/* =========================================
   雨林芳 YuLinFang - 全局样式系统
   品牌色彩：深林绿 + 金琥珀 + 象牙白
   ========================================= */

:root {
  /* 主色系 */
  --forest-deep: #1a3a2a;
  --forest-mid: #2d5a3d;
  --forest-light: #4a8c62;
  --forest-pale: #7ab893;
  --forest-mist: #c8e6d0;
  --forest-dew: #e8f5ec;
  
  /* 金琥珀色系 */
  --amber-deep: #8b5e1a;
  --amber-mid: #c4853a;
  --amber-light: #e8a84c;
  --amber-pale: #f5d08a;
  --amber-cream: #fdf3e0;
  
  /* 中性色系 */
  --ivory: #faf8f2;
  --warm-white: #f7f5ef;
  --cream: #efe9db;
  --sand: #d4c9b4;
  --stone: #8a7f72;
  --charcoal: #2c2820;
  --ink: #1a1714;
  
  /* 功能色 */
  --success: #4a8c62;
  --trust-blue: #2a5f8a;
  
  /* 字体 */
  --font-cn: 'Noto Serif SC', 'Source Han Serif SC', '思源宋体', Georgia, serif;
  --font-en: 'Playfair Display', 'Georgia', serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  
  /* 间距 */
  --section-pad: 100px;
  --section-pad-sm: 60px;
  
  /* 过渡 */
  --trans-base: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --trans-slow: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* 阴影 */
  --shadow-sm: 0 2px 12px rgba(26,58,42,0.08);
  --shadow-md: 0 8px 32px rgba(26,58,42,0.12);
  --shadow-lg: 0 20px 60px rgba(26,58,42,0.15);
  --shadow-amber: 0 8px 32px rgba(196,133,58,0.2);
}

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  background: var(--ivory);
  color: var(--charcoal);
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: var(--trans-base); }
ul { list-style: none; }

/* ---- 滚动条美化 ---- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--forest-dew); }
::-webkit-scrollbar-thumb { background: var(--forest-light); border-radius: 3px; }

/* =========================================
   NAVBAR 导航栏
   ========================================= */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0 60px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: var(--trans-base);
}
.navbar.transparent {
  background: transparent;
}
.navbar.scrolled {
  background: rgba(250,248,242,0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  height: 68px;
  box-shadow: var(--shadow-sm);
}
.navbar.dark-mode {
  background: rgba(26,58,42,0.95);
  backdrop-filter: blur(20px);
}

.nav-logo {
  display: flex;
  align-items: center;
  cursor: pointer;
}
.nav-logo-img {
  height: 40px;
  width: auto;
  transition: var(--trans-base);
}

/* Logo颜色变化 */
.navbar.dark-mode .nav-logo-img {
  filter: brightness(0) invert(1);
}
.navbar.scrolled .nav-logo-img {
  filter: none;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-item {
  position: relative;
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 500;
  color: var(--forest-deep);
  border-radius: 24px;
  cursor: pointer;
  transition: var(--trans-base);
  white-space: nowrap;
}
.nav-item:hover {
  background: var(--forest-dew);
  color: var(--forest-light);
}
.nav-item.active {
  color: var(--forest-light);
}
.navbar.dark-mode .nav-item { color: rgba(255,255,255,0.85); }
.navbar.dark-mode .nav-item:hover { background: rgba(255,255,255,0.1); color: white; }

.nav-cta {
  padding: 10px 24px;
  background: linear-gradient(135deg, var(--amber-mid), var(--amber-light));
  color: white !important;
  border-radius: 24px;
  font-weight: 600;
  font-size: 14px;
  box-shadow: var(--shadow-amber);
  transition: var(--trans-base);
}
.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(196,133,58,0.35);
  background: linear-gradient(135deg, var(--amber-deep), var(--amber-mid)) !important;
}

/* 下拉菜单 */
.nav-dropdown {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  background: white;
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  padding: 12px;
  min-width: 160px;
  opacity: 0;
  visibility: hidden;
  transition: var(--trans-base);
  border: 1px solid rgba(26,58,42,0.06);
}
.nav-item:hover .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.nav-dropdown a {
  display: block;
  padding: 10px 16px;
  font-size: 13px;
  color: var(--charcoal);
  border-radius: 8px;
  transition: var(--trans-base);
}
.nav-dropdown a:hover {
  background: var(--forest-dew);
  color: var(--forest-light);
  padding-left: 20px;
}

