/**
 * 场景解决方案页设计体系 sol-*
 * 渲染于 application/index/view/page/scene.html, 数据来自 app\common\library\Scene
 * 主题约定: rem 字号(base.css), main_center 容器, 主蓝 #4974fd, 深藏青 #000135
 */

/* ============ 吸顶锚点导航 ============ */
.sol-nav {
    position: sticky;
    top: 4.55rem; /* 与固定头部等高 */
    z-index: 900;
    background: rgba(255, 255, 255, 0.97);
    box-shadow: 0 0.15rem 0.8rem rgba(22, 32, 58, 0.06);
}

.sol-nav-in {
    display: flex;
    justify-content: center;
    align-items: stretch;
    max-width: 63.64rem;
    margin: 0 auto;
}

.sol-nav-in a {
    position: relative;
    padding: 0 1.1rem;
    line-height: 2.7rem;
    font-size: 0.78rem;
    color: #5b6472;
    white-space: nowrap;
    transition: color 0.2s;
}

.sol-nav-in a::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 0;
    width: 0;
    height: 0.18rem;
    background: linear-gradient(90deg, #4974fd, #6f96ff);
    border-radius: 0.18rem 0.18rem 0 0;
    transform: translateX(-50%);
    transition: width 0.25s;
}

.sol-nav-in a:hover,
.sol-nav-in a.active {
    color: #3d63e8;
}

.sol-nav-in a.active::after {
    width: 60%;
}

/* 解决方案页二级菜单(9项): 平板起允许横向滑动, 保证移动端适配 */
@media (max-width: 1024px) {
    .sol-nav.sol-pagenav .sol-nav-in {
        justify-content: flex-start;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .sol-nav.sol-pagenav .sol-nav-in::-webkit-scrollbar {
        display: none;
    }
}

/* 锚点落点避开固定头部+导航 */
.sol-hero,
.sol-sec,
.sol-dark {
    scroll-margin-top: 7.6rem;
}

/* ============ 区块通用 ============ */
.sol-sec {
    padding: 3.4rem 0;
}

.sol-sec.sol-alt {
    background: #f6f8fd;
}

.sol-head {
    text-align: center;
    margin-bottom: 2.1rem;
}

.sol-head-sub {
    display: block;
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.3em;
    color: #8fa4e8;
    text-transform: uppercase;
}

.sol-head h2 {
    position: relative;
    display: inline-block;
    margin: 0.5rem 0 0;
    font-size: 1.45rem;
    font-weight: 700;
    color: #000135;
    line-height: 1.4;
}

.sol-head-line {
    display: block;
    width: 2.6rem;
    height: 0.16rem;
    margin: 0.7rem auto 0;
    background: linear-gradient(90deg, #4974fd, #6f96ff);
    border-radius: 0.16rem;
}

.sol-head-desc {
    max-width: 46rem;
    margin: 0.9rem auto 0;
    font-size: 0.74rem;
    line-height: 1.9;
    color: #555e6d;
    text-align: justify;
}

.sol-head-light h2 {
    color: #fff;
}

.sol-head-light .sol-head-sub {
    color: #8ea6ff;
}

/* ============ 方案概述 Hero ============ */
.sol-hero {
    padding: 3.1rem 0 3.6rem;
    background: linear-gradient(180deg, #f1f5ff 0%, #ffffff 100%);
}

.sol-hero-grid {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 3rem;
    align-items: center;
}

.sol-eyebrow {
    display: inline-block;
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.28em;
    color: #4974fd;
    text-transform: uppercase;
}

.sol-hero-txt h1 {
    margin: 0.7rem 0 0;
    font-size: 1.68rem;
    font-weight: 700;
    color: #000135;
    line-height: 1.4;
}

.sol-lead {
    margin: 1rem 0 0;
    font-size: 0.78rem;
    line-height: 1.95;
    color: #555e6d;
    text-align: justify;
}

.sol-tags {
    margin-top: 1.1rem;
}

.sol-tags span {
    display: inline-block;
    margin: 0 0.5rem 0.5rem 0;
    padding: 0.28rem 0.9rem;
    font-size: 0.7rem;
    color: #3d63e8;
    background: rgba(73, 116, 253, 0.07);
    border: 1px solid rgba(73, 116, 253, 0.32);
    border-radius: 999px;
}

