/* =========================================================
   ThinkingAI 官网主题 - CSS
   仿站自 www.thinkingai.cn
   主色: #004BFF (品牌蓝)
   ========================================================= */

:root {
  --primary: #004BFF;
  --primary-dark: #0036cc;
  --primary-light: #2C6AFF;
  --primary-soft: #E6F0FF;
  --bg: #ffffff;
  --bg-alt: #F8FAFC;
  --bg-card: #ffffff;
  --text: #0f172a;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --border: #E2E8F0;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 4px 24px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 48px rgba(0,0,0,0.08);
  --font: 'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
}

*, ::before, ::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: var(--primary); text-decoration: none; transition: all 0.2s; }
a:hover { color: var(--primary-dark); }

img { max-width: 100%; height: auto; display: block; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-label {
  display: inline-block;
  padding: 4px 16px;
  background: var(--primary-soft);
  color: var(--primary);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 12px;
}

.section-title {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 640px;
  margin-bottom: 48px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary) 0%, #6366f1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* =========================================================
   BUTTONS
   ========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 15px;
  transition: all 0.25s;
  border: none;
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 16px rgba(0,75,255,0.25);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(0,75,255,0.35);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-1px);
}

.btn-lg { padding: 16px 36px; font-size: 17px; }
.btn-block { width: 100%; }

/* =========================================================
   NAVBAR
   ========================================================= */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: all 0.3s;
}

.navbar.scrolled {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 10px 0;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo .logo-img { height: 32px; width: auto; }

.nav-links { display: flex; align-items: center; gap: 32px; }

.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s;
}
.nav-link:hover { color: var(--text); }

.nav-cta {
  padding: 10px 24px;
  background: var(--primary);
  color: #fff;
  border-radius: 50px;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.2s;
}
.nav-cta:hover { background: var(--primary-dark); transform: translateY(-1px); color: #fff; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s;
}

/* =========================================================
   HERO
   ========================================================= */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  position: relative;
  overflow: hidden;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,75,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,75,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero-glow {
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(0,75,255,0.04) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 2;
  width: 100%;
}

.hero-title {
  font-size: 56px;
  font-weight: 800;
  letter-spacing: -2px;
  line-height: 1.05;
  color: var(--text);
  margin-bottom: 4px;
}

.hero-subtitle {
  font-size: 48px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary) 0%, #6366f1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
  letter-spacing: -1px;
}

.hero-desc {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 480px;
}

.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }

/* Terminal Card */
.terminal-card {
  width: 100%;
  max-width: 520px;
  background: #0f172a;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.15);
  border: 1px solid rgba(255,255,255,0.06);
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 20px;
  background: rgba(255,255,255,0.03);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.term-dot { width: 10px; height: 10px; border-radius: 50%; }
.term-red { background: #ff5f56; }
.term-yellow { background: #ffbd2e; }
.term-green { background: #27c93f; }

.term-title {
  margin-left: auto;
  font-size: 12px;
  color: rgba(255,255,255,0.3);
  font-family: 'SF Mono', 'Fira Code', monospace;
}

.terminal-body { padding: 24px; font-family: 'SF Mono', 'Fira Code', monospace; font-size: 13px; line-height: 1.8; }

.terminal-line { margin-bottom: 4px; }
.prompt { color: #27c93f; }
.cmd { color: #e2e8f0; }
.result { color: #60a5fa; }
.status-line { color: rgba(255,255,255,0.5); }
.status-dot { display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: #27c93f; margin-right: 6px; animation: pulse-dot 2s infinite; }
.badge-agent {
  display: inline-block;
  padding: 2px 10px;
  background: rgba(39,201,63,0.1);
  border: 1px solid rgba(39,201,63,0.2);
  color: #27c93f;
  border-radius: 12px;
  font-size: 11px;
  margin-left: 8px;
}
.blink { animation: blink 1s step-end infinite; }

@keyframes pulse-dot { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: 0; } }

/* =========================================================
   CLIENTS
   ========================================================= */
.clients {
  padding: 60px 0;
  text-align: center;
  border-top: 1px solid var(--border);
}

.clients-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 28px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.client-logos {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}

.client-logo {
  height: 24px;
  width: auto;
  opacity: 0.35;
  filter: grayscale(1);
  transition: all 0.3s;
}

.client-logo:hover { opacity: 0.6; filter: grayscale(0); }

/* =========================================================
   SLOGAN
   ========================================================= */
.slogan-section {
  padding: 80px 0;
  text-align: center;
  background: linear-gradient(180deg, var(--primary-soft) 0%, var(--bg) 100%);
}

.slogan-title {
  font-size: 42px;
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 16px;
}

.slogan-desc {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* =========================================================
   FEATURES
   ========================================================= */
.features {
  padding: 100px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  padding: 36px 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all 0.3s;
}

.feature-card:hover {
  border-color: rgba(0,75,255,0.12);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.feature-icon { font-size: 32px; margin-bottom: 16px; }

.feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* =========================================================
   SHOWCASE
   ========================================================= */
.showcase {
  padding: 80px 0;
  background: var(--bg-alt);
}

.showcase-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 80px;
}

.showcase-item:last-child { margin-bottom: 0; }

.showcase-text .section-label { margin-bottom: 8px; }

.showcase-text h2 { font-size: 32px; font-weight: 700; margin-bottom: 16px; }

.showcase-text p { font-size: 15px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 20px; }

.showcase-ul { list-style: none; }
.showcase-ul li { padding: 6px 0; font-size: 14px; color: var(--text); font-weight: 500; }

.showcase-img img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}

/* =========================================================
   CASES
   ========================================================= */
.cases {
  padding: 100px 0;
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s;
  display: block;
  color: inherit;
  position: relative;
}

.case-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0,75,255,0.12);
}

.case-img {
  height: 200px;
  overflow: hidden;
}

.case-img img { width: 100%; height: 100%; object-fit: cover; }
.case-img-placeholder { width: 100%; height: 100%; background: linear-gradient(135deg, #f0f4ff 0%, #e0ecff 100%); }

.case-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 4px 12px;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(4px);
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
}

.case-body { padding: 20px; }

.case-body h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.case-body p { font-size: 14px; color: var(--text-secondary); margin-bottom: 12px; }

.case-link { font-size: 14px; font-weight: 600; color: var(--primary); }

/* =========================================================
   PRICING
   ========================================================= */
.pricing {
  padding: 100px 0;
  background: var(--bg-alt);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1000px;
  margin: 0 auto;
}

.pricing-card {
  padding: 40px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  text-align: center;
  position: relative;
  transition: all 0.3s;
}

.pricing-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.pricing-card.featured {
  border-color: var(--primary);
  background: linear-gradient(180deg, rgba(0,75,255,0.03) 0%, var(--bg-card) 100%);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 20px;
  background: var(--primary);
  color: #fff;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.pricing-card h3 { font-size: 18px; margin-bottom: 12px; }

.price { font-size: 40px; font-weight: 800; color: var(--text); margin-bottom: 4px; }
.price span { font-size: 14px; color: var(--text-muted); font-weight: 400; }

.pricing-card > p { color: var(--text-muted); font-size: 14px; margin-bottom: 24px; }

.pricing-card ul { list-style: none; text-align: left; margin-bottom: 28px; }
.pricing-card ul li { padding: 8px 0; font-size: 14px; color: var(--text-secondary); }

/* =========================================================
   BLOG
   ========================================================= */
.blog {
  padding: 100px 0;
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s;
}

.blog-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.blog-thumb {
  height: 200px;
  overflow: hidden;
}

.blog-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}

.blog-card:hover .blog-thumb img { transform: scale(1.05); }

.blog-body { padding: 24px; }

.blog-date { font-size: 13px; color: var(--text-muted); display: block; margin-bottom: 8px; }

.blog-body h3 { font-size: 18px; margin-bottom: 8px; line-height: 1.4; }
.blog-body h3 a { color: var(--text); }
.blog-body h3 a:hover { color: var(--primary); }

.blog-body p { font-size: 14px; color: var(--text-secondary); margin-bottom: 12px; line-height: 1.7; }

.blog-link { font-size: 14px; font-weight: 600; color: var(--primary); }

/* =========================================================
   CTA
   ========================================================= */
.cta-section {
  padding: 100px 0;
  text-align: center;
  background: linear-gradient(135deg, #f0f4ff 0%, #e0ecff 50%, #f0f4ff 100%);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0,75,255,0.06) 0%, transparent 70%);
  border-radius: 50%;
}

.cta-section .container { position: relative; z-index: 2; }

.cta-section h2 { font-size: 40px; font-weight: 700; margin-bottom: 8px; }
.cta-section p { font-size: 18px; color: var(--text-secondary); margin-bottom: 32px; }

.cta-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* =========================================================
   FOOTER
   ========================================================= */
.footer {
  background: #0f172a;
  padding: 80px 0 32px;
  color: rgba(255,255,255,0.7);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}

.footer-logo img { height: 28px; width: auto; filter: brightness(10); }

.footer-desc { font-size: 14px; color: rgba(255,255,255,0.4); max-width: 320px; line-height: 1.7; margin: 16px 0 20px; }

.footer-social { display: flex; gap: 12px; }
.social-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 50%;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  cursor: default;
}

.footer-col h5 { font-size: 13px; color: rgba(255,255,255,0.9); margin-bottom: 16px; text-transform: uppercase; letter-spacing: 1px; }

.footer-col a { display: block; font-size: 14px; color: rgba(255,255,255,0.4); padding: 6px 0; }
.footer-col a:hover { color: rgba(255,255,255,0.8); }

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.06);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: rgba(255,255,255,0.3);
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom a { color: rgba(255,255,255,0.3); }
.footer-bottom a:hover { color: rgba(255,255,255,0.6); }

/* =========================================================
   RESPONSIVE - 手机端自适应
   ========================================================= */

