/* ============================================================
   瀚勤科技中文官网 — 全站样式
   品牌色：深蓝 #0B3D6E / 强调橙 #E87722
   ============================================================ */
:root {
    --brand: #0B3D6E;
    --brand-dark: #082C4F;
    --accent: #E87722;
    --text: #1B2733;
    --text-2: #55636F;
    --bg-alt: #F5F7FA;
    --border: #E3E8EE;
    --radius: 8px;
    --shadow: 0 2px 12px rgba(11, 61, 110, .08);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", Arial, sans-serif;
    color: var(--text);
    line-height: 1.7;
    background: #fff;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.center { text-align: center; margin-top: 40px; }
.muted { color: var(--text-2); font-size: .9rem; }

/* ---------- 顶栏 ---------- */
.site-header {
    position: sticky; top: 0; z-index: 100;
    background: #fff; box-shadow: var(--shadow);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand img { height: 44px; width: auto; }
.brand-name { font-size: 1.15rem; font-weight: 700; color: var(--brand); }
.site-nav { display: flex; align-items: center; gap: 4px; }
.site-nav > a, .nav-item > a {
    padding: 8px 16px; font-size: 1rem; color: var(--text);
    border-radius: 6px; transition: .2s;
}
.site-nav > a:hover, .site-nav > a.active, .nav-item > a.active {
    color: var(--brand); background: var(--bg-alt); font-weight: 600;
}
.nav-item { position: relative; }
.sub-nav {
    display: none; position: absolute; top: 100%; left: 0;
    min-width: 160px; background: #fff; box-shadow: var(--shadow);
    border-radius: var(--radius); overflow: hidden; z-index: 50;
}
.nav-item:hover .sub-nav { display: block; }
.sub-nav a { display: block; padding: 10px 18px; font-size: .95rem; }
.sub-nav a:hover { background: var(--bg-alt); color: var(--brand); }
.nav-toggle { display: none; background: none; border: 1px solid var(--border); font-size: 1.4rem; padding: 4px 12px; border-radius: 6px; cursor: pointer; }

/* ---------- 首页 Banner ---------- */
.banner { position: relative; height: 520px; overflow: hidden; background: var(--brand-dark); }
.banner-slide {
    position: absolute; inset: 0; opacity: 0; transition: opacity .8s;
    background-size: cover; background-position: center;
    display: flex; align-items: center;
}
.banner-slide.active { opacity: 1; }
.banner-text { color: #fff; text-shadow: 0 2px 12px rgba(0,0,0,.45); }
.banner-text h1 { font-size: 3rem; margin-bottom: 12px; }
.banner-text p { font-size: 1.25rem; margin-bottom: 28px; }
.banner-arrow {
    position: absolute; top: 50%; transform: translateY(-50%);
    background: rgba(255,255,255,.25); color: #fff; border: none;
    font-size: 2.2rem; width: 48px; height: 48px; border-radius: 50%;
    cursor: pointer; z-index: 5;
}
.banner-arrow:hover { background: rgba(255,255,255,.45); }
.banner-arrow.prev { left: 20px; }
.banner-arrow.next { right: 20px; }
.banner-dots { position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%); display: flex; gap: 10px; z-index: 5; }
.banner-dots span { width: 10px; height: 10px; border-radius: 50%; background: rgba(255,255,255,.5); cursor: pointer; }
.banner-dots span.on { background: #fff; }

/* ---------- 按钮 ---------- */
.btn {
    display: inline-block; padding: 10px 28px; border-radius: 6px;
    font-size: 1rem; cursor: pointer; border: 1px solid transparent; transition: .2s;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #d0681a; }
.btn-outline { border-color: var(--brand); color: var(--brand); background: transparent; }
.btn-outline:hover { background: var(--brand); color: #fff; }
.btn-block { width: 100%; }
.btn-sm { padding: 4px 12px; font-size: .85rem; }
.btn-danger { background: #c0392b; color: #fff; }

/* ---------- 通用区块 ---------- */
.section { padding: 72px 0; }
.section-alt { background: var(--bg-alt); }
.section-head { text-align: center; margin-bottom: 44px; }
.section-head h2 { font-size: 2rem; color: var(--brand); }
.section-head p { color: var(--text-2); margin-top: 6px; }
.section-head.light h2, .section-head.light p { color: #fff; }

