/* MomentumArk 动量方舟 — 品牌站样式 */
:root{
  --bg:#070A0F; --bg2:#0A0F16; --panel:#0E141C; --panel2:#121A24; --panel3:#16202B;
  --line:rgba(255,255,255,.07); --line2:rgba(255,255,255,.13);
  --text:#E9EEF5; --muted:#8C99AB; --dim:#5C697B;
  --gold:#E7B24C; --gold2:#F6D08A; --gold-dim:rgba(231,178,76,.12);
  --up:#F2555A; --down:#22C08A; --warn:#F0A93B;
  --radius:16px; --maxw:1180px;
  --shadow:0 24px 60px -20px rgba(0,0,0,.8);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg); color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:15px; line-height:1.65; -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:""; position:fixed; inset:0; pointer-events:none; z-index:0;
  background:
    radial-gradient(900px 520px at 82% -8%, rgba(231,178,76,.13), transparent 60%),
    radial-gradient(760px 480px at 8% 8%, rgba(34,192,138,.07), transparent 62%);
}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px;position:relative;z-index:1}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}
.mono{font-family:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace}

/* ---------- 头部 ---------- */
.site-head{
  position:sticky; top:0; z-index:60; height:66px;
  background:rgba(7,10,15,.82); backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.head-in{max-width:var(--maxw);margin:0 auto;padding:0 28px;height:100%;display:flex;align-items:center;gap:34px}
.logo{display:flex;align-items:center;gap:10px;flex:none}
.logo svg{width:30px;height:30px}
.logo .word{font-size:15.5px;font-weight:700;letter-spacing:.14em}
.logo .cn{font-size:10.5px;color:var(--muted);letter-spacing:.24em;margin-top:-3px}
.nav{display:flex;gap:26px;margin-left:auto;font-size:13.5px;color:var(--muted)}
.nav a{position:relative;padding:6px 0;transition:color .2s}
.nav a:hover{color:var(--text)}
.nav a.on{color:var(--text)}
.nav a.on::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--gold);border-radius:2px}
.head-cta{display:flex;align-items:center;gap:14px;flex:none}
.link-quiet{font-size:13.5px;color:var(--muted)}
.link-quiet:hover{color:var(--text)}
.burger{display:none;width:36px;height:36px;border:1px solid var(--line2);border-radius:9px;background:none;color:var(--text);cursor:pointer}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:42px;padding:0 20px;border-radius:10px;font-size:14px;font-weight:600;
  border:1px solid transparent;cursor:pointer;transition:.18s ease;white-space:nowrap;
}
.btn-gold{background:linear-gradient(180deg,var(--gold2),var(--gold));color:#1A1206;box-shadow:0 8px 24px -12px rgba(231,178,76,.75)}
.btn-gold:hover{transform:translateY(-1px);box-shadow:0 14px 30px -12px rgba(231,178,76,.85)}
.btn-ghost{background:rgba(255,255,255,.03);border-color:var(--line2);color:var(--text)}
.btn-ghost:hover{background:rgba(255,255,255,.07)}
.btn-sm{height:36px;padding:0 15px;font-size:13px;border-radius:9px}
.btn-block{width:100%}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}

/* ---------- 通用排版 ---------- */
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:11.5px;letter-spacing:.2em;color:var(--gold);text-transform:uppercase}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--gold);opacity:.7}
h1{font-size:clamp(32px,4.4vw,54px);line-height:1.18;letter-spacing:-.015em;font-weight:650}
h2{font-size:clamp(24px,3vw,34px);line-height:1.25;letter-spacing:-.01em;font-weight:640}
h3{font-size:17px;font-weight:640;letter-spacing:.01em}
p.lead{color:var(--muted);font-size:16px;line-height:1.8}
.section{padding:78px 0;position:relative}
.section-head{max-width:660px;margin-bottom:38px}
.section-head h2{margin:14px 0 12px}
.section-head p{color:var(--muted)}
.card{background:linear-gradient(180deg,var(--panel),var(--bg2));border:1px solid var(--line);border-radius:var(--radius)}
.pad{padding:24px}
.hr{height:1px;background:var(--line);margin:22px 0}
.tag{display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 9px;border-radius:6px;font-size:11.5px;color:var(--muted);background:rgba(255,255,255,.045);border:1px solid var(--line)}
.tag.gold{color:var(--gold);background:var(--gold-dim);border-color:rgba(231,178,76,.28)}
.tag.up{color:var(--up);background:rgba(242,85,90,.1);border-color:rgba(242,85,90,.25)}
.tag.down{color:var(--down);background:rgba(34,192,138,.1);border-color:rgba(34,192,138,.25)}
.up-t{color:var(--up)} .down-t{color:var(--down)} .muted{color:var(--muted)} .dim{color:var(--dim)}
.small{font-size:12.5px} .tiny{font-size:11.5px}

