/* ============================================================
   晶方电气风格官网首页样式表  (仿 www.sevode.com 视觉风格)
   主色调：深蓝(#0a4d8c) + 科技蓝(#1a7fd1) + 白 + 深灰(#2b3238)
   ============================================================ */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    color: #2b3238; background: #fff; min-width: 320px;
    -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
img { display: block; max-width: 100%; }
.container { width: 1200px; max-width: 100%; margin: 0 auto; padding: 0 15px; }

/* ---------- 通用 Section ---------- */
.section { padding: 80px 0; }
.section.gray { background: #f5f7fa; }
.section-head { text-align: center; margin-bottom: 50px; }
.section-head h3 { font-size: 32px; color: #1d2733; font-weight: 700; }
.section-head .en { display: block; font-size: 14px; color: #8a94a0; letter-spacing: 3px; margin-top: 6px; text-transform: uppercase; }
.section-head .line { width: 50px; height: 3px; background: linear-gradient(90deg, #0a4d8c, #1a7fd1); margin: 16px auto 0; border-radius: 2px; }
.section-head .section-desc { color: #6a7480; font-size: 15px; margin-top: 14px; }

/* ---------- 顶栏 ---------- */
.topbar { background: #0a2a4a; color: #b9c0c7; font-size: 12px; line-height: 36px; }
.topbar .container { display: flex; justify-content: space-between; }
.topbar a:hover { color: #fff; }
.topbar .hot { color: #5fb4ff; }

/* ---------- 头部导航 ---------- */
.site-header {
    position: sticky; top: 0; z-index: 100; background: #fff;
    border-bottom: 1px solid #e8ecf1; box-shadow: 0 2px 10px rgba(20, 40, 80, .05);
}
.site-header .container { display: flex; align-items: center; height: 72px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.logo .logo-icon {
    width: 40px; height: 40px; border-radius: 8px; color: #fff; font-size: 20px;
    display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, #0a4d8c, #1a7fd1);
    box-shadow: 0 4px 10px rgba(10, 77, 140, .3);
}
.logo .logo-text { font-size: 21px; letter-spacing: 1px; color: #1d2733; }
.logo .logo-text small { display: block; font-size: 10px; color: #8a94a0; letter-spacing: 2.5px; font-weight: 400; }

.main-nav { margin-left: auto; }
.main-nav > ul { display: flex; }
.main-nav > ul > li { position: relative; }
.main-nav > ul > li > a {
    display: block; padding: 0 22px; line-height: 72px; font-size: 15px;
    color: #333a42; transition: color .2s;
}
.main-nav > ul > li > a:hover, .main-nav > ul > li.on > a { color: #1a7fd1; }
.main-nav > ul > li > a::after {
    content: ''; position: absolute; left: 50%; bottom: 18px; width: 0; height: 3px;
    background: #1a7fd1; border-radius: 2px; transition: all .25s; transform: translateX(-50%);
}
.main-nav > ul > li > a:hover::after, .main-nav > ul > li.on > a::after { width: 24px; }

/* 二级菜单 */
.sub-nav {
    position: absolute; left: 50%; top: 72px; transform: translate(-50%, 12px);
    min-width: 160px; background: #fff; border-radius: 6px; padding: 8px 0;
    box-shadow: 0 10px 30px rgba(15, 40, 80, .15); opacity: 0; visibility: hidden;
    transition: all .25s; border-top: 3px solid #1a7fd1;
}
.main-nav > ul > li:hover .sub-nav { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.sub-nav li a { display: block; padding: 10px 22px; font-size: 13px; color: #4a5563; white-space: nowrap; }
.sub-nav li a:hover { color: #1a7fd1; background: #f2f7fd; }

.nav-toggle { display: none; }

/* ---------- Banner 轮播 ---------- */
.banner { position: relative; height: 560px; overflow: hidden; background: #0a1c33; }
.banner-track { display: flex; height: 100%; transition: transform .7s cubic-bezier(.65, .05, .36, 1); }
.banner-slide { position: relative; flex: 0 0 100%; height: 100%; overflow: hidden; }
.banner-slide img { width: 100%; height: 100%; object-fit: cover; }

