/* 我还在 - 主样式表 (移动端APP风格) */
*{margin:0;padding:0;box-sizing:border-box}
:root{
    --primary:#1a73e8;
    --primary-dark:#1557b0;
    --bg:#f5f6fa;
    --card:#fff;
    --text:#1a1a2e;
    --text2:#636e72;
    --text3:#b2bec3;
    --border:#e9ecef;
    --danger:#e74c3c;
    --success:#00b894;
    --warning:#fdcb6e;
    --shadow:0 2px 12px rgba(0,0,0,.06);
    --radius:12px;
    --radius-sm:8px;
    --nav-h:56px;
    --tab-h:50px;
    --safe-bottom:env(safe-area-inset-bottom, 0px);
}
body{
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
    background:var(--bg);
    color:var(--text);
    line-height:1.6;
    -webkit-font-smoothing:antialiased;
    -webkit-tap-highlight-color:transparent;
    overscroll-behavior:none;
    min-height:100vh;
    min-height:100dvh;
}
a{color:var(--primary);text-decoration:none}
img{max-width:100%;height:auto}
input,textarea,button,select{font-family:inherit;font-size:15px;outline:none}
button{cursor:pointer;border:none;background:none}

/* 顶部导航 */
.top-nav{
    position:sticky;top:0;z-index:100;
    background:var(--card);
    border-bottom:1px solid var(--border);
    padding:0 16px;
    height:var(--nav-h);
    display:flex;align-items:center;justify-content:space-between;
    backdrop-filter:blur(10px);
    -webkit-backdrop-filter:blur(10px);
}
.top-nav h1{font-size:18px;font-weight:700}
.top-nav .nav-right{display:flex;align-items:center;gap:8px}
.top-nav .nav-btn{
    padding:6px 12px;
    border-radius:20px;
    font-size:13px;
    font-weight:500;
    transition:background .2s;
}
.top-nav .nav-btn:hover{background:var(--bg)}
.top-nav .nav-btn.primary{
    background:var(--primary);color:#fff;
}
.top-nav .nav-btn.primary:hover{background:var(--primary-dark)}
.top-nav .nav-btn.member{background:#07c160;color:#fff;font-weight:600}
.top-nav .nav-btn.member:hover{background:#06ad56}

/* 语言切换 */
.lang-switch{position:relative}
.lang-current{
    display:flex;align-items:center;gap:4px;
    padding:6px 10px;border-radius:20px;
    font-size:13px;font-weight:500;
    background:var(--bg);color:var(--text);
}
.lang-dropdown{
    display:none;position:absolute;top:100%;right:0;margin-top:4px;
    background:var(--card);border-radius:var(--radius-sm);
    box-shadow:0 4px 20px rgba(0,0,0,.12);
    min-width:140px;overflow:hidden;z-index:200;
}
.lang-dropdown.show{display:block}
.lang-dropdown a{
    display:block;padding:10px 16px;font-size:14px;
    color:var(--text);transition:background .15s;
}
.lang-dropdown a:hover{background:var(--bg)}
.lang-dropdown a.active{color:var(--primary);font-weight:600;background:#e8f0fe}

/* 主要内容区 */
.main-content{
    padding:12px 16px;
    padding-bottom:calc(var(--tab-h) + var(--safe-bottom) + 20px);
    max-width:640px;margin:0 auto;
    min-height:calc(100vh - var(--nav-h) - var(--tab-h));
}

/* 底部导航 */
.bottom-nav{
    position:fixed;bottom:0;left:0;right:0;z-index:100;
    background:var(--card);
    border-top:1px solid var(--border);
    display:flex;align-items:center;
    height:var(--tab-h);
    padding-bottom:var(--safe-bottom);
}
.bottom-nav .tab{
    flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
    font-size:11px;color:var(--text3);gap:2px;
    transition:color .2s;padding:4px 0;
}
.bottom-nav .tab svg{width:22px;height:22px}
.bottom-nav .tab.active{color:var(--primary)}
.bottom-nav .tab .badge{
    position:absolute;top:2px;margin-left:14px;
    background:var(--danger);color:#fff;font-size:10px;
    min-width:16px;height:16px;border-radius:8px;
    display:flex;align-items:center;justify-content:center;
}

/* 卡片 */
.card{
    background:var(--card);border-radius:var(--radius);
    padding:16px;margin-bottom:12px;
    box-shadow:var(--shadow);border:1px solid var(--border);
}

