/* ============================================
   羚晨鲜果 Official Website
   Style: Minimalist / HEYTEA-inspired
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-bg: #FAFAF8;
  --color-bg-warm: #F5F3EE;
  --color-bg-cream: #F0EDE6;
  --color-text: #2C2C2C;
  --color-text-light: #7A7A72;
  --color-text-muted: #A8A89E;
  --color-accent: #6B7F5E;
  --color-accent-light: #8FA07E;
  --color-border: #E5E3DC;
  --color-white: #FFFFFF;
  --font-serif: 'Noto Serif SC', 'Songti SC', Georgia, serif;
  --font-sans: 'Noto Sans SC', -apple-system, 'PingFang SC', 'Helvetica Neue', sans-serif;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  --space-2xl: 10rem;
  --transition: 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.8;
  font-weight: 300;
  letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection {
  background: var(--color-accent);
  color: var(--color-white);
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

/* --- Container --- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container--narrow {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.5rem 0;
  transition: all 0.5s ease;
}

.nav.scrolled {
  background: rgba(250, 250, 248, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 1rem 0;
  box-shadow: 0 1px 0 var(--color-border);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: var(--color-text);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--color-text-light);
  position: relative;
  font-weight: 400;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width 0.3s ease;
}

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

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

.nav-cta {
  padding: 0.5rem 1.5rem !important;
  border: 1px solid var(--color-text);
  border-radius: 0;
  font-size: 0.75rem !important;
  letter-spacing: 0.12em !important;
  transition: all 0.3s ease !important;
}

.nav-cta:hover {
  background: var(--color-text) !important;
  color: var(--color-white) !important;
}

.nav-cta::after {
  display: none !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  width: 24px;
  height: 1.5px;
  background: var(--color-text);
  transition: all 0.3s ease;
}

/* --- Hero --- */
.hero {
  position: relative;
  height: 100vh;
  min-height: 700px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(139, 169, 120, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse at 70% 80%, rgba(200, 180, 140, 0.06) 0%, transparent 50%),
    linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-warm) 100%);
}

.hero-grain {
  position: absolute;
  inset: 0;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 0 var(--space-md);
}

.hero-sub {
  font-size: 0.7rem;
  letter-spacing: 0.35em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
  font-weight: 300;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 300;
  line-height: 1.6;
  letter-spacing: 0.12em;
  color: var(--color-text);
  margin-bottom: var(--space-md);
  cursor: default;
}

/* 山川文字效果 */
.hero-title-text {
  -webkit-text-fill-color: var(--color-text);
  transition: -webkit-text-fill-color 0.6s ease;
  background:
    /* 云雾层 — 白色半透明漂浮 */
    radial-gradient(ellipse 120px 25px at 20% 30%, rgba(255,255,255,0.6) 0%, transparent 100%),
    radial-gradient(ellipse 150px 30px at 65% 20%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(ellipse 100px 20px at 85% 45%, rgba(255,255,255,0.4) 0%, transparent 100%),
    /* 远山 */
    radial-gradient(ellipse 180px 80px at 15% 75%, #8a9e7a 0%, transparent 70%),
    radial-gradient(ellipse 200px 90px at 50% 68%, #7a9068 0%, transparent 70%),
    radial-gradient(ellipse 160px 75px at 85% 72%, #8a9e7a 0%, transparent 70%),
    /* 近山 */
    radial-gradient(ellipse 150px 70px at 30% 85%, #5a7a4a 0%, transparent 65%),
    radial-gradient(ellipse 170px 80px at 70% 80%, #4a6e3e 0%, transparent 65%),
    /* 水面 */
    linear-gradient(180deg, transparent 82%, #92aa82 88%, #7a9a6e 95%, #6a8a5e 100%),
    /* 天空渐变 */
    linear-gradient(180deg, #c8d8c0 0%, #d5e0ca 35%, #dde8d2 55%, #e5edd8 75%, #eaf0de 100%);
  background-size:
    120px 25px, 150px 30px, 100px 20px,
    180px 80px, 200px 90px, 160px 75px,
    150px 70px, 170px 80px,
    100% 100%, 100% 100%;
  background-position:
    20% 30%, 65% 20%, 85% 45%,
    15% 75%, 50% 68%, 85% 72%,
    30% 85%, 70% 80%,
    0 0, 0 0;
  background-repeat: no-repeat;
  -webkit-background-clip: text;
  background-clip: text;
}

