/* 产品页 — 五屏全页滚动 */

html:has(body.stbledge-product-page) {
    height: 100%;
}

body.stbledge-product-page {
    overflow: hidden !important;
    height: 100vh !important;
    background: #000 !important;
}

body.stbledge-product-page nav.site-nav {
    position: fixed;
    z-index: 200;
    color: #fff !important;
}

body.stbledge-product-page .logo-light {
    opacity: 1 !important;
}

body.stbledge-product-page .logo-dark {
    opacity: 0 !important;
}

body.stbledge-product-page .nav-links a {
    color: #fff !important;
    mix-blend-mode: normal !important;
}

.product-page {
    --product-accent: #0077FF;
    --product-feature-gutter: 3.75rem;
    position: relative;
    color: #fff;
    isolation: isolate;
    background-color: #000000;
}

.product-page,
.product-page * {
    mix-blend-mode: normal !important;
}

.product-page .panel {
    height: 100vh;
    overflow: hidden;
    position: relative;
    z-index: 2;
    padding: 6.5rem 3rem 4rem;
    box-sizing: border-box;
    background-color: #000000;
}

/* ── 第 1 屏 Hero ── */

.product-panel-hero {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6.5rem 3rem;
}

.product-hero-inner {
    position: relative;
    z-index: 3;
    text-align: center;
    max-width: 48rem;
}

.product-hero-title {
    margin: 0;
    font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-size: 5rem;
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -0.04em;
    color: #F9FBF9;
}

.product-hero-sub {
    margin: 0.5rem 0 0;
    font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-size: 5rem;
    font-weight: 300;
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: #F9FBF9;
}

.product-hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
    margin-top: 3rem;
    flex-wrap: wrap;
}

.product-hero-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 10rem;
    padding: 0.875rem 2rem;
    font-family: 'Alibaba PuHuiTi', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-size: 1rem;
    line-height: 1.2;
    text-decoration: none;
    border-radius: 0;
    transition: opacity 0.25s;
}

.product-hero-btn:hover {
    opacity: 0.8;
}

.product-hero-btn--ghost {
    color: #ffffff;
    background: transparent;
    border: none;
    padding-left: 0;
    padding-right: 0;
    min-width: auto;
}

.product-hero-btn--solid {
    color: #000000;
    background: #ffffff;
    border: 1px solid #ffffff;
}

/* ── 第 2 / 3 / 4 屏 功能区块 ── */

.product-page .product-panel-feature {
    padding-left: var(--frame-inset-x, clamp(4rem, 10vw, 8rem));
    padding-right: var(--frame-inset-x, clamp(4rem, 10vw, 8rem));
}

.product-panel-feature {
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-feature-inner {
    position: relative;
    z-index: 3;
    width: 100%;
    max-width: none;
    margin: 0;
}

.product-feature-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: 4rem;
    row-gap: 2rem;
    align-items: center;
    width: 100%;
}

/* 左文右图：左栏距左竖线、右栏距右竖线，间距对称 */
.product-panel-feature--text-left .product-feature-copy {
    grid-column: 1;
    grid-row: 1;
    padding-left: var(--product-feature-gutter);
    box-sizing: border-box;
}

.product-panel-feature--text-left .product-feature-visual {
    grid-column: 2;
    grid-row: 1;
    padding-right: var(--product-feature-gutter);
    box-sizing: border-box;
}

/* 左图右文：同样规则，仅列互换 */
.product-panel-feature--text-right .product-feature-visual {
    grid-column: 1;
    grid-row: 1;
    padding-left: var(--product-feature-gutter);
    box-sizing: border-box;
}

.product-panel-feature--text-right .product-feature-copy {
    grid-column: 2;
    grid-row: 1;
    padding-right: var(--product-feature-gutter);
    box-sizing: border-box;
}

/* Agent 图像引擎：文字占满右栏并靠右对齐（仅本屏） */
#product-feature-2.product-panel-feature--text-right .product-feature-copy {
    width: 100%;
    max-width: none;
    text-align: right;
    padding-left: var(--product-feature-gutter);
    padding-right: calc(var(--product-feature-gutter) * 2);
}

#product-feature-2.product-panel-feature--text-right .product-feature-label {
    justify-content: flex-end;
}

.product-feature-page-title {
    margin: 0 0 2rem;
    font-family: 'Alibaba PuHuiTi', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-size: 3rem;
    font-weight: 400;
    line-height: 1.15;
    letter-spacing: -0.02em;
}

.product-feature-page-title-pre {
    color: var(--product-accent);
}

.product-feature-page-title-rest {
    color: #ffffff;
}

.product-feature-label {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    margin: 0 0 1.25rem;
    font-family: 'Alibaba PuHuiTi', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-size: 1.5rem;
    font-weight: 400;
    line-height: 1.4;
    color: #ffffff;
}

