:root{
  --cream:#fff8ec;
  --cream-2:#fffdf7;
  --navy:#102542;
  --navy-2:#17365f;
  --orange:#ff8a3d;
  --orange-soft:#ffe2cd;
  --purple:#b9a7ff;
  --purple-soft:#eee8ff;
  --text:#27364a;
  --muted:#68758a;
  --line:rgba(16,37,66,.12);
  --card:#ffffff;
  --shadow:0 20px 55px rgba(16,37,66,.11);
  --radius:28px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
  color:var(--text);
  background:
    radial-gradient(circle at 8% 0%, rgba(255,138,61,.18), transparent 32rem),
    radial-gradient(circle at 90% 8%, rgba(185,167,255,.22), transparent 28rem),
    linear-gradient(180deg,var(--cream),var(--cream-2) 28rem,#fff);
  line-height:1.75;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(1180px,92vw);margin:0 auto}
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,248,236,.86);
  backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.header-wrap{height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:12px;font-weight:900;color:var(--navy)}
.brand-mark{
  width:42px;height:42px;border-radius:14px;display:grid;place-items:center;
  color:#fff;background:linear-gradient(135deg,var(--navy),var(--purple));
  box-shadow:0 12px 28px rgba(16,37,66,.22);
}
.brand-text{font-size:20px;letter-spacing:.04em}
.site-nav{display:flex;align-items:center;gap:6px;flex-wrap:wrap;justify-content:flex-end}
.site-nav a{padding:9px 12px;border-radius:999px;color:var(--navy);font-weight:700;font-size:14px}
.site-nav a:hover,.site-nav a.active{background:var(--navy);color:#fff}
.nav-toggle{display:none;border:0;background:var(--navy);border-radius:14px;width:42px;height:42px;padding:10px;cursor:pointer}
.nav-toggle span{display:block;height:2px;background:#fff;margin:5px 0;border-radius:2px}
.hero{padding:72px 0 42px}
.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:44px;align-items:center}
.eyebrow{display:inline-flex;gap:8px;align-items:center;padding:8px 14px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.68);font-weight:800;color:var(--navy);font-size:14px}
.eyebrow:before{content:"";width:10px;height:10px;border-radius:50%;background:var(--orange);box-shadow:0 0 0 5px var(--orange-soft)}
h1,.h1{font-size:clamp(38px,6vw,72px);line-height:1.08;margin:18px 0 20px;color:var(--navy);letter-spacing:-.04em}
h2{font-size:clamp(28px,4vw,44px);line-height:1.18;margin:0 0 16px;color:var(--navy);letter-spacing:-.025em}
h3{font-size:22px;line-height:1.35;margin:0 0 10px;color:var(--navy)}
p{margin:0 0 14px}.lead{font-size:18px;color:#43516a;max-width:660px}.muted{color:var(--muted)}
.hero-actions,.section-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:12px 20px;border-radius:999px;
  border:1px solid transparent;font-weight:900;cursor:pointer;transition:.2s ease;
}
.btn-primary{background:var(--orange);color:#fff;box-shadow:0 12px 30px rgba(255,138,61,.28)}
.btn-secondary{background:#fff;color:var(--navy);border-color:var(--line)}
.btn:hover{transform:translateY(-2px)}
.hero-card{background:rgba(255,255,255,.74);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.hero-card img{border-radius:22px;background:var(--purple-soft)}
.stats-row{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:22px}.stat{
  background:#fff;border:1px solid var(--line);border-radius:22px;padding:16px;text-align:center
}.stat strong{display:block;font-size:26px;color:var(--navy)}.stat span{font-size:13px;color:var(--muted)}
.section{padding:58px 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:28px;margin-bottom:28px}.section-head p{max-width:620px;color:var(--muted)}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 14px 36px rgba(16,37,66,.08)}
.card.compact{padding:18px}.card img.card-img{width:100%;border-radius:22px;margin-bottom:16px;background:var(--cream)}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}.tag{display:inline-flex;align-items:center;border-radius:999px;background:var(--purple-soft);color:var(--navy);padding:5px 10px;font-weight:800;font-size:12px}.tag.orange{background:var(--orange-soft)}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px;color:var(--muted);font-size:13px;margin-top:14px}.meta-row span{display:inline-flex;align-items:center;gap:5px}.pill{border:1px solid var(--line);border-radius:999px;padding:6px 10px;background:#fff}
.collect-btn{width:100%;border:0;background:var(--navy);color:#fff;border-radius:18px;padding:12px;font-weight:900;margin-top:16px;cursor:pointer}.collect-btn.is-saved{background:var(--orange)}
.topic-card{display:flex;gap:16px;align-items:flex-start}.topic-icon{width:54px;height:54px;flex:0 0 54px;border-radius:18px;background:var(--orange-soft);display:grid;place-items:center;color:var(--orange);font-weight:900;font-size:24px}.topic-card:nth-child(even) .topic-icon{background:var(--purple-soft);color:var(--navy)}
.rating-stars{color:#ff9b2f;letter-spacing:2px;font-size:20px}.score{font-size:42px;color:var(--navy);font-weight:950;line-height:1}.score small{font-size:16px;color:var(--muted)}
