* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}
.container { max-width: 900px; margin: 0 auto; padding: 20px; }
header {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    padding: 20px 30px;
    border-radius: 12px;
    margin-bottom: 20px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
header h1 { color: #5a67d8; font-size: 24px; }
.user-info { font-size: 14px; color: #666; }
.user-info button {
    margin-left: 10px;
    padding: 6px 14px;
    background: #e53e3e;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
}
.card {
    background: white;
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
}
.card h2 { color: #5a67d8; margin-bottom: 16px; font-size: 18px; }
.form-group { margin-bottom: 14px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 600; font-size: 14px; }
.form-group input, .form-group textarea, .form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
}
.form-group textarea { min-height: 100px; resize: vertical; }
button.btn {
    background: #5a67d8;
    color: white;
    padding: 10px 24px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: background 0.2s;
}
button.btn:hover { background: #4c51bf; }
button.btn.secondary { background: #e0e7ff; color: #4c51bf; }
button.btn.secondary:hover { background: #c7d2fe; }
.auth-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}
.auth-tabs button {
    flex: 1;
    padding: 10px;
    background: #edf2f7;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    color: #4a5568;
}
.auth-tabs button.active { background: #5a67d8; color: white; }

/* ===== 登录页双栏布局（批次92）：左侧常驻扫码 / 右侧表单（百度网盘、阿里云式） ===== */
.auth-split { display: flex; padding: 0; overflow: hidden; }
.auth-qr-side {
    flex: 0 0 270px;
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    padding: 28px 20px;
    border-right: 1px solid #e2e8f0;
    background: #f8fafc;
    text-align: center;
}
.auth-qr-title { font-size: 15px; font-weight: 600; color: #2d3748; margin-bottom: 12px; }
.auth-qr-side #qrLoginBox {
    display: flex; justify-content: center; align-items: center;
    min-height: 190px; min-width: 190px; margin: 4px 0;
    background: #fff; border: 1px solid #e2e8f0; border-radius: 12px; padding: 10px;
}
.auth-qr-side #qrLoginMsg { font-size: 13px; color: #718096; min-height: 18px; margin-bottom: 10px; line-height: 1.6; }
.auth-qr-refresh { width: auto; }
.auth-qr-hint { font-size: 12px; color: #a0aec0; margin-top: 10px; line-height: 1.6; }
.auth-form-side { flex: 1; min-width: 0; padding: 24px 28px; }
/* 手机端：二维码栏隐藏（手机本身就是被扫端），表单占满 */
@media (max-width: 768px) {
    .auth-split { display: block; }
    .auth-qr-side { display: none; }
    .auth-form-side { padding: 18px 16px; }
    .auth-tabs { flex-wrap: wrap; }
    .auth-tabs button { flex: 1 1 45%; }
}
.post-item {
    border-bottom: 1px solid #eee;
    padding: 16px 0;
}
.post-item:last-child { border-bottom: none; }
.post-item .meta { font-size: 12px; color: #718096; margin-bottom: 6px; }
.post-item .content { font-size: 15px; line-height: 1.6; margin-bottom: 8px; }
.post-item .tags { display: inline-block; background: #edf2f7; color: #4a5568; padding: 2px 8px; border-radius: 4px; font-size: 12px; margin-right: 6px; }
.stance { display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 11px; font-weight: 600; }
.stance-SP { background: #c6f6d5; color: #22543d; }
.stance-LP { background: #bee3f8; color: #2a4365; }
.stance-N { background: #e2e8f0; color: #2d3748; }
.stance-Q { background: #fefcbf; color: #744210; }
.stance-SC { background: #fed7d7; color: #742a2a; }
.stance-LC { background: #feebc8; color: #7b341e; }
.hidden { display: none; }
.alert {
    padding: 10px 14px;
    border-radius: 8px;
    margin-bottom: 14px;
    font-size: 14px;
}
.alert-error { background: #fed7d7; color: #742a2a; }
.alert-success { background: #c6f6d5; color: #22543d; }
.search-bar { display: flex; gap: 10px; margin-bottom: 16px; }
.search-bar input { flex: 1; padding: 10px; border: 1px solid #ddd; border-radius: 8px; font-size: 14px; }
.empty { text-align: center; color: #a0aec0; padding: 40px; }
.actions { display: flex; gap: 8px; margin-top: 10px; }
.actions button { padding: 4px 12px; font-size: 12px; }
nav.nav-bar {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    padding: 12px 30px;
    border-radius: 12px;
    margin-bottom: 20px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}
nav.nav-bar a {
    color: #5a67d8;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: 8px;
    transition: background 0.2s;
}
nav.nav-bar a:hover { background: #edf2f7; }
nav.nav-bar a.active { background: #5a67d8; color: white; }

