:root {
  --ink: #13231f;
  --muted: #60716c;
  --paper: #f7faf8;
  --white: #ffffff;
  --blue: #2f70ec;
  --blue-dark: #164ca8;
  --green: #79bd45;
  --green-deep: #0c5b47;
  --forest: #06382f;
  --line: #dce7e2;
  --shadow: 0 18px 55px rgb(11 53 44 / 10%);
  --radius: 24px;
  --max: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 96px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
p { line-height: 1.78; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { letter-spacing: -0.035em; }

.container { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.section { padding: 112px 0; }
.sr-only, .skip-link:not(:focus) {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
.skip-link:focus { position: fixed; z-index: 1000; top: 12px; left: 12px; padding: 10px 14px; background: #fff; }

.eyebrow {
  margin-bottom: 18px; color: var(--green-deep); font-size: 13px; font-weight: 750;
  letter-spacing: .16em; text-transform: uppercase;
}
.eyebrow::before { content: ""; display: inline-block; width: 28px; height: 2px; margin: 0 10px 4px 0; background: var(--green); }
.eyebrow.light { color: #b9efce; }
.section-heading { margin-bottom: 52px; }
.section-heading h2, .section-intro h2, .technology-copy h2, .cooperation-grid h2, .contact-card h2 {
  margin-bottom: 0; font-size: clamp(34px, 5vw, 58px); line-height: 1.12;
}
.section-heading.center { max-width: 720px; margin-inline: auto; text-align: center; }
.section-heading.center p:last-child { color: var(--muted); }
.section-heading.split { display: grid; grid-template-columns: 1.4fr .8fr; align-items: end; gap: 40px; }
.section-heading.split > p { margin-bottom: 4px; color: var(--muted); }

.site-header {
  position: fixed; z-index: 100; inset: 0 0 auto; height: 82px; transition: background .25s, box-shadow .25s;
}
.site-header.scrolled { background: rgb(255 255 255 / 94%); box-shadow: 0 8px 30px rgb(3 31 25 / 8%); backdrop-filter: blur(18px); }
.nav-shell { width: min(calc(100% - 40px), 1280px); height: 100%; margin: auto; display: flex; align-items: center; justify-content: space-between; }
.brand { width: 128px; height: 62px; display: flex; align-items: center; }
.brand img { width: 118px; height: auto; }
.site-nav { display: flex; align-items: center; gap: clamp(15px, 1.7vw, 26px); color: white; font-size: 13px; font-weight: 650; }
.site-header.scrolled .site-nav { color: var(--ink); }
.site-nav a { position: relative; padding: 10px 0; }
.site-nav a:not(.nav-cta)::after { content: ""; position: absolute; inset: auto 0 5px; height: 2px; background: var(--green); transform: scaleX(0); transform-origin: right; transition: transform .2s; }
.site-nav a:hover::after, .site-nav a:focus-visible::after { transform: scaleX(1); transform-origin: left; }
.nav-cta { padding: 10px 18px !important; color: white; background: var(--green-deep); border-radius: 999px; }
.menu-toggle { display: none; width: 42px; height: 42px; border: 0; background: transparent; cursor: pointer; }
.menu-toggle span:not(.sr-only) { display: block; width: 24px; height: 2px; margin: 5px auto; background: currentColor; }

