:root{--ink:#09254d;--muted:#5e718c;--blue:#073bcf;--cyan:#00adc6;--orange:#ff8a19;--line:#dce5f1;--pale:#f0f6fe;--font:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:110px}body{margin:0;background:#fff;color:var(--ink);font-family:var(--font);font-size:16px;line-height:1.8;-webkit-font-smoothing:antialiased}button,input{font:inherit}button{color:inherit;cursor:pointer}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid var(--orange);outline-offset:5px}img{max-width:100%;display:block}h1,h2,h3,h4,p{margin:0}h1,h2,h3,h4{line-height:1.3}h2{font-size:clamp(30px,3.2vw,44px);letter-spacing:-.055em;font-weight:800}h3{font-size:23px;letter-spacing:-.035em}p{overflow-wrap:break-word}[hidden]{display:none!important}.wrap{width:min(1240px,calc(100% - 96px));margin-inline:auto}.section{padding-block:106px}.eyebrow{font-size:11px;font-weight:800;letter-spacing:.16em;line-height:1.5;color:var(--blue)}.section-intro .eyebrow,.section-heading .eyebrow,.submission-copy .eyebrow,.join-section .eyebrow,.faq-section .eyebrow{margin-bottom:21px}.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:34px;margin-bottom:44px}.section-heading>p{font-size:14px;line-height:1.9;color:var(--muted)}.text-link{display:inline-flex;align-items:center;gap:10px;border:0;padding:0;background:transparent;font-size:14px;font-weight:700;color:var(--blue);line-height:1.6}.text-link:hover{text-decoration:underline;text-underline-offset:5px}.button{display:inline-flex;align-items:center;justify-content:center;gap:35px;min-height:52px;padding:13px 25px;border:1px solid transparent;border-radius:3px;font-size:14px;font-weight:700;line-height:1.6;transition:background .18s ease,transform .18s ease}.button.primary{background:var(--blue);color:#fff}.button.primary:hover{background:#0028a1;transform:translateY(-2px)}.small-note{font-size:12px;color:var(--muted);line-height:1.8}.sr-only{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{position:fixed;top:10px;left:20px;z-index:100;padding:10px 18px;background:var(--blue);color:#fff;transform:translateY(-150%)}.skip-link:focus{transform:translateY(0)}
.site-header{position:sticky;z-index:50;top:0;height:86px;display:flex;align-items:center;justify-content:space-between;gap:28px;padding:0 max(36px,calc((100vw - 1320px)/2));border-bottom:1px solid #09254d17;background:#fffffff2;backdrop-filter:blur(18px)}.brand{display:inline-flex;flex-shrink:0;align-items:center;gap:12px;line-height:1}.brand-mark{display:grid;grid-template-columns:repeat(2,12px);gap:4px}.brand-mark i{width:12px;height:12px;background:var(--blue)}.brand-mark i:nth-child(2){background:var(--cyan)}.brand-mark i:last-child{background:var(--orange)}.brand strong{font-family:"Trebuchet MS",sans-serif;font-size:23px;letter-spacing:-.065em;font-weight:800}.brand-year{margin-left:3px;font-size:15px;letter-spacing:-.04em;color:#687c97}.brand small{display:block;margin-top:8px;font-size:10px;font-weight:700;letter-spacing:.12em}#main-nav{display:flex;align-items:center;gap:29px;font-size:13px;font-weight:600}#main-nav a{padding-block:12px;white-space:nowrap}#main-nav a:hover{color:var(--blue)}.nav-live{display:flex;gap:7px;align-items:center}.status-dot{width:5px;height:5px;display:inline-block;border-radius:50%;background:var(--orange)}.header-cta{display:flex;justify-content:space-between;align-items:center;gap:24px;min-height:39px;padding:8px 16px;border:1px solid var(--blue);border-radius:2px;color:var(--blue);font-size:12px;font-weight:700;white-space:nowrap}.header-cta:hover{color:#fff;background:var(--blue)}.menu-toggle{display:none}
