/* ===== Twitter 全屏适配修复 ===== */
:root {
    --tw-bg: #ffffff;
    --tw-bg-secondary: #f7f9f9;
    --tw-bg-hover: #f5f5f5;
    --tw-text: #0f1419;
    --tw-text-secondary: #536471;
    --tw-border: #eff3f4;
    --tw-accent: #1d9bf0;
    --tw-accent-hover: #1a8cd8;
    --tw-like: #f91880;
    --tw-retweet: #00ba7c;
    --tw-card-bg: #ffffff;
    --tw-modal-bg: rgba(0,0,0,0.4);
    --tw-shadow: 0 1px 3px rgba(0,0,0,0.08);
    --tw-shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --tw-nav-bg: rgba(255,255,255,0.85);
    --tw-input-bg: #eff3f4;
}

/* ===== 暗色模式 ===== */
.dark-mode {
    --tw-bg: #000000;
    --tw-bg-secondary: #16181c;
    --tw-bg-hover: #1d1f23;
    --tw-text: #e7e9ea;
    --tw-text-secondary: #71767b;
    --tw-border: #2f3336;
    --tw-card-bg: #16181c;
    --tw-modal-bg: rgba(91,112,131,0.4);
    --tw-shadow: 0 0 0 rgba(0,0,0,0);
    --tw-shadow-lg: 0 0 15px rgba(255,255,255,0.05);
    --tw-nav-bg: rgba(0,0,0,0.85);
    --tw-input-bg: #202327;
}

#twitterApp {
    position: fixed !important;
    top: 0; left: 0; right: 0; bottom: 0;
    width: 100%; height: 100%;
    z-index: 100;
    display: flex;
    flex-direction: column;
    background: var(--tw-bg);
    color: var(--tw-text);
    transition: background 0.3s, color 0.3s;
}

.twitter-app {
    background-color: var(--tw-bg);
    color: var(--tw-text);
    display: flex;
    flex-direction: column;
    flex: 1;
    height: 100%;
    overflow: hidden;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

/* ===== 骨架屏 ===== */
@keyframes skeletonShimmer {
    0% { background-position: -200px 0; }
    100% { background-position: calc(200px + 100%) 0; }
}

.skeleton {
    background: linear-gradient(90deg, var(--tw-bg-secondary) 25%, var(--tw-bg-hover) 37%, var(--tw-bg-secondary) 63%);
    background-size: 400px 100%;
    animation: skeletonShimmer 1.4s ease infinite;
    border-radius: 4px;
}

.skeleton-tweet {
    display: flex;
    padding: 16px;
    border-bottom: 1px solid var(--tw-border);
}

.skeleton-avatar {
    width: 48px; height: 48px;
    border-radius: 50%;
    margin-right: 12px;
    flex-shrink: 0;
}

.skeleton-content { flex: 1; }

.skeleton-line {
    height: 12px;
    margin-bottom: 10px;
    border-radius: 4px;
}

.skeleton-line.short { width: 40%; }
.skeleton-line.medium { width: 70%; }
.skeleton-line.long { width: 95%; }
.skeleton-line.img { height: 180px; border-radius: 16px; margin-top: 10px; }

/* ===== Header ===== */
.t-header {
    height: auto;
    min-height: 53px;
    display: flex;
    align-items: center;
    padding: 0 16px;
    padding-top: env(safe-area-inset-top, 0px);
    border-bottom: 1px solid var(--tw-border);
    flex-shrink: 0;
    background: var(--tw-nav-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 100;
    position: sticky;
    top: 0;
}

.t-avatar-small {
    width: 32px; height: 32px;
    border-radius: 50%;
    background-color: var(--tw-bg-secondary);
    background-size: cover;
    background-position: center;
    cursor: pointer;
    transition: opacity 0.2s;
}
.t-avatar-small:active { opacity: 0.7; }

.t-logo {
    font-size: 24px;
    font-weight: 800;
    color: var(--tw-text);
    margin-left: 20px;
    flex: 1;
    text-align: center;
}

