:root{--navy: #16325e;--navy-deep: #0f2547;--sky: #2ea3e8;--sky-soft: #e8f4fd;--sky-line: #cfe8f8;--ink: #22303f;--muted: #64748b;--line: #e6edf3;--bg: #ffffff;--bg-soft: #f6fafd;--radius: 16px;--shadow: 0 8px 30px rgba(22, 50, 94, .08);--font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.75;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}img{max-width:100%}.wrap{max-width:1080px;margin:0 auto;padding:0 24px}.site-header{position:sticky;top:0;z-index:50;background:#ffffffeb;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.site-header .wrap{display:flex;align-items:center;height:68px;gap:28px}.logo{font-size:26px;font-weight:800;font-style:italic;letter-spacing:-.5px;-webkit-user-select:none;user-select:none}.logo .l-sky{color:var(--navy)}.logo .l-tree{color:var(--sky)}.nav{display:flex;gap:4px;margin-left:auto}.nav a{padding:8px 14px;border-radius:999px;font-size:15px;color:var(--muted);transition:.2s;white-space:nowrap}.nav a:hover{color:var(--navy);background:var(--sky-soft)}.nav a.active{color:var(--navy);background:var(--sky-soft);font-weight:600}.burger{display:none;margin-left:auto;font-size:22px;background:none;border:none;cursor:pointer;color:var(--navy)}.hero{background:linear-gradient(135deg,var(--navy-deep) 0%,var(--navy) 55%,#1e4d8c 100%);color:#fff;border-radius:0 0 32px 32px;overflow:hidden;position:relative}.hero .wrap{padding:88px 24px 96px;position:relative;z-index:1}.hero:after{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(46,163,232,.35),transparent 70%)}.hero:before{content:"";position:absolute;left:-80px;bottom:-160px;width:340px;height:340px;border-radius:50%;background:radial-gradient(circle,rgba(46,163,232,.18),transparent 70%)}.hero h1{font-size:clamp(34px,5vw,54px);line-height:1.3;font-weight:800;letter-spacing:1px}.hero h1 .t-sky{color:#fff}.hero h1 .t-tree{color:var(--sky)}.hero p{margin-top:18px;font-size:17px;color:#ffffffd1;max-width:560px}.hero-cta{margin-top:30px;display:flex;gap:14px;flex-wrap:wrap}.btn{display:inline-block;padding:12px 28px;border-radius:999px;font-size:15px;font-weight:600;cursor:pointer;border:none;transition:.2s}.btn-primary{background:var(--sky);color:#fff;box-shadow:0 6px 20px #2ea3e866}.btn-primary:hover{background:#1f96dd;transform:translateY(-1px)}.btn-ghost{background:#ffffff24;color:#fff;border:1px solid rgba(255,255,255,.35)}.btn-ghost:hover{background:#ffffff38}.btn-outline{background:#fff;color:var(--navy);border:1.5px solid var(--sky-line)}.btn-outline:hover{border-color:var(--sky);background:var(--sky-soft)}.btn-dark{background:var(--navy);color:#fff}.btn-dark:hover{background:var(--navy-deep)}.section{padding:72px 0}.section-soft{background:var(--bg-soft)}.sec-head{text-align:center;margin-bottom:44px}.sec-head h2{font-size:30px;color:var(--navy);font-weight:800;letter-spacing:1px}.sec-head p{color:var(--muted);margin-top:10px;font-size:15px}.sec-head .bar{width:48px;height:4px;border-radius:2px;background:linear-gradient(90deg,var(--navy),var(--sky));margin:14px auto 0}.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px 28px;transition:.25s;position:relative;overflow:hidden}.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--sky-line)}.card 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blockquote{border-left:3px solid var(--sky-line);padding:4px 16px;color:var(--muted);margin:16px 0;background:var(--bg-soft);border-radius:0 8px 8px 0}.md-body code{background:var(--sky-soft);padding:2px 8px;border-radius:6px;font-size:14px;color:var(--navy)}.md-body pre{background:var(--navy-deep);color:#dbe7f5;padding:18px;border-radius:12px;overflow:auto;margin:16px 0}.md-body pre code{background:none;color:inherit;padding:0}.md-body a{color:var(--sky)}.md-body a:hover{text-decoration:underline}.md-body hr{border:none;border-top:1px solid var(--line);margin:28px 0}.form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px}.field{margin-bottom:18px}.field label{display:block;font-size:14px;font-weight:600;color:var(--navy);margin-bottom:8px}.field input,.field textarea,.field select{width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit;transition:.2s;background:#fff}.field input:focus,.field 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var(--line);box-shadow:var(--shadow)}.nav.open{display:flex}.burger{display:block}.hero .wrap{padding:64px 24px 72px}.section{padding:52px 0}.admin-side{display:none}.foot-grid{flex-direction:column}}