/* =========================================================
   北京聚力知行科技有限公司 · 企业官网样式
   设计语言：科技蓝（深蓝 + 蓝紫 / 青色渐变）
   ========================================================= */

:root {
  /* 主色板 */
  --c-navy: #0a1f44;
  --c-navy-2: #0e2a5e;
  --c-blue: #1e6fff;
  --c-blue-2: #2d7ff9;
  --c-cyan: #00c2ff;
  --c-accent: #5b8cff;
  --c-grad: linear-gradient(120deg, #1e6fff 0%, #00c2ff 100%);
  --c-grad-soft: linear-gradient(135deg, #1e6fff 0%, #5b8cff 50%, #00c2ff 100%);

  /* 中性色 */
  --c-bg: #ffffff;
  --c-bg-soft: #f4f7fc;
  --c-bg-dark: #071634;
  --c-text: #1a2440;
  --c-text-soft: #5a6685;
  --c-border: #e3e9f4;
  --c-white: #ffffff;

  /* 阴影与圆角 */
  --shadow-sm: 0 4px 16px rgba(14, 42, 94, 0.08);
  --shadow-md: 0 12px 40px rgba(14, 42, 94, 0.12);
  --shadow-lg: 0 24px 60px rgba(14, 42, 94, 0.18);
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;

  --maxw: 1200px;
  --nav-h: 72px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; transition: color .2s; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------------- 按钮 ---------------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 28px; border-radius: 999px; font-size: 15px; font-weight: 600;
  cursor: pointer; border: none; transition: transform .2s, box-shadow .2s, background .2s;
  white-space: nowrap;
}
.btn-primary { background: var(--c-grad); color: #fff; box-shadow: 0 8px 24px rgba(30,111,255,.35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(30,111,255,.45); }
.btn-ghost { background: rgba(255,255,255,.12); color: #fff; border: 1px solid rgba(255,255,255,.35); }
.btn-ghost:hover { background: rgba(255,255,255,.22); }
.btn-outline { background: transparent; color: var(--c-blue); border: 1.5px solid var(--c-blue); }
.btn-outline:hover { background: var(--c-blue); color: #fff; }

/* ---------------- 导航 ---------------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; height: var(--nav-h); z-index: 100;
  display: flex; align-items: center;
  background: rgba(255,255,255,.85); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--c-border);
  transition: background .3s, box-shadow .3s;
}
.nav.scrolled { box-shadow: var(--shadow-sm); }
.nav .container { display: flex; align-items: center; justify-content: space-between; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 19px; color: var(--c-navy); }
.logo .mark {
  width: 38px; height: 38px; border-radius: 11px; background: var(--c-grad);
  display: grid; place-items: center; color: #fff; font-size: 18px; font-weight: 900;
  box-shadow: 0 6px 18px rgba(30,111,255,.4);
}
.logo small { display: block; font-size: 11px; font-weight: 500; color: var(--c-text-soft); letter-spacing: 1px; }

.nav-links { display: flex; align-items: center; gap: 34px; }
.nav-links a { font-size: 15px; font-weight: 500; color: var(--c-text); position: relative; }
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: -6px; width: 0; height: 2px;
  background: var(--c-grad); transition: width .25s;
}
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-links a:hover, .nav-links a.active { color: var(--c-blue); }

.nav-cta { display: flex; align-items: center; gap: 14px; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; }
.nav-toggle span { width: 24px; height: 2px; background: var(--c-navy); transition: .3s; }

/* ---------------- 区块通用 ---------------- */
.section { padding: 96px 0; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head .eyebrow {
  display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: 2px;
  color: var(--c-blue); text-transform: uppercase; margin-bottom: 14px;
}
.section-head h2 { font-size: 36px; font-weight: 800; color: var(--c-navy); line-height: 1.3; }
.section-head p { margin-top: 16px; color: var(--c-text-soft); font-size: 16px; }

.bg-soft { background: var(--c-bg-soft); }
.bg-dark {
  background: radial-gradient(1200px 600px at 70% -10%, #13357a 0%, transparent 60%),
              linear-gradient(180deg, var(--c-navy) 0%, var(--c-bg-dark) 100%);
  color: #fff;
}
.bg-dark .section-head h2 { color: #fff; }
.bg-dark .section-head p { color: rgba(255,255,255,.7); }

