* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', 'Ma Shan Zheng', sans-serif;
    background: linear-gradient(135deg, #ffffff 0%, #764ba200 100%);
    min-height: 100vh;
}

header {
    background-color: black;
    height: 80px;
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 999;
}

header ul {
    position: absolute;
    right: 5vw;
    top: 0;
    line-height: 80px;
    list-style: none;
}

h1 {
    color: white;
    position: absolute;
    left: 50px;
    top: 2px;
    width: 400px;
    height: 80px;
    line-height: 60px;
    background-image: url(../images/logo1.png);
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
    text-indent: -9999px;
}

header li {
    display: inline;
    margin-right: 4vw;
}

header a {
    color: white;
    text-decoration: none;
    font-family: "Microsoft YaHei", sans-serif;
}

header a:hover {
    text-decoration: underline;
}

.main-content {
    padding-top: 90px;
    padding-bottom: 50px;
    max-width: 1400px;
    margin: 0 auto;
    padding-left: 20px;
    padding-right: 20px;
    display: flex;
    gap: 20px;
}

.friends-sidebar {
    width: 280px;
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    height: calc(100vh - 120px);
    display: flex;
    flex-direction: column;
}

.friends-header {
    background: linear-gradient(135deg, #ffbe19 0%);
    color: white;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.friends-header h3 {
    font-size: 16px;
    font-weight: 500;
}

.add-friend-btn {
    background: rgba(255,255,255,0.2);
    border: none;
    color: white;
    padding: 6px 12px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.3s;
}

.add-friend-btn:hover {
    background: rgba(255,255,255,0.3);
    transform: scale(1.02);
}

.friends-search {
    padding: 10px;
    border-bottom: 1px solid #f0f0f0;
}

.friends-search input {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid #eee;
    border-radius: 8px;
    outline: none;
    font-size: 13px;
    background: #f8f8f8;
}

.friends-search input:focus {
    border-color: #ff8a8a;
    background: #fff;
}

.friends-list {
    flex: 1;
    overflow-y: auto;
    padding: 10px;
}

.friend-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s;
    margin-bottom: 5px;
    position: relative;
}

.friend-item:hover {
    background: #f5f5f5;
}

.friend-item.active {
    background: linear-gradient(135deg, #e3f2fd 0%, #fff9e6 100%);
    border-left: 3px solid #ff9800;
}

.friend-avatar {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: linear-gradient(135deg, #ffbe19 0%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
    overflow: hidden;
}

.friend-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.friend-info {
    flex: 1;
    position: relative;
}

.friend-name {
    font-weight: bold;
    color: #333;
    font-size: 14px;
}

.friend-tags {
    font-size: 11px;
    color: #999;
    margin-top: 4px;
}

.unread-badge {
    display: inline-block;
    background: #f44336;
    color: white;
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 12px;
    margin-left: 8px;
    font-weight: normal;
}

.delete-friend-btn {
    background: none;
    border: none;
    color: #f44336;
    cursor: pointer;
    font-size: 14px;
    opacity: 0;
    transition: opacity 0.3s;
    padding: 5px 8px;
    border-radius: 50%;
}

.friend-item:hover .delete-friend-btn {
    opacity: 1;
}

.delete-friend-btn:hover {
    background: rgba(244, 67, 54, 0.1);
    transform: scale(1.1);
}

.empty-friends {
    text-align: center;
    padding: 40px;
    color: #999;
    font-size: 14px;
}

.chat-area {
    flex: 1;
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
    height: calc(100vh - 120px);
}

.chat-header {
    background: linear-gradient(135deg, #ffbe19 0%);
    color: white;
    padding: 15px 20px;
    font-weight: 500;
    display: flex;
    align-items: center;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    background: #ffffff;
}

.message-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 12px;
    gap: 8px;
}

.message-item.me {
    flex-direction: row-reverse;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 6px;
    overflow: hidden;
    flex-shrink: 0;
}