/* 视频Banner：PC端播放视频，移动端显示图片 */
.banner-video {
    display: block; width: 100%; height: 100%; object-fit: cover;
    background: #0a1c33;
}
.banner-video-fallback { display: none; width: 100%; height: 100%; object-fit: cover; }
.banner-slide::before {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(90deg, rgba(5, 25, 55, .85) 8%, rgba(5, 25, 55, .4) 55%, transparent);
}
.banner-caption {
    position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
    width: 1200px; max-width: 100%; padding: 0 15px; color: #fff;
}
.banner-caption .tag {
    display: inline-block; padding: 4px 14px; margin-bottom: 18px; font-size: 13px;
    border: 1px solid rgba(255, 255, 255, .5); border-radius: 20px; letter-spacing: 1px;
}
.banner-caption h2 { font-size: 42px; font-weight: 700; line-height: 1.25; margin-bottom: 14px; }
.banner-caption p { font-size: 16px; color: #d5dee9; max-width: 560px; line-height: 1.8; margin-bottom: 30px; }
.banner-caption .btn-more {
    display: inline-block; padding: 12px 38px; font-size: 15px; color: #fff;
    background: linear-gradient(135deg, #1a7fd1, #0a5fc2); border-radius: 4px;
    transition: all .25s; box-shadow: 0 6px 18px rgba(26, 127, 209, .4);
}
.banner-caption .btn-more:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(26, 127, 209, .55); }

.banner-dots { position: absolute; left: 50%; bottom: 26px; transform: translateX(-50%); display: flex; gap: 10px; z-index: 5; }
.banner-dots span {
    width: 34px; height: 4px; border-radius: 2px; background: rgba(255, 255, 255, .35);
    cursor: pointer; transition: all .3s;
}
.banner-dots span.on { background: #fff; width: 46px; }
.banner-arrow {
    position: absolute; top: 50%; transform: translateY(-50%); z-index: 5;
    width: 48px; height: 48px; border: 1px solid rgba(255, 255, 255, .35); border-radius: 50%;
    background: rgba(255, 255, 255, .08); color: #fff; font-size: 26px; cursor: pointer;
    transition: all .25s; line-height: 1;
}
.banner-arrow:hover { background: rgba(255, 255, 255, .2); border-color: #fff; }
.banner-arrow.prev { left: 30px; }
.banner-arrow.next { right: 30px; }

/* ---------- 核心技术优势 ---------- */
.features { background: #fff; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card {
    background: #fff; border: 1px solid #eef1f5; border-radius: 10px; padding: 32px 28px;
    transition: all .3s; position: relative; overflow: hidden;
}
.feature-card::before {
    content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 3px;
    background: linear-gradient(90deg, #0a4d8c, #1a7fd1); transform: scaleX(0); transform-origin: left;
    transition: transform .3s;
}
.feature-card:hover { transform: translateY(-6px); box-shadow: 0 16px 40px rgba(10, 77, 140, .12); border-color: #d6e4f5; }
.feature-card:hover::before { transform: scaleX(1); }
.feature-card .f-icon {
    width: 52px; height: 52px; border-radius: 12px; font-size: 26px;
    display: flex; align-items: center; justify-content: center; margin-bottom: 18px;
    background: linear-gradient(135deg, #eaf3fc, #d6e8f8); color: #1a7fd1;
}
.feature-card h4 { font-size: 17px; color: #1d2733; margin-bottom: 10px; }
.feature-card p { font-size: 14px; color: #6a7480; line-height: 1.7; }

/* ---------- 产品中心 ---------- */
.product-showcase { display: flex; flex-direction: column; gap: 50px; }
.product-item {
    display: flex; align-items: center; gap: 50px; background: #fff;
    border-radius: 14px; overflow: hidden; box-shadow: 0 8px 30px rgba(15, 40, 80, .08);
}
.product-item.reverse { flex-direction: row-reverse; }
.product-item .p-img { flex: 0 0 48%; overflow: hidden; }
.product-item .p-img img { width: 100%; height: 320px; object-fit: cover; transition: transform .5s; }
.product-item:hover .p-img img { transform: scale(1.05); }
.product-item .p-body { flex: 1; padding: 30px 40px 30px 0; position: relative; }
.product-item.reverse .p-body { padding: 30px 0 30px 40px; }
.product-item .p-tag {
    position: absolute; top: 0; left: 0; font-size: 60px; font-weight: 800;
    color: #eaf3fc; line-height: 1; letter-spacing: -2px; pointer-events: none;
}
.product-item.reverse .p-tag { left: 40px; }
.product-item .p-body h4 {
    font-size: 24px; color: #1d2733; margin-bottom: 12px; position: relative; z-index: 1;
}
.product-item .p-body p {
    font-size: 14px; color: #5a6470; line-height: 1.8; margin-bottom: 18px; position: relative; z-index: 1;
}
.product-item .p-feats { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 20px; position: relative; z-index: 1; }
.product-item .p-feats li {
    font-size: 13px; color: #4a5563; padding-left: 18px; position: relative; line-height: 1.8;
}
.product-item .p-feats li::before {
    content: ''; position: absolute; left: 0; top: 9px; width: 6px; height: 6px;
    background: #1a7fd1; border-radius: 50%;
}