/* ---------------- Hero ---------------- */
.hero {
  position: relative; padding: calc(var(--nav-h) + 90px) 0 110px;
  background:
    radial-gradient(900px 500px at 85% 10%, rgba(0,194,255,.35) 0%, transparent 55%),
    radial-gradient(700px 500px at 10% 90%, rgba(30,111,255,.4) 0%, transparent 55%),
    linear-gradient(160deg, #0a1f44 0%, #0e2a5e 55%, #071634 100%);
  color: #fff; overflow: hidden;
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 46px 46px; mask-image: radial-gradient(circle at 50% 40%, #000 30%, transparent 75%);
  pointer-events: none;
}
.hero .container { position: relative; z-index: 2; }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items: center; }
.hero-tag {
  display: inline-flex; align-items: center; gap: 8px; padding: 7px 16px; border-radius: 999px;
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.2);
  font-size: 13px; color: #cfe0ff; margin-bottom: 22px;
}
.hero-tag .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--c-cyan); box-shadow: 0 0 10px var(--c-cyan); }
.hero h1 { font-size: 50px; font-weight: 800; line-height: 1.18; letter-spacing: .5px; }
.hero h1 .grad { background: linear-gradient(90deg, #6ea8ff, #00c2ff); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { margin: 24px 0 34px; font-size: 18px; color: rgba(255,255,255,.82); max-width: 540px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 40px; margin-top: 56px; flex-wrap: wrap; }
.hero-stats .item .num { font-size: 34px; font-weight: 800; background: linear-gradient(90deg,#6ea8ff,#00c2ff); -webkit-background-clip:text; background-clip:text; color: transparent; }
.hero-stats .item .label { font-size: 14px; color: rgba(255,255,255,.65); }

/* Hero 右侧可视化卡片 */
.hero-visual { position: relative; }
.hero-card {
  background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.16);
  border-radius: var(--radius-lg); padding: 26px; backdrop-filter: blur(10px);
  box-shadow: var(--shadow-lg);
}
.hero-card h4 { font-size: 16px; margin-bottom: 18px; color: #dbe7ff; display:flex; align-items:center; gap:8px;}
.bars { display: flex; align-items: flex-end; gap: 14px; height: 150px; padding-top: 10px; }
.bars .bar { flex: 1; border-radius: 8px 8px 0 0; background: var(--c-grad-soft); opacity: .9; animation: grow 1.4s ease both; }
@keyframes grow { from { height: 0 !important; } }
.ring-wrap { display:flex; align-items:center; gap:18px; margin-top:22px; }
.ring { width: 70px; height: 70px; }
.mini-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 18px; }
.mini-stats div { background: rgba(255,255,255,.06); border-radius: 12px; padding: 12px; }
.mini-stats .v { font-size: 18px; font-weight: 700; color: #fff; }
.mini-stats .k { font-size: 12px; color: rgba(255,255,255,.6); }

/* ---------------- 客户 logo 条 ---------------- */
.trust { padding: 40px 0; background: var(--c-bg-soft); }
.trust .container { display: flex; align-items: center; gap: 40px; flex-wrap: wrap; justify-content: center; }
.trust .label { font-size: 14px; color: var(--c-text-soft); }
.trust .logos { display: flex; gap: 40px; flex-wrap: wrap; align-items: center; }
.trust .logos span { font-weight: 700; color: #9aa6c4; font-size: 17px; letter-spacing: .5px; }

/* ---------------- 卡片网格 ---------------- */
.grid { display: grid; gap: 28px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius);
  padding: 32px; transition: transform .3s, box-shadow .3s, border-color .3s; height: 100%;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }
.card .icon {
  width: 56px; height: 56px; border-radius: 14px; background: linear-gradient(135deg, rgba(30,111,255,.12), rgba(0,194,255,.12));
  display: grid; place-items: center; margin-bottom: 20px; color: var(--c-blue);
}
.card h3 { font-size: 20px; color: var(--c-navy); margin-bottom: 12px; }
.card p { color: var(--c-text-soft); font-size: 15px; }
.card .more { display:inline-block; margin-top: 16px; color: var(--c-blue); font-weight: 600; font-size: 14px; }

/* 特性（带序号） */
.feature { display: flex; gap: 18px; }
.feature .idx {
  flex: 0 0 46px; width: 46px; height: 46px; border-radius: 12px; background: var(--c-grad);
  color: #fff; font-weight: 800; display: grid; place-items: center; font-size: 18px;
}
.feature h3 { font-size: 18px; color: var(--c-navy); margin-bottom: 6px; }

/* ---------------- 流程步骤 ---------------- */
.steps { display: grid; grid-template-columns: repeat(4,1fr); gap: 22px; position: relative; }
.step { background:#fff; border:1px solid var(--c-border); border-radius: var(--radius); padding: 28px 24px; position: relative; }
.step .n { font-size: 40px; font-weight: 800; color: rgba(30,111,255,.18); line-height: 1; }
.step h4 { color: var(--c-navy); margin: 10px 0 8px; font-size: 17px; }
.step p { color: var(--c-text-soft); font-size: 14px; }

