/* ===== 全局重置 ===== */
* { margin:0; padding:0; box-sizing:border-box; -webkit-tap-highlight-color:transparent; }

:root {
    --primary: #6C63FF; --primary-light: #8B83FF; --primary-dark: #4F47D4;
    --secondary: #FF6584; --secondary-light: #FF85A0;
    --gradient-main: linear-gradient(135deg, #6C63FF 0%, #FF6584 100%);
    --gradient-bg: linear-gradient(145deg, #f0f2ff 0%, #faf0ff 100%);
    --bg: #f5f7ff;
    --card-bg: rgba(255,255,255,0.75);
    --card-border: rgba(255,255,255,0.3);
    --card-shadow: 0 8px 32px rgba(108,99,255,0.10);
    --card-shadow-hover: 0 12px 48px rgba(108,99,255,0.18);
    --text-primary: #1F1A3E; --text-secondary: #5A5580; --text-light: #9A96B8;
    --border-color: rgba(108,99,255,0.08);
    --radius: 20px; --radius-sm: 12px; --radius-xs: 8px;
    --nav-height: 70px; --header-height: 56px; --safe-bottom: env(safe-area-inset-bottom,0px);
    --transition: all 0.35s cubic-bezier(0.4,0,0.2,1);
    --max-width: 480px;
    --glass-bg: rgba(255,255,255,0.60);
    --glass-border: rgba(255,255,255,0.25);
}
[data-theme="dark"] { /* 深色模式变量（您可自行补充） */ }
body {
    font-family: -apple-system, 'Segoe UI', Roboto, sans-serif;
    background: var(--gradient-bg);
    color: var(--text-primary);
    padding: 0;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: background 0.5s;
    overscroll-behavior: none;
    overflow: hidden;
}
.app-container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    background: transparent;
    min-height: 100dvh;
    position: relative;
    z-index: 1;
    overscroll-behavior: contain;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

/* ===== 顶部导航 ===== */
.header { 
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    z-index: 1000;
    max-width: 100%;
    box-shadow: var(--glass-shadow);
    flex-shrink: 0;
    width: 100%;
}
@media (min-width:600px){ 
    .header { 
        max-width: calc(var(--max-width) + 32px); 
        margin: 0 auto; 
        border-radius: 0 0 var(--radius) var(--radius); 
        left: auto; 
        transform: none; 
    } 
}
.header .logo { font-size:clamp(16px,2.5vw,20px); font-weight:800; background:var(--gradient-main); -webkit-background-clip:text; -webkit-text-fill-color:transparent; display:flex; align-items:center; gap:8px; }
.header .logo i { font-size:clamp(18px,2.8vw,22px); -webkit-text-fill-color:var(--primary); background:none; }
.header .user-actions { display:flex; align-items:center; gap:8px; }
.header .theme-toggle { width:34px; height:34px; border-radius:50%; border:none; background:rgba(108,99,255,0.08); color:var(--text-secondary); font-size:16px; cursor:pointer; transition:var(--transition); display:flex; align-items:center; justify-content:center; }
.header .theme-toggle:hover { background:rgba(108,99,255,0.16); transform:rotate(30deg); }
.header .auth-btn { font-size:clamp(11px,1.4vw,13px); padding:4px 14px; border-radius:20px; border:1px solid var(--border-color); background:var(--glass-bg); backdrop-filter:blur(8px); color:var(--text-secondary); cursor:pointer; transition:var(--transition); font-weight:600; }
.header .auth-btn:hover { background:var(--primary); color:#fff; border-color:var(--primary); transform:translateY(-1px); box-shadow:0 4px 16px rgba(108,99,255,0.25); }
.header .user-info { display:flex; align-items:center; gap:8px; cursor:pointer; padding:4px 12px 4px 4px; border-radius:30px; background:rgba(108,99,255,0.06); transition:var(--transition); }
.header .user-info:hover { background:rgba(108,99,255,0.12); }
.header .user-info .avatar { width:32px; height:32px; border-radius:50%; background:var(--gradient-main); color:#fff; display:flex; align-items:center; justify-content:center; font-weight:700; font-size:14px; box-shadow:0 2px 12px rgba(108,99,255,0.25); }
.header .user-info .name { font-size:13px; font-weight:600; color:var(--text-primary); }
.header .user-info .logout-btn { font-size:12px; color:var(--text-light); background:none; border:none; cursor:pointer; padding:0 4px; transition:var(--transition); }
.header .user-info .logout-btn:hover { color:var(--secondary); }

/* ===== 搜索栏（固定） ===== */
#searchBar {
    flex-shrink: 0;
    padding: 10px 16px 6px;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    width: 100%;
    position: sticky;
    top: var(--header-height);
    z-index: 99;
}
#searchBar .search-box { display:flex; align-items:center; background:rgba(108,99,255,0.06); border-radius:28px; padding:0 16px; height:clamp(38px,5vw,44px); border:1px solid transparent; transition:var(--transition); backdrop-filter:blur(4px); }
#searchBar .search-box:focus-within { border-color:var(--primary-light); background:rgba(255,255,255,0.7); box-shadow:0 0 0 4px rgba(108,99,255,0.08); }
#searchBar .search-box i { color:var(--text-light); font-size:clamp(14px,1.8vw,16px); margin-right:10px; }
#searchBar .search-box input { border:none; background:transparent; outline:none; font-size:clamp(13px,1.6vw,15px); color:var(--text-primary); width:100%; font-weight:400; }
#searchBar .search-box input::placeholder { color:var(--text-light); }

