/* ============================================================
   半岛娱乐赛场 · Site Kit
   夜场转播台 × 战术板 / 深海墨蓝底 · 热力橙 · 荧光青 · 沙金刻度
   ============================================================ */

/* ---------- 1. 设计变量 ---------- */
:root{
  --ink:#071A2B;
  --ink-2:#0D2A3F;
  --ink-3:#123448;
  --orange:#FF6B2C;
  --cyan:#35F2D0;
  --gold:#C9A45C;
  --grey:#7A8A94;
  --moss:#5F7F5A;
  --clay:#B86B4B;
  --cream:#F3EBDD;
  --mist:#9FB4B8;

  --on-accent:#06202A;
  --glass:rgba(13,42,63,.55);
  --glass-strong:rgba(7,26,43,.94);
  --line:rgba(201,164,92,.26);
  --line-soft:rgba(159,180,184,.18);

  --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"JetBrains Mono","IBM Plex Mono",Menlo,Consolas,"Courier New",monospace;

  --radius:4px;
  --radius-sm:2px;
  --w-max:1240px;
  --pad-x:clamp(16px,4vw,40px);
  --ease:cubic-bezier(.2,.7,.3,1);
  --dur:150ms;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:104px;
}
body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;padding:0}

/* ---------- 3. 中文排版与基底 ---------- */
body{
  background:var(--ink);
  color:var(--cream);
  font-family:var(--font-sans);
  font-size:clamp(15px,.35vw + 14px,17px);
  line-height:1.75;
  letter-spacing:.01em;
  min-height:100vh;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

h1,h2,h3,h4,h5,h6{
  font-weight:900;
  line-height:1.14;
  letter-spacing:-.012em;
  color:var(--cream);
  text-wrap:balance;
}
h1{font-size:clamp(34px,4.6vw,64px)}
h2{font-size:clamp(24px,2.6vw,38px)}
h3{font-size:clamp(18px,1.6vw,22px)}
h4{font-size:clamp(16px,1.2vw,18px)}

p{max-width:68ch}
small{font-size:.82em;color:var(--mist)}
strong,b{color:var(--cyan);font-weight:700}
code,kbd,samp{font-family:var(--font-mono);font-size:.9em;color:var(--cyan)}

a{
  color:inherit;
  text-decoration:underline;
  text-decoration-thickness:1px;
  text-underline-offset:3px;
  text-decoration-color:rgba(201,164,92,.5);
  transition:color var(--dur) var(--ease),text-decoration-color var(--dur) var(--ease);
}
a:hover{text-decoration-color:var(--cyan);color:var(--cyan)}

::selection{background:var(--cyan);color:var(--on-accent)}

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

/* ---------- 4. 布局容器与栅格 ---------- */
.arena-container{
  width:100%;
  max-width:var(--w-max);
  margin-inline:auto;
  padding-inline:var(--pad-x);
}

.arena-grid{
  display:grid;
  gap:clamp(16px,2.4vw,28px);
}
.arena-grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.arena-grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.arena-grid--split{grid-template-columns:minmax(0,2fr) minmax(0,3fr)}

/* ---------- 5. 跳过链接 ---------- */
.arena-skip{
  position:absolute;
  top:8px;
  left:8px;
  z-index:200;
  padding:10px 16px;
  background:var(--cyan);
  color:var(--on-accent);
  font-size:14px;
  font-weight:800;
  text-decoration:none;
  border-radius:var(--radius-sm);
  transform:translateY(-180%);
  transition:transform var(--dur) var(--ease);
}
.arena-skip:focus,
.arena-skip:focus-visible{
  transform:translateY(0);
  color:var(--on-accent);
  text-decoration:none;
  outline:2px solid var(--gold);
  outline-offset:2px;
}

/* ---------- 6. 头部：紧凑命令栏 ---------- */
.arena-header{
  position:sticky;
  top:0;
  z-index:90;
  background:var(--glass-strong);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid var(--line);
  color:var(--cream);
}

.arena-header__bar{
  display:flex;
  align-items:center;
  gap:clamp(10px,1.8vw,28px);
  width:100%;
  max-width:var(--w-max);
  margin-inline:auto;
  padding:10px var(--pad-x);
  transition:padding var(--dur) var(--ease);
}
.arena-header[data-scrolled="true"] .arena-header__bar{padding-block:6px}

