:root {
  --bg: #030a14;
  --bg-soft: #071325;
  --panel: rgba(9, 21, 38, 0.84);
  --panel-soft: rgba(9, 21, 38, 0.64);
  --line: rgba(102, 142, 197, 0.22);
  --text: #f3f7fb;
  --muted: #9da9bb;
  --muted-strong: #c7d3e4;
  --accent: #39b6ff;
  --accent-soft: rgba(57, 182, 255, 0.16);
  --white-soft: rgba(255, 255, 255, 0.92);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "Segoe UI", "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
  background:
    radial-gradient(circle at 72% 18%, rgba(58, 142, 255, 0.18), transparent 22%),
    radial-gradient(circle at 20% 18%, rgba(255, 255, 255, 0.03), transparent 14%),
    linear-gradient(180deg, #020710 0%, #050d19 45%, #071120 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(circle, rgba(255, 255, 255, 0.85) 0 1px, transparent 1.5px),
    radial-gradient(circle, rgba(57, 182, 255, 0.7) 0 1px, transparent 1.6px);
  background-size: 180px 180px, 260px 260px;
  background-position: 0 0, 60px 40px;
  opacity: 0.16;
}

.page-shell {
  position: relative;
  overflow: hidden;
  width: min(1280px, calc(100% - 24px));
  margin: 12px auto;
  padding: 18px 18px 24px;
  border: 1px solid rgba(81, 116, 165, 0.2);
  border-radius: 12px;
  background:
    linear-gradient(180deg, rgba(4, 11, 21, 0.95), rgba(6, 15, 28, 0.97));
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.3);
}

.star-layer,
.glow {
  position: absolute;
  pointer-events: none;
}

.star-layer {
  inset: 0;
  background:
    radial-gradient(circle at 18% 22%, rgba(255, 255, 255, 0.06), transparent 10%),
    radial-gradient(circle at 48% 12%, rgba(57, 182, 255, 0.06), transparent 14%),
    radial-gradient(circle at 76% 34%, rgba(255, 255, 255, 0.05), transparent 10%);
}

.glow-left {
  left: -80px;
  top: 60px;
  width: 240px;
  height: 240px;
  background: radial-gradient(circle, rgba(28, 102, 186, 0.16), transparent 68%);
  filter: blur(10px);
}

.glow-right {
  right: -90px;
  top: -60px;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(89, 150, 255, 0.18), transparent 68%);
  filter: blur(18px);
}

.topbar,
.hero,
.operate-section,
.impact-section {
  position: relative;
  z-index: 1;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 4px 2px 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--white-soft);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 600;
}

.brand-logo {
  width: 18px;
  height: 18px;
  object-fit: contain;
  border-radius: 4px;
}

.brand-name {
  letter-spacing: 0.01em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav a {
  color: rgba(232, 239, 247, 0.72);
  text-decoration: none;
  font-size: 0.7rem;
}

.nav a:hover {
  color: #ffffff;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.language-switcher {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 8px;
  border: 1px solid rgba(88, 122, 170, 0.2);
  border-radius: 8px;
  background: rgba(7, 18, 32, 0.82);
}

.language-switcher select {
  border: 0;
  outline: 0;
  background: transparent;
  color: rgba(232, 239, 247, 0.92);
  font-size: 0.72rem;
  cursor: pointer;
}

.language-switcher option {
  color: #071121;
}

.demo-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 32px;
  padding: 0 14px;
  border: 1px solid rgba(137, 160, 193, 0.26);
  border-radius: 8px;
  color: #f6fbff;
  text-decoration: none;
  font-size: 0.72rem;
  font-weight: 600;
  background: rgba(10, 20, 34, 0.72);
}

.hero {
  display: grid;
  grid-template-columns: 0.88fr 1.12fr;
  gap: 8px;
  align-items: start;
  min-height: 420px;
  padding: 14px 0 18px;
}

.hero-copy {
  padding-top: 20px;
}

.eyebrow-pill {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  border: 1px solid rgba(119, 146, 184, 0.2);
  border-radius: 999px;
  color: rgba(232, 239, 247, 0.76);
  font-size: 0.66rem;
  background: rgba(10, 20, 34, 0.78);
}

.hero h1 {
  margin: 16px 0 14px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.6rem, 4.7vw, 4.4rem);
  line-height: 0.95;
  font-weight: 500;
  letter-spacing: -0.04em;
  max-width: 7.2ch;
}

.hero-text {
  max-width: 34ch;
  margin: 0 0 22px;
  color: var(--muted);
  line-height: 1.65;
  font-size: 0.94rem;
}

