)}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:2px}
.mono{font-family:var(--font-mono);font-weight:500;letter-spacing:.02em;font-feature-settings:"tnum" 1}

/* ---------- 3. 容器与骨架 ---------- */
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding-left:clamp(16px,4vw,40px);padding-right:clamp(16px,4vw,40px)}
.section{position:relative;padding:clamp(48px,7vw,104px) 0}
.section--band{background:var(--night-2);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)}
.section--light{background:var(--white);color:var(--night-2)}
.section--light h1,.section--light h2,.section--light h3,.section--light .section__title{color:var(--night)}
.section--light .section__aside{color:#41627a}
.section__head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:clamp(14px,2vw,32px);margin-bottom:clamp(20px,3vw,38px)}
.section__title{font-family:var(--font-title);font-size:clamp(24px,3.4vw,40px);font-weight:800;letter-spacing:-.02em;line-height:1.14;max-width:28ch}
.section__aside{max-width:40ch;font-size:13.5px;line-height:1.8;color:var(--slate)}
.kicker{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-title);font-size:12px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--cyan);margin-bottom:14px}
.kicker::before{content:"";width:24px;height:2px;background:var(--cyan);display:block}
.rule{height:1px;border:0;background:var(--line-soft);margin:0}
.bleed-top{margin-top:calc(var(--header-h) * -1)}

/* 偏置网格 + 左侧窄边导航 */
.rail-layout{display:grid;grid-template-columns:minmax(72px,96px) minmax(0,1fr);gap:clamp(20px,3vw,48px);align-items:start}
.rail-nav{position:sticky;top:calc(var(--header-h) + 24px);display:grid;gap:10px;align-self:start;padding-right:8px;border-right:1px solid var(--line-soft)}
.rail-nav__link{display:block;font-family:var(--font-title);font-size:12.5px;font-weight:600;letter-spacing:.04em;color:var(--slate);text-decoration:none;padding:6px 0;transition:color var(--ease)}
.rail-nav__link:hover{color:var(--white)}
.rail-nav__current{color:var(--cyan);border-left:2px solid var(--cyan);padding-left:10px}
.rail-nav__current:hover{color:var(--cyan)}

/* ---------- 4. 网格 ---------- */
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--stagger>*:nth-child(even){margin-top:clamp(18px,3.4vw,44px)}

/* ---------- 5. 卡片与玻璃层 ---------- */
.panel{position:relative;background:var(--night-2);border:1px solid var(--line);border-radius:var(--r-md);padding:clamp(18px,2.4vw,30px)}
.panel--glass{background:var(--glass);border-color:var(--line);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
.panel--solid{background:var(--night)}
.panel--light{background:var(--white);color:var(--night-2);border-color:transparent}
.panel--light .panel__title{color:var(--night)}

/* ---------- 6. 图片容器（响应式，无需远程资源） ---------- */
.media{
  position:relative;display:block;overflow:hidden;border-radius:var(--r-md);
  border:1px solid var(--line);aspect-ratio:16/9;background-color:var(--night-2);
  background-image:
    radial-gradient(120% 90% at 78% 8%, rgba(35,224,196,.22), rgba(35,224,196,0) 58%),
    linear-gradient(150deg, rgba(13,43,63,.25) 0%, rgba(3,9,14,.94) 100%),
    repeating-linear-gradient(118deg, rgba(62,92,112,.35) 0 1px, rgba(62,92,112,0) 1px 14px);
}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:3/4}
.media--square{aspect-ratio:1/1}
.media__img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:saturate(.86) contrast(1.06)}
.media__placeholder{display:flex;align-items:center;justify-content:center;height:100%;padding:20px;text-align:center;font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:rgba(155,176,190,.75)}
.media__badge{position:absolute;top:12px;left:12px;z-index:2}
.media__caption{position:absolute;left:0;right:0;bottom:0;z-index:2;padding:28px 14px 12px;font-size:12.5px;line-height:1.6;color:var(--white);background:linear-gradient(180deg, rgba(3,9,14,0), rgba(3,9,14,.9))}

