:root {
  --blue: #1767c9;
  --blue-dark: #0f4f9d;
  --ink: #152033;
  --muted: #667085;
  --line: #dfe5ec;
  --soft: #f4f7fa;
  --green: #14866d;
  --amber: #c27712;
  --white: #fff;
  --shadow: 0 14px 40px rgba(18, 40, 72, .1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 78px; }
body { margin: 0; color: var(--ink); background: #fff; font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif; line-height: 1.6; }
body.menu-open, body.dialog-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
img { display: block; max-width: 100%; }
.container { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }
.site-header { position: sticky; z-index: 50; top: 0; height: 76px; background: rgba(255,255,255,.96); border-bottom: 1px solid rgba(223,229,236,.85); backdrop-filter: blur(12px); }
.header-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; }
.brand-mark { width: 38px; height: 38px; display: grid; place-items: center; color: #fff; background: var(--blue); border-radius: 6px; font-size: 22px; font-weight: 900; }
.brand strong, .brand small { display: block; line-height: 1.2; letter-spacing: 0; }
.brand strong { font-size: 18px; }
.brand small { margin-top: 3px; color: var(--muted); font-size: 10px; }
.main-nav { display: flex; align-items: center; gap: 28px; margin-left: auto; }
.main-nav a { position: relative; padding: 26px 0 24px; color: #344054; font-size: 14px; font-weight: 600; }
.main-nav a::after { position: absolute; right: 0; bottom: 17px; left: 0; height: 2px; background: var(--blue); content: ""; transform: scaleX(0); transition: transform .2s ease; }
.main-nav a:hover, .main-nav a.active { color: var(--blue); }
.main-nav a:hover::after, .main-nav a.active::after { transform: scaleX(1); }
.header-actions { display: flex; align-items: center; gap: 14px; }
.phone-link { display: inline-flex; align-items: center; gap: 7px; color: var(--blue); font-size: 14px; font-weight: 700; }
.phone-link svg { width: 17px; }
.icon-btn { width: 40px; height: 40px; display: inline-grid; place-items: center; padding: 0; color: var(--ink); background: transparent; border: 0; cursor: pointer; }
.menu-btn { display: none; }
.hero { min-height: calc(100svh - 120px); display: flex; flex-direction: column; justify-content: space-between; position: relative; color: #fff; background: linear-gradient(90deg, rgba(7,25,48,.92) 0%, rgba(11,50,90,.76) 52%, rgba(11,50,90,.2) 100%), url("assets/hero-industry.jpg") center 46%/cover no-repeat; }
.hero::after { position: absolute; inset: 0; background: linear-gradient(180deg, transparent 64%, rgba(5,19,36,.76)); content: ""; pointer-events: none; }
.hero-content { position: relative; z-index: 1; padding-top: clamp(100px, 15vh, 150px); }
.eyebrow { display: inline-flex; padding: 7px 12px; border: 1px solid rgba(255,255,255,.4); border-radius: 4px; background: rgba(5,25,50,.3); font-size: 14px; font-weight: 700; }
.hero h1 { max-width: 920px; margin: 24px 0 18px; font-size: clamp(42px, 5vw, 68px); line-height: 1.12; letter-spacing: 0; }
.hero-content > p { max-width: 650px; margin: 0; color: rgba(255,255,255,.86); font-size: 19px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.btn { min-height: 46px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 0 19px; border: 1px solid transparent; border-radius: 5px; font-size: 14px; font-weight: 700; transition: transform .2s, background .2s, border-color .2s; }
.btn:hover { transform: translateY(-2px); }
.btn svg { width: 18px; }
.btn-primary { color: #fff; background: var(--blue); }
.btn-primary:hover { background: var(--blue-dark); }
.btn-ghost { color: #fff; background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.5); }
.btn-dark { color: #fff; background: var(--ink); }
.btn-outline { color: var(--blue); background: #fff; border-color: #b8c9dc; }
.hero-stats { position: relative; z-index: 1; display: grid; grid-template-columns: repeat(4, 1fr); padding: 26px 0 30px; border-top: 1px solid rgba(255,255,255,.22); }
.hero-stats div { padding: 0 28px; border-left: 1px solid rgba(255,255,255,.22); }
.hero-stats div:first-child { padding-left: 0; border-left: 0; }
.hero-stats strong, .hero-stats span { display: block; }
