*,*::before,*::after{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:#0f172a;background:#f8fafc;line-height:1.7}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button,input,textarea{font:inherit}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.site-header{position:sticky;top:0;z-index:50;background:rgba(248,250,252,.88);backdrop-filter:blur(18px);border-bottom:1px solid rgba(15,23,42,.08)}.top-nav{max-width:1180px;margin:auto;padding:18px 22px 10px;display:flex;align-items:center;justify-content:space-between;gap:28px}.brand-logo{display:flex;align-items:center;gap:12px}.brand-logo img{height:42px;width:auto}.nav-menu{list-style:none;display:flex;gap:6px;align-items:center;margin:0;padding:0}.nav-menu a{display:block;padding:10px 14px;border-radius:999px;color:#475569;font-size:15px;transition:all .22s ease}.nav-menu a:hover,.nav-menu a.active{background:#0f172a;color:#fff;transform:translateY(-1px)}.nav-toggle{display:none;border:1px solid rgba(15,23,42,.12);border-radius:999px;background:#fff;padding:8px 14px;color:#0f172a}.search-box{max-width:1180px;margin:0 auto 16px;padding:0 22px;display:grid;grid-template-columns:1fr auto;gap:10px}.search-box input{width:100%;border:1px solid rgba(15,23,42,.1);border-radius:18px;background:#fff;padding:14px 18px;box-shadow:0 10px 28px rgba(15,23,42,.04);outline:none}.search-box input:focus{border-color:#0f172a;box-shadow:0 0 0 4px rgba(15,23,42,.08)}.search-box button,.primary-btn,.secondary-btn{border:0;border-radius:18px;background:#0f172a;color:#fff;padding:14px 20px;cursor:pointer;box-shadow:0 16px 40px rgba(15,23,42,.18);transition:transform .22s ease,box-shadow .22s ease}.search-box button:hover,.primary-btn:hover,.secondary-btn:hover{transform:translateY(-2px);box-shadow:0 20px 50px rgba(15,23,42,.24)}.search-hint{grid-column:1/-1;margin:0;color:#64748b;font-size:13px}.main{max-width:1180px;margin:auto;padding:0 22px 80px}.hero{display:grid;grid-template-columns:1.08fr .92fr;gap:38px;align-items:center;padding:86px 0 72px}.eyebrow{display:inline-flex;gap:8px;align-items:center;border:1px solid rgba(15,23,42,.08);border-radius:999px;background:#fff;padding:8px 12px;color:#475569;font-size:14px}.eyebrow::before{content:"";width:8px;height:8px;border-radius:50%;background:#38bdf8;box-shadow:0 0 0 6px rgba(56,189,248,.14)}h1{font-size:clamp(42px,7vw,76px);line-height:1.05;margin:22px 0 18px;letter-spacing:-.055em}h2{font-size:clamp(26px,4vw,42px);line-height:1.18;margin:0 0 12px;letter-spacing:-.035em}h3{font-size:22px;margin:0 0 10px}.lead{font-size:18px;color:#475569;max-width:720px}.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:32px}.secondary-btn{background:#fff;color:#0f172a;border:1px solid rgba(15,23,42,.1);box-shadow:0 14px 34px rgba(15,23,42,.08)}.hero-panel{position:relative;border:1px solid rgba(15,23,42,.08);border-radius:42px;background:linear-gradient(145deg,#fff,#eef6ff);padding:18px;box-shadow:0 34px 80px rgba(15,23,42,.13);overflow:hidden}.hero-panel::after{content:"";position:absolute;inset:auto -20% -25% 20%;height:42%;background:radial-gradient(circle,rgba(56,189,248,.25),transparent 65%)}.video-shell{position:relative;border-radius:30px;overflow:hidden;background:#0f172a}.video-shell video,.video-shell img{width:100%;aspect-ratio:16/10;object-fit:cover}.play-badge{position:absolute;inset:0;display:grid;place-items:center;opacity:0;transition:opacity .22s ease;background:linear-gradient(180deg,rgba(15,23,42,.08),rgba(15,23,42,.38))}.video-card:hover .play-badge,.hero-panel:hover .play-badge{opacity:1}.play-badge span{width:76px;height:76px;border-radius:50%;display:grid;place-items:center;background:rgba(255,255,255,.9);box-shadow:0 18px 55px rgba(15,23,42,.28)}.play-badge span::before{content:"";border-left:20px solid #0f172a;border-top:13px solid transparent;border-bottom:13px solid transparent;margin-left:5px}.stats{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}.stats span,.tag{display:inline-flex;align-items:center;gap:6px;border:1px solid rgba(15,23,42,.08);border-radius:999px;background:#fff;padding:7px 10px;color:#475569;font-size:13px}.section{padding:70px 0;border-top:1px