:root {
  --ink: #071a22;
  --ink-soft: #173640;
  --muted: #61747a;
  --line: #dce8e8;
  --surface: #f4f9f8;
  --white: #ffffff;
  --mint: #74f3c5;
  --mint-strong: #25d79b;
  --blue: #67a8ff;
  --shadow: 0 20px 60px rgba(7, 26, 34, 0.1);
  --radius-lg: 32px;
  --radius-md: 22px;
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 110px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 12px;
  left: 12px;
  padding: 10px 16px;
  color: var(--ink);
  background: var(--mint);
  border-radius: 10px;
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.container {
  width: min(calc(100% - 48px), var(--container));
  margin-inline: auto;
}

.site-header {
  position: fixed;
  z-index: 100;
  top: 0;
  left: 0;
  width: 100%;
  padding: 20px 24px;
  transition: padding 180ms ease, background 180ms ease;
}

.site-header.is-scrolled {
  padding-top: 10px;
  padding-bottom: 10px;
  background: rgba(244, 249, 248, 0.8);
  backdrop-filter: blur(14px);
}

.nav-shell {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  width: min(100%, 1240px);
  min-height: 68px;
  margin: 0 auto;
  padding: 0 18px 0 24px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: 20px;
  box-shadow: 0 10px 35px rgba(7, 26, 34, 0.09);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-size: 22px;
  font-weight: 780;
  letter-spacing: -0.03em;
}

.brand-mark {
  position: relative;
  display: inline-grid;
  width: 34px;
  height: 38px;
  place-items: center;
  background: var(--ink);
  border-radius: 17px 17px 14px 14px;
  clip-path: polygon(50% 0, 94% 17%, 86% 73%, 50% 100%, 14% 73%, 6% 17%);
}

.brand-mark span {
  width: 11px;
  height: 15px;
  border-right: 3px solid var(--mint);
  border-bottom: 3px solid var(--mint);
  transform: rotate(45deg) translate(-1px, -2px);
}

.primary-nav {
  display: flex;
  justify-content: center;
  gap: clamp(24px, 3vw, 42px);
}

.primary-nav a {
  position: relative;
  color: var(--ink-soft);
  font-size: 15px;
  font-weight: 600;
}

.mobile-center-link {
  display: none;
}

.primary-nav a::after {
  position: absolute;
  right: 0;
  bottom: -7px;
  left: 0;
  height: 2px;
  content: "";
  background: var(--mint-strong);
  transform: scaleX(0);
  transition: transform 180ms ease;
}

.primary-nav a:hover::after,
.primary-nav a:focus-visible::after {
  transform: scaleX(1);
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: 0;
  border-radius: 12px;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  margin: 5px auto;
  background: var(--ink);
  transition: transform 180ms ease, opacity 180ms ease;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 54px;
  padding: 0 25px;
  font-weight: 750;
  border: 1px solid transparent;
  border-radius: 16px;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button:focus-visible,
.text-link:focus-visible,
.primary-nav a:focus-visible,
.menu-toggle:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(37, 215, 155, 0.4);
  outline-offset: 4px;
}

.button-small {
  min-height: 44px;
  padding: 0 18px;
  color: var(--white);
  background: var(--ink);
  border-radius: 13px;
  font-size: 14px;
}

.button-small:hover {
  background: #12313b;
  box-shadow: 0 12px 24px rgba(7, 26, 34, 0.16);
}

.button-primary {
  color: var(--ink);
  background: var(--mint);
  box-shadow: 0 15px 32px rgba(37, 215, 155, 0.22);
}

.button-primary:hover {
  background: #91f8d3;
  box-shadow: 0 18px 38px rgba(37, 215, 155, 0.3);
}

.button-light {
  color: var(--ink);
  background: var(--white);
  box-shadow: 0 15px 34px rgba(0, 0, 0, 0.16);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
  font-weight: 750;
  border-bottom: 1px solid currentColor;
}

.hero {
  position: relative;
  min-height: 780px;
  padding: 180px 0 110px;
  overflow: hidden;
  background:
    linear-gradient(120deg, rgba(255,255,255,0.92), rgba(244,249,248,0.72)),
    repeating-linear-gradient(90deg, transparent 0, transparent 79px, rgba(7,26,34,0.035) 80px),
    repeating-linear-gradient(0deg, transparent 0, transparent 79px, rgba(7,26,34,0.035) 80px),
    var(--surface);
}