/* 发布框 */
.post-box{
    display:flex;gap:12px;align-items:flex-start;
}
.post-box .avatar{
    width:40px;height:40px;border-radius:50%;flex-shrink:0;
    object-fit:cover;background:var(--bg);
}
.post-box textarea{
    flex:1;border:none;resize:none;font-size:15px;
    min-height:44px;padding:8px 0;background:transparent;
    color:var(--text);
}
.post-box textarea::placeholder{color:var(--text3)}
.post-box-actions{
    display:flex;align-items:center;justify-content:space-between;
    margin-top:8px;padding-top:8px;border-top:1px solid var(--border);
}
.post-box-actions .left{display:flex;gap:4px}
.post-box-actions .btn-icon{
    padding:8px 12px;border-radius:20px;font-size:13px;
    color:var(--text2);transition:background .2s;
}
.post-box-actions .btn-icon:hover{background:var(--bg)}
.post-box-actions .btn-primary{
    padding:8px 20px;border-radius:20px;
    background:var(--primary);color:#fff;font-size:14px;font-weight:600;
    transition:opacity .2s;
}
.post-box-actions .btn-primary:disabled{opacity:.5}
.post-images-preview{display:flex;gap:8px;margin-top:8px;flex-wrap:wrap}
.post-images-preview img{width:80px;height:80px;border-radius:var(--radius-sm);object-fit:cover}

/* 动态卡片 */
.post-card{padding:14px 16px}
.post-card .post-header{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.post-card .post-avatar{width:40px;height:40px;border-radius:50%;object-fit:cover}
.post-card .post-user{flex:1;min-width:0}
.post-card .post-username{font-weight:600;font-size:15px;display:flex;align-items:center;gap:6px}
.post-card .post-username .did{font-size:12px;color:var(--text3);font-weight:400}
.post-card .post-time{font-size:12px;color:var(--text3)}
.post-card .post-content{font-size:15px;line-height:1.7;margin-bottom:10px;word-break:break-word}
.post-card .post-content .hashtag{color:var(--primary)}
.post-card .post-images{display:grid;grid-template-columns:repeat(3,1fr);gap:4px;margin-bottom:10px;border-radius:var(--radius-sm);overflow:hidden}
.post-card .post-images img{width:100%;aspect-ratio:1;object-fit:cover;cursor:pointer}
.post-card .post-images.single{grid-template-columns:1fr}
.post-card .post-images.single img{aspect-ratio:auto;max-height:360px}
.post-card .post-mood{display:inline-flex;align-items:center;gap:4px;font-size:13px;color:var(--text2);margin-bottom:8px}
.post-card .post-actions{display:flex;gap:24px;padding-top:8px;border-top:1px solid var(--border)}
.post-card .post-actions .action{display:flex;align-items:center;gap:4px;font-size:13px;color:var(--text3);transition:color .2s}
.post-card .post-actions .action.liked{color:var(--danger)}
.post-card .post-actions .action svg{width:18px;height:18px}

/* 注册/登录页 */
.auth-page{
    min-height:100vh;display:flex;flex-direction:column;
    background:var(--card);
}
.auth-header{
    text-align:center;padding:40px 20px 20px;
}
.auth-header .logo{font-size:48px;margin-bottom:12px}
.auth-header h1{font-size:24px;font-weight:700;margin-bottom:4px}
.auth-header p{color:var(--text2);font-size:14px}
.auth-form{padding:0 20px 30px;max-width:400px;margin:0 auto;width:100%}
.auth-form .form-group{margin-bottom:16px}
.auth-form label{display:block;font-size:13px;font-weight:500;color:var(--text2);margin-bottom:6px}
.auth-form input[type="text"],
.auth-form input[type="password"],
.auth-form input[type="email"]{
    width:100%;padding:12px 16px;border:1.5px solid var(--border);
    border-radius:var(--radius-sm);font-size:15px;
    transition:border-color .2s;background:var(--bg);
}
.auth-form input:focus{border-color:var(--primary);background:var(--card)}
.auth-form .captcha-row{display:flex;gap:10px}
.auth-form .captcha-row input{flex:1}
.auth-form .captcha-row img{height:42px;border-radius:var(--radius-sm);cursor:pointer;border:1px solid var(--border)}
.auth-form .btn-submit{
    width:100%;padding:14px;background:var(--primary);color:#fff;
    border-radius:var(--radius-sm);font-size:16px;font-weight:600;
    margin-top:8px;transition:opacity .2s;
}
.auth-form .btn-submit:disabled{opacity:.6}
.auth-form .auth-footer{text-align:center;margin-top:16px;font-size:14px;color:var(--text2)}
.auth-form .auth-footer a{font-weight:600}
.auth-form .error-msg{color:var(--danger);font-size:13px;margin-top:4px;display:none}