.hero-title:hover .hero-title-text {
  -webkit-text-fill-color: transparent;
  animation: heroCloudShift 8s ease-in-out infinite;
}

/* 云雾和薄雾漂浮动画 */
@keyframes heroCloudShift {
  0% {
    background-position:
      20% 30%, 65% 20%, 85% 45%,
      15% 75%, 50% 68%, 85% 72%,
      30% 85%, 70% 80%,
      0 0, 0 0;
  }
  33% {
    background-position:
      28% 28%, 58% 22%, 78% 42%,
      15% 75%, 50% 68%, 85% 72%,
      30% 85%, 70% 80%,
      0 0, 0 0;
  }
  66% {
    background-position:
      15% 32%, 72% 18%, 90% 48%,
      15% 75%, 50% 68%, 85% 72%,
      30% 85%, 70% 80%,
      0 0, 0 0;
  }
  100% {
    background-position:
      20% 30%, 65% 20%, 85% 45%,
      15% 75%, 50% 68%, 85% 72%,
      30% 85%, 70% 80%,
      0 0, 0 0;
  }
}

.hero-desc {
  font-size: 0.85rem;
  letter-spacing: 0.25em;
  color: var(--color-text-light);
  font-weight: 300;
}

.hero-arrow {
  display: inline-block;
  margin-top: var(--space-xl);
  color: var(--color-text-muted);
  animation: float 3s ease-in-out infinite;
}

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

/* Fade up animation */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 1s ease forwards;
}

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Sections --- */
.section {
  padding: var(--space-2xl) 0;
}

.section-label {
  font-size: 0.65rem;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
  font-weight: 400;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 300;
  letter-spacing: 0.08em;
  line-height: 1.5;
  margin-bottom: var(--space-lg);
  color: var(--color-text);
}

.section-subtitle {
  font-size: 0.9rem;
  color: var(--color-text-light);
  max-width: 560px;
  line-height: 2;
  margin-bottom: var(--space-lg);
}

/* --- Brand Story --- */
.section--story {
  background: var(--color-white);
}


.story-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.story-text .story-lead {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  line-height: 2;
  color: var(--color-text);
  margin-bottom: var(--space-md);
  font-weight: 400;
}

.story-text p {
  color: var(--color-text-light);
  font-size: 0.9rem;
  line-height: 2.2;
  margin-bottom: var(--space-sm);
}

.story-image-placeholder {
  aspect-ratio: 4/5;
  background: var(--color-bg-warm);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.story-img-inner {
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse at 50% 40%, rgba(139, 169, 120, 0.12) 0%, transparent 70%),
    radial-gradient(ellipse at 30% 70%, rgba(200, 180, 140, 0.1) 0%, transparent 60%),
    var(--color-bg-warm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.img-text {
  font-family: var(--font-serif);
  font-size: 1rem;
  letter-spacing: 0.3em;
  color: var(--color-text-muted);
  font-weight: 300;
}

/* --- Origin --- */
.section--origin {
  padding: var(--space-xl) 0;
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
}

.origin-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
}

.origin-item {
  text-align: center;
  max-width: 320px;
}

.origin-char {
  font-family: var(--font-serif);
  font-size: 4rem;
  font-weight: 200;
  color: var(--color-accent);
  display: block;
  margin-bottom: var(--space-sm);
  line-height: 1.2;
}

.origin-item p {
  font-size: 0.85rem;
  color: var(--color-text-light);
  line-height: 2;
}

.origin-divider {
  width: 1px;
  height: 80px;
  background: var(--color-border);
}