.t-header-icon {
    font-size: 18px;
    color: var(--tw-text);
    cursor: pointer;
    width: 36px; height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.2s;
    position: relative;
}
.t-header-icon:active { background: var(--tw-bg-hover); }

/* ===== 导航栏角标 ===== */
.nav-badge {
    position: absolute;
    top: -2px; right: -2px;
    min-width: 18px; height: 18px;
    background: var(--tw-accent);
    color: white;
    border-radius: 9px;
    font-size: 11px;
    font-weight: 700;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 0 5px;
    border: 2px solid var(--tw-bg);
    line-height: 1;
}
.nav-badge.show { display: flex; }

/* ===== Content ===== */
.t-content {
    flex: 1;
    overflow-y: auto;
    position: relative;
    -webkit-overflow-scrolling: touch;
    scroll-behavior: smooth;
}

.t-tab-page {
    display: none;
    min-height: 100%;
    padding-bottom: calc(70px + env(safe-area-inset-bottom, 0px));
}
.t-tab-page.active { display: block; }

/* ===== 下拉刷新 ===== */
.pull-to-refresh {
    text-align: center;
    padding: 0;
    height: 0;
    overflow: hidden;
    transition: height 0.3s, padding 0.3s;
    color: var(--tw-accent);
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}
.pull-to-refresh.pulling {
    height: 50px;
    padding: 10px 0;
}
.pull-to-refresh.refreshing .ptr-spinner {
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== Tweet Item ===== */
.tweet-item {
    display: flex;
    padding: 12px 16px;
    border-bottom: 1px solid var(--tw-border);
    cursor: pointer;
    transition: background 0.15s;
    position: relative;
    background: var(--tw-bg);
}
.tweet-item:hover { background: var(--tw-bg-hover); }
.tweet-item:active { background: var(--tw-bg-secondary); }

.tweet-avatar {
    width: 40px; height: 40px;
    border-radius: 50%;
    background-color: var(--tw-bg-secondary);
    margin-right: 12px;
    flex-shrink: 0;
    background-size: cover;
    background-position: center;
    transition: opacity 0.2s;
}
.tweet-avatar:active { opacity: 0.8; }

.tweet-content {
    flex: 1;
    min-width: 0;
}

.tweet-header {
    display: flex;
    align-items: center;
    margin-bottom: 2px;
    white-space: nowrap;
    overflow: hidden;
    line-height: 20px;
}

.tweet-name {
    font-weight: 700;
    margin-right: 4px;
    color: var(--tw-text);
    font-size: 15px;
    overflow: hidden;
    text-overflow: ellipsis;
}

.tweet-handle, .tweet-time {
    color: var(--tw-text-secondary);
    font-size: 15px;
    flex-shrink: 0;
}

.tweet-time::before {
    content: "·";
    margin: 0 4px;
}

.tweet-text {
    font-size: 15px;
    line-height: 1.45;
    color: var(--tw-text);
    margin-bottom: 10px;
    white-space: pre-wrap;
    word-wrap: break-word;
}

/* ===== 回复线程连接线 ===== */
.thread-line {
    position: absolute;
    left: 36px;
    top: 64px;
    bottom: 0;
    width: 2px;
    background: var(--tw-border);
}

.comment-thread-line {
    position: relative;
}
.comment-thread-line::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: -12px;
    width: 2px;
    background: var(--tw-border);
}
.comment-thread-line:last-child::before {
    display: none;
}

/* ===== Image Grid ===== */
.tweet-media {
    margin-top: 10px;
    border-radius: 16px;
    overflow: hidden;
    display: grid;
    gap: 2px;
}
.tweet-media.grid-1 { grid-template-columns: 1fr; }
.tweet-media.grid-2 { grid-template-columns: 1fr 1fr; max-height: 290px; }
.tweet-media.grid-3 { grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; max-height: 290px; }
.tweet-media.grid-3 img:first-child { grid-row: span 2; }
.tweet-media.grid-4 { grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; max-height: 290px; }
.tweet-media img {
    width: 100%; height: 100%;
    object-fit: cover;
    display: block;
    cursor: pointer;
    transition: filter 0.2s;
}
.tweet-media img:hover { filter: brightness(0.92); }

