:root{
  --cream:#fff8ed;
  --cream-2:#fff1dd;
  --navy:#13233f;
  --navy-2:#243b63;
  --orange:#ff8a3d;
  --orange-2:#ffb067;
  --purple:#b9a7ff;
  --purple-2:#efe9ff;
  --ink:#1d2433;
  --muted:#687086;
  --card:#ffffff;
  --line:rgba(19,35,63,.12);
  --shadow:0 24px 60px rgba(19,35,63,.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:linear-gradient(135deg,var(--cream) 0%,#fff 42%,var(--purple-2) 100%);line-height:1.7}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
button,input,textarea{font:inherit}
.site-header{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:16px clamp(18px,4vw,58px);background:rgba(255,248,237,.88);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:12px;min-width:max-content}
.brand-mark{width:46px;height:46px;border-radius:18px;background:linear-gradient(135deg,var(--orange),var(--purple));display:grid;place-items:center;color:white;font-weight:900;box-shadow:0 10px 24px rgba(255,138,61,.28)}
.brand strong{display:block;font-size:20px;color:var(--navy);letter-spacing:.02em}.brand em{display:block;font-style:normal;font-size:12px;color:var(--muted)}
.site-nav{display:flex;gap:4px;align-items:center;flex-wrap:wrap;justify-content:flex-end}.site-nav a{padding:10px 14px;border-radius:999px;color:var(--navy);font-weight:700;font-size:14px}.site-nav a:hover,.site-nav a:focus{background:white;box-shadow:0 10px 20px rgba(19,35,63,.08)}
.nav-toggle{display:none;border:0;background:var(--navy);color:#fff;border-radius:14px;padding:8px 12px}
main{overflow:hidden}.container{width:min(1160px,calc(100% - 36px));margin:0 auto}.section{padding:72px 0}.section-tight{padding:48px 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:28px;margin-bottom:28px}.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 13px;border-radius:999px;background:rgba(255,138,61,.13);color:#c85810;font-weight:800;font-size:13px}.section h1,.section h2,.page-hero h1{color:var(--navy);line-height:1.18;margin:12px 0}.section h2{font-size:clamp(28px,4vw,44px)}.page-hero h1{font-size:clamp(34px,6vw,68px);max-width:820px}.lead{font-size:clamp(17px,2.3vw,21px);color:#46506a;max-width:780px}.muted{color:var(--muted)}
.hero{position:relative;padding:72px 0 42px}.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 10% 10%,rgba(255,138,61,.20),transparent 34%),radial-gradient(circle at 88% 2%,rgba(185,167,255,.28),transparent 30%);pointer-events:none}.hero-grid{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center}.hero-card{background:rgba(255,255,255,.74);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:var(--radius);padding:28px}.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px}.primary-btn,.secondary-btn,.ghost-btn,.pill-btn{border:0;cursor:pointer;border-radius:999px;font-weight:900;display:inline-flex;align-items:center;justify-content:center;gap:8px}.primary-btn{background:var(--navy);color:white;padding:13px 20px;box-shadow:0 14px 26px rgba(19,35,63,.22)}.secondary-btn{background:white;color:var(--navy);padding:13px 20px;border:1px solid var(--line)}.ghost-btn{background:rgba(255,255,255,.86);color:var(--navy);padding:9px 14px;border:1px solid var(--line)}.pill-btn{background:var(--orange);color:#fff;padding:9px 14px}.stats-row{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:26px}.stat{padding:16px;border-radius:22px;background:#fff;border:1px solid var(--line)}.stat strong{display:block;color:var(--navy);font-size:25px}.stat span{color:var(--muted);font-size:13px}.note{display:inline-block;padding:8px 12px;border-radius:14px;background:var(--purple-2);color:#5a4ba2;font-weight:700;font-size:13px;margin-top:16px}.hero-visual{position:relative}.floating-badge{position:absolute;right:10px;bottom:18px;background:#fff;border:1px solid var(--line);box-shadow:0 18px 40px rgba(19,35,63,.16);border-radius:22px;padding:14px 16px;font-weight:900;color:var(--navy)}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}.card{background:rgba(255,255,255,.88);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 14px 40px rgba(19,35,63,.08);padding:22px;position:relative;overflow:hidden}.card h3{color:var(--navy);font-size:22px;line-height:1.25;margin:14px 0 8px}.card p{margin:8px 0;color:#4c566f}.