/* AmyTelecom.shop Bundled Tech Stylesheet */

/* AmyTelecom.shop - Main Tech Style (Framework 10: Hologram Scan Reveal) */

:root {
  --primary-bg: #FFFFFF;
  --light-blue-bg: #F4F9FF;
  --tech-blue: #1677FF;
  --tech-blue-hover: #0958D9;
  --scan-blue: #00B8FF;
  --scan-glow: rgba(0, 184, 255, 0.25);
  --dark-text: #17324D;
  --secondary-text: #64748B;
  --border-color: #E1EBF5;
  --card-bg: #FFFFFF;
  --card-hover-shadow: 0 12px 32px rgba(22, 119, 255, 0.08);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --container-max: 1200px;
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--dark-text);
  background-color: var(--primary-bg);
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  line-height: 1.65;
  background-color: var(--primary-bg);
  color: var(--dark-text);
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

img, svg {
  max-width: 100%;
  height: auto;
  display: block;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  outline: none;
  background: none;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

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

.brand-logo-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.3rem;
  letter-spacing: -0.02em;
  color: var(--dark-text);
}

.brand-icon-svg {
  width: 34px;
  height: 34px;
  color: var(--tech-blue);
}

.brand-text-accent {
  color: var(--tech-blue);
  font-weight: 900;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--secondary-text);
  position: relative;
  padding: 8px 0;
  transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--tech-blue);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--tech-blue);
  transition: width var(--transition-fast);
}

.nav-link:hover::after {
  width: 100%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background: var(--tech-blue);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(22, 119, 255, 0.25);
}

.btn-primary:hover {
  background: var(--tech-blue-hover);
  box-shadow: 0 6px 20px rgba(22, 119, 255, 0.35);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--light-blue-bg);
  color: var(--tech-blue);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: #E8F3FF;
  border-color: #BADAFF;
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--dark-text);
  border: 1px solid var(--border-color);
}

.btn-outline:hover {
  border-color: var(--tech-blue);
  color: var(--tech-blue);
  background: var(--light-blue-bg);
}

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

.btn-block {
  width: 100%;
}

/* Mobile Nav Toggle */
.mobile-nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 32px;
  height: 32px;
  padding: 4px;
}

.mobile-nav-toggle span {
  display: block;
  width: 100%;
  height: 2.5px;
  background-color: var(--dark-text);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.mobile-nav-toggle.active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.mobile-nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-nav-toggle.active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Section Common */
.section {
  padding: 90px 0;
  position: relative;
}

.section-alt {
  background: var(--light-blue-bg);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--tech-blue);
  background: rgba(22, 119, 255, 0.08);
  border: 1px solid rgba(22, 119, 255, 0.18);
  border-radius: 999px;
  margin-bottom: 16px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--dark-text);
  line-height: 1.3;
  margin-bottom: 16px;
}

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

/* 03 Core Advantages - Asymmetric & Vertical Tech Architecture */
.adv-vertical-layout {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.adv-card {
  display: grid;
  grid-template-columns: 320px 1fr;
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.02);
  transition: all var(--transition-smooth);
}

.adv-card:hover {
  border-color: #BADAFF;
  box-shadow: var(--card-hover-shadow);
  transform: translateY(-2px);
}

.adv-card-header {
  background: linear-gradient(135deg, #F8FAFD 0%, #EFF6FF 100%);
  padding: 36px 30px;
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.adv-badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--tech-blue);
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  padding: 4px 10px;
  border-radius: 6px;
  margin-bottom: 16px;
  width: fit-content;
}

.adv-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--dark-text);
  margin-bottom: 8px;
  line-height: 1.35;
}

.adv-subtitle {
  font-size: 0.9rem;
  color: var(--secondary-text);
}

.adv-card-body {
  padding: 36px 36px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.adv-desc {
  font-size: 1rem;
  color: #334155;
  line-height: 1.8;
  margin-bottom: 28px;
}

