:root {
  --green: #b9dc3d;
  --green-bright: #d5f25a;
  --ink: #101814;
  --forest: #12261e;
  --paper: #f4f4ed;
  --white: #fff;
  --muted: #69716c;
  --line: rgba(16, 24, 20, .16);
  --max: 1360px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: "DM Sans", "Noto Sans SC", sans-serif; -webkit-font-smoothing: antialiased; }
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
img { display: block; width: 100%; }
.page-progress { position: fixed; z-index: 200; top: 0; left: 0; width: 0; height: 3px; background: var(--green-bright); }

.site-header { position: fixed; z-index: 100; top: 0; left: 0; width: 100%; height: 92px; display: flex; align-items: center; padding: 0 max(4vw, 32px); color: #fff; border-bottom: 1px solid rgba(255,255,255,.22); transition: background .35s, height .35s, color .35s, box-shadow .35s; }
.site-header.scrolled { height: 74px; color: var(--ink); background: rgba(244,244,237,.94); box-shadow: 0 8px 30px rgba(12,28,19,.08); backdrop-filter: blur(14px); border-bottom-color: transparent; }
.brand { display: inline-grid; grid-template-columns: 38px auto; grid-template-rows: auto auto; align-items: center; column-gap: 10px; min-width: 260px; }
.brand-mark { grid-row: 1 / 3; position: relative; display: flex; align-items: end; gap: 3px; width: 38px; height: 33px; transform: skew(-12deg); }
.brand-mark i { flex: 1; display: block; background: var(--green-bright); }
.brand-mark i:nth-child(1) { height: 48%; }.brand-mark i:nth-child(2) { height: 75%; }.brand-mark i:nth-child(3) { height: 100%; }
.brand-name { font-size: 26px; font-weight: 700; line-height: 1; letter-spacing: -.04em; }
.brand-desc { margin-top: 4px; font-size: 8px; font-weight: 600; letter-spacing: .13em; opacity: .72; }
.desktop-nav { display: flex; justify-content: center; gap: clamp(25px, 3.2vw, 54px); margin: 0 auto; }
.desktop-nav a { position: relative; font-size: 14px; font-weight: 500; }
.desktop-nav a::after { content: ""; position: absolute; bottom: -9px; left: 0; width: 0; height: 2px; background: var(--green); transition: width .25s; }
.desktop-nav a:hover::after, .desktop-nav a.active::after { width: 100%; }
.header-cta { display: flex; align-items: center; gap: 20px; min-width: 154px; justify-content: space-between; padding: 13px 18px; border: 1px solid currentColor; font-size: 13px; transition: background .25s, color .25s; }
.header-cta:hover { color: var(--ink); background: var(--green-bright); border-color: var(--green-bright); }
.menu-toggle { display: none; border: 0; background: none; width: 42px; height: 42px; padding: 9px; }
.menu-toggle span { display: block; height: 1px; margin: 7px 0; background: currentColor; transition: transform .3s; }
.mobile-nav { display: none; }

.hero { position: relative; min-height: 760px; height: 100svh; display: flex; align-items: center; color: #fff; overflow: hidden; background: #0d251c; }
.hero-media { position: absolute; inset: -4%; background: url("assets/hero-solar.jpg") center 58%/cover no-repeat; will-change: transform; }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(4,21,14,.82) 0%, rgba(8,27,19,.46) 52%, rgba(5,20,13,.12) 100%), linear-gradient(0deg, rgba(4,17,11,.48), transparent 45%); }
.hero-grid { position: absolute; inset: 0; opacity: .13; background-image: linear-gradient(rgba(255,255,255,.35) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.3) 1px, transparent 1px); background-size: 9vw 9vw; mask-image: linear-gradient(90deg, #000, transparent 75%); }
.hero-content { position: relative; z-index: 2; width: min(var(--max), 92vw); margin: 50px auto 0; }
.hero-kicker, .eyebrow { font-size: 12px; font-weight: 700; letter-spacing: .2em; }
.hero-kicker { margin: 0 0 28px; color: var(--green-bright); }
.hero h1 { max-width: 950px; margin: 0; font-family: "Noto Sans SC", sans-serif; font-size: clamp(58px, 7.6vw, 116px); font-weight: 300; line-height: 1.05; letter-spacing: -.065em; }
.hero h1 span { color: var(--green-bright); }
.hero-copy { max-width: 650px; margin: 30px 0 0 7px; font-size: 16px; font-weight: 300; line-height: 1.8; color: rgba(255,255,255,.78); }
.hero-actions { display: flex; align-items: center; gap: 38px; margin: 38px 0 0 7px; }
.button { display: inline-flex; min-width: 180px; align-items: center; justify-content: space-between; gap: 28px; padding: 17px 20px; font-size: 14px; font-weight: 600; transition: transform .25s, background .25s; }
.button:hover { transform: translateY(-3px); }
.button-primary { color: var(--ink); background: var(--green-bright); }
.text-link { padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,.5); font-size: 13px; }
.text-link span { margin-left: 26px; }
.hero-foot { position: absolute; z-index: 2; bottom: 28px; left: 4vw; right: 4vw; display: flex; justify-content: space-between; font-size: 10px; letter-spacing: .18em; color: rgba(255,255,255,.66); }
.scroll-cue { display: flex; align-items: center; gap: 12px; }
.scroll-cue i { display: block; width: 38px; height: 1px; background: var(--green); animation: scrollPulse 1.8s infinite; transform-origin: left; }
@keyframes scrollPulse { 0%,100%{transform:scaleX(.2);opacity:.4} 50%{transform:scaleX(1);opacity:1} }

