/* ===================================
   Claw123 Style Theme for OneNav v2
   UI升级版 - Space Grotesk + DM Sans
   =================================== */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;700&family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* CSS Variables */
:root {
  --bg-primary: #F8FAFC;
  --bg-secondary: #F1F5F9;
  --bg-card: #FFFFFF;
  --bg-card-hover: #F8FAFC;
  --border-color: #E2E8F0;
  --border-hover: #C7D2FE;
  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-muted: #94A3B8;
  --accent: #6366f1;
  --accent-hover: #4F46E5;
  --accent-glow: rgba(99,102,241,0.12);
  --gold: #f59e0b;
  --gold-glow: rgba(245,158,11,0.12);
  --shadow-card: 0 1px 4px rgba(15,23,42,0.08);
  --shadow-hover: 0 8px 28px rgba(99,102,241,0.16);
  --radius: 14px;
  --radius-sm: 8px;
  --transition: all 0.22s cubic-bezier(0.4,0,0.2,1);
}

/* Reset & Base */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

h1,h2,h3,h4,h5,h6 {
  font-family: 'Space Grotesk', 'DM Sans', sans-serif;
  font-weight: 600;
}

a { color: inherit; text-decoration: none; transition: var(--transition); }

/* Page Container */
.page { max-width: 1440px; margin: 0 auto; padding: 0 24px; }

/* ===================================
   Topbar
   =================================== */
.topbar-wrap {
  position: sticky; top: 0; z-index: 100;
  background: rgba(248,250,252,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
}

.topbar {
  max-width: 1440px; margin: 0 auto; padding: 0 24px;
  height: 64px; display: flex; align-items: center;
  justify-content: space-between;
}

.brand { display: flex; align-items: center; gap: 20px; }

.brand-logo { display: flex; align-items: center; gap: 12px; }

.brand-mark {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--gold) 100%);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700; font-size: 15px; color: #fff;
  box-shadow: 0 4px 16px var(--accent-glow);
  flex-shrink: 0;
}

.brand-logo-img {
  height: 60px; width: auto; max-width: 200px;
  object-fit: contain; display: block;
}

.hero-logo-img {
  height: 120px; width: auto; max-width: 360px;
  object-fit: contain; display: block;
}

.brand-text { display: flex; flex-direction: column; }

.brand-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 17px; font-weight: 600; color: var(--text-primary);
  letter-spacing: -0.3px;
}

.brand-subtitle { font-size: 11px; color: var(--text-muted); }

.drag-tip {
  display: flex; align-items: center; gap: 6px;
  padding: 6px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  font-size: 12px; color: var(--text-secondary);
  cursor: pointer; transition: var(--transition);
}
.drag-tip:hover { border-color: var(--border-hover); color: var(--text-primary); }
.drag-tip .arrow { color: var(--accent); }

.topnav { display: flex; gap: 4px; }

.topnav a {
  color: var(--text-secondary); font-size: 14px;
  padding: 8px 14px; border-radius: var(--radius-sm);
  transition: var(--transition);
}
.topnav a:hover { color: var(--text-primary); background: var(--bg-card); }

/* ===================================
   Hero Search
   =================================== */
.hero { padding: 64px 0 44px; text-align: center; }

.search-shell { max-width: 680px; margin: 0 auto; }

.hero-logo { margin-bottom: 36px; }

.hero-logo-mark {
  display: inline-flex; align-items: center; gap: 18px;
}

.hero-logo-badge {
  width: 68px; height: 68px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--gold) 100%);
  border-radius: 18px;
  display: flex; align-items: center; justify-content: center;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700; font-size: 24px; color: #fff;
  box-shadow: 0 12px 40px var(--accent-glow), 0 4px 16px var(--gold-glow);
  flex-shrink: 0;
}

.hero-logo-copy { text-align: left; }

.hero-logo-copy strong {
  display: block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 30px; font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.5px;
  margin-bottom: 4px;
}

.hero-logo-copy span { font-size: 14px; color: var(--text-secondary); }

.search-engine-tabs {
  display: flex; gap: 4px; margin-bottom: 12px;
  justify-content: center;
}

.engine-tab {
  padding: 6px 18px;
  background: transparent;
  border: 1.5px solid var(--border-color);
  border-radius: 20px;
  font-family: 'DM Sans', sans-serif;
  font-size: 13px; font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer; transition: var(--transition);
}
.engine-tab:hover { border-color: var(--accent); color: var(--accent); }
.engine-tab.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.search-row {
  display: flex; gap: 10px; margin-bottom: 20px;
}

