/* ============================================================
   慧学教育 · 收款站点 · 前台样式
   ============================================================ */

:root {
  --primary:     #1a5276;
  --primary-d:   #154360;
  --accent:      #e67e22;
  --accent-d:    #ca6f1e;
  --success:     #1e8449;
  --text:        #2c3e50;
  --text-muted:  #7f8c8d;
  --bg:          #f4f6f8;
  --border:      #dde1e7;
  --white:       #ffffff;
  --radius:      8px;
  --shadow-sm:   0 2px 8px rgba(0,0,0,.08);
  --shadow-md:   0 4px 20px rgba(0,0,0,.12);
  --transition:  .2s ease;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
}

a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }

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

/* ── 顶部导航 ── */
.site-header {
  background: var(--primary);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 12px rgba(0,0,0,.2);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 20px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: .5px;
}

.site-logo .logo-icon {
  width: 36px;
  height: 36px;
  background: var(--accent);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.site-logo:hover { color: #fff; }

.header-contact {
  color: rgba(255,255,255,.8);
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.header-contact span { color: #fff; font-weight: 600; }

/* ── Hero 横幅 ── */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, #2e86c1 60%, #1a5276 100%);
  color: #fff;
  padding: 60px 20px 50px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

.hero h1 {
  font-size: clamp(24px, 5vw, 38px);
  font-weight: 800;
  margin-bottom: 12px;
  position: relative;
}

.hero p {
  font-size: clamp(14px, 2.5vw, 17px);
  color: rgba(255,255,255,.85);
  max-width: 560px;
  margin: 0 auto 28px;
  position: relative;
}

.hero .notice-bar {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 50px;
  padding: 8px 20px;
  font-size: 13px;
  color: rgba(255,255,255,.9);
  position: relative;
}

/* ── 容器 ── */
.container {
  max-width: 1080px;
  margin: 0 auto;
}

/* ── 区块标题 ── */
.section-head {
  text-align: center;
  padding: 40px 20px 24px;
}

.section-head h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}

.section-head .line {
  display: inline-block;
  width: 40px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
  margin: 6px auto 0;
}

/* ── 商品网格 ── */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  padding: 0 20px 48px;
}

.product-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
  cursor: pointer;
}

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

.product-card .card-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.product-card .card-img-placeholder {
  width: 100%;
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  letter-spacing: 1px;
}

.product-card .card-body {
  padding: 16px 18px;
}

.product-card .category-tag {
  display: inline-block;
  background: rgba(26,82,118,.1);
  color: var(--primary);
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 3px;
  margin-bottom: 8px;
  font-weight: 600;
}

.product-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 5px;
  line-height: 1.4;
}

.product-card .subtitle {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.product-card .features-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-bottom: 14px;
}

.product-card .feat-tag {
  font-size: 11px;
  background: #eaf2f8;
  color: var(--primary);
  padding: 2px 8px;
  border-radius: 3px;
}

.product-card .card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border);
  padding-top: 12px;
}

.price-block .price-now {
  font-size: 22px;
  font-weight: 800;
  color: var(--accent);
}

.price-block .price-now sup {
  font-size: 14px;
  font-weight: 700;
  vertical-align: super;
}

.price-block .price-orig {
  font-size: 12px;
  color: var(--text-muted);
  text-decoration: line-through;
  margin-left: 4px;
}

.price-block .sales-count {
  font-size: 12px;
  color: var(--text-muted);
}

.btn-enroll {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition);
}

.btn-enroll:hover { background: var(--accent-d); }

/* ── 商品详情 ── */
.product-detail {
  padding: 32px 20px;
}

.detail-grid {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 28px;
  align-items: start;
}

@media (max-width: 768px) {
  .detail-grid { grid-template-columns: 1fr; }
}

.detail-img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.detail-body { }

.detail-category {
  font-size: 12px;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 8px;
}

.detail-title {
  font-size: 24px;
  font-weight: 800;
  color: var(--text);
  line-height: 1.3;
  margin-bottom: 8px;
}

.detail-subtitle {
  color: var(--text-muted);
  margin-bottom: 16px;
}

.detail-features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.detail-feat {
  background: #eaf2f8;
  color: var(--primary);
  font-size: 13px;
  padding: 4px 12px;
  border-radius: 4px;
  font-weight: 500;
}

.detail-price-box {
  background: #fef9f0;
  border: 1px solid #fcd5a0;
  border-radius: var(--radius);
  padding: 18px 20px;
  margin-bottom: 20px;
}

.detail-price-box .price-label { font-size: 13px; color: var(--text-muted); margin-bottom: 4px; }
.detail-price-box .price-main {
  font-size: 36px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}
.detail-price-box .price-main sup { font-size: 20px; vertical-align: super; }
.detail-price-box .price-orig { font-size: 14px; color: var(--text-muted); text-decoration: line-through; }

.btn-buy {
  width: 100%;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 14px;
  font-size: 17px;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--transition);
  margin-bottom: 12px;
}

