:root{
  --cream:#fff7e9;
  --cream-2:#fffdf8;
  --navy:#14213d;
  --navy-2:#24365f;
  --orange:#ff8a3d;
  --orange-2:#ffb067;
  --purple:#a78bfa;
  --purple-2:#e9ddff;
  --ink:#1f2937;
  --muted:#64748b;
  --line:rgba(20,33,61,.12);
  --card:#ffffff;
  --shadow:0 20px 50px rgba(20,33,61,.12);
  --radius:26px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:linear-gradient(180deg,var(--cream),#fff 42%,#f6f4ff);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.72}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input,textarea{font:inherit}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,247,233,.92);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}
.top-strip{display:flex;align-items:center;justify-content:center;gap:12px;min-height:38px;padding:6px 16px;color:var(--navy);font-size:14px;background:linear-gradient(90deg,rgba(167,139,250,.16),rgba(255,138,61,.18))}
.pill-dot{width:9px;height:9px;border-radius:50%;background:var(--orange);box-shadow:0 0 0 6px rgba(255,138,61,.16)}
.host-chip{padding:3px 10px;border-radius:999px;background:rgba(255,255,255,.72);border:1px solid var(--line)}
.main-nav{max-width:1180px;margin:0 auto;padding:16px 22px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:900;color:var(--navy);letter-spacing:.02em}
.brand-mark{display:inline-grid;place-items:center;width:42px;height:42px;border-radius:15px;background:linear-gradient(135deg,var(--navy),var(--purple));color:#fff;box-shadow:0 10px 24px rgba(36,54,95,.24)}
.nav-links{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.nav-links a{padding:10px 14px;border-radius:999px;color:var(--navy);font-weight:700;font-size:15px}
.nav-links a:hover,.nav-links a.active{background:var(--navy);color:#fff}
.nav-toggle{display:none;border:0;background:var(--navy);color:#fff;border-radius:999px;padding:9px 14px;font-weight:800}
main{overflow:hidden}
.container{max-width:1180px;margin:0 auto;padding:0 22px}
.hero{position:relative;padding:76px 0 44px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:42px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 13px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--navy);font-weight:800;box-shadow:0 8px 26px rgba(20,33,61,.08)}
h1{font-size:clamp(38px,6vw,76px);line-height:1.02;margin:22px 0 18px;color:var(--navy);letter-spacing:-.06em}
.hero p.lead{font-size:18px;color:#3a4864;max-width:690px;margin:0 0 26px}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin:26px 0}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:12px 18px;border-radius:16px;font-weight:900;border:1px solid transparent;cursor:pointer;transition:.2s ease}
.btn.primary{background:var(--orange);color:#fff;box-shadow:0 16px 28px rgba(255,138,61,.28)}
.btn.secondary{background:#fff;color:var(--navy);border-color:var(--line)}
.btn:hover{transform:translateY(-2px)}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:30px}
.stat{padding:18px;border-radius:22px;background:rgba(255,255,255,.78);border:1px solid var(--line);box-shadow:0 14px 34px rgba(20,33,61,.08)}
.stat strong{display:block;color:var(--navy);font-size:24px}.stat span{color:var(--muted);font-size:13px}
.hero-card{position:relative;border-radius:34px;background:linear-gradient(145deg,#fff,#f0e8ff);border:1px solid var(--line);box-shadow:var(--shadow);padding:22px;overflow:hidden}
.hero-card:before{content:"";position:absolute;inset:auto -50px -80px auto;width:190px;height:190px;border-radius:50%;background:rgba(255,138,61,.2)}
.floating-note{position:absolute;right:16px;top:18px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:12px 14px;color:var(--navy);font-weight:800;box-shadow:0 12px 28px rgba(20,33,61,.1)}
.section{padding:48px 0}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:22px}
.section-kicker{color:var(--orange);font-weight:900;letter-spacing:.08em}
h2{font-size:clamp(28px,4vw,46px);line-height:1.12;margin:8px 0;color:var(--navy);letter-spacing:-.04em}.section-head p{margin:0;color:var(--muted);max-width:560px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.card{background:rgba(255,255,255,.86);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:0 16px 42px rgba(20,33,61,.08);position:relative;overflow:hidden}
.card.soft{background:linear-gradient(145deg,#fff,#fff6ed)}
.card.purple{background:linear-gradient(145deg,#fff,#f1ebff)}
.card h3{margin:10px 0 8px;color:var(--navy);font-size:22px}.card p{color:#4b5d78;margin:0 0 14px}.card small{color:var(--muted)}
.tags{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}.tag{display:inline-flex;align-items:center;padding:5px 9px;border-radius:999px;background:rgba(167,139,250,.17);color:var(--navy);font-size:13px;font-weight:800}.tag.orange{background:rgba(255,138,61,.17)}
.card-actions{display:flex;align-items:center;gap:9px;flex-wrap:wrap;margin-top:14px}.mini-btn{border:1px solid var(--line);background:#fff;border-radius:999px;padding:7px 11px;color:var(--navy);font-weight:800;font-size:13px}.mini-btn.filled{background:var(--navy);color:#fff}.mock-label{font-size:12px;color:var(--muted);font-weight:700}
.playlist-cover{min-height:190px;border-radius:22px;background:#f5efff;margin-bottom:16px;overflow:hidden;display:grid;place-items:center;border:1px solid var(--line)}
