:root { --fg: #1b2430; --muted: #6b7683; --line: #e3e8ee; --bg: #f7f8fa; --card: #fff; }
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}
header, main, footer, #gate { max-width: 720px; margin: 0 auto; padding: 0 16px; }
header { padding-top: 28px; padding-bottom: 8px; }
header h1 { font-size: 22px; margin: 0; }
footer { padding: 24px 16px 40px; }
.muted { color: var(--muted); font-size: 13px; }
.state { color: var(--muted); padding: 24px 0; }

article {
  background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  padding: 16px 18px; margin: 14px 0;
}
article h2 { font-size: 18px; margin: 0 0 4px; }
article time { color: var(--muted); font-size: 13px; }
.body { margin-top: 8px; overflow-wrap: anywhere; }
.body h1 { font-size: 20px; }
.body h2 { font-size: 18px; }
.body h3 { font-size: 16px; }
.body p { margin: .6em 0; }
.body ul, .body ol { padding-left: 1.4em; margin: .6em 0; }
.body code { background: #eef1f5; border-radius: 3px; padding: 1px 5px; font-size: .92em; }
.body a { color: #1a6fd4; }
.shots { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.shots img { max-width: 100%; border-radius: 6px; border: 1px solid var(--line); }

@media (prefers-color-scheme: dark) {
  :root { --fg: #e6eaf0; --muted: #96a0ad; --line: #2b3440; --bg: #141a21; --card: #1b222b; }
  .body code { background: #263039; }
  .body a { color: #6cb1ff; }
}

#gate { max-width: 720px; margin: 0 auto; padding: 24px 16px; }
#gate .state { padding: 8px 0; }
#cf-turnstile { margin: 8px 0; }
#gate-go, #contact-go {
  font: inherit; padding: 9px 20px; border: 0; border-radius: 6px;
  background: #1a6fd4; color: #fff; cursor: pointer;
}
#gate-go:hover, #contact-go:hover { background: #1560bd; }

#gate-form, #contact-form { margin-top: 14px; display: grid; gap: 10px; max-width: 420px; }
#gate-form label, #contact-form label { display: grid; gap: 4px; font-size: 14px; }
#gate-form label.check, #contact-form label.check { display: flex; align-items: center; gap: 8px; }
#gate-form input[type=email], #gate-form input[type=text],
#contact-form input[type=email], #contact-form input[type=text] {
  font: inherit; padding: 8px 10px; border: 1px solid var(--line);
  border-radius: 6px; background: var(--card); color: var(--fg);
}
#gate-form input:focus, #contact-form input:focus { outline: 2px solid #1a6fd4; outline-offset: 1px; }
#gate-go:disabled, #contact-go:disabled { background: #9fb3cc; cursor: not-allowed; }
#terms:empty { display: none; }

#system section { margin-bottom: 22px; }
h2.sec { font-size: 16px; margin: 0 0 8px; color: var(--muted); font-weight: 600; }
#terms-box, #contact-box {
  background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px 18px;
}
#contact {
  margin-top: 12px; padding: 14px 16px; border-radius: 8px;
  background: #eaf3ff; border: 1px solid #bcd8fb; font-size: 17px;
}
@media (prefers-color-scheme: dark) { #contact { background: #17293f; border-color: #2d4a6f; } }

/* 卡号输入时的芯片式样预览(与 puk.nbsn.co 一致):按芯片上两行排布,便于逐位核对 */
.lookup-row { display: flex; gap: 10px; align-items: stretch; flex-wrap: wrap; }
.lookup-row input { flex: 1 1 180px; }
.chip-preview {
  flex: 1 1 150px; padding: 10px 12px;
  background: #f3f1ea; border: 1px solid #cfcabd; border-radius: 8px;
  font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 15px; letter-spacing: 1px;
  color: #333; display: flex; flex-direction: column; justify-content: center; gap: 4px;
}
.chip-preview span { white-space: nowrap; }
/* 类选择器的 display:flex 会盖过 [hidden],需显式声明 */
.chip-preview[hidden] { display: none; }

/* 表单里的状态提示:空的时候不该占位 —— .state 的 24px 上下内边距会把按钮推开近 50px */
#gate-out, #contact-out { padding: 2px 0; margin: 0; font-size: 13px; }
#gate-out:empty, #contact-out:empty { display: none; }
#cf-turnstile { margin: 0; }

/* 手机端:窄屏时输入框与芯片预览各占一行,按钮贴着表单 */
@media (max-width: 480px) {
  header, main, footer, #gate { padding: 0 12px; }
  #gate-form, #contact-form { max-width: none; }
  .lookup-row input, .chip-preview { flex: 1 1 100%; }
  #terms-box, #contact-box { padding: 14px; }
  article { padding: 14px; }
}

/* 防御:无空格的长串(微信号、链接、卡号)不得撑破布局 */
article h2, .body, #contact, #terms { overflow-wrap: anywhere; }

.home-row { margin: 6px 0 4px; }
#go-home {
  font: inherit; padding: 8px 16px; border: 1px solid var(--line); border-radius: 6px;
  background: var(--card); color: var(--muted); cursor: pointer;
}
#go-home:hover { color: var(--fg); }