/* Surrealist Collage (超现实主义拼贴) Theme - High Performance Optimized */
:root {
  --sur-bg: #f5f2eb;
  --sur-surface: #fdfbf7;
  --sur-card: #eae5d9;
  --sur-sky: #2a5298;
  --sur-cloud: #e0f2fe;
  --sur-gold: #c5a059;
  --sur-rose: #b85b6c;
  --sur-dark: #0f1b29;
  --sur-text: #1a2332;
  --sur-muted: #5c6878;
  --sur-border: #d4ceb8;
  --sur-frame: 2px dashed #2a5298;
  --sur-shadow: 6px 6px 0px rgba(42, 82, 152, 0.2);
}

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

html {
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: Georgia, "Times New Roman", Times, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--sur-bg);
  color: var(--sur-text);
  line-height: 1.7;
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(42, 82, 152, 0.05) 0%, transparent 30%),
    radial-gradient(circle at 90% 80%, rgba(184, 91, 108, 0.05) 0%, transparent 30%);
  background-attachment: fixed;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.2s ease;
}

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

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(253, 251, 247, 0.94);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 2px dashed var(--sur-sky);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
  will-change: transform;
}

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--sur-sky);
  font-family: Georgia, serif;
  font-style: italic;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--sur-sky);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  border-radius: 50% 50% 0 50%;
  transform: rotate(-10deg);
  box-shadow: 2px 2px 0px var(--sur-gold);
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 14px;
  font-weight: 700;
  color: var(--sur-muted);
  letter-spacing: 0.5px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

.nav-link:hover, .nav-link.active {
  color: var(--sur-sky);
  border-bottom: 2px dashed var(--sur-sky);
  padding-bottom: 2px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 1px;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 2px solid var(--sur-sky);
  border-radius: 20px 0 20px 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  text-transform: uppercase;
  will-change: transform;
}

.btn-primary {
  background: var(--sur-sky);
  color: #ffffff;
  box-shadow: var(--sur-shadow);
}

.btn-primary:hover {
  background: var(--sur-rose);
  border-color: var(--sur-rose);
  transform: translate3d(-2px, -2px, 0);
  box-shadow: 8px 8px 0px rgba(184, 91, 108, 0.3);
}

.btn-outline {
  background: var(--sur-surface);
  color: var(--sur-sky);
  box-shadow: 4px 4px 0px var(--sur-border);
}

.btn-outline:hover {
  background: var(--sur-cloud);
  border-color: var(--sur-sky);
  transform: translate3d(-2px, -2px, 0);
  box-shadow: 6px 6px 0px var(--sur-sky);
}

/* Hero Section */
.hero {
  padding: 85px 0 65px;
  text-align: center;
  position: relative;
  border-bottom: 2px dashed var(--sur-border);
}

.sur-badge {
  display: inline-block;
  padding: 4px 18px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--sur-rose);
  background: var(--sur-surface);
  border: 1px solid var(--sur-rose);
  border-radius: 12px;
  box-shadow: 3px 3px 0px rgba(184, 91, 108, 0.2);
  margin-bottom: 22px;
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}

.hero-title {
  font-size: 46px;
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1.25;
  margin-bottom: 20px;
  color: var(--sur-dark);
}

.hero-title span {
  color: var(--sur-sky);
  font-style: italic;
  text-decoration: underline;
  text-decoration-style: wavy;
  text-decoration-color: var(--sur-gold);
}

.hero-subtitle {
  font-size: 18px;
  color: var(--sur-muted);
  max-width: 780px;
  margin: 0 auto 40px;
  line-height: 1.8;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

.hero-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}

/* Surreal Collage Showcase Grid */
.sur-showcase {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.sur-card {
  background: var(--sur-surface);
  border: 2px solid var(--sur-border);
  padding: 14px;
  box-shadow: var(--sur-shadow);
  border-radius: 8px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  will-change: transform;
  position: relative;
}

.sur-card:nth-child(1) { transform: rotate(-1.5deg); }
.sur-card:nth-child(2) { transform: rotate(1deg); }
.sur-card:nth-child(3) { transform: rotate(-0.5deg); }

.sur-card:hover {
  transform: translate3d(0, -6px, 0) rotate(0deg);
  box-shadow: 0 12px 25px rgba(42, 82, 152, 0.15);
  border-color: var(--sur-sky);
}

.sur-card img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  display: block;
  border: 1px solid var(--sur-border);
  border-radius: 4px;
  filter: sepia(15%) contrast(1.05);
  content-visibility: auto;
}

.sur-card-label {
  margin-top: 12px;
  font-size: 13px;
  font-weight: 800;
  color: var(--sur-sky);
  text-align: center;
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
  letter-spacing: 0.5px;
}