.search-input-wrap { flex: 1; position: relative; }

.search-input {
  width: 100%;
  padding: 15px 20px 15px 50px;
  background: var(--bg-card);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius);
  font-family: 'DM Sans', sans-serif;
  font-size: 15px; color: var(--text-primary);
  outline: none; transition: var(--transition);
}
.search-input::placeholder { color: var(--text-muted); }
.search-input:focus {
  border-color: var(--accent);
  background: var(--bg-card-hover);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.search-icon {
  position: absolute; left: 17px; top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  display: flex; align-items: center;
  pointer-events: none;
}

.search-button {
  padding: 15px 32px;
  background: linear-gradient(135deg, var(--accent), #4f46e5);
  border: none; border-radius: var(--radius);
  font-family: 'DM Sans', sans-serif;
  font-size: 15px; font-weight: 600; color: #fff;
  cursor: pointer; transition: var(--transition);
  white-space: nowrap;
}
.search-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(99,102,241,0.45);
}
.search-button:active { transform: translateY(0); }

.hotline {
  display: flex; align-items: center;
  justify-content: center; gap: 10px; flex-wrap: wrap;
}
.hotline strong {
  font-size: 12px; color: var(--text-muted); font-weight: 500;
}
.hot-items { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }
.hot-items span, .hot-item {
  padding: 5px 14px;
  background: rgba(99,102,241,0.08);
  border: 1px solid rgba(99,102,241,0.2);
  border-radius: 20px;
  font-size: 13px; color: var(--accent-hover);
  cursor: pointer; transition: var(--transition);
  display: inline-block;
}
.hot-items span:hover, .hot-item:hover {
  background: var(--accent); border-color: var(--accent);
  color: #fff; transform: translateY(-1px);
}

/* ===================================
   Anchor Nav
   =================================== */
.anchor-wrap {
  position: sticky; top: 64px; z-index: 90;
  background: rgba(248,250,252,0.95);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-color);
  padding: 10px 0;
}
.anchor-bar {
  max-width: 1440px; margin: 0 auto; padding: 0 24px;
  display: flex; gap: 6px;
  overflow-x: auto; scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  flex-wrap: nowrap;
}
.anchor-bar::-webkit-scrollbar { display: none; }
.anchor-link {
  padding: 7px 16px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 20px;
  font-size: 13px; color: var(--text-secondary);
  white-space: nowrap; transition: var(--transition);
}
.anchor-link:hover { color: var(--text-primary); background: var(--bg-card); border-color: var(--border-color); }
.anchor-link.is-active {
  background: var(--accent-glow);
  border-color: var(--accent);
  color: var(--accent-hover);
}

/* ===================================
   Main Content
   =================================== */
.content { padding: 44px 0 100px; }

.section { margin-bottom: 64px; }

.section-head {
  display: flex; align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 20px; padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}
.section-head-left { display: flex; align-items: flex-start; gap: 16px; }

.section-kicker {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 28px; font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--gold));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; opacity: 0.7; line-height: 1;
}
.section-title-wrap { display: flex; flex-direction: column; gap: 3px; }
.section-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 20px; font-weight: 600; color: var(--text-primary);
}
.section-subtitle { font-size: 13px; color: var(--text-secondary); }
.section-meta {
  font-size: 12px; color: var(--text-muted);
  padding: 4px 12px; background: var(--bg-card);
  border: 1px solid var(--border-color); border-radius: 20px;
  white-space: nowrap; flex-shrink: 0;
}

/* ===================================
   Cards Grid
   =================================== */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
}

.card {
  display: flex; flex-direction: column;
  padding: 18px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  transition: var(--transition);
  cursor: pointer; position: relative; overflow: hidden;
}
.card::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, var(--accent-glow), transparent 60%);
  opacity: 0; transition: var(--transition);
  border-radius: var(--radius);
  pointer-events: none;
}
.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}
.card:hover::before { opacity: 1; }

.card-logo {
  width: 44px; height: 44px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 13px; font-weight: 700; color: var(--accent);
  margin-bottom: 14px; overflow: hidden; flex-shrink: 0;
}
.card-logo--img img {
  width: 28px; height: 28px;
  object-fit: contain; border-radius: 4px;
}
.card-logo--img span {
  display: flex; align-items: center; justify-content: center;
  width: 100%; height: 100%;
  font-size: 13px; font-weight: 700; color: var(--accent);
}

