/* ========================================
   CSS 变量系统 - 时尚B2B电商风
   ======================================== */

:root {
  --primary-color: #7C3AED;
  --secondary-color: #EC4899;
  --highlight-color: #F59E0B;
  --background-color: #FFFFFF;
  --page-bg: #FAFAFA;
  --text-color: #111827;
  --muted-color: #6B7280;
  --border-color: #E5E7EB;
  --card-border: #F3F4F6;
  --shadow-sm: 0 10px 30px rgba(124, 58, 237, 0.08);
  --shadow-lg: 0 20px 60px rgba(124, 58, 237, 0.12);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --font-family: 'Poppins', 'Alibaba PuHuiTi', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

/* ========================================
   全局样式
   ======================================== */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background: var(--page-bg);
  color: var(--text-color);
  line-height: 1.7;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ========================================
   布局
   ======================================== */

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px;
}

.grid {
  display: grid;
  gap: 20px;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.grid-5 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.flex {
  display: flex;
}

.space-between {
  justify-content: space-between;
}

.center {
  align-items: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 14px;
  background: rgba(124, 58, 237, 0.08);
  color: var(--primary-color);
}

.tag {
  display: inline-block;
  padding: 6px 10px;
  border-radius: 8px;
  background: #F3F4F6;
  font-size: 13px;
  color: #4B5563;
}

/* ========================================
   顶部与导航
   ======================================== */

.top-bar {
  background: #111827;
  color: #E5E7EB;
  font-size: 14px;
  padding: 8px 0;
}

.top-bar .container {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.top-links {
  display: flex;
  gap: 18px;
  align-items: center;
}

.top-links a {
  color: #E5E7EB;
  font-weight: 500;
}

nav {
  position: sticky;
  top: 0;
  z-index: 999;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  gap: 20px;
}

.logo {
  font-weight: 800;
  font-size: 22px;
  color: var(--primary-color);
  letter-spacing: 0.5px;
}

.nav-links {
  list-style: none;
  display: none;
  align-items: center;
  gap: 22px;
  font-weight: 600;
}

@media (min-width: 900px) {
  .nav-links {
    display: flex;
  }
}

.nav-links a {
  padding: 10px;
  border-radius: 10px;
  transition: background 0.2s ease, color 0.2s ease;
}

.nav-links a:hover {
  color: var(--primary-color);
  background: rgba(124, 58, 237, 0.08);
}

.nav-links a.active {
  color: var(--primary-color);
  background: rgba(124, 58, 237, 0.16);
}

.dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: white;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  min-width: 220px;
  padding: 10px 0;
  display: none;
}

.dropdown:hover .dropdown-menu {
  display: block;
}

.dropdown-menu a {
  display: block;
  padding: 10px 16px;
  color: #374151;
  font-weight: 500;
}

.dropdown-menu a:hover {
  background: rgba(124, 58, 237, 0.08);
  color: var(--primary-color);
}

/* ========================================
   按钮
   ======================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  border-radius: 12px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, #7C3AED, #6D28D9);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: rgba(236, 72, 153, 0.12);
  color: #DB2777;
  border: 1px solid rgba(236, 72, 153, 0.4);
}

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

/* ========================================
   卡片 & 产品
   ======================================== */

.card {
  background: #fff;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 6px;
}

.card-text {
  color: var(--muted-color);
  font-size: 15px;
}

.product-card {
  background: #fff;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.product-image {
  height: 220px;
  width: 100%;
  object-fit: cover;
}

.product-body {
  padding: 18px;
}

.price {
  font-weight: 800;
  color: var(--primary-color);
  font-size: 18px;
}

.price small {
  color: var(--muted-color);
  font-weight: 500;
}

.badge-hot {
  position: absolute;
  top: 16px;
  left: 16px;
  background: linear-gradient(135deg, #F59E0B, #FDBA74);
  color: #111827;
  padding: 6px 10px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 13px;
}

.badge-new {
  position: absolute;
  top: 16px;
  right: 16px;
  background: linear-gradient(135deg, #EC4899, #F472B6);
  color: #fff;
  padding: 6px 10px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 13px;
}

.meta {
  color: var(--muted-color);
  font-size: 14px;
  display: flex;
  gap: 12px;
  align-items: center;
}

