/**
 * Case Study & Whitepaper shared styles
 * Used by: page-case-study-nigeria.php, page-whitepaper-fuel-switchable.php
 */

.screen-reader-text {
    clip: rect(1px, 1px, 1px, 1px);
    clip-path: inset(50%);
    height: 1px;
    width: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
    word-wrap: normal;
}

.case-study-page { font-family: 'Inter', -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif; color: var(--color-text); line-height: 1.75; }
#primary { scroll-margin-top: 1rem; }

.case-study-reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.55s cubic-bezier(0.4, 0, 0.2, 1), transform 0.55s cubic-bezier(0.4, 0, 0.2, 1); }
.case-study-reveal.is-visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) { .case-study-reveal { opacity: 1; transform: none; transition: none; } .case-study-reveal.is-visible { opacity: 1; transform: none; } }

.case-study-hero { position: relative; min-height: 480px; display: flex; align-items: center; justify-content: center; overflow: hidden; background-color: #0d2137; background-size: cover; background-position: center; background-repeat: no-repeat; }
.tool-hero-picture { position: absolute; inset: 0; z-index: 0; width: 100%; height: 100%; pointer-events: none; }
.tool-hero-picture img { width: 100%; height: 100%; object-fit: cover; display: block; }
.case-study-hero-overlay { position: absolute; inset: 0; z-index: 1; background: linear-gradient(135deg, rgba(13,33,55,0.45) 0%, rgba(11,42,90,0.35) 55%, rgba(11,42,74,0.48) 100%); pointer-events: none; }
.case-study-hero .container { position: relative; z-index: 2; width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; display: flex; justify-content: center; align-items: center; }
.case-study-hero-inner { max-width: 900px; width: 100%; margin-left: auto; margin-right: auto; text-align: center; color: #fff; }
.case-study-hero .section-label.case-study-badge { display: inline-block; font-size: 0.8rem; font-weight: 600; letter-spacing: 4px; color: rgba(255,255,255,0.9); margin-bottom: 12px; text-transform: uppercase; }
.case-study-hero-divider { width: 100px; height: 4px; background: linear-gradient(90deg, transparent, rgba(255,255,255,0.7), transparent); margin: 0 auto 24px; }
.case-study-title { font-family: 'Montserrat', sans-serif; font-size: clamp(1.5rem, 3.5vw, 2.1rem); font-weight: 700; line-height: 1.35; margin: 0 0 12px; color: #fff; text-shadow: 0 2px 16px rgba(0,0,0,0.35); }
.case-study-subtitle { font-size: 1.05rem; color: rgba(255,255,255,0.9); margin: 0; }
.tool-hero-sub { font-size: 0.95rem; color: rgba(255,255,255,0.85); margin: 8px 0 0; }
.tool-calculator-page .case-study-hero-inner .btn { margin-top: 24px; }