.hero::after {
  position: absolute;
  right: -10%;
  bottom: -220px;
  width: 640px;
  height: 640px;
  content: "";
  border: 1px solid rgba(37, 215, 155, 0.16);
  border-radius: 50%;
  box-shadow: 0 0 0 80px rgba(37, 215, 155, 0.035), 0 0 0 160px rgba(37, 215, 155, 0.025);
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(2px);
  pointer-events: none;
}

.hero-glow-one {
  top: -200px;
  right: 10%;
  width: 520px;
  height: 520px;
  background: rgba(116, 243, 197, 0.22);
  filter: blur(90px);
}

.hero-glow-two {
  bottom: -260px;
  left: -160px;
  width: 520px;
  height: 520px;
  background: rgba(103, 168, 255, 0.13);
  filter: blur(90px);
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(460px, 0.9fr);
  align-items: center;
  gap: 70px;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  color: #168a68;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.eyebrow span {
  width: 30px;
  height: 2px;
  background: currentColor;
}

.hero h1 {
  max-width: 720px;
  margin: 0;
  font-size: clamp(52px, 6.2vw, 84px);
  line-height: 1.08;
  letter-spacing: -0.065em;
}

.hero h1 em {
  color: #168a68;
  font-style: normal;
}

.hero-lead {
  max-width: 620px;
  margin: 28px 0 0;
  color: var(--ink-soft);
  font-size: 18px;
  line-height: 1.9;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-top: 38px;
}

.hero-points {
  display: flex;
  gap: 24px;
  margin: 34px 0 0;
  padding: 0;
  color: var(--muted);
  list-style: none;
  font-size: 14px;
}

.hero-points span {
  display: inline-grid;
  width: 20px;
  height: 20px;
  margin-right: 5px;
  color: var(--ink);
  background: var(--mint);
  border-radius: 50%;
  place-items: center;
  font-size: 12px;
  font-weight: 900;
}

.hero-visual {
  position: relative;
  min-height: 520px;
}

.visual-card {
  position: absolute;
  top: 20px;
  right: 0;
  width: min(100%, 480px);
  min-height: 500px;
  padding: 26px;
  color: var(--white);
  overflow: hidden;
  background: linear-gradient(145deg, #0c2b35, #071a22 65%);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 38px;
  box-shadow: 0 35px 80px rgba(7, 26, 34, 0.26);
}

.visual-card::before {
  position: absolute;
  top: -160px;
  right: -100px;
  width: 340px;
  height: 340px;
  content: "";
  background: rgba(116, 243, 197, 0.16);
  border-radius: 50%;
  filter: blur(45px);
}

.visual-topline,
.connection-row {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.visual-topline > div {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 700;
}

.status-dot {
  width: 9px;
  height: 9px;
  background: var(--mint);
  border-radius: 50%;
  box-shadow: 0 0 0 6px rgba(116, 243, 197, 0.11);
}

.status-pill {
  padding: 6px 11px;
  color: var(--mint);
  background: rgba(116, 243, 197, 0.1);
  border: 1px solid rgba(116, 243, 197, 0.2);
  border-radius: 999px;
  font-size: 12px;
}

.network-orbit {
  position: relative;
  display: grid;
  width: 300px;
  height: 300px;
  margin: 36px auto 26px;
  place-items: center;
}

.orbit {
  position: absolute;
  border: 1px solid rgba(116, 243, 197, 0.26);
  border-radius: 50%;
}

.orbit-one {
  width: 230px;
  height: 230px;
}

.orbit-two {
  width: 300px;
  height: 300px;
  border-color: rgba(255, 255, 255, 0.1);
}

.globe-core {
  position: relative;
  z-index: 2;
  display: grid;
  width: 142px;
  height: 142px;
  background: radial-gradient(circle at 35% 30%, #97ffdb, var(--mint-strong) 55%, #15966f);
  border-radius: 50%;
  box-shadow: 0 0 0 15px rgba(116, 243, 197, 0.07), 0 22px 55px rgba(37, 215, 155, 0.25);
  place-items: center;
}

.globe-core::before,
.globe-core::after {
  position: absolute;
  content: "";
  border: 1px solid rgba(7, 26, 34, 0.3);
  border-radius: 50%;
}

.globe-core::before {
  width: 72px;
  height: 136px;
}

.globe-core::after {
  width: 136px;
  height: 70px;
}

.core-shield {
  position: relative;
  z-index: 2;
  display: grid;
  width: 54px;
  height: 60px;
  color: var(--mint);
  background: var(--ink);
  clip-path: polygon(50% 0, 92% 16%, 84% 73%, 50% 100%, 16% 73%, 8% 16%);
  place-items: center;
  font-size: 24px;
  font-weight: 900;
}