.topic-row{display:flex;align-items:flex-start;gap:14px;padding:16px;border-radius:22px;background:#fff;border:1px solid var(--line);margin-bottom:12px}.topic-rank{display:grid;place-items:center;width:34px;height:34px;border-radius:12px;background:var(--navy);color:#fff;font-weight:900;flex:0 0 auto}.topic-row h3{font-size:18px;margin:0;color:var(--navy)}.topic-row p{margin:4px 0 0;color:var(--muted)}
.rating-line{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 0;border-bottom:1px dashed var(--line)}.rating-line:last-child{border-bottom:0}.stars{letter-spacing:2px;color:#ff9f1c;font-weight:900}.score{color:var(--navy);font-weight:900}
.circle-card{text-align:center}.circle-icon{width:70px;height:70px;margin:0 auto 12px;border-radius:24px;display:grid;place-items:center;background:linear-gradient(135deg,var(--purple),var(--orange-2));color:#fff;font-size:28px;font-weight:900}
.challenge{display:grid;grid-template-columns:.85fr 1.15fr;gap:22px;align-items:center}.challenge-list{display:grid;gap:12px}.check-item{display:flex;gap:12px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:18px;padding:13px}.check{width:24px;height:24px;border-radius:9px;background:var(--orange);color:#fff;display:grid;place-items:center;font-weight:900;flex:0 0 auto}
.comment{display:flex;gap:13px}.avatar{width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,var(--navy),var(--purple));display:grid;place-items:center;color:#fff;font-weight:900;flex:0 0 auto}.bubble{background:#fff;border:1px solid var(--line);border-radius:22px;padding:14px 16px;position:relative}.bubble:before{content:"";position:absolute;left:-7px;top:18px;width:12px;height:12px;transform:rotate(45deg);background:#fff;border-left:1px solid var(--line);border-bottom:1px solid var(--line)}
.feed{display:grid;gap:14px}.feed-item{display:grid;grid-template-columns:auto 1fr;gap:13px;padding:16px;border-radius:24px;background:#fff;border:1px solid var(--line)}.feed-meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap;color:var(--muted);font-size:13px}.interaction{display:flex;gap:10px;flex-wrap:wrap;margin-top:10px;color:var(--navy);font-weight:800;font-size:13px}
.banner{padding:34px;border-radius:32px;background:linear-gradient(135deg,var(--navy),#312e81);color:#fff;display:flex;align-items:center;justify-content:space-between;gap:20px;box-shadow:var(--shadow)}.banner h2{color:#fff;margin:0 0 8px}.banner p{margin:0;color:rgba(255,255,255,.82)}
.faq{display:grid;gap:12px}.faq details{background:#fff;border:1px solid var(--line);border-radius:20px;padding:16px 18px}.faq summary{cursor:pointer;color:var(--navy);font-weight:900}.faq p{color:#53647f;margin:10px 0 0}
.page-hero{padding:58px 0 20px}.page-hero .card{display:grid;grid-template-columns:1fr 280px;gap:24px;align-items:center}.page-hero h1{font-size:clamp(34px,5vw,60px)}
.steps{counter-reset:step;display:grid;gap:14px}.step{counter-increment:step;display:flex;gap:14px;background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px}.step:before{content:counter(step);display:grid;place-items:center;width:36px;height:36px;border-radius:14px;background:var(--orange);color:#fff;font-weight:900;flex:0 0 auto}
.table-like{display:grid;gap:10px}.table-row{display:grid;grid-template-columns:1fr 1fr 1fr;gap:10px;padding:14px;border-radius:18px;background:#fff;border:1px solid var(--line)}.table-row strong{color:var(--navy)}
.notice{padding:16px 18px;border-radius:22px;background:rgba(255,138,61,.12);border:1px solid rgba(255,138,61,.24);color:#6b3c18;font-weight:700}
.form-card label{display:block;font-weight:900;color:var(--navy);margin:10px 0 6px}.form-card input,.form-card textarea{width:100%;border:1px solid var(--line);border-radius:16px;background:#fff;padding:12px 14px;color:var(--ink)}.form-card textarea{min-height:120px;resize:vertical}.form-card button{margin-top:14px}
.site-footer{margin-top:56px;background:var(--navy);color:#fff;padding:42px 0}.footer-grid{max-width:1180px;margin:0 auto;padding:0 22px;display:grid;grid-template-columns:1.2fr .75fr 1fr;gap:28px}.footer-grid p{color:rgba(255,255,255,.76);margin:10px 0}.footer-grid h3{margin:0 0 12px}.footer-grid a:not(.brand){display:block;color:rgba(255,255,255,.78);margin:6px 0}.footer-brand{color:#fff}.update-time{font-weight:900}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media (max-width:900px){.hero-grid,.challenge,.page-hero .card{grid-template-columns:1fr}.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1fr}.section-head{display:block}.banner{display:block}.table-row{grid-template-columns:1fr}.hero-card{order:-1}}
@media (max-width:720px){.top-strip{justify-content:flex-start;overflow:auto}.main-nav{align-items:flex-start}.nav-toggle{display:inline-flex}.nav-links{display:none;position:absolute;left:16px;right:16px;top:92px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow)}.nav-links.open{display:grid}.nav-links a{display:block}.hero{padding-top:42px}.hero-stats,.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}.container{padding:0 16px}.card,.banner{border-radius:22px}h1{letter-spacing:-.04em}.section{padding:34px 0}}