/* ============================================================
   Conflux Design System v2 — "Obsidian" 深色主题
   灵感来源: Raycast + Linear + CleanShot X
   ============================================================ */

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

:root {
  /* Background */
  --bg-base:        #0a0a0a;
  --bg-surface:     #111111;
  --bg-elevated:    #1a1a1a;
  --bg-overlay:     rgba(255, 255, 255, 0.04);

  /* Text */
  --text-primary:   #f5f5f5;
  --text-secondary: #a0a0a0;
  --text-tertiary:  #5a5a5a;
  --text-inverse:   #0a0a0a;

  /* Accent */
  --accent:         #e8e8e8;
  --accent-text:    #0a0a0a;
  --accent-subtle:  #3a7bd5;

  /* Borders */
  --border-subtle:  rgba(255, 255, 255, 0.06);
  --border-default: rgba(255, 255, 255, 0.10);
  --border-strong:  rgba(255, 255, 255, 0.18);

  /* Shadows */
  --shadow-card:    0 1px 3px rgba(0,0,0,0.3), 0 4px 16px rgba(0,0,0,0.2);
  --shadow-screenshot: 0 24px 80px rgba(0,0,0,0.6);
  --shadow-nav:     0 1px 0 rgba(255,255,255,0.06);

  /* Layout */
  --container:      1100px;
  --font-base:      -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", sans-serif;
  --radius-sm:      8px;
  --radius:         10px;
  --radius-md:      12px;
  --radius-lg:      16px;
  --radius-xl:      20px;
  --radius-pill:    100px;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-base);
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
  position: relative;
  z-index: 1;
}

a { color: var(--text-secondary); text-decoration: none; transition: color 0.15s; }
a:hover { color: var(--text-primary); }

/* ============================================================
   Keyframe Animations
   ============================================================ */

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   Scroll Reveal
   ============================================================ */

.fade-up {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.4s ease-out, transform 0.4s ease-out;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.stagger > * { transition-delay: calc(var(--i, 0) * 60ms); }

/* ============================================================
   Buttons
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-base);
  font-size: 14px;
  font-weight: 500;
  line-height: 1;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, color 0.15s, border-color 0.15s, box-shadow 0.15s, transform 0.15s;
  border-radius: var(--radius);
  white-space: nowrap;
}

.btn-primary {
  background: #f5f5f5;
  color: #0a0a0a;
  padding: 12px 20px;
}
.btn-primary:hover {
  background: #ffffff;
  color: #0a0a0a;
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid rgba(255,255,255,0.12);
  padding: 12px 20px;
}
.btn-outline:hover {
  border-color: rgba(255,255,255,0.25);
  color: var(--text-primary);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  padding: 12px 20px;
  border: 1px solid var(--border-subtle);
}
.btn-ghost:hover {
  color: var(--text-primary);
  border-color: var(--border-default);
}

.btn-sm {
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  height: 30px;
}

.btn-lg {
  font-size: 15px;
  font-weight: 600;
  padding: 13px 26px;
}

/* ============================================================
   Navigation
   ============================================================ */

.top-bar {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: 56px;
  background: transparent;
  transition: background 0.25s, border-color 0.25s;
}

.top-bar.scrolled {
  background: rgba(10,10,10,0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.top-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-primary);
  font-size: 16px;
  font-weight: 500;
  text-decoration: none;
}
.logo-link:hover { color: var(--text-primary); }

.logo-img {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  object-fit: cover;
  flex-shrink: 0;
}

.top-bar-right {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 14px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s;
}
.nav-link:hover { color: var(--text-primary); }

/* Mobile menu */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-primary);
  padding: 4px;
}

.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(10,10,10,0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 99;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 36px;
}
.mobile-menu.open { display: flex; }
.mobile-menu .nav-link {
  font-size: 24px;
  color: var(--text-primary);
}
.mobile-menu-close {
  position: absolute;
  top: 20px;
  right: 24px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 28px;
  line-height: 1;
}

/* ============================================================
   Section Layout Helpers
   ============================================================ */

section { padding: 120px 0; }

.section-label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--text-tertiary);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.section-sub {
  font-size: 16px;
  color: var(--text-secondary);
  margin-top: 12px;
  max-width: 520px;
}

