/* CSS is identical to our other pages for brand consistency */
        :root {
          --primary-color: #0057b7; --primary-light: #e6f0fa; --background-color: #f8f9fa; --card-bg-color: #ffffff; --text-color: #333333; --heading-color: #1a1a1a; --subtle-text: #5f6368; --separator-color: #e0e0e0; --border-radius: 12px; --nav-height: 65px; --font-family-base: -apple-system, BlinkMacSystemFont, "PingFang TC", "Microsoft JhengHei", "Segoe UI", "Helvetica Neue", sans-serif;
        }
        *, *::before, *::after { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body { font-family: var(--font-family-base); margin: 0; background-color: var(--background-color); color: var(--text-color); line-height: 1.75; -webkit-font-smoothing: antialiased; }
        body.nav-open { overflow: hidden; }
        .container { max-width: 1100px; margin: 0 auto; padding: 0 20px 40px; }
        h1, h2, h3 { color: var(--heading-color); font-weight: 700; letter-spacing: 0.5px; }
        h1 { font-size: 2.6rem; text-align: center; margin: 30px 0 15px; }
        .page-subtitle { text-align: center; font-size: 1.1rem; color: var(--subtle-text); margin-bottom: 50px; max-width: 680px; margin-left: auto; margin-right: auto; }
        h2 { font-size: 2rem; margin: 0 0 25px 0; display: flex; align-items: center; gap: 14px; }
        h2 .icon { display: inline-flex; justify-content: center; align-items: center; width: 40px; height: 40px; background-color: var(--primary-light); border-radius: 8px; color: var(--primary-color); }
        h2 .icon svg { width: 22px; height: 22px; }
        .main-nav { background-color: rgba(255, 255, 255, 0.9); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid var(--separator-color); position: sticky; top: 0; z-index: 1000; height: var(--nav-height); display: flex; align-items: center; }
        .nav-content { max-width: 1100px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; width: 100%; padding: 0 20px; }
        .nav-logo { font-weight: 700; font-size: 1.4rem; color: var(--heading-color); text-decoration: none; z-index: 1011; }
        .nav-links { position: fixed; top: 0; left: 0; width: 100%; height: 100vh; background-color: var(--card-bg-color); display: flex; flex-direction: column; justify-content: center; align-items: center; transition: transform 0.3s cubic-bezier(0.65, 0, 0.35, 1); transform: translateX(100%); z-index: 1005; }
        .nav-links.is-active { transform: translateX(0); }
        .nav-links a { margin: 20px 0; font-size: 1.5rem; color: var(--heading-color); font-weight: 700; text-decoration: none; }
        .mobile-nav-toggle { display: block; background: transparent; border: none; cursor: pointer; padding: 10px; z-index: 1010; }
        .mobile-nav-toggle .bar { display: block; width: 25px; height: 3px; background-color: var(--heading-color); margin: 5px 0; transition: all 0.3s ease-in-out; }
        .mobile-nav-toggle.is-active .bar:nth-child(1) { transform: translateY(8px) rotate(45deg); }
        .mobile-nav-toggle.is-active .bar:nth-child(2) { opacity: 0; }
        .mobile-nav-toggle.is-active .bar:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
        @media (min-width: 1025px) { .nav-links { position: static; transform: none; background-color: transparent; flex-direction: row; height: auto; width: auto; transition: none; } .nav-links a { margin: 0 0 0 25px; font-size: 1rem; font-weight: 500; color: var(--subtle-text); padding-bottom: 4px; } .nav-links a:hover { color: var(--primary-color); } .nav-links a[aria-current="page"] { color: var(--primary-color); font-weight: 700; border-bottom: 2px solid var(--primary-color); } .mobile-nav-toggle { display: none; } }
        .sticky-layout-container { display: grid; grid-template-columns: 1fr 420px; gap: 40px; align-items: flex-start; margin-top: 30px; }
        .content-column { min-width: 0; }
        .calculator-wrapper { position: sticky; top: calc(var(--nav-height) + 30px); min-width: 0; }