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}.tag{border-radius:999px;background:var(--cream-2);color:#b25418;padding:5px 10px;font-size:12px;font-weight:800}.tag.purple{background:var(--purple-2);color:#5a4ba2}.tag.navy{background:#e9effc;color:var(--navy)}.list-cover{height:160px;border-radius:24px;overflow:hidden;background:linear-gradient(135deg,#182848,#ff8a3d);margin:-4px -4px 10px}.card-actions{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:18px}.mini-metrics{display:flex;gap:12px;flex-wrap:wrap;color:var(--muted);font-size:13px}.collect-btn,.like-btn{border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 12px;font-weight:900;color:var(--navy);cursor:pointer}.collect-btn:hover,.like-btn:hover{background:var(--navy);color:white}.topic-card{display:flex;gap:14px;align-items:flex-start}.topic-icon{width:52px;height:52px;border-radius:18px;background:linear-gradient(135deg,var(--purple),var(--orange-2));display:grid;place-items:center;font-size:25px;flex:none}.progress{height:10px;background:#edf0f7;border-radius:999px;overflow:hidden}.progress i{display:block;height:100%;background:linear-gradient(90deg,var(--orange),var(--purple));border-radius:inherit}.rating-line{display:flex;align-items:center;gap:12px;margin:14px 0}.stars{letter-spacing:2px;color:#ff9a2f;white-space:nowrap}.bar{height:12px;background:#edf0f7;border-radius:999px;flex:1;overflow:hidden}.bar i{display:block;height:100%;background:linear-gradient(90deg,var(--navy-2),var(--purple));border-radius:999px}.circle-card{text-align:left}.circle-card .avatar-strip{display:flex;margin:14px 0}.avatar-strip span{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--orange),var(--purple));border:3px solid #fff;margin-right:-8px}.challenge{display:grid;grid-template-columns:.9fr 1.1fr;gap:28px;align-items:center;background:linear-gradient(135deg,#15233e,#28406d);color:white;border-radius:36px;padding:32px;box-shadow:var(--shadow)}.challenge h2,.challenge h3{color:white}.challenge p{color:#dce4ff}.timeline{display:grid;gap:12px}.timeline-item{display:flex;gap:12px;align-items:flex-start;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.14);padding:14px;border-radius:20px}.timeline-item b{background:var(--orange);color:white;border-radius:12px;padding:4px 8px;font-size:13px}.review-card{display:flex;gap:14px;align-items:flex-start}.avatar{width:48px;height:48px;border-radius:18px;background:linear-gradient(135deg,var(--orange-2),var(--purple));display:grid;place-items:center;color:#fff;font-weight:900;flex:none}.quote{position:relative;padding:16px;background:#fff;border:1px solid var(--line);border-radius:22px}.quote::before{content:"";position:absolute;left:-8px;top:18px;width:16px;height:16px;background:#fff;border-left:1px solid var(--line);border-bottom:1px solid var(--line);transform:rotate(45deg)}.feed{display:grid;gap:16px}.feed-item{display:grid;grid-template-columns:auto 1fr;gap:14px;padding:18px;background:#fff;border:1px solid var(--line);border-radius:24px}.feed-meta{display:flex;gap:10px;flex-wrap:wrap;color:var(--muted);font-size:13px}.join-box{border-radius:38px;background:linear-gradient(135deg,var(--cream-2),#fff,var(--purple-2));border:1px solid var(--line);padding:38px;text-align:center;box-shadow:var(--shadow)}.faq{display:grid;gap:14px}.faq details{background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px}.faq summary{cursor:pointer;font-weight:900;color:var(--navy)}.page-hero{padding:64px 