/* ============================================================
   好兄弟快上号 · 状态页
   设计语言取自 mimo.xiaomi.com/zh：
   暖白纸底 + 纯黑 1px 网格线 + 无边角/无阴影 + 衬线副标
   ============================================================ */

:root{
  --paper:#faf7f5;
  --ink:#000;
  --ink-2:rgba(0,0,0,.58);
  --ink-3:rgba(0,0,0,.36);
  --hair:#000;
  --hair-soft:rgba(0,0,0,.14);
  --pad-x:48px;
  --sans:'MiSans-Regular',-apple-system,BlinkMacSystemFont,'PingFang SC','Microsoft YaHei',sans-serif;
  --sans-b:'MiSans-Semibold','MiSans-Regular',-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;
  --sans-x:'MiSans-Bold','MiSans-Semibold',-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;
  --serif:'PTSerif-Regular','NotoSerifSC','Songti SC','SimSun',serif;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
h1,h2,h3,p{margin:0}

.frame{
  max-width:1440px;
  margin:0 auto;
  background:var(--paper);
  border-left:1px solid var(--hair);
  border-right:1px solid var(--hair);
}
@media (max-width:1440px){
  .frame{border-left:none;border-right:none}
}

/* ---------------- 导航 ---------------- */
.nav{
  position:sticky;top:0;z-index:20;
  height:72px;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 32px;
  background:var(--paper);
  border-bottom:1px solid var(--hair);
}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{
  width:15px;height:15px;background:var(--ink);display:block;
}
.brand-name{
  font-family:var(--sans-x);
  font-size:19px;
  letter-spacing:-.01em;
}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a{
  font-size:15px;
  letter-spacing:.01em;
  transition:opacity .18s;
}
.nav-links a:hover{opacity:.5}
.nav-cta{
  display:inline-flex;align-items:center;line-height:1;
  border:2px solid var(--ink);
  padding:11px 20px;
  font-family:var(--sans-b);
  font-weight:600;
  transition:background .18s,color .18s;
}
.nav-cta:hover{background:var(--ink);color:var(--paper);opacity:1}

/* ---------------- Hero ---------------- */
.hero{
  position:relative;
  overflow:hidden;
  padding:118px var(--pad-x) 88px;
  border-bottom:1px solid var(--hair);
  text-align:center;
}
.hero-pattern{
  position:absolute;inset:-40px 0 0;
  background-repeat:repeat;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='380' height='230'%3E%3Cg fill='%23000' fill-opacity='.045' font-family='Helvetica,Arial,sans-serif' font-weight='700' font-size='76' letter-spacing='6'%3E%3Ctext x='-24' y='86'%3ETS3%3C/text%3E%3Ctext x='166' y='192'%3ETS3%3C/text%3E%3C/g%3E%3C/svg%3E");
  pointer-events:none;
}
.hero-body{position:relative}
.hero-title{
  font-family:var(--sans-x);
  font-size:clamp(46px,7.8vw,106px);
  font-weight:700;
  line-height:1.02;
  letter-spacing:-.045em;
}
.hero-line{
  margin-top:30px;
  display:inline-flex;align-items:center;gap:10px;
  font-size:16px;
  color:var(--ink-2);
}
.dot{
  width:8px;height:8px;border-radius:50%;
  background:var(--ink);
  display:inline-block;
}
.dot.is-off{
  background:transparent;
  box-shadow:inset 0 0 0 1.5px var(--ink);
}
.dot.is-live{animation:breathe 2.4s ease-in-out infinite}
@keyframes breathe{0%,100%{opacity:1}50%{opacity:.35}}
.hero-foot{
  position:relative;
  margin-top:64px;
  font-size:12px;
  letter-spacing:.16em;
  color:var(--ink-3);
}

/* ---------------- 双栏 ---------------- */
.split{
  display:grid;
  grid-template-columns:1fr 1fr;
  border-bottom:1px solid var(--hair);
}
.split-cell{
  position:relative;
  display:flex;flex-direction:column;
  padding:56px var(--pad-x) 0;
  min-height:392px;
  border-right:1px solid var(--hair);
  overflow:hidden;
}
.split-cell:last-child{border-right:none}
.cell-title{
  font-family:var(--sans-x);
  font-size:clamp(24px,2.6vw,34px);
  letter-spacing:-.025em;
  line-height:1.15;
}
.cell-desc{
  margin-top:14px;
  font-size:15px;
  color:var(--ink-2);
  max-width:34ch;
}
.cell-facts{
  margin-top:30px;
  display:grid;
  grid-template-columns:1fr 1fr;
  column-gap:36px;
  align-content:start;
}
.fact{
  display:flex;flex-direction:column;gap:5px;
  padding:13px 0;
  border-bottom:1px solid var(--hair-soft);
}
.fact span{font-size:11.5px;letter-spacing:.1em;color:var(--ink-3)}
.fact b{font-family:var(--sans-b);font-weight:600;font-size:14.5px;letter-spacing:-.005em}

