:root {
  --blue: #1b5cff;
  --blue-2: #27a8ff;
  --navy: #061431;
  --navy-2: #0a214e;
  --ink: #10213f;
  --muted: #64718a;
  --line: #dce5f3;
  --soft: #f4f7fc;
  --white: #fff;
  --red: #ec234c;
  --gradient: linear-gradient(135deg, #1858ff 0%, #20b4ff 100%);
  --shadow: 0 22px 70px rgba(13, 45, 111, .12);
  --radius: 28px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  color: var(--ink);
  background: #fff;
  line-height: 1.7;
  overflow-x: hidden;
}
body.nav-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input, textarea { font: inherit; }
.container { width: min(1180px, calc(100% - 48px)); margin: 0 auto; }
.section { padding: 118px 0; position: relative; }

.page-progress { position: fixed; left: 0; top: 0; width: 100%; height: 3px; z-index: 9999; pointer-events: none; }
.page-progress span { display: block; width: 0; height: 100%; background: linear-gradient(90deg, #2ea9ff, #fff); }

.site-header {
  position: fixed; z-index: 1000; left: 0; top: 0; width: 100%;
  height: 86px; transition: .35s ease; color: #fff;
}
.site-header.scrolled { height: 72px; background: rgba(255,255,255,.92); color: var(--ink); box-shadow: 0 10px 35px rgba(4, 25, 70, .08); backdrop-filter: blur(18px); }
.header-inner { height: 100%; display: flex; align-items: center; gap: 32px; }
.brand { width: 154px; flex: 0 0 auto; position: relative; }
.brand img { width: 154px; height: auto; }
.brand-dark { display: none; }
.site-header.scrolled .brand-light { display: none; }
.site-header.scrolled .brand-dark { display: block; }
.main-nav { display: flex; align-items: center; gap: 28px; margin-left: auto; }
.main-nav a { font-size: 14px; font-weight: 600; position: relative; opacity: .86; transition: .25s; white-space: nowrap; }
.main-nav a::after { content: ""; position: absolute; left: 50%; bottom: -10px; width: 0; height: 2px; background: currentColor; transform: translateX(-50%); transition: .25s; }
.main-nav a:hover, .main-nav a.active { opacity: 1; }
.main-nav a:hover::after, .main-nav a.active::after { width: 18px; }
.header-cta { display: inline-flex; align-items: center; gap: 10px; border: 1px solid rgba(255,255,255,.35); padding: 10px 16px; border-radius: 999px; font-size: 13px; font-weight: 700; transition: .3s; white-space: nowrap; }
.header-cta:hover { background: #fff; color: var(--blue); }
.site-header.scrolled .header-cta { color: #fff; background: var(--blue); border-color: var(--blue); }
.menu-toggle { display: none; width: 42px; height: 42px; border: 0; background: none; padding: 8px; cursor: pointer; }
.menu-toggle span { display: block; height: 2px; margin: 6px 0; background: currentColor; transition: .25s; }

.hero { min-height: 820px; height: 100vh; position: relative; overflow: hidden; color: #fff; display: flex; flex-direction: column; justify-content: center; background: #071634; }
.hero-bg { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(4,18,54,.96) 0%, rgba(5,25,64,.82) 45%, rgba(6,27,68,.25) 78%), url('../assets/images/hero-building.webp') center/cover no-repeat; transform: scale(1.03); animation: heroZoom 14s ease-in-out infinite alternate; }
@keyframes heroZoom { to { transform: scale(1.09); } }
.hero-grid { position: absolute; inset: 0; opacity: .12; background-image: linear-gradient(rgba(255,255,255,.15) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.15) 1px, transparent 1px); background-size: 70px 70px; mask-image: linear-gradient(to right, #000, transparent 85%); }
.hero-orb { position: absolute; border-radius: 50%; filter: blur(2px); opacity: .35; }
.orb-one { width: 380px; height: 380px; right: -120px; top: 120px; background: radial-gradient(circle, #0ec5ff, transparent 70%); }
.orb-two { width: 300px; height: 300px; left: 34%; bottom: -160px; background: radial-gradient(circle, #1858ff, transparent 70%); }
.hero-content { position: relative; z-index: 2; display: flex; align-items: flex-end; justify-content: space-between; padding-top: 70px; }
.hero-copy { max-width: 760px; }
.eyebrow { color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .18em; text-transform: uppercase; display: flex; align-items: center; gap: 12px; margin-bottom: 20px; }
.eyebrow span { width: 24px; height: 2px; background: currentColor; }
.hero-eyebrow { color: #7dd3ff; }
.hero h1 { font-size: clamp(50px, 6vw, 84px); line-height: 1.12; letter-spacing: -.05em; margin: 0 0 26px; font-weight: 800; }
.hero h1 em { font-style: normal; color: #70d8ff; text-shadow: 0 0 34px rgba(52,180,255,.25); }
.hero-copy > p { max-width: 680px; font-size: 18px; color: rgba(255,255,255,.76); margin: 0; }
.hero-actions { display: flex; gap: 14px; margin-top: 38px; }
.btn { min-height: 52px; display: inline-flex; align-items: center; justify-content: center; gap: 14px; border-radius: 999px; padding: 0 25px; font-size: 14px; font-weight: 700; transition: .3s ease; border: 1px solid transparent; }
.btn-primary { background: var(--gradient); color: #fff; box-shadow: 0 14px 30px rgba(24,88,255,.28); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 18px 36px rgba(24,88,255,.36); }
.btn-ghost { border-color: rgba(255,255,255,.35); color: #fff; background: rgba(255,255,255,.05); backdrop-filter: blur(12px); }
.btn-ghost:hover { background: #fff; color: var(--blue); }
.hero-side-card { width: 168px; padding: 28px 24px; border: 1px solid rgba(255,255,255,.22); background: rgba(255,255,255,.08); backdrop-filter: blur(18px); border-radius: 22px; margin-bottom: 4px; }
.hero-side-label { font-size: 10px; letter-spacing: .2em; opacity: .6; }
.hero-side-card strong { display: block; font-size: 38px; margin: 4px 0; }
.hero-side-line { height: 1px; background: rgba(255,255,255,.25); margin: 14px 0; }
.hero-side-card p { font-size: 12px; color: rgba(255,255,255,.7); margin: 0; line-height: 1.7; }
.hero-metrics { position: absolute; z-index: 2; left: 50%; transform: translateX(-50%); bottom: 54px; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid rgba(255,255,255,.2); padding-top: 24px; }
.metric-item { position: relative; padding: 0 34px; }
.metric-item:first-child { padding-left: 0; }
.metric-item:not(:last-child)::after { content: ""; position: absolute; right: 0; top: 7px; width: 1px; height: 38px; background: rgba(255,255,255,.18); }
.metric-item strong { display: block; font-size: 29px; line-height: 1; letter-spacing: -.02em; }
.metric-item sup { font-size: 13px; margin-left: 3px; color: #67d5ff; }
.metric-item > span { display: block; font-size: 12px; color: rgba(255,255,255,.6); margin-top: 9px; }
.scroll-hint { position: absolute; right: 34px; bottom: 46px; z-index: 3; writing-mode: vertical-rl; font-size: 9px; letter-spacing: .22em; color: rgba(255,255,255,.6); display: flex; align-items: center; gap: 10px; }
.scroll-hint span { width: 1px; height: 42px; background: rgba(255,255,255,.4); position: relative; overflow: hidden; }
.scroll-hint span::after { content: ""; position: absolute; left: 0; top: -20px; width: 1px; height: 18px; background: #fff; animation: scrollLine 1.8s infinite; }
@keyframes scrollLine { to { transform: translateY(70px); } }