.network-node {
  position: absolute;
  z-index: 3;
  width: 13px;
  height: 13px;
  background: var(--white);
  border: 4px solid rgba(116, 243, 197, 0.35);
  border-radius: 50%;
  box-sizing: content-box;
}

.node-one { top: 33px; left: 76px; }
.node-two { top: 85px; right: 19px; }
.node-three { right: 71px; bottom: 27px; }
.node-four { bottom: 74px; left: 17px; }

.connection-row {
  padding: 20px;
  background: rgba(255, 255, 255, 0.065);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 18px;
}

.connection-row > div:first-child {
  display: flex;
  flex-direction: column;
}

.row-label {
  color: rgba(255, 255, 255, 0.55);
  font-size: 12px;
}

.connection-row strong {
  font-size: 15px;
}

.signal-bars {
  display: flex;
  align-items: end;
  gap: 4px;
  height: 28px;
}

.signal-bars span {
  width: 5px;
  background: var(--mint);
  border-radius: 3px;
}

.signal-bars span:nth-child(1) { height: 9px; }
.signal-bars span:nth-child(2) { height: 14px; }
.signal-bars span:nth-child(3) { height: 20px; }
.signal-bars span:nth-child(4) { height: 27px; }

.floating-card {
  position: absolute;
  z-index: 4;
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 170px;
  padding: 15px 17px;
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: 17px;
  box-shadow: 0 20px 45px rgba(7, 26, 34, 0.15);
}

.floating-card-speed {
  top: 90px;
  left: -48px;
}

.floating-card-device {
  right: -32px;
  bottom: 55px;
}

.floating-icon {
  display: grid;
  width: 38px;
  height: 38px;
  color: var(--ink);
  background: var(--mint);
  border-radius: 12px;
  place-items: center;
  font-size: 16px;
  font-weight: 900;
}

.floating-card div {
  display: flex;
  flex-direction: column;
  line-height: 1.4;
}

.floating-card small {
  color: var(--muted);
  font-size: 11px;
}

.floating-card strong {
  font-size: 14px;
}

.trust-strip {
  color: var(--white);
  background: var(--ink);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding: 30px 0;
}

.trust-grid > div {
  display: flex;
  flex-direction: column;
  padding: 5px 36px;
  border-right: 1px solid rgba(255, 255, 255, 0.12);
}

.trust-grid > div:first-child { padding-left: 0; }
.trust-grid > div:last-child { border-right: 0; }
.trust-grid strong { color: var(--mint); font-size: 20px; }
.trust-grid span { color: rgba(255, 255, 255, 0.63); font-size: 13px; }

.section {
  padding: 120px 0;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 55px;
}

.section-heading-centered {
  margin-right: auto;
  margin-left: auto;
  text-align: center;
}

.section-heading-centered .eyebrow {
  justify-content: center;
}

.section h2,
.final-cta h2 {
  margin: 0;
  font-size: clamp(36px, 4.4vw, 58px);
  line-height: 1.18;
  letter-spacing: -0.045em;
}

.section-heading > p:last-child,
.device-copy > p,
.faq-intro > p {
  max-width: 640px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.advantages {
  background: var(--white);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.feature-card {
  position: relative;
  min-height: 350px;
  padding: 34px;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid #e5eeee;
  border-radius: var(--radius-md);
  transition: transform 200ms ease, box-shadow 200ms ease;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}

.feature-card-highlight {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--white);
}

.feature-number {
  position: absolute;
  top: 26px;
  right: 28px;
  color: rgba(7, 26, 34, 0.18);
  font-size: 44px;
  font-weight: 850;
}

.feature-card-highlight .feature-number {
  color: rgba(255, 255, 255, 0.13);
}

.feature-icon {
  display: grid;
  width: 62px;
  height: 62px;
  margin-bottom: 65px;
  color: var(--ink);
  background: var(--mint);
  border-radius: 18px;
  place-items: center;
}

.icon-route {
  position: relative;
}

.icon-route span {
  position: absolute;
  width: 10px;
  height: 10px;
  background: var(--ink);
  border-radius: 50%;
}

.icon-route span:nth-child(1) { top: 17px; left: 16px; }
.icon-route span:nth-child(2) { top: 27px; right: 14px; }
.icon-route span:nth-child(3) { bottom: 14px; left: 20px; }

