/* ==========================================================================
   千贝网络有限公司 官网样式  |  qianbei.ai
   ========================================================================== */

:root {
  --navy: #0a2540;
  --navy-2: #123a63;
  --primary: #1f6feb;
  --primary-dark: #175bc7;
  --accent: #17c3b2;
  --bg: #f7f9fc;
  --surface: #ffffff;
  --text: #1c2b3a;
  --text-soft: #55677c;
  --line: #e3e9f2;
  --shadow: 0 10px 30px rgba(10, 37, 64, .08);
  --radius: 14px;
  --maxw: 1140px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

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

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }

.brand-logo {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 800;
  letter-spacing: -1px;
}

.brand-name { font-size: 18px; color: var(--navy); }
.brand-name small { display: block; font-size: 11px; font-weight: 500; color: var(--text-soft); letter-spacing: .5px; }

.nav-links { display: flex; gap: 8px; align-items: center; }
.nav-links a {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 15px;
  color: var(--text-soft);
  transition: all .2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--primary); background: #eef4ff; }

.nav-cta {
  margin-left: 12px;
  background: var(--primary);
  color: #fff !important;
  padding: 9px 20px !important;
  border-radius: 999px;
  font-weight: 600;
}
.nav-cta:hover { background: var(--primary-dark); }

@media (max-width: 760px) {
  .nav-links a:not(.nav-cta) { display: none; }
}

/* ---------- 语言切换器 ---------- */
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  margin-left: 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px;
  font-size: 13px;
  flex: 0 0 auto;
}
.lang-switch span, .lang-switch a {
  padding: 4px 12px;
  border-radius: 999px;
  white-space: nowrap;
}
.lang-switch span {
  background: #eef4ff;
  color: var(--primary-dark);
  font-weight: 600;
}
.lang-switch a { color: var(--text-soft); transition: color .2s; }
.lang-switch a:hover { color: var(--primary); }

/* ---------- Hero ---------- */
.hero {
  background:
    radial-gradient(900px 420px at 85% -10%, rgba(23, 195, 178, .18), transparent 60%),
    radial-gradient(700px 380px at 5% 110%, rgba(31, 111, 235, .16), transparent 60%),
    linear-gradient(160deg, #0a2540 0%, #123a63 55%, #175bc7 130%);
  color: #fff;
  padding: 96px 0 110px;
  overflow: hidden;
  position: relative;
}

.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: center; }
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } }

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255, 255, 255, .12);
  border: 1px solid rgba(255, 255, 255, .25);
  padding: 6px 14px; border-radius: 999px;
  font-size: 13px; color: #d7ecff;
  margin-bottom: 22px;
}
.hero-badge .dot { width: 8px; height: 8px; border-radius: 50%; background: #2ee6c8; box-shadow: 0 0 8px #2ee6c8; }

.hero h1 { font-size: 44px; line-height: 1.25; font-weight: 800; letter-spacing: 1px; }
.hero h1 em { font-style: normal; color: #6fd7ff; }
.hero p.lead { margin: 20px 0 34px; font-size: 17px; color: #c9d9ec; max-width: 540px; }

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  transition: all .2s;
  border: 1px solid transparent;
}
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 8px 20px rgba(31, 111, 235, .35); }
.btn-primary:hover { transform: translateY(-2px); background: var(--primary-dark); }
.btn-ghost { border-color: rgba(255, 255, 255, .4); color: #fff; }
.btn-ghost:hover { background: rgba(255, 255, 255, .1); }
.btn-dark { background: var(--navy); color: #fff; }
.btn-dark:hover { background: var(--navy-2); transform: translateY(-2px); }

/* 芯片装饰图形 */
.chip-card {
  background: rgba(255, 255, 255, .07);
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 20px;
  padding: 30px;
  backdrop-filter: blur(6px);
}
.chip-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.chip-cell {
  background: linear-gradient(150deg, rgba(255,255,255,.14), rgba(255,255,255,.04));
  border: 1px solid rgba(255, 255, 255, .2);
  border-radius: 12px;
  padding: 18px 10px;
  text-align: center;
  font-size: 12px;
  color: #bcd6f2;
}
.chip-cell strong { display: block; font-size: 17px; color: #fff; margin-bottom: 4px; }
.chip-foot { margin-top: 18px; text-align: center; font-size: 12px; color: #9db8d6; letter-spacing: 2px; }

/* ---------- 通用区块 ---------- */
.section { padding: 84px 0; }
.section.alt { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.section-head { max-width: 640px; margin: 0 auto 48px; text-align: center; }
.section-head .kicker { color: var(--primary); font-weight: 700; font-size: 14px; letter-spacing: 3px; text-transform: uppercase; }
.section-head h2 { font-size: 32px; color: var(--navy); margin: 10px 0 14px; font-weight: 800; letter-spacing: 1px; }
.section-head p { color: var(--text-soft); font-size: 16px; }

