/* ============================================================
   三宝电气集团官网 - 全站公共样式
   主色：#0A2540（深海蓝） 强调：#C9A961（哑光金） 中性：#0F172A / #64748B
   设计风格：高端集团官网，大量留白，模块化布局
   响应式断点：手机 <768px / 平板 768-1024px / 桌面 >1024px
   ============================================================ */
:root {
  --c-primary: #0A2540;
  --c-primary-dark: #061A2E;
  --c-primary-light: #F0F4F8;
  --c-accent: #C9A961;
  --c-accent-dark: #A88B42;
  --c-accent-light: #F7F2E6;
  --c-cta: #F59E0B;
  --c-cta-dark: #D97706;
  --c-cta-light: #FEF3C7;
  --c-danger: #DC2626;
  --c-success: #16A34A;
  --c-ink: #0F172A;
  --c-body: #334155;
  --c-muted: #94A3B8;
  --c-line: #E2E8F0;
  --c-bg: #ffffff;
  --c-bg-soft: #F8FAFC;
  --c-bg-dark: #0A2540;
  --gradient-primary: linear-gradient(135deg, #0A2540 0%, #1E3A5F 100%);
  --gradient-hero: linear-gradient(135deg, #061A2E 0%, #0A2540 50%, #1E3A5F 100%);
  --gradient-accent: linear-gradient(135deg, #C9A961 0%, #E8D5A3 100%);
  --radius: 8px;
  --radius-lg: 16px;
  --shadow: 0 4px 24px rgba(10, 37, 64, .08);
  --shadow-lg: 0 12px 40px rgba(10, 37, 64, .12);
  --shadow-hover: 0 16px 48px rgba(10, 37, 64, .18);
  --font: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); color: var(--c-body); background: var(--c-bg); line-height: 1.8; font-size: 16px; overflow-x: hidden; }

a { color: var(--c-primary); text-decoration: none; transition: color .2s; }
a:hover { color: var(--c-accent); }
img { max-width: 100%; display: block; }
.container { width: min(1200px, 92%); margin: 0 auto; }

/* ---------- 通用板块 ---------- */
.section { padding: 80px 0; }
.section.alt { background: var(--c-bg-soft); }
.section.dark { background: var(--c-primary); color: #E2E8F0; }
.section.dark h2, .section.dark h3 { color: #fff; }
.section-head { margin-bottom: 48px; }
.section-head.center { text-align: center; }
.section-head h2 {
  font-size: 32px; font-weight: 700; color: var(--c-ink); letter-spacing: -.5px;
  position: relative; display: inline-block; padding-bottom: 16px;
}
.section-head.center h2 { display: block; }
.section-head h2::after {
  content: ''; position: absolute; bottom: 0; left: 0;
  width: 48px; height: 3px; background: var(--c-accent); border-radius: 2px;
}
.section-head.center h2::after { left: 50%; transform: translateX(-50%); }
.section-head p { color: var(--c-muted); font-size: 16px; margin-top: 12px; }

/* ---------- 顶部信息条 ---------- */
.topbar { background: var(--c-primary-dark); color: #94A3B8; font-size: 13px; border-bottom: 1px solid rgba(255,255,255,.06); }
.topbar .container { display: flex; justify-content: space-between; align-items: center; min-height: 38px; gap: 16px; flex-wrap: wrap; }
.topbar a { color: #CBD5E1; margin-right: 18px; transition: color .2s; }
.topbar a:hover { color: var(--c-accent); }
.lang-switch { display: flex; gap: 4px; align-items: center; }
/* topbar 内的语言切换：默认隐藏（桌面用导航栏语言），手机端显示 */
.topbar-lang { display: none; }
.lang-switch button {
  background: transparent; color: #94A3B8; border: 1px solid transparent; padding: 3px 9px;
  border-radius: 4px; cursor: pointer; font-size: 12px; font-family: inherit; transition: all .2s;
}
.lang-switch button.active { background: var(--c-accent); color: var(--c-primary-dark); border-color: var(--c-accent); font-weight: 600; }
.lang-switch button:hover:not(.active) { color: #fff; }

/* ---------- 主导航 ---------- */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.98); border-bottom: 1px solid var(--c-line); backdrop-filter: blur(10px); box-shadow: 0 1px 8px rgba(10,37,64,.04); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 16px; }
.nav-logo { display: flex; align-items: center; gap: 10px; text-decoration: none; flex-shrink: 0; }
.nav-logo img { height: 36px; width: auto; flex-shrink: 0; }
.nav-logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.nav-logo-text .cn { font-size: 15px; font-weight: 700; color: var(--c-primary); letter-spacing: .3px; white-space: nowrap; }
.nav-logo-text .en { font-size: 8px; color: var(--c-muted); letter-spacing: .8px; text-transform: uppercase; white-space: nowrap; }
.nav-logo-text .official-badge {
  display: inline-block; font-size: 9px; color: #fff; background: var(--c-accent);
  padding: 1px 6px; border-radius: 3px; margin-top: 3px; font-weight: 600;
  letter-spacing: 1px; width: fit-content;
}
.nav-links { display: flex; gap: 0; list-style: none; }
.nav-links a { display: block; padding: 8px 14px; border-radius: 6px; color: var(--c-ink); font-weight: 500; font-size: 14px; transition: all .2s; position: relative; }
.nav-links a:hover, .nav-links a.active { color: var(--c-primary); background: var(--c-primary-light); }
.nav-links a.active::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 20px; height: 2px; background: var(--c-accent); border-radius: 1px; }
.nav-toggle { display: none; background: none; border: 1px solid var(--c-line); border-radius: 6px; padding: 8px 12px; font-size: 20px; cursor: pointer; color: var(--c-primary); }