.sol-hero-btns {
    margin-top: 1.4rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.sol-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.62rem 1.55rem;
    font-size: 0.76rem;
    color: #fff;
    background: linear-gradient(135deg, #3d63e8, #6f96ff);
    border-radius: 999px;
    box-shadow: 0 0.5rem 1.3rem rgba(73, 116, 253, 0.35);
    transition: transform 0.2s, box-shadow 0.2s;
}

.sol-btn i {
    font-size: 0.9rem;
}

.sol-btn:hover {
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 0.7rem 1.6rem rgba(73, 116, 253, 0.45);
}

.sol-btn-ghost {
    color: #3d63e8;
    background: #fff;
    border: 1px solid #c9d4ec;
    box-shadow: none;
}

.sol-btn-ghost:hover {
    color: #3d63e8;
    border-color: #4974fd;
    box-shadow: 0 0.6rem 1.2rem rgba(73, 116, 253, 0.18);
}

/* 主图 + 悬浮数据卡 */
.sol-hero-fig {
    position: relative;
}

.sol-hero-fig::before {
    content: '';
    position: absolute;
    top: -0.75rem;
    right: -0.75rem;
    bottom: 0.75rem;
    left: 0.75rem;
    border: 1px solid rgba(73, 116, 253, 0.3);
    border-radius: 0.95rem;
}

.sol-hero-img {
    position: relative;
    z-index: 1;
    border-radius: 0.9rem;
    overflow: hidden;
    box-shadow: 0 1rem 2.2rem rgba(22, 32, 58, 0.16);
}

.sol-hero-img img {
    display: block;
    width: 100%;
    aspect-ratio: 4 / 2.85;
    object-fit: cover;
}

.sol-stat {
    position: absolute;
    z-index: 2;
    background: #fff;
    border-radius: 0.6rem;
    padding: 0.55rem 1rem;
    box-shadow: 0 0.7rem 1.7rem rgba(22, 32, 58, 0.15);
}

.sol-stat b {
    display: block;
    font-size: 0.98rem;
    font-weight: 700;
    color: #3d63e8;
    line-height: 1.3;
}

.sol-stat span {
    display: block;
    margin-top: 0.15rem;
    font-size: 0.62rem;
    color: #7a8394;
    white-space: nowrap;
}

.sol-stat-1 {
    top: 1.1rem;
    right: -0.95rem;
}

.sol-stat-2 {
    bottom: 1.2rem;
    left: -1rem;
}

/* ============ 行业痛点 ============ */
.sol-pains-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.1rem;
}

.sol-pain {
    position: relative;
    overflow: hidden;
    background: #fff;
    border: 1px solid #e8edf5;
    border-radius: 0.7rem;
    padding: 1.7rem 1.2rem 1.4rem;
    transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}

.sol-pain::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0;
    background: linear-gradient(180deg, #4974fd, #6f96ff);
    transition: width 0.25s;
}

.sol-pain:hover {
    transform: translateY(-4px);
    border-color: rgba(73, 116, 253, 0.4);
    box-shadow: 0 0.9rem 1.9rem rgba(22, 32, 58, 0.09);
}

.sol-pain:hover::before {
    width: 0.22rem;
}

.sol-pain .num {
    position: absolute;
    top: 0.55rem;
    right: 0.9rem;
    font-size: 1.95rem;
    font-weight: 800;
    font-style: italic;
    line-height: 1;
    color: #eef2fb;
}

.sol-pain h4 {
    position: relative;
    font-size: 0.95rem;
    font-weight: 600;
    color: #16203a;
    margin: 0 0 0.55rem;
}

.sol-pain p {
    position: relative;
    font-size: 0.71rem;
    line-height: 1.8;
    color: #555e6d;
    text-align: justify;
}

/* ============ 系统架构 ============ */
.sol-arch-grid {
    display: grid;
    grid-template-columns: 1.08fr 0.92fr;
    gap: 2.6rem;
    align-items: center;
}