.four-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.two-col { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; align-items: center; }
.value-item {
    background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
    padding: 28px 22px; text-align: center; transition: .2s;
}
.value-item:hover { box-shadow: var(--shadow); transform: translateY(-3px); }
.value-item h3 { color: var(--brand); margin-bottom: 10px; font-size: 1.15rem; }
.value-item p { color: var(--text-2); font-size: .92rem; }

/* ---------- 产品卡片 ---------- */
.card-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.product-card {
    background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
    overflow: hidden; transition: .2s; display: flex; flex-direction: column;
}
.product-card:hover { box-shadow: var(--shadow); transform: translateY(-3px); }
.card-img { height: 200px; background: #fff; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.card-img img { width: 100%; height: 100%; object-fit: contain; padding: 12px; }
.img-placeholder {
    color: var(--brand); font-size: 1.05rem; background: var(--bg-alt);
    width: 100%; height: 100%; display: flex; align-items: center; justify-content: center;
}
.product-card h3 { font-size: 1.02rem; padding: 14px 16px 4px; color: var(--text); }
.product-card p { font-size: .88rem; color: var(--text-2); padding: 0 16px 16px; }

/* ---------- 解决方案 ---------- */
.icon-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.solution-item { text-align: center; transition: .2s; }
.solution-item img {
    height: 170px; width: 100%; object-fit: cover; border-radius: var(--radius);
}
.solution-item span { display: block; margin-top: 12px; font-size: 1.1rem; font-weight: 600; color: var(--brand); }
.solution-item:hover { transform: translateY(-3px); }
.solution-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.solution-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: .2s; }
.solution-card:hover { box-shadow: var(--shadow); transform: translateY(-3px); }
.solution-card .card-img { height: 220px; }
.solution-card .card-img img { object-fit: cover; }
.solution-card h3 { padding: 16px 16px 4px; color: var(--brand); }
.solution-card p { padding: 0 16px 16px; font-size: .9rem; color: var(--text-2); }
.solution-hero img { border-radius: var(--radius); max-height: 420px; object-fit: cover; width: 100%; }
.solution-body { margin-top: 36px; }

/* ---------- 优势（深色带） ---------- */
.advantages { background: linear-gradient(135deg, var(--brand-dark), var(--brand)); }
.advantages .adv-item { text-align: center; color: #fff; }
.adv-num { font-size: 2.4rem; font-weight: 800; color: rgba(255,255,255,.35); }
.adv-item h3 { margin: 8px 0; font-size: 1.15rem; }
.adv-item p { font-size: .9rem; color: rgba(255,255,255,.8); }

/* ---------- 案例 ---------- */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card {
    background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
    overflow: hidden; transition: .2s;
}
.case-card:hover { box-shadow: var(--shadow); transform: translateY(-3px); }
.case-card .card-img { height: 200px; }
.case-card .card-img img { object-fit: cover; }
.case-body { padding: 14px 16px 18px; }
.tag {
    display: inline-block; background: rgba(232,119,34,.12); color: var(--accent);
    font-size: .8rem; padding: 2px 10px; border-radius: 99px; margin-bottom: 8px;
}
.case-body h3 { font-size: 1.02rem; }
.case-img { border-radius: var(--radius); margin: 20px 0; max-width: 720px; }

/* ---------- 新闻 ---------- */
.news-list { display: flex; flex-direction: column; gap: 2px; }
.news-item {
    display: flex; gap: 20px; align-items: baseline; padding: 16px 12px;
    border-bottom: 1px solid var(--border); transition: .2s; border-radius: 6px;
}
.news-item:hover { background: var(--bg-alt); }
.news-item time { color: var(--accent); font-size: .9rem; white-space: nowrap; }
.news-item span { font-size: 1.02rem; }
.news-detail time { display: block; margin-bottom: 24px; }

/* ---------- 时间线 ---------- */
.timeline { position: relative; padding-left: 24px; border-left: 2px solid var(--brand); display: flex; flex-direction: column; gap: 22px; }
.tl-item { position: relative; }
.tl-item::before {
    content: ""; position: absolute; left: -31px; top: 8px;
    width: 12px; height: 12px; border-radius: 50%; background: var(--accent);
}
.tl-year { font-weight: 800; color: var(--brand); margin-right: 14px; font-size: 1.1rem; }
.tl-item p { display: inline; color: var(--text-2); }