/* 移动端汉堡 */
.nav-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}
.nav-burger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--forest-deep);
  border-radius: 2px;
  transition: var(--trans-base);
}
.navbar.dark-mode .nav-burger span { background: white; }

/* =========================================
   HERO - 首页英雄区
   ========================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--forest-deep);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(ellipse 80% 80% at 60% 50%, rgba(74,140,98,0.15) 0%, transparent 60%),
    radial-gradient(ellipse 40% 60% at 80% 80%, rgba(196,133,58,0.08) 0%, transparent 50%),
    linear-gradient(160deg, #0f2419 0%, #1a3a2a 40%, #1f4530 70%, #152e1f 100%);
}
.hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1400px;
  margin: 0 auto;
  padding: 120px 60px 80px;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(196,133,58,0.15);
  border: 1px solid rgba(196,133,58,0.3);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 12px;
  color: var(--amber-light);
  letter-spacing: 0.1em;
  margin-bottom: 28px;
  backdrop-filter: blur(10px);
}
.hero-badge-dot {
  width: 6px; height: 6px;
  background: var(--amber-light);
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}
.hero-title {
  font-family: var(--font-cn);
  font-size: clamp(42px, 5vw, 68px);
  font-weight: 700;
  color: white;
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}
.hero-title .highlight {
  background: linear-gradient(135deg, var(--amber-light), var(--amber-pale));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  font-family: var(--font-en);
  font-size: 16px;
  color: rgba(255,255,255,0.4);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: 28px;
}
.hero-desc {
  font-size: 16px;
  color: rgba(255,255,255,0.72);
  line-height: 1.9;
  margin-bottom: 48px;
  max-width: 480px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 36px;
  background: linear-gradient(135deg, var(--amber-mid), var(--amber-light));
  color: white;
  font-weight: 600;
  font-size: 15px;
  border-radius: 50px;
  box-shadow: var(--shadow-amber);
  transition: var(--trans-base);
  cursor: pointer;
  border: none;
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 48px rgba(196,133,58,0.4);
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 36px;
  background: transparent;
  color: white;
  font-weight: 500;
  font-size: 15px;
  border-radius: 50px;
  border: 1.5px solid rgba(255,255,255,0.3);
  transition: var(--trans-base);
  cursor: pointer;
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.6);
  transform: translateY(-2px);
}
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.hero-stat-item { text-align: left; }
.hero-stat-num {
  font-family: var(--font-en);
  font-size: 32px;
  font-weight: 700;
  color: white;
  line-height: 1;
  margin-bottom: 6px;
}
.hero-stat-num span {
  font-size: 18px;
  color: var(--amber-light);
}
.hero-stat-label {
  font-size: 12px;
  color: rgba(255,255,255,0.45);
  letter-spacing: 0.05em;
}

/* 右侧视觉区 */
.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 600px;
}

/* Hero Carousel */
.hero-carousel {
  position: relative;
  width: 100%;
  height: 500px;
  overflow: hidden;
  border-radius: 24px;
  box-shadow: 0 20px 60px rgba(26,58,42,0.15);
}

.carousel-track {
  display: flex;
  height: 100%;
  transition: transform 0.5s ease-in-out;
}

.carousel-slide {
  min-width: 100%;
  height: 100%;
  overflow: hidden;
}

.carousel-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.carousel-indicators {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  z-index: 10;
}

.carousel-indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255,255,255,0.5);
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
}

.carousel-indicator:hover {
  background: rgba(255,255,255,0.8);
}

.carousel-indicator.active {
  background: white;
  width: 32px;
  border-radius: 6px;
}