.hero{position:relative;isolation:isolate;overflow:hidden;min-height:652px;background:#eff6ff}.hero-art{position:absolute;inset:0;z-index:-2;overflow:hidden}.hero-art img{width:100%;height:100%;object-fit:cover;object-position:center 56%}.hero:after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(90deg,#f7fbfff7 0%,#f7fbfff0 27%,#f7fbff8f 47%,#f7fbff00 69%)}.hero-inner{padding-top:57px;padding-bottom:43px}.hero .eyebrow{display:flex;align-items:center;gap:8px;font-size:10px;color:#486a99;letter-spacing:.12em}.tiny-square{width:6px;height:6px;display:inline-block;background:var(--orange)}.hero-kicker{margin-top:26px;color:var(--blue);font-size:16px;font-weight:700;letter-spacing:.03em}.hero h1{font-size:clamp(72px,7.8vw,112px);font-weight:900;letter-spacing:-.085em;line-height:1.12;margin:12px 0 16px -5px;color:#073593}.title-square{display:inline-block;width:.16em;height:.16em;margin-left:.08em;margin-bottom:.14em;background:var(--orange);font-size:inherit;color:transparent;vertical-align:baseline}.hero-motto{font-size:27px;font-weight:700;line-height:1.6;letter-spacing:-.025em}.hero-description{color:#5b718f;font-size:14px;line-height:1.95;margin-top:19px}.hero-actions{display:flex;align-items:center;gap:25px;margin-top:27px}.hero-actions .text-link{font-size:12px;color:#153e73}.hero-location{display:inline-flex;align-items:center;gap:23px;margin-top:38px}.hero-location>span{display:flex;flex-direction:column;line-height:1.4}.hero-location small{margin-top:7px;font-size:10px;color:#647d9b}.date-block{border-right:1px solid #c2d3eb;padding-right:24px}.date-block b{font-family:"Trebuchet MS",sans-serif;font-size:26px;font-weight:800;letter-spacing:-.045em}.location-block b{font-size:14px}.hero-coordinate{position:absolute;right:36px;bottom:31px;text-align:right;font-family:"Courier New",monospace;font-size:9px;line-height:1.7;letter-spacing:.1em;color:#123e7c}.event-strip{background:#082958;color:#c3d7f6}.event-strip .wrap{display:grid;grid-template-columns:repeat(4,1fr);padding-block:22px}.event-strip .wrap>span{font-size:12px;text-align:center;border-right:1px solid #35527b}.event-strip .wrap>span:first-child{text-align:left}.event-strip .wrap>span:last-child{border:0;text-align:right}.event-strip b{display:inline-block;margin-right:9px;color:#fff;font-family:"Trebuchet MS",var(--font);font-size:23px;font-weight:700;letter-spacing:-.03em}
.about{display:grid;grid-template-columns:1fr 1fr;gap:90px;align-items:start}.about h2{line-height:1.5}.about-copy{padding-top:3px;font-size:14px;color:var(--muted)}.about-copy .lead{margin-bottom:18px;color:var(--ink);font-size:22px;font-weight:700}.about-copy>p+p{margin-top:14px}.inline-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:25px}.inline-tags span{padding:4px 12px;color:var(--blue);background:#eff5ff;border:1px solid #dce8fd;font-size:11px}.tracks-section{background:#f4f7fc;border-block:1px solid #e5edf7;padding-block:88px 95px}.track-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.track{padding:0 26px 28px;background:#fff;border:1px solid #e0e8f3;border-radius:4px;overflow:hidden}.track-visual{position:relative;height:160px;margin:0 -26px 27px;overflow:hidden;background-color:#edf4ff;background-image:linear-gradient(#c4d7f24f 1px,transparent 1px),linear-gradient(90deg,#c4d7f24f 1px,transparent 1px);background-size:27px 27px}.track-visual:after{content:"";position:absolute;width:7px;height:7px;right:20px;top:20px;background:var(--orange)}.track-number{font-size:9px;color:#7191bc;letter-spacing:.15em;font-weight:700}.track h3{margin-top:11px;color:#0b3277;font-size:24px}.track-subtitle{margin:8px 0 18px;font-size:13px;font-weight:600;color:#5876a0}.track