:root{
    --cream:#fff8ea;
    --cream-2:#fff2d3;
    --blue:#10284d;
    --blue-2:#1d3f76;
    --orange:#ff8b3d;
    --orange-2:#ffb169;
    --purple:#bba2ff;
    --purple-2:#ede6ff;
    --ink:#18253f;
    --muted:#68728a;
    --line:rgba(16,40,77,.12);
    --card:#ffffff;
    --shadow:0 18px 45px rgba(16,40,77,.12);
    --radius:26px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
    margin:0;
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;
    color:var(--ink);
    background:
        radial-gradient(circle at 8% 0%, rgba(255,139,61,.18), transparent 32rem),
        radial-gradient(circle at 92% 12%, rgba(187,162,255,.22), transparent 28rem),
        linear-gradient(180deg,var(--cream),#fff 48%,#f7f3ff 100%);
    line-height:1.75;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.site-header{
    position:sticky;top:0;z-index:30;
    display:flex;align-items:center;justify-content:space-between;gap:1rem;
    padding:14px clamp(18px,4vw,56px);
    background:rgba(255,248,234,.88);
    backdrop-filter:blur(18px);
    border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:.72rem;font-weight:900;color:var(--blue)}
.brand-mark{
    display:grid;place-items:center;width:50px;height:50px;border-radius:18px;
    color:#fff;background:linear-gradient(135deg,var(--blue),var(--orange));
    box-shadow:0 10px 25px rgba(16,40,77,.22);
    letter-spacing:-.05em;font-size:1.25rem;
}
.brand-text{font-size:1.05rem;white-space:nowrap}
.site-nav{display:flex;align-items:center;gap:.28rem;flex-wrap:wrap;justify-content:flex-end}
.site-nav a{
    padding:.58rem .82rem;border-radius:999px;color:#233d67;font-weight:700;font-size:.95rem;
}
.site-nav a:hover,.site-nav a.active{background:var(--blue);color:#fff}
.nav-toggle{display:none;border:0;border-radius:14px;background:var(--blue);color:#fff;font-size:1.25rem;padding:.55rem .72rem}
main{width:min(1180px,calc(100% - 32px));margin:0 auto;padding:34px 0 76px}
.hero{
    display:grid;grid-template-columns:minmax(0,1.05fr) minmax(310px,.95fr);gap:32px;align-items:center;
    padding:42px 0 28px;
}
.eyebrow{display:inline-flex;align-items:center;gap:.45rem;border:1px solid var(--line);background:rgba(255,255,255,.7);border-radius:999px;padding:.36rem .75rem;color:var(--blue);font-weight:800;font-size:.9rem}
h1{font-size:clamp(2.1rem,5.4vw,4.8rem);line-height:1.06;margin:18px 0;color:var(--blue);letter-spacing:-.06em}
h2{font-size:clamp(1.65rem,3vw,2.6rem);line-height:1.16;color:var(--blue);margin:0 0 10px;letter-spacing:-.04em}
h3{font-size:1.18rem;margin:0 0 8px;color:var(--blue)}
.lead{font-size:1.1rem;color:#3e4b64;max-width:680px;margin:0 0 22px}
.hero-actions,.inline-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.45rem;border-radius:999px;padding:.84rem 1.15rem;font-weight:850;border:1px solid transparent;transition:.2s transform,.2s box-shadow,.2s background}
.btn:hover{transform:translateY(-2px);box-shadow:0 12px 24px rgba(16,40,77,.12)}
.btn.primary{background:var(--blue);color:#fff}
.btn.secondary{background:#fff;color:var(--blue);border-color:var(--line)}
.btn.soft{background:var(--purple-2);color:var(--blue)}
.hero-visual{position:relative}
.hero-card{background:rgba(255,255,255,.76);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px;overflow:hidden}
.hero-card img{border-radius:20px;background:var(--cream-2)}
.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:16px}
.stat{border-radius:18px;background:#fff;padding:14px;border:1px solid var(--line)}
.stat b{display:block;color:var(--blue);font-size:1.35rem;line-height:1}
.stat span{color:var(--muted);font-size:.86rem}
.section{margin-top:54px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:18px}
.section-head p{margin:0;color:var(--muted);max-width:610px}
.grid{display:grid;gap:18px}
.grid.three{grid-template-columns:repeat(3,1fr)}
.grid.two{grid-template-columns:repeat(2,1fr)}
.card{background:rgba(255,255,255,.82);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 12px 30px rgba(16,40,77,.07)}
.card.highlight{background:linear-gradient(135deg,#fff,var(--cream-2));border-color:rgba(255,139,61,.25)}
.card p{color:#506078;margin:0 0 14px}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.tag{display:inline-flex;align-items:center;gap:.3rem;background:#fff;border:1px solid var(--line);color:#24436f;border-radius:999px;padding:.32rem .65rem;font-weight:750;font-size:.82rem}
.playlist-card{display:grid;grid-template-columns:108px minmax(0,1fr);gap:16px;align-items:center}
.playlist-cover{height:112px;border-radius:20px;overflow:hidden;background:var(--purple-2);border:1px solid var(--line)}
.playlist-cover img{width:100%;height:100%;object-fit:cover}