/* Tool page: 浅色背景 + 工具/计算主题图案（网格 + 圆点，清晰可见） */
.tool-calculator-page .case-study-hero.tool-hero { min-height: 56vh; min-height: clamp(420px, 56vh, 580px); }
.tool-calculator-page .case-study-hero.tool-hero-pattern .tool-hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    background-color: #f1f5f9;
    /* 底渐变 */
    background-image:
        linear-gradient(180deg, #f8fafc 0%, #f1f5f9 50%, #e2e8f0 100%);
    background-size: 100% 100%;
    background-position: 0 0;
    pointer-events: none;
}
/* 网格 + 圆点：用伪元素画，确保图案在上层且可见 */
.tool-calculator-page .case-study-hero.tool-hero-pattern .tool-hero-bg::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(11, 99, 214, 0.18) 1px, transparent 1px),
        linear-gradient(90deg, rgba(11, 99, 214, 0.18) 1px, transparent 1px);
    background-size: 24px 24px;
    background-position: 0 0, 0 0;
}
.tool-calculator-page .case-study-hero.tool-hero-pattern .tool-hero-bg::after {
    content: "";
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle, rgba(11, 99, 214, 0.2) 2px, transparent 2px);
    background-size: 24px 24px;
    background-position: 0 0;
}
.tool-calculator-page .case-study-hero.tool-hero-pattern .case-study-hero-overlay {
    background: linear-gradient(180deg, rgba(255,255,255,0.12) 0%, rgba(248,250,252,0.06) 100%);
}
.tool-calculator-page .case-study-hero.tool-hero .case-study-hero-inner { color: #1e293b; }
.tool-calculator-page .case-study-hero.tool-hero .section-label.case-study-badge { color: var(--color-primary); font-weight: 600; }
.tool-calculator-page .case-study-hero.tool-hero .case-study-hero-divider { background: linear-gradient(90deg, transparent, rgba(11, 99, 214, 0.4), transparent); }
.tool-calculator-page .case-study-hero.tool-hero .case-study-title { color: #0f172a; text-shadow: none; }
.tool-calculator-page .case-study-hero.tool-hero .case-study-subtitle { color: #475569; }
.tool-calculator-page .case-study-hero.tool-hero .tool-hero-sub { color: #64748b; }
.tool-calculator-page .case-study-hero-inner { animation: tool-hero-fade-in 0.7s cubic-bezier(0.4, 0, 0.2, 1) forwards; }
@keyframes tool-hero-fade-in { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }
@media (prefers-reduced-motion: reduce) { .tool-calculator-page .case-study-hero-inner { animation: none; } }
.tool-calculator-page .case-study-hero-inner .btn { transition: transform 0.25s ease, box-shadow 0.25s ease; }
.tool-calculator-page .case-study-hero-inner .btn:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(11, 99, 214, 0.35); }
.tool-calculator-page .case-study-hero-inner .btn:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; }
.tool-calculator-placeholder { margin-top: 2rem; }
/* 工具页：区块协调与未来感 */
.tool-calculator-page .case-study-body { padding: 0; }
.tool-calculator-page .case-study-section { padding: clamp(40px, 6vw, 64px) 0; transition: background-color 0.3s ease; }
.tool-calculator-page .case-study-section--alt { background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%); }
.tool-calculator-page .case-study-section-inner { padding: 0 24px; }
.tool-calculator-page .case-study-h2 { letter-spacing: -0.02em; }
.tool-calculator-page .tool-calculator-placeholder { padding: clamp(24px, 4vw, 36px); background: rgba(255,255,255,0.6); -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px); border-radius: 20px; border: 1px solid rgba(11, 99, 214, 0.08); box-shadow: 0 8px 32px rgba(15, 23, 42, 0.06); transition: box-shadow 0.3s ease; }
.tool-calculator-page .tool-calculator-placeholder:focus-within { box-shadow: 0 12px 40px rgba(11, 99, 214, 0.12); }
.tool-calculator-page .tool-calc-summary { border-radius: 16px; transition: border-color 0.25s ease, box-shadow 0.25s ease; }
.tool-calculator-page .tool-calc-summary:hover { border-color: rgba(11, 99, 214, 0.25); box-shadow: 0 4px 20px rgba(11, 99, 214, 0.08); }
.tool-calculator-page .tool-slider-row input[type="range"] { accent-color: var(--color-primary); transition: opacity 0.2s ease; }
.tool-calculator-page .tool-slider-row input[type="range"]:hover { opacity: 1; }
.tool-calculator-page .case-study-cta { border-radius: 0; position: relative; overflow: hidden; }
.tool-calculator-page .case-study-cta::before { content: ""; position: absolute; top: 0; left: 50%; width: 80%; height: 1px; background: linear-gradient(90deg, transparent, rgba(11, 99, 214, 0.25), transparent); transform: translateX(-50%); }
.tool-figure { margin: 0 0 1rem; }
.tool-chart-fallback { max-width: 100%; height: auto; display: block; border-radius: 8px; }
.tool-figure-caption { font-size: 0.95rem; color: var(--color-muted); margin-top: 12px; }
.tool-calc-interactive-wrap { margin-top: 1rem; }
.tool-calc-chart-wrap { max-width: 480px; width: 100%; margin: 0 auto 1.5rem; height: 220px; min-height: 220px; contain: layout; position: relative; }
.tool-calc-chart-wrap canvas { display: block; max-height: 220px; }
.tool-calc-sliders { display: grid; gap: 12px; margin-bottom: 1.25rem; max-width: 400px; margin-left: auto; margin-right: auto; }
.tool-slider-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.tool-slider-row label { min-width: 120px; font-size: 0.9rem; }
.tool-slider-row input[type="range"] { flex: 1; min-width: 120px; }
.tool-slider-val { font-weight: 600; color: var(--color-primary); min-width: 2.5rem; }
.tool-calc-summary { padding: 1rem; background: rgba(11, 99, 214, 0.06); border-radius: 12px; border: 1px solid rgba(11, 99, 214, 0.15); }
.tool-calc-summary p { margin: 0.4rem 0; font-size: 0.95rem; }
.tool-pie-fallback { display: block; margin: 0 auto; max-width: 220px; }
.tool-table-wrap { overflow-x: auto; margin: 1rem 0; }
.tool-materials-table { width: 100%; max-width: 480px; border-collapse: collapse; font-size: 0.95rem; }
.tool-materials-table th, .tool-materials-table td { padding: 10px 14px; text-align: left; border: 1px solid rgba(0,0,0,0.1); }
.tool-materials-table th { background: #f5f7fb; font-weight: 600; }
.tool-materials-table tbody tr:nth-child(even) { background: #fafbfc; }
.wp-cta-form--tool select { width: 100%; padding: 12px 14px; border: 1px solid #ccc; border-radius: 6px; font-size: 1rem; background: #fff; }
.tool-cta-honeypot { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }
.case-study-meta { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 28px; }
.case-study-meta span { background: rgba(255,255,255,0.14); padding: 8px 18px; border-radius: 999px; font-size: 0.85rem; color: rgba(255,255,255,0.95); border: 1px solid rgba(255,255,255,0.2); }

