:root{--accent-orange: #e82d00;--accent-orange-soft: rgba(232, 45, 0, .12);--bg: #f4f4f5;--card: #ffffff;--text: #222222;--muted: #666666;--line: #e5e7eb;--accent: #111827;--soft: #f1f1f1;--shadow: 0 4px 14px rgba(0, 0, 0, .04)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Arial,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text)}a{color:inherit}.site-hero{padding:38px 20px 24px;text-align:center;background:#fff;border-bottom:1px solid var(--line)}.site-hero h1{margin:0 0 10px;font-size:32px}.site-hero p{margin:0;color:var(--muted);line-height:1.7}.top-nav{position:sticky;top:0;z-index:50;display:flex;justify-content:center;gap:10px;padding:12px 16px;background:#fffffff0;border-bottom:1px solid var(--line);backdrop-filter:blur(12px);flex-wrap:wrap}.top-nav a{text-decoration:none;color:var(--text);font-size:14px;padding:8px 14px;border-radius:999px;background:var(--soft)}.top-nav a:hover{background:var(--accent);color:#fff}.mobile-nav-handle{display:none}.site-footer{padding:24px;text-align:center;color:#888;font-size:13px}@media(max-width:860px){body.nav-drawer .site-hero{padding-top:62px}body.nav-drawer .top-nav{position:fixed;top:0;left:0;right:0;z-index:90;transform:translateY(-110%);opacity:0;pointer-events:none;transition:transform .22s ease,opacity .22s ease;box-shadow:0 10px 26px #00000014}body.nav-drawer.mobile-nav-open .top-nav{transform:translateY(0);opacity:1;pointer-events:auto}body.nav-drawer .mobile-nav-handle{display:block;position:fixed;top:0;left:50%;z-index:100;transform:translate(-50%);border:1px solid var(--line);border-top:none;border-radius:0 0 999px 999px;padding:6px 18px 8px;background:#fffffff5;color:var(--accent);font-size:13px;box-shadow:0 8px 20px #0000001a}body.nav-drawer.mobile-nav-open .mobile-nav-handle{display:none}body.nav-home .top-nav{transition:transform .22s ease,opacity .22s ease;will-change:transform}body.nav-home.mobile-nav-collapsed .top-nav{transform:translateY(-115%);opacity:0;pointer-events:none}body.nav-home .mobile-nav-handle{display:none;position:fixed;top:0;left:50%;z-index:100;transform:translate(-50%);border:1px solid var(--line);border-top:none;border-radius:0 0 999px 999px;padding:6px 18px 8px;background:#fffffff5;color:var(--accent);font-size:13px;box-shadow:0 8px 20px #0000001a}body.nav-home.mobile-nav-collapsed .mobile-nav-handle{display:block}}body.nav-orange-slider-preview{--orange-nav-count: 6;--orange-nav-index: 0;--nav-item-text: #5e5f55;--nav-item-active: #111827}body.nav-orange-slider-preview .top-nav{position:sticky;top:14px;width:min(920px,calc(100% - 32px));margin:0 auto;padding:0;gap:0;display:flex;flex-wrap:nowrap;justify-content:stretch;align-items:stretch;border:0;border-radius:8px;background:transparent;box-shadow:0 16px 42px #1118271a;isolation:isolate;overflow:visible}body.nav-orange-slider-preview .top-nav:after{content:"";position:absolute;top:-6px;bottom:-6px;left:calc(var(--orange-nav-index, 0) * (100% / var(--orange-nav-count, 6)));width:calc(100% / var(--orange-nav-count, 6));border-radius:8px;background:var(--accent-orange);z-index:0;transition:left .34s cubic-bezier(.2,.8,.2,1),width .24s ease}body.nav-orange-slider-preview .top-nav:before{content:"";position:absolute;top:0;left:calc((var(--orange-nav-index, 0) + .5) * (100% / var(--orange-nav-count, 6)));width:0;height:0;margin-left:-6px;border:7px solid transparent;border-top-color:var(--accent-orange);z-index:3;transition:left .34s cubic-bezier(.2,.8,.2,1)}body.nav-orange-slider-preview .top-nav a{position:relative;z-index:2;flex:1 