/* =========================================================
   components.css — 各区块组件样式（导航 / Hero / 行情 / 卡片 / FAQ / 页脚）
   ========================================================= */

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:50px;padding:0 24px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:650;letter-spacing:-.01em;white-space:nowrap;
  transition:transform .18s ease,box-shadow .25s ease,background .2s ease,border-color .2s ease,color .2s ease;
}
.btn:active{transform:translateY(1px) scale(.995)}
.btn-gold{
  background:linear-gradient(180deg,var(--gold-hi),var(--gold));color:#231603;
  box-shadow:0 10px 26px -12px rgba(233,163,60,.9),inset 0 1px 0 rgba(255,255,255,.45);
}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 16px 34px -14px rgba(233,163,60,.95)}
.btn-line{background:transparent;color:#fff;border-color:rgba(255,255,255,.2)}
.btn-line:hover{background:rgba(255,255,255,.07);border-color:rgba(255,255,255,.34);transform:translateY(-2px)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{transform:translateY(-2px);box-shadow:0 16px 30px -16px rgba(10,11,13,.9)}
.btn-sm{height:42px;padding:0 18px;font-size:14px}

/* ---------- nav ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:80;transition:background .3s ease,border-color .3s ease,backdrop-filter .3s ease}
.nav.scrolled{
  background:rgba(10,11,13,.82);backdrop-filter:saturate(160%) blur(14px);
  -webkit-backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:74px;gap:24px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:750;font-size:18px;letter-spacing:-.03em}
.brand-mark{width:32px;height:32px;flex:none;display:grid;place-items:center;border-radius:9px;background:linear-gradient(150deg,#FFD08A,var(--gold) 60%,#C9822A)}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{
  position:relative;padding:8px 14px;border-radius:8px;font-size:14.5px;font-weight:550;
  color:rgba(255,255,255,.66);transition:color .2s ease,background .2s ease;
}
.nav-links a:hover{color:#fff}
.nav-links a.active{color:#fff}
.nav-links a.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;background:var(--gold);
}
.nav-cta{display:flex;align-items:center;gap:10px}
.nav-toggle{display:none;width:42px;height:42px;border-radius:11px;border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.04);color:#fff;place-items:center}

/* ---------- hero ---------- */
.hero{
  position:relative;background:
    radial-gradient(900px 520px at 78% -10%,rgba(233,163,60,.16),transparent 62%),
    radial-gradient(700px 420px at 12% 8%,rgba(233,163,60,.07),transparent 60%),
    linear-gradient(180deg,#0A0B0D,#0C0D10 55%,#0A0B0D);
  padding:calc(74px + clamp(36px,5vw,64px)) 0 clamp(48px,6vw,76px);
  overflow:hidden;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.028) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.028) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse 80% 70% at 50% 0%,#000,transparent 72%);
  -webkit-mask-image:radial-gradient(ellipse 80% 70% at 50% 0%,#000,transparent 72%);
}
.hero-grid{position:relative;display:grid;grid-template-columns:1.02fr .98fr;gap:clamp(28px,4vw,56px);align-items:center}
.hero-copy{color:#fff;position:relative;z-index:2}
.hero-tag{
  display:inline-flex;align-items:center;gap:9px;margin-bottom:26px;
  padding:7px 14px 7px 10px;border-radius:999px;
  border:1px solid rgba(233,163,60,.3);background:rgba(233,163,60,.08);
  font-size:12.5px;font-weight:600;color:var(--gold-hi);letter-spacing:.02em;
}
.hero-tag i{width:6px;height:6px;border-radius:50%;background:var(--gold);box-shadow:0 0 0 3px rgba(233,163,60,.18);display:block}
.hero h1{font-size:clamp(38px,5vw,64px);letter-spacing:-.04em;line-height:1.05;font-weight:800}
.hero h1 .gold{
  background:linear-gradient(100deg,#FFD79A,#E9A33C 55%,#C9822A);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{margin-top:24px;max-width:500px;font-size:clamp(15px,1.45vw,17.5px);line-height:1.75;color:rgba(255,255,255,.62)}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}

