/* Memphis Geometric Pattern (孟菲斯波点几何) Theme */
:root {
  --memphis-bg: #fffbf0;
  --memphis-surface: #ffffff;
  --memphis-card: #f8f1e5;
  --memphis-pink: #ff6b81;
  --memphis-teal: #00d2d3;
  --memphis-yellow: #feca57;
  --memphis-purple: #5f27cd;
  --memphis-text: #222222;
  --memphis-muted: #555555;
  --memphis-border: #222222;
  --memphis-dark: #1e1e24;
  --memphis-dark-text: #ffffff;
  --memphis-dark-muted: #aaaaaa;
  --memphis-shadow: 4px 4px 0px #222222;
  --memphis-shadow-lg: 8px 8px 0px #222222;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--memphis-bg);
  color: var(--memphis-text);
  line-height: 1.6;
  background-image: 
    radial-gradient(var(--memphis-pink) 15%, transparent 16%),
    radial-gradient(var(--memphis-teal) 15%, transparent 16%);
  background-size: 60px 60px;
  background-position: 0 0, 30px 30px;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #ffffff;
  border-bottom: 3px solid var(--memphis-border);
}

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 22px;
  font-weight: 900;
  color: var(--memphis-text);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--memphis-yellow);
  border: 3px solid var(--memphis-border);
  box-shadow: 3px 3px 0px var(--memphis-border);
  color: var(--memphis-text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

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

.nav-link {
  font-size: 15px;
  font-weight: 700;
  color: var(--memphis-text);
}

.nav-link:hover, .nav-link.active {
  color: var(--memphis-purple);
  text-decoration: underline;
  text-decoration-thickness: 3px;
  text-underline-offset: 6px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 3px solid var(--memphis-border);
  box-shadow: var(--memphis-shadow);
  text-transform: uppercase;
}

.btn-primary {
  background: var(--memphis-pink);
  color: #ffffff;
}

.btn-primary:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0px var(--memphis-border);
}

.btn-outline {
  background: var(--memphis-teal);
  color: #ffffff;
}

.btn-outline:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0px var(--memphis-border);
}

/* Hero Section */
.hero {
  padding: 80px 0 60px;
  text-align: center;
  position: relative;
  background: var(--memphis-surface);
  border-bottom: 3px solid var(--memphis-border);
}

.memphis-badge {
  display: inline-block;
  padding: 6px 18px;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 2px;
  text-transform: uppercase;
  background: var(--memphis-yellow);
  border: 3px solid var(--memphis-border);
  box-shadow: var(--memphis-shadow);
  margin-bottom: 24px;
}

.hero-title {
  font-size: 44px;
  font-weight: 900;
  letter-spacing: -1px;
  line-height: 1.25;
  margin-bottom: 18px;
}

.hero-title span {
  color: var(--memphis-purple);
  background: var(--memphis-yellow);
  padding: 0 8px;
  border: 3px solid var(--memphis-border);
}

.hero-subtitle {
  font-size: 18px;
  color: var(--memphis-muted);
  max-width: 760px;
  margin: 0 auto 36px;
  font-weight: 600;
}

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

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

.memphis-card {
  background: #ffffff;
  border: 3px solid var(--memphis-border);
  padding: 12px;
  box-shadow: var(--memphis-shadow-lg);
  transition: transform 0.2s ease;
}

.memphis-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: 11px 11px 0px var(--memphis-border);
}

.memphis-card img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  display: block;
  border: 2px solid var(--memphis-border);
}

.memphis-card-label {
  margin-top: 12px;
  font-size: 13px;
  font-weight: 800;
  text-align: center;
}

/* Sections */
.section {
  padding: 80px 0;
  border-bottom: 3px solid var(--memphis-border);
}

.section-panel {
  background: var(--memphis-card);
}

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

.section-title h2 {
  font-size: 32px;
  font-weight: 900;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
}

.section-title p {
  color: var(--memphis-muted);
  font-size: 16px;
  font-weight: 600;
}

/* 3x3 Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: #ffffff;
  border: 3px solid var(--memphis-border);
  padding: 32px 24px;
  box-shadow: var(--memphis-shadow);
  transition: all 0.2s ease;
}

.feature-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0px var(--memphis-border);
}

.feature-icon {
  width: 40px;
  height: 40px;
  background: var(--memphis-teal);
  color: #ffffff;
  border: 2px solid var(--memphis-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 14px;
  margin-bottom: 20px;
  box-shadow: 2px 2px 0px var(--memphis-border);
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 14px;
  color: var(--memphis-muted);
  line-height: 1.6;
}

/* Blog Section */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.blog-card {
  background: #ffffff;
  border: 3px solid var(--memphis-border);
  padding: 32px;
  box-shadow: var(--memphis-shadow);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.blog-date {
  font-size: 12px;
  font-weight: 900;
  color: var(--memphis-purple);
  margin-bottom: 12px;
  letter-spacing: 1px;
}

.blog-card h3 {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 12px;
}

.blog-card p {
  font-size: 14px;
  color: var(--memphis-muted);
  margin-bottom: 20px;
}

.blog-link {
  font-size: 14px;
  font-weight: 800;
  color: var(--memphis-pink);
}

.blog-link:hover {
  text-decoration: underline;
}

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

/* FAQ Section */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: #ffffff;
  border: 3px solid var(--memphis-border);
  padding: 24px 30px;
  box-shadow: var(--memphis-shadow);
}

.faq-question {
  font-size: 17px;
  font-weight: 800;
  margin-bottom: 8px;
}

.faq-answer {
  font-size: 14px;
  color: var(--memphis-muted);
  line-height: 1.7;
}

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

.download-card {
  background: #ffffff;
  border: 3px solid var(--memphis-border);
  padding: 36px 24px;
  text-align: center;
  box-shadow: var(--memphis-shadow);
}

.download-card-icon {
  font-size: 36px;
  margin-bottom: 16px;
}

.download-card h3 {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 12px;
}

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

.download-web-banner {
  background: var(--memphis-yellow);
  color: var(--memphis-text);
  border: 3px solid var(--memphis-border);
  padding: 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  box-shadow: var(--memphis-shadow-lg);
}

.download-web-banner h3 {
  font-size: 22px;
  font-weight: 900;
  margin-bottom: 8px;
}

.download-web-banner p {
  color: var(--memphis-muted);
  font-size: 14px;
  font-weight: 600;
}

/* Footer */
.footer {
  background: var(--memphis-dark);
  color: var(--memphis-dark-text);
  padding: 70px 0 30px;
  border-top: 3px solid var(--memphis-border);
}

.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(--memphis-yellow);
}

.footer-col p {
  font-size: 14px;
  color: var(--memphis-dark-muted);
  line-height: 1.7;
}

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

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

.footer-col ul li a {
  font-size: 14px;
  color: var(--memphis-dark-muted);
}

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

.footer-copyright {
  border-top: 2px solid #333333;
  padding-top: 24px;
  text-align: center;
  font-size: 13px;
  color: var(--memphis-dark-muted);
  font-weight: 600;
}

@media (max-width: 992px) {
  .memphis-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;
  }
}