:root {
  color-scheme: light;
  --bg: #ffffff;
  --text: #10131a;
  --muted: #667085;
  --line: #e6e9ef;
  --soft: #f5f8fb;
  --soft-strong: #eef6f8;
  --cyan: #10bed2;
  --coral: #ff6b5f;
  --ink: #0b0f19;
  --shadow: 0 24px 80px rgba(16, 19, 26, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 72px);
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid rgba(230, 233, 239, 0.8);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
  font-weight: 800;
  letter-spacing: 0;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 18px;
  line-height: 1.1;
}

.brand small {
  color: var(--muted);
  font-size: 12px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
  color: #3c4350;
  font-size: 14px;
}

.nav a {
  padding: 8px 0;
}

.nav a:hover {
  color: var(--ink);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1fr);
  gap: clamp(36px, 5vw, 72px);
  align-items: center;
  min-height: calc(100vh - 80px);
  padding: clamp(44px, 7vw, 96px) clamp(20px, 5vw, 72px) 64px;
  overflow: hidden;
}

.hero-copy {
  max-width: 660px;
}

.domain {
  margin: 0 0 14px;
  color: var(--cyan);
  font-size: 16px;
  font-weight: 800;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 22px;
  font-size: clamp(42px, 7vw, 86px);
  line-height: 0.98;
  letter-spacing: 0;
}

.lead {
  max-width: 590px;
  margin-bottom: 32px;
  color: #3d4654;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  padding: 0 20px;
  font-size: 15px;
  font-weight: 700;
}

.button.primary {
  background: var(--ink);
  color: #fff;
}

.button.secondary {
  border: 1px solid var(--line);
  background: #fff;
}

.quick-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.quick-list li {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 12px;
  color: #3f4652;
  font-size: 14px;
}

.quick-list li:nth-child(2n) {
  border-color: rgba(16, 190, 210, 0.35);
  background: rgba(16, 190, 210, 0.08);
}

.hero-visual {
  position: relative;
}

.hero-visual::before {
  position: absolute;
  inset: 10% -8% -8% 8%;
  z-index: -1;
  border-radius: 32px;
  background: linear-gradient(135deg, rgba(16, 190, 210, 0.12), rgba(255, 107, 95, 0.12));
  content: "";
}

.hero-visual img {
  display: block;
  width: min(100%, 720px);
  max-height: 640px;
  margin-left: auto;
  object-fit: cover;
  object-position: top center;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.section {
  padding: 84px clamp(20px, 5vw, 72px);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 32px;
}

.section span,
.feature-copy span,
.contact span {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--coral);
  font-size: 14px;
  font-weight: 800;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.12;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.25;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
}

.service-grid article {
  min-height: 220px;
  padding: 30px;
  background: #fff;
}

.service-grid p,
.feature-copy p,
.contact p,
.section-heading p {
  color: var(--muted);
  font-size: 16px;
}

.feature-band {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(320px, 1fr);
  gap: 40px;
  align-items: center;
  background: var(--soft);
}

.feature-copy {
  max-width: 640px;
}

.roadmap {
  display: grid;
  gap: 12px;
}

.roadmap div {
  display: grid;
  grid-template-columns: 72px 1fr;
  align-items: center;
  min-height: 76px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 18px 22px;
}

.roadmap strong {
  color: var(--cyan);
  font-size: 22px;
}

.roadmap span {
  margin: 0;
  color: var(--text);
  font-size: 17px;
  font-weight: 700;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 420px);
  gap: 40px;
  align-items: start;
}

address {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px;
  background: var(--soft-strong);
  font-style: normal;
}

address p {
  margin-bottom: 10px;
  color: #2d3440;
}

address p:last-child {
  margin-bottom: 0;
}

.seo-links {
  background: #fff;
}

.keyword-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.keyword-list a {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 14px;
  color: #343c48;
  font-size: 15px;
  font-weight: 700;
}

.keyword-list a:hover {
  border-color: rgba(16, 190, 210, 0.5);
  background: rgba(16, 190, 210, 0.08);
}

.faq {
  background: var(--soft);
}

.faq-list {
  display: grid;
  gap: 12px;
  max-width: 900px;
}

.faq-list details {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 18px 22px;
}

.faq-list summary {
  cursor: pointer;
  color: var(--text);
  font-size: 18px;
  font-weight: 800;
}

.faq-list p {
  margin: 12px 0 0;
  color: var(--muted);
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding: 26px clamp(20px, 5vw, 72px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 900px) {
  .site-header {
    align-items: flex-start;
  }

  .nav {
    display: none;
  }

  .hero,
  .feature-band,
  .contact {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 42px;
  }

  .hero-visual img {
    width: 100%;
    max-height: 420px;
  }

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

@media (max-width: 520px) {
  .site-header {
    padding: 14px 16px;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
  }

  .hero,
  .section {
    padding-left: 16px;
    padding-right: 16px;
  }

  h1 {
    font-size: 42px;
  }

  .button {
    width: 100%;
  }

  .roadmap div {
    grid-template-columns: 56px 1fr;
    padding: 16px;
  }
}