/* ===== 圆形头像（导航 36px / 个人中心 64px 共用，尺寸由内联 style 指定） ===== */
.mp-avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    overflow: hidden;
    color: #fff;
    font-weight: 600;
    user-select: none;
    flex: 0 0 auto;
}
.mp-avatar img { width: 100%; height: 100%; object-fit: cover; }

/* ===== 头像框（个人中心可选：gold 金色圈=会员专属 / purple 紫 / green 绿；套在 .mp-avatar/.friend-avatar 等圆形头像上） ===== */
.mp-frame-gold { border: 3px solid #f6c945 !important; box-shadow: 0 0 8px rgba(246,201,69,.85), 0 0 2px rgba(246,201,69,.6) !important; }
.mp-frame-purple { border: 3px solid #9f7aea !important; box-shadow: 0 0 8px rgba(159,122,234,.8), 0 0 2px rgba(159,122,234,.6) !important; }
.mp-frame-green { border: 3px solid #48bb78 !important; box-shadow: 0 0 8px rgba(72,187,120,.8), 0 0 2px rgba(72,187,120,.6) !important; }

/* ===== 导航头像 + 下拉菜单（结构与 mindmap 顶栏下拉一致：.open 控制显隐） ===== */
.nav-user { position: relative; margin-left: auto; display: flex; align-items: center; }
.nav-avatar { cursor: pointer; border: 2px solid transparent; border-radius: 50%; transition: border-color 0.2s; display: inline-flex; }
.nav-avatar:hover { border-color: #c3dafe; }
.nav-avatar.active { border-color: #5a67d8; }
.nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 8px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.18);
    min-width: 180px;
    overflow: hidden;
    z-index: 3000;
}
.nav-menu.open { display: block; }
.nav-menu .nm-header { padding: 12px 16px 10px; }
.nav-menu .nm-name { font-size: 14px; font-weight: 600; color: #2d3748; }
.nav-menu .nm-sub { font-size: 12px; color: #a0aec0; margin-top: 2px; }
.nav-menu .nm-sep { height: 1px; background: #edf2f7; }
.nav-menu .nm-item { display: block; padding: 10px 16px; font-size: 14px; color: #4a5568; cursor: pointer; text-decoration: none; }
.nav-menu .nm-item:hover { background: #f7fafc; }
.nav-menu .nm-item.danger { color: #e53e3e; }
.nav-menu .nm-item.danger:hover { background: #fff5f5; }

/* ===== 分享口令识别（share-detect.js）：可拖动浮动按钮 + 检测卡片 + 提示 toast ===== */
/* mindmap.html 未引本文件，share-detect.js 会在该页自动注入同一份样式（FALLBACK_CSS，需与这里保持一致） */
/* 按钮可随意拖动（pointer 事件统一鼠标/触屏），位置存 localStorage；卡片/toast 自动出现在按钮上方 */
.share-detect-btn { position: fixed; right: 16px; bottom: 96px; z-index: 6000; padding: 9px 16px; border: none; border-radius: 20px; background: #5a67d8; color: #fff; font-size: 13px; font-weight: 600; cursor: pointer; box-shadow: 0 4px 14px rgba(0,0,0,0.25); touch-action: none; user-select: none; -webkit-user-select: none; }
.share-detect-btn:hover { background: #4c51bf; }
.share-detect-btn.sd-dragging { opacity: .8; box-shadow: 0 6px 18px rgba(0,0,0,0.35); }
.share-detect-card { position: fixed; left: 16px; top: 60%; z-index: 6001; display: flex; align-items: center; gap: 10px; max-width: 90vw; padding: 12px 16px; background: #fff; border-radius: 12px; box-shadow: 0 8px 30px rgba(0,0,0,0.28); font-size: 14px; color: #2d3748; cursor: pointer; }
.share-detect-card:hover { background: #f7fafc; }
.share-detect-card .sd-close { flex: none; border: none; background: none; font-size: 15px; color: #a0aec0; cursor: pointer; padding: 2px 4px; }
.share-detect-card .sd-close:hover { color: #4a5568; }
.share-detect-toast { position: fixed; left: 16px; top: 56%; z-index: 6002; padding: 9px 18px; background: rgba(45,55,72,0.92); color: #fff; font-size: 13px; border-radius: 8px; pointer-events: none; }

