.register-page { max-width: 900px; margin: 32px auto; overflow-x: hidden; }
  .register-page .card { border: none; border-radius: 20px; box-shadow: 0 8px 32px rgba(0,0,0,.1); overflow: hidden; }
  .register-header { background: linear-gradient(135deg, var(--green-900), var(--green-700)); text-align: center; padding: 28px 24px 20px; color: #fff; }
  .register-header img { width: 64px; height: 64px; border-radius: 18px; object-fit: cover; box-shadow: 0 6px 20px rgba(0,0,0,.25); margin-bottom: 10px; }
  .register-header h3 { font-weight: 800; margin-bottom: 2px; }
  .register-header p { opacity: .75; font-size: .9rem; margin-bottom: 0; }
  .register-body { padding: 28px 32px 32px; }
  .register-body .form-floating { margin-bottom: 0; }
  .register-body .form-floating>.form-control { border-radius: 10px; border: 1.5px solid var(--gray-200); height: 56px; padding: 16px 14px 0 44px; font-size: .9rem; background: var(--gray-50); }
  .register-body .form-floating>.form-control:focus { border-color: var(--green-500); background: #fff; box-shadow: 0 0 0 3px rgba(30,132,73,.1); }
  .register-body .form-floating>.form-control.is-invalid { border-color: #dc3545; box-shadow: 0 0 0 3px rgba(220,53,69,.1); }
  .register-body .form-floating>label { padding: 16px 14px 0 44px; font-size: .82rem; color: var(--gray-500); font-weight: 500; }
  .register-body .form-floating>.form-control:focus~label,
  .register-body .form-floating>.form-control:not(:placeholder-shown)~label { opacity: .75; transform: scale(.85) translateY(-.6rem) translateX(.15rem); }
  .register-body .input-icon { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); z-index: 5; color: var(--gray-400); font-size: 1.1rem; pointer-events: none; }
  .register-body .form-floating>.form-control:focus~.input-icon { color: var(--green-500); }
  .register-body .password-hint { font-size: .72rem; color: var(--gray-400); margin-top: 4px; padding-left: 2px; }
  .field-error { font-size: .75rem; color: #dc3545; margin-top: 3px; padding-left: 2px; min-height: 18px; }
  .form-control.is-invalid { border-color: #dc3545 !important; background: #fff !important; }
  .form-control.is-valid { border-color: var(--green-500) !important; background: #fff !important; }

  .section-label {
    font-weight: 700; font-size: .95rem; color: var(--green-700);
    display: flex; align-items: center; gap: 8px;
    margin-bottom: 16px;
  }
  .section-label i { font-size: 1.1rem; }

  .acct-card {
    border: 2px solid var(--gray-200);
    border-radius: 16px;
    padding: 20px 16px;
    text-align: center;
    cursor: pointer;
    transition: all .2s;
    height: 100%;
    background: #fff;
    position: relative;
  }
  .acct-card:hover { border-color: var(--green-400); box-shadow: 0 4px 16px rgba(30,132,73,.08); }
  .acct-card.selected { border-color: var(--green-500); background: var(--green-100); box-shadow: 0 4px 16px rgba(30,132,73,.12); }
  .acct-card .acct-icon { font-size: 2rem; margin-bottom: 8px; display: block; }
  .acct-card .acct-name { font-weight: 700; color: var(--gray-800); font-size: .95rem; }
  .acct-card .acct-desc { font-size: .78rem; color: var(--gray-500); margin-top: 4px; line-height: 1.3; }
  .acct-card input[type="radio"] { display: none; }
  .acct-card .check-badge {
    width: 22px; height: 22px; border-radius: 50%;
    border: 2px solid var(--gray-300);
    display: inline-flex; align-items: center; justify-content: center;
    position: absolute; top: 12px; right: 12px;
    transition: all .2s;
  }
  .acct-card.selected .check-badge { border-color: var(--green-500); background: var(--green-500); }
  .acct-card.selected .check-badge::after { content: '✓'; color: #fff; font-size: .7rem; font-weight: 700; }

