/* ============================================================
   星轨 AI 前端样式：摘要卡 / 浮动助手 / 输入区
   ============================================================ */

:root {
    --ai-surface: #ffffff;
    --ai-surface-2: #f8f9fb;
    --ai-fab-bottom: calc(var(--zb-fab-edge) + var(--zb-fab-size) + var(--zb-fab-gap));
}
:root[data-theme="dark"] {
    --ai-surface: #15181e;
    --ai-surface-2: #1a1e25;
}
body.zb-site-bg-glass { --ai-surface: rgba(255, 255, 255, .965); --ai-surface-2: rgba(255, 255, 255, .86); }
[data-theme="dark"] body.zb-site-bg-glass { --ai-surface: rgba(23, 26, 32, .955); --ai-surface-2: rgba(30, 34, 41, .90); }

/* ---------- 文章页 AI 摘要 ---------- */
/* 摘要卡与封面图、目录框共用 .article-detail 的内容列：
   左右留白跟正文完全一致，不会比正文宽出一圈；
   下边距收掉，由 .article-body 的 padding-top 统一控制间距。 */
.ai-summary {
    position: relative;
    margin: 18px var(--article-pad-x, 40px) 0;
    padding: 11px 14px;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: var(--bg-card);
    transition: border-color .18s ease, box-shadow .18s ease;
}
.ai-summary:hover {
    border-color: var(--primary-border);
}
.ai-summary-head {
    display: flex;
    align-items: center;
    gap: 10px;
}
.ai-summary-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12.5px;
    font-weight: 600;
    color: var(--primary);
    white-space: nowrap;
}
.ai-summary-badge i { font-size: 11.5px; }
.ai-summary-btn {
    margin-left: auto;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    height: 28px;
    padding: 0 12px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: var(--bg-elevated);
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 12.5px;
    cursor: pointer;
    flex: none;
    transition: all .16s ease;
}
.ai-summary-btn:hover:not(:disabled) {
    border-color: var(--primary-border);
    color: var(--primary);
    background: var(--primary-bg);
}
.ai-summary-btn:disabled { opacity: .6; cursor: default; }
.ai-summary-body {
    margin-top: 9px;
    font-size: 13.5px;
    line-height: 1.8;
    color: var(--text-secondary);
    white-space: pre-wrap;
    word-break: break-word;
}
.ai-summary-body:empty { display: none; }
.ai-summary-body.is-loading {
    display: flex;
    align-items: center;
    gap: 2px;
    min-height: 22px;
}
.ai-summary-error {
    display: flex;
    align-items: flex-start;
    gap: 7px;
    color: var(--danger);
    font-size: 13px;
    line-height: 1.7;
}
.ai-summary-error i { flex: none; margin-top: 4px; font-size: 12px; }
.ai-summary-foot {
    margin-top: 9px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 11.5px;
    color: var(--text-tertiary);
}
.ai-summary-foot:empty { display: none; }
.ai-summary-retry {
    border: none;
    background: none;
    padding: 0;
    color: var(--text-tertiary);
    font-family: inherit;
    font-size: 11.5px;
    cursor: pointer;
}
.ai-summary-retry:hover { color: var(--primary); }

.ai-caret {
    display: inline-block;
    width: 2px;
    height: 1em;
    margin-left: 2px;
    vertical-align: -2px;
    background: var(--primary);
    animation: ai-blink 1s steps(2, start) infinite;
}
@keyframes ai-blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }

.ai-loading-dots { display: inline-flex; gap: 4px; align-items: center; }
.ai-wait-hint { font-size: 12px; color: var(--text-tertiary); margin-left: 2px; }
.ai-loading-dots i {
    width: 5px; height: 5px; border-radius: 50%;
    background: var(--primary); opacity: .35;
    animation: ai-dot 1.1s infinite ease-in-out;
}
.ai-loading-dots i:nth-child(2) { animation-delay: .15s; }
.ai-loading-dots i:nth-child(3) { animation-delay: .3s; }
@keyframes ai-dot { 0%, 80%, 100% { transform: translateY(0); opacity: .3; } 40% { transform: translateY(-4px); opacity: 1; } }

