:root{--ink:#10172a;--ink-soft:#48526b;--line:#e6e9f0;--bg:#f7f8fb;--card:#fff;--brand:#1657d8;--brand-d:#0f3fa6;--up:#d23b3b;--down:#1a9d63;--gold:#b8862f;--radius:14px;--shadow:0 1px 2px rgba(16,23,42,.04),0 8px 24px rgba(16,23,42,.06)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}.wrap{max-width:1080px;margin:0 auto;padding:0 20px}.muted{color:var(--ink-soft)}.up{color:var(--up)}.down{color:var(--down)}header{position:sticky;top:0;background:#f7f8fbd9;backdrop-filter:blur(10px);border-bottom:1px solid var(--line);z-index:10}.nav{display:flex;align-items:center;gap:24px;height:62px}.logo{font-weight:800;letter-spacing:.5px;font-size:18px}.logo b{color:var(--brand)}.nav nav{display:flex;gap:20px;font-size:14.5px}.nav nav a:hover{color:var(--brand)}.nav .spacer{flex:1}.btn{display:inline-block;padding:9px 16px;border-radius:10px;font-size:14px;font-weight:600;border:1px solid transparent;cursor:pointer}.btn-primary{background:var(--brand);color:#fff}.btn-primary:hover{background:var(--brand-d)}.btn-ghost{border-color:var(--line);background:var(--card)}.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}@media (max-width:760px){.nav nav{display:none}}.hero{padding:64px 0 40px}.hero h1{font-size:40px;line-height:1.2;margin:0 0 16px;letter-spacing:-.5px}.hero h1 em{font-style:normal;color:var(--brand)}.hero p{font-size:18px;max-width:640px;margin:0 0 28px}.hero .cta{display:flex;gap:12px;flex-wrap:wrap}.hero .btn{padding:13px 22px;font-size:15.5px}.badge{display:inline-flex;align-items:center;gap:7px;font-size:13px;color:var(--ink-soft);background:var(--card);border:1px solid var(--line);padding:5px 12px;border-radius:999px;margin-bottom:20px}.dot{width:7px;height:7px;border-radius:50%;background:var(--down)}@media (max-width:760px){.hero h1{font-size:30px}.hero p{font-size:16px}}.strip{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:8px 0}.vcard{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px}.vcard h3{margin:0 0 6px;font-size:16px}.vcard p{margin:0;font-size:14px;color:var(--ink-soft)}.vcard .k{font-size:12px;font-weight:700;color:var(--brand);letter-spacing:.5px}@media (max-width:760px){.strip{grid-template-columns:1fr}}section{padding:44px 0}.sec-h{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:18px}.sec-h h2{font-size:24px;margin:0}.sec-h a{font-size:14px;color:var(--brand);font-weight:600}.dash{display:grid;grid-template-columns:1.2fr 1fr;gap:16px}.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}.demo-tag{font-size:11px;color:var(--gold);border:1px solid #ecdcb8;background:#fdf8ee;padding:2px 8px;border-radius:6px;font-weight:700}table{width:100%;border-collapse:collapse;font-size:14px;margin-top:12px}th,td{text-align:right;padding:8px 6px;border-bottom:1px solid var(--line)}th:first-child,td:first-child{text-align:left}th{color:var(--ink-soft);font-weight:600;font-size:12.5px}.iv-row{display:flex;align-items:center;justify-content:space-between;padding:10px 0;border-bottom:1px solid var(--line)}.iv-row:last-child{border-bottom:0}.bar{height:8px;border-radius:4px;background:linear-gradient(90deg,#1a9d63,#e2c14d,#d23b3b)}.bar-wrap{flex:1;margin:0 14px;background:var(--line);border-radius:4px;position:relative;height:8px}.bar-fill{position:absolute;top:-1px;width:10px;height:10px;border-radius:50%;background:#10172a;border:2px solid #fff;box-shadow:0 0 0 1px var(--line)}.note{font-size:12px;color:#9aa3b8;margin-top:14px}@media (max-width:760px){.dash{grid-template-columns:1fr}}.