/* ============================================================
   OpenClaw 中文版 — index.css
   VI-compliant styles: Clash Display + Satoshi, coral palette,
   dark/light theme, cosmic background
   ============================================================ */

/* ---------- CSS Variables ---------- */
:root {
  /* Brand Colors */
  --coral-bright: #FF4D4D;
  --coral-deep: #E63946;
  --coral-glow: #FF6B6B;
  --teal-glow: #00e5cc;
  --teal-dim: #00b3a0;

  /* Logo Gradient */
  --logo-gradient-start: #FF4D4D;
  --logo-gradient-end: #FF8A65;

  /* Spacing */
  --section-gap: 5rem;
  --container-max: 960px;
}

/* ---------- Theme: Dark (default) ---------- */
[data-theme="dark"] {
  --bg-primary: #050810;
  --bg-secondary: #0a0f1a;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-card-hover: rgba(255, 255, 255, 0.08);
  --text-primary: #e8e6e3;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 77, 77, 0.3);
  --code-bg: #0d1117;
  --code-border: rgba(255, 255, 255, 0.06);
  --shadow-glow: 0 0 60px rgba(255, 77, 77, 0.08);
}

/* ---------- Theme: Light ---------- */
[data-theme="light"] {
  --bg-primary: #faf9f7;
  --bg-secondary: #f0eeeb;
  --bg-card: rgba(0, 0, 0, 0.03);
  --bg-card-hover: rgba(0, 0, 0, 0.06);
  --text-primary: #1a1a1a;
  --text-secondary: #555;
  --text-muted: #888;
  --border-color: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(255, 77, 77, 0.3);
  --code-bg: #f5f3f0;
  --code-border: rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 0 60px rgba(255, 77, 77, 0.05);
  --logo-gradient-start: #E63946;
  --logo-gradient-end: #D84315;
}

/* Sponsor logo theme switching */
[data-theme="dark"] .sponsor-logo-light { display: none; }
[data-theme="dark"] .sponsor-logo-dark { display: block; }
[data-theme="dark"] .sponsor-logo-invert { filter: none; }
[data-theme="light"] .sponsor-logo-dark { display: none; }
[data-theme="light"] .sponsor-logo-light { display: block; }
[data-theme="light"] .sponsor-logo-invert { filter: invert(1); }

/* Stars & nebula hide in light mode */
[data-theme="light"] .bg-stars,
[data-theme="light"] .bg-nebula {
  opacity: 0;
}

/* ---------- Base ---------- */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: 'Satoshi', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-weight: 400;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

a {
  color: var(--coral-bright);
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover {
  color: var(--coral-glow);
}

h1, h2, h3, h4 {
  font-family: 'Clash Display', 'Satoshi', sans-serif;
  font-weight: 700;
  line-height: 1.2;
  margin: 0;
}

/* ---------- Background Effects ---------- */
.bg-stars {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    radial-gradient(1px 1px at 20% 30%, rgba(255,255,255,0.3) 0%, transparent 100%),
    radial-gradient(1px 1px at 40% 70%, rgba(255,255,255,0.2) 0%, transparent 100%),
    radial-gradient(1px 1px at 60% 20%, rgba(255,255,255,0.25) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 80% 50%, rgba(255,255,255,0.15) 0%, transparent 100%),
    radial-gradient(1px 1px at 10% 80%, rgba(255,255,255,0.2) 0%, transparent 100%),
    radial-gradient(1px 1px at 70% 90%, rgba(255,255,255,0.18) 0%, transparent 100%),
    radial-gradient(1px 1px at 50% 10%, rgba(255,255,255,0.22) 0%, transparent 100%);
  transition: opacity 0.5s ease;
}

.bg-nebula {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 600px 400px at 20% 50%, rgba(255,77,77,0.04) 0%, transparent 70%),
    radial-gradient(ellipse 500px 300px at 80% 30%, rgba(0,229,204,0.03) 0%, transparent 70%);
  transition: opacity 0.5s ease;
}

/* ---------- Theme Toggle ---------- */
.theme-toggle {
  position: fixed;
  top: 1.25rem;
  right: 1.25rem;
  z-index: 1000;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--text-primary);
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.2s, background 0.2s, transform 0.2s;
}
.theme-toggle:hover {
  border-color: var(--coral-bright);
  transform: scale(1.1);
}