.sol-arch-fig {
    background: #fff;
    border: 1px solid #e8edf5;
    border-radius: 0.8rem;
    padding: 0.8rem;
    box-shadow: 0 0.6rem 1.4rem rgba(22, 32, 58, 0.06);
}

.sol-arch-fig img {
    display: block;
    width: 100%;
    border-radius: 0.5rem;
}

.sol-arch-steps {
    position: relative;
}

.sol-arch-steps::before {
    content: '';
    position: absolute;
    left: 1.05rem;
    top: 1rem;
    bottom: 1rem;
    width: 1px;
    background: #dbe4f5;
}

.sol-step {
    position: relative;
    display: flex;
    gap: 1rem;
    padding-bottom: 1.5rem;
}

.sol-step:last-child {
    padding-bottom: 0;
}

.sol-step-num {
    flex: none;
    width: 2.1rem;
    height: 2.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.78rem;
    font-weight: 700;
    color: #fff;
    background: linear-gradient(135deg, #4974fd, #6f96ff);
    border-radius: 50%;
    box-shadow: 0 0.4rem 0.9rem rgba(73, 116, 253, 0.35);
    z-index: 1;
}

.sol-step-txt h4 {
    font-size: 0.92rem;
    font-weight: 600;
    color: #16203a;
    margin: 0.25rem 0 0.35rem;
}

.sol-step-txt p {
    font-size: 0.72rem;
    line-height: 1.8;
    color: #555e6d;
}

/* 能力胶囊 */
.sol-caps {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.6rem 0.7rem;
    margin-top: 2.1rem;
}

.sol-caps span {
    padding: 0.35rem 1.05rem;
    font-size: 0.7rem;
    color: #4a5779;
    background: #fff;
    border: 1px solid #d7e0f4;
    border-radius: 999px;
    transition: all 0.25s;
}

.sol-caps span:hover {
    color: #fff;
    background: linear-gradient(135deg, #3d63e8, #6f96ff);
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 0.5rem 1rem rgba(73, 116, 253, 0.28);
}

/* 定位原理图 */
.sol-principle {
    max-width: 40rem;
    margin: 2.3rem auto 0;
    text-align: center;
}

.sol-principle img {
    display: block;
    width: 100%;
    background: #fff;
    border: 1px solid #e8edf5;
    border-radius: 0.7rem;
    padding: 0.6rem;
    box-sizing: border-box;
}

.sol-principle figcaption {
    margin-top: 0.75rem;
    font-size: 0.7rem;
    color: #7a8394;
}

/* ============ 核心功能 ============ */
.sol-feat-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.2rem;
}

.sol-feat {
    position: relative;
    overflow: hidden;
    background: #fff;
    border: 1px solid #e8edf5;
    border-radius: 0.7rem;
    padding: 1.8rem 1.4rem 1.6rem;
    transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}

.sol-feat::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 2.2rem;
    height: 0.16rem;
    background: linear-gradient(90deg, #4974fd, #6f96ff);
    transition: width 0.3s;
}

.sol-feat:hover {
    transform: translateY(-4px);
    border-color: rgba(73, 116, 253, 0.4);
    box-shadow: 0 0.9rem 1.9rem rgba(22, 32, 58, 0.09);
}

.sol-feat:hover::before {
    width: 100%;
}

.sol-feat-icon {
    width: 2.55rem;
    height: 2.55rem;
    margin-bottom: 1rem;
}

.sol-feat-icon img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.sol-feat h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: #16203a;
    margin: 0;
}

.sol-feat p {
    font-size: 0.72rem;
    line-height: 1.85;
    color: #555e6d;
    margin: 0.55rem 0 0;
    text-align: justify;
}

/* 孤行宽卡: 3n+1 落单时通栏横排 */
.sol-feat-grid > .sol-feat:last-child:nth-child(3n+1) {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    gap: 1.3rem;
}

.sol-feat-grid > .sol-feat:last-child:nth-child(3n+1) .sol-feat-icon {
    flex: none;
    margin-bottom: 0;
}

