/* ========== Reset & Base ========== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
:root {
  --bg-dark: #060a14;
  --bg-card: #0d1525;
  --bg-card-hover: #131d35;
  --text-primary: #f0f2f5;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  --accent-app: #e040a0;
  --accent-trade: #00d4ff;
  --accent-train: #d4a843;
  --accent-app-glow: rgba(224, 64, 160, 0.15);
  --accent-trade-glow: rgba(0, 212, 255, 0.15);
  --accent-train-glow: rgba(212, 168, 67, 0.15);
  --radius: 12px;
  --radius-lg: 20px;
  --nav-h: 72px;
}
html {
  scroll-behavior: smooth;
  font-size: 16px;
}
body {
  font-family:
    "Noto Sans SC",
    system-ui,
    -apple-system,
    sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}
a {
  color: inherit;
  text-decoration: none;
}
img {
  max-width: 100%;
  display: block;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ========== Scroll Animations ========== */
.fade-up {
  opacity: 0;
  transform: translateY(40px);
  transition:
    opacity 0.7s ease,
    transform 0.7s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========== Navigation ========== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  z-index: 1000;
  transition:
    background 0.3s,
    box-shadow 0.3s;
}
.nav.scrolled {
  background: rgba(6, 10, 20, 0.95);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.nav-logo {
  font-size: 1.4rem;
  font-weight: 900;
  letter-spacing: 1px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-logo .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(
    135deg,
    var(--accent-app),
    var(--accent-trade)
  );
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
}
.nav-links li {
  position: relative;
}
.nav-links a {
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  transition:
    background 0.2s,
    color 0.2s;
  color: var(--text-secondary);
}
.nav-links a:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
}
/* Dropdown */
.has-dropdown {
  cursor: pointer;
}
.has-dropdown > a::after {
  content: "";
  display: inline-block;
  width: 0;
  height: 0;
  margin-left: 5px;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid currentColor;
  vertical-align: middle;
}
.dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  min-width: 180px;
  background: rgba(17, 24, 39, 0.97);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  padding: 6px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s;
}
.has-dropdown:hover .dropdown {
  opacity: 1;
  visibility: visible;
}
.dropdown a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 0.85rem;
  white-space: nowrap;
}
.dropdown a .dd-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}
.nav-cta {
  padding: 8px 20px !important;
  background: linear-gradient(
    135deg,
    var(--accent-app),
    #c0308a
  ) !important;
  color: #fff !important;
  border-radius: 8px;
  font-weight: 600;
}
.nav-cta:hover {
  opacity: 0.9;
}
/* Mobile overlay (outside nav, own stacking context) */
.mobile-menu {
  display: none; /* hidden on desktop */
}
/* Mobile menu */
.menu-toggle {
  display: none;
  position: fixed;
  top: calc((var(--nav-h) - 40px) / 2);
  right: 24px;
  z-index: 1100;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}
.menu-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
  transform-origin: center;
}
/* Hamburger → X animation */
.menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.menu-toggle.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.menu-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
/* Body scroll lock */
body.menu-open {
  overflow: hidden;
}
/* Dropdown toggle button (mobile only) */
.dropdown-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 8px;
  border-radius: 6px;
  transition: background 0.2s;
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
}
.dropdown-toggle:hover {
  background: rgba(255, 255, 255, 0.06);
}
.dropdown-toggle svg {
  transition: transform 0.3s ease;
}
.has-dropdown.open .dropdown-toggle svg {
  transform: rotate(180deg);
}