.bubble{position:relative;background:#fff;border:1px solid var(--line);border-radius:24px;padding:18px;box-shadow:0 12px 30px rgba(16,37,66,.07)}.bubble:after{content:"";position:absolute;left:28px;bottom:-10px;width:18px;height:18px;background:#fff;border-right:1px solid var(--line);border-bottom:1px solid var(--line);transform:rotate(45deg)}
.user-line{display:flex;align-items:center;gap:12px;margin-top:18px}.avatar{width:44px;height:44px;border-radius:50%;background:var(--purple-soft);border:2px solid #fff;box-shadow:0 8px 20px rgba(16,37,66,.12)}
.feed{display:grid;gap:16px}.feed-item{display:grid;grid-template-columns:auto 1fr;gap:14px;background:#fff;border:1px solid var(--line);border-radius:24px;padding:18px}.feed-body p{margin-bottom:8px}.feed-actions{display:flex;flex-wrap:wrap;gap:10px;color:var(--muted);font-size:13px}
.challenge{display:grid;grid-template-columns:.85fr 1.15fr;gap:22px;align-items:center;background:linear-gradient(135deg,var(--navy),#254d82);color:#fff;border-radius:34px;padding:28px;overflow:hidden}.challenge h2,.challenge h3{color:#fff}.challenge p{color:rgba(255,255,255,.82)}.challenge img{border-radius:24px}.challenge .tag{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.2)}
.notice{border-left:4px solid var(--orange);background:#fff7ef;border-radius:18px;padding:16px;color:#58402d}.notice strong{color:var(--navy)}
.page-hero{padding:58px 0 28px}.page-hero .lead{max-width:820px}.breadcrumb{font-size:14px;color:var(--muted);margin-bottom:12px}.breadcrumb a{font-weight:800;color:var(--navy)}
.timeline{display:grid;gap:18px;position:relative}.timeline-item{display:grid;grid-template-columns:120px 1fr;gap:18px}.timeline-label{font-weight:900;color:var(--orange)}.timeline-content{background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px}
.table-like{display:grid;gap:12px}.rank-row{display:grid;grid-template-columns:54px 1fr auto;gap:12px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:20px;padding:14px}.rank-num{font-weight:950;color:var(--orange);font-size:22px}.rank-score{font-weight:950;color:var(--navy)}
.video-thumb{position:relative;border-radius:22px;overflow:hidden;background:var(--purple-soft);margin-bottom:16px}.video-thumb img{width:100%}.play-dot{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:58px;height:58px;border-radius:50%;display:grid;place-items:center;background:rgba(255,255,255,.88);color:var(--orange);font-size:25px;font-weight:900;box-shadow:0 12px 30px rgba(16,37,66,.18)}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.field{display:grid;gap:8px}.field.full{grid-column:1/-1}.field label{font-weight:900;color:var(--navy)}.field input,.field textarea,.field select{width:100%;border:1px solid var(--line);border-radius:16px;padding:12px 14px;font:inherit;background:#fffdf8;color:var(--text)}.field textarea{min-height:126px;resize:vertical}.form-card button{border:0}
.domain-box{display:flex;align-items:center;justify-content:space-between;gap:16px;border:1px dashed rgba(16,37,66,.28);background:#fff;border-radius:24px;padding:18px;margin-top:16px}.domain-box strong{color:var(--navy);word-break:break-all}
.faq{display:grid;gap:14px}.faq details{background:#fff;border:1px solid var(--line);border-radius:20px;padding:16px}.faq summary{font-weight:950;color:var(--navy);cursor:pointer}.faq p{margin-top:10px;color:var(--muted)}
.site-footer{margin-top:56px;padding:38px 0 22px;background:var(--navy);color:#fff}.footer-grid{display:grid;grid-template-columns:1.2fr .9fr 1fr;gap:24px}.site-footer p{color:rgba(255,255,255,.72);margin-top:8px}.footer-label{font-weight:900;color:var(--orange)}.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:26px;padding-top:18px;display:flex;justify-content:space-between;gap:18px;color:rgba(255,255,255,.68);font-size:14px;flex-wrap:wrap}
.reveal{opacity:0;transform:translateY(18px);transition:.6s ease}.reveal.is-visible{opacity:1;transform:none}
@media (max-width:940px){.hero-grid,.grid-3,.grid-4,.grid-2,.challenge,.footer-grid{grid-template-columns:1fr}.section-head{display:block}.site-nav{position:absolute;left:4vw;right:4vw;top:68px;display:none;background:#fff;border:1px solid var(--line);border-radius:22px;padding:12px;box-shadow:var(--shadow)}.site-nav.is-open{display:grid;grid-template-columns:1fr 1fr}.nav-toggle{display:block}.header-wrap{height:68px}.stats-row{grid-template-columns:1fr 1fr 1fr}.timeline-item{grid-template-columns:1fr}.form-grid{grid-template-columns:1fr}.domain-box{display:block}}
@media (max-width:560px){.hero{padding-top:42px}.stats-row{grid-template-columns:1fr}.site-nav.is-open{grid-template-columns:1fr}.card{padding:18px}.challenge{padding:20px;border-radius:26px}h1,.h1{font-size:38px}.rank-row{grid-template-columns:40px 1fr}.rank-score{grid-column:2}.footer-bottom{display:grid}}