/* ============ 全局样式 ============ */
* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --primary: #5b6cff;
  --primary-2: #8a5cff;
  --primary-3: #b14bff;
  --gradient: linear-gradient(135deg, #5b6cff 0%, #8a5cff 50%, #b14bff 100%);
  --gradient-soft: linear-gradient(135deg, #eef0ff 0%, #f5edff 100%);
  --text: #1a1f36;
  --text-2: #5a6072;
  --text-3: #8a90a3;
  --bg: #ffffff;
  --bg-soft: #f7f8fc;
  --border: #e8eaf3;
  --shadow-sm: 0 2px 8px rgba(91, 108, 255, 0.06);
  --shadow-md: 0 8px 24px rgba(91, 108, 255, 0.10);
  --shadow-lg: 0 16px 48px rgba(91, 108, 255, 0.18);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
}
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
    "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 通用按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 6px 18px rgba(138, 92, 255, 0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(138, 92, 255, 0.45); }
.btn-ghost {
  background: rgba(255,255,255,0.85);
  color: var(--primary);
  border: 1px solid rgba(91, 108, 255, 0.2);
}
.btn-ghost:hover { background: #fff; transform: translateY(-2px); }
.btn-outline {
  background: #fff;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}
.btn-outline:hover { background: var(--gradient); color: #fff; border-color: transparent; }
.btn-block { display: flex; width: 100%; padding: 14px 24px; font-size: 16px; }
.btn-lg { padding: 14px 28px; font-size: 16px; }

/* 章节通用 */
section { padding: 96px 0; }
.section-head { text-align: center; margin-bottom: 56px; }
.section-tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 999px;
  background: var(--gradient-soft);
  color: var(--primary);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 14px;
}
.section-title {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -.02em;
  margin-bottom: 12px;
}
.section-sub {
  color: var(--text-2);
  font-size: 16px;
  max-width: 640px;
  margin: 0 auto;
}

/* ============ 顶部导航 ============ */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  background: rgba(255,255,255,0.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
}
.nav-logo .logo-mark {
  width: 32px; height: 32px;
  border-radius: 8px;
  background: var(--gradient);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 800; font-size: 16px;
  box-shadow: 0 4px 10px rgba(138,92,255,0.35);
}
.nav-menu {
  display: flex; gap: 8px;
}
.nav-menu a {
  padding: 8px 16px;
  border-radius: 8px;
  color: var(--text-2);
  font-size: 15px;
  transition: color .2s, background .2s;
}
.nav-menu a:hover { color: var(--primary); background: var(--gradient-soft); }
.nav-menu a.active { color: var(--primary); background: var(--gradient-soft); font-weight: 500; }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  border-radius: 8px;
  align-items: center; justify-content: center;
}
.nav-toggle span {
  display: block; width: 22px; height: 2px;
  background: var(--text); position: relative;
}
.nav-toggle span::before, .nav-toggle span::after {
  content: ""; position: absolute; left: 0; width: 22px; height: 2px; background: var(--text);
  transition: transform .25s ease;
}
.nav-toggle span::before { top: -7px; }
.nav-toggle span::after { top: 7px; }
.nav-open .nav-toggle span { background: transparent; }
.nav-open .nav-toggle span::before { transform: translateY(7px) rotate(45deg); }
.nav-open .nav-toggle span::after { transform: translateY(-7px) rotate(-45deg); }

