:root {
  color-scheme: light;
  --page: #f7f9fc;
  --surface: #ffffff;
  --surface-blue: #eaf2fc;
  --ink: #10243c;
  --ink-soft: #40546b;
  --muted: #6d7d8f;
  --line: #d8e2ee;
  --blue: #175fca;
  --blue-deep: #124fa9;
  --radius: 18px;
  --shell: 1360px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  -webkit-font-smoothing: antialiased;
}

body, button { font-size: 16px; }

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

button { font-family: inherit; }

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

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

::selection { color: #fff; background: var(--blue); }

:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 4px;
}

.shell {
  width: min(calc(100% - 80px), var(--shell));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  z-index: 100;
  top: -100px;
  left: 24px;
  padding: 12px 18px;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
}

.skip-link:focus { top: 14px; }

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  border-bottom: 1px solid rgba(216, 226, 238, .65);
  background: rgba(247, 249, 252, .93);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.header-inner {
  display: grid;
  grid-template-columns: minmax(250px, 1fr) auto minmax(130px, 1fr);
  align-items: center;
  min-height: 78px;
  gap: 30px;
}

.brand { display: flex; align-items: center; gap: 16px; min-width: 0; }

.brand-mark, .footer-brand {
  white-space: nowrap;
  font-size: 29px;
  font-weight: 800;
  letter-spacing: -.09em;
  line-height: 1;
}

.brand-caption {
  overflow: hidden;
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .04em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.desktop-nav { display: flex; align-items: center; gap: clamp(20px, 2.5vw, 40px); }

.desktop-nav a, .header-contact {
  white-space: nowrap;
  font-size: 13px;
  font-weight: 600;
}

.desktop-nav a { color: var(--ink-soft); transition: color .2s ease; }

.desktop-nav a:hover, .footer-right a:hover { color: var(--blue); }

.header-contact {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 22px;
  padding: 12px 0 12px 18px;
  color: var(--blue-deep);
}

.header-contact span, .text-link span, .button span, .copy-address span { transition: transform .25s ease; }

.header-contact:hover span, .button:hover span, .copy-address:hover span { transform: translate(3px, -3px); }

.text-link:hover span { transform: translateX(4px); }

.menu-toggle, .mobile-nav { display: none; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, .91fr) minmax(0, 1.09fr);
  align-items: center;
  gap: clamp(44px, 6vw, 92px);
  min-height: min(810px, calc(100dvh - 78px));
  padding-block: 46px 80px;
}

.hero-copy { padding-bottom: 14px; }

.eyebrow, .section-kicker {
  margin: 0;
  color: var(--blue-deep);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
}

.eyebrow { display: flex; align-items: center; gap: 12px; }

.eyebrow-line { width: 30px; height: 1px; background: var(--blue); }

.hero h1 {
  margin: 31px 0 0;
  font-size: clamp(52px, 5.4vw, 84px);
  font-weight: 750;
  letter-spacing: -.075em;
  line-height: 1.17;
  white-space: nowrap;
}

.hero h1 span { color: var(--blue); }

.hero-description {
  max-width: 460px;
  margin: 30px 0 0;
  color: var(--ink-soft);
  font-size: 17px;
  line-height: 1.95;
}

.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 28px; margin-top: 40px; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  min-height: 54px;
  padding: 0 21px;
  border: 1px solid transparent;
  border-radius: 7px;
  white-space: nowrap;
  font-size: 14px;
  font-weight: 700;
  transition: background .2s ease, transform .2s ease;
}

.button:active { transform: translateY(1px); }

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

.button-primary:hover { background: var(--blue-deep); }

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
  color: var(--blue-deep);
  white-space: nowrap;
  font-size: 14px;
  font-weight: 700;
}

.hero-media {
  position: relative;
  height: min(660px, 62vw);
  min-height: 470px;
  overflow: hidden;
  border-radius: var(--radius);
  background: #c5d6e9;
  box-shadow: 0 28px 65px rgba(26, 67, 111, .1);
}

.hero-media::after {
  content: "";
  position: absolute;
  inset: 55% 0 0;
  background: linear-gradient(transparent, rgba(9, 33, 63, .32));
  pointer-events: none;
}

.hero-media img { width: 100%; height: 100%; object-fit: cover; object-position: 69% center; }

.hero-media-caption {
  position: absolute;
  z-index: 1;
  right: 30px;
  bottom: 28px;
  left: 30px;
  display: flex;
  align-items: center;
  gap: 20px;
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
}

.caption-line { flex: 1; height: 1px; background: rgba(255, 255, 255, .72); }

.intro { border-block: 1px solid var(--line); background: #f0f5fa; }

.intro-inner {
  display: grid;
  grid-template-columns: minmax(160px, .3fr) minmax(0, 1fr) minmax(240px, .54fr);
  align-items: start;
  gap: 52px;
  padding-block: 92px 96px;
}