/* ---------- Container ---------- */
.oc-container {
  position: relative;
  z-index: 1;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
}

/* ---------- Hero ---------- */
.oc-hero {
  padding-top: 6rem;
  padding-bottom: 2rem;
}

.oc-logo svg {
  width: 90px;
  height: 90px;
  margin-bottom: 1.5rem;
  filter: drop-shadow(0 0 20px rgba(255, 77, 77, 0.2));
}

.oc-logo .claw-body,
.oc-logo .claw-left,
.oc-logo .claw-right {
  transition: filter 0.3s;
}

.oc-logo .antenna {
  animation: antennaWiggle 3s ease-in-out infinite;
  transform-origin: center;
}
@keyframes antennaWiggle {
  0%, 100% { transform: rotate(0deg); }
  25% { transform: rotate(3deg); }
  75% { transform: rotate(-3deg); }
}

.oc-logo .eye-glow {
  animation: eyePulse 2s ease-in-out infinite;
}
@keyframes eyePulse {
  0%, 100% { opacity: 1; r: 2; }
  50% { opacity: 0.6; r: 2.5; }
}

.oc-title {
  font-size: clamp(2.8rem, 8vw, 4.5rem);
  font-weight: 700;
  background: linear-gradient(135deg, var(--coral-bright), var(--coral-glow), var(--teal-glow));
  background-size: 200% 200%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 6s ease-in-out infinite;
  margin-bottom: 0.5rem;
}
@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.oc-tagline {
  font-family: 'Clash Display', sans-serif;
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.oc-description {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 580px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ---------- Section ---------- */
.oc-section {
  margin-top: var(--section-gap);
}

.oc-section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.oc-section-header h2 {
  font-size: clamp(1.4rem, 3vw, 1.8rem);
  font-weight: 600;
}

.claw-accent {
  color: var(--coral-bright);
  margin-right: 0.4rem;
  font-weight: 700;
}

.section-link {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color 0.2s;
}
.section-link:hover {
  color: var(--coral-bright);
}

/* ---------- Latest Post ---------- */
.oc-latest-post {
  margin-top: 2.5rem;
}
.latest-post-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.25rem;
  border-radius: 999px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  transition: border-color 0.2s, background 0.2s;
  font-size: 0.95rem;
}
.latest-post-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  color: var(--text-primary);
}
.badge-new {
  background: var(--coral-bright);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  flex-shrink: 0;
}
.latest-post-title {
  flex: 1;
}
.latest-post-arrow {
  color: var(--text-muted);
  flex-shrink: 0;
}

/* ---------- Testimonials ---------- */
.testimonials-track {
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent 0%, #000 5%, #000 95%, transparent 100%);
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, #000 5%, #000 95%, transparent 100%);
}

.testimonials-row {
  display: flex;
  gap: 1rem;
  animation: scrollLeft 60s linear infinite;
  width: max-content;
}
.testimonials-row:hover {
  animation-play-state: paused;
}

@keyframes scrollLeft {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.testimonial-card {
  flex-shrink: 0;
  width: 320px;
  display: flex;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  border-radius: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  transition: border-color 0.2s;
}
.testimonial-card:hover {
  border-color: var(--border-hover);
}

.testimonial-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  flex-shrink: 0;
  object-fit: cover;
}

.testimonial-content p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin: 0 0 0.5rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 5;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.testimonial-author {
  font-size: 0.78rem;
  color: var(--coral-bright);
  font-weight: 500;
}

/* ---------- Code Block ---------- */
.code-block {
  border-radius: 12px;
  overflow: hidden;
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  box-shadow: var(--shadow-glow);
}

.code-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--code-border);
}
.code-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-muted);
  opacity: 0.4;
}
.code-dot:nth-child(1) { background: #FF5F56; opacity: 0.8; }
.code-dot:nth-child(2) { background: #FFBD2E; opacity: 0.8; }
.code-dot:nth-child(3) { background: #27C93F; opacity: 0.8; }

