/* Reset & Base */
* {margin: 0; padding: 0; box-sizing: border-box;}
html {font-size: 16px;}
body {
  font-family: 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Arial', sans-serif;
  background: linear-gradient(135deg, #e9eafc 0%, #b6c1e6 40%, #7b8bd1 100%);
  color: #222;
  position: relative;
  min-height: 100vh;
}
body::before {
  content: '';
  position: fixed;
  left: 0; top: 0; right: 0; bottom: 0;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(circle at 20% 30%, rgba(255,255,255,0.25) 0, rgba(255,255,255,0) 40%),
              radial-gradient(circle at 80% 70%, rgba(255,255,255,0.18) 0, rgba(255,255,255,0) 50%),
              radial-gradient(circle at 60% 10%, rgba(123,139,209,0.10) 0, rgba(123,139,209,0) 60%);
}
main, header, footer, section, .za4bcdcontainer {
  position: relative;
  z-index: 1;
}
img {max-width: 100%; display: block;}
.za4bcdcontainer {max-width: 1200px; margin: 0 auto; padding: 0 16px;}

/* Navbar */
.za4bcdnavbar {background: #fff; box-shadow: 0 2px 8px rgba(0,0,0,0.05); position: sticky; top: 0; z-index: 100;}
.za4bcdnav-container {display: flex; align-items: center; justify-content: space-between; height: 64px;}
.za4bcdsite-title {font-size: 1.8rem; font-weight: bold; color: #2d8cf0; letter-spacing: 2px;}
.za4bcdnav-menu a {margin-left: 24px; color: #333; text-decoration: none; font-size: 1rem; transition: color 0.2s;}
.za4bcdnav-menu a:hover {color: #2d8cf0;}

/* Hamburger menu for mobile */
.za4bcdnav-toggle {display: none;}
.za4bcdnav-toggle-label {display: none; cursor: pointer; width: 36px; height: 36px; flex-direction: column; justify-content: center; align-items: center;}
.za4bcdnav-toggle-label span {display: block; width: 28px; height: 4px; margin: 4px 0; background: #2d8cf0; border-radius: 2px; transition: 0.3s;}

/* Banner */
.za4bcdbanner {background: linear-gradient(90deg, #2d8cf0 60%, #57c1eb 100%); color: #fff; padding: 48px 0 32px 0;}
.za4bcdbanner-content {display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap;}
.za4bcdbanner-text {max-width: 600px;}
.za4bcdbanner-text h1 {font-size: 2.5rem; margin-bottom: 16px;}
.za4bcdbanner-text p {font-size: 1.2rem; margin-bottom: 16px;}
.za4bcdbanner-keywords {display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 24px;}
.za4bcdbanner-keywords li {background: rgba(255,255,255,0.2); border-radius: 16px; padding: 6px 16px; font-size: 1rem;}
.za4bcdcta-btn {background: #fff; color: #2d8cf0; border: none; border-radius: 24px; padding: 12px 32px; font-size: 1.1rem; font-weight: bold; cursor: pointer; box-shadow: 0 2px 8px rgba(0,0,0,0.08); transition: background 0.2s, color 0.2s;}
.za4bcdcta-btn:hover {background: #2d8cf0; color: #fff;}
.za4bcdbanner-img {max-width: 320px; margin-left: 32px;}

/* Features */
.za4bcdfeatures {padding: 48px 0 32px 0;}
.za4bcdfeatures h2 {font-size: 2rem; margin-bottom: 32px; text-align: center;}
.za4bcdfeatures-list {display: flex; flex-wrap: wrap; gap: 24px; justify-content: center;}
.za4bcdfeature-card {background: #fff; border-radius: 16px; box-shadow: 0 2px 12px rgba(45,140,240,0.08); padding: 32px 24px; width: 240px; text-align: center; transition: transform 0.2s;}
.za4bcdfeature-card:hover {transform: translateY(-8px) scale(1.03);}
.za4bcdfeature-card img {width: 48px; height: 48px; margin-bottom: 16px;}
.za4bcdfeature-card h3 {font-size: 1.2rem; margin-bottom: 8px; color: #2d8cf0;}
.za4bcdfeature-card p {font-size: 1rem; color: #555;}
.za4bcdfeatures-desc {margin-bottom: 20px;}