.hero-actions {
  display: flex;
  gap: 10px;
}

.ghost-button,
.solid-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 18px;
  border-radius: 8px;
  text-decoration: none;
  font-size: 0.78rem;
  font-weight: 600;
}

.ghost-button {
  border: 1px solid rgba(102, 138, 188, 0.22);
  color: #eef5fb;
  background: rgba(10, 20, 35, 0.72);
}

.ghost-button::before {
  content: "";
  width: 12px;
  height: 12px;
  margin-right: 8px;
  border: 1px solid rgba(255, 255, 255, 0.46);
  border-radius: 50%;
  box-shadow: inset 3px 0 0 0 rgba(255, 255, 255, 0.78);
}

.solid-button {
  color: #06111d;
  background: #ffffff;
}

.hero-visual {
  position: relative;
  min-height: 390px;
}

.planet-ring {
  position: absolute;
  top: -54px;
  right: -18px;
  width: 270px;
  height: 270px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 34% 50%, rgba(7, 18, 33, 0) 0 52%, rgba(183, 224, 255, 0.98) 54%, rgba(130, 194, 255, 0.92) 57%, rgba(32, 72, 136, 0.18) 63%, rgba(7, 18, 33, 0) 67%);
  filter: drop-shadow(0 0 34px rgba(118, 191, 255, 0.22));
}

.planet-core {
  position: absolute;
  top: -30px;
  right: 18px;
  width: 204px;
  height: 204px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 34%, rgba(255, 255, 255, 0.12), rgba(10, 27, 55, 0.92) 46%, rgba(4, 12, 24, 1) 78%);
}

.energy-road {
  position: absolute;
  left: 34px;
  right: 0;
  bottom: 18px;
  height: 250px;
}

.road {
  position: absolute;
  display: block;
  height: 2px;
  transform-origin: right center;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(29, 104, 196, 0), rgba(96, 196, 255, 0.5) 36%, rgba(146, 224, 255, 0.95) 72%, rgba(215, 247, 255, 0.98));
  box-shadow: 0 0 14px rgba(71, 193, 255, 0.28);
}

.road-a {
  left: 30px;
  bottom: 18px;
  width: 500px;
  transform: rotate(-24deg);
}

.road-b {
  left: 42px;
  bottom: 46px;
  width: 460px;
  transform: rotate(-18deg);
}

.road-c {
  left: 90px;
  bottom: 76px;
  width: 380px;
  transform: rotate(-12deg);
}

.spark {
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #c8f5ff;
  box-shadow: 0 0 16px rgba(103, 214, 255, 0.92);
}

.spark-a {
  right: 208px;
  bottom: 138px;
}

.spark-b {
  right: 240px;
  bottom: 122px;
}

.spark-c {
  right: 170px;
  bottom: 150px;
}

.operate-section {
  padding: 8px 0 10px;
}

.section-heading {
  text-align: center;
}

.section-heading h2 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.55rem, 2vw, 2rem);
  font-weight: 500;
}

.section-heading p {
  margin: 10px auto 0;
  color: var(--muted);
  max-width: 52ch;
  font-size: 0.82rem;
}

.icon-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin-top: 26px;
}

.icon-card {
  position: relative;
  text-align: center;
  overflow: visible;
}

.icon-circle {
  position: relative;
  width: 54px;
  height: 54px;
  margin: 0 auto 16px;
  border: 1px solid rgba(106, 143, 192, 0.36);
  border-radius: 50%;
  background: radial-gradient(circle at 50% 40%, rgba(255, 255, 255, 0.06), rgba(10, 20, 34, 0.96));
  box-shadow:
    0 0 0 6px rgba(57, 182, 255, 0.04),
    0 0 26px rgba(44, 128, 221, 0.16);
}

.icon-shape {
  position: absolute;
  inset: 50% auto auto 50%;
  width: 16px;
  height: 16px;
  transform: translate(-50%, -50%);
}

.icon-connect {
  border: 1px solid rgba(240, 247, 255, 0.82);
  border-radius: 50%;
}

.icon-connect::before,
.icon-connect::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  background: rgba(240, 247, 255, 0.92);
}

.icon-connect::before {
  top: -5px;
  left: 5px;
  width: 4px;
  height: 4px;
}

.icon-connect::after {
  bottom: -5px;
  right: 5px;
  width: 4px;
  height: 4px;
}

.icon-understand {
  border: 1px solid rgba(240, 247, 255, 0.82);
  border-radius: 3px;
}

.icon-understand::before,
.icon-understand::after {
  content: "";
  position: absolute;
  background: rgba(240, 247, 255, 0.92);
}

