/* ===== 粒造社 品牌官网 样式 ===== */

/* --- 设计令牌 (Design Tokens) --- */
:root {
  /* 品牌色 - 陶土色系 */
  --color-primary: #97422e;
  --color-primary-light: #b8553e;
  --color-primary-dark: #7a3524;
  --color-primary-bg: #fef5f2;
  --color-primary-surface: #fff8f6;

  /* 辅助色 */
  --color-accent: #c4863a;
  --color-accent-light: #f0c87a;

  /* 中性色 */
  --color-white: #ffffff;
  --color-gray-50: #fafaf9;
  --color-gray-100: #f5f0ee;
  --color-gray-200: #e7e0dc;
  --color-gray-400: #a39690;
  --color-gray-600: #6b5f5a;
  --color-gray-800: #3d322e;
  --color-gray-900: #1e1917;

  /* 森绿色点缀 */
  --color-green: #5b8c5a;
  --color-green-light: #e8f4e8;

  /* 排版 */
  --font-family: 'Noto Sans SC', system-ui, -apple-system, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.75rem;
  --font-size-5xl: 3.5rem;

  /* 间距 */
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* 圆角 */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* 阴影 */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06), 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.08), 0 4px 8px rgba(0, 0, 0, 0.04);
  --shadow-card: 0 2px 8px rgba(151, 66, 46, 0.08), 0 1px 3px rgba(0, 0, 0, 0.04);

  /* 过渡 */
  --ease-out: cubic-bezier(0.33, 1, 0.68, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;

  /* 布局 */
  --max-width: 1120px;
}

/* --- 全局重置 --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.7;
  color: var(--color-gray-800);
  background-color: var(--color-primary-surface);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

/* --- 容器 --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

/* --- 导航栏 --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 248, 246, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: box-shadow var(--duration-normal) var(--ease-out);
}

.nav.nav-scrolled {
  box-shadow: var(--shadow-md);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.05em;
  transition: opacity var(--duration-fast) var(--ease-out);
}

.nav-logo:hover {
  opacity: 0.8;
}

.nav-links {
  display: flex;
  gap: var(--space-xl);
  list-style: none;
}

.nav-links a {
  font-size: var(--font-size-sm);
  font-weight: 400;
  color: var(--color-gray-600);
  transition: color var(--duration-fast) var(--ease-out);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
  transform: scaleX(0);
  transition: transform var(--duration-normal) var(--ease-out);
}

.nav-links a:hover {
  color: var(--color-primary);
}

.nav-links a:hover::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
  transition: all var(--duration-normal) var(--ease-out);
}

/* --- 主视觉 --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 120px var(--space-xl) var(--space-3xl);
  max-width: var(--max-width);
  margin: 0 auto;
  gap: var(--space-3xl);
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(151, 66, 46, 0.04) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-content {
  flex: 1;
  position: relative;
  z-index: 1;
}

.hero-tag {
  display: inline-block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-accent);
  background: rgba(196, 134, 58, 0.1);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-lg);
  letter-spacing: 0.05em;
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.15;
  margin-bottom: var(--space-lg);
  letter-spacing: 0.08em;
}

.hero-title::after {
  content: '· DIY';
  font-size: 0.45em;
  font-weight: 400;
  color: var(--color-gray-400);
  display: block;
  letter-spacing: 0.1em;
}

.hero-desc {
  font-size: var(--font-size-lg);
  color: var(--color-gray-600);
  line-height: 1.9;
  margin-bottom: var(--space-2xl);
  max-width: 420px;
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
}

.hero-visual {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

/* 拼豆装饰画 */
.bead-art {
  display: grid;
  grid-template-columns: repeat(3, 60px);
  grid-template-rows: repeat(3, 60px);
  gap: 8px;
  transform: rotate(3deg);
}

.bead {
  border-radius: 50%;
  box-shadow: inset -3px -3px 6px rgba(0, 0, 0, 0.12), inset 3px 3px 6px rgba(255, 255, 255, 0.4);
  transition: transform var(--duration-normal) var(--ease-out);
  animation: beadFloat 4s ease-in-out infinite;
}

.bead:hover {
  transform: scale(1.15);
}

.bead-1 { background: #97422e; animation-delay: 0s; }
.bead-2 { background: #c4863a; animation-delay: 0.15s; }
.bead-3 { background: #e8a87c; animation-delay: 0.3s; }
.bead-4 { background: #5b8c5a; animation-delay: 0.45s; }
.bead-5 { background: #d4a574; animation-delay: 0.6s; }
.bead-6 { background: #b8553e; animation-delay: 0.75s; }
.bead-7 { background: #f0c87a; animation-delay: 0.9s; }
.bead-8 { background: #8b6914; animation-delay: 1.05s; }
.bead-9 { background: #97422e; animation-delay: 1.2s; }

