:root {
  --bg: #ffffff;
  --bg-alt: #f4f6f9;
  --ink: #0d1726;
  --ink-soft: #4b5869;
  --line: #e2e7ee;
  --dark: #070d18;
  --dark-2: #0d1626;
  --dark-line: rgba(148, 178, 222, 0.14);
  --dark-ink: #e6edf7;
  --dark-soft: #8f9db2;
  --brand: #1f6feb;
  --brand-dark: #1758c4;
  --cyan: #3fd5e8;
  --ok: #2ecc8f;
  --warn: #f5b341;
  --radius: 10px;
  --wrap: 1180px;
  --mono: "SF Mono", "JetBrains Mono", "Cascadia Code", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
}

a { color: var(--brand); text-decoration: none; }
a:hover { color: var(--brand-dark); }
h1, h2, h3 { line-height: 1.3; margin: 0; font-weight: 700; }
h1 { font-size: clamp(32px, 5vw, 54px); letter-spacing: -0.02em; }
h2 { font-size: clamp(24px, 3.2vw, 34px); letter-spacing: -0.01em; margin-bottom: 36px; }
h3 { font-size: 18px; }
p { margin: 0; }
.mono { font-family: var(--mono); }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }

/* 页头 */
.header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(7, 13, 24, 0.86);
  border-bottom: 1px solid var(--dark-line);
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
}
.header .wrap { display: flex; align-items: center; height: 64px; gap: 28px; }
.logo { display: inline-flex; align-items: baseline; color: #fff; white-space: nowrap; line-height: 1; }
.logo:hover { color: #fff; }
.logo-cn { font-size: 21px; font-weight: 800; letter-spacing: 0.06em; }
.logo-sub { font-size: 21px; font-weight: 300; letter-spacing: 0.06em; color: var(--dark-soft); margin-left: 2px; }
.logo-dot { font-size: 26px; font-weight: 800; color: var(--cyan); margin-left: 1px; }
.nav { display: flex; gap: 24px; margin-left: auto; }
.nav a { color: var(--dark-soft); font-size: 15px; white-space: nowrap; transition: color 0.15s; }
.nav a:hover, .nav a[aria-current="page"] { color: #fff; }
.header-tel {
  font-family: var(--mono); font-size: 15px; color: var(--cyan); white-space: nowrap;
  padding: 6px 12px; border: 1px solid rgba(63, 213, 232, 0.35); border-radius: 6px;
}
.header-tel:hover { color: #fff; border-color: var(--cyan); }

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px; border-radius: 8px; font-weight: 600; font-size: 16px;
  background: var(--brand); color: #fff; border: 1px solid var(--brand);
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.btn:hover { background: var(--brand-dark); border-color: var(--brand-dark); color: #fff; }
.btn-ghost { background: transparent; color: var(--dark-ink); border-color: rgba(230, 237, 247, 0.28); }
.btn-ghost:hover { background: rgba(230, 237, 247, 0.08); border-color: var(--dark-ink); color: #fff; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }

/* 深色区块与网格背景 */
.dark { background: var(--dark); color: var(--dark-ink); position: relative; overflow: hidden; }
.dark::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(var(--dark-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--dark-line) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 70% 30%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 70% 30%, #000 20%, transparent 75%);
}
.dark::after {
  content: ""; position: absolute; pointer-events: none;
  width: 720px; height: 720px; right: -220px; top: -320px;
  background: radial-gradient(circle, rgba(31, 111, 235, 0.28), transparent 65%);
}
.dark > .wrap { position: relative; z-index: 1; }
.dark p { color: var(--dark-soft); }

/* 首屏 */
.hero { padding: 96px 0 104px; }
.hero-grid { display: grid; grid-template-columns: 1fr 1.08fr; gap: 56px; align-items: center; }
.hero h1 { color: #fff; }
.hero h1 em { font-style: normal; color: var(--cyan); }
.hero-lead { margin-top: 22px; font-size: 18px; max-width: 520px; }
.promises { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 40px; padding: 0; list-style: none; }
.promises li { display: flex; align-items: center; gap: 8px; font-size: 15px; color: var(--dark-ink); }
.promises li::before {
  content: ""; width: 14px; height: 14px; flex: none; border-radius: 3px;
  background: var(--cyan) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 14 14'%3E%3Cpath d='M3 7.2l2.6 2.6L11 4.4' fill='none' stroke='%23070d18' stroke-width='2'/%3E%3C/svg%3E") center/contain no-repeat;
}

