:root{
  --bg:#0D0D1A;
  --bg2:#15152A;
  --bg3:#1d1d36;
  --gold:#B99E5A;
  --gold2:#FFCC7D;
  --muted:#C6C6D6;
  --text:#E8E8F0;
  --line:rgba(255,255,255,.08);
  --line2:rgba(255,255,255,.14);
  --radius:24px;
  --radius-sm:16px;
  --maxw:1140px;
  --header-h:66px;
  --shadow:0 18px 50px rgba(0,0,0,.45);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--text);
  background-color:var(--bg);
  background-image:
    radial-gradient(ellipse 1200px 720px at 50% -220px, rgba(185,158,90,.14), transparent 60%),
    radial-gradient(ellipse 900px 620px at 88% 18%, rgba(255,204,125,.06), transparent 55%),
    radial-gradient(ellipse 1000px 720px at 8% 82%, rgba(185,158,90,.05), transparent 55%);
  background-attachment:fixed;
  background-repeat:no-repeat;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}
h1,h2,h3{line-height:1.25;font-weight:700}
.gold{background:linear-gradient(120deg,var(--gold2),var(--gold));-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 24px;border-radius:var(--radius-sm);font-weight:600;font-size:15px;cursor:pointer;border:1px solid transparent;transition:transform .2s ease, box-shadow .2s ease, background .2s ease}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:linear-gradient(135deg,var(--gold),var(--gold2));color:#1a1407;box-shadow:0 10px 28px rgba(185,158,90,.32)}
.btn-ghost{border-color:var(--line2);color:var(--text);background:rgba(255,255,255,.03)}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold2)}
.btn-lg{padding:15px 30px;font-size:16px}

/* ---------- header / nav ---------- */
.site-header{position:fixed;top:0;left:0;right:0;z-index:50;height:var(--header-h);display:flex;align-items:center;transition:background .3s ease, border-color .3s ease, backdrop-filter .3s ease;border-bottom:1px solid transparent}
.site-header.scrolled{background:rgba(13,13,26,.72);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;width:100%}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:19px;letter-spacing:.3px}
.brand img{height:30px;width:auto}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{padding:8px 14px;border-radius:10px;color:var(--muted);font-size:15px;transition:color .2s, background .2s}
.nav-links a:hover{color:var(--text);background:rgba(255,255,255,.05)}
.nav-links a.active{color:var(--gold2)}
.nav-cta{display:flex;align-items:center;gap:12px;margin-left:8px}
.hamburger{display:none;background:none;border:1px solid var(--line2);border-radius:10px;width:42px;height:42px;color:var(--text);font-size:22px;cursor:pointer}

/* ---------- hero ---------- */
.hero{padding:calc(var(--header-h) + 64px) 0 56px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero h1{font-size:clamp(34px,5vw,56px);margin-bottom:18px}
.hero p.lead{font-size:clamp(16px,2vw,19px);color:var(--muted);max-width:520px;margin-bottom:28px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border:1px solid var(--line2);border-radius:999px;font-size:13px;color:var(--muted);margin-bottom:22px}
.hero-badge i{color:var(--gold2)}

/* featured char card */
.feature-card{position:relative;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line2);max-width:360px;margin:0 auto}
.feature-card .fc-img{width:100%;height:600px;object-fit:cover}
.feature-card .fc-overlay{position:absolute;inset:auto 0 0 0;padding:22px;background:linear-gradient(180deg,transparent,rgba(8,8,18,.92))}
.feature-card .fc-name{font-size:22px;font-weight:700}
.feature-card .fc-scene{color:var(--gold2);font-size:14px;margin:2px 0 12px}
.feature-card .fc-cta{width:100%}

/* ---------- sections ---------- */
section{padding:56px 0;scroll-margin-top:calc(var(--header-h) + 12px)}
.section-head{text-align:center;max-width:680px;margin:0 auto 38px}
.section-head .eyebrow{color:var(--gold);font-size:13px;letter-spacing:2px;text-transform:uppercase;font-weight:600}
.section-head h2{font-size:clamp(26px,3.4vw,38px);margin:10px 0 12px}
.section-head p{color:var(--muted)}

