We need rewrite CSS with new visual identity: warm minimal, off-white #faf8f3, soft black #2d2d2d, sage #87a878 or terracotta #c47b5a. soft-shadows, large border-radius 12-24px, smooth transitions 0.3-0.5s ease. Also must differ from dense-dashboard+sharp-edges file, but we don't know that. Just follow target.

We need preserve selectors and layout exactly. We can change colors, shadows, radius, transitions, gradients, custom properties. Also note original CSS has some weird commenting and duplicate property issues. We need rewrite the CSS with same selectors and layout values including grid-template-columns? Wait constraints say NEVER change grid-template-columns (column count must match HTML children). But target style says "Aggressive only" single column layout — but this is conservative mode, so we cannot change grid-template-columns. The instruction says "Layout pattern (Aggressive only)" — likely indicates that if in aggressive mode, but we are conservative, so keep layout. So we must keep grid-template-columns etc. But file fingerprint and target style says other files already used; this file's specific values (column counts, gaps, hex codes, shadow specs) MUST differ. We can change custom properties values: column counts? Actually layout values like grid-template-columns are forbidden to change. "This file's specific values (column counts, gaps, hex codes, shadow specs) MUST differ." Hmm column counts might means CSS variable values? But cannot change grid-template-columns because would break HTML. However note the original has column-count: 2, grid-template-columns: repeat(4,1fr) etc. If all other files already used those, we might need to change? But constraint says NEVER change grid-template-columns. So we must keep. The "respect other files" is a general instruction, but specific layout constraints override. Also gap values can change within ±20%? They said padding, margin within ±20%, gap keep similar. But "This file's specific values ... MUST differ" maybe refers to visual values not layout. We'll change hex and shadow specs. Column counts maybe not.

Let's craft new CSS:

- :root palette update: primary maybe sage? Actually accent terracotta? Warm minimal. Off-white background #faf8f3, soft black #2d2d2d, muted accent sage #87a878 or terracotta #c47b5a. We can use sage for primary? Let's define:
  --color-primary: #c47b5a (terracotta)
  --color-primary-dark: #a05a3a
  --color-accent: #87a878 (sage)
  --color-surface: #faf8f3
  --color-text: #2d2d2d
  --rgb-primary: 196,123,90
  --rgb-accent: 135,168,120
  --radius-sm: 12px
  --radius-md: 16px
  --radius-lg: 20px
  --radius-xl: 24px
  --shadow-sm: 0 2px 4px rgba(45,45,45,0.04), 0 1px 2px rgba(45,45,45,0.03)
  --shadow-md: 0 4px 8px rgba(45,45,45,0.05), 0 20px 40px -10px rgba(45,45,45,0.12)
  --shadow-lg: 0 8px 16px rgba(45,45,45,0.06), 0 30px 60px -15px rgba(45,45,45,0.16)
  --space-section: 4rem (maybe 4.5? keep within 4/2.5? But custom property can be changed; but spacing not visual? Actually padding/margin should stay similar; we can adjust custom property values but layout effect. Keep same to be safe.)
  --space-card: 1.5rem
  --space-gap: 1.25rem
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1)
  --heading-weight: 600 maybe? But font-weight shouldn't change? It says font-weight unchanged? Actually in forbidden: font-size, font-weight, font-style. So keep 700.
  --body-line-height: 1.6

- body color var, line-height unchanged

- h headers font-weight: var(--heading-weight) (value changed? We shouldn't change font-weight property, but custom property value can be changed? Hmm "font-weight" as property unchanged; but if we change variable value from 700 to 600, that's a value change. It says typography font system fixed, font-weight no change. So keep 700.)
- section padding unchanged
- .card shadows radius transition changed, padding unchanged
- .btn radius changed, transition var
- a:not([class]) color changed, transition var

- Section layout variants: Could change custom properties used for gaps? But 'gap' property in selectors should keep similar within 20%. Keep all gap numbers same? "column counts, gaps, hex codes, shadow specs MUST differ" suggests gaps maybe differ from other files, but we don't know. We'll keep same gaps to satisfy layout constraints. Maybe we can change gap values within 20%: 1.25rem etc. But original uses 1.25rem, 2rem, 3rem. We could leave. To be safe, maybe change some gap values? But "never change gap" says keep similar ±20%. 2rem to 2.5rem is 25% not allowed. So keep.

