/* =====================================================
   兰州同成科技有限公司 — “西北科创・丝路新程”主题样式
   2025 企业官网重构 · 视觉：丝路文化 x 现代科技
   ===================================================== */

:root {
  /* 品牌色系 */
  --color-gold: #D4AF37;
  --color-gold-soft: #F7E7B7;
  --color-gold-deep: #A87F1F;
  --color-gobi: #8B4513;
  --color-gobi-light: #C47C37;
  --color-tech: #5B5FEF;
  --color-tech-dark: #2E1F55;
  --color-oasis: #2BB4A0;
  --color-sand: #B38755;
  --color-night: #05060D;
  --color-night-soft: #0F111E;
  --color-ink: #1A1F32;
  --color-ink-soft: #222740;
  --color-glow: rgba(212, 175, 55, 0.25);

  /* 中性色 */
  --text-primary: #F8F5EB;
  --text-secondary: rgba(248, 245, 235, 0.78);
  --text-muted: rgba(248, 245, 235, 0.58);
  --text-dark: #0F111E;

  --border-color: rgba(247, 237, 205, 0.18);
  --border-strong: rgba(247, 237, 205, 0.35);

  --bg-primary: rgba(15, 17, 34, 0.95);
  --bg-secondary: rgba(20, 24, 44, 0.85);
  --bg-tertiary: rgba(28, 33, 55, 0.8);
  --bg-highlight: rgba(91, 95, 239, 0.12);

  /* 字体 */
  --font-heading: 'Alibaba PuHuiTi 2.0', 'HarmonyOS Sans', 'Microsoft YaHei', 'PingFang SC', sans-serif;
  --font-body: 'HarmonyOS Sans', 'Microsoft YaHei', 'PingFang SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Menlo', monospace;

  /* 字号 */
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.25rem;
  --fs-2xl: 1.5rem;
  --fs-3xl: 1.875rem;
  --fs-4xl: 2.5rem;
  --fs-5xl: clamp(2.8rem, 4vw, 3.8rem);

  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;
  --radius-pill: 999px;

  /* 阴影 */
  --shadow-soft: 0 20px 45px rgba(0, 0, 0, 0.35);
  --shadow-card: 0 12px 30px rgba(5, 6, 13, 0.65);
  --shadow-hover: 0 35px 60px rgba(0, 0, 0, 0.45);

  /* 渐变 */
  --gradient-hero: linear-gradient(125deg, rgba(5, 6, 13, 0.98) 0%, rgba(46, 29, 71, 0.95) 45%, rgba(139, 69, 19, 0.9) 100%);
  --gradient-card: linear-gradient(140deg, rgba(18, 21, 37, 0.95), rgba(32, 38, 63, 0.92));
  --gradient-line: linear-gradient(90deg, rgba(91, 95, 239, 0.1), rgba(212, 175, 55, 0.65), rgba(91, 95, 239, 0.1));
  --gradient-sand: radial-gradient(circle at 20% 20%, rgba(212, 175, 55, 0.25), transparent 55%);

  /* 间距 */
  --space-xs: 0.35rem;
  --space-sm: 0.75rem;
  --space-md: 1.25rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4.5rem;
  --space-3xl: 6rem;

  /* 宽度 */
  --max-width-lg: 1200px;
  --max-width-xl: 1400px;
  --max-width-xxl: 1600px;

  /* 动画 */
  --transition-fast: 160ms ease;
  --transition-base: 280ms ease;
  --transition-slow: 420ms ease;
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: var(--fs-base);
  color: var(--text-primary);
  background: var(--color-night);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at 70% 20%, rgba(91, 95, 239, 0.2), transparent 55%);
  pointer-events: none;
  z-index: -1;
}

main {
  width: 100%;
  overflow: hidden;
}

img {
  max-width: 100%;
  display: block;
  border-radius: var(--radius-md);
}

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

a:hover {
  color: var(--color-gold-soft);
}

p {
  margin-bottom: var(--space-md);
  color: var(--text-secondary);
}

ul, ol {
  margin: 0 0 var(--space-md) var(--space-lg);
  color: var(--text-secondary);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 var(--space-sm);
  color: var(--text-primary);
}

h1 { font-size: var(--fs-5xl); }
h2 { font-size: var(--fs-4xl); }
h3 { font-size: var(--fs-3xl); }
h4 { font-size: var(--fs-2xl); }
h5 { font-size: var(--fs-xl); }
h6 { font-size: var(--fs-lg); }

