/* ===== 基础变量 ===== */
:root {
  --color-primary: #0E5C3A;
  --color-primary-dark: #0A4629;
  --color-primary-light: #E8F2EC;
  --color-accent: #D4A574;
  --color-accent-light: #F5EBDC;
  --color-text: #1A2B26;
  --color-text-soft: #5A6B66;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F5F7F4;
  --color-border: #E5EAE6;
  --color-footer: #0E1F1C;
  --radius-card: 12px;
  --radius-btn: 8px;
  --shadow-sm: 0 2px 8px rgba(14, 92, 58, 0.06);
  --shadow-md: 0 8px 30px rgba(14, 92, 58, 0.08);
  --shadow-lg: 0 20px 50px rgba(14, 92, 58, 0.12);
  --max-width: 1200px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

/* ===== 全局重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img, svg { display: block; }

/* ===== 布局容器 ===== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, box-shadow .3s, background .3s;
}
.navbar.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 17px;
  color: var(--color-text);
  letter-spacing: 0.5px;
}
.logo-mark { display: flex; }
.logo-text { line-height: 1; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav-link {
  font-size: 15px;
  color: var(--color-text-soft);
  position: relative;
  padding: 6px 0;
  transition: color .25s;
}
.nav-link:hover { color: var(--color-primary); }
.nav-link::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--color-primary);
  transition: width .3s ease;
}
.nav-link:hover::after { width: 100%; }
.nav-link-cta {
  padding: 8px 20px;
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-btn);
  color: var(--color-primary);
  transition: background .25s, color .25s;
}
.nav-link-cta::after { display: none; }
.nav-link-cta:hover { background: var(--color-primary); color: #fff; }

/* 汉堡菜单 */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.menu-toggle span {
  width: 24px; height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform .3s, opacity .3s;
}
.menu-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Hero 区域 ===== */
.hero {
  position: relative;
  padding: 160px 0 100px;
  background: linear-gradient(180deg, #F0F6F2 0%, #FFFFFF 100%);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.hero-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.5;
}
.hero-blob-1 {
  width: 480px; height: 480px;
  background: radial-gradient(circle, rgba(14,92,58,0.35), transparent 70%);
  top: -120px; right: -80px;
}
.hero-blob-2 {
  width: 380px; height: 380px;
  background: radial-gradient(circle, rgba(212,165,116,0.28), transparent 70%);
  bottom: -100px; left: -60px;
}
.hero-blob-3 {
  width: 280px; height: 280px;
  background: radial-gradient(circle, rgba(14,92,58,0.18), transparent 70%);
  top: 40%; left: 45%;
}
.hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 820px;
}
.hero-eyebrow {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--color-primary);
  font-weight: 600;
  padding: 6px 16px;
  background: var(--color-primary-light);
  border-radius: 999px;
  margin-bottom: 24px;
}
.hero-title {
  font-size: clamp(36px, 6vw, 60px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.5px;
  margin-bottom: 24px;
  color: var(--color-text);
}
.hero-subtitle {
  font-size: clamp(16px, 2.2vw, 19px);
  color: var(--color-text-soft);
  margin-bottom: 40px;
}
.hero-br { display: inline; }
.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  cursor: pointer;
  transition: transform .2s, box-shadow .25s, background .25s, color .25s;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 8px 20px rgba(14,92,58,0.25);
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(14,92,58,0.32);
}
.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}

/* ===== 通用区块 ===== */
.section { padding: 100px 0; }
.section-alt { background: var(--color-bg-alt); }
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 64px;
}
.section-eyebrow {
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: 12px;
  text-transform: uppercase;
}
.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  letter-spacing: -0.3px;
  margin-bottom: 16px;
}
.section-desc {
  font-size: 17px;
  color: var(--color-text-soft);
}

/* ===== 产品卡片 ===== */
.products {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.product-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 40px 36px;
  transition: transform .3s, box-shadow .3s, border-color .3s;
}
.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.product-icon {
  width: 64px; height: 64px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}
.product-icon-bird { background: var(--color-primary-light); }
.product-icon-box { background: var(--color-accent-light); }
.product-tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 1px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: 14px;
}
.product-tag-warm {
  background: var(--color-accent-light);
  color: #A0723E;
}
.product-name {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 14px;
}
.product-desc {
  font-size: 15.5px;
  color: var(--color-text-soft);
  margin-bottom: 24px;
  line-height: 1.7;
}
.product-features {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}
.product-features li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
}
.dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--color-primary);
}
.dot-warm { background: var(--color-accent); }

/* ===== 关于我们 ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
.about-text {
  font-size: 16.5px;
  color: var(--color-text-soft);
  margin: 20px 0 24px;
  line-height: 1.85;
}
.about-slogan {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-primary);
  font-style: italic;
  border-left: 3px solid var(--color-accent);
  padding-left: 16px;
}
.about-features {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.feature-item {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 28px 30px;
  transition: box-shadow .3s, transform .3s;
}
.feature-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
}
.feature-num {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 1px;
  margin-bottom: 8px;
}
.feature-title {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 8px;
}
.feature-desc {
  font-size: 14.5px;
  color: var(--color-text-soft);
  line-height: 1.7;
}

/* ===== 页脚 ===== */
.footer {
  background: var(--color-footer);
  color: rgba(255,255,255,0.7);
  padding: 64px 0 24px;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 32px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}
.footer-name {
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}
.footer-tag {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
}
.footer-contact-label {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  margin-bottom: 8px;
  letter-spacing: 1px;
}
.footer-mail {
  font-size: 18px;
  font-weight: 600;
  color: #fff;
  transition: color .25s;
}
.footer-mail:hover { color: var(--color-accent); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 24px;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
}
.footer-icp { letter-spacing: 0.5px; }

/* ===== 入场动画 ===== */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .8s ease, transform .8s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 响应式：平板 ===== */
@media (max-width: 1023px) {
  .container { padding: 0 24px; }
  .section { padding: 80px 0; }
  .hero { padding: 130px 0 80px; }
  .about-grid { gap: 40px; }
  .product-card { padding: 32px 28px; }
}

/* ===== 响应式：移动端 ===== */
@media (max-width: 767px) {
  .container { padding: 0 20px; }

  /* 移动端导航 */
  .nav-links {
    position: fixed;
    top: 72px; left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    gap: 0;
    padding: 8px 0 20px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform .35s ease, opacity .35s ease, visibility .35s;
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .nav-link {
    width: 100%;
    padding: 14px 20px;
    border-bottom: 1px solid var(--color-border);
  }
  .nav-link::after { display: none; }
  .nav-link-cta {
    margin: 16px 20px 0;
    width: calc(100% - 40px);
    border-color: var(--color-primary);
    text-align: center;
  }
  .menu-toggle { display: flex; }

  /* Hero */
  .hero { padding: 110px 0 70px; }
  .hero-br { display: none; }
  .hero-subtitle br { display: none; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn { width: 100%; }

  /* 产品 */
  .products { grid-template-columns: 1fr; gap: 20px; }
  .product-card { padding: 28px 24px; }
  .section-head { margin-bottom: 44px; }

  /* 关于 */
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .feature-item { padding: 22px 24px; }

  /* 页脚 */
  .footer-inner { flex-direction: column; }
  .footer-bottom { justify-content: flex-start; }
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; transition: none; }
}