.tech-ribbon { overflow: hidden; background: #0b4ed9; color: #fff; height: 58px; display: flex; align-items: center; }
.ribbon-track { display: flex; align-items: center; gap: 28px; width: max-content; animation: marquee 30s linear infinite; white-space: nowrap; }
.ribbon-track span { font-size: 12px; font-weight: 700; letter-spacing: .08em; opacity: .9; }
.ribbon-track i { width: 5px; height: 5px; background: #68d8ff; border-radius: 50%; }
@keyframes marquee { to { transform: translateX(-50%); } }

.section-heading { max-width: 780px; margin-bottom: 58px; }
.section-heading h2, .responsibility-head h2 { font-size: clamp(36px, 4.3vw, 58px); line-height: 1.18; letter-spacing: -.045em; margin: 0 0 22px; }
.section-heading > p, .split-heading > p { color: var(--muted); font-size: 16px; margin: 0; }
.split-heading { max-width: none; display: grid; grid-template-columns: 1.05fr .95fr; gap: 80px; align-items: end; }
.split-heading > p { padding-bottom: 10px; }

.about { background: radial-gradient(circle at 90% 10%, #edf7ff 0%, transparent 30%), #fff; }
.about-feature { display: grid; grid-template-columns: 1.02fr .98fr; gap: 72px; align-items: center; }
.about-image-wrap { position: relative; }
.about-image-wrap::before { content: ""; position: absolute; width: 78%; height: 80%; left: -24px; bottom: -24px; border: 1px solid #c7d7ef; border-radius: var(--radius); z-index: 0; }
.about-image-wrap img { width: 100%; height: 490px; object-fit: cover; border-radius: var(--radius); position: relative; z-index: 1; box-shadow: var(--shadow); }
.experience-badge { position: absolute; z-index: 2; right: -28px; bottom: 28px; width: 152px; height: 152px; border-radius: 50%; background: var(--gradient); color: #fff; display: flex; flex-direction: column; align-items: center; justify-content: center; box-shadow: 0 18px 42px rgba(22,96,255,.3); }
.experience-badge b { font-size: 34px; line-height: 1; }
.experience-badge span { font-size: 11px; text-align: center; margin-top: 9px; line-height: 1.5; }
.mini-title { display: inline-block; color: var(--blue); font-size: 13px; font-weight: 800; padding: 7px 13px; background: #eef4ff; border-radius: 999px; }
.about-content h3 { font-size: 34px; line-height: 1.35; letter-spacing: -.03em; margin: 22px 0 18px; }
.about-content > p { color: var(--muted); margin: 0; }
.credential-list { margin-top: 30px; display: grid; gap: 15px; }
.credential-list > div { display: flex; align-items: center; gap: 16px; padding: 14px 0; border-top: 1px solid var(--line); }
.credential-list > div > span { color: var(--blue); font-size: 11px; font-weight: 800; }
.credential-list p { display: flex; flex-direction: column; margin: 0; }
.credential-list b { font-size: 15px; }
.credential-list small { color: #8a96a9; font-size: 12px; }
.strength-grid { margin-top: 86px; display: grid; grid-template-columns: repeat(6, 1fr); border: 1px solid var(--line); border-radius: 22px; overflow: hidden; background: #fff; box-shadow: 0 18px 55px rgba(23,53,105,.06); }
.strength-grid article { padding: 28px 20px; text-align: center; position: relative; }
.strength-grid article:not(:last-child)::after { content: ""; position: absolute; right: 0; top: 28%; height: 44%; width: 1px; background: var(--line); }
.strength-grid strong { display: block; font-size: 31px; color: var(--blue); line-height: 1.1; }
.strength-grid sup { font-size: 12px; margin-left: 3px; }
.strength-grid span { font-size: 12px; color: var(--muted); }

