/* ============================================================
   广州市飞绰网络科技有限公司 — 统一设计系统
   品牌色：青色 #02b2b5
   ============================================================ */

:root {
  --teal: #02b2b5;
  --teal-600: #029a9d;
  --teal-700: #017a7d;
  --teal-50: #e6f7f7;
  --ink: #16242f;
  --slate: #33485a;
  --muted: #6b7c8a;
  --bg: #f5f8fa;
  --bg-soft: #eef4f6;
  --card: #ffffff;
  --border: #e4ecf0;
  --shadow-sm: 0 4px 14px rgba(2, 40, 50, .06);
  --shadow: 0 14px 38px rgba(2, 40, 50, .10);
  --radius: 16px;
  --radius-sm: 10px;
  --maxw: 1180px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
    "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

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

/* ---------------- Header / Nav ---------------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .9);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 700; }
.brand-mark {
  width: 40px; height: 40px; border-radius: 11px;
  background: linear-gradient(135deg, var(--teal), var(--teal-700));
  color: #fff; display: grid; place-items: center; font-size: 20px; font-weight: 800;
  box-shadow: 0 6px 16px rgba(2, 178, 181, .35);
}
.brand-text { font-size: 17px; letter-spacing: .5px; }
.nav { display: flex; gap: 6px; align-items: center; }
.nav a {
  padding: 9px 16px; border-radius: 999px; color: var(--slate);
  font-size: 15px; font-weight: 500; transition: .2s;
}
.nav a:hover { color: var(--teal-700); background: var(--teal-50); }
.nav a.active { color: #fff; background: var(--teal); box-shadow: 0 6px 16px rgba(2, 178, 181, .3); }

/* ---------------- Buttons ---------------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 26px; border-radius: 999px; font-weight: 600; font-size: 15px;
  transition: .2s; cursor: pointer; border: 1px solid transparent;
}
.btn-primary { background: var(--teal); color: #fff; box-shadow: 0 10px 24px rgba(2, 178, 181, .35); }
.btn-primary:hover { background: var(--teal-700); transform: translateY(-2px); }
.btn-ghost { background: #fff; color: var(--teal-700); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--teal); background: var(--teal-50); }

/* ---------------- Hero ---------------- */
.hero {
  position: relative; overflow: hidden;
  background: radial-gradient(1200px 500px at 80% -10%, rgba(2, 178, 181, .18), transparent 60%),
    linear-gradient(180deg, #ffffff, var(--bg));
  padding: 84px 0 72px;
}
.hero::after {
  content: ""; position: absolute; right: -120px; top: -80px; width: 420px; height: 420px;
  background: radial-gradient(circle, rgba(2, 178, 181, .12), transparent 70%);
  border-radius: 50%;
}
.hero-inner { position: relative; z-index: 1; max-width: 760px; }
.eyebrow {
  display: inline-block; padding: 6px 14px; border-radius: 999px;
  background: var(--teal-50); color: var(--teal-700); font-size: 13px; font-weight: 600;
  letter-spacing: .5px; margin-bottom: 20px;
}
.hero h1 { font-size: clamp(30px, 5vw, 46px); line-height: 1.25; letter-spacing: -.5px; }
.hero h1 .accent { color: var(--teal); }
.hero p.lead { margin-top: 20px; font-size: 18px; color: var(--slate); max-width: 640px; }
.hero-actions { margin-top: 32px; display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { margin-top: 48px; display: flex; gap: 40px; flex-wrap: wrap; }
.hero-stats .stat strong { display: block; font-size: 30px; color: var(--teal-700); }
.hero-stats .stat span { color: var(--muted); font-size: 14px; }

/* ---------------- Sections ---------------- */
.section { padding: 76px 0; }
.section.alt { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 48px; }
.section-head .eyebrow { margin-bottom: 14px; }
.section-head h2 { font-size: clamp(26px, 3.5vw, 34px); letter-spacing: -.5px; }
.section-head p { margin-top: 14px; color: var(--muted); font-size: 16px; }

/* ---------------- Cards / Grid ---------------- */
.grid { display: grid; gap: 22px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }

.card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow-sm); transition: .22s;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.card .ico {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center;
  background: var(--teal-50); color: var(--teal-700); font-size: 24px; margin-bottom: 16px;
}
.card h3 { font-size: 19px; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 15px; }

/* icon tile using emoji-free glyph badges */
.badge-list { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.badge {
  padding: 7px 14px; border-radius: 999px; background: #fff; border: 1px solid var(--border);
  font-size: 13.5px; color: var(--slate); font-weight: 500;
}
.badge.teal { background: var(--teal-50); border-color: transparent; color: var(--teal-700); }

/* ---------------- Tech specs ---------------- */
.spec-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.spec {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 20px 22px;
}
.spec h4 { color: var(--teal-700); font-size: 15px; margin-bottom: 6px; letter-spacing: .3px; }
.spec p { color: var(--slate); font-size: 14.5px; }