.hero { position: relative; min-height: 780px; height: 100svh; display: flex; align-items: center; color: white; overflow: hidden; background: var(--forest); }
.hero-media, .hero-overlay, .hero-grid { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-media { object-fit: cover; }
.hero-overlay { background: linear-gradient(90deg, rgb(3 36 31 / 92%) 0%, rgb(3 36 31 / 74%) 42%, rgb(3 36 31 / 12%) 76%), linear-gradient(0deg, rgb(2 25 21 / 72%) 0%, transparent 38%); }
.hero-grid { opacity: .18; background-image: linear-gradient(rgb(255 255 255 / 10%) 1px, transparent 1px), linear-gradient(90deg, rgb(255 255 255 / 10%) 1px, transparent 1px); background-size: 80px 80px; mask-image: linear-gradient(to right, #000, transparent 72%); }
.hero-content { position: relative; z-index: 2; padding-top: 80px; }
.hero-eyebrow { color: #d3f3df; }
.hero-content h1 { max-width: 840px; margin-bottom: 28px; font-size: clamp(52px, 7.6vw, 104px); line-height: .98; font-weight: 760; }
.hero-content h1 span { color: #9ada5d; }
.hero-copy { max-width: 680px; margin-bottom: 36px; color: rgb(255 255 255 / 83%); font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.button { min-height: 48px; padding: 13px 22px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid transparent; border-radius: 999px; font-weight: 700; transition: transform .2s, background .2s, box-shadow .2s; }
.button:hover { transform: translateY(-2px); }
.button:focus-visible, button:focus-visible, a:focus-visible { outline: 3px solid #f3d462; outline-offset: 3px; }
.button-primary { color: white; background: linear-gradient(135deg, var(--blue), var(--green-deep)); box-shadow: 0 12px 30px rgb(20 90 73 / 28%); }
.button-ghost { color: white; border-color: rgb(255 255 255 / 35%); background: rgb(255 255 255 / 8%); backdrop-filter: blur(10px); }
.hero-facts { position: absolute; z-index: 2; bottom: 36px; left: 50%; transform: translateX(-50%); display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid rgb(255 255 255 / 24%); }
.hero-facts div { padding: 22px 30px 0; border-left: 1px solid rgb(255 255 255 / 20%); }
.hero-facts div:first-child { border-left: 0; padding-left: 0; }
.hero-facts strong, .hero-facts span { display: block; }
.hero-facts strong { margin-bottom: 6px; font-size: 17px; }
.hero-facts span { color: rgb(255 255 255 / 64%); font-size: 13px; }

.about-section { background: white; }
.about-grid { display: grid; grid-template-columns: .8fr 1.35fr; gap: 80px; }
.about-content .lead { margin-bottom: 24px; font-size: clamp(22px, 3vw, 32px); line-height: 1.5; font-weight: 620; }
.about-content > p:not(.lead) { color: var(--muted); }
.mission-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 38px; }
.mission-row div { padding: 22px; border: 1px solid var(--line); border-radius: 18px; background: var(--paper); }
.mission-row span, .mission-row strong { display: block; }
.mission-row span { margin-bottom: 8px; color: var(--green-deep); font-size: 12px; font-weight: 750; }
.mission-row strong { line-height: 1.5; }

.lifecycle { padding: 108px 0; background: linear-gradient(180deg, #edf6f1, var(--paper)); overflow: hidden; }
.cycle-wrap { position: relative; display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.cycle-track { position: absolute; top: 38px; left: 9%; right: 9%; height: 2px; background: linear-gradient(90deg, var(--blue), var(--green)); }
.cycle-step { position: relative; z-index: 1; padding: 0 8px; text-align: center; }
.cycle-step > span { width: 42px; height: 42px; margin: 18px auto 22px; display: grid; place-items: center; color: white; background: var(--forest); border: 7px solid #edf6f1; border-radius: 50%; font-size: 11px; }
.cycle-step svg { width: 40px; height: 40px; margin: 0 auto 18px; fill: none; stroke: var(--green-deep); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.cycle-step h3 { margin-bottom: 8px; font-size: 19px; }
.cycle-step p { margin-bottom: 0; color: var(--muted); font-size: 13px; line-height: 1.6; }

.business-section { background: white; }
.business-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.business-card { position: relative; min-height: 310px; padding: 36px; border: 1px solid var(--line); border-radius: var(--radius); background: #fbfdfc; overflow: hidden; transition: transform .25s, box-shadow .25s; }
.business-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.business-card-featured { color: white; background: linear-gradient(145deg, #1858b4, #2f70ec); border-color: transparent; }
.business-card-dark { color: white; background: linear-gradient(145deg, #073a31, #0b604b); border-color: transparent; }
.card-index { position: absolute; top: 26px; right: 30px; color: currentColor; opacity: .22; font-size: 48px; font-weight: 800; }
.card-icon { width: 48px; height: 48px; margin-bottom: 34px; display: grid; place-items: center; color: var(--green-deep); background: #e8f4ed; border-radius: 14px; }
.business-card-featured .card-icon, .business-card-dark .card-icon { color: white; background: rgb(255 255 255 / 14%); }
.card-icon svg { width: 26px; height: 26px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.business-card h3 { margin-bottom: 14px; font-size: 28px; }
.business-card p { max-width: 620px; margin-bottom: 14px; color: var(--muted); }
.business-card-featured p, .business-card-dark p { color: rgb(255 255 255 / 76%); }
.business-card ul { padding: 0; margin: 24px 0 0; display: flex; flex-wrap: wrap; gap: 8px; list-style: none; }
.business-card li { padding: 7px 10px; border: 1px solid rgb(255 255 255 / 20%); border-radius: 999px; font-size: 12px; }