/* Sections */
.section {
  padding: 80px 0;
  border-bottom: 2px dashed var(--sur-border);
  content-visibility: auto;
  contain-intrinsic-size: 1px 600px;
}

.section-panel {
  background: var(--sur-surface);
}

.section-title {
  text-align: center;
  margin-bottom: 50px;
}

.section-title h2 {
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
  color: var(--sur-dark);
  font-style: italic;
}

.section-title p {
  color: var(--sur-muted);
  font-size: 16px;
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}

/* 3x3 Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.feature-card {
  background: var(--sur-bg);
  border: 1px solid var(--sur-border);
  border-radius: 12px;
  padding: 32px 24px;
  position: relative;
  transition: all 0.2s ease;
}

.feature-card:hover {
  background: var(--sur-surface);
  border-color: var(--sur-sky);
  box-shadow: var(--sur-shadow);
}

.feature-icon {
  width: 40px;
  height: 40px;
  background: var(--sur-sky);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 14px;
  margin-bottom: 20px;
  border-radius: 50%;
  box-shadow: 2px 2px 0px var(--sur-gold);
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}

.feature-card h3 {
  font-size: 19px;
  font-weight: 800;
  color: var(--sur-dark);
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 14px;
  color: var(--sur-muted);
  line-height: 1.7;
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}

/* Blog Section */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.blog-card {
  background: var(--sur-surface);
  border: 2px solid var(--sur-border);
  border-radius: 10px;
  padding: 34px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--sur-shadow);
}

.blog-date {
  font-size: 12px;
  font-weight: 800;
  color: var(--sur-rose);
  margin-bottom: 12px;
  letter-spacing: 1.5px;
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
  text-transform: uppercase;
}

.blog-card h3 {
  font-size: 21px;
  font-weight: 800;
  color: var(--sur-dark);
  margin-bottom: 14px;
  line-height: 1.35;
}

.blog-card p {
  font-size: 14px;
  color: var(--sur-muted);
  margin-bottom: 22px;
  line-height: 1.7;
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}

.blog-link {
  font-size: 14px;
  font-weight: 800;
  color: var(--sur-sky);
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}

.blog-link:hover {
  color: var(--sur-rose);
  text-decoration: underline;
}

.more-wrapper {
  text-align: center;
  margin-top: 40px;
}

/* FAQ Section */
.faq-container {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.faq-item {
  background: var(--sur-bg);
  border: 1px solid var(--sur-border);
  border-radius: 8px;
  padding: 26px 30px;
}

.faq-question {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 10px;
  color: var(--sur-sky);
}

.faq-answer {
  font-size: 14px;
  color: var(--sur-muted);
  line-height: 1.8;
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}

/* Download Page Specific */
.download-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}

.download-card {
  background: var(--sur-surface);
  border: 2px solid var(--sur-border);
  border-radius: 12px;
  padding: 36px 24px;
  text-align: center;
  box-shadow: var(--sur-shadow);
}

.download-card-icon {
  font-size: 38px;
  margin-bottom: 16px;
}

.download-card h3 {
  font-size: 21px;
  font-weight: 800;
  color: var(--sur-dark);
  margin-bottom: 12px;
}

.download-card p {
  font-size: 14px;
  color: var(--sur-muted);
  margin-bottom: 24px;
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}

.download-web-banner {
  background: var(--sur-card);
  border: 2px dashed var(--sur-sky);
  border-radius: 12px;
  padding: 38px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  box-shadow: var(--sur-shadow);
}

.download-web-banner h3 {
  font-size: 22px;
  color: var(--sur-sky);
  margin-bottom: 8px;
}

.download-web-banner p {
  color: var(--sur-muted);
  font-size: 14px;
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}

/* Footer */
.footer {
  background: var(--sur-dark);
  color: #ffffff;
  padding: 70px 0 30px;
  border-top: 2px dashed var(--sur-gold);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 50px;
}

.footer-col h4 {
  font-size: 16px;
  font-weight: 800;
  margin-bottom: 20px;
  color: var(--sur-gold);
  letter-spacing: 1px;
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}

.footer-col p {
  font-size: 14px;
  color: #a3b1c2;
  line-height: 1.8;
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul li a {
  font-size: 14px;
  color: #a3b1c2;
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}

.footer-col ul li a:hover {
  color: #ffffff;
}

.footer-copyright {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  text-align: center;
  font-size: 13px;
  color: #6e7c8c;
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}

@media (max-width: 992px) {
  .sur-showcase, .features-grid, .download-grid {
    grid-template-columns: 1fr;
  }
  .blog-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .download-web-banner {
    flex-direction: column;
    text-align: center;
  }
}