/* ========= Buttons ========= */
button, .btn {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  padding: 0.9rem 1.8rem;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-primary {
  background: linear-gradient(120deg, var(--color-gold), var(--color-gobi-light));
  color: var(--text-dark);
  border-color: transparent;
  box-shadow: var(--shadow-card);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.btn-secondary {
  background: linear-gradient(120deg, var(--color-tech), #7C6BFF);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border-color: rgba(248, 245, 235, 0.35);
}

.btn-ghost:hover {
  border-color: var(--color-gold);
  color: var(--color-gold);
}

.btn-large {
  padding: 1.1rem 2.8rem;
  font-size: var(--fs-lg);
}

.btn-small {
  padding: 0.6rem 1.2rem;
  font-size: var(--fs-sm);
}

/* ========= Layout ========= */
.container {
  width: 100%;
  max-width: var(--max-width-xl);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container-wide {
  max-width: var(--max-width-xxl);
}

.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.flex {
  display: flex;
}

.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

/* ========= Utilities ========= */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-gold { color: var(--color-gold); }

.bg-panel { background: var(--bg-primary); border: 1px solid var(--border-color); }
.bg-highlight { background: var(--bg-highlight); }

.rounded { border-radius: var(--radius-lg); }
.shadow { box-shadow: var(--shadow-card); }

.m-0 { margin: 0; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.py-xl { padding-top: var(--space-xl); padding-bottom: var(--space-xl); }
.py-2xl { padding-top: var(--space-2xl); padding-bottom: var(--space-2xl); }
.py-3xl { padding-top: var(--space-3xl); padding-bottom: var(--space-3xl); }

/* ========= Header & Navigation ========= */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(24px);
  background: rgba(5, 6, 13, 0.75);
  border-bottom: 1px solid rgba(247, 237, 205, 0.1);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width-xxl);
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: var(--fs-xl);
  color: var(--text-primary);
  font-weight: 600;
}

.navbar-brand span {
  background: linear-gradient(120deg, var(--color-gold), var(--color-tech));
  -webkit-background-clip: text;
  color: transparent;
}

.navbar-menu {
  list-style: none;
  display: flex;
  margin: 0;
  padding: 0;
  gap: 0.25rem;
}

.navbar-item {
  position: relative;
}

.navbar-link {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.9rem 1.25rem;
  color: var(--text-secondary);
  border-radius: var(--radius-pill);
  transition: all var(--transition-fast);
}

.navbar-link:hover {
  color: var(--text-primary);
  background: rgba(91, 95, 239, 0.2);
}

.navbar-link::after {
  content: '';
  position: absolute;
  left: 1.2rem;
  right: 1.2rem;
  bottom: 0.4rem;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-gold), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.navbar-link:hover::after {
  opacity: 1;
}

.navbar-submenu {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  list-style: none;
  padding: var(--space-sm);
  margin: 0;
  min-width: 220px;
  background: rgba(10, 12, 22, 0.95);
  border: 1px solid rgba(247, 237, 205, 0.1);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-base);
}

.navbar-item:hover > .navbar-submenu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.navbar-submenu-item,
.navbar-submenu > li {
  width: 100%;
}

.navbar-submenu-link,
.navbar-submenu > li > a {
  display: block;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
}

.navbar-submenu-link:hover,
.navbar-submenu > li > a:hover {
  background: rgba(247, 237, 205, 0.08);
  color: var(--color-gold);
}

.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  border: none;
  background: transparent;
}