/* 导航栏中的语言切换 */
.nav-lang { margin-left: 16px; display: flex; gap: 4px; }
.nav-lang button {
  background: transparent; color: var(--c-body); border: 1px solid var(--c-line);
  padding: 6px 12px; border-radius: 4px; cursor: pointer; font-size: 12px; font-family: inherit;
  transition: all .2s; font-weight: 500;
}
.nav-lang button.active { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }
.nav-lang button:hover:not(.active) { background: var(--c-primary-light); color: var(--c-primary); border-color: var(--c-primary); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 14px 32px;
  border-radius: 6px; font-size: 15px; font-weight: 600; cursor: pointer;
  border: 2px solid transparent; transition: all .25s; text-decoration: none;
  letter-spacing: .5px;
}
.btn-primary { background: var(--c-accent); color: var(--c-primary-dark); border-color: var(--c-accent); }
.btn-primary:hover { background: var(--c-accent-dark); border-color: var(--c-accent-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(201,169,97,.3); }
.btn-outline { background: transparent; color: #fff; border-color: rgba(255,255,255,.4); }
.btn-outline:hover { background: #fff; color: var(--c-primary); border-color: #fff; }
.btn-dark { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }
.btn-dark:hover { background: var(--c-primary-dark); border-color: var(--c-primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(10,37,64,.25); }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, #061A2E 0%, #0A2540 50%, #0F3460 100%);
  color: #fff; padding: 110px 0 100px; position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background-image: radial-gradient(ellipse at 75% 30%, rgba(201,169,97,.15) 0%, transparent 55%),
                    radial-gradient(ellipse at 15% 80%, rgba(255,255,255,.05) 0%, transparent 45%);
  pointer-events: none;
}
.hero::after {
  content: ''; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 60px 60px; pointer-events: none;
}
.hero .container { position: relative; z-index: 1; }
.hero-eyebrow { display: inline-block; font-size: 13px; letter-spacing: 3px; text-transform: uppercase; color: var(--c-accent); margin-bottom: 20px; font-weight: 600; border: 1px solid rgba(201,169,97,.3); padding: 6px 16px; border-radius: 999px; background: rgba(201,169,97,.08); }
.hero h1 { font-size: clamp(32px, 5vw, 56px); line-height: 1.15; margin-bottom: 24px; font-weight: 800; letter-spacing: -1px; }
.hero h1 .accent { color: var(--c-accent); }
.hero p { color: #94A3B8; max-width: 640px; font-size: 18px; font-weight: 400; line-height: 1.8; }
.hero .hero-tags { margin-top: 32px; display: flex; gap: 12px; flex-wrap: wrap; }
.hero .hero-tags span {
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12);
  padding: 8px 20px; border-radius: 4px; font-size: 14px; font-weight: 500; color: #CBD5E1;
  transition: all .25s;
}
.hero .hero-tags span:hover { background: rgba(201,169,97,.15); border-color: var(--c-accent); color: var(--c-accent); }
.hero-actions { margin-top: 40px; display: flex; gap: 16px; flex-wrap: wrap; }

/* ---------- 新闻卡片 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.news-card { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); overflow: hidden; transition: transform .2s, box-shadow .2s; display: flex; flex-direction: column; }
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.news-card .thumb { position: relative; aspect-ratio: 16/10; overflow: hidden; background: var(--c-bg-soft); }
.news-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s; }
.news-card:hover .thumb img { transform: scale(1.04); }
.news-card .cat { position: absolute; left: 12px; top: 12px; background: var(--c-primary); color: #fff; font-size: 12px; padding: 3px 10px; border-radius: 999px; }
.news-card .body { padding: 16px 18px 18px; display: flex; flex-direction: column; flex: 1; }
.news-card .title { font-size: 17px; color: var(--c-ink); font-weight: 600; margin-bottom: 8px; line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; min-height: 51px; }
.news-card .summary { font-size: 14px; color: var(--c-muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 14px; flex: 1; }
.news-card .meta { display: flex; justify-content: space-between; color: var(--c-muted); font-size: 13px; border-top: 1px dashed var(--c-line); padding-top: 12px; }

/* ---------- 分页 ---------- */
.pagination { display: flex; justify-content: center; align-items: center; gap: 8px; margin-top: 34px; flex-wrap: wrap; }
.pagination button, .pagination .page-info {
  min-width: 38px; height: 38px; padding: 0 12px; border-radius: 8px; border: 1px solid var(--c-line);
  background: #fff; color: var(--c-body); font-size: 14px; cursor: pointer; font-family: inherit;
}
.pagination button:hover:not(:disabled) { border-color: var(--c-primary); color: var(--c-primary); }
.pagination button:disabled { opacity: .45; cursor: not-allowed; }
.pagination button.active { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }
.pagination .page-info { border: none; color: var(--c-muted); }

/* ---------- 筛选 ---------- */
.filter-bar { display: flex; gap: 10px; margin-bottom: 26px; flex-wrap: wrap; }
.filter-bar button { padding: 8px 18px; border-radius: 999px; border: 1px solid var(--c-line); background: #fff; cursor: pointer; color: var(--c-body); font-family: inherit; font-size: 14px; }
.filter-bar button.active { background: var(--c-primary); border-color: var(--c-primary); color: #fff; }

/* ---------- 空态 / 加载 / 错误 ---------- */
.state-box { text-align: center; padding: 70px 20px; color: var(--c-muted); }
.state-box .icon { font-size: 44px; margin-bottom: 12px; }
.state-box h3 { color: var(--c-ink); margin-bottom: 8px; }
.skeleton { background: linear-gradient(90deg, #eef2f7 25%, #f8fafc 50%, #eef2f7 75%); background-size: 200% 100%; animation: shimmer 1.3s infinite; border-radius: var(--radius); }
@keyframes shimmer { to { background-position: -200% 0; } }