.business { background: var(--soft); overflow: hidden; }
.business::before { content: ""; position: absolute; left: -130px; top: 40px; width: 380px; height: 380px; border: 90px solid rgba(28,94,255,.035); border-radius: 50%; }
.business-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; }
.business-card { min-height: 470px; border-radius: var(--radius); padding: 34px; position: relative; overflow: hidden; display: flex; flex-direction: column; color: #fff; box-shadow: var(--shadow); isolation: isolate; transition: .35s; }
.business-card:hover { transform: translateY(-8px); }
.business-card::before { content: ""; position: absolute; inset: 0; z-index: -2; background-size: cover; background-position: center; transition: .5s; }
.business-card:hover::before { transform: scale(1.05); }
.business-card::after { content: ""; position: absolute; inset: 0; z-index: -1; }
.business-card.software::before { background-image: url('../assets/images/ai-data-bg.webp'); }
.business-card.software::after { background: linear-gradient(180deg, rgba(8,34,96,.32), rgba(7,20,58,.97)); }
.business-card.industry-card::before { background-image: url('../assets/images/smart-crane-poster.webp'); }
.business-card.industry-card::after { background: linear-gradient(180deg, rgba(12,38,80,.25), rgba(5,25,61,.97)); }
.business-card.bci-card::before { background-image: url('../assets/images/brain-computer.webp'); }
.business-card.bci-card::after { background: linear-gradient(180deg, rgba(38,25,102,.22), rgba(16,16,66,.98)); }
.business-index { position: absolute; right: 25px; top: 17px; font-size: 64px; font-weight: 800; opacity: .12; line-height: 1; }
.business-icon { width: 55px; height: 55px; border-radius: 17px; background: rgba(255,255,255,.13); border: 1px solid rgba(255,255,255,.22); display: grid; place-items: center; margin-bottom: auto; backdrop-filter: blur(12px); }
.business-icon svg { width: 28px; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.business-card > span { font-size: 12px; letter-spacing: .15em; color: #7bdcff; margin-bottom: 8px; }
.business-card h3 { font-size: 27px; margin: 0 0 12px; }
.business-card p { color: rgba(255,255,255,.65); font-size: 14px; margin: 0 0 24px; }
.business-card a { font-size: 13px; font-weight: 700; display: flex; align-items: center; justify-content: space-between; border-top: 1px solid rgba(255,255,255,.18); padding-top: 18px; }
.organization { margin-top: 30px; background: #fff; border-radius: 22px; padding: 26px 30px; display: flex; align-items: center; gap: 34px; box-shadow: 0 15px 50px rgba(31,61,113,.06); }
.org-title { min-width: 210px; display: flex; flex-direction: column; border-right: 1px solid var(--line); }
.org-title span { font-size: 10px; letter-spacing: .25em; color: var(--blue); }
.org-title b { font-size: 17px; }
.org-units { display: flex; flex-wrap: wrap; gap: 10px; }
.org-units span { font-size: 12px; color: #526078; background: #f3f6fb; border: 1px solid #e8eef8; padding: 8px 13px; border-radius: 999px; }

.products { background: #fff; }
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.product-card { min-height: 355px; border: 1px solid var(--line); border-radius: 24px; padding: 28px; position: relative; overflow: hidden; transition: .35s; background: #fff; }
.product-card:hover { transform: translateY(-7px); box-shadow: var(--shadow); border-color: transparent; }
.product-card.featured { grid-column: span 2; color: #fff; background: linear-gradient(135deg,#07307f,#1268f5 60%,#25b5ff); border: 0; }
.product-top { display: flex; justify-content: space-between; align-items: center; font-size: 10px; letter-spacing: .12em; color: #8b97aa; }
.product-top span { font-size: 11px; color: var(--blue); font-weight: 800; }
.featured .product-top { color: rgba(255,255,255,.65); }
.featured .product-top span { color: #7fe1ff; }
.product-card h3 { font-size: 25px; margin: 35px 0 12px; }
.product-card p { font-size: 14px; color: var(--muted); max-width: 470px; }
.featured p { color: rgba(255,255,255,.68); }
.product-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.product-tags span { font-size: 11px; border: 1px solid var(--line); border-radius: 999px; padding: 6px 10px; color: #6d7b91; }
.featured .product-tags span { color: #dff7ff; border-color: rgba(255,255,255,.2); background: rgba(255,255,255,.08); }
.product-icon { position: absolute; right: 24px; bottom: 20px; width: 88px; height: 88px; border-radius: 25px; background: #f3f7fe; display: grid; place-items: center; color: var(--blue); }
.product-icon svg { width: 42px; fill: none; stroke: currentColor; stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; }
.crm-visual { position: absolute; right: 24px; bottom: 26px; width: 260px; height: 165px; border-radius: 18px; background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.18); backdrop-filter: blur(12px); padding: 22px; }
.crm-visual span { display: block; height: 9px; border-radius: 9px; background: rgba(255,255,255,.25); margin-bottom: 15px; }
.crm-visual span:nth-child(2) { width: 65%; }
.crm-visual span:nth-child(3) { width: 80%; }
.crm-visual i { display: block; height: 48px; margin-top: 18px; background: linear-gradient(90deg,rgba(255,255,255,.12) 0 15%, transparent 15% 20%, rgba(255,255,255,.22) 20% 48%, transparent 48% 53%, rgba(255,255,255,.35) 53% 100%); clip-path: polygon(0 75%,15% 55%,32% 65%,48% 25%,65% 45%,82% 12%,100% 30%,100% 100%,0 100%); }
.elder-card { grid-column: span 2; padding: 0; display: grid; grid-template-columns: .88fr 1.12fr; }
.elder-image { min-height: 355px; overflow: hidden; background: #e9f5ff; }
.elder-image img { width: 100%; height: 100%; object-fit: cover; object-position: center 25%; }
.elder-copy { padding: 28px; }
.elder-copy h3 { margin-top: 35px; }

