/* ============================================================
   运动场上 · 内页样式
   功能介绍 / 下载 / 关于 / 反馈 / 协议 / 404
   ============================================================ */

/* ---------- 功能介绍：分块展示 ---------- */
.feature-block{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:clamp(28px,4.5vw,64px);align-items:center;
  padding:clamp(40px,6vw,72px) 0;
  border-top:1px solid var(--sep);
}
.feature-block:first-of-type{border-top:0;padding-top:0;}
.feature-block.flip .fb-media{order:-1;}
.fb-index{
  display:inline-flex;align-items:center;gap:9px;
  font-size:11.5px;font-weight:700;letter-spacing:.14em;color:var(--text-3);
  margin-bottom:14px;
}
.fb-index::after{content:"";width:34px;height:1px;background:var(--sep-strong);}
.fb-copy .h2{font-size:clamp(24px,2.8vw,34px);margin-bottom:14px;}
.fb-copy .lead{font-size:15.5px;margin-bottom:22px;}
.fb-list{display:flex;flex-direction:column;gap:11px;margin-bottom:24px;}
.fb-list li{display:flex;gap:10px;font-size:14px;color:var(--text-2);line-height:1.6;}
.fb-list li svg{width:16px;height:16px;flex:none;margin-top:3px;color:var(--green-600);}
.fb-list strong{color:var(--text);font-weight:600;}
.fb-tags{display:flex;flex-wrap:wrap;gap:7px;}
.fb-tags span{
  padding:5px 11px;border-radius:var(--r-full);background:var(--fill);
  font-size:11.5px;color:var(--text-2);font-weight:550;
}
.fb-media{position:relative;display:flex;justify-content:center;align-items:center;}
.fb-media .phone{width:clamp(230px,25vw,282px);}
.fb-canvas{
  position:relative;width:100%;max-width:440px;border-radius:var(--r-2xl);
  background:linear-gradient(155deg,#0D5743,#07231C 68%);
  padding:clamp(20px,3vw,30px);
  box-shadow:var(--sh-3);overflow:hidden;
}
.fb-canvas.light{background:var(--card);border:1px solid var(--hairline);box-shadow:var(--sh-2);}
.fb-canvas .pitch{opacity:.34;}

/* 赛事小卡（功能介绍页复用） */
.mini-board{
  position:relative;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);
  border-radius:var(--r-lg);padding:16px;color:#fff;
}
.mini-board+.mini-board{margin-top:10px;}
.mini-board .top{display:flex;align-items:center;justify-content:space-between;font-size:11px;color:rgba(255,255,255,.55);margin-bottom:10px;}
.mini-row{display:flex;align-items:center;justify-content:space-between;padding:7px 0;}
.mini-row .t{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:600;}
.mini-row .t i{width:18px;height:18px;border-radius:50%;background:linear-gradient(150deg,#B7E2F8,#6FB9E8);}
.mini-row .t i.alt{background:linear-gradient(150deg,#FFF8E7,#F3D48A);}
.mini-row .s{font-size:15px;font-weight:750;font-variant-numeric:tabular-nums;}
.mini-board .foot{display:flex;justify-content:space-between;margin-top:8px;padding-top:8px;border-top:1px solid rgba(255,255,255,.1);font-size:10.5px;color:rgba(255,255,255,.4);}

/* 社区帖（功能介绍页复用） */
.mini-posts{display:flex;flex-direction:column;gap:10px;}
.mini-posts .post{padding:14px;margin:0;border-radius:var(--r-lg);}
.mini-posts .post .thumb{height:96px;}
.mini-posts .post p{font-size:12.5px;}