.products-section { background: linear-gradient(180deg, #f7faf8, #edf5f1); }
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.product-card { position: relative; min-height: 390px; padding: 30px; display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: 24px; background: white; overflow: hidden; transition: color .28s, background .28s, border-color .28s, transform .25s, box-shadow .25s; }
.product-card:hover, .product-card:focus-visible { color: white; border-color: transparent; background: linear-gradient(150deg, #1d5fc3, #0b5445); transform: translateY(-7px); box-shadow: 0 24px 55px rgb(10 65 53 / 20%); }
.product-type { position: absolute; top: 26px; right: 26px; color: var(--green-deep); opacity: .38; font-size: 11px; font-weight: 800; letter-spacing: .12em; }
.product-card:hover .product-type, .product-card:focus-visible .product-type { color: white; }
.product-icon { width: 52px; height: 52px; margin-bottom: 52px; display: grid; place-items: center; color: var(--green-deep); background: #eaf5ef; border-radius: 15px; }
.product-card:hover .product-icon, .product-card:focus-visible .product-icon { color: white; background: rgb(255 255 255 / 14%); }
.product-icon svg { width: 28px; height: 28px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.product-label { margin-bottom: 7px; color: var(--green-deep); font-size: 12px; font-weight: 750; letter-spacing: .08em; }
.product-card:hover .product-label, .product-card:focus-visible .product-label { color: #c7efaa; }
.product-card h3 { margin-bottom: 14px; font-size: 25px; }
.product-card > p:not(.product-label) { margin-bottom: 24px; color: var(--muted); font-size: 14px; }
.product-card:hover > p:not(.product-label), .product-card:focus-visible > p:not(.product-label) { color: rgb(255 255 255 / 70%); }
.product-status { padding-top: 18px; margin-top: auto; border-top: 1px solid var(--line); color: var(--green-deep); font-size: 12px; font-weight: 700; }
.product-status b { float: right; font-weight: 750; }
.product-card:hover .product-status, .product-card:focus-visible .product-status { color: #d7efc6; border-color: rgb(255 255 255 / 18%); }
.product-disclosure { margin-top: 18px; padding: 20px 24px; display: grid; grid-template-columns: 110px 1fr; gap: 22px; border: 1px solid #d3e4dc; border-radius: 16px; background: rgb(255 255 255 / 72%); }
.product-disclosure strong { color: var(--green-deep); }
.product-disclosure p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.65; }

.technology-section { color: white; background: var(--forest); }
.technology-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 90px; align-items: center; }
.technology-copy > p:not(.eyebrow):not(.tech-name) { color: rgb(255 255 255 / 68%); }
.tech-name { margin: 20px 0; color: #a9df77; font-weight: 700; }
.tech-tags { margin-top: 30px; display: flex; flex-wrap: wrap; gap: 9px; }
.tech-tags span { padding: 9px 12px; border: 1px solid rgb(255 255 255 / 16%); border-radius: 999px; color: rgb(255 255 255 / 78%); font-size: 13px; }
.technology-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.technology-card { min-height: 300px; padding: 28px; display: flex; flex-direction: column; background: rgb(255 255 255 / 7%); border: 1px solid rgb(255 255 255 / 11%); border-radius: 22px; }
.technology-card-head { margin-bottom: auto; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.technology-card-head span { color: rgb(255 255 255 / 34%); font-size: 38px; font-weight: 800; }
.technology-card-head strong { padding: 7px 10px; color: #c9efa5; border: 1px solid rgb(169 223 119 / 32%); border-radius: 999px; font-size: 11px; }
.technology-card h3 { margin: 42px 0 14px; font-size: 24px; line-height: 1.28; }
.technology-card p { margin-bottom: 0; color: rgb(255 255 255 / 62%); font-size: 13px; line-height: 1.72; }
.technology-note { grid-column: 1/-1; margin: 4px 2px 0; color: rgb(255 255 255 / 48%); font-size: 12px; }