/* 滚动指示 */
.scroll-hint {
  position: absolute;
  bottom: 40px; left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  z-index: 10;
}
.scroll-hint-text { font-size: 11px; color: rgba(255,255,255,0.35); letter-spacing: 0.15em; }
.scroll-arrow {
  width: 28px; height: 44px;
  border: 1.5px solid rgba(255,255,255,0.2);
  border-radius: 14px;
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 8px;
}
.scroll-arrow::after {
  content: '';
  width: 4px; height: 10px;
  background: rgba(255,255,255,0.5);
  border-radius: 2px;
  animation: scroll-down 2s ease-in-out infinite;
}
@keyframes scroll-down {
  0% { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(14px); opacity: 0; }
}

/* =========================================
   通用 Section 样式
   ========================================= */
.section {
  padding: var(--section-pad) 0;
  position: relative;
  overflow: hidden;
}
.section-sm { padding: var(--section-pad-sm) 0; }
.container {
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 60px;
}
.container-wide {
  max-width: 1500px;
  margin: 0 auto;
  padding: 0 60px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--forest-light);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.section-tag::before {
  content: '';
  width: 20px; height: 2px;
  background: linear-gradient(90deg, var(--forest-light), transparent);
}
.section-title {
  font-family: var(--font-cn);
  font-size: clamp(28px, 3.5vw, 44px);
  font-weight: 700;
  color: var(--forest-deep);
  line-height: 1.3;
  margin-bottom: 16px;
}
.section-title .accent {
  color: var(--forest-light);
}
.section-subtitle {
  font-size: 16px;
  color: var(--stone);
  line-height: 1.8;
  max-width: 600px;
}
.section-header { margin-bottom: 60px; }
.section-header.center { text-align: center; }
.section-header.center .section-tag { justify-content: center; }
.section-header.center .section-subtitle { margin: 0 auto; }

/* =========================================
   TRUST BAND - 信任条带
   ========================================= */
.trust-band {
  background: var(--forest-deep);
  padding: 20px 0;
  overflow: hidden;
}
.trust-band-inner {
  display: flex;
  align-items: center;
  justify-content: space-around;
  gap: 0;
  /*animation: scroll-marquee 20s linear infinite;*/
  white-space: nowrap;
}
.trust-item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 0 40px;
  font-size: 13px;
  color: rgba(255,255,255,0.65);
  flex-shrink: 0;
}
.trust-item-icon { font-size: 16px; }
.trust-sep { color: rgba(196,133,58,0.4); margin: 0; }
@keyframes scroll-marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* =========================================
   FEATURE CARDS - 核心优势
   ========================================= */
.features-section {
  background: var(--warm-white);
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-card {
  background: white;
  border-radius: 20px;
  padding: 36px 28px;
  position: relative;
  overflow: hidden;
  transition: var(--trans-base);
  border: 1px solid rgba(26,58,42,0.06);
  cursor: default;
}
.feature-card::before {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--forest-light), var(--amber-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--trans-slow);
}
.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.feature-card:hover::before { transform: scaleX(1); }
.feature-card-title {
  font-family: var(--font-cn);
  font-size: 24px;
  font-weight: 600;
  color: var(--forest-deep);
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}
.feature-card-desc {
  font-size: 14px;
  color: var(--stone);
  line-height: 1.8;
}
.feature-card-num {
  position: absolute;
  top: 20px; right: 24px;
  font-family: var(--font-en);
  font-size: 48px;
  font-weight: 700;
  color: rgba(26,58,42,0.04);
  line-height: 1;
}

/* =========================================
   BRAND STORY - 品牌故事
   ========================================= */
.brand-story-section {
  background: var(--ivory);
}
.brand-story-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.story-visual {
  width: 100%;
  aspect-ratio: 4/5;
  background-image: url('../images/让大自然保护大自然配图.jpg');
  background-size: cover;
  background-position: center;
  border-radius: 32px;
  position: relative;
  overflow: hidden;
}
.story-img-overlay {
  text-align: center;
  z-index: 2;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.story-origin-text {
  font-family: var(--font-cn-title);
  font-size: 36px;
  font-weight: 700;
  color: var(--ivory);
  margin-bottom: 8px;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
}
.story-origin-subtitle {
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 3px;
  color: var(--amber-light);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}
.story-content { }
.story-quote {
  font-family: var(--font-cn);
  font-size: 24px;
  font-weight: 600;
  color: var(--forest-deep);
  line-height: 1.6;
  margin-bottom: 32px;
  padding-left: 24px;
  border-left: 3px solid var(--amber-light);
}
.story-text {
  font-size: 15px;
  color: var(--stone);
  line-height: 2;
  margin-bottom: 20px;
}
.story-milestones {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 40px;
}
.milestone-item {
  background: var(--forest-dew);
  border-radius: 12px;
  padding: 16px 20px;
  border-left: 3px solid var(--forest-light);
}
.milestone-year {
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 600;
  color: var(--forest-light);
  margin-bottom: 4px;
}
.milestone-text { font-size: 13px; color: var(--charcoal); line-height: 1.5; }

