/* ===== 合乐电子 - 主样式 ===== */
:root {
  --primary: #0d6efd;
  --primary-dark: #0a58ca;
  --accent: #00d4ff;
  --dark: #0a0e17;
  --dark2: #111827;
  --dark3: #1a2332;
  --text: #e8edf5;
  --text2: #94a3b8;
  --card-bg: rgba(255,255,255,0.03);
  --card-border: rgba(255,255,255,0.06);
  --radius: 12px;
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
}

* { margin:0; padding:0; box-sizing:border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
  background: var(--dark);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== Navigation ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10,14,23,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  transition: var(--transition);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-size: 1.2rem;
  font-weight: 700;
}

.logo-icon {
  font-size: 1.5rem;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 8px;
  align-items: center;
}

.nav-menu a {
  text-decoration: none;
  color: var(--text2);
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.9rem;
  transition: var(--transition);
  position: relative;
}

.nav-menu a:hover, .nav-menu a.active {
  color: var(--text);
  background: rgba(255,255,255,0.06);
}

.lang-switch {
  font-weight: 600;
  color: var(--accent) !important;
  border: 1px solid rgba(0,212,255,0.3);
}

.lang-switch:hover {
  background: rgba(0,212,255,0.1) !important;
  border-color: var(--accent);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== Hero Section ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 80px 20px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(13,110,253,0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(0,212,255,0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(99,102,241,0.08) 0%, transparent 50%);
}

.particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #fff 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text2);
  margin-bottom: 40px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  gap: 8px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #4a6cf7);
  color: #fff;
  box-shadow: 0 4px 20px rgba(13,110,253,0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(13,110,253,0.4);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid rgba(255,255,255,0.2);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(0,212,255,0.06);
}

.btn-sm {
  padding: 10px 20px;
  font-size: 0.85rem;
}

.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  animation: bounce 2s infinite;
}

.scroll-indicator span {
  display: block;
  width: 20px;
  height: 20px;
  border-right: 2px solid var(--text2);
  border-bottom: 2px solid var(--text2);
  transform: rotate(45deg);
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(10px); }
}

/* ===== Sections ===== */
.section {
  padding: 100px 0;
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
}

.section-desc {
  text-align: center;
  color: var(--text2);
  max-width: 600px;
  margin: 0 auto 60px;
  font-size: 1.05rem;
}

.section:nth-child(even) {
  background: var(--dark2);
}

/* ===== About ===== */
.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
}

.about-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 32px;
  transition: var(--transition);
}

.about-card:hover {
  transform: translateY(-4px);
  border-color: rgba(13,110,253,0.3);
  box-shadow: 0 8px 40px rgba(0,0,0,0.3);
}

.about-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.about-card h3 {
  margin-bottom: 12px;
  font-size: 1.1rem;
}

.about-card p {
  color: var(--text2);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* ===== Products ===== */
.products {
  background: var(--dark2);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 20px;
}

.product-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 0;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  overflow: hidden;
}

.product-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0,212,255,0.3);
  box-shadow: 0 12px 40px rgba(0,0,0,0.4);
}

.product-img {
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-card h3 {
  padding: 16px 16px 4px;
  font-size: 1rem;
}

.product-card p {
  padding: 0 16px 16px;
  color: var(--text2);
  font-size: 0.8rem;
}

/* ===== Equipment ===== */
.eq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 16px;
}

.eq-item {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 24px 16px;
  text-align: center;
  transition: var(--transition);
}

.eq-item:hover {
  border-color: rgba(13,110,253,0.3);
  background: rgba(13,110,253,0.04);
}

.eq-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.eq-item h4 {
  font-size: 0.9rem;
  font-weight: 500;
}

/* ===== Contact ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
}

.ci-icon {
  font-size: 1.5rem;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(13,110,253,0.1);
  border-radius: 12px;
  flex-shrink: 0;
}

.contact-item strong {
  font-size: 0.85rem;
  color: var(--text2);
}

.contact-item p {
  color: var(--text);
  margin-top: 2px;
}

.contact-item a {
  color: var(--accent);
  text-decoration: none;
}

.contact-cta {
  background: linear-gradient(135deg, rgba(13,110,253,0.1), rgba(0,212,255,0.05));
  border: 1px solid rgba(13,110,253,0.2);
  border-radius: var(--radius);
  padding: 40px;
  text-align: center;
}

.contact-cta h3 {
  margin-bottom: 12px;
  font-size: 1.3rem;
}

.contact-cta p {
  color: var(--text2);
  margin-bottom: 24px;
}

/* ===== Footer ===== */
.footer {
  border-top: 1px solid rgba(255,255,255,0.05);
  padding: 60px 0 30px;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 40px;
}

.footer-brand strong {
  display: block;
  margin-top: 8px;
  font-size: 1.1rem;
}