.solutions-section { background: white; }
.solution-tabs { display: inline-flex; gap: 5px; padding: 5px; margin-bottom: 20px; background: #edf3f0; border-radius: 999px; }
.solution-tabs button { padding: 11px 18px; border: 0; border-radius: 999px; color: var(--muted); background: transparent; cursor: pointer; transition: color .2s, background .2s; }
.solution-tabs button[aria-selected="true"] { color: white; background: var(--forest); }
.solution-panels > article { min-height: 430px; padding: 48px; display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; color: white; background: linear-gradient(135deg, #0a4438, #126956); border-radius: 30px; overflow: hidden; }
.solution-panels h3 { margin-bottom: 18px; font-size: clamp(30px, 4vw, 48px); }
.solution-panels p { color: rgb(255 255 255 / 72%); }
.panel-kicker { margin-bottom: 10px; color: #b7e988 !important; font-size: 13px; font-weight: 700; letter-spacing: .08em; }
.solution-panels ul { padding-left: 18px; line-height: 2; color: rgb(255 255 255 / 78%); }
.solution-panels img { width: 100%; height: 310px; object-fit: cover; border-radius: 18px; }
.energy-diagram { min-height: 300px; display: grid; grid-template-columns: 1fr auto 1.3fr auto 1fr; grid-template-rows: 1fr auto 1fr; gap: 12px; align-items: center; }
.energy-node { min-height: 86px; display: grid; place-items: center; padding: 16px; border: 1px solid rgb(255 255 255 / 22%); border-radius: 18px; background: rgb(255 255 255 / 8%); text-align: center; font-weight: 700; }
.energy-node.core { background: linear-gradient(135deg, var(--blue), #3c9e7f); box-shadow: 0 15px 40px rgb(0 0 0 / 20%); }
.energy-node.battery { grid-column: 3; grid-row: 3; }
.energy-flow { color: #a9df77; font-size: 24px; }
.energy-branch { grid-column: 3; grid-row: 2; justify-self: center; color: #a9df77; font-size: 24px; }
.energy-diagram.compact { grid-template-columns: 1fr 1fr 1.5fr; grid-template-rows: 1fr 1fr; }
.energy-diagram.compact .core { grid-column: 2; grid-row: 1 / 3; }
.solution-note { margin: 16px 8px 0; color: var(--muted); font-size: 12px; }