solid rgba(15,23,42,.08)}.section-head{display:flex;align-items:end;justify-content:space-between;gap:26px;margin-bottom:28px}.section-head p{max-width:650px;color:#64748b;margin:0}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card,.topic-card,.review,.faq-item,.panel{border:1px solid rgba(15,23,42,.08);border-radius:28px;background:rgba(255,255,255,.82);padding:22px;box-shadow:0 16px 45px rgba(15,23,42,.05);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease}.card:hover,.topic-card:hover,.review:hover,.faq-item:hover,.panel:hover{transform:translateY(-4px);box-shadow:0 22px 70px rgba(15,23,42,.09);border-color:rgba(15,23,42,.16)}.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.topic-card{padding:12px}.topic-card .content{padding:16px 10px 8px}.topic-card h3{font-size:19px}.meta{display:flex;justify-content:space-between;gap:10px;color:#64748b;font-size:13px;margin:12px 0}.board-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.board-card p,.card p,.review p{color:#64748b}.numbers{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.number{padding:26px;border-radius:28px;background:#0f172a;color:#fff}.number strong{display:block;font-size:34px;letter-spacing:-.04em}.number span{color:#cbd5e1}.reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.review .name{font-weight:800;color:#0f172a}.review .role{color:#64748b;font-size:13px}.faq-list{display:grid;gap:12px}.faq-item{padding:0}.faq-item summary{cursor:pointer;font-weight:800;padding:20px 22px;list-style:none}.faq-item summary::-webkit-details-marker{display:none}.faq-item p{margin:0;padding:0 22px 22px;color:#64748b}.join{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:stretch}.join-form{display:grid;gap:12px}.join-form input,.join-form textarea{border:1px solid rgba(15,23,42,.1);border-radius:18px;padding:14px 16px;background:#fff;outline:none}.join-form textarea{min-height:120px}.columns{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}.column-link{padding:18px;border-radius:24px;background:#fff;border:1px solid rgba(15,23,42,.08);color:#475569}.column-link strong{display:block;color:#0f172a;margin-bottom:4px}.site-footer{background:#0f172a;color:#cbd5e1;padding:58px 22px 30px}.footer-grid{max-width:1180px;margin:auto;display:grid;grid-template-columns:1.4fr .8fr 1fr;gap:32px}.site-footer h2{font-size:17px;color:#fff}.site-footer a{display:block;color:#e2e8f0;margin:8px 0}.footer-logo{margin-bottom:16px}.copyright{max-width:1180px;margin:32px auto 0;color:#94a3b8;border-top:1px solid rgba(255,255,255,.1);padding-top:22px}.breadcrumb{padding:28px 0 0;color:#64748b;font-size:14px}.breadcrumb a{color:#0f172a}.page-hero{padding:70px 0 52px}.content-grid{display:grid;grid-template-columns:1fr 340px;gap:28px}.rich-content{font-size:17px}.rich-content p{color:#475569}.notice{border-left:4px solid #38bdf8;background:#eff6ff;padding:18px 20px;border-radius:18px;color:#334155}.share-list{display:flex;flex-wrap:wrap;gap:10px}.share-list button{border:1px solid rgba(15,23,42,.1);background:#fff;border-radius:999px;padding:10px 14px;cursor:pointer}.mini-list{display:grid;gap:12px}.mini-list a{padding:14px 16px;border-radius:18px;background:#fff;border:1px solid rgba(15,23,42,.08)}@media (max-width:960px){.hero,.join,.content-grid{grid-template-columns:1fr}.topic-grid,.cards,.board-grid,.reviews{grid-template-columns:repeat(2,1fr)}.columns,.numbers{grid-template-columns:repeat(2,1fr)}.nav-toggle{display:block}.nav-menu{display:none;position:absolute;left:22px;right:22px;top:74px;background:#fff;border:1px solid rgba(15,23,42,.1);border-radius:24px;padding:14px;box-shadow:0 30px 70px rgba(15,23,42,.14)}.nav-menu.open{display:grid}.nav-menu a{padding:12px 14px}.top-nav{position:relative}}@media (max-width:640px){.main{padding:0 16px 60px}.top-nav,.search-box{padding-left:16px;padding-right:16px}.search-box{grid-template-columns:1fr}.hero{padding:54px 0}.topic-grid,.cards,.board-grid,.reviews,.columns,.numbers{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.section-head{display:block}.hero-actions{display:grid}.primary-btn,.secondary-btn{text-align:center}.number strong{font-size:28px}}