/* ========== Hero ========== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--nav-h) + 40px) 24px 80px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(
      ellipse at 30% 20%,
      rgba(224, 64, 160, 0.08) 0%,
      transparent 50%
    ),
    radial-gradient(
      ellipse at 70% 80%,
      rgba(0, 212, 255, 0.08) 0%,
      transparent 50%
    ),
    radial-gradient(
      ellipse at 50% 50%,
      rgba(212, 168, 67, 0.05) 0%,
      transparent 60%
    );
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 100px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
}
.hero-badge .pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-train);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.4;
  }
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #fff 0%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.8;
}
.hero-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all 0.25s;
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent-app), #c0308a);
  color: #fff;
  box-shadow: 0 4px 24px rgba(224, 64, 160, 0.25);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(224, 64, 160, 0.35);
}
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.15);
}
.btn-outline:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.25);
}
/* Ecosystem flow */
.eco-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 56px;
  flex-wrap: wrap;
}
.eco-node {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 10px;
  font-size: 0.85rem;
  font-weight: 500;
}
.eco-node.app {
  background: var(--accent-app-glow);
  color: var(--accent-app);
  border: 1px solid rgba(249, 115, 22, 0.2);
}
.eco-node.trade {
  background: var(--accent-trade-glow);
  color: var(--accent-trade);
  border: 1px solid rgba(59, 130, 246, 0.2);
}
.eco-node.train {
  background: var(--accent-train-glow);
  color: var(--accent-train);
  border: 1px solid rgba(16, 185, 129, 0.2);
}
.eco-arrow {
  color: var(--text-muted);
  font-size: 1.2rem;
}

/* ========== Section Common ========== */
section {
  padding: 100px 0;
}
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 12px;
}
.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}
.section-desc {
  color: var(--text-secondary);
  max-width: 560px;
  font-size: 1rem;
  line-height: 1.8;
}
.section-header {
  text-align: center;
  margin-bottom: 60px;
}
.section-header .section-desc {
  margin: 0 auto;
}

/* ========== Product Cards ========== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.product-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}
.product-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  opacity: 0;
  transition: opacity 0.3s;
}
.product-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.1);
  background: var(--bg-card-hover);
}
.product-card:hover::before {
  opacity: 1;
}
.product-card.app::before {
  background: linear-gradient(90deg, var(--accent-app), #f060b0);
}
.product-card.trade::before {
  background: linear-gradient(90deg, var(--accent-trade), #60e8ff);
}
.product-card.train::before {
  background: linear-gradient(90deg, var(--accent-train), #e8c060);
}
.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 20px;
}
.app .card-icon {
  background: var(--accent-app-glow);
  color: var(--accent-app);
}
.trade .card-icon {
  background: var(--accent-trade-glow);
  color: var(--accent-trade);
}
.train .card-icon {
  background: var(--accent-train-glow);
  color: var(--accent-train);
}
.card-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.card-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 20px;
}
.card-stats {
  display: flex;
  gap: 24px;
  margin-bottom: 24px;
}
.stat-item .stat-num {
  font-size: 1.3rem;
  font-weight: 800;
}
.stat-item .stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
}
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: gap 0.2s;
}
.card-link:hover {
  gap: 10px;
}
.app .card-link {
  color: var(--accent-app);
}
.trade .card-link {
  color: var(--accent-trade);
}
.train .card-link {
  color: var(--accent-train);
}