/* ===== 图片灯箱 ===== */
.tw-lightbox {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.9);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.25s;
    cursor: zoom-out;
}
.tw-lightbox.active { opacity: 1; }
.tw-lightbox img {
    max-width: 95%; max-height: auto;
    object-fit: contain;
    border-radius: 8px;
    transform: scale(0.9);
    transition: transform 0.3s;
}
.tw-lightbox.active img { transform: scale(1); }
.tw-lightbox-close {
    position: absolute; top: 20px; right: 20px;
    width: 36px; height: 36px;
    border-radius: 50%;
    background: rgba(255,255,255,0.15);
    color: white; font-size: 18px;
    display: flex; align-items: center; justify-content: center;
    cursor: pointer;
}
.tw-lightbox-nav {
    position: absolute; top: 50%;
    transform: translateY(-50%);
    width: 44px; height: 44px;
    border-radius: 50%;
    background: rgba(255,255,255,0.15);
    color: white; font-size: 20px;
    display: flex; align-items: center; justify-content: center;
    cursor: pointer;
    transition: background 0.2s;
}
.tw-lightbox-nav:hover { background: rgba(255,255,255,0.3); }
.tw-lightbox-nav.prev { left: 15px; }
.tw-lightbox-nav.next { right: 15px; }
.tw-lightbox-counter {
    position: absolute; bottom: 30px;
    color: white; font-size: 14px;
    background: rgba(0,0,0,0.5);
    padding: 4px 12px; border-radius: 20px;
}

/* ===== Quote Tweet ===== */
.tweet-quote {
    margin-top: 10px;
    border: 1px solid var(--tw-border);
    border-radius: 16px;
    padding: 12px;
    cursor: pointer;
    transition: background 0.2s;
}
.tweet-quote:hover { background: var(--tw-bg-hover); }
.quote-header { display: flex; align-items: center; margin-bottom: 4px; }
.quote-avatar { width: 20px; height: 20px; border-radius: 50%; margin-right: 8px; background-size: cover; }
.quote-name { font-weight: 700; font-size: 13px; margin-right: 4px; }
.quote-handle { color: var(--tw-text-secondary); font-size: 13px; }

/* ===== Actions ===== */
.tweet-actions {
    display: flex;
    justify-content: space-between;
    max-width: 425px;
    margin-top: 4px;
}

.t-action-btn {
    display: flex;
    align-items: center;
    color: var(--tw-text-secondary);
    font-size: 13px;
    cursor: pointer;
    transition: color 0.15s;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

.t-action-btn i {
    font-size: 17px;
    padding: 8px;
    border-radius: 50%;
    transition: background 0.15s, color 0.15s;
    margin-right: 2px;
}

.t-action-btn:hover i { background: rgba(29,155,240,0.1); color: var(--tw-accent); }
.t-action-btn:hover span { color: var(--tw-accent); }

.t-action-btn.like-btn:hover i { background: rgba(249,24,128,0.1); color: var(--tw-like); }
.t-action-btn.like-btn:hover span { color: var(--tw-like); }
.t-action-btn.liked { color: var(--tw-like); }
.t-action-btn.liked i { color: var(--tw-like); }

.t-action-btn.retweet-btn:hover i { background: rgba(0,186,124,0.1); color: var(--tw-retweet); }
.t-action-btn.retweet-btn:hover span { color: var(--tw-retweet); }
.t-action-btn.retweeted { color: var(--tw-retweet); }
.t-action-btn.retweeted i { color: var(--tw-retweet); }