.hero-stats strong { font-size: 24px; }
.hero-stats span { color: rgba(255,255,255,.67); font-size: 12px; }
.trust-strip { border-bottom: 1px solid var(--line); background: #fff; }
.trust-list { min-height: 82px; display: flex; align-items: center; justify-content: space-between; gap: 28px; overflow: hidden; }
.trust-list span { display: inline-flex; align-items: center; gap: 9px; color: #475467; white-space: nowrap; font-size: 13px; font-weight: 600; }
.trust-list svg { width: 20px; color: var(--blue); }
.section { padding: 96px 0; }
.section-soft { background: var(--soft); }
.section-heading { display: grid; grid-template-columns: 1.15fr .85fr; align-items: end; gap: 70px; margin-bottom: 42px; }
.section-kicker { display: block; margin-bottom: 10px; color: var(--blue); font-size: 13px; font-weight: 800; }
.section h2, .contact-section h2, .solution-dialog h2 { margin: 0; font-size: clamp(29px, 4vw, 42px); line-height: 1.24; letter-spacing: 0; }
.section-heading p { margin: 0; color: var(--muted); font-size: 15px; }
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.product-card { min-height: 410px; display: flex; flex-direction: column; padding: 28px; background: #fff; border: 1px solid var(--line); border-radius: 7px; }
.product-card.featured { border-top: 4px solid var(--blue); padding-top: 25px; box-shadow: var(--shadow); }
.product-icon { width: 44px; height: 44px; display: grid; place-items: center; margin-bottom: 24px; color: #fff; background: var(--blue); border-radius: 6px; }
.product-icon.green { background: var(--green); }
.product-icon.amber { background: var(--amber); }
.product-icon svg { width: 22px; }
.product-title span { color: var(--muted); font-size: 12px; }
.product-title h3 { margin: 2px 0 12px; font-size: 22px; }
.product-card > p { margin: 0; color: var(--muted); font-size: 14px; }
.product-card ul { display: grid; gap: 8px; margin: 20px 0; padding: 0; list-style: none; font-size: 13px; }
.product-card li::before { margin-right: 8px; color: var(--green); content: "✓"; font-weight: 800; }
.text-link { display: inline-flex; align-items: center; gap: 7px; margin-top: auto; color: var(--blue); font-size: 14px; font-weight: 700; }
.text-link svg { width: 16px; transition: transform .2s; }
.text-link:hover svg { transform: translateX(4px); }
.service-row { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 20px; border: 1px solid var(--line); border-radius: 7px; }
.service-row > div { display: flex; align-items: center; gap: 14px; padding: 20px 24px; border-left: 1px solid var(--line); }
.service-row > div:first-child { border-left: 0; }
.service-row svg { color: var(--blue); }
.service-row strong, .service-row small { display: block; }
.service-row strong { font-size: 14px; }
.service-row small { margin-top: 2px; color: var(--muted); font-size: 12px; }
.solution-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.solution-card { min-height: 220px; display: flex; flex-direction: column; align-items: flex-start; padding: 24px; text-align: left; color: var(--ink); background: #fff; border: 1px solid var(--line); border-radius: 7px; cursor: pointer; transition: transform .25s, box-shadow .25s, border-color .25s; }
.solution-card:hover { transform: translateY(-4px); border-color: #91b7e5; box-shadow: var(--shadow); }
.solution-card > svg { width: 24px; height: 24px; margin-bottom: 28px; color: var(--blue); }
.solution-card h3 { margin: 0 0 7px; font-size: 18px; }
.solution-card p { margin: 0 0 18px; color: var(--muted); font-size: 13px; }
.solution-card span { margin-top: auto; color: var(--blue); font-size: 11px; font-weight: 700; }
.about-grid { display: grid; grid-template-columns: .95fr 1.05fr; align-items: center; gap: 78px; }
.about-image { position: relative; aspect-ratio: 4/3; overflow: hidden; border-radius: 7px; }
.about-image::after { position: absolute; right: -1px; bottom: -1px; width: 34%; height: 34%; background: var(--blue); opacity: .8; content: ""; mix-blend-mode: multiply; }
.about-image img { width: 100%; height: 100%; object-fit: cover; }
.about-copy > p { margin: 16px 0 0; color: var(--muted); font-size: 14px; }
