:root {
  --warm-50:  #fff7ee;
  --warm-100: #ffe9d4;
  --warm-200: #ffd1a8;
  --warm-300: #ffb070;
  --warm-400: #ff8a45;
  --warm-500: #e76f1f;
  --warm-600: #c8550f;
  --warm-700: #8e3a07;
  --ink-900:  #2a1a0c;
  --ink-700:  #5a3d22;
  --ink-500:  #8b6e54;
  --line:     rgba(142, 58, 7, 0.12);
  --bg:       #fff8f0;
  --card:     #ffffff;
  --shadow:   0 8px 28px rgba(143, 64, 14, 0.08);
  --radius:   16px;
}

* { box-sizing: border-box; }
html, body { padding: 0; margin: 0; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--ink-900);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--warm-600); text-decoration: none; }
a:hover { text-decoration: underline; }

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

/* ===== Hero ===== */
.hero {
  background:
    radial-gradient(1200px 400px at 90% -20%, var(--warm-200), transparent 60%),
    radial-gradient(900px 360px at -10% 10%, var(--warm-100), transparent 70%),
    linear-gradient(180deg, #ffeed7 0%, var(--bg) 100%);
  padding: 56px 20px 32px;
  border-bottom: 1px solid var(--line);
}
.hero-inner {
  max-width: 980px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.avatar {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 6px 24px rgba(231, 111, 31, 0.25);
  border: 4px solid #fff;
  flex-shrink: 0;
}
.hero-text {
  flex: 1 1 300px;
  min-width: 0;
}
.hero-text h1 {
  margin: 0 0 6px;
  font-size: 28px;
  letter-spacing: 0.5px;
  color: var(--warm-700);
}
.tagline {
  margin: 0;
  color: var(--ink-700);
  font-size: 15px;
}

.hero-cta {
  flex-shrink: 0;
  background: #fff;
  padding: 8px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
}
.hero-cta .qr {
  width: 132px;
  height: auto;
  display: block;
  border-radius: 8px;
}

.stats {
  max-width: 980px;
  margin: 28px auto 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.stat {
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px 14px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
}
.stat-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--warm-600);
  letter-spacing: 0.5px;
}
.stat-label {
  font-size: 13px;
  color: var(--ink-500);
  margin-top: 4px;
}

/* ===== Container ===== */
.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 28px 20px 64px;
}

/* ===== Filters ===== */
.filters {
  display: grid;
  grid-template-columns: 1fr 140px 220px;
  gap: 10px;
  margin-bottom: 24px;
}
.filters input,
.filters select {
  padding: 10px 14px;
  font-size: 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink-900);
  outline: none;
  transition: border-color .2s, box-shadow .2s;
  font-family: inherit;
}
.filters input:focus,
.filters select:focus {
  border-color: var(--warm-400);
  box-shadow: 0 0 0 3px rgba(255, 138, 69, 0.15);
}

/* ===== Timeline ===== */
.timeline {
  position: relative;
  padding-left: 28px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--warm-300), var(--warm-100));
  border-radius: 2px;
}

.year-group {
  margin-bottom: 28px;
}
.year-label {
  position: relative;
  font-size: 18px;
  font-weight: 700;
  color: var(--warm-700);
  margin: 0 0 14px;
  padding-left: 6px;
}
.year-label::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--warm-500);
  border: 3px solid #fff;
  box-shadow: 0 0 0 2px var(--warm-200);
}

