.cs-page { background: #fff; }
.cs-page section { scroll-margin-top: 90px; }
.cs-page .container { max-width: 1200px; }
.cs-hero { background: #f0f4ff; padding: 112px 0 0; }
.cs-breadcrumb { display: flex; flex-wrap: wrap; gap: 10px; color: var(--gray-300); font-size: 0.78rem; margin-bottom: 30px; }
.cs-breadcrumb a:hover { color: var(--accent); text-decoration: underline; }
.cs-intro { display: grid; grid-template-columns: 1.25fr 1fr; gap: 70px; align-items: end; }
.cs-eyebrow { color: var(--accent); text-transform: uppercase; letter-spacing: 0.16em; font-weight: 700; font-size: 0.72rem; }
.cs-intro h1 { font-family: var(--font-display); font-size: clamp(2.2rem, 4.2vw, 3.7rem); line-height: 1.18; letter-spacing: -0.03em; color: var(--gray-100); margin: 18px 0; }
.cs-intro h1 span, .cs-section-heading h2 span { color: var(--accent); }
.cs-intro p { color: var(--gray-300); line-height: 1.8; padding-bottom: 17px; }
.cs-scope { display: inline-block; color: var(--accent-dark); border: 1px solid #cfdbfa; background: #fff; border-radius: 4px; font-size: 0.72rem; padding: 4px 9px; }
.cs-overview { margin: 35px 0 0; border: 1px solid var(--border); border-radius: 10px; background: #fff; overflow: hidden; box-shadow: var(--shadow); }
.cs-overview img { width: 100%; }
.cs-overview figcaption { display: flex; justify-content: space-between; gap: 20px; border-top: 1px solid var(--border); color: var(--gray-300); font-size: 0.72rem; padding: 12px 18px; }
.cs-jumps { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 8px; }
.cs-jumps a { display: flex; gap: 12px; align-items: start; padding: 22px 18px; border-right: 1px solid var(--border); }
.cs-jumps a:first-child { padding-left: 0; }
.cs-jumps a:last-child { border: 0; }
.cs-jumps a:hover strong { color: var(--accent); }
.cs-jumps b { color: var(--accent); font: 700 1.35rem var(--font-display); }
.cs-jumps strong { display: block; color: var(--gray-100); font-size: 0.86rem; }
.cs-jumps small { display: block; color: var(--gray-300); font-size: 0.72rem; margin-top: 4px; }
.cs-main { padding: 76px 0 55px; }
.cs-section-heading { display: flex; justify-content: space-between; gap: 30px; align-items: end; }
.cs-section-heading h2 { color: var(--gray-100); font: 800 clamp(1.7rem, 3vw, 2.4rem)/1.2 var(--font-display); margin-top: 10px; }
.cs-section-heading p { color: var(--gray-300); max-width: 410px; font-size: 0.88rem; }
.cs-story { display: grid; grid-template-columns: 1fr 1.08fr; align-items: center; gap: 60px; padding: 56px 0; border-bottom: 1px solid var(--border); }
.cs-story:nth-of-type(2) .cs-visual { order: 2; }
.cs-visual { border: 1px solid var(--border); border-radius: 9px; background: #f8faff; overflow: hidden; }
.cs-visual img { width: 100%; background: #fff; }
.cs-visual figcaption { color: var(--gray-300); font-size: 0.72rem; padding: 12px 17px; }
.cs-index { display: flex; align-items: center; gap: 14px; color: var(--accent); font: 700 2rem var(--font-display); }
.cs-index span { font: 700 0.69rem var(--font-body); letter-spacing: 0.12em; text-transform: uppercase; }
.cs-copy h3 { font: 800 clamp(1.45rem, 2.3vw, 1.9rem)/1.25 var(--font-display); color: var(--gray-100); margin: 14px 0; }
.cs-copy > p, .cs-decision p { color: var(--gray-300); line-height: 1.8; font-size: 0.91rem; }
.cs-decision { margin-top: 22px; padding: 17px 19px; background: #f0f4ff; border-left: 3px solid var(--accent); border-radius: 0 8px 8px 0; }