/* ---------- 产品中心 V2（特性网格+标注大图） ---------- */
.p-tabs { display: flex; justify-content: center; gap: 12px; margin-bottom: 40px; flex-wrap: wrap; }
.p-tabs button {
    padding: 10px 36px; font-size: 15px; border: 2px solid #dce3ec; border-radius: 28px;
    background: #fff; color: #5a6470; cursor: pointer; transition: all .25s;
}
.p-tabs button.on {
    color: #fff; background: linear-gradient(135deg, #0a4d8c, #1a7fd1);
    border-color: #1a7fd1; box-shadow: 0 6px 18px rgba(26, 127, 209, .3);
}
.p-tabs button:hover:not(.on) { border-color: #1a7fd1; color: #1a7fd1; }

.p-panel { display: none; }
.p-panel.on { display: block; }

.p-showcase { text-align: center; }
.ps-name { font-size: 28px; color: #1d2733; margin-bottom: 10px; font-weight: 700; }
.ps-desc { font-size: 15px; color: #6a7480; line-height: 1.8; margin: 0 auto 40px; max-width: 700px; }

.ps-features {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
    margin-bottom: 40px; text-align: left;
}
.ps-feat { display: flex; gap: 14px; align-items: flex-start; }
.ps-num {
    flex: 0 0 36px; width: 36px; height: 36px; border-radius: 50%;
    background: linear-gradient(135deg, #0a4d8c, #1a7fd1); color: #fff;
    font-size: 16px; font-weight: 700; display: flex; align-items: center;
    justify-content: center; box-shadow: 0 4px 12px rgba(10, 77, 140, .25);
}
.ps-feat-body h5 { font-size: 15px; color: #1d2733; margin-bottom: 4px; font-weight: 600; }
.ps-feat-body p { font-size: 13px; color: #7d8894; line-height: 1.6; }

.ps-image { position: relative; border-radius: 12px; overflow: hidden; box-shadow: 0 12px 40px rgba(15, 40, 80, .12); }
.ps-image img { width: 100%; max-height: 420px; object-fit: cover; }
.ps-marker {
    position: absolute; width: 34px; height: 34px; border-radius: 50%;
    background: linear-gradient(135deg, #0a4d8c, #1a7fd1); color: #fff;
    font-size: 14px; font-weight: 700; display: flex; align-items: center;
    justify-content: center; box-shadow: 0 4px 14px rgba(10, 77, 140, .4);
    border: 2px solid #fff; transition: transform .25s; z-index: 2;
}
.ps-marker:hover { transform: scale(1.15); }

@media (max-width: 992px) {
    .ps-features { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .ps-features { grid-template-columns: 1fr; gap: 16px; }
    .ps-name { font-size: 22px; }
    .ps-desc { font-size: 14px; margin-bottom: 28px; }
    .ps-image img { max-height: 280px; }
    .ps-marker { width: 28px; height: 28px; font-size: 12px; }
    .p-tabs { flex-wrap: nowrap; gap: 6px; }
    .p-tabs button { flex: 1; min-width: 0; padding: 8px 4px; font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
}

/* ---------- 关于我们 ---------- */
.about { background: #fff; }
.about-inner { display: flex; align-items: center; gap: 50px; }
.about-text { flex: 1; }
.about-text .slogan { font-size: 13px; color: #1a7fd1; letter-spacing: 2px; font-weight: 600; }
.about-text h3 { font-size: 30px; color: #1d2733; margin: 12px 0 20px; line-height: 1.4; }
.about-text h3 em { font-style: normal; color: #1a7fd1; }
.about-text p { font-size: 14px; color: #5a6470; line-height: 1.9; margin-bottom: 14px; }
.about-stats { display: flex; gap: 40px; margin-top: 30px; }
.about-stats .stat b {
    font-size: 42px; font-weight: 800; color: #0a4d8c; line-height: 1;
    background: linear-gradient(135deg, #0a4d8c, #1a7fd1); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.about-stats .stat b small { font-size: 20px; margin-left: 2px; }
.about-stats .stat span { display: block; font-size: 13px; color: #8a94a0; margin-top: 6px; }
.about-img { flex: 0 0 46%; }
.about-img img { border-radius: 12px; box-shadow: 0 16px 48px rgba(10, 77, 140, .18); }

