:root{--ink:#14221b;--muted:#637168;--paper:#f7faf7;--white:#fff;--green:#176b45;--green-dark:#103d2a;--green-soft:#dff1e5;--coral:#e8573f;--line:#dbe4dd;--black:#111713;--radius:6px;--shadow:0 10px 28px rgba(13,45,29,.12)}
*{box-sizing:border-box;letter-spacing:0}
[hidden]{display:none!important}
html{background:#e8eeea;scroll-behavior:smooth}
body{margin:0;min-width:320px;color:var(--ink);background:var(--paper);font-family:"Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased}
body,button,input,textarea{font-size:16px}
a{color:inherit;text-decoration:none}
button,input,textarea{font:inherit}
button{cursor:pointer}
img{display:block;max-width:100%}
main,.site-header,.site-footer,.toast{width:100%;max-width:720px;margin:0 auto}
.site-header{height:58px;padding:0 18px;display:flex;align-items:center;justify-content:space-between;background:rgba(247,250,247,.96);position:sticky;top:0;z-index:20;border-bottom:1px solid rgba(219,228,221,.8)}
.brand{display:flex;align-items:center;gap:9px;font-weight:800}.brand-mark{width:28px;height:28px;border-radius:50%;background:var(--black);position:relative}.brand-mark:before,.brand-mark:after{content:"";position:absolute;width:9px;height:10px;border-radius:50%;background:var(--black);top:-3px}.brand-mark:before{left:2px}.brand-mark:after{right:2px}.brand-mark i{position:absolute;inset:7px 5px 4px;background:#fff;border-radius:50%}
.header-action{font-size:14px;color:var(--green);font-weight:700}
.toast{padding:12px 18px;color:#fff;position:relative;z-index:19}.toast-error{background:#a6382a}.toast-success{background:var(--green)}
.hero{height:620px;max-height:78dvh;min-height:500px;position:relative;overflow:hidden;background:var(--green-dark);color:#fff}
.hero-photo{width:100%;height:100%;object-fit:cover;object-position:60% center}.hero-shade{position:absolute;inset:0;background:rgba(4,22,13,.48)}
.hero-content{position:absolute;inset:auto 22px 38px;max-width:470px}.hero-brand{font-size:15px;font-weight:800;margin:0 0 10px}.hero h1{font-size:44px;line-height:1.08;margin:0 0 14px;font-weight:900}.hero-content>p:not(.hero-brand){margin:0 0 24px;font-size:18px;max-width:330px}.hero form{margin:0}
.button{border:0;border-radius:var(--radius);min-height:48px;padding:12px 20px;display:inline-flex;align-items:center;justify-content:center;font-weight:800;line-height:1.2;text-align:center;transition:transform .16s ease,background .16s ease,opacity .16s ease}.button:active{transform:scale(.985)}.button:disabled{opacity:.45;cursor:not-allowed}.button-primary{background:#fff;color:var(--green-dark)}.button-dark{background:var(--black);color:#fff}.button-coral{background:var(--coral);color:#fff}.button-outline{background:transparent;color:var(--ink);border:1px solid #aab8af}.button-block{width:100%}
.invite-notice{padding:13px 18px;background:var(--green-soft);color:var(--green-dark);text-align:center;font-size:14px}.stat-band{display:grid;grid-template-columns:repeat(3,1fr);background:#fff;border-bottom:1px solid var(--line)}.stat-band div{padding:18px 8px;text-align:center;border-right:1px solid var(--line)}.stat-band div:last-child{border-right:0}.stat-band strong{font-size:23px;display:block;line-height:1.2}.stat-band span{font-size:12px;color:var(--muted)}
.content-section{padding:52px 22px}.section-kicker{color:var(--coral);font-weight:800;font-size:13px;margin:0 0 8px}.content-section h2,.reward-band h2{font-size:29px;line-height:1.3;margin:0 0 18px}.lead{font-size:17px;color:#3e4b43;margin:0 0 32px}.fact-list{border-top:1px solid var(--line)}.fact-list article{display:grid;grid-template-columns:42px 1fr;gap:12px;padding:24px 0;border-bottom:1px solid var(--line)}.fact-list article>span{font-weight:900;color:var(--coral)}.fact-list h3{margin:0 0 5px;font-size:18px}.fact-list p{margin:0;color:var(--muted);font-size:14px}
.action-section{background:#e9f3ec}.flow-list{list-style:none;padding:0;margin:28px 0 30px}.flow-list li{display:grid;grid-template-columns:42px 1fr;gap:14px;margin-bottom:24px}.flow-list b{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:var(--green);color:#fff}.flow-list strong,.flow-list span{display:block}.flow-list span{color:var(--muted);font-size:14px;margin-top:3px}.reward-band{padding:48px 22px;background:var(--green-dark);color:#fff}.reward-band p:not(.section-kicker){color:#cbdcd2}.text-link{display:inline-block;margin-top:18px;border-bottom:1px solid currentColor;font-weight:700}
.site-footer{padding:34px 22px calc(36px + env(safe-area-inset-bottom));background:#101713;color:#fff;display:flex;flex-direction:column;gap:4px}.site-footer span,.site-footer a{font-size:13px;color:#b8c2bc}.site-footer a{margin-top:10px;text-decoration:underline}
