:root {
  --blue: #0562c7;
  --blue-2: #0f73df;
  --navy: #08294f;
  --navy-2: #061c35;
  --text: #15283d;
  --muted: #607288;
  --line: #dfe7ef;
  --soft: #f3f7fb;
  --white: #ffffff;
  --gold: #d9a43b;
  --radius: 18px;
  --shadow: 0 18px 45px rgba(7, 37, 69, .10);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background: #fff;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.shell { width: min(1180px, calc(100% - 48px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: 76px;
  background: rgba(255,255,255,.96);
  border-bottom: 1px solid rgba(216,227,238,.88);
  backdrop-filter: blur(14px);
}
.nav-wrap { height: 100%; display: flex; align-items: center; gap: 34px; }
.brand { width: 158px; overflow: hidden; }
.brand img { width: 158px; height: 50px; object-fit: cover; object-position: 50% 12%; }
.nav { margin-left: auto; display: flex; align-items: stretch; height: 100%; gap: 28px; }
.nav a { display: flex; align-items: center; position: relative; font-size: 14px; color: #31465c; }
.nav a:hover, .nav a.active { color: var(--blue); }
.nav a.active::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 3px; background: var(--blue); }
.nav-cta { padding: 11px 18px; border: 1px solid #b9cce0; border-radius: 999px; color: var(--navy); font-size: 14px; }

.hero { position: relative; min-height: 95px; background: var(--navy-2); overflow: hidden; }
.hero-image { position: absolute; inset: 0 0 0 44%; background-image: linear-gradient(90deg, #061c35 0%, rgba(6,28,53,.70) 10%, rgba(6,28,53,.04) 62%), url('assets/hero.jpg'); background-size: cover; background-position: 50% 44%; }
.hero::after { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 30% 30%, rgba(22,112,211,.34), transparent 40%); pointer-events: none; }
.hero-copy { position: relative; z-index: 2; min-height: 622px; display: flex; align-items: center; }
.hero-text { width: 55%; color: #fff; padding-top: 30px; }
.eyebrow, .section-kicker, .mini-label { display: inline-block; letter-spacing: .13em; font-size: 12px; font-weight: 700; color: var(--blue); }
.hero .eyebrow { color: #93c6ff; margin-bottom: 20px; }
.hero h1 { margin: 0; font-size: clamp(48px, 5vw, 70px); line-height: 1.13; letter-spacing: -.035em; }
.hero p { width: min(580px, 92%); margin: 26px 0 34px; font-size: 18px; line-height: 1.85; color: rgba(255,255,255,.80); }
.hero-actions { display: flex; gap: 14px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-width: 150px; padding: 14px 24px; border-radius: 999px; font-size: 15px; font-weight: 700; transition: .2s ease; }
.button.primary { background: var(--blue-2); color: white; box-shadow: 0 12px 28px rgba(15,115,223,.30); }
.button.primary:hover { transform: translateY(-2px); }
.button.ghost { color: white; border: 1px solid rgba(255,255,255,.36); background: rgba(255,255,255,.05); }
.button.white { background: #fff; color: var(--blue); }
.hero-band { position: absolute; z-index: 3; left: 0; right: 0; bottom: 0; border-top: 1px solid rgba(255,255,255,.15); background: rgba(4,25,48,.80); backdrop-filter: blur(12px); }
.band-grid { display: grid; grid-template-columns: repeat(4,1fr); min-height: 88px; }
.band-grid div { padding: 20px 26px; border-right: 1px solid rgba(255,255,255,.12); color: white; }
.band-grid div:last-child { border-right: 0; }
.band-grid strong { display: block; font-size: 16px; margin-bottom: 6px; }
.band-grid span { font-size: 13px; color: rgba(255,255,255,.62); }

.section { padding: 112px 0; }
.section-heading { margin-bottom: 56px; }
.split-heading { display: grid; grid-template-columns: .9fr 1.1fr; gap: 80px; align-items: end; }
.section-heading h2 { margin: 12px 0 0; font-size: 42px; line-height: 1.25; letter-spacing: -.025em; color: var(--navy); }
.section-heading p { margin: 0; font-size: 17px; line-height: 1.9; color: var(--muted); }
.centered { max-width: 760px; margin-left: auto; margin-right: auto; text-align: center; }
.centered p { margin-top: 18px; }