.projects-section { background: #edf5f1; }
.project-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 18px; }
.project-card { position: relative; min-height: 250px; padding: 28px; background: white; border-radius: 22px; overflow: hidden; box-shadow: 0 10px 35px rgb(11 53 44 / 6%); }
.project-photo { grid-column: span 3; min-height: 420px; padding: 0; }
.project-photo img { width: 100%; height: 100%; object-fit: cover; }
.project-photo::after { content: ""; position: absolute; inset: 30% 0 0; background: linear-gradient(transparent, rgb(2 27 22 / 92%)); }
.project-photo > div { position: absolute; z-index: 1; inset: auto 30px 26px; color: white; }
.project-photo span, .location-status { color: #a9df77; font-size: 12px; font-weight: 750; letter-spacing: .08em; }
.project-photo h3 { margin: 7px 0; font-size: 25px; }
.project-photo p { margin-bottom: 0; color: rgb(255 255 255 / 70%); font-size: 13px; }
.project-location { grid-column: span 2; display: flex; flex-direction: column; justify-content: flex-end; }
.project-location-main { grid-column: 1 / -1; min-height: 280px; }
.project-location::before { content: ""; position: absolute; top: 28px; right: 28px; width: 58px; height: 58px; border: 1px solid var(--line); border-radius: 50%; background: radial-gradient(circle at center, var(--green) 0 4px, transparent 5px); }
.project-location h3 { margin: 10px 0; font-size: 23px; }
.project-location p { margin-bottom: 0; color: var(--muted); font-size: 13px; }
.project-map { margin-top: 18px; display: grid; grid-template-columns: 1.35fr .65fr; min-height: 390px; overflow: hidden; border-radius: 24px; background: white; box-shadow: 0 10px 35px rgb(11 53 44 / 6%); }
.project-map-frame { min-height: 390px; background: #dfeae5; }
.project-map-frame .map-open { position: relative; width: 100%; height: 100%; min-height: 390px; padding: 0; display: block; overflow: hidden; border: 0; background: none; cursor: pointer; text-align: left; }
.project-map-frame img { width: 100%; height: 100%; min-height: 390px; display: block; object-fit: cover; transition: transform .35s; }
.project-map-frame span { position: absolute; right: 22px; bottom: 20px; padding: 10px 14px; color: white; border-radius: 999px; background: rgb(7 58 49 / 90%); font-size: 12px; font-weight: 700; }
.project-map-frame .map-open:hover img, .project-map-frame .map-open:focus-visible img { transform: scale(1.02); }
.project-map-info { padding: 44px 38px; display: flex; flex-direction: column; justify-content: center; }
.project-map-info h3 { margin: 10px 0 16px; font-size: 27px; }
.map-address { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.8; }
.map-nav-trigger { margin-top: 28px; padding: 13px 18px; color: white; border: 0; border-radius: 12px; background: var(--green-deep); font-size: 14px; font-weight: 750; cursor: pointer; }
.map-nav-trigger:hover, .map-nav-trigger:focus-visible { background: #084c3d; }
.map-tip { margin: 10px 0 0; color: var(--muted); font-size: 12px; text-align: center; }
.map-sheet-backdrop { position: fixed; z-index: 120; inset: 0; padding: 24px; display: flex; align-items: flex-end; justify-content: center; background: rgb(1 18 14 / 62%); backdrop-filter: blur(4px); opacity: 0; transition: opacity .25s; }
.map-sheet-backdrop.is-open { opacity: 1; }
.map-sheet { width: min(560px, 100%); max-height: calc(100vh - 48px); padding: 14px 26px 28px; overflow-y: auto; border-radius: 28px; background: white; box-shadow: 0 24px 80px rgb(0 0 0 / 28%); transform: translateY(35px); transition: transform .25s; }
.map-sheet-backdrop.is-open .map-sheet { transform: none; }
.map-sheet-handle { width: 44px; height: 5px; margin: 0 auto 15px; border-radius: 5px; background: #d8dfdc; }
.map-sheet-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; }
.map-sheet-head h2 { margin: 6px 0 0; font-size: 25px; }
.map-sheet-close { width: 40px; height: 40px; flex: 0 0 auto; color: var(--ink); border: 0; border-radius: 50%; background: #f0f4f2; font-size: 26px; line-height: 1; cursor: pointer; }
.map-sheet-address { margin: 12px 0 20px; color: var(--muted); font-size: 13px; }
.map-provider-list { overflow: hidden; border: 1px solid var(--line); border-radius: 18px; }
.map-provider-list a { min-height: 68px; padding: 10px 16px; display: grid; grid-template-columns: 46px 1fr auto; gap: 13px; align-items: center; color: var(--ink); border-bottom: 1px solid var(--line); background: white; }
.map-provider-list a:last-child { border-bottom: 0; }
.map-provider-list a:hover, .map-provider-list a:focus-visible { background: #f1f7f4; }
.map-provider-list strong { font-size: 16px; }
.map-provider-list small { color: var(--green-deep); font-size: 12px; font-weight: 700; }
.map-provider-icon { position: static !important; width: 42px; height: 42px; padding: 0 !important; display: grid; place-items: center; color: white; border-radius: 12px !important; background: #2777d6 !important; font-size: 20px !important; font-weight: 800 !important; }
.map-provider-icon.apple { color: #3478d4; background: linear-gradient(145deg, #d7f0ff, #f4d9f9) !important; }
.map-provider-icon.amap { background: linear-gradient(145deg, #52c8ff, #2671ef) !important; }
.map-provider-icon.baidu { background: linear-gradient(145deg, #3757e8, #7356dc) !important; }
.map-provider-icon.google { color: #1d6dcc; background: linear-gradient(135deg, #fff 35%, #f7d34f 36% 55%, #50a85e 56%) !important; border: 1px solid #e2e7e4; }

