/* public/landing.css */
.landing-body { background-color: #0b1120; color: #f8fafc; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; margin: 0; padding: 0; overflow-x: hidden; }
.landing-header { display: flex; justify-content: space-between; align-items: center; padding: 20px 40px; background: rgba(15, 23, 42, 0.9); backdrop-filter: blur(10px); border-bottom: 1px solid #1e293b; position: fixed; top: 0; width: 100%; box-sizing: border-box; z-index: 100; }
.logo { font-size: 1.5rem; font-weight: 900; color: #38bdf8; letter-spacing: 1px; }
.header-actions { display: flex; align-items: center; gap: 20px; }
.btn-outline { background: transparent; border: 1px solid #38bdf8; color: #38bdf8; padding: 8px 20px; border-radius: 8px; cursor: pointer; font-weight: bold; transition: 0.3s; }
.btn-outline:hover { background: #38bdf8; color: #0f172a; }
.hamburger { font-size: 1.8rem; color: #cbd5e1; cursor: pointer; transition: 0.3s; }
.hamburger:hover { color: #38bdf8; }

/* 側邊欄 (Sidebar) */
.sidebar { position: fixed; top: 0; right: -350px; width: 300px; height: 100vh; background: #0f172a; border-left: 1px solid #1e293b; box-shadow: -10px 0 30px rgba(0,0,0,0.5); transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1); z-index: 1000; display: flex; flex-direction: column; }
.sidebar.open { right: 0; }
.sidebar-header { display: flex; justify-content: space-between; align-items: center; padding: 25px; border-bottom: 1px solid #1e293b; font-size: 1.2rem; font-weight: bold; color: #e0f2fe; }
.close-btn { background: transparent; border: none; color: #94a3b8; font-size: 1.5rem; cursor: pointer; }
.close-btn:hover { color: #ef4444; }
.sidebar-content { padding: 20px 0; display: flex; flex-direction: column; gap: 5px; }
.sidebar-content a { color: #94a3b8; text-decoration: none; padding: 15px 25px; font-size: 1rem; transition: 0.3s; border-left: 3px solid transparent; }
.sidebar-content a:hover, .sidebar-content a.active { background: #162032; color: #38bdf8; border-left-color: #38bdf8; }
.sidebar-content hr { border: 0; height: 1px; background: #1e293b; margin: 15px 25px; }

/* 遮罩 */
.overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.6); backdrop-filter: blur(3px); z-index: 999; opacity: 0; pointer-events: none; transition: 0.4s; }
.overlay.open { opacity: 1; pointer-events: auto; }

/* 英雄區塊 (Hero Section) */
.hero-section { margin-top: 100px; padding: 60px 20px; text-align: center; max-width: 900px; margin-left: auto; margin-right: auto; }
.hero-section h1 { font-size: 3.5rem; margin-bottom: 20px; color: #f8fafc; }
.highlight { color: #818cf8; text-shadow: 0 0 20px rgba(129, 140, 248, 0.5); }
.hero-section p { font-size: 1.2rem; color: #94a3b8; line-height: 1.8; margin-bottom: 40px; }
.btn-primary.large { font-size: 1.2rem; padding: 15px 40px; border-radius: 12px; }

/* 版本卡片區 */
.version-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; margin-top: 60px; }
.v-card { background: #162032; border: 1px solid #1e293b; border-radius: 15px; padding: 30px 20px; transition: 0.3s; position: relative; overflow: hidden; }
.v-card.active { border-color: #38bdf8; box-shadow: 0 10px 30px rgba(56, 189, 248, 0.15); cursor: pointer; }
.v-card.active:hover { transform: translateY(-5px); }
.v-card.disabled { opacity: 0.5; filter: grayscale(100%); cursor: not-allowed; }
.v-card h3 { margin: 0 0 15px 0; color: #e0f2fe; }
.v-card p { font-size: 0.9rem; color: #94a3b8; margin: 0; line-height: 1.5; }
.badge { position: absolute; top: 10px; right: -25px; background: #ef4444; color: white; font-size: 0.7rem; font-weight: bold; padding: 5px 30px; transform: rotate(45deg); }
.v-card.active .badge { background: #10b981; }