:root{
    --cream:#fff8ea;
    --cream-2:#fffdf8;
    --navy:#112449;
    --navy-2:#203765;
    --orange:#ff8a3d;
    --orange-soft:#ffe0c9;
    --purple:#b9a7ff;
    --purple-soft:#eee9ff;
    --green:#63c7a4;
    --line:rgba(17,36,73,.12);
    --shadow:0 18px 45px rgba(17,36,73,.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(--navy);
    background:
        radial-gradient(circle at 12% 6%,rgba(185,167,255,.45),transparent 32rem),
        radial-gradient(circle at 86% 14%,rgba(255,138,61,.28),transparent 26rem),
        linear-gradient(180deg,var(--cream),#fff 38%,#f9f7ff 100%);
    line-height:1.72;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input,textarea,select{font:inherit}
.notice-bar{
    display:flex;
    justify-content:center;
    gap:1.2rem;
    flex-wrap:wrap;
    padding:.5rem 1rem;
    color:#fff;
    background:linear-gradient(90deg,var(--navy),#493b87);
    font-size:.9rem;
}
.site-header{
    position:sticky;
    top:0;
    z-index:50;
    backdrop-filter:blur(16px);
    background:rgba(255,248,234,.86);
    border-bottom:1px solid var(--line);
}
.nav-wrap{
    width:min(1180px,92vw);
    margin:auto;
    min-height:76px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:1rem;
}
.brand,.footer-brand{display:flex;align-items:center;gap:.75rem;font-weight:800}
.brand strong{display:block;font-size:1.22rem;line-height:1.1}.brand em{display:block;font-style:normal;font-size:.82rem;color:#6b7390}
.main-nav{display:flex;align-items:center;gap:.25rem;flex-wrap:wrap;justify-content:flex-end}
.main-nav a{padding:.65rem .85rem;border-radius:999px;color:#33405f;font-weight:700;font-size:.95rem}
.main-nav a:hover,.main-nav a.active{background:#fff;color:var(--navy);box-shadow:0 8px 20px rgba(17,36,73,.08)}
.nav-toggle{display:none;border:0;background:var(--navy);color:#fff;border-radius:999px;padding:.6rem 1rem;font-weight:800}
.container{width:min(1180px,92vw);margin:auto}.main{overflow:hidden}
.hero{padding:76px 0 48px}.hero-grid{display:grid;grid-template-columns:1.04fr .96fr;gap:2.2rem;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:.45rem;background:#fff;border:1px solid var(--line);border-radius:999px;padding:.42rem .78rem;font-weight:800;color:#6a4bc0;box-shadow:0 10px 30px rgba(17,36,73,.08)}
h1{font-size:clamp(2.2rem,5vw,4.65rem);line-height:1.08;margin:1rem 0;color:var(--navy);letter-spacing:-.08rem}
.lead{font-size:1.13rem;color:#4f5a75;max-width:680px}.hero-actions,.section-actions{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:1.4rem}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;border-radius:999px;padding:.82rem 1.18rem;font-weight:900;border:1px solid transparent;transition:.2s transform,.2s box-shadow,.2s background}
.btn:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(17,36,73,.15)}.btn.primary{background:var(--orange);color:#fff}.btn.secondary{background:#fff;color:var(--navy);border-color:var(--line)}
.hero-card{position:relative;border-radius:36px;background:rgba(255,255,255,.76);padding:1rem;box-shadow:var(--shadow);border:1px solid rgba(255,255,255,.8)}
.hero-card:before{content:"";position:absolute;inset:-1rem auto auto -1rem;width:7rem;height:7rem;background:var(--orange-soft);border-radius:2rem;z-index:-1;transform:rotate(-10deg)}
.hero-card:after{content:"";position:absolute;right:-1.2rem;bottom:-1.2rem;width:9rem;height:9rem;background:var(--purple-soft);border-radius:50%;z-index:-1}
.hero-card img{border-radius:28px;background:var(--cream-2)}
.badge-row{display:flex;flex-wrap:wrap;gap:.55rem;margin-top:1.4rem}.badge{background:rgba(255,255,255,.75);border:1px solid var(--line);border-radius:999px;padding:.45rem .72rem;font-weight:800;color:#44506d}
.quick-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;margin-top:2rem}.stat{background:#fff;border:1px solid var(--line);border-radius:22px;padding:1rem;box-shadow:0 10px 24px rgba(17,36,73,.07)}
.stat strong{display:block;font-size:1.7rem;color:var(--navy)}.stat span{font-size:.9rem;color:#6b7390}.sample-mark{display:inline-flex;border-radius:999px;background:var(--purple-soft);color:#6750a9;font-size:.78rem;padding:.16rem .52rem;font-weight:900;margin-left:.3rem}