/* ---------- 7. 标签、数据与进度 ---------- */
.tag{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border:1px solid var(--line);border-radius:var(--r-pill);background:var(--glass-deep);font-size:12px;font-weight:500;letter-spacing:.03em;color:var(--slate);white-space:nowrap}
.tag--cyan{border-color:rgba(35,224,196,.5);background:rgba(35,224,196,.12);color:var(--cyan)}
.tag--orange{border-color:rgba(255,138,61,.5);background:rgba(255,138,61,.12);color:var(--orange)}
.tag--red{border-color:rgba(232,65,60,.55);background:rgba(232,65,60,.14);color:#FF9E9A}
.stat-row{display:flex;flex-wrap:wrap;gap:clamp(18px,3vw,44px)}
.stat{display:grid;gap:6px;min-width:96px}
.stat__value{font-family:var(--font-mono);font-size:clamp(24px,3.4vw,38px);font-weight:600;line-height:1;color:var(--cyan);letter-spacing:-.01em}
.stat__label{font-size:12.5px;letter-spacing:.04em;color:var(--slate)}
.meter{position:relative;height:6px;border-radius:var(--r-pill);background:rgba(62,92,112,.45);overflow:hidden}
.meter__fill{display:block;height:100%;width:var(--value,50%);border-radius:var(--r-pill);background:linear-gradient(90deg,var(--cyan),var(--cyan-dim))}

/* ---------- 8. 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 18px;border:1px solid transparent;border-radius:var(--r-sm);font-family:var(--font-title);font-size:14px;font-weight:700;letter-spacing:.02em;text-decoration:none;cursor:pointer;background:var(--night-2);color:var(--white);transition:background-color var(--ease),color var(--ease),border-color var(--ease),transform var(--ease)}
.btn:hover{transform:translateY(-1px)}
.btn--accent{background:var(--cyan);color:var(--ink)}
.btn--accent:hover{background:#1FCBB2}
.btn--orange{background:var(--orange);color:var(--ink)}
.btn--orange:hover{background:#FF9C5C}
.btn--ghost{background:transparent;border-color:var(--steel);color:var(--white)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);background:rgba(35,224,196,.08)}
.btn--sm{padding:8px 13px;font-size:13px}

/* ---------- 9. 面包屑与正文 ---------- */
.breadcrumb{padding-top:20px;font-size:12.5px}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;color:var(--slate)}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb__link{color:var(--slate);text-decoration:none;transition:color var(--ease)}
.breadcrumb__link:hover{color:var(--cyan)}
.breadcrumb__sep{color:var(--steel)}
.breadcrumb__current{color:var(--white)}
.prose{max-width:68ch;font-size:17px;line-height:1.85;color:var(--text)}
.prose h2{margin:1.6em 0 .6em;font-size:clamp(20px,2.4vw,26px)}
.prose h3{margin:1.4em 0 .5em}
.prose p{margin-bottom:1.1em}
.prose ul,.prose ol{margin:0 0 1.1em;padding-left:1.3em}
.prose ul{list-style:disc}
.prose ol{list-style:decimal}
.prose li{margin-bottom:.4em}
.prose a{color:var(--cyan);text-decoration:underline;text-underline-offset:3px}
.prose strong{color:var(--white);font-weight:700}

/* ---------- 10. 筛选组件 ---------- */
.filter-bar{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.filter-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border:1px solid var(--line);border-radius:var(--r-pill);background:var(--glass-deep);font-size:13px;font-weight:600;color:rgba(245,248,250,.8);cursor:pointer;transition:background-color var(--ease),color var(--ease),border-color var(--ease)}
.filter-btn:hover{border-color:var(--cyan);color:var(--cyan)}
.filter-btn[aria-pressed="true"]{background:var(--cyan);border-color:var(--cyan);color:var(--ink)}
.filter-count{font-family:var(--font-mono);font-size:12.5px;color:var(--slate);margin-left:6px}
.empty-state{padding:26px 20px;border:1px dashed var(--line);border-radius:var(--r-md);color:var(--slate);font-size:14px;text-align:center}
.is-hidden{display:none !important}

/* ---------- 11. 显现动画 ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity 320ms ease,transform 320ms ease}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- 12. 头部 ---------- */
.skip-link{position:fixed;top:10px;left:16px;z-index:1200;padding:10px 16px;border-radius:var(--r-sm);background:var(--cyan);color:var(--ink);font-family:var(--font-title);font-size:13px;font-weight:700;text-decoration:none;transform:translateY(-220%);transition:transform var(--ease)}
.skip-link:focus,.skip-link:focus-visible{transform:translateY(0)}

.site-header{
  position:fixed;top:0;left:0;right:0;z-index:900;
  color:var(--white);
  background:linear-gradient(180deg, rgba(3,9,14,.78) 0%, rgba(3,9,14,.28) 68%, rgba(3,9,14,0) 100%);
  border-bottom:1px solid transparent;
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  transition:background-color var(--ease),border-color var(--ease),box-shadow var(--ease)
}
.site-header[data-scrolled]{
  background:var(--night-2);
  border-bottom-color:var(--line);
  box-shadow:0 20px 44px -28px rgba(0,0,0,.95)
}