/* ===== 轮播广告（固定） ===== */
#carouselSection {
    flex-shrink: 0;
    padding: 12px 16px 8px;
    background: transparent;
    width: 100%;
    transition: height 0.3s ease, opacity 0.3s ease;
    overflow: hidden;
}
#carouselSection .carousel-wrapper { position:relative; border-radius:var(--radius); overflow:hidden; box-shadow:var(--card-shadow); aspect-ratio:16/5.5; background:var(--gradient-main); }
@media (min-width:600px){ #carouselSection .carousel-wrapper { aspect-ratio:16/4.2; } }
#carouselSection .slides { display:flex; width:100%; height:100%; transition:transform 0.7s cubic-bezier(0.4,0,0.2,1); }
#carouselSection .slide { flex:0 0 100%; height:100%; display:flex; align-items:center; justify-content:center; color:#fff; font-size:clamp(16px,2.8vw,22px); font-weight:700; padding:20px; text-align:center; flex-direction:column; position:relative; }
#carouselSection .slide:nth-child(1) { background:linear-gradient(135deg,#6C63FF,#8B83FF); }
#carouselSection .slide:nth-child(2) { background:linear-gradient(135deg,#FF6584,#FF85A0); }
#carouselSection .slide:nth-child(3) { background:linear-gradient(135deg,#4FACFE,#00F2FE); }
#carouselSection .slide .sub { font-size:clamp(12px,1.6vw,15px); font-weight:400; opacity:0.85; margin-top:4px; }
#carouselSection .slide .badge-tag { position:absolute; top:12px; left:16px; font-size:clamp(9px,1.2vw,12px); background:rgba(255,255,255,0.2); backdrop-filter:blur(8px); padding:2px 14px; border-radius:20px; font-weight:500; letter-spacing:0.5px; }
#carouselSection .dots { position:absolute; bottom:14px; left:50%; transform:translateX(-50%); display:flex; gap:8px; }
#carouselSection .dots span { width:clamp(7px,1vw,9px); height:clamp(7px,1vw,9px); border-radius:50%; background:rgba(255,255,255,0.35); cursor:pointer; transition:var(--transition); border:1px solid rgba(255,255,255,0.1); }
#carouselSection .dots span.active { background:#fff; width:clamp(20px,2.8vw,28px); border-radius:6px; border-color:#fff; }

/* ===== 分类标签（固定） ===== */
#categoryTabs {
    flex-shrink: 0;
    display: flex;
    gap: 6px;
    padding: 10px 16px 8px;
    background: transparent;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    width: 100%;
}
#categoryTabs::-webkit-scrollbar { display:none; }
#categoryTabs .cat-btn { flex-shrink:0; padding:6px clamp(16px,3vw,26px); border-radius:30px; border:1px solid var(--border-color); background:var(--glass-bg); backdrop-filter:blur(8px); font-size:clamp(12px,1.6vw,14px); font-weight:600; color:var(--text-secondary); cursor:pointer; transition:var(--transition); white-space:nowrap; box-shadow:0 2px 8px rgba(108,99,255,0.04); }
#categoryTabs .cat-btn.active { background:var(--gradient-main); color:#fff; border-color:transparent; box-shadow:0 4px 16px rgba(108,99,255,0.30); transform:translateY(-1px); }
#categoryTabs .cat-btn:hover:not(.active) { background:rgba(108,99,255,0.06); transform:translateY(-1px); }

/* ===== 页面容器（滚动） ===== */
.page-container {
    flex: 1;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    display: none !important;
    width: 100%;
}
.page-container.active {
    display: block !important;
}

/* ===== 帖子列表 ===== */
.post-list { padding:12px 16px; width:100%; }
.post-card { background:var(--card-bg); backdrop-filter:blur(16px); border-radius:var(--radius); padding:clamp(14px,2vw,20px) clamp(16px,2.2vw,24px); margin-bottom:16px; box-shadow:var(--card-shadow); transition:var(--transition); border:1px solid var(--card-border); position:relative; overflow:hidden; }
.post-card::before { content:''; position:absolute; top:0; left:0; right:0; height:3px; background:var(--gradient-main); opacity:0.6; }
.post-card:hover { box-shadow:var(--card-shadow-hover); transform:translateY(-3px); }
.post-card .post-header { display:flex; align-items:center; gap:clamp(10px,1.6vw,16px); margin-bottom:6px; cursor:pointer; }
.post-card .post-header:hover .post-user .name { color:var(--primary); }
.post-card .post-avatar { width:clamp(38px,5vw,48px); height:clamp(38px,5vw,48px); border-radius:50%; background:var(--gradient-main); display:flex; align-items:center; justify-content:center; color:#fff; font-weight:700; font-size:clamp(15px,2vw,19px); flex-shrink:0; box-shadow:0 2px 12px rgba(108,99,255,0.20); transition:var(--transition); }
.post-card .post-header:hover .post-avatar { transform:scale(1.05); }
.post-card .post-user { flex:1; min-width:0; }
.post-card .post-user .name { font-weight:700; font-size:clamp(14px,1.6vw,16px); display:flex; align-items:center; gap:6px; flex-wrap:wrap; transition:var(--transition); }
.post-card .post-user .name .tag { font-size:clamp(9px,1vw,11px); background:linear-gradient(135deg,#FF6584,#FF85A0); color:#fff; padding:0 10px; border-radius:12px; font-weight:600; line-height:18px; }
.post-card .post-user .name .tag.blue { background:linear-gradient(135deg,#4FACFE,#6C63FF); }
.post-card .post-user .name .tag.green { background:linear-gradient(135deg,#2D9B4E,#56C479); }
.post-card .post-user .time { font-size:clamp(10px,1.2vw,12px); color:var(--text-light); margin-top:1px; }
.post-card .post-category-label { font-size:clamp(10px,1.2vw,12px); color:var(--primary); background:rgba(108,99,255,0.08); padding:1px 12px; border-radius:12px; font-weight:600; margin-left:auto; flex-shrink:0; }
.post-card .post-content { font-size:clamp(14px,1.8vw,17px); line-height:1.8; color:var(--text-primary); margin:8px 0 10px; word-break:break-word; white-space:pre-wrap; }
.post-card .post-contact { font-size:clamp(12px,1.4vw,14px); color:var(--text-secondary); background:rgba(108,99,255,0.04); padding:4px 14px; border-radius:var(--radius-xs); margin:6px 0 10px; display:inline-block; backdrop-filter:blur(4px); border:1px solid var(--border-color); }
.post-card .post-contact i { margin-right:6px; color:var(--primary); }
.post-card .post-actions { display:flex; align-items:center; gap:clamp(10px,2vw,20px); padding-top:12px; border-top:1px solid var(--border-color); flex-wrap:wrap; }
.post-card .post-actions .action-btn { display:flex; align-items:center; gap:5px; border:none; background:transparent; color:var(--text-light); font-size:clamp(12px,1.4vw,14px); cursor:pointer; transition:var(--transition); padding:4px 10px; border-radius:20px; font-weight:500; }
.post-card .post-actions .action-btn i { font-size:clamp(15px,1.8vw,18px); transition:var(--transition); }
.post-card .post-actions .action-btn:hover { color:var(--primary); background:rgba(108,99,255,0.06); transform:translateY(-1px); }
.post-card .post-actions .action-btn.liked { color:var(--secondary); }
@keyframes likePop { 0%{transform:scale(1);} 40%{transform:scale(1.5);color:#FF6584;} 100%{transform:scale(1);} }
.post-card .post-actions .action-btn.liked i { animation:likePop 0.4s ease; }
.post-card .post-actions .delete-btn { color:#e74c3c; margin-left:auto; }
.post-card .post-actions .delete-btn:hover { background:rgba(231,76,60,0.1); color:#c0392b; }