.origin { background: linear-gradient(180deg,#fff 0,#f6f9fc 100%); }
.origin-layout { display: grid; grid-template-columns: 1.05fr .95fr; gap: 42px; }
.origin-story, .pathway { background: #fff; border: 1px solid var(--line); border-radius: 24px; }
.origin-story { padding: 42px; box-shadow: var(--shadow); }
.origin-story h3, .pathway h3, .authorization-copy h3, .tool-stack h3, .process-panel h3 { margin: 0; font-size: 26px; color: var(--navy); }
.lead { font-size: 17px; color: var(--muted); line-height: 1.8; }
.source-list { margin-top: 32px; display: grid; gap: 24px; }
.source-item { display: grid; grid-template-columns: 48px 1fr; gap: 16px; }
.source-item > span { width: 38px; height: 38px; display: grid; place-items: center; color: var(--blue); border: 1px solid #bcd6f0; border-radius: 50%; font-weight: 700; font-size: 13px; }
.source-item h4 { margin: 1px 0 8px; font-size: 18px; }
.source-item p { margin: 0; color: var(--muted); line-height: 1.7; font-size: 14px; }
.pathway { padding: 42px 42px 10px 42px; background: linear-gradient(145deg,#072c55,#0a3d70); color: #fff; box-shadow: 0 24px 50px rgba(8,41,79,.20); }
.pathway .mini-label { color: #87c0ff; }
.pathway h3 { color: #fff; margin-top: 10px; }
.path-line { margin-top: 38px; display: grid; grid-template-columns: 1fr 24px 1fr 24px 1fr 24px 1fr; align-items: center; }
.path-step { min-height: 126px; padding: 20px 14px; border-radius: 14px; background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.13); }
.path-step b { display: block; font-size: 17px; margin-bottom: 10px; }
.path-step span { font-size: 12px; line-height: 1.6; color: rgba(255,255,255,.66); }
.path-line i { height: 1px; background: rgba(255,255,255,.35); position: relative; }
.path-line i::after { content: ""; position: absolute; right: -1px; top: -3px; border-left: 6px solid rgba(255,255,255,.55); border-top: 3px solid transparent; border-bottom: 3px solid transparent; }
.pathway blockquote { margin: 34px 0 0; padding-top: 28px; border-top: 1px solid rgba(255,255,255,.16); color: rgba(255,255,255,.75); font-size: 15px; }

.award-section { padding: 96px 0; background: var(--navy); color: #fff; }
.award-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 100px; align-items: center; }
.section-kicker.light { color: #88c4ff; }
.award-copy h2 { font-size: 44px; line-height: 1.2; margin: 16px 0 18px; }
.award-copy h3 { margin: 0 0 22px; font-size: 22px; color: #dcecff; }
.award-copy p { color: rgba(255,255,255,.67); line-height: 1.9; font-size: 16px; }
.award-certificates { display: flex; align-items: flex-end; justify-content: center; gap: 24px; }
.award-certificates figure { margin: 0; width: 200px; padding: 16px; background: #fff; border-radius: 10px; box-shadow: 0 20px 40px rgba(0,0,0,.22); transform: rotate(-1.2deg); }
.award-certificates figure:nth-child(2) { transform: rotate(1.2deg) translateY(18px); }

