/* ===== CSS Variables ===== */
:root {
  --color-primary: #1C1917;
  --color-on-primary: #FFFFFF;
  --color-secondary: #44403C;
  --color-on-secondary: #FFFFFF;
  --color-accent: #A16207;
  --color-on-accent: #FFFFFF;
  --color-background: #FAFAF9;
  --color-foreground: #0C0A09;
  --color-card: #FFFFFF;
  --color-card-foreground: #0C0A09;
  --color-muted: #E8ECF0;
  --color-muted-foreground: #64748B;
  --color-border: #D6D3D1;
  --color-destructive: #DC2626;
  --color-ring: #1C1917;
  --color-gold-light: #D4A853;
  --color-gold-dark: #8B6914;

  --font-heading: 'Noto Serif SC', 'Source Han Serif SC', 'Songti SC', 'STSong', 'SimSun', serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 48px rgba(0,0,0,0.12);
  --shadow-xl: 0 24px 80px rgba(0,0,0,0.16);

  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  --nav-height: 80px;
  --max-width: 1440px;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-y: scroll;
  overflow-x: hidden;
  scroll-behavior: smooth;
  scroll-snap-type: y mandatory;
  scroll-padding-top: var(--nav-height);
  min-width: 320px;
}

body {
  font-family: var(--font-body);
  background: var(--color-background);
  color: var(--color-foreground);
  line-height: 1.6;
  cursor: default;
  min-width: 320px;
}

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

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img, video { max-width: 100%; height: auto; display: block; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
}

/* ===== Top Bar (Progress + Nav container) ===== */
.top-bar {
  position: fixed;
  top: 0;
  left: 0;
  min-width: 320px;
  width: 100%;
  z-index: 1000;
}

/* ===== Cursor Follower ===== */
.cursor-follower {
  display: none;
}

/* ===== Navigation ===== */
.nav {
  min-width: 320px;
  transition: all 0.5s var(--ease-out-expo);
  padding: 0 40px;
  background: rgba(28, 25, 23, 0.35);
  backdrop-filter: blur(20px) saturate(150%);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
}
.nav.scrolled {
  background: rgba(250, 250, 249, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 24px rgba(0,0,0,0.06);
}
.nav.nav-dark {
  background: rgba(28, 25, 23, 0.85);
  backdrop-filter: blur(20px) saturate(150%);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
  box-shadow: none;
}
.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  white-space: nowrap;
  flex-shrink: 0;
  color: #fff;
  transition: color 0.5s;
}
.nav.scrolled .nav-logo { color: var(--color-primary); }
.nav.nav-dark .nav-logo { color: #fff; }
.logo-icon {
  width: 38px;
  height: 38px;
  object-fit: contain;
  border-radius: var(--radius-sm);
  transition: filter 0.5s;
}
.nav.scrolled .logo-icon {
  filter: none;
}
.nav.nav-dark .logo-icon { }
.footer-logo .logo-icon {
  width: 42px;
  height: 42px;
}
.nav-links {
  display: flex;
  flex-wrap: nowrap;
  gap: 20px;
}
.nav-link {
  font-size: 0.85rem;
  white-space: nowrap;
  font-weight: 500;
  color: rgba(255,255,255,0.85);
  transition: color 0.3s, color 0.5s;
  position: relative;
  padding: 4px 0;
}
.nav.scrolled .nav-link { color: var(--color-secondary); }
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--color-accent);
  transition: width 0.3s var(--ease-out-expo);
}
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.nav-link:hover, .nav-link.active { color: var(--color-accent); }
.nav.scrolled .nav-link:hover, .nav.scrolled .nav-link.active { color: var(--color-accent); }