/* ===== 点赞动画 ===== */
@keyframes likePopIn {
    0% { transform: scale(0); }
    50% { transform: scale(1.3); }
    100% { transform: scale(1); }
}
.like-animate i {
    animation: likePopIn 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* ===== 双击爱心动画 ===== */
@keyframes doubleTapHeart {
    0% { transform: scale(0) rotate(-10deg); opacity: 1; }
    30% { transform: scale(1.2) rotate(5deg); opacity: 1; }
    60% { transform: scale(1) rotate(0); opacity: 1; }
    100% { transform: scale(1.3); opacity: 0; }
}
.double-tap-heart {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%) scale(0);
    font-size: 80px;
    color: var(--tw-like);
    pointer-events: none;
    z-index: 10;
    animation: doubleTapHeart 0.9s ease forwards;
    filter: drop-shadow(0 4px 12px rgba(249,24,128,0.4));
}

/* ===== 点赞粒子 ===== */
@keyframes particleFly {
    0% { transform: translate(0, 0) scale(1); opacity: 1; }
    100% { opacity: 0; }
}
.like-particle {
    position: absolute;
    width: 6px; height: 6px;
    border-radius: 50%;
    pointer-events: none;
    animation: particleFly 0.7s ease-out forwards;
}

/* ===== FAB ===== */
.t-fab {
    position: fixed;
    bottom: calc(90px + env(safe-area-inset-bottom, 0px));
    right: 20px;
    width: 56px; height: 56px;
    border-radius: 50%;
    background: var(--tw-accent);
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 22px;
    box-shadow: 0 4px 12px rgba(29,155,240,0.4);
    cursor: pointer;
    z-index: 20;
    transition: transform 0.2s, box-shadow 0.2s;
}
.t-fab:hover { transform: scale(1.05); box-shadow: 0 6px 20px rgba(29,155,240,0.5); }
.t-fab:active { transform: scale(0.95); }

/* ===== Bottom Nav ===== */
.t-nav-bar {
    min-height: 50px;
    flex-shrink: 0;
    display: flex !important;
    justify-content: space-around;
    align-items: center;
    background: var(--tw-nav-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding-top: 8px;
    padding-bottom: calc(8px + env(safe-area-inset-bottom, 0px));
    position: fixed;
    bottom: 0; left: 0; right: 0;
    z-index: 400 !important;
    border-top: 1px solid var(--tw-border);
}

.t-nav-item {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 44px;
    cursor: pointer;
    color: var(--tw-text-secondary);
    transition: color 0.15s;
    position: relative;
    -webkit-tap-highlight-color: transparent;
}
.t-nav-item i { font-size: 22px; }
.t-nav-item.active { color: var(--tw-text); }

/* ===== Sidebar Drawer ===== */
.t-drawer-overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: var(--tw-modal-bg);
    z-index: 200;
    display: none;
    opacity: 0;
    transition: opacity 0.3s;
}
.t-drawer-overlay.open { display: block; opacity: 1; }

.t-drawer {
    position: fixed;
    top: 0; left: -280px;
    width: 280px; height: 100%;
    background: var(--tw-bg);
    z-index: 201;
    transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    padding: 20px;
    padding-top: calc(20px + env(safe-area-inset-top, 0px));
    padding-bottom: calc(20px + env(safe-area-inset-bottom, 0px));
    box-shadow: 5px 0 20px rgba(0,0,0,0.1);
}
.t-drawer.open { left: 0; }

.t-drawer-header { margin-bottom: 20px; }
.t-drawer-avatar {
    width: 40px; height: 40px;
    border-radius: 50%;
    background-color: var(--tw-border);
    margin-bottom: 12px;
    background-size: cover;
}
.t-drawer-name { font-weight: 800; font-size: 17px; color: var(--tw-text); }
.t-drawer-handle { color: var(--tw-text-secondary); font-size: 15px; }
.t-drawer-stats { display: flex; gap: 20px; margin-top: 12px; font-size: 14px; }
.t-drawer-stats span b { color: var(--tw-text); }
.t-drawer-stats span { color: var(--tw-text-secondary); }

.t-drawer-menu { flex: 1; display: flex; flex-direction: column; gap: 8px; margin-top: 16px; }
.t-drawer-item {
    display: flex;
    align-items: center;
    gap: 20px;
    font-size: 20px;
    font-weight: 700;
    color: var(--tw-text);
    cursor: pointer;
    padding: 12px 8px;
    border-radius: 25px;
    transition: background 0.2s;
}
.t-drawer-item:active { background: var(--tw-bg-hover); }
.t-drawer-item i { width: 26px; text-align: center; }