/* ---------- CTA ---------- */
.cta-band { background: var(--bg-alt); }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.cta-inner h2 { color: var(--brand); margin-bottom: 8px; }
.cta-inner p { color: var(--text-2); }
.cta-phone { font-size: 1.8rem; font-weight: 800; color: var(--accent); margin-bottom: 12px; }

/* ---------- 内页 Banner ---------- */
.page-banner {
    height: 280px; background-size: cover; background-position: center;
    display: flex; align-items: flex-end; position: relative;
}
.page-banner::after { content: ""; position: absolute; inset: 0; background: linear-gradient(rgba(8,44,79,.25), rgba(8,44,79,.55)); }
.page-banner-sm { height: 200px; }
.page-banner .container { position: relative; z-index: 2; padding-bottom: 24px; width: 100%; }
.page-banner h1 { color: #fff; font-size: 1.9rem; }
.breadcrumb { color: rgba(255,255,255,.9); font-size: .95rem; }
.breadcrumb a { color: rgba(255,255,255,.9); }
.breadcrumb a:hover { color: var(--accent); }

/* ---------- 筛选 ---------- */
/* ---------- 产品中心：吸顶分类选项卡 ---------- */
.banner-kicker { color: rgba(255,255,255,.82); font-size: .95rem; letter-spacing: 3px; margin-bottom: 4px; }

.line-tabs-wrap {
    position: sticky; top: 72px; z-index: 90;
    background: #fff; border-bottom: 1px solid var(--border);
    box-shadow: 0 1px 8px rgba(11,61,110,.05);
}
.line-tabs { display: flex; gap: 30px; overflow-x: auto; scrollbar-width: none; }
.line-tabs::-webkit-scrollbar { display: none; }
.line-tabs a {
    position: relative; display: flex; align-items: center; gap: 7px;
    padding: 14px 2px; font-size: 1rem; color: var(--text-2);
    white-space: nowrap; transition: color .2s;
}
.line-tabs a:hover { color: var(--brand); }
.line-tabs a.active { color: var(--brand); font-weight: 700; }
.line-tabs a.active::after {
    content: ""; position: absolute; left: 0; right: 0; bottom: -1px;
    height: 3px; border-radius: 3px 3px 0 0;
    background: var(--line-accent, var(--accent));
}
.tab-count {
    font-size: .72rem; line-height: 1.4; border-radius: 999px;
    padding: 1px 8px; background: var(--bg-alt); color: var(--text-2);
}
.line-tabs a.active .tab-count { background: var(--line-accent, var(--accent)); color: #fff; }

/* ---------- 产品线大类介绍区（选中具体产品线时） ---------- */
.line-hero {
    background:
        radial-gradient(1100px 380px at 85% -20%, rgba(255,255,255,.10), transparent 60%),
        linear-gradient(135deg, var(--brand-dark), var(--brand));
    color: #fff;
}
.line-hero-inner {
    display: grid; grid-template-columns: 1.05fr 1fr; gap: 44px;
    padding-top: 42px; padding-bottom: 42px; align-items: center;
}
.line-hero-text .line-tag {
    display: inline-block; font-size: .85rem; letter-spacing: 1px;
    padding: 4px 14px; border: 1px solid rgba(255,255,255,.35);
    border-radius: 999px; color: rgba(255,255,255,.92); margin-bottom: 16px;
}
.line-hero-text h2 {
    font-size: 1.9rem; margin-bottom: 12px; position: relative; padding-bottom: 14px;
}
.line-hero-text h2::after {
    content: ""; position: absolute; left: 0; bottom: 0;
    width: 44px; height: 3px; border-radius: 2px; background: var(--line-accent, var(--accent));
}
.line-hero-text p { color: rgba(255,255,255,.85); font-size: .95rem; }
.line-hero-features { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.feat-tile {
    display: flex; gap: 12px; padding: 14px 16px;
    background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.15);
    border-radius: 10px; transition: background .2s;
}
.feat-tile:hover { background: rgba(255,255,255,.14); }
.feat-icon {
    flex: none; width: 38px; height: 38px; border-radius: 9px;
    background: var(--line-accent, var(--accent));
    display: flex; align-items: center; justify-content: center; color: #fff;
}
.feat-icon svg { width: 20px; height: 20px; }
.feat-body h4 { font-size: .98rem; margin-bottom: 3px; }
.feat-body p { font-size: .8rem; line-height: 1.55; color: rgba(255,255,255,.72); }