/* ============ Hero（首页大标题） ============ */
.hero {
  position: relative;
  padding: 160px 0 120px;
  overflow: hidden;
  background:
    radial-gradient(800px 400px at 80% -10%, rgba(177,75,255,0.18), transparent 60%),
    radial-gradient(700px 380px at 10% 10%, rgba(91,108,255,0.18), transparent 60%),
    linear-gradient(180deg, #fafbff 0%, #ffffff 100%);
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 56px;
  align-items: center;
}
.hero-tag {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px;
  background: rgba(255,255,255,0.8);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 13px;
  color: var(--primary);
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}
.hero-tag .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--gradient);
}
.hero h1 {
  font-size: 52px;
  line-height: 1.15;
  letter-spacing: -.025em;
  font-weight: 800;
  margin-bottom: 20px;
}
.hero h1 .grad {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: 17px;
  color: var(--text-2);
  margin-bottom: 32px;
  max-width: 560px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* Hero 装饰 */
.hero-visual {
  position: relative;
  height: 420px;
}
.blob {
  position: absolute;
  border-radius: 36px;
  background: var(--gradient);
  box-shadow: var(--shadow-lg);
}
.blob-1 {
  width: 280px; height: 280px;
  top: 30px; left: 40px;
  transform: rotate(-8deg);
  opacity: .9;
}
.blob-2 {
  width: 200px; height: 200px;
  top: 90px; right: 20px;
  background: linear-gradient(135deg, #ffd86f 0%, #fc6f6f 100%);
  transform: rotate(12deg);
  box-shadow: 0 16px 48px rgba(252,111,111,0.3);
}
.float-card {
  position: absolute;
  background: #fff;
  border-radius: var(--radius-md);
  padding: 16px 20px;
  box-shadow: var(--shadow-md);
  display: flex; align-items: center; gap: 12px;
  font-size: 14px;
  animation: floaty 4s ease-in-out infinite;
}
.float-card .ic {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: var(--gradient-soft);
  display: flex; align-items: center; justify-content: center;
  color: var(--primary); font-weight: 700;
}
.fc-1 { top: 20px; right: 30px; }
.fc-2 { bottom: 60px; left: 20px; animation-delay: 1.2s; }
.fc-3 { bottom: 0; right: 80px; animation-delay: 2.4s; }
@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ============ 二级页面 Page Header ============ */
.page-header {
  position: relative;
  padding: 140px 0 80px;
  overflow: hidden;
  background:
    radial-gradient(700px 360px at 90% -10%, rgba(177,75,255,0.15), transparent 60%),
    radial-gradient(600px 320px at 0% 20%, rgba(91,108,255,0.18), transparent 60%),
    linear-gradient(180deg, #fafbff 0%, #ffffff 100%);
  text-align: center;
}
.page-header .crumb {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; color: var(--text-3);
  margin-bottom: 16px;
}
.page-header .crumb a { color: var(--text-2); }
.page-header .crumb a:hover { color: var(--primary); }
.page-header .crumb .sep { opacity: .5; }
.page-header h1 {
  font-size: 46px;
  font-weight: 800;
  letter-spacing: -.02em;
  margin-bottom: 16px;
}
.page-header h1 .grad {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.page-header p {
  color: var(--text-2);
  font-size: 17px;
  max-width: 680px;
  margin: 0 auto;
}

/* ============ 核心服务预览（亮点） ============ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}
.feature-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: var(--gradient-soft);
  color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.feature-card h3 { font-size: 18px; margin-bottom: 8px; }
.feature-card p { color: var(--text-2); font-size: 14px; }

/* ============ 公司优势 ============ */
#advantages { background: var(--bg-soft); }
.adv-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.adv-card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform .25s;
}
.adv-card:hover { transform: translateY(-4px); }
.adv-icon {
  width: 64px; height: 64px;
  margin: 0 auto 18px;
  border-radius: 18px;
  background: var(--gradient);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 20px rgba(138,92,255,0.3);
}
.adv-card h4 { font-size: 17px; margin-bottom: 8px; }
.adv-card p { color: var(--text-2); font-size: 14px; }

/* ============ 服务产品 ============ */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.product-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  display: flex; flex-direction: column;
  transition: transform .25s, box-shadow .25s, border-color .25s;
  position: relative;
  overflow: hidden;
}
.product-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; height: 4px;
  background: var(--gradient);
  opacity: 0; transition: opacity .25s;
}
.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}
.product-card:hover::before { opacity: 1; }
.product-card.featured {
  background: linear-gradient(180deg, #fff 0%, #fbf9ff 100%);
  border-color: rgba(138,92,255,0.25);
}
.product-card.featured::before { opacity: 1; }
.product-badge {
  position: absolute;
  top: 18px; right: 18px;
  padding: 4px 10px;
  background: var(--gradient);
  color: #fff;
  font-size: 12px;
  border-radius: 999px;
}
.product-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: var(--gradient-soft);
  color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
  font-size: 22px;
}
.product-name {
  font-size: 19px; font-weight: 600;
  margin-bottom: 8px;
}
.product-desc {
  color: var(--text-2);
  font-size: 14px;
  margin-bottom: 22px;
  flex: 1;
}
.product-price {
  display: flex; align-items: baseline; gap: 4px;
  margin-bottom: 22px;
}
.product-price .num {
  font-size: 32px; font-weight: 700;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.product-price .unit { color: var(--text-3); font-size: 14px; }