/* =========================================
   PRODUCT PREVIEW - 产品展示
   ========================================= */
.products-section {
  background: var(--forest-deep);
  position: relative;
}
.products-section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(196,133,58,0.3), transparent);
}
.products-section .section-title { color: white; }
.products-section .section-tag { color: var(--amber-light); }
.products-section .section-subtitle { color: rgba(255,255,255,0.55); }
.products-section .section-tag::before { background: linear-gradient(90deg, var(--amber-light), transparent); }

.products-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}
.product-tab {
  padding: 10px 24px;
  border-radius: 24px;
  font-size: 14px;
  font-weight: 500;
  color: rgba(255,255,255,0.55);
  border: 1px solid rgba(255,255,255,0.12);
  cursor: pointer;
  transition: var(--trans-base);
}
.product-tab.active, .product-tab:hover {
  background: linear-gradient(135deg, var(--amber-mid), var(--amber-light));
  color: white;
  border-color: transparent;
  box-shadow: var(--shadow-amber);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.product-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 24px;
  overflow: hidden;
  transition: var(--trans-base);
  cursor: pointer;
}
.product-card:hover {
  background: rgba(255,255,255,0.07);
  border-color: rgba(196,133,58,0.3);
  transform: translateY(-8px);
  box-shadow: 0 24px 60px rgba(0,0,0,0.3);
}
.product-card-img {
  aspect-ratio: 1;
  background: linear-gradient(135deg, rgba(74,140,98,0.2) 0%, rgba(26,58,42,0.6) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 80px;
  position: relative;
  overflow: hidden;
}
.product-card-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, transparent 40%, rgba(26,58,42,0.6) 100%);
}
.product-card-img[style*="background-image"] {
  min-height: 220px;
}
.product-card-badge {
  position: absolute;
  top: 16px; left: 16px;
  background: var(--amber-mid);
  color: white;
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 8px;
  z-index: 1;
}
.product-card-body {
  padding: 24px;
}
.product-card-name {
  font-family: var(--font-cn);
  font-size: 18px;
  font-weight: 600;
  color: white;
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}
.product-card-desc {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  line-height: 1.7;
  margin-bottom: 16px;
}
.product-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 20px;
}
.product-tag {
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 8px;
  background: rgba(74,140,98,0.15);
  color: var(--forest-pale);
  border: 1px solid rgba(74,140,98,0.2);
}
.product-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.product-card-price {
  font-family: var(--font-en);
  font-size: 20px;
  font-weight: 700;
  color: var(--amber-light);
}
.product-card-price span { font-size: 13px; font-weight: 400; }
.product-card-btn {
  padding: 8px 20px;
  background: rgba(196,133,58,0.15);
  color: var(--amber-light);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  border: 1px solid rgba(196,133,58,0.25);
  transition: var(--trans-base);
}
.product-card:hover .product-card-btn {
  background: var(--amber-mid);
  color: white;
  border-color: transparent;
}

/* =========================================
   RESEARCH - 科研背书
   ========================================= */
.research-section {
  background: var(--warm-white);
}
.research-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 80px;
  align-items: start;
}
.research-left {}
.research-intro {
  font-size: 15px;
  color: var(--stone);
  line-height: 2;
  margin-bottom: 40px;
}
.research-institutions {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.institution-item {
  display: flex;
  align-items: flex-start;
  flex-direction: column;
  gap: 5px;
  padding: 16px 20px;
  background: white;
  border-radius: 12px;
  border: 1px solid rgba(26,58,42,0.06);
  transition: var(--trans-base);
}
.institution-item:hover {
  border-color: var(--forest-mist);
  transform: translateX(8px);
}
.institution-icon {
  width: 44px; height: 44px;
  background: var(--forest-dew);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}
.institution-name { font-size: 15px; font-weight: 600; color: var(--forest-deep); margin-bottom: 2px; }
.institution-desc { font-size: 12px; color: var(--stone); }