/* 个人主页示意（功能介绍页复用） */
.pf-head{display:flex;gap:12px;align-items:center;padding:20px 18px 14px;background:linear-gradient(160deg,#0D5743,#0A3327);color:#fff;}
.pf-avatar{
  width:44px;height:44px;border-radius:50%;flex:none;display:grid;place-items:center;
  background:linear-gradient(150deg,#FF8A3C,#F26B1D);font-weight:700;font-size:15px;
  box-shadow:0 4px 12px rgba(0,0,0,.22);
}
.pf-id b{display:block;font-size:14px;font-weight:650;}
.pf-id span{display:block;font-size:10.5px;color:rgba(255,255,255,.6);margin-top:1px;}
.pf-id em{
  display:inline-block;margin-top:4px;font-style:normal;font-size:9.5px;font-weight:600;
  padding:1px 7px;border-radius:999px;background:rgba(255,255,255,.14);color:#FFD3B4;
}
.pf-stats{display:grid;grid-template-columns:repeat(3,1fr);padding:12px 18px;background:#fff;border-bottom:1px solid #EFEFF4;}
.pf-stats div{text-align:center;}
.pf-stats b{display:block;font-size:14px;font-weight:750;color:#0B0B0F;font-variant-numeric:tabular-nums;}
.pf-stats span{font-size:9.5px;color:rgba(60,60,67,.45);}
.pf-tabs{display:flex;gap:14px;padding:11px 18px 9px;background:#fff;font-size:11px;color:rgba(60,60,67,.45);border-bottom:1px solid #EFEFF4;}
.pf-tabs b{color:#0B0B0F;font-weight:650;position:relative;}
.pf-tabs b::after{content:"";position:absolute;left:50%;bottom:-9px;transform:translateX(-50%);width:14px;height:2px;border-radius:2px;background:var(--brand);}
.pf-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:3px;background:#fff;padding:3px 0;}
.pf-grid i{
  display:block;aspect-ratio:1;background:
    radial-gradient(circle at 60% 45%,rgba(255,255,255,.28) 0 3px,transparent 4px),
    linear-gradient(140deg,#0D5743,#1AA377 60%,#0A3327);
}
.pf-grid i:nth-child(2n){background:linear-gradient(140deg,#F26B1D,#FFB27A 65%,#D9550C);}
.pf-grid i:nth-child(3n){background:linear-gradient(140deg,#123C30,#0A211A 65%,#158564);}
.pf-rows{background:#fff;padding:6px 18px 16px;}
.pf-rows span{display:flex;justify-content:space-between;font-size:10.5px;color:#0B0B0F;padding:7px 0;border-bottom:1px solid #F2F2F7;}
.pf-rows span:last-child{border-bottom:0;}
.pf-rows i{font-style:normal;color:rgba(60,60,67,.45);}

/* 弹幕画布 */
.dm-canvas{
  position:absolute;inset:0;pointer-events:none;overflow:hidden;
}
.dm-canvas span{
  position:absolute;left:16px;white-space:nowrap;max-width:70%;
  font-size:11.5px;color:rgba(255,255,255,.85);
  background:rgba(0,0,0,.32);border:1px solid rgba(255,255,255,.08);
  padding:5px 11px;border-radius:var(--r-full);
  animation:dmFloat 6s ease-in-out infinite alternate;
}
.dm-canvas span:nth-child(2){left:auto;right:14px;animation-delay:-1.4s;}
.dm-canvas span:nth-child(4){left:auto;right:22px;animation-delay:-2.6s;}
@keyframes dmFloat{from{transform:translateY(0);opacity:.82;}to{transform:translateY(-7px);opacity:1;}}

/* ---------- 下载页 ---------- */
.dl-grid{display:grid;grid-template-columns:1.18fr .82fr;gap:18px;align-items:start;}
.dl-card{
  position:relative;overflow:hidden;border-radius:var(--r-2xl);
  padding:clamp(24px,3vw,34px);
  background:var(--card);border:1px solid var(--hairline);box-shadow:var(--sh-1);
}
.dl-card.primary{
  color:#fff;border-color:transparent;box-shadow:var(--sh-3);
  background:
    radial-gradient(80% 80% at 88% 0%,rgba(242,107,29,.32) 0%,rgba(7,35,28,0) 58%),
    linear-gradient(155deg,#0D5743,#07231C 72%);
}
.dl-card.primary .pitch{opacity:.3;}
.dl-head{position:relative;display:flex;align-items:center;gap:14px;margin-bottom:20px;}
.plat-ico{
  width:52px;height:52px;border-radius:15px;display:grid;place-items:center;flex:none;
  background:var(--fill);color:var(--text);
}
.dl-card.primary .plat-ico{background:rgba(255,255,255,.1);color:#fff;}
.plat-ico svg{width:26px;height:26px;}
.dl-head h2{font-size:21px;font-weight:700;letter-spacing:-.015em;}
.dl-head p{font-size:12.5px;color:var(--text-2);}
.dl-card.primary .dl-head p{color:rgba(255,255,255,.6);}
.dl-spec{
  position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:12px;
  padding:16px 0 20px;margin-bottom:20px;border-top:1px solid var(--sep);border-bottom:1px solid var(--sep);
}
.dl-card.primary .dl-spec{border-color:rgba(255,255,255,.14);}
.dl-spec b{display:block;font-size:14px;font-weight:650;}
.dl-spec span{font-size:11px;color:var(--text-3);letter-spacing:.02em;}
.dl-card.primary .dl-spec span{color:rgba(255,255,255,.45);}
.dl-actions{position:relative;display:flex;flex-direction:column;gap:10px;}
.dl-actions .btn{width:100%;}
.dl-hint{position:relative;margin-top:12px;font-size:11.5px;color:var(--text-3);display:flex;gap:6px;align-items:flex-start;}
.dl-card.primary .dl-hint{color:rgba(255,255,255,.45);}
.dl-hint svg{width:13px;height:13px;flex:none;margin-top:2px;}
.soon{display:inline-flex;align-items:center;gap:5px;padding:3px 9px;border-radius:var(--r-full);background:var(--fill);font-size:10.5px;font-weight:600;color:var(--text-2);}
.dl-card.primary .soon{background:rgba(255,255,255,.12);color:rgba(255,255,255,.8);}