.icon-route::before,
.icon-route::after {
  position: absolute;
  width: 25px;
  height: 2px;
  content: "";
  background: var(--ink);
  transform-origin: left center;
}

.icon-route::before { top: 23px; left: 23px; transform: rotate(20deg); }
.icon-route::after { top: 35px; left: 25px; transform: rotate(-26deg); }

.icon-lock span {
  position: relative;
  width: 25px;
  height: 22px;
  margin-top: 9px;
  background: var(--ink);
  border-radius: 5px;
}

.icon-lock span::before {
  position: absolute;
  top: -16px;
  left: 5px;
  width: 15px;
  height: 18px;
  content: "";
  border: 3px solid var(--ink);
  border-bottom: 0;
  border-radius: 12px 12px 0 0;
}

.icon-refresh { font-size: 34px; font-weight: 700; }

.feature-card h3 {
  margin: 0 0 14px;
  font-size: 23px;
  line-height: 1.3;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
}

.feature-card-highlight p {
  color: rgba(255, 255, 255, 0.64);
}

.card-accent {
  position: absolute;
  right: -60px;
  bottom: -60px;
  width: 170px;
  height: 170px;
  border: 1px solid rgba(116, 243, 197, 0.27);
  border-radius: 50%;
  box-shadow: 0 0 0 35px rgba(116, 243, 197, 0.035), 0 0 0 70px rgba(116, 243, 197, 0.025);
}

.devices {
  color: var(--white);
  overflow: hidden;
  background: var(--ink);
}

.devices-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  align-items: center;
  gap: 90px;
}

.eyebrow-light { color: var(--mint); }

.device-copy > p {
  color: rgba(255, 255, 255, 0.64);
}

.platform-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 32px 0 38px;
}

.platform-list span {
  padding: 9px 14px;
  color: rgba(255, 255, 255, 0.78);
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  font-size: 13px;
}

.device-panel {
  position: relative;
  min-height: 480px;
}

.device-panel::before {
  position: absolute;
  top: 0;
  left: 10%;
  width: 400px;
  height: 400px;
  content: "";
  background: rgba(116, 243, 197, 0.15);
  border-radius: 50%;
  filter: blur(90px);
}

.device-window {
  position: absolute;
  top: 44px;
  left: 0;
  width: 82%;
  min-height: 350px;
  overflow: hidden;
  background: #f8fbfb;
  border: 8px solid #193741;
  border-radius: 24px;
  box-shadow: 0 35px 65px rgba(0, 0, 0, 0.28);
}

.window-bar {
  display: flex;
  gap: 6px;
  padding: 14px 18px;
  background: #e7efef;
}

.window-bar i {
  width: 8px;
  height: 8px;
  background: #b7c8c8;
  border-radius: 50%;
}

.window-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 48px 28px;
  color: var(--ink);
}

.window-kicker {
  color: #5e7479;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.window-status {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 20px 0 28px;
  font-size: 22px;
  font-weight: 800;
}

.window-status span {
  width: 12px;
  height: 12px;
  background: var(--mint-strong);
  border-radius: 50%;
  box-shadow: 0 0 0 7px rgba(37, 215, 155, 0.14);
}

.window-line {
  width: 52%;
  height: 8px;
  margin-bottom: 11px;
  background: #dbe7e7;
  border-radius: 10px;
}

.window-line-long { width: 72%; }

.window-button {
  margin-top: 26px;
  padding: 10px 38px;
  background: var(--mint);
  border-radius: 12px;
  font-weight: 800;
}

.device-phone {
  position: absolute;
  z-index: 3;
  right: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 190px;
  height: 375px;
  padding: 64px 22px 25px;
  color: var(--ink);
  background: linear-gradient(160deg, #f9ffff, #e0f6ef);
  border: 8px solid #193741;
  border-radius: 34px;
  box-shadow: 0 32px 65px rgba(0, 0, 0, 0.35);
}

.phone-speaker {
  position: absolute;
  top: 17px;
  width: 46px;
  height: 5px;
  background: #a2b5b7;
  border-radius: 10px;
}

.phone-shield {
  display: grid;
  width: 72px;
  height: 82px;
  margin: 28px 0 20px;
  color: var(--mint);
  background: var(--ink);
  clip-path: polygon(50% 0, 92% 16%, 84% 73%, 50% 100%, 16% 73%, 8% 16%);
  place-items: center;
  font-size: 28px;
  font-weight: 900;
}

.device-phone strong { font-size: 18px; }
.device-phone small { margin-top: 4px; color: var(--muted); }
.phone-home { position: absolute; bottom: 14px; width: 58px; height: 4px; background: #9fb2b4; border-radius: 10px; }