/* ===== 评论区域 ===== */
.comment-section { margin-top:12px; border-top:1px solid var(--border-color); padding-top:12px; }
.comment-section .comment-input-group { display:flex; gap:8px; margin-bottom:10px; }
.comment-section .comment-input-group input { flex:1; padding:8px 16px; border:1px solid var(--border-color); border-radius:24px; font-size:13px; outline:none; background:rgba(108,99,255,0.04); transition:var(--transition); color:var(--text-primary); }
.comment-section .comment-input-group input:focus { border-color:var(--primary-light); background:rgba(255,255,255,0.6); box-shadow:0 0 0 4px rgba(108,99,255,0.06); }
.comment-section .comment-input-group button { padding:6px 18px; border:none; background:var(--gradient-main); color:#fff; border-radius:24px; font-size:13px; font-weight:600; cursor:pointer; transition:var(--transition); box-shadow:0 2px 12px rgba(108,99,255,0.20); }
.comment-section .comment-input-group button:hover { transform:translateY(-2px); box-shadow:0 4px 20px rgba(108,99,255,0.30); }
.comment-list .comment-item { display:flex; gap:10px; padding:8px 0; border-bottom:1px solid var(--border-color); }
.comment-list .comment-item:last-child { border-bottom:none; }
.comment-list .comment-item .c-avatar { width:28px; height:28px; border-radius:50%; background:var(--gradient-main); color:#fff; display:flex; align-items:center; justify-content:center; font-size:12px; font-weight:600; flex-shrink:0; }
.comment-list .comment-item .c-body { flex:1; }
.comment-list .comment-item .c-body .c-name { font-size:12px; font-weight:600; color:var(--text-primary); }
.comment-list .comment-item .c-body .c-text { font-size:13px; color:var(--text-secondary); }
.comment-list .comment-item .c-body .c-time { font-size:10px; color:var(--text-light); }

/* ===== 消息页面 ===== */
.message-tabs { display:flex; background:var(--glass-bg); backdrop-filter:blur(12px); border-bottom:1px solid var(--glass-border); padding:0 16px; border-radius:var(--radius) var(--radius) 0 0; }
.message-tabs .msg-tab { 
    flex:1; 
    padding:14px 0 12px; 
    border:none; 
    background:transparent; 
    font-size:14px; 
    font-weight:600; 
    color:var(--text-secondary); 
    cursor:pointer; 
    border-bottom:3px solid transparent; 
    transition:var(--transition);
    position:relative; /* 为红标定位 */
}
.message-tabs .msg-tab.active { color:var(--primary); border-bottom-color:var(--primary); }
.message-tabs .msg-tab:hover { color:var(--primary); }

/* ===== 消息标签红标 ===== */
.msg-tab-badge {
    position: absolute;
    top: 4px;
    right: 4px;
    background: #FF6584;
    color: #fff;
    font-size: 10px;
    font-weight: 700;
    min-width: 18px;
    height: 18px;
    border-radius: 50%;
    padding: 0 6px;
    text-align: center;
    line-height: 18px;
    box-shadow: 0 2px 8px rgba(255,101,132,0.3);
    display: none;
}

.message-list { padding:12px 16px; }

/* ===== 通知列表项间距（优化） ===== */
.msg-item { 
    display:flex; 
    align-items:center; 
    gap:12px; 
    padding:14px 16px; 
    border-radius:var(--radius-sm); 
    cursor:pointer; 
    transition:var(--transition); 
    background:var(--glass-bg); 
    backdrop-filter:blur(8px); 
    margin-bottom:12px; 
    border:1px solid var(--glass-border); 
}
.msg-item:hover { background:rgba(108,99,255,0.06); transform:translateX(4px); }
.msg-item .msg-avatar { width:44px; height:44px; border-radius:50%; display:flex; align-items:center; justify-content:center; color:#fff; font-weight:700; font-size:16px; flex-shrink:0; box-shadow:0 2px 12px rgba(108,99,255,0.15); }
.msg-item .msg-info { flex:1; min-width:0; }
.msg-item .msg-info .msg-name { font-weight:600; font-size:15px; }
.msg-item .msg-info .msg-preview { font-size:13px; color:var(--text-secondary); white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.msg-item .msg-time { font-size:11px; color:var(--text-light); flex-shrink:0; }
.msg-item .msg-badge { background:var(--secondary); color:#fff; border-radius:50%; min-width:20px; height:20px; display:flex; align-items:center; justify-content:center; font-size:11px; font-weight:700; padding:0 6px; box-shadow:0 2px 8px rgba(255,101,132,0.30); }