.nav-cta {
  padding: 8px 20px !important;
  background: var(--color-accent);
  border-radius: 50px;
  color: #fff !important;
  font-weight: 600 !important;
  transition: all 0.3s !important;
}
.nav-cta:hover {
  background: var(--color-gold-light) !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(161, 98, 7, 0.4);
}
.nav.scrolled .nav-cta {
  background: var(--color-accent);
  color: #fff !important;
}
.nav.scrolled .nav-cta:hover {
  background: var(--color-gold-dark) !important;
}
.nav-cta::after { display: none; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}
.nav-toggle span {
  width: 24px;
  height: 2px;
  background: #fff;
}
.nav.scrolled .nav-toggle span { background: var(--color-primary); }
/* ===== Hero Section ===== */
.hero {
  position: relative;
  height: 100vh;
  min-height: 700px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  scroll-snap-align: start;
}
.hero-video-placeholder {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 1s ease;
}
.hero-video-2, .hero-video-3 {
  opacity: 0;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(28, 25, 23, 0.65) 0%,
    rgba(28, 25, 23, 0.45) 40%,
    rgba(28, 25, 23, 0.7) 100%
  );
  z-index: 1;
}
.hero-grain {
  position: absolute;
  inset: 0;
  z-index: 2;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  color: #fff;
  max-width: 800px;
  padding: 0 24px;
}
.hero-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  color: var(--color-gold-light);
  margin-bottom: 32px;
  font-weight: 500;
}
.badge-line {
  width: 32px;
  height: 1px;
  background: var(--color-gold-light);
  opacity: 0.6;
}
.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(4rem, 8vw, 7rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 20px;
  letter-spacing: 0.08em;
}
.title-line {
  display: block;
  background: linear-gradient(180deg, #fff 20%, rgba(255,255,255,0.75) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-logo {
  display: block;
  max-width: 600px;
  width: 80%;
  height: auto;
  margin: 0 auto;
}
.hero-subtitle {
  font-family: var(--font-heading);
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  font-weight: 500;
  color: var(--color-gold-light);
  margin-bottom: 12px;
  letter-spacing: 0.15em;
}
.hero-desc {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.7);
  margin-bottom: 48px;
  letter-spacing: 0.05em;
}
.hero-cta {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  padding: 16px 40px;
  background: var(--color-accent);
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 50px;
  letter-spacing: 0.05em;
  transition: all 0.4s var(--ease-out-expo);
  position: relative;
  overflow: hidden;
}
.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--color-gold-light), var(--color-accent));
  opacity: 0;
  transition: opacity 0.4s;
}
.btn-primary:hover::before { opacity: 1; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(161, 98, 7, 0.4); }
.btn-primary span { position: relative; z-index: 1; }

.btn-outline {
  display: inline-flex;
  align-items: center;
  padding: 16px 40px;
  border: 1.5px solid rgba(255,255,255,0.35);
  color: #fff;
  font-weight: 500;
  font-size: 0.95rem;
  border-radius: 50px;
  letter-spacing: 0.05em;
  transition: all 0.4s var(--ease-out-expo);
  backdrop-filter: blur(4px);
}
.btn-outline:hover {
  border-color: #fff;
  background: rgba(255,255,255,0.08);
  transform: translateY(-2px);
}

.hero-ambient-light {
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse, rgba(161, 98, 7, 0.12) 0%, transparent 70%);
  pointer-events: none;
  z-index: 1;
  animation: ambientFloat 8s ease-in-out infinite;
}
@keyframes ambientFloat {
  0%, 100% { transform: translateX(-50%) translateY(0) scale(1); }
  50% { transform: translateX(-50%) translateY(-30px) scale(1.1); }
}

/* ===== Scroll Indicator ===== */
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  color: rgba(255,255,255,0.6);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
}
.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, rgba(255,255,255,0.6), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(1.3); }
}

/* ===== Sections Common ===== */
.section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-height) - 40px) 0 60px;
  position: relative;
  overflow-x: hidden;
  scroll-snap-align: start;
}
.section-bg-text {
  position: absolute;
  top: 60px;
  right: -60px;
  font-family: var(--font-heading);
  font-size: 14rem;
  font-weight: 900;
  color: rgba(28, 25, 23, 0.018);
  pointer-events: none;
  line-height: 1;
  white-space: nowrap;
  user-select: none;
}
.section-header {
  text-align: center;
  margin-bottom: 40px;
}
.section-tag {
  display: inline-block;
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 48px;
  padding: 6px 26px;
  border: 1.5px solid rgba(161, 98, 7, 0.25);
  border-radius: 50px;
}
.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-primary);
  white-space: nowrap;
}
.title-accent {
  color: var(--color-accent);
  display: inline-block;
}
.section-title-en {
  display: block;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--color-muted-foreground);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 6px;
  opacity: 0.65;
}
.section-desc {
  margin-top: 12px;
  font-size: 1.05rem;
  color: var(--color-muted-foreground);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== Glass Card ===== */
.glass-card {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(214, 211, 209, 0.4);
  border-radius: var(--radius-lg);
  transition: all 0.5s var(--ease-out-expo);
  position: relative;
  overflow: hidden;
}
.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(161, 98, 7, 0.15);
  background: rgba(255, 255, 255, 0.85);
}