/* ---------- 产品中心：「全部」总览 ---------- */
.overview-intro { background: var(--bg-alt); padding: 24px 0; }
.overview-intro p { max-width: 960px; color: var(--text-2); font-size: .95rem; }

.line-overview-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
    margin-top: 36px;
}
.line-card {
    background: #fff; border: 1px solid var(--border); border-left: 4px solid var(--line-accent);
    border-radius: 10px; padding: 20px 18px 18px; box-shadow: var(--shadow);
    display: flex; flex-direction: column; transition: transform .25s, box-shadow .25s;
}
.line-card:hover { transform: translateY(-4px); box-shadow: 0 10px 26px rgba(11,61,110,.14); }
.line-card h3 {
    display: flex; align-items: center; justify-content: space-between;
    font-size: 1.08rem; color: var(--brand); padding: 0;
}
.line-card .line-card-tag { margin-top: 8px; font-size: .85rem; font-weight: 600; color: var(--line-accent); }
.line-card p { color: var(--text-2); font-size: .85rem; line-height: 1.6; }
.line-card .line-more {
    margin-top: auto; padding-top: 14px;
    font-size: .85rem; font-weight: 600; color: var(--line-accent);
}
.grid-divider {
    display: flex; align-items: center; gap: 16px;
    margin: 34px 0 26px; color: var(--text-2); font-size: 1.02rem; font-weight: 600;
}
.grid-divider::before, .grid-divider::after {
    content: ""; flex: 1; height: 1px; background: var(--border);
}
.grid-divider::before { max-width: 48px; }
.grid-divider::after { max-width: calc(100% - 96px); }

/* ---------- 产品卡片增强：徽标 + 查看详情 ---------- */
.products-section { padding-top: 30px; }
.product-card { position: relative; }
.product-card .card-badge {
    position: absolute; top: 12px; left: 12px; z-index: 2;
    font-size: .72rem; color: #fff; background: var(--line-accent, var(--brand));
    border-radius: 999px; padding: 2px 10px;
}
.product-card .card-body { padding: 0 16px 16px; display: flex; flex-direction: column; flex: 1; }
.product-card h3 { padding: 14px 0 4px; }
.product-card .card-more {
    margin-top: auto; padding-top: 10px;
    font-size: .85rem; font-weight: 600; color: var(--line-accent, var(--brand));
    opacity: 0; transform: translateX(-4px); transition: .25s;
}
.product-card:hover .card-more { opacity: 1; transform: translateX(0); }

/* ---------- 解决方案页 ---------- */
.btn-light { background: #fff; color: var(--brand); font-weight: 600; }
.btn-light:hover { background: var(--accent); color: #fff; }

.sol-hero {
    background:
        radial-gradient(900px 320px at 90% -30%, rgba(255,255,255,.10), transparent 60%),
        linear-gradient(135deg, var(--brand-dark), var(--brand));
    color: #fff;
}
.sol-hero-inner {
    display: flex; align-items: center; justify-content: space-between; gap: 40px;
    padding-top: 44px; padding-bottom: 44px;
}
.sol-hero-text { max-width: 780px; }
.sol-hero-text h2 { font-size: 1.7rem; margin-bottom: 12px; }
.sol-hero-text p { color: rgba(255,255,255,.85); font-size: .98rem; }
.sol-hero-cta { flex: none; padding: 12px 26px; font-size: 1rem; }

.trend-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.trend-card {
    background: #fff; border: 1px solid var(--border); border-radius: 10px;
    padding: 26px 24px; transition: transform .25s, box-shadow .25s;
}
.trend-card:hover { transform: translateY(-4px); box-shadow: 0 10px 26px rgba(11,61,110,.12); }
.trend-icon {
    display: flex; align-items: center; justify-content: center;
    width: 46px; height: 46px; border-radius: 11px; margin-bottom: 16px;
    background: rgba(11,61,110,.08); color: var(--brand);
}
.trend-icon svg { width: 24px; height: 24px; }
.trend-card h3 { font-size: 1.12rem; color: var(--brand); margin-bottom: 8px; }
.trend-card p { font-size: .9rem; color: var(--text-2); }