/* ---------------- 数据指标带 ---------------- */
.metrics { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; text-align: center; }
.metric .num { font-size: 46px; font-weight: 800; background: linear-gradient(90deg,#6ea8ff,#00c2ff); -webkit-background-clip:text; background-clip:text; color: transparent; }
.metric .label { margin-top: 8px; color: rgba(255,255,255,.75); font-size: 15px; }

/* ---------------- 解决方案 tabs ---------------- */
.tabs { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-bottom: 40px; }
.tab {
  padding: 11px 24px; border-radius: 999px; border: 1px solid var(--c-border); background: #fff;
  font-weight: 600; color: var(--c-text-soft); cursor: pointer; transition: .25s; font-size: 15px;
}
.tab.active, .tab:hover { background: var(--c-grad); color: #fff; border-color: transparent; box-shadow: 0 8px 22px rgba(30,111,255,.3); }
.tab-pane { display: none; }
.tab-pane.active { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.tab-pane .visual { background: linear-gradient(135deg, #0e2a5e, #1e6fff); border-radius: var(--radius-lg); min-height: 320px; padding: 36px; color:#fff; display:flex; flex-direction:column; justify-content:center; }
.tab-pane h3 { font-size: 26px; color: var(--c-navy); margin-bottom: 16px; }
.tab-pane ul.feat-list li { display:flex; gap:10px; margin-bottom: 12px; color: var(--c-text); }
.tab-pane ul.feat-list li::before { content:"✓"; color: var(--c-blue); font-weight:800; }

/* ---------------- 关于页 timeline ---------------- */
.timeline { position: relative; max-width: 820px; margin: 0 auto; padding-left: 36px; }
.timeline::before { content:""; position:absolute; left: 9px; top: 8px; bottom: 8px; width: 2px; background: linear-gradient(var(--c-blue), var(--c-cyan)); }
.timeline .tl-item { position: relative; padding: 0 0 36px 30px; }
.timeline .tl-item::before { content:""; position:absolute; left: -31px; top: 4px; width: 18px; height: 18px; border-radius:50%; background:#fff; border: 4px solid var(--c-blue); }
.timeline .tl-item .year { font-weight: 800; color: var(--c-blue); font-size: 16px; }
.timeline .tl-item h4 { color: var(--c-navy); font-size: 18px; margin: 4px 0 6px; }
.timeline .tl-item p { color: var(--c-text-soft); font-size: 15px; }

.value-grid .card { text-align: center; }
.value-grid .card .icon { margin: 0 auto 18px; }

/* ---------------- 产品页 ---------------- */
.product-hero { background: var(--c-bg-soft); border-radius: var(--radius-lg); padding: 40px; display:flex; gap: 28px; align-items:center; margin-bottom: 40px; }
.product-hero .ph-icon { flex:0 0 90px; width:90px; height:90px; border-radius: 22px; background: var(--c-grad); display:grid; place-items:center; color:#fff; }
.product-hero h3 { font-size: 24px; color: var(--c-navy); }
.product-hero p { color: var(--c-text-soft); margin-top: 8px; }
.prod-card { display:flex; flex-direction:column; }
.prod-card .tag { align-self:flex-start; font-size:12px; font-weight:700; color: var(--c-blue); background: rgba(30,111,255,.1); padding: 4px 12px; border-radius: 999px; margin-bottom: 14px; }
.prod-card ul.ticks li { display:flex; gap:8px; font-size:14px; color: var(--c-text-soft); margin-top:8px; }
.prod-card ul.ticks li::before { content:"●"; color: var(--c-cyan); font-size:10px; transform: translateY(2px); }

/* ---------------- 新闻页 ---------------- */
.news-grid { display:grid; grid-template-columns: repeat(3,1fr); gap: 28px; }
.news-card { border:1px solid var(--c-border); border-radius: var(--radius); overflow:hidden; background:#fff; transition:.3s; display:flex; flex-direction:column; }
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.news-card .thumb { height: 180px; background: var(--c-grad-soft); display:grid; place-items:center; color:#fff; font-size: 40px; }
.news-card .body { padding: 22px; flex:1; display:flex; flex-direction:column; }
.news-card .date { font-size: 13px; color: var(--c-text-soft); }
.news-card h3 { font-size: 18px; color: var(--c-navy); margin: 8px 0 10px; }
.news-card p { font-size: 14px; color: var(--c-text-soft); flex:1; }
.news-card .more { margin-top: 14px; color: var(--c-blue); font-weight:600; font-size:14px; }