.message-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.message-content {
    max-width: 70%;
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 15px;
    line-height: 1.5;
    position: relative;
    word-wrap: break-word;
}

.message-item:not(.me) .message-content {
    background: #FFFFFF;
    color: #333333;
    border: 1px solid #D3D3D3;
    border-top-left-radius: 0;
}

.message-item:not(.me) .message-content::before {
    content: "";
    position: absolute;
    left: -8px;
    top: 12px;
    width: 0;
    height: 0;
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
    border-right: 8px solid #FFFFFF;
}

.message-item.me .message-content {
    background: #95EC69;
    color: #333333;
    border: 1px solid #82D660;
    border-top-right-radius: 0;
}

.message-item.me .message-content::before {
    content: "";
    position: absolute;
    right: -8px;
    top: 12px;
    width: 0;
    height: 0;
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
    border-left: 8px solid #95EC69;
}

.empty-chat {
    text-align: center;
    padding: 60px;
    color: #999;
}

.chat-input-area {
    background: #F7F7F7;
    border-top: 1px solid #ffffff;
    display: flex;
    gap: 10px;
    padding: 10px 15px;
}

.chat-input-area textarea {
    flex: 1;
    border-radius: 6px;
    border: 1px solid #ffffff;
    background: #FFFFFF;
    padding: 10px 12px;
    font-size: 15px;
    resize: none;
    outline: none;
}

.chat-input-area button {
    background: #07C160;
    border-radius: 6px;
    padding: 0 20px;
    font-size: 15px;
    border: none;
    color: white;
    cursor: pointer;
}

.chat-input-area button:hover {
    background: #06AD56;
}

.community-sidebar {
    width: 320px;
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(255, 255, 255, 0.1);
    height: calc(100vh - 120px);
    display: flex;
    flex-direction: column;
}

.community-header {
    background: linear-gradient(135deg, #ffbe19 10%);
    color: white;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.community-header h3 {
    font-size: 16px;
    font-weight: 500;
}

.post-btn {
    background: rgba(255,255,255,0.2);
    border: none;
    color: white;
    padding: 6px 12px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.3s;
}

.post-btn:hover {
    background: rgba(255,255,255,0.3);
}

.posts-list {
    flex: 1;
    overflow-y: auto;
    padding: 15px;
}

.post-card {
    background: #f8f9fa;
    border-radius: 16px;
    padding: 15px;
    margin-bottom: 15px;
    transition: all 0.3s;
    border: 1px solid #f0f0f0;
    cursor: pointer;
}

.post-card:hover {
    background: white;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transform: translateY(-2px);
}

.post-user {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.avatar-img {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    object-fit: cover;
}

.post-tag {
    background: #ff9800;
    color: white;
    padding: 2px 10px;
    border-radius: 15px;
    font-size: 10px;
    margin-left: auto;
}

.post-title {
    font-weight: bold;
    font-size: 16px;
    margin-bottom: 10px;
    color: #333;
}

.post-content {
    font-size: 13px;
    color: #666;
    line-height: 1.5;
    margin-bottom: 10px;
}

.post-actions {
    display: flex;
    gap: 20px;
    font-size: 12px;
    color: #999;
    margin-top: 12px;
}

.post-actions button {
    background: none;
    border: none;
    color: #999;
    cursor: pointer;
    transition: color 0.3s;
}

.post-actions button:hover {
    color: #ff9800;
}

.comment-section {
    border-top: 1px solid #eee;
    margin-top: 15px;
    padding-top: 15px;
}

.comment-list {
    max-height: 200px;
    overflow-y: auto;
    margin-bottom: 10px;
}

.comment-item {
    font-size: 13px;
    padding: 6px 0;
    color: #333;
    border-bottom: 1px solid #f5f5f5;
}

.comment-input-bar {
    display: flex;
    gap: 8px;
    align-items: center;
}

.comment-input-bar input {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 20px;
    font-size: 12px;
    outline: none;
}