/* ========== Detail Sections ========== */
.detail-block {
  padding: 80px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}
.detail-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.detail-inner.reverse {
  direction: rtl;
}
.detail-inner.reverse > * {
  direction: ltr;
}
.detail-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 16px;
}
.detail-tag.app {
  background: var(--accent-app-glow);
  color: var(--accent-app);
}
.detail-tag.trade {
  background: var(--accent-trade-glow);
  color: var(--accent-trade);
}
.detail-tag.train {
  background: var(--accent-train-glow);
  color: var(--accent-train);
}
.detail-title {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}
.detail-desc {
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 28px;
}
.detail-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 32px;
}
.detail-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.detail-features li .check {
  width: 20px;
  height: 20px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 0.7rem;
  margin-top: 2px;
}
.app .check {
  background: var(--accent-app-glow);
  color: var(--accent-app);
}
.trade .check {
  background: var(--accent-trade-glow);
  color: var(--accent-trade);
}
.train .check {
  background: var(--accent-train-glow);
  color: var(--accent-train);
}
.detail-visual {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  padding: 40px;
  min-height: 340px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
/* Visual placeholders */
.visual-app-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  width: 100%;
}
.visual-app-grid .thumb {
  aspect-ratio: 9/16;
  border-radius: 8px;
  background: linear-gradient(
    135deg,
    rgba(224, 64, 160, 0.15),
    rgba(224, 64, 160, 0.05)
  );
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  color: var(--text-muted);
}
.visual-flow {
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
}
.flow-step {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  background: rgba(0, 212, 255, 0.06);
  border: 1px solid rgba(0, 212, 255, 0.1);
  border-radius: 10px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.flow-step .step-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent-trade-glow);
  color: var(--accent-trade);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
}
.flow-arrow {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
}
.visual-train-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  width: 100%;
}
.train-stat {
  background: rgba(212, 168, 67, 0.06);
  border: 1px solid rgba(212, 168, 67, 0.1);
  border-radius: 10px;
  padding: 20px;
  text-align: center;
}
.train-stat .ts-num {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--accent-train);
}
.train-stat .ts-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ========== Partners ========== */
.partners-section {
  background: rgba(255, 255, 255, 0.02);
}
.partner-categories {
  display: flex;
  flex-direction: column;
  gap: 48px;
}
.partner-group-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 20px;
  text-align: center;
}
.partner-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}
.partner-logo {
  width: 120px;
  height: 56px;
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  filter: grayscale(1);
  opacity: 0.5;
  transition: all 0.3s;
}
.partner-logo:hover {
  filter: grayscale(0);
  opacity: 1;
  border-color: rgba(255, 255, 255, 0.12);
}
/* Marquee */
.marquee-wrap {
  overflow: hidden;
  position: relative;
  padding: 12px 0;
}
.marquee-wrap::before,
.marquee-wrap::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 80px;
  z-index: 2;
}
.marquee-wrap::before {
  left: 0;
  background: linear-gradient(90deg, var(--bg-dark), transparent);
}
.marquee-wrap::after {
  right: 0;
  background: linear-gradient(270deg, var(--bg-dark), transparent);
}
.marquee-track {
  display: flex;
  gap: 32px;
  animation: marquee 30s linear infinite;
  width: max-content;
}
.marquee-track:hover {
  animation-play-state: paused;
}
@keyframes marquee {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}

/* ========== Bottom CTA ========== */
.cta-section {
  text-align: center;
  padding: 100px 0;
  position: relative;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse at center,
    rgba(224, 64, 160, 0.06) 0%,
    transparent 70%
  );
}
.cta-section .container {
  position: relative;
  z-index: 1;
}
.cta-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  margin-bottom: 16px;
}
.cta-desc {
  color: var(--text-secondary);
  margin-bottom: 36px;
  font-size: 1rem;
}
.cta-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ========== Footer ========== */
.footer {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 60px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand .footer-logo {
  font-size: 1.2rem;
  font-weight: 900;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.footer-brand p {
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.7;
  max-width: 280px;
}
.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}
.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color 0.2s;
}
.footer-col a:hover {
  color: var(--text-primary);
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ========== About Cards ========== */
.about-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 48px;
}
.about-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: border-color 0.3s;
}
.about-card:hover {
  border-color: rgba(255, 255, 255, 0.12);
}
.about-card__icon {
  font-size: 1.6rem;
  margin-bottom: 16px;
}
.about-card__title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text-primary);
}
.about-card__text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.9;
}

/* ========== WeChat FAB ========== */
.wechat-fab {
  position: fixed;
  right: 24px;
  bottom: 32px;
  z-index: 1090;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  background: #07c160;
  color: #fff;
  border: none;
  border-radius: 100px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(7, 193, 96, 0.35);
  transition: transform 0.25s, box-shadow 0.25s;
  font-family: inherit;
}
.wechat-fab:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(7, 193, 96, 0.45);
}
.wechat-fab svg {
  flex-shrink: 0;
}

