* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

:root {
  --g-blue: #4285F4;
  --g-red: #EA4335;
  --g-yellow: #FBBC05;
  --g-green: #34A853;
  --dark: #121212;
  --card-bg: rgba(255,255,255,.96);
  --glass-bg: rgba(255,255,255,.72);
}

body {
  color: #111;
  background:
    radial-gradient(circle at 12% 12%, rgba(66,133,244,.45), transparent 28%),
    radial-gradient(circle at 88% 8%, rgba(234,67,53,.45), transparent 28%),
    radial-gradient(circle at 50% 90%, rgba(52,168,83,.35), transparent 32%),
    linear-gradient(135deg, #f7f9ff 0%, #eaf4ff 45%, #fff7f0 100%);
  background-attachment: fixed;
  line-height: 1.6;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 16px;
}

/* 导航 */
header {
  position: sticky;
  top: 0;
  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);
  background: rgba(255,255,255,.58);
  border-bottom: 1px solid rgba(255,255,255,.8);
  box-shadow: 0 8px 30px rgba(66,133,244,.08);
  z-index: 99;
}

.nav-wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
}

.logo {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: .5px;
  background: linear-gradient(90deg, var(--g-blue), var(--g-red), var(--g-yellow), var(--g-green));
  background-size: 300% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-decoration: none;
  animation: logoGradient 8s linear infinite;
}

@keyframes logoGradient {
  0% { background-position: 0% 0; }
  100% { background-position: 300% 0; }
}

.nav-menu {
  display: flex;
  gap: 36px;
}

.nav-menu a {
  text-decoration: none;
  color: #334155;
  font-weight: 500;
  position: relative;
  transition: .22s ease;
}

.nav-menu a:hover {
  color: var(--g-blue);
}

.nav-menu a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--g-blue), var(--g-green));
  transition: .22s ease;
}

.nav-menu a:hover::after {
  width: 100%;
}

.btn-group {
  display: flex;
  gap: 12px;
}

.btn {
  padding: 10px 24px;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  transition: .25s ease;
  box-shadow: 0 4px 18px rgba(0,0,0,.08);
}

.btn-outline {
  border: 1px solid rgba(66,133,244,.35);
  color: var(--g-blue);
  background: rgba(201,240,201,.1);
}

.btn-outline:hover {
  background: rgba(66,133,244,.12);
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--g-blue), #64a0fc);
  color: white;
}

.btn-primary:hover {
  background: linear-gradient(135deg, #3367d6, var(--g-blue));
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(66,133,244,.35);
}

.mobile-menu-btn {
  display: none;
  border: 0;
  background: none;
  font-size: 28px;
  color: #334155;
}

/*移动端汉堡菜单面板*/
.mobile-menu-panel{
  position:fixed;
  top:72px;
  left:0;
  width:100%;
  background:#fff;
  box-shadow:0 8px 20px rgba(0,0,0,0.1);
  padding:24px 20px;
  display:none;
  z-index:98;
}
.mobile-menu-panel a{
  display:block;
  padding:12px 0;
  color:#334155;
  text-decoration:none;
  font-weight:500;
  font-size:16px;
}
.mobile-menu-panel.show{
  display:block;
}
.mobile-menu-panel .btn-wrapper{
  margin-top:24px;
  display:flex;
  gap:16px;
}
.mobile-menu-panel .btn{
  flex:1;
  text-align:center;
  padding:12px 0;
  font-size:16px;
}

/*滚动渐入动画*/
.fade-in{
  opacity:0;
  transform:translateY(30px);
  transition:0.6s ease-out;
}
.fade-in.active{
  opacity:1;
  transform:translateY(0);
}

/* 首屏 */
.hero {
  padding: 60px 0 30px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 48px;
  align-items: center;
}

.hero h1 {
  font-size: 48px;
  line-height: 1.28;
  margin-bottom: 24px;
}
.big-number{
  background: linear-gradient(90deg, var(--g-red), var(--g-blue));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero h1 span {
  background: linear-gradient(90deg, var(--g-blue), var(--g-red), var(--g-yellow), var(--g-green));
  background-size: 300% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: logoGradient 8s linear infinite;
}

