:root {
    --ink: #192033;
    --muted: #667085;
    --line: #e7edf5;
    --paper: #ffffff;
    --soft: #f7f9fc;
    --blue: #2563eb;
    --blue-dark: #0f3f8f;
    --cyan: #e8f3ff;
    --gold: #d8a548;
    --gold-soft: #fff5df;
    --radius: 22px;
    --shadow: 0 18px 45px rgba(15, 35, 75, 0.10);
  }

  * {
    box-sizing: border-box;
  }

  body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: #f8fbff;
    color: var(--ink);
    line-height: 1.72;
  }

  img {
    width: 100%;
    display: block;
    height: auto;
  }

  a {
    color: inherit;
    text-decoration: none;
  }

  .co2-blog {
    overflow: hidden;
    background:
      radial-gradient(circle at 8% 8%, rgba(216, 165, 72, 0.18), transparent 28%),
      radial-gradient(circle at 92% 5%, rgba(37, 99, 235, 0.13), transparent 30%),
      #f8fbff;
  }

  .co2-wrap {
    width: min(1160px, calc(100% - 36px));
    margin: 0 auto;
  }

  .hero {
    padding: 72px 0 54px;
  }

  .hero-grid {
    display: grid;
    grid-template-columns: 1.06fr 0.94fr;
    gap: 46px;
    align-items: center;
  }

  .eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 15px;
    border-radius: 999px;
    background: var(--gold-soft);
    color: #8a5c05;
    font-weight: 800;
    font-size: 14px;
  }

  .eyebrow::before {
    content: "";
    width: 8px;
    height: 8px;
    border-radius: 999px;
    background: var(--gold);
  }

  h1 {
    margin: 22px 0 18px;
    font-size: clamp(36px, 5vw, 62px);
    line-height: 1.06;
    letter-spacing: -1.4px;
    color: var(--ink);
  }

  h1 span {
    color: var(--blue-dark);
  }

  .hero-lead {
    margin: 0;
    max-width: 720px;
    color: var(--muted);
    font-size: 18px;
  }

  .quick-answer {
    margin-top: 28px;
    padding: 24px;
    border-radius: var(--radius);
    background: #ffffff;
    box-shadow: var(--shadow);
    border: 1px solid var(--line);
  }

  .quick-answer strong {
    display: block;
    color: var(--blue-dark);
    font-size: 20px;
    margin-bottom: 8px;
  }

  .quick-answer p {
    margin: 0;
    color: var(--muted);
  }

  .hero-card {
    border-radius: 34px;
    background: linear-gradient(145deg, #ffffff, #edf6ff);
    border: 1px solid rgba(37, 99, 235, 0.14);
    box-shadow: none;
    padding: 18px;
  }

  .image-box {
    position: relative;
    overflow: hidden;
    border-radius: 26px;
    background: linear-gradient(135deg, #eef6ff, #ffffff);
    border: 1px dashed rgba(37, 99, 235, 0.32);
    box-shadow: none;
  }

  .image-box img {
    aspect-ratio: 1200 / 900;
    object-fit: cover;
  }

  .image-note {
    position: absolute;
    left: 16px;
    right: 16px;
    bottom: 16px;
    padding: 13px 15px;
    border-radius: 16px;
    background: rgba(15, 35, 75, 0.84);
    color: #ffffff;
    font-size: 14px;
  }

  .image-note strong {
    display: block;
    margin-bottom: 3px;
  }

  .hero-card img,
  .image-box img {
    box-shadow: none;
    filter: none;
  }

  .image-note:empty {
    display: none;
  }


  .toc {
    margin: 10px auto 0;
    padding: 16px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.78);
    border: 1px solid var(--line);
    box-shadow: 0 10px 26px rgba(15, 35, 75, 0.06);
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
  }

  .toc a {
    padding: 9px 14px;
    border-radius: 999px;
    background: #ffffff;
    color: var(--blue-dark);
    font-size: 14px;
    font-weight: 800;
    border: 1px solid var(--line);
  }