.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.adv-card {
    background: #fff; border: 1px solid var(--border); border-radius: 10px;
    padding: 24px 22px; display: flex; flex-direction: column;
    transition: transform .25s, box-shadow .25s;
}
.adv-card:hover { transform: translateY(-4px); box-shadow: 0 10px 26px rgba(11,61,110,.12); }
.adv-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.adv-no {
    font-size: 2.1rem; font-weight: 800; line-height: 1;
    background: linear-gradient(135deg, var(--brand), #4A7FB5);
    -webkit-background-clip: text; background-clip: text; color: transparent;
}
.adv-icon {
    display: flex; align-items: center; justify-content: center;
    width: 40px; height: 40px; border-radius: 10px;
    background: rgba(232,119,34,.10); color: var(--accent);
}
.adv-icon svg { width: 21px; height: 21px; }
.adv-card h3 { font-size: 1.08rem; color: var(--brand); margin-bottom: 8px; }
.adv-card p { font-size: .87rem; color: var(--text-2); }

.solution-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.solution-card {
    position: relative; background: #fff; border: 1px solid var(--border);
    border-radius: var(--radius); overflow: hidden; transition: .25s;
}
.solution-card:hover { box-shadow: var(--shadow); transform: translateY(-3px); }
.solution-card .card-img { height: 220px; overflow: hidden; }
.solution-card .card-img img { object-fit: cover; transition: transform .4s; }
.solution-card:hover .card-img img { transform: scale(1.05); }
.solution-card .sol-chip {
    position: absolute; top: 14px; left: 14px; z-index: 2;
    display: flex; align-items: center; gap: 7px;
    font-size: .82rem; font-weight: 600; color: #fff;
    background: rgba(8,44,79,.82); border-radius: 999px; padding: 5px 14px;
    backdrop-filter: blur(3px);
}
.sol-chip-icon { display: flex; }
.sol-chip-icon svg { width: 15px; height: 15px; }
.solution-card .sol-card-body { padding: 16px 18px 18px; display: flex; flex-direction: column; }
.solution-card .sol-card-body h3 { color: var(--brand); padding: 0; margin-bottom: 6px; font-size: 1.1rem; }
.solution-card .sol-card-body p { padding: 0; font-size: .9rem; color: var(--text-2); }
.solution-card .sol-more {
    margin-top: auto; padding-top: 12px;
    font-size: .87rem; font-weight: 600; color: var(--accent);
    opacity: 0; transform: translateX(-4px); transition: .25s;
}
.solution-card:hover .sol-more { opacity: 1; transform: translateX(0); }

@media (max-width: 900px) {
    .sol-hero-inner { flex-direction: column; align-items: flex-start; }
    .trend-grid { grid-template-columns: 1fr; }
    .adv-grid { grid-template-columns: repeat(2, 1fr); }
    .solution-grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
    .adv-grid { grid-template-columns: 1fr; }
    .solution-grid-4 { grid-template-columns: 1fr; }
}

/* 场景方案四列网格 + 无图卡片品牌占位 */
.solution-grid-4 { grid-template-columns: repeat(4, 1fr); }
.sol-img-ph {
    height: 220px; display: flex; flex-direction: column; gap: 12px;
    align-items: center; justify-content: center; color: #fff;
    background: linear-gradient(135deg, var(--brand-dark), var(--brand));
}
.sol-img-ph svg { width: 44px; height: 44px; opacity: .9; }
.sol-img-ph span { font-size: 1.05rem; font-weight: 600; letter-spacing: 1px; }
.sol-img-ph-lg { height: 320px; border-radius: var(--radius); }

.filter-tabs { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 32px; }
.filter-tabs a {
    padding: 8px 22px; border: 1px solid var(--border); border-radius: 99px;
    color: var(--text-2); transition: .2s;
}
.filter-tabs a:hover, .filter-tabs a.active { background: var(--brand); border-color: var(--brand); color: #fff; }