.case-study-stats-strip { padding: 48px 24px; background: #fff; box-shadow: 0 8px 32px rgba(15, 23, 42, 0.08); margin-top: -32px; position: relative; z-index: 3; }
.case-study-stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; max-width: 960px; margin: 0 auto; }
.case-study-stat-item { text-align: center; padding: 28px 20px; background: #fff; border-radius: 16px; border: 1px solid rgba(13, 33, 55, 0.08); box-shadow: 0 8px 28px rgba(15, 23, 42, 0.06); transition: transform 0.28s cubic-bezier(.4,0,.2,1), box-shadow 0.28s ease, border-color 0.28s ease; }
.case-study-stat-item:hover { transform: translateY(-4px); box-shadow: 0 16px 40px rgba(15, 23, 42, 0.1); border-color: rgba(11, 99, 214, 0.2); }
.case-study-stat-value { font-family: 'Montserrat', sans-serif; font-size: 1.9rem; font-weight: 800; color: var(--color-primary); line-height: 1.2; display: block; }
.case-study-stat-value small { font-weight: 600; opacity: 0.9; font-size: 0.85em; }
.case-study-stat-value span { font-size: 0.75em; font-weight: 600; color: var(--color-muted); margin-left: 2px; }
.case-study-stat-label { font-size: 0.8rem; color: var(--color-muted); margin-top: 8px; display: block; text-transform: uppercase; letter-spacing: 0.5px; }

.case-study-body { padding: 0; }
.case-study-section { padding: 56px 0; background: #fff; }
.case-study-section--alt { background: #f5f7fb; }
.case-study-section-inner { max-width: 820px; margin: 0 auto; }
.case-study-section-label { display: block; font-size: 0.8rem; font-weight: 600; letter-spacing: 3px; color: var(--color-primary); margin-bottom: 10px; text-transform: uppercase; }
.case-study-h2 { font-family: 'Montserrat', sans-serif; font-size: 1.4rem; font-weight: 700; color: var(--color-text); margin: 0 0 1.25rem; padding-bottom: 0.6rem; border-bottom: 2px solid rgba(11, 99, 214, 0.2); }
.case-study-section p { margin: 0 0 1rem; color: #444; }
.case-study-lead { font-size: 1.08rem; line-height: 1.8; color: #333; margin-bottom: 1.25rem !important; }
.case-study-h3 { font-family: 'Montserrat', sans-serif; font-size: 1.1rem; font-weight: 600; margin: 1.25rem 0 0.5rem; color: var(--color-text); }
.case-study-list { margin: 0.5rem 0 1rem; padding-left: 1.5rem; }
.case-study-list li { margin-bottom: 0.5rem; color: #444; }

.case-study-flow-steps { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 8px 4px; margin: 1.5rem 0; padding: 20px 24px; background: linear-gradient(90deg, rgba(11, 99, 214, 0.06) 0%, rgba(11, 99, 214, 0.04) 100%); border-radius: 12px; border: 1px solid rgba(11, 99, 214, 0.12); }
.case-study-flow-step { padding: 10px 16px; background: #fff; border-radius: 8px; font-weight: 600; color: var(--color-text); font-size: 0.95rem; box-shadow: 0 2px 8px rgba(0,0,0,0.04); border: 1px solid rgba(13, 33, 55, 0.08); }
.case-study-flow-arrow { color: var(--color-primary); font-weight: 700; font-size: 1rem; opacity: 0.8; }

