:root{--bg: #f4f5f7;--card: #ffffff;--ink: #1a1d23;--ink2: #3a3f48;--muted: #5b6270;--line: #e3e6eb;--line2: #eef0f3;--blue: #2f6feb;--blue-d: #1f55c4;--blue-s: #e8f0fe;--blue-t: #1f4fb8;--orange: #c2410c;--orange-t: #9a3412;--orange-s: #fdefe6;--green: #1f7a4d;--green-s: #e3f3ea;--life: #e8913a;--radius: 14px;--font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:15px}a{color:var(--blue);text-decoration:none}button,input,select,textarea{font:inherit;color:inherit}h1{margin:0;font-size:26px;font-weight:700}h2{margin:0;font-size:17px;font-weight:700}.muted{color:var(--muted)}.small{font-size:12px}.warn{color:var(--orange-t)}.ok{color:var(--green)}.shell{min-height:100vh}.main{max-width:760px;margin:0 auto;padding:20px 16px 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