.readout{display:flex;align-items:baseline;gap:10px;margin-top:26px}
.readout-num{
  font-family:var(--sans-x);
  font-size:clamp(64px,6.6vw,92px);
  line-height:.92;
  letter-spacing:-.055em;
  font-variant-numeric:tabular-nums;
}
.readout-of{font-size:19px;color:var(--ink-3)}
.readout-sub{
  margin-top:14px;
  font-size:12.5px;
  letter-spacing:.1em;
  color:var(--ink-2);
}

.cell-art{
  margin:auto calc(var(--pad-x) * -1) 0;
  height:158px;
  opacity:.5;
}
.cell-art svg{width:100%;height:100%;display:block}
.cell-art path,.cell-art ellipse,.cell-art circle{
  fill:none;stroke:var(--ink);stroke-width:1.2;vector-effect:non-scaling-stroke;
}

/* ---------------- 区块标题带 ---------------- */
.band-head{
  display:flex;align-items:center;justify-content:space-between;gap:40px;
  padding:54px var(--pad-x);
  border-bottom:1px solid var(--hair);
  scroll-margin-top:90px;
}
.band-head h2{
  font-family:var(--sans-x);
  font-size:clamp(30px,3.6vw,56px);
  letter-spacing:-.035em;
  line-height:1.05;
  white-space:nowrap;
}
.band-head p{
  font-size:16px;
  color:var(--ink-2);
  line-height:1.6;
  max-width:48ch;
  text-align:right;
}

/* ---------------- 数据 ---------------- */
.stats{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  border-bottom:1px solid var(--hair);
}
.stat{
  display:flex;flex-direction:column;gap:16px;
  padding:32px var(--pad-x) 36px;
  border-right:1px solid var(--hair);
}
.stat:last-child{border-right:none}
.stat-k{font-size:12.5px;letter-spacing:.1em;color:var(--ink-3)}
.stat-v{
  font-family:var(--sans-x);
  font-size:clamp(32px,3.2vw,44px);
  white-space:nowrap;
  letter-spacing:-.035em;
  font-variant-numeric:tabular-nums;
  line-height:1;
}

/* ---------------- 行列表 ---------------- */
.rows{border-bottom:1px solid var(--hair)}
.row{
  --fg:#000;
  --fg-2:rgba(0,0,0,.58);
  --fg-3:rgba(0,0,0,.36);
  display:grid;
  grid-template-columns:118px 1fr 84px;
  align-items:center;
  color:var(--fg);
  border-bottom:1px solid var(--hair);
  transition:background .18s ease,color .18s ease;
}
.row:last-child{border-bottom:none}
.row-idx{
  padding:40px 0 40px var(--pad-x);
  font-size:15px;
  color:var(--fg-3);
  font-variant-numeric:tabular-nums;
  align-self:center;
}
.row-main{padding:34px 0}
.row-main h3{
  font-family:var(--serif);
  font-size:clamp(22px,2.2vw,30px);
  font-weight:400;
  letter-spacing:-.01em;
}
.row-main p{
  margin-top:10px;
  font-size:14px;
  line-height:1.65;
  color:var(--fg-2);
}
.row-arrow{
  font-size:22px;
  text-align:right;
  padding-right:var(--pad-x);
  color:var(--fg);
  transition:transform .18s ease;
}
a.row:hover{
  background:var(--ink);
  --fg:#faf7f5;
  --fg-2:rgba(255,255,255,.6);
  --fg-3:rgba(255,255,255,.42);
}
a.row:hover .row-arrow{transform:translateX(6px)}
.row-static{cursor:default}
.row-empty{grid-template-columns:1fr}
.row-empty .row-main{padding-left:var(--pad-x)}
.row-empty p{color:var(--ink-2);font-family:var(--sans);font-size:15px}
.roster-nick{font-family:var(--sans-b);font-size:16px}