/* ===== About Section ===== */
.about {
  position: relative;
  background: url('../image/about.webp') center/cover fixed;
}
.about::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.88);
  z-index: 0;
  pointer-events: none;
  transition: background 1.5s var(--ease-out-expo);
}
.about.mist-cleared::before {
  background: rgba(255, 255, 255, 0.78);
}
.about .container {
  position: relative;
  z-index: 1;
}

/* ---- 文字区 ---- */
.about-grid {
  display: flex;
  flex-direction: column;
  gap: 36px;
  max-width: 900px;
  margin: 0 auto;
}
.about-text {
  max-width: 780px;
  margin: 0 auto;
  text-align: center;
}
.about-lead {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  line-height: 1.85;
  color: var(--color-primary);
  margin-bottom: 0;
}
.about-lead strong {
  color: var(--color-accent);
  font-weight: 700;
}
.text-accent {
  color: var(--color-accent);
  font-weight: 600;
}
.about-divider {
  width: 48px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  margin: 18px auto;
}
.about-body {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--color-secondary);
}

/* ---- 数据卡片区 ---- */
.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 48px;
}
.stat-card-v2 {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(214, 211, 209, 0.4);
  border-radius: var(--radius-lg);
  padding: 24px 20px 20px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  transition: all 0.5s var(--ease-out-expo);
}
.stat-card-v2:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(161, 98, 7, 0.15);
  background: rgba(255, 255, 255, 0.85);
}
.stat-card-v2 .stat-icon {
  color: var(--color-accent);
  margin-bottom: 2px;
  opacity: 0.7;
}
.stat-card-v2 .stat-icon svg {
  width: 24px; height: 24px;
}
.stat-number {
  font-family: var(--font-heading);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
}
.stat-number-wrap {
  display: flex;
  align-items: baseline;
  gap: 2px;
}
.stat-number-wrap .stat-number { font-size: 2.4rem; }
.stat-unit {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-accent);
}
.stat-label {
  font-size: 0.85rem;
  color: var(--color-primary);
  font-weight: 600;
}
.stat-desc {
  font-size: 0.75rem;
  color: var(--color-muted-foreground);
}

/* ===== Footer Quote ===== */
.footer-quote {
  text-align: center;
  padding-bottom: 64px;
  margin-bottom: 64px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-quote-text {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 600;
  color: var(--color-gold-light);
  line-height: 1.5;
  letter-spacing: 0.08em;
}
.footer-quote-author {
  margin-top: 16px;
  color: rgba(255,255,255,0.4);
  font-size: 0.95rem;
  letter-spacing: 0.1em;
}

/* ===== Section Background ===== */
.business, .ecosystem, .future {
  position: relative;
  background: url('../image/bg.webp') center/cover fixed;
}
.business::before, .ecosystem::before, .future::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.7);
  z-index: 0;
  pointer-events: none;
}
.business .container, .ecosystem .container, .future .container {
  position: relative;
  z-index: 1;
}

/* ===== Business Section ===== */
.business-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.business-card {
  padding: 32px 22px;
  text-align: center;
}
.business-card .card-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 18px;
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
}
.business-card .card-icon svg {
  width: 42px;
  height: 42px;
}
.business-card h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  margin-bottom: 8px;
  color: var(--color-primary);
}
.business-card p {
  font-size: 0.85rem;
  line-height: 1.65;
  color: var(--color-muted-foreground);
}
.card-shine {
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at center, rgba(161, 98, 7, 0.04) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.5s;
  pointer-events: none;
}
.business-card:hover .card-shine { opacity: 1; }

