:root {
    --color-bg-main: #1c1c1c;
    --color-bg-header: #282828;
    --color-text-white: #FFFFFF;
    --color-text-gray: rgba(255, 255, 255, 0.7);
    --color-logo-bg: #4092ff;
    --color-link-hover: #ffffff;
    --color-mobile-tab: #3a3a3a;
    --color-drawer-bg: #282828; /* 手机抽屉菜单背景色 */
    --drawer-width: 250px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Arial', sans-serif;
    background-color: var(--color-bg-main);
    color: var(--color-text-white);
    overflow-x: hidden;
    padding-bottom: 60px; /* Mobile Tab space */
}

a { text-decoration: none; color: inherit; }
.container { max-width: 1400px; margin: 0 auto; }

/* --- 2. Mobile Menu Drawer (新添加) --- */
.mobile-menu-drawer {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--drawer-width);
    height: 100vh;
    background-color: var(--color-drawer-bg);
    z-index: 1001;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    box-shadow: 4px 0 10px rgba(0,0,0,0.5);
    overflow-y: auto;
}
.mobile-menu-drawer.active {
    transform: translateX(0);
}
.drawer-header {
    display: flex;
    justify-content: flex-end;
    padding: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.drawer-header .close-btn {
    font-size: 24px;
    cursor: pointer;
}
.drawer-menu a {
    display: block;
    padding: 10px 15px;
    text-transform: uppercase;
    font-size: 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: background-color 0.2s;
}
.drawer-menu a:hover {
    background-color: rgba(255, 255, 255, 0.1);
}
.drawer-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
    z-index: 1000;
    display: none;
}
.drawer-overlay.active {
    display: block;
}
/* End Mobile Drawer */

/* --- 3. 顶部 Header 区域 (Base Styles) --- */
.logo a {
    font-size: 20px;
    font-weight: bold;
    display: inline-block;
    background-color: var(--color-logo-bg);
    color: var(--color-text-white);
    padding: 4px 10px;
    border-radius: 4px;
}

/* --- 4. Content Grid & Footer (Base Styles) --- */
.content { padding: 15px; }
.content-header { font-size: 20px; font-weight: bold; margin-bottom: 15px; display: flex; justify-content: space-between; align-items: center; }
.content-header .arrow-icon { font-size: 20px; color: var(--color-text-gray); cursor: pointer; }
.game-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.game-card { border-radius: 8px; overflow: hidden; box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3); cursor: pointer; }
.game-card img { width: 100%; display: block; aspect-ratio: 1/1; object-fit: cover; }
.tab-content { display: none; }
.tab-content.active { display: block; }
.site-description { padding: 25px 15px; background-color: var(--color-bg-header); color: var(--color-text-gray); font-size: 14px; line-height: 1.6; margin-top: 20px; text-align: justify; }
.footer-copyright { padding: 15px 20px; background-color: var(--color-bg-main); color: var(--color-text-gray); font-size: 12px; text-align: center; }

/* --- 5. Mobile Header & Tab Navigation (Default < 1024px) --- */
.header-top, .header-nav { display: none; }

.mobile-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
    padding: 0 15px;
    background-color: var(--color-bg-header);
}
.mobile-header .menu-icon, .mobile-header .search-icon { font-size: 24px; cursor: pointer; }

.mobile-tab-nav {
    position: fixed; bottom: 0; left: 0; width: 100%; height: 60px;
    background-color: var(--color-mobile-tab); box-shadow: 0 -2px 10px rgba(0,0,0,0.3);
    display: flex; justify-content: space-around; align-items: center; z-index: 100;
}
.mobile-tab-nav a { display: flex; flex-direction: column; align-items: center; font-size: 10px; color: var(--color-text-gray); padding: 5px; }
.mobile-tab-nav a i { font-size: 20px; margin-bottom: 3px; }
.mobile-tab-nav a.active { color: var(--color-text-white); }


/* --- 6. PC Layout & Header (Min-Width: 1024px) --- */
@media (min-width: 1024px) {
    body { padding-bottom: 0; }
    .mobile-header, .mobile-tab-nav, .mobile-menu-drawer, .drawer-overlay { display: none !important; }
    .content { padding: 30px 20px; }
    .content-header { font-size: 28px; margin-bottom: 20px; }
    .game-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 15px; }

    /* PC Header Structure */
    .header-top, .header-nav { display: flex; }
    .header-top { justify-content: space-between; align-items: center; padding: 10px 20px 0 20px; }
    .header-icons { display: flex; align-items: center; gap: 20px; font-size: 16px; }
    .header-icons .favorite { display: flex; align-items: center; gap: 5px; color: var(--color-text-gray); font-size: 12px; cursor: pointer; }
    .header-icons .favorite i { color: var(--color-logo-bg); font-size: 18px; }
    .header-icons .menu-close, .header-icons .search-icon { font-size: 20px; cursor: pointer; }

    /* PC Nav */
    .header-nav { padding: 10px 20px 15px 20px; font-size: 13px; flex-direction: column; }
    .nav-row { display: flex; gap: 20px; margin-bottom: 5px; flex-wrap: wrap; }
    .nav-row a { color: var(--color-text-gray); text-transform: uppercase; padding: 2px 0; }
    .nav-row a:hover, .nav-row a.active { color: var(--color-link-hover); }
}

/* --- 7. Search Expanded Area (Full Screen) --- */
.search-expanded-area { position: fixed; top: 0; left: 0; width: 100%; background-color: var(--color-bg-main); height: 100vh; display: none; opacity: 0; transition: opacity 0.3s ease; z-index: 1000; }
.search-expanded-area.active { display: block; opacity: 1; }

/* ... Search Styles (keeping previous refined styles) ... */
.search-content { padding: 20px; max-width: 1200px; margin: 0 auto; }
.search-header-icons { position: absolute; top: 15px; right: 20px; display: flex; align-items: center; gap: 20px; color: var(--color-text-white); }
.search-header-icons .menu-close { font-size: 30px; cursor: pointer; }
.search-header-icons .favorite { font-size: 16px; display: none; }
.search-input-box { display: flex; align-items: center; border-bottom: 2px solid var(--color-text-white); max-width: 100%; margin-top: 50px; }
.search-input-box input { flex-grow: 1; background: transparent; border: none; color: var(--color-text-white); font-size: 24px; padding: 15px 0; outline: none; }
.search-input-box input::placeholder { color: var(--color-text-gray); }
.search-input-box .search-go-icon { font-size: 24px; color: var(--color-text-white); cursor: pointer; margin-left: 15px; }

@media (min-width: 1024px) {
    .search-content { padding-top: 120px; }
    .search-input-box input { font-size: 32px; }
    .search-input-box .search-go-icon { font-size: 32px; }
    .search-header-icons .favorite { display: flex; }
}