.mode-switch {
  display: flex;
  gap: 0.25rem;
  margin-left: auto;
}
.mode-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  font-family: 'Satoshi', sans-serif;
  font-size: 0.8rem;
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
}
.mode-btn:hover {
  color: var(--text-primary);
}
.mode-btn.active {
  background: var(--bg-card-hover);
  color: var(--coral-bright);
  border-color: var(--border-color);
}

.code-content {
  padding: 1rem 1.25rem;
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  font-size: 0.88rem;
  line-height: 1.8;
}

.code-line {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.code-comment {
  color: var(--text-muted);
  font-style: italic;
}
.code-cmd {
  position: relative;
}
.code-cmd code {
  color: var(--text-primary);
  flex: 1;
}
.code-prompt {
  color: var(--coral-bright);
  user-select: none;
  font-weight: 700;
}

.copy-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-size: 0.85rem;
  transition: color 0.2s, background 0.2s;
  margin-left: auto;
  flex-shrink: 0;
}
.copy-btn:hover {
  color: var(--coral-bright);
  background: var(--bg-card);
}
.copy-btn.copied {
  color: var(--teal-glow);
}

.quickstart-note {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 1rem;
}

/* ---------- Features ---------- */
.feature-card {
  display: block;
  padding: 1.5rem;
  border-radius: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  height: 100%;
  transition: border-color 0.2s, background 0.2s, transform 0.2s;
}
.feature-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  color: var(--text-primary);
  transform: translateY(-2px);
}
.feature-icon {
  font-size: 1.6rem;
  color: var(--coral-bright);
  margin-bottom: 0.75rem;
}
.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.feature-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.7;
}

/* ---------- Integrations ---------- */
.integrations-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
}
.integration-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: border-color 0.2s, color 0.2s;
}
.integration-pill:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
}
.integration-pill i {
  font-size: 0.95rem;
}

.integrations-links {
  text-align: center;
  margin-top: 1.5rem;
  font-size: 0.9rem;
}
.integrations-links a {
  color: var(--text-muted);
}
.integrations-links a:hover {
  color: var(--coral-bright);
}
.link-sep {
  color: var(--text-muted);
  margin: 0 0.5rem;
}

/* ---------- Press ---------- */
.press-card {
  display: block;
  padding: 1.5rem;
  border-radius: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  height: 100%;
  transition: border-color 0.2s, background 0.2s;
}
.press-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  color: var(--text-primary);
}
.press-featured {
  border-color: rgba(255, 77, 77, 0.15);
}
.press-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-muted);
}
.press-logo i {
  font-size: 1.2rem;
}
.press-card blockquote {
  font-family: 'Clash Display', sans-serif;
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.6;
  margin: 0 0 0.75rem;
  color: var(--text-primary);
}
.press-card cite {
  font-style: normal;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ---------- CTA Grid ---------- */
.oc-cta-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-top: var(--section-gap);
}
.cta-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  padding: 1.25rem 1rem;
  border-radius: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  text-align: center;
  transition: border-color 0.2s, background 0.2s, transform 0.2s;
}
.cta-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  color: var(--text-primary);
  transform: translateY(-2px);
}
.cta-card i {
  font-size: 1.5rem;
  color: var(--coral-bright);
}
.cta-card strong {
  font-size: 0.95rem;
}
.cta-card span {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ---------- Newsletter ---------- */
.oc-newsletter {
  text-align: center;
}
.oc-newsletter h2 {
  font-size: clamp(1.4rem, 3vw, 1.8rem);
  margin-bottom: 0.75rem;
}
.oc-newsletter > p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}
.newsletter-form {
  max-width: 440px;
  margin: 0 auto;
}
.newsletter-form .form-control {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  border-radius: 8px 0 0 8px;
  padding: 0.6rem 1rem;
  font-family: 'Satoshi', sans-serif;
}
.newsletter-form .form-control::placeholder {
  color: var(--text-muted);
}
.newsletter-form .form-control:focus {
  border-color: var(--coral-bright);
  box-shadow: 0 0 0 2px rgba(255, 77, 77, 0.15);
  background: var(--bg-card);
  color: var(--text-primary);
}
.btn-coral {
  background: var(--coral-bright);
  border: 1px solid var(--coral-bright);
  color: #fff;
  font-family: 'Satoshi', sans-serif;
  font-weight: 600;
  border-radius: 0 8px 8px 0;
  padding: 0.6rem 1.2rem;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: background 0.2s;
}
.btn-coral:hover {
  background: var(--coral-deep);
  border-color: var(--coral-deep);
  color: #fff;
}