.intro .section-kicker { padding-top: 14px; }

.intro h2 {
  margin: 0;
  font-size: clamp(34px, 3.2vw, 50px);
  font-weight: 680;
  letter-spacing: -.06em;
  line-height: 1.4;
}

.intro-inner > p:last-child {
  max-width: 320px;
  margin: 12px 0 0;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 2;
}

.section { padding-block: 132px; scroll-margin-top: 78px; }

.section-heading h2, .approach h2, .about h2, .contact h2 {
  margin: 26px 0 0;
  font-size: clamp(38px, 4vw, 60px);
  font-weight: 700;
  letter-spacing: -.068em;
  line-height: 1.32;
}

.services .section-heading { max-width: 720px; margin-bottom: 78px; }

.service-list { border-top: 1px solid var(--line); }

.service-row {
  display: grid;
  grid-template-columns: minmax(100px, .7fr) minmax(260px, 1.8fr) minmax(260px, 1.6fr) 28px;
  align-items: center;
  gap: 28px;
  min-height: 180px;
  padding: 26px 4px;
  border-bottom: 1px solid var(--line);
}

.service-category { align-self: start; padding-top: 27px; color: var(--blue-deep); font-size: 12px; font-weight: 700; }

.service-row h3 {
  margin: 0;
  font-size: clamp(25px, 2.5vw, 37px);
  font-weight: 680;
  letter-spacing: -.052em;
  line-height: 1.35;
}

.service-row p { max-width: 410px; margin: 0; color: var(--ink-soft); font-size: 15px; line-height: 1.9; }

.service-arrow { align-self: start; padding-top: 24px; color: var(--blue); font-size: 23px; }

.product { background: var(--surface-blue); }

.product-inner {
  display: grid;
  grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
  align-items: center;
  gap: clamp(60px, 9vw, 160px);
}

.product-copy { max-width: 550px; }

.product h2 {
  margin: 28px 0 0;
  font-size: clamp(50px, 5.6vw, 82px);
  font-weight: 750;
  letter-spacing: -.075em;
  line-height: 1.19;
}

.product-lead { margin: 38px 0 0; font-size: 20px; font-weight: 650; line-height: 1.65; }

.product-description { max-width: 460px; margin: 18px 0 26px; color: var(--ink-soft); font-size: 15px; line-height: 2; }

.product-visual {
  position: relative;
  min-height: 520px;
  padding: 64px 54px 48px;
  overflow: hidden;
  border: 1px solid rgba(23, 95, 202, .17);
  border-radius: var(--radius);
  background: linear-gradient(145deg, #fefefe 3%, #e8f1fc 100%);
  box-shadow: 0 28px 60px rgba(30, 78, 130, .08);
}

.product-visual::before {
  content: "";
  position: absolute;
  width: 470px;
  height: 470px;
  top: -180px;
  right: -150px;
  border: 1px solid rgba(23, 95, 202, .2);
  border-radius: 50%;
  box-shadow: 0 0 0 70px rgba(23, 95, 202, .035), 0 0 0 140px rgba(23, 95, 202, .025);
}

.product-logo-frame {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 170px;
  height: 170px;
  overflow: hidden;
  border-radius: 25px;
  background: #fff;
  box-shadow: 0 20px 45px rgba(23, 66, 112, .11);
}

.product-logo-frame img { width: 147px; height: 147px; object-fit: contain; }

.product-path {
  width: 1px;
  height: 62px;
  margin: 13px 0 0 85px;
  background: var(--blue);
  opacity: .5;
}

.domain-list {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  max-width: 520px;
}

.domain-list span {
  display: flex;
  align-items: center;
  min-height: 57px;
  padding: 0 19px;
  border: 1px solid #d2e2f5;
  border-radius: 8px;
  background: rgba(255, 255, 255, .82);
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
}

.approach { display: grid; grid-template-columns: minmax(300px, .9fr) minmax(0, 1.1fr); gap: 100px; }

.approach-heading { max-width: 550px; }

.approach-heading > p:last-child { max-width: 420px; margin: 28px 0 0; color: var(--ink-soft); font-size: 16px; line-height: 1.9; }

.approach-steps { border-top: 1px solid var(--line); }

.approach-step {
  display: grid;
  grid-template-columns: 80px minmax(130px, 1fr) minmax(190px, 1.15fr);
  gap: 20px;
  align-items: center;
  min-height: 142px;
  border-bottom: 1px solid var(--line);
}

.step-number { color: var(--blue); font-size: 13px; font-weight: 700; font-variant-numeric: tabular-nums; }

.approach-step h3 { margin: 0; font-size: 24px; font-weight: 670; letter-spacing: -.045em; }

.approach-step p { margin: 0; color: var(--ink-soft); font-size: 14px; line-height: 1.85; }

