:root{color-scheme:dark;--bg:#080c16;--text:#f3f5fa;--muted:#a2acbe;--line:rgba(189,206,245,.15);--accent:#b9cafa}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:32px}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,"Helvetica Neue","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.7;-webkit-font-smoothing:antialiased}body:before{content:"";position:absolute;z-index:-1;inset:0 0 auto;height:950px;pointer-events:none;background:radial-gradient(ellipse at 78% 25%,#24375566,transparent 48%),radial-gradient(ellipse at 25% 48%,#292d552d,transparent 50%)}a{color:inherit;text-decoration:none}a:focus-visible{outline:3px solid #c5d6ff;outline-offset:7px}a,button{-webkit-tap-highlight-color:transparent}.wrap{width:min(1180px,calc(100% - 40px));margin-inline:auto}.header{display:flex;align-items:center;justify-content:space-between;min-height:100px;border-bottom:1px solid var(--line);gap:16px}.brand{display:flex;align-items:center;gap:12px;font-size:18px;letter-spacing:.16em;font-weight:750;line-height:1.25}.brand small{display:block;font-size:12px;color:var(--muted);letter-spacing:.18em;margin-top:4px;font-weight:400}.brand-symbol{font-size:40px;font-weight:350;letter-spacing:-.17em;line-height:1}.brand-symbol span{color:var(--accent)}nav{display:flex;align-items:center;gap:32px;font-size:14px}nav>a:first-child{color:var(--muted)}.nav-join{padding:9px 15px;border:1px solid var(--line);border-radius:6px}.nav-join span{margin-left:12px}.hero{padding-block:60px;display:grid;gap:48px;align-items:center}.eyebrow{font-size:12px;letter-spacing:.16em;color:var(--accent);margin:0 0 23px;font-weight:550}.eyebrow>span{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--accent);margin-right:10px;box-shadow:0 0 14px #abc5ff66}h1{font-size:clamp(72px,14vw,132px);font-weight:650;letter-spacing:-.065em;line-height:.95;margin:0}.headline{display:block;font-size:clamp(25px,5.9vw,40px);line-height:1.5;letter-spacing:.02em;margin-top:25px;font-weight:550}.intro{font-size:16px;color:var(--muted);line-height:1.95;margin:24px 0 30px}.button{display:inline-flex;align-items:center;justify-content:space-between;gap:30px;min-height:56px;padding:14px 23px;background:#d0ddff;color:#10182c;border-radius:6px;font-size:16px;font-weight:650;box-shadow:0 4px 32px #89a8f515;transition:background .2s,transform .2s}.button:hover{background:#e3ebff;transform:translateY(-2px)}.welcome{font-size:13px;color:var(--muted);margin-top:15px}.hero-note{display:flex;flex-wrap:wrap;gap:12px 28px;color:#6f7c94;font-size:12px;letter-spacing:.07em;margin-top:48px}.join-card{position:relative;background:linear-gradient(140deg,#a9bdf00d,#a9bdf003);border:1px solid #bdd0ff25;border-radius:14px;padding:26px;backdrop-filter:blur(14px);box-shadow:0 25px 90px #0003;max-width:420px;width:100%;justify-self:center;animation:appear .8s ease both}.card-top{display:flex;justify-content:space-between;align-items:center;color:#9dadca;font-size:12px;letter-spacing:.16em}.card-top>span:last-child{font-size:23px;line-height:1}.join-card h2{font-size:32px;line-height:1.4;font-weight:500;margin:22px 0 10px;letter-spacing:.03em}.join-card>p{font-size:14px;color:var(--muted);margin:0 0 24px}.qr-link{display:block;background:white;border-radius:8px;width:210px;height:210px;margin:0 auto;transition:transform .2s}.qr-link:hover{transform:scale(1.025)}.qr-link img{width:100%;height:100%;display:block;border-radius:8px}.qr-caption{text-align:center;margin-top:16px}.qr-caption strong{font-size:15px;font-weight:500;display:block}.qr-caption>span{display:block;font-size:12px;color:var(--muted);margin-top:4px}.card-bottom{display:flex;justify-content:space-between;gap:12px;font-size:12px;color:#8896ae;border-top:1px