.industrial { background: #061431; color: #fff; overflow: hidden; }
.industrial::before { content: "INDUSTRY"; position: absolute; right: -30px; top: 30px; font-size: 180px; font-weight: 900; color: rgba(255,255,255,.025); letter-spacing: -.08em; }
.industrial-glow { position: absolute; width: 650px; height: 650px; left: -300px; top: 280px; background: radial-gradient(circle, rgba(24,104,255,.28), transparent 68%); }
.light-heading { max-width: 850px; position: relative; }
.light-heading h2 { color: #fff; }
.light-heading p { color: rgba(255,255,255,.58); }
.light-heading .eyebrow { color: #64d4ff; }
.industrial-stage { display: grid; grid-template-columns: 1.22fr .78fr; gap: 24px; position: relative; }
.industrial-video { min-height: 540px; border-radius: 28px; overflow: hidden; position: relative; border: 1px solid rgba(255,255,255,.12); background: #10244a; }
.industrial-video video { width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0; }
.industrial-video::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 45%, rgba(4,17,44,.9)); }
.video-overlay { position: absolute; z-index: 2; left: 30px; bottom: 28px; display: flex; flex-direction: column; }
.video-overlay span { color: #71d8ff; font-size: 10px; letter-spacing: .18em; }
.video-overlay b { font-size: 28px; }
.industrial-features { display: grid; gap: 12px; }
.industrial-features article { border: 1px solid rgba(255,255,255,.11); background: rgba(255,255,255,.045); border-radius: 20px; padding: 23px; display: flex; gap: 18px; align-items: flex-start; transition: .3s; }
.industrial-features article:hover { background: rgba(34,128,255,.12); border-color: rgba(77,182,255,.35); transform: translateX(5px); }
.industrial-features article > span { color: #55ccff; font-size: 11px; font-weight: 800; }
.industrial-features h3 { margin: 0 0 5px; font-size: 18px; }
.industrial-features p { margin: 0; color: rgba(255,255,255,.53); font-size: 12px; line-height: 1.7; }
.industry-tags { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.industry-tags span { border: 1px solid rgba(255,255,255,.13); background: rgba(255,255,255,.04); padding: 9px 16px; border-radius: 999px; color: rgba(255,255,255,.68); font-size: 12px; }

.bci { background: radial-gradient(circle at 100% 10%, #e8ecff, transparent 30%), #fff; }
.bci-flow { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr; align-items: center; gap: 10px; margin-bottom: 70px; }
.bci-flow article { border: 1px solid var(--line); border-radius: 19px; padding: 22px; min-height: 142px; background: rgba(255,255,255,.86); box-shadow: 0 12px 35px rgba(23,55,111,.05); }
.bci-flow article span { color: var(--blue); font-weight: 800; font-size: 11px; }
.bci-flow article b { display: block; margin: 12px 0 4px; }
.bci-flow article p { margin: 0; color: var(--muted); font-size: 12px; }
.bci-flow > i { font-style: normal; color: #a7b5cc; }
.bci-product-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 22px; }
.bci-product { min-height: 440px; border-radius: 28px; padding: 36px; overflow: hidden; position: relative; display: flex; align-items: flex-start; background: #f0f6ff; isolation: isolate; }
.bci-product::before { content: ""; position: absolute; right: -120px; bottom: -160px; width: 380px; height: 380px; border-radius: 50%; background: rgba(27,92,255,.08); z-index: -1; }
.bci-product.helmet { background: #071a45; color: #fff; }
.bci-product-copy { width: 58%; position: relative; z-index: 2; }
.bci-product-copy > span { color: var(--blue); letter-spacing: .16em; font-size: 10px; font-weight: 800; }
.helmet .bci-product-copy > span { color: #58d0ff; }
.bci-product h3 { font-size: 27px; margin: 18px 0 12px; }
.bci-product p { font-size: 13px; color: var(--muted); }
.helmet p { color: rgba(255,255,255,.58); }
.bci-product img { position: absolute; width: 60%; max-height: 330px; object-fit: contain; right: -25px; bottom: 15px; }
.bci-product.helmet img { width: 55%; right: -10px; bottom: 20px; }
.bci-specs { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 22px; }
.bci-specs b { font-size: 10px; border: 1px solid #d6e2f4; padding: 6px 9px; border-radius: 999px; }
.helmet .bci-specs b { border-color: rgba(255,255,255,.16); color: rgba(255,255,255,.7); }
.bci-media-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 22px; margin-top: 22px; }
.media-card { height: 340px; border-radius: 26px; overflow: hidden; position: relative; color: #fff; background: #071a45; }
.media-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 35%, rgba(4,17,49,.9)); }
.media-card img { width: 100%; height: 100%; object-fit: cover; transition: .5s; }
.media-card:hover img { transform: scale(1.045); }
.media-card > div { position: absolute; left: 28px; bottom: 24px; z-index: 2; }
.media-card > div span { font-size: 10px; color: #6cd6ff; letter-spacing: .15em; }
.media-card h3 { margin: 4px 0 0; font-size: 21px; }
.play-button { position: absolute; z-index: 3; right: 27px; bottom: 26px; width: 52px; height: 52px; border-radius: 50%; border: 1px solid rgba(255,255,255,.35); background: rgba(255,255,255,.14); color: #fff; cursor: pointer; backdrop-filter: blur(10px); transition: .3s; }
.play-button:hover { background: #fff; color: var(--blue); transform: scale(1.08); }
.play-button.small { width: 44px; height: 44px; }
.bci-roadmap { margin-top: 65px; background: #071a45; color: #fff; border-radius: 28px; padding: 34px; display: grid; grid-template-columns: 1.25fr repeat(3,1fr); gap: 12px; }
.roadmap-intro { padding: 12px 28px 12px 5px; }
.roadmap-intro > span { color: #5ad1ff; font-size: 10px; letter-spacing: .14em; }
.roadmap-intro h3 { font-size: 25px; margin: 14px 0 8px; }
.roadmap-intro p { color: rgba(255,255,255,.55); font-size: 12px; }
.bci-roadmap article { padding: 24px; background: rgba(255,255,255,.055); border: 1px solid rgba(255,255,255,.1); border-radius: 18px; }
.bci-roadmap article b { color: #68d8ff; font-size: 11px; }
.bci-roadmap h4 { font-size: 22px; margin: 12px 0; }
.bci-roadmap article p { color: rgba(255,255,255,.68); font-size: 13px; min-height: 52px; }
.bci-roadmap article span { font-size: 10px; color: rgba(255,255,255,.42); }