/* ============ 方案优势(深色玻璃卡) ============ */
.sol-dark {
    position: relative;
    padding: 3.6rem 0;
    background: linear-gradient(135deg, #070f2c 0%, #13245c 62%, #182e74 100%);
    overflow: hidden;
}

.sol-dark::before {
    content: '';
    position: absolute;
    top: -6rem;
    right: -6rem;
    width: 22rem;
    height: 22rem;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(73, 116, 253, 0.28), transparent 68%);
}

.sol-dark::after {
    content: '';
    position: absolute;
    bottom: -7rem;
    left: -5rem;
    width: 20rem;
    height: 20rem;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(111, 150, 255, 0.16), transparent 68%);
}

.sol-dark .main_center {
    position: relative;
    z-index: 1;
}

.sol-adv-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.2rem;
}

.sol-adv {
    position: relative;
    overflow: hidden;
    padding: 1.6rem 1.4rem;
    background: rgba(255, 255, 255, 0.055);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 0.7rem;
    transition: transform 0.25s, background 0.25s, border-color 0.25s;
}

.sol-adv:hover {
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.09);
    border-color: rgba(111, 150, 255, 0.55);
}

.sol-adv .num {
    display: block;
    font-size: 1.9rem;
    font-weight: 800;
    font-style: italic;
    line-height: 1;
    color: rgba(129, 157, 255, 0.3);
    margin-bottom: 0.7rem;
}

.sol-adv h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: #fff;
    margin: 0 0 0.45rem;
}

.sol-adv p {
    font-size: 0.71rem;
    line-height: 1.8;
    color: rgba(226, 232, 248, 0.68);
    margin: 0;
}

.sol-adv-grid > .sol-adv:last-child:nth-child(3n+1) {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    gap: 1.3rem;
}

.sol-adv-grid > .sol-adv:last-child:nth-child(3n+1) .num {
    flex: none;
    margin-bottom: 0;
}

/* ============ 应用图示(照片墙) ============ */
.sol-gallery {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.8rem;
    grid-auto-flow: dense;
}

.sol-gallery .shot {
    position: relative;
    overflow: hidden;
    border: 1px solid #e8edf5;
    border-radius: 0.55rem;
    cursor: zoom-in;
    background: #f2f5fb;
}

.sol-gallery .shot img {
    display: block;
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    transition: transform 0.5s;
}

.sol-gallery .shot:hover img {
    transform: scale(1.07);
}

.sol-gallery .shot .cap {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 1.5rem 0.6rem 0.6rem;
    font-size: 0.68rem;
    text-align: center;
    color: #fff;
    background: linear-gradient(180deg, transparent, rgba(7, 15, 44, 0.72));
    opacity: 0;
    transition: opacity 0.3s;
}

.sol-gallery .shot:hover .cap {
    opacity: 1;
}

.sol-gallery .shot:first-child {
    grid-column: span 2;
    grid-row: span 2;
}

.sol-gallery .shot:first-child img {
    aspect-ratio: auto;
    height: 100%;
}

/* 尾图跨2列补满整行: 8张 = 1大图(2x2) + 6小图 + 1宽幅(2x1) = 12格, 3行零留白 */
.sol-gallery .shot:last-child {
    grid-column: span 2;
}

/* 行高由同行4:3小图决定, 宽幅图绝对定位铺满, 不参与行高计算 */
.sol-gallery .shot:last-child img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    aspect-ratio: auto;
    object-fit: cover;
}

/* ============ 延伸阅读 ============ */
.sol-related {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.1rem;
}

.sol-rel-item {
    display: block;
    background: #fff;
    border: 1px solid #e8edf5;
    border-radius: 0.7rem;
    padding: 1.35rem 1.25rem 1.2rem;
    transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}

.sol-rel-item:hover {
    transform: translateY(-4px);
    border-color: rgba(73, 116, 253, 0.4);
    box-shadow: 0 0.9rem 1.9rem rgba(22, 32, 58, 0.09);
}

.sol-rel-item h4 {
    font-size: 0.85rem;
    font-weight: 600;
    color: #16203a;
    line-height: 1.55;
    margin: 0 0 0.5rem;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.sol-rel-item p {
    font-size: 0.7rem;
    line-height: 1.75;
    color: #555e6d;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.sol-rel-more {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    margin-top: 0.85rem;
    font-size: 0.7rem;
    color: #3d63e8;
}

