:root {
  --bg: #0a0d18;
  --bg-2: #0f1426;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-2: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.08);
  --border-2: rgba(255, 255, 255, 0.14);
  --text: #f3f5fb;
  --text-2: rgba(243, 245, 251, 0.78);
  --text-3: rgba(243, 245, 251, 0.55);
  --text-4: rgba(243, 245, 251, 0.35);
  --brand: #7c9eff;
  --brand-2: #a78bfa;
  --accent: #5eead4;
  --danger: #ff7a7a;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow-lg: 0 30px 80px -20px rgba(124, 158, 255, 0.25), 0 20px 50px -20px rgba(167, 139, 250, 0.18);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-2);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.9em;
  color: var(--text);
}
strong { color: var(--text); font-weight: 600; }

/* ---- Layout ---- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 28px;
}
.section {
  padding: 100px 0;
  position: relative;
}
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 60px;
}
.section-title {
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.2;
  font-weight: 700;
  color: var(--text);
  margin: 8px 0 14px;
  letter-spacing: -0.02em;
}
.section-sub {
  font-size: 17px;
  color: var(--text-3);
  margin: 0;
}
.kicker {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--brand);
  background: rgba(124, 158, 255, 0.12);
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(124, 158, 255, 0.25);
}
.grad-text {
  background: linear-gradient(135deg, #7c9eff 0%, #a78bfa 60%, #5eead4 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---- Decorative background ---- */
.bg-decor {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}
.bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.45;
  animation: orb-drift 20s ease-in-out infinite;
}
.bg-orb-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, #7c9eff 0%, transparent 70%);
  top: -200px; left: -100px;
}
.bg-orb-2 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, #a78bfa 0%, transparent 70%);
  top: 30%; right: -150px;
  animation-delay: -8s;
}
.bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 50% at 50% 30%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 50% at 50% 30%, #000 30%, transparent 80%);
}
@keyframes orb-drift {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50%      { transform: translate(40px, -30px) scale(1.08); }
}

/* ---- Header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(10, 13, 24, 0.6);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--text);
  font-size: 16px;
  letter-spacing: -0.01em;
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px; height: 32px;
  background: linear-gradient(135deg, #7c9eff, #a78bfa);
  border-radius: 8px;
  box-shadow: 0 4px 14px rgba(124, 158, 255, 0.35);
}
.brand-mark { background: transparent !important; box-shadow: none !important; padding: 0; }
.brand-mark img { display: block; width: 32px; height: 32px; }
.nav { display: flex; gap: 28px; align-items: center; }
.nav a { font-size: 14px; color: var(--text-2); transition: color 0.15s; }
.nav a:hover { color: var(--text); }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.18s ease;
  border: 1px solid transparent;
  white-space: nowrap;
  text-decoration: none;
}
.btn-sm { padding: 8px 14px; font-size: 13px; }
.nav-cta {
  padding: 7px 14px;
  border-radius: 8px;
  background: linear-gradient(135deg, #7c9eff 0%, #a78bfa 100%);
  color: #0a0d18 !important;
  font-size: 13px;
  font-weight: 600;
  transition: all 0.18s ease;
  box-shadow: 0 4px 14px rgba(124, 158, 255, 0.35);
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 6px 18px rgba(124, 158, 255, 0.5); }

.btn-lg { padding: 14px 24px; font-size: 15px; border-radius: 12px; }
.btn-primary {
  background: linear-gradient(135deg, #7c9eff 0%, #a78bfa 100%);
  color: #0a0d18;
  box-shadow: 0 6px 20px rgba(124, 158, 255, 0.4);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 30px rgba(124, 158, 255, 0.55);
}
.btn-ghost {
  background: var(--surface);
  border-color: var(--border-2);
  color: var(--text);
}
.btn-ghost:hover {
  background: var(--surface-2);
  border-color: rgba(124, 158, 255, 0.4);
}

/* ---- HERO ---- */
.hero {
  padding: 100px 0 80px;
  position: relative;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 60px;
  align-items: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(124, 158, 255, 0.1);
  border: 1px solid rgba(124, 158, 255, 0.2);
  border-radius: 999px;
  font-size: 12px;
  color: var(--brand);
  font-weight: 500;
  margin-bottom: 20px;
}
.eyebrow .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}
.title {
  font-size: clamp(40px, 6vw, 68px);
  line-height: 1.08;
  font-weight: 800;
  color: var(--text);
  margin: 0 0 22px;
  letter-spacing: -0.03em;
}
.subtitle {
  font-size: 18px;
  color: var(--text-3);
  margin: 0 0 32px;
  max-width: 540px;
}
.cta-row { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 22px; }
.hero-meta {
  font-size: 13px;
  color: var(--text-4);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.kbd {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
  font-weight: 600;
  color: var(--text);
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--border-2);
  border-bottom-width: 2px;
  border-radius: 5px;
  letter-spacing: 0.04em;
}
.sep { color: var(--text-4); }

