body {
    color: #1f2937;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
}

.ai-standalone-page {
    background: #f2f7ff;
}

.ai-topbar {
    background: #071d3c;
    position: sticky;
    top: 0;
    z-index: 20;
}

.ai-topbar a {
    color: rgba(255, 255, 255, .86);
    text-decoration: none;
}

.ai-topbar a.active,
.ai-topbar a:hover {
    color: #fff;
}

.ai-page {
    padding-bottom: 56px;
}

.ai-hero {
    background: url("/static/saas/image/homeBg.png") center top / cover no-repeat, linear-gradient(135deg, #0b5ee8 0%, #12b8d7 100%);
    color: #fff;
    padding: 72px 0 96px;
}

.ai-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(320px, .6fr);
    gap: 40px;
    align-items: end;
}

.ai-kicker {
    color: #d7f7ff;
    font-size: 16px;
    margin-bottom: 14px;
}

.ai-hero h1 {
    font-size: 52px;
    line-height: 1.08;
    margin: 0 0 18px;
    font-weight: 700;
}

.ai-hero p {
    max-width: 720px;
    color: rgba(255, 255, 255, .88);
    font-size: 20px;
    line-height: 1.7;
    margin: 0;
}

.ai-example {
    background: rgba(255, 255, 255, .14);
    border: 1px solid rgba(255, 255, 255, .22);
    border-radius: 8px;
    padding: 24px;
}

.ai-example-title {
    font-size: 18px;
    margin-bottom: 16px;
}

.ai-example-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.ai-example-list span {
    background: rgba(255, 255, 255, .16);
    border-radius: 6px;
    padding: 8px 12px;
}

.ai-tools-shell .dy-bg {
    background-color: rgba(255, 255, 255, .82);
}

.ai-mode-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.ai-mode-tabs button {
    border: 1px solid #dbe8f7;
    background: #fff;
    color: #2563c9;
    padding: 9px 16px;
    border-radius: 8px;
    font-size: 15px;
}

.ai-mode-tabs button.active {
    border-color: #0d6efd;
    background: linear-gradient(135deg, #0d6efd 0%, #1db5d8 100%);
    color: #fff;
    box-shadow: 0 8px 22px rgba(13, 110, 253, .2);
}

.ai-workspace {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(360px, .72fr);
    gap: 20px;
}

.ai-standalone-page .ai-workspace {
    margin-top: -56px;
}

.ai-panel,
.ai-result,
.ai-contact {
    background: #fff;
    border: 1px solid #e6edf6;
    border-radius: 8px;
    box-shadow: 0 6px 18px rgba(20, 76, 150, .06);
}

.ai-panel {
    padding: 22px;
}

.ai-panel-head h2,
.ai-result h2 {
    font-size: 22px;
    margin: 0 0 8px;
    color: #14213d;
}

.ai-panel-head p,
.ai-result-head p {
    color: #6b7280;
    margin: 0 0 18px;
}

.ai-panel .form-control,
.ai-panel .form-select {
    border-color: #dbe7f5;
    min-height: 42px;
}

.ai-panel textarea.form-control {
    min-height: 128px;
}

.ai-panel .form-control:focus,
.ai-panel .form-select:focus {
    border-color: #59a9ff;
    box-shadow: 0 0 0 .2rem rgba(13, 110, 253, .1);
}

.ai-actions {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.ai-actions .btn-primary {
    background: linear-gradient(135deg, #0d6efd 0%, #18b5d8 100%);
    border: 0;
    min-width: 132px;
}

.ai-result {
    padding: 22px;
    min-height: 440px;
}

.ai-result-head {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: flex-start;
}

#resultBox {
    white-space: pre-wrap;
    word-break: break-word;
    background: #f7fbff;
    border: 1px solid #e4edf8;
    border-radius: 8px;
    padding: 18px;
    min-height: 300px;
    font-size: 15px;
    line-height: 1.8;
    color: #1f2937;
}

.ai-quick-grid {
    display: grid;
    gap: 16px;
}

.ai-choice-block .form-label {
    font-weight: 700;
    color: #1f2f46;
    margin-bottom: 8px;
}

.ai-choice-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.ai-choice-btn {
    border: 1px solid #d9e6f5;
    background: #f8fbff;
    color: #35506b;
    min-height: 36px;
    padding: 7px 13px;
    border-radius: 8px;
    line-height: 1.2;
}

.ai-choice-btn:hover {
    border-color: #87b8f6;
    color: #1764ca;
}

.ai-choice-btn.active {
    border-color: #0d6efd;
    background: #eaf3ff;
    color: #0b5ed7;
    font-weight: 700;
}

.ai-contact {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 20px 24px;
}

.ai-contact-standalone {
    margin-top: 24px;
}

.ai-contact-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 24px;
    color: #4b5563;
}

.ai-contact-meta a {
    color: #0d6efd;
    text-decoration: none;
    font-weight: 700;
}

.ai-qr-list {
    display: flex;
    gap: 16px;
}

.ai-qr-list div {
    width: 96px;
    text-align: center;
    color: #6b7280;
    font-size: 13px;
}

.ai-qr-list img {
    width: 82px;
    height: 82px;
    object-fit: cover;
    border-radius: 8px;
    border: 1px solid #e4edf8;
    display: block;
    margin: 0 auto 6px;
}

@media (max-width: 991px) {
    .ai-hero {
        padding: 48px 0 80px;
    }

    .ai-hero-grid,
    .ai-workspace {
        grid-template-columns: 1fr;
    }

    .ai-hero h1 {
        font-size: 40px;
    }

    .ai-panel,
    .ai-result {
        padding: 18px;
    }

    .ai-result {
        min-height: 360px;
    }

    #resultBox {
        min-height: 260px;
    }

    .ai-actions {
        flex-direction: column;
    }

    .ai-contact {
        flex-direction: column;
        align-items: stretch;
    }

    .ai-qr-list {
        justify-content: flex-start;
    }
}