/* ========================================
   Section 样式
   ======================================== */

section {
  padding: 70px 0;
}

.hero {
  background: radial-gradient(circle at 20% 20%, rgba(124, 58, 237, 0.12), transparent 25%),
              radial-gradient(circle at 80% 20%, rgba(236, 72, 153, 0.12), transparent 25%),
              linear-gradient(135deg, #F8F5FF, #FFFFFF);
  padding-top: 60px;
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 40px;
  align-items: center;
}

.hero h1 {
  font-size: 40px;
  line-height: 1.2;
  margin-bottom: 16px;
}

.hero p {
  color: var(--muted-color);
  font-size: 18px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(236, 72, 153, 0.08);
  color: #DB2777;
  font-weight: 700;
}

.section-title {
  font-size: 30px;
  text-align: center;
  margin-bottom: 10px;
}

.section-subtitle {
  text-align: center;
  color: var(--muted-color);
  margin-bottom: 36px;
  font-size: 16px;
}

.highlight {
  color: var(--secondary-color);
}

.stat-board {
  background: #fff;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.stat {
  text-align: center;
}

.stat-number {
  font-size: 32px;
  font-weight: 800;
  color: var(--primary-color);
}

.stat-label {
  color: var(--muted-color);
}

.steps {
  display: grid;
  gap: 14px;
}

.step {
  display: flex;
  gap: 14px;
  padding: 12px;
  background: #FFF7ED;
  border-radius: 12px;
  border: 1px solid #FED7AA;
}

.step span {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  background: #FDBA74;
  color: #7C2D12;
}

.list {
  display: grid;
  gap: 10px;
}

.list li {
  list-style: none;
  display: flex;
  gap: 10px;
  align-items: flex-start;
  color: var(--muted-color);
}

.list li::before {
  content: '✓';
  color: var(--secondary-color);
  font-weight: 800;
}

.table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
}

.table th, .table td {
  padding: 14px 16px;
  border: 1px solid var(--border-color);
  background: #fff;
}

.table th {
  background: #F3F4F6;
  text-align: left;
}

/* ========================================
   页脚
   ======================================== */

footer {
  background: #0B1021;
  color: #E5E7EB;
  padding: 50px 0 30px;
  margin-top: 60px;
}

.footer-grid {
  display: grid;
  gap: 22px;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.footer-title {
  font-weight: 800;
  margin-bottom: 12px;
}

.footer-links {
  list-style: none;
  display: grid;
  gap: 8px;
  color: #CBD5E1;
}

.footer-links a:hover {
  color: #F472B6;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  margin-top: 26px;
  padding-top: 18px;
  text-align: center;
  color: #9CA3AF;
  font-size: 14px;
}

/* ========================================
   响应式
   ======================================== */

@media (max-width: 768px) {
  section { padding: 50px 0; }
  .hero h1 { font-size: 30px; }
  .nav-links { display: none; }
}

/* ========================================
   子页布局与组件
   ======================================== */

.sub-hero {
  background: linear-gradient(120deg, rgba(124,58,237,0.08), rgba(236,72,153,0.08));
  padding: 60px 0 30px;
}

.sub-hero h1 {
  font-size: 34px;
  margin-bottom: 10px;
}

.sub-hero p {
  color: var(--muted-color);
}

.breadcrumb {
  display: flex;
  gap: 8px;
  font-size: 14px;
  color: var(--muted-color);
  margin-top: 10px;
}

.breadcrumb a {
  color: var(--primary-color);
}

.layout-two {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 30px;
  align-items: start;
}

.info-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 24px;
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-sm);
}

.info-card h3 {
  margin-bottom: 10px;
  font-size: 22px;
}

.timeline {
  border-left: 3px solid var(--primary-color);
  padding-left: 20px;
  display: grid;
  gap: 24px;
}

.timeline-item span {
  display: inline-block;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 6px;
}

.pill-nav {
  display: inline-flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 14px 0;
}

.pill-nav a {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--border-color);
  background: #fff;
  font-weight: 600;
}

.data-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.cta-panel {
  background: linear-gradient(135deg, #7C3AED, #EC4899);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-lg);
}

.contact-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 24px;
  border: 1px solid var(--card-border);
  display: grid;
  gap: 16px;
}

.form-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.input, .textarea, select {
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 15px;
  background: #fff;
}

.textarea {
  min-height: 120px;
  resize: vertical;
}

.badge-outline {
  border: 1px dashed var(--primary-color);
  background: transparent;
  color: var(--primary-color);
  padding: 8px 14px;
  border-radius: 999px;
  font-weight: 600;
}