/* 顶部状态带 */
.pulse-band{background:rgba(6,24,38,.6);border-bottom:1px solid var(--line-soft);transition:background-color var(--ease)}
.site-header[data-scrolled] .pulse-band{background:rgba(3,9,14,.45)}
.pulse-band__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:34px}
.pulse-band__text{display:flex;align-items:center;gap:9px;font-size:12.5px;color:var(--slate);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pulse-band__dot{width:7px;height:7px;flex:0 0 auto;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 4px rgba(35,224,196,.16);animation:pulseDot 2.6s ease-in-out infinite}
@keyframes pulseDot{0%,100%{opacity:1;box-shadow:0 0 0 4px rgba(35,224,196,.16)}50%{opacity:.55;box-shadow:0 0 0 8px rgba(35,224,196,.05)}}
.pulse-band__meta{display:inline-flex;align-items:center;gap:8px;font-size:11.5px;letter-spacing:.06em;color:var(--slate);text-transform:uppercase}
.pulse-band__sep{color:var(--steel)}

/* 主导航条 */
.header-bar__inner{display:flex;align-items:center;gap:clamp(16px,2.2vw,34px);min-height:70px}
.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;color:inherit;flex:0 0 auto}
.brand__mark{display:grid;grid-template-columns:repeat(3,1fr);gap:3px;align-items:end;width:32px;height:32px;padding:6px;border:1px solid var(--steel);border-radius:var(--r-sm);background:linear-gradient(150deg, rgba(35,224,196,.2), rgba(13,43,63,.7))}
.brand__mark i{display:block;border-radius:1px;background:var(--cyan);height:42%}
.brand__mark i:nth-child(2){height:82%;background:var(--white)}
.brand__mark i:nth-child(3){height:60%;background:var(--orange)}
.brand__text{display:block;line-height:1.2}
.brand__name{display:block;font-family:var(--font-title);font-size:17px;font-weight:800;letter-spacing:-.02em;color:var(--white)}
.brand__name-cn{color:var(--cyan);margin-left:2px}
.brand__tagline{display:block;margin-top:3px;font-size:11.5px;letter-spacing:.02em;color:var(--slate)}
.brand--footer .brand__name{font-size:18px}

.primary-nav{min-width:0}
.primary-nav__list{display:flex;align-items:center;gap:clamp(10px,1.6vw,26px);list-style:none}
.primary-nav__item{display:flex}
.primary-nav__link{position:relative;display:inline-flex;align-items:center;padding:10px 2px;font-family:var(--font-title);font-size:14.5px;font-weight:600;color:rgba(245,248,250,.8);text-decoration:none;white-space:nowrap;transition:color var(--ease)}
.primary-nav__link::after{content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;background:var(--cyan);transform:scaleX(0);transform-origin:0 50%;transition:transform var(--ease)}
.primary-nav__link:hover{color:var(--white)}
.primary-nav__link:hover::after{transform:scaleX(1)}
.primary-nav__link[aria-current="page"]{color:var(--cyan)}
.primary-nav__link[aria-current="page"]::after{transform:scaleX(1)}

.header-tools{display:flex;align-items:center;gap:10px;flex:0 0 auto;margin-left:auto}
.issue-chip{display:inline-flex;align-items:baseline;gap:7px;padding:6px 11px;border:1px solid var(--line);border-radius:var(--r-pill);background:rgba(6,24,38,.55);font-size:11.5px;color:var(--slate);white-space:nowrap}
.issue-chip__label{letter-spacing:.14em;text-transform:uppercase}
.issue-chip__value{font-size:13px;color:var(--cyan);font-weight:600}

.nav-toggle{display:none;align-items:center;gap:9px;padding:8px 12px;border:1px solid var(--line);border-radius:var(--r-sm);background:rgba(13,43,63,.7);font-family:var(--font-title);font-size:13px;font-weight:600;color:var(--white);cursor:pointer;transition:border-color var(--ease),color var(--ease)}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle__bars{width:16px;height:11px;background:
  linear-gradient(var(--cyan),var(--cyan)) 0 0/100% 2px no-repeat,
  linear-gradient(var(--white),var(--white)) 0 4.5px/100% 2px no-repeat,
  linear-gradient(var(--white),var(--white)) 0 9px/100% 2px no-repeat}
.nav-toggle__label{letter-spacing:.04em}