.hero p {
  font-size: 18px;
  color: #475569;
  margin-bottom: 32px;
  line-height: 1.7;
}

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

.hero-features {
  display: flex;
  gap: 18px;
  margin-top: 28px;
  flex-wrap: wrap;
}

.hero-tag {
  padding: 8px 18px;
  border-radius: 999px;
  background: rgba(255,255,255,.78);
  color: #334155;
  font-size: 14px;
  font-weight: 500;
  box-shadow: 0 2px 12px rgba(0,0,0,.06);
}

.hero-visual {
  position: relative;
  height: 340px;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(66,133,244,.18);
}

.hero-visual-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 20%, rgba(66,133,244,.55), transparent 24%),
    radial-gradient(circle at 80% 10%, rgba(234,67,53,.55), transparent 24%),
    radial-gradient(circle at 10% 80%, rgba(251,188,5,.55), transparent 24%),
    radial-gradient(circle at 90% 75%, rgba(52,168,83,.55), transparent 24%),
    linear-gradient(135deg, #4285F4, #EA4335, #FBBC05, #34A853);
  background-size: 400% 400%;
  animation: heroGradient 12s ease infinite;
}

@keyframes heroGradient {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.hero-visual-content {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 24px;
  font-weight: 700;
  text-shadow: 0 2px 14px rgba(0,0,0,.35);
}

/*====货源规模模块【新增】====*/
.stock-section{
  padding:20px 0;
}
.stock-wrap{
  display:grid;
  grid-template-columns: repeat(4,1fr);
  gap:24px;
  max-width:1000px;
  margin:0 auto 24px;
}
.stock-item{
  background:var(--card-bg);
  border-radius:20px;
  text-align:center;
  padding:32px 16px;
  box-shadow:0 10px 30px rgba(66,133,244,.08);
  border:1px solid rgba(255,255,255,0.8);
  transition:0.3s ease;
}
.stock-item:hover{
  transform:translateY(-6px);
}
.stock-num{
  font-size:42px;
  font-weight:800;
  background: linear-gradient(135deg,var(--g-blue),var(--g-red));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  margin-bottom:8px;
}
.stock-label{
  font-size:16px;
  color:#475569;
}
.stock-desc{
  text-align:center;
  font-size:17px;
  color:#334155;
  max-width:800px;
  margin:0 auto;
}

/* 平台模块 */
.platform-section {
  padding: 64px 0;
}

.section-title {
  text-align: center;
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 48px;
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 18px;
}

.platform-card {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,.8);
  border-radius: 16px;
  padding: 20px 12px;
  text-align: center;
  box-shadow: 0 8px 24px rgba(0,0,0,.06);
  transition: .25s ease;
}
.platform-card:hover {
  transform: translateY(-4px);
  border-color: rgba(66,133,244,.35);
}
.platform-svg {
  width:48px;
  height:48px;
  margin:0 auto 10px;
}
.platform-name {
  font-weight:600;
  color:#334155;
  font-size:15px;
}

/* 优势 */
.advantage-section {
  padding: 80px 0;
}

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.advantage-card {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,.85);
  border-radius: 20px;
  padding: 32px;
  box-shadow: 0 12px 32px rgba(0,0,0,.08);
  transition: .3s ease;
  position: relative;
  overflow: hidden;
}

.advantage-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 5px;
  height: 100%;
  background: linear-gradient(180deg, var(--g-blue), var(--g-green));
}

.advantage-card:hover {
  transform: translateY(-8px);
  border-color: rgba(66,133,244,.45);
}

.advantage-card h3 {
  font-size: 20px;
  margin-bottom: 12px;
  color: #1e293b;
}

.advantage-card p {
  color: #475569;
  line-height: 1.7;
}

.icon-circle {
  width: 48px;
  height: 48px;
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 24px;
  color: white;
}

.icon-blue { background: linear-gradient(135deg, var(--g-blue), #64a0fc); }
.icon-red { background: linear-gradient(135deg, var(--g-red), #ff7668); }
.icon-yellow { background: linear-gradient(135deg, var(--g-yellow), #ffd166); }
.icon-green { background: linear-gradient(135deg, var(--g-green), #56d480); }

