/* 演示弹窗（点击“立即体验/产品演示”触发）
   设计原则：延续官网圆角/阴影/渐变体系，移动端友好，避免依赖外部库 */

.demo-modal {
    position: fixed;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 18px;
    z-index: 99999;
}

.demo-modal.is-open {
    display: flex;
}

.demo-modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.42);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    opacity: 0;
    transition: opacity .16s ease;
}

.demo-modal.is-open .demo-modal__backdrop {
    opacity: 1;
}

.demo-modal__dialog {
    position: relative;
    width: min(650px, 100%);
    max-height: min(82vh, 680px);
    overflow: hidden;
    border-radius: var(--radius-xl);
    background: rgba(255, 255, 255, .96);
    border: 1px solid rgba(15, 23, 42, .10);
    box-shadow: var(--shadow-xl);
    transform: translateY(10px) scale(.98);
    opacity: 0;
    transition: transform .18s ease, opacity .18s ease;
}

.demo-modal.is-open .demo-modal__dialog {
    transform: translateY(0) scale(1);
    opacity: 1;
}

.demo-modal__topbar {
    padding: 16px 16px 12px;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 14px;
    border-bottom: 1px solid rgba(15, 23, 42, .08);
    background: rgba(255, 255, 255, .92);
}

.demo-modal__title {
    font-size: 1.25rem;
    font-weight: 900;
    color: var(--secondary-color);
    letter-spacing: -0.4px;
    margin: 0;
}

.demo-modal__subtitle {
    margin-top: 6px;
    color: var(--gray);
    line-height: 1.7;
    font-size: 0.95rem;
}

.demo-modal__close {
    width: 44px;
    height: 44px;
    border-radius: 16px;
    border: 1px solid rgba(15, 23, 42, .10);
    background: rgba(255, 255, 255, .92);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all .2s ease;
    flex: 0 0 auto;
}

.demo-modal__close:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    color: var(--primary-color);
}

.demo-modal__body {
    padding: 21px;
    overflow: auto;
    max-height: calc(min(82vh, 680px) - 70px);
}

.demo-simple {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.demo-row {
    display: grid;
    grid-template-columns: 100px 1fr auto;
    gap: 10px;
    align-items: center;
    padding: 18px;
    border-radius: 18px;
    border: 1px solid rgba(15, 23, 42, .08);
    background: rgba(255, 255, 255, .92);
}

.demo-row__k {
    color: var(--gray);
    font-weight: 900;
    font-size: var(--font-size-sm);
}

.demo-row__v {
    color: var(--secondary-color);
    font-weight: 900;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    font-size: 0.92rem;
    word-break: break-all;
}

.demo-row__a {
    display: flex;
    gap: 8px;
    align-items: center;
}

.demo-cred {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: stretch;
    padding: 12px 12px;
    border-radius: 18px;
    border: 1px solid rgba(15, 23, 42, .08);
    background: rgba(255, 255, 255, .92);
}

.demo-cred__left {
    display: flex;
    gap: 8px;
    align-items: center;
    padding: 8px 10px;
    border-radius: 14px;
    background: rgba(255, 107, 53, 0.06);
    border: 1px solid rgba(255, 107, 53, 0.12);
}

.demo-cred__k {
    color: var(--gray);
    font-weight: 900;
    font-size: var(--font-size-sm);
}

.demo-cred__v {
    color: var(--secondary-color);
    font-weight: 1000;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    font-size: 0.95rem;
}

.demo-cred__right {
    margin-left: auto;
    display: flex;
    gap: 8px;
    align-items: center;
}

.demo-footnote {
    color: var(--gray);
    font-size: 0.92rem;
    line-height: 1.7;
    padding: 2px 4px;
}

.demo-toast {
    position: absolute;
    right: 18px;
    top: 74px;
    background: rgba(15, 23, 42, .84);
    color: rgba(255, 255, 255, .92);
    padding: 10px 12px;
    border-radius: 14px;
    font-size: 0.92rem;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transform: translateY(-6px);
    transition: all .16s ease;
    pointer-events: none;
}

.demo-toast.show {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 980px) {
    .demo-modal__title {
        font-size: 1.15rem;
    }

    .demo-modal__subtitle {
        font-size: 0.95rem;
    }

    .demo-row {
        grid-template-columns: 92px 1fr;
    }

    .demo-row__a {
        grid-column: 1 / -1;
        justify-content: flex-end;
    }

    .demo-toast {
        top: 68px;
    }
}