.tab-nav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  border-bottom: 2px solid var(--border);
  margin-bottom: 56px;
  padding-bottom: 0;
}

.tab-btn {
  padding: 12px 20px;
  border: none;
  background: none;
  font-size: 16px;
  font-weight: 500;
  color: var(--muted);
  cursor: pointer;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: all 0.2s;
  border-radius: 8px 8px 0 0;
}

.tab-btn:hover { color: var(--text); background: var(--bg-alt); }
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }

.tab-pane { display: none; }
.tab-pane.active { display: block; }

.step-list { display: flex; flex-direction: column; gap: 0; }

.step-item {
  display: flex;
  gap: 32px;
  padding-bottom: 48px;
  position: relative;
}

.step-item::before {
  content: '';
  position: absolute;
  left: 23px;
  top: 48px;
  bottom: 0;
  width: 2px;
  background: var(--border);
}

.step-item:last-child::before { display: none; }

.step-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.step-body h3 { font-size: 20px; font-weight: 600; margin-bottom: 10px; padding-top: 10px; }
.step-body p { color: var(--muted); line-height: 1.75; }

.sub-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }

.sub-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 28px;
  transition: all 0.2s;
}

.sub-card:hover { box-shadow: var(--sh); border-color: var(--accent); }

.sub-card-head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 16px;
}

.sub-icon { font-size: 28px; flex-shrink: 0; }
.sub-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.sub-card p { color: var(--muted); font-size: 15px; line-height: 1.7; }

.sub-highlight {
  font-size: 22px;
  font-weight: 700;
  color: var(--green);
  display: block;
  margin-bottom: 4px;
}

.faq-list { display: flex; flex-direction: column; gap: 12px; }

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--surface);
  overflow: hidden;
  transition: box-shadow 0.2s;
}

.faq-item:hover { box-shadow: var(--sh); }

.faq-q {
  width: 100%;
  background: none;
  border: none;
  padding: 22px 24px;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.faq-q::after {
  content: '+';
  font-size: 22px;
  font-weight: 400;
  color: var(--muted);
  flex-shrink: 0;
  transition: transform 0.3s;
}

.faq-item.open .faq-q::after { content: '−'; }

.faq-a {
  display: none;
  padding: 0 24px 22px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
  border-top: 1px solid var(--border);
  padding-top: 18px;
}

.faq-item.open .faq-a { display: block; }

.bb-card {
  background: var(--dark-gradient);
  border-radius: var(--r);
  padding: 56px;
  color: var(--text);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.bb-card .sec-tag { color: var(--accent); }
.bb-card h2 { color: var(--text); }
.bb-card p { color: var(--muted); line-height: 1.75; margin-bottom: 16px; }

.bb-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 24px;
}

.bbf {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  font-size: 14px;
  color: var(--muted);
}

.bbf::before {
  content: '✓';
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

.bb-form {
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(77, 149, 168, 0.2);
  border-radius: var(--r-sm);
  padding: 28px;
}

.form-row { margin-bottom: 16px; }

.bb-form .form-row label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.bb-form .form-row input,
.bb-form .form-row textarea,
.bb-form .form-row select {
  width: 100%;
  padding: 12px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
}

.bb-form .form-row input::placeholder,
.bb-form .form-row textarea::placeholder { color: var(--muted); }

.form-row textarea { height: 100px; resize: vertical; }

.form-sub {
  width: 100%;
  padding: 13px;
  border-radius: 10px;
  background: #fff;
  color: var(--accent);
  font-size: 15px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  margin-top: 4px;
}

.form-sub:hover { background: var(--accent-light); }

.info-nav {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 48px;
}

.info-nav-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
}

.info-nav-card:hover,
.info-nav-card.active {
  border-color: var(--accent);
  background: var(--accent-light);
}

.info-nav-card.active .inc-title { color: var(--accent); }

.inc-emoji { font-size: 28px; margin-bottom: 8px; }
.inc-title { font-size: 14px; font-weight: 600; color: var(--text); }

.cta-box {
  background: var(--bg-alt);
  padding: 60px 24px;
  text-align: center;
}

.cta-box h2 { max-width: 560px; margin: 0 auto 20px; }
.cta-box p { color: var(--muted); max-width: 460px; margin: 0 auto 40px; font-size: 18px; }

@media (max-width: 1024px) {
  .info-nav { grid-template-columns: repeat(2, 1fr); }
  .sub-grid { grid-template-columns: 1fr; }
  .bb-card { grid-template-columns: 1fr; gap: 32px; padding: 36px 28px; }
  .bb-features { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .tab-nav { gap: 4px; }
  .tab-btn { font-size: 14px; padding: 10px 14px; }
}

@media (max-width: 480px) {
  .info-nav { grid-template-columns: 1fr 1fr; }
}