/* 控制台 */
.console {
  background: rgba(13, 22, 38, 0.92);
  border: 1px solid rgba(148, 178, 222, 0.22);
  border-radius: 12px;
  box-shadow: 0 30px 80px -20px rgba(0, 0, 0, 0.7), 0 0 0 1px rgba(63, 213, 232, 0.05) inset;
  font-family: var(--mono);
  font-size: 13px;
  overflow: hidden;
}
.console-bar {
  display: flex; align-items: center; gap: 7px; padding: 12px 16px;
  border-bottom: 1px solid var(--dark-line); color: var(--dark-soft); font-size: 12px;
}
.console-bar i { width: 10px; height: 10px; border-radius: 50%; background: #2a3548; }
.console-bar span { margin-left: 10px; }
.console-bar .live { margin-left: auto; display: flex; align-items: center; gap: 6px; color: var(--ok); }
.console-bar .live::before {
  content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--ok);
  box-shadow: 0 0 0 0 rgba(46, 204, 143, 0.6); animation: pulse 1.8s infinite;
}
@keyframes pulse { 70% { box-shadow: 0 0 0 7px rgba(46, 204, 143, 0); } 100% { box-shadow: 0 0 0 0 rgba(46, 204, 143, 0); } }

.console-body { padding: 18px; display: grid; gap: 14px; }
.kpis { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.kpi { padding: 12px 14px; border: 1px solid var(--dark-line); border-radius: 8px; background: rgba(7, 13, 24, 0.5); }
.kpi span { display: block; color: var(--dark-soft); font-size: 11px; font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif; }
.kpi strong { display: block; margin-top: 4px; font-size: 20px; color: #fff; font-weight: 600; font-variant-numeric: tabular-nums; }
.kpi strong.warn { color: var(--warn); }
.kpi small { color: var(--dark-soft); font-size: 13px; font-weight: 400; }

.chart { border: 1px solid var(--dark-line); border-radius: 8px; background: rgba(7, 13, 24, 0.5); padding: 10px 12px 6px; }
.chart-head { display: flex; justify-content: space-between; color: var(--dark-soft); font-size: 11px; }
.chart-head b { color: var(--cyan); font-weight: 500; }
.chart svg { display: block; width: 100%; height: 92px; margin-top: 6px; }

.devices { display: grid; gap: 6px; }
.device {
  display: grid; grid-template-columns: 14px 1fr auto auto; align-items: center; gap: 10px;
  padding: 8px 12px; border-radius: 6px; background: rgba(7, 13, 24, 0.5); color: var(--dark-ink);
}
.device .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); }
.device .dot.warn { background: var(--warn); }
.device .dot.off { background: #4a5568; }
.device em { font-style: normal; color: var(--dark-soft); font-variant-numeric: tabular-nums; min-width: 66px; text-align: right; }
.device b { font-weight: 500; font-size: 12px; color: var(--ok); min-width: 30px; text-align: right; }
.device b.warn { color: var(--warn); }
.device b.off { color: var(--dark-soft); }

.log {
  margin: 0; height: 86px; overflow: hidden; padding: 10px 12px; border-radius: 8px;
  background: #050a13; color: #7f8ea6; font-size: 11.5px; line-height: 1.6; white-space: pre;
}
.log .t { color: #56637a; }
.log .k { color: var(--cyan); }
.log .w { color: var(--warn); }