.record {
  position: relative;
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px;
  margin-bottom: 12px;
  border: 1px solid var(--line);
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 14px;
  cursor: pointer;
  transition: transform .15s, box-shadow .15s;
}
.record:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 36px rgba(143, 64, 14, 0.12);
}
.record::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 22px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--warm-300);
  box-shadow: 0 0 0 2px #fff;
}
.record-thumb {
  width: 88px;
  height: 88px;
  background: var(--warm-50);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--line);
  flex-shrink: 0;
}
.record-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.record-body {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.record-project {
  font-weight: 600;
  font-size: 15px;
  color: var(--ink-900);
  margin: 0 0 4px;
  word-break: break-word;
}
.record-foundation {
  font-size: 13px;
  color: var(--ink-700);
  margin: 0 0 8px;
}
.record-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  font-size: 12px;
  color: var(--ink-500);
  margin-top: auto;
}
.record-meta .amount {
  color: var(--warm-600);
  font-weight: 700;
  font-size: 14px;
}
.tag {
  display: inline-block;
  padding: 2px 8px;
  background: var(--warm-50);
  color: var(--warm-700);
  border-radius: 999px;
  font-size: 12px;
  border: 1px solid var(--warm-100);
}
.tag-channel { font-weight: 600; }
.tag-channel-txgy { background: #fff0e9; color: #b8421b; border-color: #ffd1bb; }
.tag-channel-xwgc { background: #e8f1ff; color: #2453a8; border-color: #c8dbff; }
.tag-channel-other { background: #f1eee9; color: #6b5c4a; border-color: #ddd5cb; }

.empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--ink-500);
}

/* ===== Lightbox ===== */
.lightbox {
  border: none;
  padding: 0;
  border-radius: var(--radius);
  background: #fff;
  max-width: 92vw;
  max-height: 92vh;
  width: 720px;
  box-shadow: 0 24px 80px rgba(0,0,0,0.3);
  overflow: hidden;
}
.lightbox::backdrop { background: rgba(20, 8, 0, 0.7); }
.lightbox-close {
  position: absolute;
  top: 8px;
  right: 12px;
  border: none;
  background: rgba(0,0,0,0.4);
  color: #fff;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  font-size: 22px;
  cursor: pointer;
  z-index: 2;
  line-height: 1;
}
#lightbox-img {
  max-width: 100%;
  max-height: 70vh;
  object-fit: contain;
  display: block;
  margin: 0 auto;
  background: #faf3e8;
}
.lightbox-meta {
  padding: 14px 18px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  color: var(--ink-700);
  background: var(--warm-50);
}
.lightbox-meta strong { color: var(--warm-700); }

/* ===== Section navigation ===== */
.section-nav {
  max-width: 980px;
  margin: 28px auto 0;
  display: flex;
  gap: 8px;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(8px);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px;
  width: fit-content;
}
.section-tab {
  appearance: none;
  background: transparent;
  border: none;
  font-family: inherit;
  cursor: pointer;
  padding: 8px 22px;
  border-radius: 999px;
  color: var(--ink-700);
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
  transition: background .15s, color .15s;
}
.section-tab:hover { background: var(--warm-50); text-decoration: none; }
.section-tab.is-active {
  background: var(--warm-500);
  color: #fff;
  box-shadow: 0 4px 14px rgba(231, 111, 31, 0.3);
}

/* ===== Page section ===== */
.page-section {
  margin-bottom: 48px;
}
.muted { color: var(--ink-500); }
.small { font-size: 13px; }

/* ===== Sponsors ===== */
.sponsors-stats {
  max-width: 980px;
  margin: 12px auto 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.sponsors-stats .stat-value { font-size: 20px; }

.sponsor-list {
  position: relative;
}
.sponsor-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: 0 4px 14px rgba(143, 64, 14, 0.04);
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: transform .15s, box-shadow .15s;
}
.sponsor-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(143, 64, 14, 0.1);
}
.sponsor-card .sp-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}
.sponsor-card .sp-name {
  font-weight: 600;
  color: var(--ink-900);
  word-break: break-word;
}
.sponsor-card .sp-amount {
  color: var(--warm-600);
  font-weight: 700;
  font-size: 16px;
  white-space: nowrap;
}
.sponsor-card .sp-date { font-size: 12px; color: var(--ink-500); }
.sponsor-card .sp-message {
  font-size: 13px;
  color: var(--ink-700);
  background: var(--warm-50);
  padding: 6px 10px;
  border-radius: 8px;
  margin-top: 4px;
  border-left: 3px solid var(--warm-300);
  word-break: break-word;
}

/* ===== Responsive ===== */
@media (max-width: 720px) {
  .hero { padding: 28px 14px 18px; }
  .hero-inner { gap: 12px; justify-content: center; }
  .avatar { display: none; }
  .hero-text { flex: 1 1 auto; text-align: center; min-width: 0; }
  .hero-text h1 { font-size: 20px; margin-bottom: 4px; }
  .tagline { font-size: 13px; }