/* ---------- 产品详情 ---------- */
.product-detail { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: start; }
.pd-main-img { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; min-height: 340px; display: flex; align-items: center; }
.pd-main-img img { width: 100%; object-fit: contain; }
.pd-thumbs { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.pd-thumbs img { width: 80px; height: 80px; object-fit: contain; border: 1px solid var(--border); border-radius: 6px; cursor: pointer; background: #fff; padding: 4px; }
.pd-info h1 { font-size: 1.7rem; color: var(--brand); margin-bottom: 14px; }
.pd-summary { color: var(--text-2); font-size: 1.05rem; margin-bottom: 28px; }
.pd-actions { display: flex; align-items: center; gap: 18px; }
.pd-phone { color: var(--text-2); font-size: .92rem; }
.pd-body { background: #fff; }

/* ---------- 富文本 ---------- */
.prose h1 { color: var(--brand); margin: 8px 0 16px; font-size: 1.8rem; }
.prose h2 { color: var(--brand); margin: 32px 0 16px; }
.prose h3 { color: var(--brand); margin: 28px 0 14px; font-size: 1.3rem; }
.prose h4 { color: var(--text); margin: 22px 0 10px; font-size: 1.08rem; }
.prose p, .prose li { color: #33414d; margin-bottom: 10px; }
.prose ul, .prose ol { padding-left: 24px; margin-bottom: 14px; }
.prose .motto { font-weight: 700; color: var(--brand); }
.prose .text-muted { color: var(--text-2); font-size: .9rem; }
.motto { font-weight: 700; color: var(--brand); }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 48px; }
.contact-info h2 { color: var(--brand); margin-bottom: 20px; font-size: 1.4rem; }
.contact-info p { margin-bottom: 10px; color: #33414d; }
.qr-block { margin-top: 28px; display: flex; align-items: center; gap: 16px; }
.qr-block img { width: 120px; height: 120px; border: 1px solid var(--border); border-radius: var(--radius); }
.qr-block span { color: var(--text-2); }
.contact-form-wrap { background: var(--bg-alt); padding: 32px; border-radius: var(--radius); }
.contact-form-wrap h2 { color: var(--brand); margin-bottom: 20px; font-size: 1.4rem; }
.form-row { margin-bottom: 18px; }
.form-row label { display: block; margin-bottom: 6px; font-weight: 600; font-size: .95rem; }
.form-row label i { color: var(--accent); font-style: normal; }
.form-row input, .form-row select, .form-row textarea {
    width: 100%; padding: 10px 14px; border: 1px solid var(--border);
    border-radius: 6px; font-size: 1rem; font-family: inherit; background: #fff;
}
.form-row input:focus, .form-row textarea:focus, .form-row select:focus {
    outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px rgba(11,61,110,.12);
}
.hp-field { position: absolute; left: -9999px; height: 0; overflow: hidden; }
.form-success { background: #e8f7ee; border: 1px solid #b7e4c7; color: #1e6b3c; padding: 24px; border-radius: var(--radius); }
.form-success h3 { margin-bottom: 8px; }
.form-error { background: #fdeceb; border: 1px solid #f5b7b1; color: #a93226; padding: 12px 16px; border-radius: 6px; margin-bottom: 18px; }
.validation-summary-errors { background: #fdeceb; border: 1px solid #f5b7b1; color: #a93226; padding: 12px 16px; border-radius: 6px; margin-bottom: 18px; list-style: none; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--brand-dark); color: rgba(255,255,255,.85); padding: 56px 0 0; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 1fr 1.3fr 1fr; gap: 40px; padding-bottom: 36px; }
.footer-grid h4 { color: #fff; margin-bottom: 14px; font-size: 1.05rem; }
.footer-grid a { display: block; margin-bottom: 8px; color: rgba(255,255,255,.8); }
.footer-grid a:hover { color: var(--accent); }
.footer-grid p { margin-bottom: 8px; font-size: .95rem; }
.footer-grid .qr { width: 110px; height: 110px; background: #fff; border-radius: 6px; padding: 4px; }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,.15); padding: 18px 20px;
    display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
    font-size: .88rem; color: rgba(255,255,255,.6);
}
.footer-bottom a { color: rgba(255,255,255,.6); }
.footer-bottom a:hover { color: var(--accent); }