/* Products */
.za4bcdproducts {padding: 48px 0 32px 0; background: #f7fafc;}
.za4bcdproducts h2 {font-size: 2rem; margin-bottom: 32px; text-align: center;}
.za4bcdproduct-cards {display: flex; flex-wrap: wrap; gap: 24px; justify-content: center;}
.za4bcdproduct-card {background: #fff; border-radius: 16px; box-shadow: 0 2px 12px rgba(45,140,240,0.08); padding: 32px 24px; width: 30%; min-width: 240px; max-width: 340px; text-align: center; transition: transform 0.2s; position: relative; margin-bottom: 0;}
.za4bcdproduct-card:hover {transform: translateY(-8px) scale(1.03);}
.za4bcdproduct-card img {width: 64px; height: 64px; margin-bottom: 16px;}
.za4bcdproduct-card h3 {font-size: 1.2rem; margin-bottom: 8px; color: #2d8cf0;}
.za4bcdproduct-card p {font-size: 1rem; color: #555; margin-bottom: 12px;}
.za4bcdprice {display: block; font-size: 1.1rem; color: #e67e22; font-weight: bold; margin-bottom: 16px;}
.za4bcdbuy-btn {background: #2d8cf0; color: #fff; border: none; border-radius: 24px; padding: 10px 28px; font-size: 1rem; font-weight: bold; cursor: pointer; transition: background 0.2s;}
.za4bcdbuy-btn:hover {background: #57c1eb;}
.za4bcdproducts-desc {margin-bottom: 20px;}

/* Process */
.za4bcdprocess {padding: 48px 0 32px 0;}
.za4bcdprocess h2 {font-size: 2rem; margin-bottom: 32px; text-align: center;}
.za4bcdprocess-steps {display: flex; flex-wrap: wrap; gap: 24px; justify-content: center;}
.za4bcdstep-card {background: #fff; border-radius: 16px; box-shadow: 0 2px 12px rgba(45,140,240,0.08); padding: 32px 24px; width: 240px; text-align: center; transition: transform 0.2s; margin-bottom: 0;}
.za4bcdstep-card:hover {transform: translateY(-8px) scale(1.03);}
.za4bcdstep-num {display: inline-block; background: #2d8cf0; color: #fff; border-radius: 50%; width: 36px; height: 36px; line-height: 36px; font-size: 1.2rem; margin-bottom: 8px;}
.za4bcdstep-card p {font-size: 1rem; color: #555;}
.za4bcdprocess-desc {margin-bottom: 20px;}

/* Contact */
.za4bcdcontact {padding: 48px 0 32px 0; background: #f7fafc;}
.za4bcdcontact h2 {font-size: 2rem; margin-bottom: 32px; text-align: center;}
.za4bcdcontact-info {display: flex; flex-wrap: wrap; gap: 24px; justify-content: center;}
.za4bcdcontact-card {background: #fff; border-radius: 16px; box-shadow: 0 2px 12px rgba(45,140,240,0.08); padding: 32px 24px; width: 260px; text-align: center;}
.za4bcdcontact-card img {width: 48px; height: 48px; margin-bottom: 16px;}
.za4bcdcontact-wechat, .za4bcdcontact-email {color: #2d8cf0; font-weight: bold;}
.za4bcdcontact-desc {margin-bottom: 20px;}

/* Footer */
.za4bcdfooter {background: #2d8cf0; color: #fff; text-align: center; padding: 24px 0; font-size: 1rem; margin-top: 32px;}

/* Notice 公告 */
.za4bcdnotice {background: #fffbe6; padding: 32px 0 16px 0; border-bottom: 1px solid #f5e9c6;}
.za4bcdnotice h2 {font-size: 1.5rem; margin-bottom: 16px; text-align: center; color: #e67e22;}
.za4bcdnotice-list {list-style: none; display: flex; flex-wrap: wrap; gap: 18px; justify-content: center;}
.za4bcdnotice-list li {font-size: 1.05rem; color: #b26a00; background: #fff7d6; border-radius: 12px; padding: 8px 20px; display: flex; align-items: center; box-shadow: 0 1px 4px rgba(230, 126, 34, 0.07);}
.za4bcdnotice-icon {margin-right: 8px; font-size: 1.2rem;}

/* FAQ */
.za4bcdfaq {padding: 48px 0 32px 0; background: #f7fafc;}
.za4bcdfaq h2 {font-size: 2rem; margin-bottom: 32px; text-align: center;}
.za4bcdfaq-list {display: flex; flex-wrap: wrap; gap: 24px; justify-content: center; max-width: 1200px; margin: 0 auto;}
.za4bcdfaq-item {background: #fff; border-radius: 16px; box-shadow: 0 2px 12px rgba(45,140,240,0.08); padding: 32px 24px; width: 240px; text-align: left; transition: transform 0.2s; margin-bottom: 0;}
.za4bcdfaq-item:hover {transform: translateY(-8px) scale(1.03);}
.za4bcdfaq-item h3 {font-size: 1.1rem; color: #2d8cf0; margin-bottom: 6px;}
.za4bcdfaq-item p {font-size: 1rem; color: #555;}
.za4bcdfaq-desc {margin-bottom: 20px;}