/* ============================================================
   Hero
   ============================================================ */

.hero {
  padding: 80px 0 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 200px;
  background: radial-gradient(ellipse at 50% 100%,
    rgba(255,255,255,0.03) 0%,
    transparent 70%
  );
  pointer-events: none;
}

.hero-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.05);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(52px, 6.5vw, 84px);
  font-weight: 700;
  line-height: 1.03;
  letter-spacing: -0.03em;
  color: #f5f5f5;
  max-width: 700px;
  margin-bottom: 20px;
}

.hero-sub {
  font-size: 17px;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 520px;
  margin-bottom: 0;
}

.hero-cta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 32px;
  flex-wrap: wrap;
  justify-content: center;
}

.hero-req {
  font-size: 13px;
  color: var(--text-tertiary);
  margin-top: 16px;
}

/* Screenshot */
.hero-screenshot {
  margin-top: 56px;
  width: 100%;
  max-width: 920px;
}

.screenshot-wrapper {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.06),
    0 40px 100px rgba(0,0,0,0.6),
    0 12px 30px rgba(0,0,0,0.35);
  transform: perspective(1200px) rotateX(1.5deg);
  transition: transform 0.4s ease;
}
.screenshot-wrapper:hover {
  transform: perspective(1200px) rotateX(0deg);
}

.screenshot-chrome {
  background: #1c1c1e;
  height: 28px;
  display: flex;
  align-items: center;
  padding: 0 14px;
  gap: 7px;
  flex-shrink: 0;
}

.chrome-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  flex-shrink: 0;
}
.dot-red    { background: #ff5f57; }
.dot-yellow { background: #febc2e; }
.dot-green  { background: #28c840; }

.screenshot-wrapper img {
  width: 100%;
  display: block;
  vertical-align: bottom;
}

/* ============================================================
   Features
   ============================================================ */

.features { padding: 120px 0; }

.features h2 {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-top: 8px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: 48px;
}

.feature-card {
  background: var(--bg-base);
  padding: 32px 28px;
  transition: background 0.15s;
}
.feature-card:hover { background: #0f0f0f; }

.feature-icon-wrap {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  flex-shrink: 0;
}

.feature-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 16px;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-secondary);
}

/* ============================================================
   Platforms
   ============================================================ */

.platforms { padding: 120px 0; }

.platforms h2 {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-top: 8px;
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 48px;
}

.platform-card {
  background: var(--bg-surface);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: background 0.15s, border-color 0.15s;
}
.platform-card:hover {
  background: var(--bg-elevated);
  border-color: rgba(255,255,255,0.14);
}

.platform-icon {
  width: 40px;
  height: 40px;
  margin-bottom: 12px;
  color: var(--text-primary);
  opacity: 0.9;
}

.platform-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.platform-name-zh {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 14px;
}

.platform-checks {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.check {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  color: var(--text-secondary);
  background: rgba(255,255,255,0.06);
  padding: 3px 9px;
  border-radius: var(--radius-pill);
}

.check-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #28c840;
  flex-shrink: 0;
}

.platform-detail {
  font-size: 12px;
  color: var(--text-tertiary);
}

/* ============================================================
   Tech Stats
   ============================================================ */

.tech {
  background: var(--bg-surface);
  border-top: 1px solid rgba(255,255,255,0.06);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: 64px 0;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}

.tech-item {
  text-align: center;
  padding: 16px 24px;
  position: relative;
}
.tech-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  height: 40px;
  width: 1px;
  background: rgba(255,255,255,0.08);
}

.tech-stat {
  font-size: clamp(44px, 5vw, 64px);
  font-weight: 700;
  color: #f5f5f5;
  font-variant-numeric: tabular-nums;
  line-height: 1.0;
  letter-spacing: -0.02em;
}

.tech-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 6px;
}

/* ============================================================
   Pricing
   ============================================================ */