/* ============ 服务详情页：详细介绍 ============ */
.detail-list { display: grid; gap: 64px; }
.detail-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.detail-item.reverse .detail-visual { order: -1; }
.detail-text .pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--gradient-soft);
  color: var(--primary);
  font-size: 12px;
  font-weight: 500;
  margin-bottom: 14px;
}
.detail-text h3 {
  font-size: 28px;
  letter-spacing: -.01em;
  margin-bottom: 12px;
}
.detail-text > p {
  color: var(--text-2);
  font-size: 15px;
  margin-bottom: 22px;
}
.detail-text ul {
  display: grid; gap: 12px;
  margin-bottom: 28px;
}
.detail-text li {
  display: flex; gap: 12px;
  font-size: 14px;
  color: var(--text-2);
}
.detail-text li::before {
  content: "✓";
  flex-shrink: 0;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--gradient-soft);
  color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700;
}
.detail-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.detail-visual {
  position: relative;
  border-radius: var(--radius-lg);
  padding: 40px;
  background: var(--gradient);
  color: #fff;
  min-height: 280px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.detail-visual::before {
  content: ""; position: absolute;
  width: 220px; height: 220px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  top: -60px; right: -60px;
}
.detail-visual::after {
  content: ""; position: absolute;
  width: 140px; height: 140px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  bottom: -40px; left: -40px;
}
.detail-visual .label { font-size: 13px; opacity: .85; position: relative; }
.detail-visual .price-big {
  font-size: 44px; font-weight: 800;
  margin: 6px 0 24px;
  position: relative;
}
.detail-visual .price-big small { font-size: 16px; font-weight: 500; opacity: .85; }
.detail-visual .stat-row {
  display: grid; grid-template-columns: 1fr 1fr; gap: 18px;
  position: relative;
}
.detail-visual .stat {
  background: rgba(255,255,255,0.14);
  border-radius: var(--radius-sm);
  padding: 14px;
  font-size: 13px;
}
.detail-visual .stat strong {
  display: block; font-size: 22px; font-weight: 700; margin-bottom: 2px;
}

/* ============ 价格对比表 ============ */
.price-table-wrap {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  overflow: hidden;
}
.price-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.price-table th, .price-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.price-table th {
  background: var(--bg-soft);
  font-weight: 600;
  color: var(--text-2);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: .05em;
}
.price-table tr:last-child td { border-bottom: none; }
.price-table .name { font-weight: 600; color: var(--text); }
.price-table .price {
  font-weight: 700;
  color: var(--primary);
  font-size: 16px;
}
.price-table tr:hover td { background: var(--bg-soft); }

/* ============ 服务流程 ============ */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.process-step {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 28px 24px;
  border: 1px solid var(--border);
  position: relative;
}
.process-step .step-num {
  position: absolute;
  top: -16px; left: 24px;
  width: 36px; height: 36px;
  border-radius: 10px;
  background: var(--gradient);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
  box-shadow: 0 6px 14px rgba(138,92,255,0.35);
}
.process-step h4 {
  font-size: 17px;
  margin: 14px 0 8px;
}
.process-step p { color: var(--text-2); font-size: 14px; }

/* ============ FAQ ============ */
.faq-list { display: grid; gap: 12px; max-width: 880px; margin: 0 auto; }
.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color .2s, box-shadow .2s;
}
.faq-item:hover { border-color: rgba(91,108,255,0.3); }
.faq-item.open { border-color: var(--primary); box-shadow: var(--shadow-sm); }
.faq-q {
  padding: 18px 22px;
  display: flex; justify-content: space-between; align-items: center;
  font-weight: 500;
  font-size: 15px;
  width: 100%;
  text-align: left;
  color: var(--text);
}
.faq-q .icon {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--gradient-soft);
  color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 14px;
  transition: transform .25s;
  flex-shrink: 0;
}
.faq-item.open .faq-q .icon { transform: rotate(45deg); }
.faq-a {
  display: none;
  padding: 0 22px 18px;
  color: var(--text-2);
  font-size: 14px;
  line-height: 1.7;
}
.faq-item.open .faq-a { display: block; }