/* tag chips */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:40px}
.chip{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border:1px solid var(--line2);border-radius:999px;font-size:14px;color:var(--muted);background:rgba(255,255,255,.03);transition:all .2s}
.chip:hover{border-color:var(--gold);color:var(--gold2);transform:translateY(-2px)}
.chip.active{background:linear-gradient(135deg,var(--gold),var(--gold2));color:#1a1407;border-color:transparent}

/* character grid — 2 rows x 4 */
.char-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.char-card{background:var(--bg2);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .25s ease, border-color .25s ease, box-shadow .25s ease;display:flex;flex-direction:column}
.char-card:hover{transform:translateY(-6px);border-color:var(--line2);box-shadow:var(--shadow)}
.char-card .cc-img{width:100%;height:300px;object-fit:cover;flex:none}
.char-card .cc-body{padding:16px 16px 18px;display:flex;flex-direction:column;gap:8px;flex:1}
.cc-name{font-size:17px;font-weight:700}
.cc-scene{color:var(--gold2);font-size:13.5px;margin-top:-4px}
.cc-intro{color:var(--muted);font-size:13.5px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:40px}
.cc-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:auto}
.cc-tag{font-size:12px;padding:3px 10px;border:1px solid var(--line2);border-radius:999px;color:var(--muted)}

/* character card hover CTA - "开始聊天" slides up on mouseover */
.char-card .cc-media{position:relative;overflow:hidden;flex:none;}
.char-card .cc-media::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:52%;
  background:linear-gradient(180deg,transparent,rgba(8,8,18,.88));
  opacity:0;
  transition:opacity .28s ease;
  pointer-events:none;
  z-index:1;
}
.char-card:hover .cc-media::after{opacity:1}
.char-card .cc-cta{
  position:absolute;
  left:12px;
  right:12px;
  bottom:12px;
  padding:12px 16px;
  background:linear-gradient(135deg,var(--gold),var(--gold2));
  color:#1a1407;
  border-radius:var(--radius-sm);
  text-align:center;
  font-weight:600;
  font-size:14px;
  transform:translateY(140%);
  opacity:0;
  transition:transform .34s cubic-bezier(.2,.8,.2,1),opacity .28s ease;
  z-index:2;
}
.char-card:hover .cc-cta{transform:translateY(0);opacity:1}
.char-card .cc-cta:hover{box-shadow:0 8px 24px rgba(185,158,90,.45);transform:translateY(0)}

/* feature grid */
.feat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:22px}
.feat-card{background:var(--bg2);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:border-color .2s, transform .2s}
.feat-card:hover{border-color:var(--line2);transform:translateY(-4px)}
.feat-card .ic{width:48px;height:48px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,rgba(185,158,90,.25),rgba(255,204,125,.12));color:var(--gold2);font-size:24px;margin-bottom:16px}
.feat-card h3{font-size:18px;margin-bottom:8px}
.feat-card p{color:var(--muted);font-size:14.5px}

/* FAQ */
.faq{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq details{background:var(--bg2);border:1px solid var(--line);border-radius:var(--radius-sm);padding:4px 22px;transition:border-color .2s}
.faq details[open]{border-color:var(--line2)}
.faq summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:16px 0;font-weight:600;font-size:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary i{color:var(--gold2);transition:transform .25s;flex-shrink:0}
.faq details[open] summary i{transform:rotate(180deg)}
.faq .answer{padding:0 0 18px;color:var(--muted);font-size:15px}

/* steps (guide) */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:22px;counter-reset:step}
.step{background:var(--bg2);border:1px solid var(--line);border-radius:var(--radius);padding:26px;position:relative}
.step .num{font-size:30px;font-weight:800;background:linear-gradient(120deg,var(--gold2),var(--gold));-webkit-background-clip:text;background-clip:text;color:transparent}
.step h3{font-size:17px;margin:8px 0}
.step p{color:var(--muted);font-size:14.5px}

