:root{--bg:#10152e;--ink:#fff4df;--yellow:#ffcf70;--muted:#aab5d5;--line:#343e62;color-scheme:dark;font-family:"Microsoft YaHei","PingFang SC",sans-serif;color:var(--ink);background:var(--bg)}
*{box-sizing:border-box}body{margin:0}html{scroll-behavior:smooth;scroll-padding-top:24px}button,a,summary,input{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid var(--yellow);outline-offset:5px}svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}.svg-defs{position:absolute;width:0;height:0;overflow:hidden}.page{max-width:1536px;padding:0 5.4%;margin:auto;position:relative}.stars{position:fixed;inset:0;pointer-events:none;background-image:radial-gradient(circle at 13% 15%,#fce2a9 0 1px,transparent 2px),radial-gradient(circle at 75% 32%,#8699c4 0 1px,transparent 2px),radial-gradient(circle at 44% 72%,#778db4 0 1px,transparent 2px);background-size:311px 347px,233px 271px,467px 389px;opacity:.38}
header{height:93px;display:flex;align-items:center;gap:80px;position:relative;z-index:2}.brand{font-size:26px;font-weight:700;letter-spacing:2px;white-space:nowrap;color:var(--yellow)}.brand span{display:inline-block;font-size:32px;margin-right:9px;transform:rotate(-12deg)}nav{display:flex;gap:42px;font-size:15px}nav a{padding:12px 0;position:relative;white-space:nowrap}nav a:hover{color:var(--yellow)}nav a.active{color:var(--yellow)}nav a.active:after{content:"";position:absolute;bottom:2px;height:2px;left:0;right:0;background:var(--yellow);border-radius:3px}
.hero{position:relative;min-height:565px;display:flex;align-items:center;isolation:isolate}.hero-copy{width:52%;position:relative;z-index:2;padding:45px 0 20px;pointer-events:none}.hero-copy h1{font-size:clamp(36px,4.1vw,63px);line-height:1.5;font-weight:800;letter-spacing:1px;margin:0 0 25px;white-space:nowrap}.hero-copy>p:not(.launch-status){font-size:19px;line-height:1.9;color:#d2daf1;margin:0 0 30px}.small-break{display:none}.launch-button{pointer-events:auto;display:flex;align-items:center;gap:25px;padding:18px 26px;border:1px solid #ffe2a3;border-radius:36px;background:var(--yellow);color:#202237;font-size:21px;font-weight:700;box-shadow:0 6px 28px #ffcf7010;transition:transform .2s,background .2s}.launch-button:hover{background:#ffde96;transform:translateY(-3px)}.launch-button:disabled{cursor:wait;transform:none}.launch-button svg{width:27px}.byline{color:#8f9ec6;font-size:15px;margin-top:21px;letter-spacing:2px}.hero-copy .launch-status{min-height:25px;font-size:14px;color:var(--yellow);margin:13px 0 0;line-height:1.7}
.universe{position:absolute;width:65%;right:-5.7%;top:-15px;aspect-ratio:4/3;z-index:1}.space-scene{width:100%;height:100%;object-fit:contain;display:block;mask-image:linear-gradient(to right,transparent,#000 15%,#000 95%,transparent),linear-gradient(to bottom,transparent,#000 7%,#000 88%,transparent);mask-composite:intersect}.rocket-wrap{position:absolute;left:32%;top:22%;width:28%;transform:rotate(-13deg);pointer-events:none}.rocket-wrap img{width:100%;height:auto;display:block;animation:hover-rocket 5s ease-in-out infinite}.rocket-wrap.flying{animation:launch 1.7s cubic-bezier(.6,0,.7,.6) forwards}.rocket-wrap.flying img{animation:none}.rocket-wrap.gone{visibility:hidden}.planet{position:absolute;display:flex;align-items:center;gap:8px;border:1px solid #c9b779;background:#11182de8;color:var(--ink);border-radius:25px;padding:7px 12px;font-size:15px;min-height:40px;transition:transform .2s,background .2s}.planet:hover{transform:translateY(-4px);background:#343653}.planet i{width:8px;height:8px;border-radius:50%;background:var(--yellow);box-shadow:0 0 10px #ffcf7080}.planet svg{width:13px;height:17px}.earth{left:12%;top:33%}.saturn{right:4%;top:29%}.moon{right:14%;bottom:12%}.scene-hint{position:absolute;right:2%;top:43%;font:19px/1.6 "KaiTi","STKaiti",serif;transform:rotate(-8deg);color:#d4daf0}.scene-hint span{color:var(--yellow)}.countdown{position:absolute;top:38%;left:45%;font-size:90px;font-weight:800;color:var(--yellow);text-shadow:0 0 35px #ffd38c60;pointer-events:none}
.questions{position:relative;z-index:2;display:flex;align-items:center;gap:40px;border-top:1px solid #303a594d;padding:30px 0 28px;background:var(--bg);scroll-margin-top:20px}.questions h2{font-size:29px;white-space:nowrap;margin:0;letter-spacing:1px}.questions h2 span{color:var(--yellow);font-size:36px;vertical-align:-3px;margin-right:12px}.question-buttons{display:flex;flex:1;justify-content:space-between}.question-buttons button{background:none;border:0;color:#e1e6f8;display:flex;align-items:center;gap:13px;padding:10px 18px;font-size:16px;text-align:left;line-height:1.6}.question-buttons button+button{border-left:1px solid #424d74}.question-buttons button:hover{color:var(--yellow)}.question-buttons svg{width:15px;flex:none}.personal{position:relative;z-index:2}.personal details{border:1px solid #354265;border-radius:14px;background:#1a2038b3;margin-bottom:14px;overflow:hidden}.personal summary{display:flex;gap:23px;align-items:center;padding:17px 25px;cursor:pointer;list-style:none}.personal summary::-webkit-details-marker{display:none}.personal summary:hover{background:#ffffff04}.personal summary h2{font-size:22px;margin:0;font-weight:500}.section-icon{color:#99b1ff;width:28px;height:28px}.disclosure{margin-left:auto;width:18px;height:18px;transform:rotate(90deg);color:#a1b4e4}.personal details[open] .disclosure{transform:rotate(-90deg)}.detail-body{padding:0 28px 22px 76px;font-size:16px;line-height:1.9;color:#c9d2ec}.section-intro{margin:0 0 14px}.checklist{display:flex;flex-wrap:wrap;gap:16px 30px}.checklist label{display:flex;gap:10px;align-items:center;cursor:pointer;min-height:35px}.checklist input{accent-color:var(--yellow);width:19px;height:19px;cursor:pointer}.plan-note{color:var(--yellow);font-size:14px;margin:14px 0 0}.letter-body{max-width:850px}.letter-body p{margin:0 0 13px}.signature{text-align:right;color:var(--yellow)}footer{display:flex;justify-content:center;align-items:center;gap:28px;font:18px "KaiTi","STKaiti",serif;color:#abb7d7;padding:27px 0 35px;letter-spacing:2px}footer span{color:var(--yellow);font-size:17px}
 dialog{width:min(510px,calc(100% - 36px));border:1px solid #56628b;border-radius:23px;background:#1b2340;color:var(--ink);padding:32px;box-shadow:0 30px 100px #0008;max-height:85dvh}dialog::backdrop{background:#05091abb;backdrop-filter:blur(7px)}.close{position:absolute;right:14px;top:10px;background:none;border:0;color:#b2bedb;font-size:30px;width:40px;height:40px}.dialog-star{color:var(--yellow);font-size:32px}dialog h2{font-size:27px;line-height:1.5;margin:12px 0 16px}dialog p{font-size:17px;line-height:1.9;color:#cfd8ee}.discovery-thought{padding-left:15px;border-left:2px solid var(--yellow);color:#ffe3a7}#source{display:block;color:#99addc;font-size:12px;text-decoration:underline;line-height:1.8}#source[hidden]{display:none}.back-to-space{margin-top:24px;display:flex;align-items:center;gap:15px;background:var(--yellow);border:0;border-radius:24px;color:#202237;font-size:15px;padding:12px 20px}.back-to-space svg{width:19px}
@keyframes hover-rocket{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}@keyframes launch{0%{transform:translate(0,0) rotate(-13deg);opacity:1}100%{transform:translate(30%,-160%) rotate(8deg);opacity:0}}
@media(min-width:1450px){.hero{min-height:600px}}
@media(max-width:1100px){header{gap:35px}nav{gap:23px}.brand{font-size:23px}.hero{min-height:500px}.hero-copy h1{font-size:43px}.hero-copy>p:not(.launch-status){font-size:17px}.small-break{display:block}.universe{top:25px;width:64%}.questions{gap:20px}.questions h2{font-size:24px}.question-buttons button{font-size:14px;padding:9px 12px;gap:7px}.scene-hint{font-size:16px}.launch-button{font-size:18px}}
@media(max-width:760px){.page{padding:0 6%}header{height:auto;display:block;text-align:center;padding:23px 0 8px}.brand{font-size:24px}nav{justify-content:center;gap:21px;font-size:12px;margin-top:16px}.hero{display:flex;flex-direction:column;min-height:0}.hero-copy{width:100%;padding:27px 0 0;text-align:center}.hero-copy h1{font-size:clamp(29px,7.4vw,51px);line-height:1.5;letter-spacing:0;margin-bottom:17px}.hero-copy>p:not(.launch-status){font-size:15px;line-height:1.8;margin-bottom:22px}.small-break{display:none}.launch-button{margin:auto;font-size:17px;padding:14px 22px;gap:18px}.byline{font-size:12px;margin-top:14px}.hero-copy .launch-status{margin:6px 0 0;min-height:24px;font-size:12px}.universe{position:relative;right:auto;top:auto;width:113%;margin:-5px -6.5% 0;aspect-ratio:4/3}.planet{font-size:12px;padding:5px 10px;min-height:35px;gap:5px}.scene-hint{font-size:14px;top:42%;right:1%}.countdown{font-size:58px}.questions{display:block;padding:15px 0 20px}.questions h2{font-size:24px;margin-bottom:13px}.questions h2 span{font-size:28px}.question-buttons{display:block}.question-buttons button{width:100%;font-size:15px;padding:14px 0;justify-content:space-between}.question-buttons button+button{border-left:0;border-top:1px solid #303957}.personal summary{padding:15px 16px;gap:16px}.personal summary h2{font-size:18px}.section-icon{width:24px;height:24px}.detail-body{padding:0 19px 20px;font-size:15px}.checklist{display:grid;gap:9px}.letter-body{line-height:1.9}footer{font-size:14px;gap:14px;padding:21px 0 30px;letter-spacing:1px}dialog{padding:27px}dialog h2{font-size:24px}dialog p{font-size:16px}}
@media(max-width:360px){nav{gap:12px}.hero-copy h1{font-size:27px}.hero-copy>p:not(.launch-status){font-size:14px}.scene-hint{font-size:12px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}.rocket-wrap.flying{opacity:0}}@media(max-width:760px){.small-break{display:block}.scene-hint{top:auto;right:auto;left:5%;bottom:4%;font-size:13px;line-height:1.4;transform:rotate(-5deg)}}