/* ========== Hero Section ========== */
.hero {
  position: relative; overflow: hidden;
  background: linear-gradient(135deg, #0a1628 0%, #0f2044 30%, #132244 60%, #0e1a30 100%);
  padding: 80px 24px 100px;
}
.hero::before {
  content: ''; position: absolute;
  top: -50%; left: -30%; width: 160%; height: 200%;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(14,165,233,0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 60%, rgba(124,58,237,0.12) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(56,189,248,0.08) 0%, transparent 50%);
  pointer-events: none;
}
.hero-particles {
  position: absolute; inset: 0; overflow: hidden; pointer-events: none;
}
.hero-particle {
  position: absolute; border-radius: 50%;
  background: rgba(14,165,233,0.3);
  animation: floatUp 8s infinite ease-in-out;
}
@keyframes floatUp {
  0%,100% { transform: translateY(0) scale(1); opacity: 0.3; }
  50% { transform: translateY(-60px) scale(1.5); opacity: 0.15; }
}
.hero-inner {
  position: relative; z-index: 2;
  max-width: var(--max-width); margin: 0 auto;
  text-align: center;
}

/* ========== 双入口布局 ========== */
.hero-search-main {
  margin-bottom: 48px;
}

/* 智能搜索框 */
.smart-search-box {
  position: relative;
  max-width: 720px;
  margin: 32px auto 0;
}

.search-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.08);
  border: 2px solid rgba(255, 255, 255, 0.15);
  border-radius: 16px;
  padding: 6px;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.search-input-wrapper:focus-within {
  border-color: rgba(14, 165, 233, 0.6);
  background: rgba(255, 255, 255, 0.12);
  box-shadow: 0 0 0 4px rgba(14, 165, 233, 0.1);
}

.search-icon {
  font-size: 20px;
  padding: 0 12px;
  opacity: 0.6;
}

#smartSearchInput {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: #fff;
  font-size: 16px;
  padding: 12px 0;
  font-weight: 400;
}

#smartSearchInput::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.btn-smart-search {
  background: linear-gradient(135deg, #0ea5e9, #7c3aed);
  color: #fff;
  border: none;
  border-radius: 12px;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  white-space: nowrap;
}

.btn-smart-search:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 20px rgba(14, 165, 233, 0.4);
}

/* 快捷标签 */
.quick-tags {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 16px;
}

.quick-tags .tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 20px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.3s ease;
  user-select: none;
}

.quick-tags .tag:hover {
  background: rgba(14, 165, 233, 0.15);
  border-color: rgba(14, 165, 233, 0.4);
  color: #38bdf8;
  transform: translateY(-2px);
}

/* 搜索结果下拉 */
.search-results-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: rgba(15, 23, 42, 0.98);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 12px;
  padding: 12px;
  max-height: 400px;
  overflow-y: auto;
  display: none;
  backdrop-filter: blur(20px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  z-index: 100;
}

.search-results-dropdown.active {
  display: block;
}

.search-result-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  color: inherit;
}

.search-result-item:hover {
  background: rgba(14, 165, 233, 0.1);
}

.search-result-icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.search-result-content {
  flex: 1;
  text-align: left;
}

.search-result-title {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 4px;
}

.search-result-desc {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
}

.search-result-meta {
  display: flex;
  gap: 8px;
  align-items: center;
}

.search-result-badge {
  padding: 2px 8px;
  background: rgba(14, 165, 233, 0.2);
  color: #38bdf8;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
}

.search-no-results {
  text-align: center;
  padding: 32px 16px;
  color: rgba(255, 255, 255, 0.5);
}

.search-no-results .icon {
  font-size: 48px;
  display: block;
  margin-bottom: 12px;
}