/* --- Timeline --- */
.section--timeline {
  background: var(--color-bg);
}

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

.timeline-item {
  padding: var(--space-md);
  border-left: 1px solid var(--color-border);
}

.timeline-year {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 200;
  color: var(--color-accent);
  display: block;
  margin-bottom: var(--space-sm);
}

.timeline-content h4 {
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-xs);
}

.timeline-content p {
  font-size: 0.8rem;
  color: var(--color-text-light);
  line-height: 1.9;
}

/* --- Values --- */
.section--values {
  background: var(--color-bg);
  padding: var(--space-xl) 0;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  text-align: center;
}

.value-card {
  padding: var(--space-lg) var(--space-md);
}

.value-icon {
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.value-card h4 {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
}

.value-card p {
  font-size: 0.82rem;
  color: var(--color-text-light);
  line-height: 1.9;
}

/* --- Products --- */
.section--products {
  background: var(--color-white);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.product-card {
  background: var(--color-bg);
  transition: transform 0.5s ease;
  overflow: hidden;
}

.product-card:hover {
  transform: translateY(-4px);
}

.product-card--link {
  display: block;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  position: relative;
}

.product-card--link:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

.product-link-hint {
  display: block;
  margin-top: 0.6rem;
  font-size: 0.75rem;
  color: var(--color-accent);
  letter-spacing: 0.08em;
  opacity: 0.45;
  transition: opacity 0.35s ease;
}

.product-card--link:hover .product-link-hint {
  opacity: 1;
}

@media (max-width: 768px) {
  .product-link-hint {
    opacity: 0.7;
    font-size: 0.8rem;
  }
}

.product-img {
  aspect-ratio: 16/10;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.product-img span {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  letter-spacing: 0.25em;
  color: var(--color-text-muted);
  font-weight: 300;
  z-index: 1;
}

.product-img--1 {
  background:
    radial-gradient(ellipse at 40% 50%, rgba(180, 140, 100, 0.1) 0%, transparent 70%),
    linear-gradient(135deg, #F0EDE6, #E8E4DA);
}
.product-img--2 {
  background:
    radial-gradient(ellipse at 60% 40%, rgba(220, 150, 140, 0.1) 0%, transparent 60%),
    linear-gradient(135deg, #F2ECE6, #EBE5DC);
}
.product-img--3 {
  background:
    radial-gradient(ellipse at 50% 50%, rgba(200, 160, 80, 0.1) 0%, transparent 60%),
    linear-gradient(135deg, #F0ECDF, #E8E3D6);
}
.product-img--4 {
  background:
    radial-gradient(ellipse at 40% 60%, rgba(139, 169, 120, 0.1) 0%, transparent 60%),
    linear-gradient(135deg, #ECF0E6, #E4E8DC);
}

.product-info {
  padding: var(--space-md) var(--space-md) calc(var(--space-md) + 0.5rem);
}

.product-info h3 {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-xs);
}

.product-info p {
  font-size: 0.8rem;
  color: var(--color-text-light);
  line-height: 2;
}

/* --- Services --- */
.section--services {
  background: var(--color-bg);
}

.service-block {
  margin-bottom: var(--space-xl);
}

.service-block:last-child {
  margin-bottom: 0;
}

.service-block-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
}

.service-tag {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: 0.1em;
}

.service-tag-en {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--color-text-muted);
  font-weight: 300;
}

.service-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-md);
}

.service-card {
  padding: var(--space-md);
  background: var(--color-white);
  border: 1px solid transparent;
  transition: border-color 0.4s ease;
}

.service-card:hover {
  border-color: var(--color-border);
}

.service-card h4 {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-xs);
}

.service-card p {
  font-size: 0.8rem;
  color: var(--color-text-light);
  line-height: 2;
}

/* --- Custom --- */
.section--custom {
  background: var(--color-white);
}

.custom-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.custom-item {
  padding: var(--space-lg) var(--space-md);
  border: 1px solid var(--color-border);
  transition: all 0.4s ease;
}