.scroll-progress{position:absolute;left:0;right:0;bottom:0;height:2px;transform:scaleX(0);transform-origin:0 50%;background:linear-gradient(90deg,var(--cyan),var(--cyan-dim) 55%,var(--orange));opacity:0;pointer-events:none;transition:opacity var(--ease),transform 90ms linear}

/* ---------- 13. 页脚 ---------- */
.site-footer{position:relative;margin-top:clamp(48px,8vw,110px);background:var(--night-2);border-top:1px solid var(--line);color:var(--white)}
.footer-band{display:block;height:5px;background:linear-gradient(90deg,var(--cyan) 0 16%,var(--orange) 16% 24%,var(--steel) 24% 100%)}
.footer-grid{display:grid;grid-template-columns:1.35fr .95fr .95fr 1.15fr;gap:clamp(24px,3.4vw,48px);padding:clamp(36px,5.6vw,72px) 0 clamp(24px,3.4vw,40px)}
.footer-col{min-width:0}
.footer-col--brand{display:flex;flex-direction:column;align-items:flex-start}
.footer-title{margin-bottom:16px;font-family:var(--font-title);font-size:12px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--cyan)}
.footer-list{display:grid;gap:10px}
.footer-link{display:inline-block;font-size:14px;color:rgba(245,248,250,.78);text-decoration:none;border-bottom:1px solid transparent;transition:color var(--ease),border-color var(--ease)}
.footer-link:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.footer-slogan{margin:16px 0 10px;font-size:14px;color:var(--slate)}
.footer-icp{font-size:12.5px;color:var(--slate)}
.footer-contact{margin-bottom:7px;font-size:13.5px;color:rgba(245,248,250,.8);word-break:break-all}
.footer-contact .mono{color:var(--white)}
.footer-note{margin-top:12px;font-size:12.5px;line-height:1.75;color:var(--slate)}
.footer-bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;padding:18px 0 28px;border-top:1px solid var(--line-soft)}
.footer-copy{font-size:12.5px;color:var(--slate)}
.footer-copy--dim{color:rgba(155,176,190,.6);letter-spacing:.06em}

/* ---------- 14. 响应式 ---------- */
@media (min-width:1080px){
  .primary-nav{flex:1 1 auto;display:flex;justify-content:center}
  .nav-toggle{display:none}
}
@media (max-width:1079px){
  .header-bar__inner{flex-wrap:wrap;align-items:center;row-gap:0;padding-top:8px;padding-bottom:2px;min-height:0;gap:10px}
  .brand{order:1}
  .header-tools{order:2;margin-left:auto}
  .primary-nav{order:3;width:100%;overflow-x:auto;overscroll-behavior-x:contain;scrollbar-width:none;-webkit-overflow-scrolling:touch}
  .primary-nav::-webkit-scrollbar{display:none}
  .primary-nav__list{flex-wrap:nowrap;gap:8px;padding:4px 0 10px}
  .primary-nav__link{padding:7px 13px;border:1px solid var(--line);border-radius:var(--r-pill);background:var(--glass-deep);font-size:13px}
  .primary-nav__link::after{display:none}
  .primary-nav__link[aria-current="page"]{border-color:var(--cyan);background:rgba(35,224,196,.15)}
  .nav-toggle{display:inline-flex}
  .primary-nav[data-open]{overflow:visible}
  .primary-nav[data-open] .primary-nav__list{flex-wrap:wrap}
  .rail-nav{position:static;border-right:0;border-bottom:1px solid var(--line-soft);padding-right:0}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:900px){
  .rail-layout{grid-template-columns:minmax(0,1fr);gap:22px}
  .rail-nav{display:flex;flex-wrap:nowrap;gap:16px;overflow-x:auto;padding:0 0 12px;scrollbar-width:none}
  .rail-nav::-webkit-scrollbar{display:none}
  .rail-nav__link{white-space:nowrap;padding:4px 0}
  .rail-nav__current{border-left:0;border-bottom:2px solid var(--cyan);padding-left:0;padding-bottom:6px}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:720px){
  .brand__tagline{display:none}
  .issue-chip{display:none}
  .pulse-band__meta{display:none}
  .header-bar__inner{padding-top:6px}
  .grid--2,.grid--3,.grid--stagger>*:nth-child(even){grid-template-columns:minmax(0,1fr);margin-top:0}
  .section{padding:clamp(38px,9vw,64px) 0}
  .section__head{align-items:flex-start}
  .prose{font-size:16px}
}
@media (max-width:560px){
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .btn{padding:10px 15px}
}

/* ---------- 15. 动效偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .reveal{opacity:1;transform:none}
  .scroll-progress{transition:none}
}