:root {
  --green: #31a83a;
  --green-dark: #15862d;
  --lime: #bed917;
  --blue: #0879bc;
  --navy: #103a55;
  --ink: #17242d;
  --muted: #60717b;
  --line: #dfe8e2;
  --paper: #f5f8f5;
  --white: #fff;
  --wrap: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: Arial, "Microsoft YaHei", "PingFang SC", sans-serif;
  line-height: 1.75;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.wrap { width: min(calc(100% - 48px), var(--wrap)); margin-inline: auto; }

.site-head {
  position: sticky;
  z-index: 30;
  top: 0;
  background: rgba(255,255,255,.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}
.head-inner { min-height: 76px; display: flex; align-items: center; gap: 28px; }
.expo-brand { display: flex; align-items: center; gap: 12px; margin-right: auto; }
.expo-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  color: var(--white);
  background: var(--green);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: .08em;
}
.expo-copy { line-height: 1.25; }
.expo-copy strong { display: block; font-size: clamp(16px, 1.15vw, 18px); letter-spacing: .04em; }
.expo-copy small { color: var(--muted); font-size: 11px; letter-spacing: .12em; }
.site-nav { display: flex; align-items: center; gap: 28px; font-size: 14px; font-weight: 700; }
.site-nav a { position: relative; padding: 24px 0; }
.site-nav a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 17px;
  left: 0;
  height: 3px;
  background: var(--green);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform .2s ease;
}
.site-nav a:hover::after, .site-nav a:focus-visible::after { transform: scaleX(1); transform-origin: left; }
.menu-btn { display: none; border: 0; padding: 8px 0; background: transparent; color: var(--navy); font-weight: 800; }

.hero { position: relative; min-height: 720px; overflow: hidden; background: var(--white); }
.hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: -10vw;
  width: 54vw;
  height: 100%;
  background: var(--green);
  clip-path: polygon(25% 0,100% 0,100% 100%,0 100%);
}
.hero-grid { position: relative; min-height: 720px; display: grid; grid-template-columns: .92fr 1.08fr; align-items: center; }
.hero-copy { position: relative; z-index: 2; padding: 86px 5vw 90px 0; }
.company-logo { width: 138px; margin-bottom: 38px; }
.eyebrow { display: flex; align-items: center; gap: 12px; color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 42px; height: 5px; background: var(--lime); }
h1 { margin: 20px 0 22px; color: var(--green); font-size: clamp(42px, 5vw, 76px); line-height: 1.08; letter-spacing: -.045em; }
.en-name { margin: 0 0 25px; color: var(--navy); font-size: clamp(18px, 2vw, 28px); line-height: 1.35; letter-spacing: .015em; }
.hero-lead { max-width: 610px; margin: 0; color: var(--muted); font-size: 17px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.btn { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; padding: 0 24px; border: 2px solid transparent; font-weight: 800; transition: .2s ease; }
.btn-primary { color: var(--white); background: var(--blue); }
.btn-secondary { color: var(--navy); border-color: var(--navy); background: var(--white); }
.btn:hover, .btn:focus-visible { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(16,58,85,.15); }
.hero-visual { position: relative; z-index: 1; align-self: stretch; display: flex; align-items: center; padding: 70px 0 70px 35px; }
.hero-visual img { width: 100%; height: min(62vw, 585px); object-fit: cover; box-shadow: 0 30px 70px rgba(9,45,68,.22); }
.hero-note { position: absolute; right: 0; bottom: 38px; padding: 15px 22px; color: var(--white); background: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .12em; }

.stats { position: relative; z-index: 3; margin-top: -1px; background: var(--navy); color: var(--white); }
.stats-grid { display: grid; grid-template-columns: repeat(4,1fr); }
.stat { min-height: 154px; padding: 32px; border-left: 1px solid rgba(255,255,255,.16); }
.stat:last-child { border-right: 1px solid rgba(255,255,255,.16); }
.stat strong { display: block; color: var(--lime); font-size: clamp(30px,4vw,48px); line-height: 1.1; }
.stat span { display: block; margin-top: 8px; color: rgba(255,255,255,.72); font-size: 13px; letter-spacing: .08em; }