/* ========== WeChat Modal ========== */
.wechat-modal {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}
.wechat-modal.open {
  opacity: 1;
  visibility: visible;
}
.wechat-modal__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
}
.wechat-modal__content {
  position: relative;
  background: #fff;
  border-radius: 16px;
  padding: 36px 32px 28px;
  text-align: center;
  max-width: 340px;
  width: 90%;
  transform: scale(0.9) translateY(20px);
  transition: transform 0.3s ease;
}
.wechat-modal.open .wechat-modal__content {
  transform: scale(1) translateY(0);
}
.wechat-modal__close {
  position: absolute;
  top: 12px;
  right: 14px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  font-size: 1.4rem;
  color: #999;
  cursor: pointer;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, color 0.2s;
  line-height: 1;
}
.wechat-modal__close:hover {
  background: #f0f0f0;
  color: #333;
}
.wechat-modal__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 20px;
}
.wechat-modal__qr {
  width: 220px;
  height: 220px;
  object-fit: contain;
  border-radius: 8px;
  margin: 0 auto;
}
.wechat-modal__hint {
  margin-top: 16px;
  font-size: 0.8rem;
  color: #999;
}
.wechat-modal__btn {
  display: inline-block;
  margin-top: 16px;
  padding: 10px 28px;
  background: #07c160;
  color: #fff;
  border-radius: 100px;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s, transform 0.2s;
}
.wechat-modal__btn:hover {
  background: #06ad56;
  transform: translateY(-1px);
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .products-grid {
    grid-template-columns: 1fr;
  }
  .detail-inner,
  .detail-inner.reverse {
    grid-template-columns: 1fr;
    direction: ltr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .about-cards {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 768px) {
  /* Hide desktop nav on mobile */
  .nav-links--desktop {
    display: none;
  }
  /* Mobile overlay — own stacking context, NOT inside .nav */
  .mobile-menu {
    display: block;
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1050;
    background: rgba(6, 10, 20, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    overflow-y: auto;
    /* Hidden by default */
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition:
      opacity 0.3s ease,
      visibility 0.3s ease,
      transform 0.3s ease;
  }
  .mobile-menu.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  /* Mobile menu list */
  .mobile-menu__links {
    list-style: none;
    padding: 16px 24px 32px;
    display: flex;
    flex-direction: column;
    gap: 0;
  }
  .mobile-menu__links li {
    position: relative;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }
  .mobile-menu__links li:last-child {
    border-bottom: none;
    margin-top: 8px;
  }
  .mobile-menu__links a {
    display: block;
    padding: 16px 4px;
    font-size: 1rem;
    color: var(--text-secondary);
    border-radius: 0;
    transition: color 0.2s;
  }
  .mobile-menu__links a:active {
    color: var(--text-primary);
  }
  /* Dropdown trigger link takes most of the width */
  .mobile-menu__links .has-dropdown {
    position: relative;
  }
  .mobile-menu__links .has-dropdown > .dropdown-trigger {
    padding-right: 44px;
  }
  .mobile-menu__links .has-dropdown > a::after {
    display: none;
  }
  /* Dropdown toggle button visible on mobile */
  .dropdown-toggle {
    display: flex;
  }
  /* Mobile dropdown: collapsible */
  .mobile-menu__links .dropdown {
    position: static;
    transform: none;
    background: rgba(255, 255, 255, 0.03);
    border: none;
    border-radius: 10px;
    margin: 0 0 8px 0;
    padding: 4px 8px;
    max-height: 0;
    overflow: hidden;
    opacity: 1;
    visibility: visible;
    transition: max-height 0.35s ease, padding 0.35s ease, margin 0.35s ease;
  }
  .mobile-menu__links .has-dropdown.open .dropdown {
    max-height: 300px;
    padding: 8px;
    margin: 4px 0 12px 0;
  }
  .mobile-menu__links .dropdown a {
    padding: 12px 14px;
    font-size: 0.9rem;
    border-radius: 8px;
  }
  .mobile-menu__links .dropdown a:active {
    background: rgba(255, 255, 255, 0.06);
  }
  /* CTA button full width on mobile */
  .mobile-menu__links .nav-cta {
    text-align: center;
    display: block;
    padding: 14px 20px !important;
    border-radius: 10px !important;
  }
  /* Hamburger always visible on mobile, above everything */
  .menu-toggle {
    display: flex;
    z-index: 1100;
  }
  /* WeChat FAB: hide text on mobile, smaller */
  .wechat-fab span {
    display: none;
  }
  .wechat-fab {
    padding: 14px;
    right: 16px;
    bottom: 24px;
  }
  .wechat-fab svg {
    width: 22px;
    height: 22px;
  }
  /* Hero adjustments */
  .hero h1 {
    font-size: 1.8rem;
  }
  .eco-flow {
    flex-direction: column;
  }
  .eco-arrow {
    transform: rotate(90deg);
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}