  .plan-card-sm {
    border: 2px solid var(--gray-200);
    border-radius: 14px;
    padding: 18px 16px;
    cursor: pointer;
    transition: all .2s;
    height: 100%;
    background: #fff;
    position: relative;
    text-align: center;
  }
  .plan-card-sm:hover { border-color: var(--green-400); }
  .plan-card-sm.selected { border-color: var(--green-500); background: var(--green-50); box-shadow: 0 4px 16px rgba(30,132,73,.1); }
  .plan-card-sm input[type="radio"] { display: none; }
  .plan-card-sm .plan-name-sm { font-weight: 700; color: var(--gray-800); font-size: .9rem; }
  .plan-card-sm .plan-price-sm { font-size: 1.6rem; font-weight: 800; color: var(--green-700); margin: 6px 0 2px; }
  .plan-card-sm .plan-price-sm small { font-size: .75rem; font-weight: 500; color: var(--gray-500); }
  .plan-card-sm .plan-dot {
    width: 18px; height: 18px; border-radius: 50%;
    border: 2px solid var(--gray-300);
    display: inline-flex; align-items: center; justify-content: center;
    margin-bottom: 8px;
    transition: all .2s;
  }
  .plan-card-sm.selected .plan-dot { border-color: var(--green-500); background: var(--green-500); }
  .plan-card-sm.selected .plan-dot::after { content: ''; width: 6px; height: 6px; background: #fff; border-radius: 50%; }
  .plan-card-sm .badge-best {
    position: absolute; top: -10px; left: 50%; transform: translateX(-50%);
    background: var(--green-600); color: #fff; font-size: .62rem; font-weight: 700;
    padding: 2px 12px; border-radius: 20px; white-space: nowrap;
  }
  .plan-card-sm .save-tag {
    display: inline-block;
    background: #e8f8ef; color: var(--green-700);
    font-size: .65rem; font-weight: 600;
    padding: 1px 8px; border-radius: 8px;
    margin-top: 4px;
  }

  @media (max-width: 768px) {
    .register-page { max-width: 100%; margin: 16px; }
    .register-body { padding: 20px 18px 24px; }
    .register-body .form-floating>.form-control { height: 50px; font-size: .85rem; }
    .register-body .form-floating>label { font-size: .78rem; }
    .section-label { font-size: .88rem; margin-bottom: 12px; }
  }

  @media (max-width: 576px) {
    .register-page { margin: 12px; }
    .register-header { padding: 20px 16px 16px; }
    .register-header img { width: 52px; height: 52px; }
    .register-body { padding: 16px 14px 20px; }
    .register-body .form-floating>.form-control { height: 48px; padding: 14px 12px 0 38px; font-size: .82rem; }
    .register-body .form-floating>label { padding: 14px 12px 0 38px; font-size: .75rem; }
    .register-body .input-icon { left: 10px; font-size: .95rem; }
    .register-body .password-hint { font-size: .68rem; }
    .acct-card { padding: 14px 10px; }
    .acct-card .acct-icon { font-size: 1.5rem; }
    .acct-card .acct-name { font-size: .85rem; }
    .acct-card .acct-desc { font-size: .72rem; }
    .plan-card-sm { padding: 14px 10px; }
    .plan-card-sm .plan-price-sm { font-size: 1.3rem; }
    .plan-card-sm .plan-name-sm { font-size: .82rem; }
  }

  @media (max-width: 375px) {
    .register-page { margin: 8px; }
    .register-body { padding: 12px 10px 16px; }
  }

  @media (max-width: 320px) {
    .register-header { padding: 16px 12px 14px; }
    .register-header img { width: 44px; height: 44px; }
    .register-header h3 { font-size: 1.1rem; }
    .register-header p { font-size: .8rem; }
    .register-body { padding: 10px 8px 14px; }
    .register-body .form-floating>.form-control { height: 44px; font-size: .78rem; padding: 12px 10px 0 32px; }
    .register-body .form-floating>label { padding: 12px 10px 0 32px; font-size: .7rem; }
    .register-body .input-icon { left: 8px; font-size: .85rem; }
    .acct-card { padding: 10px 8px; }
    .acct-card .acct-icon { font-size: 1.3rem; margin-bottom: 4px; }
    .acct-card .acct-name { font-size: .78rem; }
    .acct-card .acct-desc { font-size: .65rem; }
    .acct-card .check-badge { width: 18px; height: 18px; top: 6px; right: 6px; }
    .plan-card-sm { padding: 12px 8px; }
    .plan-card-sm .plan-price-sm { font-size: 1.15rem; }
    .plan-card-sm .plan-name-sm { font-size: .76rem; }
    .section-label { font-size: .82rem; margin-bottom: 8px; }
  }