.t-drawer-footer {
    border-top: 1px solid var(--tw-border);
    padding-top: 16px;
    display: flex;
    justify-content: space-between;
    color: var(--tw-text-secondary);
}

/* ===== DM ===== */
.t-dm-window {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: var(--tw-bg);
    z-index: 530;
    display: none;
    flex-direction: column;
}

.t-dm-header {
    height: 53px;
    display: flex;
    align-items: center;
    padding: 0 10px;
    padding-top: env(safe-area-inset-top, 0px);
    border-bottom: 1px solid var(--tw-border);
    background: var(--tw-bg);
}
.t-dm-back { padding: 10px; cursor: pointer; color: var(--tw-text); }
.t-dm-header-info { flex: 1; display: flex; flex-direction: column; align-items: center; }
.t-dm-header-name { font-weight: 700; font-size: 16px; color: var(--tw-text); }
.t-dm-header-handle { color: var(--tw-text-secondary); font-size: 13px; }

.t-dm-messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: var(--tw-bg);
}

.t-msg-bubble {
    max-width: 75%;
    padding: 12px 16px;
    font-size: 15px;
    line-height: 20px;
    word-wrap: break-word;
}
.t-msg-bubble.received {
    background: var(--tw-input-bg);
    color: var(--tw-text);
    align-self: flex-start;
    border-radius: 22px 22px 22px 4px;
}
.t-msg-bubble.sent {
    background: var(--tw-accent);
    color: #fff;
    align-self: flex-end;
    border-radius: 22px 22px 4px 22px;
}

.t-dm-input {
    padding: 12px;
    padding-bottom: calc(12px + env(safe-area-inset-bottom, 0px));
    border-top: 1px solid var(--tw-border);
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
    background: var(--tw-bg);
}
.t-dm-input input {
    flex: 1;
    background: var(--tw-input-bg);
    border: none;
    border-radius: 22px;
    padding: 12px 16px;
    font-size: 15px;
    outline: none;
    color: var(--tw-text);
}
.t-dm-send { color: var(--tw-accent); cursor: pointer; font-weight: bold; padding: 8px; }

/* ===== Search ===== */
.t-search-header {
    padding: 10px 16px;
    position: sticky;
    top: 0;
    background: var(--tw-nav-bg);
    backdrop-filter: blur(12px);
    z-index: 10;
}

.t-search-input {
    width: 100%;
    background: var(--tw-input-bg);
    border: 2px solid transparent;
    border-radius: 22px;
    padding: 10px 16px;
    font-size: 15px;
    outline: none;
    color: var(--tw-text);
    transition: border-color 0.2s, background 0.2s;
}
.t-search-input:focus {
    border-color: var(--tw-accent);
    background: var(--tw-bg);
}

/* ===== 发布字数统计环 ===== */
.char-count-ring {
    width: 30px; height: 30px;
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.char-count-ring svg {
    transform: rotate(-90deg);
    width: 30px; height: 30px;
}
.char-count-ring circle {
    fill: none;
    stroke-width: 2.5;
    r: 12;
    cx: 15;
    cy: 15;
}
.char-count-ring .bg { stroke: var(--tw-border); }
.char-count-ring .fg {
    stroke: var(--tw-accent);
    stroke-dasharray: 75.4;
    stroke-dashoffset: 75.4;
    stroke-linecap: round;
    transition: stroke-dashoffset 0.15s, stroke 0.15s;
}
.char-count-ring .fg.warning { stroke: #ffd400; }
.char-count-ring .fg.danger { stroke: #f4212e; }
.char-count-ring .count-text {
    position: absolute;
    font-size: 10px;
    font-weight: 700;
    color: var(--tw-text-secondary);
}

