.burger-menu-btn { position: fixed; top: 30px; right: 30px; width: 50px; height: 50px; background-color: var(--main-dark-color); border-radius: 50%; display: flex; flex-direction: column; justify-content: center; align-items: center; cursor: pointer; z-index: 1000; box-shadow: 0 4px 10px rgba(0,0,0,0.1); opacity: 0; transform: scale(0.8); transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1), background-color 0.3s, box-shadow 0.3s; }
.splash-done .burger-menu-btn { opacity: 1; transform: scale(1); }
@media (hover: hover) and (pointer: fine) { .burger-menu-btn:hover { transform: scale(1.1) rotate(90deg) !important; box-shadow: 0 8px 20px rgba(0,0,0,0.15); } }
.burger-line { width: 20px; height: 1px; background-color: white; margin: 3px 0; transition: 0.3s; }
#menu-panel { position: fixed; top: 0; bottom: 0; left: 0; right: 0; width: 100%; height: 100%; height: 100dvh; background-color: var(--main-dark-color); z-index: 999; display: flex; flex-direction: column; justify-content: center; align-items: center; opacity: 0; visibility: hidden; transition: opacity 0.4s ease, visibility 0.4s; }
#menu-panel.open { opacity: 1; visibility: visible; }
.menu-item { font-size: clamp(17px, 2.5vw, 22px); letter-spacing: clamp(4px, 0.8vw, 8px); margin: clamp(16px, 3.2vh, 32px) 0; cursor: pointer; color: var(--text-light); transition: 0.3s; opacity: 0; transform: translateY(20px); }
#menu-panel.open .menu-item { opacity: 1; transform: translateY(0); }
#menu-panel.open .menu-item:nth-child(1) { transition: 0.5s ease 0.2s; }
#menu-panel.open .menu-item:nth-child(2) { transition: 0.5s ease 0.3s; }
#menu-panel.open .menu-item:nth-child(3) { transition: 0.5s ease 0.4s; }
#menu-panel.open .menu-item:nth-child(4) { transition: 0.5s ease 0.5s; }
#menu-panel.open .menu-item:nth-child(5) { transition: 0.5s ease 0.6s; }
.menu-item::after { content: ''; display: block; width: 0; height: 1px; background: rgba(255,255,255,0.6); transition: 0.4s; margin: 8px auto 0; }
@media (hover: hover) and (pointer: fine) { .menu-item:hover::after { width: 100%; } }
#menu-panel.open ~ .burger-menu-btn .burger-line:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
#menu-panel.open ~ .burger-menu-btn .burger-line:nth-child(2) { opacity: 0; }
#menu-panel.open ~ .burger-menu-btn .burger-line:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }
#main-content { min-height: 100vh; box-sizing: border-box; }
.page-section { display: none; animation: fadeIn 0.6s ease; }
.page-section.active { display: block; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.section-title { font-size: 26px; letter-spacing: 12px; margin-bottom: 60px; font-weight: 400; text-align: center; border-bottom: 1px solid var(--border-color); padding-bottom: 20px; }
/* 角落裝飾預設隱藏（行動端不顯示），電腦版媒體查詢內會設為 position:absolute */
.menu-corner-lt, .menu-corner-rb { display: none; }

.site-footer { text-align: center; padding: 40px 20px; border-top: 1px solid var(--border-color); font-size: 12px; letter-spacing: 2px; color: #888; background-color: transparent; }

@media (min-width: 1025px) { 
    #page-news, #page-about, #page-rules, #page-news-detail { padding: 100px var(--global-padding); } 
}

@media (max-width: 1024px) { 
    .burger-menu-btn { 
        top: calc(max(15px, env(safe-area-inset-top)) + 10px); 
        right: calc(max(15px, env(safe-area-inset-right)) + 10px); 
        width: 44px; 
        height: 44px; 
    } 
    #menu-panel { 
        justify-content: center; 
        padding: 0; 
        background-color: rgba(49, 77, 96, 0.98); 
        backdrop-filter: blur(20px); 
        -webkit-backdrop-filter: blur(20px); 
    }

    #page-news, #page-about, #page-rules, #page-news-detail { 
        padding: calc(max(60px, env(safe-area-inset-top)) + 40px) var(--mobile-padding) 60px; 
    } 
    .section-title { font-size: 20px; margin-bottom: 40px; } 
}