/* ---------- Sponsors ---------- */
.oc-sponsors h2 {
  font-size: clamp(1.2rem, 2.5vw, 1.5rem);
  margin-bottom: 2rem;
}
.sponsors-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 2.5rem;
}
.sponsor-item {
  opacity: 0.5;
  transition: opacity 0.2s;
}
.sponsor-item:hover {
  opacity: 0.8;
}
.sponsor-item img {
  height: 28px;
  width: auto;
  display: block;
}

/* ---------- Footer ---------- */
.oc-footer {
  margin-top: var(--section-gap);
  padding: 2rem 0;
  text-align: center;
  border-top: 1px solid var(--border-color);
}
.footer-nav {
  margin-bottom: 1.25rem;
  font-size: 0.9rem;
}
.footer-nav a {
  color: var(--text-muted);
  transition: color 0.2s;
}
.footer-nav a:hover {
  color: var(--coral-bright);
}
.footer-sep {
  color: var(--text-muted);
  margin: 0 0.4rem;
}
.oc-footer p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0 0 0.5rem;
}
.oc-footer p a {
  color: var(--text-secondary);
}
.oc-footer p a:hover {
  color: var(--coral-bright);
}
.footer-disclaimer {
  font-size: 0.78rem !important;
  color: var(--text-muted) !important;
  opacity: 0.6;
}

/* ---------- Scroll-triggered Animations ---------- */
.oc-hero,
.oc-section,
.oc-cta-grid {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.oc-hero.visible,
.oc-section.visible,
.oc-cta-grid.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  :root {
    --section-gap: 3.5rem;
  }

  .oc-hero {
    padding-top: 4rem;
  }

  .oc-cta-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .testimonial-card {
    width: 280px;
  }

  .latest-post-card {
    font-size: 0.88rem;
  }
}

@media (max-width: 480px) {
  .oc-container {
    padding: 0 1rem 2rem;
  }

  .oc-cta-grid {
    grid-template-columns: 1fr;
  }

  .code-header {
    flex-wrap: wrap;
  }

  .mode-switch {
    margin-left: 0;
    margin-top: 0.5rem;
  }

  .code-content {
    font-size: 0.8rem;
    padding: 0.75rem 1rem;
    overflow-x: auto;
  }
}

/* ---------- Utility: hide Bootstrap default focus ring, keep custom ---------- */
.btn:focus-visible,
.form-control:focus-visible {
  outline: 2px solid var(--coral-bright);
  outline-offset: 2px;
}

/* FAQ Section */
.faq-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

@media (max-width: 1024px) {
  .faq-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .faq-grid {
    grid-template-columns: 1fr;
  }
}

.faq-item {
  background: var(--card-bg, rgba(10, 20, 30, 0.6));
  backdrop-filter: blur(4px);
  border-radius: 0.875rem;
  padding: 1.125rem 1.25rem;
  border: 1px solid var(--border-color, rgba(255, 255, 255, 0.08));
  transition: all 0.2s ease;
  cursor: pointer;
}

.faq-item:hover {
  border-color: var(--coral, #FF4D4D);
  transform: translateY(-2px);
}

.faq-question {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary, #fff);
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.faq-question i {
  color: var(--coral, #FF4D4D);
  font-size: 1.1rem;
  flex-shrink: 0;
}

.faq-answer {
  color: var(--text-secondary, rgba(255, 255, 255, 0.7));
  line-height: 1.55;
  font-size: 0.85rem;
}

.faq-answer code {
  background: rgba(0, 0, 0, 0.4);
  padding: 0.2rem 0.4rem;
  border-radius: 0.25rem;
  font-size: 0.8rem;
  color: var(--coral, #FF4D4D);
  word-break: break-all;
}

.faq-answer strong {
  color: var(--coral, #FF4D4D);
  font-weight: 600;
}