.card-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 15px; font-weight: 600;
  color: var(--text-primary); margin-bottom: 7px; line-height: 1.3;
}

.card-desc {
  flex: 1; font-size: 13px; color: var(--text-secondary);
  line-height: 1.55; margin-bottom: 14px;
  display: -webkit-box; -webkit-line-clamp: 2;
  -webkit-box-orient: vertical; overflow: hidden;
}

.card-meta {
  display: flex; align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
  padding-top: 10px; margin-top: auto;
}

.card-host {
  font-size: 11px; color: var(--text-muted);
  font-family: 'DM Sans', monospace;
}

/* ===================================
   Footer
   =================================== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
}

.footer-inner {
  max-width: 1440px; margin: 0 auto;
  padding: 48px 24px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.footer-brand-col {
  display: flex; flex-direction: column; gap: 12px;
}

.footer-brand { display: flex; align-items: center; gap: 12px; }

.footer-brand-mark {
  width: 38px; height: 38px;
  background: linear-gradient(135deg, var(--accent), var(--gold));
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700; font-size: 13px; color: #fff;
  flex-shrink: 0;
}

.footer-brand-text {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 16px; font-weight: 600; color: var(--text-primary);
}

.footer-desc {
  font-size: 13px; color: var(--text-secondary);
  line-height: 1.7;
}

.footer-social { display: flex; gap: 10px; flex-wrap: wrap; flex-direction: column; align-items: flex-end; }

.footer-qr-card {
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  padding: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  transition: var(--transition);
}
.footer-qr-card:hover { border-color: var(--accent); }

.footer-qr-img {
  width: 100px; height: 100px;
  object-fit: cover; border-radius: var(--radius-sm);
  display: block;
}

.footer-qr-label {
  font-size: 12px; color: var(--text-secondary);
}

.footer-social-item {
  display: flex; align-items: center; gap: 7px;
  padding: 8px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 13px; color: var(--text-secondary);
  transition: var(--transition); cursor: pointer;
}
.footer-social-item:hover { border-color: var(--accent); color: var(--accent); }

.footer-nav-cols {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.footer-nav-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 13px; font-weight: 600;
  color: var(--text-primary);
  text-transform: uppercase; letter-spacing: 0.8px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
}

.footer-nav-list {
  list-style: none;
  display: flex; flex-direction: column; gap: 8px;
}

.footer-nav-list a {
  font-size: 13px; color: var(--text-secondary);
  transition: var(--transition);
}
.footer-nav-list a:hover { color: var(--text-primary); padding-left: 4px; }

.footer-nav-more {
  color: var(--accent) !important;
  font-size: 12px !important;
}
.footer-nav-more:hover { color: var(--accent-hover) !important; }

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding: 18px 0;
}
.footer-bottom-inner {
  max-width: 1440px; margin: 0 auto; padding: 0 24px;
  text-align: center;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
}

.footer-bottom-links {
  display: flex; align-items: center; gap: 10px;
}

.footer-bottom-link {
  font-size: 13px; color: var(--text-secondary);
  transition: var(--transition);
}
.footer-bottom-link:hover { color: var(--accent); }

.footer-bottom-sep { color: var(--text-muted); font-size: 12px; }
.footer-copyright { font-size: 12px; color: var(--text-muted); }
.footer-copyright a { color: var(--text-secondary); }
.footer-copyright a:hover { color: var(--accent); }

@media (max-width: 1024px) {
  .footer-inner { grid-template-columns: 1fr; gap: 40px; }
  .footer-nav-cols { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .footer-nav-cols { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .footer-inner { padding: 40px 24px 32px; }
}

/* ===================================
   Back to Top
   =================================== */
/* ===================================
   Topnav QR Tooltip
   =================================== */
.topnav-qr-wrap {
  position: relative;
  display: flex; align-items: center;
}

.topnav-qr-trigger {
  color: var(--text-secondary); font-size: 14px;
  padding: 8px 14px; border-radius: var(--radius-sm);
  transition: var(--transition); cursor: pointer;
}
.topnav-qr-trigger:hover { color: var(--text-primary); background: var(--bg-card); }