        @media (max-width: 1024px) { .sticky-layout-container { grid-template-columns: 1fr; } .calculator-wrapper { order: -1; position: static; margin-bottom: 40px; } }
        .content-section-card { background-color: var(--card-bg-color); border: 1px solid var(--separator-color); border-radius: var(--border-radius); padding: 30px 35px; margin-bottom: 30px; box-shadow: 0 4px 30px rgba(0,0,0,0.04); }
        .faq-accordion details { border-bottom: 1px solid var(--separator-color); padding: 18px 5px; }
        .faq-accordion summary { font-size: 1.1rem; font-weight: 700; color: var(--heading-color); cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; }
        .faq-accordion summary::-webkit-details-marker { display: none; }
        .faq-accordion summary::after { content: '›'; font-size: 1.8rem; font-weight: 700; color: var(--primary-color); transform: rotate(0); transition: transform 0.2s; }
        .faq-accordion details[open] summary::after { transform: rotate(90deg); }
        .faq-accordion .faq-answer { padding: 10px 5px 0 5px; margin-top: 8px; color: var(--subtle-text); }
        .calculator-app-card { background-color: var(--card-bg-color); border-radius: var(--border-radius); padding: 30px; box-shadow: 0 4px 60px rgba(0, 0, 0, 0.05); border: 1px solid var(--separator-color); }
        .form-group { margin-bottom: 20px; }
        .form-group label { display: block; margin-bottom: 8px; font-weight: 500; font-size: 0.95rem; }
        .form-group input, .form-group select { width: 100%; padding: 14px; border: 1px solid var(--separator-color); border-radius: 8px; font-size: 1.1rem; background: var(--background-color); font-family: var(--font-family-base); }
        .time-input-group { display: flex; gap: 10px; align-items: flex-end; }
        .time-input-group .form-group { flex: 1; }
        .calculate-btn { width: 100%; padding: 16px; background: linear-gradient(45deg, var(--primary-color), #007bff); color: white; border: none; border-radius: 8px; font-size: 1.2rem; font-weight: 700; cursor: pointer; }
        .results-dashboard { margin-top: 30px; text-align: center; }
        .summary-container { background: var(--primary-light); padding: 25px; border-radius: var(--border-radius); }
        .summary-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 15px; }
        .summary-item-label { font-size: 1rem; color: var(--subtle-text); }
        .summary-item-value { display: block; font-weight: 700; color: var(--heading-color); font-size: 1.5rem; margin-top: 4px; }
        .info-card { background-color: var(--background-color); padding: 25px; border-radius: var(--border-radius); border: 1px solid var(--separator-color); margin-top: 20px; }
        .table-wrapper { overflow-x: auto; border: 1px solid var(--separator-color); border-radius: 8px; }
        table { width: 100%; border-collapse: collapse; text-align: left; }
        /* 【迭代核心 1】補全表格樣式 */
        table th, table td { padding: 12px 15px; border-bottom: 1px solid var(--separator-color); border-right: 1px solid var(--separator-color); }
        table th:last-child, table td:last-child { border-right: none; }
        table thead th { background-color: #f8f9fa; font-weight: 700; text-align: center;}
        table tbody td { text-align: center; }
        table tbody tr:nth-child(odd) { background-color: rgba(0, 87, 183, 0.02); }
        
        .load-example-btn { background-color: var(--primary-color); color: white; border: none; padding: 10px 18px; border-radius: 8px; font-size: 0.95rem; font-weight: 500; cursor: pointer; margin-top: 15px; }
        .site-footer { background-color: #e9ecef; color: var(--subtle-text); padding: 40px 20px; margin-top: 60px; text-align: center; font-size: 0.9rem; }
        .footer-links a { color: var(--subtle-text); text-decoration: none; margin: 0 10px; }
        code { background: #f0f4f9; padding: 4px 8px; border-radius: 6px; font-family: "SFMono-Regular", Consolas, Menlo, monospace; }