.custom-item:hover {
  border-color: var(--color-accent-light);
}

.custom-num {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 200;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.custom-item h4 {
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-xs);
}

.custom-item p {
  font-size: 0.8rem;
  color: var(--color-text-light);
  line-height: 2;
}

/* --- Stats / Strengths --- */
.section--strengths {
  background: var(--color-bg-warm);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-sm);
  text-align: center;
}

.stat-card {
  padding: var(--space-lg) var(--space-sm);
}

.stat-number {
  font-family: var(--font-serif);
  font-size: 2.4rem;
  font-weight: 200;
  color: var(--color-accent);
  display: block;
  line-height: 1.2;
  margin-bottom: var(--space-xs);
}

.stat-number sup {
  font-size: 1.2rem;
  vertical-align: super;
}

.stat-unit {
  font-size: 1rem;
  font-weight: 300;
}

.stat-label {
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 4px;
}

.stat-desc {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  display: block;
}

/* --- Supply Chain --- */
.section--chain {
  background: var(--color-bg-warm);
  padding: 0 0 var(--space-2xl) 0;
}

.chain-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.chain-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  text-align: center;
}

.chain-icon {
  color: var(--color-accent);
  width: 56px;
  height: 56px;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.chain-step span:last-child {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--color-text-light);
}

.chain-arrow {
  font-size: 1.2rem;
  color: var(--color-text-muted);
  margin-top: -1.5rem;
}

/* --- Partners --- */
.section--partners {
  background: var(--color-white);
  text-align: center;
}

.partner-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
  margin-bottom: var(--space-xl);
}

.partner-logo {
  font-size: 0.9rem;
  letter-spacing: 0.15em;
  color: var(--color-text-muted);
  font-weight: 400;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  transition: all 0.3s ease;
}

.partner-logo:hover {
  border-color: var(--color-accent-light);
  color: var(--color-text);
}

.testimonial {
  max-width: 640px;
  margin: 0 auto;
}

.testimonial blockquote {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 300;
  line-height: 2.2;
  color: var(--color-text);
  font-style: italic;
  margin-bottom: var(--space-sm);
}

.testimonial cite {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  font-style: normal;
  letter-spacing: 0.08em;
}

/* --- CSR --- */
.section--csr {
  background: var(--color-bg);
  text-align: center;
}

.csr-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.csr-item h4 {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-xs);
}

.csr-item p {
  font-size: 0.8rem;
  color: var(--color-text-light);
  line-height: 2;
}

/* --- Contact --- */
.section--contact {
  background: var(--color-bg-warm);
  text-align: center;
  padding: var(--space-2xl) 0;
}

.contact-lead {
  font-size: 0.85rem;
  letter-spacing: 0.3em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.contact-title {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 300;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-xl);
}

.contact-info {
  display: flex;
  justify-content: center;
  gap: var(--space-xl);
  flex-wrap: wrap;
}

.contact-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.contact-label {
  font-size: 0.65rem;
  letter-spacing: 0.3em;
  color: var(--color-text-muted);
  text-transform: uppercase;
}

.contact-item span:last-child {
  font-size: 0.88rem;
  letter-spacing: 0.05em;
  font-weight: 400;
}

/* --- Footer --- */
.footer {
  background: var(--color-text);
  color: var(--color-bg);
  padding: var(--space-lg) 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: 1rem;
  letter-spacing: 0.15em;
  font-weight: 400;
}

.footer-text {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: rgba(250, 250, 248, 0.5);
}

.footer-copy {
  font-size: 0.68rem;
  color: rgba(250, 250, 248, 0.3);
  letter-spacing: 0.03em;
}

/* --- Reveal Animation --- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* --- Responsive --- */
@media (max-width: 1024px) {
  .stats-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

@media (max-width: 768px) {
  :root {
    --space-xl: 4rem;
    --space-2xl: 6rem;
  }

  .nav-links {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(250, 250, 248, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    z-index: 99;
  }