.adv-highlights {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  background: #F8FAFC;
  padding: 18px 24px;
  border-radius: var(--radius-md);
  border: 1px solid #EDF2F7;
}

.adv-hl-item {
  display: flex;
  flex-direction: column;
}

.adv-hl-label {
  font-size: 0.78rem;
  color: var(--secondary-text);
  font-weight: 600;
  margin-bottom: 4px;
}

.adv-hl-value {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--tech-blue);
}

/* 04 Application Scenarios - Horizontal Interactive Tabs */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.scenario-card {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px 26px;
  transition: all var(--transition-smooth);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.scenario-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 0;
  background: var(--scan-blue);
  transition: height var(--transition-smooth);
}

.scenario-card:hover {
  border-color: #BADAFF;
  transform: translateY(-3px);
  box-shadow: var(--card-hover-shadow);
}

.scenario-card:hover::before {
  height: 100%;
}

.sc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.sc-tag {
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 4px;
  background: #EFF6FF;
  color: var(--tech-blue);
}

.sc-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--dark-text);
  margin-bottom: 8px;
}

.sc-headline {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--tech-blue);
  margin-bottom: 12px;
  line-height: 1.45;
}

.sc-desc {
  font-size: 0.92rem;
  color: var(--secondary-text);
  line-height: 1.7;
  margin-bottom: 16px;
  flex-grow: 1;
}

.sc-tips {
  font-size: 0.8rem;
  color: #94A3B8;
  background: #F8FAFC;
  padding: 8px 12px;
  border-radius: 6px;
  border-left: 2px solid #CBD5E1;
  line-height: 1.5;
}

/* 05 Pricing Packages */
.pricing-notice {
  max-width: 960px;
  margin: 0 auto 40px;
  padding: 16px 24px;
  background: #FFFBEB;
  border: 1px solid #FDE68A;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  color: #92400E;
  line-height: 1.6;
}

.pricing-notice-title {
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 40px;
}

.price-card {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-smooth);
}

.price-card:hover {
  border-color: var(--tech-blue);
  box-shadow: 0 16px 40px rgba(22, 119, 255, 0.12);
  transform: translateY(-4px);
}

.price-card.featured {
  border-color: var(--tech-blue);
  border-width: 2px;
  box-shadow: 0 8px 28px rgba(22, 119, 255, 0.1);
}

.card-ribbon {
  position: absolute;
  top: -12px;
  right: 24px;
  background: var(--tech-blue);
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 999px;
  letter-spacing: 0.05em;
  box-shadow: 0 4px 10px rgba(22, 119, 255, 0.3);
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--dark-text);
  margin-bottom: 6px;
}

.plan-target {
  font-size: 0.86rem;
  color: var(--secondary-text);
  margin-bottom: 24px;
  min-height: 40px;
  line-height: 1.5;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 8px;
}

.plan-currency {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--tech-blue);
}

.plan-price-num {
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--dark-text);
  line-height: 1;
}

.plan-period {
  font-size: 0.95rem;
  color: var(--secondary-text);
}

.plan-spec-summary {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.plan-spec-pill {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--tech-blue);
  background: #EFF6FF;
  padding: 4px 10px;
  border-radius: 6px;
}

.plan-features {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
}

.plan-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: #334155;
  margin-bottom: 12px;
  line-height: 1.5;
}

.feature-check {
  width: 18px;
  height: 18px;
  color: var(--tech-blue);
  flex-shrink: 0;
  margin-top: 2px;
}

.plan-status-note {
  font-size: 0.78rem;
  color: #94A3B8;
  text-align: center;
  margin-top: 12px;
}

/* Reference Differences Table */
.pricing-ref-diff {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  max-width: 960px;
  margin: 0 auto;
}

.diff-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--dark-text);
}

.diff-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.diff-table th, .diff-table td {
  padding: 10px 14px;
  border: 1px solid var(--border-color);
  text-align: left;
}