/* ===== Quality Section ===== */
.quality {
  position: relative;
  background: url('../image/gufaliangjiu.webp') center/cover fixed;
}
.quality::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.97);
  z-index: 0;
  pointer-events: none;
  transition: background 1.5s var(--ease-out-expo);
}
.quality.mist-cleared::before {
  background: rgba(255, 255, 255, 0.9);
}
.quality .container {
  position: relative;
  z-index: 1;
}
.quality-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.quality-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px;
  background: url('../image/technique.webp') center/cover;
  position: relative;
}
.quality-main::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: rgba(28, 25, 23, 0.55);
  z-index: 1;
}
.quality-main .quality-radial {
  position: relative;
  z-index: 2;
}
.quality-main:hover {
  background: url('../image/technique.webp') center/cover;
  transform: none;
  box-shadow: var(--shadow-md);
}
.quality-radial {
  position: relative;
  width: 220px;
  height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.radial-ring {
  position: absolute;
  border-radius: 50%;
  border: 1.5px solid rgba(212, 168, 83, 0.3);
  animation: ringPulse 4s ease-in-out infinite;
}
.ring-1 { width: 100%; height: 100%; animation-delay: 0s; }
.ring-2 { width: 70%; height: 70%; animation-delay: 0.5s; }
.ring-3 { width: 40%; height: 40%; animation-delay: 1s; }
@keyframes ringPulse {
  0%, 100% { border-color: rgba(212, 168, 83, 0.2); transform: scale(1); }
  50% { border-color: rgba(212, 168, 83, 0.55); transform: scale(1.03); }
}
.radial-center {
  text-align: center;
  z-index: 2;
}
.radial-label {
  display: block;
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-gold-light);
  line-height: 1.1;
}
.radial-label-sub {
  font-size: 1rem;
  color: rgba(212, 168, 83, 0.7);
  letter-spacing: 0.2em;
}
.quality-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.quality-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px;
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid rgba(214, 211, 209, 0.25);
  border-radius: 12px;
  transition: all 0.3s var(--ease-out-expo);
}
.quality-item:hover {
  background: rgba(255, 255, 255, 0.9);
  border-color: rgba(161, 98, 7, 0.2);
  box-shadow: 0 2px 16px rgba(0,0,0,0.04);
  transform: translateY(-1px);
}
.quality-item:last-child {
  grid-column: auto;
}
.quality-num {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
  opacity: 0.3;
  flex-shrink: 0;
  min-width: 2.5rem;
}
.quality-item h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 4px;
}
.quality-item p {
  font-size: 0.88rem;
  color: var(--color-muted-foreground);
  line-height: 1.6;
}

/* ===== Ecosystem Section ===== */
.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}
.eco-card {
  text-align: center;
  padding: 36px 20px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.68);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(214, 211, 209, 0.35);
  transition: all 0.5s var(--ease-out-expo);
}
.eco-card:hover {
  background: rgba(255, 255, 255, 0.88);
  border-color: rgba(161, 98, 7, 0.2);
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}
.eco-icon-wrap {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(161, 98, 7, 0.08), rgba(212, 168, 83, 0.06));
  color: var(--color-accent);
}
.eco-icon-wrap svg {
  width: 28px;
  height: 28px;
}
.eco-card h4 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  margin-bottom: 6px;
  color: var(--color-primary);
}
.eco-card p {
  font-size: 0.82rem;
  color: var(--color-muted-foreground);
  line-height: 1.5;
}

.eco-highlight {
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 32px 40px;
  margin-top: 16px;
}
.eco-highlight-content h3 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--color-primary);
  margin-bottom: 12px;
}
.eco-highlight-content p {
  font-size: 0.95rem;
  color: var(--color-secondary);
  line-height: 1.8;
}
.eco-highlight-icon {
  flex-shrink: 0;
  width: 80px;
  height: 80px;
  color: var(--color-accent);
}

/* ===== Culture Section ===== */
.culture {
  position: relative;
  background: url('../image/bg.webp') center/cover fixed;
}
.culture::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.7);
  z-index: 0;
  pointer-events: none;
}
.culture .container {
  position: relative;
  z-index: 1;
}
.culture-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.culture-card {
  padding: 32px;
}
.culture-card h4 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  color: var(--color-accent);
  margin-bottom: 8px;
}
.culture-card p {
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--color-secondary);
}

/* ===== Future Section ===== */
.future-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}
.future-block .section-tag {
  margin-bottom: 20px;
}
.future-block h3 {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-primary);
  margin-bottom: 10px;
}
.future-block .section-title-en {
  margin-bottom: 16px;
}
.future-block p {
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--color-secondary);
}
.future-quote {
  margin-top: 16px;
  padding-left: 16px;
  border-left: 3px solid var(--color-accent);
  font-family: var(--font-heading);
  font-size: 1.05rem !important;
  color: var(--color-accent) !important;
  font-weight: 500;
}