p:not(.track-subtitle){font-size:13px;line-height:1.95;color:var(--muted)}.track-topics{margin-top:25px;padding-top:17px;border-top:1px solid var(--line);font-size:10px;font-weight:600;color:#6b84a5}.orbit{position:absolute;top:32px;left:calc(50% - 65px);height:95px;width:130px;border:2px solid #3380e0;border-radius:50%;transform:rotate(37deg)}.orbit.two{transform:rotate(-37deg);border-color:#00a3ca}.nucleus{position:absolute;top:63px;left:calc(50% - 18px);width:36px;height:36px;background:#073bcf;transform:rotate(45deg);box-shadow:7px 7px 0 #073bcf24}.track-pixel{position:absolute;top:36px;left:calc(50% + 47px);width:11px;height:11px;border:2px solid #fff;background:#ff8a19;transform:rotate(45deg)}.city{display:flex;align-items:flex-end;justify-content:center;gap:5px;padding-bottom:32px}.city i{display:block;width:23px;height:60px;background:#1e64de;border:1px solid #ffffffaa;transform:skewY(-12deg);box-shadow:6px 3px 0 #0748af25}.city i:nth-child(2){height:40px;background:#5dbce7}.city i:nth-child(3){height:93px;background:#1150c4}.city i:nth-child(4){height:68px;background:#44b7dd}.city i:nth-child(5){height:40px;background:#ff991f}.city i:nth-child(6){height:75px;background:#377be9}.learning{display:flex;align-items:center;justify-content:center;gap:7px}.learning i{width:31px;height:31px;background:#245dcf;border:1px solid #fff;transform:translateY(35px)}.learning i:nth-child(2){transform:translateY(15px);background:#4e99e5}.learning i:nth-child(3){transform:translateY(-5px);background:#03a5c8}.learning i:nth-child(4){transform:translateY(-25px);background:#1260d6}.learning i:nth-child(5){transform:translateY(-45px);background:var(--orange);width:16px;height:16px}
.schedule-tabs{display:grid;grid-template-columns:repeat(3,1fr);border-bottom:2px solid var(--blue);margin-top:7px}.schedule-tabs button{position:relative;display:flex;align-items:center;gap:17px;background:#f2f6fc;color:#5e7698;border:0;border-right:2px solid #fff;padding:21px 25px;text-align:left}.schedule-tabs button strong{font-family:"Trebuchet MS",sans-serif;font-size:29px;line-height:1.2;letter-spacing:-.055em}.schedule-tabs button span{font-size:11px;font-weight:600}.schedule-tabs button .tab-arrow{position:absolute;right:22px;font-size:24px;font-weight:400}.schedule-tabs button.active{color:#fff;background:var(--blue)}.schedule-tabs button:hover:not(.active){background:#e3edfc;color:var(--blue)}.schedule-panel{padding-top:13px;min-height:340px}.schedule-row{display:grid;grid-template-columns:180px 1fr 66px;align-items:center;gap:25px;min-height:105px;padding:24px 25px;border-bottom:1px solid var(--line)}.schedule-row time{font-family:"Trebuchet MS",sans-serif;font-size:21px;letter-spacing:-.04em;font-weight:600;white-space:nowrap}.schedule-row h4{font-size:17px;font-weight:700}.schedule-row p{font-size:12px;color:var(--muted);margin-top:6px}.event-tag{text-align:center;justify-self:end;width:46px;padding:3px 6px;background:#eef2f8;color:#6b7f9c;border-radius:2px;font-size:10px;line-height:1.7}.event-tag.blue{background:#e7efff;color:#1550c4}.event-tag.orange{background:#fff0df;color:#b25a00}.schedule-note{font-size:11px;line-height:1.8;color:#73859c;margin:21px 25px 0}.gotc-callout{position:relative;background:#edf4fe;padding:32px;margin-top:16px;border-left:3px solid var(--orange)}.gotc-callout h3{margin:12px 0 10px;font-size:25px}.gotc-callout p{color:#5a759b;font-size:13px;max-width:800px}