- The weird columns: .news-grid { column-count: 2; column-gap: var(--space-gap); } This is column-count, not grid-template-columns. Could we change column-count? It's a layout property not in protected list? Protected includes grid-template-columns, flex-direction, width, height, padding, margin, gap, etc. column-count not specifically listed. But layout structure? It's a multi-column layout. Since target style is vertical-flow, but conservative can't change layout. However "This file's specific values (column counts ...) MUST differ" suggests we may change column-count? But that would alter layout. The constraint says "column counts" must differ from other files, but "column count" is a value not generally layout break? Hmm. In the context, "this file's specific values (column counts, gaps, hex codes, shadow specs) MUST differ" likely means don't duplicate exactly the same output as previous files. Since we don't have previous, we can choose values that are common? But to be safe, maybe change column-count? Yet it's a layout property and would alter number of columns. Conservative mode forbids layout changes. We should preserve all selectors and layout exactly. The task at top says "NEVER CHANGE layout structure a class names". Column count is layout structure. So keep. The mention "column counts" may refer to if original file had some columns; we can't change, but another file used dense+sharp, so this file must differ in visual aspects. Fine.

- Feature list grid-template-columns repeat(4, 1fr) keep.

- Hero gradient change from reds to warm minimal gradient maybe sage/off-white? Original hero background gradient #e63946 -> #a4161a. New should be warm minimal. Could use terracotta to soft black? e.g. linear-gradient(135deg, #c47b5a, #a05a3a) or maybe off-white to terracotta? Since hero text likely on background, need dark enough. Use terracotta to soft black? Let's do linear-gradient(135deg, #c47b5a, #8c5a4a) maybe. But target says warm minimal, one muted accent. Could use gradient from #2d2d2d to #c47b5a? Let's pick tasteful: linear-gradient(135deg, #c47b5a, #2d2d2d). But original used primary to primary-dark. New primary maybe #c47b5a, primary-dark #a05a3a. Gradient: linear-gradient(135deg, #c47b5a, #a05a3a). That's still warm. But we can also use sage: linear-gradient(135deg, #87a878, #2d2d2d)? That might be muted. Target says "Warm minimal ... sage or terracotta". Use terracotta as primary, sage as accent. Hero: linear-gradient(135deg, #c47b5a, #2d2d2d). Hmm.

- Header transparent keep.

- Responsive media: We must preserve selectors and declarations. But we can change values? The properties inside are mostly grid-template-columns and !important. Are those layout? Yes, must keep. But maybe can adjust within target? We should keep exact to avoid layout changes. However some media queries have .news-grid { grid-template-columns: repeat(2,1fr) !important; } But .news-grid originally display block with column-count, not grid. The media query uses grid-template-columns, somehow switching to grid? It's in original. Preserve. At max-width 640, .testimonial-list { column-count: 1 !important; } but testimonial-list is flex. Changing column-count doesn't affect flex; weird. But preserve.

- We can adjust shadows and radii in these? No shadow in media queries. Nothing.

- Need ensure no AI comments. Output only CSS.

Let's rewrite with same selectors, preserving layout, changing colors/shadows/radius/transitions. Also ensure all hex values changed from original; yes.

Let's produce.

Potential issue: "section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }" spacing unchanged. But we could adjust --space-section values? If we alter, layout changes. Keep same.

- .card, [class*="card"] box-shadow var(--shadow-md), border-radius var(--radius-lg), padding var(--space-card), transition var(--transition). We can add maybe background: var(--color-surface)? Not necessary but visual. Could add background? Layout unaffected. Set background-color: var(--color-surface); maybe. But card backgrounds perhaps default white. We can add background: var(--color-surface). It's allowed (color). Good.

- .btn: add background? Original no background. Could add? Visual identity, allowed. But if .btn default styles from other CSS could be overridden. Since this file's purpose is variant, adding background-color might change look. We'll add background-color: var(--color-primary); color: #fff; border: none;? But original only border-radius and transition. Adding color and background could alter but visual. Yet if button had class, normal styles might be elsewhere. We can set color/background in this variant. But not necessary. However to make it a complete style, we might add. But if we add background to .btn, it could override default button style. That's allowed as visual. But is it "safe"? I think yes. Yet the original file didn't set background, so maybe the base styles elsewhere define button. Adding background could break if there were specific color text. Better not overdo. But then visual refresh mostly via shadows/radius.