.case-study-pill-grid { display: flex; flex-wrap: wrap; gap: 10px 12px; margin: 1rem 0 1.5rem; }
.case-study-pill { display: inline-block; padding: 10px 18px; background: #fff; border: 1px solid rgba(13, 33, 55, 0.1); border-radius: 999px; font-size: 0.9rem; color: var(--color-text); box-shadow: 0 2px 10px rgba(15, 23, 42, 0.04); transition: border-color 0.2s ease, box-shadow 0.2s ease; }
.case-study-pill:hover { border-color: rgba(11, 99, 214, 0.3); box-shadow: 0 4px 14px rgba(11, 99, 214, 0.08); }
.case-study-section--alt .case-study-pill { background: #fff; }

.case-study-control-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px 24px; margin-top: 1.5rem; }
.case-study-control-item { display: flex; flex-direction: column; padding: 0; background: #fff; border: 1px solid rgba(13, 33, 55, 0.1); border-radius: 14px; box-shadow: 0 4px 18px rgba(15, 23, 42, 0.05); transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease; overflow: hidden; }
.case-study-section--alt .case-study-control-item { background: #fff; }
.case-study-control-item:hover { border-color: rgba(11, 99, 214, 0.25); box-shadow: 0 8px 28px rgba(15, 23, 42, 0.08); transform: translateY(-2px); }
.case-study-control-head { display: flex; align-items: center; gap: 14px; padding: 18px 22px 14px; border-bottom: 1px solid rgba(13, 33, 55, 0.08); background: linear-gradient(180deg, rgba(11, 99, 214, 0.04) 0%, transparent 100%); }
.case-study-control-num { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; background: var(--color-primary); color: #fff; border-radius: 50%; font-family: 'Montserrat', sans-serif; font-weight: 700; font-size: 1rem; flex-shrink: 0; }
.case-study-control-head .case-study-h3 { margin: 0; font-size: 1.06rem; line-height: 1.35; flex: 1; min-width: 0; }
.case-study-control-body { padding: 16px 22px 20px; }
.case-study-control-body p { margin: 0; font-size: 0.95rem; color: #444; line-height: 1.65; }
.case-study-control-body .case-study-table-wrap { margin: 0 0 12px; }
.case-study-control-body .case-study-table-wrap + p { margin-top: 0; }
.case-study-h3--check { position: relative; padding-left: 1.75rem; }
.case-study-h3--check::before { content: "✓"; position: absolute; left: 0; color: var(--color-primary); font-weight: 700; font-size: 1.1rem; }
.case-study-list--two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 0.35rem 2rem; }

.case-study-result-highlight { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 20px 24px; margin: 1.5rem 0; padding: 24px; background: linear-gradient(90deg, rgba(13, 33, 55, 0.04) 0%, rgba(11, 99, 214, 0.06) 100%); border-radius: 16px; border: 1px solid rgba(11, 99, 214, 0.12); }
.case-study-result-box { text-align: center; padding: 20px 32px; min-width: 140px; border-radius: 12px; background: #fff; box-shadow: 0 4px 16px rgba(15, 23, 42, 0.06); }
.case-study-result-box--before { border: 1px solid rgba(13, 33, 55, 0.1); }
.case-study-result-box--after { border: 2px solid var(--color-primary); background: linear-gradient(180deg, rgba(11, 99, 214, 0.06) 0%, #fff 100%); }
.case-study-result-value { font-family: 'Montserrat', sans-serif; font-size: 1.75rem; font-weight: 800; display: block; line-height: 1.2; }
.case-study-result-box--before .case-study-result-value { color: var(--color-muted); }
.case-study-result-box--after .case-study-result-value { color: var(--color-primary); }
.case-study-result-label { font-size: 0.8rem; color: var(--color-muted); margin-top: 6px; display: block; }
.case-study-result-arrow { font-size: 1.5rem; font-weight: 700; color: var(--color-primary); opacity: 0.8; }