/* ---------- 详情页 ---------- */
.breadcrumb { font-size: 14px; color: var(--c-muted); padding: 18px 0 0; }
.breadcrumb a { color: var(--c-muted); }
.breadcrumb a:hover { color: var(--c-primary); }
.article { max-width: 860px; margin: 0 auto; padding: 26px 0 60px; }
.article h1 { font-size: clamp(24px, 3.4vw, 34px); color: var(--c-ink); line-height: 1.35; margin: 16px 0 14px; }
.article .meta { display: flex; gap: 18px; flex-wrap: wrap; color: var(--c-muted); font-size: 14px; padding-bottom: 18px; border-bottom: 1px solid var(--c-line); margin-bottom: 24px; }
.article .meta span { display: inline-flex; align-items: center; gap: 6px; }
.article .cover { border-radius: var(--radius); overflow: hidden; margin-bottom: 26px; box-shadow: var(--shadow); }
.article .body-content { font-size: 16.5px; line-height: 1.9; color: #334155; word-break: break-word; }
.article .body-content h2 { font-size: 22px; color: var(--c-ink); margin: 28px 0 12px; }
.article .body-content h3 { font-size: 19px; color: var(--c-ink); margin: 22px 0 10px; }
.article .body-content p { margin: 12px 0; }
.article .body-content ul, .article .body-content ol { margin: 12px 0 12px 24px; }
.article .body-content blockquote { border-left: 4px solid var(--c-accent); background: #fffbeb; padding: 12px 18px; margin: 16px 0; border-radius: 0 8px 8px 0; }
.article .body-content a { color: var(--c-primary); text-decoration: underline; }
.article .tags { margin-top: 30px; display: flex; gap: 8px; flex-wrap: wrap; }
.article .tags span { background: var(--c-bg-soft); border: 1px solid var(--c-line); padding: 4px 12px; border-radius: 999px; font-size: 13px; color: var(--c-body); }
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 26px; }
.gallery img { border-radius: 10px; aspect-ratio: 4/3; object-fit: cover; width: 100%; }
.related { max-width: 860px; margin: 0 auto 60px; }
.related h2 { font-size: 22px; color: var(--c-ink); margin-bottom: 18px; }
.related .rel-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.related .rel-card { display: flex; gap: 14px; align-items: center; border: 1px solid var(--c-line); border-radius: 10px; padding: 10px; transition: box-shadow .2s; }
.related .rel-card:hover { box-shadow: var(--shadow); }
.related .rel-card img { width: 110px; height: 74px; object-fit: cover; border-radius: 8px; background: var(--c-bg-soft); }
.related .rel-card .rt { font-size: 15px; color: var(--c-ink); font-weight: 500; line-height: 1.5; }
.related .rel-card .rd { font-size: 13px; color: var(--c-muted); margin-top: 4px; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--c-primary-dark); color: #94A3B8; padding: 60px 0 28px; font-size: 14px; border-top: 3px solid var(--c-accent); }
.site-footer .cols { display: grid; grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: 40px; }
.site-footer h4 { color: #E2E8F0; margin-bottom: 18px; font-size: 15px; font-weight: 600; letter-spacing: .5px; }
.site-footer a { color: #94A3B8; display: block; margin-bottom: 10px; transition: color .2s; }
.site-footer a:hover { color: var(--c-accent); }
.site-footer .footer-brand { font-size: 20px; font-weight: 700; color: #fff; margin-bottom: 12px; letter-spacing: 1px; }
.site-footer .footer-desc { color: #64748B; line-height: 1.8; margin-bottom: 16px; }
.site-footer .copy { text-align: center; border-top: 1px solid rgba(255,255,255,.08); margin-top: 40px; padding-top: 22px; font-size: 13px; color: #64748B; }

/* ---------- 首页特性 ---------- */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg); padding: 32px 28px; transition: all .3s; }
.feature:hover { border-color: var(--c-accent); box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.feature .ico { width: 56px; height: 56px; border-radius: 12px; background: var(--c-accent-light); color: var(--c-accent-dark); display: flex; align-items: center; justify-content: center; font-size: 26px; margin-bottom: 18px; }
.feature h3 { color: var(--c-ink); margin-bottom: 10px; font-size: 19px; font-weight: 700; }
.feature p { font-size: 15px; color: var(--c-body); line-height: 1.7; }

.cta-band {
  background: linear-gradient(135deg, #061A2E, #0A2540); color: #fff; text-align: center;
  padding: 70px 40px; border-radius: var(--radius-lg); margin: 0; position: relative; overflow: hidden;
}
.cta-band::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(201,169,97,.12) 0%, transparent 60%);
}
.cta-band h2 { margin-bottom: 16px; font-size: 32px; font-weight: 800; position: relative; letter-spacing: -.5px; }
.cta-band p { position: relative; color: #94A3B8; font-size: 16px; margin-bottom: 8px; }
.cta-band .btn { display: inline-block; background: var(--c-accent); color: var(--c-primary-dark); padding: 16px 40px; border-radius: 6px; margin-top: 28px; font-weight: 700; position: relative; transition: all .25s; font-size: 16px; }
.cta-band .btn:hover { background: var(--c-accent-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 10px 28px rgba(201,169,97,.3); }

/* ---------- 产品中心 ---------- */
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.product-card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg); overflow: hidden;
  transition: all .35s cubic-bezier(.4,0,.2,1); display: flex; flex-direction: column;
}
.product-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: var(--c-accent); }
.product-img { background: #F1F5F9; aspect-ratio: 4/3; overflow: hidden; position: relative; }
.product-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s cubic-bezier(.4,0,.2,1); }
.product-card:hover .product-img img { transform: scale(1.08); }
.product-body { padding: 24px 22px 28px; flex: 1; }
.product-body h3 { color: var(--c-ink); font-size: 19px; margin-bottom: 10px; font-weight: 700; }
.product-body p { font-size: 14.5px; color: var(--c-body); line-height: 1.7; }
.product-body .product-tags { margin-top: 14px; display: flex; flex-wrap: wrap; gap: 6px; }
.product-body .product-tags span { font-size: 12px; color: var(--c-primary); background: var(--c-primary-light); padding: 4px 10px; border-radius: 4px; }

/* ---------- 数据统计带 ---------- */
.stats-band { background: linear-gradient(135deg, #061A2E 0%, #0A2540 100%); color: #fff; padding: 60px 0; position: relative; overflow: hidden; }
.stats-band::before { content: ''; position: absolute; inset: 0; background: radial-gradient(ellipse at 50% 50%, rgba(201,169,97,.08) 0%, transparent 70%); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; position: relative; }
.stat-item .stat-num { font-size: clamp(32px, 4vw, 48px); font-weight: 800; color: var(--c-accent); line-height: 1.1; letter-spacing: -1px; }
.stat-item .stat-label { font-size: 15px; color: #94A3B8; margin-top: 10px; font-weight: 500; }
.stat-item { transition: opacity .3s ease, transform .3s ease; }
.stat-item.stat-fade { opacity: 0; transform: translateY(8px); }
.stats-dots { display: flex; justify-content: center; gap: 8px; margin-top: 28px; position: relative; }
.stats-dot { width: 8px; height: 8px; border-radius: 50%; background: rgba(255,255,255,.2); cursor: pointer; transition: all .3s; }
.stats-dot.active { background: var(--c-accent); width: 24px; border-radius: 4px; }