/* ===== 移动端适配（≤768px）：全局尺寸/触控目标，不影响桌面规则 ===== */
@media (max-width: 768px) {
    .container { padding: 12px; }
    header { padding: 14px 16px; margin-bottom: 14px; }
    header h1 { font-size: 19px; }
    .card { padding: 16px; margin-bottom: 14px; }
    .card h2 { font-size: 17px; }
    /* 输入框 16px 防止 iOS 聚焦时自动放大页面 */
    .form-group input, .form-group textarea, .form-group select { font-size: 16px; padding: 12px 10px; }
    .search-bar input { font-size: 16px; }
    /* 触控目标 ≥36px */
    button.btn { min-height: 44px; }
    .actions button { padding: 8px 14px; min-height: 36px; }
    nav.nav-bar { padding: 10px 12px; gap: 8px; }
    nav.nav-bar a { padding: 10px 14px; }

    /* --- index.html：登录/注册卡片全宽，主操作整行 --- */
    #authSection button.btn { width: 100%; }
    .auth-tabs button { padding: 12px 10px; min-height: 44px; }
    /* index.html：功能入口网格强制 2 列（覆盖卡片上的内联 grid/padding） */
    #mainSection .card { padding: 28px 16px !important; }
    #mainSection .card > div { grid-template-columns: repeat(2, 1fr) !important; gap: 12px !important; }
    #mainSection .card > div a { padding: 22px 8px !important; font-size: 15px !important; }

    /* --- post.html：编辑器全宽、发布按钮整行 --- */
    #publishCard button.btn { width: 100%; }
    #postContent { min-height: 150px; }
    #detailCard .btn { margin-top: 10px; }
}


/* ===== 专家金色 V 徽章（role==1 认证专家：圆形金底白 V「大 V」标识，区别于会员💎） ===== */
.expert-v-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: linear-gradient(135deg, #ffd76e 0%, #e6a817 100%);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    line-height: 16px;
    margin-left: 4px;
    vertical-align: 2px;
    text-shadow: 0 1px 1px rgba(0,0,0,0.2);
    box-shadow: 0 1px 2px rgba(0,0,0,0.15);
    user-select: none;
    flex: 0 0 auto;
}

/* ===== 相近推荐块（post-similar.js：发布成功后/文章详情底部） ===== */
.similar-box { margin-top: 14px; border-top: 1px dashed #e2e8f0; padding-top: 12px; }
.similar-title { font-size: 14px; font-weight: 600; color: #2d3748; margin-bottom: 2px; }
.similar-sub { font-size: 12px; color: #a0aec0; margin-bottom: 10px; }
.similar-item { padding: 8px 10px; border-radius: 8px; background: #f7fafc; margin-bottom: 8px; }
.similar-item:hover { background: #edf2f7; }
.similar-item .si-title { font-size: 14px; color: #2d3748; font-weight: 600; cursor: pointer; }
.similar-item .si-title:hover { color: #5a67d8; }
.similar-item .si-meta { font-size: 12px; color: #718096; margin-top: 3px; }
.similar-item .si-snippet { font-size: 13px; color: #4a5568; margin-top: 4px; line-height: 1.5; }

/* ===== 个人名片弹窗（user-card.js）：遮罩 + 居中卡片，遮罩/Esc/✕ 关闭 ===== */
.uc-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.55);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 16px;
}
.uc-overlay.show { display: flex; }
.uc-card {
    position: relative;
    background: #fff;
    border-radius: 16px;
    padding: 28px 24px 20px;
    width: 100%;
    max-width: 360px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    animation: ucFadeIn 0.25s ease;
}
@keyframes ucFadeIn { from { opacity: 0; transform: scale(0.92); } to { opacity: 1; transform: scale(1); } }
.uc-close {
    position: absolute;
    top: 10px;
    right: 12px;
    border: none;
    background: none;
    font-size: 16px;
    color: #a0aec0;
    cursor: pointer;
    padding: 4px 6px;
}
.uc-close:hover { color: #4a5568; }
.uc-loading { text-align: center; color: #718096; padding: 30px 0; font-size: 14px; }
.uc-head { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.uc-head-meta { min-width: 0; }
.uc-name { font-size: 18px; font-weight: 700; color: #2d3748; display: flex; align-items: center; }
.uc-member-badge { margin-left: 4px; font-size: 15px; }
.uc-since { font-size: 12px; color: #a0aec0; margin-top: 4px; }
.uc-bio {
    font-size: 14px;
    color: #4a5568;
    line-height: 1.6;
    background: #f7fafc;
    border-radius: 10px;
    padding: 12px 14px;
    margin-bottom: 14px;
    white-space: pre-wrap;
    word-break: break-word;
    max-height: 160px;
    overflow-y: auto;
}
.uc-bio-empty { color: #a0aec0; }
.uc-stats {
    display: flex;
    gap: 18px;
    font-size: 13px;
    color: #718096;
    margin-bottom: 16px;
}
.uc-stats strong { color: #5a67d8; }
.uc-actions { text-align: center; }
.uc-btn {
    padding: 10px 28px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    background: #fff;
    color: #718096;
    font-size: 14px;
    cursor: pointer;
}
.uc-btn.primary { background: #5a67d8; border-color: #5a67d8; color: #fff; font-weight: 600; }
.uc-btn:disabled { opacity: 0.6; cursor: default; }
.uc-self-hint { font-size: 13px; color: #a0aec0; }