/* ============ CTA Banner ============ */
.cta-banner {
  background: var(--gradient);
  border-radius: var(--radius-lg);
  padding: 56px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  color: #fff;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: ""; position: absolute;
  width: 400px; height: 400px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  top: -150px; right: -100px;
}
.cta-banner h3 {
  font-size: 28px;
  margin-bottom: 8px;
  position: relative;
}
.cta-banner p { opacity: .9; position: relative; max-width: 540px; }
.cta-banner .actions { display: flex; gap: 12px; position: relative; flex-shrink: 0; }
.cta-banner .btn-primary {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 6px 18px rgba(0,0,0,0.15);
}
.cta-banner .btn-primary:hover { background: #fff; box-shadow: 0 10px 28px rgba(0,0,0,0.22); }
.cta-banner .btn-ghost {
  background: rgba(255,255,255,0.15);
  color: #fff;
  border-color: rgba(255,255,255,0.3);
}
.cta-banner .btn-ghost:hover { background: rgba(255,255,255,0.25); }

/* ============ 在线下单 ============ */
.order-section { background: var(--bg-soft); }
.order-layout {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 32px;
  align-items: start;
}
.order-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-sm);
}
.form-section { margin-bottom: 28px; }
.form-section-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 14px;
  display: flex; align-items: center; gap: 8px;
}
.form-section-title::before {
  content: ""; width: 4px; height: 16px; border-radius: 2px;
  background: var(--gradient);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 14px;
}
.form-row.single { grid-template-columns: 1fr; }
.form-field { display: flex; flex-direction: column; }
.form-label {
  font-size: 13px;
  color: var(--text-2);
  margin-bottom: 6px;
}
.form-label .req { color: #f56565; margin-left: 2px; }
.form-control {
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-family: inherit;
  background: #fff;
  color: var(--text);
  transition: border-color .2s, box-shadow .2s;
}
.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(91,108,255,0.12);
}
textarea.form-control { resize: vertical; min-height: 80px; }
select.form-control { cursor: pointer; }

/* 周期选择卡片 */
.cycle-options {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}
.cycle-option {
  position: relative;
  cursor: pointer;
}
.cycle-option input { position: absolute; opacity: 0; pointer-events: none; }
.cycle-card {
  padding: 14px 10px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  text-align: center;
  transition: all .2s;
  background: #fff;
}
.cycle-card .c-name { font-weight: 600; font-size: 14px; margin-bottom: 4px; }
.cycle-card .c-discount { font-size: 12px; color: var(--text-3); }
.cycle-option input:checked + .cycle-card {
  border-color: var(--primary);
  background: var(--gradient-soft);
}
.cycle-option input:checked + .cycle-card .c-discount { color: var(--primary); font-weight: 600; }

/* 订单摘要 */
.summary-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  position: sticky; top: 90px;
}
.summary-card h3 {
  font-size: 18px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px dashed var(--border);
}
.summary-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 0;
  font-size: 14px;
}
.summary-row .label { color: var(--text-2); }
.summary-row .value { color: var(--text); font-weight: 500; }
.summary-divider {
  height: 1px; background: var(--border); margin: 12px 0;
}
.summary-total {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 16px 0 0;
}
.summary-total .label { font-size: 15px; color: var(--text); }
.summary-total .value {
  font-size: 30px; font-weight: 700;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.summary-tip {
  margin-top: 14px;
  padding: 12px;
  background: var(--gradient-soft);
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--text-2);
  line-height: 1.5;
}

/* ============ 右侧支付宝栏目 ============ */
.pay-card {
  margin-top: 20px;
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid #e1ecff;
}
.alipay-card {
  position: relative;
}
.alipay-card::before {
  content: "推荐支付方式";
  position: absolute;
  top: 14px; right: -32px;
  transform: rotate(35deg);
  background: linear-gradient(135deg, #ff8a00, #ff5722);
  color: #fff;
  font-size: 11px;
  letter-spacing: .04em;
  padding: 4px 36px;
  box-shadow: 0 4px 10px rgba(255, 87, 34, .3);
  z-index: 2;
}

