:root{
    --cream:#fff8ec;
    --cream-2:#fff1d8;
    --ink:#17213b;
    --ink-2:#24335c;
    --orange:#ff8a3d;
    --orange-dark:#e66f24;
    --purple:#bfa7ff;
    --purple-2:#eee7ff;
    --blue:#24406f;
    --blue-soft:#e8eefc;
    --muted:#68728c;
    --card:#ffffff;
    --line:rgba(23,33,59,.12);
    --shadow:0 18px 50px rgba(36,64,111,.13);
    --radius:24px;
}
*{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(--ink);
    background:
        radial-gradient(circle at top left, rgba(255,138,61,.2), transparent 35rem),
        radial-gradient(circle at 85% 0, rgba(191,167,255,.26), transparent 32rem),
        var(--cream);
    line-height:1.72;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input,textarea{font:inherit}
.container{width:min(1180px, calc(100% - 36px));margin:0 auto}
.site-header{
    position:sticky;top:0;z-index:50;
    backdrop-filter:blur(16px);
    background:rgba(255,248,236,.86);
    border-bottom:1px solid var(--line);
}
.header-wrap{height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:inline-flex;align-items:center;gap:12px;font-weight:900;letter-spacing:.02em}
.brand-mark{display:grid;place-items:center;width:42px;height:42px;border-radius:15px;background:linear-gradient(135deg,var(--orange),#ffb56f);color:#fff;box-shadow:0 10px 24px rgba(255,138,61,.32)}
.brand-text{font-size:22px;color:var(--ink)}
.main-nav{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.main-nav a{padding:9px 13px;border-radius:999px;color:var(--ink-2);font-weight:700;font-size:15px}
.main-nav a:hover,.main-nav a.active{background:var(--ink);color:#fff}
.nav-toggle{display:none;border:0;background:var(--ink);color:#fff;border-radius:999px;padding:9px 14px;font-weight:800}
.hero{padding:72px 0 46px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:40px}
.kicker{display:inline-flex;align-items:center;gap:8px;padding:7px 13px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.68);font-size:14px;font-weight:800;color:var(--orange-dark)}
.kicker:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--orange)}
h1{font-size:clamp(38px,6vw,68px);line-height:1.08;margin:18px 0;color:var(--ink);letter-spacing:-.04em}
h2{font-size:clamp(28px,4vw,44px);line-height:1.18;margin:0 0 12px;letter-spacing:-.03em}
h3{font-size:22px;line-height:1.25;margin:0 0 10px}
p{margin:0 0 14px}.lead{font-size:19px;color:var(--ink-2);max-width:720px}.muted{color:var(--muted)}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 20px;border-radius:999px;font-weight:900;border:1px solid transparent;cursor:pointer}.btn-primary{background:var(--ink);color:#fff;box-shadow:0 16px 28px rgba(23,33,59,.18)}.btn-secondary{background:#fff;color:var(--ink);border-color:var(--line)}.btn-soft{background:var(--purple-2);color:var(--blue)}
.hero-card{background:rgba(255,255,255,.82);border:1px solid var(--line);border-radius:32px;padding:20px;box-shadow:var(--shadow);position:relative;overflow:hidden}.hero-card:after{content:"";position:absolute;inset:auto -30px -50px auto;width:180px;height:180px;border-radius:50%;background:rgba(255,138,61,.18)}
.hero-card img{border-radius:24px;position:relative;z-index:1}.floating-note{position:absolute;z-index:2;right:18px;bottom:18px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:12px 14px;box-shadow:0 12px 28px rgba(23,33,59,.14);font-weight:800}
.stats-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:30px}.stat{padding:18px;background:#fff;border:1px solid var(--line);border-radius:22px}.stat b{display:block;font-size:28px;color:var(--orange-dark)}.stat span{font-size:13px;color:var(--muted)}
.section{padding:54px 0}.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;margin-bottom:24px}.section-head p{max-width:650px;color:var(--muted)}
.grid{display:grid;gap:18px}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:rgba(255,255,255,.88);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 12px 34px rgba(36,64,111,.08)}.card.lift{transition:transform .22s ease, box-shadow .22s ease}.card.lift:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.playlist-card{display:flex;flex-direction:column;gap:15px}.cover{position:relative;overflow:hidden;border-radius:22px;background:var(--blue-soft)}.cover img{width:100%;aspect-ratio:4/3;object-fit:cover}.tag-row{display:flex;gap:8px;flex-wrap:wrap}.tag{display:inline-flex;align-items:center;min-height:28px;padding:0 10px;border-radius:999px;background:var(--purple-2);color:var(--blue);font-size:13px;font-weight:800}.tag.orange{background:#ffe4cd;color:#9d4514}.tag.blue{background:var(--blue-soft);color:var(--blue)}
.card-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto}.mini-action{border:1px solid var(--line);border-radius:999px;background:#fff;padding:8px 12px;font-weight:800;color:var(--ink-2)}
.topic-card{position:relative;overflow:hidden}.topic-card:before{content:"";position:absolute;right:-42px;top:-42px;width:130px;height:130px;background:rgba(191,167,255,.28);border-radius:42px;transform:rotate(18deg)}.topic-card>*{position:relative}.heat{display:inline-flex;margin-bottom:12px;padding:5px 10px;border-radius:999px;background:#fff0e2;color:#a84f18;font-weight:900;font-size:13px}