/* 浅色区块 */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }

/* 服务 */
.services { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.service {
  display: flex; flex-direction: column; gap: 10px;
  padding: 30px 28px 28px; background: #fff; color: var(--ink); position: relative;
  transition: background 0.2s;
}
.service:hover { background: #f8fbff; color: var(--ink); }
.service .idx { font-family: var(--mono); font-size: 13px; color: var(--brand); }
.service p { color: var(--ink-soft); font-size: 15px; }
.service .arrow {
  position: absolute; top: 28px; right: 26px; color: var(--line); transition: color 0.2s, transform 0.2s;
}
.service:hover .arrow { color: var(--brand); transform: translateX(3px); }
.services-4 { grid-template-columns: repeat(4, 1fr); }
.services-3 { grid-template-columns: repeat(3, 1fr); }
.service-cta { background: var(--dark); color: var(--dark-ink); }
.service-cta:hover { background: var(--dark-2); color: #fff; }
.service-cta .idx { color: var(--cyan); }
.service-cta h3 { color: #fff; }
.service-cta p { color: var(--dark-soft); }
.service-cta .cta-tel { margin-top: auto; padding-top: 8px; color: var(--cyan); font-size: 18px; }
.service-cta:hover .arrow { color: var(--cyan); }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; padding-top: 8px; }
.tag {
  font-family: var(--mono); font-size: 12px; color: var(--ink-soft);
  padding: 3px 8px; border: 1px solid var(--line); border-radius: 4px; background: var(--bg-alt);
}

/* 架构 */
.arch { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; position: relative; }
.layer {
  position: relative; padding: 24px 22px; border: 1px solid rgba(148, 178, 222, 0.22); border-radius: 10px;
  background: rgba(13, 22, 38, 0.85);
}
.layer:not(:last-child)::after {
  content: ""; position: absolute; top: 50%; right: -29px; width: 30px; height: 1px;
  background: linear-gradient(90deg, rgba(63, 213, 232, 0.2), var(--cyan));
}
.layer:not(:last-child)::before {
  content: ""; position: absolute; top: calc(50% - 4px); right: -30px;
  border-left: 7px solid var(--cyan); border-top: 4px solid transparent; border-bottom: 4px solid transparent;
}
.layer .lv { font-family: var(--mono); font-size: 12px; color: var(--cyan); }
.layer h3 { color: #fff; margin: 6px 0 16px; }
.layer ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.layer li {
  font-size: 14px; color: var(--dark-ink); padding: 7px 10px; border-radius: 6px;
  background: rgba(7, 13, 24, 0.6); border: 1px solid var(--dark-line);
}
.arch-note { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 10px 28px; font-family: var(--mono); font-size: 13px; color: var(--dark-soft); }
.arch-note span::before { content: "› "; color: var(--cyan); }

/* 技术栈 */
.stack { display: grid; gap: 0; border-top: 1px solid var(--line); }
.stack-row { display: grid; grid-template-columns: 160px 1fr; gap: 24px; padding: 22px 0; border-bottom: 1px solid var(--line); align-items: baseline; }
.stack-row h3 { font-size: 16px; color: var(--ink-soft); font-weight: 600; }
.stack-row .tags { padding: 0; margin: 0; gap: 8px; }
.stack-row .tag { font-size: 13px; color: var(--ink); background: #fff; padding: 5px 10px; }

/* 流程 */
.steps { display: grid; grid-template-columns: repeat(6, 1fr); gap: 0; counter-reset: step; }
.step { counter-increment: step; padding: 0 20px 0 0; position: relative; }
.step::before {
  content: counter(step, decimal-leading-zero);
  display: block; font-family: var(--mono); font-size: 13px; color: var(--brand);
  padding-bottom: 14px; margin-bottom: 18px; border-bottom: 2px solid var(--line);
}
.step:first-child::before { border-bottom-color: var(--brand); }
.step h3 { font-size: 17px; margin-bottom: 6px; }
.step p { font-size: 14px; color: var(--ink-soft); }