.pricing { padding: 120px 0; text-align: center; }

.pricing h2 {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-top: 8px;
}

.pricing-card {
  max-width: 420px;
  margin: 48px auto 0;
  background: var(--bg-surface);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: 0 24px 64px rgba(0,0,0,0.4);
  text-align: left;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.pricing-card:hover {
  border-color: rgba(255,255,255,0.18);
}

.pricing-badge {
  display: inline-block;
  background: rgba(255,255,255,0.08);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 20px;
}

.pricing-amount {
  display: flex;
  align-items: flex-start;
  gap: 2px;
  color: #f5f5f5;
  line-height: 1.0;
  margin-bottom: 6px;
}

.currency {
  font-size: 28px;
  font-weight: 400;
  padding-top: 10px;
}

.price {
  font-size: clamp(56px, 7vw, 80px);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.pricing-usd {
  font-size: 14px;
  color: var(--text-tertiary);
  margin-bottom: 28px;
}

.pricing-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 28px;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  color: var(--text-secondary);
}

.pricing-features li::before {
  content: '';
  display: inline-block;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  background: rgba(255,255,255,0.10) url("data:image/svg+xml,%3Csvg width='10' height='8' viewBox='0 0 10 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 4L3.5 6.5L9 1' stroke='%23f5f5f5' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 10px no-repeat;
  border-radius: 50%;
}

#buy-license-btn {
  width: 100%;
  justify-content: center;
  font-size: 16px;
  font-weight: 600;
  padding: 14px;
  border-radius: var(--radius);
  background: #f5f5f5;
  color: #0a0a0a;
  border: none;
  cursor: pointer;
  font-family: var(--font-base);
  transition: background 0.15s;
  display: flex;
  align-items: center;
  gap: 8px;
}
#buy-license-btn:hover { background: #ffffff; }
#buy-license-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.pricing-note {
  font-size: 13px;
  color: var(--text-tertiary);
  text-align: center;
  margin-top: 14px;
}

/* ============================================================
   FAQ
   ============================================================ */

.faq { padding: 120px 0; }

.faq h2 {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-top: 8px;
}

.faq-list {
  max-width: 680px;
  margin: 48px auto 0;
}

.faq-item {
  border-bottom: 1px solid rgba(255,255,255,0.07);
}
.faq-item:first-child { border-top: 1px solid rgba(255,255,255,0.07); }

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  gap: 16px;
  transition: color 0.15s;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--text-primary); }

.faq-chevron {
  flex-shrink: 0;
  color: var(--text-tertiary);
  transition: transform 0.2s ease;
  display: flex;
  align-items: center;
}
.faq-item[open] .faq-chevron {
  transform: rotate(180deg);
}

.faq-item p {
  padding-bottom: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  animation: fadeIn 0.2s ease;
}

/* ============================================================
   Download
   ============================================================ */

.download { padding: 120px 0; text-align: center; }

.download h2 {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-top: 8px;
}

.download-btn-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: 48px;
  gap: 10px;
}

.download-main-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #f5f5f5;
  color: #0a0a0a;
  font-size: 16px;
  font-weight: 600;
  font-family: var(--font-base);
  padding: 16px 32px;
  border-radius: var(--radius-md);
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background 0.15s, transform 0.15s;
}
.download-main-btn:hover {
  background: #ffffff;
  color: #0a0a0a;
  transform: translateY(-1px);
}

.download-meta {
  font-size: 13px;
  color: var(--text-tertiary);
}

/* ============================================================
   Footer
   ============================================================ */

.footer {
  background: var(--bg-surface);
  border-top: 1px solid rgba(255,255,255,0.07);
  padding: 48px 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.footer-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  margin-bottom: 24px;
}

.footer-brand strong {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.footer-brand p {
  font-size: 13px;
  color: var(--text-tertiary);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 28px;
}
.footer-links a {
  font-size: 14px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s;
}
.footer-links a:hover {
  color: var(--text-primary);
  text-decoration: underline;
}

.footer-copy {
  font-size: 13px;
  color: var(--text-tertiary);
}

/* ============================================================
   Legal Pages (Privacy, Terms)
   ============================================================ */