.page-head{height:240px;position:relative;color:#fff;overflow:hidden}.page-head img{width:100%;height:100%;object-fit:cover}.page-head:after{content:"";position:absolute;inset:0;background:rgba(7,27,16,.46)}.page-head div{position:absolute;left:22px;bottom:24px;z-index:1}.page-head p{margin:0;font-weight:700}.page-head h1{font-size:36px;margin:0}.prose h2{font-size:22px;margin-top:36px}.prose h2:first-child{margin-top:0}.prose p{white-space:normal;color:#3e4b43}.prose .button{margin-top:30px}
.quiz-shell{min-height:calc(100dvh - 58px);background:#f2f6f3;padding:0 20px 26px;display:flex;flex-direction:column}.quiz-head{height:70px;display:grid;grid-template-columns:60px 1fr 60px;align-items:center}.quiz-head .back-link{font-size:14px;color:var(--muted)}.quiz-head div{grid-column:2;text-align:center}.quiz-head span,.quiz-head strong{display:block}.quiz-head span{font-weight:800}.quiz-head strong{font-size:13px;color:var(--green)}.question-panel{border:0;padding:16px 0 100px;margin:0}.question-panel legend{padding:0;display:block;width:100%;font-size:25px;font-weight:900;line-height:1.45}.question-panel legend>span{display:block;font-size:12px;color:var(--green);margin-bottom:8px}.option-list{margin-top:28px;display:grid;gap:12px}.quiz-option{min-height:66px;padding:12px 16px;display:grid;grid-template-columns:34px 1fr 20px;align-items:center;gap:10px;background:#fff;border:2px solid transparent;border-radius:var(--radius);box-shadow:0 3px 12px rgba(20,34,27,.05)}.quiz-option input{position:absolute;opacity:0}.quiz-option>b{width:30px;height:30px;border:1px solid #b8c5bd;border-radius:50%;display:grid;place-items:center;font-size:14px}.quiz-option span{font-weight:600}.quiz-option i{width:18px;height:18px;border:2px solid #c5d0c9;border-radius:50%}.quiz-option:has(input:checked){border-color:var(--green);background:#ecf7ef}.quiz-option:has(input:checked)>b{background:var(--green);border-color:var(--green);color:#fff}.quiz-option:has(input:checked)>i{border:5px solid var(--green)}.quiz-actions{position:fixed;z-index:10;bottom:0;left:50%;transform:translateX(-50%);width:100%;max-width:720px;padding:12px 20px calc(12px + env(safe-area-inset-bottom));display:grid;grid-template-columns:52px 1fr;gap:10px;background:rgba(247,250,247,.96);border-top:1px solid var(--line)}.icon-button{width:52px;height:48px;border:1px solid var(--line);background:#fff;border-radius:var(--radius);font-size:24px}.quiz-next{background:var(--green);color:#fff}
.result-head{padding:54px 22px 42px;background:var(--green-dark);color:#fff;text-align:center}.result-head.is-failed{background:#343d37}.result-head>span{font-size:13px;font-weight:800}.result-head>strong{display:block;font-size:92px;line-height:1.1;margin:12px 0}.result-head>strong small{font-size:22px}.result-head h1{font-size:26px;line-height:1.35;margin:0 auto 10px;max-width:450px}.result-head p{margin:0;color:#d5e0d9}.result-actions{padding:20px 22px;background:#fff}.review-list{padding-top:36px}.review-list h2{font-size:24px}.review-list details{border-top:1px solid var(--line)}.review-list details:last-child{border-bottom:1px solid var(--line)}.review-list summary{list-style:none;display:grid;grid-template-columns:28px 1fr auto;gap:10px;padding:17px 0;align-items:start;cursor:pointer}.review-list summary::-webkit-details-marker{display:none}.review-list summary>b{color:var(--muted)}.review-list summary>span{font-weight:700}.review-list summary>i{font-style:normal;font-size:12px;padding:2px 7px;border-radius:3px}.review-list .right{background:var(--green-soft);color:var(--green)}.review-list .wrong{background:#fee9e4;color:#a63e2e}.review-list details>div{padding:0 0 20px 38px;color:#526158}.review-list details p{margin:6px 0}.review-list details small{color:var(--muted)}
.form-head{padding:48px 22px 36px;background:var(--green-dark);color:#fff}.form-head p{margin:0 0 8px;color:#c7d9cf;font-size:14px}.form-head h1{font-size:31px;line-height:1.3;margin:0 0 10px}.form-head>span{color:#c7d9cf;font-size:14px}.form-section{padding:30px 22px 52px}.stack-form{display:grid;gap:22px}.stack-form label>span{display:block;font-weight:700;margin-bottom:7px}.stack-form label i{font-style:normal;font-weight:400;color:var(--muted);font-size:12px}.stack-form input:not([type=checkbox]),.stack-form textarea{width:100%;border:1px solid #b8c5bd;border-radius:var(--radius);background:#fff;min-height:50px;padding:12px 14px;color:var(--ink);outline:0}.stack-form textarea{min-height:120px;resize:vertical}.stack-form input:focus,.stack-form textarea:focus{border-color:var(--green);box-shadow:0 0 0 3px rgba(23,107,69,.13)}.check-row{display:grid!important;grid-template-columns:22px 1fr;gap:8px;align-items:start;font-size:13px;color:#526158}.check-row input{width:18px;height:18px;accent-color:var(--green);margin-top:2px}.check-row span{font-weight:400!important;margin:0!important}.check-row a{text-decoration:underline;color:var(--green)}