/* ===== 通知分类标签 + 红标数字 ===== */
.notif-tabs {
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border-color);
    padding: 8px 16px;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
.notif-tabs .notif-tab {
    padding: 6px 18px;
    border: none;
    border-radius: 20px;
    background: rgba(108,99,255,0.06);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.notif-tabs .notif-tab.active {
    background: var(--gradient-main);
    color: #fff;
    box-shadow: 0 2px 12px rgba(108,99,255,0.2);
}
.notif-tabs .notif-tab:hover:not(.active) {
    background: rgba(108,99,255,0.12);
}

/* 红标数字 */
.notif-tabs .notif-badge {
    display: none;
    background: #FF6584;
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    min-width: 18px;
    height: 18px;
    border-radius: 50%;
    padding: 0 6px;
    text-align: center;
    line-height: 18px;
    box-shadow: 0 2px 8px rgba(255,101,132,0.3);
}

.notif-item {
    cursor: pointer;
}
.notif-item:hover {
    background: rgba(108,99,255,0.04);
}
.msg-avatar i {
    font-size: 18px;
}

/* ===== 通知未读红点（增强） ===== */
.msg-item .unread-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #FF6584;
    flex-shrink: 0;
    box-shadow: 0 0 12px rgba(255,101,132,0.6);
    margin-left: 8px;
    border: 2px solid #fff;
    animation: pulse-dot 1.5s ease-in-out infinite;
}

@keyframes pulse-dot {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.2); opacity: 0.7; }
    100% { transform: scale(1); opacity: 1; }
}

/* ===== 聊天详情 ===== */
.chat-detail {
    display: none !important;
    flex-direction: column;
    height: 100%;
    background: var(--card-bg, rgba(255,255,255,0.75));
    backdrop-filter: blur(16px);
    overflow: hidden;
    margin: 0;
    border-radius: 0;
    box-shadow: none;
    border: none;
    overscroll-behavior: contain;
}
.chat-detail.active {
    display: flex !important;
}
.chat-detail .chat-header { padding:12px 16px; border-bottom:1px solid var(--border-color); display:flex; align-items:center; gap:12px; background:var(--glass-bg); backdrop-filter:blur(8px); }
.chat-detail .chat-header .back-btn { border:none; background:none; font-size:20px; cursor:pointer; color:var(--text-secondary); transition:var(--transition); padding:4px; border-radius:50%; }
.chat-detail .chat-header .back-btn:hover { background:rgba(108,99,255,0.06); color:var(--primary); }
.chat-detail .chat-header .chat-name { font-weight:700; font-size:16px; }
.chat-detail .chat-messages { flex:1; padding:16px; overflow-y:auto; display:flex; flex-direction:column; gap:8px; background:rgba(108,99,255,0.02); }
.chat-detail .chat-messages .chat-msg { max-width:80%; padding:10px 16px; border-radius:18px; font-size:14px; line-height:1.6; word-break:break-word; animation:msgIn 0.3s ease; }
@keyframes msgIn { from{opacity:0;transform:translateY(10px) scale(0.95);} to{opacity:1;transform:translateY(0) scale(1);} }
.chat-detail .chat-messages .chat-msg.sent { align-self:flex-end; background:var(--gradient-main); color:#fff; border-bottom-right-radius:4px; box-shadow:0 2px 12px rgba(108,99,255,0.20); }
.chat-detail .chat-messages .chat-msg.received { align-self:flex-start; background:var(--glass-bg); backdrop-filter:blur(8px); border:1px solid var(--border-color); border-bottom-left-radius:4px; }
.chat-detail .chat-messages .chat-msg .msg-time { font-size:10px; opacity:0.6; margin-top:4px; display:block; }
.chat-detail .chat-input-area { display:flex; padding:10px 12px; border-top:1px solid var(--border-color); background:var(--glass-bg); backdrop-filter:blur(8px); gap:8px; flex-wrap:wrap; }
.chat-detail .chat-input-area input { flex:1; padding:8px 16px; border:1px solid var(--border-color); border-radius:24px; font-size:14px; outline:none; background:rgba(108,99,255,0.04); transition:var(--transition); color:var(--text-primary); min-width:120px; }
.chat-detail .chat-input-area input:focus { border-color:var(--primary-light); box-shadow:0 0 0 4px rgba(108,99,255,0.06); }
.chat-detail .chat-input-area button { padding:8px 20px; border:none; background:var(--gradient-main); color:#fff; border-radius:24px; font-weight:600; cursor:pointer; transition:var(--transition); box-shadow:0 2px 12px rgba(108,99,255,0.20); }
.chat-detail .chat-input-area button:hover { transform:translateY(-2px); box-shadow:0 4px 20px rgba(108,99,255,0.30); }
.chat-detail .chat-input-area button:disabled { opacity:0.4; cursor:not-allowed; transform:none; }
.chat-detail .chat-input-area .chat-simulate-btn { padding:8px 16px; border:1px solid var(--border-color); background:var(--glass-bg); backdrop-filter:blur(8px); border-radius:20px; font-size:12px; cursor:pointer; color:var(--text-secondary); transition:var(--transition); font-weight:500; }
.chat-detail .chat-input-area .chat-simulate-btn:hover { background:var(--primary); color:#fff; border-color:var(--primary); transform:scale(1.05); }
.chat-waiting-tip { padding:8px 16px; background:rgba(255,193,7,0.12); color:#856404; text-align:center; font-size:13px; border-top:1px solid var(--border-color); backdrop-filter:blur(4px); }

