/* TECHSPACE短视频 H5 - 公共样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #FF9000;
    --bg-color: #000;
    --text-color: #fff;
    --text-secondary: rgba(255,255,255,0.6);
    --border-color: #333333;
    --tab-active: #FF9000;
}

html, body {
    width: 100%;
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-color);
    color: var(--text-color);
    font-size: 14px;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

img {
    display: block;
    max-width: 100%;
}

ul, li {
    list-style: none;
}

/* 页面容器 */
.page {
    width: 100%;
    min-height: 100vh;
    padding-bottom: 60px;
    position: relative;
}

.page-full {
    padding-bottom: 0;
}

/* 顶部导航 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 15px;
    background: linear-gradient(to bottom, rgba(0,0,0,0.6), transparent);
    z-index: 100;
}

.header-title {
    font-size: 18px;
    font-weight: 600;
}

.header-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.header-btn img {
    width: 24px;
    height: 24px;
}

/* 顶部Tab切换 */
.tabs {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px 0;
}

.tab-item {
    padding: 8px 20px;
    font-size: 16px;
    color: var(--text-secondary);
    position: relative;
    transition: all 0.3s;
}

.tab-item.active {
    color: var(--text-color);
    font-weight: 600;
}

.tab-item.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
}

/* 底部导航 */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: #111;
    display: flex;
    align-items: center;
    justify-content: space-around;
    z-index: 1000;
    border-top: 1px solid var(--border-color);
    padding-bottom: env(safe-area-inset-bottom);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    height: 100%;
    color: var(--text-secondary);
    font-size: 10px;
}

.nav-item.active {
    color: var(--text-color);
}

.nav-item .icon {
    width: 24px;
    height: 24px;
    margin-bottom: 2px;
}

.nav-item .icon svg {
    width: 100%;
    height: 100%;
    fill: currentColor;
}

/* 发布按钮 */
.nav-publish { display: none !important;
    flex: none;
    width: 48px;
    height: 32px;
    background: linear-gradient(135deg, #FF9000, #FFAA33);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 10px;
    position: relative;
}

.nav-publish::before {
    content: '';
    position: absolute;
    width: 44px;
    height: 28px;
    background: #fff;
    border-radius: 6px;
}

.nav-publish svg {
    position: relative;
    z-index: 1;
    width: 20px;
    height: 20px;
}

/* 视频列表 - 双列布局 */
.video-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2px;
    padding: 2px;
}

.video-card {
    position: relative;
    aspect-ratio: 3/4;
    background: #1a1a1a;
    border-radius: 4px;
    overflow: hidden;
}

.video-card .cover {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.video-card .info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 40px 8px 8px;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
}

.video-card .author {
    display: flex;
    align-items: center;
    margin-bottom: 4px;
}

.video-card .avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    margin-right: 6px;
    border: 1px solid #fff;
}

.video-card .name {
    font-size: 12px;
    color: #fff;
}

.video-card .desc {
    font-size: 12px;
    color: rgba(255,255,255,0.8);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.video-card .stats {
    position: absolute;
    bottom: 8px;
    right: 8px;
    display: flex;
    align-items: center;
    font-size: 12px;
    color: #fff;
}

.video-card .stats svg {
    width: 14px;
    height: 14px;
    margin-right: 2px;
    fill: #fff;
}

/* 视频播放页 - 全屏滑动 */
.video-play-container {
    width: 100%;
    height: 100vh;
    overflow: hidden;
    position: relative;
}

.video-wrapper {
    width: 100%;
    height: 100%;
    position: relative;
    background: #000;
}

.video-wrapper video {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* 视频右侧操作栏 */
.video-actions {
    position: absolute;
    right: 10px;
    bottom: 150px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.action-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.action-item .icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.action-item .icon svg {
    width: 32px;
    height: 32px;
    fill: #fff;
}

.action-item .icon.liked svg {
    fill: var(--primary-color);
}

.action-item .count {
    font-size: 12px;
    color: #fff;
    margin-top: 2px;
}

.action-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 2px solid #fff;
    position: relative;
}

.action-avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
}

.action-avatar .follow {
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.action-avatar .follow svg {
    width: 12px;
    height: 12px;
    fill: #fff;
}

/* 视频底部信息 */
.video-info {
    position: absolute;
    left: 10px;
    right: 70px;
    bottom: 80px;
}

.video-author {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}

.video-desc {
    font-size: 14px;
    line-height: 1.4;
    color: rgba(255,255,255,0.9);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-music {
    display: flex;
    align-items: center;
    margin-top: 10px;
    font-size: 13px;
}

.video-music svg {
    width: 16px;
    height: 16px;
    margin-right: 6px;
    fill: #fff;
}

/* 评论弹窗 */
.comment-modal {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 65vh;
    background: #1f1f1f;
    border-radius: 12px 12px 0 0;
    z-index: 1001;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.comment-modal.show {
    transform: translateY(0);
}

.comment-header {
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid var(--border-color);
    position: relative;
}

.comment-header .title {
    font-size: 14px;
}

.comment-header .close {
    position: absolute;
    right: 15px;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.comment-list {
    height: calc(65vh - 110px);
    overflow-y: auto;
    padding: 10px 15px;
}

.comment-item {
    display: flex;
    padding: 10px 0;
}

.comment-item .avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    margin-right: 10px;
    flex-shrink: 0;
}

