/* =============================================
   宾阳中学论坛 - 增强版样式
   Apple Design Language Inspired
   ============================================= */

/* ===== RESET & BASE ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{font-size:16px;scroll-behavior:smooth}
body{
  font-family:'SimSun','宋体','Songti SC','PingFang SC','Hiragino Sans GB','Microsoft YaHei',serif;
  background:#f5f5f7;color:#1d1d1f;
  line-height:1.6;min-height:100vh;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  transition:background .6s cubic-bezier(.4,0,.2,1);
  overflow-x:hidden;
}
a{text-decoration:none;color:inherit}
button{cursor:pointer;font-family:inherit;border:none;outline:none;background:none}
input,textarea,select{font-family:inherit;outline:none;border:none}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
::selection{background:rgba(0,113,227,.15);color:#1d1d1f}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar{width:6px;height:6px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:rgba(0,0,0,.15);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:rgba(0,0,0,.3)}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
@keyframes fadeInDown{from{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}
@keyframes slideInRight{from{opacity:0;transform:translateX(40px)}to{opacity:1;transform:translateX(0)}}
@keyframes slideInLeft{from{opacity:0;transform:translateX(-40px)}to{opacity:1;transform:translateX(0)}}
@keyframes scaleIn{from{opacity:0;transform:scale(.92)}to{opacity:1;transform:scale(1)}}
@keyframes pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.15)}}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes shimmer{0%{background-position:-200% 0}100%{background-position:200% 0}}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}
@keyframes glow{0%,100%{box-shadow:0 0 20px rgba(0,113,227,.15)}50%{box-shadow:0 0 30px rgba(0,113,227,.3)}}
@keyframes ripple{to{transform:scale(2.5);opacity:0}}
@keyframes slideUp{from{opacity:0;transform:translateY(100%)}to{opacity:1;transform:translateY(0)}}
@keyframes bounceIn{0%{opacity:0;transform:scale(.3)}50%{transform:scale(1.05)}70%{transform:scale(.95)}100%{opacity:1;transform:scale(1)}}
@keyframes heartBeat{0%{transform:scale(1)}14%{transform:scale(1.3)}28%{transform:scale(1)}42%{transform:scale(1.3)}70%{transform:scale(1)}}

.fade-in{animation:fadeIn .5s ease forwards}
.fade-in-up{animation:fadeInUp .6s ease forwards}

/* ===== NAVBAR ===== */
.navbar{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  height:52px;
  background:rgba(251,251,253,.72);
  backdrop-filter:saturate(180%) blur(20px);
  -webkit-backdrop-filter:saturate(180%) blur(20px);
  border-bottom:.5px solid rgba(0,0,0,.1);
  display:flex;align-items:center;
  padding:0 20px;
  transition:all .4s cubic-bezier(.4,0,.2,1);
}
.navbar.scrolled{
  background:rgba(251,251,253,.92);
  box-shadow:0 .5px 0 rgba(0,0,0,.08),0 4px 16px rgba(0,0,0,.04);
}
.navbar-logo{
  display:flex;align-items:center;gap:10px;cursor:pointer;
  transition:transform .3s ease;
}
.navbar-logo:hover{transform:scale(1.02)}
.navbar-logo:active{transform:scale(.98)}
.navbar-logo img{
  height:30px;width:30px;border-radius:7px;object-fit:cover;
  box-shadow:0 1px 4px rgba(0,0,0,.1);
}
.navbar-logo span{
  font-size:16px;font-weight:700;
  background:linear-gradient(135deg,#1d1d1f,#424245);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
  letter-spacing:.5px;
}
.navbar-links{display:flex;align-items:center;gap:2px;margin-left:28px}
.navbar-links a,.navbar-links button{
  padding:7px 16px;font-size:13px;color:#424245;
  border-radius:20px;transition:all .3s cubic-bezier(.4,0,.2,1);
  background:transparent;position:relative;font-weight:400;
  letter-spacing:.3px;
}
.navbar-links a:hover,.navbar-links button:hover{color:#1d1d1f;background:rgba(0,0,0,.06)}
.navbar-links a.active{color:#1d1d1f;font-weight:600;background:rgba(0,0,0,.06)}
.nav-search{position:relative;margin-left:auto}
.nav-search input{
  width:190px;height:32px;
  background:rgba(0,0,0,.06);
  border-radius:16px;
  padding:0 12px 0 34px;
  font-size:12px;color:#1d1d1f;
  transition:all .4s cubic-bezier(.4,0,.2,1);
  border:1.5px solid transparent;
}
.nav-search input:focus{
  width:280px;background:rgba(255,255,255,.95);
  border-color:rgba(0,113,227,.4);
  box-shadow:0 0 0 3px rgba(0,113,227,.1);
}
.nav-search input::placeholder{color:#86868b}
.nav-search::before{
  content:'🔍';position:absolute;left:10px;top:50%;transform:translateY(-50%);
  font-size:13px;pointer-events:none;
}
.nav-right{display:flex;align-items:center;gap:10px;margin-left:14px}
.nav-badge{
  position:relative;padding:6px;border-radius:50%;
  transition:all .25s ease;font-size:18px;
}
.nav-badge:hover{background:rgba(0,0,0,.06)}
.nav-badge .badge{
  position:absolute;top:0;right:-2px;
  min-width:16px;height:16px;
  background:linear-gradient(135deg,#ff3b30,#ff6259);
  color:#fff;
  font-size:10px;border-radius:8px;
  display:flex;align-items:center;justify-content:center;
  padding:0 4px;font-weight:600;
  box-shadow:0 2px 6px rgba(255,59,48,.4);
  animation:bounceIn .4s ease;
}
.nav-user-btn{
  display:flex;align-items:center;gap:6px;
  padding:4px 12px 4px 4px;
  border-radius:20px;
  transition:all .3s ease;
}
.nav-user-btn:hover{background:rgba(0,0,0,.06)}
.nav-user-avatar{
  width:28px;height:28px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:12px;color:#fff;overflow:hidden;
  font-weight:600;
  box-shadow:0 1px 3px rgba(0,0,0,.15);
}

/* ===== MAIN LAYOUT ===== */
.main-content{
  margin-top:52px;
  min-height:calc(100vh - 52px);
  padding:20px;
  max-width:1440px;
  margin-left:auto;margin-right:auto;
}