.navbar-toggle span {
  width: 26px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 999px;
}

/* ========= Sections & Hero ========= */
section {
  padding: var(--space-3xl) 0;
  position: relative;
}

section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.012), rgba(5, 6, 13, 0));
  opacity: 0.6;
  pointer-events: none;
}

section.light {
  background: rgba(255, 255, 255, 0.02);
}

section.dark {
  background: rgba(4, 5, 9, 0.95);
}

section.dark * {
  color: var(--text-secondary);
}

section .container { position: relative; z-index: 2; }

.section-title {
  font-size: var(--fs-3xl);
  margin-bottom: var(--space-sm);
}

.subheading {
  text-transform: uppercase;
  letter-spacing: 0.3em;
  color: var(--text-muted);
  font-size: var(--fs-xs);
  margin-bottom: var(--space-sm);
}

.section-desc {
  max-width: 760px;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
}

.hero {
  padding: var(--space-3xl) 0 var(--space-2xl);
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: url('../images/DwFg9tg3jKgT.gif') center/cover;
  opacity: 0.12;
  mix-blend-mode: screen;
}

.hero-silk {
  min-height: 90vh;
  display: flex;
  align-items: center;
  position: relative;
}

.hero-silk::before,
.hero-silk::after {
  content: '';
  position: absolute;
  inset: 10%;
  background: linear-gradient(120deg, rgba(212, 175, 55, 0.2), rgba(91, 95, 239, 0.15));
  filter: blur(45px);
  opacity: 0.5;
  border-radius: 45% 55% 60% 40%;
  animation: silkFloat 18s ease-in-out infinite;
  pointer-events: none;
}

.hero-silk::after {
  inset: 0 25% 0 -10%;
  background: radial-gradient(circle at 20% 50%, rgba(247, 237, 205, 0.15), transparent 65%);
  animation-duration: 24s;
  mix-blend-mode: screen;
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
  align-items: center;
}

.hero-story {
  position: relative;
  padding-left: 1rem;
  border-left: 3px solid rgba(247, 237, 205, 0.4);
}

.hero-story h1 {
  margin-bottom: var(--space-md);
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin: var(--space-lg) 0;
}

.hero-controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  align-items: center;
}

.sound-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.5rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(247, 237, 205, 0.3);
  background: rgba(5, 6, 13, 0.35);
  color: var(--text-primary);
  cursor: pointer;
  transition: border var(--transition-fast), transform var(--transition-fast);
}

.sound-toggle.active {
  border-color: var(--color-gold);
  transform: translateY(-2px);
}

.language-switch {
  display: inline-flex;
  background: rgba(15, 17, 34, 0.8);
  border-radius: var(--radius-pill);
  border: 1px solid rgba(247, 237, 205, 0.2);
  padding: 0.2rem;
}

.language-switch button {
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: var(--fs-sm);
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-pill);
  cursor: pointer;
}

.language-switch button.active {
  background: linear-gradient(120deg, var(--color-gold), var(--color-gobi-light));
  color: var(--text-dark);
}

.badge {
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(247, 237, 205, 0.25);
  font-size: var(--fs-sm);
  color: var(--text-secondary);
}

.hero-visual {
  position: relative;
  background: var(--gradient-card);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  box-shadow: var(--shadow-card);
}

.hero-visual::before,
.hero-visual::after {
  content: '';
  position: absolute;
  border-radius: var(--radius-xl);
  inset: 12px;
  border: 1px solid rgba(247, 237, 205, 0.15);
}

.hero-visual img {
  width: 100%;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(247, 237, 205, 0.25);
}

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

/* ========= Star Navigation ========= */
.constellation-nav {
  margin-top: var(--space-2xl);
}

.star-field {
  position: relative;
  border-radius: var(--radius-xl);
  border: 1px solid rgba(247, 237, 205, 0.15);
  background: radial-gradient(circle at 30% 30%, rgba(91, 95, 239, 0.2), transparent 65%), rgba(5, 6, 13, 0.85);
  min-height: 320px;
  overflow: hidden;
  padding: var(--space-xl);
}