.topnav-qr-popup {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 14px;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  box-shadow: 0 8px 32px rgba(15,23,42,0.12);
  opacity: 0; visibility: hidden;
  transform: translateY(8px);
  transition: var(--transition);
  white-space: nowrap; z-index: 200;
}
.topnav-qr-popup::after {
  content: '';
  position: absolute; top: -6px; right: 18px;
  width: 10px; height: 10px;
  background: var(--bg-card);
  border-left: 1px solid var(--border-color);
  border-top: 1px solid var(--border-color);
  transform: rotate(45deg);
}
.topnav-qr-wrap:hover .topnav-qr-popup {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.topnav-qr-popup img {
  width: 320px; height: auto;
  object-fit: contain; border-radius: var(--radius-sm); display: block;
}
.topnav-qr-popup span {
  font-size: 12px; color: var(--text-secondary);
}

.back-to-top {
  position: fixed; bottom: 28px; right: 28px;
  width: 46px; height: 46px;
  background: linear-gradient(135deg, var(--accent), #4f46e5);
  border: none; border-radius: 50%;
  color: #fff; font-size: 18px;
  cursor: pointer; opacity: 0; visibility: hidden;
  transition: var(--transition);
  box-shadow: 0 4px 20px var(--accent-glow);
  z-index: 100; display: flex; align-items: center; justify-content: center;
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { transform: translateY(-3px); box-shadow: 0 8px 28px var(--accent-glow); }

/* ===================================
   Responsive
   =================================== */
@media (max-width: 768px) {
  .page { padding: 0 16px; }
  .topbar { height: 56px; padding: 0 16px; }
  .drag-tip { display: none; }
  .brand-logo-img { height: 44px; }
  .hero { padding: 36px 0 24px; }
  .hero-logo { margin-bottom: 24px; }
  .hero-logo-badge { width: 52px; height: 52px; font-size: 19px; border-radius: 14px; }
  .hero-logo-copy strong { font-size: 22px; }
  .hero-logo-copy span { font-size: 13px; }
  .hero-logo-img { height: 80px; }
  .search-shell { padding: 0 4px; }
  .search-row { flex-direction: column; gap: 8px; margin-bottom: 14px; }
  .search-input { padding: 13px 16px 13px 44px; font-size: 15px; }
  .search-button { width: 100%; padding: 13px; font-size: 15px; }
  .anchor-wrap { top: 56px; }
  .anchor-bar { padding: 0 16px; gap: 6px; }
  .anchor-link { font-size: 13px; padding: 6px 12px; }
  .content { padding: 16px 0 32px; }
  .section { margin-bottom: 32px; }
  .section-head { padding: 0 4px 14px; flex-direction: row; align-items: center; }
  .section-title { font-size: 17px; }
  .cards { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .card { padding: 14px 12px; border-radius: 12px; }
  .card-logo { width: 36px; height: 36px; margin-bottom: 8px; border-radius: 9px; }
  .card-title { font-size: 13px; }
  .card-desc { font-size: 12px; -webkit-line-clamp: 2; }
  .footer-inner { padding: 32px 16px 24px; }
  .footer-bottom-inner { flex-direction: column; gap: 8px; align-items: center; text-align: center; }
  .back-to-top { bottom: 16px; right: 16px; width: 40px; height: 40px; font-size: 16px; }
  .topnav-qr-wrap { display: none; }
}

@media (max-width: 480px) {
  .page { padding: 0 12px; }
  .topnav { gap: 2px; }
  .topnav a { font-size: 13px; padding: 7px 10px; }
  .cards { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .card { padding: 12px 10px; }
  .card-logo { width: 32px; height: 32px; font-size: 12px; border-radius: 8px; }
  .card-title { font-size: 12px; margin-bottom: 4px; }
  .card-desc { display: none; }
  .card-meta { display: none; }
  .section-head { flex-direction: column; gap: 6px; }
  .section-kicker { font-size: 20px; }
  .section-title { font-size: 16px; }
  .hero-logo-mark { gap: 12px; }
  .hotline { flex-wrap: wrap; gap: 8px; }
  .hot-item { font-size: 12px; padding: 4px 10px; }
  .engine-tab { padding: 5px 14px; font-size: 12px; }
}

@media (max-width: 360px) {
  .cards { grid-template-columns: repeat(2, 1fr); gap: 6px; }
  .card { padding: 10px 8px; }
  .topbar { padding: 0 12px; }
  .search-input { padding: 12px 12px 12px 40px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}