.section{padding:54px 0}.section-head{display:flex;justify-content:space-between;gap:1.2rem;align-items:flex-end;margin-bottom:1.35rem}.section-head h2{font-size:clamp(1.6rem,3vw,2.5rem);line-height:1.16;margin:0}.section-head p{margin:.45rem 0 0;color:#66708b;max-width:720px}.section-kicker{font-weight:900;color:#8a5df6;letter-spacing:.08rem}
.grid{display:grid;gap:1.1rem}.grid.three{grid-template-columns:repeat(3,1fr)}.grid.four{grid-template-columns:repeat(4,1fr)}.grid.two{grid-template-columns:repeat(2,1fr)}
.card{background:rgba(255,255,255,.86);border:1px solid var(--line);border-radius:var(--radius);padding:1.15rem;box-shadow:0 12px 32px rgba(17,36,73,.08);position:relative;overflow:hidden}.card:hover .float-icon{transform:scale(1.04) rotate(1deg)}
.card h3{margin:.75rem 0 .35rem;font-size:1.25rem}.card p{color:#5d6782;margin:.35rem 0}.cover{border-radius:20px;overflow:hidden;background:var(--cream-2);border:1px solid rgba(17,36,73,.08)}
.card-meta,.tag-row{display:flex;gap:.5rem;flex-wrap:wrap;align-items:center;margin-top:.8rem}.pill{display:inline-flex;align-items:center;gap:.28rem;border-radius:999px;padding:.32rem .58rem;background:var(--cream);border:1px solid var(--line);font-weight:800;font-size:.84rem;color:#52607c}.pill.hot{background:var(--orange-soft);color:#a64a14}.pill.purple{background:var(--purple-soft);color:#614fb0}.pill.green{background:#e6f8f2;color:#247e61}
.interact{display:flex;align-items:center;justify-content:space-between;gap:.8rem;margin-top:1rem;padding-top:1rem;border-top:1px dashed var(--line)}.mini-actions{display:flex;gap:.5rem;flex-wrap:wrap}.mini-btn{border:0;background:#fff;border-radius:999px;padding:.45rem .68rem;box-shadow:0 6px 16px rgba(17,36,73,.08);font-weight:800;color:#485570}.mini-btn.saved{background:var(--navy);color:#fff}.avatar-row{display:flex;align-items:center}.avatar{width:38px;height:38px;border-radius:50%;border:3px solid #fff;margin-left:-9px;background:#fff;box-shadow:0 6px 14px rgba(17,36,73,.14)}.avatar:first-child{margin-left:0}
.topic-card{min-height:205px;display:flex;flex-direction:column;justify-content:space-between}.topic-title{display:flex;gap:.75rem;align-items:flex-start}.topic-icon{width:48px;height:48px;border-radius:16px;background:linear-gradient(135deg,var(--orange),var(--purple));display:grid;place-items:center;color:#fff;font-size:1.4rem;flex:0 0 auto}.comment-bubble{background:var(--cream-2);border:1px solid var(--line);border-radius:22px 22px 22px 6px;padding:1rem;position:relative}.comment-bubble strong{display:block}.stars{letter-spacing:.08rem;color:#ff9f2e;font-weight:900}.score-large{font-size:2.3rem;font-weight:900;line-height:1;color:var(--navy)}
.ranking{counter-reset:rank;display:grid;gap:.75rem}.rank-item{counter-increment:rank;display:grid;grid-template-columns:auto 1fr auto;gap:.8rem;align-items:center;background:#fff;border:1px solid var(--line);border-radius:18px;padding:.85rem}.rank-item:before{content:counter(rank);width:2.1rem;height:2.1rem;border-radius:50%;background:var(--navy);color:#fff;display:grid;place-items:center;font-weight:900}.rank-item small{color:#6d7690}
.challenge{display:grid;grid-template-columns:.85fr 1.15fr;gap:1.4rem;align-items:center;background:linear-gradient(135deg,#fff,#f3edff 58%,#fff1e6);border-radius:34px;padding:1.2rem;border:1px solid rgba(17,36,73,.1);box-shadow:var(--shadow)}.challenge img{border-radius:26px}.progress{height:12px;background:#fff;border-radius:999px;overflow:hidden;margin:.7rem 0;border:1px solid var(--line)}.progress span{display:block;height:100%;width:68%;background:linear-gradient(90deg,var(--orange),var(--purple));border-radius:999px}.timeline{position:relative;display:grid;gap:1rem}.timeline:before{content:"";position:absolute;left:24px;top:10px;bottom:10px;width:2px;background:var(--line)}.timeline-item{display:grid;grid-template-columns:50px 1fr;gap:.8rem;position:relative}.timeline-dot{width:50px;height:50px;border-radius:18px;background:#fff;box-shadow:0 8px 22px rgba(17,36,73,.1);display:grid;place-items:center;font-weight:900;color:#7a5ce2}.timeline-content{background:#fff;border:1px solid var(--line);border-radius:20px;padding:1rem}.domain-panel{background:var(--navy);color:#fff;border-radius:28px;padding:1.4rem;display:grid;gap:.7rem}.domain-panel strong{font-size:1.35rem}.domain-chip{display:inline-flex;width:max-content;max-width:100%;overflow-wrap:anywhere;border-radius:999px;background:rgba(255,255,255,.14);padding:.45rem .75rem;border:1px solid rgba(255,255,255,.24)}