/* ===== 工具页面 ===== */
.tool-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:12px; padding:12px 16px; }
.tool-item { background:var(--card-bg); backdrop-filter:blur(16px); border-radius:var(--radius-sm); padding:20px 12px; text-align:center; border:1px solid var(--card-border); box-shadow:var(--card-shadow); transition:var(--transition); cursor:pointer; }
.tool-item:hover { transform:translateY(-4px); box-shadow:var(--card-shadow-hover); }
.tool-item .tool-icon { font-size:32px; margin-bottom:8px; display:block; }
.tool-item .tool-name { font-size:13px; font-weight:600; color:var(--text-primary); }
.tool-item .tool-desc { font-size:11px; color:var(--text-light); margin-top:2px; }

/* ===== 底部导航 ===== */
.bottom-nav { 
    position: sticky;
    bottom: 0;
    height: calc(var(--nav-height) + var(--safe-bottom));
    padding-bottom: var(--safe-bottom);
    background: var(--glass-bg);
    backdrop-filter: blur(24px);
    border-top: 1px solid var(--glass-border);
    display: flex;
    align-items: stretch;
    justify-content: space-around;
    z-index: 999;
    box-shadow: 0 -4px 30px rgba(108,99,255,0.06);
    max-width: 100%;
    flex-shrink: 0;
    width: 100%;
}
@media (min-width:600px){ 
    .bottom-nav { 
        max-width: calc(var(--max-width) + 32px); 
        margin: 0 auto; 
        border-radius: var(--radius) var(--radius) 0 0; 
        left: auto; 
        transform: none; 
    } 
}
.nav-item { flex:1; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:1px; border:none; background:transparent; color:var(--text-light); font-size:clamp(9px,1.2vw,11px); cursor:pointer; transition:var(--transition); position:relative; padding:4px 0; font-weight:500; border-radius:12px; }
.nav-item i { font-size:clamp(22px,3vw,28px); transition:var(--transition); }
.nav-item span { font-size:clamp(9px,1.2vw,11px); margin-top:0px; }
.nav-item.active { color:var(--primary); }
.nav-item.active i { transform:translateY(-3px) scale(1.08); }
.nav-item:hover:not(.publish-btn) { color:var(--primary); background:rgba(108,99,255,0.04); }
.nav-item .nav-badge { position:absolute; top:2px; right:50%; transform:translateX(calc(50% + 14px)); background:var(--secondary); color:#fff; font-size:10px; font-weight:700; min-width:18px; height:18px; border-radius:50%; display:flex; align-items:center; justify-content:center; border:2px solid var(--card-bg); box-shadow:0 2px 8px rgba(255,101,132,0.30); }
.nav-item.publish-btn { background:var(--gradient-main); color:#fff; border-radius:50%; width:clamp(52px,7.5vw,64px); height:clamp(52px,7.5vw,64px); margin-top:calc(-1 * clamp(14px,2.2vw,20px)); box-shadow:0 6px 24px rgba(108,99,255,0.35); transition:var(--transition); flex:0 0 auto; }
.nav-item.publish-btn i { font-size:clamp(26px,3.8vw,32px); color:#fff; }
.nav-item.publish-btn:hover { transform:scale(1.08) rotate(90deg); box-shadow:0 8px 32px rgba(108,99,255,0.45); }
.nav-item.publish-btn:active { transform:scale(0.92); }

/* ===== 模态框 ===== */
.modal-overlay { display:none; position:fixed; top:0; left:0; right:0; bottom:0; background:rgba(0,0,0,0.35); backdrop-filter:blur(12px); z-index:9998; align-items:center; justify-content:center; padding:20px; animation:fadeUp 0.35s ease; }
.modal-overlay.show { display:flex; }
@keyframes fadeUp { from{opacity:0;transform:scale(0.92) translateY(20px);} to{opacity:1;transform:scale(1) translateY(0);} }
.modal-content { background:var(--card-bg); backdrop-filter:blur(20px); border-radius:var(--radius); padding:clamp(20px,3vw,32px) clamp(16px,2.5vw,28px); max-width:520px; width:100%; max-height:85vh; overflow-y:auto; box-shadow:0 24px 64px rgba(0,0,0,0.15); border:1px solid var(--card-border); }
.modal-content .modal-header { display:flex; justify-content:space-between; align-items:center; margin-bottom:16px; }
.modal-content .modal-header h3 { font-size:clamp(18px,2.4vw,22px); font-weight:700; background:var(--gradient-main); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.modal-content .modal-header .close-btn { border:none; background:rgba(108,99,255,0.06); border-radius:50%; width:36px; height:36px; font-size:20px; color:var(--text-light); cursor:pointer; transition:var(--transition); display:flex; align-items:center; justify-content:center; }
.modal-content .modal-header .close-btn:hover { background:rgba(108,99,255,0.12); transform:rotate(90deg); }
.modal-content .form-group { margin-bottom:14px; }
.modal-content .form-group label { display:block; font-size:13px; font-weight:600; margin-bottom:4px; color:var(--text-secondary); }
.modal-content .form-group input, .modal-content .form-group textarea { width:100%; padding:10px 14px; border:1px solid var(--border-color); border-radius:var(--radius-sm); font-size:14px; outline:none; transition:var(--transition); background:rgba(108,99,255,0.04); color:var(--text-primary); font-family:inherit; }
.modal-content .form-group textarea { resize:vertical; min-height:80px; }
.modal-content .form-group input:focus, .modal-content .form-group textarea:focus { border-color:var(--primary-light); background:rgba(255,255,255,0.6); box-shadow:0 0 0 4px rgba(108,99,255,0.06); }
.modal-content .submit-btn { width:100%; padding:12px; border:none; background:var(--gradient-main); color:#fff; font-size:16px; font-weight:700; border-radius:var(--radius-sm); cursor:pointer; transition:var(--transition); box-shadow:0 2px 16px rgba(108,99,255,0.25); }
.modal-content .submit-btn:hover { transform:translateY(-2px); box-shadow:0 4px 24px rgba(108,99,255,0.35); }
.modal-content .switch-auth { text-align:center; margin-top:12px; font-size:13px; color:var(--text-secondary); }
.modal-content .switch-auth span { color:var(--primary); font-weight:600; cursor:pointer; transition:var(--transition); }
.modal-content .switch-auth span:hover { text-decoration:underline; }