/* ---------- 应用案例 ---------- */
.case-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.case-card {
    position: relative; border-radius: 10px; overflow: hidden; aspect-ratio: 1;
    box-shadow: 0 6px 20px rgba(15, 40, 80, .1); transition: all .3s;
}
.case-card img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.case-card .c-mask {
    position: absolute; inset: 0; display: flex; align-items: flex-end;
    background: linear-gradient(to top, rgba(5, 25, 55, .85), transparent 55%);
    padding: 18px; transition: all .3s;
}
.case-card .c-mask h4 { color: #fff; font-size: 16px; }
.case-card:hover { transform: translateY(-6px); box-shadow: 0 14px 36px rgba(10, 77, 140, .22); }
.case-card:hover img { transform: scale(1.08); }
.case-card:hover .c-mask { background: linear-gradient(to top, rgba(10, 77, 140, .92), rgba(10, 77, 140, .3) 60%); }

/* ---------- 新闻资讯 ---------- */
.news-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.news-feature {
    position: relative; border-radius: 12px; overflow: hidden; height: 100%; min-height: 320px;
    box-shadow: 0 8px 30px rgba(15, 40, 80, .1);
}
.news-feature img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.news-feature:hover img { transform: scale(1.05); }
.news-feature .n-mask {
    position: absolute; left: 0; right: 0; bottom: 0; padding: 24px;
    background: linear-gradient(to top, rgba(5, 25, 55, .9), transparent);
}
.news-feature .n-date { color: #7fb2e8; font-size: 13px; margin-bottom: 8px; }
.news-feature .n-mask h4 { color: #fff; font-size: 19px; line-height: 1.5; }
.news-list { display: flex; flex-direction: column; gap: 16px; }
.news-item {
    display: flex; gap: 18px; padding: 18px; background: #fff;
    border-radius: 10px; border: 1px solid #eef1f5; transition: all .3s;
}
.news-item:hover { box-shadow: 0 8px 24px rgba(15, 40, 80, .08); transform: translateX(4px); border-color: #d6e4f5; }
.news-item .n-day {
    flex: 0 0 62px; text-align: center; border-right: 1px solid #eef1f5; padding-right: 16px;
}
.news-item .n-day b { display: block; font-size: 28px; color: #0a4d8c; line-height: 1; }
.news-item .n-day span { font-size: 12px; color: #8a94a0; }
.news-item h4 { font-size: 15px; color: #1d2733; margin-bottom: 6px; line-height: 1.5; }
.news-item p { font-size: 13px; color: #6a7480; line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ---------- 页脚 ---------- */
.site-footer { background: #0a2a4a; color: #b9c0c7; padding-top: 60px; }
.footer-main { display: flex; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255, 255, 255, .08); }
.footer-brand { flex: 0 0 280px; }
.footer-brand .logo-text { font-size: 22px; color: #fff; font-weight: 700; }
.footer-brand .logo-text small { display: block; font-size: 11px; color: #7fb2e8; letter-spacing: 2px; font-weight: 400; margin-top: 2px; }
.footer-brand p { font-size: 13px; line-height: 1.8; margin: 16px 0; color: #8a94a0; }
.footer-brand .hotline { font-size: 13px; color: #8a94a0; }
.footer-brand .hotline b { display: block; font-size: 22px; color: #5fb4ff; margin-top: 4px; letter-spacing: 1px; }
.footer-cols { flex: 1; display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.footer-col h5 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.footer-col li { margin-bottom: 10px; }
.footer-col li a { font-size: 13px; color: #8a94a0; transition: color .2s; }
.footer-col li a:hover { color: #5fb4ff; }
.footer-qr { flex: 0 0 130px; text-align: center; }
.footer-qr .qr-box {
    width: 110px; height: 110px; margin: 0 auto 10px; background: #fff; border-radius: 8px;
    display: flex; align-items: center; justify-content: center; font-size: 12px; color: #8a94a0;
}
.footer-qr span { font-size: 12px; color: #8a94a0; }
.footer-qr .contact-email { font-size: 12px; color: #5fb4ff; margin-top: 10px; }
.footer-bottom { display: flex; justify-content: space-between; padding: 20px 0; font-size: 12px; color: #6a7480; }
.footer-bottom a:hover { color: #5fb4ff; }

/* ---------- 返回顶部 ---------- */
.back-top {
    position: fixed; right: 30px; bottom: 30px; width: 46px; height: 46px;
    background: #1a7fd1; color: #fff; border: none; border-radius: 50%; font-size: 20px;
    cursor: pointer; opacity: 0; visibility: hidden; transform: translateY(20px);
    transition: all .3s; z-index: 99; box-shadow: 0 6px 20px rgba(26, 127, 209, .4);
}
.back-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { background: #0a5fc2; }

/* ---------- 进场动画 ---------- */
.fade-up { opacity: 0; transform: translateY(30px); transition: all .7s cubic-bezier(.25, .46, .45, .94); }
.fade-up.in { opacity: 1; transform: translateY(0); }

