/* --- 1. 核心設定 --- */
:root {
    --brand-blue: #1736F5;
    --brand-dark: #0b1a7a;
    --accent-yellow: #FFC709;
    --text-dark: #333333;
}

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

body {
    background-color: var(--brand-blue);
    background-image: radial-gradient(circle at 50% 10%, #4c6aff 0%, var(--brand-blue) 40%, var(--brand-dark) 100%);
    font-family: 'PingFang TC', 'Microsoft JhengHei', sans-serif;
    min-height: 100vh;
    padding: 40px 20px 120px 20px;
    display: flex;
    justify-content: center;
    color: #fff;
}

.container {
    width: 100%;
    max-width: 1100px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

/* --- 2. 標題區 (透明度 0.8) --- */
.header-card {
    grid-column: span 3;
    background: rgba(255, 255, 255, 1);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: 30px;
    padding: 40px;
    text-align: left;
    position: relative;
    overflow: hidden;
    box-shadow: 0 15px 35px rgba(0,0,0,0.15);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* [修改] 大標題加粗 */
.header-content h1 { 
    /* 指定特粗黑體 */
    font-family: 'Noto Sans TC', sans-serif;
    font-weight: 900;
    
    font-size: 3rem; 
    margin-bottom: 10px; 
    color: var(--brand-blue); 
    line-height: 1.1;
}

.header-content p { 
    font-size: 1.2rem; 
    color: #333; 
    font-weight: 600;
}

.header-tag {
    background: var(--accent-yellow);
    color: var(--brand-blue);
    font-weight: 900;
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 0.85rem;
    display: inline-block;
    margin-bottom: 15px;
}

/* --- 3. 核心價值 (黃色強調) --- */
.value-card {
    grid-column: span 3;
    background: var(--accent-yellow);
    color: var(--brand-blue);
    border-radius: 30px;
    padding: 30px;
    text-align: center;
    font-weight: bold;
    font-size: 1.3rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

/* --- 4. 適用場景 (透明度 0.5) --- */
.scope-card {
    grid-column: span 1;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(15px);
    border-radius: 30px;
    padding: 30px;
    border: 1px solid rgba(255, 255, 255, 0.4);
    color: #333;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.scope-card h3 { color: var(--brand-blue); font-size: 1.4rem; font-weight: 900; }
.scope-list li { margin-bottom: 8px; list-style: none; font-weight: 600; }
.scope-list li::before { content: '• '; color: var(--brand-blue); }

/* --- 5. 開發流程步驟 (重點區) --- */
.process-title-card {
    grid-column: span 3;
    text-align: center;
    padding: 20px;
    margin-top: 20px;
}
/* [修改] 流程大標題加粗 (選擇性，若需要也可加 font-family) */
.process-title-card h2 { font-size: 2.5rem; text-shadow: 0 0 10px rgba(0,0,0,0.3); font-weight: 900; }

.step-card {
    grid-column: span 1;
    background: rgba(255, 199, 9, 0.85);
    backdrop-filter: blur(15px);
    border-radius: 30px;
    padding: 30px;
    border: 1px solid rgba(255, 255, 255, 0.5);
    position: relative;
    overflow: hidden;
    transition: transform 0.3s;
    display: flex;
    flex-direction: column;
    min-height: 220px;
}

.step-card:hover { transform: translateY(-5px); background: rgba(255, 199, 9,1); }

.step-num {
    font-size: 4rem;
    font-weight: 900;
    color: var(--brand-blue);
    opacity: 0.15;
    position: absolute;
    top: 10px;
    right: 20px;
}

/* [修改] 步驟卡片標題加粗 */
.step-card h3 { 
    /* 指定特粗黑體 */
    font-family: 'Noto Sans TC', sans-serif;
    font-weight: 900;
    
    font-size: 1.5rem; 
    color: var(--brand-blue); 
    margin-bottom: 15px; 
    position: relative; 
    z-index: 2; 
}

.step-card p { color: #444; line-height: 1.5; font-weight: 600; position: relative; z-index: 2; }

.step-icon {
    font-size: 2rem;
    color: var(--accent-yellow);
    margin-bottom: 15px;
    background: rgba(23, 54, 245, 1);
    width: 50px; height: 50px;
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
}

/* --- 6. CTA --- */
.cta-card {
    grid-column: span 3;
    text-align: center;
    margin-top: 20px;
    padding: 20px;
    background: rgba(0,0,0,0.2);
    border-radius: 30px;
}

.cta-btn {
    background: var(--accent-yellow);
    color: var(--brand-blue);
    padding: 15px 50px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 900;
    font-size: 1.2rem;
    display: inline-block;
    box-shadow: 0 5px 20px rgba(255, 199, 9, 0.4);
    transition: 0.3s;
}
.cta-btn:hover { transform: scale(1.05); box-shadow: 0 10px 30px rgba(255, 199, 9, 0.6); }

/* --- 導覽列 --- */
.dock-nav {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(255,255,255,0.25);
    backdrop-filter: blur(20px);
    padding: 15px 30px;
    border-radius: 50px;
    display: flex;
    gap: 20px;
    border: 1px solid rgba(255,255,255,0.4);
    z-index: 100;
}
.dock-nav a { text-decoration: none; color: #fff; font-weight: bold; transition: 0.2s; }
.dock-nav a:hover { color: var(--accent-yellow); transform: translateY(-3px); }

/* RWD */
@media (max-width: 900px) {
    .container { grid-template-columns: 1fr; }
    .header-card, .value-card, .scope-card, .step-card, .process-title-card, .cta-card { grid-column: span 1; }
    .dock-nav { 
        width: 90%; 
        justify-content: space-between; 
        padding: 12px 20px; 
        gap: 10px;
        bottom: 20px;
    }
    .dock-nav a { font-size: 0.85rem; }
}