/* ==========================================================================
   小伞软件科技 (Xiaosan Software Tech) - 西门子工业PLC软件代开发服务平台样式表
   工业级现代科技风 | 纯原生无外部依赖 | 响应式自适应
   ========================================================================== */

:root {
  --siemens-teal: #00646e;
  --siemens-teal-hover: #00828f;
  --siemens-teal-light: #e0f2f1;
  --siemens-accent: #0284c7;
  --siemens-accent-light: #e0f2fe;

  --dark-navy: #0f172a;
  --dark-slate: #1e293b;
  --dark-muted: #334155;

  --text-main: #1e293b;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-light: #94a3b8;

  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --bg-subtle: #f1f5f9;

  --border-light: #e2e8f0;
  --border-focus: #00646e;

  --warning-amber: #d97706;
  --warning-bg: #fef3c7;
  --success-green: #059669;
  --success-bg: #d1fae5;
  --danger-red: #dc2626;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.04);

  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", Consolas, "SFMono-Regular", Menlo, monospace;
}

/* 全局重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--siemens-teal);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--siemens-teal-hover);
}

img, svg {
  vertical-align: middle;
}

/* 布局容器 */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 72px 0;
}

.section-alt {
  background-color: var(--bg-card);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.section-title-wrap {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 52px auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  background-color: var(--siemens-teal-light);
  color: var(--siemens-teal);
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 9999px;
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--dark-navy);
  margin-bottom: 16px;
  line-height: 1.3;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* 顶部状态提示条 (Tailscale / 审计友好提示) */
.top-notice-bar {
  background: linear-gradient(90deg, #004b53 0%, var(--siemens-teal) 100%);
  color: #ffffff;
  padding: 8px 16px;
  font-size: 0.85rem;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.top-notice-badge {
  background: rgba(255, 255, 255, 0.2);
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
  font-size: 0.75rem;
}

/* 顶部导航栏 */
.header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: all 0.2s ease;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1.35rem;
  color: var(--dark-navy);
}

.brand-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--siemens-teal) 0%, var(--dark-navy) 100%);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 2px 6px rgba(0, 100, 110, 0.3);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  line-height: 1.1;
  letter-spacing: -0.3px;
}

.brand-sub {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-item a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 8px 4px;
  position: relative;
}

.nav-item a:hover,
.nav-item.active a {
  color: var(--siemens-teal);
}

.nav-item.active a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--siemens-teal);
  border-radius: 2px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--siemens-teal);
  color: #ffffff;
  box-shadow: 0 2px 4px rgba(0, 100, 110, 0.2);
}

.btn-primary:hover {
  background-color: var(--siemens-teal-hover);
  color: #ffffff;
  box-shadow: 0 4px 10px rgba(0, 100, 110, 0.3);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: #ffffff;
  color: var(--dark-navy);
  border-color: var(--border-light);
}

.btn-secondary:hover {
  background-color: var(--bg-subtle);
  border-color: var(--text-light);
  color: var(--dark-navy);
}

.btn-accent {
  background-color: #ea580c;
  color: #ffffff;
  box-shadow: 0 2px 6px rgba(234, 88, 12, 0.25);
}

.btn-accent:hover {
  background-color: #c2410c;
  color: #ffffff;
  transform: translateY(-1px);
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1.05rem;
}

.btn-sm {
  padding: 6px 14px;
  font-size: 0.85rem;
}

.btn-block {
  width: 100%;
}

/* 英雄区 (Hero Section) */
.hero {
  position: relative;
  background: radial-gradient(100% 120% at 50% 0%, #08242a 0%, var(--dark-navy) 100%);
  color: #ffffff;
  padding: 88px 0 96px 0;
  overflow: hidden;
}

.hero-grid-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 100, 110, 0.4);
  border: 1px solid rgba(0, 180, 190, 0.4);
  padding: 6px 14px;
  border-radius: 9999px;
  font-size: 0.85rem;
  color: #a5f3fc;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero-title .highlight {
  background: linear-gradient(90deg, #38bdf8 0%, #2dd4bf 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  font-size: 1.125rem;
  color: #cbd5e1;
  line-height: 1.8;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

/* 英雄区右侧模拟工控架构卡片 */
.hero-card {
  background: rgba(30, 41, 59, 0.8);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.hero-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 16px;
  margin-bottom: 20px;
}

.hero-card-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: #34d399;
  font-family: var(--font-mono);
}

.status-dot {
  width: 8px;
  height: 8px;
  background-color: #34d399;
  border-radius: 50%;
  box-shadow: 0 0 8px #34d399;
}

.hero-tech-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.tech-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.88rem;
}

.tech-item-name {
  color: #e2e8f0;
  display: flex;
  align-items: center;
  gap: 10px;
}

.tech-item-badge {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(56, 189, 248, 0.15);
  color: #38bdf8;
  border: 1px solid rgba(56, 189, 248, 0.3);
}