/* ---- Hero Visual (mock app) ---- */
.hero-visual {
  position: relative;
  height: 480px;
}
.mock-window {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(20, 26, 50, 0.85), rgba(10, 13, 24, 0.85));
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.window-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: rgba(0, 0, 0, 0.2);
  border-bottom: 1px solid var(--border);
}
.window-bar .dot { width: 10px; height: 10px; border-radius: 50%; }
.dot.red    { background: #ff5f57; }
.dot.amber  { background: #febc2e; }
.dot.green  { background: #28c840; }
.window-title {
  margin-left: auto; margin-right: auto;
  font-size: 12px;
  color: var(--text-4);
}
.window-body { padding: 24px; }
.mock-palette {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.mock-search {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-3);
}
.mock-search .placeholder { flex: 1; font-size: 14px; }
.cursor-blink { color: var(--brand); animation: blink 1s infinite; font-weight: 300; }
@keyframes blink { 0%, 50% { opacity: 1; } 50.01%, 100% { opacity: 0; } }
.mock-results { list-style: none; padding: 6px; margin: 0; }
.mock-results li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.1s;
}
.mock-results li.active {
  background: rgba(124, 158, 255, 0.15);
  border: 1px solid rgba(124, 158, 255, 0.3);
}
.result-icon { font-size: 18px; }
.result-title { font-size: 14px; color: var(--text); font-weight: 500; }
.result-meta { font-size: 11px; color: var(--text-4); margin-top: 2px; }

/* Floating hint cards */
.float-card {
  position: absolute;
  background: rgba(20, 26, 50, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border-2);
  border-radius: 12px;
  padding: 12px 14px;
  display: flex;
  gap: 10px;
  align-items: center;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
  font-size: 12px;
  animation: float 6s ease-in-out infinite;
}
.float-card b { font-size: 13px; }
.float-card small { color: var(--text-4); }
.float-card .kc-icon {
  font-size: 22px;
  display: inline-flex;
  width: 36px; height: 36px;
  align-items: center;
  justify-content: center;
  background: rgba(124, 158, 255, 0.12);
  border-radius: 8px;
}
.float-card-1 {
  bottom: -22px; left: -28px;
  animation-delay: -2s;
}
.float-card-2 {
  top: 24px; right: -32px;
  border-color: rgba(94, 234, 212, 0.3);
}
.float-card-2 .kc-icon { background: rgba(94, 234, 212, 0.12); }
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-8px); }
}

/* ---- Pain ---- */
.pain { background: linear-gradient(180deg, transparent, rgba(124, 158, 255, 0.03), transparent); }
.pain-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 50px;
}
.pain-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 22px;
  transition: all 0.2s;
}
.pain-card:hover {
  border-color: rgba(124, 158, 255, 0.3);
  transform: translateY(-2px);
}
.pain-emoji { font-size: 32px; margin-bottom: 14px; }
.pain-title { font-size: 16px; color: var(--text); font-weight: 600; margin-bottom: 8px; }
.pain-desc { font-size: 14px; color: var(--text-3); line-height: 1.6; }
.pain-summary {
  margin-top: 50px;
  text-align: center;
  font-size: 22px;
  color: var(--text-2);
  padding: 30px;
  background: linear-gradient(135deg, rgba(124, 158, 255, 0.06), rgba(167, 139, 250, 0.06));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

/* ---- Features ---- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
}
.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: all 0.2s;
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 50%, rgba(124, 158, 255, 0.06) 100%);
  opacity: 0;
  transition: opacity 0.2s;
}
.feature-card:hover {
  border-color: rgba(124, 158, 255, 0.3);
  transform: translateY(-3px);
}
.feature-card:hover::before { opacity: 1; }
.feature-card h3 {
  font-size: 18px;
  color: var(--text);
  margin: 16px 0 8px;
  font-weight: 600;
  position: relative;
}
.feature-card p {
  font-size: 14px;
  color: var(--text-3);
  margin: 0;
  line-height: 1.65;
  position: relative;
}
.feat-icon {
  width: 48px; height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  border-radius: 12px;
  position: relative;
}
.icon-bg-1 { background: rgba(124, 158, 255, 0.18); color: #7c9eff; }
.icon-bg-2 { background: rgba(94, 234, 212, 0.18); color: #5eead4; }
.icon-bg-3 { background: rgba(167, 139, 250, 0.18); color: #a78bfa; }
.icon-bg-4 { background: rgba(251, 191, 36, 0.18); color: #fbbf24; }
.icon-bg-5 { background: rgba(244, 114, 182, 0.18); color: #f472b6; }
.icon-bg-6 { background: rgba(96, 165, 250, 0.18); color: #60a5fa; }