/* ---------------- Timeline ---------------- */
.timeline { position: relative; max-width: 820px; margin: 0 auto; padding-left: 28px; }
.timeline::before {
  content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px;
  background: linear-gradient(var(--teal), var(--teal-50));
}
.tl-item { position: relative; padding: 0 0 30px 26px; }
.tl-item::before {
  content: ""; position: absolute; left: -28px; top: 4px; width: 16px; height: 16px;
  border-radius: 50%; background: #fff; border: 3px solid var(--teal);
}
.tl-item .year { font-weight: 700; color: var(--teal-700); }
.tl-item h4 { margin: 4px 0 6px; font-size: 17px; }
.tl-item p { color: var(--muted); font-size: 15px; }

/* ---------------- CTA banner ---------------- */
.cta {
  background: linear-gradient(135deg, var(--teal), var(--teal-700));
  border-radius: 24px; padding: 52px 40px; text-align: center; color: #fff;
  box-shadow: 0 20px 50px rgba(2, 120, 123, .35);
}
.cta h2 { font-size: clamp(24px, 3vw, 32px); }
.cta p { margin: 12px auto 26px; max-width: 560px; opacity: .92; }
.cta .btn-ghost { background: #fff; color: var(--teal-700); }

/* ---------------- Page hero (sub pages) ---------------- */
.page-hero { background: linear-gradient(180deg, var(--teal-50), var(--bg)); padding: 64px 0 52px; }
.page-hero h1 { font-size: clamp(28px, 4vw, 40px); }
.page-hero p { margin-top: 14px; color: var(--slate); font-size: 17px; max-width: 680px; }

/* ---------------- Case cards ---------------- */
.case {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow-sm); transition: .22s; display: flex; flex-direction: column;
}
.case:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.case .case-top {
  padding: 22px 24px; background: linear-gradient(135deg, var(--teal-50), #fff);
  border-bottom: 1px solid var(--border);
}
.case .tag { font-size: 12.5px; color: var(--teal-700); font-weight: 600; letter-spacing: .4px; }
.case h3 { font-size: 19px; margin-top: 6px; }
.case .case-body { padding: 22px 24px; flex: 1; }
.case .case-body p { color: var(--muted); font-size: 14.5px; }
.case .case-foot { padding: 0 24px 22px; }
.case .metric { display: flex; gap: 18px; margin-top: 10px; }
.case .metric div strong { display: block; color: var(--teal-700); font-size: 22px; }
.case .metric div span { font-size: 12.5px; color: var(--muted); }

/* ---------------- News ---------------- */
.news-item {
  display: grid; grid-template-columns: 130px 1fr; gap: 24px; align-items: start;
  padding: 26px 0; border-bottom: 1px solid var(--border);
}
.news-item .date { color: var(--teal-700); font-weight: 700; font-size: 15px; }
.news-item .date span { display: block; font-size: 13px; color: var(--muted); font-weight: 500; }
.news-item h3 { font-size: 19px; margin-bottom: 8px; }
.news-item p { color: var(--muted); font-size: 15px; }

/* ---------------- Contact block ---------------- */
.contact-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 28px; }
.contact-info li { list-style: none; padding: 14px 0; border-bottom: 1px dashed var(--border); display: flex; gap: 12px; }
.contact-info .k { color: var(--teal-700); font-weight: 600; min-width: 64px; }
.contact-info .v { color: var(--slate); }
.info-card { background: linear-gradient(135deg, var(--teal), var(--teal-700)); color: #fff; border-radius: var(--radius); padding: 34px; }
.info-card h3 { font-size: 22px; margin-bottom: 12px; }
.info-card p { opacity: .92; }

/* ---------------- Footer ---------------- */
.site-footer { background: #0e2230; color: #c7d6df; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1.2fr; gap: 36px; padding: 54px 0 36px; }
.site-footer .brand-text { color: #fff; }
.site-footer h4 { color: #fff; font-size: 15px; margin-bottom: 16px; letter-spacing: .4px; }
.site-footer a { color: #c7d6df; display: block; padding: 5px 0; font-size: 14.5px; transition: .2s; }
.site-footer a:hover { color: var(--teal); }
.site-footer p { font-size: 14.5px; line-height: 1.9; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .08); padding: 18px 0; text-align: center; font-size: 13px; color: #8aa0ad; }
.footer-bottom .beian { margin-top: 6px; font-size: 13px; }
.footer-bottom .beian a { color: #aebfc9; text-decoration: none; transition: .2s; }
.footer-bottom .beian a:hover { color: var(--teal); text-decoration: underline; }

/* ---------------- Responsive ---------------- */
@media (max-width: 980px) {
  .grid-3, .grid-4, .grid-5 { grid-template-columns: repeat(2, 1fr); }
  .contact-grid, .spec-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .nav { gap: 0; flex-wrap: wrap; justify-content: flex-end; }
  .nav a { padding: 7px 11px; font-size: 14px; }
  .brand-text { font-size: 15px; }
  .grid-2, .grid-3, .grid-4, .grid-5 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .news-item { grid-template-columns: 1fr; gap: 8px; }
  .hero-stats { gap: 26px; }
}