:root{--abyss: #04070E;--deep: #0A1526;--ais-aqua: #5CE1E6;--ais-blue: #38B6FF;--glacial: #EAF6FF;--verify-pulse: #8CF5EA;--ink-dim: rgba(234, 246, 255, .55);--hud-line: rgba(92, 225, 230, .28);--grad-sign: linear-gradient(120deg, var(--ais-aqua), var(--ais-blue));--font-display: "Panchang", -apple-system, "PingFang SC", "Noto Sans SC", sans-serif;--font-body: "Switzer", -apple-system, "PingFang SC", "Noto Sans SC", sans-serif;--font-mono: "Fragment Mono", ui-monospace, "SF Mono", monospace}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:auto}body{background:var(--abyss);color:var(--glacial);font-family:var(--font-body);font-weight:400;line-height:1.6;overflow-x:hidden;-webkit-font-smoothing:antialiased}::selection{background:#5ce1e64d}.mono{font-family:var(--font-mono)}.kicker{font-size:.72rem;letter-spacing:.22em;text-transform:uppercase;color:var(--ink-dim);margin-bottom:1.1rem}h1,h2{font-family:var(--font-display);font-weight:600;text-transform:uppercase;line-height:1.05;letter-spacing:.01em}h1{font-size:clamp(2.1rem,5.6vw,4.2rem)}h2{font-size:clamp(1.35rem,3.6vw,2.4rem);margin-bottom:1rem}h1 em,h2 em{font-style:normal;background:var(--grad-sign);-webkit-background-clip:text;background-clip:text;color:transparent}html[lang=zh] h1,html[lang=zh] h2{letter-spacing:.06em;font-weight:700}.lang-toggle{position:fixed;right:18px;bottom:18px;z-index:60;display:flex;border:1px solid var(--hud-line);border-radius:999px;overflow:hidden;background:#04070e99;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}.lang-btn{font-family:var(--font-mono);font-size:.72rem;padding:7px 13px;background:none;border:none;color:var(--ink-dim);cursor:pointer}.lang-btn.active{background:var(--glacial);color:var(--abyss)}#hud{position:fixed;right:22px;top:50%;transform:translateY(-50%);z-index:50;height:56vh;display:flex;flex-direction:column;align-items:flex-end;gap:12px;pointer-events:none}.hud-label{font-size:.62rem;letter-spacing:.3em;color:var(--ink-dim)}.hud-rail{position:relative;flex:1;width:9px;background:repeating-linear-gradient(to bottom,var(--hud-line) 0 1px,transparent 1px 14px) right/5px 100% no-repeat,linear-gradient(var(--hud-line),var(--hud-line)) right/1px 100% no-repeat}.hud-marker{position:absolute;right:-3px;top:0;width:15px;height:3px;border-radius:2px;background:var(--grad-sign);box-shadow:0 0 8px #5ce1e6b3}.hud-read{font-size:.68rem;color:var(--glacial);letter-spacing:.08em;white-space:nowrap}.act{position:relative;min-height:100vh;min-height:100svh;display:flex;align-items:center;justify-content:center}.act-inner{position:relative;z-index:10;max-width:680px;padding:0 8vw;text-align:center}.act-inner>p:not(.kicker){color:var(--ink-dim);max-width:54ch;margin-inline:auto}.hero{overflow:hidden}.hero-bg{position:absolute;inset:0;background:radial-gradient(120% 90% at 68% 6%,rgba(56,182,255,.16),transparent 55%),radial-gradient(90% 70% at 30% 20%,rgba(92,225,230,.08),transparent 60%),linear-gradient(180deg,#060B16 0%,var(--abyss) 78%)}.bg-video{width:100%;height:100%;object-fit:cover}.bg-video[hidden]{display:none}.hero-veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(4,7,14,.25) 0%,rgba(4,7,14,.05) 45%,var(--abyss) 100%)}.hero-copy{position:relative;z-index:10;max-width:1040px;padding:0 8vw;text-align:left}.hero-copy .sub{margin-top:1.4rem;max-width:46ch;color:var(--ink-dim);font-size:clamp(.95rem,1.6vw,1.1rem)}.scroll-cue{position:absolute;bottom:34px;left:50%;transform:translate(-50%);z-index:10;display:flex;flex-direction:column;align-items:center;gap:2px;font-size:.68rem;letter-spacing:.34em;color:var(--ink-dim)}.cue-arrow{animation:cue-bob 2.2s ease-in-out infinite;font-size:1rem}@keyframes cue-bob{0%,to{transform:translateY(0);opacity:.5}50%{transform:translateY(6px);opacity:1}}#waterline-zone{height:120vh;background:linear-gradient(180deg,var(--abyss) 0%,var(--deep) 45%,var(--abyss) 100%)}#waterline-overlay{position:fixed;inset:0;z-index:40;pointer-events:none}#deep{position:relative;height:480vh;background:var(--abyss)}.deep-stage{position:sticky;top:0;height:100vh;height:100svh;overflow:hidden}#particle-host{position:absolute;inset:0}#particle-fallback{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.6}#particle-fallback[hidden]{display:none}.deep-copy{position:absolute;z-index:10;top:50%;transform:translateY(-50%);left:8vw;max-width:480px;opacity:0;visibility:hidden}.deep-copy--right{left:auto;right:8vw;text-align:right}.deep-copy p:not(.kicker){color:var(--ink-dim)}.verify-rail{list-style:none;display:flex;justify-content:center;align-items:center;gap:0;margin-bottom:2.2rem}.v-node{font-family:var(--font-mono);font-size:.72rem;color:var(--ink-dim);width:52px;height:52px;border:1px solid var(--hud-line);border-radius:50%;display:flex;align-items:center;justify-content:center}.v-node+.v-node{margin-left:40px;position:relative}.v-node+.v-node:before{content:"";position:absolute;right:100%;top:50%;width:40px;height:1px;background:var(--hud-line)}.v-node.lit{border-color:var(--verify-pulse);color:var(--verify-pulse)}.cta{flex-direction:column;justify-content:center;gap:8vh}.coords{font-size:.72rem;letter-spacing:.22em;color:var(--ink-dim);margin-bottom:1.4rem}.cta-btn{display:inline-block;margin-top:2rem;padding:14px 38px;border-radius:999px;background:var(--grad-sign);color:var(--abyss);font-weight:600;font-size:1rem;text-decoration:none;letter-spacing:.02em}.cta-mail{margin-top:1.1rem;font-size:.78rem;color:var(--ink-dim);letter-spacing:.1em}.cta footer{position:absolute;bottom:26px;left:0;right:0;text-align:center;font-size:.72rem;color:var(--ink-dim);display:flex;flex-direction:column;gap:6px}@media (max-width: 768px){#hud{right:10px;height:40vh;gap:8px}.hud-label{display:none}.hud-read{font-size:.6rem}.deep-copy,.deep-copy--right{left:7vw;right:7vw;max-width:none;text-align:left}.hero-copy{padding-right:14vw}}html.reduced .cue-arrow{animation:none}html.reduced #hud,html.reduced #waterline-overlay{display:none}html.reduced #waterline-zone{height:32vh}html.reduced #deep{height:auto}html.reduced .deep-stage{position:static;height:auto;overflow:visible}html.reduced #particle-host{display:none}html.reduced .deep-copy,html.reduced .deep-copy--right{position:static;transform:none;opacity:1;visibility:visible;padding:16vh 8vw;max-width:680px;margin-inline:auto;text-align:center}@media (prefers-reduced-motion: reduce){.cue-arrow{animation:none}}