/* 辅助导航卡片 */
.hero-nav-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 960px;
  margin: 0 auto;
}
.hero-brand { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 20px; }
.hero-brand .pill {
  display: inline-block; padding: 5px 14px; border-radius: 20px;
  font-size: 12px; font-weight: 600; letter-spacing: 1px;
  background: rgba(14,165,233,0.15); color: #38bdf8;
  border: 1px solid rgba(14,165,233,0.25);
}
.hero h1 {
  font-size: 52px; font-weight: 800; letter-spacing: 2px; line-height: 1.2;
  background: linear-gradient(135deg, #ffffff 0%, #a5d6f8 40%, #c4b5fd 70%, #ffffff 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 14px;
}
.hero-subtitle {
  font-size: 18px; color: rgba(255,255,255,0.65); font-weight: 400;
  margin-bottom: 6px; letter-spacing: 0.5px;
}
.hero-domain {
  font-size: 15px; color: rgba(56,189,248,0.8); font-weight: 500;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  letter-spacing: 1px;
}
.hero-cta { margin-top: 36px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ========== Four Entrance Grid (Hero) ========== */
.four-entrance-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 48px;
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
}
.entrance-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 24px 16px;
  text-align: center;
  transition: all var(--transition-fast);
  backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  align-items: center;
}
.entrance-card:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(14, 165, 233, 0.4);
  box-shadow: 0 8px 32px rgba(14, 165, 233, 0.15);
}
.entrance-icon { font-size: 32px; display: block; margin-bottom: 12px; }
.entrance-card h3 { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 6px; }
.entrance-card p { font-size: 12px; color: rgba(255, 255, 255, 0.6); line-height: 1.4; }

/* 响应式适配 */
@media (max-width: 768px) {
  .hero-nav-cards {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  
  .smart-search-box {
    margin: 24px auto 0;
  }
  
  .search-input-wrapper {
    flex-direction: column;
    padding: 12px;
  }
  
  #smartSearchInput {
    width: 100%;
    padding: 12px;
  }
  
  .btn-smart-search {
    width: 100%;
    margin-top: 8px;
  }
  
  .quick-tags {
    gap: 8px;
  }
  
  .quick-tags .tag {
    padding: 5px 12px;
    font-size: 12px;
  }
  
  .four-entrance-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-top: 36px;
  }
  .entrance-card { padding: 20px 12px; }
  .entrance-icon { font-size: 28px; }
  .entrance-card h3 { font-size: 14px; }
  .entrance-card p { font-size: 11px; }
}
@media (max-width: 480px) {
  .four-entrance-grid {
    grid-template-columns: 1fr;
  }
}