.about-facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 26px; padding-top: 24px; border-top: 1px solid var(--line); }
.about-facts strong, .about-facts span { display: block; }
.about-facts strong { font-size: 16px; }
.about-facts span { margin-top: 2px; color: var(--muted); font-size: 11px; }
.team-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 54px; }
.team-panel { display: grid; grid-template-columns: 48px 1fr; align-items: start; gap: 0 17px; padding: 28px; background: var(--soft); border: 1px solid var(--line); border-radius: 7px; }
.team-icon { grid-row: 1 / 3; width: 48px; height: 48px; display: grid; place-items: center; color: #fff; background: var(--blue); border-radius: 6px; }
.team-icon.green { background: var(--green); }
.team-icon svg { width: 23px; }
.team-panel .section-kicker { margin: 0 0 3px; }
.team-panel h3 { margin: 0; font-size: 19px; line-height: 1.4; }
.team-panel > p { grid-column: 1 / -1; margin: 22px 0 0; color: var(--muted); font-size: 13px; }
.vision-band { display: grid; grid-template-columns: .8fr 1.2fr; align-items: center; gap: 50px; margin-top: 18px; padding: 30px 32px; color: #fff; background: var(--ink); border-radius: 7px; }
.vision-heading { display: flex; align-items: center; gap: 16px; }
.vision-heading > svg { flex: 0 0 auto; width: 32px; height: 32px; color: #69aaf8; }
.vision-heading small, .vision-heading h3 { display: block; }
.vision-heading small { color: #8eafd3; font-size: 12px; font-weight: 800; }
.vision-heading h3 { margin: 3px 0 0; font-size: 20px; }
.vision-band p { margin: 0; color: #b7c4d2; font-size: 13px; }
.project-list { margin-top: 18px; border: 1px solid var(--line); border-radius: 7px; }
.project-list summary { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 22px 26px; cursor: pointer; list-style: none; }
.project-list summary::-webkit-details-marker { display: none; }
.project-list summary small, .project-list summary strong { display: block; }
.project-list summary small { color: var(--blue); font-size: 11px; font-weight: 800; }
.project-list summary strong { margin-top: 2px; font-size: 16px; }
.project-list summary > svg { width: 20px; color: var(--blue); transition: transform .2s; }
.project-list[open] summary > svg { transform: rotate(180deg); }
.project-tags { display: flex; flex-wrap: wrap; gap: 8px; padding: 0 26px 26px; }
.project-tags span { padding: 7px 10px; color: #3f5875; background: #f1f6fb; border: 1px solid #dbe7f3; border-radius: 4px; font-size: 12px; }
.case-section { color: #fff; background: #142337; }
.section-heading.light p { color: #9fb0c5; }
.case-section .section-kicker { color: #69aaf8; }
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.case-grid article { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 20px; padding: 28px; background: #1b2e46; border: 1px solid #2e435b; border-radius: 7px; }
.case-grid article > span, .case-grid article h3, .case-grid article p { grid-column: 1 / -1; }
.case-grid article > span { color: #72b2ff; font-size: 12px; font-weight: 800; }
.case-grid h3 { margin: 0; font-size: 19px; }
.case-grid p { margin: 0 0 10px; color: #a7b7ca; font-size: 13px; }
.case-grid strong, .case-grid small { display: block; }
.case-grid strong { color: #fff; font-size: 24px; }
.case-grid small { color: #8ea2b9; font-size: 11px; }
.contact-section { padding: 90px 0; background: #eef5fc; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 70px; }
.contact-copy > p { max-width: 560px; margin: 20px 0 28px; color: var(--muted); }
.contact-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.contact-details { display: grid; grid-template-columns: 1fr 1fr; margin: 0; padding: 12px; font-style: normal; background: #fff; border: 1px solid #d7e4f1; border-radius: 7px; box-shadow: var(--shadow); }
.contact-details > * { min-width: 0; display: flex; align-items: center; gap: 12px; padding: 19px; border-bottom: 1px solid var(--line); }
.contact-details > *:nth-last-child(-n+2) { border-bottom: 0; }
.contact-details svg { flex: 0 0 auto; width: 21px; color: var(--blue); }
.contact-details small, .contact-details strong { display: block; min-width: 0; }
.contact-details small { color: var(--muted); font-size: 11px; }