.case-study-roi-card { margin: 1.5rem 0; padding: 32px 36px; background: linear-gradient(135deg, rgba(11, 99, 214, 0.08) 0%, rgba(11, 99, 214, 0.03) 100%); border: 2px solid rgba(11, 99, 214, 0.2); border-radius: 16px; box-shadow: 0 8px 32px rgba(11, 99, 214, 0.1); transition: box-shadow 0.3s ease, border-color 0.3s ease; }
.case-study-roi-card:hover { box-shadow: 0 12px 40px rgba(11, 99, 214, 0.14); border-color: rgba(11, 99, 214, 0.3); }
.case-study-roi-main { display: flex; align-items: baseline; flex-wrap: wrap; gap: 4px 8px; margin-bottom: 12px; }
.case-study-roi-number { font-family: 'Montserrat', sans-serif; font-size: 2.5rem; font-weight: 800; color: var(--color-primary); line-height: 1; }
.case-study-roi-unit { font-size: 1.1rem; color: var(--color-muted); font-weight: 500; }
.case-study-roi-meta { margin-bottom: 12px; }
.case-study-roi-payback { font-size: 0.95rem; color: #444; font-weight: 500; }
.case-study-roi-benefits { font-size: 0.95rem; color: #555; margin: 0; padding-top: 12px; border-top: 1px solid rgba(13, 33, 55, 0.08); }

.case-study-quotes-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 1rem; }
.case-study-quotes-grid .case-study-quote { margin: 0; }
.case-study-quote { margin: 1rem 0; padding: 20px 24px; background: #fff; border: 1px solid rgba(13, 33, 55, 0.08); border-left: 4px solid var(--color-primary); border-radius: 0 12px 12px 0; font-style: italic; color: #555; box-shadow: 0 4px 18px rgba(15, 23, 42, 0.05); }

.case-study-table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 1.25rem 0; border-radius: 12px; border: 1px solid rgba(13, 33, 55, 0.1); box-shadow: 0 4px 20px rgba(15, 23, 42, 0.06); background: #fff; }
.case-study-table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.case-study-table caption { font-weight: 600; color: var(--color-text); text-align: left; padding: 0 0 10px; caption-side: top; }
.case-study-table th, .case-study-table td { padding: 14px 18px; text-align: left; border-bottom: 1px solid #eee; }
.case-study-table th { background: linear-gradient(180deg, rgba(11, 99, 214, 0.06) 0%, rgba(11, 99, 214, 0.02) 100%); font-weight: 600; color: var(--color-text); font-family: 'Montserrat', sans-serif; }
.case-study-table tbody tr:last-child td { border-bottom: none; }
.case-study-table tbody tr:hover { background: rgba(11, 99, 214, 0.03); }

.case-study-flow { background: linear-gradient(90deg, rgba(11, 99, 214, 0.08) 0%, rgba(11, 99, 214, 0.04) 100%); padding: 14px 20px; border-radius: 10px; font-weight: 600; margin: 1rem 0; color: var(--color-text); border-left: 4px solid var(--color-primary); }
.case-study-highlight { background: linear-gradient(90deg, rgba(11, 99, 214, 0.08) 0%, rgba(11, 99, 214, 0.03) 100%); border-left: 4px solid var(--color-primary); padding: 14px 20px; margin: 1rem 0; border-radius: 0 10px 10px 0; font-weight: 500; color: var(--color-text); }
.case-study-footnote { font-size: 0.85rem; color: var(--color-muted); margin-top: 14px; }
.case-study-sources { font-size: 0.9rem; color: var(--color-muted); margin-top: 1rem; font-style: italic; }
.case-study-disclaimer { font-size: 0.85rem; color: var(--color-muted); margin-top: 12px; padding-top: 12px; border-top: 1px solid rgba(13, 33, 55, 0.1); }

.case-study-cta { text-align: center; padding: 72px 24px; background: linear-gradient(160deg, rgba(11, 99, 214, 0.14) 0%, rgba(13, 33, 55, 0.06) 50%, rgba(11, 99, 214, 0.08) 100%); border-top: 2px solid rgba(11, 99, 214, 0.2); box-shadow: 0 -4px 24px rgba(11, 99, 214, 0.06); }
.case-study-cta-inner { max-width: 720px; margin: 0 auto; }
.case-study-cta-title { font-family: 'Montserrat', sans-serif; font-size: 1.5rem; font-weight: 700; margin: 0 0 12px; color: var(--color-text); }
.case-study-cta-desc { margin: 0 0 28px; color: #555; font-size: 1.05rem; }
.case-study-cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-bottom: 16px; }
.case-study-cta-actions .btn { text-decoration: none; padding: 12px 24px; border-radius: 6px; font-weight: 600; font-size: 0.95rem; transition: box-shadow 0.2s ease, transform 0.2s ease; }
.case-study-cta-actions .btn-primary:hover { transform: translateY(-1px); box-shadow: 0 10px 22px rgba(11,99,214,0.2); }
.case-study-cta-actions .btn-outline:hover { transform: translateY(-1px); }
.case-study-cta-actions .btn:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; }
.case-study-cta-note { font-size: 0.875rem; color: var(--color-muted); margin: 0; }