.diff-table th {
  background: #F8FAFC;
  font-weight: 600;
  color: var(--dark-text);
}

/* 06 Knowledge Articles */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.article-card {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-smooth);
}

.article-card:hover {
  border-color: #BADAFF;
  box-shadow: var(--card-hover-shadow);
  transform: translateY(-3px);
}

.art-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.art-badge {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--tech-blue);
  background: #EFF6FF;
  padding: 3px 8px;
  border-radius: 4px;
}

.art-date {
  font-size: 0.8rem;
  color: var(--secondary-text);
}

.art-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--dark-text);
  line-height: 1.45;
  margin-bottom: 12px;
}

.art-title a:hover {
  color: var(--tech-blue);
}

.art-excerpt {
  font-size: 0.9rem;
  color: var(--secondary-text);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.art-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid #F1F5F9;
}

.art-read-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--tech-blue);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.art-read-link:hover {
  color: var(--tech-blue-hover);
  gap: 8px;
}

/* 07 Reviews Section (白底黑字模式：6张真实用户评价卡片网格) */
.reviews-section-white {
  background: #FFFFFF;
  position: relative;
  overflow: hidden;
  padding: 90px 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.reviews-section-white .section-title {
  color: var(--dark-text);
}

.reviews-section-white .section-desc {
  color: var(--secondary-text);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card-white {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.03);
  transition: all var(--transition-smooth);
}

.review-card-white:hover {
  border-color: #BADAFF;
  box-shadow: 0 12px 32px rgba(22, 119, 255, 0.08);
  transform: translateY(-3px);
}

.rev-user-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
}

.rev-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.05rem;
  color: #FFFFFF;
  flex-shrink: 0;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.rev-user-meta {
  display: flex;
  flex-direction: column;
}

.rev-user-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--dark-text);
  line-height: 1.3;
}

.rev-user-role {
  font-size: 0.8rem;
  color: var(--secondary-text);
  margin-top: 3px;
}

.rev-stars {
  color: #F59E0B;
  font-size: 1.05rem;
  letter-spacing: 2px;
  margin-bottom: 14px;
  line-height: 1;
}

.rev-content {
  font-size: 0.92rem;
  color: #334155;
  line-height: 1.7;
  margin-bottom: 20px;
  flex-grow: 1;
}

.rev-verified-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  color: #059669;
  background: #ECFDF5;
  border: 1px solid #A7F3D0;
  width: fit-content;
}

/* 08 FAQ Accordion */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.faq-item.active {
  border-color: #BADAFF;
  box-shadow: 0 6px 20px rgba(22, 119, 255, 0.06);
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 22px 26px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--dark-text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #FFFFFF;
  transition: color var(--transition-fast);
}

.faq-question:hover {
  color: var(--tech-blue);
}

.faq-icon-arrow {
  width: 20px;
  height: 20px;
  color: var(--secondary-text);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.faq-item.active .faq-icon-arrow {
  transform: rotate(180deg);
  color: var(--tech-blue);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out, padding 0.35s ease;
  background: #FAFCFE;
}

.faq-item.active .faq-answer {
  max-height: 400px;
  padding: 0 26px 24px 26px;
}

.faq-answer-inner {
  font-size: 0.95rem;
  color: #334155;
  line-height: 1.8;
  white-space: pre-line;
  border-top: 1px solid #F1F5F9;
  padding-top: 18px;
}

/* 09 Footer */
.site-footer {
  background: #FFFFFF;
  border-top: 1px solid var(--border-color);
  padding: 70px 0 30px;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr 1fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand-desc {
  font-size: 0.9rem;
  color: var(--secondary-text);
  line-height: 1.7;
  margin: 16px 0 24px;
}

.footer-col-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--dark-text);
  margin-bottom: 20px;
}