/* UID选择 */
.uid-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:12px 0}
.uid-item{
    padding:10px 8px;text-align:center;border:1.5px solid var(--border);
    border-radius:var(--radius-sm);font-size:14px;font-weight:600;
    cursor:pointer;transition:all .2s;background:var(--bg);
}
.uid-item:hover{border-color:var(--primary)}
.uid-item.selected{border-color:var(--primary);background:#e8f0fe;color:var(--primary)}
.uid-refresh{text-align:center;margin-bottom:8px}
.uid-refresh button{font-size:13px;color:var(--primary);padding:4px 12px;border-radius:20px}

/* 个人主页 */
.profile-header{
    text-align:center;padding:20px 0;
}
.profile-cover{
    height:140px;background:linear-gradient(135deg,#667eea,#764ba2);
    border-radius:var(--radius) var(--radius) 0 0;
    position:relative;
}
.profile-avatar{
    width:80px;height:80px;border-radius:50%;border:3px solid var(--card);
    margin:-40px auto 10px;position:relative;z-index:1;
    object-fit:cover;background:var(--card);
}
.profile-name{font-size:20px;font-weight:700}
.profile-did{font-size:13px;color:var(--text2);margin:2px 0}
.profile-bio{font-size:14px;color:var(--text2);margin:6px 0;padding:0 20px}
.profile-stats{display:flex;justify-content:center;gap:24px;margin:16px 0}
.profile-stat{text-align:center}
.profile-stat .num{font-size:18px;font-weight:700}
.profile-stat .label{font-size:12px;color:var(--text3)}
.profile-actions{display:flex;gap:8px;justify-content:center}
.profile-actions .btn{
    padding:8px 24px;border-radius:20px;font-size:14px;font-weight:600;
    transition:all .2s;
}
.btn-follow{background:var(--primary);color:#fff}
.btn-follow.following{background:var(--bg);color:var(--text);border:1px solid var(--border)}
.btn-friend{background:var(--success);color:#fff}
.btn-msg{background:var(--bg);color:var(--text);border:1px solid var(--border)}
.btn-edit{background:var(--bg);color:var(--text);border:1px solid var(--border)}

/* 设置页 */
.settings-section{margin-bottom:20px}
.settings-section h3{font-size:13px;color:var(--text3);text-transform:uppercase;margin-bottom:8px;padding:0 4px}
.settings-item{
    display:flex;align-items:center;justify-content:space-between;
    padding:14px 16px;background:var(--card);border:1px solid var(--border);
    cursor:pointer;transition:background .15s;
}
.settings-item:first-of-type{border-radius:var(--radius-sm) var(--radius-sm) 0 0}
.settings-item:last-of-type{border-radius:0 0 var(--radius-sm) var(--radius-sm)}
.settings-item:only-of-type{border-radius:var(--radius-sm)}
.settings-item:hover{background:var(--bg)}
.settings-item + .settings-item{border-top:none}
.settings-item .left{display:flex;align-items:center;gap:10px;font-size:15px}
.settings-item .right{color:var(--text3);font-size:13px;display:flex;align-items:center;gap:6px}
.settings-item svg{width:20px;height:20px}

/* 通知 */
.notif-item{display:flex;gap:12px;padding:14px 16px;border-bottom:1px solid var(--border);cursor:pointer;transition:background .15s}
.notif-item:hover{background:var(--bg)}
.notif-item.unread{background:#e8f0fe}
.notif-item .notif-avatar{width:40px;height:40px;border-radius:50%;flex-shrink:0}
.notif-item .notif-content{flex:1;min-width:0}
.notif-item .notif-text{font-size:14px;line-height:1.5}
.notif-item .notif-time{font-size:12px;color:var(--text3);margin-top:2px}

/* 搜索 */
.search-bar{position:sticky;top:var(--nav-h);z-index:50;background:var(--bg);padding:8px 0}
.search-bar input{
    width:100%;padding:10px 16px;border:1.5px solid var(--border);
    border-radius:24px;font-size:15px;background:var(--card);
    transition:border-color .2s;
}
.search-bar input:focus{border-color:var(--primary)}

/* 好友列表 */
.friend-item{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--border)}
.friend-item .avatar{width:48px;height:48px;border-radius:50%;object-fit:cover}
.friend-item .info{flex:1;min-width:0}
.friend-item .name{font-weight:600;font-size:15px;display:flex;align-items:center;gap:6px}
.friend-item .did{font-size:12px;color:var(--text3)}
.friend-item .bio{font-size:13px;color:var(--text2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.friend-item .online-dot{width:8px;height:8px;border-radius:50%;background:var(--success);flex-shrink:0}