.alipay-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  background: linear-gradient(135deg, #1677ff 0%, #00aaee 100%);
  color: #fff;
}
.alipay-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.alipay-logo {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: #fff;
  color: #1677ff;
  font-weight: 700;
  font-size: 22px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 10px rgba(0, 0, 0, .12);
}
.alipay-brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}
.alipay-brand-text strong {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .02em;
}
.alipay-brand-text span {
  font-size: 11px;
  opacity: .85;
}

.alipay-body {
  padding: 22px 22px 24px;
  text-align: center;
}

.qr-frame {
  position: relative;
  width: 168px; height: 168px;
  margin: 4px auto 16px;
  padding: 8px;
}
.qr-frame .qr-placeholder {
  width: 100%; height: 100%;
  margin: 0;
  border: 1.5px dashed #c9d6f0;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-3);
  font-size: 13px;
  background:
    repeating-linear-gradient(45deg, #f5f8ff, #f5f8ff 8px, #fff 8px, #fff 16px);
}
.qr-corner {
  position: absolute;
  width: 16px; height: 16px;
  border: 2.5px solid #1677ff;
  border-radius: 2px;
}
.qr-corner.tl { top: 0; left: 0; border-right: 0; border-bottom: 0; border-top-left-radius: 6px; }
.qr-corner.tr { top: 0; right: 0; border-left: 0; border-bottom: 0; border-top-right-radius: 6px; }
.qr-corner.bl { bottom: 0; left: 0; border-right: 0; border-top: 0; border-bottom-left-radius: 6px; }
.qr-corner.br { bottom: 0; right: 0; border-left: 0; border-top: 0; border-bottom-right-radius: 6px; }

.pay-headline {
  font-size: 14px;
  color: var(--text);
  margin-bottom: 8px;
  line-height: 1.5;
}
.pay-headline strong { color: #1677ff; font-weight: 600; }
.pay-tip { font-size: 12px; color: var(--text-3); line-height: 1.6; }
.pay-status {
  display: inline-block;
  padding: 3px 10px;
  background: rgba(255, 255, 255, .22);
  color: #fff;
  font-size: 11px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, .35);
}

/* ============ 第二步：支付宝扫码支付（页面内区块） ============ */
.pay-step-section {
  padding: 56px 0 80px;
  background: var(--bg-soft);
}

/* 步骤进度条 */
.step-progress {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 32px;
  list-style: none;
}
.step-progress .step {
  display: flex; align-items: center; gap: 10px;
  font-size: 14px;
  color: var(--text-3);
}
.step-progress .step .num {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: #e1e6f5;
  color: #fff;
  font-weight: 600;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 13px;
}
.step-progress .step.done .num {
  background: #c8d8ff;
  color: #fff;
}
.step-progress .step.done .label { color: var(--text-2); }
.step-progress .step.active { color: var(--text); font-weight: 600; }
.step-progress .step.active .num {
  background: linear-gradient(135deg, #1677ff 0%, #00aaee 100%);
  box-shadow: 0 4px 10px rgba(22, 119, 255, .3);
}
.step-progress .step-line {
  width: 64px; height: 2px;
  background: linear-gradient(90deg, #c8d8ff, #1677ff);
  border-radius: 2px;
}

/* 主卡片 */
.pay-step-card {
  max-width: 920px;
  margin: 0 auto;
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  border: 1px solid #e1ecff;
}

.pay-step-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 32px;
  background: linear-gradient(135deg, #1677ff 0%, #00aaee 100%);
  color: #fff;
  flex-wrap: wrap;
  gap: 12px;
}
.pay-step-header .alipay-brand-text strong { font-size: 18px; }
.pay-step-header .alipay-brand-text span { font-size: 12px; }
.pay-step-header .alipay-logo { width: 42px; height: 42px; font-size: 24px; }
.pay-step-header .pay-status {
  background: rgba(255, 255, 255, .2);
  border: 1px solid rgba(255, 255, 255, .35);
  color: #fff;
  padding: 5px 14px;
  font-size: 12px;
}

