*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

  /* ── HERO ── */
  .hero {
    padding: 64px 0 56px;
  }

  .hero__grid {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 48px;
    align-items: center;
  }

  /* Hero card */
  .hero__card {
    border-radius: 0.25rem;
    padding: 28px 28px 20px;
    box-shadow: 0 8px 40px rgba(0,0,0,0.18);
  }

  .hero__card-title {
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--aqua);
    margin-bottom: 16px;
  }

  .steps-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
  }

  .steps-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 13px;
    line-height: 1.4;
  }

  .step-num {
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    background: var(--aqua-light);
    color: var(--aqua);
    font-size: 11px;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 1px;
  }

  .hero__card-note {
    background: var(--bg);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    font-size: 12px;
    color: var(--text-muted);
  }

  /* ── SECTION BASE ── */
  section { padding: 56px 0; }

  .section-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 600;
    color: var(--aqua);
    text-transform: uppercase;
    letter-spacing: 0.07em;
    margin-bottom: 10px;
  }

  h2 {
    font-size: clamp(20px, 2.5vw, 28px);
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: -0.02em;
    margin-bottom: 10px;
  }

  .section-lead {
    font-size: 16px;
    color: var(--text-muted);
    max-width: 600px;
    margin-bottom: 36px;
  }

  /* ── SIGNALS GRID ── */
  .signals-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 14px;
  }

  .signal-card {
    background: #FFFFFF;
    border: 1px solid #E2E8EE;
    border-radius: 0.25rem;
    padding: 18px 20px;
    display: flex;
    gap: 12px;
    align-items: flex-start;
    transition: border-color 0.2s, box-shadow 0.2s;
  }
  .signal-card:hover { border-color: var(--aqua); box-shadow: 0 4px 16px rgba(11,122,138,0.1); }

  .signal-icon {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    background: var(--aqua-light);
    border-radius: 0.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
  }

  .signal-card h3 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
  }

  .signal-card p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.5;
  }

  /* ── FILTER TYPES ── */
  .filters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
  }

  .filter-card {
    background: #FFFFFF;
    border: 1px solid #E2E8EE;
    border-radius: 0.25rem;
    padding: 24px;
    position: relative;
    overflow: hidden;
    transition: border-color 0.2s, transform 0.2s;
  }
  .filter-card:hover { border-color: var(--aqua); transform: translateY(-2px); }
  .filter-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--aqua);
  }

  .filter-card h3 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 10px;
  }

  .filter-card p {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 14px;
    line-height: 1.55;
  }

  .check-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 7px;
  }

  .check-list li {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 13px;
    line-height: 1.4;
  }

  .check-list li::before {
    content: '✓';
    flex-shrink: 0;
    color: var(--aqua);
    font-weight: 700;
    margin-top: 1px;
  }

  /* ── PROCESS STEPS ── */
  .process-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 14px;
  }

  .process-step {
    background: #FFFFFF;
    border: 1px solid #E2E8EE;
    border-radius: 0.25rem;
    padding: 20px;
  }

  .process-num {
    font-size: 11px;
    font-weight: 700;
    color: var(--aqua);
    letter-spacing: 0.06em;
    margin-bottom: 8px;
    display: block;
  }

  .process-step h3 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 6px;
  }

  .process-step p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.5;
  }

  /* ── DIY SECTION ── */
  .diy-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }

  .diy-card {
    background: #FFFFFF;
    border: 1px solid #E2E8EE;
    border-radius: 0.25rem;
    padding: 24px;
  }

  .diy-card.diy-ok { border-top: 3px solid #22A37C; }
  .diy-card.diy-warn { border-top: 3px solid var(--orange); }

  .diy-card h3 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 14px;
  }

  .diy-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  .diy-list li {
    display: flex;
    gap: 10px;
    font-size: 14px;
    line-height: 1.45;
  }

  .diy-list .ico-ok { color: #22A37C; font-weight: 700; flex-shrink: 0; }
  .diy-list .ico-warn { color: var(--orange); font-weight: 700; flex-shrink: 0; }

  /* ── WHY US ── */
  .why-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
  }

  .why-card {
    background: #FFFFFF;
    border: 1px solid #E2E8EE;
    border-radius: 0.25rem;
    padding: 22px 20px;
  }

  .why-num {
    font-size: 28px;
    font-weight: 700;
    color: var(--aqua-mid);
    letter-spacing: -0.03em;
    margin-bottom: 10px;
    line-height: 1;
  }

  .why-card h3 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 8px;
  }

  .why-card p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.55;
  }

  /* ── FAQ ── */
  .faq-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-width: 740px;
  }

  details {
    background: #FFFFFF;
    border: 1px solid #E2E8EE;
    border-radius: 0.25rem;
    overflow: hidden;
    transition: border-color 0.2s;
  }
  details[open] { border-color: var(--aqua); }

  summary {
    padding: 16px 20px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    user-select: none;
  }
  summary::-webkit-details-marker { display: none; }

  .faq-arrow {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--aqua-light);
    color: var(--aqua);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    transition: transform 0.25s;
  }
  details[open] .faq-arrow { transform: rotate(45deg); }

  .faq-answer {
    padding: 0 20px 16px;
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.65;
    border-top: 1px solid #E2E8EE;
    padding-top: 14px;
  }

  /* ── RESPONSIVE ── */
  @media (max-width: 860px) {
    .hero__grid { grid-template-columns: 1fr; }
    .hero__card { max-width: 460px; }
    .diy-grid { grid-template-columns: 1fr; }
    .cta-inner { grid-template-columns: 1fr; }
    .cta-btns { flex-direction: row; }
  }

  @media (max-width: 560px) {
    section { padding: 40px 0; }
    .hero { padding: 44px 0 40px; }
    .process-grid { grid-template-columns: 1fr 1fr; }
    .cta-btns { flex-direction: column; }
  }