.patents { background: #fff; }
.capability-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; }
.capability-grid article { position: relative; padding: 34px; min-height: 220px; border-top: 3px solid var(--blue); background: var(--soft); }
.cap-index { color: var(--blue); font-size: 13px; letter-spacing: .12em; font-weight: 700; }
.capability-grid h3 { margin: 34px 0 12px; font-size: 24px; color: var(--navy); }
.capability-grid p { margin: 0; line-height: 1.8; color: var(--muted); font-size: 15px; }
.authorization-block { margin-top: 56px; display: grid; grid-template-columns: .85fr 1.15fr; gap: 50px; padding: 52px; border: 1px solid var(--line); border-radius: 26px; box-shadow: var(--shadow); }
.authorization-copy p { margin: 18px 0 30px; color: var(--muted); font-size: 16px; line-height: 1.9; }
.authorization-flow { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; font-size: 13px; font-weight: 700; color: var(--navy); }
.authorization-flow i { width: 24px; height: 1px; background: var(--blue); position: relative; }
.authorization-flow i::after { content: ""; position: absolute; right: 0; top: -3px; border-left: 5px solid var(--blue); border-top: 3px solid transparent; border-bottom: 3px solid transparent; }
.document-gallery { display: grid; grid-template-columns: repeat(4,1fr); gap: 14px; align-items: end; }
.doc { appearance: none; padding: 0; border: 0; background: transparent; cursor: zoom-in; text-align: center; }
.doc img { width: 100%; height: 220px; object-fit: contain; background: #f9fbfd; border: 1px solid #edf1f5; border-radius: 8px; transition: transform .2s ease, box-shadow .2s ease; }
.doc:hover img { transform: translateY(-5px); box-shadow: 0 12px 28px rgba(8,41,79,.15); }
.doc span { display: block; margin-top: 10px; color: var(--muted); font-size: 12px; }
.authorization-doc img { object-position: top; }

.team-section { padding: 112px 0; background: linear-gradient(135deg,#06223f,#0a3d70); color: #fff; }
.light-heading h2 { color: #fff; }
.light-heading p { color: rgba(255,255,255,.64); }
.team-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 26px; }
.expert { display: grid; grid-template-columns: 170px 1fr; min-height: 348px; background: #fff; color: var(--text); border-radius: 22px; overflow: hidden; }
.expert-photo { background: linear-gradient(180deg,#edf4fb,#dce8f4); display: flex; align-items: flex-end; justify-content: center; padding: 22px 12px 0; }
.expert-photo img { width: 148px; height: 148px; object-fit: cover; border-radius: 50%; margin-bottom: auto; margin-top: 28px; box-shadow: 0 12px 28px rgba(7,37,69,.15); }
.expert-info { padding: 38px 34px; }
.role { color: var(--blue); font-size: 11px; font-weight: 700; letter-spacing: .11em; }
.expert h3 { margin: 10px 0 8px; font-size: 27px; color: var(--navy); }
.expert h4 { margin: 0 0 16px; font-size: 15px; }
.expert p { margin: 0; color: var(--muted); line-height: 1.8; font-size: 14px; }
.tags { margin-top: 22px; display: flex; gap: 8px; flex-wrap: wrap; }
.tags span { padding: 7px 12px; border-radius: 999px; background: #eaf3fc; color: var(--blue); font-size: 12px; }

.engineering { background: #f5f8fb; }
.engineering-layout { display: grid; grid-template-columns: .72fr 1.28fr; gap: 28px; }
.tool-stack, .process-panel { background: #fff; border: 1px solid var(--line); border-radius: 22px; padding: 34px; }
.tool-stack { box-shadow: var(--shadow); }
.tool-item { margin-top: 18px; padding: 20px 0; border-bottom: 1px solid #e7edf3; }
.tool-item:last-child { border-bottom: 0; }
.tool-item b { display: block; font-size: 16px; color: var(--navy); margin-bottom: 6px; }
.tool-item span { color: var(--muted); font-size: 13px; line-height: 1.6; }
.process-panel { padding: 36px 38px; }
.process-panel h3 { margin-top: 10px; }
.process-track { margin-top: 38px; display: grid; grid-template-columns: repeat(6,1fr); gap: 8px; position: relative; }
.process-track::before { content: ""; position: absolute; left: 7%; right: 7%; top: 29px; height: 1px; background: #a9c7e7; }
.process-node { position: relative; z-index: 1; text-align: center; }
.process-node > span { width: 58px; height: 58px; display: grid; place-items: center; margin: 0 auto 16px; border-radius: 50%; background: #fff; border: 2px solid var(--blue); color: var(--blue); font-weight: 700; box-shadow: 0 0 0 8px #fff; }
.process-node b { display: block; font-size: 14px; color: var(--navy); }
.process-node small { display: block; margin-top: 6px; color: var(--muted); font-size: 11px; line-height: 1.5; }
.process-note { margin-top: 38px; padding: 18px 20px; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; background: #edf5fd; border-radius: 12px; }
.process-note strong { margin-right: 8px; color: var(--navy); }
.process-note span { padding: 6px 10px; background: #fff; color: var(--blue); border-radius: 999px; font-size: 12px; }

