:root {
    --bg-main: #0b0f14;
    --bg-secondary: #111826;
    --text-primary: #ffffff;
    --text-secondary: #a7b0bf;
    --accent-color: #22c55e;
    --accent-hover: #16a34a;
    --border-color: #1f2a3a;
    --section-spacing: 80px;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
    background: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.6;
}

a { text-decoration: none; color: inherit; transition: color 0.3s; }
h1, h2, h3 { margin-top: 0; line-height: 1.2; }
p { color: var(--text-secondary); margin-bottom: 1rem; }
.container { width: 90%; max-width: 1200px; margin: 0 auto; }
.section { padding: var(--section-spacing) 0; }

/* Navbar */
.navbar {
    background: rgba(11, 15, 20, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 100;
}
.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
}
.logo { font-size: 1.5rem; font-weight: 700; color: var(--accent-color); }
.nav-links { display: flex; gap: 24px; align-items: center; }
.nav-links a { font-weight: 500; font-size: 0.95rem; }
.nav-links a:hover { color: var(--accent-color); }

/* Language Selector */
.lang-select {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
}
.lang-select:hover { border-color: var(--accent-color); color: var(--text-primary); }
.lang-select option { background: var(--bg-secondary); color: var(--text-primary); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 12px;
    font-weight: 700;
    text-align: center;
    transition: transform 0.2s, background 0.3s;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--accent-color); color: #05210f; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary { background: #fff; color: #000; }
.btn-secondary:hover { background: #e5e7eb; }
.download-btns { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 24px; }

/* Hero Section Updates */
.hero {
    padding-top: 160px;
    display: flex;
    align-items: center;
    gap: 20px; /* 稍微縮小整個區塊間距 */
    min-height: 80vh;
}
.hero-content {
    flex: 0.8; /* 文字區塊稍微變窄一點，留空間給圖片 */
}

/* 👇👇👇 三張圖片排版設定 👇👇👇 */
.hero-image {
    flex: 1.4; /* 圖片區塊變寬 */
    display: flex;
    justify-content: center;
    align-items: flex-start; /* 改為靠上對齊，因為有用 margin-top 做階梯 */
    gap: 16px; /* 圖片間距 */
}

.hero-image img {
    /* 讓三張圖平分空間 (100% / 3) */
    width: calc(33.33% - 10px); 
    height: auto;
    border-radius: 16px; /* 圓角稍微縮小一點 */
    border: 2px solid var(--border-color);
    box-shadow: 0 15px 30px rgba(0,0,0,0.5);
    object-fit: contain;
}
/* 👆👆👆 修改結束 👆👆👆 */

.page-header { padding-top: 120px; padding-bottom: 40px; text-align: center; }
.page-header h1 { font-size: 2.5rem; margin-bottom: 16px; }

/* Features */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    margin-top: 40px;
}
.feature-card {
    background: var(--bg-secondary);
    padding: 32px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: border-color 0.3s;
}
.feature-card:hover { border-color: var(--accent-color); }
.feature-icon { font-size: 2rem; margin-bottom: 16px; color: var(--accent-color); }
.feature-card h3 { font-size: 1.25rem; margin-bottom: 12px; }

/* Guide Steps */
.step { display: flex; gap: 24px; margin-bottom: 40px; align-items: flex-start; }
.step-number {
    background: var(--accent-color); color: #000;
    width: 40px; height: 40px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-weight: bold; flex-shrink: 0;
}
.step-content h3 { margin-bottom: 12px; }
.step-image img { margin-top: 16px; border-radius: 12px; border: 1px solid var(--border-color); max-width: 100%; width: 300px; }

/* Legal Content */
.legal-content { background: var(--bg-secondary); padding: 40px; border-radius: 16px; border: 1px solid var(--border-color); }
.legal-content h2, .legal-content h3 { margin-top: 32px; color: var(--accent-color); }
.legal-content ul { color: var(--text-secondary); padding-left: 20px; }
.legal-content li { margin-bottom: 8px; }

/* Footer */
.footer { background: var(--bg-secondary); padding: 40px 0; margin-top: var(--section-spacing); border-top: 1px solid var(--border-color); text-align: center; }
.footer-links { display: flex; justify-content: center; gap: 24px; margin-bottom: 24px; flex-wrap: wrap; }
.footer-links a:hover { text-decoration: underline; }
.copyright { font-size: 0.9rem; color: var(--text-secondary); }

/* Responsive */
@media (max-width: 768px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 120px;
    }
    .hero h1 { font-size: 2.5rem; }
    .nav-links > a { display: none; } 
    .download-btns { justify-content: center; }

    /* 手機版三張圖調整 */
    .hero-image {
        width: 100%;
        gap: 8px;
        align-items: center; /* 手機版改回置中對齊 */
    }
    
    .hero-image img {
        margin-top: 0 !important; /* 手機版取消階梯效果，避免跑版 */
        width: 32%; /* 三張並排 */
    }

    .step { flex-direction: column; }
    .step-image img { width: 100%; }
}