/* ---------- 响应式 ---------- */
@media (max-width: 992px) {
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
    .case-grid { grid-template-columns: repeat(3, 1fr); }
    .about-inner { flex-direction: column; }
    .about-img { width: 100%; }
    .product-item, .product-item.reverse { flex-direction: column; }
    .product-item .p-img, .product-item.reverse .p-img { flex: none; width: 100%; }
    .product-item .p-body, .product-item.reverse .p-body { padding: 24px; }
    .footer-main { flex-direction: column; }
    .footer-cols { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .section { padding: 50px 0; }
    .section-head h3 { font-size: 24px; }
    .topbar .container { flex-direction: column; text-align: center; line-height: 24px; padding: 6px 15px; }
    .nav-toggle {
        display: flex; flex-direction: column; gap: 5px; background: none; border: none;
        cursor: pointer; padding: 8px; margin-left: auto;
    }
    .nav-toggle span { width: 24px; height: 2px; background: #1d2733; transition: all .3s; }
    .nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .nav-toggle.open span:nth-child(2) { opacity: 0; }
    .nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
    .main-nav {
        position: absolute; top: 72px; left: 0; right: 0; background: #fff;
        box-shadow: 0 10px 30px rgba(15, 40, 80, .1); max-height: 0; overflow: hidden;
        transition: max-height .35s;
    }
    .main-nav.open { max-height: 1200px; overflow-y: auto; }
    .main-nav > ul { flex-direction: column; }
    .main-nav > ul > li > a { line-height: 50px; padding: 0 24px; border-bottom: 1px solid #f0f3f7; }
    .main-nav > ul > li > a::after { display: none; }
    .main-nav > ul > li .sub-nav {
        position: static !important; transform: none !important;
        opacity: 1 !important; visibility: visible !important;
        box-shadow: none; border-top: none; border-radius: 0; min-width: 0;
        background: #f8fafc; padding: 0;
        max-height: 0; overflow: hidden; transition: max-height .3s;
    }
    .main-nav > ul > li.expanded .sub-nav { max-height: 400px; }
    .main-nav > ul > li .sub-nav li a {
        padding: 0 24px 0 44px; line-height: 44px; font-size: 13px;
        color: #4a5563 !important; border-bottom: 1px solid #eef1f5; white-space: normal;
        visibility: visible !important; opacity: 1 !important;
    }
    .banner { height: 420px; }
    .banner-video { display: none; }
    .banner-video-fallback { display: block; }
    .banner-caption h2 { font-size: 28px; }
    .banner-caption p { font-size: 14px; }
    .banner-arrow.prev { left: 10px; }
    .banner-arrow.next { right: 10px; }
    .feature-grid { grid-template-columns: 1fr; }
    .case-grid { grid-template-columns: repeat(2, 1fr); }
    .news-grid { grid-template-columns: 1fr; }
    .about-stats { gap: 24px; }
    .about-stats .stat b { font-size: 32px; }
    .product-item .p-feats { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; text-align: center; gap: 8px; }
}

/* ============================================================
   子页面样式：横幅 / 面包屑 / 列表 / 详情文章
   ============================================================ */
.page-banner {
    height: 280px; background-size: cover; background-position: center;
    display: flex; align-items: center;
}
.pb-inner h2 { font-size: 38px; color: #fff; letter-spacing: 2px; }
.pb-inner span {
    display: block; margin-top: 8px; font-size: 13px; letter-spacing: 5px;
    color: rgba(255, 255, 255, .75); text-transform: uppercase;
}

.breadcrumb { padding: 0 0 22px; font-size: 13px; color: #8a94a0; }
.breadcrumb a { color: #8a94a0; }
.breadcrumb a:hover { color: #1a7fd1; }
.breadcrumb .sep { margin: 0 8px; color: #c3cad2; }
.breadcrumb .cur { color: #333a42; }

.empty-tip { padding: 60px 0; text-align: center; color: #8a94a0; font-size: 15px; grid-column: 1 / -1; }
.empty-tip a { color: #1a7fd1; }

/* 产品列表页：Tab + Grid */
.product-tabs { display: flex; gap: 12px; margin-bottom: 36px; flex-wrap: wrap; }
.product-tabs button {
    padding: 10px 28px; font-size: 14px; border: 1px solid #dce3ec; border-radius: 24px;
    background: #fff; color: #5a6470; cursor: pointer; transition: all .25s;
}
.product-tabs button.on { color: #fff; background: linear-gradient(135deg, #0a4d8c, #1a7fd1); border-color: #1a7fd1; }
.product-tabs button:hover:not(.on) { border-color: #1a7fd1; color: #1a7fd1; }