/* 品牌块 */
.arena-brand{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  min-width:0;
  text-decoration:none;
  color:var(--cream);
}
.arena-brand:hover,
.arena-brand:focus-visible{color:var(--cream);text-decoration:none}

.arena-brand__mark{
  flex:0 0 auto;
  width:10px;
  height:34px;
  border-radius:1px;
  background:linear-gradient(180deg,var(--orange) 0 46%,var(--cyan) 46% 100%);
  box-shadow:0 0 0 1px rgba(201,164,92,.42),0 0 14px -4px rgba(53,242,208,.7);
}

.arena-brand__text{
  display:flex;
  flex-direction:column;
  line-height:1.16;
  min-width:0;
}
.arena-brand__name{
  font-size:19px;
  font-weight:900;
  letter-spacing:.02em;
  white-space:nowrap;
}
.arena-brand__status{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.09em;
  color:var(--mist);
  white-space:nowrap;
  transition:opacity var(--dur) var(--ease);
}
.arena-header[data-scrolled="true"] .arena-brand__status{opacity:.55}

/* 移动菜单按钮 */
.arena-nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  margin-left:auto;
  padding:9px 13px;
  background:rgba(13,42,63,.92);
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  color:var(--cream);
  cursor:pointer;
  transition:border-color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.arena-nav-toggle:hover{border-color:var(--cyan);background:rgba(18,52,72,.95)}
.arena-nav-toggle__bars{
  display:block;
  width:18px;
  height:2px;
  background:var(--cyan);
  box-shadow:0 -6px 0 var(--cyan),0 6px 0 var(--cyan);
  transition:background-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.arena-nav-toggle__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
}
.arena-header[data-open="true"] .arena-nav-toggle{border-color:var(--orange)}
.arena-header[data-open="true"] .arena-nav-toggle__bars{
  background:var(--orange);
  box-shadow:0 -6px 0 var(--orange),0 6px 0 var(--orange);
}

/* 主导航 */
.arena-nav{
  display:flex;
  align-items:center;
  gap:clamp(8px,1.4vw,20px);
  margin-left:auto;
}
.arena-nav__list{
  display:flex;
  align-items:center;
  gap:2px;
}
.arena-nav__item{display:flex}

.arena-nav__link{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:8px 10px;
  border:1px solid transparent;
  border-radius:var(--radius-sm);
  font-size:14px;
  font-weight:600;
  line-height:1.3;
  white-space:nowrap;
  text-decoration:none;
  color:var(--cream);
  transition:background-color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),
             color var(--dur) var(--ease);
}
.arena-nav__link:hover,
.arena-nav__link:focus-visible{
  background:rgba(53,242,208,.10);
  border-color:rgba(53,242,208,.38);
  color:var(--cyan);
  text-decoration:none;
}

.arena-nav__index{
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:500;
  letter-spacing:.04em;
  padding:1px 3px;
  border:1px solid rgba(201,164,92,.45);
  border-radius:1px;
  color:var(--gold);
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}

/* 当前栏目：热力橙实色块 */
.arena-nav__link[aria-current="page"]{
  background:var(--orange);
  border-color:var(--orange);
  color:#08131F;
  box-shadow:0 0 0 1px rgba(255,107,44,.35),0 8px 20px -12px rgba(255,107,44,.95);
}
.arena-nav__link[aria-current="page"]:hover,
.arena-nav__link[aria-current="page"]:focus-visible{
  background:var(--orange);
  border-color:var(--orange);
  color:#08131F;
}
.arena-nav__link[aria-current="page"] .arena-nav__index{
  color:#08131F;
  border-color:rgba(8,19,31,.45);
  background:rgba(8,19,31,.12);
}

.arena-header__cta{flex:0 0 auto}

/* 滚动进度轨 */
.arena-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  overflow:hidden;
  pointer-events:none;
}
.arena-progress__bar{
  display:block;
  width:100%;
  height:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--orange) 0%,var(--cyan) 68%,var(--gold) 100%);
  transition:transform 90ms linear;
}