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

  .nav-toggle {
    display: flex;
    z-index: 101;
  }

  .nav-toggle.open span:first-child {
    transform: rotate(45deg) translate(3px, 3px);
  }

  .nav-toggle.open span:last-child {
    transform: rotate(-45deg) translate(3px, -3px);
  }

  .story-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .story-visual {
    order: -1;
  }

  .story-image-placeholder {
    aspect-ratio: 3/2;
  }

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

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

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

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

  .values-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .csr-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .origin-grid {
    flex-direction: column;
    gap: var(--space-lg);
  }

  .origin-divider {
    width: 60px;
    height: 1px;
  }

  .contact-info {
    flex-direction: column;
    gap: var(--space-md);
  }

  .footer-inner {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }

  .chain-arrow {
    display: none;
  }

  .chain-flow {
    gap: var(--space-sm);
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.8rem;
  }

  .section-title {
    font-size: 1.4rem;
  }

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

  .partner-logos {
    gap: var(--space-sm);
  }
}


/* =============================================
   产品卡片悬停动画
   ============================================= */

/* 叠加层容器 */
.product-svg-scene {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.45s ease;
  pointer-events: none;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-svg-scene svg {
  width: 100%;
  height: 100%;
}

.product-img.hovering .product-svg-scene {
  opacity: 1;
}

.product-img.hovering > span {
  opacity: 0;
  transition: opacity 0.3s ease;
}

.product-img > span {
  transition: opacity 0.4s ease;
}

/* --- Card 1: 礼盒打开山川 --- */

.box-lid {
  transform-origin: 56px 124px;
  transition: transform 0.8s cubic-bezier(.42, 0, .18, 1);
}

.playing .box-lid {
  transform: rotate(-50deg);
  transition-delay: 0.15s;
}

.mtn {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(.34, 1.4, .64, 1);
}

.playing .mtn-far {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.3s;
}

.playing .mtn-mid {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.45s;
}

.playing .mtn-near {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.6s;
}

.playing .river {
  animation: riverDraw 1s ease forwards;
  animation-delay: 0.6s;
}

.tree-line,
.tree-crown {
  opacity: 0;
  transition: opacity 0.5s ease;
}

.playing .tree-line,
.playing .tree-crown {
  opacity: 1;
  transition-delay: 0.9s;
}

.ribbon {
  transition: opacity 0.4s ease;
}

.playing .ribbon {
  opacity: 0.6;
  transition-delay: 0.1s;
}

@keyframes riverDraw {
  to { stroke-dashoffset: 0; }
}

/* --- Card 2: 桃树桃子变红 --- */

.trunk {
  transition: stroke-dashoffset 0.8s ease;
}

.playing .trunk {
  stroke-dashoffset: 0;
}

.branch {
  transition: stroke-dashoffset 0.6s ease;
}

.playing .branch-1 { stroke-dashoffset: 0; transition-delay: 0.35s; }
.playing .branch-2 { stroke-dashoffset: 0; transition-delay: 0.45s; }
.playing .branch-3 { stroke-dashoffset: 0; transition-delay: 0.5s; }
.playing .branch-4 { stroke-dashoffset: 0; transition-delay: 0.55s; }

.leaf {
  opacity: 0;
  transform: scale(0.3);
  transition: opacity 0.4s ease, transform 0.4s cubic-bezier(.34, 1.4, .64, 1);
}

.playing .leaf-1 { opacity: 1; transform: scale(1); transition-delay: 0.55s; }
.playing .leaf-2 { opacity: 1; transform: scale(1); transition-delay: 0.6s; }
.playing .leaf-3 { opacity: 1; transform: scale(1); transition-delay: 0.65s; }
.playing .leaf-4 { opacity: 1; transform: scale(1); transition-delay: 0.7s; }
.playing .leaf-5 { opacity: 1; transform: scale(1); transition-delay: 0.72s; }
.playing .leaf-6 { opacity: 1; transform: scale(1); transition-delay: 0.75s; }