.contact-details strong { overflow-wrap: anywhere; font-size: 12px; }
.site-footer { padding: 30px 0; color: #a5b3c3; background: #0d1828; }
.footer-inner { display: grid; grid-template-columns: 1fr auto auto; align-items: center; gap: 28px; }
.footer-brand strong { color: #fff; }
.footer-brand small { color: #8797aa; }
.site-footer p { margin: 0; font-size: 12px; }
.floating-call { position: fixed; z-index: 40; right: 22px; bottom: 22px; display: flex; align-items: center; gap: 8px; padding: 12px 15px; color: #fff; background: var(--green); border-radius: 6px; box-shadow: 0 12px 30px rgba(20,134,109,.3); font-size: 13px; font-weight: 800; }
.floating-call svg { width: 18px; }
.solution-dialog { width: min(540px, calc(100% - 30px)); padding: 34px; border: 0; border-radius: 7px; box-shadow: 0 30px 90px rgba(6,23,44,.35); }
.solution-dialog::backdrop { background: rgba(6,18,32,.7); backdrop-filter: blur(4px); }
.dialog-close { position: absolute; top: 12px; right: 12px; }
.dialog-icon { width: 48px; height: 48px; display: grid; place-items: center; margin-bottom: 20px; color: #fff; background: var(--blue); border-radius: 6px; }
.solution-dialog > p { color: var(--muted); }
.dialog-tags { display: flex; flex-wrap: wrap; gap: 7px; margin: 22px 0 26px; }
.dialog-tags span { padding: 5px 9px; color: var(--blue); background: #edf5ff; border-radius: 4px; font-size: 12px; font-weight: 700; }

@media (max-width: 980px) {
  .main-nav { gap: 17px; }
  .phone-link { display: none; }
  .section-heading { gap: 30px; }
  .about-grid, .contact-grid { gap: 40px; }
  .vision-band { grid-template-columns: 1fr; gap: 18px; }
  .contact-details { grid-template-columns: 1fr; }
  .contact-details > * { border-bottom: 1px solid var(--line) !important; }
  .contact-details > *:last-child { border-bottom: 0 !important; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-inner p:last-child { grid-column: 1 / -1; }
}

@media (max-width: 760px) {
  .container { width: min(100% - 28px, 600px); }
  .site-header { height: 68px; }
  .menu-btn { display: inline-grid; }
  .main-nav { position: fixed; inset: 68px 0 auto; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 10px 20px 22px; background: #fff; border-bottom: 1px solid var(--line); box-shadow: var(--shadow); }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 13px 5px; }
  .main-nav a::after { display: none; }
  .hero { min-height: calc(100svh - 100px); background-position: 64% center; }
  .hero-content { padding-top: 80px; }
  .hero h1 { font-size: clamp(38px, 12vw, 54px); }
  .hero-content > p { font-size: 16px; }
  .hero-stats { grid-template-columns: 1fr 1fr; row-gap: 18px; }
  .hero-stats div { padding: 0 12px; }
  .hero-stats div:nth-child(3) { padding-left: 0; border-left: 0; }
  .trust-list { justify-content: flex-start; overflow-x: auto; }
  .section { padding: 70px 0; }
  .section-heading { grid-template-columns: 1fr; gap: 14px; margin-bottom: 30px; }
  .product-grid, .solution-grid, .case-grid { grid-template-columns: 1fr; }
  .product-card { min-height: auto; }
  .service-row { grid-template-columns: 1fr; }
  .service-row > div { border-top: 1px solid var(--line); border-left: 0; }
  .service-row > div:first-child { border-top: 0; }
  .solution-card { min-height: 194px; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .about-grid { gap: 34px; }
  .about-image { aspect-ratio: 16/11; }
  .about-facts { grid-template-columns: 1fr 1fr; }
  .team-grid { grid-template-columns: 1fr; margin-top: 36px; }
  .team-panel { grid-template-columns: 42px 1fr; padding: 22px; }
  .team-icon { width: 42px; height: 42px; }
  .vision-band { padding: 24px 22px; }
  .project-list summary { padding: 19px 20px; }
  .project-tags { padding: 0 20px 20px; }
  .case-grid article { grid-template-columns: 1fr 1fr; }
  .contact-section { padding: 70px 0; }
  .contact-actions .btn { width: 100%; }
  .footer-inner { grid-template-columns: 1fr; gap: 14px; }
  .footer-inner p:last-child { grid-column: auto; }
  .floating-call { right: 14px; bottom: 14px; width: 48px; height: 48px; justify-content: center; padding: 0; border-radius: 50%; }
  .floating-call span { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}