/* ---------- 悬浮按钮 ---------- */
.ai-fab {
    position: fixed;
    right: var(--zb-fab-right);
    bottom: var(--ai-fab-bottom);
    z-index: 7800;
    width: var(--zb-fab-size);
    height: var(--zb-fab-size);
    padding: 0;
    border-radius: 50%;
    border: 1px solid var(--zb-fab-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 19px;
    font-family: inherit;
    cursor: pointer;
    background: var(--zb-fab-bg);
    box-shadow: var(--zb-fab-shadow);
    -webkit-backdrop-filter: blur(20px) saturate(200%);
    backdrop-filter: blur(20px) saturate(200%);
    transition: transform .18s ease, box-shadow .18s ease,
                background .18s ease, border-color .18s ease, color .18s ease;
}
.ai-fab:hover {
    transform: translateY(-2px);
    color: var(--text-on-primary);
    background: var(--primary);
    border-color: var(--primary);
    box-shadow: var(--shadow-primary);
}
.ai-fab:active { transform: scale(.96); }
.ai-fab.is-open {
    color: var(--text-on-primary);
    background: var(--primary);
    border-color: var(--primary);
}

/* ---------- 对话面板 ---------- */
.ai-panel {
    position: fixed;
    right: 22px;
    right: var(--zb-fab-right);
    bottom: calc(var(--ai-fab-bottom) + var(--zb-fab-size) + 12px);
    z-index: 7900;
    width: 384px;
    max-width: calc(100vw - 24px);
    height: min(600px, calc(100vh - var(--ai-fab-bottom) - var(--zb-fab-size) - 34px));
    display: flex;
    flex-direction: column;
    background: var(--ai-surface);
    -webkit-backdrop-filter: blur(44px) saturate(180%);
    backdrop-filter: blur(44px) saturate(180%);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    box-shadow: 0 26px 70px rgba(16, 19, 26, .20), 0 2px 8px rgba(16, 19, 26, .05);
    overflow: hidden;
    opacity: 0;
    transform: translateY(14px) scale(.985);
    pointer-events: none;
    transition: opacity .2s ease, transform .2s ease;
}
[data-theme="dark"] .ai-panel { box-shadow: 0 26px 70px rgba(0, 0, 0, .55); }
.ai-panel.is-open { opacity: 1; transform: none; pointer-events: auto; }

.ai-panel-head {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 12px 12px 14px;
    border-bottom: 1px solid var(--border-color);
    background: var(--ai-surface-2);
    flex-shrink: 0;
}
.ai-panel-avatar {
    width: 34px; height: 34px; border-radius: 12px; flex-shrink: 0;
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-size: 14px;
    background: linear-gradient(145deg, var(--primary-light), var(--primary-dark));
    box-shadow: 0 4px 12px rgba(var(--primary-rgb), .28);
}
.ai-panel-title { flex: 1; min-width: 0; }
.ai-panel-title .n { font-size: 14px; font-weight: 600; color: var(--text-primary); letter-spacing: .01em; }
.ai-panel-title .s { font-size: 11px; color: var(--text-tertiary); margin-top: 2px; }
.ai-panel-close {
    width: 30px; height: 30px; border: none; border-radius: 9px;
    background: transparent; color: var(--text-tertiary); cursor: pointer; font-size: 14px;
}
.ai-panel-close:hover { background: var(--bg-hover); color: var(--text-primary); }
.ai-panel-clear {
    width: 30px; height: 30px; border: none; border-radius: 9px;
    background: transparent; color: var(--text-tertiary); cursor: pointer; font-size: 13px;
}
.ai-panel-clear:hover { background: var(--bg-hover); color: var(--text-primary); }
.ai-panel-clear.is-armed {
    background: var(--danger-bg, rgba(239, 68, 68, .12));
    color: var(--danger);
}
/* 停止生成 */
.ai-panel-stop {
    width: 30px; height: 30px; border: none; border-radius: 9px;
    background: var(--danger-bg, rgba(239, 68, 68, .12));
    color: var(--danger); cursor: pointer; font-size: 13px;
    display: inline-flex; align-items: center; justify-content: center;
    transition: background .16s ease, color .16s ease;
}
.ai-panel-stop:hover { background: var(--danger); color: #fff; }
.ai-panel-stop[hidden] { display: none; }