/* ---------- 7. 通用按钮 ---------- */
.arena-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 16px;
  border:1px solid transparent;
  border-radius:var(--radius-sm);
  font-size:14px;
  font-weight:700;
  line-height:1.25;
  text-decoration:none;
  cursor:pointer;
  transition:background-color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),
             color var(--dur) var(--ease),
             transform var(--dur) var(--ease);
}
.arena-btn:hover,
.arena-btn:focus-visible{text-decoration:none}
.arena-btn:active{transform:translateY(1px)}

.arena-btn--primary{
  background:var(--orange);
  border-color:var(--orange);
  color:#08131F;
}
.arena-btn--primary:hover,
.arena-btn--primary:focus-visible{
  background:var(--cyan);
  border-color:var(--cyan);
  color:var(--on-accent);
}

.arena-btn--ghost{
  background:transparent;
  border-color:var(--line);
  color:var(--cream);
}
.arena-btn--ghost:hover,
.arena-btn--ghost:focus-visible{
  border-color:var(--cyan);
  color:var(--cyan);
  background:rgba(53,242,208,.08);
}

/* ---------- 8. 面包屑 / 索引标签 ---------- */
.arena-breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:6px;
  padding-block:14px 0;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--mist);
}
.arena-breadcrumb__item{
  color:var(--mist);
  text-decoration:none;
  transition:color var(--dur) var(--ease);
}
.arena-breadcrumb__item:hover,
.arena-breadcrumb__item:focus-visible{color:var(--cyan);text-decoration:none}
.arena-breadcrumb__item[aria-current="page"]{color:var(--cream)}
.arena-breadcrumb__sep{color:var(--gold);opacity:.7}

.arena-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.16em;
  color:var(--gold);
}
.arena-eyebrow::before{
  content:"";
  width:24px;
  height:1px;
  background:var(--gold);
  opacity:.75;
}

/* ---------- 9. 玻璃层与实色内容层 ---------- */
.arena-panel{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:clamp(18px,2.4vw,28px);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
}

.arena-card{
  background:var(--ink-2);
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
  padding:clamp(18px,2.4vw,28px);
  transition:border-color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.arena-card:hover{border-color:rgba(53,242,208,.38)}

/* ---------- 10. 状态标签 ---------- */
.arena-tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  background:rgba(13,42,63,.7);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  line-height:1.5;
  color:var(--mist);
}
.arena-tag--live{
  background:var(--cyan);
  border-color:var(--cyan);
  color:var(--on-accent);
  font-weight:700;
}
.arena-tag--round{
  color:var(--gold);
  border-color:rgba(201,164,92,.55);
}
.arena-tag--moss{
  color:#D8E6D4;
  background:rgba(95,127,90,.55);
  border-color:rgba(95,127,90,.9);
}
.arena-tag--clay{
  color:#F4DED2;
  background:rgba(184,107,75,.45);
  border-color:rgba(184,107,75,.9);
}

/* ---------- 11. 图片容器基础规则 ---------- */
.arena-media{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16 / 9;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:
    radial-gradient(circle at 78% 22%,rgba(53,242,208,.16),transparent 58%),
    linear-gradient(135deg,var(--ink-3) 0%,var(--ink-2) 46%,var(--ink) 100%);
}
.arena-media__img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.arena-media__caption{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  margin:0;
  padding:10px 14px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--cream);
  background:linear-gradient(180deg,rgba(7,26,43,0) 0%,rgba(7,26,43,.92) 100%);
}
.arena-media--wide{aspect-ratio:21 / 9}
.arena-media--square{aspect-ratio:1 / 1}
.arena-media--portrait{aspect-ratio:3 / 4}

/* ---------- 12. 页脚 ---------- */
.arena-footer{
  position:relative;
  margin-top:clamp(48px,7vw,96px);
  background:linear-gradient(180deg,rgba(13,42,63,.55) 0%,rgba(7,26,43,1) 58%);
  border-top:1px solid var(--line);
  color:var(--cream);
}

.arena-footer__scale{
  position:relative;
  height:14px;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.arena-footer__scale::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:6px;
  background-image:repeating-linear-gradient(90deg,rgba(201,164,92,.55) 0 1px,transparent 1px 28px);
}

.arena-footer__grid{
  display:grid;
  grid-template-columns:1.5fr .8fr .8fr 1.4fr;
  gap:clamp(24px,4vw,56px);
  padding-block:clamp(32px,5vw,56px);
}

