:root{--blue:#0a67d8;--navy:#062a4b;--deep:#031d35;--text:#152238;--muted:#64748b;--line:#dbe7f3;--soft:#f4f8fc;--white:#fff}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Arial,"Microsoft YaHei","PingFang SC",sans-serif;color:var(--text);background:#fff}a{text-decoration:none;color:inherit}.container{width:min(1180px,92%);margin:auto}
.header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid #edf2f7}.nav{height:82px;display:flex;align-items:center;gap:28px}.logo{display:flex;align-items:center;margin-right:auto}.logo img{height:68px;width:auto}.navlinks{display:flex;gap:24px;align-items:center;font-size:14px}.navlinks a:hover{color:var(--blue)}
.btn{display:inline-block;padding:12px 20px;border-radius:6px;background:var(--blue);color:white;font-weight:700}.btn.alt{background:transparent;border:1px solid rgba(255,255,255,.75)}.btn.light{background:#fff;color:var(--blue);border:1px solid var(--blue)}
.hero{background:linear-gradient(90deg,rgba(3,29,53,.96) 0%,rgba(3,29,53,.85) 38%,rgba(3,29,53,.28) 68%,rgba(3,29,53,.12) 100%),url('assets/hero-plant.jpg') center/cover no-repeat;color:#fff}.hero-inner{min-height:420px;display:grid;grid-template-columns:1.1fr .9fr;align-items:center;gap:40px}.eyebrow{font-size:14px;letter-spacing:.14em;opacity:.8;text-transform:uppercase}h1{font-size:48px;line-height:1.15;margin:14px 0 18px}.hero p{font-size:19px;line-height:1.8;max-width:720px}.hero-actions{display:flex;gap:12px;margin-top:26px}.hero-side{justify-self:end;text-align:right}.hero-side strong{display:block;font-size:20px;line-height:1.5}.hero-side .en{margin-top:28px;letter-spacing:.12em;font-size:12px;line-height:1.7}
.section{padding:64px 0}.section.soft{background:var(--soft)}.section.dark{background:linear-gradient(120deg,#031d35,#073b67);color:#fff}.kicker{font-size:13px;color:var(--blue);font-weight:700;letter-spacing:.12em}.section.dark .kicker{color:#7fc3ff}h2{font-size:34px;margin:8px 0 14px;line-height:1.25}.lead{color:var(--muted);font-size:17px;line-height:1.8;max-width:840px}.section.dark .lead{color:#c6d7e8}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:28px}.card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px;box-shadow:0 6px 20px rgba(15,45,78,.05)}.card h3{margin:8px 0 8px;font-size:20px}.card p{margin:0;color:var(--muted);line-height:1.7}.icon{width:44px;height:44px;border-radius:10px;background:#e7f2ff;display:grid;place-items:center;color:var(--blue);font-weight:800}
.chain{margin-top:30px;display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.chain .step{padding:22px 14px;border:1px solid rgba(255,255,255,.18);border-radius:12px;background:rgba(255,255,255,.05);text-align:center}.chain .step strong{display:block;font-size:19px;margin:8px 0}.valuebar{margin-top:18px;padding:14px 16px;border-radius:10px;background:rgba(255,255,255,.08);text-align:center;font-size:14px}.trust{margin-top:14px;padding:12px 16px;border:1px solid rgba(127,195,255,.45);border-radius:10px;text-align:center;color:#cfe9ff;font-size:13px}
.products{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:28px}.product{min-height:220px;display:flex;flex-direction:column}.product small{color:var(--blue);font-weight:700}.product .tags{margin-top:auto;padding-top:18px;font-size:12px;color:#4f647a}
.solutions{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:26px}.solution{padding:28px;border-radius:14px;background:#fff;border:1px solid var(--line)}.cases{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:26px}.case{padding:22px;border-left:4px solid var(--blue);background:#fff;border-radius:8px;box-shadow:0 5px 16px rgba(15,45,78,.05)}.case .metric{font-size:28px;font-weight:800;color:var(--blue);margin-top:10px}
.why{display:grid;grid-template-columns:1.2fr repeat(4,.8fr);gap:14px;align-items:stretch}.why .reason{padding:20px;background:#fff;border:1px solid var(--line);border-radius:10px}
.footer{background:#071a2d;color:#d6e1ec;padding:40px 0 24px}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1.2fr 1fr;gap:28px}.footer h4{color:#fff;margin:0 0 12px}.footer p,.footer a{font-size:13px;line-height:1.8;color:#c6d1dc}.footnote{margin-top:28px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);font-size:12px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
@media(max-width:900px){.navlinks{display:none}.hero-inner{grid-template-columns:1fr;min-height:520px}.hero-side{justify-self:start;text-align:left}h1{font-size:38px}.grid4,.chain,.products,.solutions,.cases,.why,.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:640px){.grid4,.chain,.products,.solutions,.cases,.why,.footer-grid{grid-template-columns:1fr}h1{font-size:32px}h2{font-size:28px}.hero-actions{flex-direction:column;align-items:flex-start}}