.cs-decision strong { display: block; font-size: 0.69rem; color: var(--accent); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 7px; }
.cs-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 20px; }
.cs-pair p { border-top: 1px solid var(--border); padding-top: 10px; color: var(--gray-300); font-size: 0.78rem; }
.cs-pair b { display: block; color: var(--gray-100); margin-bottom: 3px; }
.cs-result { display: grid; grid-template-columns: auto 1fr; gap: 25px; align-items: center; margin-top: 22px; padding: 20px 24px; background: #f0f4ff; border-left: 3px solid var(--accent); border-radius: 0 8px 8px 0; }
.cs-result strong { color: var(--accent); font: 800 clamp(2.5rem, 5vw, 4rem)/1 var(--font-display); white-space: nowrap; }
.cs-result p { color: var(--gray-300); font-size: 0.88rem; line-height: 1.7; }
.cs-technical { background: #f8faff; padding: 60px 0 72px; }
.cs-technical .cs-section-heading { margin-bottom: 24px; }
.cs-technical details { border-top: 1px solid var(--border); }
.cs-technical details:last-of-type { border-bottom: 1px solid var(--border); }
.cs-technical summary { cursor: pointer; list-style: none; padding: 21px 0; display: flex; gap: 18px; align-items: center; color: var(--gray-100); font-weight: 700; }
.cs-technical summary::-webkit-details-marker { display: none; }
.cs-technical summary b { color: var(--accent); font: 700 1rem var(--font-display); }
.cs-technical summary::after { content: '+'; color: var(--accent); font-size: 1.4rem; font-weight: 400; margin-left: auto; }
.cs-technical details[open] summary::after { content: '−'; }
.cs-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 42px; align-items: center; padding: 5px 0 28px 42px; }
.cs-detail p { color: var(--gray-300); font-size: 0.89rem; line-height: 1.8; margin-bottom: 12px; }
.cs-detail p b { color: var(--gray-100); }
.cs-detail img { width: 100%; border-radius: 6px; }
.cs-note { max-width: 890px; color: var(--gray-300); font-size: 0.75rem; line-height: 1.75; margin-top: 25px; }
.cs-related { background: #eaf0ff; padding: 38px 0; }
.cs-related .container { display: flex; justify-content: space-between; gap: 20px; align-items: center; }
.cs-related h2 { font: 800 1.6rem var(--font-display); color: var(--gray-100); margin: 6px 0; }
.cs-related p { font-size: 0.85rem; color: var(--gray-300); }
.cs-related a { flex: none; }
@media (max-width: 760px) {
  .cs-hero { padding-top: 94px; }
  .cs-intro, .cs-story, .cs-detail { grid-template-columns: 1fr; gap: 24px; }
  .cs-intro h1 { font-size: clamp(1.8rem, 8vw, 2.3rem); }
  .cs-intro p { padding: 0; }
  .cs-overview { margin-top: 25px; }
  .cs-overview figcaption { display: block; }
  .cs-overview figcaption span { display: block; }
  .cs-jumps a { flex-direction: column; gap: 4px; padding: 17px 8px; }
  .cs-jumps strong { font-size: 0.74rem; }
  .cs-jumps small { font-size: 0.67rem; }
  .cs-main { padding: 50px 0 30px; }
  .cs-section-heading { display: block; }
  .cs-section-heading p { margin-top: 12px; }
  .cs-story { gap: 25px; padding: 35px 0; }
  .cs-story:nth-of-type(2) .cs-visual { order: 0; }
  .cs-detail { padding-left: 0; gap: 16px; }
  .cs-result { grid-template-columns: 1fr; gap: 12px; }
  .cs-technical { padding: 45px 0; }
  .cs-related .container { display: block; }
  .cs-related a { margin-top: 18px; }
}
@media (prefers-reduced-motion: reduce) { .cs-page, .cs-page * { scroll-behavior: auto; } }