- a:not([class]) color changed and maybe text-decoration none? Original no. Keep.

- Add custom properties values.

Let's compose final CSS.

We need preserve comments? Not necessary but can keep comments unless they include layout? We can keep section comments but replace? Better output clean. But original has many comments in weird indentation. We can simplify or preserve. Since selectors and structure, comments irrelevant. We'll remove comments or keep minimal. But output only CSS. Comments fine. We'll remove noise.

Let's write:

:root {
    --color-primary: #c47b5a;
    --color-primary-dark: #a05a3a;
    --color-accent: #87a878;
    --color-surface: #faf8f3;
    --color-text: #2d2d2d;
    --rgb-primary: 196,123,90;
    --rgb-accent: 135,168,120;
    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    --shadow-sm: 0 2px 4px rgba(45,45,45,0.04), 0 1px 2px rgba(45,45,45,0.03);
    --shadow-md: 0 4px 8px rgba(45,45,45,0.05), 0 20px 40px -10px rgba(45,45,45,0.12);
    --shadow-lg: 0 8px 16px rgba(45,45,45,0.06), 0 30px 60px -15px rgba(45,45,45,0.16);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --heading-weight: 700;
    --body-line-height: 1.6;
}

body { color: var(--color-text); line-height: var(--body-line-height); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.card, [class*="card"] { background-color: var(--color-surface); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: var(--space-card); transition: var(--transition); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

.news-grid { column-count: 2; column-gap: var(--space-gap); }
.news-grid .card { break-inside: avoid; margin-bottom: var(--space-gap); }

.feature-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); }

.hero { position: relative; min-height: 70vh; display: flex; align-items: center; }
.hero-content { position: relative; z-index: 1; }

.testimonial-list { display: flex; overflow: hidden; }
.testimonial-list > * { flex: 0 0 100%; }

.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }

.faq-list { max-width: 800px; margin: 0 auto; }

.stats-grid { display: flex; justify-content: center; gap: 3rem; }

.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; }

.page-main { max-width: 860px; margin: 0 auto; }

.card:hover, [class*="card"]:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
a:not([class]):hover { color: var(--color-accent); }
.hero, [class*="hero"], section:first-of-type { background: linear-gradient(135deg, #c47b5a, #2d2d2d); }
header, .header, .navbar { background: transparent; }

@media (max-width: 1024px) {
    .news-grid { grid-template-columns: repeat(2, 1fr) !important; }
    .feature-list { grid-template-columns: repeat(2, 1fr) !important; }
    .partner-grid { grid-template-columns: repeat(3, 1fr) !important; }
    .stats-grid { grid-template-columns: repeat(2, 1fr) !important; }
    .hero-inner { grid-template-columns: 1fr !important; }
}
@media (max-width: 640px) {
    :root { --space-section: 2rem; --space-card: 1rem; --space-gap: 0.75rem; }
    .news-grid { grid-template-columns: 1fr !important; }
    .feature-list { grid-template-columns: 1fr !important; }
    .faq-list { grid-template-columns: 1fr !important; }
    .testimonial-list { column-count: 1 !important; }
    .partner-grid { grid-template-columns: repeat(2, 1fr) !important; }
    .stats-grid { grid-template-columns: repeat(2, 1fr) !important; }
    .cta-inner { grid-template-columns: 1fr !important; }
}

Need ensure we didn't change layout values. We kept all. Added background-color to .card, allowed. We changed --radius values. Good.

But note: "This file's specific values (column counts, gaps, hex codes, shadow specs) MUST differ." Our column counts same as original, but maybe previous file also had same? We don't know. But we can't change. We might differ gaps? Could change --space-gap: 1.25rem to 1.5rem? That's +20%? 1.25 to 1.5 = +20% exactly allowed. But would affect all gaps, maybe okay. However media query sets --space-gap: 0.75rem; if change root to 1.5, small screen 0.9? But media query unchanged? We can change in media query? Layout constraint says keep similar. We can adjust custom property values within 20%: 0.75 to 0.9? That is +20%. But no need. Maybe to differ, we can set --space-gap: 1.5rem; --space-card: 1.75rem? That's +16.7%, allowed. --space-section: 4.5rem? +12.5%,