/* ===== Footer ===== */
.footer {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background: var(--color-primary);
  color: rgba(255,255,255,0.7);
  scroll-snap-align: start;
}
.footer::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('../image/bg2.webp') center/cover;
  opacity: 0.08;
  z-index: 0;
}
.footer .container {
  position: relative;
  z-index: 1;
}
.footer .container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 100vh;
  padding: 80px 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  margin-bottom: 60px;
}
.footer-brand p {
  font-size: 0.9rem;
  margin-top: 8px;
  line-height: 1.6;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}
.footer-brand-logo-wrap {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}
.footer-brand-icon {
  width: 48px;
  height: 48px;
  object-fit: contain;
}
.footer-brand-text {
  height: 36px;
  object-fit: contain;
}
.footer-links h4, .footer-contact h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: rgba(255,255,255,0.9);
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}
.footer-links a {
  display: block;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.5);
  margin-bottom: 10px;
  transition: color 0.3s;
}
.footer-links a:hover { color: var(--color-gold-light); }
.footer-contact p {
  font-size: 0.9rem;
  margin-bottom: 6px;
}
.footer-info {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.6;
}
.footer-icon {
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--color-gold-light);
  opacity: 0.7;
}
.footer-qr-row {
  display: flex;
  gap: 20px;
  margin: 20px 0 16px;
}
.qr-placeholder {
  text-align: center;
  font-size: 0.75rem;
  color: rgba(255,255,255,0.4);
}
.qr-box {
  width: 88px;
  height: 88px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 8px;
  cursor: pointer;
}
.qr-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.3s ease;
}
.qr-placeholder:hover .qr-box img {
  transform: scale(1.8);
  z-index: 10;
  position: relative;
}
.footer-note {
  font-size: 0.8rem !important;
  color: rgba(255,255,255,0.35) !important;
  margin-top: 20px !important;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 32px;
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.35);
}

/* ===== Reveal Animations ===== */
.reveal-up {
  opacity: 0;
  transform: translateY(48px);
  transition: opacity 0.9s var(--ease-out-expo), transform 0.9s var(--ease-out-expo);
}
.reveal-up.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-up.delay-1 { transition-delay: 0.1s; }
.reveal-up.delay-2 { transition-delay: 0.2s; }
.reveal-up.delay-3 { transition-delay: 0.3s; }
.reveal-up.delay-4 { transition-delay: 0.4s; }
.reveal-up.delay-5 { transition-delay: 0.5s; }

/* Parallax Reveal */
.reveal-parallax {
  opacity: 0;
  transform: translateY(60px);
  transition: opacity 1s var(--ease-out-expo), transform 1s var(--ease-out-expo);
}
.reveal-parallax.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal-up, .reveal-parallax { opacity: 1; transform: none; }
}

/* ===== 宽屏桌面：恢复原始导航尺寸 ===== */
@media (min-width: 1200px) {
  .nav-links { gap: 36px; }
  .nav-link { font-size: 0.9rem; }
}

/* ===== 超宽屏 1440px+：内容放大 ===== */
@media (min-width: 1440px) {
  /* Hero（图片为主） */
  .hero-content { max-width: 960px; }
  .hero-logo { max-width: 720px; }
  .hero-subtitle { font-size: clamp(1.2rem, 2.5vw, 1.8rem); }
  .hero-desc { font-size: 1.15rem; }
  .hero-badge { font-size: 0.9rem; }

  /* 区块标题与正文（section-title 有 nowrap，上限只到 4.8rem 防溢出） */
  .section-title { font-size: clamp(2.5rem, 5vw, 4.8rem); }
  .section-desc { font-size: 1.1rem; }
  .about-lead { font-size: 1.25rem; }
  .about-body { font-size: 1.02rem; }
  .about-text { max-width: 860px; }

  /* 卡片 */
  .business-card { padding: 36px 28px; }
  .business-card h3 { font-size: 1.15rem; }
  .business-card p { font-size: 0.9rem; }
  .eco-card p { font-size: 0.88rem; }
  .culture-card p { font-size: 0.98rem; }
  .future-block h3 { font-size: clamp(2rem, 3.5vw, 3.2rem); }
  .future-block p { font-size: 1rem; }