.star-field::after {
  content: '';
  position: absolute;
  inset: 0;
  background: url('../images/nsSp8rN2ZSe6.png') center/cover;
  opacity: 0.15;
  mix-blend-mode: screen;
}

.star-node {
  position: absolute;
  left: var(--x, 50%);
  top: var(--y, 50%);
  transform: translate(-50%, -50%);
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-gold);
  box-shadow: 0 0 20px rgba(212, 175, 55, 0.9);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  border: none;
  padding: 0;
}

.star-node::after {
  content: attr(data-label);
  position: absolute;
  top: -30px;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-pill);
  background: rgba(5, 6, 13, 0.9);
  border: 1px solid rgba(247, 237, 205, 0.3);
  font-size: var(--fs-xs);
  white-space: nowrap;
  opacity: 0;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.star-node:hover {
  transform: translate(-50%, -50%) scale(1.2);
  box-shadow: 0 0 30px rgba(212, 175, 55, 1);
}

.star-node:hover::after {
  opacity: 1;
  transform: translate(-50%, -10px);
}

.star-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-top: var(--space-lg);
  color: var(--text-muted);
  font-size: var(--fs-sm);
}

.star-legend span {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.star-legend i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-gold);
  box-shadow: 0 0 12px rgba(212, 175, 55, 0.7);
}

.page-hero {
  background: linear-gradient(135deg, rgba(5, 6, 13, 0.9), rgba(32, 25, 55, 0.95));
  padding: var(--space-2xl) 0;
  margin-bottom: var(--space-xl);
  border-bottom: 1px solid rgba(247, 237, 205, 0.12);
}

.page-hero .breadcrumbs {
  display: flex;
  gap: 0.5rem;
  font-size: var(--fs-sm);
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

/* ========= Cards & Modules ========= */
.card {
  background: var(--gradient-card);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-base), border-color var(--transition-base);
}

.card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1px solid transparent;
  transition: border-color var(--transition-base);
}

.card:hover {
  transform: translateY(-6px);
}

.card:hover::after {
  border-color: rgba(247, 237, 205, 0.3);
}

/* ========= Scroll Panels ========= */
.scroll-panel {
  position: relative;
  border-radius: var(--radius-xl);
  border: 1px solid rgba(247, 237, 205, 0.15);
  background: linear-gradient(135deg, rgba(15, 17, 34, 0.95), rgba(43, 28, 5, 0.7));
  padding: var(--space-xl);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.scroll-panel::before,
.scroll-panel::after {
  content: '';
  position: absolute;
  width: 140px;
  height: 140%;
  top: -20%;
  border-radius: 999px;
  border: 1px solid rgba(247, 237, 205, 0.25);
  background: rgba(247, 237, 205, 0.05);
  filter: blur(2px);
}

.scroll-panel::before { left: -80px; }
.scroll-panel::after { right: -80px; }

.scroll-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.scroll-step {
  border: 1px solid rgba(247, 237, 205, 0.2);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  background: rgba(5, 6, 13, 0.45);
  position: relative;
}

.scroll-step::before {
  content: attr(data-year);
  position: absolute;
  top: -14px;
  left: 1rem;
  padding: 0.15rem 0.6rem;
  border-radius: var(--radius-pill);
  background: rgba(212, 175, 55, 0.18);
  border: 1px solid rgba(212, 175, 55, 0.35);
  font-size: var(--fs-xs);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-md);
}

.card-body {
  margin-bottom: var(--space-md);
}

.card-footer {
  padding-top: var(--space-sm);
  border-top: 1px solid rgba(247, 237, 205, 0.12);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-md);
}

.stat-card {
  padding: var(--space-md);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(247, 237, 205, 0.12);
}

.stat-card strong {
  display: block;
  font-size: var(--fs-3xl);
  color: var(--color-gold);
}

.counter {
  font-size: var(--fs-4xl);
  font-weight: 600;
  color: var(--color-gold);
}