/* ---------- 核心优势 ---------- */
.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; margin-top: 10px; }
.why-card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg); padding: 32px 24px;
  text-align: center; transition: all .3s;
}
.why-card:hover { border-color: var(--c-primary); box-shadow: var(--shadow); transform: translateY(-4px); }
.why-ico {
  width: 60px; height: 60px; border-radius: 14px; background: var(--c-primary-light);
  display: flex; align-items: center; justify-content: center; font-size: 28px; margin: 0 auto 18px;
}
.why-card h3 { color: var(--c-ink); font-size: 18px; margin-bottom: 10px; font-weight: 700; }
.why-card p { font-size: 14px; color: var(--c-body); line-height: 1.7; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .news-grid, .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid, .why-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 28px 20px; }
  .site-footer .cols { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .nav-links { display: none; position: absolute; left: 0; right: 0; top: 60px; background: #fff; border-bottom: 1px solid var(--c-line); flex-direction: column; padding: 10px 4%; z-index: 100; }
  .nav-links.open { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a { padding: 12px 16px; font-size: 15px; border-bottom: 1px solid var(--c-bg); }
  .news-grid, .feature-grid, .product-grid, .why-grid, .gallery, .related .rel-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px 16px; }
  .section { padding: 36px 0; }
  .hero { padding: 50px 0 40px; }
  .site-footer .cols { grid-template-columns: 1fr; gap: 24px; }
  .topbar .container { justify-content: center; }
  /* 移动端Logo缩小，隐藏英文，保留中文和官方标签 */
  .nav-logo img { height: 24px; max-width: 64px; object-fit: contain; object-position: left center; }
  .nav-logo-text .cn { font-size: 13px; }
  .nav-logo-text .en { display: none; }
  .nav-logo-text .official-badge { display: inline-block; font-size: 8px; padding: 0 4px; margin-top: 1px; }
  /* 手机端只显示logo图标，隐藏文字，避免把语言/菜单挤到中间 */
  .nav-logo-text { display: flex; }
  .nav { height: 60px; gap: 6px; min-width: 0; }
  /* 移动端语言切换：确保不被挤出、完整显示 */
  .nav-lang { margin-left: auto; gap: 2px; flex-shrink: 0; }
  .nav-lang button { padding: 3px 6px; font-size: 11px; min-width: 26px; line-height: 1.4; white-space: nowrap; }
  .nav-toggle { flex-shrink: 0; padding: 6px 10px; font-size: 18px; }
  .nav-logo { flex-shrink: 1; min-width: 0; }
  /* 手机端：语言切换移到顶部信息条右上角，导航栏只留logo+菜单 */
  .topbar-lang { display: flex; margin-left: auto; }
  .nav-lang { display: none; }
  .topbar .container { justify-content: flex-end; flex-wrap: nowrap; min-height: 32px; }
  .topbar .top-contact { display: none; }
  .topbar-lang button { padding: 2px 7px; font-size: 12px; color: #CBD5E1; }
  /* 移动端标题字体缩小 */
  .hero h1 { font-size: 26px; line-height: 1.3; }
  .hero p { font-size: 14px; line-height: 1.6; }
  .hero-eyebrow { font-size: 11px; padding: 5px 12px; }
  .section-head h2 { font-size: 22px; }
  .section-head p { font-size: 13px; }
  .hero-tags { flex-wrap: wrap; gap: 8px; }
  .hero-tags span { font-size: 12px; padding: 6px 12px; }
  .btn { padding: 12px 22px; font-size: 14px; }
  .hero-buttons { flex-direction: column; width: 100%; }
  .hero-buttons .btn { width: 100%; justify-content: center; }
  /* 移动端容器 */
  .container { padding: 0 16px; }
  /* 移动端卡片 */
  .product-card, .feature-card, .why-card { border-radius: 10px; }
  .product-img { aspect-ratio: auto; height: 130px; }
  .product-body { padding: 14px 14px 16px; }
  .product-body h3 { font-size: 15px; margin-bottom: 6px; }
  .product-body p { font-size: 12px; line-height: 1.5; }
  /* 生产场景改2列，图片更小 */
  .scene-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 10px; }
  .scene-card { aspect-ratio: 4/3; border-radius: 8px; }
  .scene-card .scene-overlay { padding: 10px; }
  .scene-card .scene-overlay span { font-size: 12px; }
  /* 移动端文字 */
  body { font-size: 14px; }
  h3 { font-size: 16px; }
  /* 移动端FAQ */
  .faq-item h4 { font-size: 14px; padding: 14px 16px; }
  .faq-item .answer { padding: 0 16px 14px; font-size: 13px; }
  /* 移动端新闻图片 */
  .news-card .thumb { aspect-ratio: auto; height: 130px; }
  .news-card .title { font-size: 14px; min-height: 40px; line-height: 1.4; }
  .news-card .summary { font-size: 12px; -webkit-line-clamp: 1; }
  .news-card .body { padding: 10px 12px 12px; }
  .news-card .meta { font-size: 11px; padding-top: 8px; }
  /* 移动端资质图片 */
  .cert-item { flex-direction: row; gap: 12px; }
  .cert-img { width: 80px; height: 80px; flex-shrink: 0; }
  .cert-info h3 { font-size: 14px; }
  .cert-info p { font-size: 12px; }
  /* 移动端Hero进一步压缩 */
  .hero { padding: 32px 0 30px; min-height: auto; }
  .hero h1 { font-size: 22px; line-height: 1.3; margin-bottom: 12px; }
  .hero p { font-size: 12px; margin-bottom: 16px; line-height: 1.6; }
  .hero-tags { margin-bottom: 16px; gap: 6px; }
  .hero-tags span { font-size: 11px; padding: 4px 10px; }
  .hero-eyebrow { font-size: 10px; margin-bottom: 12px; padding: 4px 10px; }
  .hero-buttons .btn { padding: 10px 18px; font-size: 13px; }
  /* 移动端section间距 */
  .section { padding: 28px 0; }
  .section-head { margin-bottom: 20px; }
  .section-head h2 { font-size: 20px; margin-bottom: 6px; }
  .section-head p { font-size: 12px; }
  /* 移动端优势/痛点图标 */
  .feature-icon, .why-icon { width: 44px; height: 44px; font-size: 20px; }
  .feature-card, .why-card { padding: 20px 16px; }
  /* 移动端统计 */
  .stats-band { padding: 36px 0; }
  .stat-num { font-size: 26px !important; }
  .stat-label { font-size: 11px; }
}

