:root{
    --cream:#fff8ed;
    --cream-2:#fff1dd;
    --navy:#17284a;
    --navy-2:#233a68;
    --orange:#ff8a3d;
    --orange-2:#ffb067;
    --purple:#bca7ff;
    --purple-2:#efe9ff;
    --mint:#d9f3e8;
    --ink:#24304b;
    --muted:#68748c;
    --line:rgba(23,40,74,.12);
    --card:#ffffff;
    --shadow:0 20px 60px rgba(23,40,74,.12);
    --radius:28px;
}
*{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% 12%, rgba(255,176,103,.25), transparent 28rem),
        radial-gradient(circle at 92% 4%, rgba(188,167,255,.28), transparent 24rem),
        linear-gradient(180deg,var(--cream),#fff 42%,#fbf8ff);
    line-height:1.75;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(1160px,calc(100% - 32px));margin-inline:auto}
.site-header{
    position:sticky;top:0;z-index:20;
    backdrop-filter:blur(18px);
    background:rgba(255,248,237,.84);
    border-bottom:1px solid var(--line);
}
.nav-wrap{min-height:74px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand,.footer-brand{display:inline-flex;align-items:center;gap:10px;font-weight:900;color:var(--navy)}
.brand-mark{
    width:42px;height:42px;border-radius:15px;
    display:inline-grid;place-items:center;
    background:linear-gradient(135deg,var(--navy),var(--purple));
    color:#fff;box-shadow:0 12px 30px rgba(23,40,74,.18);
}
.brand-text{font-size:24px;letter-spacing:.02em}
.brand-text em{font-style:normal;color:var(--orange);font-size:16px;margin-left:4px}
.site-nav{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.site-nav a{
    padding:10px 14px;border-radius:999px;
    color:var(--navy);font-weight:700;font-size:15px;
}
.site-nav a:hover,.site-nav a.is-active{background:var(--navy);color:#fff}
.nav-toggle{display:none;border:0;background:transparent;padding:8px;cursor:pointer}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--navy);margin:5px 0;border-radius:99px}
.hero{padding:76px 0 46px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:38px;align-items:center}
.eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    padding:7px 12px;border-radius:999px;
    background:rgba(255,138,61,.13);color:#a14b0e;font-weight:800;font-size:14px;
}
.eyebrow::before{content:"";width:9px;height:9px;border-radius:50%;background:var(--orange);box-shadow:0 0 0 6px rgba(255,138,61,.16)}
h1,h2,h3{line-height:1.2;color:var(--navy);margin:0 0 14px}
h1{font-size:clamp(36px,5vw,68px);letter-spacing:-.05em}
h2{font-size:clamp(28px,3.3vw,42px);letter-spacing:-.03em}
h3{font-size:22px}
.lead{font-size:18px;color:#4c5873;margin:0 0 22px}
.hero-actions,.inline-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:24px}
.btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:46px;padding:0 20px;border-radius:999px;
    border:1px solid transparent;font-weight:900;cursor:pointer;
    transition:transform .2s ease,box-shadow .2s ease,background .2s ease;
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--navy);color:#fff;box-shadow:0 14px 34px rgba(23,40,74,.22)}
.btn-soft{background:#fff;color:var(--navy);border-color:var(--line)}
.btn-orange{background:var(--orange);color:#fff;box-shadow:0 14px 34px rgba(255,138,61,.25)}
.hero-card{
    background:rgba(255,255,255,.74);
    border:1px solid rgba(255,255,255,.9);
    box-shadow:var(--shadow);
    border-radius:36px;
    padding:20px;
    position:relative;overflow:hidden;
}
.hero-card::after{
    content:"";position:absolute;inset:auto -70px -90px auto;width:220px;height:220px;border-radius:50%;
    background:rgba(255,138,61,.14);
}
.hero-visual{position:relative;z-index:1;border-radius:28px;overflow:hidden;background:var(--purple-2)}
.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:16px;position:relative;z-index:2}
.stat{padding:16px;border-radius:20px;background:#fff;border:1px solid var(--line)}
.stat strong{display:block;font-size:24px;color:var(--navy)}
.stat span{font-size:13px;color:var(--muted)}
.notice{
    margin-top:18px;padding:14px 16px;border:1px dashed rgba(255,138,61,.5);
    background:rgba(255,248,237,.82);border-radius:18px;color:#6a4b25;font-size:14px;
}
.section{padding:52px 0}
.section.alt{background:linear-gradient(180deg,rgba(239,233,255,.42),rgba(255,248,237,.28));border-block:1px solid var(--line)}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:24px}
.section-head p{max-width:640px;color:var(--muted);margin:0}
.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{
    background:rgba(255,255,255,.86);
    border:1px solid var(--line);
    border-radius:var(--radius);
    padding:22px;
    box-shadow:0 12px 32px rgba(23,40,74,.07);
}
.card:hover{box-shadow:var(--shadow)}
.card img{border-radius:22px;margin-bottom:16px;background:var(--cream-2)}
.tags{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0}
.tag{
    display:inline-flex;align-items:center;border-radius:999px;
    padding:5px 10px;background:var(--purple-2);
    color:var(--navy);font-size:13px;font-weight:800;
}
.tag.orange{background:rgba(255,138,61,.14);color:#8a410e}
.info-line{display:flex;align-items:center;gap:12px;flex-wrap:wrap;color:var(--muted);font-size:14px}