.about { border-block: 1px solid var(--line); background: #f0f5fa; }

.about-inner { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, .9fr); gap: 110px; }

.about-details > p { max-width: 530px; margin: 4px 0 50px; color: var(--ink-soft); font-size: 18px; line-height: 1.95; }

.about-facts { display: grid; gap: 0; border-top: 1px solid var(--line); }

.about-facts > div { display: grid; grid-template-columns: 115px 1fr; gap: 18px; padding: 20px 0; border-bottom: 1px solid var(--line); }

.about-facts span { color: var(--muted); font-size: 13px; }

.about-facts strong { font-size: 14px; font-weight: 650; }

.contact { padding-block: 125px; }

.contact-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(260px, .85fr);
  align-items: end;
  gap: 70px;
  min-height: 390px;
  padding: clamp(42px, 6vw, 84px);
  border-radius: var(--radius);
  background: #e5effc;
}

.contact h2 { margin-top: 20px; font-size: clamp(42px, 4.6vw, 69px); }

.contact-address { display: flex; flex-direction: column; align-items: flex-start; padding-bottom: 7px; }

.contact-address > span:first-child { color: var(--muted); font-size: 13px; }

.contact-address strong { margin-top: 14px; font-size: clamp(19px, 2vw, 26px); font-weight: 650; letter-spacing: -.035em; line-height: 1.5; }

.copy-address {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-height: 40px;
  margin-top: 23px;
  padding: 0;
  border: 0;
  border-bottom: 1px solid var(--blue);
  background: transparent;
  color: var(--blue-deep);
  cursor: pointer;
  font-size: 14px;
  font-weight: 700;
}

.copy-status { min-height: 20px; margin-top: 8px; color: var(--blue-deep); font-size: 12px; }

.clipboard-field { position: fixed; opacity: 0; pointer-events: none; }

.site-footer { border-top: 1px solid var(--line); background: var(--page); }

.footer-inner { display: flex; justify-content: space-between; gap: 36px; padding-block: 46px 52px; }

.footer-brand { font-size: 34px; }

.footer-inner p { margin: 18px 0 0; color: var(--muted); font-size: 12px; }

.footer-right { display: flex; flex-direction: column; align-items: flex-end; justify-content: space-between; gap: 38px; }

.footer-right nav { display: flex; gap: 31px; }

.footer-right a { color: var(--ink-soft); font-size: 12px; font-weight: 600; transition: color .2s ease; }

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

@keyframes hero-enter {
  from { opacity: .35; transform: translateY(15px); }
  to { opacity: 1; transform: none; }
}

.hero-copy { animation: hero-enter .75s ease both; }

.hero-media { animation: hero-enter .9s .08s ease both; }

@media (max-width: 1180px) {
  .header-inner { grid-template-columns: minmax(180px, 1fr) auto auto; gap: 20px; }
  .brand-caption { display: none; }
  .desktop-nav { gap: 22px; }
  .hero { gap: 40px; }
  .hero h1 { font-size: clamp(50px, 5.4vw, 68px); }
  .intro-inner { grid-template-columns: 150px 1fr; gap: 28px; }
  .intro-inner > p:last-child { grid-column: 2; max-width: 560px; margin-top: 0; }
  .service-row { grid-template-columns: 90px minmax(180px, 1.2fr) minmax(250px, 1.5fr) 22px; gap: 16px; }
  .product-inner { gap: 56px; }
  .approach { gap: 50px; }
  .approach-step { grid-template-columns: 45px 1fr; min-height: 130px; }
  .approach-step p { grid-column: 2; margin-top: -36px; align-self: end; padding-bottom: 24px; }
}

@media (max-width: 900px) {
  .shell { width: min(calc(100% - 48px), var(--shell)); }
  .header-inner { grid-template-columns: 1fr auto auto; min-height: 70px; }
  .desktop-nav { display: none; }
  .header-contact { margin-right: 10px; }
  .menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 38px;
    height: 38px;
    padding: 5px;
    border: 0;
    background: transparent;
    cursor: pointer;
  }
  .menu-toggle span { display: block; width: 25px; height: 2px; background: var(--ink); transition: transform .2s ease, opacity .2s ease; }
  .menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(7px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-7px) rotate(-45deg); }
  .mobile-nav:not([hidden]) { display: flex; flex-direction: column; padding: 10px 24px 25px; border-top: 1px solid var(--line); background: var(--page); }
  .mobile-nav a { padding: 12px 0; color: var(--ink-soft); font-size: 15px; font-weight: 600; }
  .hero { grid-template-columns: 1fr; min-height: 0; gap: 48px; padding-block: 75px 85px; }
  .hero-copy { padding-bottom: 0; }
  .hero h1 { font-size: clamp(52px, 8vw, 80px); }
  .hero-description { max-width: 580px; }
  .hero-media { height: 520px; min-height: 0; }
  .intro-inner { padding-block: 80px; }
  .section { padding-block: 100px; scroll-margin-top: 70px; }
  .service-row { grid-template-columns: 110px 1fr 25px; min-height: 155px; }
  .service-row p { grid-column: 2; grid-row: 2; padding-bottom: 12px; }
  .service-category { grid-row: span 2; padding-top: 9px; }
  .service-arrow { grid-column: 3; grid-row: 1; padding-top: 0; }
  .product-inner { grid-template-columns: 1fr; gap: 46px; }
  .product-visual { min-height: 500px; }
  .approach { grid-template-columns: 1fr; gap: 65px; }
  .approach-step { grid-template-columns: 80px 1fr 1.2fr; }
  .approach-step p { grid-column: auto; margin: 0; align-self: center; padding-bottom: 0; }
  .about-inner { gap: 50px; }
  .contact-panel { gap: 35px; }
}