.judging-section{background:#082858;color:#fff;padding-block:89px 84px;position:relative;overflow:hidden}.judging-section:before{content:"";position:absolute;top:-50px;right:-42px;width:260px;height:260px;border:1px solid #2967b652;transform:rotate(20deg);box-shadow:0 0 0 35px #2967b616,0 0 0 70px #2967b60c;pointer-events:none}.judging-section .wrap{position:relative}.judging-section .eyebrow{color:#73b7ff}.score-total{display:flex;gap:17px;align-items:center}.score-total>strong{font-family:"Trebuchet MS",sans-serif;font-size:68px;letter-spacing:-.06em;line-height:1;font-weight:600}.score-total>span{font-size:11px;color:#9bb6da;line-height:1.8}.rules-notice{display:flex;gap:18px;align-items:flex-start;background:#14396b;border-left:2px solid var(--orange);padding:17px 20px;font-size:11px;color:#bad0ed;line-height:1.9;margin-bottom:29px}.rules-notice strong{flex:0 0 174px;color:#e7f0fc;font-weight:600}.score-table-head,.score-row{display:grid;grid-template-columns:33% 12% 1fr;align-items:center;gap:20px}.score-table-head{color:#88a9d2;font-size:10px;padding:0 22px 15px;letter-spacing:.04em;border-bottom:1px solid #45638b}.score-row{min-height:84px;padding:19px 22px;border-bottom:1px solid #2d4b76}.score-row h3{font-size:16px;font-weight:600;letter-spacing:0}.score-row h3 span{font-family:"Courier New",monospace;font-size:10px;margin-right:17px;color:#7ba3d5}.score-row>strong{font-family:"Trebuchet MS",sans-serif;font-size:31px;font-weight:600;line-height:1;color:#9fd3ff;letter-spacing:-.04em}.score-row>strong small{margin-left:5px;font-family:var(--font);color:#89a9d0;font-weight:400;font-size:10px}.score-row p{font-size:12px;color:#bed0e8;line-height:1.9}.judging-notes{display:grid;grid-template-columns:repeat(3,1fr);gap:35px;margin:35px 22px 36px}.judging-notes p{font-size:11px;line-height:1.9;color:#9fb8d9}.judging-notes strong{display:block;margin-bottom:8px;font-size:12px;font-weight:600;color:#fff}.section-bottom{display:flex;align-items:center;gap:28px}.judging-section .button.primary{background:#fff;color:var(--blue)}.judging-section .button.primary:hover{background:#eaf2ff}.judging-section .text-link{color:#b5d9ff;font-size:12px}
.submission-section{display:grid;grid-template-columns:1fr 1fr;gap:100px;align-items:start}.submission-copy h2{line-height:1.5;margin-bottom:23px}.submission-copy>p:not(.eyebrow):not(.small-note){font-size:14px;line-height:2;color:var(--muted);max-width:360px;margin-bottom:27px}.submission-copy .small-note{margin-top:23px}.checklist{border:1px solid var(--line);border-top:3px solid var(--blue);padding:21px 27px 18px;box-shadow:0 16px 32px #173b7110}.checklist-heading{display:flex;justify-content:space-between;align-items:center;font-size:13px;font-weight:600;margin-bottom:13px}#check-count{font-family:"Trebuchet MS",sans-serif;font-size:14px;color:var(--blue)}.checklist label{display:flex;align-items:flex-start;gap:14px;padding:16px 0;border-top:1px solid #e8eef7;cursor:pointer}.checklist input{flex:0 0 auto;accent-color:var(--blue);width:17px;height:17px;margin:4px 0 0;cursor:pointer}.checklist label strong{display:block;font-weight:600;font-size:13px}.checklist label small{display:block;font-size:11px;color:#788ba4;margin-top:4px;line-height:1.7}.checklist input:checked+span{opacity:.6}.checklist input:checked+span strong{text-decoration:line-through;text-decoration-color:#839bbc}.checklist>.small-note{border-top:1px solid #e8eef7;padding-top:15px;font-size:10px}