.product-feature-label-mark {
    flex-shrink: 0;
    width: 0.625rem;
    height: 0.625rem;
    background: var(--product-accent);
}

.product-feature-text {
    margin: 0;
    font-family: 'Alibaba PuHuiTi', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-size: 1.5rem;
    font-weight: 400;
    line-height: 1.75;
    color: rgba(255, 255, 255, 0.82);
    max-width: 100%;
    width: 100%;
}

.product-feature-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 0;
    width: 100%;
}

.product-feature-svg {
    width: 100%;
    max-width: clamp(22rem, 46vw, 32rem);
    max-height: min(58vh, 32rem);
}

.product-feature-svg svg {
    display: block;
    width: 100%;
    height: auto;
    max-height: min(58vh, 32rem);
}

.product-feature-svg--placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 28rem;
    aspect-ratio: 1 / 1;
    border: 1px dashed rgba(255, 255, 255, 0.18);
    color: rgba(255, 255, 255, 0.28);
    font-size: 0.875rem;
    letter-spacing: 0.08em;
}

/* 第 5 屏联系我们 — 见 css/contact-panel.css */

@media (max-width: 768px) {
    /* 移动端长页滚动：覆盖桌面分屏的 overflow / 100vh 锁定 */
    html:has(body.stbledge-product-page) {
        height: auto !important;
        scroll-behavior: smooth;
    }

    body.stbledge-product-page {
        overflow-y: auto !important;
        overflow-x: hidden !important;
        height: auto !important;
        min-height: 100vh;
        touch-action: pan-y;
        -webkit-overflow-scrolling: touch;
    }

    body.stbledge-product-page .product-page {
        height: auto;
        overflow: visible;
    }

    body.stbledge-product-page .product-page .panel {
        height: auto !important;
        min-height: 100vh;
        overflow: visible !important;
        scroll-margin-top: 3.5rem;
    }

    body.stbledge-product-page .about-panel-contact {
        overflow: visible !important;
    }

    .product-page .panel {
        padding: 6rem 1.5rem 3rem;
    }

    .product-page .product-panel-feature {
        padding-left: var(--frame-inset-x, 1.5rem);
        padding-right: var(--frame-inset-x, 1.5rem);
    }

    .product-page {
        --product-feature-gutter: 2.25rem;
    }

    .product-feature-svg {
        max-width: min(20rem, 78vw);
        max-height: min(42vh, 22rem);
    }

    .product-feature-svg svg {
        max-height: min(42vh, 22rem);
    }

    .product-feature-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .product-panel-feature--text-left .product-feature-copy,
    .product-panel-feature--text-right .product-feature-copy,
    .product-panel-feature--text-left .product-feature-visual,
    .product-panel-feature--text-right .product-feature-visual {
        grid-column: 1;
        grid-row: auto;
        box-sizing: border-box;
    }

    /* 移动端：文字与 SVG 左右内边距对称统一 */
    .product-panel-feature--text-left .product-feature-copy,
    .product-panel-feature--text-right .product-feature-copy {
        padding-left: var(--product-feature-gutter);
        padding-right: var(--product-feature-gutter);
        text-align: left;
    }

    .product-panel-feature--text-left .product-feature-visual,
    .product-panel-feature--text-right .product-feature-visual {
        padding-left: var(--product-feature-gutter);
        padding-right: var(--product-feature-gutter);
    }

    .product-panel-feature--text-right .product-feature-label {
        justify-content: flex-start;
    }

    .product-panel-feature--text-right .product-feature-visual {
        order: -1;
    }

    /* Agent 屏：重置桌面专用样式，与其它功能屏完全一致 */
    #product-feature-2.product-panel-feature--text-right .product-feature-copy {
        padding-left: var(--product-feature-gutter);
        padding-right: var(--product-feature-gutter);
        text-align: left;
    }

    #product-feature-2.product-panel-feature--text-right .product-feature-label {
        justify-content: flex-start;
    }

    #product-feature-2.product-panel-feature--text-right .product-feature-visual {
        order: unset;
        padding-left: var(--product-feature-gutter);
        padding-right: var(--product-feature-gutter);
    }

    .product-hero-title {
        font-size: clamp(2.25rem, 11vw, 3.5rem);
    }

    .product-hero-sub {
        margin-top: 0.75rem;
        font-size: 1.75rem;
        font-weight: 300;
        line-height: 1.2;
        letter-spacing: -0.02em;
        white-space: nowrap;
    }

    .product-hero-actions {
        display: none;
    }

    .product-feature-page-title {
        font-size: clamp(2rem, 8vw, 3rem);
    }

    .product-feature-label,
    .product-feature-text {
        font-size: clamp(1.125rem, 4vw, 1.5rem);
    }
}