.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.product-card {
    background: #fff; border: 1px solid #edf1f6; border-radius: 10px; overflow: hidden;
    transition: all .3s;
}
.product-card:hover { transform: translateY(-6px); box-shadow: 0 16px 40px rgba(10, 77, 140, .12); border-color: #d6e4f5; }
.product-card .p-img { overflow: hidden; }
.product-card .p-img img { width: 100%; height: 200px; object-fit: cover; transition: transform .5s; }
.product-card:hover .p-img img { transform: scale(1.06); }
.product-card .p-body { padding: 20px 22px 24px; }
.product-card .p-body h4 { font-size: 16px; color: #1d2733; margin-bottom: 8px; }
.product-card .p-body p { font-size: 13px; color: #6a7480; line-height: 1.7; margin-bottom: 14px;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.product-card .p-link { font-size: 13px; color: #1a7fd1; font-weight: 600; }
.product-card:hover .p-link { color: #0a5fc2; }

/* 解决方案列表页 */
.solution-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.solution-card {
    position: relative; border-radius: 10px; overflow: hidden; aspect-ratio: 1;
    box-shadow: 0 6px 20px rgba(15, 40, 80, .1); transition: all .3s;
}
.solution-card img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.solution-card .s-mask {
    position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: flex-end;
    background: linear-gradient(to top, rgba(5, 25, 55, .85), transparent 55%);
    padding: 18px; transition: all .3s;
}
.solution-card .s-mask h4 { color: #fff; font-size: 16px; margin-bottom: 4px; }
.solution-card .s-mask p { color: rgba(255, 255, 255, .8); font-size: 12px; line-height: 1.6;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.solution-card:hover { transform: translateY(-6px); box-shadow: 0 14px 36px rgba(10, 77, 140, .22); }
.solution-card:hover img { transform: scale(1.08); }
.solution-card:hover .s-mask { background: linear-gradient(to top, rgba(10, 77, 140, .92), rgba(10, 77, 140, .3) 60%); }

/* 产品详情：左图右信息 */
.detail-hero { display: flex; gap: 50px; margin-bottom: 60px; align-items: stretch; }
.detail-hero .d-img {
    flex: 0 0 460px; border-radius: 10px; overflow: hidden; background: #eef2f7;
    border: 1px solid #edf1f6; box-shadow: 0 14px 34px rgba(15, 40, 80, .1);
}
.detail-hero .d-img img { width: 100%; height: 100%; object-fit: cover; }
.detail-hero .d-info { flex: 1; padding-top: 6px; }
.d-cat {
    display: inline-block; padding: 4px 14px; margin-bottom: 14px; font-size: 12.5px;
    color: #1a7fd1; background: #eaf3fc; border-radius: 20px; letter-spacing: 1px;
}
.d-info h2 { font-size: 30px; color: #1d2733; margin-bottom: 14px; }
.d-desc { font-size: 15px; color: #5b6672; line-height: 1.9; margin-bottom: 22px; }
.feat-list li {
    position: relative; padding: 9px 0 9px 26px; font-size: 14px; color: #3c4650;
    border-bottom: 1px dashed #e8ecf1;
}
.feat-list li::before {
    content: ''; position: absolute; left: 2px; top: 15px; width: 12px; height: 7px;
    border-left: 2px solid #1a7fd1; border-bottom: 2px solid #1a7fd1; transform: rotate(-45deg);
}

/* 文章排版（详情正文） */
.article { max-width: 900px; margin: 0 auto; }
.article h2 { font-size: 28px; color: #1d2733; margin-bottom: 14px; line-height: 1.4; }
.article h3 {
    font-size: 19px; color: #1d2733; margin: 36px 0 14px; padding-left: 14px;
    border-left: 4px solid #1a7fd1; line-height: 1.3;
}
.article p { font-size: 15px; color: #4a5563; line-height: 2; margin-bottom: 16px; text-indent: 2em; }
.article-meta { display: flex; gap: 16px; align-items: center; margin-bottom: 26px; color: #9aa6b2; font-size: 13px; }
.d-banner { margin: 0 0 30px; border-radius: 10px; overflow: hidden; box-shadow: 0 12px 30px rgba(15, 40, 80, .1); }
.d-banner img { width: 100%; max-height: 440px; object-fit: cover; }
.spec-table { width: 100%; border-collapse: collapse; margin-top: 6px; }
.spec-table th, .spec-table td { padding: 12px 18px; font-size: 14px; border: 1px solid #e8ecf1; text-align: left; }
.spec-table th { width: 220px; background: #f5f8fc; color: #333a42; font-weight: 600; }
.spec-table td { color: #4a5563; }
.article-nav {
    display: flex; justify-content: space-between; gap: 20px; margin-top: 50px;
    padding-top: 22px; border-top: 1px solid #e8ecf1; font-size: 13.5px;
}
.article-nav a { color: #5b6672; max-width: 46%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.article-nav a:hover { color: #1a7fd1; }

