*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:30px}body{margin:0;background:#fff;color:#242730;font-family:Arial,"Microsoft YaHei","PingFang SC",sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer}button,a{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible{outline:2px solid #155aef;outline-offset:5px}.header{height:70px;display:flex;align-items:center;justify-content:space-between;padding:0 4.167%;gap:24px;background:white}.brand{display:flex;align-items:center;gap:9px;white-space:nowrap;font-size:14px;font-weight:600}.brand img{width:30px;height:30px}.header nav{display:flex;align-items:center;gap:clamp(20px,4.5vw,68px);margin-left:auto;margin-right:clamp(25px,5.5vw,85px);font-size:13px}.header nav a,.header nav button{position:relative;border:0;background:none;padding:10px 0;white-space:nowrap}.header nav .active{color:#478ac7}.active:after{position:absolute;bottom:3px;left:0;right:0;height:2px;background:#478ac7;content:""}.user{display:flex;align-items:center;gap:8px;white-space:nowrap;background:none;border:0;padding:0;font-size:14px}.user svg{width:21px;height:21px}.hero{height:41.667vw;min-height:400px;max-height:650px;background:url("assets/banner.png") center/cover no-repeat;display:flex;align-items:center;padding:0 4.167%}.hero-copy{margin-top:5px}.hero h1{margin:0 0 12px;font-size:clamp(38px,4.45vw,68px);line-height:1.2;letter-spacing:-1.5px;font-weight:700;background:linear-gradient(100deg,#7a28e9 0%,#145aeb 75%);background-clip:text;-webkit-background-clip:text;color:transparent}.hero p{margin:0;font-size:clamp(19px,2.12vw,31px);font-weight:600;line-height:1.5}.start{margin-top:62px;background:#1458ef;color:#fff;display:inline-flex;align-items:center;justify-content:center;gap:12px;width:167px;height:50px;border-radius:3px;font-size:18px}.start:hover{background:#0848d5}.start span{font-size:25px;font-weight:300}.section{padding-left:4.167%;padding-right:4.167%}.section-heading{display:flex;align-items:center;gap:38px;margin-bottom:44px}.section-heading h2{font-size:24px;margin:0;line-height:1.45;font-weight:600}.section-heading>p{font-size:18px;color:#777;margin:0;line-height:1.5}.contract{padding-top:70px;height:540px;background:linear-gradient(#ffffffdc,#ffffffdc),url("assets/contract-bg.png") center top/100% 100% no-repeat}.card{border:1px solid #eceef3;background:rgba(249,250,255,.66);padding:16px;min-width:0;transition:border-color .2s,box-shadow .2s}.card:hover{border-color:#c4d8f8;box-shadow:0 5px 20px #2444710b}.contract-card{width:370px;max-width:100%;min-height:323px}.contract-image{display:block;width:100%;height:112px;object-fit:fill;margin-bottom:18px}.card h3{font-size:18px;font-weight:500;line-height:1.5;margin:0 0 13px}.card>p{font-size:14px;line-height:1.5;color:#777;margin:0 0 13px}.tags{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:13px}.tags span{font-size:12px;color:#777;padding:5px 12px;background:#fff;border:1px solid #f0f1f5}.use{display:block;width:fit-content;padding:5px 9px;line-height:1.4;font-size:12px;border:1px solid #e8edf7;background:#f0f5fc;color:#4c8ac0}.use:hover{background:#e1edfc;color:#155aef}.high-tech .section-heading{margin-bottom:44px}.grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.grid .card{display:flex;flex-direction:column;min-height:284px}.grid .card>p{flex:1}.tech-image{height:auto;aspect-ratio:276/126;background:#fff2f2;display:flex;flex-direction:column;justify-content:center;align-items:center;margin-bottom:16px;padding:8px 0}.tech-image img{width:56px;height:56px;object-fit:contain;margin-bottom:4px}.tech-image strong{color:#ed0829;font-size:clamp(16px,1.7vw,25px);white-space:nowrap;line-height:1.3}.grid h3{white-space:nowrap}.policy{padding-top:70px;padding-bottom:142px}.policy .section-heading{margin-bottom:44px}.policy-image{width:100%;aspect-ratio:276/126;object-fit:fill;display:block;border-radius:3px;margin-bottom:16px}.chongqing{background:url("assets/national.png") center/100% 100%;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}.chongqing:before{content:"";position:absolute;left:13%;right:13%;top:31%;bottom:28%;background:linear-gradient(#003e81,#007ec2);filter:blur(7px)}.chongqing span{position:relative;font-size:clamp(18px,2vw,29px);font-weight:600;color:#fff;text-shadow:0 0 6px #75d1ff;white-space:nowrap}dialog{border:1px solid #e3e9f2;border-radius:8px;padding:32px;max-width:calc(100% - 32px);color:#242730;box-shadow:0 16px 80px #10234426}dialog::backdrop{background:#13213755}dialog h2{font-size:22px;margin:0 30px 18px 0}dialog p{color:#777;font-size:15px}.close{position:absolute;right:12px;top:8px;border:0;background:none;font-size:26px;color:#777}.dismiss{background:#155aef;color:white;border:0;border-radius:3px;padding:9px 22px;margin-top:14px}
@media(min-width:1500px){.section-heading h2{font-size:28px}.section-heading>p{font-size:20px}.card h3{font-size:20px}.card>p{font-size:16px}.contract{height:600px}.contract-card{width:420px}.contract-image{height:128px}}