.sol-rel-more i {
    font-size: 0.68rem;
    transition: transform 0.2s;
}

.sol-rel-item:hover .sol-rel-more i {
    transform: translateX(0.2rem);
}

/* ============ 底部转化条 ============ */
.sol-cta-wrap {
    padding: 0 0 3.4rem;
    background: #f6f8fd;
}

.sol-cta {
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.6rem;
    padding: 1.75rem 2.3rem;
    background: linear-gradient(120deg, #3d63e8 0%, #4974fd 48%, #6f96ff 100%);
    border-radius: 0.9rem;
    box-shadow: 0 1rem 2.2rem rgba(61, 99, 232, 0.28);
}

.sol-cta::before {
    content: '';
    position: absolute;
    top: -4rem;
    right: 8%;
    width: 12rem;
    height: 12rem;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
}

.sol-cta::after {
    content: '';
    position: absolute;
    bottom: -5rem;
    right: 22%;
    width: 9rem;
    height: 9rem;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.06);
}

.sol-cta-txt {
    position: relative;
    z-index: 1;
}

.sol-cta-txt h3 {
    font-size: 1.12rem;
    font-weight: 700;
    color: #fff;
    margin: 0 0 0.4rem;
}

.sol-cta-txt p {
    font-size: 0.72rem;
    color: rgba(255, 255, 255, 0.85);
    margin: 0;
}

.sol-cta-btn {
    position: relative;
    z-index: 1;
    flex: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.78rem 1.75rem;
    background: #fff;
    border-radius: 999px;
    font-size: 0.98rem;
    font-weight: 700;
    color: #3d63e8;
    box-shadow: 0 0.5rem 1.2rem rgba(7, 15, 44, 0.22);
    transition: transform 0.2s, box-shadow 0.2s;
}

.sol-cta-btn i {
    font-size: 1rem;
}

.sol-cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 0.7rem 1.5rem rgba(7, 15, 44, 0.3);
}

/* ============ 图集灯箱 ============ */
.sol-lightbox {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 10001;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sol-lightbox-mask {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: rgba(4, 8, 24, 0.9);
}

.sol-lightbox-stage {
    position: relative;
    z-index: 1;
    max-width: 86vw;
    margin: 0;
}

.sol-lightbox-stage img {
    display: block;
    max-width: 86vw;
    max-height: 78vh;
    border-radius: 0.4rem;
    box-shadow: 0 1.4rem 3rem rgba(0, 0, 0, 0.5);
}

.sol-lightbox-count {
    margin-top: 0.8rem;
    font-size: 0.72rem;
    text-align: center;
    color: rgba(255, 255, 255, 0.75);
}

.sol-lightbox-prev,
.sol-lightbox-next,
.sol-lightbox-close {
    position: fixed;
    z-index: 2;
    width: 2.6rem;
    height: 2.6rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    line-height: 1;
    color: #fff;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.2s;
}

.sol-lightbox-prev:hover,
.sol-lightbox-next:hover,
.sol-lightbox-close:hover {
    background: #4974fd;
}

.sol-lightbox-prev {
    left: 2rem;
    top: 50%;
    transform: translateY(-50%);
}

.sol-lightbox-next {
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
}

.sol-lightbox-close {
    right: 1.6rem;
    top: 1.4rem;
}

/* ============ 响应式: ≤1200px ============ */
@media (max-width: 1200px) {
    .sol-hero-grid {
        gap: 2rem;
    }

    .sol-pains-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .sol-arch-grid {
        grid-template-columns: 1fr;
        gap: 1.8rem;
    }

    .sol-feat-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .sol-feat-grid > .sol-feat:last-child:nth-child(3n+1) {
        grid-column: auto;
        display: block;
    }

    .sol-feat-grid > .sol-feat:last-child:nth-child(3n+1) .sol-feat-icon {
        margin-bottom: 1rem;
    }

    .sol-adv-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .sol-adv-grid > .sol-adv:last-child:nth-child(3n+1) {
        grid-column: auto;
        display: block;
    }