/* Tablet (768px - 1023px) */
@media (max-width: 1023px) {
  .hero .container { grid-template-columns: 1fr; gap: 48px; text-align: center; }
  .hero-desc { margin: 0 auto 32px; }
  .hero-btns { justify-content: center; }
  .hero-title { font-size: 42px; }
  .hero-subtitle { font-size: 36px; }
  .terminal-card { margin: 0 auto; }

  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); max-width: 700px; }
  .blog-grid { grid-template-columns: repeat(2, 1fr); }

  .showcase-item { grid-template-columns: 1fr; gap: 32px; }
  .showcase-item.reverse .showcase-text { order: 0; }

  .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }

  .section-title { font-size: 30px; }
  .slogan-title { font-size: 34px; }
}

/* Mobile (< 768px) */
@media (max-width: 767px) {
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(16px);
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    gap: 16px;
    box-shadow: var(--shadow);
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }

  .hero { padding: 100px 0 60px; }
  .hero-title { font-size: 32px; letter-spacing: -1px; }
  .hero-subtitle { font-size: 28px; }
  .hero-desc { font-size: 16px; }

  .features-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 400px; }
  .blog-grid { grid-template-columns: 1fr; }

  .section-title { font-size: 26px; }
  .section-desc { font-size: 16px; }

  .slogan-title { font-size: 26px; }
  .slogan-desc { font-size: 15px; }

  .showcase-text h2 { font-size: 24px; }

  .footer-grid { grid-template-columns: 1fr; }

  .cta-section h2 { font-size: 28px; }
  .cta-btns { flex-direction: column; align-items: center; }
  .cta-btns .btn { width: 100%; max-width: 280px; justify-content: center; }

  .pricing-card.featured { transform: none; }

  .client-logos { gap: 20px; }
  .client-logo { height: 20px; }
}

/* Small mobile (< 480px) */
@media (max-width: 479px) {
  .hero-title { font-size: 26px; }
  .hero-subtitle { font-size: 22px; }
  .hero-desc { font-size: 14px; }
  .hero-btns { flex-direction: column; }
  .hero-btns .btn { width: 100%; justify-content: center; }

  .section-title { font-size: 22px; }

  .terminal-body { font-size: 11px; padding: 16px; }
}

/* =========================================================
   CHANGELOG (更新日志)
   ========================================================= */
.changelog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1000px;
  margin: 0 auto;
}

.changelog-card {
  padding: 32px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  position: relative;
  transition: all 0.3s;
}

.changelog-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.changelog-card.changelog-current {
  border-color: var(--primary);
  background: linear-gradient(180deg, rgba(0,75,255,0.03) 0%, var(--bg-card) 100%);
}

.changelog-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 20px;
  background: #ff6b6b;
  color: #fff;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.changelog-version {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}

.changelog-date {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.changelog-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.changelog-list li {
  padding: 6px 0;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  border-bottom: 1px dashed var(--border);
}

.changelog-list li:last-child {
  border-bottom: none;
}

.changelog-list li::before {
  content: '✦ ';
  color: var(--primary);
}

/* =========================================================
   ABOUT SECTION
   ========================================================= */
.about-section {
  padding: 100px 0;
  background: var(--bg-alt);
  text-align: center;
}

.about-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
}

.about-card {
  padding: 40px 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  transition: all 0.3s;
}

.about-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.about-card-highlight {
  border-color: var(--primary);
  box-shadow: 0 4px 24px rgba(0,75,255,0.08);
}

.about-card-icon {
  font-size: 40px !important;
  color: var(--primary);
  margin-bottom: 16px;
  display: block;
}

.about-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.about-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* =========================================================
   SCREENSHOTS
   ========================================================= */
.screenshots {
  padding: 100px 0 80px;
  text-align: center;
  overflow: hidden;
}

.screenshot-scroll {
  overflow-x: auto;
  padding: 20px 0 40px;
  cursor: grab;
  -webkit-overflow-scrolling: touch;
}

.screenshot-scroll::-webkit-scrollbar {
  height: 6px;
}

.screenshot-scroll::-webkit-scrollbar-track {
  background: var(--bg-alt);
  border-radius: 10px;
}

.screenshot-scroll::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 10px;
}

.screenshot-track {
  display: flex;
  gap: 20px;
  padding: 0 24px;
  width: max-content;
}

.screenshot-item {
  flex-shrink: 0;
}

.screenshot-mockup {
  width: 240px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
  background: var(--bg-card);
  transition: transform 0.3s;
}

.screenshot-mockup:hover {
  transform: translateY(-4px) scale(1.02);
}

.screenshot-mockup img {
  width: 100%;
  display: block;
}

/* Changelog / About / Screenshots responsive */
@media (max-width: 1023px) {
  .changelog-grid { grid-template-columns: repeat(2, 1fr); }
  .about-cards { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 767px) {
  .changelog-grid { grid-template-columns: 1fr; max-width: 400px; }
  .about-cards { grid-template-columns: 1fr; max-width: 400px; }
}