/* ═══════════════════════════════════════════════════════════════
   中国100 vs 欧美100 赚钱项目数据库 - 主样式文件
   ═══════════════════════════════════════════════════════════════ */

:root {
  --bg: #0a0a0f;
  --bg2: #12121a;
  --bg3: #1a1a26;
  --card: #16161f;
  --card-hover: #1e1e2e;
  --border: rgba(255,255,255,0.07);
  --border2: rgba(255,255,255,0.12);
  --text: #e8e8f0;
  --text2: #9999b8;
  --text3: #6666a0;
  --accent: #6c5ce7;
  --accent2: #a29bfe;
  --cn: #ff6b6b;
  --cn2: #ff8e8e;
  --eu: #00b894;
  --eu2: #55efc4;
  --gold: #fdcb6e;
  --blue: #74b9ff;
  --pink: #fd79a8;
  --green: #00cec9;
  --orange: #e17055;
  --shadow: 0 4px 24px rgba(0,0,0,0.5);
  --shadow2: 0 8px 48px rgba(0,0,0,0.6);
  --radius: 16px;
  --radius2: 12px;
  --radius3: 8px;
  --font: 'Noto Sans SC', 'Inter', sans-serif;
  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
}

.light {
  --bg: #f5f5fa;
  --bg2: #ebebf5;
  --bg3: #e0e0ee;
  --card: #ffffff;
  --card-hover: #f8f8ff;
  --border: rgba(0,0,0,0.07);
  --border2: rgba(0,0,0,0.12);
  --text: #1a1a2e;
  --text2: #4a4a70;
  --text3: #8888aa;
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow2: 0 8px 48px rgba(0,0,0,0.12);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
  line-height: 1.6;
}

/* ── HEADER ── */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(10,10,15,0.85);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 64px;
  display: flex; align-items: center; justify-content: space-between;
  transition: background var(--transition);
}
.light .header { background: rgba(245,245,250,0.88); }
.header-left { display: flex; align-items: center; gap: 12px; }
.logo-icon { font-size: 22px; }
.logo-text { font-size: 15px; font-weight: 700; letter-spacing: -0.3px; }
.logo-text span { color: var(--accent2); }
.header-right { display: flex; align-items: center; gap: 10px; }
.badge-count {
  font-size: 12px; font-weight: 600;
  padding: 4px 10px; border-radius: 20px;
  background: linear-gradient(135deg, rgba(108,92,231,0.2), rgba(162,155,254,0.2));
  border: 1px solid rgba(162,155,254,0.3);
  color: var(--accent2);
}
.theme-btn {
  width: 40px; height: 40px; border-radius: 50%;
  border: 1px solid var(--border2);
  background: var(--card);
  color: var(--text);
  cursor: pointer; font-size: 17px;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.theme-btn:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ── HERO ── */
.hero {
  padding: 120px 24px 80px;
  text-align: center;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(108,92,231,0.15) 0%, transparent 70%);
  position: relative; overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%236c5ce7' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}
.hero-tag {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; font-weight: 600; letter-spacing: 1.5px; text-transform: uppercase;
  color: var(--accent2); margin-bottom: 20px;
  padding: 6px 14px; border-radius: 20px;
  background: rgba(108,92,231,0.1); border: 1px solid rgba(162,155,254,0.2);
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.8rem);
  font-weight: 900; line-height: 1.1;
  letter-spacing: -1px; margin-bottom: 16px;
}
.hero h1 .cn { color: var(--cn); }
.hero h1 .eu { color: var(--eu2); }
.hero p {
  font-size: clamp(14px, 2vw, 17px);
  color: var(--text2); max-width: 600px; margin: 0 auto 40px;
  line-height: 1.7;
}
.hero-stats {
  display: flex; align-items: center; justify-content: center; gap: 32px;
  flex-wrap: wrap;
}
.stat { text-align: center; }
.stat-num { font-size: 2rem; font-weight: 800; color: var(--accent2); line-height: 1; }
.stat-label { font-size: 12px; color: var(--text3); margin-top: 4px; }
.stat-divider { width: 1px; height: 40px; background: var(--border2); }