solid var(--line);padding-top:20px;margin-top:25px}.about{padding-block:56px;border-top:1px solid var(--line);display:grid;gap:28px}h2{font-size:clamp(26px,4vw,36px);font-weight:500;line-height:1.5;margin:0;letter-spacing:.01em}.about .eyebrow,.section-head .eyebrow{margin-bottom:18px}.about-copy>p{margin:0 0 16px;color:var(--muted);font-size:16px;line-height:1.95}.about-meta{display:flex;gap:44px;padding-top:16px}.about-meta>span{font-size:12px;color:#8795ae}.about-meta strong{display:block;font-size:24px;font-weight:450;color:#dce6fc;margin-bottom:2px}.activities{border-top:1px solid var(--line);padding-block:56px 72px}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:32px}.section-head>p{color:var(--muted);font-size:14px;display:none}.activity-grid{display:grid;gap:16px}.activity-grid article{padding:24px;border:1px solid var(--line);border-radius:8px;background:#c4d8ff03}.activity-number{display:flex;justify-content:space-between;color:#8d9fbf;font-size:13px;letter-spacing:.08em}.activity-number>span{font-size:24px;line-height:1}.activity-grid h3{font-size:20px;font-weight:500;margin:24px 0 10px}.activity-grid p{font-size:15px;color:var(--muted);margin:0 0 25px;line-height:1.85}.tag{font-size:12px;letter-spacing:.07em;color:#73849f}.footer{border-top:1px solid var(--line);padding-block:28px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;color:#8190a8;font-size:12px}.footer-brand{font-size:18px;letter-spacing:.13em;font-weight:600;color:#e0e6f2}.footer-brand span{font-size:12px;font-weight:400;margin-left:12px;letter-spacing:.06em}.skip{position:absolute;top:-100px;left:20px;z-index:10;background:#fff;color:#111;padding:12px}.skip:focus{top:12px}@keyframes appear{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}@media(min-width:600px){.wrap{width:min(1180px,calc(100% - 72px))}.activity-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.join-card{padding:30px}.hero{padding-block:72px}.section-head>p{display:block}}@media(min-width:960px){.hero{grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:80px;padding-block:76px 86px}.about{grid-template-columns:1fr 1.2fr;gap:80px;padding-block:66px}.activity-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.activity-grid article{padding:25px 22px}.join-card{max-width:364px;justify-self:end}.hero-note{margin-top:58px}.activities{padding-block:60px 84px}}@media(max-width:380px){nav{gap:12px}.nav-join{padding:9px 10px}nav>a:first-child{display:none}.eyebrow{letter-spacing:.1em;font-size:12px}.join-card{padding:22px}.hero-note{font-size:12px}.about-meta{gap:28px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}

.bilibili-link{display:inline-flex;gap:12px;align-items:center;max-width:100%;min-height:58px;padding:14px 18px;border:1px solid #fb729955;border-radius:8px;background:#fb729918;color:#ffd5e1;font-size:16px;font-weight:600;text-decoration:none;margin-block:6px 18px;transition:background .2s,border-color .2s}.bilibili-link img{flex:0 0 30px;filter:invert(62%) sepia(51%) saturate(1662%) hue-rotate(302deg) brightness(100%) contrast(98%)}.bilibili-link:hover{background:#fb72992d;border-color:#fb7299}.bilibili-link>span:last-child{margin-left:auto}.about-meta{flex-wrap:wrap;gap:20px 36px}.footer-credit{display:flex;flex-direction:column;gap:4px;line-height:1.8;font-size:13px}.footer-credit a{color:#c3d2ef;text-decoration:underline;text-underline-offset:4px}.footer-credit a:hover{color:#fff}@media(max-width:599px){.footer{align-items:flex-start;flex-direction:column}.bilibili-link{font-size:14px;padding:12px;gap:9px}.about-meta strong{font-size:22px}}

.hero-logo{display:block;width:540px;max-width:100%;height:auto;object-fit:contain}