  /* 留白呼吸 */
  .quality-grid { gap: 80px; }
  .future-split { gap: 80px; }

  /* 装饰背景字 */
  .section-bg-text { font-size: 16rem; }

  /* 页脚（保持 min-height: 100vh，用内部间距消化高屏留白） */
  .footer .container { padding: 96px 40px; }
  .footer-quote { padding-bottom: 80px; margin-bottom: 80px; }
  .footer-quote-text { font-size: clamp(1.8rem, 4vw, 2.8rem); }
  .footer-grid { gap: 64px; margin-bottom: 72px; }
}

/* ===== 超宽屏 1920px+：终极放大 ===== */
@media (min-width: 1920px) {
  .container { max-width: 1728px; }

  /* Hero */
  .hero-content { max-width: 1100px; }
  .hero-logo { max-width: 880px; }
  .hero-subtitle { font-size: clamp(1.2rem, 2.5vw, 2rem); }
  .hero-desc { font-size: 1.2rem; }

  /* 标题与正文（5.5rem = 88px × 16字 ≈ 1408px < 内容宽 1648px，不溢出） */
  .section-title { font-size: clamp(2.5rem, 5vw, 5.5rem); }
  .section-desc { font-size: 1.15rem; }
  .about-lead { font-size: 1.3rem; }
  .about-body { font-size: 1.05rem; }
  .about-text { max-width: 920px; }

  /* 卡片 */
  .business-card { padding: 40px 32px; }
  .business-card h3 { font-size: 1.2rem; }
  .business-card p { font-size: 0.95rem; }
  .eco-card p { font-size: 0.92rem; }
  .culture-card p { font-size: 1.02rem; }
  .future-block h3 { font-size: clamp(2rem, 3.5vw, 3.5rem); }
  .future-block p { font-size: 1.05rem; }

  /* 留白呼吸 */
  .quality-grid { gap: 100px; }
  .future-split { gap: 100px; }

  /* 装饰背景字 */
  .section-bg-text { font-size: 18rem; }

  /* 页脚 */
  .footer .container { padding: 112px 40px; }
  .footer-quote { padding-bottom: 96px; margin-bottom: 96px; }
  .footer-quote-text { font-size: clamp(1.8rem, 4vw, 3.2rem); }
  .footer-grid { gap: 80px; margin-bottom: 88px; }
}

/* ===== 超宽屏 2560px+：超大屏专属 ===== */
@media (min-width: 2560px) {
  .container { max-width: 1920px; }

  /* Hero */
  .hero-content { max-width: 1240px; }
  .hero-logo { max-width: 1000px; }
  .hero-subtitle { font-size: clamp(1.2rem, 2.5vw, 2.2rem); }
  .hero-desc { font-size: 1.3rem; }

  /* 标题与正文（6.5rem = 104px × 16字 ≈ 1664px < 内容宽 1840px，不溢出） */
  .section-title { font-size: clamp(2.5rem, 5vw, 6.5rem); }
  .section-desc { font-size: 1.25rem; }
  .about-lead { font-size: 1.4rem; }
  .about-body { font-size: 1.12rem; }
  .about-text { max-width: 1000px; }

  /* 卡片 */
  .business-card { padding: 44px 36px; }
  .business-card h3 { font-size: 1.3rem; }
  .business-card p { font-size: 1rem; }
  .eco-card p { font-size: 0.98rem; }
  .culture-card p { font-size: 1.1rem; }
  .future-block h3 { font-size: clamp(2rem, 3.5vw, 4rem); }
  .future-block p { font-size: 1.12rem; }

  /* 留白呼吸 */
  .quality-grid { gap: 120px; }
  .future-split { gap: 120px; }

  /* 装饰背景字 */
  .section-bg-text { font-size: 20rem; }

  /* 页脚 */
  .footer .container { padding: 128px 40px; }
  .footer-quote { padding-bottom: 112px; margin-bottom: 112px; }
  .footer-quote-text { font-size: clamp(1.8rem, 4vw, 3.6rem); }
  .footer-grid { gap: 96px; margin-bottom: 104px; }
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .container { padding: 0 24px; }
  .business-grid { grid-template-columns: repeat(2, 1fr); }
  .ecosystem-grid { grid-template-columns: repeat(2, 1fr); }
  .quality-grid { grid-template-columns: 1fr; gap: 40px; }
  .quality-main { padding: 60px; aspect-ratio: auto; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .about-stats { grid-template-columns: repeat(2, 1fr); }
  .section-bg-text { font-size: 8rem; right: -30px; }

