:root {
  --bg: #fafbff;
  --surface: #ffffff;
  --text: #202124;
  --text-2: #4d5156;
  --muted: #5c5c5c;
  --line: #dadff4;
  --row: #f3f5fd;
  --accent: #635bff;
  --accent-2: #4f46e5;
  --pink: #ff2d8a;
  --warn-bg: #fffbeb;
  --warn-line: #fde68a;
  --radius: 10px;
  --header-h: 64px;
  --cta-h: 56px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  --cta-wash: rgba(167, 139, 250, 0.28);
  --cta-ink: rgba(67, 56, 202, 0.2);
  --max: 1200px;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { font-size: 16px; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-2);
  background: var(--bg);
  padding-bottom: calc(var(--cta-h) + 48px + env(safe-area-inset-bottom, 0px));
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--text); text-decoration: none; }
a:hover { color: var(--accent); }

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

h1 { font-size: 22px; line-height: 1.35; color: var(--text); font-weight: 700; margin: 0 0 10px; }
h2 { font-size: 18px; line-height: 1.4; color: var(--text); font-weight: 700; margin: 0 0 10px; }
h3 { font-size: 17px; line-height: 1.45; color: var(--text); font-weight: 700; margin: 0 0 8px; }
p { margin: 0 0 12px; overflow-wrap: anywhere; }

.wrap {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

#topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  height: var(--header-h);
  background: var(--surface);
  box-shadow: 0 2px 8px #f0f1f2;
}

#topbar .wrap {
  display: flex;
  align-items: center;
  height: 100%;
  gap: 16px;
}

.brand-logo {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  line-height: 0;
}

.brand-logo img {
  height: 44px;
  width: auto;
  max-width: 168px;
  object-fit: contain;
}

#nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1 1 auto;
  min-width: 0;
  height: 100%;
}

#nav a {
  display: inline-flex;
  align-items: center;
  height: 100%;
  padding: 0 12px;
  font-size: 16px;
  color: var(--text);
  position: relative;
}

#nav a.is-on::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.search-box {
  display: flex;
  min-width: 160px;
  margin-left: auto;
}

.search-box input {
  flex: 1;
  min-width: 0;
  height: 36px;
  border: 1px solid var(--line);
  border-right: 0;
  border-radius: 6px 0 0 6px;
  padding: 0 12px;
  font-size: 14px;
  background: #fff;
  color: var(--text);
}

.search-box button {
  width: 40px;
  height: 36px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 0 6px 6px 0;
  cursor: pointer;
  color: var(--accent);
}

#auth {
  display: flex;
  gap: 8px;
  flex: 0 0 auto;
}

#auth a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 12px;
  border-radius: 6px;
  font-size: 14px;
}

#auth a.ghost { border: 1px solid var(--line); }
#auth a.solid { background: var(--accent); color: #fff !important; }

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 8px;
  cursor: pointer;
}

.mobile-nav { display: none; }

.mobile-panel {
  display: none;
  background: #fff;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.mobile-panel.is-open { display: block; }

.mobile-panel a {
  display: block;
  padding: 12px 20px;
  font-size: 16px;
  color: var(--text-2);
}

.mobile-panel a.is-on { color: var(--accent); }
.mobile-panel .search-box { padding: 8px 16px 16px; }

main {
  margin-top: var(--header-h);
  padding: 16px 0 8px;
}

.card {
  background: var(--surface);
  border-radius: var(--radius);
  margin: 10px 0;
  overflow: hidden;
}

.card-pad { padding: 16px; }

.notice {
  display: block;
  padding: 12px 16px;
  background: #eef2ff;
  border: 1px solid #c7d2fe;
  border-radius: var(--radius);
  margin: 10px 0;
  font-size: 15px;
  line-height: 1.65;
  color: #1e1b4b;
}

.notice a {
  color: #312e81;
  font-weight: 600;
  white-space: nowrap;
}

.quick {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  padding: 12px;
}

.quick a {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 12px 4px;
  border-radius: 10px;
  background: var(--row);
  font-size: 13px;
  color: var(--text);
}

.quick a:hover { background: #e0e7ff; color: #312e81; }

.quick .dot {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 16px;
  font-weight: 700;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px 16px;
}

.chips a,
.chips button {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  min-height: 34px;
  padding: 0 12px;
  font-size: 14px;
  color: var(--text-2);
  cursor: pointer;
}

.chips a.is-on,
.chips button.is-on {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.feed {
  display: grid;
  gap: 10px;
}

.item {
  display: flex;
  gap: 12px;
  padding: 14px;
  background: #fff;
  border-radius: var(--radius);
  min-width: 0;
}

.item .body { flex: 1; min-width: 0; }

.item h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
}

.item .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
}

.item p {
  margin: 0;
  font-size: 16px;
  line-height: 1.55;
  color: #374151;
}

