/* v13.10.2：解决方案专用三栏导航。复用全站明橙、白、黑灰令牌。 */
.solution-mega {
    position: fixed;
    top: 108px;
    left: 50%;
    width: min(calc(100vw - 48px), var(--shell));
    min-height: 430px;
    display: grid;
    grid-template-columns: 270px minmax(0, 1fr);
    visibility: hidden;
    overflow: hidden;
    opacity: 0;
    transform: translate(-50%, 15px);
    background: var(--paper);
    box-shadow: var(--shadow);
    transition: opacity .25s, transform .3s var(--ease), visibility .25s;
    pointer-events: none;
}

.site-header.is-fixed .solution-mega { top: 72px; }
.nav-item--solution-menu:hover .solution-mega,
.nav-item--solution-menu:focus-within .solution-mega {
    visibility: visible;
    opacity: 1;
    transform: translate(-50%, 0);
    pointer-events: auto;
}

.solution-mega__browser {
    padding: 34px 24px 30px;
    background: var(--surface-2);
}
.solution-mega__eyebrow {
    display: block;
    margin: 0 0 22px 10px;
    color: var(--muted);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: .14em;
}
.solution-mega__browser [role="navigation"] { display: grid; gap: 3px; }
.solution-mega__tab {
    min-height: 45px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 0 14px;
    color: var(--ink);
    font-size: 15px;
    font-weight: 700;
    transition: color .2s, background .2s, padding .25s;
}
.solution-mega__tab i { font-style: normal; opacity: 0; transform: translateX(-8px); transition: .25s; }
.solution-mega__tab:hover,
.solution-mega__tab:focus-visible,
.solution-mega__tab.is-active {
    padding-left: 18px;
    outline: 0;
    color: #fff;
    background: var(--accent-text);
}
.solution-mega__tab:hover i,
.solution-mega__tab:focus-visible i,
.solution-mega__tab.is-active i { opacity: 1; transform: none; }
.solution-mega__tab:focus-visible { outline: 2px solid var(--ink); outline-offset: -2px; }

.solution-mega__stage { min-width: 0; background: var(--paper); }
.solution-mega__panel {
    min-height: 430px;
    display: grid;
    grid-template-columns: minmax(0, .9fr) minmax(330px, 1.1fr);
    gap: 38px;
    align-items: center;
    padding: 42px;
    animation: solution-mega-in .32s var(--ease) both;
}
.solution-mega__panel[hidden] { display: none; }
@keyframes solution-mega-in {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: none; }
}
.solution-mega__copy > span {
    color: var(--accent-text);
    font-size: 10px;
    font-weight: 800;
    letter-spacing: .16em;
}
.solution-mega__copy h2 {
    margin: 10px 0 14px;
    color: var(--ink);
    font-size: 30px;
    line-height: 1.2;
}
.solution-mega__copy p {
    min-height: 68px;
    margin: 0;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.8;
}
.solution-mega__copy ul {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 9px 16px;
    margin: 22px 0 24px;
    padding: 0;
    list-style: none;
}
.solution-mega__copy li {
    position: relative;
    padding-left: 13px;
    color: var(--text);
    font-size: 12px;
    line-height: 1.5;
}
.solution-mega__copy li::before {
    content: "";
    position: absolute;
    top: .58em;
    left: 0;
    width: 5px;
    height: 5px;
    background: var(--accent);
}
.solution-mega__all {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    padding-bottom: 7px;
    border-bottom: 1px solid currentColor;
    color: var(--ink);
    font-size: 13px;
    font-weight: 700;
}
.solution-mega__all i { font-style: normal; transition: transform .25s; }
.solution-mega__all:hover { color: var(--accent-text); }
.solution-mega__all:hover i { transform: translateX(5px); }

.solution-mega__visual {
    position: relative;
    min-width: 0;
    overflow: hidden;
    aspect-ratio: 16 / 10;
    background: var(--surface-2);
}
.solution-mega__visual::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 40%, rgba(17,17,17,.72));
    pointer-events: none;
}
.solution-mega__visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .65s var(--ease);
}
.solution-mega__visual:hover img { transform: scale(1.035); }
.solution-mega__visual > span {
    position: absolute;
    z-index: 1;
    right: 24px;
    bottom: 20px;
    left: 24px;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 20px;
    color: white;
}
.solution-mega__visual strong { font-size: 20px; }
.solution-mega__visual small { font-size: 11px; opacity: .78; }

@media (max-width: 1100px) and (min-width: 901px) {
    .solution-mega { grid-template-columns: 225px minmax(0, 1fr); }
    .solution-mega__panel { grid-template-columns: minmax(240px, .9fr) minmax(280px, 1.1fr); gap: 26px; padding: 34px; }
    .solution-mega__copy h2 { font-size: 27px; }
    .solution-mega__copy p { font-size: 13px; }
}

@media (max-width: 900px) {
    .solution-mega { display: none; }
    .mobile-drawer { overflow-y: auto; overscroll-behavior: contain; }
    .mobile-drawer nav [role="group"] {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 0 16px;
        padding: 4px 0 10px;
        border-bottom: 1px solid rgba(255,255,255,.12);
    }
    .mobile-drawer nav [role="group"] a {
        min-width: 0;
        padding: 11px 0;
        border: 0;
        color: rgba(255,255,255,.7);
        font-size: 14px;
        font-weight: 600;
    }
    .mobile-drawer__contact { flex: 0 0 auto; margin-top: 32px; }
}

@media (prefers-reduced-motion: reduce) {
    .solution-mega,
    .solution-mega__panel,
    .solution-mega__visual img { animation: none; transition: none; }
}