.qr-row{display:flex;align-items:center;gap:18px;margin-top:36px;flex-wrap:wrap}
.qr-box{
  width:112px;height:112px;flex:none;border-radius:12px;background:#fff;padding:8px;
  box-shadow:0 16px 40px -20px rgba(0,0,0,.9);
}
.qr-box svg{width:100%;height:100%}
.qr-text b{display:block;color:#fff;font-size:15px;font-weight:700;margin-bottom:8px}
.qr-text p{font-size:13px;color:rgba(255,255,255,.5);line-height:1.6}
.dl-mini{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap}
.dl-mini a{
  display:inline-flex;align-items:center;gap:7px;height:36px;padding:0 13px;border-radius:9px;
  border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.04);
  color:rgba(255,255,255,.8);font-size:12.5px;font-weight:600;
  transition:background .2s ease,border-color .2s ease,color .2s ease;
}
.dl-mini a:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.26);color:#fff}

.hero-meta{display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:34px;padding-top:24px;border-top:1px solid rgba(255,255,255,.1);color:rgba(255,255,255,.45);font-size:13px}
.hero-meta b{color:#fff;font-weight:700;font-family:var(--mono)}

/* ---------- phone ---------- */
.phone-stage{position:relative;display:flex;justify-content:center;padding:6px 0}
.phone{
  position:relative;width:min(316px,80vw);flex:0 0 auto;min-width:0;
  border-radius:46px;padding:9px;
  background:linear-gradient(160deg,#3A3D44,#101216 52%,#050608);
  box-shadow:0 50px 90px -40px rgba(0,0,0,.95),0 0 0 1px rgba(255,255,255,.09) inset,0 0 60px -20px rgba(233,163,60,.25);
  transform:rotate(1.6deg);transition:transform .6s cubic-bezier(.2,.8,.2,1);
}
.phone:hover{transform:rotate(0) translateY(-6px)}
.phone-screen{
  position:relative;border-radius:38px;overflow:hidden;background:#0E1014;color:#fff;
  height:min(618px,140vw);display:flex;flex-direction:column;
}
.ps-status{display:flex;align-items:center;justify-content:space-between;padding:13px 22px 0;font-size:11px;font-weight:650;color:rgba(255,255,255,.85)}
.ps-status .bars{display:flex;gap:3px;align-items:flex-end}
.ps-status .bars b{display:block;width:3px;background:rgba(255,255,255,.85);border-radius:1px}
.ps-head{display:flex;align-items:center;justify-content:space-between;padding:14px 18px 10px}
.ps-head .t{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:750;letter-spacing:-.02em}
.ps-head .t .m{width:22px;height:22px;border-radius:7px;background:linear-gradient(150deg,#FFD08A,var(--gold));display:grid;place-items:center}
.ps-head .acts{display:flex;gap:10px;color:rgba(255,255,255,.55)}
.ps-quotes{padding:0 12px;display:flex;flex-direction:column;gap:7px}
.ps-q{display:flex;align-items:center;justify-content:space-between;padding:9px 11px;border-radius:11px;background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.05)}
.ps-q .n{font-size:11.5px;color:rgba(255,255,255,.72);font-weight:600}
.ps-q .n span{display:block;font-size:9px;color:rgba(255,255,255,.32);font-weight:500;letter-spacing:.02em}
.ps-q .v{text-align:right;font-family:var(--mono);font-size:13px;font-weight:700}
.ps-q .v span{display:block;font-size:9.5px;font-weight:600;opacity:.95}
.ps-chart{margin:12px 12px 0;border-radius:12px;background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.05);padding:8px 8px 4px}
.ps-chart .ct{display:flex;justify-content:space-between;align-items:center;padding:0 3px 6px;font-size:9.5px;color:rgba(255,255,255,.45)}
.ps-chart .ct b{color:#fff;font-size:10.5px;font-weight:700;font-family:var(--mono)}
.ps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;padding:14px 12px 0}
.ps-grid a{display:flex;flex-direction:column;align-items:center;gap:6px;font-size:9px;color:rgba(255,255,255,.6)}
.ps-grid i{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;background:rgba(255,255,255,.06);color:var(--gold-hi)}
.ps-banner{
  margin:auto 12px 14px;border-radius:13px;padding:10px 12px;
  background:linear-gradient(100deg,rgba(233,163,60,.9),rgba(201,130,42,.9));
  color:#231603;display:flex;align-items:center;justify-content:space-between;gap:8px;
}
.ps-banner b{font-size:11.5px;font-weight:800;line-height:1.25;display:block}
.ps-banner span{font-size:9px;opacity:.75;font-weight:600}
.ps-banner .arw{font-size:14px;opacity:.7}

