:root{--void: #07100f;--ink: #dce7e4;--muted: #718581;--cyan: #a8f5e3;--violet: #3f8edc;--rose: #f7253d;--lime: #00b45a;--sun: #ffc400;--line: rgba(168, 245, 227, .2);--header-h: 7rem;--side: clamp(1.4rem, 4vw, 4.8rem);--display: "方正兰亭黑粗体（精选）", "方正兰亭黑粗体", "Microsoft YaHei", "微软雅黑", system-ui, sans-serif;--mono: "方正兰亭黑简体（精选）", "方正兰亭黑简体", "Microsoft YaHei", "微软雅黑", system-ui, sans-serif}*,*:before,*:after{box-sizing:border-box}html{color-scheme:dark;overflow-x:hidden;scroll-behavior:smooth;scroll-snap-type:y proximity;scrollbar-width:thin;scrollbar-color:rgba(125,249,255,.5) transparent;background:radial-gradient(circle at 14% 18%,rgba(39,82,108,.2),transparent 25rem),radial-gradient(circle at 84% 76%,rgba(46,71,116,.18),transparent 28rem),linear-gradient(145deg,#060c12,#081117 48%,#050b12)}body{margin:0;min-width:320px;overflow-x:hidden;background:radial-gradient(circle at 14% 18%,rgba(39,82,108,.2),transparent 25rem),radial-gradient(circle at 84% 76%,rgba(46,71,116,.18),transparent 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strong{color:var(--ink);font-family:var(--display);font-size:clamp(1.8rem,4vw,4rem);font-weight:400}.loader__track{position:absolute;right:var(--side);bottom:3.5rem;left:var(--side);height:1px;overflow:hidden;background:#ffffff24}.loader__track i{display:block;width:0;height:100%;background:var(--cyan);box-shadow:0 0 10px var(--cyan)}body.is-ready .loader{visibility:hidden;opacity:0}.site-header{position:fixed;z-index:50;top:0;left:0;width:100%;min-height:var(--header-h);padding:2.2rem var(--side);display:grid;grid-template-columns:1fr auto 1fr;align-items:start;pointer-events:none}.site-header a,.site-header button{pointer-events:auto}.brand{position:relative;isolation:isolate;justify-self:start;display:inline-flex;align-items:center;gap:.8rem;font-family:var(--display);font-size:.68rem;letter-spacing:.12em}.brand:before{content:"";position:absolute;z-index:-1;inset:-.72rem -1.25rem -.72rem -.8rem;border-radius:999px;background:linear-gradient(90deg,rgba(5,10,16,.96),rgba(5,10,16,.82) 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i{color:#52676d;font-size:.44rem;font-style:normal;letter-spacing:.1em}.top-nav__contact{color:var(--cyan)!important}.header-actions{position:relative;z-index:2;justify-self:end;display:inline-flex;align-items:center;gap:1rem}.menu-toggle{position:relative;width:2.55rem;height:2.55rem;display:none;place-items:center;cursor:pointer;border:1px solid rgba(190,239,245,.24);border-radius:50%;background:#03080ca3;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.menu-toggle span{position:absolute;width:.85rem;height:1px;background:var(--ink);transition:transform .25s ease}.menu-toggle span:first-child{transform:translateY(-.18rem)}.menu-toggle span:last-child{transform:translateY(.18rem)}body.nav-open .menu-toggle span:first-child{transform:rotate(45deg)}body.nav-open .menu-toggle span:last-child{transform:rotate(-45deg)}.sound-toggle{justify-self:end;display:inline-flex;align-items:center;gap:.7rem;padding:.55rem .7rem;cursor:pointer;color:#a8bcc2;border:1px solid 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.chapter-mark{right:auto;left:var(--side)}.scroll-cue{position:absolute;right:var(--side);bottom:3.1rem;display:flex;align-items:center;gap:.9rem;color:#6f858d;font-size:.52rem;letter-spacing:.14em}.scroll-cue>i{position:relative;width:2.4rem;height:2.4rem;display:grid;place-items:center;border:1px solid rgba(125,249,255,.25);border-radius:50%}.scroll-cue b{width:2px;height:.55rem;background:var(--cyan);animation:scroll-cue 1.3s ease-in-out infinite}@keyframes scroll-cue{0%,to{transform:translateY(-.25rem);opacity:.3}50%{transform:translateY(.25rem);opacity:1}}.media-orbit{position:fixed;inset:0;z-index:22;overflow:hidden;pointer-events:none;perspective:1050px;perspective-origin:50% 48%;transform-style:preserve-3d}.media-node{--card-opacity: 0;--card-yaw: 0deg;--card-depth: 0;--card-accent: 116 230 216;--card-secondary: 116 92 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2rem}.site-footer__codes{flex-wrap:wrap}}@media(max-width:360px){.brand__mark{width:7rem;height:1.85rem}.menu-toggle{width:2.25rem;height:2.25rem}.top-nav>a,.runtime-nav__trigger{font-size:.74rem}.scroll-cue{left:.8rem}.site-footer__codes{gap:.6rem}.site-footer__qr{width:min(7rem,38vw)}}@media(max-width:900px)and (max-height:560px)and (orientation:landscape){.site-header{min-height:3.8rem;padding-top:.65rem}.brand__mark{width:7.4rem;height:1.9rem}.top-nav{top:3.7rem}.media-card{width:min(42vw,17rem)}.scroll-cue{bottom:.7rem;transform:scale(.88);transform-origin:left bottom}}