/* ======================================== Section Common Styles ======================================== */
.section-header { margin-bottom: 45px; text-align: center; }
.section-badge { align-items: center; background: rgba(54, 105, 239, 0.1); border-radius: 20px; color: var(--brand-blue); display: inline-flex; font-size: 13px; font-weight: 500; gap: 8px; margin-bottom: 10px; padding: 8px 16px; }
.section-title { color: var(--brand-black); font-size: clamp(28px, 4vw, 36px); font-weight: 700; margin-bottom: 8px; }
.section-subtitle { color: var(--brand-blue); font-size: 16px; font-weight: 500; }
/****************************************使用指南****************************************/
/* ======================================== Hero Section - 与scientistboard.html一致 ======================================== */
.herousageguide { align-items: center; background: linear-gradient(135deg, #1A1A2E 0%, #16213E 50%, #0F3460 100%); display: flex; justify-content: center; min-height: 55vh; overflow: hidden; position: relative; }
.herousageguide-bg { inset: 0; position: absolute; z-index: 0; }
.herousageguide-bg::before { background-image: radial-gradient(circle at 20% 50%, rgba(54, 105, 239, 0.3) 0%, transparent 50%), radial-gradient(circle at 80% 80%, rgba(90, 140, 247, 0.2) 0%, transparent 50%); content: ""; inset: 0; position: absolute; }
.herousageguide-overlay { background: linear-gradient(to bottom, rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0.6)); inset: 0; position: absolute; }
.herousageguide-content { margin: 0 auto; max-width: 1280px; padding: 140px 24px 80px; position: relative; text-align: center; width: 100%; z-index: 2; }
.herousageguide-badge { align-items: center; animation: slideUp 0.8s ease-out 0.2s both; backdrop-filter: blur(8px); background: rgba(255, 255, 255, 0.1); border: 1px solid rgba(255, 255, 255, 0.2); border-radius: 24px; display: inline-flex; gap: 8px; margin-bottom: 32px; padding: 8px 16px; }
.herousageguide-badge span { color: rgba(255, 255, 255, 0.9); font-size: 14px; }
.herousageguide-title { margin-bottom: 24px; }
.herousageguide-title h1 { animation: slideUp 0.8s ease-out 0.4s both; color: var(--brand-white); font-size: clamp(36px, 6vw, 56px); font-weight: 700; line-height: 1.2; margin-bottom: 16px; }
.herousageguide-title span { animation: slideUp 0.8s ease-out 0.5s both; color: rgba(255, 255, 255, 0.8); display: block; font-size: clamp(24px, 4vw, 36px); font-weight: 300; }
.herousageguide-description { animation: slideUp 0.8s ease-out 0.6s both; color: rgba(255, 255, 255, 0.7); font-size: 18px; line-height: 1.7; margin: 0 auto; max-width: 700px; }
@keyframes slideUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}
/* ======================================== Quick Nav ======================================== */
.quick-nav { backdrop-filter: blur(10px); background: rgba(255, 255, 255, 0.95); border: 1px solid rgba(0, 0, 0, 0.05); border-radius: 16px; box-shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.1); padding: 16px 12px; position: fixed; right: 30px; top: 50%; transform: translateY(-50%); z-index: 100; }
.quick-nav ul { list-style: none; }
.quick-nav li { margin-bottom: 8px; }
.quick-nav li:last-child { margin-bottom: 0; }
.quick-nav a { border-radius: 10px; color: var(--brand-gray1); display: block; font-size: 13px; font-weight: 500; min-width: 50px; padding: 10px 16px; text-align: center; text-decoration: none; transition: all var(--transition-normal); }
.quick-nav a:hover { background: var(--brand-gray2); color: var(--brand-black); }
.quick-nav a.active { background: var(--brand-blue); box-shadow: 0 4px 12px rgba(54, 105, 239, 0.3); color: var(--brand-white); }
/* ======================================== Guide Sections ======================================== */
.guide-section { padding: 100px 0; position: relative; }
.guide-section:nth-child(odd) { background: var(--brand-white); }
.guide-section:nth-child(even) { background: var(--brand-gray2); }
/* Product Content Grid */
.product-content { display: grid; gap: 30px; grid-template-columns: repeat(2, 1fr); }
.usage-card { background: var(--brand-white); border: 1px solid var(--brand-gray3); border-radius: 20px; box-shadow: var(--shadow-sm); overflow: hidden; padding: 32px; position: relative; transition: all var(--transition-slow); }
.usage-card::before { background: linear-gradient(90deg, var(--brand-blue), var(--brand-blue-light)); content: ""; height: 4px; left: 0; position: absolute; top: 0; transform: scaleX(0); transition: transform 0.4s ease; width: 100%; }
.usage-card:hover { border-color: transparent; box-shadow: var(--shadow-xl); transform: translateY(-8px); }
.usage-card:hover::before { transform: scaleX(1); }
.usage-card h3 { align-items: center; border-bottom: 1px solid var(--brand-gray3); color: var(--brand-black); display: flex; font-size: 20px; font-weight: 600; gap: 10px; margin-bottom: 20px; padding-bottom: 16px; }
.usage-card h3 i { color: var(--brand-blue); font-size: 18px; }
.usage-card p { color: var(--brand-gray1); font-size: 15px; line-height: 1.8; }
.usage-list { list-style: none; }
.usage-list li { color: var(--brand-gray1); font-size: 15px; line-height: 1.6; margin-bottom: 12px; padding-left: 24px; position: relative; }
.usage-list li::before { background: var(--brand-blue); border-radius: 50%; content: ""; height: 6px; left: 0; position: absolute; top: 10px; width: 6px; }
.note-box { background: linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%); border-left: 4px solid #F59E0B; border-radius: 12px; margin-top: 8px; padding: 20px; }
.note-box .usage-list li::before { background: #F59E0B; }
/* Table Styles */
table { border-collapse: separate; border-radius: 12px; border-spacing: 0; box-shadow: var(--shadow-sm); margin-top: 16px; overflow: hidden; width: 100%; }
th, td { border-bottom: 1px solid var(--brand-gray3); padding: 16px; text-align: left; }
th { background: var(--brand-gray2); color: var(--brand-black); font-size: 14px; font-weight: 600; letter-spacing: 0.5px; text-transform: uppercase; }
td { color: var(--brand-gray1); font-size: 14px; line-height: 1.6; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--brand-gray2); }
/* ======================================== 使用指南 Responsive Design ======================================== */
@media (max-width: 1024px) {
    .quick-nav { display: none; }
    .product-content { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
    .guide-section { padding: 60px 0; }
    .usage-card { padding: 24px; }
    table { font-size: 12px; }
    th, td { padding: 12px; }
}