.timeline-section { background: #f4f7fc; overflow: hidden; }
.timeline { display: grid; grid-template-columns: repeat(7, minmax(215px, 1fr)); gap: 18px; overflow-x: auto; padding: 20px 4px 28px; scrollbar-width: thin; }
.timeline article { min-height: 230px; background: #fff; border: 1px solid var(--line); border-radius: 20px; padding: 26px 22px; position: relative; }
.timeline article::before { content: ""; position: absolute; left: 22px; top: -8px; width: 16px; height: 16px; border-radius: 50%; background: var(--blue); border: 5px solid #dbe8ff; }
.timeline b { color: var(--blue); font-size: 13px; }
.timeline h3 { font-size: 18px; margin: 20px 0 10px; line-height: 1.4; }
.timeline p { font-size: 12px; color: var(--muted); margin: 0; }

.ecosystem { background: #fff; }
.partner-panel { display: grid; grid-template-columns: 300px 1fr; align-items: center; border-radius: 28px; overflow: hidden; background: #0d4dd7; color: #fff; min-height: 210px; box-shadow: var(--shadow); }
.partner-number { height: 100%; padding: 42px; background: linear-gradient(135deg,#083284,#1c66f5); display: flex; flex-direction: column; justify-content: center; }
.partner-number strong { font-size: 42px; line-height: 1; }
.partner-number sup { font-size: 16px; color: #6bdcff; }
.partner-number span { font-size: 12px; color: rgba(255,255,255,.65); margin-top: 12px; }
.partner-logos { display: grid; grid-template-columns: repeat(5,1fr); gap: 10px; padding: 30px; }
.partner-logos div { height: 95px; display: grid; place-items: center; padding: 13px; background: rgba(255,255,255,.92); border-radius: 14px; }
.partner-logos img { max-width: 100%; max-height: 68px; object-fit: contain; }
.cooperation-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 22px; margin-top: 24px; }
.cooperation-card { min-height: 350px; position: relative; border-radius: 25px; overflow: hidden; color: #fff; }
.cooperation-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 25%, rgba(5,20,53,.94)); }
.cooperation-card img { width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0; transition: .5s; }
.cooperation-card:hover img { transform: scale(1.04); }
.cooperation-card > div { position: absolute; left: 30px; right: 30px; bottom: 26px; z-index: 2; }
.cooperation-card span { color: #6ed8ff; font-size: 10px; letter-spacing: .15em; }
.cooperation-card h3 { font-size: 22px; margin: 7px 0; }
.cooperation-card p { color: rgba(255,255,255,.6); font-size: 12px; margin: 0; }