.checksum{
  margin-top:14px;padding:12px 14px;border-radius:var(--r-sm);
  background:rgba(0,0,0,.18);border:1px solid rgba(255,255,255,.1);
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:10.5px;line-height:1.5;color:rgba(255,255,255,.5);word-break:break-all;
}
.checksum b{display:block;font-family:inherit;color:rgba(255,255,255,.4);font-weight:600;letter-spacing:.08em;font-size:9.5px;margin-bottom:4px;}
.copy-btn{
  display:inline-block;margin-top:8px;padding:3px 10px;border-radius:999px;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.16);
  font-family:inherit;font-size:10px;color:rgba(255,255,255,.7);
  transition:background .2s,color .2s;
}
.copy-btn:hover{background:rgba(255,255,255,.18);color:#fff;}

.install{display:flex;flex-direction:column;gap:2px;margin-top:26px;}
.install-step{
  display:grid;grid-template-columns:40px 1fr;gap:16px;padding:18px 0;
  border-top:1px solid var(--sep);
}
.install-step:last-child{border-bottom:1px solid var(--sep);}
.install-step .n{
  width:32px;height:32px;border-radius:50%;display:grid;place-items:center;
  background:var(--green-900);color:#fff;font-size:13px;font-weight:700;
  font-variant-numeric:tabular-nums;
}
.install-step b{display:block;font-size:15px;margin-bottom:3px;}
.install-step p{font-size:13.5px;color:var(--text-2);}
.install-step code{
  font-family:ui-monospace,Menlo,Consolas,monospace;font-size:12px;
  background:var(--fill);padding:1px 6px;border-radius:5px;
}

.req-table{width:100%;border-collapse:collapse;font-size:13.5px;}
.req-table th,.req-table td{text-align:left;padding:13px 4px;border-bottom:1px solid var(--sep);vertical-align:top;}
.req-table th{font-weight:600;color:var(--text-3);font-size:11.5px;letter-spacing:.06em;text-transform:uppercase;width:34%;}
.req-table td{color:var(--text-2);}
.req-table tr:first-child th,.req-table tr:first-child td{border-top:1px solid var(--sep);}

/* ---------- 关于页 ---------- */
.values{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
.value-card{background:var(--card);border:1px solid var(--hairline);border-radius:var(--r-xl);padding:28px 24px;}
.value-card .idx{font-size:11px;font-weight:700;letter-spacing:.14em;color:var(--brand);margin-bottom:16px;}
.value-card h3{margin-bottom:8px;}
.value-card p{font-size:13.5px;color:var(--text-2);line-height:1.7;}

.timeline{position:relative;max-width:760px;margin:0 auto;padding-left:26px;}
.timeline::before{
  content:"";position:absolute;left:5px;top:8px;bottom:8px;width:1px;
  background:linear-gradient(180deg,var(--brand),var(--sep) 40%,var(--sep));
}
.tl-item{position:relative;padding:0 0 34px 8px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";position:absolute;left:-26px;top:6px;width:11px;height:11px;border-radius:50%;
  background:var(--card);border:2px solid var(--sep-strong);
}
.tl-item.now::before{background:var(--brand);border-color:var(--brand);box-shadow:0 0 0 5px rgba(242,107,29,.14);}
.tl-meta{display:flex;align-items:center;gap:10px;margin-bottom:6px;}
.tl-meta .ver{font-size:12px;font-weight:700;color:var(--brand);letter-spacing:.03em;font-variant-numeric:tabular-nums;}
.tl-meta .date{font-size:11.5px;color:var(--text-3);}
.tl-item h3{font-size:16.5px;margin-bottom:3px;}
.tl-item p{font-size:13.5px;color:var(--text-2);max-width:56ch;}

.about-split{display:grid;grid-template-columns:.9fr 1.1fr;gap:clamp(28px,5vw,64px);align-items:center;}
.about-figure{
  position:relative;border-radius:var(--r-2xl);overflow:hidden;aspect-ratio:4/3;
  background:linear-gradient(150deg,#0D5743,#07231C);
  display:grid;place-items:center;
}
.about-figure .pitch{opacity:.6;}
.about-figure .mark{
  position:relative;text-align:center;color:#fff;
}
.about-figure .mark img{width:64px;height:64px;border-radius:18px;margin:0 auto 14px;box-shadow:var(--sh-3);}
.about-figure .mark b{display:block;font-size:20px;letter-spacing:.02em;}
.about-figure .mark span{font-size:11.5px;letter-spacing:.22em;color:rgba(255,255,255,.45);text-transform:uppercase;}

