/* ============================================================
   广西盛汇芯网络科技有限公司 官网样式
   设计方向：科技蓝渐变 + 占位图（无外部图片依赖）
   最后更新：2026-09-30
   ============================================================ */

:root {
  --blue-50: #eff6ff;
  --blue-100: #dbeafe;
  --blue-200: #bfdbfe;
  --blue-500: #3b82f6;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;
  --cyan-400: #22d3ee;
  --cyan-500: #06b6d4;
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
  --white: #ffffff;
  --gradient: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
  --gradient-soft: linear-gradient(135deg, #eff6ff 0%, #ecfeff 100%);
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06), 0 1px 3px rgba(15, 23, 42, .08);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, .08), 0 2px 4px -2px rgba(15, 23, 42, .08);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, .10), 0 4px 6px -4px rgba(15, 23, 42, .10);
  --shadow-blue: 0 10px 30px -10px rgba(37, 99, 235, .35);
  --radius: 14px;
  --radius-sm: 10px;
  --radius-lg: 22px;
  --maxw: 1180px;
  --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans CN", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  font-family: var(--font);
  color: var(--slate-700);
  background: var(--white);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; display: block; }
ul { list-style: none; }

h1, h2, h3, h4 { color: var(--slate-900); line-height: 1.25; font-weight: 700; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ---------------- 按钮 ---------------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 26px; border-radius: 999px; font-weight: 600;
  font-size: 15px; cursor: pointer; border: none; transition: all .25s ease;
  white-space: nowrap;
}
.btn-primary { background: var(--gradient); color: #fff; box-shadow: var(--shadow-blue); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 36px -12px rgba(37,99,235,.55); }
.btn-outline { background: #fff; color: var(--blue-700); border: 1.5px solid var(--blue-200); }
.btn-outline:hover { border-color: var(--blue-500); background: var(--blue-50); }
.btn-ghost { background: rgba(255,255,255,.15); color:#fff; border:1px solid rgba(255,255,255,.5); }
.btn-ghost:hover { background: rgba(255,255,255,.28); }
.btn-sm { padding: 9px 18px; font-size: 14px; }

/* ---------------- 顶部导航 ---------------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.88);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--slate-200);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; color: var(--slate-900); font-size: 19px; }
.brand .logo-mark {
  width: 38px; height: 38px; border-radius: 10px; background: var(--gradient);
  display: grid; place-items: center; color: #fff; font-weight: 800; font-size: 17px;
  box-shadow: var(--shadow-blue);
}
.brand small { display: block; font-size: 11px; font-weight: 500; color: var(--slate-500); letter-spacing: .5px; }

.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  padding: 8px 14px; border-radius: 8px; font-size: 15px; color: var(--slate-600); font-weight: 500;
  transition: all .2s ease;
}
.nav-links a:hover { color: var(--blue-700); background: var(--blue-50); }
.nav-links a.active { color: var(--blue-700); background: var(--blue-50); font-weight: 600; }

.nav-cta { display: flex; align-items: center; gap: 10px; }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--slate-700); margin: 5px 0; transition: .3s; }

/* ---------------- 区块通用 ---------------- */
.section { padding: 84px 0; }
.section-tight { padding: 60px 0; }
.section-alt { background: var(--slate-50); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 52px; }
.section-head .eyebrow {
  display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: 1px;
  color: var(--blue-600); background: var(--blue-50); padding: 5px 14px; border-radius: 999px; margin-bottom: 16px;
}
.section-head h2 { font-size: 34px; margin-bottom: 14px; }
.section-head p { color: var(--slate-500); font-size: 17px; }

/* ---------------- Hero ---------------- */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(34,211,238,.25), transparent 60%),
    radial-gradient(900px 500px at 0% 0%, rgba(37,99,235,.30), transparent 55%),
    linear-gradient(135deg, #0f172a 0%, #1e3a8a 55%, #0e7490 100%);
  color: #fff; padding: 96px 0 96px;
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 44px 44px; mask-image: radial-gradient(circle at 50% 30%, #000, transparent 75%);
  pointer-events: none;
}
.hero .container { position: relative; z-index: 1; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600;
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.22);
  padding: 7px 16px; border-radius: 999px; margin-bottom: 22px;
}
.hero h1 { color: #fff; font-size: 46px; line-height: 1.18; margin-bottom: 20px; font-weight: 800; }
.hero h1 .grad { background: linear-gradient(90deg, #7dd3fc, #a5f3fc); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { font-size: 19px; color: rgba(255,255,255,.85); max-width: 640px; margin-bottom: 32px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 14px; }
.hero-contact { font-size: 15px; color: rgba(255,255,255,.8); display: flex; gap: 22px; flex-wrap: wrap; margin-top: 8px; }
.hero-contact b { color: #fff; }