.careers { background: linear-gradient(180deg, #f5f9ff 0%, #fff 48%, #eef5ff 100%); overflow: hidden; isolation: isolate; }
.careers::before { content: "JOIN"; position: absolute; right: -22px; top: 78px; z-index: -1; color: rgba(27,92,255,.045); font-size: 180px; line-height: 1; font-weight: 900; }
.careers::after { content: ""; position: absolute; left: -190px; top: 160px; width: 420px; height: 420px; border: 82px solid rgba(27,92,255,.04); border-radius: 50%; z-index: -1; }
.career-strip { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; margin: -18px 0 28px; }
.career-strip > div { min-height: 108px; padding: 24px 26px; border: 1px solid #dce7f8; border-radius: 22px; background: rgba(255,255,255,.82); box-shadow: 0 16px 45px rgba(24,66,130,.06); }
.career-strip b { display: block; color: var(--blue); font-size: 18px; margin-bottom: 6px; }
.career-strip span { color: var(--muted); font-size: 13px; }
.career-layout { display: grid; grid-template-columns: minmax(0, 1fr) 430px; gap: 24px; align-items: start; }
.career-board { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 18px; }
.career-card { min-height: 255px; padding: 30px; border: 1px solid #dce7f8; border-radius: 24px; background: #fff; box-shadow: 0 18px 52px rgba(20,54,111,.07); position: relative; overflow: hidden; transition: transform .35s ease, box-shadow .35s ease, border-color .35s ease; }
.career-card::after { content: ""; position: absolute; right: -64px; bottom: -74px; width: 168px; height: 168px; border-radius: 50%; background: rgba(27,92,255,.06); }
.career-card:hover { transform: translateY(-7px); box-shadow: 0 24px 75px rgba(13,45,111,.14); border-color: transparent; }
.career-card.senior { grid-column: span 2; color: #fff; min-height: 285px; background: linear-gradient(135deg, rgba(5,23,66,.98), rgba(12,79,210,.96) 58%, rgba(39,168,255,.94)), url('../assets/images/ai-data-bg.webp') center/cover; border-color: transparent; }
.career-card.senior::after { width: 260px; height: 260px; right: -86px; bottom: -126px; border: 45px solid rgba(255,255,255,.08); background: transparent; }
.career-card.open { background: linear-gradient(145deg, #fff, #f4f8ff); border-style: dashed; }
.career-index { position: absolute; right: 26px; top: 18px; color: rgba(27,92,255,.12); font-size: 54px; line-height: 1; font-weight: 900; }
.career-card.senior .career-index { color: rgba(255,255,255,.13); font-size: 76px; }
.career-card > span { display: inline-flex; align-items: center; gap: 8px; color: var(--blue); font-size: 11px; font-weight: 800; letter-spacing: .14em; margin-bottom: 22px; text-transform: uppercase; }
.career-card > span::before { content: ""; width: 22px; height: 2px; background: currentColor; }
.career-card.senior > span { color: #75ddff; }
.career-card h3 { max-width: 86%; margin: 0 0 14px; font-size: 26px; line-height: 1.35; color: var(--ink); }
.career-card.senior h3 { color: #fff; font-size: 34px; }
.career-card p { max-width: 680px; margin: 0; color: var(--muted); font-size: 14px; line-height: 1.85; position: relative; z-index: 1; }
.career-card.senior p { color: rgba(255,255,255,.72); }
.career-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 26px; position: relative; z-index: 1; }
.career-tags b { font-size: 11px; color: #5d6b82; border: 1px solid #dce5f3; border-radius: 999px; padding: 7px 11px; background: #f7faff; }
.career-card.senior .career-tags b { color: #e7fbff; border-color: rgba(255,255,255,.2); background: rgba(255,255,255,.09); }
.career-form { position: sticky; top: 96px; padding: 32px; border-radius: 26px; background: linear-gradient(180deg,#071a45,#061431); color: #fff; box-shadow: 0 28px 80px rgba(7,26,69,.24); overflow: hidden; }
.career-form::before { content: ""; position: absolute; right: -120px; top: -120px; width: 260px; height: 260px; border-radius: 50%; background: radial-gradient(circle, rgba(39,168,255,.34), transparent 68%); }
.form-label { display: block; color: #65d5ff; font-size: 10px; font-weight: 800; letter-spacing: .18em; margin-bottom: 12px; position: relative; }
.career-form h3 { margin: 0 0 8px; font-size: 29px; position: relative; }
.form-intro { margin: 0 0 22px; color: rgba(255,255,255,.56); font-size: 13px; line-height: 1.75; position: relative; }
.form-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 14px; position: relative; }
.career-form label { display: flex; flex-direction: column; gap: 7px; margin-bottom: 14px; color: rgba(255,255,255,.76); font-size: 12px; font-weight: 700; position: relative; }
.career-form input, .career-form select, .career-form textarea { width: 100%; min-height: 48px; border: 1px solid rgba(255,255,255,.16); border-radius: 14px; background: rgba(255,255,255,.08); color: #fff; padding: 12px 13px; outline: 0; transition: .25s; box-shadow: inset 0 1px 0 rgba(255,255,255,.05); }
.career-form textarea { resize: vertical; min-height: 118px; }
.career-form input::placeholder, .career-form textarea::placeholder { color: rgba(255,255,255,.38); }
.career-form select option { color: #10213f; }
.career-form input:focus, .career-form select:focus, .career-form textarea:focus { border-color: #5fd3ff; background: rgba(255,255,255,.13); box-shadow: 0 0 0 3px rgba(95,211,255,.1); }
.file-field { padding: 14px; border: 1px dashed rgba(255,255,255,.2); border-radius: 16px; background: rgba(255,255,255,.045); }
.file-field small { color: rgba(255,255,255,.48); font-weight: 400; }
.career-form .btn { width: 100%; border: 0; cursor: pointer; margin-top: 5px; position: relative; }
.career-form .btn[disabled] { opacity: .72; cursor: wait; transform: none; }
.form-status { min-height: 22px; margin: 14px 0 0; color: #7fe1ff; font-size: 12px; position: relative; }
.form-status.error { color: #ff9aaa; }

.responsibility { background: #071a45; color: #fff; }
.responsibility-head { text-align: center; max-width: 720px; margin: 0 auto 52px; }
.responsibility-head .eyebrow { justify-content: center; color: #68d8ff; }
.responsibility-head p { color: rgba(255,255,255,.55); }
.responsibility-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 15px; }
.responsibility-grid article { min-height: 210px; border-radius: 20px; padding: 28px; background: linear-gradient(145deg, rgba(26,92,255,.22), rgba(255,255,255,.04)); border: 1px solid rgba(255,255,255,.1); position: relative; overflow: hidden; }
.responsibility-grid article::after { content: ""; position: absolute; width: 130px; height: 130px; right: -60px; bottom: -70px; border: 24px solid rgba(255,255,255,.05); border-radius: 50%; }
.responsibility-grid span { color: #5fd3ff; font-size: 11px; }
.responsibility-grid h3 { font-size: 20px; margin: 45px 0 6px; }
.responsibility-grid p { color: rgba(255,255,255,.5); font-size: 12px; }