.badge-float{
  position:absolute;z-index:3;padding:9px 18px;border-radius:12px;
  background:linear-gradient(160deg,#FFD08A,var(--gold) 55%,#C9822A);
  color:#2A1B05;font-size:16px;font-weight:800;letter-spacing:.02em;
  box-shadow:0 20px 40px -18px rgba(233,163,60,.95),inset 0 1px 0 rgba(255,255,255,.5);
  animation:floaty 6s ease-in-out infinite;
}
.bf-1{right:2%;top:26%;transform:rotate(6deg);animation-delay:-1.2s}
.bf-2{left:0%;bottom:26%;transform:rotate(-7deg);animation-delay:-3.4s}
.float-card{
  position:absolute;z-index:3;background:#fff;border-radius:14px;padding:10px 13px;
  display:flex;align-items:center;gap:10px;
  box-shadow:0 22px 44px -18px rgba(0,0,0,.75);
  animation:floaty 7s ease-in-out infinite;animation-delay:-2.2s;
}
.float-card .ic{width:28px;height:28px;border-radius:9px;display:grid;place-items:center;flex:none;background:var(--gold-dim);color:#B37B22}
.float-card b{display:block;font-size:12.5px;font-weight:750;color:#14161A;line-height:1.25}
.float-card span{font-size:10px;color:#6E7683}
.fc-1{left:-2%;top:12%}
@keyframes floaty{0%,100%{translate:0 0}50%{translate:0 -9px}}

/* ---------- ticker ---------- */
.ticker{
  background:#07080A;border-top:1px solid rgba(255,255,255,.07);border-bottom:1px solid rgba(255,255,255,.07);
  overflow:hidden;position:relative;
}
.ticker::before,.ticker::after{
  content:"";position:absolute;top:0;bottom:0;width:90px;z-index:2;pointer-events:none;
}
.ticker::before{left:0;background:linear-gradient(90deg,#07080A,transparent)}
.ticker::after{right:0;background:linear-gradient(270deg,#07080A,transparent)}
.ticker-track{display:flex;width:max-content;animation:scrollx 46s linear infinite}
.ticker:hover .ticker-track{animation-play-state:paused}
.ticker-row{display:flex;align-items:center;gap:0;padding:13px 0}
.tk{display:flex;align-items:center;gap:10px;padding:0 26px;border-right:1px solid rgba(255,255,255,.07);white-space:nowrap}
.tk .n{font-size:12.5px;color:rgba(255,255,255,.6);font-weight:600}
.tk .p{font-family:var(--mono);font-size:13.5px;font-weight:700;color:#fff}
.tk .c{font-family:var(--mono);font-size:12px;font-weight:600}
@keyframes scrollx{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ---------- market panel ---------- */
.market{background:var(--cream);position:relative}
.market-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px}
.market-head h2{font-size:clamp(26px,3.4vw,38px)}
.market-head p{color:var(--muted);font-size:14.5px;margin-top:10px}
.seg{display:inline-flex;padding:4px;border-radius:12px;background:#EFE9DD;gap:4px}
.seg button{
  border:0;background:transparent;border-radius:9px;padding:8px 16px;font-size:13.5px;font-weight:650;
  color:#6E6353;transition:background .2s ease,color .2s ease,box-shadow .2s ease;
}
.seg button.on{background:#fff;color:#1B1D22;box-shadow:0 2px 8px rgba(20,22,26,.1)}