/* ── CONTROLS ── */
.controls {
  position: sticky; top: 64px; z-index: 90;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 14px 24px;
  transition: background var(--transition);
}
.controls-inner { max-width: 1200px; margin: 0 auto; }
.controls-row1 { display: flex; gap: 12px; align-items: center; margin-bottom: 12px; flex-wrap: wrap; }
.controls-row2 { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.search-wrap {
  flex: 1; min-width: 220px; max-width: 400px; position: relative;
}
.search-wrap::before {
  content: '🔍'; position: absolute; left: 12px; top: 50%; transform: translateY(-50%);
  font-size: 14px; pointer-events: none;
}
.search-input {
  width: 100%; padding: 10px 12px 10px 38px;
  background: var(--card); border: 1px solid var(--border2);
  border-radius: var(--radius3); color: var(--text);
  font-family: var(--font); font-size: 14px;
  transition: all var(--transition); outline: none;
}
.search-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(108,92,231,0.15); }
.search-input::placeholder { color: var(--text3); }
.tab-group { display: flex; gap: 6px; }
.tab-btn {
  padding: 8px 18px; border-radius: var(--radius3);
  border: 1px solid var(--border2);
  background: var(--card); color: var(--text2);
  font-family: var(--font); font-size: 13px; font-weight: 600;
  cursor: pointer; transition: all var(--transition);
  display: flex; align-items: center; gap: 6px;
}
.tab-btn:hover { color: var(--text); border-color: var(--border2); }
.tab-btn.active.cn { background: rgba(255,107,107,0.15); color: var(--cn); border-color: rgba(255,107,107,0.4); }
.tab-btn.active.eu { background: rgba(0,184,148,0.15); color: var(--eu); border-color: rgba(0,184,148,0.4); }
.tab-btn.active.all { background: rgba(108,92,231,0.15); color: var(--accent2); border-color: rgba(162,155,254,0.4); }
.filter-label { font-size: 12px; color: var(--text3); font-weight: 500; }
.diff-btn {
  padding: 6px 12px; border-radius: var(--radius3);
  border: 1px solid var(--border); background: var(--card);
  color: var(--text2); font-family: var(--font); font-size: 12px; font-weight: 600;
  cursor: pointer; transition: all var(--transition);
}
.diff-btn:hover, .diff-btn.active { background: rgba(253,203,110,0.15); color: var(--gold); border-color: rgba(253,203,110,0.35); }
.cat-filter-btn {
  padding: 6px 12px; border-radius: var(--radius3);
  border: 1px solid var(--border); background: var(--card);
  color: var(--text2); font-family: var(--font); font-size: 12px; font-weight: 500;
  cursor: pointer; transition: all var(--transition);
}
.cat-filter-btn:hover { border-color: var(--accent); color: var(--accent2); }
.cat-filter-btn.active { background: rgba(108,92,231,0.15); color: var(--accent2); border-color: rgba(162,155,254,0.4); }
.results-info { font-size: 12px; color: var(--text3); margin-left: auto; }

/* ── GRID ── */
.grid-section {
  padding: 24px;
  max-width: 1200px; margin: 0 auto;
}
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

/* ── CARD ── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  cursor: pointer;
  transition: all var(--transition);
  position: relative; overflow: hidden;
}
.card::before {
  content: ''; position: absolute;
  top: 0; left: 0; right: 0; height: 2px;
  opacity: 0; transition: opacity var(--transition);
}
.card.cn::before { background: linear-gradient(90deg, var(--cn), var(--pink)); }
.card.eu::before { background: linear-gradient(90deg, var(--eu), var(--blue)); }
.card:hover { background: var(--card-hover); border-color: var(--border2); transform: translateY(-2px); box-shadow: var(--shadow); }
.card:hover::before { opacity: 1; }
.card-head { display: flex; align-items: flex-start; gap: 12px; margin-bottom: 14px; }
.card-badge { font-size: 24px; line-height: 1; flex-shrink: 0; }
.card-meta { flex: 1; min-width: 0; }
.card-id { font-size: 11px; font-weight: 600; color: var(--text3); letter-spacing: 0.5px; margin-bottom: 2px; }
.card-title { font-size: 15px; font-weight: 700; color: var(--text); line-height: 1.3; }
.card-region {
  font-size: 10px; font-weight: 700; letter-spacing: 1px;
  padding: 3px 8px; border-radius: 10px; flex-shrink: 0;
}
.region-cn { background: rgba(255,107,107,0.15); color: var(--cn); border: 1px solid rgba(255,107,107,0.25); }
.region-eu { background: rgba(0,184,148,0.15); color: var(--eu); border: 1px solid rgba(0,184,148,0.25); }
.card-cat {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 11px; font-weight: 500; color: var(--text3);
  background: var(--bg3); padding: 3px 10px; border-radius: 10px;
  margin-bottom: 10px;
}
.card-body { font-size: 12.5px; color: var(--text2); line-height: 1.6; margin-bottom: 12px; }
.card-tip {
  font-size: 11.5px; font-style: italic; color: var(--accent2);
  padding: 6px 10px; background: rgba(108,92,231,0.07); border-radius: var(--radius3);
  border-left: 2px solid var(--accent);
  margin-bottom: 12px;
}
.card-foot { display: flex; align-items: center; justify-content: space-between; }
.stars { display: flex; gap: 2px; }
.star { font-size: 11px; }
.star.on { color: var(--gold); }
.star.off { color: var(--border2); }
.diff-label { font-size: 11px; color: var(--text3); margin-left: 4px; }
.cost-tag {
  font-size: 11px; font-weight: 500; color: var(--text3);
  background: var(--bg2); padding: 3px 8px; border-radius: 8px;
}