0 34px;background:radial-gradient(circle at 12% 10%,rgba(255,138,61,.18),transparent 30%),radial-gradient(circle at 88% 0%,rgba(185,167,255,.26),transparent 28%)}.breadcrumb{display:flex;gap:8px;color:var(--muted);font-weight:700;font-size:14px;margin-bottom:16px}.feature-list{display:grid;gap:12px}.feature-list li{list-style:none;background:#fff;border:1px solid var(--line);border-radius:18px;padding:13px 15px}.feature-list li::before{content:"✓";color:#fff;background:var(--orange);border-radius:50%;display:inline-grid;place-items:center;width:22px;height:22px;margin-right:8px;font-weight:900}.tabs{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:22px}.tab{border:1px solid var(--line);background:#fff;border-radius:999px;padding:9px 14px;font-weight:900;color:var(--navy);cursor:pointer}.tab.active{background:var(--navy);color:#fff}.table-card{overflow-x:auto}.rank-table{width:100%;border-collapse:collapse;min-width:660px}.rank-table th,.rank-table td{padding:14px;border-bottom:1px solid var(--line);text-align:left}.rank-table th{color:var(--navy);background:var(--cream-2)}.rank-no{font-weight:900;color:var(--orange)}.video-card{display:grid;grid-template-columns:140px 1fr;gap:18px;align-items:center}.video-thumb{height:104px;border-radius:20px;background:linear-gradient(135deg,var(--navy),var(--purple));display:grid;place-items:center;color:white;font-size:34px;position:relative}.video-thumb::after{content:"▶";width:46px;height:46px;border-radius:50%;background:rgba(255,255,255,.92);color:var(--orange);display:grid;place-items:center;font-size:20px}.contact-panel{display:grid;grid-template-columns:1fr 1fr;gap:22px}.contact-form{display:grid;gap:13px}.contact-form input,.contact-form textarea{width:100%;border:1px solid var(--line);border-radius:16px;padding:13px;background:#fff;color:var(--ink)}.contact-form textarea{min-height:130px;resize:vertical}.site-footer{margin-top:30px;padding:48px clamp(18px,4vw,58px);background:#101d34;color:white}.site-footer h2,.site-footer h3{margin:0 0 10px;color:white}.site-footer p,.site-footer a,.site-footer span{color:#cdd6ef}.footer-grid{display:grid;grid-template-columns:1.25fr 1fr .8fr 1fr;gap:28px;align-items:start}.site-footer a{display:block;margin:7px 0}.domain-box{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);border-radius:24px;padding:18px}.domain-box strong{display:block;color:white;font-size:20px;word-break:break-all;margin:6px 0 12px}.update{font-weight:900;color:#fff!important}.notice{border-left:5px solid var(--orange);background:#fff;border-radius:18px;padding:16px;margin:18px 0;color:#4c566f}.image-inline{border-radius:28px;border:1px solid var(--line);box-shadow:var(--shadow);background:#fff;padding:12px}.split{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center}.kbd{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;background:#f2f4fa;border:1px solid var(--line);border-radius:8px;padding:2px 6px;color:var(--navy)}
@media (max-width:980px){.hero-grid,.challenge,.split,.contact-panel{grid-template-columns:1fr}.grid-3{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr 1fr}.hero{padding-top:44px}.section{padding:52px 0}.video-card{grid-template-columns:1fr}.video-thumb{height:150px}}
@media (max-width:760px){.site-header{align-items:flex-start}.nav-toggle{display:block}.site-nav{display:none;position:absolute;left:18px;right:18px;top:74px;background:#fff;border:1px solid var(--line);border-radius:24px;padding:12px;box-shadow:var(--shadow);justify-content:flex-start}.site-nav.open{display:flex}.site-nav a{width:100%}.grid-3,.grid-2,.stats-row,.footer-grid{grid-template-columns:1fr}.section-head{display:block}.hero-card,.join-box,.challenge{padding:22px}.floating-badge{position:static;margin-top:12px}.page-hero h1{font-size:38px}.list-cover{height:132px}.brand em{display:none}}