.section-pad { padding: 130px max(4vw, 32px); }
.section-label { max-width: var(--max); display: flex; gap: 16px; align-items: center; margin: 0 auto 74px; font-size: 10px; letter-spacing: .2em; color: var(--muted); }
.section-label::after { content: ""; height: 1px; flex: 1; background: var(--line); }
.section-label span { color: var(--ink); font-weight: 700; }
.section-label.light { color: rgba(255,255,255,.47); }
.section-label.light::after { background: rgba(255,255,255,.17); }.section-label.light span { color: var(--green-bright); }
.intro-layout { max-width: var(--max); margin: auto; display: grid; grid-template-columns: 1fr 1fr; gap: 10vw; }
.eyebrow { margin: 0 0 25px; color: #5e6b64; }
h2 { margin: 0; font-family: "Noto Sans SC", sans-serif; font-size: clamp(40px, 5vw, 70px); font-weight: 400; line-height: 1.2; letter-spacing: -.055em; }
.intro-copy { padding-top: 48px; }
.intro-copy p { margin: 0 0 24px; color: var(--muted); font-size: 15px; line-height: 1.9; }
.intro-copy .lead { color: var(--ink); font-size: 20px; line-height: 1.8; }
.intro-visual { position: relative; max-width: var(--max); height: 620px; margin: 95px auto 0; overflow: hidden; }
.intro-visual img { height: 100%; object-fit: cover; }
.image-note { position: absolute; right: 0; bottom: 0; width: 290px; padding: 28px 34px; color: var(--ink); background: var(--green-bright); }
.image-note span { font-size: 9px; letter-spacing: .18em; }.image-note strong { display: block; margin-top: 16px; font-size: 22px; line-height: 1.35; }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); padding: 68px max(4vw, 32px); color: #fff; background: var(--forest); }
.stat { padding: 12px 4vw; border-right: 1px solid rgba(255,255,255,.15); }
.stat:last-child { border: 0; }
.stat strong { font-size: clamp(44px, 5vw, 78px); font-weight: 400; letter-spacing: -.05em; color: var(--green-bright); }
.stat sup { margin-left: 3px; font-size: .38em; vertical-align: super; }
.stat p { margin: 10px 0 0; font-size: 12px; color: rgba(255,255,255,.6); letter-spacing: .1em; }

.capabilities { color: #fff; background: #0e1814; }
.section-head { max-width: var(--max); margin: auto; display: grid; grid-template-columns: 1.4fr .6fr; gap: 10vw; align-items: end; }
.section-head .eyebrow, .capabilities .eyebrow { color: var(--green-bright); }
.section-head > p { margin: 0; font-size: 15px; line-height: 1.85; color: rgba(255,255,255,.55); }
.capability-list { max-width: var(--max); display: grid; grid-template-columns: repeat(4, 1fr); margin: 85px auto 0; border-top: 1px solid rgba(255,255,255,.18); border-left: 1px solid rgba(255,255,255,.18); }
.capability-card { position: relative; min-height: 410px; padding: 30px; border-right: 1px solid rgba(255,255,255,.18); border-bottom: 1px solid rgba(255,255,255,.18); overflow: hidden; transition: background .35s, color .35s; }
.capability-card::after { content: ""; position: absolute; inset: auto -20% -50% -20%; height: 75%; border-radius: 50%; background: var(--green-bright); opacity: 0; transition: opacity .35s, transform .35s; transform: translateY(40px); }
.capability-card:hover { color: var(--ink); background: var(--green-bright); }
.capability-card:hover::after { opacity: .15; transform: translateY(0); }
.card-index { font-size: 10px; color: rgba(255,255,255,.5); }.capability-card:hover .card-index { color: var(--ink); }
.card-icon { width: 54px; height: 54px; margin: 60px 0 37px; }
.card-icon svg { width: 100%; height: 100%; fill: none; stroke: var(--green-bright); stroke-width: 1.3; }.capability-card:hover svg { stroke: var(--ink); }
.capability-card h3 { margin: 0 0 20px; font-size: 24px; font-weight: 500; }
.capability-card p { margin: 0; color: rgba(255,255,255,.54); font-size: 13px; line-height: 1.8; }.capability-card:hover p { color: rgba(16,24,20,.72); }
.card-en { position: absolute; z-index: 1; bottom: 25px; left: 30px; font-size: 9px; letter-spacing: .14em; color: rgba(255,255,255,.36); }.capability-card:hover .card-en { color: rgba(16,24,20,.6); }