.news-section { background: white; }
.news-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 22px; }
.news-card { border: 1px solid var(--line); border-radius: 24px; overflow: hidden; background: var(--paper); }
.news-card img { width: 100%; height: 320px; object-fit: cover; }
.news-card-body { padding: 28px; }
.news-card-body span, .news-item span { color: var(--green-deep); font-size: 12px; font-weight: 750; letter-spacing: .08em; }
.news-card-body h3 { margin: 10px 0 12px; font-size: 27px; }
.news-card-body p, .news-item p { margin-bottom: 0; color: var(--muted); font-size: 13px; }
.news-list { display: grid; gap: 12px; }
.news-item { padding: 25px; border: 1px solid var(--line); border-radius: 20px; background: #fbfdfc; transition: border-color .2s, transform .2s; }
.news-item:hover { transform: translateX(4px); border-color: #9bcfb8; }
.news-item > div { display: flex; align-items: center; justify-content: space-between; gap: 15px; }
.news-item small { color: #82918c; }
.news-item h3 { margin: 11px 0 7px; font-size: 19px; }
.news-note { margin: 18px 4px 0; color: var(--muted); font-size: 12px; }

.cooperation-section { padding: 96px 0; color: white; background: linear-gradient(120deg, var(--blue-dark), var(--forest)); }
.cooperation-grid { display: grid; grid-template-columns: 1fr 1.25fr; gap: 80px; align-items: center; }
.cooperation-list { display: flex; flex-wrap: wrap; gap: 12px; }
.cooperation-list span { padding: 14px 18px; border: 1px solid rgb(255 255 255 / 22%); border-radius: 999px; background: rgb(255 255 255 / 7%); }

.contact-section { background: white; }
.contact-card { padding: 60px; display: grid; grid-template-columns: 1.4fr .6fr; gap: 60px; align-items: end; border: 1px solid var(--line); border-radius: 30px; background: linear-gradient(135deg, #f7fbf9, #e9f4ee); box-shadow: var(--shadow); }
.contact-card > div:first-child p:last-child { max-width: 720px; margin: 22px 0 0; color: var(--muted); }
.contact-actions { text-align: right; }
.contact-actions p { margin: 12px 0 0; color: var(--muted); font-size: 12px; }

.site-footer { padding: 70px 0 24px; color: rgb(255 255 255 / 74%); background: #031f1a; }
.footer-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 60px; padding-bottom: 45px; }
.footer-brand img { width: 132px; margin-bottom: 18px; filter: drop-shadow(0 8px 20px rgb(0 0 0 / 15%)); }
.footer-grid span { color: #8fd15a; font-size: 12px; font-weight: 750; }
.footer-grid p { margin: 10px 0 0; }
.footer-bottom { padding-top: 22px; display: flex; justify-content: space-between; border-top: 1px solid rgb(255 255 255 / 10%); font-size: 12px; }
.footer-bottom p { margin: 0; }