/* ===== AUTH PAGE ===== */
.auth-page{
  display:flex;align-items:center;justify-content:center;
  min-height:calc(100vh - 52px);
  padding:20px;
  background:linear-gradient(180deg,#f5f5f7 0%,#e8e8ed 100%);
}
.auth-card{
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(20px);
  border-radius:24px;
  padding:48px 40px;
  width:420px;max-width:100%;
  box-shadow:
    0 0 0 .5px rgba(0,0,0,.05),
    0 20px 60px rgba(0,0,0,.08),
    0 4px 16px rgba(0,0,0,.04);
  animation:scaleIn .6s cubic-bezier(.16,1,.3,1);
}
.auth-card .logo-section{text-align:center;margin-bottom:36px}
.auth-card .logo-section img{
  width:80px;height:80px;border-radius:20px;margin:0 auto 16px;
  object-fit:cover;
  box-shadow:0 4px 16px rgba(0,0,0,.1);
  transition:transform .4s ease;
}
.auth-card .logo-section img:hover{transform:scale(1.05) rotate(2deg)}
.auth-card .logo-section h1{
  font-size:24px;font-weight:800;color:#1d1d1f;
  letter-spacing:1px;
}
.auth-card .logo-section p{
  font-size:14px;color:#86868b;margin-top:6px;
  letter-spacing:2px;
  background:linear-gradient(90deg,#86868b,#aaa,#86868b);
  background-size:200% auto;
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  animation:shimmer 3s linear infinite;
}
.auth-tabs{
  display:flex;margin-bottom:28px;
  background:#f5f5f7;border-radius:12px;padding:3px;
}
.auth-tab{
  flex:1;padding:11px;text-align:center;font-size:14px;
  border-radius:10px;transition:all .35s cubic-bezier(.4,0,.2,1);
  color:#86868b;font-weight:500;cursor:pointer;
}
.auth-tab.active{
  background:#fff;color:#1d1d1f;
  box-shadow:0 1px 4px rgba(0,0,0,.06),0 0 0 .5px rgba(0,0,0,.04);
  font-weight:600;
}
.auth-form .form-group{margin-bottom:20px}
.auth-form label{
  display:block;font-size:12px;color:#86868b;
  margin-bottom:6px;font-weight:500;text-transform:uppercase;letter-spacing:.5px;
}
.auth-form input{
  width:100%;height:48px;
  background:#f5f5f7;border-radius:12px;
  padding:0 16px;font-size:15px;
  transition:all .35s cubic-bezier(.4,0,.2,1);
  border:2px solid transparent;
}
.auth-form input:focus{
  border-color:#0071e3;background:#fff;
  box-shadow:0 0 0 3px rgba(0,113,227,.12);
}
.auth-form input::placeholder{color:#c7c7cc}
.auth-hint{font-size:11px;color:#86868b;margin-top:5px;font-style:italic}
.auth-error{
  background:linear-gradient(135deg,#fff5f5,#ffe8e8);
  color:#e53e3e;
  padding:12px 16px;border-radius:10px;
  font-size:13px;margin-bottom:16px;
  animation:fadeIn .3s ease;
  border:1px solid rgba(229,62,62,.1);
}

/* ===== BUTTONS ===== */
.btn-primary{
  width:100%;height:48px;
  background:#1d1d1f;color:#fff;
  border-radius:12px;font-size:15px;
  font-weight:600;letter-spacing:.3px;
  transition:all .35s cubic-bezier(.4,0,.2,1);
  display:flex;align-items:center;justify-content:center;
  position:relative;overflow:hidden;
}
.btn-primary::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(255,255,255,.1),transparent);
  opacity:0;transition:opacity .3s;
}
.btn-primary:hover{
  background:#333;transform:translateY(-1px);
  box-shadow:0 6px 20px rgba(0,0,0,.2);
}
.btn-primary:hover::after{opacity:1}
.btn-primary:active{transform:translateY(0);box-shadow:0 2px 8px rgba(0,0,0,.15)}
.btn-primary:disabled{opacity:.4;pointer-events:none}
.btn-guest{
  width:100%;height:44px;
  background:transparent;color:#86868b;
  font-size:13px;margin-top:12px;
  border-radius:12px;
  transition:all .3s ease;
  letter-spacing:.3px;
}
.btn-guest:hover{color:#1d1d1f;background:rgba(0,0,0,.04)}
.btn-install{
  width:100%;height:46px;
  background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);
  color:#fff;border-radius:12px;
  font-size:14px;font-weight:600;
  margin-top:16px;
  transition:all .35s cubic-bezier(.4,0,.2,1);
  display:flex;align-items:center;justify-content:center;gap:8px;
  box-shadow:0 4px 16px rgba(102,126,234,.3);
  letter-spacing:.3px;
}
.btn-install:hover{
  transform:translateY(-2px);
  box-shadow:0 8px 28px rgba(102,126,234,.45);
}
.btn-install:active{transform:translateY(0)}

/* ===== HOME THREE COLUMNS ===== */
.home-layout{
  display:grid;
  grid-template-columns:300px 1fr 340px;
  gap:20px;
  animation:fadeIn .5s ease;
}
@media(max-width:1200px){
  .home-layout{grid-template-columns:260px 1fr 300px;gap:16px}
}
@media(max-width:1100px){
  .home-layout{grid-template-columns:1fr;gap:16px}
  .home-left,.home-right{display:none}
  .home-left.mobile-show,.home-right.mobile-show{display:block}
}

/* ===== PANEL (shared) ===== */
.panel{
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(12px);
  border-radius:18px;
  box-shadow:0 0 0 .5px rgba(0,0,0,.04),0 4px 24px rgba(0,0,0,.04);
  overflow:hidden;
  transition:all .3s ease;
}
.panel:hover{box-shadow:0 0 0 .5px rgba(0,0,0,.06),0 8px 32px rgba(0,0,0,.06)}
.panel-header{
  padding:16px 20px;
  font-size:15px;font-weight:700;
  border-bottom:.5px solid rgba(0,0,0,.06);
  display:flex;align-items:center;justify-content:space-between;
  letter-spacing:.3px;
}
.panel-body{padding:0;max-height:calc(100vh - 160px);overflow-y:auto}