1 0;min-width:0;display:flex;align-items:center;justify-content:center;min-height:50px;padding:14px 10px;border-radius:0;background:#fff;color:var(--nav-item-text);font-weight:700;letter-spacing:.02em;text-decoration:none;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;box-shadow:inset -1px 0 #1118270f;transition:color .2s ease,background .2s ease,transform .2s ease}body.nav-orange-slider-preview .top-nav a:first-child{border-radius:8px 0 0 8px}body.nav-orange-slider-preview .top-nav a:last-child{border-radius:0 8px 8px 0;box-shadow:none}body.nav-orange-slider-preview .top-nav a:hover,body.nav-orange-slider-preview .top-nav a:focus-visible,body.nav-orange-slider-preview .top-nav a.is-current{color:var(--nav-item-active);background:#fff;outline:none}body.nav-orange-slider-preview .top-nav a:active{transform:translateY(1px)}body.nav-orange-slider-preview .site-hero{padding-top:52px}@supports selector(.top-nav:has(a:hover)){body.nav-orange-slider-preview .top-nav:has(a:nth-child(1):hover),body.nav-orange-slider-preview .top-nav:has(a:nth-child(1):focus-visible){--orange-nav-index: 0}body.nav-orange-slider-preview .top-nav:has(a:nth-child(2):hover),body.nav-orange-slider-preview .top-nav:has(a:nth-child(2):focus-visible){--orange-nav-index: 1}body.nav-orange-slider-preview .top-nav:has(a:nth-child(3):hover),body.nav-orange-slider-preview .top-nav:has(a:nth-child(3):focus-visible){--orange-nav-index: 2}body.nav-orange-slider-preview .top-nav:has(a:nth-child(4):hover),body.nav-orange-slider-preview .top-nav:has(a:nth-child(4):focus-visible){--orange-nav-index: 3}body.nav-orange-slider-preview .top-nav:has(a:nth-child(5):hover),body.nav-orange-slider-preview .top-nav:has(a:nth-child(5):focus-visible){--orange-nav-index: 4}body.nav-orange-slider-preview .top-nav:has(a:nth-child(6):hover),body.nav-orange-slider-preview .top-nav:has(a:nth-child(6):focus-visible){--orange-nav-index: 5}}body.nav-orange-slider-preview .mobile-nav-handle{border-color:#e82d003d}@media(max-width:860px){body.nav-home.nav-orange-slider-preview .top-nav,body.nav-home.nav-orange-slider-preview.mobile-nav-collapsed .top-nav,body.nav-home.nav-orange-slider-preview.mobile-nav-open .top-nav{position:sticky;top:8px;width:calc(100% - 12px);margin:0 auto;transform:none!important;opacity:1!important;pointer-events:auto!important;display:flex;flex-wrap:nowrap;gap:0;padding:0;border:0;border-radius:7px;background:transparent;box-shadow:0 12px 30px #1118271c;overflow:visible}body.nav-home.nav-orange-slider-preview .mobile-nav-handle,body.nav-home.nav-orange-slider-preview.mobile-nav-collapsed .mobile-nav-handle,body.nav-home.nav-orange-slider-preview.mobile-nav-open .mobile-nav-handle{display:none!important}body.nav-orange-slider-preview .top-nav:after{top:-5px;bottom:-5px;border-radius:7px}body.nav-orange-slider-preview .top-nav:before{border-width:6px;margin-left:-6px}body.nav-orange-slider-preview .top-nav a,body.nav-orange-slider-preview .top-nav a:first-child,body.nav-orange-slider-preview .top-nav a:last-child{flex:1 1 0;min-width:0;min-height:40px;padding:9px 2px;border-radius:0;background:#fff;color:var(--nav-item-text);font-size:clamp(10px,2.6vw,13px);line-height:1.1;letter-spacing:0;box-shadow:inset -1px 0 #1118270f;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}body.nav-orange-slider-preview .top-nav a:first-child{border-radius:7px 0 0 7px}body.nav-orange-slider-preview .top-nav a:last-child{border-radius:0 7px 7px 0;box-shadow:none}body.nav-orange-slider-preview .site-hero{padding-top:42px}}