/* ── MODAL ── */
.modal-overlay {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(6px);
  display: none; align-items: center; justify-content: center;
  padding: 20px;
}
.modal-overlay.open { display: flex; }
.modal {
  background: var(--bg2); border: 1px solid var(--border2);
  border-radius: 20px; width: 100%; max-width: 640px;
  max-height: 90vh; overflow-y: auto;
  box-shadow: var(--shadow2);
  animation: modalIn 0.25s ease;
}
@keyframes modalIn { from { opacity:0; transform: scale(0.95) translateY(10px); } to { opacity:1; transform: none; } }
.modal-header {
  padding: 24px 24px 0;
  display: flex; align-items: flex-start; justify-content: space-between; gap: 12px;
}
.modal-title-area { flex: 1; }
.modal-id { font-size: 12px; color: var(--text3); margin-bottom: 4px; }
.modal-title { font-size: 22px; font-weight: 800; line-height: 1.2; }
.modal-close {
  width: 36px; height: 36px; border-radius: 50%;
  border: 1px solid var(--border2); background: var(--card);
  color: var(--text2); cursor: pointer; font-size: 18px;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition); flex-shrink: 0;
}
.modal-close:hover { background: rgba(255,100,100,0.15); color: #ff6b6b; border-color: #ff6b6b; }
.modal-tags { display: flex; gap: 8px; flex-wrap: wrap; padding: 12px 24px; }
.modal-body { padding: 0 24px 24px; }
.info-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 16px; }
.info-card {
  background: var(--bg3); border-radius: var(--radius3);
  padding: 12px; border: 1px solid var(--border);
}
.info-card-label { font-size: 10px; color: var(--text3); font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 4px; }
.info-card-value { font-size: 13px; color: var(--text); font-weight: 500; }
.section-title {
  font-size: 12px; font-weight: 700; color: var(--text3);
  text-transform: uppercase; letter-spacing: 1px;
  margin-bottom: 8px; margin-top: 16px;
  display: flex; align-items: center; gap: 6px;
}
.section-title::after { content: ''; flex: 1; height: 1px; background: var(--border); }
.path-steps {
  display: flex; flex-direction: column; gap: 8px;
  padding: 12px; background: var(--bg3); border-radius: var(--radius3);
}
.path-step {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: 13px; color: var(--text2);
}
.path-num {
  width: 22px; height: 22px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff; font-size: 11px; font-weight: 700;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.insight-box {
  padding: 14px 16px;
  background: linear-gradient(135deg, rgba(108,92,231,0.1), rgba(162,155,254,0.05));
  border: 1px solid rgba(162,155,254,0.2);
  border-radius: var(--radius3);
  font-size: 13px; color: var(--accent2); line-height: 1.6;
}
.diff-full { display: flex; align-items: center; gap: 6px; margin-top: 8px; }
.diff-full .stars { gap: 3px; }
.diff-full .star { font-size: 16px; }

