/* ============================================================
   产品全景象限 QUADRANT（首页第二屏）
   深色背景 + 2x2 系列卡，配色对齐产品中心 banner / 页脚
   ============================================================ */
.quadrant-section {
    position: relative;
    padding: 96px 0 90px;
    color: #fff;
    background:
        radial-gradient(70% 90% at 85% 20%, rgba(96, 64, 210, 0.32) 0%, rgba(96, 64, 210, 0) 60%),
        radial-gradient(55% 75% at 10% 90%, rgba(45, 125, 255, 0.26) 0%, rgba(45, 125, 255, 0) 62%),
        linear-gradient(135deg, #160f2e 0%, #0d1838 50%, #241224 100%);
    overflow: hidden;
}

/* 顶部衔接桥：承接浅色 Hero（#eef2fa）向下溶入深色 */
.quadrant-bridge {
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 160px;
    background: linear-gradient(180deg, #eef2fa 0%, rgba(238, 242, 250, 0.55) 32%, rgba(238, 242, 250, 0) 100%);
    pointer-events: none;
    z-index: 0;
}
.quadrant-section .container { position: relative; z-index: 1; }

/* 标题区 */
.quadrant-head { margin-bottom: 18px; }
.quadrant-title-row {
    display: flex;
    align-items: center;
    gap: 16px;
}
.quadrant-title-bar {
    width: 5px;
    height: 34px;
    border-radius: 3px;
    background: linear-gradient(180deg, #2d7dff 0%, #6040d2 100%);
}
.quadrant-title {
    margin: 0;
    font-size: 32px;
    font-weight: 800;
    letter-spacing: 1px;
    color: #fff;
}
.quadrant-title-en {
    margin-left: 4px;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 3px;
    color: rgba(255, 255, 255, 0.35);
}
.quadrant-sub {
    margin: 16px 0 0 21px;
    font-size: 15px;
    color: rgba(255, 255, 255, 0.64);
    letter-spacing: 0.3px;
}

/* 2x2 网格 */
.quadrant-grid {
    margin-top: 48px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

/* 卡片：整体可点击 */
.q-card {
    position: relative;
    display: flex;
    align-items: stretch;
    background: linear-gradient(160deg, rgba(27, 36, 64, 0.92) 0%, rgba(18, 25, 48, 0.92) 100%);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 16px;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.q-card:hover {
    transform: translateY(-5px);
    border-color: color-mix(in srgb, var(--accent) 55%, transparent);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35), 0 0 0 1px color-mix(in srgb, var(--accent) 25%, transparent);
}

/* 顶部强调线 */
.q-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent) 0%, color-mix(in srgb, var(--accent) 30%, transparent) 100%);
}

/* 右上序号 */
.q-card-num {
    position: absolute;
    top: 14px;
    right: 18px;
    font-size: 22px;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.18);
    letter-spacing: 1px;
    z-index: 2;
}

/* 产品图区 */
.q-card-img {
    flex: 0 0 42%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px 30px;
    background:
        radial-gradient(80% 70% at 50% 45%, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0) 100%),
        rgba(255, 255, 255, 0.02);
}
.q-card-img img {
    max-width: 100%;
    max-height: 190px;
    width: auto;
    height: auto;
    object-fit: contain;
    transform: scale(var(--imgscale, 1));
    transition: transform 0.35s ease;
}
.q-card:hover .q-card-img img { transform: scale(calc(var(--imgscale, 1) * 1.05)); }

/* 文案区 */
.q-card-body {
    flex: 1;
    padding: 38px 28px 32px 26px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.q-card-name-row {
    display: flex;
    align-items: center;
    gap: 10px;
}
.q-card-dot {
    width: 9px;
    height: 9px;
    border-radius: 2px;
    background: var(--accent);
    flex: 0 0 auto;
}
.q-card-name {
    margin: 0;
    font-size: 21px;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.5px;
}
.q-card-desc {
    margin: 16px 0 0;
    font-size: 14px;
    line-height: 1.85;
    color: rgba(255, 255, 255, 0.66);
}
.q-card-cta {
    margin-top: 18px;
    font-size: 13px;
    font-weight: 600;
    color: var(--accent);
    opacity: 0;
    transform: translateX(-6px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}
.q-card:hover .q-card-cta {
    opacity: 1;
    transform: translateX(0);
}

/* 响应式 */
@media (max-width: 900px) {
    .quadrant-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
    .quadrant-section { padding: 70px 0 64px; }
    .quadrant-title { font-size: 26px; }
    .quadrant-title-en { display: none; }
    .q-card { flex-direction: column; }
    .q-card-img {
        flex: none;
        padding: 34px 20px 18px;
    }
    .q-card-img img { max-height: 170px; }
    .q-card-body { padding: 8px 24px 30px; }
    .q-card-cta { opacity: 1; transform: none; }
}