.research-right {}
.research-data-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}
.data-card {
  background: white;
  border-radius: 20px;
  padding: 28px 24px;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(26,58,42,0.06);
  transition: var(--trans-base);
}
.data-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.data-card-bg {
  position: absolute;
  bottom: -20px; right: -20px;
  font-size: 80px;
  opacity: 0.04;
  line-height: 1;
}
.data-card-num {
  font-family: var(--font-en);
  font-size: 40px;
  font-weight: 700;
  color: var(--forest-deep);
  line-height: 1;
  margin-bottom: 8px;
}
.data-card-num .unit { font-size: 20px; color: var(--forest-light); }
.data-card-label { font-size: 14px; color: var(--stone); line-height: 1.5; }
.data-card.accent { background: linear-gradient(135deg, var(--forest-deep), var(--forest-mid)); }
.data-card.accent .data-card-num { color: white; }
.data-card.accent .data-card-num .unit { color: var(--amber-light); }
.data-card.accent .data-card-label { color: rgba(255,255,255,0.6); }

.research-highlight {
  background: linear-gradient(135deg, var(--amber-cream), white);
  border-radius: 20px;
  padding: 28px 24px;
  border: 1px solid rgba(196,133,58,0.15);
}
.research-highlight-title {
  font-family: var(--font-cn);
  font-size: 16px;
  font-weight: 600;
  color: var(--amber-deep);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.research-highlight-list { display: flex; flex-direction: column; gap: 10px; }
.highlight-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--charcoal);
  line-height: 1.6;
}
.highlight-dot {
  width: 6px; height: 6px;
  background: var(--amber-mid);
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 7px;
}

/* =========================================
   PLANT SCIENCE - 跳蚤草科学
   ========================================= */
.plant-section {
  background: linear-gradient(180deg, var(--forest-dew) 0%, var(--ivory) 100%);
}
.plant-hero {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 80px;
  align-items: center;
  margin-bottom: 80px;
}
.plant-visual-wrap {
  position: relative;
}
.plant-visual-main {
  background: linear-gradient(160deg, var(--forest-deep) 0%, var(--forest-mid) 100%);
  border-radius: 32px;
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.plant-visual-main-emoji { font-size: 120px; filter: drop-shadow(0 20px 40px rgba(0,0,0,0.3)); }
.plant-info-pills {
  position: absolute;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.plant-info-pills.left { left: -20px; top: 50%; transform: translateY(-50%); }
.plant-info-pills.right { right: -20px; top: 50%; transform: translateY(-50%); }
.plant-pill {
  background: white;
  border-radius: 12px;
  padding: 10px 14px;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--forest-deep);
  white-space: nowrap;
}
.plant-pill-icon { font-size: 18px; }
.plant-content {}
.plant-title {
  font-family: var(--font-cn);
  font-size: 36px;
  font-weight: 700;
  color: var(--forest-deep);
  margin-bottom: 20px;
  line-height: 1.3;
}
.plant-title .name {
  color: var(--forest-light);
  display: block;
  font-size: 28px;
}
.plant-desc {
  font-size: 15px;
  color: var(--stone);
  line-height: 2;
  margin-bottom: 32px;
}
.plant-props {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.plant-prop {
  background: white;
  border-radius: 12px;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid rgba(26,58,42,0.06);
}
.prop-text { font-size: 13px; color: var(--charcoal); font-weight: 500; }

/* =========================================
   SAFETY - 安全认证
   ========================================= */
.safety-section {
  background: var(--ivory);
}
.safety-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin-bottom: 60px;
}
.safety-cert-card {
  background: white;
  border-radius: 20px;
  padding: 28px 20px;
  text-align: center;
  border: 1px solid rgba(26,58,42,0.06);
  transition: var(--trans-base);
}
.safety-cert-card:hover {
  border-color: var(--forest-mist);
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}
.safety-cert-name {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--forest-deep);
  margin-bottom: 6px;
  line-height: 1.4;
}
.safety-cert-desc { font-size: 12px; color: var(--stone); line-height: 1.5; }