.success-hero{padding:52px 22px 40px;background:var(--green-dark);color:#fff;text-align:center}.success-symbol{width:54px;height:54px;border-radius:50%;background:#fff;color:var(--green);display:grid;place-items:center;margin:0 auto 14px;font-size:30px;font-weight:900}.success-hero p{margin:0;color:#c9dad0}.success-hero h1{font-size:27px;line-height:1.4}.success-hero>span{font-size:14px;color:#c9dad0}.bind-section{padding:30px 22px;text-align:center;background:#e8f3eb}.bind-section p{margin:0 0 13px}.bind-code{display:block;margin:0 auto 7px;background:#fff;border:2px dashed var(--green);border-radius:var(--radius);padding:12px 20px;color:var(--green-dark);font-size:22px;font-weight:900}.bind-section>span{font-size:12px;color:var(--muted)}.success-actions{display:grid;gap:12px}.success-actions p{text-align:center;font-size:12px;color:var(--muted)}
.mission-head{padding:44px 22px;background:var(--green-dark);color:#fff;text-align:center}.mission-head p{margin:0;color:#c7d9cf}.mission-head>strong{font-size:84px;line-height:1.1;display:block}.mission-head>strong small{font-size:18px}.mission-head>span{display:block}.mission-head>em{display:inline-block;margin-top:17px;padding:7px 12px;background:rgba(255,255,255,.1);border-radius:4px;font-style:normal;font-size:13px}.mission-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;padding:18px 22px;background:#fff}.tier-section h2,.reward-list-section h2,.invite-records h2{font-size:24px}.tier-list article{display:grid;grid-template-columns:40px 1fr auto;gap:12px;align-items:center;padding:18px 0;border-top:1px solid var(--line)}.tier-list article>b{width:36px;height:36px;border-radius:50%;background:#edf1ee;display:grid;place-items:center;color:var(--muted)}.tier-list article.done>b{background:var(--green);color:#fff}.tier-list strong,.tier-list span{display:block}.tier-list span{font-size:13px;color:var(--muted)}.tier-list article>i{font-style:normal;font-size:12px;color:var(--muted)}.tier-list article.done>i{color:var(--green);font-weight:700}.reward-list-section{padding-top:0}.reward-row{display:grid;grid-template-columns:1fr auto;gap:8px;padding:16px 0;border-top:1px solid var(--line)}.reward-row strong,.reward-row span{display:block}.reward-row span{font-size:13px;color:var(--muted)}.reward-row>b{font-size:12px;color:var(--green)}.reward-row>a{grid-column:1/-1;color:var(--coral);font-weight:800}.invite-records{padding-top:0}.invite-records>div{display:grid;grid-template-columns:1fr auto;gap:2px 10px;padding:13px 0;border-top:1px solid var(--line)}.invite-records div span{font-size:12px;color:var(--muted)}.invite-records div b{grid-row:1/3;grid-column:2;align-self:center;font-size:12px;color:var(--green)}.empty-state{padding:28px 0;text-align:center;color:var(--muted)}
.poster-page{padding:34px 22px 52px}.poster-page h1{font-size:29px;margin:0}.poster-page>p{margin:4px 0 22px;color:var(--muted)}.poster-frame{background:#dce7df;padding:10px;margin-bottom:16px}.poster-frame canvas{width:100%;height:auto;display:block;background:#fff}.poster-page>.button{margin-top:10px}
.reward-form-head{background:#2f4738}.error-page{min-height:70dvh;padding:80px 22px;text-align:center}.error-page>b{width:58px;height:58px;border-radius:50%;display:grid;place-items:center;margin:0 auto 18px;background:#fee7e2;color:var(--coral);font-size:30px}.error-page h1{font-size:29px}.error-page p{color:var(--muted);margin-bottom:28px}
@media(min-width:721px){body{box-shadow:0 0 60px rgba(17,36,25,.13)}.hero h1{font-size:52px}.content-section{padding-left:42px;padding-right:42px}.site-header{padding-left:26px;padding-right:26px}.hero-content{left:42px;bottom:48px}.reward-band{padding-left:42px;padding-right:42px}.mission-actions,.form-section,.result-actions{padding-left:42px;padding-right:42px}}
@media(max-width:380px){.hero h1{font-size:38px}.content-section h2,.reward-band h2{font-size:26px}.question-panel legend{font-size:22px}.mission-actions{grid-template-columns:1fr}.button{padding-left:14px;padding-right:14px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button{transition:none}}