  .section {
    padding: 58px 0;
  }

  .section-title {
    max-width: 820px;
    margin: 0 auto 34px;
    text-align: center;
  }

  .section-title .tag {
    display: inline-block;
    padding: 8px 14px;
    border-radius: 999px;
    background: var(--cyan);
    color: var(--blue-dark);
    font-weight: 800;
    font-size: 14px;
  }

  .section-title h2 {
    margin: 16px 0 12px;
    color: var(--ink);
    font-size: clamp(30px, 4vw, 46px);
    line-height: 1.14;
    letter-spacing: -0.8px;
  }

  .section-title p {
    margin: 0;
    color: var(--muted);
    font-size: 17px;
  }

  .content-grid {
    display: grid;
    grid-template-columns: 0.92fr 1.08fr;
    gap: 28px;
    align-items: start;
  }

  .panel {
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: 0 14px 34px rgba(15, 35, 75, 0.07);
  }

  .panel h3 {
    margin: 0 0 14px;
    color: var(--blue-dark);
    font-size: 26px;
    line-height: 1.22;
  }

  .panel p {
    margin: 0 0 16px;
    color: var(--muted);
  }

  .panel p:last-child {
    margin-bottom: 0;
  }

  .list {
    display: grid;
    gap: 14px;
    margin-top: 20px;
  }

  .list-item {
    padding: 17px;
    border-radius: 18px;
    background: var(--soft);
    border: 1px solid var(--line);
  }

  .list-item strong {
    display: block;
    color: var(--ink);
    margin-bottom: 4px;
  }

  .list-item span {
    color: var(--muted);
    font-size: 15px;
  }

  .timeline {
    display: grid;
    gap: 18px;
  }

  .timeline-step {
    display: grid;
    grid-template-columns: 74px 1fr;
    gap: 18px;
    align-items: start;
    padding: 22px;
    border-radius: 22px;
    background: #ffffff;
    border: 1px solid var(--line);
    box-shadow: 0 12px 28px rgba(15, 35, 75, 0.06);
  }

  .time-badge {
    width: 74px;
    height: 74px;
    border-radius: 24px;
    background: linear-gradient(135deg, var(--blue-dark), var(--blue));
    color: #ffffff;
    display: grid;
    place-items: center;
    text-align: center;
    font-weight: 900;
    line-height: 1.1;
  }

  .timeline-step h3 {
    margin: 0 0 8px;
    color: var(--ink);
    font-size: 22px;
  }

  .timeline-step p {
    margin: 0;
    color: var(--muted);
  }

  .blue-band {
    border-radius: 34px;
    padding: 44px;
    background:
      linear-gradient(135deg, rgba(15, 63, 143, 0.96), rgba(37, 99, 235, 0.90)),
      radial-gradient(circle at 80% 10%, rgba(255,255,255,0.18), transparent 30%);
    color: #ffffff;
    box-shadow: 0 24px 60px rgba(15, 63, 143, 0.24);
  }

  .blue-band h2 {
    margin: 0 0 16px;
    font-size: clamp(30px, 4vw, 46px);
    line-height: 1.13;
  }

  .blue-band p {
    margin: 0 0 26px;
    max-width: 850px;
    color: rgba(255, 255, 255, 0.86);
  }

  .factor-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
  }

  .factor {
    padding: 20px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.18);
  }

  .factor strong {
    display: block;
    margin-bottom: 7px;
    font-size: 18px;
  }

  .factor span {
    display: block;
    color: rgba(255, 255, 255, 0.78);
    font-size: 14px;
  }