/* Announcements (left) */
.home-left{animation:slideInLeft .6s cubic-bezier(.16,1,.3,1)}
.announcement-item{
  padding:16px 20px;
  border-bottom:.5px solid rgba(0,0,0,.04);
  transition:all .3s ease;
  cursor:default;
  position:relative;
}
.announcement-item::before{
  content:'';position:absolute;left:0;top:0;bottom:0;width:3px;
  background:linear-gradient(180deg,#0071e3,#5856d6);
  border-radius:0 2px 2px 0;opacity:0;transition:opacity .3s;
}
.announcement-item:hover{background:rgba(0,0,0,.02)}
.announcement-item:hover::before{opacity:1}
.announcement-item:last-child{border-bottom:none}
.announcement-title{font-size:14px;font-weight:700;margin-bottom:4px;color:#1d1d1f}
.announcement-content{font-size:13px;color:#424245;line-height:1.6}
.announcement-img{
  margin-top:10px;border-radius:10px;max-height:200px;
  object-fit:cover;width:100%;cursor:pointer;
  transition:all .3s ease;
}
.announcement-img:hover{transform:scale(1.01);box-shadow:0 4px 16px rgba(0,0,0,.1)}
.announcement-time{font-size:11px;color:#86868b;margin-top:8px}
.announcement-form{padding:16px 20px;border-top:.5px solid rgba(0,0,0,.06)}
.announcement-form textarea{
  width:100%;height:64px;resize:none;
  background:#f5f5f7;border-radius:10px;
  padding:10px 12px;font-size:13px;
  border:1.5px solid transparent;
  transition:all .35s cubic-bezier(.4,0,.2,1);
}
.announcement-form textarea:focus{
  border-color:rgba(0,113,227,.4);background:#fff;
  box-shadow:0 0 0 3px rgba(0,113,227,.08);
}

/* ===== ANNOUNCEMENTS PAGE (dedicated page for mobile) ===== */
.announcements-page{
  max-width:700px;
  margin:0 auto;
  animation:fadeInUp .6s cubic-bezier(.16,1,.3,1);
}
.announcements-page .panel-body{
  max-height:none;
}

/* ===== POST CARD ===== */
.home-center{animation:fadeInUp .6s cubic-bezier(.16,1,.3,1)}
.post-card{
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(12px);
  border-radius:18px;
  box-shadow:0 0 0 .5px rgba(0,0,0,.04),0 2px 16px rgba(0,0,0,.03);
  margin-bottom:16px;
  transition:all .4s cubic-bezier(.4,0,.2,1);
  overflow:hidden;
  animation:fadeIn .5s ease both;
}
.post-card:nth-child(1){animation-delay:.05s}
.post-card:nth-child(2){animation-delay:.1s}
.post-card:nth-child(3){animation-delay:.15s}
.post-card:nth-child(4){animation-delay:.2s}
.post-card:nth-child(5){animation-delay:.25s}
.post-card:hover{
  box-shadow:0 0 0 .5px rgba(0,0,0,.06),0 8px 32px rgba(0,0,0,.08);
  transform:translateY(-2px);
}
.post-header{
  display:flex;align-items:center;
  padding:18px 22px 0;gap:12px;
}
.post-avatar{
  width:40px;height:40px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:15px;color:#fff;flex-shrink:0;overflow:hidden;
  font-weight:700;
  box-shadow:0 2px 8px rgba(0,0,0,.12);
  transition:transform .3s ease;
}
.post-avatar:hover{transform:scale(1.08)}
.post-meta{flex:1}
.post-username{
  font-size:14px;font-weight:700;color:#1d1d1f;cursor:pointer;
  transition:color .25s;
}
.post-username:hover{color:#0071e3}
.post-time{font-size:11px;color:#86868b;margin-top:2px}
.post-role-badge{
  font-size:10px;padding:2px 8px;border-radius:10px;
  margin-left:6px;font-weight:600;letter-spacing:.3px;
}
.post-role-badge.admin{
  background:linear-gradient(135deg,#fff3e0,#ffe0b2);color:#e65100;
}
.post-role-badge.superadmin{
  background:linear-gradient(135deg,#fce4ec,#f8bbd0);color:#c62828;
}
.post-body{padding:14px 22px 18px}
.post-title{
  font-size:17px;font-weight:800;margin-bottom:8px;color:#1d1d1f;
  line-height:1.4;
}
.post-content{
  font-size:14px;color:#424245;line-height:1.8;
  word-break:break-word;white-space:pre-wrap;
}
.post-media-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(140px,1fr));
  gap:8px;margin-top:14px;
}
.post-media-grid.single{grid-template-columns:1fr}
.post-media-grid img{
  width:100%;border-radius:12px;cursor:pointer;
  transition:all .35s cubic-bezier(.4,0,.2,1);
  object-fit:cover;aspect-ratio:4/3;
}
.post-media-grid.single img{aspect-ratio:auto;max-height:400px}
.post-media-grid img:hover{transform:scale(1.015);box-shadow:0 4px 20px rgba(0,0,0,.1)}
.post-media-grid video{
  width:100%;border-radius:12px;max-height:360px;
  background:#000;
}
.post-actions{
  display:flex;align-items:center;
  padding:0 22px 16px;gap:4px;
}
.post-action{
  display:flex;align-items:center;gap:6px;
  padding:8px 16px;border-radius:20px;
  font-size:13px;color:#86868b;
  transition:all .3s cubic-bezier(.4,0,.2,1);
  font-weight:500;
}
.post-action:hover{background:rgba(0,0,0,.04);color:#1d1d1f}
.post-action.liked{color:#ff3b30}
.post-action.liked:hover{background:rgba(255,59,48,.06)}
.post-action.liked .icon{animation:heartBeat .6s ease}
.post-action .icon{font-size:17px;transition:transform .3s}
.post-action:active .icon{transform:scale(.85)}
.post-tag{
  display:inline-flex;align-items:center;
  font-size:11px;
  padding:3px 10px;border-radius:20px;
  margin-left:auto;font-weight:600;
  letter-spacing:.3px;
}
.post-tag.public{
  background:linear-gradient(135deg,#e8f5e9,#c8e6c9);color:#2e7d32;
}
.post-tag.topic{
  background:linear-gradient(135deg,#e3f2fd,#bbdefb);color:#1565c0;
}
.post-delete{
  margin-left:8px;padding:6px 10px;
  border-radius:8px;font-size:13px;color:#ff3b30;
  transition:all .25s ease;opacity:.6;
}
.post-delete:hover{background:rgba(255,59,48,.08);opacity:1}