/* ---------- 数字统计 ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
@media (max-width: 900px) { .stats { grid-template-columns: repeat(2, 1fr); } }
.stat {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
  box-shadow: var(--shadow);
}
.stat .num { font-size: 34px; font-weight: 800; color: var(--primary); }
.stat .num span { font-size: 20px; }
.stat .label { font-size: 14px; color: var(--text-soft); margin-top: 4px; }

/* ---------- 卡片 ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
@media (max-width: 900px) { .grid-3, .grid-2 { grid-template-columns: 1fr; } }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
  transition: transform .25s, box-shadow .25s;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 16px 40px rgba(10, 37, 64, .12); }

.card .icon {
  width: 52px; height: 52px;
  border-radius: 13px;
  display: flex; align-items: center; justify-content: center;
  font-size: 24px;
  background: #eaf2ff;
  margin-bottom: 18px;
}
.card h3 { font-size: 19px; color: var(--navy); margin-bottom: 10px; }
.card p { font-size: 14.5px; color: var(--text-soft); }
.card .more { display: inline-block; margin-top: 14px; font-size: 14px; font-weight: 600; color: var(--primary); }

/* ---------- 合作伙伴 ---------- */
.partner-band {
  background: linear-gradient(135deg, #0a2540, #123a63);
  color: #fff;
  border-radius: 22px;
  padding: 52px;
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 44px;
  align-items: center;
  position: relative;
  overflow: hidden;
}
.partner-band::after {
  content: "";
  position: absolute; right: -80px; top: -80px;
  width: 260px; height: 260px; border-radius: 50%;
  background: radial-gradient(circle, rgba(23,195,178,.35), transparent 70%);
}
@media (max-width: 900px) { .partner-band { grid-template-columns: 1fr; padding: 36px; } }

.partner-band .tag {
  display: inline-block;
  background: rgba(255,255,255,.14);
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 999px;
  padding: 4px 14px;
  font-size: 13px;
  margin-bottom: 16px;
  color: #bfe9ff;
}
.partner-band h2 { font-size: 30px; margin-bottom: 14px; letter-spacing: 1px; }
.partner-band p { color: #c9d9ec; font-size: 15px; }

.ticker {
  display: inline-flex; align-items: center; gap: 10px;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 14px;
  padding: 16px 20px;
  margin-top: 20px;
  font-size: 14px;
  color: #d7ecff;
}
.ticker b { color: #6fd7ff; font-size: 20px; letter-spacing: 1px; }

.partner-facts { display: grid; gap: 14px; }
.pfact {
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 14px;
  padding: 18px 22px;
}
.pfact b { display: block; color: #fff; font-size: 15px; margin-bottom: 4px; }
.pfact span { font-size: 13.5px; color: #b7cde3; }

/* ---------- 产品 ---------- */
.prod {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 900px) { .prod { grid-template-columns: 1fr; } }

.prod-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  transition: transform .25s;
}
.prod-card:hover { transform: translateY(-5px); }
.prod-visual {
  height: 150px;
  display: flex; align-items: center; justify-content: center;
  font-size: 46px;
  color: #fff;
}
.pv-1 { background: linear-gradient(135deg, #1f6feb, #6ea8ff); }
.pv-2 { background: linear-gradient(135deg, #0a2540, #2c5c9e); }
.pv-3 { background: linear-gradient(135deg, #17c3b2, #4be0d0); }
.pv-4 { background: linear-gradient(135deg, #7b5cff, #b49bff); }
.pv-5 { background: linear-gradient(135deg, #f59e0b, #ffd166); }
.pv-6 { background: linear-gradient(135deg, #e0566b, #ff97a8); }
.prod-body { padding: 24px 26px 28px; flex: 1; }
.prod-body h3 { font-size: 18px; color: var(--navy); margin-bottom: 8px; }
.prod-body p { font-size: 14px; color: var(--text-soft); margin-bottom: 12px; }
.specs { display: flex; flex-wrap: wrap; gap: 8px; }
.specs span {
  font-size: 12px;
  background: #eef4ff;
  color: var(--primary-dark);
  border-radius: 6px;
  padding: 3px 10px;
}