/* ---- How ---- */
.how-steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 18px;
  max-width: 760px;
  margin: 0 auto;
}
.how-step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 30px;
  transition: all 0.2s;
}
.how-step:hover { border-color: rgba(124, 158, 255, 0.3); }
.how-num {
  font-size: 28px;
  font-weight: 700;
  background: linear-gradient(135deg, #7c9eff, #a78bfa);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: -0.02em;
  line-height: 1;
}
.how-body h3 {
  font-size: 17px;
  color: var(--text);
  margin: 0 0 6px;
  font-weight: 600;
}
.how-body p { margin: 0; font-size: 14px; color: var(--text-3); line-height: 1.65; }

/* ---- Tech ---- */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}
.tech-card {
  background: linear-gradient(160deg, rgba(124, 158, 255, 0.06), rgba(255, 255, 255, 0.02));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px;
  position: relative;
}
.tech-num {
  font-size: 11px;
  color: var(--brand);
  font-weight: 700;
  letter-spacing: 0.15em;
  margin-bottom: 14px;
  opacity: 0.7;
}
.tech-card h3 {
  font-size: 18px;
  color: var(--text);
  margin: 0 0 8px;
  font-weight: 600;
}
.tech-card p { font-size: 14px; color: var(--text-3); margin: 0; line-height: 1.65; }

/* ---- Download ---- */
.download { padding-bottom: 120px; }
.download-card {
  text-align: center;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(124, 158, 255, 0.12), transparent),
    linear-gradient(180deg, rgba(20, 26, 50, 0.6), rgba(10, 13, 24, 0.6));
  border: 1px solid var(--border-2);
  border-radius: var(--radius-lg);
  padding: 70px 40px;
  box-shadow: var(--shadow-lg);
}
.download-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin: 32px 0 24px; }
.download-meta {
  display: flex;
  gap: 18px;
  justify-content: center;
  font-size: 13px;
  color: var(--text-3);
  margin-bottom: 50px;
  flex-wrap: wrap;
}
.download-meta span { color: var(--text-2); }
.download-platforms {
  display: grid;
  grid-template-columns: repeat(3, minmax(120px, 200px));
  gap: 14px;
  justify-content: center;
  max-width: 640px;
  margin: 0 auto;
}
.plat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 14px;
  opacity: 0.55;
  transition: all 0.2s;
}
.plat-current {
  opacity: 1;
  border-color: rgba(124, 158, 255, 0.4);
  background: linear-gradient(160deg, rgba(124, 158, 255, 0.1), rgba(167, 139, 250, 0.05));
}
.plat-icon { font-size: 28px; margin-bottom: 8px; }
.plat-name { font-size: 14px; font-weight: 600; color: var(--text); }
.plat-status { font-size: 12px; color: var(--text-4); margin-top: 4px; }

/* ---- Footer ---- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 36px 0;
  margin-top: 40px;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--text-4);
}
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 600;
}
.footer-meta { display: inline-flex; gap: 10px; align-items: center; flex-wrap: wrap; }

/* ---- Reveal animation ---- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Responsive ---- */
@media (max-width: 920px) {
  .hero-inner { grid-template-columns: 1fr; gap: 50px; }
  .hero-visual { height: 380px; max-width: 480px; margin: 0 auto; }
  .section { padding: 70px 0; }
  .float-card-1 { left: -8px; bottom: -16px; }
  .float-card-2 { right: -8px; top: 8px; }
}
@media (max-width: 640px) {
  .container { padding: 0 20px; }
  .nav { gap: 14px; }
  .nav a:not(.btn) { display: none; }
  .hero { padding: 60px 0 40px; }
  .title { font-size: 40px; }
  .subtitle { font-size: 16px; }
  .cta-row .btn { width: 100%; }
  .download-card { padding: 50px 24px; }
  .download-platforms { grid-template-columns: 1fr; max-width: 280px; }
  .hero-meta { font-size: 12px; }
}


/* Chrome extension section */
.extension-install { margin-top: 36px; text-align: left; }
.extension-install .section-sub { margin-bottom: 18px; }
.extension-install .how-steps { text-align: left; }
.extension-install .how-num { font-size: 22px; }
.extension-tips {
  margin-top: 24px;
  padding: 18px 22px;
  border: 1px dashed rgba(124, 158, 255, 0.25);
  border-radius: 12px;
  background: rgba(124, 158, 255, 0.04);
}
.extension-tips h4 {
  margin: 0 0 10px;
  font-size: 15px;
  color: var(--text-1);
}
.extension-tips ul {
  margin: 0;
  padding-left: 20px;
  color: var(--text-2);
  line-height: 1.7;
  font-size: 14px;
}
.extension-tips code {
  background: rgba(255,255,255,0.06);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 13px;
}