/* Japanese Wabi-Sabi (日式侘寂留白) Theme */
:root {
  --wabi-bg: #f5f2eb;
  --wabi-surface: #efece4;
  --wabi-card: #e8e4da;
  --wabi-text: #2c2927;
  --wabi-muted: #736d67;
  --wabi-border: #d8d2c7;
  --wabi-accent: #5a6b5c; /* 苔藓静谧绿 */
  --wabi-accent-hover: #48564a;
  --wabi-stone: #8c8275;
  --wabi-dark: #1e1c1b;
  --wabi-dark-text: #ece8df;
  --wabi-dark-muted: #a39c93;
  --wabi-shadow: 0 8px 30px rgba(44, 41, 39, 0.04);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Noto Serif SC", "Source Han Serif SC", "STSong", "Georgia", serif;
  background-color: var(--wabi-bg);
  color: var(--wabi-text);
  line-height: 1.8;
  letter-spacing: 0.5px;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.3s ease;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(245, 242, 235, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--wabi-border);
}

.container {
  max-width: 1140px;
  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: 20px;
  font-weight: 600;
  color: var(--wabi-text);
  letter-spacing: 1px;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--wabi-text);
  color: var(--wabi-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  border-radius: 50%;
}

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

.nav-link {
  font-size: 14px;
  color: var(--wabi-muted);
  font-weight: 500;
}

.nav-link:hover, .nav-link.active {
  color: var(--wabi-text);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 500;
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.3s ease;
  border: 1px solid transparent;
  letter-spacing: 1px;
}

.btn-primary {
  background: var(--wabi-text);
  color: var(--wabi-bg);
  border-color: var(--wabi-text);
}

.btn-primary:hover {
  background: var(--wabi-accent);
  border-color: var(--wabi-accent);
}

.btn-outline {
  background: transparent;
  color: var(--wabi-text);
  border-color: var(--wabi-border);
}

.btn-outline:hover {
  border-color: var(--wabi-text);
  background: rgba(44, 41, 39, 0.03);
}

/* Hero Section */
.hero {
  padding: 100px 0 80px;
  text-align: center;
  position: relative;
  border-bottom: 1px solid var(--wabi-border);
}

.wabi-badge {
  display: inline-block;
  padding: 4px 16px;
  font-size: 12px;
  letter-spacing: 3px;
  color: var(--wabi-stone);
  border: 1px solid var(--wabi-border);
  margin-bottom: 28px;
  background: var(--wabi-surface);
}

.hero-title {
  font-size: 42px;
  font-weight: 600;
  letter-spacing: 1px;
  line-height: 1.3;
  margin-bottom: 20px;
  color: var(--wabi-text);
}

.hero-title span {
  color: var(--wabi-accent);
}

.hero-subtitle {
  font-size: 17px;
  color: var(--wabi-muted);
  max-width: 720px;
  margin: 0 auto 44px;
  font-weight: 400;
}

.hero-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 60px;
}

/* Showcase Grid */
.wabi-showcase {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 40px;
}

.wabi-card {
  background: var(--wabi-surface);
  border: 1px solid var(--wabi-border);
  padding: 16px;
  box-shadow: var(--wabi-shadow);
  transition: transform 0.4s ease, border-color 0.4s ease;
}

.wabi-card:hover {
  transform: translateY(-4px);
  border-color: var(--wabi-stone);
}

.wabi-card img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  display: block;
  filter: sepia(0.08) contrast(0.96);
}

.wabi-card-label {
  margin-top: 16px;
  font-size: 13px;
  color: var(--wabi-stone);
  text-align: center;
  letter-spacing: 1px;
}

/* Sections */
.section {
  padding: 90px 0;
  border-bottom: 1px solid var(--wabi-border);
}

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

.section-title {
  text-align: center;
  margin-bottom: 60px;
}

.section-title h2 {
  font-size: 30px;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.section-title p {
  color: var(--wabi-muted);
  font-size: 15px;
}

/* 3x3 Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

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

.feature-card:hover {
  background: var(--wabi-card);
  border-color: var(--wabi-stone);
}

.feature-icon {
  font-size: 15px;
  color: var(--wabi-accent);
  font-weight: 600;
  margin-bottom: 20px;
  letter-spacing: 2px;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 14px;
}

.feature-card p {
  font-size: 14px;
  color: var(--wabi-muted);
  line-height: 1.7;
}

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

.blog-card {
  background: var(--wabi-surface);
  border: 1px solid var(--wabi-border);
  padding: 36px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.blog-date {
  font-size: 12px;
  color: var(--wabi-accent);
  margin-bottom: 12px;
  letter-spacing: 1.5px;
}

.blog-card h3 {
  font-size: 19px;
  font-weight: 600;
  margin-bottom: 12px;
}

.blog-card p {
  font-size: 14px;
  color: var(--wabi-muted);
  margin-bottom: 24px;
  line-height: 1.7;
}

.blog-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--wabi-text);
  letter-spacing: 1px;
}

.blog-link:hover {
  color: var(--wabi-accent);
}

.more-wrapper {
  text-align: center;
  margin-top: 50px;
}

/* FAQ Section */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.faq-item {
  background: var(--wabi-bg);
  border: 1px solid var(--wabi-border);
  padding: 28px 32px;
}

.faq-question {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--wabi-text);
}

.faq-answer {
  font-size: 14px;
  color: var(--wabi-muted);
  line-height: 1.8;
}

/* Download Page Specific */
.download-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 44px;
}

.download-card {
  background: var(--wabi-surface);
  border: 1px solid var(--wabi-border);
  padding: 40px 28px;
  text-align: center;
}

.download-card-icon {
  font-size: 36px;
  margin-bottom: 18px;
  opacity: 0.85;
}

.download-card h3 {
  font-size: 19px;
  font-weight: 600;
  margin-bottom: 12px;
}

.download-card p {
  font-size: 14px;
  color: var(--wabi-muted);
  margin-bottom: 28px;
}

.download-web-banner {
  background: var(--wabi-text);
  color: var(--wabi-bg);
  padding: 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.download-web-banner h3 {
  font-size: 21px;
  font-weight: 600;
  margin-bottom: 8px;
}

.download-web-banner p {
  color: var(--wabi-dark-muted);
  font-size: 14px;
}

/* Footer */
.footer {
  background: var(--wabi-dark);
  color: var(--wabi-dark-text);
  padding: 80px 0 36px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 44px;
  margin-bottom: 60px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 22px;
  color: var(--wabi-dark-text);
  letter-spacing: 1px;
}

.footer-col p {
  font-size: 14px;
  color: var(--wabi-dark-muted);
  line-height: 1.8;
}

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

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

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

.footer-col ul li a:hover {
  color: var(--wabi-dark-text);
}

.footer-copyright {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 28px;
  text-align: center;
  font-size: 13px;
  color: var(--wabi-dark-muted);
  letter-spacing: 1px;
}

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