:root {
            /* 顏色規範：深海航道色調 */
            --deep-sea: #05111B; 
            --bronze-gold: #A8823A; 
            --parchment: #F8F4EC; 
            --text-dark: #1A1A1A;
            --text-muted: #333333; /* 限制最淡顏色為 #333 */
            --bezier: cubic-bezier(0.22, 1, 0.36, 1);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            background-color: var(--parchment);
            color: var(--text-dark);
            font-family: 'Noto Sans TC', sans-serif;
            font-weight: 400;
            line-height: 1.8;
            overflow-x: hidden;
            font-size: 16px; /* 確保基底字級為 16px */
        }

        h1, h2, h3 {
            font-family: 'Playfair Display', 'Noto Sans TC', serif;
            letter-spacing: -0.01em;
            font-weight: 400;
        }

        /* 標籤文字：字級鎖定 16px 以上 */
        .label-text {
            text-transform: uppercase;
            letter-spacing: 0.5em;
            font-size: 1rem; /* 16px */
            color: var(--bronze-gold);
            display: block;
            margin-bottom: 1rem;
            font-weight: 400;
        }

        /* --- Gold Rule 分隔線 --- */
        .gold-rule {
            width: 100%;
            height: 6px;
            margin: 3rem 0;
            position: relative;
        }
        .gold-rule::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--bronze-gold);
        }
        .gold-rule::after {
            content: '';
            position: absolute;
            top: 4px;
            left: 0;
            width: 100%;
            height: 1px;
            background: var(--bronze-gold);
            opacity: 0.4;
        }

        /* --- Hero Section (置入上傳之影像) --- */
        .hero {
            height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            color: white;
            position: relative;
            padding: 2rem;
            background-image: 
                radial-gradient(circle, transparent 20%, rgba(5, 17, 27, 0.2) 100%),
                url('https://athena.noon360.com/noon360/shop0305/ClassInfo/sidelight-mt-fairweather-glacier-bay-national-park-alaska_20260407_22500942.jpg');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            overflow: hidden;
        }

        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: 
                repeating-linear-gradient(45deg, transparent, transparent 2px, rgba(255,255,255,0.01) 2px, rgba(255,255,255,0.01) 3px),
                repeating-linear-gradient(135deg, transparent, transparent 2px, rgba(255,255,255,0.01) 2px, rgba(255,255,255,0.01) 3px);
            pointer-events: none;
        }

        .hero-content {
            z-index: 2;
            max-width: 900px;
        }

        .hero-badge {
            display: inline-block;
            border-top: 1px solid white;
            border-bottom: 1px solid white;
            padding: 0.8rem 3rem;
            margin-bottom: 2.5rem;
            letter-spacing: 0.6em;
            font-size: 1rem; /* 確保 badge 文字不小於 16px */
            color: white;
            font-weight: 400;
        }

        .hero h1 {
            font-size: clamp(3rem, 7vw, 5rem);
            margin-bottom: 2rem;
            line-height: 1.1;
            text-shadow: 0 10px 30px rgba(0,0,0,0.6);
        }

        .hero p {
            font-size: 1.25rem;
            max-width: 650px;
            margin: 0 auto;
            letter-spacing: 0.1em;
            font-weight: 400;
            text-shadow: 0 2px 10px rgba(0,0,0,0.5);
        }

        /* --- 容器與排版 --- */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 8rem 1.5rem;
        }

        .section-title {
            text-align: center;
            margin-bottom: 5rem;
        }

        .section-title h2 {
            font-size: 3rem;
            color: var(--deep-sea);
        }

        /* --- 航程卡片 (細線規則) --- */
        .itinerary-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 1px; 
            background-color: rgba(168, 130, 58, 0.25);
            border: 1px solid rgba(168, 130, 58, 0.25);
        }

        .itinerary-card {
            background-color: var(--parchment);
            padding: 4.5rem 3.5rem;
            transition: all 0.7s var(--bezier);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .itinerary-card:hover {
            transform: translateY(-10px);
            z-index: 10;
            box-shadow: 0 30px 60px rgba(5, 17, 27, 0.12);
            background-color: white;
        }

