/* ============================================================
   TUSKO Diamond Tools - Main Stylesheet
   Primary: #000000 | Accent: Pantone 137C (#F5A623 / #E8930A)
   ============================================================ */

:root {
  --primary: #000000;
  --accent: #E8930A;
  --accent-light: #F5A623;
  --accent-dark: #C47808;
  --bg-dark: #0A0A0A;
  --bg-card: #111111;
  --bg-card-hover: #1A1A1A;
  --text-primary: #FFFFFF;
  --text-secondary: #AAAAAA;
  --text-muted: #666666;
  --border: #222222;
  --border-accent: rgba(232, 147, 10, 0.3);
  --gradient-accent: linear-gradient(135deg, #E8930A, #F5A623);
  --gradient-dark: linear-gradient(180deg, #000000 0%, #111111 100%);
  --shadow-accent: 0 0 30px rgba(232, 147, 10, 0.15);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.6);
  --font-heading: 'Bebas Neue', 'Impact', sans-serif;
  --font-body: 'Inter', 'Segoe UI', sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --radius: 2px;
  --radius-lg: 4px;
}

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

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

body {
  background: var(--bg-dark);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Import Fonts */
@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=Inter:wght@300;400;500;600;700&family=Rajdhani:wght@400;500;600;700&display=swap');

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: #000; }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 3px; }

/* ===== SELECTION ===== */
::selection { background: var(--accent); color: #000; }

/* ===== TYPOGRAPHY ===== */
h1, h2, h3 { font-family: 'Rajdhani', var(--font-body); font-weight: 700; letter-spacing: 0.02em; }
h4, h5, h6 { font-family: var(--font-body); font-weight: 600; }

/* ===== LINKS ===== */
a { color: inherit; text-decoration: none; transition: var(--transition); }

/* ===== HEADER / NAV ===== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.header.scrolled {
  background: rgba(0, 0, 0, 0.98);
  border-bottom-color: var(--border-accent);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-icon {
  width: 42px;
  height: 42px;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.logo-name {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 22px;
  letter-spacing: 4px;
  color: var(--text-primary);
}

.logo-sub {
  font-size: 9px;
  letter-spacing: 3px;
  color: var(--accent);
  text-transform: uppercase;
  font-weight: 500;
}

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

.nav-menu a {
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-secondary);
  border-radius: var(--radius);
  transition: var(--transition);
  position: relative;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 16px;
  right: 16px;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transition: var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--text-primary);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
  transform: scaleX(1);
}

/* Dropdown */
.nav-dropdown {
  position: relative;
}

/* 透明桥：防止鼠标在 nav-item 和菜单之间的缝隙中丢失 hover */
.nav-dropdown::after {
  content: '';
  position: absolute;
  top: 100%;
  left: -20px;
  right: -20px;
  height: 16px;
  background: transparent;
}

.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-10px);
  background: #0F0F0F;
  padding-top: 8px;
  border: 1px solid var(--border);
  border-top: 2px solid var(--accent);
  min-width: 220px;
  padding: 8px 0;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown.is-open .nav-dropdown-menu {
  opacity: 1;
  pointer-events: all;
  transform: translateX(-50%) translateY(0);
}

.nav-dropdown-menu a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  font-size: 12px;
  letter-spacing: 1px;
  color: var(--text-secondary) !important;
  border-left: 2px solid transparent;
}

.nav-dropdown-menu a:hover {
  color: var(--accent) !important;
  border-left-color: var(--accent);
  background: rgba(232, 147, 10, 0.05);
  padding-left: 24px;
}

.nav-dropdown-menu a::after { display: none; }

.nav-cta {
  background: var(--gradient-accent) !important;
  color: #000 !important;
  font-weight: 700 !important;
  padding: 10px 24px !important;
  border-radius: var(--radius) !important;
  letter-spacing: 2px;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}

.nav-cta:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(232, 147, 10, 0.4);
}

.nav-cta::after { display: none !important; }

.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-primary);
  transition: var(--transition);
}