.safety-promise {
  background: linear-gradient(135deg, var(--forest-deep) 0%, var(--forest-mid) 100%);
  border-radius: 28px;
  padding: 60px;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 60px;
  align-items: center;
}
.safety-promise-left {}
.safety-promise-title {
  font-family: var(--font-cn);
  font-size: 32px;
  font-weight: 700;
  color: white;
  margin-bottom: 12px;
  line-height: 1.3;
}
.safety-promise-sub { font-size: 14px; color: rgba(255,255,255,0.55); }
.safety-promise-right {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.promise-item {
  text-align: center;
}
.promise-num {
  font-family: var(--font-en);
  font-size: 36px;
  font-weight: 700;
  color: var(--amber-light);
  line-height: 1;
  margin-bottom: 8px;
}
.promise-label {
  font-size: 13px;
  color: rgba(255,255,255,0.65);
  line-height: 1.5;
}

/* =========================================
   TESTIMONIALS - 用户评价
   ========================================= */
.testimonials-section {
  background: var(--warm-white);
}
.testimonials-track {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.testimonial-card {
  background: white;
  border-radius: 20px;
  padding: 32px;
  border: 1px solid rgba(26,58,42,0.06);
  transition: var(--trans-base);
  position: relative;
}
.testimonial-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--forest-mist);
}
.testimonial-quote-icon {
  font-size: 32px;
  color: var(--forest-mist);
  line-height: 1;
  margin-bottom: 16px;
  font-family: Georgia, serif;
}
.testimonial-text {
  font-size: 14px;
  color: var(--charcoal);
  line-height: 1.9;
  margin-bottom: 24px;
}
.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}
.testimonial-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  background-size: cover;
  background-position: center;
  flex-shrink: 0;
}
.testimonial-name { font-size: 14px; font-weight: 600; color: var(--forest-deep); margin-bottom: 2px; }
.testimonial-role { font-size: 12px; color: var(--stone); }
.testimonial-stars {
  margin-top: 4px;
  font-size: 12px;
  color: var(--amber-light);
  letter-spacing: 2px;
}
.testimonial-tag {
  position: absolute;
  top: 24px; right: 24px;
  font-size: 11px;
  background: var(--forest-dew);
  color: var(--forest-light);
  padding: 4px 10px;
  border-radius: 8px;
  font-weight: 500;
}

/* =========================================
   CTA SECTION
   ========================================= */
.cta-section {
  background: linear-gradient(135deg, var(--forest-deep) 0%, var(--forest-mid) 50%, #1a3a2a 100%);
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: -50%; left: -20%;
  width: 60%; height: 200%;
  background: radial-gradient(ellipse, rgba(74,140,98,0.12) 0%, transparent 70%);
}
.cta-section::after {
  content: '';
  position: absolute;
  bottom: -30%; right: -10%;
  width: 50%; height: 150%;
  background: radial-gradient(ellipse, rgba(196,133,58,0.08) 0%, transparent 70%);
}
.cta-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 100px 60px;
}
.cta-badge {
  display: inline-block;
  background: rgba(196,133,58,0.15);
  color: var(--amber-light);
  padding: 6px 20px;
  border-radius: 20px;
  font-size: 12px;
  letter-spacing: 0.2em;
  border: 1px solid rgba(196,133,58,0.2);
  margin-bottom: 32px;
}
.cta-title {
  font-family: var(--font-cn);
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 700;
  color: white;
  margin-bottom: 20px;
  line-height: 1.3;
}
.cta-desc {
  font-size: 16px;
  color: rgba(255,255,255,0.6);
  margin-bottom: 48px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.8;
}
.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.cta-channel-links {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 48px;
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.channel-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 40px;
  color: rgba(255,255,255,0.7);
  font-size: 13px;
  transition: var(--trans-base);
  cursor: pointer;
}
.channel-link:hover {
  background: rgba(255,255,255,0.12);
  color: white;
  border-color: rgba(255,255,255,0.2);
  transform: translateY(-2px);
}
.channel-icon {
  width: 24px;
  height: 24px;
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  display: inline-block;
  border-radius: 6px;
}
.channel-link img.channel-icon {
  width: 32px;
  height: 32px;
  object-fit: cover;
  background: none;
  border-radius: 8px;
}

