/* ===== iwarm 选购指南页样式 ===== */
.guide-hero { position: relative; overflow: hidden; background: linear-gradient(135deg, #1A1A2E 0%, #0F3460 100%); background-size: cover; background-position: center; min-height: 70vh; display: flex; align-items: center; justify-content: center; padding: 80px 24px; text-align: center; color: #fff; }
.guide-hero::before { content: ''; position: absolute; top: -50%; right: -20%; width: 600px; height: 600px; background: radial-gradient(circle, rgba(156,200,41,0.15) 0%, transparent 70%); border-radius: 50%; }
.guide-hero-content { position: relative; z-index: 2; max-width: 700px; margin: 0 auto; }
.guide-hero h1 { font-size: clamp(28px, 4vw, 42px); font-weight: 800; margin-bottom: 16px; }
.guide-hero h1 span { color: var(--primary); }
.guide-hero p { font-size: 1.1rem; color: rgba(255,255,255,0.7); margin-bottom: 32px; }
.guide-hero-stats { display: flex; justify-content: center; gap: 48px; flex-wrap: wrap; margin-top: 32px; }
.guide-hero-stat { text-align: center; }
.guide-hero-stat-value { font-family: "Outfit", sans-serif; font-size: 2rem; font-weight: 700; color: var(--primary); }
.guide-hero-stat-label { font-size: 0.85rem; color: rgba(255,255,255,0.5); margin-top: 4px; }
.power-calculator { background: var(--bg-white); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 32px; max-width: 600px; margin: 48px auto 48px; position: relative; z-index: 3; box-shadow: var(--shadow-lg); }
.power-calculator h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 20px; text-align: center; }
.calc-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.calc-group label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 6px; color: var(--text-dark); }
.calc-group input, .calc-group select { width: 100%; padding: 10px 14px; border: 1px solid var(--border); border-radius: 8px; font-size: 0.95rem; font-family: inherit; }
.calc-result { background: var(--bg-warm); border-radius: var(--radius); padding: 20px; text-align: center; margin-top: 16px; display: none; }
.calc-result.show { display: block; }
.calc-result .result-value { font-family: "Outfit", sans-serif; font-size: 2.5rem; font-weight: 800; color: var(--primary); }
.calc-result .result-label { font-size: 0.9rem; color: var(--text-mid); margin-top: 4px; }
.calc-result .result-hint { font-size: 0.8rem; color: var(--text-light); margin-top: 8px; }
.calc-btn { width: 100%; padding: 12px; background: var(--primary); color: #fff; border: none; border-radius: 8px; font-size: 1rem; font-weight: 600; cursor: pointer; }
.calc-btn:hover { background: var(--primary-dark); }
.section-header { text-align: center; margin-bottom: 48px; }
.section-header .label { display: inline-block; background: var(--bg-warm); color: var(--primary); padding: 6px 16px; border-radius: 50px; font-size: 0.8rem; font-weight: 600; margin-bottom: 12px; }
.section-header h2 { font-size: clamp(22px, 3vw, 32px); font-weight: 800; color: var(--text-dark); margin-bottom: 8px; }
.section-header p { font-size: 1.05rem; color: var(--text-mid); max-width: 600px; margin: 0 auto; }
.guide-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-bottom: 48px; }
.guide-card { background: var(--bg-white); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 32px; transition: all var(--transition); cursor: pointer; position: relative; overflow: hidden; }
.guide-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, var(--primary), var(--primary-light)); transform: scaleX(0); transition: transform var(--transition); transform-origin: left; }
.guide-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: transparent; }
.guide-card:hover::before { transform: scaleX(1); }
.guide-card-num { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; background: var(--bg-warm); border-radius: 50%; font-family: "Outfit", sans-serif; font-weight: 700; color: var(--primary); margin-bottom: 16px; }
.guide-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 10px; color: var(--text-dark); }
.guide-card p { font-size: 0.9rem; color: var(--text-mid); line-height: 1.7; margin-bottom: 16px; }
.guide-card-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.guide-card-tags span { background: rgba(156,200,41,0.08); color: var(--primary); padding: 3px 10px; border-radius: 12px; font-size: 0.75rem; font-weight: 600; }
.guide-detail { display: none; background: var(--bg-white); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 40px; margin-bottom: 32px; }
.guide-detail.active { display: block; }
.guide-detail-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 32px; }
.guide-detail-header h3 { font-size: 1.4rem; font-weight: 700; }
.guide-detail-close { width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; cursor: pointer; font-size: 1.2rem; background: var(--bg-light); }
.guide-detail-body h4 { font-size: 1.1rem; font-weight: 700; margin: 24px 0 12px; color: var(--text-dark); }
.guide-detail-body h4:first-child { margin-top: 0; }
.guide-detail-body p { font-size: 0.95rem; color: var(--text-mid); line-height: 1.8; margin-bottom: 12px; }
.guide-detail-body ul, .guide-detail-body ol { padding-left: 24px; margin-bottom: 16px; }
.guide-detail-body li { font-size: 0.95rem; color: var(--text-mid); line-height: 1.8; margin-bottom: 6px; }
.guide-table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 0.9rem; border-radius: var(--radius); overflow: hidden; }
.guide-table th { background: var(--bg-warm); padding: 12px 14px; text-align: left; font-weight: 600; color: var(--text-dark); }
.guide-table td { padding: 10px 14px; border-bottom: 1px solid var(--border); color: var(--text-mid); }
.guide-table tr:hover td { background: var(--bg-light); }
.tip-box { background: var(--bg-warm); border-left: 4px solid var(--primary); padding: 16px 20px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; margin: 16px 0; }
.tip-box p { font-size: 0.9rem; color: var(--text-dark); margin: 0; }
.comparison-banner { background: linear-gradient(135deg, #9CC829, #B3E044); border-radius: var(--radius-lg); padding: 60px 24px; color: #fff; text-align: center; margin: 48px 0; }
.comparison-banner h3 { font-family: var(--font-display, 'Outfit', sans-serif); font-size: 28px; font-weight: 700; color: #fff; margin-bottom: 10px; }
.comparison-banner p { font-size: 16px; color: rgba(255,255,255,0.9); margin-bottom: 24px; }
@media (max-width: 1024px) { .guide-grid { grid-template-columns: 1fr; } }
@media (max-width: 768px) { .calc-row { grid-template-columns: 1fr; } .guide-hero { padding: 60px 24px 40px; } .guide-hero-stats { gap: 24px; } .guide-detail { padding: 24px; } .comparison-banner { padding: 32px 24px; } }

