.page-hero {
    min-height: 72vh;
    background:
      linear-gradient(rgba(0,0,0,0.58), rgba(0,0,0,0.58)),
      url('uploads/676d27e585bb78d01eb86247_article20120-20chlorella20.webp') center/cover no-repeat;
    color: var(--paper);
    padding: 160px var(--gutter) 100px;
    display: flex; flex-direction: column; justify-content: flex-end;
    position: relative;
  }
  .page-hero-inner { max-width: var(--container); margin: 0 auto; width: 100%; position: relative; }
  .page-hero h1 { font-size: clamp(52px, 8vw, 112px); font-weight: 300; letter-spacing: -0.045em; line-height: 0.9; margin-bottom: 40px; }
  .page-hero h1 em { font-style: normal; color: var(--algae); }

  /* Process steps */
  .science-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--line);
  }
  .science-step {
    background: var(--paper);
    padding: 48px 36px;
    position: relative;
  }
  .science-step .num {
    font-family: var(--font-mono); font-size: 11px;
    letter-spacing: 0.12em; color: var(--leaf);
    margin-bottom: 24px; display: block;
    text-transform: uppercase;
  }
  .science-step .icon {
    width: 56px; height: 56px;
    background: var(--mist); border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: var(--leaf); margin-bottom: 24px;
  }
  .science-step h3 { font-size: 18px; font-weight: 500; letter-spacing: -0.02em; margin-bottom: 12px; }
  .science-step p { font-size: 14px; color: var(--muted); line-height: 1.65; }

  /* Data table */
  .data-table {
    width: 100%;
    border-collapse: collapse;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    overflow: hidden;
    font-size: 14px;
  }
  .data-table th {
    background: var(--ink); color: var(--paper);
    padding: 16px 24px; text-align: left;
    font-family: var(--font-mono); font-size: 11px;
    letter-spacing: 0.08em; text-transform: uppercase;
    font-weight: 400;
  }
  .data-table td {
    padding: 16px 24px;
    border-bottom: 1px solid var(--line);
    line-height: 1.5;
  }
  .data-table tr:last-child td { border-bottom: none; }
  .data-table tr:nth-child(even) td { background: var(--cream); }
  .data-table .val { font-weight: 600; color: var(--leaf); font-family: var(--font-mono); }

  /* Polluants */
  .pollutant-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2px;
    background: var(--line);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    overflow: hidden;
  }
  .pollutant-card {
    background: var(--paper);
    padding: 40px 40px;
    display: grid;
    grid-template-columns: 56px 1fr;
    gap: 24px;
    align-items: start;
  }
  .pollutant-icon {
    width: 56px; height: 56px;
    background: var(--mist); border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: var(--leaf); font-family: var(--font-mono); font-size: 13px; font-weight: 500;
    flex-shrink: 0;
  }
  .pollutant-card h3 { font-size: 18px; font-weight: 500; letter-spacing: -0.02em; margin-bottom: 6px; }
  .pollutant-card .reduction { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.06em; color: var(--leaf); margin-bottom: 10px; }
  .pollutant-card p { font-size: 14px; color: var(--muted); line-height: 1.6; }

  /* Chlorella fact strip */
  .fact-strip {
    background: var(--ink); color: var(--paper);
    border-radius: var(--radius-lg);
    padding: 56px;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 2px;
    text-align: center;
  }
  .fact-item { padding: 0 32px; border-right: 1px solid rgba(255,255,255,0.1); }
  .fact-item:last-child { border-right: none; }
  .fact-num { font-size: clamp(40px, 5vw, 64px); font-weight: 300; letter-spacing: -0.04em; color: var(--algae); line-height: 1; margin-bottom: 8px; }
  .fact-label { font-size: 13px; opacity: 0.65; line-height: 1.4; }

  @media (max-width: 1024px) { .science-steps { grid-template-columns: repeat(2, 1fr); } }
  @media (max-width: 880px) {
    .pollutant-grid { grid-template-columns: 1fr; }
    .fact-strip { grid-template-columns: 1fr; gap: 32px; }
    .fact-item { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.1); padding-bottom: 32px; }
    .fact-item:last-child { border-bottom: none; padding-bottom: 0; }
  }
  @media (max-width: 640px) {
    .science-steps { grid-template-columns: 1fr; }
    .pollutant-card { grid-template-columns: 1fr; gap: 12px; }
  }