/* 新闻列表页 */
.news-rows { display: flex; flex-direction: column; gap: 22px; }
.news-row {
    display: flex; gap: 26px; padding: 22px; background: #fff;
    border: 1px solid #edf1f6; border-radius: 10px; transition: all .3s; align-items: center;
}
.news-row:hover { transform: translateY(-4px); box-shadow: 0 14px 30px rgba(15, 40, 80, .1); border-color: #d6e4f5; }
.news-row .nr-img { flex: 0 0 260px; height: 165px; border-radius: 8px; overflow: hidden; }
.news-row .nr-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.news-row:hover .nr-img img { transform: scale(1.06); }
.news-row .nr-body { flex: 1; min-width: 0; }
.nr-cat {
    display: inline-block; padding: 2px 12px; margin-bottom: 10px; font-size: 12px;
    color: #1a7fd1; background: #eaf3fc; border-radius: 12px;
}
.news-row h4 {
    font-size: 18px; color: #1d2733; margin-bottom: 10px; font-weight: 600;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.news-row p {
    font-size: 13.5px; color: #7d8894; line-height: 1.8; margin-bottom: 12px;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.nr-date { font-size: 12.5px; color: #9aa6b2; }

/* 关于我们列表页 */
.about-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.about-card {
    display: flex; background: #fff; border: 1px solid #edf1f6; border-radius: 10px;
    overflow: hidden; transition: all .3s;
}
.about-card:hover { transform: translateY(-6px); box-shadow: 0 16px 36px rgba(10, 77, 140, .12); }
.about-card .ab-img { flex: 0 0 220px; overflow: hidden; }
.about-card .ab-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.about-card:hover .ab-img img { transform: scale(1.08); }
.about-card .ab-body { flex: 1; padding: 26px 26px 22px; min-width: 0; }
.about-card .en { font-size: 11px; letter-spacing: 3px; color: #9aa6b2; text-transform: uppercase; }
.about-card h4 { font-size: 19px; color: #1d2733; margin: 8px 0 10px; }
.about-card p {
    font-size: 13px; color: #7d8894; line-height: 1.8; margin-bottom: 14px;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}

/* ---------- 联系我们 ---------- */
.contact-layout { display: grid; grid-template-columns: 480px 1fr; gap: 40px; align-items: stretch; }
.contact-info { display: flex; flex-direction: column; gap: 16px; }
.contact-info .contact-card { flex: 1 1 0; display: flex; flex-direction: column; justify-content: center; }
.contact-card {
    background: #fff; border: 1px solid #eef1f5; border-left: 3px solid #1a7fd1;
    border-radius: 8px; padding: 20px 24px; transition: all .3s;
}
.contact-card:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(10, 77, 140, .1); border-color: #d6e4f5; }
.contact-card h5 { font-size: 16px; color: #1d2733; margin-bottom: 8px; }
.contact-card p { font-size: 15px; color: #5a6470; line-height: 1.8; }
.contact-card a { color: #1a7fd1; }
.contact-card a:hover { text-decoration: underline; }

.contact-form { background: #fff; border-radius: 12px; padding: 34px 36px; box-shadow: 0 8px 30px rgba(15, 40, 80, .08); display: flex; flex-direction: column; }
.contact-form form { flex: 1; display: flex; flex-direction: column; }
.contact-form form > .form-group { flex: 1; display: flex; flex-direction: column; }
.contact-form form > .form-group textarea { flex: 1; }
.contact-form h4 { font-size: 22px; color: #1d2733; margin-bottom: 6px; }
.contact-form .cf-sub { font-size: 13px; color: #8a94a0; margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; color: #4a5563; margin-bottom: 6px; }
.form-group input, .form-group textarea {
    width: 100%; padding: 11px 14px; font-size: 14px; font-family: inherit; color: #2b3238;
    border: 1px solid #dce3ec; border-radius: 6px; background: #fbfcfe; transition: all .2s;
}
.form-group input:focus, .form-group textarea:focus {
    outline: none; border-color: #1a7fd1; background: #fff; box-shadow: 0 0 0 3px rgba(26, 127, 209, .12);
}
.form-group textarea { min-height: 120px; resize: vertical; }
.btn-submit {
    display: inline-block; padding: 12px 44px; font-size: 15px; color: #fff; border: none; border-radius: 4px;
    background: linear-gradient(135deg, #1a7fd1, #0a5fc2); cursor: pointer; transition: all .25s;
    box-shadow: 0 6px 18px rgba(26, 127, 209, .35);
}
.btn-submit:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(26, 127, 209, .5); }
.form-tip {
    display: none; margin-top: 16px; padding: 12px 16px; font-size: 14px; line-height: 1.6;
    color: #0a7a3d; background: #eafaf0; border: 1px solid #bfe8cf; border-radius: 6px;
}
.form-tip.show { display: block; }