.peach-red {
  transition: opacity 1.8s ease;
}

.playing .peach-red {
  opacity: 1;
  transition-delay: 0.8s;
}

/* --- Card 3: 橙子落下 --- */

.tree-trunk,
.tree-canopy {
  opacity: 0;
  transition: opacity 0.5s ease;
}

.playing .tree-trunk,
.playing .tree-canopy {
  opacity: 1;
}

.ground {
  opacity: 0;
  transition: opacity 0.5s ease 0.3s;
}

.playing .ground {
  opacity: 1;
}

.orange {
  animation: none;
}

.playing .orange--1 { animation: orangeFall1 0.9s cubic-bezier(.55, 0, 1, .45) 0.5s forwards; }
.playing .orange--2 { animation: orangeFall2 0.85s cubic-bezier(.55, 0, 1, .45) 0.85s forwards; }
.playing .orange--3 { animation: orangeFall3 0.95s cubic-bezier(.55, 0, 1, .45) 1.2s forwards; }
.playing .orange--4 { animation: orangeFall4 0.8s cubic-bezier(.55, 0, 1, .45) 1.5s forwards; }
.playing .orange--5 { animation: orangeFall5 0.9s cubic-bezier(.55, 0, 1, .45) 1.8s forwards; }

@keyframes orangeFall1 {
  0%   { transform: translate(0, 0) rotate(0deg); }
  8%   { transform: translate(-2px, -2px) rotate(-4deg); }
  15%  { transform: translate(2px, 0) rotate(3deg); }
  100% { transform: translate(-15px, 100px) rotate(-35deg); opacity: 0.7; }
}

@keyframes orangeFall2 {
  0%   { transform: translate(0, 0) rotate(0deg); }
  10%  { transform: translate(1px, -2px) rotate(3deg); }
  100% { transform: translate(10px, 115px) rotate(40deg); opacity: 0.7; }
}

@keyframes orangeFall3 {
  0%   { transform: translate(0, 0) rotate(0deg); }
  8%   { transform: translate(-1px, -3px) rotate(-5deg); }
  15%  { transform: translate(2px, -1px) rotate(2deg); }
  100% { transform: translate(-20px, 102px) rotate(-45deg); opacity: 0.7; }
}

@keyframes orangeFall4 {
  0%   { transform: translate(0, 0) rotate(0deg); }
  12%  { transform: translate(2px, -2px) rotate(5deg); }
  100% { transform: translate(18px, 108px) rotate(50deg); opacity: 0.7; }
}

@keyframes orangeFall5 {
  0%   { transform: translate(0, 0) rotate(0deg); }
  10%  { transform: translate(-2px, -1px) rotate(-3deg); }
  100% { transform: translate(-8px, 98px) rotate(-30deg); opacity: 0.7; }
}

/* --- Card 4: 卡片扇形展开 --- */

.fan-card {
  transform-origin: 150px 180px;
  transition: transform 0.7s cubic-bezier(.34, 1.56, .64, 1);
}

.playing .fan-card--1 { transform: rotate(-28deg) translateY(-5px); }
.playing .fan-card--2 { transform: rotate(-14deg) translateY(-3px); }
.playing .fan-card--3 { transform: rotate(0deg) translateY(-2px); }
.playing .fan-card--4 { transform: rotate(14deg) translateY(-3px); }
.playing .fan-card--5 { transform: rotate(28deg) translateY(-5px); }

.playing .fan-card--1 { transition-delay: 0.15s; }
.playing .fan-card--2 { transition-delay: 0.1s; }
.playing .fan-card--3 { transition-delay: 0.05s; }
.playing .fan-card--4 { transition-delay: 0.1s; }
.playing .fan-card--5 { transition-delay: 0.15s; }

/* --- 触屏设备禁用悬停动画 --- */
@media (hover: none) {
  .product-svg-scene {
    display: none;
  }
}

/* --- 移动端简化 --- */
@media (max-width: 768px) {
  .product-svg-scene {
    display: none;
  }
}