:root{--amber:#f90;--amber-dim:rgba(255,153,0,.7);--amber-glow:rgba(255,153,0,.25);--ember:#ff6a3d;--electric:#36c5f0;--accent:#f90;--accent-glow:rgba(255,153,0,.25);--surface-0:#0a0c10;--surface-1:#12151c;--surface-2:hsla(0,0%,100%,.04);--surface-3:hsla(0,0%,100%,.07);--surface:hsla(0,0%,100%,.04);--surface-hover:hsla(0,0%,100%,.07);--border:rgba(255,153,0,.12);--border-subtle:hsla(0,0%,100%,.06);--text:hsla(0,0%,100%,.92);--text-dim:hsla(0,0%,100%,.55);--text-mid:hsla(0,0%,100%,.75);--radius:12px}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:DM Sans,Noto Sans TC,sans-serif;background:var(--surface-0);color:var(--text);overflow-x:hidden;line-height:1.7;-webkit-font-smoothing:antialiased}::selection{background:rgba(255,153,0,.3);color:#fff}.page-container{position:relative;z-index:1;max-width:640px;margin:0 auto;padding:0 16px 60px}.form-header{text-align:center;padding:48px 24px 32px;background:linear-gradient(135deg,rgba(255,153,0,.08),var(--surface-1));border-bottom:1px solid var(--border);margin-bottom:0;border-radius:16px 16px 0 0}.header-badge{font-size:12px;color:var(--accent);letter-spacing:2px;margin-bottom:8px}.header-title{font-size:clamp(1.5rem,4vw,2rem);font-weight:900}.header-subtitle{font-size:14px;color:var(--text-dim);margin-top:4px}.registration-form{background:hsla(0,0%,100%,.02);border:1px solid hsla(0,0%,100%,.06);border-top:none;border-radius:0 0 16px 16px}.form-section{padding:24px;border-bottom:1px solid hsla(0,0%,100%,.06)}.section-label{font-size:11px;color:var(--accent);letter-spacing:1.5px;margin-bottom:16px;text-transform:uppercase}.cohort-cards{display:flex;gap:12px}.cohort-card{flex:1;border:1px solid hsla(0,0%,100%,.12);border-radius:10px;padding:16px;cursor:pointer;transition:all .2s}.cohort-card:hover{border-color:rgba(255,153,0,.2);background:rgba(255,153,0,.03)}.cohort-card.selected{border-color:var(--accent);border-width:2px;background:rgba(255,153,0,.05)}.cohort-venue{font-weight:700;font-size:15px;display:flex;align-items:center;gap:8px}.mtr-dot{width:12px;height:12px;border-radius:50%;flex-shrink:0}.cohort-dates{font-size:13px;color:var(--text-dim);margin-top:6px}.cohort-time{font-size:12px;color:hsla(0,0%,100%,.4)}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}.form-field{margin-bottom:10px}.field-label{display:block;font-size:12px;color:hsla(0,0%,100%,.5);margin-bottom:4px}.form-input{width:100%;background:hsla(0,0%,100%,.06);border:1px solid hsla(0,0%,100%,.12);border-radius:6px;padding:10px 12px;font-size:14px;color:var(--text);font-family:inherit;outline:none;transition:border-color .2s}.form-input:focus{border-color:var(--accent)}.form-input::placeholder{color:hsla(0,0%,100%,.25)}.form-textarea{resize:vertical;min-height:60px}.field-error{font-size:12px;color:#ff6b6b;margin-top:4px}.experience-options{display:flex;gap:8px}.experience-btn{flex:1;text-align:center;padding:10px;border:1px solid hsla(0,0%,100%,.12);border-radius:6px;font-size:13px;color:hsla(0,0%,100%,.5);background:transparent;cursor:pointer;font-family:inherit;transition:all .2s}.experience-btn:hover{border-color:rgba(255,153,0,.2)}.experience-btn.selected{border-color:var(--accent);border-width:2px;color:var(--accent);background:rgba(255,153,0,.05)}.promo-toggles{display:flex;gap:8px;margin-bottom:14px}.promo-toggle{flex:1;text-align:center;padding:10px;border:1px solid hsla(0,0%,100%,.12);border-radius:6px;font-size:13px;color:hsla(0,0%,100%,.5);background:transparent;cursor:pointer;font-family:inherit;transition:all .2s}.promo-toggle.active{border-color:var(--accent);border-width:2px;color:var(--accent);background:rgba(255,153,0,.05)}.promo-input-row{display:flex;gap:8px;margin-bottom:8px}.promo-input-row .form-input{flex:1}.validate-btn{background:var(--accent);color:#000;border:none;border-radius:6px;padding:10px 16px;font-weight:600;font-size:14px;cursor:pointer;font-family:inherit;white-space:nowrap}.validate-btn:hover{opacity:.9}.promo-success{font-size:13px;color:#4ecdc4;margin-top:6px}.promo-hint{font-size:11px;color:hsla(0,0%,100%,.3);text-align:center;margin-top:8px}.bni-selector{position:relative}.bni-dropdown{position:absolute;top:100%;left:0;right:0;background:var(--surface-1);border:1px solid hsla(0,0%,100%,.12);border-radius:0 0 6px 6px;max-height:200px;overflow-y:auto;z-index:10}.bni-option{display:block;width:100%;text-align:left;padding:8px 12px;font-size:13px;color:var(--text-dim);background:transparent;border:none;cursor:pointer;font-family:inherit}.bni-option:hover{background:rgba(255,153,0,.1);color:var(--text)}.bni-option.disabled{cursor:default;color:hsla(0,0%,100%,.3)}.price-display{background:rgba(255,153,0,.04);border:1px solid rgba(255,153,0,.15);border-radius:10px;padding:16px;text-align:center;margin-top:14px}.price-label-text{font-size:13px;color:hsla(0,0%,100%,.5)}.price-amount{font-size:28px;font-weight:900;color:var(--accent);margin:4px 0}.price-tier{font-size:12px;color:#4ecdc4;font-weight:600}.price-detail{font-size:12px;color:hsla(0,0%,100%,.4);margin-top:4px}.stripe-card-wrapper{background:hsla(0,0%,100%,.04);border:1px solid hsla(0,0%,100%,.1);border-radius:10px;padding:16px}.stripe-header{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-dim);margin-bottom:12px}.stripe-secured{font-size:11px;color:hsla(0,0%,100%,.3)}.stripe-element{background:hsla(0,0%,100%,.04);border:1px solid hsla(0,0%,100%,.08);border-radius:6px;padding:12px}.terms-section{padding:24px}.terms-label{display:flex;align-items:flex-start;gap:8px;cursor:pointer}.terms-checkbox{width:18px;height:18px;accent-color:var(--accent);flex-shrink:0;margin-top:2px}.terms-label span{font-size:13px;color:var(--text-dim)}.terms-link{color:var(--accent);text-decoration:underline}.submit-btn{display:block;width:calc(100% - 48px);margin:0 24px 24px;background:linear-gradient(135deg,var(--amber),var(--ember));border:none;border-radius:10px;padding:16px;cursor:pointer;transition:opacity .2s}.submit-btn:hover{opacity:.9}.submit-btn:disabled{opacity:.5;cursor:not-allowed}.submit-btn-text{font-size:18px;font-weight:700;color:#fff;font-family:inherit}.submit-btn-sub{font-size:12px;color:hsla(0,0%,100%,.7);margin-top:4px}.submit-error{padding:12px 24px;color:#ff6b6b;font-size:14px;text-align:center}.success-card{text-align:center;padding:48px 24px;background:hsla(0,0%,100%,.03);border:1px solid rgba(255,153,0,.15);border-radius:16px}.success-icon{width:60px;height:60px;border-radius:50%;background:rgba(255,153,0,.1);color:var(--accent);font-size:28px;display:flex;align-items:center;justify-content:center;margin:0 auto 16px}.success-ref{font-size:13px;color:var(--text-dim);margin:8px 0 20px}.success-details{text-align:left;display:inline-block;line-height:2}.success-details,.success-note{font-size:14px;color:var(--text-dim)}.success-note{margin-top:24px}.back-link{display:inline-block;margin-top:20px;color:var(--accent);text-decoration:none;font-size:14px}.back-link:hover{text-decoration:underline}.terms-page{padding-top:48px}.terms-page h1{font-size:24px;margin-bottom:8px}.terms-subtitle{color:var(--text-dim);font-size:14px;margin-bottom:32px}.terms-page section{margin-bottom:24px}.terms-page h2{font-size:16px;color:var(--accent);margin-bottom:8px}.terms-page p{font-size:14px;color:var(--text-dim);line-height:1.8}@media (max-width:480px){.cohort-cards{flex-direction:column}.form-row{grid-template-columns:1fr}.experience-options,.promo-toggles{flex-direction:column}}