/* === 极简日式风格 - 断舍离 === */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500&family=Noto+Serif+SC:wght@400;600;700&display=swap');

:root {
  --bg-primary: #F7F5F0;
  --bg-white: #FFFFFF;
  --text-dark: #3D352E;
  --text-medium: #5C534A;
  --text-light: #8A7E72;
  --accent-green: #4A5D4E;
  --accent-brown: #B8A99A;
  --border: #E8E6E1;
  --shadow: rgba(61, 53, 46, 0.06);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans SC', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-dark);
  line-height: 1.9;
  font-weight: 300;
  letter-spacing: 0.02em;
}

/* === 导航 === */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(247, 245, 240, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1000;
  border-bottom: 1px solid var(--border);
  transition: all 0.4s ease;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
}

.logo {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--text-dark);
  text-decoration: none;
  letter-spacing: 0.1em;
}

.logo span {
  color: var(--accent-green);
}

.nav-links {
  display: flex;
  gap: 48px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-medium);
  font-size: 0.95rem;
  font-weight: 400;
  position: relative;
  padding-bottom: 4px;
  transition: color 0.3s;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent-green);
  transition: width 0.4s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent-green);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}

.mobile-toggle span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--text-dark);
  transition: all 0.3s;
}

/* === 公共布局 === */
main {
  padding-top: 72px;
}

.section {
  padding: 120px 40px;
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  font-family: 'Noto Serif SC', serif;
  font-size: 2.4rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--text-light);
  margin-bottom: 64px;
  letter-spacing: 0.1em;
}

.section-divider {
  width: 48px;
  height: 1px;
  background: var(--accent-brown);
  margin: 0 auto 48px;
}

/* === 首页 Hero === */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 40px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -10%;
  right: -5%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(184, 169, 154, 0.12) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-content {
  max-width: 800px;
  position: relative;
  z-index: 1;
}

.hero-label {
  font-size: 0.85rem;
  color: var(--text-light);
  letter-spacing: 0.2em;
  margin-bottom: 32px;
  text-transform: uppercase;
}

.hero-title {
  font-family: 'Noto Serif SC', serif;
  font-size: 4.5rem;
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1.2;
  margin-bottom: 32px;
  letter-spacing: 0.08em;
}

.hero-title .jp {
  display: block;
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--text-light);
  margin-top: 12px;
  letter-spacing: 0.3em;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-medium);
  max-width: 560px;
  margin: 0 auto 48px;
  line-height: 2;
}

.btn-primary {
  display: inline-block;
  padding: 16px 48px;
  border: 1px solid var(--accent-green);
  color: var(--accent-green);
  text-decoration: none;
  font-size: 0.95rem;
  letter-spacing: 0.15em;
  transition: all 0.4s ease;
  background: transparent;
  cursor: pointer;
}

.btn-primary:hover {
  background: var(--accent-green);
  color: var(--bg-white);
}

.scroll-hint {
  position: absolute;
  bottom: 48px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-light);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  animation: float 2s ease-in-out infinite;
}

.scroll-hint svg {
  width: 24px;
  height: 24px;
  stroke: var(--accent-brown);
}

@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* === 卡片组件 === */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
}

.card {
  background: var(--bg-white);
  padding: 48px 40px;
  border: 1px solid var(--border);
  transition: all 0.4s ease;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--accent-green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.card:hover::before {
  transform: scaleX(1);
}

.card:hover {
  box-shadow: 0 20px 40px var(--shadow);
  transform: translateY(-4px);
}

.card-number {
  font-family: 'Noto Serif SC', serif;
  font-size: 2.5rem;
  color: var(--accent-brown);
  opacity: 0.4;
  margin-bottom: 16px;
  line-height: 1;
}

.card-title {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-dark);
}

.card-text {
  color: var(--text-medium);
  font-size: 0.95rem;
  line-height: 1.9;
}

/* === 引用区块 === */
.quote-block {
  background: var(--bg-white);
  padding: 80px 60px;
  text-align: center;
  border-left: 3px solid var(--accent-green);
  max-width: 800px;
  margin: 0 auto;
}

.quote-text {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.6rem;
  color: var(--text-dark);
  line-height: 2;
  margin-bottom: 24px;
  font-weight: 400;
}

.quote-author {
  font-size: 0.9rem;
  color: var(--text-light);
  letter-spacing: 0.1em;
}

/* === 步骤时间线 === */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding-left: 40px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  padding-bottom: 64px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -40px;
  top: 6px;
  width: 16px;
  height: 16px;
  background: var(--bg-primary);
  border: 2px solid var(--accent-green);
  border-radius: 50%;
}

.timeline-title {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-dark);
}

.timeline-text {
  color: var(--text-medium);
  line-height: 1.9;
}

/* === 页脚 === */
.site-footer {
  background: var(--bg-white);
  border-top: 1px solid var(--border);
  padding: 48px 40px;
  text-align: center;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-brand {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.2rem;
  color: var(--text-dark);
  margin-bottom: 16px;
  letter-spacing: 0.1em;
}

.footer-copy {
  font-size: 0.85rem;
  color: var(--text-light);
}

/* === 滚动动画 === */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* === 响应式 === */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: var(--bg-primary);
    flex-direction: column;
    padding: 32px 40px;
    gap: 24px;
    border-bottom: 1px solid var(--border);
  }

  .nav-links.open {
    display: flex;
  }

  .mobile-toggle {
    display: flex;
  }

  .hero-title {
    font-size: 2.8rem;
  }

  .section {
    padding: 80px 24px;
  }

  .quote-block {
    padding: 48px 32px;
  }

  .quote-text {
    font-size: 1.2rem;
  }

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