.summary-section { padding: 90px 0; background: var(--navy); color: #fff; }
.summary-title { max-width: 900px; }
.summary-title h2 { margin: 12px 0 48px; font-size: 40px; line-height: 1.3; }
.summary-grid { display: grid; grid-template-columns: repeat(4,1fr); border-top: 1px solid rgba(255,255,255,.18); }
.summary-grid div { padding: 28px 28px 6px 0; }
.summary-grid b { display: block; font-size: 18px; margin-bottom: 10px; }
.summary-grid span { color: rgba(255,255,255,.62); line-height: 1.7; font-size: 14px; }

.cta-section { padding: 72px 0; background: var(--blue); color: #fff; }
.cta-wrap { display: flex; align-items: center; justify-content: space-between; gap: 40px; }
.cta-wrap span { font-size: 13px; color: rgba(255,255,255,.72); }
.cta-wrap h2 { margin: 8px 0; font-size: 36px; }
.cta-wrap p { margin: 0; color: rgba(255,255,255,.78); }


.lightbox { position: fixed; inset: 0; z-index: 100; background: rgba(2,15,29,.88); display: none; place-items: center; padding: 40px; }
.lightbox.open { display: grid; }
.lightbox img { max-width: min(900px,90vw); max-height: 88vh; background: #fff; box-shadow: 0 30px 80px rgba(0,0,0,.45); }
.lightbox button { position: absolute; top: 24px; right: 30px; width: 44px; height: 44px; border: 1px solid rgba(255,255,255,.4); border-radius: 50%; background: transparent; color: #fff; font-size: 28px; cursor: pointer; }

@media (max-width: 1080px) {
  .nav { display: none; }
  .nav-cta { margin-left: auto; }
  .hero-text { width: 65%; }
  .origin-layout, .authorization-block, .engineering-layout, .award-layout { grid-template-columns: 1fr; }
  .award-layout { gap: 50px; }
  .team-grid { grid-template-columns: 1fr; }
  .document-gallery { grid-template-columns: repeat(4,1fr); }
  .process-track { grid-template-columns: repeat(3,1fr); gap: 28px 8px; }
  .process-track::before { display: none; }
}

@media (max-width: 760px) {
  .shell { width: min(100% - 30px, 1180px); }
  .hero-image { inset: 48% 0 0 0; background-image: linear-gradient(180deg,#061c35 0%,rgba(6,28,53,.12) 30%),url('assets/hero.jpg'); }
  .hero-copy { min-height: 620px; align-items: flex-start; padding-top: 80px; }
  .hero-text { width: 100%; }
  .hero h1 { font-size: 44px; }
  .hero p { font-size: 16px; }
  .hero { display: none; }
  .section { padding: 76px 0; }
  .split-heading { grid-template-columns: 1fr; gap: 18px; }
  .section-heading h2, .award-copy h2 { font-size: 34px; }
  .origin-story, .pathway, .authorization-block, .tool-stack, .process-panel { padding: 26px; }
  .path-line { grid-template-columns: 1fr; gap: 10px; }
  .path-line i { width: 1px; height: 16px; margin: auto; }
  .capability-grid, .summary-grid { grid-template-columns: 1fr; }
  .document-gallery { grid-template-columns: repeat(2,1fr); }
  .expert { grid-template-columns: 1fr; }
  .expert-photo { min-height: 210px; }
  .process-track { grid-template-columns: repeat(2,1fr); }
  .cta-wrap, .footer-wrap { flex-direction: column; align-items: flex-start; }
  .footer-meta { flex-direction: column; gap: 8px; }
}