/* ==========================================================
   布料易官网 共享组件 (common.css)
   玻璃拟态导航 / 现代footer / 按钮 / 卡片 / 板块标题
   ========================================================== */

/* ==================== 布局容器 ==================== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
  box-sizing: border-box;
}

.section {
  padding: var(--section-pad) 0;
}

.section-title {
  text-align: center;
  margin-bottom: 40px;
}

.section-title h2 {
  font-size: var(--fs-h2);
  font-weight: 700;
  color: var(--text-primary);
}

.section-title p {
  color: var(--text-muted);
  font-size: var(--fs-body);
  margin-top: 10px;
}

/* ==================== 玻璃拟态导航 ==================== */
.modern-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .86);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: box-shadow .3s ease;
}

.modern-nav.scrolled {
  box-shadow: var(--shadow-nav);
}

.modern-nav .nav-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-sizing: border-box;
}

.modern-nav .nav-logo img {
  height: 38px;
  display: block;
}

.modern-nav .nav-menu {
  display: flex;
  gap: 6px;
}

.modern-nav .nav-menu a {
  padding: 8px 16px;
  font-size: 15px;
  color: var(--text-secondary);
  border-radius: var(--radius-pill);
  transition: all .25s ease;
}

.modern-nav .nav-menu a:hover {
  color: var(--brand);
  background: var(--brand-light);
}

.modern-nav .nav-menu a.active {
  color: #fff;
  background: var(--brand);
  font-weight: 600;
}

.modern-nav .nav-cta {
  padding: 8px 22px;
  font-size: 14px;
  color: #fff;
  background: var(--brand);
  border-radius: var(--radius-pill);
  transition: all .25s ease;
}

.modern-nav .nav-cta:hover {
  background: var(--brand-dark);
  box-shadow: var(--shadow-hover);
}

/* 移动端菜单按钮 */
.modern-nav .nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.modern-nav .nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  margin: 5px 0;
  border-radius: 2px;
}

/* ==================== 按钮 ==================== */
.btn-primary {
  display: inline-block;
  padding: 12px 36px;
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  background: var(--brand-gradient);
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(56, 107, 243, .35);
  transition: all .25s ease;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(56, 107, 243, .45);
}

.btn-ghost {
  display: inline-block;
  padding: 12px 36px;
  font-size: 16px;
  font-weight: 600;
  color: var(--brand);
  background: transparent;
  border: 1.5px solid var(--brand);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all .25s ease;
}

.btn-ghost:hover {
  background: var(--brand-light);
  transform: translateY(-2px);
}

.btn-ghost-white {
  display: inline-block;
  padding: 12px 36px;
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  background: rgba(255, 255, 255, .12);
  border: 1.5px solid rgba(255, 255, 255, .6);
  backdrop-filter: blur(6px);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all .25s ease;
}

.btn-ghost-white:hover {
  background: rgba(255, 255, 255, .22);
  transform: translateY(-2px);
}

/* ==================== 卡片 ==================== */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 28px;
  box-sizing: border-box;
  transition: transform .25s ease, box-shadow .25s ease;
}

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

.card h3 {
  font-size: var(--fs-h3);
  margin: 12px 0 8px;
}

.card p {
  color: var(--text-secondary);
  font-size: var(--fs-small);
  line-height: 1.8;
  margin: 0;
}

.card .card-icon {
  font-size: 40px;
  line-height: 1;
}

/* ==================== 滚动淡入动画 ==================== */
.fade-item {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s ease;
}

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

/* ==================== 现代 footer ==================== */
.modern-footer {
  background: var(--bg-footer);
  color: #c8cfdb;
  padding: 48px 0 0;
}

.modern-footer .footer-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  justify-content: space-between;
  box-sizing: border-box;
}

.modern-footer .f-col h4 {
  color: #fff;
  font-size: 16px;
  margin-bottom: 14px;
}

.modern-footer .f-col a {
  display: block;
  font-size: 13px;
  color: #9aa3b2;
  line-height: 2;
  transition: color .2s;
}

.modern-footer .f-col a:hover {
  color: #fff;
}

.modern-footer .f-contact .f-phone {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.modern-footer .f-contact .f-phone-label {
  font-size: 13px;
  color: #9aa3b2;
}

.modern-footer .f-qrcodes {
  display: flex;
  gap: 14px;
  margin-top: 14px;
}

.modern-footer .f-qrcodes .qr {
  text-align: center;
  font-size: 12px;
  color: #9aa3b2;
}

.modern-footer .f-qrcodes .qr img {
  width: 84px;
  height: 84px;
  border-radius: var(--radius-sm);
  display: block;
  margin-bottom: 4px;
}

.modern-footer .f-copyright {
  border-top: 1px solid rgba(255, 255, 255, .08);
  margin-top: 40px;
  padding: 16px 20px;
  text-align: center;
  font-size: 12px;
  color: #79828f;
}

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
  .section {
    padding: 40px 0;
  }

  /* 导航移动端 */
  .modern-nav .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    box-shadow: var(--shadow-nav);
    flex-direction: column;
    padding: 10px 20px 16px;
  }

  .modern-nav .nav-menu.open {
    display: flex;
  }

  .modern-nav .nav-menu a {
    padding: 12px 8px;
    border-radius: var(--radius-sm);
  }

  .modern-nav .nav-cta {
    display: none;
  }

  .modern-nav .nav-toggle {
    display: block;
  }

  /* footer 移动端 */
  .modern-footer .footer-inner {
    flex-direction: column;
    gap: 28px;
  }
}