/* ============================================
   WeiMai Smart Boxing — Global Styles
   Multi-Product Export Showcase
   ============================================ */

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #1a1a26;
  --bg-card-hover: #22222f;
  --accent-orange: #ff5a1f;
  --accent-orange-glow: rgba(255, 90, 31, 0.35);
  --accent-cyan: #00d4ff;
  --accent-cyan-glow: rgba(0, 212, 255, 0.25);
  --accent-green: #00e676;
  --accent-purple: #b388ff;
  --text-primary: #f0f0f5;
  --text-secondary: #a0a0b0;
  --text-muted: #6a6a7a;
  --border-color: #2a2a3a;
  --gradient-hero: linear-gradient(135deg, #0a0a0f 0%, #1a1020 50%, #0a0a0f 100%);
  --gradient-accent: linear-gradient(135deg, #ff5a1f 0%, #ff8c42 100%);
  --gradient-cyan: linear-gradient(135deg, #00d4ff 0%, #0099cc 100%);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-glow-orange: 0 0 40px var(--accent-orange-glow);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --max-width: 1200px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ============================================
   Navigation
   ============================================ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.5px;
  cursor: pointer;
}

.nav-logo .logo-mark {
  width: 36px; height: 36px;
  background: var(--gradient-accent);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 900;
  color: #fff;
}

.nav-logo .logo-text span { color: var(--accent-orange); }

.nav-links {
  display: flex;
  gap: 4px;
  list-style: none;
  align-items: center;
}

.nav-links a, .nav-links button {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.25s ease;
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
}

.nav-links a:hover, .nav-links button:hover {
  color: var(--text-primary);
  background: var(--bg-card);
}

.nav-links a.active, .nav-links button.active {
  color: var(--accent-orange);
  background: rgba(255, 90, 31, 0.1);
}

.lang-switcher {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  margin-left: 8px;
}

.lang-switcher button {
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 4px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s;
}

.lang-switcher button.active {
  background: var(--accent-orange);
  color: #fff;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 24px;
  cursor: pointer;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  background: var(--gradient-hero);
  overflow: hidden;
  padding-top: 70px;
}

.hero::before {
  content: "";
  position: absolute;
  top: -50%; right: -20%;
  width: 800px; height: 800px;
  background: radial-gradient(circle, var(--accent-orange-glow) 0%, transparent 70%);
  animation: float 8s ease-in-out infinite;
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -30%; left: -10%;
  width: 600px; height: 600px;
  background: radial-gradient(circle, var(--accent-cyan-glow) 0%, transparent 70%);
  animation: float 10s ease-in-out infinite reverse;
  pointer-events: none;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -30px) scale(1.05); }
}

.hero-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 60px 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content .badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(255, 90, 31, 0.12);
  border: 1px solid rgba(255, 90, 31, 0.3);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-orange);
  margin-bottom: 24px;
  letter-spacing: 1px;
}

.hero h1 {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero h1 .highlight {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 520px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 40px;
}

.hero-tag {
  padding: 6px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 100px;
  font-size: 13px;
  color: var(--text-secondary);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.3s ease;
  font-family: inherit;
}

.btn-primary {
  background: var(--gradient-accent);
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-orange-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--accent-orange-glow);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-outline:hover {
  border-color: var(--accent-orange);
  color: var(--accent-orange);
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-stats {
  display: flex;
  gap: 24px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.hero-stat {
  text-align: center;
}

.hero-stat .num {
  font-size: 32px;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stat .label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

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

.section-alt {
  background: var(--bg-secondary);
}

.section-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px;
}

.section-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent-orange);
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.2;
}

.section-header p {
  font-size: 17px;
  color: var(--text-secondary);
}

/* ============================================
   Product Cards Grid
   ============================================ */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 28px;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.4s ease;
  cursor: pointer;
  position: relative;
}

.product-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent-orange);
  box-shadow: var(--shadow-glow-orange);
}

.product-card-image {
  height: 220px;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.product-card-image img {
  max-height: 180px;
  object-fit: contain;
  transition: transform 0.4s ease;
}

.product-card:hover .product-card-image img {
  transform: scale(1.05);
}

.product-card-image .product-icon {
  font-size: 72px;
  opacity: 0.9;
}

.product-card-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 4px 12px;
  background: rgba(255, 90, 31, 0.9);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.product-card-body {
  padding: 28px;
}

.product-card-body h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.product-card-body .product-model {
  font-size: 13px;
  color: var(--accent-cyan);
  font-weight: 600;
  margin-bottom: 12px;
}

.product-card-body p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.6;
}

.product-card-features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.product-card-features span {
  padding: 4px 10px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 100px;
  font-size: 12px;
  color: var(--text-muted);
}

.product-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-orange);
  transition: gap 0.2s;
}

.product-card:hover .product-card-link {
  gap: 12px;
}

/* ============================================
   Product Detail View
   ============================================ */
.product-detail {
  display: none;
  padding-top: 90px;
  min-height: 100vh;
}

.product-detail.active {
  display: block;
}

.product-detail-hero {
  padding: 60px 0 40px;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