.data-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-pill);
  background: rgba(91, 95, 239, 0.08);
  border: 1px solid rgba(91, 95, 239, 0.25);
  font-size: var(--fs-sm);
}

/* ========= Silk Road Map ========= */
.map-panel {
  position: relative;
  padding: var(--space-xl);
  border-radius: var(--radius-xl);
  background: radial-gradient(circle at 30% 20%, rgba(5, 6, 13, 0.85), rgba(29, 32, 55, 0.95));
  border: 1px solid rgba(247, 237, 205, 0.15);
  overflow: hidden;
}

.map-grid {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.3;
}

.map-route {
  position: relative;
  min-height: 320px;
}

.map-route img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  mix-blend-mode: screen;
  opacity: 0.65;
}

.route-line {
  position: absolute;
  inset: 20% 5%;
  border: 1.5px dashed rgba(247, 237, 205, 0.7);
  border-radius: 45px;
  animation: routeFlow 12s linear infinite;
}

.route-node {
  position: absolute;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-gold);
  box-shadow: 0 0 20px rgba(212, 175, 55, 0.7);
  animation: pulse 3s ease-in-out infinite;
}

.route-label {
  position: absolute;
  top: -26px;
  left: 50%;
  transform: translate(-50%, -6px);
  font-size: var(--fs-xs);
  color: var(--text-secondary);
  background: rgba(5, 6, 13, 0.9);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(247, 237, 205, 0.2);
  white-space: nowrap;
  opacity: 0;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  pointer-events: none;
}

.route-node:hover .route-label {
  opacity: 1;
  transform: translate(-50%, -12px);
}

.map-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

.map-legend span {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.map-legend i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-gold);
}

/* ========= Product Matrix ========= */
.product-matrix {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-md);
}

.product-card {
  position: relative;
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(247, 237, 205, 0.15);
  background: rgba(255, 255, 255, 0.02);
  overflow: hidden;
}

.product-card h4 {
  margin-bottom: var(--space-sm);
}

.product-card .tag {
  display: inline-flex;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-pill);
  background: rgba(91, 95, 239, 0.15);
  font-size: var(--fs-xs);
  color: var(--text-primary);
}

.product-card::before {
  content: '';
  position: absolute;
  inset: 1px;
  border-radius: inherit;
  border: 1px solid transparent;
  background: linear-gradient(120deg, rgba(212, 175, 55, 0.1), rgba(91, 95, 239, 0.1));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.product-card:hover::before {
  opacity: 1;
}

/* ========= Innovation Labs ========= */
.lab-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.lab-card {
  padding: var(--space-lg);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(247, 237, 205, 0.15);
  background: rgba(5, 6, 13, 0.65);
  backdrop-filter: blur(18px);
}

.lab-card h4 {
  margin-bottom: var(--space-sm);
}

.lab-meta {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

/* ========= Cooperation Network ========= */
.network-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-md);
}

.network-card {
  padding: var(--space-md);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(247, 237, 205, 0.12);
  background: rgba(255, 255, 255, 0.02);
}

.network-card strong {
  color: var(--color-gold);
  font-size: var(--fs-lg);
}

/* ========= Solutions ========= */
.solution-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-md);
}

.solution-card {
  border-radius: var(--radius-lg);
  border: 1px solid rgba(247, 237, 205, 0.12);
  padding: var(--space-lg);
  background: rgba(28, 33, 55, 0.85);
}

.solution-card h4 {
  margin-bottom: var(--space-sm);
}

.solution-card ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.solution-card li {
  padding-left: 1.5rem;
  position: relative;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

.solution-card li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-gold);
}

/* ========= Oasis Advantage ========= */
.oasis-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-md);
}

.oasis-card {
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  border: 1px solid rgba(247, 237, 205, 0.2);
  background: rgba(5, 6, 13, 0.5);
  position: relative;
}

