:root {
  --navy-950: #050e1d;
  --navy-900: #07172b;
  --navy-850: #0a203a;
  --ink: #102842;
  --ink-soft: #5c7085;
  --blue: #176bff;
  --blue-deep: #0b52d9;
  --cyan: #61dceb;
  --surface: #f4f7fb;
  --surface-blue: #eef5fb;
  --line: #dce5ed;
  --white: #fff;
  --container: 1200px;
  --shadow: 0 24px 60px rgba(0, 15, 40, .18);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }

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

body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }

.container { width: min(calc(100% - 48px), var(--container)); margin-inline: auto; }
.section { padding: 112px 0; }

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 8px;
  left: 8px;
  padding: 10px 14px;
  color: var(--white);
  background: var(--navy-900);
  transform: translateY(-140%);
}

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

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  height: 76px;
  border-bottom: 1px solid rgba(220, 229, 237, .9);
  background: rgba(255, 255, 255, .96);
  backdrop-filter: blur(14px);
}

.header-bar {
  display: flex;
  height: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand { flex: 0 0 auto; }
.brand img { width: 170px; height: 48px; object-fit: contain; object-position: left center; }
.site-nav { display: flex; height: 100%; align-items: center; gap: clamp(26px, 3.2vw, 44px); }

.site-nav a {
  position: relative;
  display: inline-flex;
  height: 100%;
  align-items: center;
  color: #40566d;
  font-size: 14px;
  transition: color .2s ease;
}

.site-nav a::after {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 2px;
  content: "";
  background: var(--blue);
  transform: scaleX(0);
  transition: transform .2s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a.is-current { color: var(--blue); }

.site-nav a:hover::after,
.site-nav a:focus-visible::after,
.site-nav a.is-current::after { transform: scaleX(1); }
.menu-toggle { display: none; }

.hero {
  position: relative;
  overflow: hidden;
  color: var(--white);
  background:
    radial-gradient(circle at 82% 8%, rgba(35, 111, 255, .26), transparent 34%),
    radial-gradient(circle at 18% 96%, rgba(45, 211, 226, .1), transparent 30%),
    var(--navy-950);
}

.hero::after {
  position: absolute;
  right: -12vw;
  bottom: -38vw;
  width: 64vw;
  height: 64vw;
  content: "";
  border: 1px solid rgba(97, 220, 235, .1);
  border-radius: 50%;
  pointer-events: none;
}

.hero-layout {
  position: relative;
  z-index: 1;
  min-height: 708px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(430px, .92fr);
  align-items: center;
  gap: clamp(52px, 6vw, 88px);
  padding-top: 70px;
  padding-bottom: 70px;
}

.hero-copy { max-width: 650px; }

.hero-kicker,
.section-label {
  margin: 0 0 24px;
  color: var(--blue);
  font-size: 11px;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: .19em;
}

.hero-kicker { color: var(--cyan); }

.hero h1 {
  margin: 0;
  font-size: clamp(52px, 4.6vw, 68px);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -.045em;
}

.hero h1 span { display: block; }
.hero h1 span:last-child { margin-top: 8px; color: #4389ff; }

.hero-summary {
  max-width: 620px;
  margin: 30px 0 0;
  color: rgba(229, 239, 248, .74);
  font-size: 17px;
  line-height: 1.9;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 38px; }

.button {
  display: inline-flex;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 0 25px;
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 600;
  transition: transform .2s ease, background .2s ease, border-color .2s ease;
}

.button:hover { transform: translateY(-2px); }
.button-primary { color: var(--white); background: var(--blue); box-shadow: 0 12px 30px rgba(23, 107, 255, .25); }
.button-primary:hover { background: #2d7aff; }
.button-ghost { border-color: rgba(255, 255, 255, .28); color: var(--white); background: rgba(255, 255, 255, .03); }
.button-ghost:hover { border-color: rgba(255, 255, 255, .58); background: rgba(255, 255, 255, .07); }

