/* 全站悬浮虚拟形象 */
:root {
    --z-companion: 2900;
    --companion-size: 148px;
    --companion-pose-duration: 0.32s;
}

.site-companion {
    position: fixed;
    z-index: var(--z-companion);
    width: var(--companion-size);
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
    filter: drop-shadow(0 10px 22px rgba(74, 29, 110, 0.22));
    transition: filter 0.2s ease;
}

.site-companion.is-dragging {
    filter: drop-shadow(0 16px 28px rgba(74, 29, 110, 0.32));
    cursor: grabbing;
}

.site-companion-speech {
    position: absolute;
    left: 50%;
    bottom: calc(100% - 6px);
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    width: max-content;
    max-width: min(280px, 80vw);
    pointer-events: none;
}

.site-companion.is-open .site-companion-chat {
    display: flex;
    pointer-events: auto;
}

.site-companion-bubble {
    display: none;
    width: max-content;
    max-width: min(280px, 80vw);
    opacity: 0;
    transform: translateY(4px);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.site-companion-bubble.is-visible {
    display: block;
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.site-companion-bubble-inner {
    position: relative;
    box-sizing: border-box;
    width: max-content;
    max-width: min(280px, 80vw);
    min-width: 3.5em;
    padding: 10px 12px;
    border-radius: 14px;
    background: var(--atlas-card, rgba(255, 255, 255, 0.95));
    border: 1px solid var(--atlas-line, rgba(107, 33, 165, 0.12));
    box-shadow: var(--atlas-shadow, 0 12px 32px rgba(74, 29, 110, 0.14));
    color: var(--text-primary, #1e1b2e);
    font-size: 13px;
    line-height: 1.5;
    word-break: break-word;
    overflow-wrap: anywhere;
    white-space: pre-wrap;
}

.site-companion-bubble.is-user .site-companion-bubble-inner {
    padding-top: 22px;
    padding-right: 28px;
}

.site-companion-bubble-text {
    display: block;
}

.site-companion-bubble-close {
    display: none;
    position: absolute;
    top: 4px;
    right: 4px;
    width: 22px;
    height: 22px;
    padding: 0;
    border: none;
    border-radius: 999px;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary, #6b6478);
    background: rgba(107, 33, 165, 0.08);
    font-size: 11px;
    line-height: 1;
    transition: background 0.15s ease, color 0.15s ease;
}

.site-companion-bubble-close:hover {
    color: var(--text-primary, #1e1b2e);
    background: rgba(107, 33, 165, 0.14);
}

.site-companion-bubble.is-user .site-companion-bubble-close {
    display: inline-flex;
}

.site-companion-bubble-inner.is-thinking {
    color: var(--text-secondary, #6b6478);
}

.site-companion-bubble-inner.is-thinking .site-companion-bubble-text {
    color: inherit;
}

.site-companion-bubble-inner::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: -7px;
    width: 14px;
    height: 14px;
    transform: translateX(-50%) rotate(45deg);
    background: inherit;
    border-right: 1px solid var(--atlas-line, rgba(107, 33, 165, 0.12));
    border-bottom: 1px solid var(--atlas-line, rgba(107, 33, 165, 0.12));
}

.site-companion-chat {
    display: none;
    width: min(260px, 78vw);
    gap: 6px;
    align-items: center;
    padding: 8px;
    border-radius: 14px;
    background: var(--atlas-card, rgba(255, 255, 255, 0.96));
    border: 1px solid var(--atlas-line, rgba(107, 33, 165, 0.12));
    box-shadow: var(--atlas-shadow, 0 12px 32px rgba(74, 29, 110, 0.14));
    pointer-events: auto;
}

.site-companion-chat input {
    flex: 1;
    min-width: 0;
    border: 1px solid var(--gray-200, #e8e4ef);
    border-radius: 10px;
    padding: 8px 10px;
    font-size: 13px;
    background: var(--bg-primary, #fff);
    color: var(--text-primary, #1e1b2e);
}

.site-companion-chat input:focus {
    outline: none;
    border-color: var(--primary-light, #8b5cf6);
}

.site-companion-chat button {
    flex-shrink: 0;
    border: none;
    border-radius: 10px;
    padding: 8px 12px;
    font-size: 13px;
    cursor: pointer;
    background: var(--gradient-primary, linear-gradient(135deg, #6b21a5, #a855f7));
    color: #fff;
}

.site-companion-chat button:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

.site-companion-figure {
    position: relative;
    width: var(--companion-size);
    cursor: grab;
    transform-origin: center bottom;
    animation: companion-idle 3.2s ease-in-out infinite;
}

.site-companion.is-dragging .site-companion-figure,
.site-companion.is-open .site-companion-figure,
.site-companion.is-shy .site-companion-figure {
    animation: none;
}

.site-companion-sprite-stack {
    position: relative;
    width: 100%;
}

.site-companion-sprite {
    display: block;
    width: 100%;
    height: auto;
    pointer-events: none;
    -webkit-user-drag: none;
    transition: opacity var(--companion-pose-duration) ease;
}

.site-companion-sprite--idle {
    opacity: 1;
}

.site-companion-sprite--shy {
    position: absolute;
    left: 0;
    bottom: 0;
    opacity: 0;
}

.site-companion-sprite--wave {
    position: absolute;
    left: 0;
    bottom: 0;
    opacity: 0;
}

.site-companion.is-shy .site-companion-sprite--idle {
    opacity: 0;
}

.site-companion.is-shy .site-companion-sprite--shy {
    opacity: 1;
}

.site-companion.is-waving:not(.is-shy):not(.is-open) .site-companion-sprite--idle {
    opacity: 0;
}

.site-companion.is-waving:not(.is-shy):not(.is-open) .site-companion-sprite--wave {
    opacity: 1;
}

@keyframes companion-idle {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

@media (prefers-reduced-motion: reduce) {
    .site-companion-sprite {
        transition-duration: 0.01ms;
    }

    .site-companion-figure {
        animation: none;
    }
}

@media (max-width: 768px) {
    :root {
        --companion-size: 128px;
    }
}

:root[data-theme="dark"] .site-companion-bubble-inner,
:root[data-theme="dark"] .site-companion-chat {
    background: rgba(30, 27, 46, 0.96);
}