/* ---------- 浮动咨询按钮 ---------- */
.float-consult { position: fixed; right: 20px; bottom: 24px; z-index: 999; display: flex; flex-direction: column; gap: 10px; }
.fc-btn {
  width: 52px; height: 52px; border-radius: 50%; border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center; color: #fff;
  box-shadow: 0 4px 16px rgba(0,0,0,.18); transition: transform .2s, box-shadow .2s;
  font-size: 20px; font-weight: 700;
}
.fc-btn:hover { transform: scale(1.08); box-shadow: 0 6px 20px rgba(0,0,0,.25); }
.fc-wa { background: #25D366; }
.fc-wechat { background: #07C160; }
.fc-top { background: var(--c-primary); opacity: 0; pointer-events: none; transition: opacity .3s; }
.fc-wechat-popup {
  position: absolute; right: 64px; bottom: 62px; background: #fff; border-radius: 12px;
  padding: 18px; width: 200px; text-align: center; box-shadow: 0 8px 30px rgba(0,0,0,.15);
  display: none; border: 1px solid var(--c-line);
}
.fc-wechat-popup.show { display: block; }
.fc-wp-title { font-weight: 700; color: var(--c-ink); font-size: 15px; margin-bottom: 6px; }
.fc-wp-id { font-size: 13px; color: var(--c-primary); font-weight: 600; margin-bottom: 10px; }
.fc-wp-qr { font-size: 48px; margin: 8px 0; }
.fc-wp-tip { font-size: 12px; color: var(--c-muted); }

/* ---------- 客户痛点板块 ---------- */
.pain-section { background: var(--c-bg-soft); }
.pain-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; margin-top: 10px; }
.pain-card {
  background: #fff; border-radius: var(--radius-lg); padding: 32px 26px; border: 1px solid var(--c-line);
  border-left: 4px solid var(--c-danger); transition: all .3s;
}
.pain-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-left-color: var(--c-accent); }
.pain-card .pain-ico { font-size: 34px; margin-bottom: 16px; }
.pain-card h3 { color: var(--c-ink); font-size: 18px; margin-bottom: 12px; font-weight: 700; }
.pain-card p { font-size: 14.5px; color: var(--c-body); line-height: 1.7; }
.pain-card .pain-text { margin-bottom: 14px; }
/* 痛点卡片内的"我们的答案"高亮 */
.pain-card .pain-sol {
  background: var(--c-accent-light); border-radius: 8px; padding: 12px 14px;
  color: var(--c-primary); font-size: 13.5px; font-weight: 600; line-height: 1.6;
  border-left: 3px solid var(--c-accent);
}

/* ---------- 解决方案板块 ---------- */
.solution-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 10px; }
.sol-card {
  background: #fff; border-radius: var(--radius-lg); padding: 32px 28px;
  border: 1px solid var(--c-line); display: flex; gap: 20px; align-items: flex-start;
  transition: all .3s;
}
.sol-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--c-accent); }
.sol-card .sol-ico {
  width: 56px; height: 56px; border-radius: 12px; background: var(--c-primary); color: #fff;
  display: flex; align-items: center; justify-content: center; font-size: 26px; flex-shrink: 0;
}
.sol-card h3 { color: var(--c-ink); font-size: 19px; margin-bottom: 10px; font-weight: 700; }
.sol-card p { font-size: 15px; color: var(--c-body); line-height: 1.7; }

/* ---------- 应用场景板块 ---------- */
.scene-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 10px; }
.scene-card { position: relative; border-radius: var(--radius-lg); overflow: hidden; aspect-ratio: 4/3; }
.scene-card img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s; }
.scene-card:hover img { transform: scale(1.1); }
.scene-card .scene-overlay {
  position: absolute; inset: 0; background: linear-gradient(to top, rgba(6,26,46,.85) 0%, transparent 55%);
  display: flex; align-items: flex-end; padding: 22px;
}
.scene-card .scene-overlay span { color: #fff; font-weight: 700; font-size: 17px; letter-spacing: .5px; }

/* ---------- 内页通用 ---------- */
.page-hero {
  background: linear-gradient(135deg, #061A2E 0%, #0A2540 60%, #0F3460 100%);
  color: #fff; padding: 80px 0 70px; position: relative; overflow: hidden;
}
.page-hero::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 70% 30%, rgba(201,169,97,.12) 0%, transparent 55%);
}
.page-hero::after {
  content: ''; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 60px 60px;
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 { font-size: clamp(30px, 4.5vw, 44px); font-weight: 800; margin-bottom: 14px; letter-spacing: -.5px; }
.page-hero p { color: #94A3B8; font-size: 17px; max-width: 700px; line-height: 1.8; }
.breadcrumb { font-size: 13px; color: #64748B; margin-bottom: 18px; }
.breadcrumb a { color: #94A3B8; }
.breadcrumb a:hover { color: var(--c-accent); }

/* 产品详情板块 */
.product-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; margin-bottom: 60px; }
.product-detail.reverse { direction: rtl; }
.product-detail.reverse > * { direction: ltr; }
.product-detail .pd-img { border-radius: 16px; overflow: hidden; box-shadow: 0 12px 32px rgba(0,0,0,.1); }
.product-detail .pd-img img { width: 100%; height: auto; display: block; }
.product-detail .pd-info h2 { font-size: 28px; color: var(--c-ink); margin-bottom: 16px; font-weight: 800; }
.product-detail .pd-info .pd-tag {
  display: inline-block; background: var(--c-primary-light); color: var(--c-primary);
  padding: 4px 14px; border-radius: 999px; font-size: 13px; font-weight: 600; margin-bottom: 14px;
}
.feature-list { list-style: none; margin: 16px 0; }
.feature-list li { padding: 8px 0 8px 28px; position: relative; font-size: 15px; color: var(--c-body); }
.feature-list li::before { content: '✓'; position: absolute; left: 0; color: var(--c-success); font-weight: 700; }

/* 产品页：客户担心 → 三宝解决 */
.pd-solve { margin: 20px 0 24px; border-radius: 14px; overflow: hidden; border: 1px solid var(--c-line); background: #fff; box-shadow: 0 6px 18px rgba(0,0,0,.06); }
.pd-solve .pd-solve-head {
  display: flex; align-items: center; gap: 10px;
  font-size: 15px; font-weight: 800; color: #fff;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-dark, #0a3d6e));
  padding: 13px 18px; letter-spacing: .5px;
}
.pd-solve .pd-solve-ico { font-size: 20px; line-height: 1; }
.pd-solve .pd-solve-body { padding: 16px 18px 18px; }
.pd-solve .pd-solve-pain { font-size: 14px; color: var(--c-body); line-height: 1.75; margin-bottom: 12px; }
.pd-solve .pd-solve-pain::before { content: '⚠️ '; }
.pd-solve .pd-solve-ans {
  font-size: 14px; font-weight: 600; color: var(--c-primary); line-height: 1.6;
  background: var(--c-accent-light); border-radius: 8px; padding: 11px 14px; border-left: 3px solid var(--c-accent);
}
.pd-solve .pd-solve-ans::before { content: '✔ '; }