/* 可点击的作者名（名片落点）：默认与正文同色，悬停提示可点 */
.author-link { cursor: pointer; }
.author-link:hover { color: #5a67d8; text-decoration: underline; }

/* ===== 全站简笔画图标（js/app-icons.js 注入的 stroke SVG：简洁线条、单色系，颜色随 currentColor） ===== */
.app-icon { width: 20px; height: 20px; stroke: currentColor; fill: none; stroke-width: 1.5; vertical-align: -4px; }
/* 按钮/链接内随字号缩放（顶栏/聊天/个人中心按钮为 12~14px 字，图标约 16~18px；底部导航在 app-bottombar.js 里覆盖回 24px） */
button .app-icon, a .app-icon { width: 1.3em; height: 1.3em; vertical-align: -0.22em; }

/* ===== Quill 中文字体（发布页字体下拉；class 白名单经 sanitize.js 放行，reader 端无该字体自动回退系统默认） ===== */
.ql-font-simhei { font-family: '黑体', SimHei, sans-serif; }
.ql-font-kaiti { font-family: '楷体', KaiTi, STKaiti, serif; }
.ql-font-simsun { font-family: '宋体', SimSun, serif; }
.ql-font-fangsong { font-family: '仿宋', FangSong, STFangsong, serif; }
.ql-font-yahei { font-family: '微软雅黑', 'Microsoft YaHei', sans-serif; }
/* 工具栏字体下拉显示中文名（默认项 = 默认字体） */
.ql-snow .ql-picker.ql-font .ql-picker-label::before,
.ql-snow .ql-picker.ql-font .ql-picker-item::before { content: '默认字体'; }
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="simhei"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="simhei"]::before { content: '黑体'; font-family: SimHei, sans-serif; }
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="kaiti"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="kaiti"]::before { content: '楷体'; font-family: KaiTi, serif; }
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="simsun"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="simsun"]::before { content: '宋体'; font-family: SimSun, serif; }
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="fangsong"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="fangsong"]::before { content: '仿宋'; font-family: FangSong, serif; }
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="yahei"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="yahei"]::before { content: '微软雅黑'; font-family: 'Microsoft YaHei', sans-serif; }

/* ===== 性能：移动端 backdrop-filter 降档（跨全屏容器的实时模糊是手机 GPU 最大开销之一，10px→5px 观感几乎不变） ===== */
@media (max-width: 768px) {
    header, nav.nav-bar { backdrop-filter: blur(5px); -webkit-backdrop-filter: blur(5px); }
}

/* ===== 性能模式（body.mp-perf，见 js/perf-mode.js：PWA 安装版/低端机自动降级） =====
   关 GPU 大户：全站 backdrop-filter 实时模糊、氛围光团大模糊层、场景/动效层大模糊降档。
   画布底色/主题色不受影响（色彩全保留，只削模糊与滤镜开销）。 */
body.mp-perf, body.mp-perf * {
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
}
/* 氛围光团：3 个 1150px blur(64px) 全屏动画是移动端最大单项 GPU 开销，性能模式整层不渲染（画布底色保留） */
body.mp-perf #ambientBg { display: none !important; }
/* 场景动态背景层：大面积 blur 22~46px 降到 12px（色彩/动画保留，模糊开销降约 85%） */
body.mp-perf #mp-scene-bg > *, body.mp-perf #mp-scene-bg > * > * { filter: blur(12px) !important; }
/* 双璃流光带/暖阳等动效层大模糊降档 */
body.mp-perf #themeFxLayer .fx-band { filter: blur(20px) !important; }
body.mp-perf #themeFxLayer .fx-sun, body.mp-perf #themeFxLayer .fx-dim { filter: none !important; }