.comment-input-bar button {
    background: #ff9800;
    color: white;
    border: none;
    padding: 8px 14px;
    border-radius: 20px;
    font-size: 12px;
    cursor: pointer;
}

.comment-input-bar button:hover {
    background: #f57c00;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    background-color: white;
    margin: 8% auto;
    padding: 25px;
    border-radius: 24px;
    width: 480px;
    max-width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    animation: modalFadeIn 0.3s;
}

@keyframes modalFadeIn {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}

.close {
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    color: #999;
}

.close:hover {
    color: #333;
}

.search-tabs {
    display: flex;
    gap: 10px;
    margin: 20px 0;
    border-bottom: 2px solid #eee;
}

.tab-btn {
    padding: 8px 16px;
    background: none;
    border: none;
    cursor: pointer;
    color: #666;
    font-size: 14px;
    transition: all 0.3s;
}

.tab-btn.active {
    color: #ff9800;
    border-bottom: 2px solid #ff9800;
    margin-bottom: -2px;
}

.tab-pane { display: none; }
.tab-pane.active { display: block; }

.search-input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #ddd;
    border-radius: 25px;
    margin-bottom: 15px;
    outline: none;
}

.search-input:focus {
    border-color: #ff9800;
}

.search-btn {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, #ffbe19 0%);
    color: white;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 500;
}

.search-btn:hover {
    transform: scale(1.02);
}

.user-result-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-bottom: 1px solid #eee;
}

.user-result-avatar {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: linear-gradient(135deg, #ffbe19 0%, #764ba200 100%);
    color: white;
    overflow: hidden;
}

.user-result-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.add-friend-result-btn {
    background: #ff9800;
    border: none;
    color: white;
    padding: 6px 14px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 12px;
}

.add-friend-result-btn:hover {
    background: #f57c00;
}

.post-title-input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 12px;
    margin-bottom: 15px;
    outline: none;
}

.post-category {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 12px;
    margin: 15px 0;
}

.submit-post-btn {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, #ffbe19 0%, #764ba200 100%);
    color: white;
    border: none;
    border-radius: 25px;
    cursor: pointer;
}

footer {
    position: fixed;
    bottom: 15px;
    right: 20px;
}

footer a {
    color: rgba(255,255,255,0.7);
    font-size: 12px;
    background: rgba(0,0,0,0.5);
    padding: 6px 12px;
    border-radius: 20px;
    text-decoration: none;
}

.notification-toast {
    position: fixed;
    top: 80px;
    right: 20px;
    background: #10b981;
    color: white;
    padding: 12px 20px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    z-index: 10000;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.request-badge {
    position: absolute;
    top: -8px;
    right: -8px;
    background: #ffbe19;
    color: white;
    font-size: 10px;
    padding: 2px 5px;
    border-radius: 10px;
    min-width: 18px;
    text-align: center;
    animation: pulse 0.5s ease;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}
/* 三个点按钮：移到用户名和标签中间 */
.more-dots {
  position: relative;
  display: inline-block;
  margin: 0 10px;
  cursor: pointer;
  vertical-align: middle;
}
.more-dots span {
  display: block;
  width: 4px;
  height: 4px;
  background: #999;
  border-radius: 50%;
  margin: 2px 0;
}
.dots-menu {
  position: absolute;
  top: 20px;
  right: 0;
  background: #fff;
  border: 1px solid #eee;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
  width: 120px;
  display: none;
  z-index: 9999;
}
.dots-item {
  padding: 12px 16px;
  font-size: 16px;
  cursor: pointer;
  text-align: center;
}
.dots-item.delete-item {
  color: #ffbe19;
  border-bottom: 1px solid #f0f0f0;
}
.dots-item.cancel-item {
  color: #333;
}
.dots-item:hover {
  background-color: #f5f5f5;
}

/* 移除之前的右上角定位 */
.post-card {
  position: relative;
}
.comment-item {
    position: relative;
}
.comment-menu {
    min-width: 100px;
}
.comment-menu-item:hover {
    background-color: #f5f5f5;
}