/* ---------------- 数据卡片 ---------------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.stat-card {
  background: #fff; border: 1px solid var(--slate-200); border-radius: var(--radius);
  padding: 30px 24px; text-align: center; box-shadow: var(--shadow-sm);
  transition: transform .25s ease, box-shadow .25s ease;
}
.stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.stat-num { font-size: 42px; font-weight: 800; background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent; line-height: 1.1; }
.stat-label { color: var(--slate-500); font-size: 15px; margin-top: 6px; }

/* ---------------- 服务卡片 ---------------- */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.grid-4 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }

.card {
  background: #fff; border: 1px solid var(--slate-200); border-radius: var(--radius);
  padding: 30px; box-shadow: var(--shadow-sm); transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: var(--blue-200); }
.card .icon {
  width: 52px; height: 52px; border-radius: 13px; background: var(--gradient-soft);
  display: grid; place-items: center; margin-bottom: 18px; color: var(--blue-600); font-size: 26px;
  border: 1px solid var(--blue-100);
}
.card h3 { font-size: 20px; margin-bottom: 10px; }
.card p { color: var(--slate-500); font-size: 15px; }
.card .more { display: inline-block; margin-top: 16px; color: var(--blue-600); font-weight: 600; font-size: 14px; }
.card .more:hover { gap: 6px; }

/* 场景编号卡 */
.scenario { position: relative; overflow: hidden; }
.scenario .num {
  position: absolute; top: 14px; right: 18px; font-size: 46px; font-weight: 800;
  color: var(--slate-100); font-family: ui-monospace, monospace;
}
.scenario h3 { display: flex; align-items: center; gap: 10px; }
.scenario h3 .step { width: 30px; height: 30px; border-radius: 8px; background: var(--gradient); color: #fff; display: grid; place-items: center; font-size: 14px; flex: none; }
.scenario .effect { margin-top: 14px; font-size: 14px; color: var(--blue-700); background: var(--blue-50); padding: 8px 12px; border-radius: 8px; }

/* 优势卡 */
.adv-card { text-align: left; }
.adv-card .icon { background: var(--gradient); color: #fff; border: none; }
.adv-card h3 { font-size: 19px; }

/* ---------------- 案例 ---------------- */
.case-card { border: 1px solid var(--slate-200); border-radius: var(--radius); overflow: hidden; background: #fff; box-shadow: var(--shadow-sm); transition: transform .25s, box-shadow .25s; }
.case-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.case-top { padding: 24px 26px; background: var(--gradient-soft); border-bottom: 1px solid var(--slate-200); }
.case-top .ind { font-size: 13px; font-weight: 700; color: var(--blue-600); }
.case-top h3 { font-size: 19px; margin-top: 4px; }
.case-body { padding: 24px 26px; }
.case-body .pain { font-size: 14px; color: var(--slate-500); margin-bottom: 12px; }
.case-body .sol { font-size: 14px; margin-bottom: 16px; }
.case-body .sol b { color: var(--slate-800); }
.case-metrics { display: flex; gap: 14px; flex-wrap: wrap; margin: 8px 0 16px; }
.metric { flex: 1; min-width: 90px; background: var(--slate-50); border-radius: var(--radius-sm); padding: 12px 14px; text-align: center; }
.metric .m-num { font-size: 22px; font-weight: 800; color: var(--blue-600); }
.metric .m-label { font-size: 12px; color: var(--slate-500); }
.case-quote { font-size: 14px; font-style: italic; color: var(--slate-600); border-left: 3px solid var(--blue-200); padding-left: 12px; }

/* ---------------- 行业 ---------------- */
.industry-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.industry { background: #fff; border: 1px solid var(--slate-200); border-radius: var(--radius-sm); padding: 22px; text-align: center; transition: all .25s; }
.industry:hover { border-color: var(--blue-300); transform: translateY(-3px); box-shadow: var(--shadow-md); }
.industry .emoji { font-size: 34px; }
.industry .name { font-weight: 700; color: var(--slate-800); margin-top: 8px; }

