*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; -moz-text-size-adjust: 100%; scroll-behavior: smooth; }
body { font-family: var(--font-family); font-size: var(--fs-base); line-height: var(--lh-normal); color: var(--text-primary); background: var(--bg-primary); -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; overflow-x: hidden; }
img, svg, video { display: block; max-width: 100%; }
a { color: var(--color-primary-light); text-decoration: none; transition: color var(--t-fast); }
a:hover { color: var(--color-primary); }
button { font-family: inherit; font-size: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea, select { font-family: inherit; font-size: inherit; color: inherit; background: var(--bg-input); border: 1px solid var(--border-color); border-radius: var(--radius-sm); padding: var(--sp-2) var(--sp-3); outline: none; transition: border-color var(--t-fast), box-shadow var(--t-fast); width: 100%; }
input:focus, textarea:focus, select:focus { border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.15); }
input::placeholder, textarea::placeholder { color: var(--text-muted); }
textarea { resize: vertical; min-height: 80px; }
select { cursor: pointer; appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%238892B0'%3E%3Cpath d='M6 8L1 3h10z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; padding-right: 36px; }
ul, ol { list-style: none; }
table { border-collapse: collapse; width: 100%; }
h1, h2, h3, h4, h5, h6 { font-weight: var(--fw-semibold); line-height: var(--lh-tight); color: var(--text-primary); }
h1 { font-size: var(--fs-3xl); }
h2 { font-size: var(--fs-2xl); }
h3 { font-size: var(--fs-xl); }
h4 { font-size: var(--fs-lg); }
p { color: var(--text-secondary); }
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }
::selection { background: rgba(var(--color-primary-rgb), 0.3); color: var(--text-primary); }