.faq-list{display:grid;gap:.8rem}.faq-item{background:#fff;border:1px solid var(--line);border-radius:20px;overflow:hidden}.faq-question{width:100%;text-align:left;border:0;background:transparent;color:var(--navy);font-weight:900;padding:1rem 1.2rem;display:flex;justify-content:space-between;gap:1rem;cursor:pointer}.faq-answer{display:none;padding:0 1.2rem 1rem;color:#5d6782}.faq-item.open .faq-answer{display:block}.faq-item.open .faq-question span:last-child{transform:rotate(45deg)}
.page-hero{padding:64px 0 26px}.page-hero .inner{background:rgba(255,255,255,.78);border:1px solid var(--line);border-radius:34px;padding:2rem;display:grid;grid-template-columns:1.1fr .9fr;gap:1.4rem;align-items:center;box-shadow:var(--shadow)}.page-hero h1{font-size:clamp(2rem,4vw,3.6rem)}.content-band{background:rgba(255,255,255,.56);border-top:1px solid rgba(17,36,73,.08);border-bottom:1px solid rgba(17,36,73,.08)}
.feature-list{display:grid;gap:.9rem}.feature{display:flex;gap:.8rem;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:20px;padding:1rem}.feature b{display:grid;place-items:center;flex:0 0 auto;width:2.3rem;height:2.3rem;border-radius:14px;background:var(--orange-soft);color:#b25218}.media-card{display:grid;grid-template-columns:160px 1fr;gap:1rem;align-items:center}.play{width:54px;height:54px;border-radius:50%;background:var(--orange);color:#fff;display:grid;place-items:center;font-weight:900;box-shadow:0 12px 24px rgba(255,138,61,.35)}
.form-card{background:#fff;border:1px solid var(--line);border-radius:28px;padding:1.3rem;box-shadow:var(--shadow)}.form-grid{display:grid;gap:.9rem}.field label{display:block;font-weight:900;margin-bottom:.35rem}.field input,.field textarea,.field select{width:100%;border:1px solid var(--line);border-radius:16px;padding:.85rem 1rem;background:#fffdf7;color:var(--navy)}.field textarea{min-height:140px;resize:vertical}.form-note{font-size:.92rem;color:#6b7390}.toast{display:none;margin-top:.8rem;border-radius:16px;background:#e6f8f2;color:#247e61;padding:.75rem 1rem;font-weight:800}.toast.show{display:block}
.site-footer{margin-top:48px;background:#0f1f3e;color:#fff;padding:48px 0 22px}.footer-grid{width:min(1180px,92vw);margin:auto;display:grid;grid-template-columns:1.2fr .9fr .9fr;gap:1.4rem}.footer-grid h2{font-size:1.05rem}.footer-grid p{color:rgba(255,255,255,.72)}.footer-brand img{background:#fff;border-radius:14px}.footer-bottom{width:min(1180px,92vw);margin:28px auto 0;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;color:rgba(255,255,255,.76)}
.float-icon{transition:.25s transform}.only-mobile{display:none}
@media (max-width:980px){.hero-grid,.page-hero .inner,.challenge{grid-template-columns:1fr}.grid.four{grid-template-columns:repeat(2,1fr)}.grid.three{grid-template-columns:repeat(2,1fr)}.quick-stats{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1fr 1fr}.media-card{grid-template-columns:1fr}.section-head{align-items:flex-start;flex-direction:column}.hero{padding-top:48px}}
@media (max-width:760px){.notice-bar{justify-content:flex-start}.nav-toggle{display:inline-flex}.main-nav{display:none;position:absolute;left:4vw;right:4vw;top:116px;background:#fff;border:1px solid var(--line);border-radius:22px;padding:.7rem;box-shadow:var(--shadow);align-items:stretch;flex-direction:column}.main-nav.open{display:flex}.main-nav a{width:100%}.grid.three,.grid.four,.grid.two,.footer-grid{grid-template-columns:1fr}.hero{padding-top:36px}.hero-actions,.section-actions{flex-direction:column}.btn{width:100%}h1{letter-spacing:-.04rem}.page-hero .inner{padding:1.25rem}.only-mobile{display:block}.quick-stats{grid-template-columns:1fr}.card{padding:1rem}}