.legal {
  max-width: 680px;
  margin: 0 auto;
  padding: 80px 28px 120px;
}

.legal h1 {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.legal .date {
  font-size: 13px;
  color: var(--text-tertiary);
  margin-bottom: 48px;
}

.legal h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 40px;
  margin-bottom: 12px;
}

.legal p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.legal ul,
.legal ol {
  padding-left: 20px;
  margin-bottom: 16px;
}

.legal li {
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.legal a {
  color: var(--accent-subtle);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.legal a:hover {
  color: var(--text-primary);
}

/* ============================================================
   Payment Pages
   ============================================================ */

.result-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: var(--bg-base);
}

.result-card {
  background: var(--bg-surface);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-xl);
  padding: 48px 40px;
  max-width: 480px;
  width: 100%;
  text-align: center;
  box-shadow: 0 24px 64px rgba(0,0,0,0.4);
}

.result-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 20px;
}
.result-icon.success {
  background: rgba(40, 200, 64, 0.12);
  color: #28c840;
  border: 1px solid rgba(40, 200, 64, 0.25);
}
.result-icon.cancel {
  background: rgba(255,255,255,0.06);
  color: var(--text-secondary);
  border: 1px solid rgba(255,255,255,0.10);
}

.result-title {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.result-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 28px;
}

.loading p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

.license-box {
  background: var(--bg-base);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 24px;
  text-align: left;
}

.license-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 8px;
}

.license-key {
  font-family: "SF Mono", "Monaco", "Fira Code", monospace;
  font-size: 14px;
  color: var(--text-primary);
  word-break: break-all;
  margin-bottom: 14px;
  line-height: 1.5;
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.08);
  color: var(--text-secondary);
  border: 1px solid rgba(255,255,255,0.10);
  font-family: var(--font-base);
  font-size: 13px;
  font-weight: 500;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.copy-btn:hover { background: rgba(255,255,255,0.12); color: var(--text-primary); }
.copy-btn.copied { background: rgba(40,200,64,0.12); color: #28c840; border-color: rgba(40,200,64,0.2); }

.result-steps {
  list-style: none;
  text-align: left;
  margin-bottom: 24px;
  counter-reset: steps;
}
.result-steps li {
  counter-increment: steps;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14px;
  color: var(--text-secondary);
  padding: 8px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.result-steps li:last-child { border-bottom: none; }
.result-steps li::before {
  content: counter(steps);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  background: rgba(255,255,255,0.08);
  border-radius: 50%;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-tertiary);
  margin-top: 1px;
}

.error-msg {
  font-size: 14px;
  color: #ff5f57;
  background: rgba(255, 95, 87, 0.08);
  border: 1px solid rgba(255, 95, 87, 0.15);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-bottom: 16px;
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 960px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .platform-grid { grid-template-columns: repeat(2, 1fr); }
  .tech-grid { grid-template-columns: repeat(2, 2fr); }
  .tech-item:nth-child(2)::after { display: none; }
  .tech-item:nth-child(2) { border-right: none; }
}

@media (max-width: 640px) {
  .container { padding: 0 20px; }
  section { padding: 80px 0; }

  .top-bar-right .nav-link { display: none; }
  .top-bar-right .btn-sm { display: none; }
  .menu-toggle { display: flex; }

  .hero { padding: 60px 0 0; }
  .hero h1 { font-size: 38px; }
  .hero-cta { flex-direction: column; width: 100%; }
  .hero-cta .btn { width: 100%; justify-content: center; }

  .screenshot-wrapper {
    transform: none;
  }
  .screenshot-wrapper:hover { transform: none; }

  .feature-grid { grid-template-columns: 1fr; }
  .platform-grid { grid-template-columns: repeat(2, 1fr); }
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .tech-item:nth-child(2)::after { display: none; }
  .tech-item:nth-child(4)::after { display: none; }
  .tech-item:nth-child(odd)::after { display: block; }
  .tech-item:nth-child(even)::after { display: none; }

  .pricing-card { padding: 28px 24px; }

  .footer-top {
    flex-direction: column;
    gap: 24px;
  }
  .footer-links {
    flex-wrap: wrap;
    gap: 16px;
  }

  .result-card { padding: 32px 24px; }
}