/* ===== Emoji Picker ===== */
.tw-emoji-picker {
    position: absolute;
    bottom: 60px; left: 10px;
    width: 320px; max-height: 300px;
    background: var(--tw-bg);
    border: 1px solid var(--tw-border);
    border-radius: 16px;
    box-shadow: var(--tw-shadow-lg);
    z-index: 100;
    overflow: hidden;
    display: none;
}
.tw-emoji-picker.show { display: block; }
.tw-emoji-categories {
    display: flex;
    border-bottom: 1px solid var(--tw-border);
    padding: 8px;
    gap: 4px;
    overflow-x: auto;
}
.tw-emoji-cat-btn {
    padding: 6px 10px;
    border: none;
    background: none;
    font-size: 18px;
    cursor: pointer;
    border-radius: 8px;
    transition: background 0.15s;
    flex-shrink: 0;
}
.tw-emoji-cat-btn:hover { background: var(--tw-bg-hover); }
.tw-emoji-cat-btn.active { background: var(--tw-accent); filter: none; }
.tw-emoji-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 2px;
    padding: 8px;
    max-height: 240px;
    overflow-y: auto;
}
.tw-emoji-item {
    width: 36px; height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    cursor: pointer;
    border-radius: 8px;
    transition: background 0.1s, transform 0.1s;
}
.tw-emoji-item:hover { background: var(--tw-bg-hover); transform: scale(1.2); }

/* ===== 页面切换动画 ===== */
.sub-page {
    position: fixed !important;
    top: 0 !important; left: 0 !important;
    right: 0 !important; bottom: 0 !important;
    width: 100% !important; height: 100% !important;
    z-index: 500 !important;
    background: var(--tw-bg) !important;
    display: none;
    flex-direction: column;
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.sub-page[style*="display: flex"],
.sub-page[style*="display:flex"] {
    display: flex !important;
    transform: translateX(0);
}

.sub-page .sub-header {
    position: relative !important;
    z-index: 10 !important;
    display: flex !important;
    align-items: center !important;
    padding: 10px 16px !important;
    padding-top: calc(10px + env(safe-area-inset-top, 0px)) !important;
    min-height: 53px !important;
    background: var(--tw-bg) !important;
    border-bottom: 1px solid var(--tw-border) !important;
    flex-shrink: 0 !important;
    gap: 16px;
}
.sub-title {
    font-weight: 800;
    font-size: 20px;
    flex: 1;
    color: var(--tw-text);
}

#tPostModal { z-index: 600 !important; }
#tEditProfileModal { z-index: 610 !important; }
#tTweetDetail { z-index: 550 !important; }
#tCommunityDetail { z-index: 560 !important; }
#tSettingsPage { z-index: 520 !important; }

/* ===== 按钮统一 ===== */
.back-btn {
    background: none !important;
    border: none !important;
    font-size: 18px !important;
    color: var(--tw-text) !important;
    cursor: pointer !important;
    padding: 8px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    width: 36px !important; height: 36px !important;
    border-radius: 50% !important;
    transition: background 0.2s !important;
    flex-shrink: 0 !important;
}
.back-btn:active { background: var(--tw-bg-hover) !important; }

.send-btn, .action-btn {
    background: var(--tw-accent);
    color: white;
    border: none;
    border-radius: 20px;
    padding: 8px 20px;
    font-weight: 700;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.2s, opacity 0.2s;
}
.send-btn:hover, .action-btn:hover { background: var(--tw-accent-hover); }
.send-btn:active, .action-btn:active { opacity: 0.8; }

.action-btn.secondary {
    background: var(--tw-bg);
    color: var(--tw-text);
    border: 1px solid var(--tw-border);
}
.action-btn.secondary:hover { background: var(--tw-bg-hover); }

/* ===== 设置页表单 ===== */
.form-content {
    padding: 16px;
    overflow-y: auto;
    flex: 1;
}

.form-group {
    margin-bottom: 20px;
}
.form-group label {
    display: block;
    font-weight: 700;
    font-size: 15px;
    margin-bottom: 8px;
    color: var(--tw-text);
}
.form-group textarea,
.form-group input[type="text"],
.form-group input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--tw-border);
    border-radius: 8px;
    font-size: 15px;
    outline: none;
    background: var(--tw-bg);
    color: var(--tw-text);
    transition: border-color 0.2s;
}
.form-group textarea:focus,
.form-group input:focus {
    border-color: var(--tw-accent);
}
.form-group textarea { min-height: 80px; resize: vertical; }