.start {
  background: var(--surface);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin: 0;
  padding: 0;
  counter-reset: steps;
  list-style: none;
}

.steps li {
  position: relative;
  display: flex;
  gap: 20px;
  padding: 32px;
  background: var(--white);
  border: 1px solid var(--line);
}

.steps li:first-child { border-radius: 22px 0 0 22px; }
.steps li:last-child { border-radius: 0 22px 22px 0; }
.steps li + li { border-left: 0; }

.steps li:not(:last-child)::after {
  position: absolute;
  z-index: 2;
  top: 50%;
  right: -14px;
  display: grid;
  width: 28px;
  height: 28px;
  content: "›";
  color: var(--muted);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 50%;
  transform: translateY(-50%);
  place-items: center;
}

.step-index {
  display: grid;
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  color: var(--ink);
  background: var(--mint);
  border-radius: 13px;
  place-items: center;
  font-weight: 900;
}

.steps h3 {
  margin: 3px 0 9px;
  font-size: 19px;
}

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

.start-action {
  margin-top: 40px;
  text-align: center;
}

.faq-grid {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: 90px;
}

.faq-intro .text-link {
  margin-top: 24px;
}

.faq-list details {
  border-bottom: 1px solid var(--line);
}

.faq-list details:first-child {
  border-top: 1px solid var(--line);
}

.faq-list summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 0;
  cursor: pointer;
  list-style: none;
  font-size: 18px;
  font-weight: 750;
}

.faq-list summary::-webkit-details-marker { display: none; }

.faq-list summary span {
  display: grid;
  flex: 0 0 auto;
  width: 30px;
  height: 30px;
  background: var(--surface);
  border-radius: 50%;
  place-items: center;
  transition: transform 180ms ease, background 180ms ease;
}

.faq-list details[open] summary span {
  background: var(--mint);
  transform: rotate(45deg);
}

.faq-list details p {
  max-width: 640px;
  margin: -5px 44px 24px 0;
  color: var(--muted);
}

.final-cta {
  color: var(--white);
  background: var(--ink);
}

.final-cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  min-height: 360px;
  padding-top: 70px;
  padding-bottom: 70px;
}

.final-cta h2 { font-size: clamp(36px, 4vw, 54px); }
.final-cta p:last-child { margin: 18px 0 0; color: rgba(255, 255, 255, 0.64); }

.site-footer {
  padding: 70px 0 24px;
  background: #f2f7f6;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr auto;
  align-items: start;
  gap: 60px;
}

.brand-footer { margin-bottom: 14px; }
.footer-grid > div p { margin: 0; color: var(--muted); font-size: 14px; }

.footer-grid nav {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px 28px;
}

.footer-grid nav a,
.footer-center-link {
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 650;
}

.footer-grid nav a:hover,
.footer-center-link:hover { color: #168a68; }

.footer-center-link {
  padding-bottom: 4px;
  border-bottom: 1px solid currentColor;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  margin-top: 55px;
  padding-top: 22px;
  color: #78898e;
  border-top: 1px solid var(--line);
  font-size: 12px;
}

.footer-bottom p { margin: 0; }

.error-page {
  display: grid;
  min-height: 100vh;
  padding: 28px;
  background:
    radial-gradient(circle at 70% 20%, rgba(116, 243, 197, 0.22), transparent 35%),
    var(--surface);
  place-items: center;
}

.error-page main {
  width: min(100%, 620px);
  padding: clamp(32px, 7vw, 70px);
  text-align: center;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.error-page .brand { justify-content: center; }
.error-code { margin: 40px 0 0; color: #168a68; font-size: 15px; font-weight: 850; letter-spacing: 0.2em; }
.error-page h1 { margin: 8px 0 14px; font-size: clamp(32px, 6vw, 48px); line-height: 1.2; letter-spacing: -0.04em; }
.error-page main > p:not(.error-code) { margin: 0 0 30px; color: var(--muted); }

@media (max-width: 1050px) {
  .hero-grid { grid-template-columns: 1fr 0.86fr; gap: 35px; }
  .hero h1 { font-size: clamp(48px, 6vw, 66px); }
  .floating-card-speed { left: -15px; }
  .floating-card-device { right: -8px; }
  .devices-grid { gap: 45px; }
}