/* ===== FAB ===== */
.fab{
  position:fixed;bottom:32px;right:32px;
  width:56px;height:56px;
  background:linear-gradient(135deg,#1d1d1f,#3a3a3c);
  color:#fff;
  border-radius:50%;font-size:22px;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 4px 20px rgba(0,0,0,.25),0 0 0 .5px rgba(255,255,255,.1) inset;
  transition:all .35s cubic-bezier(.4,0,.2,1);
  z-index:100;
}
.fab:hover{
  transform:scale(1.1) translateY(-2px);
  box-shadow:0 8px 32px rgba(0,0,0,.35);
}
.fab:active{transform:scale(.95)}

/* ===== CHAT (right) ===== */
.home-right{animation:slideInRight .6s cubic-bezier(.16,1,.3,1)}
.chat-container{
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(12px);
  border-radius:18px;
  box-shadow:0 0 0 .5px rgba(0,0,0,.04),0 4px 24px rgba(0,0,0,.04);
  height:calc(100vh - 92px);
  display:flex;overflow:hidden;
  transition:all .3s ease;
}
.chat-container:hover{box-shadow:0 0 0 .5px rgba(0,0,0,.06),0 8px 32px rgba(0,0,0,.06)}
.chat-sidebar{
  width:100%;
  border-right:.5px solid rgba(0,0,0,.06);
  display:flex;flex-direction:column;
}
.chat-sidebar.has-conv{width:110px}
.chat-search{padding:12px}
.chat-search input{
  width:100%;height:32px;
  background:rgba(0,0,0,.05);border-radius:16px;
  padding:0 12px;font-size:12px;
  transition:all .3s;border:1.5px solid transparent;
}
.chat-search input:focus{border-color:rgba(0,113,227,.3);background:rgba(255,255,255,.9)}
.chat-user-list{flex:1;overflow-y:auto}
.chat-user-item{
  display:flex;align-items:center;gap:8px;
  padding:10px 12px;cursor:pointer;
  transition:all .25s ease;
  border-bottom:.5px solid rgba(0,0,0,.03);
  position:relative;
}
.chat-user-item:hover{background:rgba(0,0,0,.03)}
.chat-user-item.active{background:rgba(0,113,227,.06)}
.chat-user-avatar{
  width:34px;height:34px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:12px;color:#fff;flex-shrink:0;font-weight:600;
  box-shadow:0 1px 4px rgba(0,0,0,.1);
}
.chat-user-info{flex:1;min-width:0}
.chat-user-name{font-size:12px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chat-user-role{font-size:10px;color:#86868b}
.chat-user-unread{
  min-width:18px;height:18px;
  background:linear-gradient(135deg,#ff3b30,#ff6259);
  color:#fff;
  font-size:10px;border-radius:9px;
  display:flex;align-items:center;justify-content:center;
  padding:0 4px;font-weight:600;
  box-shadow:0 2px 6px rgba(255,59,48,.3);
}
.chat-main{flex:1;display:flex;flex-direction:column;display:none}
.chat-main.active{display:flex}
.chat-msg-header{
  padding:12px 16px;border-bottom:.5px solid rgba(0,0,0,.06);
  font-size:14px;font-weight:700;
  display:flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.5);
}
.chat-msg-back{font-size:18px;cursor:pointer;display:none;transition:transform .2s}
.chat-msg-back:hover{transform:translateX(-2px)}
.chat-messages{flex:1;overflow-y:auto;padding:16px}
.chat-msg{margin-bottom:12px;display:flex;flex-direction:column;animation:fadeIn .3s ease}
.chat-msg.sent{align-items:flex-end}
.chat-msg.received{align-items:flex-start}
.chat-msg-bubble{
  max-width:80%;padding:10px 14px;
  border-radius:16px;font-size:13px;
  line-height:1.5;word-break:break-word;
  transition:transform .2s;
}
.chat-msg-bubble:hover{transform:scale(1.01)}
.chat-msg.sent .chat-msg-bubble{
  background:linear-gradient(135deg,#1d1d1f,#3a3a3c);
  color:#fff;border-bottom-right-radius:4px;
}
.chat-msg.received .chat-msg-bubble{
  background:#f0f0f0;color:#1d1d1f;border-bottom-left-radius:4px;
}
.chat-msg-bubble img{max-width:200px;border-radius:10px;margin-top:6px;cursor:pointer}
.chat-msg-bubble video{max-width:200px;border-radius:10px;margin-top:6px}
.chat-msg-time{font-size:10px;color:#86868b;margin-top:3px;padding:0 4px}
.chat-input-area{padding:12px;border-top:.5px solid rgba(0,0,0,.06);background:rgba(255,255,255,.5)}
.chat-input-hint{font-size:10px;color:#c7c7cc;margin-bottom:6px;text-align:center}
.chat-input-row{display:flex;gap:8px;align-items:flex-end}
.chat-input-row textarea{
  flex:1;height:36px;max-height:100px;
  resize:none;background:#f5f5f7;
  border-radius:18px;padding:8px 14px;
  font-size:13px;border:1.5px solid transparent;
  transition:all .3s;
}
.chat-input-row textarea:focus{
  background:#fff;border-color:rgba(0,113,227,.3);
  box-shadow:0 0 0 3px rgba(0,113,227,.06);
}
.chat-input-row .send-btn{
  width:36px;height:36px;border-radius:50%;
  background:linear-gradient(135deg,#1d1d1f,#3a3a3c);
  color:#fff;
  font-size:16px;display:flex;align-items:center;justify-content:center;
  flex-shrink:0;transition:all .3s cubic-bezier(.4,0,.2,1);
  box-shadow:0 2px 8px rgba(0,0,0,.15);
}
.chat-input-row .send-btn:hover{transform:scale(1.08);box-shadow:0 4px 12px rgba(0,0,0,.2)}
.chat-input-row .attach-btn{
  width:36px;height:36px;border-radius:50%;
  background:#f0f0f0;color:#666;
  font-size:16px;display:flex;align-items:center;justify-content:center;
  flex-shrink:0;transition:all .25s;cursor:pointer;
}
.chat-input-row .attach-btn:hover{background:#e5e5ea;transform:scale(1.05)}

/* ===== MESSAGES PAGE (dedicated full-page chat) ===== */
.messages-page{
  max-width:900px;
  margin:0 auto;
  padding-top:0;
  animation:fadeInUp .6s cubic-bezier(.16,1,.3,1);
}
.messages-page .chat-container{
  height:calc(100vh - 120px);
  border-radius:18px;
}
/* On the full page, sidebar is wider */
.messages-page .chat-sidebar{
  width:100%;
}
.messages-page .chat-sidebar.has-conv{
  width:260px;
}
.messages-page .chat-msg-back{
  display:block !important;
}