/* ===== HERO SECTION ===== */
.hero {
  position: relative;
  min-height: 50vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: #000;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-svg-bg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.6;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(0,0,0,0.85) 0%,
    rgba(0,0,0,0.5) 50%,
    rgba(0,0,0,0.3) 100%
  );
}

.hero-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.particle {
  position: absolute;
  width: 2px;
  height: 2px;
  background: var(--accent);
  border-radius: 50%;
  animation: float linear infinite;
  opacity: 0.6;
}

@keyframes float {
  0% { transform: translateY(100vh) scale(0); opacity: 0; }
  10% { opacity: 0.6; }
  90% { opacity: 0.6; }
  100% { transform: translateY(-100px) scale(1); opacity: 0; }
}

/* Hero 内部横排容器 */
.hero-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 40px 40px;
}

.hero-content {
  position: relative;
  z-index: 2;
  /* 两列横向：左标题 / 右内容 */
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  column-gap: 48px;
  align-items: center;
  justify-items: start;
  flex: 1 1 auto;
  min-width: 0;
  padding: 0;
  min-height: 0;
}

/* Badge 跨两列，单独一行置顶 */
.hero-badge {
  grid-column: 1 / -1;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(232, 147, 10, 0.1);
  border: 1px solid rgba(232, 147, 10, 0.3);
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
  width: fit-content;
}

.hero-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-title {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(52px, 7vw, 126px);
  line-height: 0.92;
  letter-spacing: 4px;
  color: var(--text-primary);
  margin-bottom: 0;
  /* 左列 */
  grid-column: 1;
  grid-row: 2;
  white-space: nowrap;
}

.hero-title .accent { color: var(--accent); }

/* 右列容器：副标+描述+数据+按钮 */
.hero-right {
  grid-column: 2;
  grid-row: 2;
  display: flex;
  flex-direction: column;
  gap: 0;
  padding-left: 36px;
  border-left: 1px solid rgba(232,147,10,0.25);
  min-width: 380px;
  max-width: 520px;
}

.hero-subtitle {
  font-family: 'Rajdhani', sans-serif;
  font-size: clamp(12px, 1.3vw, 17px);
  font-weight: 400;
  letter-spacing: 5px;
  text-transform: uppercase;
  text-align: left;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.hero-desc {
  max-width: 480px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--text-secondary);
  margin-bottom: 18px;
  text-align: left;
}

.hero-stats {
  display: flex;
  gap: 22px;
  margin-bottom: 20px;
  flex-wrap: wrap;
  justify-content: flex-start;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-num {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 28px;
  line-height: 1;
  color: var(--accent);
  letter-spacing: 2px;
}

.stat-label {
  font-size: 9px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-top: 2px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: flex-start;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 11px 26px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-accent);
  color: #000;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(232, 147, 10, 0.4);
  opacity: 0.95;
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid rgba(255,255,255,0.3);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(232, 147, 10, 0.05);
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 10px;
  letter-spacing: 3px;
  text-transform: uppercase;
}

.scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollPulse 2s infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* ===== SECTIONS ===== */
.section {
  padding: 100px 40px;
  max-width: 1400px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.section-title {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(36px, 5vw, 56px);
  letter-spacing: 3px;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.section-line {
  width: 60px;
  height: 2px;
  background: var(--gradient-accent);
  margin: 0 auto 24px;
}

.section-desc {
  max-width: 600px;
  margin: 0 auto;
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.8;
}

/* ===== PRODUCT GRID ===== */
.products-section {
  background: var(--bg-dark);
  padding: 100px 0;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
}

/* ── 产品卡片（图片 + 文字版）── */
.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
  overflow: hidden;
}

.product-card:hover {
  border-color: var(--accent);
  background: #161616;
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(232,147,10,0.12);
}

.product-card-link {
  display: flex;
  flex-direction: column;
  height: 100%;
  text-decoration: none;
  box-sizing: border-box;
}

/* 图片区域 */
.pc-img-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #0e0e0e;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pc-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  transition: transform 0.5s ease;
  display: block;
  padding: 10px;
}

.product-card:hover .pc-img-wrap img {
  transform: scale(1.04);
}

/* 图片加载失败的占位 */
.pc-img-wrap .pc-img-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #0d0d0d;
}