/* Product detail pages */
.detail-page { background: #f4f8f6; }
.detail-header { color: var(--ink); background: rgb(255 255 255 / 95%); box-shadow: 0 8px 30px rgb(3 31 25 / 8%); backdrop-filter: blur(18px); }
.detail-header .site-nav { color: var(--ink); }
.detail-hero { position: relative; padding: 176px 0 92px; color: white; background: linear-gradient(135deg, #0a4438 0%, #0c5b47 48%, #1d5fc3 140%); overflow: hidden; }
.detail-hero::after { content: ""; position: absolute; width: 520px; height: 520px; right: -130px; top: -170px; border: 1px solid rgb(255 255 255 / 12%); border-radius: 50%; box-shadow: 0 0 0 90px rgb(255 255 255 / 3%), 0 0 0 180px rgb(255 255 255 / 2%); }
.detail-breadcrumb { position: relative; z-index: 1; margin-bottom: 30px; color: rgb(255 255 255 / 60%); font-size: 13px; }
.detail-breadcrumb a:hover { color: white; }
.detail-hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.25fr .75fr; gap: 70px; align-items: end; }
.detail-hero h1 { max-width: 820px; margin-bottom: 22px; font-size: clamp(46px, 6.5vw, 82px); line-height: 1.04; }
.detail-hero-copy { max-width: 730px; margin-bottom: 0; color: rgb(255 255 255 / 72%); font-size: 17px; }
.detail-code { justify-self: end; color: rgb(255 255 255 / 13%); font-size: clamp(90px, 13vw, 180px); font-weight: 850; line-height: .8; }
.detail-section { padding: 92px 0; }
.detail-section.white { background: white; }
.detail-section-head { max-width: 760px; margin-bottom: 42px; }
.detail-section-head h2 { margin-bottom: 16px; font-size: clamp(32px, 4vw, 50px); }
.detail-section-head p { color: var(--muted); }
.detail-card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.detail-card { min-height: 230px; padding: 28px; border: 1px solid var(--line); border-radius: 22px; background: white; }
.white .detail-card { background: var(--paper); }
.detail-card-number { display: block; margin-bottom: 36px; color: var(--green); font-size: 12px; font-weight: 800; letter-spacing: .12em; }
.detail-card h3 { margin-bottom: 12px; font-size: 22px; }
.detail-card p { margin-bottom: 0; color: var(--muted); font-size: 14px; }
.system-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
.system-item { min-height: 150px; padding: 22px 16px; display: flex; flex-direction: column; justify-content: space-between; border-radius: 18px; color: white; background: var(--forest); }
.system-item:nth-child(even) { background: var(--green-deep); }
.system-item span { color: #b7e988; font-size: 11px; font-weight: 800; }
.system-item strong { font-size: 17px; line-height: 1.4; }
.selection-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 70px; align-items: start; }
.selection-grid h2 { font-size: clamp(32px, 4vw, 52px); }
.selection-list { display: grid; gap: 0; border-top: 1px solid var(--line); }
.selection-list article { padding: 22px 0; display: grid; grid-template-columns: 44px 1fr; gap: 16px; border-bottom: 1px solid var(--line); }
.selection-list span { width: 34px; height: 34px; display: grid; place-items: center; color: white; background: var(--green-deep); border-radius: 50%; font-size: 11px; }
.selection-list h3 { margin: 2px 0 7px; font-size: 18px; }
.selection-list p { margin: 0; color: var(--muted); font-size: 13px; }
.detail-process { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; counter-reset: process; }
.detail-process article { min-height: 190px; padding: 26px; border-radius: 20px; background: #eaf3ef; }
.detail-process article::before { counter-increment: process; content: "0" counter(process); display: block; margin-bottom: 40px; color: var(--green-deep); font-size: 12px; font-weight: 800; }
.detail-process h3 { margin-bottom: 8px; font-size: 18px; }
.detail-process p { margin: 0; color: var(--muted); font-size: 13px; }
.detail-note { margin-top: 24px; padding: 18px 22px; color: var(--muted); border-left: 3px solid var(--green); background: #eef5f1; font-size: 12px; line-height: 1.7; }
.detail-cta { padding: 78px 0; color: white; background: linear-gradient(110deg, #174fa9, #075144); }
.detail-cta .container { display: flex; align-items: center; justify-content: space-between; gap: 50px; }
.detail-cta h2 { margin-bottom: 10px; font-size: clamp(30px, 4vw, 48px); }
.detail-cta p { margin-bottom: 0; color: rgb(255 255 255 / 68%); }

[hidden] { display: none !important; }

/* === 滚动进场动画（仅在 JS 可用时启用，避免无脚本时白屏）=== */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .75s cubic-bezier(.22, .7, .2, 1), transform .75s cubic-bezier(.22, .7, .2, 1);
  will-change: opacity, transform;
}
html.js [data-reveal].is-visible { opacity: 1; transform: none; }
/* 卡片类元素进场时轻微缩放，更有层次 */
html.js .business-card[data-reveal], html.js .product-card[data-reveal],
html.js .project-card[data-reveal], html.js .cycle-step[data-reveal] {
  transform: translateY(28px) scale(.97);
}
html.js .business-card[data-reveal].is-visible,
html.js .product-card[data-reveal].is-visible,
html.js .project-card[data-reveal].is-visible,
html.js .cycle-step[data-reveal].is-visible { transform: none; }

