:root{font-family:system-ui,-apple-system,"Microsoft JhengHei",sans-serif;color:#183044;background:#f2f5f8;font-size:16px;line-height:1.65}*{box-sizing:border-box}body{margin:0}header{background:#123b55;color:#fff;border-bottom:4px solid #23a5a8}.header-inner{max-width:960px;margin:auto;padding:16px 28px;display:flex;justify-content:space-between;align-items:center;gap:16px}.brand{font-weight:700;letter-spacing:.08em}.badge{font-size:.875rem;background:#fff2d7;color:#704308;padding:3px 12px;border-radius:4px}main{max-width:900px;margin:auto;padding:32px 24px}.intro{margin-bottom:24px}.eyebrow{color:#087476;font-weight:700;letter-spacing:.14em;margin:0 0 8px}h1{font-size:clamp(1.65rem,4vw,2.35rem);line-height:1.4;margin:0;letter-spacing:.02em}.intro>p:last-child{margin:10px 0 0;color:#526777;font-size:1.125rem}.notice{padding:14px 18px;background:#fff7e6;border-left:4px solid 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#aebfc9;border-radius:6px;max-height:300px;overflow:auto}.result{display:block;background:white;color:#183044;border:0;border-radius:0;width:100%;text-align:left;padding:13px 16px;border-bottom:1px solid #e1e8ed;line-height:1.6}.result:hover{background:#edf6f8}.result strong,.result span{display:block}.result span{font-size:.875rem;color:#566a78}.selection{border:1px solid #479399;background:#eef9f8;padding:14px 16px;border-radius:6px;margin-top:10px}.selection strong,.selection span{display:block}.selection span{font-size:.9375rem}.sessions{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.session{display:flex;align-items:flex-start;gap:10px;border:1px solid #b4c3ce;border-radius:7px;padding:16px 12px;cursor:pointer;margin:0}.session input{margin-top:4px}.session:has(input:checked){border:2px solid #13798a;background:#f0f9fa;padding:15px 11px}.session span{display:block;font-weight:400;font-size:.9375rem}.session 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/* Sequential registration: one field per step, touch-friendly across screens. */
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.phone-error{color:#9b2424;font-weight:600;margin:6px 0 12px}input[aria-invalid="true"]{border-color:#bb4242}