.sub-section {
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--tw-border);
}
.sub-section label {
    font-weight: 700;
    font-size: 15px;
    display: block;
    margin-bottom: 8px;
}

/* ===== 搜索历史 ===== */
.search-history-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    cursor: pointer;
    transition: background 0.15s;
}
.search-history-item:hover { background: var(--tw-bg-hover); }
.search-history-item i { color: var(--tw-text-secondary); width: 20px; text-align: center; }
.search-history-delete { margin-left: auto; color: var(--tw-accent); font-size: 13px; cursor: pointer; }

/* ===== 推荐关注卡片 ===== */
.suggested-follow-card {
    border: 1px solid var(--tw-border);
    border-radius: 16px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    min-width: 160px;
    background: var(--tw-bg);
    transition: background 0.15s;
}
.suggested-follow-card:hover { background: var(--tw-bg-hover); }

/* ===== 投票组件 ===== */
.tw-poll {
    margin-top: 10px;
    border: 1px solid var(--tw-border);
    border-radius: 12px;
    overflow: hidden;
}
.tw-poll-option {
    padding: 12px 16px;
    border-bottom: 1px solid var(--tw-border);
    cursor: pointer;
    position: relative;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.2s;
}
.tw-poll-option:last-child { border-bottom: none; }
.tw-poll-option:hover { background: var(--tw-bg-hover); }
.tw-poll-bar {
    position: absolute;
    left: 0; top: 0; bottom: 0;
    background: rgba(29,155,240,0.1);
    transition: width 0.5s ease;
    border-radius: 0 4px 4px 0;
}
.tw-poll-option.voted .tw-poll-bar { background: rgba(29,155,240,0.15); }
.tw-poll-option.winner .tw-poll-bar { background: rgba(29,155,240,0.25); }
.tw-poll-text { position: relative; z-index: 1; font-weight: 500; }
.tw-poll-pct { position: relative; z-index: 1; font-weight: 700; color: var(--tw-text-secondary); }
.tw-poll-footer {
    padding: 10px 16px;
    font-size: 13px;
    color: var(--tw-text-secondary);
    border-top: 1px solid var(--tw-border);
}

/* ===== 草稿 ===== */
.draft-item {
    padding: 16px;
    border-bottom: 1px solid var(--tw-border);
    display: flex;
    gap: 12px;
    cursor: pointer;
    transition: background 0.15s;
}
.draft-item:hover { background: var(--tw-bg-hover); }
.draft-text { flex: 1; font-size: 15px; color: var(--tw-text); }
.draft-meta { font-size: 12px; color: var(--tw-text-secondary); }
.draft-delete {
    color: #f4212e;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 8px;
    font-size: 13px;
}

/* ===== 通知分组 ===== */
.notif-group-avatars {
    display: flex;
    margin-bottom: 8px;
}
.notif-group-avatars > div {
    width: 32px; height: 32px;
    border-radius: 50%;
    background-size: cover;
    background-position: center;
    border: 2px solid var(--tw-bg);
    margin-right: -8px;
}

/* ===== iOS Safari ===== */
@supports (-webkit-touch-callout: none) {
    .t-nav-bar { padding-bottom: max(12px, env(safe-area-inset-bottom, 12px)); }
    .t-dm-input { padding-bottom: max(15px, calc(12px + env(safe-area-inset-bottom, 15px))); }
    .t-fab { bottom: calc(100px + env(safe-area-inset-bottom, 0px)); }
}

@media screen and (max-height: 700px) {
    .t-nav-bar { min-height: 48px; }
    .t-fab { bottom: calc(75px + env(safe-area-inset-bottom, 0px)); }
}

/* ===== 通用过渡 ===== */
* { -webkit-tap-highlight-color: transparent; }