:root{--yd-blue:#3b66f5;--yd-blue-dark:#2a52e0;--yd-blue-deep:#1e3fb8;--yd-blue-soft:#eaf0ff;--yd-blue-mist:#f4f7ff;--yd-ink:#152238;--yd-ink-2:#3a4660;--yd-muted:#7b8498;--yd-muted-2:#9aa3b5;--yd-line:#e5eaf2;--yd-line-soft:#eef2f8;--yd-bg:#fff;--yd-bg-soft:#f7f9fc;--yd-footer:#0c1220;--yd-footer-2:#151d2e;--yd-success:#16a34a;--yd-warning:#f0b429;--yd-radius:14px;--yd-radius-sm:10px;--yd-radius-lg:22px;--yd-shadow:0 14px 40px #1e46aa1a;--yd-shadow-sm:0 4px 14px #192d5a0f;--yd-shadow-lg:0 28px 70px #1e46aa29;--yd-header-h:68px;--yd-ease:cubic-bezier(.22, 1, .36, 1);--font:"Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;--font-brand:"Plus Jakarta Sans", var(--font)}*,:after,:before{box-sizing:border-box}html{scroll-behavior:smooth}body,html{font-family:var(--font);color:var(--yd-ink);background:var(--yd-bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizelegibility;margin:0;padding:0}body{line-height:1.6}::selection{background:#3b66f52e}a{color:inherit;transition:color .15s var(--yd-ease);text-decoration:none}button,input,select,textarea{font:inherit;color:inherit}img{max-width:100%;display:block}:focus-visible{outline-offset:2px;outline:2px solid #3b66f58c}.container{width:min(1160px,100% - 48px);margin:0 auto}.btn{cursor:pointer;letter-spacing:.01em;height:44px;transition:transform .18s var(--yd-ease),background .18s var(--yd-ease),border-color .18s var(--yd-ease),box-shadow .18s var(--yd-ease),color .18s var(--yd-ease);white-space:nowrap;-webkit-user-select:none;user-select:none;border:1px solid #0000;border-radius:999px;justify-content:center;align-items:center;gap:8px;padding:0 22px;font-weight:650;display:inline-flex}.btn:active{transform:translateY(1px)}.btn-primary{background:linear-gradient(180deg,#5a7ff8 0,var(--yd-blue) 100%);color:#fff;box-shadow:0 10px 24px #3b66f547}.btn-primary:hover{background:linear-gradient(180deg,#4d73f6 0,var(--yd-blue-dark) 100%);box-shadow:0 14px 28px #3b66f557}.btn-ghost{color:var(--yd-blue);box-shadow:var(--yd-shadow-sm);background:#ffffffe0;border-color:#3b66f559}.btn-ghost:hover{background:var(--yd-blue-soft);border-color:var(--yd-blue)}.btn-lg{height:52px;padding:0 28px;font-size:16px}.btn:disabled{opacity:.55;cursor:not-allowed;box-shadow:none;transform:none}.section{padding:96px 0;position:relative}.section-title{text-align:center;color:var(--yd-ink);letter-spacing:-.02em;margin:0 0 12px;font-size:calc(clamp(28px,3.2vw,36px));font-weight:780;line-height:1.25}.section-sub{text-align:center;max-width:680px;color:var(--yd-muted);margin:0 auto 44px;font-size:16px;line-height:1.75}.tag-pill{background:var(--yd-blue-soft);color:var(--yd-blue);letter-spacing:.02em;border-radius:999px;align-items:center;gap:6px;padding:6px 12px;font-size:12px;font-weight:700;display:inline-flex}.card{border-radius:var(--yd-radius);box-shadow:var(--yd-shadow-sm);transition:transform .22s var(--yd-ease),box-shadow .22s var(--yd-ease),border-color .22s var(--yd-ease);background:#fff;border:1px solid #e5eaf2f2}.card-hover:hover{box-shadow:var(--yd-shadow);border-color:#3b66f538;transform:translateY(-3px)}.page-hero{text-align:center;background:radial-gradient(720px 320px at 50% -10%,#5484ff38,#0000 70%),radial-gradient(480px 240px at 90% 20%,#2dd4bf14,#0000 60%),linear-gradient(#eaf1ff,#f7f9ff 48%,#fff);padding:72px 0 40px;position:relative;overflow:hidden}.page-hero:before{content:"";pointer-events:none;background-image:linear-gradient(#3b66f509 1px,#0000 0),linear-gradient(90deg,#3b66f509 1px,#0000 0);background-size:48px 48px;position:absolute;inset:0;-webkit-mask-image:linear-gradient(#000 20%,#0000 85%);mask-image:linear-gradient(#000 20%,#0000 85%)}.page-hero h1{letter-spacing:-.025em;color:#16356b;margin:0 0 14px;font-size:calc(clamp(30px,4vw,42px));font-weight:780;line-height:1.2;position:relative}.page-hero p{max-width:720px;color:var(--yd-ink-2);margin:0 auto;font-size:16px;line-height:1.8;position:relative}.page-hero .actions{flex-wrap:wrap;justify-content:center;gap:12px;margin-top:28px;display:flex;position:relative}.surface-grid{background-image:radial-gradient(ellipse at top,#3b66f50f,transparent 55%),linear-gradient(180deg,#fff,var(--yd-bg-soft))}.fade-up{animation:fade-up .7s var(--yd-ease) both}@keyframes fade-up{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}@keyframes float-y{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}@keyframes soft-pulse{0%,to{box-shadow:0 0 #3b66f540}50%{box-shadow:0 0 0 10px #3b66f500}}@media (width<=860px){.container{width:min(1160px,100% - 32px)}.section{padding:64px 0}.page-hero{padding:56px 0 32px}}