/* 二级页 */
.page-hero { padding: 80px 0 84px; }
.crumb { font-family: var(--mono); font-size: 13px; color: var(--dark-soft); margin-bottom: 22px; }
.crumb a { color: var(--dark-soft); }
.crumb a:hover { color: #fff; }
.page-hero h1 { color: #fff; font-size: clamp(30px, 4.4vw, 46px); }
.page-hero .hero-lead { max-width: 640px; }
.page-hero .tags { margin-top: 26px; padding: 0; }
.page-hero .tag { color: var(--cyan); background: rgba(63, 213, 232, 0.06); border-color: rgba(63, 213, 232, 0.3); }

.split { display: grid; grid-template-columns: 360px 1fr; gap: 48px; align-items: start; }
.split h2 { margin-bottom: 0; position: sticky; top: 100px; }

.issues { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.issues li { display: grid; grid-template-columns: 52px 1fr; padding: 20px 0; border-bottom: 1px solid var(--line); font-size: 17px; }
.issues li span { font-family: var(--mono); font-size: 13px; color: var(--brand); padding-top: 3px; }

.features { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.feature { padding: 26px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.feature h3 { margin-bottom: 8px; display: flex; align-items: center; gap: 10px; }
.feature h3::before { content: ""; width: 6px; height: 18px; border-radius: 2px; background: var(--brand); }
.feature p { color: var(--ink-soft); font-size: 15px; }

.faq details { border-bottom: 1px solid var(--line); }
.faq details:first-of-type { border-top: 1px solid var(--line); }
.faq summary { cursor: pointer; font-weight: 600; font-size: 17px; list-style: none; padding: 22px 40px 22px 0; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: 4px; top: 18px; font-family: var(--mono); font-size: 22px; font-weight: 400; color: var(--brand);
}
.faq details[open] summary::after { content: "−"; }
.faq details p { padding: 0 40px 22px 0; color: var(--ink-soft); }

/* 项目类型 */
.types { display: flex; flex-wrap: wrap; gap: 10px; }
.types span { padding: 9px 16px; border: 1px solid var(--line); border-radius: 6px; background: #fff; font-size: 15px; }
.area-note { margin-top: 22px; color: var(--ink-soft); font-size: 15px; }

/* 资讯 */
.section-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 36px; }
.section-head h2 { margin-bottom: 0; }
.section-head a { font-size: 15px; }
.posts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.post {
  display: flex; flex-direction: column; gap: 10px; padding: 26px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius); color: var(--ink);
  transition: border-color 0.15s, transform 0.15s;
}
.post:hover { border-color: var(--brand); transform: translateY(-2px); color: var(--ink); }
.post time { font-family: var(--mono); font-size: 13px; color: var(--brand); }
.post h3 { font-size: 17px; line-height: 1.5; }
.post p { font-size: 14px; color: var(--ink-soft); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }

.post-title { max-width: 820px; }
.post-meta { margin-top: 18px; font-family: var(--mono); font-size: 13px; }
.post-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 56px; align-items: start; }
.prose { max-width: 760px; font-size: 17px; line-height: 1.9; }
.prose p { margin: 0 0 20px; }
.prose h2 { font-size: 23px; margin: 40px 0 16px; padding-left: 14px; border-left: 4px solid var(--brand); }
.prose ul { margin: 0 0 22px; padding: 0; list-style: none; display: grid; gap: 10px; }
.prose li { position: relative; padding-left: 22px; }
.prose li::before { content: ""; position: absolute; left: 4px; top: 0.78em; width: 7px; height: 7px; border-radius: 2px; background: var(--brand); }
.post-side { position: sticky; top: 96px; display: grid; gap: 16px; }
.side-box { padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); }
.side-box h3 { font-size: 16px; margin-bottom: 12px; }
.side-box a:not(.btn) { display: block; padding: 8px 0; border-top: 1px solid var(--line); font-size: 15px; }
.side-contact { background: var(--dark); border-color: var(--dark); color: var(--dark-ink); }
.side-contact h3 { color: #fff; margin-bottom: 4px; }
.side-contact p { color: var(--dark-soft); font-size: 14px; margin-bottom: 16px; }
.side-contact .btn { width: 100%; justify-content: center; }

.footer-area { margin-top: 10px; font-size: 13px; line-height: 1.8; max-width: 340px; }