.oasis-card::after {
  content: '';
  position: absolute;
  inset: 12px;
  border-radius: var(--radius-md);
  border: 1px dashed rgba(247, 237, 205, 0.2);
  opacity: 0.5;
  pointer-events: none;
}

.resource-chart {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  border: 6px solid rgba(247, 237, 205, 0.3);
  margin: 0 auto var(--space-md);
  position: relative;
  background: conic-gradient(var(--color-gold) 0 35%, var(--color-oasis) 35% 62%, rgba(91, 95, 239, 0.5) 62% 100%);
}

.resource-chart span {
  position: absolute;
  inset: 12px;
  border-radius: 50%;
  background: rgba(5, 6, 13, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-xl);
  color: var(--color-gold);
}

.advantage-data {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.advantage-data li {
  list-style: none;
  padding-left: 0;
  border-bottom: 1px solid rgba(247, 237, 205, 0.12);
  padding-bottom: 0.35rem;
  margin-bottom: 0.35rem;
  color: var(--text-secondary);
}

/* ========= Culture ========= */
.culture-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-md);
}

.culture-card {
  padding: var(--space-md);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(247, 237, 205, 0.15);
}

.culture-card h5 {
  margin-bottom: 0.4rem;
}

/* ========= VR Experience ========= */
.vr-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-md);
}

.vr-card {
  border-radius: var(--radius-lg);
  border: 1px solid rgba(247, 237, 205, 0.12);
  padding: var(--space-md);
  background: rgba(5, 6, 13, 0.55);
}

.vr-preview {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(247, 237, 205, 0.2);
  margin-bottom: var(--space-md);
  position: relative;
}

.vr-preview::after {
  content: 'VR';
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  padding: 0.15rem 0.6rem;
  border-radius: var(--radius-pill);
  background: rgba(5, 6, 13, 0.8);
  border: 1px solid rgba(247, 237, 205, 0.3);
  font-size: var(--fs-xs);
}

.vr-preview img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

/* ========= Crowdfunding ========= */
.crowdfunding-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-md);
}

.crowdfunding-card {
  border-radius: var(--radius-lg);
  border: 1px solid rgba(247, 237, 205, 0.12);
  background: rgba(5, 6, 13, 0.6);
  padding: var(--space-md);
}

.crowdfunding-card h4 {
  margin-bottom: var(--space-sm);
}

.progress-bar {
  width: 100%;
  height: 8px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
  margin: var(--space-sm) 0;
}

.progress-fill {
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(120deg, var(--color-gold), var(--color-oasis));
  width: 0;
}

.crowdfunding-meta {
  display: flex;
  justify-content: space-between;
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

/* ========= News & Cases ========= */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
}

.news-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(247, 237, 205, 0.1);
  background: rgba(5, 6, 13, 0.65);
}

.news-card img {
  height: 180px;
  width: 100%;
  object-fit: cover;
  border-radius: 0;
}

.news-card .news-body {
  padding: var(--space-md);
}

.news-meta {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  display: flex;
  gap: 0.75rem;
}

/* ========= Timeline ========= */
.timeline {
  display: grid;
  gap: var(--space-lg);
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, rgba(247, 237, 205, 0), rgba(247, 237, 205, 0.6));
}

.timeline-item {
  padding-left: 2.5rem;
  position: relative;
}

.timeline-item::before {
  content: attr(data-year);
  position: absolute;
  left: 0;
  top: 0;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-pill);
  background: rgba(247, 237, 205, 0.08);
  font-size: var(--fs-xs);
}

/* ========= Tabs ========= */
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.tabs button {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid rgba(247, 237, 205, 0.2);
  border-radius: var(--radius-pill);
  padding: 0.5rem 1.4rem;
  cursor: pointer;
}

.tabs button.active {
  color: var(--text-dark);
  background: linear-gradient(120deg, var(--color-gold), var(--color-gobi-light));
  border-color: transparent;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

/* ========= Modal ========= */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(5, 6, 13, 0.8);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  padding: var(--space-lg);
}