/* ========== Qoder Banner 广告样式 ========== */
.qoder-banner-section {
  padding: 0 20px;
  margin: 40px auto;
  max-width: 1200px;
}
.qoder-banner-new {
  display: block;
  text-decoration: none;
  border-radius: 20px;
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 24px rgba(14, 165, 233, 0.25);
}
.qoder-banner-new:hover {
  transform: translateY(-6px) scale(1.01);
  box-shadow: 0 16px 48px rgba(14, 165, 233, 0.4);
}
.qoder-banner-visual {
  position: relative;
  background: linear-gradient(135deg, #0c4a6e 0%, #1e3a8a 30%, #5b21b6 70%, #7c3aed 100%);
  padding: 48px 56px;
  min-height: 200px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
/* 背景装饰 */
.qoder-bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.4;
  animation: orbFloat 8s ease-in-out infinite;
}
.orb-1 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, #0ea5e9 0%, transparent 70%);
  top: -100px;
  right: 10%;
  animation-delay: 0s;
}
.orb-2 {
  width: 250px;
  height: 250px;
  background: radial-gradient(circle, #ec4899 0%, transparent 70%);
  bottom: -80px;
  left: 20%;
  animation-delay: 4s;
}
@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(20px, -20px) scale(1.1); }
}
.qoder-bg-grid {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}
/* 内容布局 */
.qoder-banner-left {
  display: flex;
  align-items: center;
  gap: 28px;
  flex: 1;
  position: relative;
  z-index: 2;
}
.qoder-icon-box {
  width: 80px;
  height: 80px;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(20px);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  flex-shrink: 0;
  transition: all 0.3s ease;
}
.qoder-banner-new:hover .qoder-icon-box {
  transform: rotate(-5deg) scale(1.05);
  background: rgba(255, 255, 255, 0.25);
}
.qoder-letter {
  font-size: 42px;
  font-weight: 900;
  color: #fff;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}
.qoder-info {
  flex: 1;
}
.qoder-info h3 {
  font-size: 26px;
  font-weight: 800;
  color: #fff;
  margin: 0 0 10px 0;
  line-height: 1.3;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}
.qoder-desc {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.9);
  margin: 0 0 16px 0;
  line-height: 1.5;
}
.qoder-tags {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.qoder-tag {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  padding: 8px 16px;
  border-radius: 24px;
  font-size: 14px;
  font-weight: 600;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.25);
  transition: all 0.3s ease;
}
.qoder-banner-new:hover .qoder-tag {
  background: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}
/* CTA按钮 */
.qoder-banner-right {
  position: relative;
  z-index: 2;
  flex-shrink: 0;
}
.qoder-cta-btn {
  background: #fff;
  color: #5b21b6;
  padding: 18px 36px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 18px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}
.qoder-cta-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.3) 0%, transparent 50%);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.qoder-banner-new:hover .qoder-cta-btn::before {
  opacity: 1;
}
.qoder-banner-new:hover .qoder-cta-btn {
  transform: scale(1.08);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
}
.qoder-cta-arrow {
  font-size: 22px;
  transition: transform 0.3s ease;
}
.qoder-banner-new:hover .qoder-cta-arrow {
  transform: translateX(6px);
}

/* 响应式适配 */
@media (max-width: 768px) {
  .qoder-banner-section { margin: 30px auto; padding: 0 16px; }
  .qoder-banner-visual { 
    flex-direction: column; 
    padding: 36px 28px; 
    gap: 28px;
    text-align: center;
  }
  .qoder-banner-left { 
    flex-direction: column; 
    width: 100%;
  }
  .qoder-icon-box { width: 64px; height: 64px; }
  .qoder-letter { font-size: 32px; }
  .qoder-info h3 { font-size: 20px; }
  .qoder-desc { font-size: 14px; }
  .qoder-tags { justify-content: center; }
  .qoder-cta-btn { width: 100%; justify-content: center; }
}

.btn-primary {
  padding: 12px 32px; border-radius: 10px;
  font-size: 15px; font-weight: 600;
  background: linear-gradient(135deg, #0ea5e9, #7c3aed);
  color: #fff; transition: all var(--transition-fast);
  box-shadow: 0 4px 16px rgba(14,165,233,0.3);
  display: inline-flex; align-items: center; gap: 6px;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(14,165,233,0.4); }
.btn-outline {
  padding: 12px 28px; border-radius: 10px;
  font-size: 15px; font-weight: 600; border: 1.5px solid rgba(255,255,255,0.25);
  color: rgba(255,255,255,0.85); transition: all var(--transition-fast);
  display: inline-flex; align-items: center; gap: 6px;
}
.btn-outline:hover { border-color: rgba(255,255,255,0.5); background: rgba(255,255,255,0.06); }

/* ========== Quick Entry Cards (replaced by AI Products below) ========== */
/* quick-section, quick-grid, quick-card, quick-card-icon styles retained for backward compat */