@keyframes beadFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

/* --- 按钮 --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 2px 8px rgba(151, 66, 46, 0.3);
}

.btn-primary:hover {
  background: var(--color-primary-light);
  box-shadow: 0 4px 16px rgba(151, 66, 46, 0.35);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary-bg);
  transform: translateY(-1px);
}

/* --- 通用区块 --- */
.section {
  padding: var(--space-4xl) 0;
}

.section-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-gray-900);
  text-align: center;
  margin-bottom: var(--space-sm);
  letter-spacing: 0.04em;
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-gray-400);
  text-align: center;
  margin-bottom: var(--space-3xl);
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

/* --- 关于我们 --- */
.about {
  background: var(--color-white);
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}

.about-card {
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
  background: var(--color-primary-surface);
  border-radius: var(--radius-lg);
  transition: transform var(--duration-normal) var(--ease-out), box-shadow var(--duration-normal) var(--ease-out);
}

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

.about-icon {
  font-size: 2.75rem;
  margin-bottom: var(--space-md);
  line-height: 1;
}

.about-card h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-gray-800);
  margin-bottom: var(--space-sm);
}

.about-card p {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  line-height: 1.7;
}

/* --- 服务介绍 --- */
.services {
  background: var(--color-primary-surface);
}

.services-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  max-width: 720px;
  margin: 0 auto;
}

.service-item {
  display: flex;
  gap: var(--space-xl);
  align-items: flex-start;
  padding: var(--space-xl);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  transition: transform var(--duration-normal) var(--ease-out), box-shadow var(--duration-normal) var(--ease-out);
}

.service-item:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
}

.service-num {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-primary);
  opacity: 0.3;
  line-height: 1;
  flex-shrink: 0;
  width: 48px;
}

.service-text h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-gray-800);
  margin-bottom: var(--space-xs);
}

.service-text p {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  line-height: 1.7;
}

/* --- 联系我们 --- */
.contact {
  background: var(--color-white);
}

.contact-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  max-width: 840px;
  margin: 0 auto;
}

.contact-card {
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
  background: var(--color-primary-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-gray-200);
}

.contact-card h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-gray-800);
  margin-bottom: var(--space-sm);
}

.contact-card p {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
}

/* --- 页脚 --- */
.footer {
  background: var(--color-gray-900);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-2xl) 0;
}

.footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.footer-logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.05em;
}

.footer-slogan {
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.45);
}

.footer-info {
  text-align: right;
  font-size: var(--font-size-xs);
  line-height: 2;
}

.footer-info p {
  margin: 0;
}

.footer-icp {
  margin-top: 4px;
}

.footer-icp a {
  display: inline-block;
  color: rgba(255, 255, 255, 0.55);
  padding: 2px 10px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out);
}

.footer-icp a:hover {
  color: rgba(255, 255, 255, 0.85);
  border-color: rgba(255, 255, 255, 0.4);
  background: rgba(255, 255, 255, 0.06);
}

.footer-copy {
  margin-top: 4px;
  color: rgba(255, 255, 255, 0.3);
}

/* --- 响应式 --- */
@media (max-width: 960px) {
  .hero {
    flex-direction: column;
    text-align: center;
    padding-top: 100px;
    min-height: auto;
    gap: var(--space-2xl);
  }

  .hero-desc {
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-visual {
    display: none;
  }

  .about-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-cards {
    grid-template-columns: 1fr;
    max-width: 400px;
  }

  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-open .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(255, 248, 246, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: var(--space-lg) var(--space-xl);
    box-shadow: var(--shadow-lg);
    gap: var(--space-md);
  }

  .nav-open .nav-links a {
    font-size: var(--font-size-base);
    padding: var(--space-sm) 0;
  }

  .footer .container {
    flex-direction: column;
    text-align: center;
  }

  .footer-info {
    text-align: center;
  }

  .section {
    padding: var(--space-3xl) 0;
  }

  .hero-title {
    font-size: var(--font-size-4xl);
  }
}

@media (max-width: 640px) {
  :root {
    --font-size-3xl: 1.75rem;
    --font-size-5xl: 2.5rem;
  }

  .container {
    padding: 0 var(--space-md);
  }

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

  .service-item {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .hero {
    padding: 100px var(--space-md) var(--space-2xl);
  }

  .hero-actions {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .btn {
    width: 100%;
  }
}