.modal.active {
  display: flex;
}

.modal-content {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(247, 237, 205, 0.2);
  padding: var(--space-lg);
  max-width: 560px;
  width: 100%;
  box-shadow: var(--shadow-card);
}

.modal-close {
  position: absolute;
  top: 1.2rem;
  right: 1.2rem;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: var(--fs-xl);
  cursor: pointer;
}

/* ========= Forms ========= */
form {
  display: grid;
  gap: var(--space-md);
}

input, textarea, select {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(247, 237, 205, 0.25);
  border-radius: var(--radius-md);
  padding: 0.85rem 1rem;
  color: var(--text-primary);
  font-family: var(--font-body);
}

textarea {
  min-height: 140px;
  resize: vertical;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-lg);
}

.contact-card {
  padding: var(--space-lg);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(247, 237, 205, 0.15);
  background: rgba(5, 6, 13, 0.65);
}

.cta-panel {
  padding: var(--space-xl);
  border-radius: var(--radius-xl);
  background: linear-gradient(120deg, rgba(212, 175, 55, 0.25), rgba(91, 95, 239, 0.35));
  border: 1px solid rgba(247, 237, 205, 0.2);
  box-shadow: var(--shadow-card);
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-gold);
}

/* ========= Footer ========= */
footer {
  background: #040509;
  padding: var(--space-2xl) 0 var(--space-xl);
  border-top: 1px solid rgba(247, 237, 205, 0.08);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.footer-section h4 {
  margin-bottom: var(--space-sm);
}

.footer-section ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-section li {
  margin-bottom: 0.4rem;
  color: var(--text-muted);
}

.footer-section a {
  color: var(--text-secondary);
}

.footer-bottom {
  text-align: center;
  color: var(--text-muted);
  font-size: var(--fs-sm);
}

/* ========= Sandstorm Overlay ========= */
#sandstorm-overlay {
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at 30% 30%, rgba(212, 175, 55, 0.25), transparent 60%), rgba(5, 4, 2, 0.85);
  mix-blend-mode: screen;
  opacity: 0;
  pointer-events: none;
  z-index: 2500;
  transition: opacity 0.45s ease;
}

#sandstorm-overlay.active {
  opacity: 1;
  animation: sandstorm 0.6s ease forwards;
}

/* ========= Animations ========= */
@keyframes routeFlow {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes pulse {
  0%, 100% { transform: scale(0.95); opacity: 0.6; }
  50% { transform: scale(1.2); opacity: 1; }
}

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

@keyframes silkFloat {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(5%, -3%, 0) scale(1.05); }
}

@keyframes sandstorm {
  0% { opacity: 0; filter: blur(0px); }
  30% { opacity: 1; filter: blur(2px); }
  100% { opacity: 0; filter: blur(8px); }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s ease;
}

.animate-on-scroll.animated {
  opacity: 1;
  transform: translateY(0);
}

/* ========= Responsive ========= */
@media (max-width: 1200px) {
  .navbar-menu {
    gap: 0.5rem;
  }
}

@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-md);
  }

  .navbar {
    flex-wrap: wrap;
  }

  .navbar-toggle {
    display: flex;
  }

  .navbar-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(5, 6, 13, 0.95);
    padding: var(--space-md);
    border-bottom: 1px solid rgba(247, 237, 205, 0.1);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
  }

  .navbar-menu.active {
    max-height: 600px;
  }

  .navbar-link {
    width: 100%;
    justify-content: space-between;
    border-radius: var(--radius-md);
  }

  .navbar-submenu {
    position: relative;
    top: 0;
    opacity: 1;
    visibility: visible;
    transform: none;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
    width: 100%;
    margin-top: 0.5rem;
  }

  .navbar-submenu.active {
    max-height: 500px;
  }

  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }

  section {
    padding: var(--space-2xl) 0;
  }
}

@media (max-width: 480px) {
  h1 { font-size: 2.2rem; }
  h2 { font-size: 1.8rem; }
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  .btn, .btn-large {
    width: 100%;
    justify-content: center;
  }
}