/* ========== AI Product Cards (ai-bot.cn style) ========== */
.ai-products-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
}
.ai-product-card {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: var(--radius-md); padding: 20px;
  display: flex; gap: 14px; align-items: flex-start;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
}
.ai-product-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(14,165,233,0.2);
}
.ai-product-icon {
  width: 48px; height: 48px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 800; color: #fff; flex-shrink: 0;
  letter-spacing: 0.5px;
}
.ai-product-body { flex: 1; min-width: 0; }
.ai-product-body h4 { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.ai-product-body p { font-size: 12px; color: var(--text-secondary); line-height: 1.4; margin-bottom: 8px; }
.ai-product-tags { display: flex; gap: 4px; flex-wrap: wrap; margin-bottom: 6px; }
.ai-product-tags span {
  font-size: 10px; padding: 2px 8px; border-radius: 10px;
  background: var(--bg-secondary); color: var(--text-muted);
}
.ai-product-meta {
  font-size: 11px; color: var(--text-muted); display: flex; gap: 8px;
}
.ai-product-meta span:first-child { color: #f59e0b; font-weight: 600; }

/* ========== Toolchain Cards ========== */
.toolchain-grid {
  display: grid !important;
  grid-template-columns: repeat(3, 1fr) !important;
  gap: 16px !important;
}
.toolchain-card {
  background: var(--bg-card) !important;
  border: 1px solid var(--border-color) !important;
  border-radius: var(--radius-md) !important;
  padding: 24px !important;
  transition: all var(--transition-fast) !important;
  box-shadow: var(--shadow-sm) !important;
  display: block !important;
}
.toolchain-card:hover {
  transform: translateY(-3px) !important;
  box-shadow: var(--shadow-hover) !important;
  border-color: rgba(14, 165, 233, 0.2) !important;
}
.toolchain-steps {
  display: flex !important;
  align-items: center !important;
  gap: 8px !important;
  margin-bottom: 16px !important;
  overflow-x: auto !important;
  padding-bottom: 4px !important;
}
.step-item {
  display: flex !important;
  align-items: center !important;
  gap: 4px !important;
  background: var(--bg-secondary) !important;
  padding: 4px 8px !important;
  border-radius: 6px !important;
  font-size: 12px !important;
  white-space: nowrap !important;
}
.step-num {
  width: 16px !important;
  height: 16px !important;
  background: var(--color-accent) !important;
  color: #fff !important;
  border-radius: 50% !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  font-size: 10px !important;
  font-weight: 700 !important;
}
.step-name { font-weight: 600 !important; color: var(--text-primary) !important; }
.step-arrow { color: var(--text-muted) !important; font-size: 14px !important; }
.toolchain-card h4 { font-size: 16px !important; font-weight: 700 !important; margin-bottom: 6px !important; }
.toolchain-card p { font-size: 13px !important; color: var(--text-secondary) !important; line-height: 1.5 !important; }