/* ===== 发布弹窗 ===== */
.publish-tip { background:rgba(255,101,132,0.10); border-left:4px solid var(--secondary); padding:8px 14px; border-radius:var(--radius-xs); margin-bottom:12px; font-size:13px; color:var(--text-secondary); display:flex; align-items:center; gap:8px; }
.publish-tip i { color:var(--secondary); font-size:16px; }
.publish-tip strong { color:var(--secondary); }
.modal-content .publish-category-select { display:flex; gap:8px; margin-bottom:12px; flex-wrap:wrap; }
.modal-content .publish-category-select button { padding:4px clamp(12px,2vw,18px); border-radius:20px; border:1px solid var(--border-color); background:transparent; font-size:clamp(12px,1.4vw,14px); font-weight:500; color:var(--text-secondary); cursor:pointer; transition:var(--transition); }
.modal-content .publish-category-select button.active { background:var(--gradient-main); color:#fff; border-color:transparent; box-shadow:0 2px 12px rgba(108,99,255,0.20); }
.modal-content .publish-tools { display:flex; align-items:center; gap:12px; margin:12px 0 16px; flex-wrap:wrap; }
.modal-content .publish-tools .tool-btn { width:clamp(38px,5vw,44px); height:clamp(38px,5vw,44px); border-radius:50%; border:1px solid var(--border-color); background:transparent; font-size:clamp(16px,2vw,20px); color:var(--text-secondary); cursor:pointer; transition:var(--transition); display:flex; align-items:center; justify-content:center; }
.modal-content .publish-tools .tool-btn:hover { background:rgba(108,99,255,0.06); border-color:var(--primary-light); color:var(--primary); transform:scale(1.05); }
.modal-content .publish-btn { width:100%; padding:clamp(12px,1.8vw,16px); border:none; background:var(--gradient-main); color:#fff; font-size:clamp(16px,2vw,19px); font-weight:700; border-radius:var(--radius-sm); cursor:pointer; transition:var(--transition); box-shadow:0 2px 16px rgba(108,99,255,0.25); }
.modal-content .publish-btn:hover { transform:translateY(-2px); box-shadow:0 4px 24px rgba(108,99,255,0.35); }

/* ===== 资料卡 ===== */
.profile-card .pc-avatar { width:72px; height:72px; border-radius:50%; margin:0 auto 12px; display:flex; align-items:center; justify-content:center; color:#fff; font-size:28px; font-weight:700; box-shadow:0 4px 20px rgba(108,99,255,0.25); }
.profile-card .pc-name { text-align:center; font-size:18px; font-weight:700; }
.profile-card .pc-bio { text-align:center; font-size:13px; color:var(--text-secondary); margin-bottom:8px; }
.profile-card .pc-follow-stats { display:flex; justify-content:center; gap:24px; margin:12px 0; }
.profile-card .pc-follow-stats .stat { text-align:center; }
.profile-card .pc-follow-stats .stat .num { font-weight:700; font-size:18px; color:var(--text-primary); }
.profile-card .pc-follow-stats .stat .label { font-size:12px; color:var(--text-light); }
.profile-card .pc-posts-title { font-weight:600; margin:16px 0 8px; font-size:14px; color:var(--text-secondary); }
.profile-card .pc-post-item { padding:8px 0; border-bottom:1px solid var(--border-color); font-size:13px; color:var(--text-primary); cursor:pointer; transition:var(--transition); }
.profile-card .pc-post-item:hover { color:var(--primary); }
.profile-card .pc-post-item .pc-post-time { font-size:11px; color:var(--text-light); margin-left:8px; }
.pc-btn-follow { display:block; width:100%; padding:10px; border:none; border-radius:var(--radius-sm); font-size:16px; font-weight:600; cursor:pointer; transition:var(--transition); margin-top:8px; }
.pc-btn-follow.following { background:rgba(108,99,255,0.06); color:var(--text-secondary); border:1px solid var(--border-color); }
.pc-btn-follow.following:hover { background:rgba(231,76,60,0.08); color:#e74c3c; border-color:#e74c3c; }
.pc-btn-follow.not-following { background:var(--gradient-main); color:#fff; box-shadow:0 2px 16px rgba(108,99,255,0.25); }
.pc-btn-follow.not-following:hover { transform:translateY(-2px); box-shadow:0 4px 24px rgba(108,99,255,0.35); }
.pc-btn-chat { display:block; width:100%; padding:10px; border:none; border-radius:var(--radius-sm); font-size:16px; font-weight:600; cursor:pointer; transition:var(--transition); margin-top:8px; background:var(--glass-bg); backdrop-filter:blur(8px); border:1px solid var(--border-color); color:var(--text-primary); }
.pc-btn-chat:hover { background:var(--primary); color:#fff; border-color:var(--primary); transform:translateY(-2px); box-shadow:0 4px 16px rgba(108,99,255,0.25); }