.quote-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:18px}
.qc{
  position:relative;text-align:center;padding:22px 18px;border-radius:14px;border:1.5px solid transparent;
  background:#fff;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  cursor:pointer;
}
.qc:hover{transform:translateY(-3px);box-shadow:0 16px 34px -22px rgba(20,22,26,.5)}
.qc.up{background:linear-gradient(180deg,#FDF1F1,#fff);border-color:#F3D6D6}
.qc.down{background:linear-gradient(180deg,#EFF8F3,#fff);border-color:#D3EADF}
.qc.on.up{border-color:rgba(222,58,58,.55);box-shadow:0 0 0 3px rgba(222,58,58,.09)}
.qc.on.down{border-color:rgba(15,157,107,.5);box-shadow:0 0 0 3px rgba(15,157,107,.09)}
.qc .nm{font-size:14px;font-weight:700;color:#2A2E35}
.qc .pv{font-family:var(--mono);font-size:clamp(26px,3.1vw,34px);font-weight:750;letter-spacing:-.03em;margin:8px 0 4px}
.qc .cv{font-family:var(--mono);font-size:12.5px;font-weight:650;opacity:.9}
.qc .flag{position:absolute;top:10px;right:12px;font-size:10px;font-weight:700;letter-spacing:.06em;color:#A9A29A}

.panel{background:#fff;border:1px solid var(--line);border-radius:20px;padding:clamp(18px,2.6vw,26px);box-shadow:0 24px 60px -46px rgba(20,22,26,.5)}
.panel-head{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;margin-bottom:16px}
.panel-title{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:750;letter-spacing:-.02em}
.panel-title .dot{width:9px;height:9px;border-radius:50%;background:var(--gold);box-shadow:0 0 0 3px rgba(233,163,60,.16)}
.panel-title .live{font-size:10.5px;font-weight:700;color:#B37B22;background:var(--gold-dim);padding:2px 7px;border-radius:5px;letter-spacing:.06em}
.panel-title b{font-family:var(--mono);font-size:17px}

.stat-row{display:grid;grid-template-columns:repeat(6,1fr);gap:10px;margin-bottom:18px;padding-bottom:18px;border-bottom:1px solid var(--line-soft)}
.stat-item span{display:block;font-size:11.5px;color:#8B8578;margin-bottom:3px}
.stat-item b{font-family:var(--mono);font-size:14px;font-weight:700;color:#22252B}

.chart-tabs{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;background:#F4EFE5;border-radius:11px;padding:4px;margin-bottom:6px}
.chart-tabs button{border:0;background:transparent;border-radius:8px;padding:8px 0;font-size:13px;font-weight:650;color:#7A7266;transition:.2s}
.chart-tabs button.on{background:#fff;color:#1B1D22;box-shadow:0 2px 8px rgba(20,22,26,.1)}

.chart-wrap{position:relative}
#chart{width:100%;height:auto;display:block;touch-action:pan-y}
.chart-tip{
  position:absolute;pointer-events:none;opacity:0;transition:opacity .15s ease;
  background:rgba(17,19,24,.94);color:#fff;border-radius:9px;padding:8px 11px;
  font-size:11.5px;line-height:1.55;white-space:nowrap;z-index:4;
  box-shadow:0 12px 28px -12px rgba(0,0,0,.6);
}
.chart-tip b{font-family:var(--mono);font-size:13px;display:block}
.chart-tip span{color:rgba(255,255,255,.55);font-family:var(--mono)}
.panel-foot{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;margin-top:14px;font-size:11.5px;color:#9A9384}