/* 添加好友栏 */
.add-friend-bar{display:flex;gap:8px;align-items:center}
.add-friend-bar input{flex:1;min-width:0}

/* 弹窗/模态框 */
.modal-overlay{
    display:none;position:fixed;inset:0;z-index:300;
    background:rgba(0,0,0,.5);align-items:center;justify-content:center;
}
.modal-overlay.show{display:flex}
.modal{
    background:var(--card);border-radius:var(--radius);
    width:90%;max-width:400px;max-height:80vh;overflow-y:auto;
    padding:24px;box-shadow:0 8px 40px rgba(0,0,0,.15);
}
.modal h3{font-size:18px;margin-bottom:16px}
.modal .modal-close{
    float:right;font-size:24px;color:var(--text3);cursor:pointer;
    line-height:1;padding:0 4px;
}

/* Toast */
.toast{
    position:fixed;top:20px;left:50%;transform:translateX(-50%);z-index:400;
    padding:10px 24px;border-radius:20px;font-size:14px;font-weight:500;
    color:#fff;background:rgba(0,0,0,.8);
    pointer-events:none;opacity:0;transition:opacity .3s;
}
.toast.show{opacity:1}
.toast.success{background:var(--success)}
.toast.error{background:var(--danger)}

/* 空状态 */
.empty-state{
    text-align:center;padding:60px 20px;color:var(--text3);
}
.empty-state svg{width:60px;height:60px;margin-bottom:12px;opacity:.4}
.empty-state p{font-size:14px}

/* 加载动画 */
.spinner{
    display:inline-block;width:20px;height:20px;border:2px solid var(--border);
    border-top-color:var(--primary);border-radius:50%;animation:spin .6s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}

/* ===== 移动端全面优化（APP/小程序级：手机/平板/安卓/鸿蒙/微信内置浏览器）===== */
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{-webkit-overflow-scrolling:touch}
img,svg{-webkit-user-drag:none}
/* 触控目标≥44px（iOS HIG/安卓规范），输入框字号≥16px防iOS聚焦自动放大 —— 仅触屏设备生效，PC端不强制 */
@media (hover: none) and (pointer: coarse) {
    input[type=text],input[type=password],input[type=email],input[type=number],
    input[type=search],input[type=tel],input[type=url],select,textarea{min-height:44px;font-size:16px}
    button,.btn,a.nav-btn{min-height:44px}
}
button,a,label{-webkit-touch-callout:none;-webkit-user-select:none;user-select:none}
input,textarea{-webkit-user-select:text;user-select:text}

/* 响应式 */
@media (max-width:768px){
    .nav-btn.member{display:none}
    /* 弹窗改为底部抽屉（APP/小程序风格） */
    .modal-overlay{align-items:flex-end;background:rgba(0,0,0,.55);padding:0}
    .modal{width:100%;max-width:100%;max-height:82vh;border-radius:18px 18px 0 0;
        margin:0;padding:20px 18px calc(24px + env(safe-area-inset-bottom,0px));
        animation:sheetUp .25s ease}
    /* 表格横向滚动兜底，不摔破布局 */
    .table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
    table{max-width:100%}
}
@keyframes sheetUp{from{transform:translateY(40px);opacity:.6}to{transform:none;opacity:1}}
/* ===== 移动端安全区域（刘海屏/挖孔屏适配） ===== */
body {
    padding-top: env(safe-area-inset-top, 0px);
    padding-bottom: env(safe-area-inset-bottom, 0px);
    padding-left: env(safe-area-inset-left, 0px);
    padding-right: env(safe-area-inset-right, 0px);
}
/* 固定定位元素的安全区域 */
.top-nav, .settings-topbar, .mobile-page-top {
    padding-top: calc(env(safe-area-inset-top, 0px) + 8px);
}
.bottom-nav {
    padding-bottom: env(safe-area-inset-bottom, 0px);
}
/* 移除点击高亮（iOS/Android） */
* {
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
}
/* 允许文本选择 */
input, textarea, [contenteditable] {
    -webkit-user-select: text;
    user-select: text;
}
/* iOS 平滑滚动 */
@supports (-webkit-overflow-scrolling: touch) {
    .settings-sidebar, .content-area, .table-wrap {
        -webkit-overflow-scrolling: touch;
    }
}
/* 防止iOS橡皮筋效果导致的页面下拉 */
html.has-layout {
    overscroll-behavior-y: contain;
    position: fixed;
    width: 100%;
    height: 100%;
}
html.has-layout body {
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}
/* 移动端卡片和按钮增强 */
@media (max-width: 768px) {
    /* 卡片间距优化 */
    .card, .content-card {
        margin-bottom: 12px;
        border-radius: 12px;
    }
    /* 表单元素增强 */
    input, select, textarea {
        font-size: 16px !important; /* 防止iOS自动缩放 */
    }
    /* 按钮最小触摸区域 */
    .btn-submit, .btn, button[type="submit"] {
        min-height: 44px;
        padding: 10px 20px;
    }
    /* 折叠屏适配 */
    @media (min-width: 600px) and (max-width: 768px) {
        .settings-layout { gap: 16px; }
    }
}
/* 平板横屏适配 */
@media (min-width: 769px) and (max-width: 1024px) {
    .settings-layout { gap: 20px; }
    :root { --sidebar-w: 220px; }
}
@media (min-width:768px){
    .main-content{max-width:640px;margin:0 auto}
    .top-nav{max-width:100%}
    .bottom-nav{max-width:640px;left:50%;transform:translateX(-50%);border-radius:var(--radius) var(--radius) 0 0}
}
@media (min-width:1024px){
    .main-content{max-width:680px}
    body{background:#e8ecf1}
}