/* ===== CREATE POST PAGE ===== */
.create-post-page{
  max-width:700px;margin:20px auto;
  animation:fadeInUp .6s cubic-bezier(.16,1,.3,1);
}
.create-post-card{
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(12px);
  border-radius:24px;
  padding:36px;
  box-shadow:0 0 0 .5px rgba(0,0,0,.04),0 8px 40px rgba(0,0,0,.06);
}
.create-post-card h2{
  font-size:22px;font-weight:800;margin-bottom:28px;color:#1d1d1f;
  letter-spacing:.3px;
}
.form-group{margin-bottom:22px}
.form-group label{
  display:block;font-size:12px;color:#86868b;
  margin-bottom:6px;font-weight:600;
  text-transform:uppercase;letter-spacing:.5px;
}
.form-group input,.form-group textarea,.form-group select{
  width:100%;
  background:#f5f5f7;border-radius:12px;
  padding:13px 16px;font-size:14px;
  border:2px solid transparent;
  transition:all .35s cubic-bezier(.4,0,.2,1);
}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{
  border-color:#0071e3;background:#fff;
  box-shadow:0 0 0 3px rgba(0,113,227,.1);
}
.form-group textarea{min-height:160px;resize:vertical;line-height:1.7}
.form-row{display:flex;gap:16px}
.form-row .form-group{flex:1}
.media-preview{display:flex;flex-wrap:wrap;gap:10px;margin-top:10px}
.media-preview-item{
  position:relative;width:80px;height:80px;border-radius:10px;overflow:hidden;
  box-shadow:0 2px 8px rgba(0,0,0,.1);
}
.media-preview-item img,.media-preview-item video{width:100%;height:100%;object-fit:cover}
.media-preview-item .remove-media{
  position:absolute;top:4px;right:4px;
  width:22px;height:22px;border-radius:50%;
  background:rgba(0,0,0,.65);color:#fff;
  font-size:12px;display:flex;align-items:center;justify-content:center;
  cursor:pointer;transition:all .2s;
  backdrop-filter:blur(4px);
}
.media-preview-item .remove-media:hover{background:rgba(255,59,48,.85);transform:scale(1.1)}
.btn-upload{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 18px;background:#f5f5f7;
  border-radius:10px;font-size:13px;color:#424245;
  transition:all .3s;cursor:pointer;font-weight:500;
}
.btn-upload:hover{background:#e8e8ed;transform:translateY(-1px)}

/* ===== TOPICS PAGE ===== */
.topics-page{animation:fadeIn .5s ease}
.topics-tabs{
  display:flex;gap:4px;
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(12px);
  border-radius:14px;
  padding:4px;margin-bottom:24px;
  box-shadow:0 0 0 .5px rgba(0,0,0,.04),0 4px 16px rgba(0,0,0,.04);
  overflow-x:auto;
  flex-wrap:wrap;
}
.topics-tab{
  padding:10px 20px;font-size:14px;
  border-radius:10px;color:#86868b;
  transition:all .35s cubic-bezier(.4,0,.2,1);
  white-space:nowrap;font-weight:500;cursor:pointer;
}
.topics-tab.active{
  background:#1d1d1f;color:#fff;
  box-shadow:0 2px 8px rgba(0,0,0,.15);
}
.topics-tab:hover:not(.active){background:rgba(0,0,0,.04);color:#1d1d1f}
.topics-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(250px,1fr));
  gap:18px;
}
.topic-card{
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(12px);
  border-radius:16px;
  box-shadow:0 0 0 .5px rgba(0,0,0,.04),0 4px 16px rgba(0,0,0,.04);
  overflow:hidden;cursor:pointer;
  transition:all .35s cubic-bezier(.4,0,.2,1);
}
.topic-card:hover{
  transform:translateY(-4px);
  box-shadow:0 0 0 .5px rgba(0,0,0,.06),0 12px 36px rgba(0,0,0,.1);
}
.topic-card-img{
  height:130px;background:linear-gradient(135deg,#e5e5ea,#d1d1d6);
  display:flex;align-items:center;justify-content:center;
  font-size:40px;color:rgba(0,0,0,.15);overflow:hidden;
  position:relative;
}
.topic-card-img::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(180deg,transparent 60%,rgba(0,0,0,.05));
}
.topic-card-img img{width:100%;height:100%;object-fit:cover}
.topic-card-body{padding:16px 18px}
.topic-card-name{font-size:15px;font-weight:700;color:#1d1d1f;margin-bottom:4px}
.topic-card-info{font-size:12px;color:#86868b}
.create-topic-btn{
  background:rgba(255,255,255,.7);
  backdrop-filter:blur(12px);
  border-radius:16px;
  box-shadow:0 0 0 .5px rgba(0,0,0,.04);
  display:flex;align-items:center;justify-content:center;
  min-height:195px;cursor:pointer;
  transition:all .35s cubic-bezier(.4,0,.2,1);
  border:2px dashed rgba(0,0,0,.12);
  font-size:14px;color:#86868b;
  flex-direction:column;gap:8px;
}
.create-topic-btn:hover{
  border-color:rgba(0,113,227,.3);color:#0071e3;
  background:rgba(0,113,227,.03);transform:translateY(-2px);
}

