:root{--p:#211a13;--a:#c7973e;--paper:#f4efe5;--ink:#0e0b08;--card:#fff;--muted:#5b6470;--line:color-mix(in srgb,var(--p) 18%,transparent);--r:22px;--shadow:0 16px 45px color-mix(in srgb, #211a13 14%, transparent);font-family:"Noto Sans TC",system-ui,sans-serif;color:var(--ink);background:var(--paper)}html[data-mode=dark]{--paper:#0e0b08;--ink:#f6f3ed;--card:color-mix(in srgb,#0e0b08 84%,#fff);--muted:#c3c7ce;--line:#ffffff24}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);line-height:1.75}a{color:var(--p);text-decoration:none}html[data-mode=dark] a{color:var(--a)}a:focus-visible,button:focus-visible{outline:3px solid var(--a);outline-offset:3px}.top{position:sticky;top:0;z-index:20;display:flex;gap:24px;align-items:center;justify-content:space-between;padding:14px max(20px,calc((100% - 1360px)/2));background:color-mix(in srgb,var(--paper) 92%,transparent);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}.brand{font-weight:900;font-size:20px;color:var(--ink)}.top nav{display:flex;gap:18px;align-items:center}.top button{border:1px solid var(--line);background:var(--card);color:var(--ink);padding:8px 12px;border-radius:999px}.page{max-width:1360px;margin:auto;padding:30px 20px}.grid{display:grid;grid-template-columns:230px minmax(0,1fr) 280px;gap:24px}.rail{position:sticky;top:90px;align-self:start}.panel,.card,.article article{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow)}.panel{padding:18px;margin-bottom:18px}.panel h2{font-size:15px;text-transform:uppercase;letter-spacing:.08em}.panel a{display:block;padding:7px 0;border-bottom:1px solid var(--line)}.hero-home{padding:34px;min-height:430px;display:grid;align-content:end;background:linear-gradient(135deg,color-mix(in srgb,var(--p) 93%,#000),color-mix(in srgb,var(--p) 35%,var(--ink)));color:#fff;border-radius:var(--r);position:relative;overflow:hidden}.hero-home:after{content:"";position:absolute;width:320px;height:320px;border:42px solid color-mix(in srgb,var(--a) 55%,transparent);border-radius:50%;right:-90px;top:-110px;transform:rotate(33deg)}.hero-home>*{position:relative;z-index:1}.hero-home h1{font-size:clamp(32px,5vw,66px);line-height:1.1;margin:.25em 0}.eyebrow{color:var(--a);font-weight:900;letter-spacing:.08em}.feed,.card-grid{display:grid;gap:18px;margin-top:22px}.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.card{overflow:hidden}.card img{width:100%;aspect-ratio:16/9;object-fit:cover}.card-body{padding:18px}.card h2,.card h3{line-height:1.3;margin:.35em 0}.card p{color:var(--muted)}.tag{display:inline-block;padding:3px 9px;border-radius:999px;background:color-mix(in srgb,var(--a) 22%,transparent);font-size:13px;font-weight:800}.progress{height:8px;border-radius:99px;background:var(--line);overflow:hidden}.progress span{display:block;height:100%;background:var(--a)}.article{max-width:960px;margin:auto}.article article{padding:clamp(22px,5vw,64px)}.crumb{margin-bottom:20px}.article-head h1{font-size:clamp(32px,5vw,58px);line-height:1.18;margin:.25em 0}.dek{font-size:20px;color:var(--muted)}.meta{display:flex;gap:14px;flex-wrap:wrap;font-size:14px}.hero,.wave-focus img{width:100%;height:auto;margin:28px 0;border-radius:calc(var(--r)*.75)}figure{margin:28px 0}figcaption{color:var(--muted);font-size:14px}.answer,.note,.wave-focus{padding:22px;border-left:5px solid var(--a);background:color-mix(in srgb,var(--a) 12%,var(--card));margin:24px 0}.toc{display:grid;gap:8px;padding:20px;border:1px solid var(--line);border-radius:var(--r)}h2{margin-top:1.8em;line-height:1.25}h3{line-height:1.3}.table-wrap{overflow-x:auto}table{border-collapse:collapse;width:100%;min-width:620px}th,td{padding:12px;text-align:left;border:1px solid var(--line);vertical-align:top}blockquote{margin:24px 0;padding:18px 22px;background:color-mix(in srgb,var(--p) 8%,var(--card));border-left:5px solid var(--p)}.mistakes{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.mistakes span{padding:10px;border:1px solid var(--line);border-radius:var(--r)}details{border-bottom:1px solid var(--line);padding:14px 0}summary{font-weight:800;cursor:pointer}.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.related{padding:14px;border:1px solid var(--line);border-radius:var(--r)}footer{max-width:1360px;margin:40px auto 0;padding:30px 20px;border-top:1px solid var(--line)}footer nav{display:flex;gap:18px}.ad[hidden]{display:none}.mobile-tabs{display:none}@media(max-width:1050px){.grid{grid-template-columns:190px minmax(0,1fr)}.right{display:none}}@media(max-width:760px){.top{position:static;display:block}.top nav{overflow-x:auto;margin-top:10px}.top nav a{white-space:nowrap}.grid{display:block}.left{display:none}.page{padding:14px}.hero-home{min-height:350px;padding:24px}.card-grid{grid-template-columns:1fr}.article article{padding:22px}.mistakes{grid-template-columns:repeat(2,1fr)}.related-grid{grid-template-columns:1fr}.meta{display:grid;gap:4px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
/* Intercept CTA wave 4: reference-inspired typography, color and motion. */