/* ---------------- FAQ ---------------- */
.faq-list { max-width: 860px; margin: 0 auto; }
.faq-item { border: 1px solid var(--slate-200); border-radius: var(--radius-sm); margin-bottom: 14px; background: #fff; overflow: hidden; transition: border-color .2s; }
.faq-item.open { border-color: var(--blue-300); box-shadow: var(--shadow-sm); }
.faq-q { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 18px 22px; cursor: pointer; font-weight: 600; color: var(--slate-900); font-size: 16px; }
.faq-q .ic { flex: none; width: 26px; height: 26px; border-radius: 50%; background: var(--blue-50); color: var(--blue-600); display: grid; place-items: center; transition: transform .3s; font-weight: 700; }
.faq-item.open .faq-q .ic { transform: rotate(45deg); background: var(--gradient); color: #fff; }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-a-inner { padding: 0 22px 20px; color: var(--slate-600); font-size: 15px; }

/* FAQ 汇总页双栏 */
.faq-layout { display: grid; grid-template-columns: 260px 1fr; gap: 36px; align-items: start; }
.faq-nav { position: sticky; top: 92px; background: #fff; border: 1px solid var(--slate-200); border-radius: var(--radius); padding: 18px; }
.faq-nav h4 { font-size: 14px; color: var(--slate-400); margin: 14px 0 8px; text-transform: uppercase; letter-spacing: .5px; }
.faq-nav h4:first-child { margin-top: 0; }
.faq-nav a { display: block; padding: 9px 12px; border-radius: 8px; color: var(--slate-600); font-size: 14px; transition: all .2s; }
.faq-nav a:hover, .faq-nav a.active { background: var(--blue-50); color: var(--blue-700); font-weight: 600; }
.faq-group { margin-bottom: 40px; }
.faq-group > h3 { font-size: 22px; margin-bottom: 18px; padding-bottom: 10px; border-bottom: 2px solid var(--blue-100); }

/* ---------------- 流程 ---------------- */
.steps { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; counter-reset: step; }
.step-card { background: #fff; border: 1px solid var(--slate-200); border-radius: var(--radius-sm); padding: 22px 16px; text-align: center; position: relative; }
.step-card .n { width: 38px; height: 38px; margin: 0 auto 12px; border-radius: 50%; background: var(--gradient); color: #fff; display: grid; place-items: center; font-weight: 800; }
.step-card h4 { font-size: 15px; margin-bottom: 6px; }
.step-card p { font-size: 13px; color: var(--slate-500); }

/* ---------------- CTA 区 ---------------- */
.cta-band {
  background: var(--gradient); color: #fff; border-radius: var(--radius-lg);
  padding: 56px 48px; text-align: center; position: relative; overflow: hidden;
}
.cta-band::before { content:""; position:absolute; inset:0; background-image: linear-gradient(rgba(255,255,255,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.08) 1px,transparent 1px); background-size:40px 40px; opacity:.5; }
.cta-band .inner { position: relative; z-index: 1; }
.cta-band h2 { color: #fff; font-size: 30px; margin-bottom: 12px; }
.cta-band p { color: rgba(255,255,255,.9); font-size: 17px; margin-bottom: 26px; }
.cta-band .btn-primary { background: #fff; color: var(--blue-700); box-shadow: 0 10px 30px -8px rgba(0,0,0,.3); }
.cta-band .btn-primary:hover { background: var(--slate-50); }

/* ---------------- 面包屑 ---------------- */
.breadcrumb { padding: 18px 0; font-size: 14px; color: var(--slate-400); background: var(--slate-50); }
.breadcrumb a:hover { color: var(--blue-600); }
.breadcrumb span.sep { margin: 0 8px; }

/* ---------------- 内容区块（服务页/关于页正文） ---------------- */
.page-hero { background: var(--gradient-soft); border-bottom: 1px solid var(--slate-200); padding: 64px 0 56px; }
.page-hero .eyebrow { display:inline-block; font-size:13px; font-weight:700; color:var(--blue-600); background:#fff; border:1px solid var(--blue-100); padding:5px 14px; border-radius:999px; margin-bottom:16px; }
.page-hero h1 { font-size: 40px; margin-bottom: 14px; }
.page-hero p { font-size: 18px; color: var(--slate-600); max-width: 720px; }
.page-hero .tags { display:flex; gap:10px; flex-wrap:wrap; margin-top:22px; }
.page-hero .tag { background:#fff; border:1px solid var(--slate-200); border-radius:999px; padding:7px 16px; font-size:14px; color:var(--slate-600); }

.prose { max-width: 820px; margin: 0 auto; }
.prose p { margin-bottom: 16px; color: var(--slate-600); }
.prose h3 { font-size: 22px; margin: 34px 0 14px; }

.feature-list li { display: flex; gap: 12px; margin-bottom: 12px; color: var(--slate-600); }
.feature-list li::before { content: "✓"; color: var(--blue-600); font-weight: 800; flex: none; }