/* ===== MY PAGE ===== */
.my-page{
  max-width:620px;margin:0 auto;
  animation:fadeInUp .6s cubic-bezier(.16,1,.3,1);
}
.profile-card{
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(12px);
  border-radius:24px;
  padding:36px;text-align:center;
  box-shadow:0 0 0 .5px rgba(0,0,0,.04),0 8px 40px rgba(0,0,0,.06);
  margin-bottom:20px;
  position:relative;
  overflow:hidden;
}
.profile-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:100px;
  background:linear-gradient(135deg,#f5f5f7,#e8e8ed);
  z-index:0;
}
.profile-avatar{
  width:88px;height:88px;border-radius:50%;
  margin:0 auto 16px;
  display:flex;align-items:center;justify-content:center;
  font-size:32px;color:#fff;font-weight:700;
  position:relative;z-index:1;
  box-shadow:0 4px 16px rgba(0,0,0,.12),0 0 0 4px #fff;
  transition:transform .4s cubic-bezier(.4,0,.2,1);
}
.profile-avatar:hover{transform:scale(1.05)}
.profile-username{
  font-size:22px;font-weight:800;color:#1d1d1f;position:relative;z-index:1;
}
.profile-role{
  font-size:13px;color:#86868b;margin-top:4px;position:relative;z-index:1;
  font-weight:500;
}
.profile-stats{
  display:flex;justify-content:center;gap:28px;
  margin-top:24px;position:relative;z-index:1;
}
.profile-stat{text-align:center;cursor:pointer;transition:transform .25s}
.profile-stat:hover{transform:translateY(-2px)}
.profile-stat:hover .stat-value{color:#0071e3}
.stat-value{
  font-size:22px;font-weight:800;color:#1d1d1f;
  transition:all .3s;
}
.stat-label{font-size:12px;color:#86868b;margin-top:2px;font-weight:500}
.profile-menu{
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(12px);
  border-radius:18px;
  box-shadow:0 0 0 .5px rgba(0,0,0,.04),0 4px 16px rgba(0,0,0,.04);
  overflow:hidden;
}
.profile-menu-item{
  display:flex;align-items:center;gap:14px;
  padding:16px 22px;
  border-bottom:.5px solid rgba(0,0,0,.04);
  font-size:14px;color:#1d1d1f;
  transition:all .25s ease;cursor:pointer;
  font-weight:500;
}
.profile-menu-item:hover{background:rgba(0,0,0,.03)}
.profile-menu-item:active{background:rgba(0,0,0,.05)}
.profile-menu-item:last-child{border-bottom:none}
.profile-menu-item .icon{font-size:18px;width:30px;text-align:center}
.profile-menu-item .arrow{margin-left:auto;color:#c7c7cc;font-size:16px}
.profile-menu-item.danger{color:#ff3b30}
.profile-menu-item.danger:hover{background:rgba(255,59,48,.04)}

/* ===== MODAL ===== */
.modal-overlay{
  position:fixed;top:0;left:0;right:0;bottom:0;
  background:rgba(0,0,0,.45);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  z-index:2000;
  display:flex;align-items:center;justify-content:center;
  animation:fadeIn .2s ease;
}
.modal-box{
  background:#fff;border-radius:24px;
  padding:32px;width:460px;max-width:90vw;
  max-height:85vh;overflow-y:auto;
  box-shadow:0 24px 80px rgba(0,0,0,.2),0 0 0 .5px rgba(0,0,0,.05);
  animation:scaleIn .35s cubic-bezier(.16,1,.3,1);
}
.modal-box h3{
  font-size:19px;font-weight:800;margin-bottom:20px;color:#1d1d1f;
}
.modal-actions{display:flex;gap:12px;margin-top:24px;justify-content:flex-end}
.btn-secondary{
  padding:10px 22px;border-radius:12px;
  background:#f5f5f7;color:#1d1d1f;
  font-size:14px;font-weight:600;
  transition:all .3s;
}
.btn-secondary:hover{background:#e8e8ed;transform:translateY(-1px)}
.btn-danger{
  padding:10px 22px;border-radius:12px;
  background:linear-gradient(135deg,#ff3b30,#ff6259);
  color:#fff;
  font-size:14px;font-weight:600;
  transition:all .3s;
  box-shadow:0 2px 8px rgba(255,59,48,.3);
}
.btn-danger:hover{transform:translateY(-1px);box-shadow:0 4px 16px rgba(255,59,48,.4)}
.btn-sm{
  padding:7px 16px;border-radius:8px;
  font-size:12px;font-weight:600;
  transition:all .25s;letter-spacing:.2px;
}
.btn-dark{
  background:#1d1d1f;color:#fff;
  box-shadow:0 1px 4px rgba(0,0,0,.1);
}
.btn-dark:hover{background:#333;transform:translateY(-1px);box-shadow:0 3px 10px rgba(0,0,0,.15)}
.btn-light{background:#f0f0f0;color:#1d1d1f}
.btn-light:hover{background:#e5e5ea;transform:translateY(-1px)}

/* ===== SHARE MENU ===== */
.share-menu{
  display:flex;gap:16px;padding:16px 0;justify-content:center;flex-wrap:wrap;
}
.share-btn{
  display:flex;flex-direction:column;align-items:center;gap:8px;
  padding:14px 18px;border-radius:14px;
  transition:all .3s cubic-bezier(.4,0,.2,1);
  cursor:pointer;font-size:12px;color:#424245;font-weight:500;
}
.share-btn:hover{background:rgba(0,0,0,.04);transform:translateY(-2px)}
.share-btn .share-icon{
  width:48px;height:48px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  font-size:20px;color:#fff;
  box-shadow:0 4px 12px rgba(0,0,0,.15);
  transition:transform .3s;
}
.share-btn:hover .share-icon{transform:scale(1.08)}
.share-wechat .share-icon{background:linear-gradient(135deg,#07c160,#06ad56)}
.share-qq .share-icon{background:linear-gradient(135deg,#12b7f5,#0d9fda)}
.share-telegram .share-icon{background:linear-gradient(135deg,#0088cc,#0077b5)}
.share-internal .share-icon{background:linear-gradient(135deg,#1d1d1f,#3a3a3c)}
.share-copy .share-icon{background:linear-gradient(135deg,#86868b,#636366)}

/* ===== COMMENTS SECTION ===== */
.comments-section{
  border-top:.5px solid rgba(0,0,0,.06);
  padding:16px 22px;
  animation:fadeIn .3s ease;
}
.comment-item{
  display:flex;gap:10px;
  padding:12px 0;
  border-bottom:.5px solid rgba(0,0,0,.03);
  animation:fadeIn .3s ease;
}
.comment-item:last-child{border-bottom:none}
.comment-avatar{
  width:30px;height:30px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:11px;color:#fff;flex-shrink:0;font-weight:600;
  box-shadow:0 1px 4px rgba(0,0,0,.1);
}
.comment-body{flex:1}
.comment-author{font-size:12px;font-weight:700;color:#1d1d1f}
.comment-text{font-size:13px;color:#424245;margin-top:3px;line-height:1.5}
.comment-time{font-size:10px;color:#86868b;margin-top:3px}
.comment-form{display:flex;gap:8px;margin-top:12px}
.comment-form input{
  flex:1;height:38px;
  background:#f5f5f7;border-radius:19px;
  padding:0 16px;font-size:13px;
  border:1.5px solid transparent;
  transition:all .3s;
}
.comment-form input:focus{border-color:rgba(0,113,227,.3);background:#fff}
.comment-form button{
  padding:0 18px;height:38px;
  background:#1d1d1f;color:#fff;
  border-radius:19px;font-size:13px;font-weight:600;
  transition:all .3s;
}
.comment-form button:hover{background:#333;transform:translateY(-1px)}