.section { padding: 110px 0; }
.section-soft { background: var(--paper); }
.section-head { max-width: 760px; margin-bottom: 48px; }
.section-kicker { color: var(--green); font-size: 12px; font-weight: 800; letter-spacing: .18em; text-transform: uppercase; }
.section h2 { margin: 10px 0 16px; color: var(--navy); font-size: clamp(34px,4vw,54px); line-height: 1.12; letter-spacing: -.035em; }
.section-head p { margin: 0; color: var(--muted); font-size: 17px; }

.profile-grid { display: grid; grid-template-columns: 1fr 1.05fr; gap: 72px; align-items: center; }
.profile-photo { position: relative; }
.profile-photo img { width: 100%; min-height: 560px; object-fit: cover; }
.profile-photo::after { content: ""; position: absolute; right: -18px; bottom: -18px; width: 46%; height: 16px; background: var(--green); }
.profile-copy p { margin: 0 0 18px; color: var(--muted); }
.profile-quote { margin-top: 34px; padding: 28px 32px; border-left: 8px solid var(--lime); color: var(--navy); background: var(--paper); font-size: 19px; font-weight: 800; }

.workshop-grid { display: grid; grid-template-columns: 1.2fr .8fr .8fr; gap: 14px; }
.workshop-card { position: relative; min-height: 470px; overflow: hidden; background: var(--navy); }
.workshop-card img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s ease; }
.workshop-card:hover img { transform: scale(1.035); }
.workshop-card::after { content: ""; position: absolute; inset: auto 0 0; height: 42%; background: rgba(10,47,70,.82); }
.workshop-label { position: absolute; z-index: 2; right: 24px; bottom: 24px; left: 24px; color: var(--white); }
.workshop-label b { display: block; font-size: 22px; line-height: 1.25; }
.workshop-label span { color: rgba(255,255,255,.7); font-size: 12px; letter-spacing: .12em; }

.capability-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; counter-reset: item; }
.capability { position: relative; min-height: 340px; padding: 34px 28px; overflow: hidden; border-top: 8px solid var(--green); background: var(--white); counter-increment: item; }
.capability::after { content: "0" counter(item); position: absolute; right: -3px; bottom: -26px; color: #eef4ef; font-size: 116px; font-weight: 900; line-height: 1; }
.capability h3 { position: relative; z-index: 1; margin: 36px 0 16px; color: var(--navy); font-size: 23px; line-height: 1.3; }
.capability p { position: relative; z-index: 1; margin: 0; color: var(--muted); font-size: 14px; }
.capability-tag { position: relative; z-index: 1; color: var(--blue); font-size: 11px; font-weight: 800; letter-spacing: .12em; }

.products { overflow: hidden; }
.product-grid { display: grid; grid-template-columns: repeat(12,1fr); gap: 16px; }
.product-card { position: relative; min-height: 420px; overflow: hidden; background: #edf1ef; }
.product-card:nth-child(1), .product-card:nth-child(2) { grid-column: span 6; }
.product-card:nth-child(n+3) { grid-column: span 4; }
.product-card img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s ease; }
.product-card:hover img { transform: scale(1.035); }
.product-caption { position: absolute; right: 0; bottom: 0; left: 0; padding: 18px 22px; color: var(--white); background: rgba(16,58,85,.9); }
.product-caption strong { display: block; font-size: 17px; }
.product-caption span { color: rgba(255,255,255,.7); font-size: 12px; letter-spacing: .06em; }

.promise { padding: 105px 0; color: var(--white); background: var(--green); }
.promise-inner { display: grid; grid-template-columns: .55fr 1.45fr; gap: 72px; align-items: start; }
.promise-index { color: var(--lime); font-size: clamp(80px,12vw,170px); font-weight: 900; line-height: .8; }
.promise h2 { margin: 0 0 22px; color: var(--white); font-size: clamp(34px,4vw,58px); line-height: 1.12; }
.promise p { margin: 0; max-width: 790px; color: rgba(255,255,255,.82); font-size: 18px; }