.arena-footer__brand{min-width:0}
.arena-footer__wordmark{
  margin:0 0 8px;
  font-size:clamp(20px,2.2vw,26px);
  font-weight:900;
  letter-spacing:.02em;
  color:var(--cream);
}
.arena-footer__coords{
  margin:0 0 12px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--gold);
}
.arena-footer__summary{
  margin:0;
  max-width:34ch;
  font-size:14px;
  line-height:1.7;
  color:var(--mist);
}

.arena-footer__col{min-width:0}
.arena-footer__heading{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.16em;
  color:var(--gold);
}

.arena-footer__links{
  display:flex;
  flex-direction:column;
  gap:8px;
}
.arena-footer__link{
  display:inline-block;
  padding:2px 0;
  font-size:14px;
  color:var(--cream);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.arena-footer__link:hover,
.arena-footer__link:focus-visible{
  color:var(--cyan);
  border-bottom-color:rgba(53,242,208,.55);
  text-decoration:none;
}

.arena-footer__contact{
  display:flex;
  flex-direction:column;
  gap:10px;
  margin-bottom:14px;
}
.arena-footer__contact-row{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:10px;
  align-items:baseline;
}
.arena-footer__contact-key{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--grey);
}
.arena-footer__contact-val{
  font-size:14px;
  color:var(--cream);
  overflow-wrap:anywhere;
}
.arena-footer__contact-val--mono{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.02em;
}

.arena-footer__legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:8px 24px;
  padding-block:18px;
  border-top:1px solid var(--line-soft);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.06em;
  color:var(--mist);
}
.arena-footer__legal-note{
  color:var(--grey);
  max-width:56ch;
}

/* ---------- 13. 响应式 ---------- */
@media (max-width:1080px){
  .arena-footer__grid{grid-template-columns:1fr 1fr}
  .arena-footer__brand{grid-column:1 / -1}
  .arena-footer__col:last-child{grid-column:1 / -1}
}

@media (max-width:900px){
  html{scroll-padding-top:88px}

  .arena-nav-toggle{display:inline-flex}

  .arena-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    margin-left:0;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:10px var(--pad-x) 18px;
    background:var(--glass-strong);
    -webkit-backdrop-filter:blur(18px);
    backdrop-filter:blur(18px);
    border-bottom:1px solid var(--line);
    box-shadow:0 24px 40px -28px rgba(0,0,0,.9);
    opacity:0;
    visibility:hidden;
    transform:translateY(-8px);
    transition:opacity var(--dur) var(--ease),
               transform var(--dur) var(--ease),
               visibility var(--dur) var(--ease);
  }
  .arena-header[data-open="true"] .arena-nav{
    opacity:1;
    visibility:visible;
    transform:translateY(0);
  }

  .arena-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .arena-nav__link{
    width:100%;
    justify-content:flex-start;
    padding:13px 10px;
    font-size:15px;
    border-bottom:1px solid var(--line-soft);
    border-radius:0;
  }
  .arena-nav__link:hover{
    background:rgba(53,242,208,.08);
    border-color:transparent;
    border-bottom-color:rgba(53,242,208,.38);
  }
  .arena-nav__link[aria-current="page"]{
    border-radius:var(--radius-sm);
    border-bottom-color:var(--orange);
  }
  .arena-nav__index{font-size:10.5px;padding:1px 4px}

  .arena-header__cta{
    margin-top:16px;
    width:100%;
  }

  .arena-brand__status{font-size:10px}
}

@media (max-width:700px){
  .arena-grid--2,
  .arena-grid--3,
  .arena-grid--split{grid-template-columns:minmax(0,1fr)}

  .arena-footer__grid{grid-template-columns:1fr;gap:28px}
  .arena-footer__brand,
  .arena-footer__col:last-child{grid-column:auto}
  .arena-footer__legal{flex-direction:column;align-items:flex-start}
}

@media (max-width:520px){
  .arena-brand__status{display:none}
  .arena-brand__name{font-size:17px}
  .arena-brand__mark{height:28px}
  .arena-nav-toggle__label{display:none}
  .arena-nav-toggle{padding:9px 11px}
}

/* ---------- 14. 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
}