/* ---------- features ---------- */
.features{background:var(--cream)}
.fgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.fcard{
  background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:26px 24px 28px;
  position:relative;overflow:hidden;transition:transform .3s cubic-bezier(.2,.8,.2,1),box-shadow .3s ease,border-color .3s ease;
}
.fcard::after{
  content:"";position:absolute;inset:0;pointer-events:none;border-radius:inherit;opacity:0;
  background:radial-gradient(400px circle at var(--mx,50%) var(--my,0),rgba(233,163,60,.1),transparent 62%);
  transition:opacity .35s ease;
}
.fcard:hover{transform:translateY(-4px);box-shadow:0 22px 48px -34px rgba(20,22,26,.55);border-color:#DED5C3}
.fcard:hover::after{opacity:1}
.fcard .ic{
  width:44px;height:44px;border-radius:13px;display:grid;place-items:center;margin-bottom:18px;
  background:linear-gradient(160deg,#FFF4E1,#FBE7C6);color:#B37B22;
  box-shadow:inset 0 1px 0 #fff;
}
.fcard h3{font-size:18px;margin-bottom:9px}
.fcard p{font-size:14.2px;color:var(--muted);line-height:1.7}
.fcard .tag{display:inline-block;margin-top:14px;font-size:11.5px;font-weight:700;color:#8A5D12;background:#FBF0DC;border-radius:6px;padding:3px 8px}

/* ---------- coverage (dark) ---------- */
.coverage{background:var(--ink);color:#fff;position:relative;overflow:hidden}
.coverage::before{
  content:"";position:absolute;right:-160px;top:-200px;width:720px;height:720px;border-radius:50%;
  background:radial-gradient(circle,rgba(233,163,60,.18),transparent 66%);
}
.cov-grid{position:relative;display:grid;grid-template-columns:.92fr 1.08fr;gap:clamp(30px,5vw,64px);align-items:center}
.cov-grid h2{font-size:clamp(26px,3.4vw,40px);letter-spacing:-.03em}
.cov-grid .lead{margin-top:16px;color:rgba(255,255,255,.55);font-size:15px;line-height:1.75;max-width:420px}
.cov-nums{display:grid;grid-template-columns:repeat(2,1fr);gap:26px 20px;margin-top:34px}
.cov-num b{display:block;font-size:clamp(26px,3vw,34px);font-weight:750;letter-spacing:-.04em;color:var(--gold-hi);font-family:var(--mono)}
.cov-num span{font-size:12.5px;color:rgba(255,255,255,.45)}
.cov-list{display:flex;flex-direction:column;gap:1px;border-radius:16px;overflow:hidden;background:rgba(255,255,255,.07)}
.cov-item{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:16px 20px;background:rgba(255,255,255,.03);
  transition:background .2s ease,padding .2s ease;
}
.cov-item:hover{background:rgba(255,255,255,.07);padding-left:24px}
.cov-item .l{display:flex;align-items:center;gap:12px;min-width:0}
.cov-item .l i{
  width:30px;height:30px;flex:none;border-radius:9px;display:grid;place-items:center;
  background:rgba(233,163,60,.12);color:var(--gold-hi);font-style:normal;font-size:11px;font-weight:800;
}
.cov-item .l b{font-size:14.5px;font-weight:650;display:block}
.cov-item .l span{font-size:11.5px;color:rgba(255,255,255,.4)}
.cov-item .r{font-family:var(--mono);font-size:12.5px;color:rgba(255,255,255,.62);white-space:nowrap}

/* ---------- roles ---------- */
.roles{background:var(--cream)}
.rgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.rcard{
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px 20px;
  transition:transform .28s ease,box-shadow .28s ease;
}
.rcard:hover{transform:translateY(-4px);box-shadow:0 20px 44px -32px rgba(20,22,26,.55)}
.rcard .em{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;margin-bottom:16px;
  background:linear-gradient(160deg,#FFF4E1,#FBE7C6);color:#B37B22;box-shadow:inset 0 1px 0 #fff;
}
.rcard h3{font-size:15.5px;margin-bottom:8px}
.rcard p{font-size:13.4px;color:var(--muted);line-height:1.65}
.rcard ul{list-style:none;margin:14px 0 0;padding:0;display:flex;flex-direction:column;gap:7px}
.rcard li{font-size:12.5px;color:var(--text-2);display:flex;gap:7px;align-items:flex-start}
.rcard li::before{content:"";width:4px;height:4px;border-radius:50%;background:var(--gold);margin-top:8px;flex:none}

