/* 与全站字体、主色协调 */
.ai-chat-page {
    --ai-ink: #0f172a;
    --ai-ink-soft: #334155;
    --ai-line: rgba(15, 23, 42, 0.08);
    --ai-accent: #2563eb;
    --ai-accent-deep: #1d4ed8;
    --ai-surface: #ffffff;
    --ai-muted: #64748b;
    --ai-glow: rgba(37, 99, 235, 0.35);
    font-family: var(--ky-font-sans);
    color: var(--ai-ink);
    margin: 0 auto;
    padding: 0.25rem 0 1rem;
    max-width: 920px;
}

.ai-chat-hero {
    position: relative;
    overflow: hidden;
    border-radius: 1.125rem;
    margin-bottom: 1.75rem;
    padding: 1.85rem 1.75rem 1.75rem;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
    color: var(--ai-ink);
    border: 1px solid var(--ai-line);
    box-shadow: 0 4px 16px rgba(15, 23, 42, 0.06);
}

.ai-chat-hero-glow {
    position: absolute;
    width: 420px;
    height: 420px;
    right: -120px;
    top: -180px;
    background: radial-gradient(circle, var(--ai-glow) 0%, transparent 68%);
    pointer-events: none;
    opacity: 0.9;
}

.ai-chat-hero-inner {
    position: relative;
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1.75rem;
}

.ai-chat-hero-text {
    flex: 1 1 16rem;
    max-width: 40rem;
}

.ai-chat-hero-kicker {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--ai-muted);
    margin-bottom: 0.5rem;
    font-family: var(--ky-font-sans);
}

.ai-chat-hero-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--ky-primary-ui);
    box-shadow: 0 0 8px rgba(59, 130, 246, 0.45);
}

.ai-chat-hero-title {
    font-family: var(--ky-font-display);
    font-weight: 700;
    font-size: clamp(1.65rem, 2.5vw, 2rem);
    letter-spacing: -0.02em;
    margin: 0 0 0.65rem;
    line-height: 1.2;
}

.ai-chat-hero-desc {
    margin: 0 0 1.15rem;
    font-size: 0.95rem;
    line-height: 1.65;
    color: var(--ai-ink-soft);
}

.ai-chat-hero-desc code {
    font-size: 0.85em;
    padding: 0.1em 0.35em;
    border-radius: 0.25rem;
    background: rgba(59, 130, 246, 0.08);
    color: var(--ai-accent-deep);
}

.ai-chat-hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.ai-chat-tag {
    font-size: 0.75rem;
    padding: 0.3rem 0.75rem;
    border-radius: 999px;
    border: 1px solid rgba(59, 130, 246, 0.25);
    background: rgba(59, 130, 246, 0.08);
    color: var(--ai-accent-deep);
}

.ai-chat-hero-card {
    flex: 0 0 auto;
    width: 9rem;
    height: 9rem;
    border-radius: 1rem;
    background: linear-gradient(160deg, rgba(45, 212, 191, 0.2) 0%, rgba(15, 23, 42, 0.5) 100%);
    border: 1px solid rgba(148, 163, 184, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
}

.ai-chat-hero-card-inner {
    text-align: center;
    padding: 1rem;
}

.ai-chat-hero-icon {
    font-size: 2.25rem;
    color: #93c5fd;
    display: block;
    margin-bottom: 0.35rem;
    filter: drop-shadow(0 4px 12px rgba(59, 130, 246, 0.45));
}

.ai-chat-hero-card-label {
    font-size: 0.75rem;
    color: rgba(248, 250, 252, 0.75);
    font-weight: 600;
    font-family: var(--ky-font-sans);
}

/* 主对话面板 */
.ai-chat-panel {
    border-radius: 1.125rem;
    background: var(--ai-surface);
    border: 1px solid var(--ai-line);
    box-shadow:
        0 4px 6px -1px rgba(15, 23, 42, 0.06),
        0 18px 40px -12px rgba(15, 23, 42, 0.12);
    overflow: hidden;
}

.ai-chat-panel-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    background: linear-gradient(90deg, rgba(239, 246, 255, 0.95), rgba(248, 250, 252, 0.98));
    border-bottom: 1px solid var(--ai-line);
}