/* ===== USER LIST ===== */
.user-list-item{
  display:flex;align-items:center;gap:12px;
  padding:12px 0;
  border-bottom:.5px solid rgba(0,0,0,.04);
  transition:all .25s;
}
.user-list-item:hover{background:rgba(0,0,0,.02);border-radius:10px;padding:12px 8px}
.user-list-item:last-child{border-bottom:none}
.user-list-avatar{
  width:38px;height:38px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:14px;color:#fff;flex-shrink:0;font-weight:600;
  box-shadow:0 2px 6px rgba(0,0,0,.1);
}
.user-list-info{flex:1}
.user-list-name{font-size:14px;font-weight:700;color:#1d1d1f}
.user-list-role{font-size:11px;color:#86868b;font-weight:500}
.user-list-actions{display:flex;gap:8px}

/* ===== TOPIC DETAIL ===== */
.topic-header{
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(12px);
  border-radius:20px;
  overflow:hidden;margin-bottom:20px;
  box-shadow:0 0 0 .5px rgba(0,0,0,.04),0 8px 32px rgba(0,0,0,.06);
}
.topic-banner{
  height:200px;
  background:linear-gradient(135deg,#e5e5ea,#d1d1d6);
  overflow:hidden;position:relative;
}
.topic-banner::after{
  content:'';position:absolute;bottom:0;left:0;right:0;height:60px;
  background:linear-gradient(transparent,rgba(0,0,0,.05));
}
.topic-banner img{width:100%;height:100%;object-fit:cover}
.topic-info{padding:22px;display:flex;align-items:center;justify-content:space-between}
.topic-name{font-size:22px;font-weight:800;color:#1d1d1f}
.topic-detail-meta{font-size:13px;color:#86868b;margin-top:4px;font-weight:500}

/* ===== SEARCH RESULTS ===== */
.search-results{animation:fadeIn .4s ease}
.search-section{margin-bottom:28px}
.search-section h3{
  font-size:16px;font-weight:800;margin-bottom:14px;color:#1d1d1f;
  letter-spacing:.3px;
}

/* ===== NOTIFICATION LIST ===== */
.notif-item{
  display:flex;align-items:center;gap:12px;
  padding:14px 18px;
  border-bottom:.5px solid rgba(0,0,0,.04);
  transition:all .25s ease;cursor:pointer;
}
.notif-item:hover{background:rgba(0,0,0,.02)}
.notif-item.unread{
  background:rgba(0,113,227,.03);
  border-left:3px solid #0071e3;
}
.notif-icon{font-size:22px}
.notif-content{flex:1;font-size:13px;color:#424245;line-height:1.4}
.notif-time{font-size:11px;color:#86868b;flex-shrink:0}

/* ===== ADMIN SETTINGS ===== */
.admin-page{
  max-width:720px;margin:0 auto;
  animation:fadeInUp .6s cubic-bezier(.16,1,.3,1);
}
.admin-card{
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(12px);
  border-radius:18px;
  box-shadow:0 0 0 .5px rgba(0,0,0,.04),0 4px 16px rgba(0,0,0,.04);
  margin-bottom:18px;overflow:hidden;
  transition:all .3s ease;
}
.admin-card:hover{box-shadow:0 0 0 .5px rgba(0,0,0,.06),0 8px 28px rgba(0,0,0,.06)}
.admin-card-header{
  padding:18px 22px;font-weight:700;
  border-bottom:.5px solid rgba(0,0,0,.06);
  font-size:15px;
}
.admin-card-body{padding:22px}

/* ===== LOADING & EMPTY ===== */
.loading{
  display:flex;align-items:center;justify-content:center;
  padding:48px;color:#86868b;font-size:14px;
  gap:10px;
}
.spinner{
  width:22px;height:22px;
  border:2.5px solid rgba(0,0,0,.08);
  border-top-color:#1d1d1f;border-radius:50%;
  animation:spin .7s linear infinite;
}
.empty-state{
  text-align:center;padding:48px 24px;
  color:#86868b;font-size:14px;font-weight:500;
}
.empty-state .empty-icon{
  font-size:52px;margin-bottom:14px;
  animation:float 3s ease infinite;
}

/* ===== TOAST ===== */
.toast{
  position:fixed;top:64px;right:20px;z-index:3000;
  padding:14px 22px;border-radius:14px;
  font-size:13px;color:#fff;font-weight:600;
  animation:slideInRight .4s cubic-bezier(.16,1,.3,1);
  box-shadow:0 8px 28px rgba(0,0,0,.2);
  backdrop-filter:blur(8px);
  transition:all .4s ease;
  letter-spacing:.2px;
}
.toast.success{background:rgba(52,199,89,.95)}
.toast.error{background:rgba(255,59,48,.95)}
.toast.info{background:rgba(29,29,31,.95)}

/* ===== IMAGE LIGHTBOX ===== */
.lightbox{
  position:fixed;top:0;left:0;right:0;bottom:0;
  background:rgba(0,0,0,.92);z-index:3000;
  display:flex;align-items:center;justify-content:center;
  animation:fadeIn .3s ease;cursor:pointer;
  backdrop-filter:blur(20px);
}
.lightbox img{
  max-width:92vw;max-height:92vh;border-radius:12px;
  object-fit:contain;
  animation:scaleIn .35s cubic-bezier(.16,1,.3,1);
  box-shadow:0 20px 60px rgba(0,0,0,.5);
}
  /* =============================================
   MOBILE FIX - 追加到 style.css 末尾
   ============================================= */

/* 修复被截断的 lightbox 样式 */
.lightbox img {
  max-width: 92vw;
  max-height: 92vh;
  border-radius: 12px;
  object-fit: contain;
  animation: scaleIn .35s cubic-bezier(.16, 1, .3, 1);
  box-shadow: 0 20px 60px rgba(0,0,0,.5);
}

/* ===== 手机底部导航栏 ===== */
.mobile-tabs {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 56px;
  background: rgba(255,255,255,.96);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-top: .5px solid rgba(0,0,0,.1);
  z-index: 1000;
  justify-content: space-around;
  align-items: center;
  padding: 0;
  padding-bottom: env(safe-area-inset-bottom, 0);
}

.mobile-tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1px;
  font-size: 10px;
  color: #86868b;
  padding: 4px 0;
  flex: 1;
  cursor: pointer;
  transition: color .2s;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.mobile-tab.active {
  color: #1d1d1f;
  font-weight: 700;
}