.comment-content {
    flex: 1;
}

.comment-name {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.comment-text {
    font-size: 14px;
    line-height: 1.4;
}

.comment-meta {
    display: flex;
    align-items: center;
    margin-top: 6px;
    font-size: 12px;
    color: var(--text-secondary);
}

.comment-meta .time {
    margin-right: 15px;
}

.comment-input {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: #2a2a2a;
    display: flex;
    align-items: center;
    padding: 0 15px;
    padding-bottom: env(safe-area-inset-bottom);
}

.comment-input input {
    flex: 1;
    height: 36px;
    background: #3a3a3a;
    border: none;
    border-radius: 18px;
    padding: 0 15px;
    color: #fff;
    font-size: 14px;
}

.comment-input input::placeholder {
    color: var(--text-secondary);
}

.comment-input .send {
    margin-left: 10px;
    padding: 8px 15px;
    background: var(--primary-color);
    border-radius: 18px;
    font-size: 14px;
    color: #fff;
}

/* 用户主页 */
.user-header {
    padding: 60px 20px 20px;
    background: linear-gradient(to bottom, #333, #000);
}

.user-info {
    display: flex;
    align-items: center;
}

.user-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    border: 3px solid #fff;
    margin-right: 15px;
}

.user-detail {
    flex: 1;
}

.user-name {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 4px;
}

.user-id {
    font-size: 13px;
    color: var(--text-secondary);
}

.user-bio {
    margin-top: 12px;
    font-size: 14px;
    color: var(--text-secondary);
}

.user-stats {
    display: flex;
    margin-top: 20px;
    gap: 30px;
}

.stat-item {
    text-align: center;
}

.stat-num {
    font-size: 18px;
    font-weight: 600;
}

.stat-label {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 2px;
}

.user-actions {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.btn {
    flex: 1;
    height: 36px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 500;
}

.btn-primary {
    background: var(--primary-color);
    color: #fff;
}

.btn-secondary {
    background: #333;
    color: #fff;
}

/* 用户作品Tab */
.user-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
}

.user-tab {
    flex: 1;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
}

.user-tab.active {
    color: #fff;
    position: relative;
}

.user-tab.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 2px;
    background: #fff;
}

.user-tab svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

/* 登录页 */
.login-page {
    padding: 80px 30px 30px;
}

.login-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 40px;
}

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.input-group input {
    width: 100%;
    height: 48px;
    background: #1f1f1f;
    border: none;
    border-radius: 8px;
    padding: 0 15px;
    color: #fff;
    font-size: 16px;
}

.input-row {
    display: flex;
    gap: 10px;
}

.input-row input {
    flex: 1;
}

.input-row .code-btn {
    width: 120px;
    height: 48px;
    background: transparent;
    border: 1px solid var(--primary-color);
    border-radius: 8px;
    color: var(--primary-color);
    font-size: 14px;
}

.login-btn {
    width: 100%;
    height: 48px;
    background: var(--primary-color);
    border: none;
    border-radius: 8px;
    color: #fff;
    font-size: 16px;
    font-weight: 500;
    margin-top: 30px;
}

.login-other {
    margin-top: 40px;
    text-align: center;
}

.login-other .title {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.login-icons {
    display: flex;
    justify-content: center;
    gap: 30px;
}

.login-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: #333;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-icon img {
    width: 28px;
    height: 28px;
}

/* 消息页 */
.msg-page {
    padding-top: 50px;
}

.msg-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 50px;
    background: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.msg-header .title {
    font-size: 18px;
    font-weight: 600;
}

.msg-types {
    display: flex;
    padding: 15px;
    gap: 20px;
    overflow-x: auto;
}

.msg-type {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 60px;
}

.msg-type .icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, #FF9000, #FFAA33);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.msg-type .icon svg {
    width: 24px;
    height: 24px;
    fill: #fff;
}

.msg-type .badge {
    position: absolute;
    top: -2px;
    right: -2px;
    min-width: 16px;
    height: 16px;
    background: #ff3b30;
    border-radius: 8px;
    font-size: 10px;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
}

.msg-type .text {
    font-size: 12px;
    margin-top: 6px;
    color: var(--text-secondary);
}

.msg-list {
    padding: 0 15px;
}

.msg-item {
    display: flex;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.msg-item .avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    margin-right: 12px;
}

.msg-item .content {
    flex: 1;
    overflow: hidden;
}

.msg-item .name {
    font-size: 15px;
    font-weight: 500;
}

.msg-item .preview {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.msg-item .time {
    font-size: 12px;
    color: var(--text-secondary);
}

/* 遮罩层 */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

.overlay.show {
    opacity: 1;
    pointer-events: auto;
}

/* 加载动画 */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.loading-spinner {
    width: 24px;
    height: 24px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 空状态 */
.empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
}

.empty svg {
    width: 80px;
    height: 80px;
    fill: #333;
    margin-bottom: 15px;
}

.empty .text {
    font-size: 14px;
    color: var(--text-secondary);
}

/* 音乐旋转动画 */
.music-disc {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: #333;
    animation: rotate 4s linear infinite;
    display: flex;
    align-items: center;
    justify-content: center;
}

.music-disc img {
    width: 28px;
    height: 28px;
    border-radius: 50%;
}

@keyframes rotate {
    to { transform: rotate(360deg); }
}

/* 下拉刷新 */
.pull-refresh {
    text-align: center;
    padding: 10px;
    color: var(--text-secondary);
    font-size: 12px;
}