/* =========================================
   FOOTER
   ========================================= */
footer {
  background: var(--ink);
  color: rgba(255,255,255,0.6);
}
.footer-main {
  padding: 80px 60px 60px;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 60px;
}
.footer-brand {}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}
.footer-logo-circle {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--forest-mid), var(--forest-light));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}
.footer-logo-name {
  font-family: var(--font-cn);
  font-size: 20px;
  font-weight: 600;
  color: white;
}
.footer-tagline {
  font-size: 13px;
  line-height: 1.8;
  margin-bottom: 28px;
  max-width: 260px;
}
.footer-social {
  display: flex;
  gap: 10px;
}
.social-btn {
  width: 36px; height: 36px;
  background: rgba(255,255,255,0.06);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px;
  cursor: pointer;
  transition: var(--trans-base);
  border: 1px solid rgba(255,255,255,0.06);
}
.social-btn:hover { background: var(--forest-mid); border-color: var(--forest-light); }
.footer-col-title {
  font-size: 14px;
  font-weight: 600;
  color: white;
  margin-bottom: 20px;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  font-size: 13px;
  color: rgba(255,255,255,0.45);
  transition: var(--trans-base);
}
.footer-links a:hover { color: rgba(255,255,255,0.85); padding-left: 6px; }
.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
  color: rgba(255,255,255,0.45);
  margin-bottom: 12px;
}
.footer-contact-item strong { color: white; display: block; margin-bottom: 2px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 24px 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: rgba(255,255,255,0.3);
}
.footer-bottom-links {
  display: flex;
  gap: 24px;
}
.footer-bottom-links a { color: rgba(255,255,255,0.3); }
.footer-bottom-links a:hover { color: rgba(255,255,255,0.6); }

/* =========================================
   PAGE HEADER (内页)
   ========================================= */
.page-hero {
  background: linear-gradient(160deg, var(--forest-deep) 0%, var(--forest-mid) 60%, #1f4530 100%);
  padding: 160px 60px 100px;
  position: relative;
  overflow: hidden;
}
.page-hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 80px;
  background: linear-gradient(to top, var(--ivory), transparent);
}
.page-hero-content { max-width: 700px; }
.page-hero-tag {
  display: inline-block;
  background: rgba(196,133,58,0.15);
  color: var(--amber-light);
  padding: 5px 14px;
  border-radius: 16px;
  font-size: 12px;
  letter-spacing: 0.15em;
  margin-bottom: 20px;
  border: 1px solid rgba(196,133,58,0.2);
}
.page-hero-title {
  font-family: var(--font-cn);
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 700;
  color: white;
  margin-bottom: 16px;
  line-height: 1.2;
}
.page-hero-desc {
  font-size: 16px;
  color: rgba(255,255,255,0.6);
  line-height: 1.9;
  max-width: 580px;
}
.page-hero-deco {
  position: absolute;
  right: 0; top: 0;
  width: 50%;
  height: 100%;
  background-image: url('../images/品牌中心/让大自然守护大自然配图.png');
  background-size: cover;
  background-position: center;
  mask-image: linear-gradient(to left, rgba(0,0,0,0.4) 0%, transparent 100%);
  -webkit-mask-image: linear-gradient(to left, rgba(0,0,0,0.4) 0%, transparent 100%);
  pointer-events: none;
}

/* =========================================
   BREADCRUMB 面包屑
   ========================================= */
.breadcrumb {
  background: var(--warm-white);
  padding: 16px 60px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--stone);
  border-bottom: 1px solid rgba(26,58,42,0.06);
}
.breadcrumb a { color: var(--stone); }
.breadcrumb a:hover { color: var(--forest-light); }
.breadcrumb-sep { color: var(--sand); }
.breadcrumb-current { color: var(--forest-mid); font-weight: 500; }