.mobile-tab .tab-icon {
  font-size: 22px;
  line-height: 1;
  display: block;
}

/* ===== 手机端专题入口快捷按钮 ===== */
.mobile-topics-shortcut {
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(12px);
  border-radius: 14px;
  padding: 14px 20px;
  margin-bottom: 14px;
  font-size: 14px;
  font-weight: 600;
  color: #0071e3;
  cursor: pointer;
  box-shadow: 0 0 0 .5px rgba(0,0,0,.04), 0 2px 12px rgba(0,0,0,.04);
  transition: all .3s;
  text-align: center;
}
.mobile-topics-shortcut:hover,
.mobile-topics-shortcut:active {
  background: rgba(0,113,227,.06);
  transform: translateY(-1px);
}

/* ===== 手机端响应式核心修复 ===== */
@media (max-width: 1100px) {

  /* 显示底部Tab、隐藏桌面导航 */
  .mobile-tabs {
    display: flex !important;
  }
  .navbar-links {
    display: none !important;
  }
  .nav-search {
    display: none !important;
  }
  .nav-right {
    margin-left: auto;
  }

  /* ★ 关键：内容区域加底部安全距离，防止被Tab遮挡 */
  .main-content {
    padding-bottom: 72px !important;
  }

  /* FAB 按钮上移，避开底部Tab */
  .fab {
    bottom: 76px !important;
    right: 16px !important;
    width: 50px;
    height: 50px;
    font-size: 20px;
  }

  /* 首页三栏 → 单栏 */
  .home-layout {
    grid-template-columns: 1fr !important;
    gap: 14px;
  }
  .home-left,
  .home-right {
    display: none !important;
  }

  /* Navbar Logo 缩短 */
  .navbar-logo span {
    font-size: 14px;
  }

  /* 帖子卡片手机适配 */
  .post-header {
    padding: 14px 16px 0;
  }
  .post-body {
    padding: 10px 16px 14px;
  }
  .post-actions {
    padding: 0 16px 12px;
  }
  .post-media-grid {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 6px;
  }

  /* 创建帖子页面 */
  .create-post-card {
    padding: 24px 18px;
    border-radius: 18px;
  }
  .create-post-card h2 {
    font-size: 18px;
  }

  /* 登录页 */
  .auth-card {
    padding: 32px 24px;
    border-radius: 20px;
  }

  /* 我的页面 */
  .profile-card {
    padding: 28px 20px;
    border-radius: 20px;
  }
  .profile-stats {
    gap: 16px;
  }
  .stat-value {
    font-size: 18px;
  }

  /* 专题页面 */
  .topics-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 12px;
  }
  .topic-card-img {
    height: 100px;
  }

  /* 专题详情 */
  .topic-banner {
    height: 140px;
  }
  .topic-info {
    padding: 16px;
    flex-direction: column;
    gap: 12px;
  }
  .topic-name {
    font-size: 18px;
  }

  /* Modal 手机优化 */
  .modal-box {
    width: 94vw;
    padding: 24px 20px;
    border-radius: 20px;
    max-height: 80vh;
  }

  /* Toast 位置 */
  .toast {
    top: auto;
    bottom: 72px;
    right: 12px;
    left: 12px;
    text-align: center;
    border-radius: 12px;
  }
}

/* ===== 公告独立页面 (手机) ===== */
.announcements-page {
  max-width: 700px;
  margin: 0 auto;
  animation: fadeInUp .5s cubic-bezier(.16,1,.3,1);
}
.announcements-page .panel {
  border-radius: 18px;
}
.announcements-page .panel-body {
  max-height: none !important;
}
.announcements-page .announcement-item {
  padding: 16px;
}

/* ===== 私信独立页面 ===== */
.messages-page {
  max-width: 900px;
  margin: 0 auto;
  animation: fadeInUp .5s cubic-bezier(.16,1,.3,1);
}

/* 私信全屏聊天容器 */
.chat-fullpage {
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(12px);
  border-radius: 18px;
  box-shadow: 0 0 0 .5px rgba(0,0,0,.04), 0 4px 24px rgba(0,0,0,.04);
  height: calc(100vh - 130px);
  display: flex;
  overflow: hidden;
}

/* ===== 手机端私信页面布局修复 ===== */
@media (max-width: 768px) {
  /* 私信页面 */
  .messages-page {
    padding: 10px !important;
  }

  .chat-fullpage {
    border-radius: 14px;
    height: calc(100vh - 124px);
    flex-direction: column;
  }

  /* 默认：显示用户列表，隐藏聊天 */
  .chat-fullpage .chat-sidebar {
    width: 100% !important;
    flex: 1;
    display: flex;
    flex-direction: column;
  }

  .chat-fullpage .chat-main {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10;
    background: #fff;
    border-radius: 14px;
    display: none;
  }
  .chat-fullpage .chat-main.active {
    display: flex !important;
  }

  /* 选中用户后：隐藏列表，显示聊天 */
  .chat-fullpage .chat-sidebar.has-conv {
    display: none !important;
  }

  /* 返回按钮在手机上始终可见 */
  .chat-fullpage .chat-msg-back {
    display: block !important;
    font-size: 22px;
    padding: 4px 8px;
  }

  /* 聊天容器相对定位 */
  .chat-fullpage {
    position: relative;
  }

  /* 公告页面手机适配 */
  .announcements-page {
    padding: 10px !important;
  }
}

/* ===== 小屏手机额外适配 (≤ 400px) ===== */
@media (max-width: 400px) {
  .mobile-tab {
    font-size: 9px;
  }
  .mobile-tab .tab-icon {
    font-size: 20px;
  }
  .navbar-logo span {
    font-size: 12px;
  }
  .topics-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
}
.shared-post-card{
  background:rgba(255,255,255,.92);
  color:#1d1d1f;
  border-radius:12px;
  padding:10px 12px;
  cursor:pointer;
  border:1px solid rgba(0,0,0,.08);
}
.chat-msg.sent .shared-post-card{background:rgba(255,255,255,.94)}
.shared-post-card:hover{transform:translateY(-1px)}
.shared-post-label{font-size:11px;color:#86868b;margin-bottom:4px}
.shared-post-title{font-size:13px;font-weight:700;line-height:1.4}
.shared-post-text{font-size:12px;color:#555;line-height:1.5;margin-top:4px;word-break:break-word}
.chat-text-only{margin-top:8px;white-space:pre-wrap;word-break:break-word}