@media (max-width: 900px) {
  .site-header { padding: 12px; }
  .nav-shell { grid-template-columns: 1fr auto; min-height: 62px; padding: 0 10px 0 18px; }
  .menu-toggle { display: block; grid-column: 2; grid-row: 1; }
  .nav-cta { display: none; }
  .primary-nav {
    position: absolute;
    top: calc(100% + 8px);
    right: 12px;
    left: 12px;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px;
    visibility: hidden;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow);
    opacity: 0;
    transform: translateY(-10px);
    transition: opacity 180ms ease, transform 180ms ease, visibility 180ms ease;
  }
  .primary-nav.is-open { visibility: visible; opacity: 1; transform: translateY(0); }
  .primary-nav a { padding: 13px 12px; border-radius: 10px; }
  .primary-nav a:hover { background: var(--surface); }
  .primary-nav a::after { display: none; }
  .primary-nav .mobile-center-link {
    display: block;
    margin-top: 6px;
    color: var(--white);
    text-align: center;
    background: var(--ink);
  }
  .primary-nav .mobile-center-link:hover { color: var(--white); background: #12313b; }
  .menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .hero { padding-top: 145px; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-copy { max-width: 700px; }
  .hero-visual { width: min(100%, 590px); margin: 0 auto; }
  .visual-card { right: 50%; transform: translateX(50%); }
  .trust-grid { grid-template-columns: repeat(2, 1fr); row-gap: 25px; }
  .trust-grid > div:nth-child(2) { border-right: 0; }
  .trust-grid > div:nth-child(3) { padding-left: 0; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card { min-height: 280px; }
  .feature-icon { margin-bottom: 40px; }
  .devices-grid { grid-template-columns: 1fr; }
  .device-copy { max-width: 680px; }
  .device-panel { width: min(100%, 650px); margin: 0 auto; }
  .steps { grid-template-columns: 1fr; gap: 12px; }
  .steps li, .steps li:first-child, .steps li:last-child { border: 1px solid var(--line); border-radius: 18px; }
  .steps li:not(:last-child)::after { display: none; }
  .faq-grid { grid-template-columns: 1fr; gap: 45px; }
}

@media (max-width: 640px) {
  html { scroll-padding-top: 88px; }
  .container { width: min(calc(100% - 32px), var(--container)); }
  .site-header { padding: 8px; }
  .nav-shell { border-radius: 16px; }
  .brand { font-size: 19px; }
  .brand-mark { width: 29px; height: 33px; }

  .hero { min-height: auto; padding: 125px 0 80px; }
  .hero h1 { font-size: clamp(42px, 12vw, 56px); letter-spacing: -0.055em; }
  .hero-lead { margin-top: 22px; font-size: 16px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 14px; margin-top: 30px; }
  .hero-actions .button { width: 100%; }
  .hero-points { flex-wrap: wrap; gap: 12px 18px; margin-top: 26px; }
  .hero-visual { min-height: 430px; margin-top: 20px; }
  .visual-card { width: 100%; min-height: 420px; padding: 20px; border-radius: 28px; }
  .network-orbit { width: 245px; height: 245px; margin: 30px auto 20px; }
  .orbit-one { width: 190px; height: 190px; }
  .orbit-two { width: 245px; height: 245px; }
  .globe-core { width: 120px; height: 120px; }
  .globe-core::before { width: 60px; height: 114px; }
  .globe-core::after { width: 114px; height: 58px; }
  .floating-card { min-width: 148px; padding: 11px 12px; }
  .floating-card-speed { top: 82px; left: -7px; }
  .floating-card-device { right: -7px; bottom: 10px; }

  .trust-grid { padding: 25px 0; }
  .trust-grid > div { padding: 5px 18px; }
  .trust-grid strong { font-size: 17px; }
  .section { padding: 82px 0; }
  .section-heading { margin-bottom: 36px; }
  .section h2, .final-cta h2 { font-size: 36px; }
  .section-heading > p:last-child, .device-copy > p, .faq-intro > p { font-size: 15px; }
  .feature-card { padding: 26px; }

  .device-panel { min-height: 410px; }
  .device-window { top: 30px; width: 90%; min-height: 300px; }
  .window-content { padding: 38px 18px; }
  .device-phone { width: 145px; height: 300px; padding-top: 47px; border-width: 6px; border-radius: 28px; }
  .phone-shield { width: 56px; height: 64px; margin-top: 20px; }
  .steps li { padding: 24px; }

  .final-cta-inner { align-items: flex-start; flex-direction: column; min-height: auto; padding-top: 70px; padding-bottom: 70px; }
  .final-cta .button { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { align-items: flex-start; flex-direction: column; gap: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}