@import url("https://fonts.googleapis.com/css2?family=Mulish:wght@400;500;600;700;800&display=swap");
:root{--ink:#171717;--body:#525252;--muted:#737373;--line:#e5e5e5;--soft:#f6f7fb;--brand:#4a4aff;--green:#07835f;--orange:#ef7b45}
*{box-sizing:border-box}html{scroll-behavior:smooth}.gc-tech{margin:0;color:var(--ink);background:#fff;font-family:Mulish,"PingFang SC","Microsoft YaHei",sans-serif;letter-spacing:0}.gc-tech a{color:inherit}.gc-tech main{overflow:hidden}.shell{width:min(1180px,calc(100% - 40px));margin:0 auto}
.gc-header{position:sticky;top:0;z-index:30;border-bottom:1px solid rgba(229,229,229,.9);background:rgba(255,255,255,.94);backdrop-filter:blur(16px)}.gc-nav{height:68px;display:flex;align-items:center;gap:30px}.gc-logo img{display:block;width:138px;height:auto}.gc-links{display:flex;gap:24px;align-items:center;margin-left:auto}.gc-links a{font-size:14px;font-weight:700;text-decoration:none}.gc-links a:hover{color:var(--brand)}.gc-login{padding:9px 17px;border:1px solid var(--line);border-radius:8px}.gc-start{padding:10px 17px;border-radius:8px;background:var(--brand);color:#fff!important}
.hero{padding:82px 0 70px;background:linear-gradient(180deg,#f7f8ff 0,#fff 82%)}.crumb{display:inline-block;margin-bottom:28px;color:var(--muted);font-size:13px;text-decoration:none}.eyebrow{margin:0 0 16px;color:var(--brand);font-size:12px;font-weight:800;text-transform:uppercase}.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) 380px;gap:70px;align-items:center}.hero h1{max-width:850px;margin:0;font-size:54px;line-height:1.12;font-weight:800}.lead{max-width:820px;margin:24px 0 0;color:var(--body);font-size:19px;line-height:1.75}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}.button{display:inline-flex;min-height:46px;align-items:center;justify-content:center;padding:0 22px;border:1px solid var(--line);border-radius:8px;background:#fff;font-size:14px;font-weight:800;text-decoration:none}.button.primary{border-color:var(--brand);background:var(--brand);color:#fff}.proof{padding:28px;border:1px solid #dfe2ef;border-radius:8px;background:#fff;box-shadow:0 24px 60px rgba(31,37,84,.1)}.proof strong{display:block;color:var(--brand);font-size:38px;line-height:1}.proof p{margin:12px 0 0;color:var(--body);font-size:14px;line-height:1.65}
.media-wide{margin:52px auto 0}.media-wide img,.media-wide video{display:block;width:100%;max-height:590px;object-fit:cover;border:1px solid #dfe2ef;border-radius:8px;background:#111}.media-wide figcaption{margin-top:12px;color:var(--muted);font-size:13px;line-height:1.6}.band{padding:86px 0}.band.soft{background:var(--soft)}.band.ink{background:#191b22;color:#fff}.section-head{max-width:850px;margin-bottom:42px}.section-head h2{margin:0;font-size:39px;line-height:1.22}.section-head p{margin:18px 0 0;color:var(--body);font-size:17px;line-height:1.75}.ink .section-head p{color:#c5c6ce}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}.card{min-height:235px;padding:30px;background:#fff}.card .num{color:var(--brand);font-size:12px;font-weight:800}.card h3{margin:38px 0 13px;font-size:21px;line-height:1.4}.card p{margin:0;color:var(--body);line-height:1.7}.ink .grid-3{background:#373a44;border-color:#373a44}.ink .card{background:#22252d}.ink .card p{color:#bfc1ca}
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.flow article{position:relative;min-height:180px;padding:24px;border:1px solid var(--line);border-radius:8px;background:#fff}.flow b{color:var(--brand);font-size:12px}.flow h3{margin:38px 0 10px;font-size:18px}.flow p{margin:0;color:var(--body);font-size:14px;line-height:1.6}.quote{padding:52px 0;background:var(--brand);color:#fff}.quote .shell{display:grid;grid-template-columns:180px 1fr;gap:40px}.quote p{margin:0;font-size:25px;line-height:1.6}.evidence{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center}.evidence img,.evidence video{display:block;width:100%;border:1px