:root {
  --bg: #05070d;
  --bg-2: #080d18;
  --bg-3: #0c1424;
  --card: rgba(10, 18, 34, 0.78);
  --line: rgba(62, 168, 255, 0.16);
  --line-strong: rgba(80, 190, 255, 0.42);
  --blue: #1aa3ff;
  --blue-2: #4ec8ff;
  --cyan: #6ae0ff;
  --text: #eef5ff;
  --muted: #8b9cb8;
  --dim: #5d6f8a;
  --danger: #ff5d7a;
  --ok: #3ee0a7;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  --radius: 18px;
  --header-h: 76px;
  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --display: "DIN Alternate", "Bahnschrift", "PingFang SC", "Microsoft YaHei", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  min-height: 100%;
}

body {
  overflow-x: hidden;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

::selection {
  background: rgba(26, 163, 255, 0.35);
  color: #fff;
}

.skip {
  position: absolute;
  left: -999px;
  top: 8px;
}

.skip:focus {
  left: 8px;
  z-index: 80;
  background: #fff;
  color: #000;
  padding: 8px 12px;
}

.container {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(1200px 600px at 12% -10%, rgba(20, 110, 220, 0.22), transparent 55%),
    radial-gradient(900px 500px at 92% 8%, rgba(0, 180, 255, 0.1), transparent 50%),
    radial-gradient(800px 500px at 70% 110%, rgba(30, 80, 180, 0.16), transparent 55%),
    linear-gradient(180deg, #070b14 0%, #05070d 40%, #070b16 100%);
}

.bg-grid::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(80, 160, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(80, 160, 255, 0.045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at 50% 20%, #000 20%, transparent 75%);
  pointer-events: none;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  backdrop-filter: blur(18px);
  background: rgba(5, 8, 16, 0.72);
  border-bottom: 1px solid rgba(90, 170, 255, 0.1);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand img {
  width: 42px;
  height: 42px;
  object-fit: contain;
}

.brand b {
  display: block;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.1;
}

.brand em {
  display: block;
  font-style: normal;
  font-family: var(--display);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--blue-2);
  text-transform: none;
}

.nav {
  display: flex;
  align-items: stretch;
  align-self: stretch;
  gap: 4px;
  margin-left: 12px;
}

.nav > a,
.nav-drop > .nav-link {
  display: flex;
  align-items: center;
  padding: 8px 14px;
  color: var(--muted);
  font-size: 14px;
  border-radius: 999px;
  transition: 0.2s ease;
}

.nav > a:hover,
.nav > a.active,
.nav-drop:hover > .nav-link,
.nav-drop > .nav-link.active {
  color: #fff;
  background: rgba(26, 163, 255, 0.1);
}

.nav-drop {
  position: relative;
  display: flex;
  align-items: center;
}

.drop {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 188px;
  padding: 14px 8px 8px;
  background: transparent;
  border: 0;
  box-shadow: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition: opacity 0.16s ease 0.18s, transform 0.16s ease 0.18s, visibility 0s linear 0.34s;
  z-index: 60;
}

.drop::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(8, 14, 26, 0.98);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
  z-index: -1;
}

.nav-drop:hover .drop,
.nav-drop:focus-within .drop {
  opacity: 1;
  visibility: visible;
  transform: none;
  transition-delay: 0s;
}

.drop a {
  display: block;
  padding: 10px 12px;
  border-radius: 10px;
  color: var(--muted);
  font-size: 13px;
}

.drop a:hover {
  background: rgba(26, 163, 255, 0.12);
  color: #fff;
}

.header-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-phone {
  font-family: var(--display);
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--cyan);
  font-size: 15px;
}

.menu-btn {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  background: transparent;
  border-radius: 10px;
  cursor: pointer;
  position: relative;
}

.menu-btn span,
.menu-btn::before,
.menu-btn::after {
  content: "";
  position: absolute;
  left: 11px;
  right: 11px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
}

.menu-btn::before { top: 13px; }
.menu-btn span { top: 20px; display: block; }
.menu-btn::after { bottom: 13px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 20px;
  border-radius: 999px;
  border: 0;
  cursor: pointer;
  background: linear-gradient(135deg, #1aa3ff, #0a6ad6);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 8px 28px rgba(20, 120, 255, 0.28);
  transition: 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
  filter: brightness(1.08);
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--line-strong);
  box-shadow: none;
  color: var(--text);
}

.btn-ghost:hover {
  background: rgba(26, 163, 255, 0.1);
}

.btn-sm {
  height: 38px;
  padding: 0 16px;
  font-size: 13px;
}

/* Hero */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  display: flex;
  align-items: center;
  padding: 48px 0 80px;
  overflow: hidden;
}