/* 文字信息区 */
.pc-body {
  padding: 20px 22px 18px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.pc-num {
  font-family: 'Rajdhani', sans-serif;
  font-size: 32px;
  font-weight: 700;
  color: #252525;
  line-height: 1;
  margin-bottom: 10px;
  transition: color 0.3s;
}

.product-card:hover .pc-num {
  color: var(--accent);
}

.pc-series {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
}

.pc-name {
  font-family: 'Rajdhani', sans-serif;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.2;
}

.pc-desc {
  font-size: 12.5px;
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 14px;
}

.pc-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  opacity: 0;
  transform: translateX(-6px);
  transition: var(--transition);
}

.product-card:hover .pc-cta {
  opacity: 1;
  transform: translateX(0);
}

/* 兼容旧选择器，避免报错 */
.product-img-wrap, .product-title-wrap, .product-info,
.product-series-tag, .product-name, .product-info-title,
.product-info-desc { display: none; }

.product-info-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
}

.product-number {
  position: absolute;
  top: 16px;
  left: 16px;
  font-family: 'Bebas Neue', sans-serif;
  font-size: 48px;
  line-height: 1;
  color: rgba(255,255,255,0.05);
  pointer-events: none;
}

/* ===== FEATURES SECTION ===== */
.features-section {
  background: #050505;
  padding: 100px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}

.feature-item {
  padding: 29px 40px;
  border-right: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.feature-item:last-child { border-right: none; }

.feature-item::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transition: var(--transition);
}

.feature-item:hover::before { transform: scaleX(1); }

.feature-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 24px;
  color: var(--accent);
}

.feature-num {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 56px;
  line-height: 1;
  color: var(--accent);
  letter-spacing: 2px;
}

.feature-unit {
  font-size: 20px;
  color: var(--text-muted);
}

.feature-title {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin: 8px 0;
}

.feature-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ===== PRODUCT PAGE ===== */
.product-page {
  padding-top: 72px;
  min-height: 100vh;
}

.product-hero {
  background: var(--bg-dark);
  padding: 80px 40px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  max-width: 1400px;
  margin: 0 auto;
  align-items: center;
}

.product-hero-img {
  position: relative;
  background: #0A0A0A;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  width: 100%;
  min-width: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
}

.product-hero-img::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(232,147,10,0.05) 0%, transparent 70%);
}

.product-hero-img svg {
  width: 100%;
  height: auto;
  max-width: 300px;
  max-height: 300px;
  display: block;
  filter: drop-shadow(0 0 40px rgba(232,147,10,0.2));
}

.product-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 1px;
  margin-bottom: 24px;
}

.product-breadcrumb a { color: var(--text-muted); }
.product-breadcrumb a:hover { color: var(--accent); }
.product-breadcrumb .sep { color: var(--border); }

.product-series {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.product-page-title {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(40px, 5vw, 72px);
  line-height: 0.95;
  letter-spacing: 3px;
  color: var(--text-primary);
  margin-bottom: 24px;
}

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

.product-features {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 40px;
}

.product-feature {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.product-feature::before {
  content: '';
  width: 20px;
  height: 2px;
  background: var(--accent);
  flex-shrink: 0;
  margin-top: 10px;
}

/* ===== SPECS TABLE ===== */
.specs-section {
  padding: 80px 40px;
  max-width: 1400px;
  margin: 0 auto;
}

.specs-title {
  font-family: 'Rajdhani', sans-serif;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--text-primary);
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.specs-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.specs-table thead th {
  background: rgba(232, 147, 10, 0.08);
  padding: 14px 20px;
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  border-bottom: 1px solid var(--border-accent);
  white-space: nowrap;
}

.specs-table tbody td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
  transition: var(--transition);
}

.specs-table tbody tr:hover td {
  background: rgba(232, 147, 10, 0.03);
  color: var(--text-primary);
}

.specs-table tbody td:first-child {
  color: var(--text-primary);
  font-weight: 600;
  font-family: 'Rajdhani', sans-serif;
  font-size: 15px;
  letter-spacing: 1px;
}