/* 核心指标统计带 */
.stats-banner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 32px 36px;
  margin-top: -48px;
  position: relative;
  z-index: 10;
  box-shadow: var(--shadow-lg);
}

.stat-item {
  text-align: center;
  border-right: 1px solid var(--border-light);
}

.stat-item:last-child {
  border-right: none;
}

.stat-number {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--siemens-teal);
  line-height: 1.1;
  margin-bottom: 6px;
  font-family: var(--font-mono);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* 特色技术卡片网格 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--siemens-teal);
}

.feature-icon-wrap {
  width: 52px;
  height: 52px;
  background-color: var(--siemens-teal-light);
  color: var(--siemens-teal);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--dark-navy);
  margin-bottom: 12px;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag-pill {
  font-size: 0.78rem;
  background-color: var(--bg-subtle);
  color: var(--text-muted);
  padding: 3px 10px;
  border-radius: 4px;
  border: 1px solid var(--border-light);
}

/* ==========================================================================
   商品与服务定价页样式 (审核核心)
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.25s ease;
}

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

.pricing-card.featured {
  border: 2px solid var(--siemens-teal);
  box-shadow: 0 10px 25px -5px rgba(0, 100, 110, 0.15);
}

.pricing-ribbon {
  position: absolute;
  top: 14px;
  right: 14px;
  background-color: #ea580c;
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 9999px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.pricing-head {
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 24px;
  margin-bottom: 24px;
}

.pricing-name {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--dark-navy);
  margin-bottom: 8px;
}

.pricing-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
  min-height: 40px;
}

.pricing-price-wrap {
  margin-top: 16px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.pricing-symbol {
  font-size: 1.35rem;
  font-weight: 700;
  color: #ea580c;
}

.pricing-amount {
  font-size: 2.4rem;
  font-weight: 800;
  color: #ea580c;
  font-family: var(--font-mono);
  letter-spacing: -1px;
}

.pricing-unit {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.pricing-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
  flex-grow: 1;
}

.pricing-feature-item {
  font-size: 0.9rem;
  color: var(--text-secondary);
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.5;
}

.pricing-feature-item svg {
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--success-green);
}

.pricing-card .btn {
  margin-top: auto;
}

/* 在线估价计算器 */
.calc-box {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-md);
  margin-top: 56px;
}

.calc-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--dark-navy);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.calc-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr) 1.2fr;
  gap: 24px;
  margin-top: 28px;
  align-items: center;
}

.calc-field label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.calc-field select,
.calc-field input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  background: var(--bg-subtle);
  font-size: 0.95rem;
  color: var(--text-main);
  outline: none;
  transition: border-color 0.2s;
}

.calc-field select:focus,
.calc-field input:focus {
  border-color: var(--siemens-teal);
  background: #ffffff;
}

.calc-summary {
  background: var(--siemens-teal-light);
  border: 1px solid rgba(0, 100, 110, 0.2);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
}

.calc-summary-label {
  font-size: 0.85rem;
  color: var(--siemens-teal);
  font-weight: 600;
}

.calc-summary-val {
  font-size: 2rem;
  font-weight: 800;
  color: #ea580c;
  font-family: var(--font-mono);
  margin: 6px 0 12px 0;
}

/* ==========================================================================
   在线收银台与支付结算页样式 (支付页审核核心)
   ========================================================================== */
.checkout-layout {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr;
  gap: 36px;
  align-items: start;
}

.checkout-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
}

.checkout-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--dark-navy);
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.order-badge-live {
  font-size: 0.78rem;
  background-color: var(--warning-bg);
  color: var(--warning-amber);
  padding: 4px 10px;
  border-radius: 9999px;
  font-weight: 600;
  font-family: var(--font-mono);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.form-grid-full {
  grid-column: span 2;
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-group label .required {
  color: var(--danger-red);
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: inherit;
  background-color: #ffffff;
  transition: all 0.2s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--siemens-teal);
  box-shadow: 0 0 0 3px rgba(0, 100, 110, 0.12);
}

/* 支付渠道选择 */
.payment-methods {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 14px;
}

.payment-method-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  background-color: #ffffff;
}

.payment-method-item:hover {
  border-color: var(--text-light);
  background-color: var(--bg-subtle);
}

.payment-method-item.selected {
  border-color: var(--siemens-teal);
  background-color: rgba(0, 100, 110, 0.03);
}

.pm-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.pm-radio {
  width: 18px;
  height: 18px;
  accent-color: var(--siemens-teal);
}

.pm-icon-badge {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.pm-icon-wx {
  background-color: #07c160;
  color: #ffffff;
}

.pm-icon-ali {
  background-color: #1677ff;
  color: #ffffff;
}

.pm-icon-bank {
  background-color: #991b1b;
  color: #ffffff;
}

.pm-details {
  display: flex;
  flex-direction: column;
}

.pm-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--dark-navy);
}

.pm-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.pm-tag {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}