.pay-step-body { padding: 28px 32px 8px; }

/* 订单摘要：横向 4 格 */
.pay-step-summary {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  background: var(--bg-soft);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 28px;
}
.pay-step-summary .cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 0 18px;
  border-right: 1px solid var(--border);
}
.pay-step-summary .cell:first-child { padding-left: 0; }
.pay-step-summary .cell:last-child { border-right: 0; padding-right: 0; }
.pay-step-summary .lab { font-size: 12px; color: var(--text-3); }
.pay-step-summary .val { font-size: 15px; font-weight: 600; color: var(--text); }
.pay-step-summary .order-no {
  color: #1677ff;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 14px;
}
.pay-step-summary .cell.total .lab { color: var(--text-2); }
.pay-step-summary .cell.total .val {
  font-size: 24px;
  font-weight: 700;
  color: #ff5722;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}

/* 扫码区：左 QR、右说明 */
.pay-step-scan {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 40px;
  align-items: center;
  padding: 8px 4px 24px;
}
.qr-frame-lg {
  width: 260px; height: 260px;
  padding: 12px;
  margin: 0 auto;
}
.qr-frame-lg .qr-corner { width: 24px; height: 24px; border-width: 3px; }

.pay-step-instructions h4 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 16px;
  line-height: 1.5;
}
.pay-step-instructions h4 .hl { color: #1677ff; }
.pay-step-instructions ul { margin-bottom: 18px; }
.pay-step-instructions ul li {
  font-size: 14px;
  color: var(--text-2);
  padding: 4px 0;
}
.pay-step-warn {
  background: #fff8eb;
  border: 1px dashed #f5c97a;
  color: #b06b0a;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  line-height: 1.6;
}

.pay-step-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  padding: 20px 32px 26px;
  border-top: 1px solid var(--border);
  background: #fafbff;
}
.pay-step-actions .btn { min-width: 160px; }

/* 下单页保障承诺 */
.trust-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.trust-card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 28px 24px;
  border: 1px solid var(--border);
  display: flex;
  gap: 16px;
}
.trust-card .t-icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: var(--gradient-soft);
  color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.trust-card h4 { font-size: 16px; margin-bottom: 6px; }
.trust-card p { color: var(--text-2); font-size: 13px; }

/* ============ 关于我们 ============ */
.about-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.about-text h2 { font-size: 34px; margin-bottom: 16px; letter-spacing: -.02em; }
.about-text .lead { color: var(--text-2); font-size: 16px; margin-bottom: 24px; }
.about-info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.info-item {
  padding: 16px;
  background: var(--bg-soft);
  border-radius: var(--radius-sm);
}
.info-item .info-label {
  font-size: 12px; color: var(--text-3); margin-bottom: 4px;
}
.info-item .info-value { font-size: 14px; color: var(--text); font-weight: 500; }
.about-visual {
  background: var(--gradient);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  color: #fff;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}
.about-visual::before {
  content: ""; position: absolute;
  width: 240px; height: 240px;
  border-radius: 50%;
  background: rgba(255,255,255,0.12);
  top: -80px; right: -80px;
}
.about-visual::after {
  content: ""; position: absolute;
  width: 160px; height: 160px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  bottom: -60px; left: -60px;
}
.about-visual h3 { font-size: 26px; margin-bottom: 16px; position: relative; }
.about-visual ul { display: grid; gap: 14px; position: relative; }
.about-visual li {
  display: flex; align-items: center; gap: 10px;
  font-size: 15px;
}
.about-visual li::before {
  content: "✓";
  width: 22px; height: 22px;
  background: rgba(255,255,255,0.2);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px;
}

/* ============ Footer ============ */
footer {
  background: #0f1228;
  color: #b3b8d1;
  padding: 64px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand h4 { color: #fff; font-size: 18px; margin-bottom: 12px; }
.footer-brand p { font-size: 14px; line-height: 1.7; }
.footer-col h5 {
  color: #fff; font-size: 14px; margin-bottom: 16px;
  text-transform: uppercase; letter-spacing: .05em;
}
.footer-col ul { display: grid; gap: 10px; }
.footer-col li { font-size: 14px; }
.footer-col a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  display: flex; flex-wrap: wrap; gap: 12px;
  justify-content: space-between;
  font-size: 13px;
  color: #6f7596;
}
.footer-bottom a { transition: color .2s ease; }
.footer-bottom a:hover { color: #fff; }