  /* 导航 — 汉堡菜单 */
  .nav-links {
    position: fixed;
    inset: 0;
    z-index: 999;
    width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
    gap: 0;
    padding: calc(var(--nav-height) + 16px) 0 40px;
    background: rgba(28, 25, 23, 0.97);
    backdrop-filter: blur(40px);
    -webkit-backdrop-filter: blur(40px);
    overflow-y: auto;
    overscroll-behavior: contain;
    opacity: 0;
    pointer-events: none;
  }
  .nav-links.active { opacity: 1; pointer-events: auto; }
  .nav-links.active ~ .nav-toggle span { background: #fff; }
  .nav-links li {
    display: flex;
    flex-shrink: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }
  .nav-links .nav-link {
    font-size: clamp(1.25rem, 5vw, 2rem);
    font-weight: 600;
    font-family: var(--font-heading);
    color: #fff;
    padding: clamp(14px, 2.5vw, 22px) 40px;
    width: 100%;
    text-align: left;
    letter-spacing: 0.04em;
  }
  .nav-links .nav-link:active {
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-gold-light);
  }
  .nav-links .nav-cta {
    margin: 20px 40px !important;
    padding: 12px 28px !important;
    font-size: clamp(0.95rem, 3vw, 1.15rem) !important;
    font-weight: 600 !important;
    text-align: center !important;
    border-radius: 50px !important;
    background: var(--color-accent) !important;
    color: #fff !important;
    white-space: nowrap;
    width: auto;
  }
  .nav.scrolled .nav-links {
    background: var(--color-background);
    backdrop-filter: blur(40px);
    -webkit-backdrop-filter: blur(40px);
  }
  .nav.scrolled .nav-links li {
    border-bottom-color: var(--color-border);
  }
  .nav.scrolled .nav-links .nav-link {
    color: var(--color-primary);
  }
  .nav.scrolled .nav-links .nav-link:active {
    background: var(--color-muted);
    color: var(--color-accent);
  }
  .nav.scrolled .nav-links.active ~ .nav-toggle span {
    background: var(--color-primary);
  }
  .nav-toggle { display: flex; }
  .nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
  .nav-toggle.active span:nth-child(2) { opacity: 0; }
  .nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }
}

@media (max-width: 768px) {
  .section { padding: var(--nav-height) 0 60px; }
  .section-title { font-size: 2.5rem; white-space: normal; }
  .business-grid { grid-template-columns: 1fr; }
  .ecosystem-grid { grid-template-columns: 1fr 1fr; }
  .culture-grid { grid-template-columns: 1fr; }
  .future-split { grid-template-columns: 1fr; gap: 40px; }
  .eco-highlight { flex-direction: column; text-align: center; padding: 32px 24px; }
  .hero-cta { flex-direction: column; align-items: center; }
  .about-stats { grid-template-columns: 1fr; }
  .quality-details { grid-template-columns: 1fr; }
  .quality-item:last-child { max-width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .section-bg-text { display: none; }
  .nav { padding: 0 24px; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .nav { padding: 0 16px; }
  .nav-logo { font-size: 1.05rem; gap: 8px; }
  .logo-icon { width: 30px; height: 30px; }
  .nav-toggle { padding: 6px; }
  .nav-toggle span { width: 20px; height: 1.5px; }
  .ecosystem-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: 2.2rem; }
  .hero-subtitle { font-size: 1rem; }
  .hero-desc { font-size: 0.9rem; }
  .section-title { font-size: 2rem; }
  .section-title-en { font-size: 1rem; }
  .stat-number-wrap .stat-number { font-size: 1.8rem; }
  .stat-number-wrap .stat-label { font-size: 0.85rem; }
  .quality-radial .quality-number { font-size: 2rem; }
  .eco-highlight h3 { font-size: 1.5rem; }
  .card-shine { display: none; }
  .glass-card { padding: 24px 20px; }
}