.product-detail-hero::before {
  content: "";
  position: absolute;
  top: -30%; right: -10%;
  width: 500px; height: 500px;
  background: radial-gradient(circle, var(--accent-orange-glow) 0%, transparent 70%);
  pointer-events: none;
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  margin-bottom: 32px;
  transition: all 0.2s;
  font-family: inherit;
}

.back-btn:hover {
  color: var(--accent-orange);
  border-color: var(--accent-orange);
}

.product-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.product-detail-image {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  min-height: 400px;
  border: 1px solid var(--border-color);
}

.product-detail-image img {
  max-height: 320px;
  object-fit: contain;
}

.product-detail-image .product-icon-large {
  font-size: 140px;
}

.product-download {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  width: 100%;
}

.product-download .btn {
  width: 100%;
  max-width: 280px;
  justify-content: center;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.product-download .download-icon {
  font-size: 16px;
}

.product-download .download-hint {
  font-size: 12px;
  color: var(--text-muted);
}

.product-detail-info h1 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  margin-bottom: 8px;
  line-height: 1.2;
}

.product-detail-info .product-model-line {
  font-size: 16px;
  color: var(--accent-cyan);
  font-weight: 600;
  margin-bottom: 20px;
}

.product-detail-info .product-desc {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.8;
}

.product-specs-inline {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.spec-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 16px;
}

.spec-item .spec-value {
  font-size: 22px;
  font-weight: 800;
  color: var(--accent-orange);
  margin-bottom: 4px;
}

.spec-item .spec-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ============================================
   Features Grid
   ============================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: all 0.3s ease;
}

.feature-card:hover {
  border-color: var(--accent-orange);
  transform: translateY(-4px);
}

.feature-icon {
  font-size: 36px;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================
   Specs Table
   ============================================ */
.specs-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.specs-table th, .specs-table td {
  padding: 14px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.specs-table th {
  background: var(--bg-secondary);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  width: 35%;
}

.specs-table td {
  font-size: 14px;
  color: var(--text-secondary);
}

.specs-table tr:last-child th,
.specs-table tr:last-child td {
  border-bottom: none;
}

/* ============================================
   Training Modes
   ============================================ */
.modes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.mode-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all 0.3s;
}

.mode-card:hover {
  border-color: var(--accent-cyan);
}

.mode-card .mode-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 600;
  margin-bottom: 12px;
}

.mode-tag.relax {
  background: rgba(0, 212, 255, 0.12);
  color: var(--accent-cyan);
}

.mode-tag.burn {
  background: rgba(255, 90, 31, 0.12);
  color: var(--accent-orange);
}

.mode-card h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.mode-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ============================================
   Application Scenarios
   ============================================ */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.scenario-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  text-align: center;
  transition: all 0.3s;
}

.scenario-card:hover {
  border-color: var(--accent-orange);
  transform: translateY(-4px);
}

.scenario-icon {
  font-size: 40px;
  margin-bottom: 16px;
}

.scenario-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
}

.scenario-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ============================================
   Page Header (sub pages)
   ============================================ */
.page-header {
  padding: 140px 24px 60px;
  text-align: center;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: "";
  position: absolute;
  top: -50%; left: 50%;
  transform: translateX(-50%);
  width: 800px; height: 400px;
  background: radial-gradient(ellipse, var(--accent-orange-glow) 0%, transparent 70%);
  pointer-events: none;
}

.page-header .section-label,
.page-header h1,
.page-header p {
  position: relative;
  z-index: 1;
}

.page-header h1 {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 800;
  margin-bottom: 16px;
}

.page-header p {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ============================================
   Contact Section
   ============================================ */
.contact-section {
  background: var(--bg-secondary);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.contact-info h2 {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 800;
  margin-bottom: 16px;
}

.contact-info > p {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

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

.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.contact-item-icon {
  width: 44px; height: 44px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.contact-item h4 {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.contact-item p, .contact-item a {
  font-size: 15px;
  color: var(--text-primary);
}

.contact-item a:hover {
  color: var(--accent-orange);
}

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
}

.contact-form h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-orange);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* ============================================
   Company / About Section
   ============================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.about-stat {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  text-align: center;
}

.about-stat .num {
  font-size: 36px;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 4px;
}

.about-stat .label {
  font-size: 13px;
  color: var(--text-muted);
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 60px 0 30px;
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 16px;
  max-width: 300px;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color 0.2s;
  cursor: pointer;
}

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

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--text-muted);
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 968px) {
  .hero-container,
  .product-detail-grid,
  .contact-grid,
  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    flex-direction: column;
    padding: 20px;
    gap: 4px;
    border-bottom: 1px solid var(--border-color);
  }

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

  .nav-links a, .nav-links button {
    width: 100%;
    text-align: left;
    padding: 12px 16px;
  }

  .nav-toggle {
    display: block;
  }

  .lang-switcher {
    margin-left: 0;
    margin-top: 8px;
  }
}

@media (max-width: 640px) {
  .section { padding: 60px 0; }
  .products-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .product-specs-inline { grid-template-columns: 1fr; }
  .hero-stats { gap: 16px; }
}

/* ============================================
   Utility
   ============================================ */
.hidden { display: none !important; }
.text-center { text-align: center; }
.mt-40 { margin-top: 40px; }
.mb-40 { margin-bottom: 40px; }