/* ---------------- 联系页 ---------------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: start; }
.contact-info .row { display: flex; gap: 14px; padding: 16px 0; border-bottom: 1px solid var(--slate-200); }
.contact-info .row .ic { width: 42px; height: 42px; border-radius: 10px; background: var(--gradient-soft); display: grid; place-items: center; color: var(--blue-600); font-size: 20px; flex: none; }
.contact-info .row .k { font-size: 13px; color: var(--slate-400); }
.contact-info .row .v { font-size: 16px; color: var(--slate-900); font-weight: 600; }
.map-placeholder { height: 280px; border-radius: var(--radius); border: 1px dashed var(--blue-300); background: var(--slate-50); display: grid; place-items: center; color: var(--slate-400); text-align: center; }

.form-card { background: #fff; border: 1px solid var(--slate-200); border-radius: var(--radius); padding: 30px; box-shadow: var(--shadow-sm); }
.form-card label { display: block; font-size: 14px; font-weight: 600; color: var(--slate-700); margin: 14px 0 6px; }
.form-card input, .form-card textarea, .form-card select {
  width: 100%; padding: 12px 14px; border: 1.5px solid var(--slate-200); border-radius: var(--radius-sm);
  font-family: inherit; font-size: 15px; color: var(--slate-800); background: #fff; transition: border-color .2s;
}
.form-card input:focus, .form-card textarea:focus, .form-card select:focus { outline: none; border-color: var(--blue-500); }
.form-card textarea { resize: vertical; min-height: 110px; }
.form-note { font-size: 13px; color: var(--slate-400); margin-top: 14px; }

/* ---------------- 企业微信获客卡片 ---------------- */
.qywx-card { background: linear-gradient(135deg, #0c447c 0%, #185fa5 100%); color: #fff; border-radius: var(--radius); padding: 32px; text-align: center; box-shadow: var(--shadow-lg); }
.qywx-badge { display: inline-block; font-size: 12px; font-weight: 700; background: rgba(255,255,255,.16); border: 1px solid rgba(255,255,255,.3); padding: 5px 14px; border-radius: 999px; margin-bottom: 14px; }
.qywx-card h3 { color: #fff; font-size: 21px; margin-bottom: 8px; }
.qywx-sub { color: rgba(255,255,255,.85); font-size: 14px; margin-bottom: 18px; }
.qywx-btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; width: 100%; background: #fff; color: #0c447c; font-weight: 700; font-size: 16px; padding: 14px 20px; border-radius: 999px; text-decoration: none; box-shadow: 0 10px 26px -10px rgba(0,0,0,.4); transition: transform .2s; }
.qywx-btn:hover { transform: translateY(-2px); }
.qywx-qr-wrap { margin-top: 22px; background: #fff; border-radius: 14px; padding: 16px; display: inline-block; }
.qywx-qr { width: 172px; height: 172px; display: block; margin: 0 auto; }
.qywx-qr-tip { color: #0c447c; font-size: 13px; font-weight: 600; margin-top: 10px; }
.qywx-meta { font-size: 12px; color: rgba(255,255,255,.72); margin-top: 14px; }

/* 全站悬浮企业微信按钮 */
.qywx-fab { position: fixed; right: 22px; bottom: 22px; z-index: 95; display: inline-flex; align-items: center; gap: 8px; background: linear-gradient(135deg, #0c447c, #185fa5); color: #fff; font-weight: 700; font-size: 15px; padding: 13px 20px; border-radius: 999px; text-decoration: none; box-shadow: 0 12px 30px -8px rgba(12,68,124,.6); transition: transform .25s; }
.qywx-fab:hover { transform: translateY(-3px); }
.qywx-fab .dot { width: 8px; height: 8px; border-radius: 50%; background: #4ade80; box-shadow: 0 0 0 4px rgba(74,222,128,.25); }
@media (max-width: 720px) { .qywx-fab { padding: 12px 16px; font-size: 14px; } }

/* 服务区域（广西14市） */
.region-grid { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 8px; }
.region-tag { display: inline-flex; align-items: center; justify-content: center; padding: 10px 18px; background: var(--white); border: 1px solid var(--slate-200); border-radius: 999px; font-size: 15px; font-weight: 600; color: var(--slate-700); box-shadow: var(--shadow-sm); }
.region-tag.hq { background: var(--gradient); color: #fff; border-color: transparent; }