/* 关于我们 */
.about-intro { display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; align-items: center; }
.about-intro img { border-radius: 16px; box-shadow: 0 12px 32px rgba(0,0,0,.1); width: 100%; }
.about-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 10px; }
.about-card { background: #fff; border: 1px solid var(--c-line); border-radius: 16px; padding: 28px 24px; }
.about-card .ab-ico { font-size: 32px; margin-bottom: 14px; }
.about-card h3 { color: var(--c-ink); font-size: 19px; margin-bottom: 10px; font-weight: 700; }
.about-card p { font-size: 14.5px; color: var(--c-body); line-height: 1.7; }
.cert-list { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 16px; }
.cert-badge {
  background: var(--c-primary-light); color: var(--c-primary); padding: 8px 18px;
  border-radius: 8px; font-size: 14px; font-weight: 600; border: 1px solid #bfdbfe;
}

/* 联系我们 */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; }
.contact-info-card {
  background: linear-gradient(135deg, #1e3a8a, #1d4ed8); color: #fff; border-radius: 16px; padding: 32px;
}
.contact-info-card h3 { font-size: 22px; margin-bottom: 24px; font-weight: 700; }
.ci-item { display: flex; gap: 14px; margin-bottom: 22px; align-items: flex-start; }
.ci-item .ci-ico {
  width: 42px; height: 42px; border-radius: 10px; background: rgba(255,255,255,.15);
  display: flex; align-items: center; justify-content: center; font-size: 20px; flex-shrink: 0;
}
.ci-item .ci-text h4 { font-size: 14px; color: #93c5fd; margin-bottom: 4px; font-weight: 500; }
.ci-item .ci-text p { font-size: 15px; color: #fff; line-height: 1.5; }
.ci-item .ci-text a { color: #fff; }
.ci-item .ci-text a:hover { color: #fbbf24; }
.contact-form { background: #fff; border: 1px solid var(--c-line); border-radius: 16px; padding: 32px; }
.contact-form h3 { font-size: 22px; color: var(--c-ink); margin-bottom: 20px; font-weight: 700; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 14px; color: var(--c-ink); margin-bottom: 6px; font-weight: 500; }
.form-group input, .form-group textarea {
  width: 100%; padding: 11px 14px; border: 1px solid var(--c-line); border-radius: 10px;
  font-size: 15px; font-family: inherit; transition: border-color .2s; background: #fff;
}
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--c-primary); box-shadow: 0 0 0 3px rgba(29,78,216,.1); }
.form-group textarea { min-height: 100px; resize: vertical; }
.form-success {
  background: #dcfce7; color: #166534; padding: 14px 18px; border-radius: 10px;
  margin-top: 16px; font-size: 14px; display: none;
}
.faq-item { border-bottom: 1px solid var(--c-line); padding: 16px 0; }
.faq-item h4 { color: var(--c-ink); font-size: 16px; margin-bottom: 8px; font-weight: 600; }
.faq-item p { color: var(--c-body); font-size: 14.5px; line-height: 1.7; }

@media (max-width: 1024px) {
  .pain-grid, .scene-grid { grid-template-columns: repeat(2, 1fr); }
  .solution-grid, .about-grid, .contact-grid, .about-intro, .product-detail { grid-template-columns: 1fr; }
  .product-detail.reverse { direction: ltr; }
}
@media (max-width: 768px) {
  .pain-grid, .scene-grid, .solution-grid, .about-grid { grid-template-columns: 1fr; }
  .float-consult { right: 12px; bottom: 16px; gap: 8px; }
  .fc-btn { width: 44px; height: 44px; font-size: 18px; }
  .page-hero { padding: 48px 0 40px; }
  .chat-widget-panel { right: 12px; bottom: 70px; width: calc(100vw - 24px); max-width: 360px; }
  /* 移动端客服按钮和浮动按钮右对齐，放在最上面 */
  .chat-widget-btn { right: 12px; bottom: 168px; width: 44px; height: 44px; border-width: 2px; z-index: 1000; }
  /* 移动端顶部联系栏缩小 */
  .topbar { font-size: 11px; padding: 6px 0; }
  .top-contact a { margin: 0 4px; }
  /* 移动端产品卡片优化 */
  .product-card { margin-bottom: 16px; }
  .product-img { height: 180px; }
  /* 移动端统计数字 */
  .stat-num { font-size: 28px; }
  .stat-label { font-size: 12px; }
}

/* ---------- 在线客服面板 ---------- */
.chat-widget-btn {
  position: fixed; right: 20px; bottom: 210px; z-index: 1000;
  width: 56px; height: 56px; border-radius: 50%; border: 3px solid #fff; cursor: pointer;
  background: url('/assets/images/customer-service-avatar.jpg') center/cover no-repeat;
  box-shadow: 0 4px 16px rgba(10,37,64,.3); transition: all .3s;
  padding: 0;
}
.chat-widget-btn:hover { transform: scale(1.1); box-shadow: 0 6px 24px rgba(10,37,64,.45); }
.chat-widget-btn::after {
  content: ''; position: absolute; top: 0; right: 0; width: 14px; height: 14px;
  background: #22c55e; border-radius: 50%; border: 2px solid #fff;
}

.chat-widget-panel {
  position: fixed; right: 20px; bottom: 80px; z-index: 999;
  width: 380px; max-height: 80vh; background: #fff; border-radius: 16px;
  box-shadow: 0 20px 60px rgba(10,37,64,.25); overflow: hidden;
  display: flex; flex-direction: column;
  opacity: 0; visibility: hidden; transform: translateY(20px) scale(.95);
  transition: all .3s cubic-bezier(.4,0,.2,1);
}
.chat-widget-panel.open { opacity: 1; visibility: visible; transform: translateY(0) scale(1); }

.chat-header {
  background: linear-gradient(135deg, var(--c-primary-dark), var(--c-primary));
  color: #fff; padding: 18px 20px; display: flex; align-items: center; justify-content: space-between;
}
.chat-header-info { display: flex; align-items: center; gap: 12px; }
.chat-avatar {
  width: 48px; height: 48px; border-radius: 50%;
  background: url('/assets/images/customer-service-avatar.jpg') center/cover no-repeat;
  border: 2px solid rgba(255,255,255,.3);
  flex-shrink: 0;
}
.chat-title { font-size: 16px; font-weight: 700; }
.chat-status { font-size: 12px; color: #94A3B8; display: flex; align-items: center; gap: 6px; margin-top: 2px; }
.chat-dot { width: 8px; height: 8px; background: #22c55e; border-radius: 50%; display: inline-block; }
.chat-close {
  background: none; border: none; color: #94A3B8; font-size: 24px; cursor: pointer;
  width: 32px; height: 32px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  transition: all .2s; line-height: 1;
}
.chat-close:hover { background: rgba(255,255,255,.1); color: #fff; }

