/* ICP 豁免申请工具 · 沿用原站 shadcn/ui 中性色风格 */
:root{
  --background:#ffffff; --foreground:#0a0a0a;
  --card:#ffffff; --muted:#f5f5f5; --muted-fg:#737373;
  --primary:#171717; --primary-fg:#fafafa;
  --border:#e5e5e5; --input:#e5e5e5; --ring:#a1a1a1;
  --success:#16a34a; --destructive:#dc2626;
  --radius:8px;
  --font:"Geist","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;border-color:var(--border)}
html{-webkit-text-size-adjust:100%;scroll-padding-top:72px;caret-color:var(--foreground);scrollbar-color:#d4d4d4 transparent}
::selection{background:#171717;color:#fafafa}
body{margin:0;background:var(--background);color:var(--foreground);font-family:var(--font);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased;min-height:100vh;display:flex;flex-direction:column}
main{flex:1}
a{color:inherit;text-underline-offset:4px}
img,svg{display:block}
button,input,textarea{font:inherit;color:inherit}
h1,h2,h3,p{margin:0}
.ico{width:16px;height:16px;flex:none;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.ico-5{width:20px;height:20px}
.ico-6{width:24px;height:24px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.container{width:100%;max-width:1280px;margin:0 auto;padding:0 16px}
.narrow{max-width:896px}
:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(161,161,161,.5)}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.85);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-bottom:1px solid var(--border)}
.site-header .container{display:flex;align-items:center;justify-content:space-between;height:56px}
.logo{display:flex;align-items:center;gap:10px;font-weight:600;letter-spacing:-.01em;text-decoration:none}
.logo-mark{width:28px;height:28px;border-radius:7px;background:var(--primary);color:var(--primary-fg);display:grid;place-items:center;flex:none}
.logo-mark .ico{width:15px;height:15px}
.nav{display:flex;align-items:center;gap:4px}
.nav a{display:flex;align-items:center;gap:8px;padding:8px 16px;font-size:14px;font-weight:500;line-height:20px;border-radius:var(--radius);text-decoration:none;color:var(--muted-fg);transition:color .15s,background-color .15s}
.nav a:hover{color:var(--foreground);background:var(--muted)}
.nav a[aria-current="page"]{background:var(--primary);color:var(--primary-fg)}
.menu-btn{display:none;width:36px;height:36px;align-items:center;justify-content:center;border:0;background:none;border-radius:var(--radius);cursor:pointer}
.menu-btn:hover{background:var(--muted)}
@media (max-width:767px){
  .menu-btn{display:inline-flex}
  .nav{display:none;position:absolute;top:57px;left:0;right:0;background:#fff;border-bottom:1px solid var(--border);flex-direction:column;align-items:stretch;padding:8px 16px 12px;gap:2px}
  .nav.open{display:flex}
}

/* page head */
.page{padding-top:40px;padding-bottom:64px}
.page-head{margin-bottom:32px;max-width:720px}
.page-head h1{font-size:clamp(26px,3.4vw,36px);line-height:1.2;font-weight:700;letter-spacing:-.025em;text-wrap:balance;word-break:keep-all}
.page-head p{margin-top:10px;color:var(--muted-fg);line-height:1.7;text-wrap:pretty}
.facts{list-style:none;margin:18px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:8px 20px;font-size:13px;color:var(--muted-fg)}
.facts li{display:flex;align-items:center;gap:6px}
.facts .ico{width:14px;height:14px;color:var(--foreground)}
.page-head.center{margin:0 auto 32px;text-align:center}
@media (max-width:640px){.page{padding-top:28px;padding-bottom:48px}.page-head{margin-bottom:24px}}