.rating-row{display:flex;align-items:center;gap:12px;margin:14px 0}.stars{letter-spacing:1px;color:#ff9b3d;font-size:20px;white-space:nowrap}.score{font-size:30px;font-weight:900;color:var(--ink)}.bar{height:10px;background:var(--blue-soft);border-radius:999px;overflow:hidden}.bar i{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--orange),var(--purple))}.bar .w92{width:92%}.bar .w86{width:86%}.bar .w84{width:84%}.bar .w82{width:82%}.bar .w80{width:80%}
.circle-card{display:flex;gap:14px;align-items:flex-start}.circle-icon{display:grid;place-items:center;width:52px;height:52px;border-radius:18px;background:linear-gradient(135deg,var(--purple-2),#fff);font-size:24px;flex:0 0 auto}.bubble{position:relative;background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px}.bubble:before{content:"";position:absolute;left:22px;top:-8px;width:14px;height:14px;background:#fff;border-left:1px solid var(--line);border-top:1px solid var(--line);transform:rotate(45deg)}
.avatar-row{display:flex;align-items:center;gap:10px}.avatar{width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,var(--purple),var(--orange));display:grid;place-items:center;color:#fff;font-weight:900}.avatar.small{width:32px;height:32px;font-size:13px}.feed{display:flex;flex-direction:column;gap:14px}.feed-item{display:grid;grid-template-columns:auto 1fr;gap:12px;padding:16px;background:#fff;border:1px solid var(--line);border-radius:22px}.feed-actions{display:flex;flex-wrap:wrap;gap:10px;color:var(--muted);font-size:14px;font-weight:700;margin-top:8px}
.challenge{display:grid;grid-template-columns:.95fr 1.05fr;gap:22px;align-items:center;background:linear-gradient(135deg,#fff,var(--purple-2));border:1px solid var(--line);border-radius:34px;padding:26px;box-shadow:var(--shadow)}.challenge img{border-radius:24px}.check-list{display:grid;gap:10px;margin:18px 0 0;padding:0;list-style:none}.check-list li{padding-left:30px;position:relative}.check-list li:before{content:"✓";position:absolute;left:0;top:0;display:grid;place-items:center;width:21px;height:21px;border-radius:50%;background:var(--ink);color:#fff;font-size:13px;font-weight:900}
.notice{padding:18px 20px;border-radius:22px;background:#fff3e6;border:1px solid rgba(255,138,61,.28);color:#6f3a14}.notice strong{color:#a84f18}.domain-box{display:flex;align-items:center;justify-content:space-between;gap:16px;border:1px dashed rgba(36,64,111,.28);border-radius:24px;padding:18px;background:#fff}.domain-value{font-weight:900;color:var(--orange-dark);word-break:break-all}.copy-status{font-size:14px;color:var(--muted)}
.timeline{display:grid;gap:16px}.timeline-item{display:grid;grid-template-columns:80px 1fr;gap:16px}.timeline-dot{font-weight:900;color:var(--orange-dark)}.panel{padding:28px;border-radius:30px;background:rgba(255,255,255,.84);border:1px solid var(--line);box-shadow:var(--shadow)}
.faq{display:grid;gap:14px}.faq details{background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px}.faq summary{cursor:pointer;font-weight:900}.faq p{margin-top:10px;color:var(--muted)}
.form{display:grid;gap:14px}.form label{display:grid;gap:6px;font-weight:800}.form input,.form textarea{width:100%;border:1px solid var(--line);border-radius:16px;background:#fff;padding:12px 14px;color:var(--ink)}.form textarea{min-height:130px;resize:vertical}
.table-like{display:grid;gap:12px}.table-row{display:grid;grid-template-columns:1.1fr 1.5fr .7fr;gap:14px;align-items:center;padding:14px;border:1px solid var(--line);border-radius:18px;background:#fff}.rank{font-weight:900;color:var(--orange-dark)}
.video-card{display:grid;grid-template-columns:140px 1fr;gap:16px;align-items:center}.thumb{border-radius:18px;overflow:hidden;background:var(--blue-soft)}.thumb img{aspect-ratio:16/10;object-fit:cover}.play-dot{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--ink);color:#fff;margin-right:8px}
.cta-band{padding:34px;border-radius:34px;background:linear-gradient(135deg,var(--ink),#324f86);color:#fff;display:flex;justify-content:space-between;gap:20px;align-items:center;overflow:hidden;position:relative}.cta-band:after{content:"";position:absolute;right:-60px;bottom:-70px;width:230px;height:230px;border-radius:50%;background:rgba(255,255,255,.12)}.cta-band p{color:rgba(255,255,255,.78)}.cta-band .btn{background:#fff;color:var(--ink)}
.skip-link{position:absolute;left:-999px}.skip-link:focus{left:18px;top:18px;z-index:99;background:#fff;padding:10px;border-radius:12px}
@media (max-width:980px){.hero-grid,.challenge{grid-template-columns:1fr}.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}.section-head{align-items:flex-start;flex-direction:column}.stats-strip{grid-template-columns:repeat(2,1fr)}.video-card{grid-template-columns:1fr}.table-row{grid-template-columns:1fr}.cta-band{align-items:flex-start;flex-direction:column}}
@media (max-width:760px){.header-wrap{height:auto;min-height:68px;align-items:flex-start;padding:13px 0}.nav-toggle{display:inline-flex}.main-nav{display:none;position:absolute;left:18px;right:18px;top:64px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);justify-content:flex-start}.main-nav.open{display:flex}.main-nav a{width:calc(50% - 4px)}.hero{padding-top:42px}.grid-2,.grid-3,.grid-4,.stats-strip{grid-template-columns:1fr}.domain-box{align-items:flex-start;flex-direction:column}.timeline-item{grid-template-columns:1fr}.brand-text{font-size:19px}.card{padding:18px}.container{width:min(100% - 26px,1180px)}}