/* ========== Daily Flash Ticker ========== */
.daily-flash-bar {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: var(--radius-md); padding: 14px 20px;
  display: flex; align-items: center; gap: 14px;
  box-shadow: var(--shadow-sm); overflow: hidden;
}
.flash-label {
  font-size: 13px; font-weight: 700; color: var(--color-accent);
  white-space: nowrap; flex-shrink: 0;
}
.flash-scroll-wrap {
  flex: 1; overflow: hidden; position: relative;
  mask-image: linear-gradient(90deg, transparent 0%, black 5%, black 95%, transparent 100%);
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, black 5%, black 95%, transparent 100%);
}
.flash-scroll-inner {
  display: flex; align-items: center; gap: 0;
  animation: flashScroll 40s linear infinite;
  white-space: nowrap;
}
.flash-item {
  font-size: 13px; color: var(--text-secondary); white-space: nowrap;
  transition: color var(--transition-fast);
}
.flash-item:hover { color: var(--color-accent); }
.flash-sep {
  font-size: 12px; color: var(--border-color); margin: 0 16px;
  user-select: none;
}
.flash-more {
  font-size: 12px; color: var(--color-accent); font-weight: 500;
  white-space: nowrap; flex-shrink: 0;
}
.flash-more:hover { color: var(--color-accent-deep); }
@keyframes flashScroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ========== Earn Cards ========== */
.earn-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
}
.earn-card {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: var(--radius-md); padding: 22px 18px;
  transition: all var(--transition-fast); position: relative;
  box-shadow: var(--shadow-sm); overflow: hidden;
}
.earn-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  transition: opacity var(--transition-fast); opacity: 0;
}
.earn-card:hover::before { opacity: 1; }
.earn-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.earn-task::before { background: linear-gradient(90deg, #f59e0b, #fbbf24); }
.earn-bounty::before { background: linear-gradient(90deg, #7c3aed, #a78bfa); }
.earn-beta::before { background: linear-gradient(90deg, #10b981, #34d399); }
.earn-coupon::before { background: linear-gradient(90deg, #ec4899, #f472b6); }
.earn-card-badge {
  position: absolute; top: 12px; right: 12px;
  font-size: 11px; padding: 3px 10px; border-radius: 12px;
  font-weight: 600; background: var(--bg-secondary);
}
.earn-task .earn-card-badge { color: #f59e0b; background: rgba(245,158,11,0.08); }
.earn-bounty .earn-card-badge { color: #7c3aed; background: rgba(124,58,237,0.08); }
.earn-beta .earn-card-badge { color: #10b981; background: rgba(16,185,129,0.08); }
.earn-coupon .earn-card-badge { color: #ec4899; background: rgba(236,72,153,0.08); }
.earn-card-icon { font-size: 28px; margin-bottom: 10px; }
.earn-card h4 { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.earn-card p { font-size: 12px; color: var(--text-secondary); line-height: 1.5; margin-bottom: 14px; }
.earn-card-footer { display: flex; justify-content: space-between; align-items: center; }
.earn-reward {
  font-size: 13px; font-weight: 700;
  background: linear-gradient(135deg, #f59e0b, #fbbf24);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.earn-count { font-size: 11px; color: var(--text-muted); }

/* ========== Search Section ========== */
.search-section {
  max-width: var(--max-width); margin: -44px auto 0; padding: 0 24px;
  position: relative; z-index: 10;
}
.search-box {
  background: var(--bg-card); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg); padding: 24px 28px;
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}
.search-tabs { display: flex; gap: 4px; margin-bottom: 16px; flex-wrap: wrap; }
.search-tab {
  padding: 6px 16px; border-radius: 20px; font-size: 13px; font-weight: 500;
  color: var(--text-secondary); transition: all var(--transition-fast);
}
.search-tab:hover { color: var(--color-accent); background: rgba(14,165,233,0.06); }
.search-tab.active { background: rgba(14,165,233,0.1); color: var(--color-accent); font-weight: 600; }
.search-input-row { display: flex; align-items: center; gap: 8px; }
.search-icon { color: var(--text-muted); font-size: 18px; flex-shrink: 0; }
.search-input-row input {
  flex: 1; height: 44px; font-size: 15px; color: var(--text-primary);
  border: 1.5px solid var(--border-color); border-radius: 10px; padding: 0 16px;
  background: var(--bg-secondary); transition: border-color var(--transition-fast);
}
.search-input-row input:focus { border-color: var(--color-accent); }
.search-input-row input::placeholder { color: var(--text-muted); }
.btn-search {
  height: 44px; padding: 0 22px; border-radius: 10px;
  font-size: 14px; font-weight: 600; color: #fff;
  background: linear-gradient(135deg, #0ea5e9, #7c3aed);
  transition: all var(--transition-fast); white-space: nowrap;
  box-shadow: 0 2px 8px rgba(14,165,233,0.2);
}
.btn-search:hover { box-shadow: 0 4px 16px rgba(14,165,233,0.3); }
.search-engines { display: flex; gap: 8px; margin-top: 12px; align-items: center; flex-wrap: wrap; }
.search-engine-label { font-size: 12px; color: var(--text-muted); }
.search-engine-item {
  font-size: 12px; padding: 3px 10px; border-radius: 12px;
  background: var(--bg-secondary); color: var(--text-secondary);
  transition: all var(--transition-fast);
}
.search-engine-item:hover { background: rgba(14,165,233,0.08); color: var(--color-accent); }
.search-engine-item.active { background: rgba(14,165,233,0.1); color: var(--color-accent); font-weight: 600; }