/* ---------------- 联系页 ---------------- */
.contact-grid { display:grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items:start; }
.contact-info .item { display:flex; gap:16px; margin-bottom: 26px; }
.contact-info .item .ci { flex:0 0 48px; width:48px; height:48px; border-radius:12px; background: linear-gradient(135deg, rgba(30,111,255,.12), rgba(0,194,255,.12)); display:grid; place-items:center; color: var(--c-blue); }
.contact-info .item h4 { color: var(--c-navy); font-size:16px; }
.contact-info .item p { color: var(--c-text-soft); font-size:15px; }
.form-card { background:#fff; border:1px solid var(--c-border); border-radius: var(--radius); padding: 34px; box-shadow: var(--shadow-sm); }
.form-card h3 { color: var(--c-navy); font-size: 22px; margin-bottom: 22px; }
.field { margin-bottom: 18px; }
.field label { display:block; font-size: 14px; font-weight:600; color: var(--c-text); margin-bottom: 8px; }
.field input, .field textarea, .field select {
  width:100%; padding: 12px 14px; border:1px solid var(--c-border); border-radius: 10px;
  font-size: 15px; font-family: inherit; color: var(--c-text); background:#fff; transition: border .2s, box-shadow .2s;
}
.field input:focus, .field textarea:focus, .field select:focus { outline:none; border-color: var(--c-blue); box-shadow: 0 0 0 3px rgba(30,111,255,.12); }
.field textarea { resize: vertical; min-height: 120px; }
.form-note { font-size: 13px; color: var(--c-text-soft); margin-top: 10px; }

.map { height: 280px; border-radius: var(--radius); overflow:hidden; margin-top: 24px; border:1px solid var(--c-border); background:
  linear-gradient(135deg,#0e2a5e,#1e6fff); display:grid; place-items:center; color:#fff; }

/* ---------------- CTA ---------------- */
.cta { text-align:center; }
.cta-box {
  background: var(--c-grad); border-radius: var(--radius-lg); padding: 64px 40px; color:#fff;
  box-shadow: var(--shadow-lg); position: relative; overflow:hidden;
}
.cta-box::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; }
.cta-box h2 { font-size: 34px; font-weight: 800; position:relative; }
.cta-box p { margin: 16px auto 30px; max-width: 560px; opacity:.9; position:relative; }
.cta-box .btn-ghost { position:relative; }

/* ---------------- 页脚 ---------------- */
.footer { background: var(--c-bg-dark); color: rgba(255,255,255,.7); padding: 64px 0 28px; }
.footer-grid { display:grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; }
.footer .logo { color:#fff; margin-bottom: 16px; }
.footer .about { font-size: 14px; line-height: 1.8; max-width: 320px; }
.footer h5 { color:#fff; font-size: 15px; margin-bottom: 18px; }
.footer ul li { margin-bottom: 10px; font-size: 14px; }
.footer ul li a:hover { color: var(--c-cyan); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); margin-top: 40px; padding-top: 22px; display:flex; justify-content: space-between; flex-wrap:wrap; gap: 10px; font-size: 13px; }
.footer-bottom a { color: rgba(255,255,255,.7); text-decoration: underline; text-underline-offset: 3px; transition: color .2s; }
.footer-bottom a:hover { color: var(--c-cyan); }
.tm-note { font-size: 12px; color: rgba(255,255,255,.5); text-align: center; margin-top: 26px; line-height: 1.6; }
.tpl-banner { background: rgba(255,170,0,.12); border: 1px solid rgba(255,170,0,.4); color: #a9780a; padding: 12px 16px; border-radius: 10px; font-size: 14px; margin-bottom: 30px; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .grid-3, .grid-4 { grid-template-columns: repeat(2,1fr); }
  .news-grid { grid-template-columns: repeat(2,1fr); }
  .metrics { grid-template-columns: repeat(2,1fr); }
  .steps { grid-template-columns: repeat(2,1fr); }
  .tab-pane.active { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .nav-links, .nav-cta .btn-outline { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.open {
    display:flex; flex-direction:column; position:absolute; top: var(--nav-h); left:0; right:0;
    background:#fff; padding: 20px 24px; gap: 18px; box-shadow: var(--shadow-md); border-top:1px solid var(--c-border);
  }
  .hero h1 { font-size: 34px; }
  .section { padding: 64px 0; }
  .section-head h2 { font-size: 27px; }
  .grid-3, .grid-4, .news-grid, .grid-2 { grid-template-columns: 1fr; }
  .metrics { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr; }
  .hero-stats { gap: 28px; }
  .product-hero { flex-direction: column; text-align:center; }
}

/* 进入动画 */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }