/* ============================================================
   北斗区块链 官方网站  ·  深蓝科技主题
   配色：深蓝底 + 青色科技光 + 少量金色（资质/荣誉）
   原则：整洁、克制、突出规范与高科技、政府接轨
   ============================================================ */

:root {
  --bg-0:#060f1d;
  --bg-1:#0a1a30;
  --bg-2:#0e2440;
  --panel:rgba(255,255,255,.04);
  --panel-2:rgba(255,255,255,.06);
  --border:rgba(120,180,255,.16);
  --border-strong:rgba(120,180,255,.32);
  --text:#e8f1fb;
  --muted:#93a8c4;
  --muted-2:#6f87a6;
  --accent:#2dd4ff;
  --accent-2:#5b8cff;
  --gold:#e7b95a;
  --glow:rgba(45,212,255,.28);
  --radius:16px;
  --maxw:1200px;
  --nav-h:68px;
}

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

html { scroll-behavior:smooth; }

body {
  font-family:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  color:var(--text);
  background:var(--bg-0);
  line-height:1.7;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

/* 全局背景：深蓝渐变 + 网格 + 光晕 */
.bg-deco {
  position:fixed; inset:0; z-index:-2;
  background:
    radial-gradient(1100px 700px at 78% -8%, rgba(45,212,255,.14), transparent 60%),
    radial-gradient(900px 600px at 8% 12%, rgba(91,140,255,.12), transparent 55%),
    linear-gradient(180deg, var(--bg-1) 0%, var(--bg-0) 60%, #050b16 100%);
}
.bg-grid {
  position:fixed; inset:0; z-index:-1;
  background-image:
    linear-gradient(rgba(120,180,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120,180,255,.05) 1px, transparent 1px);
  background-size:46px 46px;
  mask-image:radial-gradient(circle at 50% 0%, #000 0%, transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 50% 0%, #000 0%, transparent 78%);
  opacity:.6;
}

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

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

/* ---------------- 顶部导航 ---------------- */
.nav {
  position:sticky; top:0; z-index:100;
  height:var(--nav-h);
  display:flex; align-items:center;
  backdrop-filter:blur(12px);
  background:rgba(6,15,29,.72);
  border-bottom:1px solid var(--border);
}
.nav .wrap { display:flex; align-items:center; justify-content:space-between; width:100%; }
.brand { display:flex; align-items:center; gap:12px; font-weight:700; letter-spacing:.5px; }
.brand .logo {
  width:36px; height:36px; border-radius:9px;
  background:linear-gradient(135deg, var(--accent), var(--accent-2));
  display:grid; place-items:center; color:#04121f; font-weight:800; font-size:18px;
  box-shadow:0 0 18px var(--glow);
}
.brand .name { font-size:17px; }
.brand .name small { display:block; font-size:11px; color:var(--muted); font-weight:400; letter-spacing:2px; }

.nav-links { display:flex; align-items:center; gap:30px; }
.nav-links a { color:var(--muted); font-size:15px; transition:color .2s; position:relative; }
.nav-links a:hover { color:var(--text); }
.nav-links a::after {
  content:""; position:absolute; left:0; bottom:-6px; height:2px; width:0;
  background:var(--accent); transition:width .25s; box-shadow:0 0 8px var(--glow);
}
.nav-links a:hover::after { width:100%; }
.nav-cta {
  padding:9px 18px; border:1px solid var(--border-strong); border-radius:999px;
  color:var(--text); font-size:14px; transition:.2s;
}
.nav-cta:hover { background:rgba(45,212,255,.12); border-color:var(--accent); }
.nav-admin { border-color:var(--accent); color:var(--accent); }
.nav-admin:hover { background:var(--accent); color:#04101f; }
.nav-toggle { display:none; background:none; border:0; color:var(--text); font-size:24px; cursor:pointer; }
/* 桌面隐藏、移动端折叠菜单内显示（补全手机端缺失的入口） */
.nav-links .mobile-only { display:none; }

/* ---------------- 通用区块 ---------------- */
section { padding:96px 0; position:relative; }
.section-head { text-align:center; max-width:760px; margin:0 auto 54px; }
.eyebrow {
  display:inline-block; font-size:13px; letter-spacing:3px; color:var(--accent);
  text-transform:uppercase; margin-bottom:14px;
  padding:5px 14px; border:1px solid var(--border); border-radius:999px;
  background:rgba(45,212,255,.06);
}
.section-head h2 { font-size:34px; line-height:1.25; margin-bottom:14px; letter-spacing:1px; }
.section-head p { color:var(--muted); font-size:16px; }

/* ---------------- Hero ---------------- */
.hero { padding:120px 0 100px; text-align:center; position:relative; overflow:hidden; }
#particles { position:absolute; inset:0; z-index:-1; }
.hero .badge {
  display:inline-flex; align-items:center; gap:8px; margin-bottom:26px;
  padding:8px 18px; border:1px solid var(--border-strong); border-radius:999px;
  background:rgba(231,185,90,.08); color:var(--gold); font-size:13px; letter-spacing:1px;
}
.hero .badge .dot { width:7px; height:7px; border-radius:50%; background:var(--gold); box-shadow:0 0 10px var(--gold); }
.hero h1 {
  font-size:clamp(34px,5.4vw,62px); line-height:1.15; letter-spacing:1px;
  margin-bottom:22px; font-weight:800;
}
.hero h1 .hl {
  background:linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.hero p.lead { font-size:18px; color:var(--muted); max-width:720px; margin:0 auto 36px; }
.hero-cta { display:flex; gap:16px; justify-content:center; flex-wrap:wrap; }
.btn {
  display:inline-flex; align-items:center; gap:8px; padding:13px 26px; border-radius:999px;
  font-size:15px; font-weight:600; transition:.22s; cursor:pointer; border:1px solid transparent;
}
.btn-primary {
  background:linear-gradient(120deg, var(--accent), var(--accent-2)); color:#04121f;
  box-shadow:0 8px 28px rgba(45,212,255,.28);
}
.btn-primary:hover { transform:translateY(-2px); box-shadow:0 12px 34px rgba(45,212,255,.4); }
.btn-ghost { border-color:var(--border-strong); color:var(--text); }
.btn-ghost:hover { background:rgba(255,255,255,.05); border-color:var(--accent); }

/* 数据条 */
.stats { display:grid; grid-template-columns:repeat(4,1fr); gap:20px; margin-top:70px; }
.stat {
  border:1px solid var(--border); border-radius:var(--radius); padding:26px 18px;
  background:var(--panel); text-align:center;
}
.stat .num { font-size:34px; font-weight:800; color:var(--accent); letter-spacing:1px; }
.stat .num.gold { color:var(--gold); }
.stat .label { color:var(--muted); font-size:14px; margin-top:6px; }

/* ---------------- 卡片网格 ---------------- */
.grid { display:grid; gap:22px; }
.grid-3 { grid-template-columns:repeat(3,1fr); }
.grid-2 { grid-template-columns:repeat(2,1fr); }

.card {
  border:1px solid var(--border); border-radius:var(--radius);
  background:linear-gradient(180deg, var(--panel-2), var(--panel));
  padding:28px 24px; transition:.25s; position:relative; overflow:hidden;
}
.card::before {
  content:""; position:absolute; left:0; top:0; height:3px; width:0;
  background:linear-gradient(90deg, var(--accent), var(--accent-2)); transition:width .3s;
}
.card:hover { transform:translateY(-4px); border-color:var(--border-strong); box-shadow:0 16px 40px rgba(0,0,0,.35); }
.card:hover::before { width:100%; }
.card .ic {
  width:46px; height:46px; border-radius:12px; display:grid; place-items:center;
  background:rgba(45,212,255,.12); border:1px solid var(--border); margin-bottom:16px;
  font-size:22px;
}
.card h3 { font-size:19px; margin-bottom:10px; letter-spacing:.5px; }
.card p { color:var(--muted); font-size:14.5px; }
.card .tag {
  display:inline-block; margin-top:14px; font-size:12px; color:var(--accent);
  border:1px solid var(--border); padding:3px 10px; border-radius:999px;
}

/* ---------------- 关于 / 双栏 ---------------- */
.split { display:grid; grid-template-columns:1.05fr .95fr; gap:48px; align-items:center; }
.split h2 { font-size:30px; margin-bottom:18px; letter-spacing:1px; }
.split p { color:var(--muted); margin-bottom:16px; font-size:15.5px; }
.feature-list { list-style:none; margin-top:10px; }
.feature-list li { display:flex; gap:12px; padding:10px 0; border-bottom:1px dashed var(--border); color:var(--text); font-size:15px; }
.feature-list li .ck { color:var(--accent); font-weight:700; }
.panel-box {
  border:1px solid var(--border); border-radius:var(--radius); padding:30px;
  background:linear-gradient(160deg, rgba(91,140,255,.10), rgba(45,212,255,.04));
}
.panel-box h4 { color:var(--gold); font-size:14px; letter-spacing:2px; margin-bottom:16px; }
.team-row { display:flex; gap:16px; align-items:center; margin:14px 0; }
.team-row .ava {
  width:48px; height:48px; border-radius:50%; flex:0 0 48px; display:grid; place-items:center;
  background:linear-gradient(135deg, var(--accent-2), var(--accent)); color:#04121f; font-weight:800;
}
.team-row .t-name { font-weight:700; }
.team-row .t-role { color:var(--muted); font-size:13px; }

/* ---------------- 资质/荣誉 ---------------- */
.creds { display:grid; grid-template-columns:repeat(2,1fr); gap:16px; }
.cred {
  display:flex; gap:14px; align-items:flex-start; padding:18px 20px;
  border:1px solid var(--border); border-radius:14px; background:var(--panel);
}
.cred .seal { font-size:24px; }
.cred .ct { font-weight:600; font-size:15px; }
.cred .cd { color:var(--muted); font-size:13px; margin-top:3px; }
.cred.gov { border-color:rgba(231,185,90,.35); background:rgba(231,185,90,.05); }

/* ---------------- 合作伙伴 ---------------- */
.partners { display:flex; flex-wrap:wrap; gap:12px; justify-content:center; }
.partner {
  padding:10px 18px; border:1px solid var(--border); border-radius:999px;
  background:var(--panel); color:var(--muted); font-size:14px; transition:.2s;
}
.partner:hover { color:var(--text); border-color:var(--border-strong); }

/* ---------------- 时间线 ---------------- */
.timeline { max-width:820px; margin:0 auto; position:relative; }
.timeline::before {
  content:""; position:absolute; left:18px; top:6px; bottom:6px; width:2px;
  background:linear-gradient(180deg, var(--accent), transparent);
}
.tl-item { position:relative; padding:0 0 34px 56px; }
.tl-item .yr {
  position:absolute; left:0; top:0; width:38px; height:38px; border-radius:50%;
  background:var(--bg-2); border:2px solid var(--accent); display:grid; place-items:center;
  color:var(--accent); font-weight:700; font-size:13px; box-shadow:0 0 14px var(--glow);
}
.tl-item h4 { font-size:17px; margin-bottom:4px; }
.tl-item p { color:var(--muted); font-size:14.5px; }

/* ---------------- 联系 ---------------- */
.contact-grid { display:grid; grid-template-columns:1fr 1fr; gap:22px; }
.contact-card {
  border:1px solid var(--border); border-radius:var(--radius); padding:28px;
  background:var(--panel);
}
.contact-card h3 { font-size:18px; margin-bottom:14px; }
.contact-card .row { display:flex; gap:12px; padding:8px 0; color:var(--muted); font-size:15px; }
.contact-card .row b { color:var(--text); font-weight:600; min-width:72px; }

/* ---------------- 页脚 ---------------- */
.footer { border-top:1px solid var(--border); padding:46px 0 30px; background:rgba(5,11,22,.6); }
.footer .wrap { display:flex; justify-content:space-between; flex-wrap:wrap; gap:24px; }
.footer .f-brand { max-width:320px; }
.footer .f-brand p { color:var(--muted); font-size:13.5px; margin-top:12px; }
.footer .f-links { display:flex; gap:46px; flex-wrap:wrap; }
.footer .f-col h5 { font-size:14px; margin-bottom:12px; color:var(--text); }
.footer .f-col a { display:block; color:var(--muted); font-size:13.5px; padding:5px 0; transition:.2s; }
.footer .f-col a:hover { color:var(--accent); }
.footer .copy { width:100%; text-align:center; color:var(--muted-2); font-size:13px; margin-top:30px; border-top:1px solid var(--border); padding-top:20px; }
.footer .copy .beian { color:var(--gold); text-decoration:none; }
.footer .copy .beian:hover { text-decoration:underline; }
.footer .copy .beian-gov { color:var(--muted); font-size:12px; margin-left:6px; }
.footer .copy .beian-gov a { color:var(--muted-2); text-decoration:none; }
.footer .copy .beian-gov a:hover { color:var(--accent); text-decoration:underline; }

/* ---------------- 子页面 Hero ---------------- */
.subhero { padding:130px 0 60px; text-align:center; }
.subhero .badge { display:inline-block; padding:6px 16px; border:1px solid var(--border-strong); border-radius:999px; color:var(--accent); font-size:13px; letter-spacing:1px; margin-bottom:18px; background:rgba(45,212,255,.06); }
.subhero h1 { font-size:clamp(30px,4.5vw,48px); margin-bottom:14px; letter-spacing:1px; }
.subhero p { color:var(--muted); max-width:680px; margin:0 auto; font-size:16.5px; }
.status-pill {
  display:inline-flex; align-items:center; gap:8px; margin-top:22px;
  padding:8px 18px; border-radius:999px; font-size:14px; letter-spacing:1px;
  border:1px solid rgba(231,185,90,.4); background:rgba(231,185,90,.08); color:var(--gold);
}
.status-pill .dot { width:8px; height:8px; border-radius:50%; background:var(--gold); box-shadow:0 0 10px var(--gold); animation:pulse 1.6s infinite; }
@keyframes pulse { 0%,100%{opacity:1;} 50%{opacity:.35;} }

.breadcrumb { padding:24px 0 0; color:var(--muted); font-size:14px; }
.breadcrumb a:hover { color:var(--accent); }

/* 产品中心列表 */
.prod-list { display:grid; grid-template-columns:repeat(3,1fr); gap:22px; }
.prod-item {
  border:1px solid var(--border); border-radius:var(--radius); padding:26px 22px;
  background:linear-gradient(180deg, var(--panel-2), var(--panel)); transition:.25s; position:relative;
}
.prod-item:hover { transform:translateY(-4px); border-color:var(--border-strong); }
.prod-item .ic { font-size:28px; margin-bottom:12px; }
.prod-item h3 { font-size:19px; margin-bottom:8px; }
.prod-item p { color:var(--muted); font-size:14px; }
.prod-item .soon {
  position:absolute; top:16px; right:16px; font-size:11px; padding:3px 9px; border-radius:999px;
  background:rgba(231,185,90,.12); color:var(--gold); border:1px solid rgba(231,185,90,.35);
}
.prod-item .live {
  position:absolute; top:16px; right:16px; font-size:11px; padding:3px 9px; border-radius:999px;
  background:rgba(45,212,255,.12); color:var(--accent); border:1px solid var(--border);
}
.prod-item a.more { display:inline-block; margin-top:14px; color:var(--accent); font-size:14px; }

/* 模块占位 */
.modules { display:grid; grid-template-columns:repeat(2,1fr); gap:18px; margin-top:40px; }
.module {
  border:1px dashed var(--border-strong); border-radius:14px; padding:24px;
  background:var(--panel); text-align:center;
}
.module .mic { font-size:30px; margin-bottom:10px; opacity:.8; }
.module h4 { font-size:16px; margin-bottom:6px; }
.module p { color:var(--muted); font-size:13.5px; }

/* ---------------- 后台（预留） ---------------- */
.admin-body { min-height:100vh; display:grid; place-items:center; padding:40px 20px; }
.admin-card {
  width:min(420px,100%); border:1px solid var(--border-strong); border-radius:20px;
  background:linear-gradient(180deg, rgba(14,36,64,.9), rgba(10,26,48,.9));
  padding:40px 34px; box-shadow:0 30px 80px rgba(0,0,0,.5);
}
.admin-card .logo { display:flex; align-items:center; gap:12px; margin-bottom:6px; }
.admin-card h2 { font-size:23px; margin-bottom:4px; }
.admin-card .sub { color:var(--muted); font-size:13.5px; margin-bottom:26px; }
.field { margin-bottom:16px; }
.field label { display:block; font-size:13px; color:var(--muted); margin-bottom:7px; }
.field input {
  width:100%; padding:12px 14px; border-radius:10px; border:1px solid var(--border);
  background:rgba(255,255,255,.04); color:var(--text); font-size:15px; outline:none; transition:.2s;
}
.field input:focus { border-color:var(--accent); box-shadow:0 0 0 3px rgba(45,212,255,.12); }
.admin-card .btn-primary { width:100%; justify-content:center; margin-top:6px; }
.admin-note {
  margin-top:22px; font-size:12.5px; color:var(--muted-2); line-height:1.6;
  border-top:1px dashed var(--border); padding-top:16px;
}
.admin-note b { color:var(--gold); }
.admin-modules { display:grid; grid-template-columns:1fr 1fr; gap:10px; margin-top:18px; }
.admin-modules .am { font-size:12.5px; color:var(--muted); border:1px solid var(--border); border-radius:10px; padding:10px; text-align:center; }
.admin-modules .am b { color:var(--text); display:block; font-size:13px; }

/* ---------------- 响应式 · PC 与移动端统一适配 ---------------- */
@media (max-width:1024px){
  :root{ --maxw:100%; }
  .wrap{ padding:0 20px; }
}
@media (max-width:980px){
  .grid-3, .prod-list { grid-template-columns:repeat(2,1fr); }
  .split { grid-template-columns:1fr; gap:30px; }
  .contact-grid { grid-template-columns:1fr; }
  .stats { grid-template-columns:repeat(2,1fr); }
}
@media (max-width:680px){
  .nav-links { display:none; position:absolute; top:var(--nav-h); left:0; right:0;
    flex-direction:column; gap:0; background:rgba(6,15,29,.97); border-bottom:1px solid var(--border); padding:8px 0; }
  .nav-links.open { display:flex; }
  .nav-links a { padding:15px 24px; width:100%; }
  .nav-links a::after { display:none; }
  .nav-cta { display:none; }                 /* 桌面 CTA 在手机隐藏 */
  .nav-links .mobile-only { display:block; } /* 改用折叠菜单内的入口 */
  .nav-toggle { display:block; }
  .grid-3, .prod-list, .grid-2, .creds, .modules, .admin-modules { grid-template-columns:1fr; }
  section { padding:62px 0; }
  .section-head { margin-bottom:36px; }
  .section-head h2 { font-size:25px; }
  .hero { padding:92px 0 66px; }
  .hero h1 { font-size:clamp(27px,8vw,40px); }
  .hero p.lead { font-size:16px; }
  .stats { margin-top:46px; gap:14px; }
  .stat { padding:22px 12px; }
  .stat .num { font-size:27px; }
  .split h2 { font-size:24px; }
  .subhero { padding:104px 0 46px; }
  .subhero h1 { font-size:clamp(25px,7vw,38px); }
  .footer .wrap { gap:26px; }
  .footer .f-links { gap:26px; }
  .footer .f-brand { max-width:100%; }
  .cred .ct { font-size:14px; }
  .contact-card .row { font-size:14px; }
  .admin-card { padding:34px 24px; }
}
@media (max-width:380px){
  .hero-cta { flex-direction:column; }
  .hero-cta .btn { width:100%; justify-content:center; }
  .btn { width:100%; justify-content:center; }
}

/* ---------------- 管理员入口 · 仅页面角落低调保留 ---------------- */
/* 这是官网，99% 内容对所有人开放浏览；此入口只是给管理员用的小接口 */
.admin-corner {
  position:fixed; right:16px; bottom:calc(16px + env(safe-area-inset-bottom)); z-index:200;
  display:inline-flex; align-items:center; gap:6px;
  padding:7px 12px; border-radius:999px; font-size:12px; letter-spacing:.5px;
  color:var(--muted-2); background:rgba(6,15,29,.55);
  border:1px solid var(--border); backdrop-filter:blur(8px);
  opacity:.42; transition:.25s;
}
.admin-corner:hover { opacity:1; color:var(--accent); border-color:var(--border-strong); }
.admin-corner .dot { width:6px; height:6px; border-radius:50%; background:var(--muted-2); transition:.25s; }
.admin-corner:hover .dot { background:var(--accent); box-shadow:0 0 8px var(--glow); }
@media (max-width:680px){
  .admin-corner { right:10px; bottom:calc(10px + env(safe-area-inset-bottom)); padding:5px 10px; font-size:11px; }
}

/* 滚动浮现 */
.reveal { opacity:0; transform:translateY(24px); transition:.7s cubic-bezier(.2,.7,.3,1); }
.reveal.in { opacity:1; transform:none; }