/* ========== Quick Entry Cards ========== */
.quick-section { max-width: var(--max-width); margin: 40px auto 0; padding: 0 24px; }
.quick-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.quick-card {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: var(--radius-md); padding: 22px 20px;
  display: flex; align-items: center; gap: 14px;
  transition: all var(--transition-fast); cursor: pointer;
  box-shadow: var(--shadow-sm);
}
.quick-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(14,165,233,0.2);
}
.quick-card-icon {
  width: 44px; height: 44px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; flex-shrink: 0;
  color: #fff;
}
.quick-card-icon.cyan { background: linear-gradient(135deg, #0ea5e9, #38bdf8); }
.quick-card-icon.purple { background: linear-gradient(135deg, #7c3aed, #a78bfa); }
.quick-card-icon.green { background: linear-gradient(135deg, #10b981, #34d399); }
.quick-card-icon.orange { background: linear-gradient(135deg, #f59e0b, #fbbf24); }
.quick-card-info h4 { font-size: 15px; font-weight: 600; line-height: 1.3; }
.quick-card-info p { font-size: 12px; color: var(--text-muted); margin-top: 2px; }

/* ========== Section Common ========== */
.section { max-width: var(--max-width); margin: 56px auto 0; padding: 0 24px; }
.section-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.section-title {
  font-size: 22px; font-weight: 700; display: flex; align-items: center; gap: 10px;
}
.section-title-icon { font-size: 24px; }
.section-more {
  font-size: 13px; color: var(--color-accent); font-weight: 500;
  transition: all var(--transition-fast); display: flex; align-items: center; gap: 4px;
}
.section-more:hover { color: var(--color-accent-deep); }

/* ========== Boards Grid ========== */
.boards-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.board-card {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: var(--radius-md); padding: 26px 22px;
  transition: all var(--transition-fast); cursor: pointer;
  box-shadow: var(--shadow-sm);
  position: relative; overflow: hidden;
}
.board-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, #0ea5e9, #7c3aed);
  opacity: 0; transition: opacity var(--transition-fast);
}
.board-card:hover::before { opacity: 1; }
.board-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); border-color: rgba(14,165,233,0.15); }
.board-card-icon {
  width: 46px; height: 46px; border-radius: 12px; font-size: 22px;
  display: flex; align-items: center; justify-content: center; margin-bottom: 14px;
  color: #fff;
}
.board-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.board-card p { font-size: 13px; color: var(--text-secondary); line-height: 1.5; margin-bottom: 12px; }
.board-card-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.board-card-tags span {
  font-size: 11px; padding: 3px 10px; border-radius: 12px;
  background: var(--bg-secondary); color: var(--text-muted);
  transition: all var(--transition-fast);
}
.board-card:hover .board-card-tags span { background: rgba(14,165,233,0.06); color: var(--color-accent); }

/* ========== Hot Topics ========== */
.hot-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.hot-card {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: var(--radius-md); overflow: hidden;
  transition: all var(--transition-fast); cursor: pointer;
  box-shadow: var(--shadow-sm);
}
.hot-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.hot-card-img {
  height: 160px; position: relative; overflow: hidden;
  background: linear-gradient(135deg, #0a1628, #132244);
}
.hot-card-img img {
  width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0;
}
.hot-card-img .overlay-glow {
  position: absolute; inset: 0; z-index: 1;
  background: radial-gradient(ellipse at center, rgba(14,165,233,0.12) 0%, transparent 70%);
}
.hot-card-body { padding: 16px 18px; }
.hot-card-badge {
  display: inline-block; padding: 3px 10px; border-radius: 12px;
  font-size: 11px; font-weight: 600; margin-bottom: 8px;
}
.hot-card-badge.news { background: rgba(14,165,233,0.1); color: #0ea5e9; }
.hot-card-badge.event { background: rgba(124,58,237,0.1); color: #7c3aed; }
.hot-card-badge.insight { background: rgba(16,185,129,0.1); color: #10b981; }
.hot-card h4 { font-size: 15px; font-weight: 600; line-height: 1.4; margin-bottom: 6px; }
.hot-card p { font-size: 12px; color: var(--text-muted); line-height: 1.5; }
.hot-card-meta { font-size: 11px; color: var(--text-muted); margin-top: 10px; display: flex; gap: 12px; }