.map-sec { margin-top: 60px; }
.map-box {
    height: 340px; border-radius: 12px; border: 1px solid #dce8f5;
    background: linear-gradient(135deg, #eaf2fb, #dbebfa);
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    text-align: center; color: #0a4d8c;
}
.map-box h5 { font-size: 18px; margin-bottom: 8px; }
.map-box p { font-size: 14px; color: #5a6470; }

/* ---------- 下载中心 ---------- */
.dl-note {
    background: #fffdf4; border: 1px dashed #f0d9a0; border-radius: 8px;
    padding: 12px 18px; margin-bottom: 22px; font-size: 13px; color: #8a6d3b; line-height: 1.8;
}
.dl-note a { color: #1a7fd1; }
.dl-list { display: flex; flex-direction: column; gap: 12px; }
.dl-item {
    display: flex; align-items: center; gap: 18px; background: #fff;
    border: 1px solid #eef1f5; border-radius: 10px; padding: 18px 22px; transition: all .25s;
}
.dl-item:hover { transform: translateY(-2px); border-color: #d6e4f5; box-shadow: 0 12px 30px rgba(10, 77, 140, .08); }
.dl-file {
    flex: 0 0 56px; height: 56px; border-radius: 8px; color: #fff;
    font-size: 13px; font-weight: 700; letter-spacing: 1px;
    display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, #0a4d8c, #1a7fd1);
}
.dl-file.zip { background: linear-gradient(135deg, #0a7a3d, #12a35a); }
.dl-info { flex: 1; min-width: 0; }
.dl-info h4 { font-size: 15px; color: #1d2733; }
.dl-info p { font-size: 13px; color: #6a7480; line-height: 1.7; margin-top: 4px; }
.dl-meta { display: block; margin-top: 6px; font-size: 12px; color: #9aa6b2; }
.dl-btn {
    flex: 0 0 auto; padding: 9px 24px; font-size: 13px; color: #1a7fd1;
    border: 1px solid #bcd8f2; border-radius: 20px; background: #f5faff; transition: all .25s;
}
.dl-btn:hover { color: #fff; background: #1a7fd1; border-color: #1a7fd1; }
.dl-tip {
    display: none; margin-top: 20px; padding: 12px 18px; font-size: 14px; line-height: 1.7;
    color: #0a4d8c; background: #eef6ff; border: 1px solid #cfe3fa; border-radius: 8px;
}
.dl-tip.show { display: block; }
.dl-tip a { color: #1a7fd1; text-decoration: underline; }

@media (max-width: 768px) {
    .dl-item { flex-wrap: wrap; padding: 16px; gap: 14px; }
    .dl-info { flex: 1 1 calc(100% - 70px); }
    .dl-btn { flex: 1 1 100%; text-align: center; margin-top: 4px; }
    .dl-info p { font-size: 12px; }
    .product-tabs { flex-wrap: nowrap; overflow-x: auto; -webkit-overflow-scrolling: touch; }
    .product-tabs button { flex: 0 0 auto; white-space: nowrap; }
}

/* 子页面响应式 */
@media (max-width: 992px) {
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .solution-grid { grid-template-columns: repeat(3, 1fr); }
    .about-grid { grid-template-columns: 1fr; }
    .detail-hero { flex-direction: column; gap: 26px; }
    .detail-hero .d-img { flex: none; height: 320px; }
    .contact-layout { grid-template-columns: 1fr; gap: 30px; }
}
@media (max-width: 768px) {
    .page-banner { height: 180px; }
    .pb-inner h2 { font-size: 26px; }
    .product-grid { grid-template-columns: 1fr; }
    .solution-grid { grid-template-columns: repeat(2, 1fr); }
    .news-row { flex-direction: column; align-items: stretch; gap: 16px; }
    .news-row .nr-img { flex: none; width: 100%; height: 180px; }
    .article h2 { font-size: 22px; }
    .article p { text-indent: 0; }
    .spec-table th { width: 130px; }
    .article-nav { flex-direction: column; gap: 10px; }
    .article-nav a { max-width: 100%; }
    .about-card { flex-direction: column; }
    .about-card .ab-img { flex: none; height: 180px; }
    .contact-form { padding: 24px 20px; }
    .form-row { grid-template-columns: 1fr; gap: 0; }
    .map-box { height: 240px; }
}