.wp-hero { position: relative; min-height: 520px; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.wp-hero-bg { position: absolute; inset: 0; background: linear-gradient(160deg, #132639 0%, #1a3552 35%, #1e4270 70%, #162d47 100%); }
.wp-hero-grid { position: absolute; inset: 0; background-image: linear-gradient(rgba(11,99,214,0.22) 1px, transparent 1px), linear-gradient(90deg, rgba(11,99,214,0.22) 1px, transparent 1px); background-size: 48px 48px; }
.wp-hero-glow { position: absolute; top: -50%; left: 50%; width: 120%; height: 100%; background: radial-gradient(ellipse at center, rgba(11,99,214,0.15) 0%, transparent 60%); transform: translateX(-50%); pointer-events: none; }
.wp-hero .container { position: relative; z-index: 2; }
.wp-hero-card { max-width: 720px; margin: 0 auto; text-align: center; padding: 48px 40px; background: rgba(255,255,255,0.08); -webkit-backdrop-filter: blur(20px); backdrop-filter: blur(20px); border: 1px solid rgba(255,255,255,0.15); border-radius: 24px; box-shadow: 0 24px 64px rgba(0,0,0,0.25); }
.wp-hero-tags { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 20px; }
.wp-hero-tag { font-size: 0.75rem; font-weight: 600; letter-spacing: 2px; padding: 8px 16px; background: rgba(11,99,214,0.4); color: #fff; border-radius: 999px; border: 1px solid rgba(255,255,255,0.2); }
.wp-hero-title { font-family: 'Montserrat', sans-serif; font-size: clamp(1.4rem, 3.2vw, 2rem); font-weight: 700; line-height: 1.3; margin: 0 0 14px; color: #fff; text-shadow: 0 2px 8px rgba(0,0,0,0.5), 0 0 1px rgba(0,0,0,0.5); }
.wp-hero-subtitle { font-size: 1.1rem; color: #fff; margin: 0; text-shadow: 0 1px 4px rgba(0,0,0,0.45), 0 0 1px rgba(0,0,0,0.4); }
.wp-hero-sub { font-size: 0.95rem; color: rgba(255,255,255,0.95); margin-top: 8px; text-shadow: 0 1px 3px rgba(0,0,0,0.4); }

.wp-cta-form { text-align: left; max-width: 560px; margin: 0 auto 24px; }
.wp-cta-fields { display: grid; grid-template-columns: 1fr 1fr; gap: 16px 20px; margin-bottom: 24px; }
.wp-cta-field label { display: block; font-size: 0.85rem; font-weight: 600; color: var(--color-text); margin-bottom: 6px; }
.wp-cta-field input { width: 100%; padding: 12px 14px; border: 1px solid rgba(13,33,55,0.15); border-radius: 10px; font-size: 0.95rem; background: #fff; }
.wp-cta-field input:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(11,99,214,0.15); }
.wp-cta-field input[aria-invalid="true"] { border-color: #c00; }
.wp-cta-actions .btn { margin: 0 6px; }

.whitepaper-closing { margin-top: 2rem; padding: 28px 24px; background: linear-gradient(135deg, rgba(11, 99, 214, 0.08) 0%, rgba(11, 99, 214, 0.03) 100%); border: 2px solid rgba(11, 99, 214, 0.2); border-radius: 16px; text-align: center; }
.whitepaper-closing-quote { font-family: 'Montserrat', sans-serif; font-size: 1.25rem; font-weight: 700; color: var(--color-primary); margin: 0 0 12px !important; line-height: 1.5; }
.whitepaper-closing-note { font-size: 0.95rem; color: #555; margin: 0 !important; }