solid var(--line);border-radius:8px}.evidence-copy h2{margin:0;font-size:38px;line-height:1.25}.evidence-copy p{color:var(--body);font-size:17px;line-height:1.75}.metric-row{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:30px}.metric{padding:22px;border-left:3px solid var(--brand);background:#fff}.metric strong{display:block;font-size:29px}.metric span{color:var(--muted);font-size:13px}.faq{border-top:1px solid var(--line)}.faq details{border-bottom:1px solid var(--line);padding:22px 0}.faq summary{cursor:pointer;font-size:17px;font-weight:800}.faq p{max-width:900px;color:var(--body);line-height:1.75}
.tech-chain{display:grid;grid-template-columns:repeat(5,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}.tech-chain a{min-height:150px;padding:22px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);text-decoration:none}.tech-chain span{color:var(--brand);font-size:11px;font-weight:800}.tech-chain strong{display:block;margin-top:38px;font-size:17px;line-height:1.4}.final{padding:68px 0}.final .shell{display:flex;justify-content:space-between;gap:40px;align-items:center}.final h2{max-width:720px;margin:0;font-size:36px;line-height:1.3}
.gc-footer{padding:54px 0 34px;background:#15161b;color:#fff}.footer-grid{display:grid;grid-template-columns:1.6fr repeat(3,1fr);gap:48px}.footer-grid img{width:138px;filter:invert(1)}.footer-grid p{color:#a6a7ae;line-height:1.7}.footer-grid h3{font-size:14px}.footer-grid a{display:block;margin:10px 0;color:#c8c9cf;font-size:13px;text-decoration:none}.copyright{margin-top:42px;padding-top:24px;border-top:1px solid #303139;color:#8d8e95;font-size:12px}
.hub-hero{text-align:center}.hub-list{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.hub-list a{min-height:270px;padding:34px;border:1px solid var(--line);border-radius:8px;text-decoration:none;transition:.2s}.hub-list a:hover{transform:translateY(-4px);border-color:#b8b8ff;box-shadow:0 18px 45px rgba(45,45,100,.08)}.hub-list a:last-child{grid-column:1/-1}.hub-list span{color:var(--brand);font-size:12px;font-weight:800}.hub-list h2{margin:55px 0 13px;font-size:28px}.hub-list p{max-width:720px;color:var(--body);line-height:1.7}.media-selector{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0}.media-chip,.sound-toggle{padding:10px 14px;border:1px solid var(--line);border-radius:8px;background:#fff;font:700 13px inherit;cursor:pointer}.media-chip.is-active{border-color:var(--brand);background:#eeeeff;color:var(--brand)}
@media(max-width:900px){.gc-links a:not(.gc-start){display:none}.hero-grid,.evidence{grid-template-columns:1fr}.hero h1{font-size:44px}.grid-3{grid-template-columns:1fr 1fr}.flow{grid-template-columns:1fr 1fr}.tech-chain{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr 1fr}.quote .shell{grid-template-columns:1fr}.hub-list{grid-template-columns:1fr}.hub-list a:last-child{grid-column:auto}}
@media(max-width:640px){.shell{width:min(100% - 28px,1180px)}.gc-logo img{width:118px}.gc-start{padding:9px 12px}.hero{padding:52px 0}.hero h1{font-size:36px}.lead{font-size:17px}.proof{padding:22px}.band{padding:60px 0}.section-head h2,.evidence-copy h2{font-size:30px}.grid-3,.flow,.metric-row,.tech-chain,.footer-grid{grid-template-columns:1fr}.final .shell{align-items:flex-start;flex-direction:column}.final h2{font-size:29px}.actions .button{width:100%}.media-wide{margin-top:36px}.hub-list a{min-height:230px;padding:26px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

/* Keep the Chinese collection headline together at desktop widths. */
.gc-tech .hub-hero .shell{width:min(1240px,calc(100% - 40px))}
.gc-tech .hub-hero h1{max-width:none;font-size:52px;line-height:1.14;word-break:keep-all;text-wrap:balance}
@media(max-width:900px){.gc-tech .hub-hero h1{font-size:44px}}
@media(max-width:640px){.gc-tech .hub-hero .shell{width:min(100% - 28px,1180px)}.gc-tech .hub-hero h1{font-size:36px;word-break:normal}}