.future-banner { min-height: 530px; position: relative; display: flex; align-items: center; overflow: hidden; background: #eef5ff; }
.future-bg { position: absolute; inset: 0; background: linear-gradient(90deg, #eaf3ff 0%, rgba(234,243,255,.9) 50%, rgba(234,243,255,.2)), url('../assets/images/future-city.webp') center/cover; opacity: .85; }
.future-robot { position: absolute; width: 540px; right: 5%; bottom: -90px; filter: drop-shadow(0 30px 40px rgba(20,60,130,.18)); }
.future-content { position: relative; z-index: 2; }
.future-content > span { color: var(--blue); font-size: 10px; letter-spacing: .2em; font-weight: 800; }
.future-content h2 { font-size: clamp(38px,5vw,64px); margin: 18px 0; letter-spacing: -.05em; }
.future-content p { max-width: 570px; color: var(--muted); margin-bottom: 28px; }

.contact { position: relative; color: #fff; padding: 105px 0; overflow: hidden; background: #061431; }
.contact-bg { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(4,17,48,.96), rgba(5,25,62,.7)), url('../assets/images/contact-building.webp') center/cover; }
.contact-grid { position: relative; display: grid; grid-template-columns: 1fr 480px; gap: 90px; align-items: center; }
.eyebrow.light { color: #67d7ff; }
.contact-copy h2 { font-size: clamp(40px,5vw,65px); line-height: 1.18; margin: 0 0 22px; letter-spacing: -.05em; }
.contact-copy > p { max-width: 640px; color: rgba(255,255,255,.6); }
.contact-actions { display: flex; gap: 12px; margin-top: 32px; flex-wrap: wrap; }
.btn-white { background: #fff; color: var(--blue); }
.btn-white:hover { transform: translateY(-3px); }
.btn-outline-white { border-color: rgba(255,255,255,.25); color: #fff; }
.btn-outline-white:hover { background: rgba(255,255,255,.1); }
.contact-card { border: 1px solid rgba(255,255,255,.16); background: rgba(255,255,255,.08); backdrop-filter: blur(20px); border-radius: 26px; padding: 34px; }
.contact-label { display: block; font-size: 10px; letter-spacing: .18em; color: #67d7ff; margin-bottom: 22px; }
.contact-item { display: flex; gap: 16px; padding: 20px 0; border-top: 1px solid rgba(255,255,255,.13); }
.contact-item i { color: #67d7ff; font-style: normal; font-size: 10px; padding-top: 4px; }
.contact-item div { display: flex; flex-direction: column; }
.contact-item small { color: rgba(255,255,255,.45); font-size: 11px; }
.contact-item b, .contact-item a { font-size: 15px; margin-top: 4px; }
.contact-slogan { margin-top: 16px; color: rgba(255,255,255,.48); font-size: 11px; letter-spacing: .08em; }

.site-footer { background: #030b1d; color: rgba(255,255,255,.5); padding: 27px 0; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.footer-inner img { width: 125px; }
.footer-meta { display: flex; flex-direction: column; gap: 5px; font-size: 11px; text-align: center; }
.footer-meta p { margin: 0; }
.footer-meta a { color: rgba(255,255,255,.62); }
.footer-links { display: flex; gap: 18px; font-size: 11px; }
.footer-inner a:hover { color: #fff; }
.back-top { position: fixed; right: 22px; bottom: 22px; z-index: 80; width: 46px; height: 46px; border: 0; border-radius: 50%; color: #fff; background: var(--blue); box-shadow: 0 12px 28px rgba(24,88,255,.3); cursor: pointer; opacity: 0; visibility: hidden; transform: translateY(15px); transition: .3s; }
.back-top.show { opacity: 1; visibility: visible; transform: translateY(0); }

.video-modal { position: fixed; inset: 0; z-index: 2000; display: grid; place-items: center; opacity: 0; visibility: hidden; transition: .25s; }
.video-modal.open { opacity: 1; visibility: visible; }
.video-modal-backdrop { position: absolute; inset: 0; background: rgba(2,8,22,.82); backdrop-filter: blur(10px); }
.video-modal-panel { width: min(940px, calc(100% - 32px)); background: #07142f; border: 1px solid rgba(255,255,255,.15); border-radius: 22px; padding: 22px; position: relative; color: #fff; box-shadow: 0 40px 100px rgba(0,0,0,.4); transform: translateY(20px) scale(.98); transition: .3s; }
.video-modal.open .video-modal-panel { transform: translateY(0) scale(1); }
.video-modal-panel h3 { margin: 0 45px 16px 4px; font-size: 17px; }
.video-modal-panel video { width: 100%; max-height: 70vh; border-radius: 14px; background: #000; display: block; }
.video-close { position: absolute; right: 16px; top: 13px; width: 38px; height: 38px; border-radius: 50%; border: 1px solid rgba(255,255,255,.16); background: rgba(255,255,255,.06); color: #fff; font-size: 24px; cursor: pointer; }