.wp-simulator-disclaimer { font-size: 0.85rem; color: var(--color-muted); margin: 0 0 1.5rem; padding: 12px 16px; background: rgba(13, 33, 55, 0.05); border-radius: 10px; border-left: 4px solid rgba(11, 99, 214, 0.3); }
.wp-simulator-controls { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px 24px; margin-bottom: 28px; }
.wp-simulator-control-group { display: flex; flex-direction: column; gap: 6px; }
.wp-simulator-control-group label { font-size: 0.85rem; font-weight: 600; color: var(--color-text); }
.wp-simulator-control-group input[type="range"] { width: 100%; accent-color: var(--color-primary); }
.wp-simulator-control-group input[type="number"] { width: 100%; max-width: 120px; padding: 8px 12px; border: 1px solid rgba(13,33,55,0.15); border-radius: 8px; font-size: 0.95rem; }
.wp-simulator-value { font-size: 0.9rem; color: var(--color-primary); font-weight: 600; }
.wp-simulator-chart-wrap { max-width: 800px; margin: 0 auto 24px; position: relative; height: 280px; }
.wp-simulator-chart-wrap canvas { max-height: 280px; }
.wp-simulator-output { margin-bottom: 28px; padding: 20px 24px; background: linear-gradient(90deg, rgba(11, 99, 214, 0.06) 0%, rgba(11, 99, 214, 0.02) 100%); border-radius: 12px; border: 1px solid rgba(11, 99, 214, 0.15); }
.wp-simulator-summary { margin: 0 0 8px; font-size: 1rem; color: #333; }
.wp-simulator-carbon { margin: 0; font-size: 0.9rem; color: var(--color-muted); }
@media (max-width: 600px) { .wp-simulator-controls { grid-template-columns: 1fr; } .wp-simulator-chart-wrap { height: 240px; } }

@media (max-width: 768px) { .case-study-stats-strip { margin-top: -24px; padding: 32px 16px; } .case-study-stats-grid { grid-template-columns: 1fr; gap: 16px; } .case-study-stat-value { font-size: 1.6rem; } .case-study-section { padding: 40px 0; } .case-study-section-inner { padding: 0 20px; } }
@media (max-width: 700px) { .case-study-flow-steps { flex-direction: column; align-items: stretch; } .case-study-flow-arrow { text-align: center; } .case-study-control-grid { grid-template-columns: 1fr; } }
@media (max-width: 600px) { .case-study-list--two-col { grid-template-columns: 1fr; } .case-study-quotes-grid { grid-template-columns: 1fr; } .case-study-table th, .case-study-table td { padding: 12px 14px; font-size: 0.9rem; } .case-study-cta { padding: 48px 20px; } .case-study-cta-title { font-size: 1.25rem; } .case-study-cta-actions { flex-direction: column; align-items: stretch; gap: 10px; } .case-study-cta-actions .btn { width: 100%; text-align: center; } .wp-cta-fields { grid-template-columns: 1fr; } .wp-hero-card { padding: 32px 24px; } .wp-hero { min-height: 460px; } }
@media (max-width: 480px) { .case-study-hero { min-height: 420px; } .case-study-meta { flex-direction: column; align-items: center; margin-top: 20px; } .case-study-stat-item { padding: 22px 16px; } .case-study-section { padding: 32px 0; } .case-study-h2 { font-size: 1.25rem; } .case-study-cta { padding: 40px 16px; } }
/* 工具页响应式：标题居中、区块协调 */
@media (max-width: 768px) {
    .tool-calculator-page .case-study-hero .container { padding: 0 20px; }
    .tool-calculator-page .case-study-hero-inner { text-align: center; }
    .tool-calculator-page .case-study-title { font-size: clamp(1.35rem, 5vw, 1.75rem); }
    .tool-calculator-page .tool-calculator-placeholder { padding: 20px 16px; border-radius: 16px; }
    .tool-calculator-page .tool-calc-sliders { max-width: 100%; }
    .tool-calculator-page .tool-slider-row { flex-direction: column; align-items: stretch; gap: 6px; }
    .tool-calculator-page .tool-slider-row label { min-width: auto; }
}
@media (max-width: 480px) {
    .tool-calculator-page .case-study-hero.tool-hero { min-height: clamp(380px, 50vh, 480px); }
    .tool-calculator-page .case-study-hero-inner .btn { width: 100%; max-width: 280px; margin-left: auto; margin-right: auto; display: block; text-align: center; }
}