:root {
  --bg: #FBF5EA;
  --bg-glow: #FFF9F0;
  --card: #FFFFFF;
  --ink: #2E2A24;
  --muted: #7A7064;
  --line: #EADFCC;
  --accent: #E8763A;
  --accent-hover: #D66529;
  --blue: #3D8BD9;
  --blue-soft: #E9F2FC;
  --chip: #F6EFE3;
  --ok: #2E8B57;
  --ok-bg: #EAF6EF;
  --warn-bg: #FFF7E0;
  --warn-ink: #7A5B12;
  --err-bg: #FDECEC;
  --err-ink: #B43434;
  --hl: #FFE08A;
  --shadow: 0 8px 28px rgba(80, 60, 30, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1E1B17;
    --bg-glow: #25211C;
    --card: #2A2621;
    --ink: #F3EDE3;
    --muted: #B5AA9B;
    --line: #3D372F;
    --blue-soft: #22364D;
    --chip: #332E27;
    --ok-bg: #1F382A;
    --warn-bg: #3A3018;
    --warn-ink: #F2D58A;
    --err-bg: #3E2222;
    --err-ink: #FF9E9E;
    --hl: #7A5B12;
    --shadow: 0 8px 28px rgba(0, 0, 0, 0.28);
  }
}

*, *::before, *::after {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  max-width: 100%;
  overflow-x: clip;
  background: radial-gradient(circle at 50% 0%, var(--bg-glow) 0%, var(--bg) 65%);
  color: var(--ink);
  font-family: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  line-height: 1.55;
}

.en-font {
  font-family: "Avenir Next", "Nunito", "Trebuchet MS", "Segoe UI", sans-serif;
}

.wrap {
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  padding: 14px 16px 40px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 4px 0 12px;
  font-size: 13px;
  color: var(--muted);
}

.site-head b {
  color: var(--ink);
  font-size: 16px;
  letter-spacing: 0.2px;
}

.site-head a {
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--line);
  background: var(--card);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
}

.card-box {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 20px 18px;
  box-shadow: var(--shadow);
  width: 100%;
  max-width: 100%;
}

.hero-robo {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
}

.hero-robo svg {
  flex: 0 0 58px;
  width: 58px;
  height: 58px;
}

.hero-title {
  margin: 0;
  font-size: 21px;
  line-height: 1.3;
}

.hero-sub {
  margin: 4px 0 0;
  font-size: 14px;
  color: var(--muted);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 0;
  border-radius: 14px;
  padding: 12px 18px;
  min-height: 46px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  transition: transform 0.12s ease, opacity 0.15s ease, background 0.15s ease;
  max-width: 100%;
}

.btn:active:not(:disabled) {
  transform: scale(0.98);
}

.btn:disabled {
  opacity: 0.42;
  cursor: not-allowed;
}

.btn.blue {
  background: var(--blue);
}

.btn.ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}

.btn.danger {
  background: var(--err-bg);
  color: var(--err-ink);
  border: 1px solid var(--line);
}

.btn.small {
  min-height: 36px;
  padding: 6px 12px;
  font-size: 13px;
  border-radius: 10px;
}

.btn.full {
  width: 100%;
}

input[type="text"], textarea {
  width: 100%;
  min-width: 0;
  max-width: 100%;
  font-size: 16px;
  padding: 11px 13px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink);
  font-family: inherit;
}

input[type="text"]:focus, textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
}

.alert {
  border-radius: 14px;
  padding: 11px 14px;
  font-size: 14px;
  line-height: 1.55;
  margin-top: 12px;
  overflow-wrap: anywhere;
}

.alert.warn {
  background: var(--warn-bg);
  color: var(--warn-ink);
}

.alert.err {
  background: var(--err-bg);
  color: var(--err-ink);
}

.alert.ok {
  background: var(--ok-bg);
  color: var(--ok);
}

.badge {
  display: inline-block;
  border-radius: 999px;
  padding: 2px 10px;
  font-size: 12px;
  font-weight: 600;
  background: var(--chip);
  color: var(--muted);
}

.badge.ok {
  background: var(--ok-bg);
  color: var(--ok);
}

.foot-note {
  margin-top: auto;
  padding-top: 22px;
  text-align: center;
  font-size: 12px;
  color: var(--muted);
}

.foot-note a {
  color: var(--muted);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.hide {
  display: none !important;
}