/* prose (legal / about) */
.prose{max-width:860px;margin:0 auto}
.prose h2{font-size:24px;margin:34px 0 12px;color:var(--gold2)}
.prose h3{font-size:18px;margin:22px 0 8px}
.prose p,.prose li{color:var(--muted);font-size:15.5px;margin-bottom:10px}
.prose ul{padding-left:22px}
.prose a{color:var(--gold2);text-decoration:underline}

/* download */
.dl-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.dl-badges{display:flex;flex-direction:column;gap:14px;max-width:320px}
.dl-badge{display:flex;align-items:center;gap:14px;padding:16px 20px;border:1px solid var(--line2);border-radius:var(--radius-sm);background:var(--bg2);transition:border-color .2s, transform .2s}
.dl-badge:hover{border-color:var(--gold);transform:translateY(-3px)}
.dl-badge i{font-size:30px;color:var(--gold2)}
.dl-badge .t{font-size:13px;color:var(--muted)}
.dl-badge .s{font-size:17px;font-weight:700}
.dl-qr{width:200px;height:200px;border-radius:20px;background:linear-gradient(135deg,rgba(185,158,90,.2),rgba(255,204,125,.1));border:1px solid var(--line2);display:grid;place-items:center;color:var(--muted);font-size:14px;margin-top:18px}
.dl-qr-tip{text-align:center;color:var(--muted);font-size:13px;margin-top:10px;letter-spacing:.3px}
.stat-row{display:flex;gap:36px;flex-wrap:wrap;justify-content:center;margin-top:18px;margin-bottom:44px}
.stat .n{font-size:30px;font-weight:800;background:linear-gradient(120deg,var(--gold2),var(--gold));-webkit-background-clip:text;background-clip:text;color:transparent}
.stat .l{color:var(--muted);font-size:13.5px}
/* download: 2 badges side by side, features moved below */
.dl-head{display:flex;align-items:center;gap:30px;flex-wrap:wrap;justify-content:center;margin-bottom:28px}
.dl-row{display:flex;flex-direction:row;flex-wrap:wrap;gap:14px;max-width:520px}
.dl-row .dl-badge{flex:1 1 200px}

/* homepage download section */
.download-sec{background:linear-gradient(180deg,rgba(185,158,90,.05),transparent 70%)}
.dl-inner{display:grid;grid-template-columns:0.9fr 1.1fr;gap:48px;align-items:center;max-width:980px;margin:0 auto}
.dl-inner .dl-badges{max-width:330px}
.dl-inner .dl-qr{margin:18px auto 0}
.changelog h3{font-size:20px;margin-bottom:18px;color:var(--gold2)}
.log-list{list-style:none;display:flex;flex-direction:column;gap:14px}
.log-list li{background:var(--bg2);border:1px solid var(--line);border-radius:var(--radius-sm);padding:16px 18px;display:flex;flex-wrap:wrap;align-items:center;gap:10px;transition:border-color .2s}
.log-list li:hover{border-color:var(--line2)}
.log-list .ver{font-weight:700;color:var(--gold2);font-size:13px;background:rgba(255,204,125,.12);padding:3px 11px;border-radius:999px}
.log-list .date{color:var(--muted);font-size:12.5px;margin-left:auto}
.log-list p{flex-basis:100%;color:var(--muted);font-size:14px;margin:4px 0 0;line-height:1.7}

/* about */
.about-hero{text-align:center;max-width:760px;margin:0 auto}
.about-hero h1{font-size:clamp(30px,4.5vw,48px);margin-bottom:16px}
.about-hero p{color:var(--muted);font-size:17px}
.team{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:22px;margin-top:20px}
.member{background:var(--bg2);border:1px solid var(--line);border-radius:var(--radius);padding:24px;text-align:center}
.member .av{width:72px;height:72px;border-radius:50%;margin:0 auto 14px;background:linear-gradient(135deg,var(--gold),var(--gold2));display:grid;place-items:center;font-size:28px;color:#1a1407;font-weight:800}
.member h3{font-size:17px}
.member p{color:var(--muted);font-size:14px;margin-top:4px}

