/* ==========================================================================
   泰山机场 · 山脊路径导航 - 样式系统 (2026)
   配色方案：纯白、浅灰绿、松柏绿、蓝灰、强调橙、浅绿、浅蓝
   设计语言：横向分流、分支路径、节点连接、现代技术轻商务风格
   ========================================================================== */

:root {
  --bg-page: #FAFBF8;
  --bg-white: #FFFFFF;
  --bg-light: #F2F5F1;
  --bg-green-light: #EDF3EF;
  --bg-blue-light: #EEF3F6;
  --bg-footer: #EDF2EE;

  --text-main: #18241F;
  --text-body: #56625D;
  --text-muted: #87918C;
  --text-footer: #46514B;

  --color-pine: #356A58;
  --color-pine-dark: #294F43;
  --color-blue-gray: #527B91;
  --color-orange: #C58350;
  --color-orange-light: #FDF4EC;

  --border-color: #DFE6E1;
  --border-light: #EBF0ED;
  --border-pine: rgba(53, 106, 88, 0.25);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "SF Mono", Consolas, "Liberation Mono", Menlo, Courier, monospace;

  --shadow-subtle: 0 2px 8px rgba(24, 36, 31, 0.04);
  --shadow-card: 0 4px 16px rgba(24, 36, 31, 0.06);
  --shadow-hover: 0 8px 24px rgba(24, 36, 31, 0.08);

  --header-height: 70px;
  --max-width: 1240px;
  --content-width: 800px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --transition: all 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--text-body);
  line-height: 1.7;
  font-feature-settings: "cv02", "cv03", "cv04", "cv11";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
  color: var(--color-pine-dark);
}

img, svg {
  vertical-align: middle;
}

ul, ol {
  list-style: none;
}

/* 布局容器 */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section-block {
  padding-top: 80px;
  padding-bottom: 80px;
  border-bottom: 1px solid var(--border-color);
}

.section-block:last-of-type {
  border-bottom: none;
}

.section-header {
  margin-bottom: 40px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-pine);
  background-color: var(--bg-green-light);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  letter-spacing: 0.02em;
}

.section-tag::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-pine);
}

.section-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.35;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.section-lead {
  font-size: 16px;
  color: var(--text-body);
  max-width: 820px;
  line-height: 1.75;
}

/* 顶部导航 Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background-color: var(--bg-white);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-subtle);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-logo-svg {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

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

.brand-name {
  font-size: 19px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: 0.02em;
  line-height: 1.2;
}

.brand-subtitle {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.04em;
}

/* 导航链接 */
.main-nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-link {
  position: relative;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-main);
  padding: 8px 2px;
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--color-pine);
}

.nav-link.active {
  color: var(--color-pine-dark);
  font-weight: 600;
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: -15px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-pine);
  border-radius: 1px;
}

.header-action {
  display: flex;
  align-items: center;
}

.btn-header-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  background-color: var(--color-pine);
  color: var(--bg-white);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-pine);
  box-shadow: 0 1px 3px rgba(53, 106, 88, 0.2);
  transition: var(--transition);
}

.btn-header-cta:hover {
  background-color: var(--color-pine-dark);
  color: var(--bg-white);
  transform: translateY(-1px);
}

.btn-header-cta .arrow {
  transition: transform 0.2s ease;
}

.btn-header-cta:hover .arrow {
  transform: translateX(3px);
}

/* 移动端菜单按钮 */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--text-main);
}

.menu-toggle svg {
  width: 24px;
  height: 24px;
}

/* 移动端导航抽屉 */
.mobile-nav-drawer {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-white);
  padding: 24px;
  overflow-y: auto;
  border-top: 1px solid var(--border-color);
  z-index: 99;
}

.mobile-nav-drawer.open {
  display: block;
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.mobile-nav-link {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  padding: 10px 0;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.mobile-nav-link:hover {
  color: var(--color-pine);
}