.chat-body { padding: 20px; overflow-y: auto; flex: 1; }
/* 聊天面板 Tab 切换 */
.chat-tabs { display: flex; gap: 6px; padding: 10px 12px 0; }
.chat-tab {
  flex: 1; padding: 9px 8px; border: 1px solid var(--c-line); background: #f8fafc;
  border-radius: 8px 8px 0 0; cursor: pointer; font-size: 13px; font-weight: 600;
  color: var(--c-muted); transition: all .2s; font-family: inherit;
}
.chat-tab.active { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }
.chat-live { padding: 24px 20px; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; }
.chat-live-welcome { margin-bottom: 20px; }
.chat-live-icon { font-size: 44px; margin-bottom: 12px; }
.chat-live-title { font-size: 17px; font-weight: 700; color: var(--c-ink); margin-bottom: 8px; }
.chat-live-desc { font-size: 13.5px; color: var(--c-body); line-height: 1.6; max-width: 280px; }
.chat-live-btn {
  display: inline-block; background: #07c160; color: #fff; border: none;
  padding: 13px 42px; border-radius: 999px; font-size: 16px; font-weight: 600;
  cursor: pointer; transition: all .2s; text-decoration: none; font-family: inherit;
}
.chat-live-btn:hover { background: #06ad56; transform: translateY(-1px); box-shadow: 0 6px 18px rgba(7,193,96,.3); }
.chat-live-tip { font-size: 12px; color: var(--c-muted); margin-top: 14px; }
.chat-form-box { padding: 20px; }
.chat-welcome { background: var(--c-bg-soft); border-radius: 12px; padding: 14px 16px; margin-bottom: 18px; }
.chat-welcome p { font-size: 14px; color: var(--c-body); line-height: 1.6; margin-bottom: 6px; }
.chat-welcome p:last-child { margin-bottom: 0; }

.chat-form { display: flex; flex-direction: column; gap: 12px; }
.chat-field input, .chat-field textarea {
  width: 100%; padding: 11px 14px; border: 1px solid var(--c-line); border-radius: 8px;
  font-size: 14px; font-family: inherit; transition: border-color .2s; background: #fff;
}
.chat-field input:focus, .chat-field textarea:focus { outline: none; border-color: var(--c-primary); box-shadow: 0 0 0 3px rgba(10,37,64,.08); }
.chat-field textarea { min-height: 70px; resize: vertical; }
.chat-submit {
  background: var(--c-primary); color: #fff; border: none; padding: 12px; border-radius: 8px;
  font-size: 15px; font-weight: 600; cursor: pointer; transition: all .2s; font-family: inherit;
}
.chat-submit:hover { background: var(--c-primary-dark); }
.chat-submit:disabled { opacity: .6; cursor: not-allowed; }
.chat-result { font-size: 13px; text-align: center; min-height: 20px; }
.chat-result.success { color: #16a34a; }
.chat-result.error { color: #dc2626; }

.chat-quick { margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--c-line); }
.chat-quick-title { font-size: 13px; color: var(--c-muted); margin-bottom: 10px; }
.chat-quick-btn {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px; border-radius: 8px; font-size: 14px; font-weight: 600; cursor: pointer;
  text-decoration: none; margin-bottom: 8px; transition: all .2s; border: none; width: 100%;
}
.chat-quick-btn.wa { background: #25D366; color: #fff; }
.chat-quick-btn.wa:hover { background: #1fb858; color: #fff; }
.chat-quick-btn.wx { background: #07C160; color: #fff; position: relative; }
.chat-quick-btn.wx:hover { background: #06a552; color: #fff; }

.chat-wechat-popup {
  position: absolute; bottom: 100%; left: 0; right: 0; margin-bottom: 8px;
  background: #fff; border-radius: 10px; padding: 14px; box-shadow: 0 8px 24px rgba(0,0,0,.15);
  display: none; text-align: center;
}
.chat-wechat-popup.show { display: block; }
.chat-wp-title { font-size: 13px; color: var(--c-muted); margin-bottom: 6px; }
.chat-wp-id { font-size: 18px; font-weight: 700; color: var(--c-ink); letter-spacing: 1px; }

/* ---------- 企业资质 ---------- */
.cert-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 32px;
}
.cert-item {
  background: #fff; border-radius: 12px; overflow: hidden;
  box-shadow: 0 2px 12px rgba(10,37,64,.08);
  transition: all .3s; cursor: pointer; border: 1px solid var(--c-line);
}
.cert-item:hover {
  transform: translateY(-4px); box-shadow: 0 8px 24px rgba(10,37,64,.15);
}
.cert-img-wrap {
  position: relative; aspect-ratio: 1448 / 1024; overflow: hidden; background: #f8fafc;
}
.cert-img-wrap img {
  width: 100%; height: 100%; object-fit: cover; transition: transform .4s;
}
.cert-item:hover .cert-img-wrap img { transform: scale(1.05); }
.cert-zoom {
  position: absolute; top: 10px; right: 10px; background: rgba(10,37,64,.7); color: #fff;
  padding: 6px 12px; border-radius: 20px; font-size: 12px; opacity: 0; transition: opacity .3s;
}
.cert-item:hover .cert-zoom { opacity: 1; }
.cert-info { padding: 16px 18px; }
.cert-info h3 { font-size: 16px; color: var(--c-ink); margin-bottom: 6px; font-weight: 600; }
.cert-info p { font-size: 13px; color: var(--c-body); line-height: 1.6; margin: 0; }
.cert-issuer {
  display: inline-block; margin-top: 8px; font-size: 12px; color: var(--c-primary);
  background: rgba(10,37,64,.06); padding: 3px 10px; border-radius: 4px;
}

/* 证书大图弹窗 */
.cert-modal {
  position: fixed; inset: 0; background: rgba(0,0,0,.85); z-index: 10000;
  display: none; align-items: center; justify-content: center; padding: 20px;
}
.cert-modal.show { display: flex; }
.cert-modal-content {
  max-width: 90vw; max-height: 90vh; position: relative;
}
.cert-modal-content img {
  max-width: 100%; max-height: 85vh; border-radius: 8px; box-shadow: 0 20px 60px rgba(0,0,0,.5);
}
.cert-modal-close {
  position: absolute; top: -40px; right: 0; background: none; border: none; color: #fff;
  font-size: 32px; cursor: pointer; width: 36px; height: 36px; line-height: 1;
}
.cert-modal-title {
  color: #fff; text-align: center; margin-top: 12px; font-size: 16px;
}