.reveal { opacity: 0; transform: translateY(32px); transition: opacity .75s ease, transform .75s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 1080px) {
  .main-nav { gap: 18px; }
  .main-nav a { font-size: 12px; }
  .header-cta { display: none; }
  .hero-side-card { display: none; }
  .business-grid { grid-template-columns: repeat(2,1fr); }
  .business-card:last-child { grid-column: span 2; min-height: 390px; }
  .strength-grid { grid-template-columns: repeat(3,1fr); }
  .strength-grid article:nth-child(3)::after { display: none; }
  .product-grid { grid-template-columns: repeat(2,1fr); }
  .product-card.featured, .elder-card { grid-column: span 2; }
  .bci-roadmap { grid-template-columns: repeat(3,1fr); }
  .roadmap-intro { grid-column: span 3; }
  .partner-panel { grid-template-columns: 250px 1fr; }
  .partner-logos { grid-template-columns: repeat(3,1fr); }
  .career-layout { grid-template-columns: 1fr; }
  .career-form { position: relative; top: auto; }
  .contact-grid { grid-template-columns: 1fr 420px; gap: 50px; }
}

@media (max-width: 860px) {
  .container { width: min(100% - 34px, 720px); }
  .section { padding: 86px 0; }
  .site-header { height: 72px; }
  .brand { width: 136px; }
  .brand img { width: 136px; }
  .menu-toggle { display: block; margin-left: auto; color: inherit; }
  .menu-toggle.active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
  .menu-toggle.active span:nth-child(2) { opacity: 0; }
  .menu-toggle.active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
  .main-nav { position: fixed; inset: 72px 0 auto; height: calc(100vh - 72px); padding: 44px 28px; background: rgba(5,18,47,.98); color: #fff; display: flex; flex-direction: column; align-items: flex-start; gap: 0; transform: translateX(100%); transition: .35s; }
  .main-nav.open { transform: none; }
  .main-nav a { width: 100%; font-size: 19px; padding: 15px 0; border-bottom: 1px solid rgba(255,255,255,.1); }
  .main-nav a::after { display: none; }
  .hero { min-height: 760px; height: auto; padding: 140px 0 190px; }
  .hero-bg { background-position: 64% center; }
  .hero h1 { font-size: clamp(45px,11vw,66px); }
  .hero-copy > p { font-size: 15px; }
  .hero-metrics { bottom: 45px; grid-template-columns: repeat(2,1fr); row-gap: 22px; }
  .metric-item { padding: 0 18px; }
  .metric-item:nth-child(2)::after { display: none; }
  .scroll-hint { display: none; }
  .split-heading { grid-template-columns: 1fr; gap: 18px; }
  .about-feature { grid-template-columns: 1fr; gap: 60px; }
  .about-image-wrap img { height: 420px; }
  .experience-badge { right: 12px; bottom: -35px; }
  .business-grid { grid-template-columns: 1fr; }
  .business-card:last-child { grid-column: auto; min-height: 470px; }
  .organization { flex-direction: column; align-items: flex-start; }
  .org-title { width: 100%; border-right: 0; border-bottom: 1px solid var(--line); padding-bottom: 15px; }
  .industrial-stage { grid-template-columns: 1fr; }
  .industrial-video { min-height: 430px; }
  .bci-flow { grid-template-columns: repeat(2,1fr); gap: 12px; }
  .bci-flow > i { display: none; }
  .bci-product-grid, .bci-media-grid, .cooperation-grid { grid-template-columns: 1fr; }
  .partner-panel { grid-template-columns: 1fr; }
  .partner-number { padding: 30px; }
  .career-board { grid-template-columns: 1fr; }
  .responsibility-grid { grid-template-columns: repeat(2,1fr); }
  .future-robot { opacity: .38; right: -150px; }
  .contact-grid { grid-template-columns: 1fr; gap: 45px; }
}

@media (max-width: 560px) {
  .container { width: calc(100% - 28px); }
  .section { padding: 72px 0; }
  .hero { padding-top: 125px; min-height: 790px; }
  .hero h1 { font-size: 43px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn { width: 100%; }
  .hero-metrics { width: calc(100% - 28px); }
  .metric-item strong { font-size: 24px; }
  .section-heading h2, .responsibility-head h2 { font-size: 36px; }
  .about-image-wrap img { height: 310px; }
  .experience-badge { width: 126px; height: 126px; }
  .experience-badge b { font-size: 28px; }
  .about-content h3 { font-size: 27px; }
  .strength-grid { grid-template-columns: repeat(2,1fr); }
  .strength-grid article:nth-child(2n)::after { display: none; }
  .strength-grid article:nth-child(3)::after { display: block; }
  .product-grid { grid-template-columns: 1fr; }
  .product-card.featured, .elder-card { grid-column: auto; }
  .product-card.featured { min-height: 430px; }
  .crm-visual { width: calc(100% - 48px); height: 135px; }
  .elder-card { display: block; }
  .elder-image { min-height: 260px; }
  .industrial-video { min-height: 310px; }
  .bci-flow { grid-template-columns: 1fr; }
  .bci-product { min-height: 500px; padding: 28px; }
  .bci-product-copy { width: 100%; }
  .bci-product img, .bci-product.helmet img { width: 85%; right: -15%; bottom: 5px; opacity: .82; }
  .bci-media-grid .media-card { height: 285px; }
  .bci-roadmap { grid-template-columns: 1fr; padding: 22px; }
  .roadmap-intro { grid-column: auto; padding: 5px; }
  .partner-logos { grid-template-columns: repeat(2,1fr); padding: 20px; }
  .partner-logos div:last-child { grid-column: span 2; }
  .form-grid { grid-template-columns: 1fr; }
  .career-form { padding: 24px; }
  .responsibility-grid { grid-template-columns: 1fr; }
  .future-banner { min-height: 580px; }
  .future-robot { width: 440px; right: -190px; bottom: -30px; }
  .contact { padding: 82px 0; }
  .contact-copy h2 { font-size: 40px; }
  .contact-card { padding: 25px; }
  .footer-inner { flex-direction: column; text-align: center; }
}

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