.meta-line{display:flex;flex-wrap:wrap;gap:10px;color:var(--muted);font-size:.9rem;margin-top:8px}
.pill-button{border:0;border-radius:999px;background:var(--orange);color:#fff;font-weight:850;padding:.55rem .9rem;cursor:pointer}
.topic{display:flex;gap:14px;align-items:flex-start}
.topic .bubble{width:48px;height:48px;border-radius:18px;display:grid;place-items:center;background:var(--purple-2);font-size:1.35rem;flex:0 0 auto}
.rating{display:flex;gap:4px;color:#ff9a2f;letter-spacing:.04em;font-size:1.12rem;white-space:nowrap}
.score-card{display:flex;justify-content:space-between;gap:16px;align-items:flex-start}
.score-card .score{font-size:2.2rem;line-height:1;color:var(--blue);font-weight:950}
.circle-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.circle{background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px;text-align:center}
.circle img{width:78px;margin:0 auto 10px}
.challenge{display:grid;grid-template-columns:.9fr 1.1fr;gap:20px;align-items:center;background:linear-gradient(135deg,var(--blue),#203a6d);color:#fff;border-radius:34px;padding:24px;overflow:hidden}
.challenge h2,.challenge h3{color:#fff}
.challenge p{color:rgba(255,255,255,.82)}
.challenge img{border-radius:22px;background:#fff5}
.review{position:relative;padding-left:58px}
.avatar{position:absolute;left:0;top:22px;width:44px;height:44px;border-radius:16px;background:var(--purple-2);display:grid;place-items:center;font-weight:900;color:var(--blue)}
.review blockquote{margin:0;color:#47566f}
.review cite{display:block;margin-top:12px;color:var(--muted);font-style:normal;font-size:.9rem}
.feed-item{display:flex;gap:14px;border-bottom:1px dashed var(--line);padding:14px 0}
.feed-item:last-child{border-bottom:0}
.feed-item .mini-avatar{width:42px;height:42px;border-radius:15px;background:linear-gradient(135deg,var(--purple),var(--orange-2));display:grid;place-items:center;color:#fff;font-weight:900;flex:0 0 auto}
.feed-item p{margin:0;color:#506078}
.notice{background:rgba(255,139,61,.1);border:1px solid rgba(255,139,61,.22);border-radius:22px;padding:16px;color:#624225}
.faq details{background:#fff;border:1px solid var(--line);border-radius:20px;padding:16px 18px;margin-bottom:12px}
.faq summary{cursor:pointer;font-weight:850;color:var(--blue)}
.form-card label{display:block;font-weight:800;color:var(--blue);margin:.7rem 0 .3rem}
.input,textarea,select{width:100%;border:1px solid var(--line);border-radius:16px;background:#fff;padding:.85rem 1rem;font:inherit;color:var(--ink)}
textarea{min-height:120px;resize:vertical}
.site-footer{background:var(--blue);color:#fff;padding:36px clamp(18px,4vw,56px)}
.footer-grid{display:grid;grid-template-columns:1.1fr 1fr 1fr;gap:24px;width:min(1180px,100%);margin:0 auto}
.site-footer p{color:rgba(255,255,255,.74);margin:.45rem 0 0}
.site-footer strong{display:block;margin-bottom:4px}
.current-domain{word-break:break-all}
.table-wrap{overflow:auto;border-radius:22px;border:1px solid var(--line);background:#fff}
table{width:100%;border-collapse:collapse;min-width:680px}
th,td{text-align:left;padding:14px 16px;border-bottom:1px solid var(--line)}
th{color:var(--blue);background:var(--cream-2)}
tr:last-child td{border-bottom:0}
.kpi-row{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.kpi{background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px}
.kpi b{display:block;color:var(--blue);font-size:1.9rem;line-height:1}
.kpi span{color:var(--muted);font-size:.9rem}
.video-card{display:grid;grid-template-columns:145px minmax(0,1fr);gap:16px;align-items:center}
.video-thumb{border-radius:20px;overflow:hidden;background:var(--cream-2);border:1px solid var(--line)}
.badge{display:inline-flex;align-items:center;border-radius:999px;background:var(--blue);color:#fff;padding:.25rem .62rem;font-size:.78rem;font-weight:850}
@media (max-width:920px){
    .hero,.challenge{grid-template-columns:1fr}
    .grid.three,.grid.two,.circle-grid,.kpi-row,.footer-grid{grid-template-columns:1fr 1fr}
    .section-head{display:block}
}
@media (max-width:680px){
    .site-header{align-items:flex-start}
    .nav-toggle{display:block}
    .site-nav{display:none;position:absolute;left:16px;right:16px;top:76px;background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);padding:12px;justify-content:flex-start}
    .site-nav.open{display:flex}
    .site-nav a{width:100%}
    .grid.three,.grid.two,.circle-grid,.kpi-row,.footer-grid,.stat-row{grid-template-columns:1fr}
    .playlist-card,.video-card{grid-template-columns:1fr}
    main{width:min(100% - 22px,1180px);padding-top:18px}
    .hero{padding-top:18px}
    .card{padding:18px;border-radius:22px}
}