/* footer */
.site-footer{border-top:1px solid var(--line);padding:54px 0 30px;margin-top:40px;background:rgba(8,8,18,.5)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
.footer-grid h4{font-size:15px;margin-bottom:14px;color:var(--text)}
.footer-grid a{display:block;color:var(--muted);font-size:14px;padding:5px 0;transition:color .2s}
.footer-grid a:hover{color:var(--gold2)}
.footer-brand p{color:var(--muted);font-size:14px;margin:14px 0;max-width:300px}
.socials{display:flex;gap:10px}
.socials a{width:38px;height:38px;border:1px solid var(--line2);border-radius:10px;display:grid;place-items:center;color:var(--muted);font-size:18px;transition:all .2s}
.socials a:hover{border-color:var(--gold);color:var(--gold2);transform:translateY(-2px)}
.footer-bottom{border-top:1px solid var(--line);margin-top:34px;padding-top:20px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;color:var(--muted);font-size:13px}
.footer-bottom a{color:var(--muted);text-decoration:underline}

/* 404 */
.err{text-align:center;padding:140px 0}
.err .code{font-size:96px;font-weight:800;background:linear-gradient(120deg,var(--gold2),var(--gold));-webkit-background-clip:text;background-clip:text;color:transparent}
.err h1{font-size:30px;margin:6px 0 12px}
.err p{color:var(--muted);margin-bottom:24px}

/* user reviews / testimonials */
.reviews-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:22px}
.review-card{background:var(--bg2);border:1px solid var(--line);border-radius:var(--radius);padding:24px 24px 22px;transition:border-color .2s, transform .2s}
.review-card:hover{border-color:var(--line2);transform:translateY(-4px)}
.review-card .stars{color:var(--gold2);font-size:15px;letter-spacing:2px;margin-bottom:12px}
.review-card .text{color:var(--text);font-size:14.5px;line-height:1.75}
.review-card .who{display:flex;align-items:center;gap:12px;margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}
.review-card .av{width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,var(--gold),var(--gold2));color:#1a1407;font-weight:800;font-size:17px;display:grid;place-items:center;flex-shrink:0}
.review-card .name{font-size:14.5px;font-weight:600}
.review-card .meta{font-size:12.5px;color:var(--muted)}

/* fade-up (progressive enhancement) */
.fade-up{opacity:1}
html.js .fade-up{opacity:0;transform:translateY(24px);transition:opacity .7s ease, transform .7s ease}
html.js .fade-up.visible{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .feature-card{max-width:420px}
  .dl-grid{grid-template-columns:1fr;gap:30px}
  .dl-inner{grid-template-columns:1fr;gap:30px}
  .dl-inner .dl-badges{max-width:none}
  .footer-grid{grid-template-columns:1fr 1fr}
  .char-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .reviews-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  .hamburger{display:grid;place-items:center}
  .nav-links{position:fixed;top:var(--header-h);left:0;right:0;background:rgba(13,13,26,.97);backdrop-filter:blur(14px);flex-direction:column;align-items:stretch;gap:0;padding:12px 20px 22px;border-bottom:1px solid var(--line);display:none}
  .nav-links.open{display:flex}
  .nav-links a{padding:14px 8px;border-bottom:1px solid var(--line)}
  .nav-cta .btn-ghost{display:none}
  .nav-cta{gap:8px}
  .nav-cta .btn{padding:9px 14px;font-size:14px}
  .brand{font-size:17px}
  .footer-grid{grid-template-columns:1fr}
  section{padding:44px 0}
  .char-grid{grid-template-columns:repeat(2,1fr)}
  .reviews-grid{grid-template-columns:1fr}
}