/* Reviews 用户评价 */
.za4bcdreviews {padding: 48px 0 32px 0;}
.za4bcdreviews h2 {font-size: 2rem; margin-bottom: 32px; text-align: center;}
.za4bcdreview-list {display: flex; flex-wrap: wrap; gap: 24px; justify-content: center;}
.za4bcdreview-card {background: #fff; border-radius: 16px; box-shadow: 0 2px 12px rgba(45,140,240,0.08); padding: 28px 20px; width: 260px; text-align: center; display: flex; flex-direction: column; align-items: center;}
.za4bcdreview-card img {width: 48px; height: 48px; border-radius: 50%; margin-bottom: 12px;}
.za4bcdreview-text {font-size: 1rem; color: #444; margin-bottom: 10px;}
.za4bcdreview-user {font-size: 0.95rem; color: #888;}
.za4bcdreviews-desc {margin-bottom: 20px;}

/* About Us 关于我们 */
.za4bcdaboutus {margin-top: 32px; background: #f7fafc; border-radius: 12px; padding: 18px 24px;}
.za4bcdaboutus h3 {font-size: 1.1rem; color: #2d8cf0; margin-bottom: 6px;}
.za4bcdaboutus p {font-size: 1rem; color: #555;}

/* 新增产品卡片适配 */
.za4bcdproduct-card img {object-fit: contain;}

/* Notice Cards */
.za4bcdnotice-cards {display: flex; flex-wrap: wrap; gap: 24px; justify-content: center; margin-top: 12px;}
.za4bcdnotice-card {background: #fff; border-radius: 14px; box-shadow: 0 2px 10px rgba(230,126,34,0.10); display: flex; align-items: center; padding: 18px 28px; min-width: 260px; max-width: 360px; margin-bottom: 0; transition: box-shadow 0.2s;}
.za4bcdnotice-card:hover {box-shadow: 0 4px 18px rgba(230,126,34,0.16);}
.za4bcdnotice-card .za4bcdnotice-icon {font-size: 1.5rem; margin-right: 14px; color: #e67e22;}
.za4bcdnotice-content {font-size: 1.08rem; color: #b26a00;}

/* Responsive */
@media (max-width: 900px) {
    .za4bcdbanner-content, .za4bcdfeatures-list, .za4bcdproduct-cards, .za4bcdprocess-steps, .za4bcdcontact-info {
        flex-direction: column;
        align-items: center;
    }
    .za4bcdbanner-img {margin-left: 0; margin-top: 24px;}
    .za4bcdnotice-list, .za4bcdreview-list {
        flex-direction: column;
        align-items: center;
    }
    .za4bcdnotice-cards {flex-direction: column; align-items: center;}
    .za4bcdnotice-card {width: 90%; min-width: unset; max-width: unset;}
    .za4bcdfaq-list {flex-direction: column; align-items: center;}
    .za4bcdfaq-item {width: 100%; max-width: 600px; padding: 24px 12px;}
    .za4bcdfeature-card, .za4bcdstep-card, .za4bcdreview-card {width: 100%; max-width: 600px; padding: 24px 12px;}
    .za4bcdproduct-cards {gap: 16px;}
    .za4bcdnav-menu {position: absolute; top: 64px; left: 0; right: 0; background: #fff; box-shadow: 0 2px 8px rgba(0,0,0,0.08); flex-direction: column; align-items: flex-start; padding: 16px 0 8px 32px; display: none;}
    .za4bcdnav-menu a {margin: 12px 0; font-size: 1.1rem;}
    .za4bcdnav-toggle-label {display: flex; position: absolute; right: 16px; top: 16px; z-index: 101;}
    .za4bcdnav-toggle:checked + .za4bcdnav-toggle-label + .za4bcdnav-menu {display: flex;}
    .za4bcdnav-container {position: relative;}
}
@media (max-width: 600px) {
    html {font-size: 15px;}
    .za4bcdnav-container {flex-direction: column; height: auto; padding: 12px 0;}
    .za4bcdnav-menu {margin-top: 8px;}
    .za4bcdbanner {padding: 32px 0 16px 0;}
    .za4bcdfeatures, .za4bcdproducts, .za4bcdprocess, .za4bcdcontact {padding: 32px 0 16px 0;}
    .za4bcdfooter {font-size: 0.95rem;}
    .za4bcdfeature-card, .za4bcdstep-card, .za4bcdfaq-item, .za4bcdreview-card {width: 100%; max-width: 100%; padding: 18px 6px;}
}
@media (max-width: 1100px) {
  .za4bcdproduct-card {width: 45%;}
}
@media (max-width: 700px) {
  .za4bcdproduct-card {width: 90%;}
  .za4bcdproduct-cards {gap: 16px;}
}