/* =========================================
           1. 全局配置 (PC专用)
           ========================================= */
:root {
    --bg-body: #F0FBFB;       /* 登录页背景 */
    --bg-white: #FFFFFF;
    --primary: #15B8B5;       /* 品牌绿 */
    --primary-hover: #109D9A;
    --primary-light: #E8F5E9;
    --accent-orange: #F29D38; /* 待验收/警告色 */
    --accent-red: #D32F2F;
    --text-main: #333333;
    --text-sub: #888888;
    --border: #E0E0E0;
    --shadow: 0 10px 30px rgba(21, 184, 181, 0.15); /* 青色阴影 */
    --container-width: 1200px;  /* 锁定宽度 */
}

body {
    margin: 0; padding: 0;
    min-width: var(--container-width); /* 强制PC最小宽度 */
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    overflow-x: auto;
}

a { text-decoration: none; color: inherit; transition: 0.2s; }
button { cursor: pointer; outline: none; border: none; font-family: inherit; }
ul { list-style: none; padding: 0; margin: 0; }
.wrapper { width: var(--container-width); margin: 0 auto; position: relative; }
.serif { font-family: "Songti SC", "SimSun", "Noto Serif SC", serif; }

/* =========================================
   2. 顶部导航
   ========================================= */
header {
    height: 72px; background: #fff; border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 999;
    box-shadow: 0 2px 10px rgba(0,0,0,0.02);
}
.header-content { height: 100%; display: flex; align-items: center; justify-content: space-between; }
/* Logo与导航链接 */
.left-area { display: flex; align-items: center; gap: 60px; }
.logo { font-size: 24px; font-weight: bold; color: var(--primary); display: flex; align-items: center; gap: 10px; }
.logo span { font-size: 30px; }

.nav { display: flex; gap: 30px; }
.nav a { font-size: 16px; font-weight: 500; color: var(--text-main); position: relative; padding: 24px 0; }
.nav a:hover { color: var(--primary); }
.nav a.active { color: var(--primary); font-weight: bold; }
.nav a.active::after { content: ''; position: absolute; bottom: 0; left: 0; width: 100%; height: 3px; background: var(--primary); }

/* --- 右侧用户区域 --- */
.right-area { display: flex; align-items: center; }

/* 状态A: 未登录 (显示按钮) */
.guest-actions { display: flex; gap: 15px; }
.btn { padding: 8px 20px; border-radius: 4px; font-size: 14px; font-weight: 600; transition: 0.2s; }
.btn-line { border: 1px solid var(--primary); color: var(--primary); background: transparent; }
.btn-line:hover { background: var(--primary-light); }
.btn-fill { background: var(--primary); color: #fff; }
.btn-fill:hover { background: var(--primary-hover); }

/* 状态B: 已登录 (显示头像与消息) */
.user-panel { display: flex; align-items: center; gap: 25px; }

/* 消息铃铛 */
.msg-icon { position: relative; font-size: 20px; color: #666; cursor: pointer; display: flex; align-items: center; }
.msg-icon:hover { color: var(--primary); }
.msg-dot {
    position: absolute; top: -2px; right: -2px;
    width: 8px; height: 8px; background: #FF4D4F; border-radius: 50%; border: 1px solid #fff;
}

/* 用户头像区域 */
.user-dropdown-wrap { position: relative; padding: 20px 0; cursor: pointer; } /* 增加上下padding方便鼠标移动 */
.user-info { display: flex; align-items: center; gap: 10px; }
.avatar { width: 36px; height: 36px; border-radius: 50%; object-fit: cover; border: 1px solid #eee; }
.username { font-size: 14px; font-weight: 500; max-width: 100px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.arrow-down { font-size: 12px; color: #999; transition: 0.3s; }

.user-dropdown-wrap:hover .arrow-down { transform: rotate(180deg); }

/* 下拉菜单 */
.dropdown-menu {
    position: absolute; top: 72px; right: 0; width: 200px;
    background: #fff; border-radius: 8px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    border: 1px solid #eee;
    opacity: 0; visibility: hidden; transform: translateY(10px);
    transition: 0.3s;
    overflow: hidden;
}
.user-dropdown-wrap:hover .dropdown-menu { opacity: 1; visibility: visible; transform: translateY(0); }

/* 角色标签 */
.role-tag-in-menu { padding: 15px 20px; border-bottom: 1px solid #f5f5f5; background: #fafafa; }
.role-tag-in-menu span { background: var(--primary-light); color: var(--primary); padding: 2px 8px; border-radius: 4px; font-size: 12px; font-weight: bold; }

.menu-list a { padding: 12px 20px; font-size: 14px; color: #555; display: flex; align-items: center; gap: 10px; }
.menu-list a:hover { background: #f9f9f9; color: var(--primary); }
.menu-list a.logout { border-top: 1px solid #eee; color: #FF4D4F; }
.menu-list a.logout:hover { background: #FFF1F0; }

/* 底部footer */
footer {
    color: var(--text-main);                /* 深色文字 */
    padding: 60px 0 30px;
    margin-top: 0;
}

.footer-cols { display: flex; justify-content: space-between; margin-bottom: 40px; }
.f-col h4 { font-size: 16px; margin-bottom: 20px; color: var(--primary); font-weight: bold; }
.f-col a { display: block; color: var(--text-sub); margin-bottom: 10px; font-size: 14px; }
.f-col a:hover { color: var(--primary); text-decoration: underline; }

.footer-copy {
    padding-top: 20px;
    text-align: center;
    color: #889;
    font-size: 13px;
}