/* ---------- download ---------- */
.download{background:var(--ink);color:#fff;position:relative;overflow:hidden}
.download::before{
  content:"";position:absolute;left:50%;top:-30%;width:1000px;height:800px;transform:translateX(-50%);
  background:radial-gradient(ellipse,rgba(233,163,60,.16),transparent 64%);
}
.dl-inner{position:relative;display:grid;grid-template-columns:1fr auto;gap:clamp(28px,5vw,60px);align-items:center}
.dl-inner h2{font-size:clamp(27px,3.6vw,42px);letter-spacing:-.035em}
.dl-inner .lead{margin-top:16px;color:rgba(255,255,255,.55);font-size:15.5px;max-width:480px;line-height:1.75}
.dl-btns{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}
.dl-btn{
  display:inline-flex;align-items:center;gap:11px;height:56px;padding:0 20px;border-radius:13px;
  border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.05);
  transition:background .2s ease,border-color .2s ease,transform .2s ease;
}
.dl-btn:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.3);transform:translateY(-2px)}
.dl-btn .txt{text-align:left}
.dl-btn .txt span{display:block;font-size:10.5px;color:rgba(255,255,255,.45);letter-spacing:.04em}
.dl-btn .txt b{display:block;font-size:14px;font-weight:700;letter-spacing:-.01em}
.dl-qr{text-align:center}
.dl-qr .box{width:170px;height:170px;background:#fff;border-radius:16px;padding:11px;margin-inline:auto;box-shadow:0 30px 60px -30px rgba(0,0,0,.9)}
.dl-qr p{margin-top:14px;font-size:12.5px;color:rgba(255,255,255,.5)}

/* ---------- faq ---------- */
.faq{background:var(--cream)}
.faq-grid{display:grid;grid-template-columns:.82fr 1.18fr;gap:clamp(30px,5vw,64px);align-items:start}
.faq-grid h2{font-size:clamp(26px,3.4vw,38px)}
.faq-grid .lead{margin-top:14px;color:var(--muted);font-size:14.5px;line-height:1.75}
details{border-bottom:1px solid var(--line);padding:2px 0}
details summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:19px 0;font-size:15.5px;font-weight:650;letter-spacing:-.015em;transition:color .2s ease;
}
details summary::-webkit-details-marker{display:none}
details summary:hover{color:#B37B22}
.plus{width:26px;height:26px;border-radius:50%;border:1px solid var(--line);flex:none;position:relative;transition:.3s}
.plus::before,.plus::after{content:"";position:absolute;left:50%;top:50%;background:#5C6470;border-radius:2px;transition:.3s}
.plus::before{width:11px;height:1.5px;transform:translate(-50%,-50%)}
.plus::after{width:1.5px;height:11px;transform:translate(-50%,-50%)}
details[open] .plus{background:var(--ink);border-color:var(--ink);transform:rotate(180deg)}
details[open] .plus::before,details[open] .plus::after{background:#fff}
details[open] .plus::after{transform:translate(-50%,-50%) rotate(90deg)}
details .ans{padding:0 40px 20px 0;color:var(--muted);font-size:14.2px;line-height:1.8;animation:fade .32s ease}
@keyframes fade{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

/* ---------- footer ---------- */
footer{background:#07080A;color:rgba(255,255,255,.5);padding:clamp(44px,6vw,64px) 0 30px;border-top:1px solid rgba(255,255,255,.07)}
.foot-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:32px}
.foot-brand p{margin-top:16px;font-size:13px;max-width:300px;line-height:1.75}
.foot-col h4{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:rgba(255,255,255,.35);font-weight:700;margin-bottom:14px}
.foot-col a{display:block;font-size:13.5px;color:rgba(255,255,255,.62);padding:6px 0;transition:color .2s ease}
.foot-col a:hover{color:var(--gold-hi)}
.foot-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.07);font-size:12px;
}
.foot-bottom .links{display:flex;gap:18px;flex-wrap:wrap}