    .sol-adv-grid > .sol-adv:last-child:nth-child(3n+1) .num {
        margin-bottom: 0.7rem;
    }

    .sol-gallery {
        grid-template-columns: repeat(4, 1fr);
    }

    .sol-related {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ============ 响应式: ≤768px(移动端, 头部50px) ============ */
@media (max-width: 768px) {
    .sol-nav {
        top: 50px;
    }

    .sol-nav-in {
        justify-content: flex-start;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .sol-nav-in::-webkit-scrollbar {
        display: none;
    }

    .sol-nav-in a {
        flex: none;
        padding: 0 0.85rem;
        font-size: 0.72rem;
        line-height: 2.5rem;
    }

    .sol-hero,
    .sol-sec,
    .sol-dark {
        scroll-margin-top: 6rem;
    }

    .sol-hero {
        padding: 2.2rem 0 2.6rem;
    }

    .sol-hero-grid {
        grid-template-columns: 1fr;
        gap: 2.2rem;
    }

    .sol-hero-txt h1 {
        font-size: 1.32rem;
    }

    .sol-lead {
        font-size: 0.75rem;
    }

    .sol-hero-fig::before {
        display: none;
    }

    .sol-stat {
        padding: 0.4rem 0.75rem;
    }

    .sol-stat b {
        font-size: 0.82rem;
    }

    .sol-stat span {
        font-size: 0.58rem;
    }

    .sol-stat-1 {
        top: 0.7rem;
        right: 0.5rem;
    }

    .sol-stat-2 {
        bottom: 0.8rem;
        left: 0.5rem;
    }

    .sol-sec {
        padding: 2.4rem 0;
    }

    .sol-head h2 {
        font-size: 1.22rem;
    }

    .sol-head-desc {
        font-size: 0.72rem;
    }

    .sol-arch-grid {
        gap: 1.6rem;
    }

    .sol-step {
        padding-bottom: 1.15rem;
        gap: 0.8rem;
    }

    .sol-caps {
        gap: 0.5rem;
    }

    .sol-caps span {
        padding: 0.3rem 0.9rem;
        font-size: 0.68rem;
    }

    .sol-principle {
        margin-top: 1.8rem;
    }

    .sol-feat-grid {
        grid-template-columns: 1fr;
        gap: 0.9rem;
    }

    .sol-feat {
        padding: 1.5rem 1.2rem 1.35rem;
    }

    .sol-dark {
        padding: 2.6rem 0;
    }

    .sol-adv-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.9rem;
    }

    .sol-adv {
        padding: 1.25rem 1rem;
    }

    .sol-adv .num {
        font-size: 1.5rem;
        margin-bottom: 0.5rem;
    }

    .sol-gallery {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.55rem;
    }

    .sol-gallery .shot:first-child {
        grid-column: span 2;
        grid-row: span 1;
    }

    .sol-gallery .shot:first-child img {
        aspect-ratio: 16 / 9;
        height: auto;
    }

    /* 尾图同样通栏收尾: 2格+6格+2格=10格, 5行零留白(独占一行, 取消绝对定位由16:9撑高) */
    .sol-gallery .shot:last-child {
        grid-column: span 2;
    }

    .sol-gallery .shot:last-child img {
        position: static;
        aspect-ratio: 16 / 9;
        height: auto;
    }

    .sol-related {
        grid-template-columns: 1fr;
        gap: 0.9rem;
    }

    .sol-cta-wrap {
        padding-bottom: 2.4rem;
    }

    .sol-cta {
        flex-direction: column;
        text-align: center;
        padding: 1.7rem 1.2rem;
    }

    .sol-lightbox-prev {
        left: 0.8rem;
    }

    .sol-lightbox-next {
        right: 0.8rem;
    }
}

/* ============ 响应式: ≤460px(小屏) ============ */
@media (max-width: 460px) {
    .sol-pains-grid {
        grid-template-columns: 1fr;
    }

    .sol-adv-grid {
        grid-template-columns: 1fr;
    }

    .sol-hero-btns .sol-btn {
        padding: 0.55rem 1.3rem;
        font-size: 0.73rem;
    }
}