/* ── COMPARISON SECTION ── */
.compare-section {
  padding: 60px 24px;
  max-width: 1200px; margin: 0 auto;
}
.section-heading {
  font-size: 28px; font-weight: 800; margin-bottom: 8px; letter-spacing: -0.5px;
}
.section-sub { font-size: 15px; color: var(--text2); margin-bottom: 36px; }
.compare-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.compare-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px; overflow: hidden; position: relative;
}
.compare-card::before { content: ''; position: absolute; top:0; left:0; right:0; height: 3px; }
.compare-card.cn::before { background: linear-gradient(90deg, var(--cn), var(--pink)); }
.compare-card.eu::before { background: linear-gradient(90deg, var(--eu), var(--blue)); }
.compare-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 20px; }
.compare-card h3 span { font-size: 24px; margin-right: 8px; }
.compare-list { display: flex; flex-direction: column; gap: 12px; }
.compare-item {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: 13.5px; color: var(--text2);
}
.compare-dot {
  width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; margin-top: 5px;
}
.compare-item strong { color: var(--text); }

/* ── TOP PICKS ── */
.toplist-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; }
.toplist-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius2); padding: 16px 18px;
  display: flex; align-items: center; gap: 14px;
  transition: all var(--transition); cursor: pointer;
}
.toplist-card:hover { background: var(--card-hover); transform: translateY(-1px); box-shadow: var(--shadow); }
.toplist-rank {
  font-size: 22px; font-weight: 900; color: var(--border2);
  width: 32px; text-align: center; flex-shrink: 0;
}
.toplist-rank.gold { color: var(--gold); }
.toplist-rank.silver { color: #ccc; }
.toplist-rank.bronze { color: #cd7f32; }
.toplist-info { flex: 1; }
.toplist-title { font-size: 14px; font-weight: 600; margin-bottom: 3px; }
.toplist-meta { font-size: 11px; color: var(--text3); }

/* ── FORMULA SECTION ── */
.formula-section {
  padding: 60px 24px;
  background: linear-gradient(135deg, rgba(108,92,231,0.06), rgba(0,206,201,0.04));
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
}
.formula-inner { max-width: 960px; margin: 0 auto; text-align: center; }
.formula-cards { display: grid; grid-template-columns: 1fr auto 1fr; gap: 16px; align-items: center; margin-top: 36px; }
.formula-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px; text-align: center;
}
.formula-card h4 { font-size: 16px; font-weight: 700; margin-bottom: 12px; }
.formula-card p { font-size: 13px; color: var(--text2); line-height: 1.7; }
.formula-plus {
  font-size: 32px; font-weight: 800; color: var(--accent2); text-align: center;
}

/* ── FOOTER ── */
.footer {
  text-align: center; padding: 40px 24px;
  border-top: 1px solid var(--border);
  color: var(--text3); font-size: 13px; line-height: 1.8;
}
.footer strong { color: var(--text2); }

/* ── EMPTY STATE ── */
.empty-state {
  text-align: center; padding: 80px 24px;
  grid-column: 1 / -1;
}
.empty-state h3 { font-size: 20px; color: var(--text2); margin-bottom: 8px; }
.empty-state p { color: var(--text3); font-size: 14px; }

/* ── RESPONSIVE ── */
@media (max-width: 700px) {
  .compare-grid { grid-template-columns: 1fr; }
  .formula-cards { grid-template-columns: 1fr; }
  .formula-plus { transform: rotate(90deg); }
  .hero h1 { font-size: 1.9rem; }
  .info-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 20px; }
  .stat-divider { display: none; }
}
@media (max-width: 480px) {
  .header { padding: 0 14px; }
  .logo-text { font-size: 13px; }
  .controls { padding: 10px 14px; }
  .grid-section { padding: 16px 14px; }
}

/* ── BACK TO TOP ── */
.back-top {
  position: fixed; bottom: 24px; right: 24px; z-index: 99;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--accent); color: #fff; border: none;
  cursor: pointer; font-size: 18px;
  display: none; align-items: center; justify-content: center;
  box-shadow: 0 4px 20px rgba(108,92,231,0.4);
  transition: all var(--transition);
}
.back-top.visible { display: flex; }
.back-top:hover { transform: translateY(-2px); box-shadow: 0 6px 28px rgba(108,92,231,0.5); }

/* ── SCROLL REVEAL ── */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity 0.5s ease, transform 0.5s ease; }
.reveal.visible { opacity: 1; transform: none; }