/* ===== ABOUT SECTION ===== */
.about-section {
  background: #050505;
  padding: 100px 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
}

.about-tag {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.about-title {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(40px, 5vw, 64px);
  letter-spacing: 3px;
  line-height: 0.95;
  color: var(--text-primary);
  margin-bottom: 24px;
}

.about-text {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
}

.about-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 40px;
}

.highlight-item {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  transition: var(--transition);
}

.highlight-item:hover {
  border-color: var(--accent);
  background: var(--bg-card-hover);
}

.highlight-num {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 36px;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
}

.highlight-label {
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 1px;
}

.about-visual {
  position: relative;
}

.about-visual-inner {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/5;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.about-visual-inner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 70%, rgba(232,147,10,0.08) 0%, transparent 60%);
}

.corner-accent {
  position: absolute;
  width: 80px;
  height: 80px;
}

.corner-accent.tl { top: 16px; left: 16px; }
.corner-accent.br { bottom: 16px; right: 16px; transform: rotate(180deg); }

/* ===== CONTACT SECTION ===== */
.contact-section {
  padding: 100px 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
}

.contact-info-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}

.contact-info-icon {
  width: 44px;
  height: 44px;
  background: rgba(232, 147, 10, 0.1);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--accent);
}

.contact-info-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.contact-info-value {
  font-size: 15px;
  color: var(--text-primary);
}

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-muted);
}

.form-input,
.form-textarea,
.form-select {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  color: var(--text-primary);
  font-size: 14px;
  font-family: var(--font-body);
  transition: var(--transition);
  outline: none;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--accent);
  background: var(--bg-card-hover);
  box-shadow: 0 0 0 2px rgba(232, 147, 10, 0.1);
}

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

/* ===== FOOTER ===== */
footer {
  background: #000;
  border-top: 1px solid var(--border);
  padding: 80px 40px 40px;
}

.footer-grid {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 60px;
  margin-bottom: 60px;
}

.footer-brand .logo-name {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 28px;
  letter-spacing: 4px;
  color: var(--text-primary);
  display: block;
  margin-bottom: 4px;
}

.footer-brand .logo-sub {
  font-size: 9px;
  letter-spacing: 3px;
  color: var(--accent);
  text-transform: uppercase;
  display: block;
  margin-bottom: 20px;
}

.footer-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 24px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.social-link {
  width: 40px;
  height: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: var(--transition);
  font-size: 16px;
}

.social-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(232, 147, 10, 0.05);
}

.footer-col-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 14px;
  color: var(--text-muted);
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}

.footer-links a:hover { color: var(--accent); padding-left: 4px; }

.footer-bottom {
  max-width: 1400px;
  margin: 0 auto;
  padding-top: 40px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

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

.footer-cert {
  display: flex;
  gap: 16px;
}

.cert-badge {
  padding: 4px 12px;
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 1px;
}

/* ===== ADMIN PANEL ===== */
.admin-body {
  background: #050505;
  min-height: 100vh;
  font-family: var(--font-body);
}

.admin-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: 100vh;
}

.admin-sidebar {
  background: #000;
  border-right: 1px solid var(--border);
  padding: 24px 0;
  position: fixed;
  width: 240px;
  height: 100vh;
  overflow-y: auto;
  z-index: 100;
}

.admin-logo {
  padding: 0 24px 32px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
}

.admin-logo .logo-name {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 20px;
  letter-spacing: 3px;
  color: var(--text-primary);
  display: block;
}

.admin-logo .logo-sub {
  font-size: 9px;
  letter-spacing: 2px;
  color: var(--accent);
  text-transform: uppercase;
}

.admin-nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 24px;
  font-size: 13px;
  letter-spacing: 1px;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
  border-left: 2px solid transparent;
}

.admin-nav-item:hover,
.admin-nav-item.active {
  color: var(--text-primary);
  background: rgba(232, 147, 10, 0.05);
  border-left-color: var(--accent);
}

.admin-main {
  margin-left: 240px;
  padding: 40px;
  min-height: 100vh;
}

.admin-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.admin-title {
  font-family: 'Rajdhani', sans-serif;
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--text-primary);
}