/* ---------- Hero ---------- */
.hero{padding:86px 0 54px;position:relative}
.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:56px;align-items:center}
.hero h1{margin:20px 0 20px}
.hero .hl{color:var(--gold)}
.hero p.lead{max-width:520px}
.hero-cta{display:flex;gap:14px;margin:30px 0 26px;flex-wrap:wrap}
.hero-facts{display:flex;gap:26px;flex-wrap:wrap}
.hero-facts div{font-size:12.5px;color:var(--muted);display:flex;align-items:center;gap:7px}
.dot{width:6px;height:6px;border-radius:50%;background:var(--down);box-shadow:0 0 0 4px rgba(34,192,138,.12)}
.panel-chart{padding:22px 22px 14px;box-shadow:var(--shadow);position:relative;overflow:hidden}
.panel-chart::after{content:"";position:absolute;inset:0;pointer-events:none;border-radius:var(--radius);box-shadow:inset 0 1px 0 rgba(255,255,255,.06)}
.pc-head{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:6px}
.pc-kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:14px;padding-top:16px;border-top:1px solid var(--line)}
.pc-kpis b{display:block;font-size:19px;font-weight:640;letter-spacing:-.01em}

/* ---------- 数据条 ---------- */
.strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(10,14,20,.6)}
.strip-in{max-width:var(--maxw);margin:0 auto;padding:22px 28px;display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.strip-in b{display:block;font-size:23px;font-weight:640;letter-spacing:-.01em}
.strip-in span{font-size:11.5px;color:var(--muted);letter-spacing:.04em}

/* ---------- 特性卡 ---------- */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.feat{padding:24px;border-radius:14px;background:linear-gradient(180deg,rgba(255,255,255,.035),rgba(255,255,255,.012));border:1px solid var(--line);transition:.22s}
.feat:hover{transform:translateY(-3px);border-color:var(--line2);background:linear-gradient(180deg,rgba(255,255,255,.055),rgba(255,255,255,.02))}
.feat .ic{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;background:var(--gold-dim);color:var(--gold);margin-bottom:16px;font-size:15px}
.feat h3{margin-bottom:8px}
.feat p{font-size:13.5px;color:var(--muted);line-height:1.75}

/* ---------- 策略卡 ---------- */
.strat-card{padding:24px;display:flex;flex-direction:column;gap:0;transition:.2s;position:relative;overflow:hidden}
.strat-card:hover{border-color:rgba(231,178,76,.32);transform:translateY(-2px)}
.sc-top{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}
.sc-name{font-size:17px;font-weight:640}
.sc-sub{font-size:12.5px;color:var(--muted);margin-top:4px}
.sc-kpis{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:20px 0 16px}
.sc-kpis b{display:block;font-size:16.5px;font-weight:640}
.sc-kpis span{font-size:11px;color:var(--dim)}
.mini-chart{height:86px;margin:2px 0 14px}

/* ---------- 表格 ---------- */
.tbl{width:100%;border-collapse:collapse;font-size:13.5px}
.tbl th{text-align:left;font-weight:500;font-size:11.5px;letter-spacing:.08em;color:var(--dim);text-transform:uppercase;padding:10px 12px;border-bottom:1px solid var(--line)}
.tbl td{padding:12px;border-bottom:1px solid rgba(255,255,255,.045)}
.tbl tr:last-child td{border-bottom:none}
.tbl td.r,.tbl th.r{text-align:right}

/* ---------- 月度热力图 ---------- */
.heat{width:100%;border-collapse:separate;border-spacing:4px;font-size:11.5px}
.heat th{color:var(--dim);font-weight:500;font-size:11px;padding:2px 0;text-align:center}
.heat th.y{text-align:left;padding-left:2px;color:var(--muted)}
.heat td{height:30px;text-align:center;border-radius:5px;color:rgba(255,255,255,.92);font-variant-numeric:tabular-nums;font-size:11px}
.heat td.empty{background:rgba(255,255,255,.02)}

/* ---------- 步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;counter-reset:s}
.step{padding:24px;border-radius:14px;border:1px solid var(--line);background:linear-gradient(180deg,rgba(255,255,255,.03),transparent);position:relative}
.step .n{font-family:ui-monospace,monospace;font-size:12px;color:var(--gold);letter-spacing:.12em;margin-bottom:14px}
.step h3{margin-bottom:8px}
.step p{font-size:13.5px;color:var(--muted)}

/* ---------- 交易所徽标 ---------- */
.ex-row{display:flex;gap:12px;flex-wrap:wrap}
.ex{display:flex;align-items:center;gap:9px;height:44px;padding:0 16px;border:1px solid var(--line);border-radius:10px;background:rgba(255,255,255,.025);font-size:13.5px;color:var(--muted)}
.ex .b{width:9px;height:9px;border-radius:2px;background:var(--gold)}