/* ---------- 新闻 ---------- */
.news-list { display: grid; gap: 18px; }
.news-item {
  display: flex; gap: 22px; align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 28px;
  box-shadow: var(--shadow);
  transition: transform .2s;
}
.news-item:hover { transform: translateX(4px); }
.news-date {
  flex: 0 0 auto;
  text-align: center;
  background: #eef4ff;
  border-radius: 10px;
  padding: 10px 16px;
  color: var(--primary-dark);
}
.news-date b { display: block; font-size: 22px; line-height: 1.1; }
.news-date span { font-size: 12px; }
.news-item h3 { font-size: 17px; color: var(--navy); margin-bottom: 6px; }
.news-item p { font-size: 14px; color: var(--text-soft); }
.news-item .tag { font-size: 12px; color: var(--accent); font-weight: 700; letter-spacing: 1px; }

/* ---------- CTA ---------- */
.cta-band {
  background: linear-gradient(120deg, #175bc7, #17c3b2);
  border-radius: 22px;
  padding: 52px;
  text-align: center;
  color: #fff;
}
.cta-band h2 { font-size: 30px; margin-bottom: 12px; letter-spacing: 1px; }
.cta-band p { color: #eaf6ff; margin-bottom: 26px; }
.cta-band .btn { background: #fff; color: var(--primary-dark); }
.cta-band .btn:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(0,0,0,.18); }

/* ---------- 时间线 ---------- */
.timeline { position: relative; padding-left: 30px; }
.timeline::before {
  content: ""; position: absolute; left: 8px; top: 6px; bottom: 6px;
  width: 2px; background: linear-gradient(var(--primary), var(--accent));
}
.tl-item { position: relative; padding-bottom: 34px; }
.tl-item::before {
  content: ""; position: absolute; left: -28px; top: 7px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 0 4px #eaf2ff;
}
.tl-item .year { font-size: 14px; font-weight: 800; color: var(--primary); letter-spacing: 1px; }
.tl-item h3 { font-size: 18px; color: var(--navy); margin: 4px 0 6px; }
.tl-item p { font-size: 14.5px; color: var(--text-soft); }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 30px; }
@media (max-width: 900px) { .contact-grid { grid-template-columns: 1fr; } }

.contact-info { display: grid; gap: 18px; align-content: start; }
.info-item {
  display: flex; gap: 16px; align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 26px;
  box-shadow: var(--shadow);
}
.info-item .icon {
  flex: 0 0 auto;
  width: 46px; height: 46px; border-radius: 12px;
  background: #eaf2ff; display: flex; align-items: center; justify-content: center;
  font-size: 20px;
}
.info-item b { display: block; color: var(--navy); font-size: 15px; margin-bottom: 2px; }
.info-item span { font-size: 14px; color: var(--text-soft); }

.form-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px;
  box-shadow: var(--shadow);
}
.form-card h3 { color: var(--navy); margin-bottom: 22px; font-size: 20px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 640px) { .form-grid { grid-template-columns: 1fr; } }
.form-grid .full { grid-column: 1 / -1; }
.field label { display: block; font-size: 13px; font-weight: 600; color: var(--navy); margin-bottom: 6px; }
.field input, .field select, .field textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 11px 14px;
  font-size: 14px;
  font-family: inherit;
  background: #fbfcfe;
  color: var(--text);
  transition: border .2s, box-shadow .2s;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(31, 111, 235, .12);
}
.field textarea { resize: vertical; min-height: 110px; }
.form-note { font-size: 12px; color: var(--text-soft); margin-top: 12px; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--navy); color: #9db4cc; padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 36px; padding-bottom: 44px; }
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .footer-grid { grid-template-columns: 1fr; } }

.site-footer .brand-name { color: #fff; }
.site-footer .brand-name small { color: #9db4cc; }
.footer-about p { font-size: 13.5px; margin-top: 16px; }
.footer-col h4 { color: #fff; font-size: 15px; margin-bottom: 14px; }
.footer-col ul { display: grid; gap: 8px; }
.footer-col a { font-size: 13.5px; transition: color .2s; }
.footer-col a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .1);
  padding: 20px 0;
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  font-size: 13px;
}

/* ---------- 页面小标题区 ---------- */
.page-hero {
  background: linear-gradient(150deg, #0a2540, #123a63 70%, #175bc7);
  color: #fff;
  text-align: center;
  padding: 72px 0 64px;
}
.page-hero h1 { font-size: 36px; letter-spacing: 2px; margin-bottom: 10px; }
.page-hero p { color: #c9d9ec; font-size: 15px; }
.breadcrumb { font-size: 13px; color: #8fa9c4; margin-top: 14px; }
.breadcrumb a:hover { color: #fff; }

/* ---------- 徽章墙 ---------- */
.logo-wall { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }
.logo-pill {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 999px;
  padding: 12px 26px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-soft);
  box-shadow: var(--shadow);
}
.logo-pill.hl { border-color: var(--primary); color: var(--primary); background: #eef4ff; }