.ai-chat-panel-title {
    font-family: var(--ky-font-sans);
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--ai-ink);
}

.ai-chat-panel-hint {
    font-size: 0.72rem;
    color: var(--ai-muted);
}

.ai-chat-messages {
    min-height: 18rem;
    max-height: min(68vh, 560px);
    overflow-y: auto;
    overflow-x: hidden;
    padding: 1.5rem 1.5rem 1.65rem;
    scroll-behavior: smooth;
    background:
        linear-gradient(180deg, rgba(248, 250, 252, 0.5) 0%, transparent 80px),
        repeating-linear-gradient(
            -12deg,
            transparent,
            transparent 11px,
            rgba(148, 163, 184, 0.04) 11px,
            rgba(148, 163, 184, 0.04) 12px
        );
}

.ai-chat-empty {
    text-align: center;
    padding: 2.5rem 1.25rem 2rem;
    max-width: 28rem;
    margin: 0 auto;
}

.ai-chat-empty-title {
    font-family: var(--ky-font-sans);
    font-weight: 600;
    font-size: 1.1rem;
    margin: 0 0 0.35rem;
    color: var(--ai-ink);
}

.ai-chat-empty-sub {
    margin: 0 0 1.5rem;
    font-size: 0.92rem;
    color: var(--ai-muted);
    line-height: 1.6;
}

.ai-chat-chips {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    align-items: stretch;
}

.ai-chat-chip {
    appearance: none;
    border: 1px solid rgba(37, 99, 235, 0.22);
    background: linear-gradient(180deg, #ffffff, #f8fafc);
    color: var(--ai-accent-deep);
    font-size: 0.88rem;
    padding: 0.65rem 1rem;
    border-radius: 0.65rem;
    text-align: left;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.ai-chat-chip:hover {
    border-color: var(--ky-primary-ui);
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.12);
    transform: translateY(-1px);
}

.ai-chat-chip:active {
    transform: translateY(0);
}

/* 消息行 */
.ai-chat-row {
    display: flex;
    gap: 0.85rem;
    margin-bottom: 1.35rem;
    align-items: flex-end;
}

.ai-chat-row-user {
    flex-direction: row-reverse;
}

.ai-chat-avatar {
    flex: 0 0 2.25rem;
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    background: linear-gradient(145deg, #dbeafe, #eff6ff);
    color: var(--ai-accent-deep);
    border: 1px solid rgba(37, 99, 235, 0.2);
}

.ai-chat-row-user .ai-chat-avatar {
    background: linear-gradient(145deg, #1e293b, #334155);
    color: #f1f5f9;
    border-color: rgba(148, 163, 184, 0.35);
}

.ai-chat-avatar-pulse {
    animation: ai-chat-pulse 1.6s ease-in-out infinite;
}

@keyframes ai-chat-pulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(45, 212, 191, 0.35); }
    50% { opacity: 0.92; box-shadow: 0 0 0 6px rgba(45, 212, 191, 0); }
}

.ai-chat-bubble-wrap {
    max-width: min(100%, 38rem);
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.ai-chat-row-user .ai-chat-bubble-wrap {
    align-items: flex-end;
}

.ai-chat-meta {
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--ai-muted);
    font-family: var(--ky-font-sans);
}

.ai-chat-bubble {
    padding: 0.9rem 1.15rem;
    border-radius: 1rem;
    background: #f8fafc;
    border: 1px solid var(--ai-line);
    box-shadow: 0 2px 8px rgba(15, 23, 42, 0.04);
}

.ai-chat-row-user .ai-chat-bubble {
    background: linear-gradient(145deg, #1e40af 0%, #2563eb 55%, #3b82f6 100%);
    border-color: rgba(37, 99, 235, 0.35);
    color: #f0fdfa;
    border-bottom-right-radius: 0.35rem;
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.22);
}

.ai-chat-row-assistant .ai-chat-bubble {
    border-bottom-left-radius: 0.35rem;
}

.ai-chat-text {
    white-space: pre-wrap;
    word-break: break-word;
    line-height: 1.68;
    font-size: 0.95rem;
}

.ai-chat-row-user .ai-chat-meta {
    color: rgba(100, 116, 139, 0.9);
}

.ai-chat-bubble-pending {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    min-height: 2.75rem;
}

.ai-chat-typing {
    display: inline-flex;
    gap: 4px;
    align-items: center;
}

.ai-chat-typing span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--ai-accent);
    animation: ai-chat-bounce 1.2s ease-in-out infinite;
}

.ai-chat-typing span:nth-child(2) {
    animation-delay: 0.15s;
}

.ai-chat-typing span:nth-child(3) {
    animation-delay: 0.3s;
}

@keyframes ai-chat-bounce {
    0%, 80%, 100% {
        transform: translateY(0);
        opacity: 0.45;
    }
    40% {
        transform: translateY(-5px);
        opacity: 1;
    }
}

.ai-chat-typing-label {
    font-size: 0.82rem;
    color: var(--ai-muted);
}

/* 输入区 */
.ai-chat-composer {
    padding: 1.35rem 1.5rem 1.5rem;
    background: linear-gradient(180deg, rgba(248, 250, 252, 0.95), #ffffff);
    border-top: 1px solid var(--ai-line);
}

.ai-chat-label {
    display: block;
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--ai-muted);
    margin-bottom: 0.55rem;
    font-family: var(--ky-font-sans);
}

.ai-chat-composer-row {
    display: flex;
    gap: 0.9rem;
    align-items: stretch;
    flex-wrap: wrap;
}

.ai-chat-textarea {
    flex: 1 1 14rem;
    min-width: 12rem;
    min-height: 5rem;
    padding: 0.85rem 1rem;
    border-radius: 0.75rem;
    border: 1px solid var(--ai-line);
    font-size: 0.95rem;
    line-height: 1.5;
    resize: vertical;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
    background: #fff;
}

.ai-chat-textarea:focus {
    outline: none;
    border-color: rgba(37, 99, 235, 0.45);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.ai-chat-send {
    flex: 0 0 auto;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.3rem;
    min-width: 5.75rem;
    padding: 0.75rem 1.1rem;
    border: none;
    border-radius: 0.75rem;
    cursor: pointer;
    font-family: var(--ky-font-sans);
    font-weight: 600;
    font-size: 0.85rem;
    color: #fff;
    background: linear-gradient(160deg, #1e40af 0%, #2563eb 45%, #3b82f6 100%);
    box-shadow: 0 6px 18px rgba(37, 99, 235, 0.35);
    transition: transform 0.12s ease, box-shadow 0.12s ease, opacity 0.12s ease;
}

.ai-chat-send:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 10px 26px rgba(37, 99, 235, 0.4);
}

.ai-chat-send:active:not(:disabled) {
    transform: translateY(0);
}

.ai-chat-send:disabled {
    opacity: 0.65;
    cursor: not-allowed;
    box-shadow: none;
}

.ai-chat-send .bi {
    font-size: 1.1rem;
}

.ai-chat-send-text {
    font-size: 0.78rem;
    letter-spacing: 0.02em;
}

.ai-chat-keyboard-hint {
    margin-top: 0.65rem;
    font-size: 0.72rem;
    color: var(--ai-muted);
    text-align: center;
}

.ai-chat-send-spinner {
    width: 1.1rem;
    height: 1.1rem;
    border: 2px solid rgba(255, 255, 255, 0.35);
    border-top-color: #fff;
    border-radius: 50%;
    animation: ai-chat-spin 0.7s linear infinite;
}

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

.ai-chat-error {
    margin-top: 0.75rem;
    padding: 0.65rem 0.85rem;
    border-radius: 0.65rem;
    font-size: 0.88rem;
    line-height: 1.45;
    color: #9a3412;
    background: linear-gradient(90deg, #fff7ed, #ffedd5);
    border: 1px solid rgba(251, 146, 60, 0.35);
}

@media (max-width: 576px) {
    .ai-chat-hero-card {
        display: none;
    }

    .ai-chat-send {
        width: 100%;
        flex-direction: row;
        justify-content: center;
        min-height: 2.75rem;
    }
}