.join-section{padding-block:82px;background-color:#edf5ff;background-image:linear-gradient(#b6d1f039 1px,transparent 1px),linear-gradient(90deg,#b6d1f039 1px,transparent 1px);background-size:43px 43px;border-block:1px solid #dce9f8}.join-grid{display:grid;grid-template-columns:1fr 335px;gap:100px;align-items:center}.join-section h2{color:#093795;line-height:1.45;font-size:46px;margin-bottom:22px}.join-section p:not(.eyebrow):not(.small-note){font-size:13px;color:#627c9d;line-height:2}.join-facts{display:flex;flex-wrap:wrap;align-items:center;gap:0;margin:23px 0 28px;font-size:11px;color:#496a94}.join-facts span{border-right:1px solid #b6cce7;padding-right:15px;margin-right:15px}.join-facts span:last-child{margin:0;padding:0;border:0}.join-section .small-note{margin-top:17px;font-size:10px}.qr-card{position:relative;display:flex;flex-direction:column;align-items:center;padding:28px 28px 25px;background:#fff;border:1px solid #d5e3f7;border-radius:3px;box-shadow:12px 12px 0 #b6d0f04d}.qr-card:before{content:"";position:absolute;top:-6px;right:-6px;width:12px;height:12px;background:var(--orange)}.qr-card img{width:183px;height:183px;object-fit:contain;margin-bottom:19px}.qr-card strong{font-size:15px;font-weight:600}.qr-card span{font-size:10px;color:#7890af;margin-top:7px}.faq-section{display:grid;grid-template-columns:.85fr 1.15fr;gap:80px}.faq-section h2{font-size:35px}.faq-list{border-top:1px solid var(--line)}.faq-list details{border-bottom:1px solid var(--line)}.faq-list summary{position:relative;list-style:none;font-size:14px;font-weight:600;line-height:1.8;padding:21px 40px 21px 0;cursor:pointer}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:"+";position:absolute;right:5px;top:19px;font-family:"Trebuchet MS",sans-serif;font-size:22px;font-weight:400;line-height:1.4;color:var(--blue)}.faq-list details[open] summary:after{content:"−"}.faq-list details p{padding:0 29px 23px 0;font-size:12px;line-height:2;color:var(--muted)}.organizers{padding:43px 0 48px;border-top:1px solid var(--line)}.organizers dl{display:grid;grid-template-columns:repeat(3,1fr);gap:29px 45px;margin:31px 0 23px}.organizers dt{color:#7a8da6;font-size:10px;margin-bottom:8px}.organizers dd{margin:0;color:#24456f;font-size:12px;font-weight:600;line-height:1.9}.organizers .small-note{font-size:10px}.site-footer{display:grid;grid-template-columns:1fr 1fr 1fr;align-items:center;gap:25px;padding:35px 0 37px;border-top:1px solid var(--line)}.footer-title{font-size:25px;letter-spacing:-.07em;font-weight:800;color:#073593}.footer-title span{color:var(--orange);font-size:12px;margin-left:8px;vertical-align:3px}.site-footer>p{font-size:11px;color:#6881a2;line-height:1.9}.site-footer p small{font-size:9px;color:#8c9db3}.site-footer>div{display:flex;flex-direction:column;align-items:flex-end;gap:8px}.site-footer>div a,.site-footer .text-link{color:#6a82a1;font-size:10px;font-weight:400}.toast{position:fixed;z-index:100;left:50%;bottom:28px;max-width:calc(100% - 32px);background:#082858;color:#fff;box-shadow:0 7px 28px #08285830;padding:12px 23px;border-radius:4px;font-size:13px;opacity:0;transform:translate(-50%,15px);transition:opacity .2s ease,transform .2s ease;pointer-events:none;overflow-wrap:anywhere}.toast.visible{opacity:1;transform:translate(-50%,0)}
@media(max-width:1180px){.site-header{padding-inline:28px;gap:20px}#main-nav{gap:21px;font-size:12px}.header-cta{gap:14px}.wrap{width:calc(100% - 72px)}.hero h1{font-size:96px}.hero-art img{object-position:57% center}.hero:after{background:linear-gradient(90deg,#f7fbff 0%,#f7fbfff2 32%,#f7fbff66 58%,#f7fbff00 80%)}.about,.submission-section{gap:55px}.track-grid{gap:18px}.track h3{font-size:21px}.schedule-tabs button{padding-inline:20px;gap:13px}.schedule-tabs button strong{font-size:26px}.schedule-tabs button span{font-size:10px}.schedule-tabs button .tab-arrow{display:none}.join-grid{gap:60px;grid-template-columns:1fr 300px}.faq-section{gap:60px}}
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}