.solutions-grid { max-width: var(--max); margin: auto; display: grid; grid-template-columns: .9fr 1.1fr; gap: 8vw; align-items: stretch; }
.solutions-content { display: flex; flex-direction: column; padding: 20px 0; }
.solutions-content > p:not(.eyebrow) { max-width: 520px; margin: 32px 0 0; font-size: 15px; line-height: 1.85; color: var(--muted); }
.solution-tabs { display: flex; gap: 28px; margin-top: 48px; border-bottom: 1px solid var(--line); }
.solution-tabs button { padding: 0 0 14px; border: 0; color: #8d928f; background: none; cursor: pointer; font-size: 13px; border-bottom: 2px solid transparent; }
.solution-tabs button.active { color: var(--ink); border-color: var(--green); }
.solution-detail { display: grid; grid-template-columns: 58px 1fr; gap: 18px; margin-top: auto; padding-top: 55px; }
.solution-number { color: #93a186; font-size: 12px; }
.solution-detail h3 { margin: 0 0 12px; font-size: 22px; font-weight: 500; }.solution-detail p { margin: 0; font-size: 13px; line-height: 1.75; color: var(--muted); }
.solutions-image { position: relative; min-height: 670px; overflow: hidden; background: #ddd; }
.solutions-image img { height: 100%; object-fit: cover; transition: opacity .28s, transform .6s; }
.solutions-image.is-changing img { opacity: .25; transform: scale(1.03); }
.image-corner { position: absolute; right: 0; top: 0; padding: 20px 25px; color: #fff; background: rgba(16,24,20,.75); font-size: 9px; line-height: 1.6; letter-spacing: .15em; }

.supply { color: #fff; background: #183529; }
.supply-intro { max-width: var(--max); margin: auto; display: grid; grid-template-columns: .8fr 1.2fr; }.supply-intro .eyebrow { color: var(--green-bright); }
.supply-flow { max-width: var(--max); margin: 90px auto 0; display: grid; grid-template-columns: repeat(4, 1fr); }
.flow-item { position: relative; padding: 32px 38px 0 0; border-top: 1px solid rgba(255,255,255,.25); }
.flow-item::before { content: ""; position: absolute; top: -5px; left: 0; width: 9px; height: 9px; border-radius: 50%; background: var(--green-bright); }
.flow-item::after { content: "→"; position: absolute; right: 20px; top: -12px; color: rgba(255,255,255,.35); }
.flow-item:last-child::after { display: none; }
.flow-item span { display: block; color: var(--green-bright); font-size: 11px; }.flow-item strong { display: block; margin: 28px 0 12px; font-size: 19px; }.flow-item p { margin: 0; color: rgba(255,255,255,.48); font-size: 12px; }

.guangzhou { min-height: 760px; display: grid; grid-template-columns: 1.15fr .85fr; background: #0e1814; }
.guangzhou-media { min-height: 650px; overflow: hidden; }.guangzhou-media img { height: 100%; object-fit: cover; filter: saturate(.75); }
.guangzhou-panel { padding: 95px clamp(40px, 7vw, 120px); color: #fff; align-self: center; }
.guangzhou-panel .section-label { margin: 0 0 70px; }.guangzhou-panel .eyebrow { color: var(--green-bright); }
.guangzhou-panel h2 { font-size: clamp(34px, 3.4vw, 54px); }
.guangzhou-panel > p:not(.eyebrow) { margin: 32px 0; color: rgba(255,255,255,.6); font-size: 14px; line-height: 1.9; }
.location-coord { display: flex; gap: 35px; padding-top: 25px; border-top: 1px solid rgba(255,255,255,.2); color: var(--green-bright); font-size: 11px; letter-spacing: .14em; }