/* ---------------- 频道网格 ---------------- */
.grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  border-bottom:1px solid var(--hair);
}
.cell{
  display:block;
  position:relative;
  border-right:1px solid var(--hair);
  border-bottom:1px solid var(--hair);
  background:var(--paper);
  color:var(--ink);
  transition:background .2s ease,color .2s ease;
}
.cell:nth-child(4n){border-right:none}
.cell img{
  display:block;width:100%;aspect-ratio:2.15/1;object-fit:cover;
  border-bottom:1px solid var(--hair);
  filter:grayscale(1) contrast(1.04);
  opacity:.88;
  transition:filter .25s ease,opacity .25s ease;
}
.cell-body{
  display:flex;align-items:baseline;justify-content:space-between;gap:10px;
  padding:17px 20px 19px;
}
.cell-name{
  font-family:var(--sans-b);
  font-weight:600;
  font-size:16px;
  letter-spacing:-.01em;
}
.cell-num{
  font-size:12.5px;
  color:var(--ink-3);
  font-variant-numeric:tabular-nums;
  white-space:nowrap;
}
.cell.is-live .cell-num{color:var(--ink)}
.cell.is-live .cell-num::before{
  content:"";display:inline-block;width:6px;height:6px;border-radius:50%;
  background:currentColor;margin-right:6px;vertical-align:1px;
}
.cell:hover{background:var(--ink)}
.cell:hover .cell-name,.cell:hover .cell-num{color:var(--paper)}
.cell:hover img{filter:none;opacity:1}

.cell-ph{
  grid-column:1 / -1;
  display:flex;align-items:center;justify-content:center;
  min-height:220px;
  border-right:none;
  color:var(--ink-3);
  font-size:14px;
  letter-spacing:.06em;
}

.cell-cta{
  display:flex;flex-direction:column;justify-content:space-between;
  padding:24px 22px 22px;
  min-height:206px;
  background:var(--ink);
  color:var(--paper);
}
.cell-cta h3{
  font-family:var(--serif);
  font-size:22px;
  font-weight:400;
  line-height:1.35;
}
.cell-cta p{margin-top:12px;font-size:13px;color:rgba(255,255,255,.6);line-height:1.6}
.cell-cta .cta-arrow{font-size:22px;margin-top:24px}
.cell-cta:hover{background:#000}
.cell-cta:hover h3{color:#fff}

/* ---------------- 页脚 ---------------- */
.foot{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px 32px;
  padding:36px var(--pad-x) 44px;
  font-size:13px;
  color:var(--ink-2);
}
.foot-left{display:flex;align-items:center;gap:10px}
.foot-sep{color:var(--ink-3)}
.foot-right{margin-left:auto;color:var(--ink-3);font-variant-numeric:tabular-nums}
.foot-legal{
  width:100%;
  display:flex;flex-wrap:wrap;gap:20px;
  padding-top:18px;
  border-top:1px solid var(--hair-soft);
  font-size:12px;
  color:var(--ink-3);
}

/* ---------------- 响应式 ---------------- */
@media (max-width:1180px){
  :root{--pad-x:32px}
  .band-head p{max-width:40ch}
  .grid{grid-template-columns:repeat(3,1fr)}
  .cell:nth-child(4n){border-right:1px solid var(--hair)}
  .cell:nth-child(3n){border-right:none}
  .stats{grid-template-columns:repeat(4,1fr)}
  .stat{padding:28px 32px 30px}
}
@media (max-width:900px){
  .nav-links{gap:20px}
  .nav-links a:not(.nav-cta){display:none}
  .hero{padding:80px var(--pad-x) 64px}
  .split{grid-template-columns:1fr}
  .split-cell{border-right:none;border-bottom:1px solid var(--hair);min-height:0;padding-bottom:0}
  .split-cell:last-child{border-bottom:none}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2n){border-right:none}
  .stat:nth-child(-n+2){border-bottom:1px solid var(--hair)}
  .band-head{flex-direction:column;align-items:flex-start;gap:18px;padding:40px var(--pad-x)}
  .band-head p{text-align:left}
  .band-head h2{white-space:normal}
  .grid{grid-template-columns:repeat(2,1fr)}
  .cell:nth-child(3n){border-right:1px solid var(--hair)}
  .cell:nth-child(2n){border-right:none}
  .row{grid-template-columns:64px 1fr 48px}
  .row-idx{padding-left:var(--pad-x);font-size:13px}
  .row-main{padding:26px 0}
  .row-arrow{padding-right:var(--pad-x);font-size:18px}
  .foot{padding:28px var(--pad-x) 36px}
}
@media (max-width:560px){
  :root{--pad-x:20px}
  .stat{padding:22px 20px 26px}
  .stat-v{font-size:27px;letter-spacing:-.03em}
  .brand-name{font-size:17px}
  .hero-title{font-size:clamp(38px,11vw,56px);letter-spacing:-.04em}
  .hero-line{font-size:14px;flex-wrap:wrap;justify-content:center}
  .cell-facts{grid-template-columns:1fr}
  .row{grid-template-columns:52px 1fr 36px}
  .cell-body{flex-direction:column;gap:4px}
  .cell-cta{min-height:170px}
}