.hero-strengths {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  margin: 46px 0 0;
  padding: 0;
  color: rgba(213, 228, 241, .64);
  list-style-position: inside;
}

.hero-strengths li { font-size: 12px; }
.hero-strengths li::marker { color: var(--cyan); }
.hero-visual { position: relative; padding: 18px 18px 44px; }

.hero-visual figure {
  position: relative;
  overflow: hidden;
  aspect-ratio: 1 / 1.05;
  margin: 0;
  border: 1px solid rgba(255, 255, 255, .14);
  box-shadow: var(--shadow);
}

.hero-visual figure::after {
  position: absolute;
  inset: 0;
  content: "";
  background: linear-gradient(180deg, rgba(4, 14, 29, .02) 48%, rgba(4, 14, 29, .5));
}

.hero-visual figure img { width: 100%; height: 100%; object-fit: cover; object-position: 62% center; }

.hero-metrics { position: absolute; inset: 0; pointer-events: none; }

.hero-metric {
  position: absolute;
  min-width: 142px;
  padding: 16px 18px;
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 10px;
  background: rgba(8, 31, 55, .96);
  box-shadow: 0 16px 42px rgba(0, 0, 0, .32);
}

.hero-metric-top { top: 0; right: 0; }
.hero-metric-bottom { bottom: 0; left: 0; }
.hero-metric span { display: block; margin-bottom: 6px; color: rgba(222, 235, 246, .64); font-size: 10px; }
.hero-metric strong { display: block; color: var(--white); font-size: 19px; line-height: 1.2; }

.section-heading h2,
.about-content h2,
.contact-heading h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(36px, 3.4vw, 50px);
  line-height: 1.2;
  letter-spacing: -.04em;
}

.centered-heading { max-width: 790px; margin: 0 auto 52px; text-align: center; }
.centered-heading > p:last-child { margin: 22px auto 0; color: var(--ink-soft); font-size: 16px; line-height: 1.9; }

.capabilities { background: var(--white); }
.capability-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }

.capability-card {
  min-width: 0;
  padding: 36px 34px 34px;
  border: 1px solid #e4eaf0;
  border-radius: 12px;
  background: var(--surface);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}

.capability-card:hover { border-color: #cfe0f2; box-shadow: 0 20px 48px rgba(15, 51, 86, .1); transform: translateY(-5px); }

.capability-index { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin-bottom: 34px; }
.capability-index span { color: var(--blue); font-size: 27px; font-weight: 700; }
.capability-index small { color: #8b9cad; font-size: 9px; font-weight: 700; letter-spacing: .16em; }
.capability-card h3 { margin: 0 0 18px; font-size: 23px; line-height: 1.45; }
.capability-card > p { min-height: 156px; margin: 0; color: var(--ink-soft); font-size: 14px; line-height: 1.85; }

.capability-card ul {
  display: grid;
  gap: 10px;
  margin: 27px 0 0;
  padding: 24px 0 0 18px;
  border-top: 1px solid var(--line);
  color: #3e566e;
}

.capability-card li { padding-left: 3px; font-size: 13px; line-height: 1.6; }
.capability-card li::marker { color: var(--blue); }

.scenarios {
  color: var(--white);
  background: var(--navy-900);
}

.heading-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 70px; margin-bottom: 48px; }
.heading-copy > p { max-width: 610px; margin: 18px 0 0; color: var(--ink-soft); font-size: 16px; line-height: 1.9; }
.heading-light h2 { color: var(--white); }
.heading-light .section-label { color: var(--cyan); }
.heading-light .heading-copy > p { color: rgba(218, 231, 243, .65); }
.scenario-link { flex: 0 0 auto; margin-bottom: 5px; color: #53a4ff; font-size: 14px; font-weight: 600; }
.scenario-link:hover, .scenario-link:focus-visible { color: var(--white); }
.scenario-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }

.scenario-card {
  position: relative;
  min-width: 0;
  overflow: hidden;
  aspect-ratio: 4 / 3.35;
  border: 1px solid rgba(255, 255, 255, .1);
  background: var(--navy-850);
}

.scenario-card::after {
  position: absolute;
  inset: 0;
  content: "";
  background: linear-gradient(180deg, rgba(5, 15, 30, .02) 34%, rgba(5, 15, 30, .93) 100%);
}

.scenario-card img { width: 100%; height: 100%; object-fit: cover; transition: transform .55s ease; }
.scenario-card:hover img { transform: scale(1.035); }

.scenario-copy {
  position: absolute;
  z-index: 1;
  right: 0;
  bottom: 0;
  left: 0;
  padding: 30px 28px;
}

.scenario-copy h3 { margin: 0; font-size: 21px; line-height: 1.4; }

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

.about-layout {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
  align-items: center;
  gap: 70px 88px;
}

.about-visual { position: relative; min-width: 0; }
.about-visual > img { width: 100%; aspect-ratio: 5 / 4; object-fit: cover; box-shadow: 0 22px 54px rgba(8, 41, 74, .13); }

.about-content > .section-label { margin-bottom: 20px; }
.about-lead { margin: 28px 0 17px; color: var(--ink); font-size: 16px; font-weight: 500; line-height: 1.9; }
.about-content > p:not(.section-label):not(.about-lead) { margin: 0; color: var(--ink-soft); font-size: 15px; line-height: 1.9; }

.about-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 34px;
  padding: 0;
  border-top: 1px solid #cad8e4;
}

.about-fact { display: grid; gap: 7px; padding: 23px 18px 0 0; }
.about-fact strong { color: var(--blue); font-size: 28px; line-height: 1; }
.about-fact span { color: var(--ink-soft); font-size: 12px; line-height: 1.5; }

.contact { background: var(--white); }
.contact-wrap { max-width: 980px; }

.contact-heading { margin-bottom: 40px; }
.contact-heading > p:last-child { margin: 20px auto 0; color: var(--ink-soft); font-size: 15px; line-height: 1.85; }
.cooperation-form { display: grid; gap: 24px; max-width: 860px; margin: 0 auto; padding: 38px; border: 1px solid #e4eaf0; border-radius: 14px; background: var(--surface); box-shadow: 0 18px 48px rgba(15, 51, 86, .08); }
.form-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
.cooperation-form label { display: grid; gap: 9px; color: var(--ink); font-size: 13px; font-weight: 600; }
.cooperation-form input, .cooperation-form textarea { width: 100%; border: 1px solid #cdd9e4; border-radius: 8px; color: var(--ink); background: var(--white); font: inherit; font-size: 14px; outline: none; transition: border-color .2s ease, box-shadow .2s ease; }
.cooperation-form input { min-height: 52px; padding: 0 16px; }
.cooperation-form textarea { min-height: 142px; padding: 15px 16px; line-height: 1.7; resize: vertical; }
.cooperation-form input:focus, .cooperation-form textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(23, 107, 255, .12); }
.form-submit { min-height: 54px; border: 0; border-radius: 8px; color: var(--white); background: var(--blue); box-shadow: 0 10px 22px rgba(23, 107, 255, .22); font-weight: 600; cursor: pointer; transition: background .2s ease, transform .2s ease; }
.form-submit:hover, .form-submit:focus-visible { background: #2d7aff; transform: translateY(-1px); }
.form-status { min-height: 20px; margin: -10px 0 0; color: var(--ink-soft); font-size: 12px; text-align: center; }