.footer-links {
  list-style: none;
}

.footer-link-item {
  margin-bottom: 12px;
}

.footer-link {
  font-size: 0.88rem;
  color: var(--secondary-text);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--tech-blue);
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.84rem;
  color: #94A3B8;
  flex-wrap: wrap;
  gap: 16px;
}

/* Article Template Styles */
.article-header {
  padding: 60px 0 36px;
  background: linear-gradient(180deg, #FFFFFF 0%, #F4F9FF 100%);
  border-bottom: 1px solid var(--border-color);
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  color: var(--secondary-text);
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.breadcrumbs a {
  color: var(--secondary-text);
}

.breadcrumbs a:hover {
  color: var(--tech-blue);
}

.crumb-sep {
  color: #CBD5E1;
}

.article-h1 {
  font-size: 2.3rem;
  font-weight: 800;
  color: var(--dark-text);
  line-height: 1.3;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.86rem;
  color: var(--secondary-text);
  flex-wrap: wrap;
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 48px;
  padding: 50px 0 80px;
}

.direct-answer-box {
  background: #F0F7FF;
  border: 1px solid #BAE0FF;
  border-left: 4px solid var(--tech-blue);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 40px;
}

.direct-answer-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  font-weight: 800;
  color: var(--tech-blue);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.direct-answer-text {
  font-size: 1.02rem;
  font-weight: 500;
  color: #1E3A8A;
  line-height: 1.75;
}

.article-body h2 {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--dark-text);
  margin: 44px 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid #EDF2F7;
  scroll-margin-top: 90px;
}

.article-body p {
  font-size: 1.02rem;
  color: #334155;
  line-height: 1.85;
  margin-bottom: 20px;
}

.article-table-wrap {
  margin: 36px 0;
  overflow-x: auto;
}

.article-data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.article-data-table caption {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--dark-text);
  padding: 10px 0;
  text-align: left;
}

.article-data-table th, .article-data-table td {
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  text-align: left;
}

.article-data-table th {
  background: #F8FAFC;
  font-weight: 700;
  color: var(--dark-text);
}

.article-checklist-card {
  background: #F8FAFC;
  border: 1px solid #E2E8F0;
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin: 36px 0;
}

.chk-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--dark-text);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.chk-list {
  list-style: none;
}

.chk-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.95rem;
  color: #334155;
  margin-bottom: 10px;
  line-height: 1.6;
}

.chk-icon {
  width: 18px;
  height: 18px;
  color: var(--tech-blue);
  flex-shrink: 0;
  margin-top: 3px;
}

.article-sidebar {
  position: sticky;
  top: 96px;
  height: fit-content;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.sidebar-card {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px 20px;
}

.sidebar-card-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--dark-text);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.toc-list {
  list-style: none;
}

.toc-item {
  margin-bottom: 10px;
}

.toc-link {
  font-size: 0.88rem;
  color: var(--secondary-text);
  display: block;
  line-height: 1.45;
  transition: color var(--transition-fast);
}

.toc-link:hover {
  color: var(--tech-blue);
}

.promo-card {
  background: linear-gradient(135deg, #1677FF 0%, #00B8FF 100%);
  color: #FFFFFF;
  border-radius: var(--radius-md);
  padding: 28px 22px;
  text-align: center;
}

.promo-card h4 {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 10px;
}

.promo-card p {
  font-size: 0.86rem;
  opacity: 0.92;
  margin-bottom: 20px;
  line-height: 1.55;
}

.promo-btn {
  background: #FFFFFF;
  color: var(--tech-blue);
  font-weight: 700;
  width: 100%;
}

.promo-btn:hover {
  background: #F4F9FF;
  transform: translateY(-1px);
}


/* 10 | Hologram Scan Reveal (全息扫描核心动效) */

/* Hero Container & Tech Grid */
.hero-section {
  position: relative;
  padding: 80px 0 100px;
  background: #FFFFFF;
  overflow: hidden;
  border-bottom: 1px solid var(--border-color);
}