/* ---------- 表单 ---------- */
.field{margin-bottom:16px}
.field label{display:block;font-size:12.5px;color:var(--muted);margin-bottom:7px}
.input,select.input{width:100%;height:44px;padding:0 13px;border-radius:9px;border:1px solid var(--line2);background:rgba(255,255,255,.03);color:var(--text);font-size:14px;font-family:inherit;outline:none;transition:.18s}
.input:focus{border-color:rgba(231,178,76,.55);background:rgba(231,178,76,.05)}
.input::placeholder{color:var(--dim)}
.hint{font-size:11.5px;color:var(--dim);margin-top:6px}
.check{display:flex;gap:10px;align-items:flex-start;padding:10px 0;font-size:13px;color:var(--muted);cursor:pointer}
.check input{margin-top:3px;accent-color:var(--gold);width:15px;height:15px}
.notice{display:flex;gap:10px;padding:13px 15px;border-radius:10px;font-size:12.5px;line-height:1.7;border:1px solid rgba(240,169,59,.28);background:rgba(240,169,59,.07);color:#E7C68E}
.notice.info{border-color:rgba(231,178,76,.22);background:rgba(231,178,76,.055);color:#D9C39A}
.notice.danger{border-color:rgba(242,85,90,.28);background:rgba(242,85,90,.07);color:#F3B1B4}

/* 向导 */
.wiz{display:grid;grid-template-columns:1.35fr .65fr;gap:22px;align-items:start}
.wiz-steps{display:flex;gap:8px;margin-bottom:22px}
.wiz-steps div{flex:1;font-size:12px;color:var(--dim);padding-top:12px;border-top:2px solid rgba(255,255,255,.08)}
.wiz-steps div.on{color:var(--gold);border-top-color:var(--gold)}
.wiz-steps div.done{color:var(--muted);border-top-color:rgba(231,178,76,.35)}
.wiz-page{display:none}
.wiz-page.on{display:block;animation:fade .28s ease}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.ex-select{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.ex-opt{padding:14px;border:1px solid var(--line);border-radius:11px;cursor:pointer;transition:.16s;background:rgba(255,255,255,.02)}
.ex-opt:hover{border-color:var(--line2)}
.ex-opt.sel{border-color:rgba(231,178,76,.6);background:rgba(231,178,76,.07)}
.ex-opt b{font-size:13.5px;display:block}
.ex-opt span{font-size:11.5px;color:var(--dim)}

/* 面板 */
.dash-kpis{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.kpi{padding:18px 20px;border-radius:13px;border:1px solid var(--line);background:linear-gradient(180deg,rgba(255,255,255,.03),transparent)}
.kpi span{font-size:11.5px;color:var(--muted);letter-spacing:.03em}
.kpi b{display:block;font-size:24px;font-weight:640;margin-top:6px;letter-spacing:-.01em}
.kpi small{font-size:11.5px;color:var(--dim)}
.bar{height:6px;border-radius:99px;background:rgba(255,255,255,.07);overflow:hidden}
.bar i{display:block;height:100%;background:linear-gradient(90deg,var(--gold),var(--gold2))}

/* FAQ */
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{list-style:none;cursor:pointer;padding:22px 0;font-size:15px;font-weight:560;display:flex;justify-content:space-between;gap:20px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--gold);font-weight:400;font-size:20px;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq p{color:var(--muted);font-size:13.5px;padding:0 0 22px;max-width:840px}

/* 页脚 */
footer{border-top:1px solid var(--line);margin-top:60px;padding:50px 0 30px;background:rgba(6,9,13,.7)}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:34px}
.foot-grid h4{font-size:12px;letter-spacing:.12em;color:var(--dim);margin-bottom:14px;text-transform:uppercase;font-weight:500}
.foot-grid a{display:block;font-size:13px;color:var(--muted);padding:5px 0}
.foot-grid a:hover{color:var(--text)}
.foot-bottom{margin-top:36px;padding-top:22px;border-top:1px solid var(--line);font-size:11.5px;color:var(--dim);line-height:1.9;display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}

/* reveal */
.rv{opacity:0;transform:translateY(14px);transition:opacity .65s ease,transform .65s ease}
.rv.in{opacity:1;transform:none}

/* chart tooltip */
.tip{position:absolute;pointer-events:none;padding:7px 10px;border-radius:7px;background:rgba(12,18,26,.96);border:1px solid var(--line2);font-size:11.5px;color:var(--text);white-space:nowrap;transform:translate(-50%,-130%);opacity:0;transition:opacity .12s;z-index:5;box-shadow:0 8px 20px rgba(0,0,0,.5)}

@media (max-width:1000px){
  .hero-grid{grid-template-columns:1fr;gap:38px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3,.steps{grid-template-columns:1fr}
  .strip-in{grid-template-columns:repeat(3,1fr);row-gap:20px}
  .wiz{grid-template-columns:1fr}
  .dash-kpis{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  .nav,.head-cta .link-quiet{display:none}
  .burger{display:grid;place-items:center}
  body.menu-open .nav{display:flex;position:fixed;top:66px;left:0;right:0;flex-direction:column;background:#0A0F16;padding:18px 28px 26px;border-bottom:1px solid var(--line);gap:16px;z-index:59}
  .hero{padding:52px 0 30px}
  .section{padding:54px 0}
  .grid-2{grid-template-columns:1fr}
  .sc-kpis{grid-template-columns:repeat(2,1fr);row-gap:14px}
  .strip-in{grid-template-columns:repeat(2,1fr)}
  .pad{padding:18px}
  .ex-select{grid-template-columns:1fr}
  .tbl{font-size:12px}
  .tbl th,.tbl td{padding:9px 6px}
}