/* ============ 成功弹窗 ============ */
.modal-mask {
  position: fixed; inset: 0;
  background: rgba(15, 18, 40, 0.55);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: none;
  align-items: center; justify-content: center;
  z-index: 2000;
  padding: 24px;
  animation: fadeIn .25s ease;
}
.modal-mask.show { display: flex; }
.modal {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 40px;
  max-width: 480px;
  width: 100%;
  box-shadow: 0 24px 80px rgba(0,0,0,0.25);
  text-align: center;
  animation: pop .3s ease;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes pop {
  from { opacity: 0; transform: translateY(20px) scale(.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
.modal .check {
  width: 72px; height: 72px;
  border-radius: 50%;
  background: var(--gradient);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 20px;
  font-size: 36px;
  box-shadow: 0 12px 24px rgba(138,92,255,0.4);
}
.modal h3 { font-size: 22px; margin-bottom: 8px; }
.modal .desc { color: var(--text-2); margin-bottom: 24px; }
.order-detail {
  background: var(--bg-soft);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
  text-align: left;
  margin-bottom: 18px;
}
.order-detail .row {
  display: flex; justify-content: space-between;
  padding: 6px 0;
  font-size: 14px;
}
.order-detail .row .lab { color: var(--text-2); }
.order-detail .row .val { font-weight: 500; }
.order-detail .row .order-no { color: var(--primary); font-family: ui-monospace, "SF Mono", Menlo, monospace; }
.modal .pay-mini {
  background: #fff8eb;
  border: 1px dashed #f5c97a;
  color: #b06b0a;
  padding: 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  margin-bottom: 20px;
}
.modal-actions { display: flex; gap: 12px; }
.modal-actions .btn { flex: 1; }

/* ============ 响应式 ============ */
@media (max-width: 980px) {
  section { padding: 72px 0; }
  .section-title { font-size: 30px; }
  .hero { padding: 120px 0 80px; }
  .hero-inner { grid-template-columns: 1fr; gap: 32px; }
  .hero h1 { font-size: 38px; }
  .hero-visual { height: 320px; }
  .page-header { padding: 110px 0 64px; }
  .page-header h1 { font-size: 36px; }
  .features-grid, .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-grid { grid-template-columns: 1fr; }
  .order-layout { grid-template-columns: 1fr; }
  .summary-card { position: static; }
  .about-layout { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .detail-item { grid-template-columns: 1fr; gap: 32px; }
  .detail-item.reverse .detail-visual { order: 0; }
  .cta-banner { flex-direction: column; align-items: flex-start; padding: 40px 32px; }
}
@media (max-width: 640px) {
  .container { padding: 0 18px; }
  section { padding: 60px 0; }
  .section-title { font-size: 26px; }
  .hero h1 { font-size: 30px; }
  .hero-sub { font-size: 15px; }
  .page-header h1 { font-size: 28px; }
  .nav-toggle { display: flex; }
  .nav-menu {
    position: absolute;
    top: 68px; left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    gap: 4px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    display: none;
  }
  .nav-open .nav-menu { display: flex; }
  .nav-actions .btn { display: none; }
  .features-grid, .adv-grid, .product-grid, .process-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .cycle-options { grid-template-columns: repeat(2, 1fr); }
  .order-card { padding: 28px 22px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .modal { padding: 28px 22px; }
  .pay-step-section { padding: 32px 0 56px; }
  .pay-step-header { padding: 18px 22px; }
  .pay-step-body { padding: 22px 22px 4px; }
  .pay-step-summary { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .pay-step-summary .cell { padding: 0; border-right: 0; }
  .pay-step-scan { grid-template-columns: 1fr; gap: 22px; justify-items: center; text-align: center; }
  .pay-step-instructions ul { display: inline-block; text-align: left; }
  .qr-frame-lg { width: 220px; height: 220px; }
  .pay-step-actions { padding: 16px 22px 22px; flex-direction: column-reverse; }
  .pay-step-actions .btn { width: 100%; min-width: 0; }
  .step-progress .step-line { width: 32px; }
  .step-progress .step .label { display: none; }
  .about-info { grid-template-columns: 1fr; }
  .price-table th, .price-table td { padding: 12px 14px; font-size: 13px; }
  .cta-banner h3 { font-size: 22px; }
}