.icon-understand::before {
  left: 3px;
  right: 3px;
  top: 4px;
  height: 2px;
}

.icon-understand::after {
  left: 7px;
  right: 7px;
  bottom: 4px;
  height: 2px;
}

.icon-automate {
  border: 1px solid rgba(240, 247, 255, 0.82);
  transform: translate(-50%, -50%) rotate(45deg);
}

.icon-automate::before {
  content: "";
  position: absolute;
  inset: 3px;
  border: 1px solid rgba(240, 247, 255, 0.74);
}

.icon-optimize {
  border: 1px dashed rgba(240, 247, 255, 0.82);
  border-radius: 50%;
}

.icon-optimize::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 4px;
  height: 4px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: rgba(240, 247, 255, 0.92);
}

.flow-line {
  position: absolute;
  top: 26px;
  right: -40px;
  width: 104px;
  height: 12px;
  opacity: 0.96;
  background: none;
}

.flow-line,
.flow-line::before,
.flow-line::after {
  background-repeat: no-repeat;
}

.flow-line::before,
.flow-line::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.flow-line::before {
  background:
    linear-gradient(90deg, transparent 0%, rgba(70, 194, 255, 0.1) 18%, rgba(158, 235, 255, 0.92) 50%, rgba(70, 194, 255, 0.1) 82%, transparent 100%),
    linear-gradient(90deg, transparent 0%, rgba(42, 166, 245, 0.08) 22%, rgba(118, 219, 255, 0.6) 50%, rgba(42, 166, 245, 0.08) 78%, transparent 100%);
  background-size: 100% 1px, 84% 1px;
  background-position: center 4px, center 7px;
  filter: blur(0.8px);
}

.flow-line::after {
  background:
    radial-gradient(circle at 20% 50%, rgba(187, 241, 255, 0.9) 0 4%, transparent 9%),
    radial-gradient(circle at 80% 50%, rgba(187, 241, 255, 0.9) 0 4%, transparent 9%),
    linear-gradient(90deg, transparent 0%, rgba(70, 194, 255, 0.16) 16%, rgba(184, 241, 255, 0.98) 50%, rgba(70, 194, 255, 0.16) 84%, transparent 100%);
  background-size: 100% 100%, 100% 100%, 76% 1px;
  background-position: center center, center center, center 5.5px;
  filter: blur(0.35px);
}

.icon-card:nth-child(2) .flow-line::before,
.icon-card:nth-child(2) .flow-line::after {
  transform: translateY(1px);
}

.icon-card:nth-child(3) .flow-line::before,
.icon-card:nth-child(3) .flow-line::after {
  transform: translateY(-1px);
}

.icon-card:last-child .flow-line {
  display: none;
}

.icon-card h3 {
  margin: 0 0 8px;
  color: #f4f8fd;
  font-size: 0.96rem;
}

.icon-card p {
  margin: 0 auto;
  max-width: 18ch;
  color: var(--muted);
  line-height: 1.5;
  font-size: 0.78rem;
}

.impact-section {
  margin-top: 18px;
  padding: 18px 12px 6px;
  border: 1px solid rgba(80, 113, 158, 0.22);
  border-radius: 10px;
  background: linear-gradient(180deg, rgba(8, 18, 33, 0.7), rgba(7, 16, 29, 0.92));
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.feature-card {
  min-height: 118px;
  padding: 14px 14px 16px;
  border: 1px solid rgba(81, 112, 156, 0.28);
  border-radius: 8px;
  background: rgba(10, 20, 35, 0.72);
}

.feature-label {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  color: #f5f9ff;
  font-size: 0.82rem;
}

.feature-icon {
  width: 14px;
  height: 14px;
  border: 1px solid rgba(197, 220, 244, 0.8);
  border-radius: 3px;
  box-shadow: inset 0 0 0 2px rgba(8, 20, 35, 0.78);
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
  font-size: 0.8rem;
}

@media (max-width: 1080px) {
  .topbar,
  .hero,
  .icon-row,
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .topbar {
    display: grid;
    justify-content: stretch;
  }

  .nav {
    flex-wrap: wrap;
  }

  .hero {
    gap: 20px;
  }

  .hero-visual {
    min-height: 300px;
  }

  .icon-row,
  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .flow-line {
    display: none;
  }
}

@media (max-width: 700px) {
  .page-shell {
    width: min(100% - 10px, 100%);
    margin: 5px auto;
    padding: 14px;
  }

  .topbar-actions {
    flex-wrap: wrap;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .icon-row,
  .feature-grid {
    grid-template-columns: 1fr;
  }
}