/* =========================================
   ANIMATIONS - 通用动画
   ========================================= */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}
.fade-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in-left.visible { opacity: 1; transform: translateX(0); }
.fade-in-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in-right.visible { opacity: 1; transform: translateX(0); }
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }

/* =========================================
   MOBILE MENU
   ========================================= */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 999;
  background: var(--forest-deep);
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  padding: 100px 40px 40px;
}
.mobile-menu.open { transform: translateX(0); }
.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}
.mobile-nav-link {
  display: block;
  padding: 16px 0;
  font-family: var(--font-cn);
  font-size: 22px;
  font-weight: 600;
  color: rgba(255,255,255,0.7);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: var(--trans-base);
}
.mobile-nav-link:hover { color: white; padding-left: 12px; }
.mobile-cta {
  margin-top: 40px;
  padding: 18px 40px;
  background: linear-gradient(135deg, var(--amber-mid), var(--amber-light));
  color: white;
  text-align: center;
  font-size: 16px;
  font-weight: 600;
  border-radius: 50px;
  cursor: pointer;
}
.mobile-close {
  position: absolute;
  top: 24px; right: 24px;
  width: 44px; height: 44px;
  background: rgba(255,255,255,0.08);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  font-size: 20px;
  color: white;
  transition: var(--trans-base);
}
.mobile-close:hover { background: rgba(255,255,255,0.15); }

/* =========================================
   RESPONSIVE
   ========================================= */
@media (max-width: 1200px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .safety-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-main { grid-template-columns: 1fr 1fr; gap: 40px; }
}

@media (max-width: 900px) {
  :root { --section-pad: 70px; }
  .navbar { padding: 0 24px; }
  .nav-menu { display: none; }
  .nav-burger { display: flex; }
  .hero-content { grid-template-columns: 1fr; padding: 100px 24px 60px; gap: 40px; }
  .hero-visual { display: none; }
  .container, .container-wide { padding: 0 24px; }
  .brand-story-grid { grid-template-columns: 1fr; gap: 40px; }
  .research-grid { grid-template-columns: 1fr; gap: 40px; }
  .plant-hero { grid-template-columns: 1fr; gap: 40px; }
  .safety-grid { grid-template-columns: repeat(2, 1fr); }
  .safety-promise { grid-template-columns: 1fr; padding: 40px; gap: 32px; }
  .safety-promise-right { grid-template-columns: repeat(3, 1fr); }
  .testimonials-track { grid-template-columns: 1fr; }
  .footer-main { grid-template-columns: 1fr; gap: 32px; padding: 48px 24px; }
  .footer-bottom { flex-direction: column; gap: 12px; padding: 20px 24px; text-align: center; }
  .breadcrumb { padding: 12px 24px; }
  .page-hero { padding: 120px 24px 80px; }
  .page-hero-deco { display: none; }
  .story-origin-text { font-size: 28px; }
  .story-origin-subtitle { font-size: 10px; letter-spacing: 2px; }
}

@media (max-width: 640px) {
  .features-grid { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: 1fr; }
  .research-data-cards { grid-template-columns: 1fr; }
  .hero-stats { flex-wrap: wrap; gap: 24px; }
  .safety-grid { grid-template-columns: 1fr 1fr; }
  .safety-promise-right { grid-template-columns: 1fr; }
  .story-milestones { grid-template-columns: 1fr; }
  .story-origin-text { font-size: 24px; }
  .story-origin-subtitle { font-size: 9px; letter-spacing: 1.5px; }
  .cta-inner { padding: 60px 24px; }
}

/* =========================================
   返回顶部
   ========================================= */
.back-top {
  position: fixed;
  bottom: 32px; right: 32px;
  width: 44px; height: 44px;
  background: var(--forest-deep);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: var(--trans-base);
  opacity: 0;
  transform: translateY(20px);
  z-index: 100;
  border: 1px solid rgba(74,140,98,0.2);
}
.back-top.visible { opacity: 1; transform: translateY(0); }
.back-top:hover { background: var(--forest-mid); transform: translateY(-4px); }
.back-top svg { width: 18px; height: 18px; stroke: white; fill: none; }