  .table-wrap {
    overflow-x: auto;
    border-radius: 24px;
    box-shadow: var(--shadow);
    border: 1px solid var(--line);
  }

  table {
    width: 100%;
    border-collapse: collapse;
    background: #ffffff;
    min-width: 760px;
  }

  th,
  td {
    padding: 18px;
    border-bottom: 1px solid var(--line);
    text-align: left;
    vertical-align: top;
    font-size: 15px;
  }

  th {
    background: #edf6ff;
    color: var(--blue-dark);
    font-weight: 900;
  }

  td {
    color: var(--muted);
  }

  tr:last-child td {
    border-bottom: none;
  }

  .cards-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
  }

  .mini-card {
    background: #ffffff;
    border: 1px solid var(--line);
    border-radius: 24px;
    padding: 26px;
    box-shadow: 0 14px 32px rgba(15, 35, 75, 0.07);
  }

  .mini-icon {
    width: 48px;
    height: 48px;
    border-radius: 16px;
    background: var(--gold-soft);
    color: #8a5c05;
    display: grid;
    place-items: center;
    font-weight: 900;
    margin-bottom: 18px;
  }

  .mini-card h3 {
    margin: 0 0 12px;
    color: var(--ink);
    font-size: 22px;
  }

  .mini-card p {
    margin: 0;
    color: var(--muted);
  }

  .product-link {
    margin-top: 28px;
    padding: 28px;
    border-radius: 28px;
    background: linear-gradient(135deg, #ffffff, #fff7e7);
    border: 1px solid #f2d796;
    box-shadow: 0 14px 36px rgba(138, 92, 5, 0.09);
  }

  .product-link h3 {
    margin: 0 0 10px;
    color: #6d4604;
    font-size: 26px;
  }

  .product-link p {
    margin: 0 0 18px;
    color: var(--muted);
  }

  .product-link a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 13px 22px;
    border-radius: 999px;
    background: var(--blue-dark);
    color: #ffffff;
    font-weight: 900;
  }

  .faq {
    display: grid;
    gap: 14px;
    max-width: 940px;
    margin: 0 auto;
  }

  details {
    background: #ffffff;
    border: 1px solid var(--line);
    border-radius: 20px;
    padding: 21px 24px;
    box-shadow: 0 12px 28px rgba(15, 35, 75, 0.06);
  }

  summary {
    cursor: pointer;
    list-style: none;
    color: var(--ink);
    font-weight: 900;
    font-size: 17px;
  }

  summary::-webkit-details-marker {
    display: none;
  }

  details p {
    margin: 14px 0 0;
    color: var(--muted);
  }

  .final {
    padding: 44px;
    border-radius: 34px;
    background: linear-gradient(135deg, #0f3f8f, #192033);
    color: #ffffff;
    text-align: center;
    box-shadow: 0 24px 60px rgba(15, 35, 75, 0.26);
  }

  .final h2 {
    margin: 0 0 14px;
    font-size: clamp(30px, 4vw, 48px);
    line-height: 1.12;
  }

  .final p {
    margin: 0 auto 24px;
    color: rgba(255,255,255,0.82);
    max-width: 760px;
  }

  .final a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 50px;
    padding: 14px 24px;
    border-radius: 999px;
    background: #ffffff;
    color: var(--blue-dark);
    font-weight: 900;
  }

  @media (max-width: 980px) {
    .hero-grid,
    .content-grid {
      grid-template-columns: 1fr;
    }

    .factor-grid,
    .cards-3 {
      grid-template-columns: repeat(2, 1fr);
    }
  }

  @media (max-width: 640px) {
    .co2-wrap {
      width: min(100% - 26px, 1160px);
    }

    .hero {
      padding: 46px 0 34px;
    }

    h1 {
      font-size: 36px;
    }

    .toc {
      border-radius: 24px;
      justify-content: flex-start;
    }

    .section {
      padding: 42px 0;
    }

    .panel,
    .blue-band,
    .final {
      padding: 24px;
    }

    .factor-grid,
    .cards-3 {
      grid-template-columns: 1fr;
    }

    .timeline-step {
      grid-template-columns: 1fr;
    }

    .image-note {
      position: static;
      border-radius: 0;
      background: #0f3f8f;
    }
  }