.pm-tag-rec {
  background-color: #fef2f2;
  color: #dc2626;
  border: 1px solid #fecaca;
}

/* 订单摘要侧边栏 (右侧) */
.order-summary-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 96px;
}

.summary-order-id {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--border-light);
  display: flex;
  justify-content: space-between;
}

.summary-item-preview {
  display: flex;
  gap: 14px;
  margin-bottom: 20px;
}

.summary-item-icon {
  width: 48px;
  height: 48px;
  background-color: var(--siemens-teal-light);
  color: var(--siemens-teal);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.summary-item-title {
  font-weight: 700;
  color: var(--dark-navy);
  font-size: 0.98rem;
  margin-bottom: 4px;
}

.summary-item-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.price-breakdown {
  border-top: 1px solid var(--border-light);
  padding-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

.pb-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.pb-total {
  border-top: 1px dashed var(--border-light);
  padding-top: 12px;
  margin-top: 4px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.pb-total-label {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--dark-navy);
}

.pb-total-price {
  font-size: 1.85rem;
  font-weight: 800;
  color: #ea580c;
  font-family: var(--font-mono);
}

.policy-agreement {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.policy-agreement input {
  margin-top: 3px;
  accent-color: var(--siemens-teal);
}

/* ==========================================================================
   收银台弹窗 (Modal) - 极其重要：扫码支付高保真UI
   ========================================================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 999;
  padding: 20px;
}

.modal-overlay.active {
  display: flex;
}

.cashier-modal {
  background: #ffffff;
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 480px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  overflow: hidden;
  animation: modalSlideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalSlideUp {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.cashier-header {
  background: linear-gradient(135deg, var(--siemens-teal) 0%, var(--dark-navy) 100%);
  color: #ffffff;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.cashier-header-title {
  font-size: 1.15rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.cashier-close-btn {
  background: transparent;
  border: none;
  color: #cbd5e1;
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
}

.cashier-close-btn:hover {
  color: #ffffff;
}

.cashier-body {
  padding: 32px 28px;
  text-align: center;
}

.cashier-amount-box {
  margin-bottom: 24px;
}

.cashier-amount-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.cashier-amount-num {
  font-size: 2.4rem;
  font-weight: 800;
  color: #ea580c;
  font-family: var(--font-mono);
}

.cashier-qr-wrapper {
  display: inline-block;
  padding: 16px;
  background: #ffffff;
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  position: relative;
  margin-bottom: 16px;
}

.cashier-qr-img {
  width: 200px;
  height: 200px;
  display: block;
}

.qr-center-logo {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 44px;
  height: 44px;
  background: #ffffff;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4px;
}

.cashier-timer-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--warning-bg);
  color: var(--warning-amber);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 9999px;
  margin-bottom: 20px;
}

.cashier-instruction {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 24px;
}

.cashier-footer {
  border-top: 1px solid var(--border-light);
  padding: 16px 24px;
  background: var(--bg-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ==========================================================================
   客户案例与交付规范
   ========================================================================== */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.3s ease;
}

.case-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--siemens-teal);
}

.case-card-header {
  background: linear-gradient(135deg, var(--dark-slate) 0%, var(--dark-navy) 100%);
  color: #ffffff;
  padding: 24px;
}

.case-badge {
  font-size: 0.75rem;
  background: rgba(0, 100, 110, 0.6);
  color: #a5f3fc;
  padding: 3px 10px;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
}

.case-title {
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.4;
}

.case-body {
  padding: 24px;
}

.case-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
  font-size: 0.85rem;
}

.case-meta-label {
  color: var(--text-muted);
}

.case-meta-val {
  color: var(--dark-navy);
  font-weight: 600;
}

.case-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   页脚规范 (含完备合规与ICP备案占位)
   ========================================================================== */
.footer {
  background-color: var(--dark-navy);
  color: #cbd5e1;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 64px 0 32px 0;
  font-size: 0.9rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand-desc {
  font-size: 0.88rem;
  color: #94a3b8;
  line-height: 1.7;
  margin: 16px 0 24px 0;
  max-width: 340px;
}

.footer-col-title {
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 20px;
  letter-spacing: 0.3px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  color: #94a3b8;
  font-size: 0.88rem;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: #38bdf8;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.82rem;
  color: #64748b;
}

.footer-icp {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.footer-icp a {
  color: #64748b;
}

.footer-icp a:hover {
  color: #94a3b8;
}

/* ==========================================================================
   响应式断点 (移动端适配)
   ========================================================================== */
@media (max-width: 1024px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-banner {
    grid-template-columns: repeat(2, 1fr);
    row-gap: 24px;
  }
  .stat-item:nth-child(2) {
    border-right: none;
  }
  .checkout-layout {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-title {
    font-size: 2rem;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .cases-grid {
    grid-template-columns: 1fr;
  }
  .calc-grid {
    grid-template-columns: 1fr;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .form-grid-full {
    grid-column: span 1;
  }
  .nav-links {
    display: none; /* 移动端精简 */
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
}