        .itinerary-card::before {
            content: '';
            position: absolute;
            top: 0; left: 0;
            width: 100%; height: 3px;
            background: linear-gradient(90deg, transparent, var(--bronze-gold), transparent);
            transform: translateX(-100%);
            transition: transform 0.9s var(--bezier);
        }

        .itinerary-card:hover::before {
            transform: translateX(100%);
        }

        .card-date {
            font-size: 1rem; /* 確保日期為 16px */
            color: var(--bronze-gold);
            margin-bottom: 1.5rem;
            font-weight: 500;
            letter-spacing: 0.15em;
        }

        .card-title {
            font-size: 1.75rem;
            margin-bottom: 1.5rem;
            color: var(--deep-sea);
            line-height: 1.4;
        }

        /* --- 內容區塊 --- */
        .features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
            gap: 6rem;
            align-items: flex-start;
        }

        .feature-text h3 {
            font-size: 2.2rem;
            margin-bottom: 2rem;
            color: var(--deep-sea);
        }

        .feature-text li {
            padding: 1.5rem 0;
            border-bottom: 1px solid rgba(168, 130, 58, 0.15);
            display: flex;
            justify-content: space-between;
            font-size: 1.05rem; /* 字級調整 */
        }

        .feature-text li span:last-child {
            color: var(--bronze-gold);
            font-weight: 500;
        }

        /* --- 按鈕 (呼吸感) --- */
        .btn {
            display: inline-block;
            background-color: var(--deep-sea);
            color: var(--parchment);
            padding: 1.5rem 3.5rem;
            text-decoration: none;
            text-transform: uppercase;
            letter-spacing: 0.2em;
            font-size: 1rem; /* 確保按鈕文字為 16px */
            transition: all 0.6s var(--bezier);
            border: 1px solid var(--deep-sea);
            cursor: pointer;
            text-align: center;
        }

        .btn:hover {
            background-color: transparent;
            color: var(--deep-sea);
            letter-spacing: 0.35em;
            padding-left: 4.5rem;
            padding-right: 4.5rem;
        }

        .btn-gold {
            background-color: var(--bronze-gold);
            border-color: var(--bronze-gold);
        }
        .btn-gold:hover {
            color: var(--bronze-gold);
        }

        /* --- 價格表格 --- */
        .price-table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 4rem;
        }

        .price-table th, .price-table td {
            padding: 2rem 1.5rem;
            text-align: left;
            border-bottom: 1px solid rgba(168, 130, 58, 0.2);
        }

        .price-table th {
            color: var(--bronze-gold);
            font-weight: 500;
            letter-spacing: 0.3em;
            text-transform: uppercase;
            font-size: 1rem; /* 確保標頭為 16px */
        }

        .price-table td {
            font-size: 1.2rem;
            color: var(--deep-sea);
        }

        /* --- 頁尾 --- */
        footer {
            background-color: var(--deep-sea);
            color: var(--parchment);
            padding: 10rem 1.5rem;
            text-align: center;
        }

        .footer-logo {
            font-family: 'Playfair Display', serif;
            font-size: 2.5rem;
            margin-bottom: 3rem;
            display: block;
            letter-spacing: 0.1em;
        }

        .footer-note {
            color: #999; /* 較淺但仍有足夠對比 */
            font-size: 1rem; /* 確保註解為 16px */
            max-width: 700px;
            margin: 4rem auto 0;
            letter-spacing: 0.05em;
        }

        /* 小字級規範強化：確保所有 P 和內容文字 */
        p, li, small, span {
            font-size: 1rem; 
            color: inherit;
        }

        small {
            color: var(--text-muted) !important; /* 確保 small 不會太淡 */
            font-size: 1rem !important;
        }

        /* --- 響應式調整 --- */
        @media (max-width: 768px) {
            .hero h1 { font-size: 3.2rem; }
            .section-title h2 { font-size: 2.5rem; }
            .container { padding: 6rem 1.5rem; }
            .price-table td { font-size: 1.05rem; }
        }