:root { --sidebar-bg: #1e272e; --primary-color: #3498db; --bg-color: #f4f6f9; }
body { margin: 0; font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif; display: flex; background-color: var(--bg-color); overflow: hidden; }
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #bdc3c7; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #95a5a6; }

.sidebar { width: 220px; background: var(--sidebar-bg); height: 100vh; position: fixed; color: #fff; overflow-y: auto; box-shadow: 2px 0 10px rgba(0,0,0,0.1); z-index: 100; }
.sidebar .logo { padding: 20px; font-size: 18px; font-weight: bold; text-align: center; background: #111417; letter-spacing: 1px; border-bottom: 1px solid #2f3640; }
.sidebar ul { list-style: none; padding: 0; margin: 0; }
.sidebar li a { display: flex; align-items: center; padding: 15px 20px; color: #d2dae2; text-decoration: none; border-left: 4px solid transparent; transition: all 0.3s; }
.sidebar li a:hover { background: #2f3640; border-left-color: var(--primary-color); color: #fff; }
.nav-icon { margin-right: 12px; font-size: 18px; width: 20px; text-align: center;}
.menu-divider { height: 1px; background: #353b48; margin: 10px 20px; }

.main-content { margin-left: 220px; width: calc(100% - 220px); height: 100vh; overflow-y: auto; box-sizing: border-box; scroll-behavior: smooth; }

@media (max-width: 768px) {
    .sidebar { width: 60px; }
    .sidebar .logo { font-size: 12px; padding: 20px 2px; overflow: hidden; white-space: nowrap;}
    .sidebar .nav-text { display: none; }
    .nav-icon { margin-right: 0; font-size: 22px; width: auto;}
    .main-content { margin-left: 60px; width: calc(100% - 60px); }
}

.app-container { display: none; padding: 30px 40px; min-height: 100%; box-sizing: border-box; }
#landscape-container { padding: 0 !important; }

#movie-container { color: #333; padding-bottom: 60px; }
.section-title { font-size: 20px; margin-bottom: 20px; font-weight: bold; display: flex; align-items: center; border-bottom: 2px solid #e0e0e0; padding-bottom: 10px; margin-top: 20px;}
.section-title span { margin-right: 10px; font-size: 22px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 15px; margin-bottom: 30px; }
.card { background: #ffffff; border-radius: 8px; padding: 15px; display: flex; align-items: center; text-decoration: none; color: inherit; transition: all 0.3s; box-shadow: 0 2px 8px rgba(0,0,0,0.05); border: 1px solid #f1f2f6; }
.card:hover { transform: translateY(-3px); box-shadow: 0 8px 15px rgba(0,0,0,0.1); border-color: var(--primary-color); }
.avatar { width: 40px; height: 40px; border-radius: 50%; color: #fff; display: flex; align-items: center; justify-content: center; font-size: 18px; font-weight: bold; margin-right: 12px; flex-shrink: 0; }
.info { flex-grow: 1; overflow: hidden; }
.info .name { font-size: 15px; font-weight: 600; margin-bottom: 4px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; color: #2f3542;}
.info .desc { font-size: 12px; color: #747d8c; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

#siku-container { color: #2c2c2c; font-family: 'KaiTi', 'STKaiti', serif; padding-bottom: 60px; background-color: #e9e4d4; }
.siku-header { text-align: center; margin-bottom: 40px; border-bottom: 2px solid #8b8b8b; padding-bottom: 20px;}
.siku-header h1 { font-size: 2.5em; letter-spacing: 5px; margin-bottom: 10px;}
.gzh-banner { background: rgba(255,255,255,0.4); border: 2px dashed #4a4a4a; padding: 20px; text-align: center; border-radius: 10px; margin-bottom: 30px;}
.book-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; }
.book-card { background: rgba(255,255,255,0.6); border: 1px solid #a3a3a3; padding: 20px; border-radius: 5px; box-shadow: 3px 3px 10px rgba(0,0,0,0.1); text-align: center; transition: 0.3s;}
.book-card:hover { transform: translateY(-5px); background: rgba(255,255,255,0.9); }
.book-card h3 { font-size: 1.8em; margin-top: 0; border-bottom: 1px solid #ccc; padding-bottom: 10px;}
.book-card p { font-size: 1.2em; line-height: 1.5;}

#message-container { color: #333; max-width: 900px; margin: 0 auto; padding-bottom: 60px;}
.msg-board-title { font-size: 24px; border-bottom: 2px solid #3498db; padding-bottom: 10px; margin-bottom: 20px; margin-top: 20px; }
.btn-submit { background: var(--primary-color); color: #fff; border: none; padding: 12px 30px; border-radius: 6px; cursor: pointer; font-size: 16px; font-weight: bold; transition: 0.2s;}
.btn-submit:hover { background: #2980b9; transform: translateY(-2px); box-shadow: 0 5px 15px rgba(52, 152, 219, 0.4);}