.admin-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 24px;
}

.admin-card-title {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.admin-card-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.products-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.product-admin-card {
  background: #0A0A0A;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}

.product-admin-card:hover {
  border-color: var(--border-accent);
}

.product-admin-img {
  height: 160px;
  background: #050505;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.product-admin-img svg {
  max-height: 100%;
}

.product-admin-info {
  padding: 16px;
  border-top: 1px solid var(--border);
}

.product-admin-name {
  font-family: 'Rajdhani', sans-serif;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.product-admin-series {
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.product-admin-actions {
  display: flex;
  gap: 8px;
}

.admin-btn {
  flex: 1;
  padding: 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
  border-radius: var(--radius);
}

.admin-btn:hover { border-color: var(--accent); color: var(--accent); }
.admin-btn.danger:hover { border-color: #ef4444; color: #ef4444; }

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(4px);
  z-index: 9999;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.modal-overlay.open { display: flex; }

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-top: 2px solid var(--accent);
  border-radius: var(--radius-lg);
  padding: 40px;
  max-width: 680px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
}

.modal-title {
  font-family: 'Rajdhani', sans-serif;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--text-primary);
  margin-bottom: 32px;
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 32px;
  height: 32px;
  background: var(--bg-card-hover);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: var(--transition);
}

.modal-close:hover { color: #ef4444; border-color: #ef4444; }

/* ===== TOAST ===== */
.toast-container {
  position: fixed;
  top: 90px;
  right: 24px;
  z-index: 9998;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  padding: 14px 20px;
  border-radius: var(--radius-lg);
  font-size: 14px;
  color: var(--text-primary);
  box-shadow: var(--shadow-card);
  animation: slideIn 0.3s ease;
  min-width: 280px;
}

.toast.success { border-left-color: #10b981; }
.toast.error { border-left-color: #ef4444; }

@keyframes slideIn {
  from { transform: translateX(20px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ===== BREADCRUMB BAR ===== */
.page-header-bar {
  background: #050505;
  border-bottom: 1px solid var(--border);
  padding: 16px 40px;
  margin-top: 72px;
}

.page-header-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1200px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-item { border-bottom: 1px solid var(--border); }
  .products-page-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .nav-menu { display: none; }
  .nav-toggle { display: flex; }
  .nav-menu.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(0,0,0,0.98);
    padding: 24px;
    border-bottom: 1px solid var(--border);
    gap: 4px;
  }
  .nav-dropdown-menu {
    position: static;
    transform: none;
    opacity: 1;
    pointer-events: all;
    background: transparent;
    border: none;
    padding: 0 0 0 16px;
  }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .product-hero, .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .admin-layout { grid-template-columns: 1fr; }
  .admin-sidebar { display: none; }
  .admin-main { margin-left: 0; }
  .section { padding: 60px 24px; }
}

@media (max-width: 600px) {
  .products-grid { grid-template-columns: 1fr; }
  .products-page-grid { grid-template-columns: 1fr; padding: 0 16px 24px; }
  .hero-stats { gap: 24px; }
  .features-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .about-highlights { grid-template-columns: 1fr; }
  .nav-container { padding: 0 20px; }
  /* 小屏恢复单列 */
  .hero-content { grid-template-columns: 1fr; }
  .hero-title { grid-column: 1; grid-row: auto; white-space: normal; }
  .hero-right { grid-column: 1; grid-row: auto; padding-left: 0; border-left: none; }
}
}

/* ===== ANIMATIONS ===== */
.fade-up {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Product SVG containers are always visible */
.product-hero-img,
.product-img-wrap,
.product-img-wrap .product-svg {
  opacity: 1 !important;
  transform: none !important;
}

.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }

/* ===== UTILS ===== */
.text-accent { color: var(--accent); }
.text-muted { color: var(--text-muted); }
.text-center { text-align: center; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-40 { margin-top: 40px; }
.gap-line {
  width: 100%;
  height: 1px;
  background: var(--border);
  margin: 60px 0;
}

/* ---- Real Logo Image ---- */
.logo-img {
  height: 44px;
  width: auto;
  display: block;
  object-fit: contain;
  filter: brightness(1.05);
}