/* ---------- 错误页 ---------- */
.error-page { padding: 120px 20px; text-align: center; }
.error-page h1 { color: var(--brand); margin-bottom: 16px; }
.error-page p { color: var(--text-2); margin-bottom: 12px; }
.error-page .btn { margin: 0 6px; }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
    .four-grid, .card-grid { grid-template-columns: repeat(2, 1fr); }
    .line-hero-inner { grid-template-columns: 1fr; gap: 28px; }
    .line-overview-grid { grid-template-columns: repeat(2, 1fr); }
    .line-tabs-wrap { top: 56px; }
    .icon-grid { grid-template-columns: repeat(3, 1fr); }
    .case-grid, .solution-grid { grid-template-columns: repeat(2, 1fr); }
    .two-col, .contact-grid, .product-detail { grid-template-columns: 1fr; gap: 32px; }
    .footer-grid { grid-template-columns: 1fr; }
    .banner { height: 400px; }
    .banner-text h1 { font-size: 2.2rem; }
}
@media (max-width: 640px) {
    .nav-toggle { display: block; }
    .site-nav {
        display: none; position: absolute; top: 72px; left: 0; right: 0;
        background: #fff; flex-direction: column; align-items: stretch;
        box-shadow: var(--shadow); padding: 12px 0;
    }
    .site-nav.open { display: flex; }
    .sub-nav { position: static; box-shadow: none; display: none; padding-left: 20px; }
    .nav-item:hover .sub-nav { display: block; }
    .four-grid, .card-grid, .icon-grid, .case-grid, .solution-grid { grid-template-columns: 1fr; }
    .line-hero-features, .line-overview-grid { grid-template-columns: 1fr; }
    .banner { height: 320px; }
    .section { padding: 48px 0; }
    .form-row-inline { flex-direction: column; gap: 12px; }
}

/* ---- 解决方案详情页（自有视觉：封面双栏 + 挑战图标行 + 子系统卡 + 服务流程轴） ---- */
.sd-hero { padding: 56px 0; border-bottom: 1px solid var(--border); }
.sd-hero-inner { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: center; }
.sd-badge {
    display: inline-block; padding: 3px 14px; border-radius: 999px;
    font-size: .82rem; font-weight: 600; color: #fff; margin-bottom: 14px;
}
.sd-badge-scenario { background: var(--brand); }
.sd-badge-industry { background: var(--accent); }
.sd-hero h1 { font-size: 2.1rem; color: var(--brand); margin-bottom: 12px; }
.sd-lead { font-size: 1.05rem; color: var(--text-2); max-width: 520px; }
.sd-cta { display: flex; gap: 14px; margin-top: 26px; flex-wrap: wrap; }
.sd-hero-media img, .sd-hero-media .sol-img-ph-lg {
    width: 100%; height: 320px; object-fit: cover;
    border-radius: 12px; box-shadow: var(--shadow);
}

/* 常见挑战：图标行式 */
.sd-challenge-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px 24px; max-width: 960px; margin: 0 auto; }
.sd-challenge {
    display: flex; gap: 16px; align-items: flex-start;
    background: var(--bg-alt); border-radius: var(--radius); padding: 20px 22px;
    border-left: 3px solid var(--accent);
}
.sd-challenge-icon {
    flex: 0 0 44px; height: 44px; border-radius: 50%;
    background: #fff; color: var(--accent); display: flex; align-items: center; justify-content: center;
    box-shadow: var(--shadow);
}
.sd-challenge-icon svg { width: 22px; height: 22px; }
.sd-challenge h3 { font-size: 1rem; color: var(--brand); margin-bottom: 4px; }
.sd-challenge p { font-size: .9rem; color: var(--text-2); }

/* 我们的解决方案：子系统卡片 */
.sd-sec-stack { display: flex; flex-direction: column; gap: 24px; max-width: 960px; margin: 0 auto; }
.sd-sec-card {
    background: #fff; border: 1px solid var(--border); border-radius: 12px;
    padding: 26px 30px; box-shadow: var(--shadow);
}
.sd-sec-title { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; margin-bottom: 10px; }
.sd-sec-index {
    display: inline-flex; align-items: center; justify-content: center;
    width: 30px; height: 30px; border-radius: 8px; flex: 0 0 auto; align-self: center;
    background: var(--brand); color: #fff; font-weight: 700; font-size: .95rem;
}
.sd-sec-title h3 { font-size: 1.25rem; color: var(--brand); }
.sd-sec-motto {
    font-size: .92rem; font-weight: 600; color: var(--accent);
    background: #FDF3EA; padding: 3px 12px; border-radius: 999px;
}
.sd-sec-desc { color: var(--text-2); margin-bottom: 18px; }
.sd-sec-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.sd-how-label {
    display: inline-block; font-size: .85rem; font-weight: 700; color: var(--brand);
    margin-bottom: 8px; padding-bottom: 4px; border-bottom: 2px solid var(--brand);
}
.sd-how p { font-size: .92rem; color: var(--text); }
.sd-gain-list { list-style: none; }
.sd-gain-list li {
    position: relative; padding: 0 0 10px 24px; font-size: .9rem; color: var(--text-2);
}
.sd-gain-list li::before {
    content: "✓"; position: absolute; left: 0; top: 0;
    color: var(--accent); font-weight: 800;
}
.sd-gain-list strong { color: var(--text); font-weight: 700; margin-right: 6px; }