/* Subtle Tech Grid Lines in Background */
.hero-tech-grid {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    linear-gradient(to right, rgba(22, 119, 255, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(22, 119, 255, 0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 1;
}

.hero-glow-orb {
  position: absolute;
  top: -120px;
  right: -80px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0, 184, 255, 0.12) 0%, rgba(22, 119, 255, 0.04) 50%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 1;
}

.hero-layout {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 48px;
}

/* Left Hero Typography */
.hero-content {
  display: flex;
  flex-direction: column;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--tech-blue);
  background: rgba(22, 119, 255, 0.06);
  border: 1px solid rgba(22, 119, 255, 0.16);
  border-radius: 999px;
  margin-bottom: 24px;
  width: fit-content;
  letter-spacing: 0.04em;
  opacity: 0;
  animation: heroTextReveal 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.8s forwards;
}

.badge-pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--scan-blue);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--scan-blue);
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

.hero-h1 {
  font-size: 2.75rem;
  font-weight: 850;
  line-height: 1.25;
  letter-spacing: -0.025em;
  color: var(--dark-text);
  margin-bottom: 20px;
  opacity: 0;
  transform: translateY(16px);
  animation: heroTextReveal 0.8s cubic-bezier(0.16, 1, 0.3, 1) 1.1s forwards;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--secondary-text);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 600px;
  opacity: 0;
  transform: translateY(16px);
  animation: heroTextReveal 0.8s cubic-bezier(0.16, 1, 0.3, 1) 1.3s forwards;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
  opacity: 0;
  transform: translateY(16px);
  animation: heroTextReveal 0.8s cubic-bezier(0.16, 1, 0.3, 1) 1.5s forwards;
}

.hero-trust-row {
  display: flex;
  align-items: center;
  gap: 24px;
  opacity: 0;
  animation: heroTextReveal 0.8s cubic-bezier(0.16, 1, 0.3, 1) 1.7s forwards;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--secondary-text);
}

.trust-icon {
  width: 16px;
  height: 16px;
  color: var(--tech-blue);
}

@keyframes heroTextReveal {
  0% {
    opacity: 0;
    transform: translateY(16px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========================================================
   RIGHT: Hologram Scan Reveal Stage
   ======================================================== */
.hologram-stage {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 380px;
  padding: 20px;
}

/* Outer scanning chamber frame */
.hologram-chamber {
  position: relative;
  width: 100%;
  max-width: 440px;
  background: linear-gradient(145deg, #FFFFFF 0%, #F8FBFF 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  box-shadow: 0 16px 48px rgba(22, 119, 255, 0.08);
  overflow: hidden;
  /* Step 1: Slide in from the right */
  opacity: 0;
  transform: translateX(45px);
  animation: hologramSlideIn 1.2s cubic-bezier(0.16, 1, 0.3, 1) 0.1s forwards;
}

@keyframes hologramSlideIn {
  0% {
    opacity: 0;
    transform: translateX(45px);
  }
  100% {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Corner Tech Markers */
.chamber-corner {
  position: absolute;
  width: 12px;
  height: 12px;
  border-color: var(--scan-blue);
  pointer-events: none;
}
.corner-tl { top: 12px; left: 12px; border-top: 2px solid; border-left: 2px solid; }
.corner-tr { top: 12px; right: 12px; border-top: 2px solid; border-right: 2px solid; }
.corner-bl { bottom: 12px; left: 12px; border-bottom: 2px solid; border-left: 2px solid; }
.corner-br { bottom: 12px; right: 12px; border-bottom: 2px solid; border-right: 2px solid; }

/* Chamber Status Bar */
.chamber-status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
  font-size: 0.76rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  color: var(--secondary-text);
  letter-spacing: 0.08em;
  border-bottom: 1px dashed var(--border-color);
  padding-bottom: 10px;
}

.status-online {
  color: var(--tech-blue);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
}