@media(max-width:1000px){.header nav{gap:22px;margin-right:15px}.brand{font-size:12px}.hero{min-height:380px}.hero h1{font-size:4.45vw}.hero p{font-size:2.12vw}.section-heading{gap:25px}.section-heading h2{font-size:21px}.section-heading>p{font-size:15px}.grid{gap:14px}.grid .card{padding:12px}.grid h3{font-size:15px;white-space:normal}.tech-image img{width:42px;height:42px}.tech-image strong{font-size:1.7vw}.card>p{font-size:13px}}
@media(max-width:700px){.header{height:auto;min-height:68px;flex-wrap:wrap;padding-top:15px;padding-bottom:12px;gap:12px}.brand{font-size:13px}.brand img{width:28px;height:28px}.user{font-size:12px}.user svg{width:18px}.header nav{order:3;width:100%;justify-content:space-between;margin:0;gap:12px}.hero{min-height:390px;align-items:flex-start;padding-top:45px;background-position:62% center}.hero-copy{width:100%}.hero h1{font-size:clamp(24px,6.4vw,40px);letter-spacing:-1px}.hero p{font-size:clamp(12px,3.2vw,20px);max-width:100%;text-shadow:0 1px 8px white}.start{width:136px;height:43px;font-size:16px;margin-top:32px}.section-heading{align-items:flex-start;flex-direction:column;gap:9px;margin-bottom:26px!important}.section-heading h2{font-size:21px}.section-heading>p{font-size:14px}.contract{padding-top:38px;padding-bottom:40px;height:auto;background-size:auto 100%}.contract-card{width:100%;max-width:370px}.high-tech{padding-top:32px}.grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.grid .card{padding:12px;min-height:270px}.tech-image strong{font-size:clamp(12px,3vw,19px)}.tech-image img{width:40px;height:40px}.tech-image{min-height:88px}.chongqing span{font-size:3.3vw}.grid h3{font-size:15px}.policy{padding-top:40px;padding-bottom:60px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.card{transition:none}}


/* Centered standalone landing page */
body{background:#f5f7fa}
.header,main,.site-footer{width:calc(100% - 96px);max-width:1120px;margin-left:auto;margin-right:auto}
.header{padding:0 32px;height:70px}
.header nav{gap:28px;margin-right:28px}
main{background:#fff}
.hero{height:450px;min-height:0;max-height:none;padding:0 36px}
.hero h1{font-size:44px;letter-spacing:-1px}
.hero p{font-size:21px;font-weight:500}
.start{margin-top:48px;width:150px;height:46px;font-size:16px}
.section{padding-left:36px;padding-right:36px}
.section-heading{gap:28px;margin-bottom:32px}
.section-heading h2{font-size:22px}
.section-heading>p{font-size:16px}
.contract{padding-top:52px;height:470px}
.contract-card{width:330px;min-height:300px}
.contract-image{height:100px}
.card h3{font-size:16px}
.card>p{font-size:13px}
.grid{gap:16px}
.grid .card{min-height:270px;padding:14px}
.grid h3{white-space:normal}
.tech-image img{width:48px;height:48px}
.tech-image strong{font-size:17px}
.chongqing span{font-size:20px}
.high-tech .section-heading,.policy .section-heading{margin-bottom:32px}
.policy{padding-top:54px;padding-bottom:64px}
.site-footer{text-align:center;background:#fff;border-top:1px solid #eef0f4;padding:26px 24px 30px;font-size:14px;color:#737b88;margin-bottom:32px;letter-spacing:1px}
@media(max-width:1000px){.header,main,.site-footer{width:calc(100% - 48px)}.header{padding:0 24px}.header nav{gap:18px;margin-right:10px}.hero{height:390px;padding:0 28px}.hero h1{font-size:36px}.hero p{font-size:18px}.section{padding-left:28px;padding-right:28px}.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.tech-image strong{font-size:22px}.tech-image img{width:56px;height:56px}.chongqing span{font-size:25px}}
@media(max-width:700px){.header,main,.site-footer{width:calc(100% - 28px)}.header{height:auto;padding:15px 16px 12px;gap:12px}.brand{font-size:11px;gap:5px}.brand img{width:25px;height:25px}.user{font-size:11px;gap:4px}.header nav{width:100%;margin:0;gap:10px;font-size:12px}.hero{height:350px;min-height:0;padding:40px 20px 0}.hero h1{font-size:clamp(20px,5.5vw,34px)}.hero p{font-size:clamp(11px,2.75vw,17px)}.start{margin-top:30px;width:125px;height:40px;font-size:14px}.section{padding-left:20px;padding-right:20px}.section-heading h2{font-size:19px}.section-heading>p{font-size:13px}.contract{height:auto;padding-top:34px;padding-bottom:30px}.contract-card{width:100%;min-height:0}.contract-image{height:auto}.grid{gap:12px}.grid .card{padding:10px;min-height:255px}.grid h3{font-size:14px}.card>p{font-size:12px}.tech-image{min-height:78px}.tech-image img{width:34px;height:34px}.tech-image strong{font-size:clamp(10px,2.55vw,17px)}.chongqing span{font-size:clamp(11px,2.8vw,18px)}.policy{padding-top:34px;padding-bottom:40px}.site-footer{font-size:13px;margin-bottom:14px;padding:22px 12px}}
@media(max-width:370px){.grid{grid-template-columns:1fr}.tech-image strong{font-size:20px}.tech-image img{width:50px;height:50px}.chongqing span{font-size:24px}}

/* Full-width navigation; centered content remains unchanged. */
.header{width:100%;max-width:none;margin:0;padding-left:4.167%;padding-right:4.167%}
@media(max-width:700px){.header{width:100%;padding-left:20px;padding-right:20px}}