:root{--bg:#102238;--bg-soft:#172d48;--panel:#1b3855;--line:rgba(178,211,235,.2);--line-bright:rgba(92,219,255,.5);--text:#f5f9fc;--muted:#b0c1cf;--cyan:#62dcf7;--blue:#6f9cff;--container:1240px;--wide-container:1600px;--radius:2px;--ease:cubic-bezier(.2,.8,.2,1)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.6;overflow-x:hidden}a{color:inherit;text-decoration:none}button{font:inherit}img{max-width:100%;display:block}.container{width:min(calc(100% - 80px),var(--container));margin:0 auto}@media(min-width:1440px){.container{width:min(84vw,var(--wide-container));}}@media(min-width:2200px){.container{width:min(86vw,1920px);}}.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}.eyebrow{display:flex;align-items:center;gap:10px;margin:0 0 22px;color:var(--cyan);font-size:11px;letter-spacing:.18em;font-weight:700}.status-dot{width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 14px var(--cyan)}.section-frame{position:relative;overflow:hidden}.button{display:inline-flex;align-items:center;gap:18px;min-height:50px;padding:0 20px;border:1px solid transparent;font-size:13px;font-weight:700;letter-spacing:.04em;transition:transform .25s var(--ease),background .25s,border-color .25s}.button:hover{transform:translateY(-3px)}.button-primary{background:var(--cyan);color:#06101d}.button-primary:hover{background:#9aeaff}.text-link{display:inline-flex;align-items:center;gap:15px;color:var(--text);font-size:12px;font-weight:700;letter-spacing:.06em}.text-link span{color:var(--cyan);font-size:17px;transition:transform .25s}.text-link:hover span{transform:translate(3px,-3px)}.site-header{position:absolute;z-index:10;top:0;left:0;width:100%;border-bottom:1px solid var(--line)}.header-inner{height:82px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:12px}.brand-logo{display:block;width:32px;height:32px;padding:3px;background:#fff;border-radius:6px}.brand-copy{display:flex;flex-direction:column;line-height:1}.brand-copy strong{font-size:16px;letter-spacing:.12em}.brand-copy small{margin-top:5px;color:var(--muted);font-size:8px;letter-spacing:.22em}.site-nav{display:flex;align-items:center;gap:34px;font-size:12px;color:#b8c8d6}.site-nav a{transition:color .2s}.site-nav a:hover,.site-nav a:focus-visible{color:var(--cyan)}.site-nav .nav-action{display:flex;gap:12px;align-items:center;color:var(--text);border-left:1px solid var(--line);padding-left:24px}.nav-action span{color:var(--cyan);font-size:17px}.menu-toggle{display:none;background:transparent;border:0;padding:10px;color:var(--text)}.menu-toggle span{display:block;width:24px;height:1px;margin:5px 0;background:var(--text)}:focus-visible{outline:2px solid var(--cyan);outline-offset:4px}@media(max-width:760px){.container{width:min(calc(100% - 40px),var(--container))}.header-inner{height:70px}.menu-toggle{display:block;z-index:2}.site-nav{display:none;position:absolute;top:70px;left:0;width:100%;padding:20px;flex-direction:column;align-items:stretch;gap:0;background:rgba(16,34,56,.97);border-bottom:1px solid var(--line)}.site-nav.is-open{display:flex}.site-nav a{padding:14px 0;border-bottom:1px solid var(--line)}.site-nav .nav-action{border-left:0;padding-left:0;border-bottom:0;margin-top:4px}.brand-copy strong{font-size:14px}}.back-to-top{position:fixed;z-index:20;top:50%;right:clamp(18px,2.5vw,40px);display:grid;place-items:center;width:48px;height:48px;border:1px solid var(--line-bright);border-radius:var(--radius);background:rgba(16,34,56,.92);color:var(--cyan);font-size:20px;line-height:1;opacity:0;visibility:hidden;pointer-events:none;transform:translateY(-50%);transition:opacity .25s,visibility .25s,background .25s,border-color .25s,color .25s,transform .25s}.back-to-top.is-visible{opacity:1;visibility:visible;pointer-events:auto}.back-to-top:hover{background:var(--cyan);border-color:var(--cyan);color:#06101d;transform:translateY(calc(-50% - 3px))}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}