.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; }
.contact-copy { padding-right: 8%; }
.contact-list { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 38px; }
.contact-item { padding-top: 15px; border-top: 1px solid var(--line); }
.contact-item span { display: block; color: var(--muted); font-size: 12px; }
.contact-item strong { color: var(--navy); font-size: 15px; }
.address-panel { padding: 42px; color: var(--white); background: var(--navy); }
.address-panel h3 { margin: 0 0 26px; color: var(--lime); font-size: 25px; }
.address-row { padding: 20px 0; border-top: 1px solid rgba(255,255,255,.15); }
.address-row b { display: block; margin-bottom: 6px; font-size: 13px; }
.address-row p { margin: 0; color: rgba(255,255,255,.7); font-size: 14px; }

footer { padding: 40px 0; color: rgba(255,255,255,.72); background: #092b40; font-size: 13px; }
.footer-grid { display: grid; grid-template-columns: 1.3fr .7fr; gap: 40px; align-items: end; }
footer strong { display: block; margin-bottom: 8px; color: var(--white); }
footer a { color: var(--lime); }
.footer-right { text-align: right; }
.backtop { position: fixed; z-index: 25; right: 20px; bottom: 20px; display: none; border: 0; padding: 12px 16px; color: var(--white); background: var(--blue); font-weight: 800; box-shadow: 0 8px 24px rgba(0,0,0,.18); cursor: pointer; }
.backtop.show { display: block; }

@media (max-width: 980px) {
  .menu-btn { display: block; }
  .site-nav { position: absolute; top: 76px; right: 0; left: 0; display: none; padding: 18px 24px 24px; background: var(--white); border-bottom: 1px solid var(--line); box-shadow: 0 18px 28px rgba(15,58,85,.1); }
  .site-nav.open { display: grid; gap: 0; }
  .site-nav a { padding: 12px 0; }
  .site-nav a::after { display: none; }
  .hero, .hero-grid { min-height: auto; }
  .hero::before { top: auto; right: 0; bottom: 0; width: 100%; height: 44%; clip-path: none; }
  .hero-grid { grid-template-columns: 1fr; padding-top: 20px; }
  .hero-copy { padding: 54px 0 40px; }
  .hero-visual { min-height: 520px; padding: 24px 0 70px; }
  .hero-visual img { height: 500px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .profile-grid { grid-template-columns: 1fr; gap: 52px; }
  .profile-photo img { min-height: 460px; }
  .workshop-grid { grid-template-columns: 1fr 1fr; }
  .workshop-card:first-child { grid-column: 1 / -1; }
  .capability-grid { grid-template-columns: 1fr 1fr; }
  .promise-inner { grid-template-columns: 1fr; gap: 28px; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 650px) {
  .wrap { width: min(calc(100% - 32px), var(--wrap)); }
  .expo-copy strong { font-size: 15px; }
  .expo-copy small { display: none; }
  .section { padding: 76px 0; }
  .hero-copy { padding-top: 44px; }
  .company-logo { width: 112px; margin-bottom: 28px; }
  h1 { font-size: 41px; }
  .hero-lead { font-size: 15px; }
  .hero-actions { display: grid; }
  .hero-visual { min-height: 390px; padding-left: 0; }
  .hero-visual img { height: 355px; }
  .hero-note { right: 0; bottom: 42px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat { min-height: 126px; padding: 24px 18px; }
  .stat strong { font-size: 31px; }
  .profile-photo img { min-height: 340px; }
  .workshop-grid, .capability-grid { grid-template-columns: 1fr; }
  .workshop-card, .workshop-card:first-child { min-height: 390px; grid-column: auto; }
  .capability { min-height: 285px; }
  .product-grid { display: grid; grid-template-columns: 1fr; }
  .product-card, .product-card:nth-child(1), .product-card:nth-child(2), .product-card:nth-child(n+3) { grid-column: auto; min-height: 390px; }
  .contact-list { grid-template-columns: 1fr; }
  .address-panel { padding: 30px 24px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-right { text-align: left; }
  .backtop.show { display: none; }
}

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