.footer-brand p {
  color: var(--text2);
  font-size: 0.85rem;
  margin-top: 4px;
}

.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text2);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.05);
  color: var(--text2);
  font-size: 0.8rem;
}

.footer-bottom a {
  color: var(--text2);
}

/* ===== Chat Widget ===== */
.chat-widget {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 999;
}

.chat-toggle {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), #4a6cf7);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(13,110,253,0.4);
  transition: var(--transition);
  position: relative;
}

.chat-toggle:hover {
  transform: scale(1.1);
  box-shadow: 0 8px 30px rgba(13,110,253,0.5);
}

.chat-close { display: none; }
.chat-widget.open .chat-icon { display: none; }
.chat-widget.open .chat-close { display: block; }

.chat-panel {
  position: absolute;
  bottom: 68px;
  right: 0;
  width: 360px;
  max-height: 540px;
  background: var(--dark3);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  display: none;
  flex-direction: column;
  overflow: hidden;
}

.chat-widget.open .chat-panel {
  display: flex;
}

.chat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  background: rgba(13,110,253,0.08);
}

.chat-header strong { font-size: 1rem; }
.chat-header small { display: block; color: var(--text2); font-size: 0.75rem; margin-top: 2px; }

.chat-minimize {
  background: none;
  border: none;
  color: var(--text2);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
}

.chat-minimize:hover { background: rgba(255,255,255,0.06); }

.chat-login, .chat-messages, .chat-order {
  padding: 20px;
  flex: 1;
}

.chat-login p {
  color: var(--text2);
  font-size: 0.85rem;
  margin-bottom: 12px;
}

.chat-input {
  width: 100%;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.1);
  background: rgba(255,255,255,0.04);
  color: var(--text);
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition);
}

.chat-input:focus {
  border-color: var(--primary);
  background: rgba(255,255,255,0.06);
}

.chat-error {
  color: #f87171;
  font-size: 0.8rem;
  margin-top: 8px;
}

.chat-msg-list {
  max-height: 320px;
  overflow-y: auto;
  margin-bottom: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.msg {
  max-width: 80%;
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 0.85rem;
  line-height: 1.5;
  word-wrap: break-word;
}

.msg.customer {
  align-self: flex-end;
  background: var(--primary);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.msg.staff {
  align-self: flex-start;
  background: rgba(255,255,255,0.06);
  color: var(--text);
  border-bottom-left-radius: 4px;
}

.msg .msg-file {
  display: block;
  padding: 8px;
  margin-top: 6px;
  background: rgba(255,255,255,0.1);
  border-radius: 6px;
  text-decoration: none;
  color: var(--accent);
  font-size: 0.8rem;
}

.msg .msg-time {
  display: block;
  font-size: 0.7rem;
  color: rgba(255,255,255,0.4);
  margin-top: 4px;
}

.chat-input-area {
  display: flex;
  gap: 8px;
  align-items: flex-end;
}

.chat-input-area textarea {
  flex: 1;
  resize: none;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.1);
  background: rgba(255,255,255,0.04);
  color: var(--text);
  font-size: 0.85rem;
  outline: none;
  max-height: 80px;
  font-family: inherit;
}

.chat-input-area textarea:focus {
  border-color: var(--primary);
}

.btn-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.1);
  background: transparent;
  color: var(--text2);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  font-size: 1rem;
}

.btn-icon:hover { background: rgba(255,255,255,0.06); color: var(--text); }

.send-btn {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.send-btn:hover { background: var(--primary-dark); }

/* ===== Quote Display ===== */
.quote-card {
  background: rgba(13,110,253,0.08);
  border: 1px solid rgba(13,110,253,0.2);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
  margin-top: 12px;
}

.quote-card .amount {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  margin: 8px 0;
}

.quote-card .actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 12px;
}

.quote-card .actions .btn {
  min-width: 100px;
}

/* ===== Scroll Animation ===== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Loading ===== */
.loading {
  text-align: center;
  padding: 20px;
  color: var(--text2);
}

.loading::after {
  content: '...';
  animation: dots 1.5s infinite;
}

@keyframes dots {
  0%, 20% { content: '.'; }
  40% { content: '..'; }
  60%, 100% { content: '...'; }
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .nav-toggle { display: flex; }

  .nav-menu {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(10,14,23,0.98);
    flex-direction: column;
    padding: 20px;
    gap: 4px;
    transform: translateY(-100%);
    opacity: 0;
    transition: var(--transition);
    pointer-events: none;
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .nav-menu a {
    padding: 14px 16px;
    width: 100%;
    font-size: 1rem;
  }

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

  .chat-panel {
    width: calc(100vw - 32px);
    right: 0;
    bottom: 68px;
    max-height: 60vh;
  }

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

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

  .section {
    padding: 60px 0;
  }

  .hero-title {
    font-size: 1.8rem;
  }
}