/* 货源类目 */
.category-section {
  padding: 72px 0;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.category-card {
  height: 220px;
  border-radius: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 28px;
  font-weight: 800;
  letter-spacing: 1px;
  box-shadow: 0 12px 40px rgba(0,0,0,.12);
  transition: .3s ease;
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 10% 10%, rgba(255,255,255,.22), transparent 30%);
}

.category-male {
  background:
    radial-gradient(circle at 10% 10%, rgba(255,255,255,.28), transparent 28%),
    linear-gradient(135deg, var(--g-blue), #64a0fc);
}

.category-female {
  background:
    radial-gradient(circle at 10% 10%, rgba(255,255,255,.28), transparent 28%),
    linear-gradient(135deg, var(--g-red), #ff7668);
}

.category-card:hover {
  transform: translateY(-6px) scale(1.02);
}

/* 二维码并排区域 */
.qrcode-section {
  padding: 72px 0;
}

.qrcode-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 760px;
  margin: 0 auto;
}

.qrcode-card {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,.85);
  border-radius: 20px;
  padding: 28px;
  text-align: center;
  box-shadow: 0 12px 32px rgba(0,0,0,.08);
  transition: .3s ease;
}

.qrcode-card:hover {
  transform: translateY(-6px);
  border-color: rgba(66,133,244,.35);
}

.qrcode-box {
  width: 170px;
  height: 170px;
  margin: 0 auto 16px;
  border-radius: 16px;
  background:
    radial-gradient(circle at 12% 12%, rgba(66,133,244,.18), transparent 28%),
    radial-gradient(circle at 88% 8%, rgba(234,67,53,.18), transparent 28%),
    linear-gradient(135deg, #f7f9ff, #eaf4ff);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #64748b;
  font-size: 14px;
  font-weight: 500;
  border: 1px dashed rgba(66,133,244,.35);
}

.qrcode-card h4 {
  font-size: 18px;
  margin-bottom: 8px;
  color: #1e293b;
}

.qrcode-card p {
  color: #475569;
  font-size: 15px;
}

/* CTA */
.cta-section {
  padding: 72px 0;
}

.cta-box {
  position: relative;
  border-radius: 24px;
  padding: 56px 24px;
  text-align: center;
  color: white;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(66,133,244,.25);
}

.cta-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 15% 15%, rgba(255,255,255,.25), transparent 28%),
    radial-gradient(circle at 85% 10%, rgba(255,255,255,.25), transparent 28%),
    linear-gradient(135deg, var(--g-blue), var(--g-red), var(--g-yellow), var(--g-green));
  background-size: 300% 300%;
  animation: heroGradient 10s ease infinite;
}

.cta-content {
  position: relative;
  z-index: 1;
}

.cta-box h2 {
  font-size: 34px;
  margin-bottom: 16px;
}

.cta-box p {
  font-size: 17px;
  margin-bottom: 28px;
  opacity: .92;
}

.cta-box .btn {
  background: white;
  color: var(--g-blue);
  padding: 12px 32px;
  font-size: 16px;
}

.cta-box .btn:hover {
  background: #f8fafc;
  box-shadow: 0 8px 24px rgba(0,0,0,.15);
}

/* 底部 */
footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 56px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-bottom: 40px;
}

.footer-col h4 {
  color: #f1f5f9;
  margin-bottom: 18px;
  font-size: 17px;
}

.footer-col a {
  display: block;
  color: #94a3b8;
  text-decoration: none;
  margin-bottom: 10px;
  transition: .2s ease;
}

.footer-col a:hover {
  color: var(--g-blue);
}

.copyright {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid #1e293b;
  font-size: 14px;
}

/* 响应式 */
@media (max-width: 1100px) {
  .platform-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .stock-wrap{
    grid-template-columns: repeat(2,1fr);
  }
  .advantage-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-menu, .btn-group {
    display: none;
  }

  .mobile-menu-btn {
    display: block;
  }

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

  .hero h1 {
    font-size: 32px;
  }
  .stock-num{
    font-size:34px;
  }
  .platform-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .qrcode-row {
    grid-template-columns: 1fr;
  }

  .qrcode-box {
    width: 140px;
    height: 140px;
  }

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