.btn-buy:hover { background: var(--accent-d); }

.security-tips {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  font-size: 12px;
  color: var(--text-muted);
}

.security-tips span { display: flex; align-items: center; gap: 4px; }

.detail-desc {
  background: var(--white);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  margin-top: 24px;
}

.detail-desc h4 { font-size: 16px; margin-bottom: 14px; color: var(--text); border-bottom: 2px solid var(--accent); padding-bottom: 8px; display: inline-block; }
.detail-desc p { color: var(--text); margin-bottom: 12px; }
.detail-desc ul { padding-left: 20px; color: var(--text); }
.detail-desc ul li { margin-bottom: 6px; }
.detail-desc strong { color: var(--primary); }

/* ── 结账 / 支付 ── */
.checkout-wrap {
  max-width: 680px;
  margin: 36px auto;
  padding: 0 20px;
}

.checkout-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  margin-bottom: 20px;
}

.checkout-card-head {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  font-weight: 700;
  font-size: 15px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.checkout-card-head .step-num {
  width: 24px; height: 24px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700;
}

.checkout-card-body { padding: 20px 24px; }

.order-summary-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px dashed var(--border);
}

.order-summary-row:last-child { border-bottom: none; }
.order-summary-row .label { color: var(--text-muted); font-size: 14px; }
.order-summary-row .value { font-weight: 600; color: var(--text); }
.order-summary-row .value.price { color: var(--accent); font-size: 22px; font-weight: 800; }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 14px; color: var(--text); margin-bottom: 6px; font-weight: 500; }
.form-group label .req { color: #e74c3c; margin-left: 2px; }
.form-control {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  color: var(--text);
  background: #fff;
  transition: border-color var(--transition), box-shadow var(--transition);
  font-family: inherit;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,82,118,.1);
}

/* 支付方式 */
.channel-list { display: flex; flex-direction: column; gap: 12px; }

.channel-item {
  display: flex;
  align-items: center;
  gap: 14px;
  border: 2px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}

.channel-item:hover { border-color: var(--primary); background: #f0f5fb; }
.channel-item.active { border-color: var(--primary); background: #eaf2f8; }
.channel-item input[type=radio] { display: none; }

.channel-icon {
  width: 40px; height: 40px;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.channel-icon.alipay  { background: #1677ff; color: #fff; }
.channel-icon.wechat  { background: #07c160; color: #fff; }
.channel-icon.tenpay  { background: #ffd100; color: #333; }

.channel-info .channel-name { font-weight: 600; font-size: 15px; }
.channel-info .channel-desc { font-size: 12px; color: var(--text-muted); }
.channel-check { margin-left: auto; width: 20px; height: 20px; border: 2px solid var(--border); border-radius: 50%; transition: all var(--transition); }
.channel-item.active .channel-check { border-color: var(--primary); background: var(--primary); box-shadow: inset 0 0 0 4px #fff; }

.btn-submit {
  width: 100%;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 15px;
  font-size: 17px;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--transition);
}

.btn-submit:hover { background: var(--accent-d); }
.btn-submit:disabled { background: #bdc3c7; cursor: not-allowed; }

/* ── 结果页 ── */
.result-wrap {
  max-width: 520px;
  margin: 60px auto;
  text-align: center;
  padding: 0 20px;
}

.result-icon {
  width: 80px; height: 80px;
  border-radius: 50%;
  margin: 0 auto 20px;
  display: flex; align-items: center; justify-content: center;
  font-size: 40px;
}

.result-icon.success { background: #e8f8f0; }
.result-icon.pending { background: #fff8e1; }
.result-icon.fail    { background: #fdecea; }

.result-title { font-size: 22px; font-weight: 800; margin-bottom: 8px; }
.result-subtitle { color: var(--text-muted); font-size: 14px; margin-bottom: 24px; }

.result-info {
  background: var(--white);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  text-align: left;
  margin-bottom: 24px;
}

.result-info-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  font-size: 14px;
  border-bottom: 1px dashed var(--border);
}

.result-info-row:last-child { border-bottom: none; }
.result-info-row .lbl { color: var(--text-muted); }
.result-info-row .val { font-weight: 600; }

/* ── 页脚 ── */
.site-footer {
  background: #2c3e50;
  color: rgba(255,255,255,.6);
  text-align: center;
  padding: 24px 20px;
  font-size: 13px;
  margin-top: 40px;
}

.site-footer a { color: rgba(255,255,255,.7); }
.site-footer a:hover { color: #fff; }

/* ── 通用工具 ── */
.text-center { text-align: center; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }

/* ── 响应式 ── */
@media (max-width: 600px) {
  .products-grid { grid-template-columns: 1fr; gap: 14px; padding: 0 14px 36px; }
  .hero { padding: 40px 16px 36px; }
  .checkout-card-body { padding: 16px; }
  .detail-title { font-size: 20px; }
}