.vision { text-align: center; background: var(--green-bright); }
.vision .eyebrow { color: var(--ink); }.vision h2 { font-size: clamp(52px, 7vw, 100px); font-weight: 300; }.vision h2 em { font-style: normal; color: #fff; }
.vision > p:not(.eyebrow) { max-width: 680px; margin: 35px auto 40px; line-height: 1.8; color: rgba(16,24,20,.7); }.button-dark { margin: auto; color: #fff; background: var(--ink); }

footer { display: grid; grid-template-columns: 1.2fr 1fr .7fr; gap: 60px; padding: 80px max(4vw, 32px) 30px; color: #fff; background: #0b120f; }
.brand-footer { min-width: 0; width: max-content; }.footer-brand p { margin: 18px 0 0; color: rgba(255,255,255,.4); font-size: 11px; letter-spacing: .14em; }
.footer-contact span { color: rgba(255,255,255,.4); font-size: 10px; letter-spacing: .15em; }.footer-contact a { display: block; margin: 15px 0 28px; font-size: 20px; }.footer-contact p { color: rgba(255,255,255,.5); font-size: 13px; }
.footer-nav { display: grid; align-content: start; gap: 14px; font-size: 13px; color: rgba(255,255,255,.65); }
.footer-bottom { grid-column: 1 / -1; display: flex; justify-content: space-between; padding-top: 35px; margin-top: 25px; border-top: 1px solid rgba(255,255,255,.13); color: rgba(255,255,255,.35); font-size: 10px; letter-spacing: .06em; }
.back-top { border: 0; color: rgba(255,255,255,.65); background: none; cursor: pointer; }

.reveal { opacity: 0; transform: translateY(30px); transition: opacity .8s ease, transform .8s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 1050px) {
  .desktop-nav, .header-cta { display: none; }.site-header { justify-content: space-between; }.menu-toggle { display: block; color: inherit; cursor: pointer; }.brand { min-width: 0; }
  .mobile-nav { position: fixed; z-index: 90; inset: 0; display: flex; flex-direction: column; justify-content: center; gap: 24px; padding: 100px 8vw 50px; color: #fff; background: var(--forest); transform: translateY(-110%); transition: transform .45s cubic-bezier(.76,0,.24,1); }
  .mobile-nav.open { transform: translateY(0); }.mobile-nav a { font-size: 34px; border-bottom: 1px solid rgba(255,255,255,.16); padding-bottom: 14px; }.menu-toggle.open span:first-child { transform: translateY(4px) rotate(45deg); }.menu-toggle.open span:last-child { transform: translateY(-4px) rotate(-45deg); }
  .site-header.menu-active { color: #fff; background: transparent; box-shadow: none; }
  .capability-list { grid-template-columns: repeat(2,1fr); }.solutions-grid { gap: 5vw; }.guangzhou { grid-template-columns: 1fr; }.guangzhou-panel { order: -1; }
}

@media (max-width: 720px) {
  .site-header { height: 72px; padding: 0 20px; }.brand-desc { display: none; }.brand { grid-template-rows: auto; }.brand-mark { grid-row: auto; width: 30px; height: 27px; }.brand-name { font-size: 23px; }
  .hero { min-height: 700px; }.hero-content { width: auto; margin: 40px 20px 0; }.hero h1 { font-size: clamp(48px, 14vw, 72px); line-height: 1.15; }.hero-copy { margin-top: 25px; font-size: 14px; }.hero-actions { align-items: flex-start; flex-direction: column; gap: 12px; }.hero-foot { left: 20px; right: 20px; }.hero-foot > span:first-child { display: none; }
  .section-pad { padding: 90px 20px; }.section-label { margin-bottom: 50px; }.intro-layout, .section-head, .solutions-grid, .supply-intro { grid-template-columns: 1fr; gap: 38px; }.intro-copy { padding: 0; }.intro-copy .lead { font-size: 17px; }.intro-visual { height: 430px; margin-top: 55px; }.image-note { width: 230px; padding: 20px; }
  .stats { grid-template-columns: repeat(2, 1fr); padding: 35px 20px; }.stat { padding: 25px 15px; border-bottom: 1px solid rgba(255,255,255,.15); }.stat:nth-child(2) { border-right: 0; }.stat:nth-child(3) { border-bottom: 0; }
  .capability-list { grid-template-columns: 1fr; margin-top: 55px; }.capability-card { min-height: 340px; }.card-icon { margin: 38px 0 28px; }
  .solutions-image { min-height: 460px; order: -1; }.solution-tabs { gap: 18px; overflow-x: auto; }.solution-tabs button { white-space: nowrap; }.solution-detail { margin-top: 20px; }
  .supply-flow { grid-template-columns: 1fr; margin-top: 60px; }.flow-item { padding: 26px 0 35px; }.flow-item::after { content: "↓"; right: 5px; top: auto; bottom: 8px; }
  .guangzhou { min-height: auto; }.guangzhou-media { min-height: 430px; }.guangzhou-panel { padding: 85px 20px; }.guangzhou-panel .section-label { margin-bottom: 55px; }
  footer { grid-template-columns: 1fr; gap: 35px; padding: 65px 20px 25px; }.footer-bottom { flex-direction: column; gap: 18px; }.back-top { padding: 0; text-align: left; }
}

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