  .hero-cta { padding: 6px; }
  .hero-cta .qr { width: 140px; height: auto; }

  .stats {
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
    margin-top: 18px;
  }
  .sponsors-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
    margin-top: 8px;
  }
  .stat { padding: 10px 6px; }
  .stat-value { font-size: 15px; letter-spacing: 0; }
  .stat-label { font-size: 11px; margin-top: 2px; }
  .sponsors-stats .stat-value { font-size: 14px; }

  .section-nav { width: 100%; justify-content: center; margin-top: 18px; }
  .section-tab { flex: 1; text-align: center; padding: 8px 12px; }

  .container { padding: 20px 16px 48px; }
  .filters {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr) minmax(0, 1fr);
    gap: 6px;
    margin-bottom: 18px;
  }
  .filters input,
  .filters select {
    padding: 8px 10px;
    font-size: 13px;
    border-radius: 10px;
  }

  .timeline { padding-left: 22px; }
  .timeline::before { left: 5px; }
  .year-label::before { left: -22px; width: 12px; height: 12px; }
  .record { grid-template-columns: 72px 1fr; padding: 12px; }
  .record::before { left: -19px; }
  .record-thumb { width: 72px; height: 72px; }
  .record-project { font-size: 14px; }

  .lightbox { width: 96vw; }
}

/* ===== Admin reuse helpers ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  background: var(--warm-500);
  color: #fff;
  border: none;
  border-radius: 12px;
  font-size: 14px;
  cursor: pointer;
  font-family: inherit;
  font-weight: 600;
  transition: background .15s, transform .15s;
}
.btn:hover { background: var(--warm-600); }
.btn:active { transform: translateY(1px); }
.btn.btn-secondary { background: #fff; color: var(--warm-700); border: 1px solid var(--warm-200); }
.btn.btn-secondary:hover { background: var(--warm-50); }
.btn.btn-danger { background: #c33b1f; }
.btn.btn-danger:hover { background: #9c2b13; }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }

/* ===== Dark mode (auto) ===== */
@media (prefers-color-scheme: dark) {
  :root {
    --warm-50:  #2a1f15;
    --warm-100: #3a2a18;
    --warm-200: #4a361f;
    --warm-300: #ffb070;
    --warm-400: #ff8a45;
    --warm-500: #ff7a2a;
    --warm-600: #ff9050;
    --warm-700: #ffc28a;
    --ink-900:  #f5e9da;
    --ink-700:  #d6b896;
    --ink-500:  #9a826a;
    --line:     rgba(255, 200, 138, 0.14);
    --bg:       #14100b;
    --card:     #1f1813;
    --shadow:   0 8px 28px rgba(0, 0, 0, 0.45);
  }

  .hero {
    background:
      radial-gradient(1200px 400px at 90% -20%, rgba(255, 138, 69, 0.18), transparent 60%),
      radial-gradient(900px 360px at -10% 10%, rgba(255, 138, 69, 0.10), transparent 70%),
      linear-gradient(180deg, #1c1410 0%, var(--bg) 100%);
  }
  .hero-cta { background: var(--card); }
  .avatar { border-color: var(--card); }

  .filters input,
  .filters select { background: var(--card); color: var(--ink-900); }
  .section-nav { background: rgba(31, 24, 19, 0.75); }

  .year-label::before { border-color: var(--bg); }
  .record::before { box-shadow: 0 0 0 2px var(--card); }

  .tag-channel-txgy { background: rgba(184, 66, 27, 0.22); color: #ff9d6f; border-color: rgba(184, 66, 27, 0.4); }
  .tag-channel-xwgc { background: rgba(36, 83, 168, 0.28); color: #a3c0ff; border-color: rgba(36, 83, 168, 0.45); }
  .tag-channel-other { background: rgba(107, 92, 74, 0.3); color: #c5b69e; border-color: rgba(107, 92, 74, 0.45); }

  .lightbox { background: var(--card); }
  .lightbox-close { background: rgba(255, 255, 255, 0.15); }
  #lightbox-img { background: var(--warm-50); }

  .btn.btn-secondary { background: var(--card); }
  .btn.btn-secondary:hover { background: var(--warm-50); }
}