.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.55;
  pointer-events: none;
}

.hero-orb {
  position: absolute;
  width: 520px;
  height: 520px;
  right: -80px;
  top: 10%;
  background: radial-gradient(circle, rgba(30, 150, 255, 0.22), transparent 62%);
  filter: blur(8px);
  pointer-events: none;
}

.hero-copy {
  position: relative;
  z-index: 2;
  max-width: 760px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 12px 6px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--blue-2);
  font-size: 12px;
  letter-spacing: 0.12em;
  background: rgba(10, 24, 46, 0.6);
}

.eyebrow i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan);
  display: block;
}

.hero h1 {
  margin: 22px 0 12px;
  font-size: clamp(2.2rem, 5.2vw, 4.35rem);
  line-height: 1.18;
  font-weight: 900;
  letter-spacing: 0.04em;
}

.hero h1 span {
  display: block;
  background: linear-gradient(180deg, #ffffff 20%, #8fd0ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.slogan-sub {
  margin: 0 0 18px;
  font-size: clamp(1.05rem, 2vw, 1.45rem);
  color: var(--blue-2);
  letter-spacing: 0.18em;
  font-weight: 500;
}

.lead {
  margin: 0 0 28px;
  max-width: 560px;
  color: var(--muted);
  font-size: 16px;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 36px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  color: var(--dim);
  font-size: 13px;
}

.hero-meta strong {
  display: block;
  color: #fff;
  font-size: 18px;
  font-family: var(--display);
  font-weight: 700;
}

.section {
  padding: 84px 0;
  position: relative;
}

.section-head {
  margin-bottom: 36px;
}

.kicker {
  color: var(--blue-2);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-family: var(--display);
}

.section-head h2 {
  margin: 8px 0 10px;
  font-size: clamp(1.7rem, 3vw, 2.35rem);
  letter-spacing: 0.04em;
}

.section-head p {
  margin: 0;
  color: var(--muted);
  max-width: 640px;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  overflow: hidden;
  transition: 0.25s ease;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.02) inset;
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  box-shadow: 0 16px 40px rgba(10, 80, 180, 0.18);
}

.card.featured {
  background:
    linear-gradient(180deg, rgba(20, 80, 160, 0.18), rgba(10, 18, 34, 0.85));
}

.card-tag {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  border: 1px solid rgba(106, 224, 255, 0.3);
  padding: 3px 8px;
  border-radius: 999px;
  margin-bottom: 14px;
}

.icon-box {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  margin-bottom: 16px;
  background: linear-gradient(135deg, rgba(26, 163, 255, 0.2), rgba(26, 163, 255, 0.04));
  border: 1px solid var(--line);
  color: var(--blue-2);
  font-family: var(--display);
  font-size: 13px;
  letter-spacing: 0.06em;
  flex-shrink: 0;
}

.card h3 {
  margin: 0 0 10px;
  font-size: 22px;
}

.card p {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 14px;
}

.card ul {
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  color: #c5d4ea;
  font-size: 14px;
}

.card ul li {
  padding: 6px 0 6px 18px;
  position: relative;
}

.card ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--blue);
}

.link-more {
  color: var(--blue-2);
  font-size: 14px;
  font-weight: 600;
}

.feature-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 20px;
}

.feature-list {
  display: grid;
  gap: 14px;
}

.feature-item {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(8, 14, 26, 0.55);
}

.feature-item .icon-box {
  margin-bottom: 0;
  width: 44px;
  height: 44px;
}

.feature-item h3 {
  margin: 0 0 4px;
  font-size: 16px;
}

.feature-item p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.panel {
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(18, 50, 96, 0.28), rgba(8, 14, 26, 0.8));
  padding: 28px;
  min-height: 100%;
}

.panel h3 {
  margin: 0 0 8px;
}

.panel p {
  color: var(--muted);
  font-size: 14px;
}

.spec {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 18px;
}

.spec div {
  padding: 12px;
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.22);
  border: 1px solid rgba(90, 170, 255, 0.1);
}

.spec b {
  display: block;
  font-family: var(--display);
  color: var(--cyan);
  font-size: 18px;
}

.spec span {
  color: var(--dim);
  font-size: 12px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.step {
  padding: 22px 18px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(8, 14, 26, 0.5);
}

.step em {
  font-family: var(--display);
  font-style: normal;
  color: var(--blue);
  font-size: 13px;
  letter-spacing: 0.14em;
}