/* ========== Stats Banner ========== */
.stats-banner {
  max-width: var(--max-width); margin: 56px auto 0; padding: 0 24px;
}
.stats-inner {
  background: linear-gradient(135deg, #0a1628, #132244);
  border-radius: var(--radius-xl); padding: 48px 40px;
  display: flex; justify-content: space-around; align-items: center;
  flex-wrap: wrap; gap: 24px; position: relative; overflow: hidden;
}
.stats-inner::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(14,165,233,0.08) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 50%, rgba(124,58,237,0.08) 0%, transparent 60%);
}
.stat-item { text-align: center; position: relative; z-index: 1; }
.stat-number { font-size: 40px; font-weight: 800; letter-spacing: 1px;
  background: linear-gradient(135deg, #38bdf8, #a78bfa);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label { font-size: 13px; color: rgba(255,255,255,0.55); margin-top: 4px; }

/* ========== Community Banner ========== */
.community-banner {
  max-width: var(--max-width); margin: 56px auto 0; padding: 0 24px;
}
.community-inner {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: var(--radius-lg); padding: 36px 40px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; box-shadow: var(--shadow-sm);
  flex-wrap: wrap;
}
.community-text h3 { font-size: 20px; font-weight: 700; margin-bottom: 6px; }
.community-text p { font-size: 14px; color: var(--text-secondary); }
.community-actions { display: flex; gap: 10px; flex-shrink: 0; }
.community-actions .btn-join { padding: 12px 24px; font-size: 14px; }
.community-actions .btn-secondary {
  padding: 12px 20px; border-radius: 8px; font-size: 14px; font-weight: 600;
  border: 1.5px solid var(--border-color); color: var(--text-primary);
  transition: all var(--transition-fast);
}
.community-actions .btn-secondary:hover { border-color: var(--color-accent); color: var(--color-accent); }

/* ========== Responsive ========== */
@media (max-width: 1199px) {
  .boards-grid { grid-template-columns: repeat(3, 1fr); }
  .quick-grid { grid-template-columns: repeat(2, 1fr); }
  .hot-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-products-grid { grid-template-columns: repeat(2, 1fr); }
  .earn-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 991px) {
  .hero h1 { font-size: 36px; }
  .boards-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 767px) {
  .hero { padding: 56px 16px 72px; }
  .hero h1 { font-size: 28px; }
  .hero-subtitle { font-size: 15px; }
  .search-section { padding: 0 16px; margin-top: -30px; }
  .search-box { padding: 18px; }
  .search-tabs { gap: 2px; }
  .search-tab { padding: 4px 10px; font-size: 12px; }
  .boards-grid { grid-template-columns: repeat(2, 1fr); }
  .hot-grid { grid-template-columns: 1fr; }
  .quick-grid { grid-template-columns: 1fr; }
  .ai-products-grid { grid-template-columns: 1fr; }
  .earn-grid { grid-template-columns: 1fr 1fr; }
  .daily-flash-bar { flex-direction: column; gap: 8px; text-align: center; }
  .stats-inner { padding: 32px 20px; }
  .stat-number { font-size: 30px; }
  .community-inner { padding: 24px; flex-direction: column; text-align: center; }
}
@media (max-width: 480px) {
  .boards-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 24px; }
  .earn-grid { grid-template-columns: 1fr; }
  .hero-cta { flex-direction: column; align-items: center; }
}