/* ---------- 联系页 ---------- */
.contact-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:24px;align-items:start;}
.contact-channels{display:flex;flex-direction:column;gap:12px;}
.channel{
  display:flex;gap:14px;align-items:flex-start;padding:18px;
  background:var(--card);border:1px solid var(--hairline);border-radius:var(--r-lg);
  transition:border-color .2s,transform .25s var(--ease);
}
.channel:hover{border-color:rgba(242,107,29,.3);transform:translateY(-2px);}
.channel .ci{
  width:38px;height:38px;border-radius:11px;flex:none;display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand);
}
.channel .ci svg{width:18px;height:18px;}
.channel b{display:block;font-size:14px;margin-bottom:2px;}
.channel p{font-size:12.5px;color:var(--text-2);line-height:1.55;}
.channel .val{display:block;margin-top:6px;font-size:12.5px;font-weight:600;color:var(--brand);word-break:break-all;}

.guideline{background:var(--green-tint);border:1px solid rgba(21,133,100,.16);border-radius:var(--r-lg);padding:18px;}
.guideline h3{font-size:14px;margin-bottom:6px;color:var(--green-800);}
.guideline p{font-size:12.5px;color:rgba(10,51,39,.7);line-height:1.65;}

/* ---------- 协议页 ---------- */
.legal-layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:48px;align-items:start;}
.legal-toc{position:sticky;top:calc(var(--nav-h) + 24px);}
.legal-toc h4{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--text-3);margin-bottom:12px;}
.legal-toc a{display:block;padding:6px 0;font-size:13px;color:var(--text-2);border-left:2px solid transparent;padding-left:12px;margin-left:-2px;}
.legal-toc a:hover{color:var(--brand);border-left-color:var(--brand);}
.legal-body{max-width:760px;}
.legal-body h2{font-size:20px;margin:36px 0 10px;letter-spacing:-.01em;}
.legal-body h2:first-child{margin-top:0;}
.legal-body h3{font-size:15px;margin:20px 0 6px;}
.legal-body p{font-size:14px;line-height:1.85;color:var(--text-2);margin-bottom:10px;}
.legal-body ul{margin:0 0 12px;padding-left:2px;}
.legal-body li{position:relative;padding-left:16px;font-size:14px;line-height:1.8;color:var(--text-2);margin-bottom:4px;}
.legal-body li::before{content:"";position:absolute;left:0;top:.75em;width:4px;height:4px;border-radius:50%;background:var(--brand);}
.legal-body strong{color:var(--text);font-weight:600;}
.legal-note{
  border-left:3px solid var(--brand);background:var(--brand-soft);
  padding:12px 16px;border-radius:0 var(--r-sm) var(--r-sm) 0;
  font-size:12.5px;color:#8A4515;line-height:1.7;margin:16px 0 24px;
}

/* ---------- 404 ---------- */
.err-wrap{min-height:100vh;display:grid;place-items:center;text-align:center;padding:120px 0 80px;position:relative;overflow:hidden;
  background:radial-gradient(80% 70% at 50% 20%,rgba(21,133,100,.35),transparent 60%),linear-gradient(160deg,#0A3327,#051B15);
  color:#fff;}
.err-wrap .code{font-size:clamp(80px,14vw,140px);font-weight:800;letter-spacing:-.05em;line-height:1;opacity:.16;}
.err-wrap h1{font-size:clamp(24px,3.4vw,34px);margin:6px 0 12px;position:relative;}
.err-wrap p{color:rgba(255,255,255,.6);margin-bottom:28px;}

@media (max-width:1024px){
  .feature-block{grid-template-columns:1fr;gap:30px;}
  .feature-block.flip .fb-media{order:0;}
  .fb-media{order:-1;}
  .dl-grid{grid-template-columns:1fr;}
  .about-split{grid-template-columns:1fr;gap:30px;}
  .contact-grid{grid-template-columns:1fr;}
  .values{grid-template-columns:1fr;gap:12px;}
  .legal-layout{grid-template-columns:1fr;gap:24px;}
  .legal-toc{position:static;display:flex;flex-wrap:wrap;gap:6px 14px;padding-bottom:16px;border-bottom:1px solid var(--sep);}
  .legal-toc a{border-left:0;padding:4px 0;margin:0;}
  .legal-toc h4{width:100%;margin-bottom:4px;}
}
@media (max-width:720px){
  .dl-spec{grid-template-columns:1fr 1fr;gap:10px;}
  .install-step{grid-template-columns:34px 1fr;gap:12px;}
  .feature-block{padding:44px 0;}
  .fb-copy .lead{font-size:14.5px;}
}