@media (max-width: 680px) {
  .shell { width: min(calc(100% - 36px), var(--shell)); }
  .site-header { backdrop-filter: none; -webkit-backdrop-filter: none; }
  .header-inner { min-height: 65px; gap: 8px; }
  .brand-mark { font-size: 27px; }
  .header-contact { padding: 8px; margin-right: 2px; font-size: 12px; }
  .header-contact span { display: none; }
  .hero { gap: 38px; padding-block: 62px 66px; }
  .eyebrow, .section-kicker { font-size: 12px; }
  .hero h1 { margin-top: 24px; font-size: clamp(42px, 11vw, 61px); letter-spacing: -.068em; }
  .hero-description { margin-top: 24px; font-size: 15px; line-height: 1.85; }
  .hero-actions { align-items: flex-start; gap: 20px; margin-top: 30px; }
  .button { min-height: 51px; padding-inline: 17px; gap: 15px; font-size: 13px; }
  .text-link { font-size: 13px; }
  .hero-media { height: clamp(340px, 99vw, 480px); border-radius: 13px; }
  .hero-media img { object-position: 71% center; }
  .hero-media-caption { right: 20px; bottom: 20px; left: 20px; font-size: 11px; }
  .intro-inner { display: block; padding-block: 65px 70px; }
  .intro h2 { margin-top: 22px; font-size: clamp(32px, 8.5vw, 44px); }
  .intro-inner > p:last-child { margin-top: 22px; font-size: 14px; }
  .section { padding-block: 82px; scroll-margin-top: 65px; }
  .section-heading h2, .approach h2, .about h2, .contact h2 { margin-top: 22px; font-size: clamp(34px, 9vw, 47px); }
  .services .section-heading { margin-bottom: 48px; }
  .service-row { grid-template-columns: 1fr 24px; gap: 0 8px; padding: 25px 0 27px; }
  .service-category { grid-column: 1; grid-row: 1; padding: 0; margin-bottom: 14px; }
  .service-row h3 { grid-column: 1; grid-row: 2; font-size: 28px; }
  .service-row p { grid-column: 1; grid-row: 3; padding: 0; margin-top: 15px; font-size: 14px; }
  .service-arrow { grid-column: 2; grid-row: 2; font-size: 21px; }
  .product h2 { font-size: clamp(50px, 12vw, 68px); }
  .product-lead { margin-top: 26px; font-size: 17px; }
  .product-description { font-size: 14px; }
  .product-visual { min-height: 400px; padding: 39px 28px; }
  .product-logo-frame { width: 125px; height: 125px; border-radius: 20px; }
  .product-logo-frame img { width: 113px; height: 113px; }
  .product-path { height: 49px; margin-left: 62px; }
  .domain-list span { min-height: 52px; padding-inline: 12px; font-size: 12px; }
  .approach { gap: 45px; }
  .approach-heading > p:last-child { margin-top: 20px; font-size: 14px; }
  .approach-step { grid-template-columns: 46px 1fr; gap: 4px 12px; min-height: 117px; padding-block: 18px; }
  .approach-step h3 { font-size: 21px; }
  .approach-step p { grid-column: 2; font-size: 13px; }
  .about-inner { grid-template-columns: 1fr; gap: 32px; }
  .about-details > p { margin: 0 0 32px; font-size: 15px; }
  .about-facts > div { grid-template-columns: 1fr; gap: 8px; }
  .contact { padding-block: 72px; }
  .contact-panel { grid-template-columns: 1fr; min-height: 0; gap: 45px; padding: 37px 27px 30px; border-radius: 13px; }
  .contact-address strong { font-size: 21px; }
  .footer-inner { flex-direction: column; padding-block: 42px 48px; }
  .footer-right { align-items: flex-start; gap: 28px; }
  .footer-right nav { flex-wrap: wrap; gap: 15px 22px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}