.interactions{display:flex;align-items:center;gap:10px;margin-top:16px;flex-wrap:wrap}
.pill{
    display:inline-flex;align-items:center;gap:6px;
    border:1px solid var(--line);background:#fff;border-radius:999px;
    padding:8px 12px;font-weight:800;color:var(--navy);font-size:14px;
}
.topic-card{
    position:relative;overflow:hidden;min-height:220px;
    display:flex;flex-direction:column;justify-content:space-between;
}
.topic-card::before{
    content:"";position:absolute;right:-48px;top:-54px;width:150px;height:150px;border-radius:50%;
    background:rgba(188,167,255,.34);
}
.topic-card>*{position:relative}
.avatar-row{display:flex;align-items:center}
.avatar-row img{width:40px;height:40px;border-radius:50%;margin:0 -8px 0 0;border:3px solid #fff}
.score-stars{color:#ff9d2d;letter-spacing:2px;font-size:20px;white-space:nowrap}
.review{
    display:grid;grid-template-columns:auto 1fr;gap:14px;align-items:start;
}
.review .avatar{width:54px;height:54px;border-radius:18px;margin:0;background:var(--purple-2)}
.bubble{
    background:#fff;border:1px solid var(--line);border-radius:22px 22px 22px 8px;
    padding:16px;position:relative;
}
.bubble p{margin:0;color:#4d5871}
.timeline{display:grid;gap:16px}
.feed-item{display:flex;gap:14px;align-items:flex-start}
.feed-item img{width:54px;height:54px;border-radius:18px;margin:0}
.feed-body{flex:1;background:#fff;border:1px solid var(--line);border-radius:22px;padding:16px}
.feed-body p{margin:6px 0 0;color:var(--muted)}
.challenge{
    display:grid;grid-template-columns:.9fr 1.1fr;gap:22px;align-items:center;
    background:linear-gradient(135deg,var(--navy),#33487b);
    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:26px;background:rgba(255,255,255,.1)}
.steps{counter-reset:item;display:grid;gap:14px}
.step{
    counter-increment:item;display:grid;grid-template-columns:auto 1fr;gap:14px;
    padding:18px;border-radius:22px;background:#fff;border:1px solid var(--line);
}
.step::before{
    content:counter(item);
    width:36px;height:36px;border-radius:13px;background:var(--navy);color:#fff;
    display:grid;place-items:center;font-weight:900;
}
.faq{display:grid;gap:14px}
.faq details{
    background:#fff;border:1px solid var(--line);border-radius:22px;padding:16px 18px;
}
.faq summary{font-weight:900;color:var(--navy);cursor:pointer}
.faq p{color:var(--muted);margin:10px 0 0}
.page-hero{padding:64px 0 32px}
.page-hero .lead{max-width:780px}
.kpi-strip{
    display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:24px;
}
.kpi{
    padding:18px;border-radius:24px;background:#fff;border:1px solid var(--line);
}
.kpi strong{display:block;font-size:28px;color:var(--navy)}
.kpi span{color:var(--muted);font-size:14px}
.table-card{overflow:auto}
.rank-table{width:100%;border-collapse:collapse;min-width:720px}
.rank-table th,.rank-table td{padding:16px;border-bottom:1px solid var(--line);text-align:left}
.rank-table th{color:var(--navy);background:var(--cream-2)}
.rank-table tr:last-child td{border-bottom:0}
.form{
    display:grid;gap:14px;
}
.form label{font-weight:900;color:var(--navy)}
.form input,.form textarea,.form select{
    width:100%;border:1px solid var(--line);border-radius:16px;padding:13px 14px;
    font:inherit;background:#fff;color:var(--ink);
}
.form textarea{min-height:130px;resize:vertical}
.contact-panel{
    background:linear-gradient(135deg,rgba(255,138,61,.14),rgba(188,167,255,.22));
    border:1px solid var(--line);border-radius:34px;padding:26px;
}
.video-card .play{
    width:54px;height:54px;border-radius:50%;display:grid;place-items:center;
    background:var(--orange);color:#fff;font-weight:900;margin-top:-46px;margin-left:16px;
    position:relative;border:5px solid #fff;
}
.sidebar-note{
    border-left:5px solid var(--orange);
    background:rgba(255,138,61,.1);
    padding:18px;border-radius:0 20px 20px 0;
}
@media (max-width:900px){
    .hero-grid,.challenge{grid-template-columns:1fr}
    .grid-3,.grid-4,.kpi-strip{grid-template-columns:repeat(2,minmax(0,1fr))}
    .section-head{align-items:start;flex-direction:column}
}
@media (max-width:720px){
    .nav-toggle{display:block}
    .site-nav{
        position:absolute;left:16px;right:16px;top:74px;
        display:none;flex-direction:column;align-items:stretch;
        background:#fff;border:1px solid var(--line);border-radius:24px;padding:12px;box-shadow:var(--shadow);
    }
    .site-nav.is-open{display:flex}
    .site-nav a{text-align:center}
    .hero{padding-top:46px}
    .grid-2,.grid-3,.grid-4,.kpi-strip{grid-template-columns:1fr}
    .stat-row{grid-template-columns:1fr}
    .review{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1fr}
}
.site-footer{
    margin-top:52px;background:var(--navy);color:rgba(255,255,255,.78);padding:46px 0;
}
.footer-grid{display:grid;grid-template-columns:1.2fr .7fr .9fr;gap:24px}
.site-footer h3{color:#fff;font-size:18px}
.site-footer a{display:block;color:rgba(255,255,255,.86);margin:8px 0}
.footer-brand{color:#fff;margin-bottom:12px}
.footer-brand .brand-mark{background:linear-gradient(135deg,var(--orange),var(--purple))}