/* 服务流程：深蓝横轴 */
.sd-flow { background: linear-gradient(135deg, var(--brand) 0%, var(--brand-dark) 100%); padding: 64px 0; }
.sd-flow-steps {
    display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px;
    margin-top: 36px; position: relative;
}
.sd-flow-steps::before {
    content: ""; position: absolute; top: 26px; left: 8%; right: 8%;
    height: 2px; background: rgba(255,255,255,.25);
}
.sd-flow-step { text-align: center; position: relative; }
.sd-flow-dot {
    display: inline-flex; align-items: center; justify-content: center;
    width: 52px; height: 52px; border-radius: 50%;
    background: rgba(255,255,255,.14); border: 2px solid rgba(255,255,255,.5);
    color: #fff; margin-bottom: 14px; position: relative; z-index: 1;
}
.sd-flow-dot svg { width: 24px; height: 24px; }
.sd-flow-step h3 { color: #fff; font-size: 1.02rem; margin-bottom: 6px; }
.sd-flow-step p { color: rgba(255,255,255,.78); font-size: .84rem; }

/* 其他方案 */
.sol-other-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 20px; }
.sol-other-item { text-align: center; transition: .2s; }
.sol-other-item img { height: 130px; width: 100%; object-fit: cover; border-radius: var(--radius); }
.sol-other-item:hover { transform: translateY(-3px); }
.sol-other-item > span { display: block; margin-top: 10px; font-weight: 600; color: var(--brand); }

@media (max-width: 900px) {
    .sd-hero-inner { grid-template-columns: 1fr; gap: 28px; }
    .sd-challenge-grid { grid-template-columns: 1fr; }
    .sd-sec-cols { grid-template-columns: 1fr; }
    .sd-flow-steps { grid-template-columns: repeat(2, 1fr); }
    .sd-flow-steps::before { display: none; }
    .sd-hero h1 { font-size: 1.7rem; }
}
@media (max-width: 560px) {
    .sd-flow-steps { grid-template-columns: 1fr; }
}

/* ---- 首页解决方案分组 ---- */
.sol-group-label {
    display: inline-flex; align-items: center; gap: 8px;
    margin: 18px 0 14px; font-size: 1.05rem; font-weight: 700; color: var(--brand);
}
.sol-group-label::before {
    content: ""; width: 4px; height: 18px; border-radius: 2px;
    background: var(--brand); display: inline-block;
}
.home-sol-grid { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }

/* ---- 解决方案选项卡 ---- */
.sol-tabs { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
.sol-tab {
    border: 1px solid var(--line, #dbe4ee); background: #fff; color: var(--ink, #1c2b3a);
    padding: 10px 22px; border-radius: 999px; font-size: 15px; cursor: pointer;
    transition: all .18s ease;
}
.sol-tab:hover { border-color: var(--brand, #0B3D6E); color: var(--brand, #0B3D6E); }
.sol-tab.active { background: var(--brand, #0B3D6E); border-color: var(--brand, #0B3D6E); color: #fff; }
.sol-tab-count {
    display: inline-block; min-width: 22px; padding: 0 7px; margin-left: 4px;
    border-radius: 999px; background: rgba(11,61,110,.09); font-size: 12.5px; line-height: 20px; text-align: center;
}
.sol-tab.active .sol-tab-count { background: rgba(255,255,255,.22); }
.sol-group-hint { color: var(--muted, #64748b); font-size: 14.5px; margin-bottom: 26px; }
.sol-chip-scenario { --chip: #0B3D6E; }
.sol-chip-industry { --chip: #B5541C; }
.sol-chip { background: var(--chip, #0B3D6E); }