:root{color-scheme:light;--bg: #f4f7f2;--bg-deep: #eef4f2;--surface: #ffffff;--surface-strong: #f0f5f3;--text: #102a2c;--muted: #5d6f6b;--primary: #0f766e;--primary-strong: #0a5a54;--accent: #f97316;--border: rgba(15, 118, 110, .18);--shadow: 0 24px 60px rgba(15, 38, 37, .12);--radius: 18px}*{box-sizing:border-box}body{margin:0;font-family:HarmonyOS Sans SC,Source Han Sans SC,Noto Sans SC,PingFang SC,Microsoft YaHei,sans-serif;background:radial-gradient(circle at 10% 10%,#f7fbf5 0%,transparent 55%),radial-gradient(circle at 85% 0%,#e8f6f2 0%,transparent 50%),linear-gradient(180deg,#f9fbf8 0%,#f3f7f4 55%,#f6f4ee 100%);color:var(--text)}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.app-shell{min-height:100vh;display:flex;flex-direction:column}.topbar{position:sticky;top:0;z-index:10;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:rgba(249,251,248,.86);border-bottom:1px solid rgba(15,118,110,.1)}.topbar-inner{max-width:1200px;margin:0 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