@media (max-width: 960px) {
  .section { padding: 86px 0; }
  .site-header { height: 72px; color: white; }
  .site-header.scrolled { color: var(--ink); }
  .menu-toggle { display: block; color: inherit; }
  .site-nav { position: fixed; inset: 72px 20px auto; padding: 22px; display: none; flex-direction: column; align-items: stretch; gap: 4px; color: var(--ink); background: white; border-radius: 18px; box-shadow: var(--shadow); }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 12px 8px; }
  .nav-cta { margin-top: 8px; text-align: center; }
  .hero { min-height: 760px; }
  .hero-facts { grid-template-columns: 1fr; bottom: 25px; }
  .hero-facts div { display: none; }
  .hero-facts div:first-child { display: block; padding: 18px 0 0; }
  .about-grid, .technology-grid, .cooperation-grid { grid-template-columns: 1fr; gap: 45px; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .cycle-wrap { grid-template-columns: repeat(3, 1fr); row-gap: 38px; }
  .cycle-track { display: none; }
  .cycle-step > span { margin-top: 0; border-color: var(--paper); }
  .technology-card { min-height: 260px; }
  .solution-panels > article { grid-template-columns: 1fr; gap: 28px; }
  .project-photo { min-height: 360px; }
  .project-location { grid-column: span 3; }
  .project-location-main { grid-column: 1 / -1; }
  .project-map { grid-template-columns: 1fr; }
  .project-map-frame, .project-map-frame .map-open, .project-map-frame img { min-height: 340px; }
  .news-grid { grid-template-columns: 1fr; }
  .contact-card { grid-template-columns: 1fr; }
  .contact-actions { text-align: left; }
  .detail-hero-grid, .selection-grid { grid-template-columns: 1fr; gap: 35px; }
  .detail-code { display: none; }
  .detail-card-grid { grid-template-columns: 1fr 1fr; }
  .system-list { grid-template-columns: repeat(3, 1fr); }
  .detail-process { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .container, .nav-shell { width: min(calc(100% - 28px), var(--max)); }
  .section { padding: 68px 0; }
  .hero-content { padding-top: 40px; }
  .hero-content h1 { font-size: 50px; }
  .hero-copy { font-size: 15px; }
  .section-heading.split, .about-grid, .mission-row, .business-grid, .product-grid, .footer-grid { grid-template-columns: 1fr; }
  .section-heading.split { gap: 18px; }
  .cycle-wrap { grid-template-columns: 1fr 1fr; }
  .business-card { min-height: auto; padding: 28px; }
  .product-card { min-height: 340px; padding: 26px; }
  .product-disclosure { grid-template-columns: 1fr; gap: 8px; }
  .technology-cards { grid-template-columns: 1fr; }
  .technology-note { grid-column: auto; }
  .solution-tabs { width: 100%; overflow-x: auto; border-radius: 16px; }
  .solution-tabs button { flex: 0 0 auto; }
  .solution-panels > article { min-height: auto; padding: 28px 22px; }
  .energy-diagram { transform: scale(.93); margin-inline: -14px; }
  .project-grid { grid-template-columns: 1fr; }
  .project-photo, .project-location { grid-column: auto; }
  .project-photo { min-height: 330px; }
  .project-map-frame, .project-map-frame .map-open, .project-map-frame img { min-height: 300px; }
  .project-map-info { padding: 30px 24px; }
  .map-sheet-backdrop { padding: 12px; }
  .map-sheet { max-height: calc(100vh - 24px); padding: 12px 18px 20px; border-radius: 24px; }
  .map-sheet-head h2 { font-size: 22px; }
  .contact-card { width: calc(100% - 28px); padding: 34px 24px; }
  .footer-bottom { flex-direction: column; gap: 8px; }
  .detail-hero { padding: 132px 0 68px; }
  .detail-hero h1 { font-size: 45px; }
  .detail-card-grid, .system-list, .detail-process { grid-template-columns: 1fr; }
  .detail-card { min-height: auto; }
  .system-item { min-height: 118px; }
  .detail-cta .container { align-items: flex-start; flex-direction: column; }
}

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