/* 维护模式 */
.maintenance{
    display:flex;flex-direction:column;align-items:center;
    justify-content:center;min-height:100vh;text-align:center;padding:20px;
}
.maintenance h1{font-size:28px;margin:16px 0}
.maintenance p{color:var(--text2);font-size:15px}

/* 评论区 */
.comments-section{margin-top:12px}
.comment-item{display:flex;gap:10px;padding:10px 0;border-bottom:1px solid var(--border)}
.comment-item .comment-avatar{width:32px;height:32px;border-radius:50%;flex-shrink:0}
.comment-item .comment-body{flex:1;min-width:0}
.comment-item .comment-user{font-weight:600;font-size:13px}
.comment-item .comment-text{font-size:14px;margin:2px 0}
.comment-item .comment-time{font-size:11px;color:var(--text3)}
.comment-input{display:flex;gap:8px;margin-top:12px}
.comment-input input{flex:1;padding:10px 14px;border:1.5px solid var(--border);border-radius:20px;font-size:14px}
.comment-input button{padding:8px 16px;background:var(--primary);color:#fff;border-radius:20px;font-size:14px;font-weight:500}

/* 签到 */
.checkin-card{text-align:center;padding:20px}
.checkin-card .streak{font-size:48px;font-weight:700;color:var(--primary)}
.checkin-card .label{font-size:14px;color:var(--text2);margin:4px 0}
.checkin-card .btn-checkin{padding:10px 32px;border-radius:24px;font-size:15px;font-weight:600;margin-top:10px;background:var(--primary);color:#fff}
.checkin-card .btn-checkin:disabled{background:var(--border);color:var(--text3);cursor:default}

/* 管理后台 */
.admin-layout{display:flex;min-height:100vh}
.admin-sidebar{width:220px;background:#1a1a2e;color:#fff;padding:20px 0;flex-shrink:0}
.admin-sidebar .logo{padding:0 20px 20px;font-size:18px;font-weight:700;border-bottom:1px solid rgba(255,255,255,.1)}
.admin-sidebar a{display:block;padding:12px 20px;color:rgba(255,255,255,.7);font-size:14px;transition:all .2s}
.admin-sidebar a:hover,.admin-sidebar a.active{color:#fff;background:rgba(255,255,255,.1)}
.admin-main{flex:1;padding:24px;background:var(--bg);overflow-y:auto}
.admin-card{background:var(--card);border-radius:var(--radius);padding:20px;margin-bottom:16px;box-shadow:var(--shadow)}
.admin-table{width:100%;border-collapse:collapse}
.admin-table th{text-align:left;padding:10px 12px;font-size:13px;color:var(--text2);border-bottom:2px solid var(--border)}
.admin-table td{padding:10px 12px;font-size:14px;border-bottom:1px solid var(--border)}
.admin-table tr:hover{background:var(--bg)}
.admin-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-bottom:20px}
.admin-stat{background:var(--card);border-radius:var(--radius);padding:20px;text-align:center;box-shadow:var(--shadow)}
.admin-stat .num{font-size:28px;font-weight:700;color:var(--primary)}
.admin-stat .label{font-size:13px;color:var(--text2);margin-top:4px}