/* 回到最新 */
.ai-panel-latest {
    position: absolute;
    left: 50%;
    bottom: 94px;
    transform: translateX(-50%);
    z-index: 3;
    width: 32px; height: 32px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--bg-elevated);
    color: var(--text-secondary);
    box-shadow: 0 6px 18px rgba(16, 19, 26, .16);
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    font-size: 12px;
    transition: color .16s ease, border-color .16s ease;
}
.ai-panel-latest:hover { color: var(--primary); border-color: var(--primary-border); }
.ai-panel-latest[hidden] { display: none; }

.ai-panel-body {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    padding: 14px 14px 6px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
}

.ai-msg { display: flex; gap: 8px; max-width: 100%; }
.ai-msg-user { flex-direction: row-reverse; }
.ai-msg-avatar {
    width: 26px; height: 26px; border-radius: 50%; flex-shrink: 0;
    display: flex; align-items: center; justify-content: center;
    font-size: 11px; color: #fff;
    background: linear-gradient(145deg, var(--primary-light), var(--primary-dark));
}
.ai-msg-user .ai-msg-avatar { background: var(--bg-subtle); color: var(--text-secondary); }
.ai-msg-main {
    min-width: 0;
    max-width: calc(100% - 38px);
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.ai-bubble {
    max-width: 100%;
    padding: 9px 12px;
    border-radius: 12px 12px 12px 4px;
    background: var(--bg-subtle);
    color: var(--text-primary);
    font-size: 13.5px;
    line-height: 1.75;
    white-space: pre-wrap;
    word-break: break-word;
}
.ai-msg-user .ai-bubble {
    border-radius: 12px 12px 4px 12px;
    background: var(--primary);
    color: #fff;
}

/* 回答下方的操作条 */
.ai-msg-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.ai-act {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 9px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-elevated);
    color: var(--text-tertiary);
    font-size: 11.5px;
    font-family: inherit;
    cursor: pointer;
    transition: color .15s ease, border-color .15s ease, background .15s ease;
}
.ai-act:hover { color: var(--primary); border-color: var(--primary-border); }
.ai-act i { font-size: 10.5px; }
.ai-msg-stopped .ai-bubble {
    background: var(--bg-subtle);
    color: var(--text-tertiary);
    font-size: 12.5px;
}
.ai-bubble .ai-src {
    margin-top: 9px;
    padding-top: 8px;
    border-top: 1px dashed var(--border-color);
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.ai-bubble .ai-src a {
    font-size: 11.5px;
    color: var(--primary);
    background: var(--primary-bg);
    border-radius: 6px;
    padding: 3px 7px;
    text-decoration: none;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.ai-bubble .ai-src a:hover { text-decoration: underline; }

.ai-msg-error .ai-bubble {
    background: var(--danger-bg);
    color: var(--danger);
}

.ai-suggest { display: flex; flex-wrap: wrap; gap: 7px; padding: 0 0 8px; }
.ai-suggest button {
    border: 1px solid var(--border-color);
    background: var(--bg-elevated);
    color: var(--text-secondary);
    border-radius: 999px;
    padding: 6px 11px;
    font-size: 12px;
    cursor: pointer;
    transition: all .15s ease;
}
.ai-suggest button:hover { border-color: var(--primary-border); color: var(--primary); }

.ai-panel-foot {
    flex-shrink: 0;
    padding: 10px 12px 12px;
    border-top: 1px solid var(--border-color);
    background: var(--bg-elevated);
}
.ai-compose {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    padding: 6px 6px 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: 13px;
    background: var(--bg-input);
    transition: border-color .16s ease, box-shadow .16s ease;
}
.ai-compose:focus-within { border-color: var(--primary-border); box-shadow: 0 0 0 3px var(--primary-bg); }
.ai-compose textarea {
    flex: 1;
    min-height: 26px;
    max-height: 96px;
    padding: 6px 0;
    border: none;
    outline: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 16px; /* iOS 不缩放 */
    line-height: 1.5;
    resize: none;
    font-family: inherit;
}
.ai-compose textarea::placeholder { color: var(--text-tertiary); }
.ai-send {
    flex-shrink: 0;
    width: 32px; height: 32px;
    border: none; border-radius: 10px;
    background: var(--primary); color: #fff;
    cursor: pointer; font-size: 13px;
    display: flex; align-items: center; justify-content: center;
    transition: opacity .16s ease;
}
.ai-send:disabled { opacity: .4; cursor: default; }
.ai-panel-tip {
    margin-top: 7px;
    font-size: 10.5px;
    color: var(--text-tertiary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}
.ai-tip-hint { opacity: .85; }
.ai-count { font-variant-numeric: tabular-nums; }
.ai-count.is-max { color: var(--danger); }

/* ---------- 说说润色按钮 ---------- */
.mood-ai-polish {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    height: 30px;
    padding: 0 10px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: var(--bg-elevated);
    color: var(--text-secondary);
    font-size: 12px;
    cursor: pointer;
}
.mood-ai-polish:hover { border-color: var(--primary-border); color: var(--primary); }
.mood-ai-polish:disabled { opacity: .5; cursor: default; }

body.zb-has-player { --ai-fab-bottom: calc(80px + var(--zb-fab-size) + var(--zb-fab-gap)); }
body.immersive-active { --ai-fab-bottom: calc(24px + var(--zb-fab-size) + var(--zb-fab-gap)); }
@media (max-width: 768px) {
    body.zb-has-player { --ai-fab-bottom: calc(var(--zb-mobile-nav-height, 62px) + var(--zb-player-gap, 0px) + 76px + var(--zb-fab-size) + var(--zb-fab-gap)); }
}

/* ---------- 移动端 ---------- */
@media (max-width: 640px) {
    .ai-summary {
        padding: 10px 12px;
        border-radius: 11px;
        margin: 14px var(--article-pad-x, 16px) 0;
    }
    .ai-summary-badge { font-size: 12px; }
    .ai-summary-btn { height: 27px; padding: 0 10px; font-size: 12px; }
    .ai-summary-body { font-size: 13px; line-height: 1.75; margin-top: 8px; }
    .ai-panel {
        right: 0; left: 0; bottom: 0;
        width: 100%;
        max-width: none;
        height: 86vh;
        height: 86dvh;
        border-radius: 20px 20px 0 0;
        border-bottom: none;
    }
    .ai-panel::before {
        content: '';
        position: absolute;
        top: 7px;
        left: 50%;
        width: 38px;
        height: 4px;
        margin-left: -19px;
        border-radius: 999px;
        background: var(--border-color);
        opacity: .85;
        z-index: 4;
    }
    .ai-panel-head { padding-top: 16px; }
    .ai-panel-latest { bottom: 104px; }
    .ai-panel-body { padding: 12px 12px 4px; }
    .ai-panel-foot { padding-bottom: max(12px, env(safe-area-inset-bottom)); }
    .ai-tip-hint { display: none; }
    .ai-panel-tip { justify-content: flex-end; }
}