/* 联系 */
.cta { padding: 88px 0; }
.cta-grid { display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: center; }
.cta h2 { color: #fff; margin-bottom: 12px; }
.cta .actions { margin-top: 0; }

.contact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }
.contact-card {
  display: block; padding: 30px; border: 1px solid var(--line); border-radius: 12px; background: #fff; color: var(--ink);
}
a.contact-card:hover { border-color: var(--brand); color: var(--ink); }
.contact-card span { display: block; font-size: 14px; color: var(--ink-soft); }
.contact-card strong { display: block; margin-top: 8px; font-family: var(--mono); font-size: 24px; font-weight: 600; word-break: break-all; }
.qr { width: 180px; border-radius: 8px; margin-top: 16px; }

/* 页脚 */
.footer { background: var(--dark); color: var(--dark-soft); font-size: 14px; padding: 56px 0 36px; border-top: 1px solid var(--dark-line); }
.footer-top { display: grid; grid-template-columns: 1.2fr 2fr; gap: 40px; padding-bottom: 36px; border-bottom: 1px solid var(--dark-line); }
.footer .logo { margin-bottom: 14px; }
.footer-links { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 10px 24px; }
.footer a { color: var(--dark-soft); }
.footer a:hover { color: #fff; }
.footer-meta { display: flex; flex-wrap: wrap; gap: 6px 24px; padding-top: 24px; font-size: 13px; }

.callbar { display: none; }

/* 入场动画 */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .console-bar .live::before { animation: none; }
}

@media (max-width: 1080px) {
  .nav { display: none; }
  .services-4, .services-3 { grid-template-columns: repeat(2, 1fr); }
  .posts { grid-template-columns: repeat(2, 1fr); }
  .post-layout { grid-template-columns: 1fr; gap: 36px; }
  .post-side { position: static; }
  .header-tel { margin-left: auto; }
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .arch { grid-template-columns: repeat(2, 1fr); }
  .layer:nth-child(2)::after, .layer:nth-child(2)::before { display: none; }
  .steps { grid-template-columns: repeat(3, 1fr); row-gap: 36px; }
  .split { grid-template-columns: 1fr; gap: 28px; }
  .split h2 { position: static; }
}

@media (max-width: 680px) {
  body { padding-bottom: 60px; }
  .header .wrap { height: 56px; }
  .header-tel { font-size: 14px; padding: 5px 10px; }
  .hero { padding: 56px 0 64px; }
  .page-hero { padding: 52px 0 56px; }
  .section { padding: 64px 0; }
  .hero-lead { font-size: 16px; }
  .kpi { padding: 10px; }
  .kpi span { font-size: 10.5px; white-space: nowrap; }
  .kpi strong { font-size: 15px; }
  .kpi small { display: none; }
  .actions { display: grid; grid-template-columns: 1fr; }
  .actions .btn { justify-content: center; }
  .promises { gap: 10px 16px; }
  .device em:nth-of-type(1) { display: none; }
  .log { display: none; }
  .arch { grid-template-columns: 1fr; gap: 26px; }
  .layer::after, .layer::before { display: none; }
  .layer:not(:last-child)::after {
    display: block; top: auto; bottom: -27px; right: auto; left: 50%; width: 1px; height: 26px;
    background: linear-gradient(180deg, rgba(63, 213, 232, 0.2), var(--cyan));
  }
  .stack-row { grid-template-columns: 1fr; gap: 12px; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .features { grid-template-columns: 1fr; }
  .services-4, .services-3 { grid-template-columns: 1fr; }
  .posts { grid-template-columns: 1fr; }
  .prose { font-size: 16px; }
  .logo-cn, .logo-sub { font-size: 19px; }
  .cta-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .callbar {
    display: grid; grid-template-columns: 1fr 1fr; position: fixed; left: 0; right: 0; bottom: 0; z-index: 60;
    background: var(--dark); border-top: 1px solid var(--dark-line);
  }
  .callbar a { text-align: center; padding: 16px 0; font-weight: 600; color: var(--dark-ink); }
  .callbar a + a { background: var(--brand); color: #fff; }
}