/* card */
.card{background:var(--card);border:1px solid var(--border);border-radius:14px;box-shadow:0 1px 3px rgba(0,0,0,.1),0 1px 2px -1px rgba(0,0,0,.1);padding:24px 0;display:flex;flex-direction:column;gap:24px}
.card-head{padding:0 24px;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.card-title{display:flex;align-items:center;gap:8px;font-size:16px;font-weight:600;line-height:1.25;white-space:nowrap}
.card-body{padding:0 24px}
.card.muted{background:rgba(245,245,245,.5)}
.stack{display:grid;gap:24px}
@media (max-width:640px){.card{padding:20px 0;gap:20px;border-radius:12px}.card-head,.card-body{padding:0 16px}.stack{gap:16px}}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:40px;padding:0 16px;border-radius:var(--radius);border:0;background:var(--primary);color:var(--primary-fg);font-size:14px;font-weight:500;text-decoration:none;white-space:nowrap;cursor:pointer;transition:background-color .15s,opacity .15s}
.btn:hover{background:#2b2b2b}
.btn[disabled]{opacity:.5;cursor:not-allowed}
.btn-outline{background:var(--background);color:var(--foreground);border:1px solid var(--border);box-shadow:0 1px 2px rgba(0,0,0,.05)}
.btn-outline:hover{background:var(--muted)}
.btn-ghost{background:transparent;color:var(--foreground)}
.btn-ghost:hover{background:var(--muted)}
.btn-sm{height:32px;padding:0 12px;font-size:13px}
.btn-block{width:100%}
.link{display:inline-flex;align-items:center;gap:4px;font-size:14px;text-decoration:none}
.link:hover{text-decoration:underline;text-underline-offset:4px}

/* form */
.fields{display:grid;gap:28px}
.field{display:grid;gap:8px}
.field label,.field .label{font-size:14px;font-weight:500;line-height:1.375}
.input,.textarea{width:100%;height:36px;padding:4px 12px;border:1px solid var(--input);border-radius:var(--radius);background:transparent;font-size:16px;box-shadow:0 1px 2px rgba(0,0,0,.05);transition:border-color .15s,box-shadow .15s}
@media (min-width:768px){.input,.textarea{font-size:14px}}
.input::placeholder,.textarea::placeholder{color:var(--muted-fg)}
.input:focus,.textarea:focus{outline:none;border-color:var(--ring);box-shadow:0 0 0 3px rgba(161,161,161,.5)}
.input[aria-invalid="true"],.textarea[aria-invalid="true"]{border-color:var(--destructive);box-shadow:0 0 0 3px rgba(220,38,38,.15)}
.textarea{height:auto;min-height:150px;padding:8px 12px;line-height:1.6;resize:vertical}
.hint{font-size:13px;line-height:1.5;color:var(--muted-fg)}
.hint.err{color:var(--destructive)}

/* badge */
.badge{display:inline-flex;align-items:center;gap:4px;padding:2px 8px;font-size:12px;font-weight:500;border-radius:6px;border:1px solid var(--border);white-space:nowrap}
.badge.secondary{background:var(--muted);border-color:transparent}

/* footer */
.site-footer{border-top:1px solid var(--border);background:rgba(245,245,245,.4)}
.site-footer .container{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:32px;padding-bottom:32px;flex-wrap:wrap}
.site-footer .fine{flex-basis:100%;padding-top:16px;border-top:1px solid var(--border);font-size:12px;line-height:1.6;color:var(--muted-fg)}
.site-footer .brand{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--muted-fg)}
.site-footer nav{display:flex;align-items:center;gap:24px;flex-wrap:wrap}
.site-footer nav a{display:flex;align-items:center;gap:6px;font-size:14px;color:var(--muted-fg);text-decoration:none;transition:color .15s}
.site-footer nav a:hover{color:var(--foreground)}
@media (max-width:767px){.site-footer .container{flex-direction:column;align-items:flex-start}.site-footer nav{gap:12px 20px}}

/* toast */
.toast{position:fixed;right:16px;bottom:16px;z-index:100;display:flex;align-items:center;gap:8px;padding:12px 16px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);box-shadow:0 10px 15px -3px rgba(0,0,0,.1),0 4px 6px -4px rgba(0,0,0,.1);font-size:14px;opacity:0;transform:translateY(8px);pointer-events:none;transition:opacity .2s,transform .2s;max-width:calc(100vw - 32px)}
.toast.show{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){*,*::before,*::after{transition-duration:.01ms!important;animation-duration:.01ms!important}}
.stack{grid-template-columns:minmax(0,1fr)}
.card,.card-body{min-width:0}
.green{color:var(--success)} .red{color:var(--destructive)}
.num-tab,.input{font-variant-numeric:tabular-nums}