/* ===== Toast ===== */
.toast { position:fixed; top:calc(var(--header-height) + 20px); left:50%; transform:translateX(-50%) translateY(-24px) scale(0.9); background:var(--card-bg); backdrop-filter:blur(20px); color:var(--text-primary); padding:clamp(10px,1.4vw,14px) clamp(20px,3vw,32px); border-radius:var(--radius-sm); font-size:clamp(13px,1.6vw,16px); font-weight:500; z-index:9999; opacity:0; pointer-events:none; box-shadow:0 8px 40px rgba(0,0,0,0.12); border:1px solid var(--card-border); display:flex; align-items:center; gap:10px; white-space:nowrap; max-width:90vw; transition:all 0.4s cubic-bezier(0.34,1.56,0.64,1); }
.toast.show { opacity:1; transform:translateX(-50%) translateY(0) scale(1); }
.toast i { font-size:clamp(16px,2vw,20px); }

/* ===== 空状态 ===== */
.empty-state { text-align:center; padding:40px 20px; color:var(--text-light); }
.empty-state i { font-size:48px; margin-bottom:12px; opacity:0.3; }

/* ===== 个人中心 ===== */
.profile-header { background:var(--card-bg); backdrop-filter:blur(16px); border-radius:var(--radius); padding:24px; margin-bottom:16px; box-shadow:var(--card-shadow); border:1px solid var(--card-border); text-align:center; }
.profile-header .big-avatar { width:72px; height:72px; border-radius:50%; background:var(--gradient-main); color:#fff; display:flex; align-items:center; justify-content:center; font-size:28px; font-weight:700; margin:0 auto 12px; box-shadow:0 4px 20px rgba(108,99,255,0.25); }
.profile-header .p-name { font-size:18px; font-weight:700; }
.profile-header .p-bio { font-size:13px; color:var(--text-secondary); }
.profile-stats { display:flex; justify-content:center; gap:24px; margin-top:12px; }
.profile-stats .stat { text-align:center; }
.profile-stats .stat .num { font-size:18px; font-weight:700; color:var(--text-primary); }
.profile-stats .stat .label { font-size:12px; color:var(--text-light); }
.profile-tabs { display:flex; gap:4px; background:var(--glass-bg); backdrop-filter:blur(8px); border-radius:var(--radius-sm); padding:4px; margin-bottom:16px; border:1px solid var(--border-color); }
.profile-tabs button { flex:1; padding:8px 0; border:none; background:transparent; border-radius:var(--radius-xs); font-weight:600; font-size:14px; color:var(--text-secondary); cursor:pointer; transition:var(--transition); }
.profile-tabs button.active { background:var(--gradient-main); color:#fff; box-shadow:0 2px 12px rgba(108,99,255,0.20); }

/* ===== 滚动条 ===== */
::-webkit-scrollbar { width:4px; height:4px; }
::-webkit-scrollbar-track { background:transparent; }
::-webkit-scrollbar-thumb { background:var(--primary-light); border-radius:10px; }
::-webkit-scrollbar-thumb:hover { background:var(--primary); }

/* ===== 响应式 ===== */
@media (min-width:600px){ 
    :root{--max-width:600px;} 
    .post-list{padding:16px 20px;} 
    #searchBar{padding:12px 20px 8px;} 
    #categoryTabs{padding:12px 20px 10px; gap:6px;} 
    #carouselSection{padding:16px 20px 12px;} 
    .post-card{padding:18px 22px; margin-bottom:18px;} 
    .post-card .post-actions{gap:24px;} 
    .modal-content{padding:28px 24px;} 
    .tool-grid{grid-template-columns:repeat(3,1fr); gap:16px; padding:16px 20px;} 
}

@media (min-width:900px){ 
    :root{--max-width:820px;} 
    body{padding:0; background:#eef1f8;} 
    .app-container{background:transparent; border-radius:var(--radius); padding:0; margin-top:4px; margin-bottom:20px; } 
    .header{border-radius:var(--radius) var(--radius) 0 0 !important; } 
    .bottom-nav{border-radius:0 0 var(--radius) var(--radius) !important; } 
    .post-list{padding:16px 0;} 
    .post-card{padding:20px 26px; margin-bottom:20px;} 
    .post-card:hover{transform:translateY(-3px);} 
    #categoryTabs{padding:12px 0 10px; gap:8px; justify-content:flex-start;} 
    #categoryTabs .cat-btn{padding:6px 26px;} 
    .tool-grid{grid-template-columns:repeat(4,1fr); gap:16px; padding:16px 0;} 
}

@media (min-width:1200px){ 
    :root{--max-width:960px;} 
    .post-list{display:grid; grid-template-columns:1fr 1fr; gap:16px; padding:16px 0;} 
    .post-card{margin-bottom:0;} 
}

/* ===== 三点菜单样式 ===== */
.chat-header .menu-btn {
    background: none;
    border: none;
    font-size: 20px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 50%;
    transition: background 0.2s;
}
.chat-header .menu-btn:hover {
    background: var(--hover-bg, rgba(0,0,0,0.05));
}
.chat-menu-panel {
    position: absolute;
    right: 12px;
    top: calc(100% + 8px);
    background: var(--card-bg, #ffffff);
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
    min-width: 190px;
    padding: 6px 0;
    z-index: 9999;
    border: 1px solid var(--border-color, #e8ecf1);
    animation: menuFadeIn 0.15s ease;
}
.chat-menu-panel ul {
    list-style: none;
    margin: 0;
    padding: 0;
}
.chat-menu-panel ul li {
    padding: 11px 20px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 12px;
    transition: background 0.15s;
}
.chat-menu-panel ul li:hover {
    background: var(--hover-bg, rgba(0,0,0,0.05));
}
[data-theme="dark"] .chat-menu-panel {
    background: #2d2d2d;
    border-color: #404040;
}
[data-theme="dark"] .chat-menu-panel ul li:hover {
    background: #3d3d3d;
}
@keyframes menuFadeIn {
    from { opacity: 0; transform: translateY(-8px) scale(0.96); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ===== 页面容器强制互斥 ===== */
.page-container {
    display: none !important;
}
.page-container.active {
    display: block !important;
}