.site-footer { color: rgba(221, 235, 246, .7); background: #040e1c; }
.footer-columns { display: grid; grid-template-columns: 1fr .7fr 1.35fr; gap: 70px; padding-top: 68px; padding-bottom: 54px; }
.footer-brand img { width: 178px; height: 48px; object-fit: contain; object-position: left center; filter: brightness(0) invert(1); }
.footer-brand p { margin: 18px 0 0; font-size: 13px; }
.footer-nav { display: grid; grid-template-columns: repeat(2, max-content); align-content: start; gap: 18px 34px; }
.footer-nav a { font-size: 13px; transition: color .2s ease; }
.footer-nav a:hover { color: var(--white); }
.footer-company { display: grid; align-content: start; gap: 18px; }
.footer-company strong { color: var(--white); font-size: 14px; font-weight: 600; }
.footer-contact-list { display: grid; gap: 11px; margin: 0; }
.footer-contact-list > div { display: grid; grid-template-columns: 20px minmax(0, 1fr); align-items: start; gap: 12px; }
.footer-contact-list dt { display: grid; width: 20px; height: 22px; place-items: center; margin: 0; }
.footer-contact-icon { display: block; width: 15px; height: 15px; color: var(--cyan); }
.footer-contact-list dd { min-width: 0; margin: 0; color: rgba(221, 235, 246, .7); font-size: 12px; line-height: 1.8; overflow-wrap: anywhere; }
.footer-company a { color: inherit; }
.footer-company a:hover, .footer-company a:focus-visible { color: var(--white); }
.footer-bottom { display: grid; min-height: 66px; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); align-items: center; gap: 24px; border-top: 1px solid rgba(255, 255, 255, .1); font-size: 11px; }
.footer-bottom p { justify-self: start; margin: 0; }
.footer-bottom a { color: rgba(221, 235, 246, .78); transition: color .2s ease; }
.footer-bottom a:hover, .footer-bottom a:focus-visible { color: var(--white); }
.footer-icp { justify-self: center; white-space: nowrap; }
.footer-back-to-top { justify-self: end; }

[data-reveal] { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }
.capability-card[data-reveal],
.scenario-card[data-reveal] { transform: none; }

@media (max-width: 1100px) {
  .section { padding: 96px 0; }
  .hero-layout { min-height: 650px; grid-template-columns: minmax(0, 1fr) minmax(390px, .88fr); gap: 48px; }
  .hero h1 { font-size: clamp(46px, 5.1vw, 58px); }
  .hero-summary { font-size: 16px; }
  .capability-card { padding: 32px 28px; }
  .capability-card > p { min-height: 128px; }
  .about-layout { gap: 64px 58px; }
}

@media (max-width: 900px) {
  .hero-layout { grid-template-columns: 1fr; gap: 56px; padding-top: 84px; padding-bottom: 88px; }
  .hero-copy { max-width: 720px; }
  .hero-visual { width: min(720px, 94%); margin-left: auto; }
  .hero-visual figure { aspect-ratio: 16 / 10; }
  .capability-grid { grid-template-columns: 1fr; }
  .capability-card > p { min-height: auto; }
  .capability-index { margin-bottom: 34px; }
  .scenario-grid { grid-template-columns: 1fr; }
  .scenario-card { aspect-ratio: 16 / 8.5; }
  .about-layout { grid-template-columns: 1fr; }
  .about-visual { width: min(720px, 94%); }
}