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.fcard{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;display:flex;flex-direction:column}.fcard .lvl{font-size:12px;font-weight:700;letter-spacing:.5px;color:var(--brand);margin-bottom:8px}.fcard h3{margin:0 0 8px;font-size:18px}.fcard p{margin:0 0 16px;font-size:14px;color:var(--ink-soft);flex:1}@media (max-width:760px){.grid3{grid-template-columns:1fr}}.feature{background:linear-gradient(135deg,#10172a,#1e2b4d);color:#fff;border-radius:18px;padding:40px;display:grid;grid-template-columns:1.3fr 1fr;gap:30px;align-items:center}.feature h2{font-size:26px;margin:0 0 12px}.feature p{color:#c3ccdf;margin:0 0 20px;font-size:15px}.feature .btn-primary{background:#fff;color:var(--brand)}.feature ul{margin:0;padding:0;list-style:none;font-size:14px}.feature li{padding:9px 0;border-bottom:1px solid rgba(255,255,255,.12);display:flex;justify-content:space-between}.feature li b{color:#fff}.feature li span{color:#8fa0c4}@media (max-width:760px){.feature{grid-template-columns:1fr;padding:28px}}.feed-head{display:flex;justify-content:space-between;align-items:center;font-size:13px;color:var(--ink-soft)}.feed{margin-top:10px;font-size:13.5px}.feed table{margin:0}.feed th,.feed td{padding:7px 6px}.pill{display:inline-block;padding:2px 9px;border-radius:6px;font-size:12px;font-weight:600}.p-buy{background:#fdeaea;color:#d23b3b}.p-sell{background:#e7f6ee;color:#1a9d63}.feed tbody tr{animation:flash .6s ease}@keyframes flash{0%{background:#fff6e8}to{background:transparent}}.lead .row{display:flex;align-items:center;gap:10px;padding:9px 0;border-bottom:1px solid var(--line);font-size:14px}.lead .row:last-child{border-bottom:0}.rk{width:22px;height:22px;border-radius:6px;display:grid;place-items:center;font-size:12px;font-weight:800;color:#fff;background:#aab2c5}.rk.g1{background:#e0a92e}.rk.g2{background:#9aa3b8}.rk.g3{background:#c08457}.lead .nm{flex:1}.lead .pl{font-weight:700}.dist{margin-top:14px;background:#fff8f7;border:1px solid #f3d6d3;border-radius:10px;padding:12px;font-size:13px;color:#7a2c28}.wm{font-size:11px;color:#9aa3b8;margin-top:10px}footer{border-top:1px solid var(--line);margin-top:30px;padding:30px 0 50px;font-size:13px;color:var(--ink-soft)}.risk{background:#fff8f7;border:1px solid #f3d6d3;border-radius:12px;padding:16px;margin-bottom:20px;font-size:13px;color:#7a2c28}.article{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:40px;margin:30px 0;box-shadow:var(--shadow)}.article h1{font-size:32px;line-height:1.25;margin:0 0 8px}.article h2{font-size:22px;margin:32px 0 10px}.article h3{font-size:17px;margin:22px 0 8px}.article p,.article li{font-size:16px;color:#26304a}.article blockquote{margin:18px 0;padding:12px 18px;border-left:3px solid var(--brand);background:#f4f7ff;border-radius:0 8px 8px 0;color:#37415c}.article table{font-size:14px}.article a{color:var(--brand);font-weight:600}.tldr{background:#f4f7ff;border:1px solid #d8e2fb;border-radius:10px;padding:16px 18px;margin:18px 0;font-size:15.5px}.breadcrumb{font-size:13px;color:var(--ink-soft);margin-bottom:14px}.breadcrumb a{color:var(--brand)}@media (max-width:760px){.article{padding:24px}.article h1{font-size:26px}}.calc{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start}.field{margin-bottom:14px}.field label{display:block;font-size:13px;color:var(--ink-soft);margin-bottom:6px;font-weight:600}.field input,.field select{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:8px;font-size:15px;font-family:inherit;background:#fff;color:var(--ink)}.field input:focus,.field select:focus{outline:none;border-color:var(--brand)}.result-big{font-size:34px;font-weight:800;color:var(--ink);letter-spacing:-.5px;font-variant-numeric:tabular-nums}.result-cap{font-size:13px;color:var(--ink-soft);margin-top:2px}.bd{margin-top:16px;font-size:14px}.bd .r{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px solid var(--line)}.bd .r:last-child{border-bottom:0;font-weight:700}.bd .r b{font-variant-numeric:tabular-nums}.formula{background:#f4f7ff;border:1px solid #d8e2fb;border-radius:8px;padding:12px 14px;font-size:13px;color:#37415c;margin-top:14px;line-height:1.8}.formula code{background:#fff;border:1px solid #d8e2fb;border-radius:4px;padding:1px 5px;font-size:12.5px}.adv{margin-top:6px;font-size:13px}.adv summary{cursor:pointer;color:var(--brand);font-weight:600;padding:6px 0}.adv .two{display:grid;grid-template-columns:1fr 1fr;gap:12px}.warn{background:#fff8f7;border:1px solid #f3d6d3;border-radius:8px;padding:12px 14px;font-size:12.5px;color:#7a2c28;margin-top:14px;line-height:1.6}@media (max-width:760px){.calc{grid-template-columns:1fr}}.chart-wrap canvas{width:100%;height:auto;display:block;border:1px solid var(--line);border-radius:8px;background:#fff}.legend{display:flex;gap:18px;margin-top:10px;font-size:12.5px;color:var(--ink-soft);flex-wrap:wrap}.legend i{display:inline-block;width:16px;height:3px;border-radius:2px;vertical-align:middle;margin-right:6px}.readout{margin-top:14px;display:grid;grid-template-columns:1fr 1fr;gap:10px}.ro{background:#f7f8fb;border:1px solid var(--line);border-radius:8px;padding:10px 12px}.ro .lbl{font-size:12px;color:var(--ink-soft)}.ro .val{font-size:21px;font-weight:800;font-variant-numeric:tabular-nums;margin-top:2px}.ro .sub{font-size:11.5px;color:#9aa3b8;margin-top:2px}.quiz-bar{position:sticky;top:62px;background:#f7f8fbeb;backdrop-filter:blur(8px);padding:12px 16px;z-index:5;display:flex;justify-content:space-between;align-items:center;border:1px solid var(--line);border-radius:10px;margin-bottom:16px}.quiz-bar .score{font-size:18px;font-weight:800}.quiz-bar .score b{color:var(--brand)}.quiz-q{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;margin-bottom:14px}.quiz-q .cat{font-size:11px;font-weight:700;color:var(--brand);letter-spacing:.5px}.quiz-q .qt{font-size:16px;font-weight:600;margin:6px 0 12px}.opt{display:block;width:100%;text-align:left;padding:11px 14px;border:1px solid var(--line);border-radius:9px;background:#fff;margin-bottom:8px;cursor:pointer;font-size:14.5px;font-family:inherit;color:var(--ink)}.opt:hover{border-color:var(--brand)}.opt.correct{background:#e7f6ee;border-color:#1a9d63;color:#11643f}.opt.wrong{background:#fdeaea;border-color:#d23b3b;color:#9a2620}.opt.disabled{cursor:default}.opt.disabled:hover{border-color:var(--line)}.opt.correct.disabled:hover{border-color:#1a9d63}.explain{display:none;margin-top:6px;padding:11px 14px;background:#f4f7ff;border:1px solid #d8e2fb;border-radius:9px;font-size:13.5px;color:#37415c;line-height:1.7}.explain.show{display:block}.payoff-wrap canvas.payoff{width:100%;height:auto;display:block;border:1px solid var(--line);border-radius:8px;background:#fff}.strat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.strat-card{display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px}.strat-card:hover{border-color:var(--brand)}.strat-card h3{margin:6px 0;font-size:17px}.strat-card p{margin:0;font-size:13.5px;color:var(--ink-soft)}.cat-tag{display:inline-block;font-size:11px;font-weight:700;letter-spacing:.5px;padding:2px 9px;border-radius:6px;background:#eef3ff;color:var(--brand)}.cat-看涨{background:#fdeaea;color:#d23b3b}.cat-看跌{background:#e7f6ee;color:#1a9d63}.cat-看波动{background:#fff3e0;color:#b8862f}.cat-对冲{background:#eef3ff;color:var(--brand)}.strat-meta{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:16px 0}.strat-meta .m{background:#f7f8fb;border:1px solid var(--line);border-radius:8px;padding:10px 12px}.strat-meta .m .k{font-size:12px;color:var(--ink-soft)}.strat-meta .m .v{font-size:14px;font-weight:600;margin-top:3px}@media (max-width:760px){.strat-grid,.strat-meta{grid-template-columns:1fr}}