@media (max-width: 1024px) {
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .cert-grid { grid-template-columns: 1fr; }
}

/* ========== 高级视觉升级 ========== */

/* 滚动淡入动画 */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .8s cubic-bezier(.4,0,.2,1), transform .8s cubic-bezier(.4,0,.2,1);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: .1s; }
.reveal-delay-2 { transition-delay: .2s; }
.reveal-delay-3 { transition-delay: .3s; }
.reveal-delay-4 { transition-delay: .4s; }

/* 导航栏滚动效果 */
.site-header {
  transition: background .3s, box-shadow .3s, backdrop-filter .3s;
}
.site-header.scrolled {
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 2px 20px rgba(10,37,64,.1);
}
.site-header.scrolled .nav-logo-text .cn { color: var(--c-primary); }
.site-header.scrolled .nav-links a { color: var(--c-body); }
.site-header.scrolled .nav-links a:hover,
.site-header.scrolled .nav-links a.active { color: var(--c-primary); }

/* Hero 动态背景网格 */
.hero-bg-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(201,169,97,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201,169,97,.06) 1px, transparent 1px);
  background-size: 50px 50px;
  animation: gridMove 20s linear infinite;
}
@keyframes gridMove {
  0% { background-position: 0 0; }
  100% { background-position: 50px 50px; }
}

/* Hero 光晕效果 */
.hero-glow {
  position: absolute; border-radius: 50%; filter: blur(80px); opacity: .3; pointer-events: none;
}
.hero-glow-1 { width: 400px; height: 400px; background: var(--c-accent); top: -100px; right: -100px; animation: float 8s ease-in-out infinite; }
.hero-glow-2 { width: 300px; height: 300px; background: #1E40AF; bottom: -50px; left: -50px; animation: float 10s ease-in-out infinite reverse; }
@keyframes float {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(30px, -30px); }
}

/* 增强卡片悬浮 */
.product-card, .why-card, .pain-card, .scene-card, .cert-item {
  transition: transform .35s cubic-bezier(.4,0,.2,1), box-shadow .35s cubic-bezier(.4,0,.2,1);
}
.product-card:hover, .why-card:hover, .pain-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}
.scene-card:hover img { transform: scale(1.08); }
.scene-card img { transition: transform .5s cubic-bezier(.4,0,.2,1); }

/* CTA 按钮增强 */
.btn-primary {
  background: var(--c-cta);
  color: #fff;
  border: none;
  padding: 14px 32px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all .3s;
  display: inline-block;
  text-decoration: none;
  box-shadow: 0 4px 14px rgba(245,158,11,.35);
}
.btn-primary:hover {
  background: var(--c-cta-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(245,158,11,.45);
  color: #fff;
}
.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,.4);
  padding: 12px 30px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all .3s;
  display: inline-block;
  text-decoration: none;
}
.btn-outline:hover {
  border-color: var(--c-accent);
  color: var(--c-accent);
  background: rgba(201,169,97,.08);
}

/* 板块标题装饰线 */
.section-head h2 {
  position: relative;
  display: inline-block;
}
.section-head h2::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 50%;
  transform: translateX(-50%);
  width: 50px;
  height: 3px;
  background: var(--gradient-accent);
  border-radius: 2px;
}
.section-head.center h2::after { left: 50%; transform: translateX(-50%); }
.section-head:not(.center) h2::after { left: 0; transform: none; }

/* 合作伙伴 Logo 墙 */
.partners-section { background: var(--c-bg-soft); padding: 60px 0; }
.partners-grid {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: 24px; margin-top: 32px;
}
.partner-item {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
  padding: 24px; display: flex; align-items: center; justify-content: center;
  height: 80px; transition: all .3s;
}
.partner-item:hover {
  border-color: var(--c-accent);
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}
.partner-item span {
  font-size: 16px; font-weight: 700; color: var(--c-muted);
  letter-spacing: 1px;
}

/* 应用场景板块 */
.solution-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 32px;
}
.solution-card {
  position: relative; border-radius: var(--radius-lg); overflow: hidden;
  height: 280px; cursor: pointer;
}
.solution-card img {
  width: 100%; height: 100%; object-fit: cover; transition: transform .5s;
}
.solution-card:hover img { transform: scale(1.1); }
.solution-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(6,26,46,.9) 0%, rgba(6,26,46,.3) 60%, transparent 100%);
  display: flex; flex-direction: column; justify-content: flex-end; padding: 24px;
}
.solution-overlay h3 { color: #fff; font-size: 18px; margin-bottom: 6px; }
.solution-overlay p { color: rgba(255,255,255,.8); font-size: 13px; }

/* 数字统计增强 */
.stat-num {
  font-size: 42px; font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* 图片淡入 */
img[data-src] {
  opacity: 0;
  transition: opacity .5s;
}
img.loaded { opacity: 1; }

/* 回到顶部 */
.back-to-top {
  position: fixed; bottom: 24px; left: 24px; z-index: 997;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--c-primary); color: #fff; border: none;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  font-size: 20px; opacity: 0; visibility: hidden;
  transition: all .3s; box-shadow: var(--shadow-lg);
}
.back-to-top.show { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--c-primary-dark); transform: translateY(-3px); }

@media (max-width: 1024px) {
  .partners-grid { grid-template-columns: repeat(3, 1fr); }
  .solution-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .partners-grid { grid-template-columns: repeat(2, 1fr); }
  .solution-grid { grid-template-columns: 1fr; }
  .stat-num { font-size: 32px; }
}

/* ============================================================
   移动端客服组件 修正（追加覆盖，避免被基础样式覆盖导致显示不全）
   ============================================================ */
@media (max-width: 768px) {
  .chat-widget-btn {
    right: 12px; bottom: 178px; width: 48px; height: 48px;
    border-width: 2px; z-index: 1000;
  }
  .chat-widget-btn::after { width: 12px; height: 12px; right: 0; top: 0; }
  .chat-widget-panel {
    right: 12px; bottom: 12px; width: calc(100vw - 24px); max-width: 360px;
    max-height: 78vh; z-index: 1001;
  }
  .float-consult { right: 12px; bottom: 16px; gap: 8px; z-index: 998; }
  .fc-btn { width: 44px; height: 44px; font-size: 18px; }
  .chat-live iframe, .chat-live { min-height: 320px; }
}