.step h3 {
  margin: 10px 0 8px;
  font-size: 17px;
}

.step p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.cta-band {
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 42px;
  background:
    linear-gradient(120deg, rgba(18, 90, 180, 0.28), rgba(8, 16, 30, 0.7) 45%, rgba(0, 160, 220, 0.12));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.cta-band h2 {
  margin: 0 0 8px;
  font-size: 28px;
}

.cta-band p {
  margin: 0;
  color: var(--muted);
}

.page-hero {
  padding: 56px 0 24px;
}

.page-hero h1 {
  margin: 10px 0 12px;
  font-size: clamp(2rem, 4vw, 3rem);
}

.crumbs {
  color: var(--dim);
  font-size: 13px;
}

.crumbs a:hover {
  color: var(--blue-2);
}

.content-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr;
  gap: 24px;
  padding-bottom: 80px;
}

.prose h2 {
  margin: 28px 0 10px;
  font-size: 22px;
}

.prose p,
.prose li {
  color: var(--muted);
}

.prose ul {
  padding-left: 18px;
}

.side-card .btn,
.side-card .btn-ghost {
  width: 100%;
  margin-top: 10px;
}

.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 24px;
  padding-bottom: 80px;
}

.contact-item {
  display: flex;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.contact-item:last-child {
  border-bottom: 0;
}

.contact-item small {
  display: block;
  color: var(--dim);
  font-size: 12px;
}

.contact-item b {
  font-size: 16px;
}

form.lead-form {
  display: grid;
  gap: 14px;
}

.field label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  background: rgba(4, 8, 16, 0.7);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 14px;
  outline: none;
  transition: 0.2s ease;
}

.field textarea {
  min-height: 120px;
  resize: vertical;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(26, 163, 255, 0.15);
}

.hp {
  position: absolute;
  left: -9999px;
  opacity: 0;
}

.form-msg {
  min-height: 22px;
  font-size: 13px;
}

.form-msg.ok { color: var(--ok); }
.form-msg.err { color: var(--danger); }

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 28px 0;
}

.about-stats div {
  padding: 20px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(8, 14, 26, 0.5);
}

.about-stats b {
  display: block;
  font-family: var(--display);
  font-size: 28px;
  color: var(--cyan);
}

.logo-well {
  margin-top: 24px;
  background: #fff;
  border-radius: 16px;
  padding: 22px;
  display: inline-block;
}

.logo-well img {
  height: 72px;
  width: auto;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 42px 0 24px;
  background: rgba(0, 0, 0, 0.25);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 24px;
}

.footer-brand {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 12px;
}

.footer-brand img {
  width: 40px;
  height: 40px;
}

.site-footer p,
.site-footer a {
  color: var(--muted);
  font-size: 13px;
}

.site-footer h4 {
  margin: 0 0 12px;
  font-size: 14px;
}

.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer li {
  margin: 0 0 8px;
}

.site-footer a:hover {
  color: #fff;
}

.copyright {
  margin-top: 28px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--dim);
  font-size: 12px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.float-bar {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 40;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.float-bar a {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: rgba(8, 16, 30, 0.92);
  border: 1px solid var(--line-strong);
  color: var(--cyan);
  font-size: 11px;
  letter-spacing: 0.04em;
}

.float-bar a:hover {
  background: #1278d8;
  color: #fff;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin: 12px 0 24px;
}

.table th,
.table td {
  border: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
}

.table th {
  background: rgba(20, 60, 120, 0.25);
  color: #fff;
}

.table td {
  color: var(--muted);
}

@media (max-width: 960px) {
  .product-grid,
  .steps,
  .feature-grid,
  .content-grid,
  .contact-grid,
  .footer-grid,
  .about-stats {
    grid-template-columns: 1fr;
  }

  .cta-band {
    flex-direction: column;
    align-items: flex-start;
    padding: 28px;
  }

  .header-phone {
    display: none;
  }

  .menu-btn {
    display: block;
  }

  .nav {
    position: fixed;
    inset: var(--header-h) 0 0 0;
    background: rgba(4, 8, 16, 0.97);
    flex-direction: column;
    align-items: stretch;
    padding: 20px;
    gap: 8px;
    display: none;
  }

  body.nav-open .nav {
    display: flex;
  }

  .nav-drop {
    flex-direction: column;
    align-items: stretch;
  }

  .drop {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    background: transparent;
    border: 0;
    padding: 0 0 0 12px;
    transition: none;
  }

  .drop::before {
    display: none;
  }
}

@media (max-width: 640px) {
  .container {
    width: calc(100% - 28px);
  }

  .hero {
    padding-top: 28px;
  }

  .spec {
    grid-template-columns: 1fr;
  }
}