.reg-cta{--cta-gold:#ffd642;--cta-gold-hi:#fff3a2;--cta-night:#080b14;position:relative;isolation:isolate;overflow:hidden;margin:28px 0;padding:clamp(24px,4vw,44px);border:1px solid color-mix(in srgb,var(--cta-gold) 52%,transparent);border-radius:max(18px,var(--r));background:radial-gradient(circle at 12% 0%,color-mix(in srgb,var(--p) 62%,transparent),transparent 42%),linear-gradient(135deg,#101829 0%,var(--cta-night) 58%,#181208 100%);color:#fffaf0;box-shadow:0 26px 70px rgba(0,0,0,.3);animation:regCtaRise .58s cubic-bezier(.2,.75,.2,1) both}
.reg-cta--hero{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(230px,.75fr);align-items:center;gap:clamp(22px,4vw,56px)}
.reg-cta--end{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:28px}
.reg-cta__glow{position:absolute;z-index:-1;width:260px;height:260px;right:-80px;top:-110px;border:38px solid rgba(255,214,66,.2);border-radius:50%;filter:drop-shadow(0 0 28px rgba(255,214,66,.2));animation:regCtaFloat 5.6s ease-in-out infinite}
.reg-cta__eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--cta-gold);font-size:13px;font-weight:900;letter-spacing:.09em}
.reg-cta h2{max-width:850px;margin:10px 0 12px;color:#fffaf0;font-size:clamp(30px,4vw,44px);font-weight:950;line-height:1.14;letter-spacing:-.025em;text-wrap:balance}
.reg-cta--end h2{font-size:clamp(26px,3.2vw,38px)}
.reg-cta p{max-width:760px;margin:0;color:rgba(255,250,240,.8);font-size:clamp(16px,1.45vw,18px);line-height:1.7}
.reg-cta__benefits{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:22px}
.reg-cta__benefits span{display:grid;gap:1px;padding:12px 14px;border:1px solid rgba(255,214,66,.28);border-radius:12px;background:rgba(255,255,255,.055);font-size:13px;font-weight:800}
.reg-cta__benefits b{color:var(--cta-gold);font-size:16px;font-weight:950}
.reg-cta__chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.reg-cta__chips span{padding:5px 11px;border:1px solid rgba(255,214,66,.32);border-radius:999px;background:rgba(255,214,66,.09);color:#fff3c0;font-size:12px;font-weight:850}
.reg-cta__steps{margin-top:18px;color:rgba(255,250,240,.86);font-size:14px}
.reg-cta__steps summary{width:max-content;max-width:100%;padding:7px 12px;border-radius:999px;background:rgba(255,255,255,.07);color:#fff3c0;font-weight:850;cursor:pointer;transition:background .18s ease,transform .18s ease}
.reg-cta__steps summary:hover{background:rgba(255,214,66,.15);transform:translateY(-1px)}
.reg-cta__steps ol{margin:12px 0 0;padding-left:22px}
.reg-cta__actions{display:grid;gap:10px;min-width:min(100%,250px)}
.reg-cta__button{position:relative;overflow:hidden;display:inline-flex;align-items:center;justify-content:center;min-height:54px;padding:0 22px;border-radius:999px;background:linear-gradient(180deg,var(--cta-gold-hi),var(--cta-gold));color:#080704!important;font-size:17px;font-weight:950;line-height:1;text-align:center;text-decoration:none;box-shadow:0 18px 42px rgba(255,214,66,.3);transition:transform .18s ease,filter .18s ease,box-shadow .18s ease}
.reg-cta__button:after{content:"";position:absolute;inset:-30% auto -30% -50%;width:35%;transform:skewX(-18deg);background:linear-gradient(90deg,transparent,rgba(255,255,255,.7),transparent);animation:regCtaShine 4.2s ease-in-out infinite}
.reg-cta__button:hover,.reg-cta__button:focus-visible{transform:translateY(-3px) scale(1.015);filter:saturate(1.12);box-shadow:0 22px 50px rgba(255,214,66,.42)}
.reg-cta__button:active{transform:translateY(1px) scale(.99)}
.reg-cta__button--secondary{border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.08);color:#fffaf0!important;box-shadow:none;backdrop-filter:blur(8px)}
.reg-cta__button--secondary:after{display:none}
.reg-cta__button--secondary:hover,.reg-cta__button--secondary:focus-visible{background:rgba(255,255,255,.14);box-shadow:0 16px 32px rgba(0,0,0,.22)}
.reg-cta__actions small{max-width:300px;color:rgba(255,250,240,.58);font-size:11px;line-height:1.45;text-align:center}
@keyframes regCtaRise{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:translateY(0)}}
@keyframes regCtaFloat{0%,100%{transform:translate3d(0,0,0) rotate(0)}50%{transform:translate3d(-14px,12px,0) rotate(8deg)}}
@keyframes regCtaShine{0%,72%{left:-55%;opacity:0}78%{opacity:1}100%{left:125%;opacity:0}}
@media(max-width:760px){.reg-cta{margin:22px 0;padding:22px 18px}.reg-cta--hero,.reg-cta--end{grid-template-columns:1fr;gap:22px}.reg-cta h2,.reg-cta--end h2{font-size:clamp(27px,9vw,36px)}.reg-cta p{font-size:16px}.reg-cta__benefits{grid-template-columns:1fr}.reg-cta__benefits span{grid-template-columns:34px 1fr;align-items:center}.reg-cta__actions{width:100%;min-width:0}.reg-cta__button{width:100%;min-height:52px;font-size:16px}.reg-cta__actions small{max-width:none}.reg-cta__glow{width:180px;height:180px}}
@media(prefers-reduced-motion:reduce){.reg-cta,.reg-cta__glow,.reg-cta__button:after{animation:none!important}.reg-cta__button,.reg-cta__steps summary{transition:none!important}}