@media (max-width: 820px) {
  html { scroll-padding-top: 68px; }
  .site-header { height: 68px; }
  .brand img { width: 148px; height: 42px; }
  .menu-toggle { position: relative; z-index: 102; display: inline-flex; width: 42px; height: 42px; flex: 0 0 42px; align-items: center; justify-content: center; padding: 0; border: 0; color: var(--ink); background: transparent; cursor: pointer; }
  .menu-icon { display: grid; width: 19px; gap: 5px; }
  .menu-icon i { width: 100%; height: 1.5px; display: block; background: currentColor; transition: transform .2s ease; }
  .menu-toggle[aria-expanded="true"] .menu-icon i:first-child { transform: translateY(3.25px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] .menu-icon i:last-child { transform: translateY(-3.25px) rotate(-45deg); }
  .site-nav { position: fixed; z-index: 101; inset: 68px 0 auto; display: grid; visibility: hidden; height: auto; max-height: 0; overflow: hidden; align-content: start; gap: 0; border-bottom: 1px solid var(--line); background: var(--white); opacity: 0; transition: max-height .25s ease, opacity .2s ease, visibility .2s ease; }
  .site-nav.is-menu-open { visibility: visible; max-height: calc(100vh - 68px); opacity: 1; }
  .site-nav a { width: min(calc(100% - 48px), var(--container)); min-height: 60px; height: auto; margin-inline: auto; border-bottom: 1px solid #edf1f4; }
  .site-nav a:last-child { border-bottom: 0; }
  .site-nav a::after { display: none; }
  .heading-row { align-items: flex-start; flex-direction: column; gap: 24px; }
  .heading-copy > p { max-width: 650px; }
  .footer-columns { grid-template-columns: 1fr 1fr; }
  .footer-company { grid-column: 1 / -1; padding-top: 30px; border-top: 1px solid rgba(255, 255, 255, .1); }
}

@media (max-width: 720px) {
  .container { width: min(calc(100% - 36px), var(--container)); }
  .section { padding: 72px 0; }
  .hero-layout { gap: 44px; padding-top: 66px; padding-bottom: 72px; }
  .hero-kicker, .section-label { margin-bottom: 17px; font-size: 9px; letter-spacing: .15em; }
  .hero h1 { font-size: clamp(38px, 10.4vw, 45px); line-height: 1.2; letter-spacing: -.04em; }
  .hero h1 span:last-child { margin-top: 4px; }
  .hero-summary { margin-top: 25px; font-size: 15px; line-height: 1.85; }
  .hero-actions { margin-top: 30px; }
  .button { min-height: 50px; padding: 0 20px; }
  .hero-strengths { display: grid; gap: 10px; margin-top: 34px; padding-left: 2px; }
  .hero-visual { width: 100%; padding: 12px 12px 42px; }
  .hero-visual figure { aspect-ratio: 4 / 3; }
  .hero-metric { min-width: 126px; padding: 13px 15px; }
  .hero-metric strong { font-size: 16px; }
  .section-heading h2, .about-content h2, .contact-heading h2 { font-size: 34px; }
  .centered-heading { margin-bottom: 36px; text-align: left; }
  .centered-heading > p:last-child { margin-top: 18px; font-size: 15px; }
  .capability-grid { gap: 16px; }
  .capability-card { padding: 28px 24px; }
  .capability-index { margin-bottom: 28px; }
  .capability-card h3 { font-size: 21px; }
  .scenario-grid { gap: 16px; }
  .scenario-card { aspect-ratio: 4 / 3.25; }
  .scenario-copy { padding: 24px 22px; }
  .scenario-copy h3 { font-size: 20px; }
  .about-layout { gap: 52px; }
  .about-visual { width: 100%; }
  .about-visual > img { aspect-ratio: 4 / 3; }
  .about-lead { margin-top: 22px; font-size: 16px; }
  .about-fact { padding-right: 8px; }
  .about-fact strong { font-size: 24px; }
  .contact-heading { margin-bottom: 32px; }
  .cooperation-form { gap: 20px; padding: 26px 20px; }
  .form-row { grid-template-columns: 1fr; gap: 20px; }
  .footer-columns { grid-template-columns: 1fr; gap: 34px; padding-top: 52px; padding-bottom: 42px; }
  .footer-nav { grid-template-columns: repeat(2, 1fr); }
  .footer-company { grid-column: auto; padding-top: 28px; }
  .footer-contact-list > div { grid-template-columns: 20px minmax(0, 1fr); gap: 12px; }
  .footer-bottom { grid-template-columns: 1fr; justify-items: center; gap: 10px; padding: 18px 0; text-align: center; }
  .footer-bottom p, .footer-icp, .footer-back-to-top { justify-self: center; }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
  [data-reveal] { opacity: 1; transform: none; }
}