.status-beacon {
  width: 6px;
  height: 6px;
  background: var(--scan-blue);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--scan-blue);
}

/* Hologram Visual Container */
.hologram-visual-box {
  position: relative;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px 0 10px;
}

/* Step 2 & 4: Initial blur & transparency revealing to crisp */
.hologram-logo-core {
  position: relative;
  width: 140px;
  height: 140px;
  margin-bottom: 24px;
  /* Starts blurred and semi-transparent, becomes sharp */
  filter: blur(5px);
  opacity: 0.35;
  animation: hologramSharpen 1.4s cubic-bezier(0.2, 0.8, 0.2, 1) 0.3s forwards;
}

@keyframes hologramSharpen {
  0% {
    filter: blur(5px);
    opacity: 0.35;
  }
  60% {
    filter: blur(2px);
    opacity: 0.8;
  }
  100% {
    filter: blur(0px);
    opacity: 1;
  }
}

/* The SVG Graphic of the AmyTelecom Hologram */
.hologram-svg {
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 8px 16px rgba(22, 119, 255, 0.15));
}

/* Step 3: Blue Horizontal Scan Line moving from top to bottom */
.hologram-scanline {
  position: absolute;
  left: 0;
  right: 0;
  top: -10%;
  height: 3px;
  background: linear-gradient(90deg, 
    transparent 0%, 
    rgba(0, 184, 255, 0.5) 15%, 
    #00B8FF 50%, 
    rgba(0, 184, 255, 0.5) 85%, 
    transparent 100%
  );
  box-shadow: 
    0 0 14px 2px #00B8FF,
    0 0 28px 4px rgba(0, 184, 255, 0.4);
  pointer-events: none;
  z-index: 10;
  /* Move top to bottom once */
  animation: scanPass 1.4s cubic-bezier(0.4, 0, 0.2, 1) 0.3s forwards;
}

@keyframes scanPass {
  0% {
    top: -5%;
    opacity: 0;
  }
  15% {
    opacity: 1;
  }
  85% {
    opacity: 1;
  }
  100% {
    top: 105%;
    opacity: 0;
  }
}

/* Step 5: Brief soft glow blooming after scanline passes */
.hologram-glow-flash {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 200px;
  height: 200px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(0, 184, 255, 0.35) 0%, rgba(22, 119, 255, 0.1) 40%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  opacity: 0;
  animation: glowBloom 1.2s ease-out 1.1s forwards;
}

@keyframes glowBloom {
  0% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.6);
  }
  40% {
    opacity: 0.8;
    transform: translate(-50%, -50%) scale(1.15);
  }
  100% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(1.3);
  }
}

/* Step 6: Hologram Text & Metrics */
.hologram-brand-title {
  font-size: 1.4rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  color: var(--dark-text);
  margin-bottom: 6px;
  text-align: center;
  opacity: 0;
  animation: heroTextReveal 0.6s ease-out 1.2s forwards;
}

.hologram-brand-subtitle {
  font-size: 0.82rem;
  color: var(--secondary-text);
  text-align: center;
  margin-bottom: 20px;
  opacity: 0;
  animation: heroTextReveal 0.6s ease-out 1.3s forwards;
}

.hologram-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  width: 100%;
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px;
  opacity: 0;
  animation: heroTextReveal 0.6s ease-out 1.4s forwards;
}

.metric-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.metric-val {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--tech-blue);
  font-family: ui-monospace, SFMono-Regular, monospace;
}

.metric-lbl {
  font-size: 0.72rem;
  color: var(--secondary-text);
  margin-top: 2px;
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  .hologram-chamber,
  .hero-badge,
  .hero-h1,
  .hero-subtitle,
  .hero-actions,
  .hero-trust-row,
  .hologram-brand-title,
  .hologram-brand-subtitle,
  .hologram-metrics {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }

  .hologram-logo-core {
    animation: none !important;
    filter: none !important;
    opacity: 1 !important;
  }