/* ===== Guide Page Animations ===== */
@keyframes guide-fade-up {
  from { opacity: 0; transform: translateY(25px); }
  to { opacity: 1; transform: translateY(0); }
}
.guide-hero h1 { opacity: 0; animation: guide-fade-up 0.6s 0.2s ease forwards; }
.guide-hero p { opacity: 0; animation: guide-fade-up 0.6s 0.4s ease forwards; }
.guide-hero-stats { opacity: 0; animation: guide-fade-up 0.6s 0.6s ease forwards; }
.guide-hero-stat { transition: transform 0.3s ease; }
.guide-hero-stat:hover { transform: translateY(-4px); }
.guide-hero-stat-value { transition: text-shadow 0.3s ease; }
.guide-hero-stat:hover .guide-hero-stat-value { text-shadow: 0 0 20px rgba(156,200,41,0.4); }

.power-calculator { opacity: 0; animation: guide-fade-up 0.6s 0.3s ease forwards; }

.guide-card { opacity: 0; transform: translateY(25px); transition: opacity 0.5s ease, transform 0.5s ease; }
.section.revealed .guide-card { opacity: 1; transform: translateY(0); }
.section.revealed .guide-card:nth-child(1) { transition-delay: 0.1s; }
.section.revealed .guide-card:nth-child(2) { transition-delay: 0.2s; }
.section.revealed .guide-card:nth-child(3) { transition-delay: 0.3s; }
.section.revealed .guide-card:nth-child(4) { transition-delay: 0.4s; }
.section.revealed .guide-card:nth-child(5) { transition-delay: 0.5s; }
.section.revealed .guide-card:nth-child(6) { transition-delay: 0.6s; }
.section.revealed .guide-card:nth-child(7) { transition-delay: 0.7s; }

/* 冷凝炉对比表 */
.comparison-table-section { background: var(--bg-white); border-radius: var(--radius-lg); padding: 40px 24px; margin: 48px 0; border: 1px solid var(--border); }
.comparison-table-section h2 { font-size: 1.5rem; font-weight: 700; text-align: center; margin-bottom: 8px; }
.comparison-desc { text-align: center; color: var(--text-mid); margin-bottom: 24px; font-size: 0.95rem; }
.comparison-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.comparison-table thead th { background: var(--bg-warm); padding: 14px 16px; text-align: left; font-weight: 600; color: var(--text-dark); }
.comparison-table thead th:first-child { border-radius: var(--radius-sm) 0 0 0; }
.comparison-table thead th:last-child { border-radius: 0 var(--radius-sm) 0 0; }
.comparison-table tbody td { padding: 12px 16px; border-bottom: 1px solid var(--border); color: var(--text-mid); vertical-align: top; }
.comparison-table tbody tr:last-child td { border-bottom: none; }
.comparison-table tbody tr:hover td { background: var(--bg-light); }
.comparison-table tbody td:first-child { font-weight: 600; color: var(--text-dark); }
.comparison-table tbody td:nth-child(3) { color: var(--primary-dark, #6B8A1A); font-weight: 500; }
.comparison-note { font-size: 0.85rem; color: var(--text-mid); margin-top: 12px; text-align: left; padding: 8px 0; }