/* 聊天详情独立控制 */
.chat-detail {
    display: none !important;
}
.chat-detail.active {
    display: flex !important;
}

/* 消息页面和聊天详情互斥 */
#page-message.active {
    display: block !important;
}
#chatDetail.active {
    display: flex !important;
}

/* 确保首页正常 */
#page-home.active {
    display: block !important;
}

/* 工具和我的页面 */
#page-tools.active {
    display: block !important;
}
#page-profile.active {
    display: block !important;
}

.ad-image {
    max-width: 100%;
    max-height: 300px;
    width: auto;
    height: auto;
    object-fit: contain;
}

/* ===== 强制修复首页滚动 ===== */
html, body {
    height: 100%;
    overflow: hidden !important;
}

.app-container {
    height: 100vh !important;
    max-height: 100vh !important;
    overflow: hidden !important;
}

#page-home {
    flex: 1 !important;
    height: 100% !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch;
}

#carouselSection {
    transition: height 0.3s ease, opacity 0.3s ease;
    overflow: hidden;
}

/* ===== 发布弹窗优化 ===== */
#publishModal .publish-category-select {
    margin-bottom: 4px;
}
#publishModal .publish-tip-sm {
    font-size: 12px;
    color: var(--text-light);
    margin-bottom: 12px;
    padding: 6px 12px;
    background: rgba(108,99,255,0.04);
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}
#publishModal .publish-tip-sm i {
    color: var(--primary);
}
#publishModal #publishText {
    min-height: 280px;
    font-size: 15px;
    line-height: 1.7;
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: rgba(108,99,255,0.02);
    transition: border-color 0.3s, box-shadow 0.3s;
    resize: vertical;
}
#publishModal #publishText:focus {
    border-color: var(--primary-light);
    box-shadow: 0 0 0 4px rgba(108,99,255,0.08);
    background: rgba(255,255,255,0.7);
}
#publishModal .publish-tools {
    margin-top: 8px;
}
#publishModal .publish-btn {
    margin-top: 12px;
}

/* ===== 分类选择模态框 ===== */
#categorySelectModal .category-option:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(108,99,255,0.25);
}
#categorySelectModal .category-option:active {
    transform: scale(0.97);
}

/* ===== 分类选择模态框 ===== */
#categorySelectModal .category-option {
    padding: 14px 20px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--glass-bg);
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s;
    text-align: left;
    display: block;
    width: 100%;
}
#categorySelectModal .category-option:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(108,99,255,0.25);
}
#categorySelectModal .category-option:active {
    transform: scale(0.97);
}
#categorySelectModal .modal-content {
    max-width: 400px;
    padding: 24px 28px;
}

/* ===== 发布弹窗输入框优化 ===== */
#publishModal #publishText {
    width: 100%;
    box-sizing: border-box;
    display: block;
    min-height: 400px;
    font-size: 16px;
    line-height: 1.8;
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    border: 2px solid var(--primary-light);
    background: rgba(108,99,255,0.02);
    transition: border-color 0.3s, box-shadow 0.3s;
    resize: vertical;
}
#publishModal #publishText:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(108,99,255,0.1);
    background: rgba(255,255,255,0.8);
}
#publishModal .modal-content {
    max-width: 600px;
}

/* ===== 媒体查看器 & 帖子媒体网格 ===== */
.media-viewer-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.9);
    z-index: 99999;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}
.media-viewer-overlay .media-viewer-close {
    position: absolute;
    top: 20px;
    right: 30px;
    color: #fff;
    font-size: 40px;
    cursor: pointer;
    z-index: 10;
}
.media-viewer-container {
    position: relative;
    width: 90%;
    max-width: 900px;
    max-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
.media-viewer-content {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}
.media-viewer-content img,
.media-viewer-content video {
    max-width: 100%;
    max-height: 80vh;
    border-radius: 8px;
    object-fit: contain;
}
.media-viewer-nav {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    pointer-events: none;
    padding: 0 10px;
}
.media-viewer-nav .media-nav-btn {
    pointer-events: auto;
    background: rgba(255,255,255,0.2);
    border: none;
    border-radius: 50%;
    width: 48px;
    height: 48px;
    color: #fff;
    font-size: 24px;
    cursor: pointer;
    transition: 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}
.media-viewer-nav .media-nav-btn:hover {
    background: rgba(255,255,255,0.4);
}
.media-viewer-counter {
    color: #fff;
    font-size: 16px;
    margin-top: 12px;
    text-align: center;
}
.post-media-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 6px;
    margin: 8px 0;
}
.post-media-single {
    display: block;
    margin: 8px 0;
}
.post-media-grid .media-thumb,
.post-media-single .media-single {
    position: relative;
    aspect-ratio: 1 / 1;
    overflow: hidden;
    border-radius: 6px;
    background: #000;
    cursor: pointer;
}
.post-media-single .media-single {
    aspect-ratio: auto;
    max-height: 400px;
}
.media-play-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #fff;
    font-size: 40px;
    opacity: 0.8;
    pointer-events: none;
    text-shadow: 0 0 20px rgba(0,0,0,0.5);
}

/* ===== 媒体更多覆盖层 ===== */
.media-more-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.5);
    color: #fff;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    border-radius: 6px;
    z-index: 2;
    transition: background 0.2s;
}
.media-more-overlay:hover {
    background: rgba(0,0,0,0.7);
}