.item .place { margin-top: 8px; font-size: 13px; color: var(--accent); }

.item .thumb {
  width: 96px;
  flex: 0 0 96px;
  height: 120px;
  object-fit: cover;
  border-radius: 8px;
  background: var(--row);
  align-self: center;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  padding: 0 8px;
  border-radius: 4px;
  background: #e0e7ff;
  color: #1e1b4b;
  font-size: 12px;
}

.prose ul { margin: 0 0 12px; padding-left: 1.2em; }
.prose li { margin: 4px 0; }

.alert {
  background: var(--warn-bg);
  border: 1px solid var(--warn-line);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 14px;
  margin: 10px 0;
}

.form-grid { display: grid; gap: 12px; max-width: 420px; }
.form-grid label { display: block; font-size: 14px; margin-bottom: 4px; }
.form-grid input,
.form-grid textarea,
.form-grid select {
  width: 100%;
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 16px;
  font-family: inherit;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 16px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 16px;
  cursor: pointer;
}

.note {
  margin-top: 12px;
  padding: 10px 12px;
  background: var(--row);
  border-radius: 8px;
  font-size: 14px;
}

.faq dt { font-weight: 700; color: var(--text); margin-top: 14px; }
.faq dd { margin: 6px 0 0; }

.split {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.split .main { flex: 1 1 640px; min-width: 0; }
.split .side { flex: 1 1 260px; min-width: 0; }

.side-card {
  padding: 14px;
  background: #fff;
  border-radius: var(--radius);
  margin-bottom: 10px;
}

.side-card a { display: block; padding: 8px 0; border-bottom: 1px solid var(--row); }

.site-foot {
  background: #fff;
  color: var(--muted);
  text-align: center;
  padding: 28px 12px 16px;
}

.site-foot nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 16px; margin-bottom: 10px; }
.site-foot .brand a { color: var(--text); font-weight: 700; }

.site-cta {
  position: fixed;
  z-index: 30;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: #fff !important;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  padding: 12px 18px;
  text-align: center;
  text-decoration: none !important;
  overflow: visible;
  isolation: isolate;
}

.site-cta:hover,
.site-cta:focus-visible {
  color: #fff !important;
  background: var(--accent-2);
}

.site-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(120% 160% at 32% 40%, var(--cta-wash) 0%, transparent 72%);
  opacity: 0;
  pointer-events: none;
  animation: petal-tint 2.9s cubic-bezier(0.2, 0.7, 0.3, 1) infinite;
}

.site-cta::after {
  content: "";
  position: absolute;
  inset: 8px 16px;
  border-radius: inherit;
  box-shadow: inset 0 0 0 0 var(--cta-ink);
  pointer-events: none;
  animation: stem-press 2.9s cubic-bezier(0.2, 0.7, 0.3, 1) infinite;
}

.site-cta span { position: relative; z-index: 1; }

@keyframes petal-tint {
  0%, 58% { opacity: 0; transform: scale(0.96); }
  72% { opacity: 0.26; transform: scale(1); }
  88%, 100% { opacity: 0; transform: scale(1); }
}

@keyframes stem-press {
  0%, 64% { transform: scale(1); box-shadow: inset 0 0 0 0 var(--cta-ink); }
  76% { transform: scale(0.97); box-shadow: inset 0 0 16px 2px var(--cta-ink); }
  90%, 100% { transform: scale(1); box-shadow: inset 0 0 0 0 var(--cta-ink); }
}

@media (min-width: 768px) {
  .site-cta {
    left: 50%;
    bottom: 16px;
    transform: translateX(-50%);
    width: 480px;
    min-height: 56px;
    border-radius: 14px;
  }
  .feed { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 991px) {
  .search-box.desk { display: none; }
}

@media (max-width: 767px) {
  .site-cta {
    left: 12px;
    right: 12px;
    bottom: calc(12px + env(safe-area-inset-bottom, 0px));
    width: auto;
    min-height: 56px;
    border-radius: 12px;
    font-size: 15px;
    padding: 12px 14px;
  }
  #nav, #auth { display: none !important; }
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
  #topbar .wrap { justify-content: space-between; }
  .mobile-nav {
    display: block;
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    z-index: 19;
  }
  .quick { grid-template-columns: repeat(3, 1fr); }
  .feed { grid-template-columns: 1fr; }
  .item .thumb { width: 80px; flex-basis: 80px; height: 100px; }
}

@media (prefers-reduced-motion: reduce) {
  .site-cta::before,
  .site-cta::after { animation: none; }
  .site-cta::before { opacity: 0.18; transform: scale(1); }
  .site-cta::after { box-shadow: inset 0 0 10px 1px var(--cta-ink); }
}