/* ---------------- 页脚 ---------------- */
.site-footer { background: var(--slate-900); color: var(--slate-300); padding: 60px 0 24px; margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 36px; margin-bottom: 40px; }
.footer-brand .brand { color: #fff; margin-bottom: 14px; }
.footer-brand p { font-size: 14px; color: var(--slate-400); max-width: 320px; }
.footer-col h4 { color: #fff; font-size: 16px; margin-bottom: 16px; }
.footer-col a { display: block; padding: 6px 0; font-size: 14px; color: var(--slate-400); transition: color .2s; }
.footer-col a:hover { color: var(--cyan-400); }
.footer-contact .row { font-size: 14px; color: var(--slate-400); padding: 5px 0; }
.footer-contact .row b { color: var(--slate-200); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding-top: 22px; font-size: 13px; color: var(--slate-500); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.footer-bottom a { color: var(--slate-400); }
.footer-bottom a:hover { color: var(--cyan-400); }

/* ---------------- 时间轴 ---------------- */
.timeline { max-width: 880px; margin: 0 auto; position: relative; padding-left: 28px; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px; background: var(--blue-200); }
.timeline-item { position: relative; padding: 0 0 28px 22px; }
.timeline-item::before { content: ""; position: absolute; left: -28px; top: 6px; width: 16px; height: 16px; border-radius: 50%; background: var(--gradient); border: 3px solid #fff; box-shadow: 0 0 0 2px var(--blue-200); }
.timeline-item .year { font-weight: 800; color: var(--blue-700); font-size: 17px; }
.timeline-item .desc { color: var(--slate-500); font-size: 15px; }

/* 价值/服务行业标语 */
.values { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.value-card { background: #fff; border: 1px solid var(--slate-200); border-radius: var(--radius-sm); padding: 22px; text-align: center; }
.value-card .v-ic { font-size: 30px; }
.value-card h4 { font-size: 16px; margin: 8px 0 4px; }
.value-card p { font-size: 13px; color: var(--slate-500); }

.team-note { max-width: 820px; margin: 0 auto; text-align: center; color: var(--slate-600); font-size: 17px; }

/* ---------------- 返回顶部 ---------------- */
.to-top {
  position: fixed; right: 22px; bottom: 84px; width: 46px; height: 46px; border-radius: 50%;
  background: var(--gradient); color: #fff; display: grid; place-items: center; cursor: pointer;
  box-shadow: var(--shadow-lg); opacity: 0; pointer-events: none; transition: opacity .3s, transform .3s; z-index: 90; font-size: 20px;
}
.to-top.show { opacity: 1; pointer-events: auto; }
.to-top:hover { transform: translateY(-3px); }

/* ---------------- 响应式 ---------------- */
@media (max-width: 980px) {
  .stats { grid-template-columns: repeat(2, 1fr); }
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .industry-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .faq-layout { grid-template-columns: 1fr; }
  .faq-nav { position: static; display: flex; flex-wrap: wrap; gap: 6px; }
  .faq-nav h4 { display: none; }
  .faq-nav a { padding: 8px 12px; background: var(--slate-100); }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .nav-links, .nav-cta .btn-outline { display: none; }
  .nav-toggle { display: block; }
  .nav-links.open {
    display: flex; flex-direction: column; position: absolute; top: 68px; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--slate-200); padding: 12px 20px; gap: 4px; box-shadow: var(--shadow-md);
  }
  .nav-links.open a { padding: 12px 14px; }
  .hero h1 { font-size: 32px; }
  .hero p.lead { font-size: 16px; }
  .section { padding: 60px 0; }
  .section-head h2 { font-size: 26px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .values { grid-template-columns: 1fr 1fr; }
  .stats { grid-template-columns: 1fr 1fr; gap: 14px; }
  .steps { grid-template-columns: 1fr 1fr; }
  .industry-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-band { padding: 40px 24px; }
  .cta-band h2 { font-size: 24px; }
  .page-hero h1 { font-size: 30px; }
}

/* ---------------- 资质背书 ---------------- */
.hero-creds { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.hero-creds .cred {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; font-weight: 600; color: var(--slate-700);
  background: rgba(255,255,255,.72); border: 1px solid var(--slate-200);
  padding: 6px 12px; border-radius: 999px;
}
.cred-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 30px; }
.cred-card {
  background: #fff; border: 1px solid var(--slate-200); border-radius: 16px;
  padding: 28px 24px; text-align: center; box-shadow: var(--shadow-sm);
}
.cred-card .cred-ic { font-size: 38px; margin-bottom: 12px; }
.cred-card h3 { font-size: 17px; margin-bottom: 10px; }
.cred-card p { font-size: 14px; color: var(--slate-500); line-height: 1.7; }
@media (max-width: 720px) { .cred-grid { grid-template-columns: 1fr; } }