  .hologram-scanline,
  .hologram-glow-flash {
    display: none !important;
  }
}


/* AmyTelecom.shop - Responsive Adaptations */

/* Large Desktop (1440px+) */
@media (min-width: 1440px) {
  :root {
    --container-max: 1280px;
  }
  .hero-h1 {
    font-size: 3rem;
  }
}

/* Desktop & Laptop (1024px - 1439px) */
@media (max-width: 1199px) {
  .adv-card {
    grid-template-columns: 280px 1fr;
  }
  .pricing-grid {
    gap: 20px;
  }
  .articles-grid {
    gap: 20px;
  }
}

/* Tablet (768px - 1023px) */
@media (max-width: 1023px) {
  .hero-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-content {
    text-align: center;
    align-items: center;
  }
  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }
  .hero-actions {
    justify-content: center;
  }
  .hero-trust-row {
    justify-content: center;
  }
  .hologram-stage {
    min-height: auto;
  }
  .hologram-chamber {
    max-width: 480px;
    margin: 0 auto;
  }

  .adv-card {
    grid-template-columns: 1fr;
  }
  .adv-card-header {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }

  .scenarios-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
  }

  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-sidebar {
    position: static;
  }

  .footer-top {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Mobile Devices (375px - 767px) */
@media (max-width: 767px) {
  .container {
    padding: 0 16px;
  }

  .site-header {
    height: 64px;
  }

  .nav-inner {
    height: 64px;
  }

  .mobile-nav-toggle {
    display: flex;
  }

  /* Hamburger Drawer */
  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    background: #FFFFFF;
    flex-direction: column;
    align-items: flex-start;
    padding: 32px 24px;
    gap: 20px;
    border-top: 1px solid var(--border-color);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
    transform: translateY(-110%);
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 999;
  }

  .main-nav.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-link {
    font-size: 1.15rem;
    font-weight: 600;
    width: 100%;
    padding: 10px 0;
    border-bottom: 1px solid #F1F5F9;
  }

  .header-actions .btn {
    padding: 8px 16px;
    font-size: 0.88rem;
  }

  /* Hero */
  .hero-section {
    padding: 40px 0 60px;
  }

  .hero-h1 {
    font-size: 1.95rem;
    line-height: 1.3;
  }

  .hero-subtitle {
    font-size: 1rem;
    margin-bottom: 24px;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .hero-trust-row {
    flex-direction: column;
    gap: 10px;
  }

  /* Hologram Chamber on Mobile */
  .hologram-chamber {
    padding: 24px 20px;
    border-radius: var(--radius-md);
  }

  .hologram-logo-core {
    width: 110px;
    height: 110px;
    margin-bottom: 16px;
  }

  .hologram-brand-title {
    font-size: 1.2rem;
  }

  .hologram-metrics {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .section {
    padding: 56px 0;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .section-desc {
    font-size: 0.95rem;
  }

  .adv-card-header {
    padding: 24px 20px;
  }

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

  .adv-highlights {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .scenarios-grid {
    grid-template-columns: 1fr;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .articles-grid {
    grid-template-columns: 1fr;
  }

  .reviews-grid {
    grid-template-columns: 1fr;
  }

  .feedback-card {
    padding: 30px 20px;
  }

  .feedback-actions {
    flex-direction: column;
  }

  .feedback-actions .btn {
    width: 100%;
  }

  .faq-question {
    padding: 18px 20px;
    font-size: 0.98rem;
  }

  .faq-answer-inner {
    font-size: 0.9rem;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  /* Article Mobile */
  .article-h1 {
    font-size: 1.7rem;
  }

  .article-meta-bar {
    gap: 12px;
  }

  .direct-answer-box {
    padding: 18px 20px;
  }

  .article-data-table {
    font-size: 0.82rem;
  }

  .article-data-table th, .article-data-table td {
    padding: 8px 10px;
  }
}