.mobile-cta-wrap {
  margin-top: 24px;
}

.btn-mobile-cta {
  display: block;
  text-align: center;
  padding: 14px;
  background-color: var(--color-pine);
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 16px;
}

/* ==========================================================================
   Hero 区域：山脊路径导航
   ========================================================================== */
.hero-section {
  position: relative;
  background-color: var(--bg-page);
  padding-top: 50px;
  padding-bottom: 60px;
  border-bottom: 1px solid var(--border-color);
  min-height: 620px;
  display: flex;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 36px;
  width: 100%;
}

.hero-meta-top {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 860px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-pine);
  background-color: var(--bg-green-light);
  padding: 5px 14px;
  border-radius: var(--radius-sm);
  width: fit-content;
}

.hero-brand {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-blue-gray);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.hero-headline {
  font-size: 38px;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.hero-h1-seo {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-pine-dark);
  margin-top: -4px;
}

.hero-subtitle {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-blue-gray);
  letter-spacing: 0.01em;
}

.hero-description {
  font-size: 16px;
  color: var(--text-body);
  line-height: 1.8;
  max-width: 780px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  margin-top: 8px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background-color: var(--color-pine);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-pine);
  box-shadow: 0 2px 6px rgba(53, 106, 88, 0.25);
  transition: var(--transition);
}

.btn-primary:hover {
  background-color: var(--color-pine-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(53, 106, 88, 0.3);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  background-color: var(--bg-white);
  color: var(--text-main);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.btn-secondary:hover {
  background-color: var(--bg-light);
  border-color: var(--color-pine);
  color: var(--color-pine);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 20px;
  background-color: transparent;
  color: var(--color-pine);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px dashed var(--color-pine);
  transition: var(--transition);
}

.btn-outline:hover {
  background-color: var(--bg-green-light);
  border-style: solid;
}

/* ==========================================================================
   Hero 核心：4条使用路径 (山脊路径横向分流架构)
   ========================================================================== */
.ridge-path-nav-wrapper {
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  box-shadow: var(--shadow-card);
  margin-top: 10px;
}

.ridge-path-title-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 16px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border-light);
}

.ridge-path-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-pine-dark);
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.ridge-path-hint {
  font-size: 12px;
  color: var(--text-muted);
}

/* 横向分流大结构：左入口 -> 中四路径 -> 右目标 */
.path-split-system {
  display: grid;
  grid-template-columns: 140px 1fr 180px;
  gap: 20px;
  align-items: center;
}

.path-origin-node {
  background-color: var(--bg-green-light);
  border: 2px solid var(--color-pine);
  border-radius: var(--radius-md);
  padding: 24px 14px;
  text-align: center;
  position: relative;
}

.path-origin-node::after {
  content: "";
  position: absolute;
  right: -21px;
  top: 50%;
  width: 20px;
  height: 2px;
  background-color: var(--color-pine);
}

.origin-badge {
  font-size: 11px;
  font-weight: 700;
  color: var(--color-pine-dark);
  background-color: #fff;
  padding: 2px 8px;
  border-radius: 20px;
  display: inline-block;
  margin-bottom: 8px;
}

.origin-title {
  font-size: 16px;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.3;
}

.origin-desc {
  font-size: 12px;
  color: var(--text-body);
  margin-top: 6px;
}

/* 中间4条路径容器 */
.path-branches-flow {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.path-branch-item {
  display: grid;
  grid-template-columns: 120px 1fr 140px 1fr;
  align-items: center;
  gap: 12px;
  background-color: var(--bg-page);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  transition: var(--transition);
  position: relative;
}

.path-branch-item:hover {
  background-color: var(--bg-green-light);
  border-color: var(--color-pine);
  transform: translateX(3px);
}

.branch-name-col {
  display: flex;
  align-items: center;
  gap: 8px;
}

.branch-node-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-pine);
  flex-shrink: 0;
  box-shadow: 0 0 0 3px var(--bg-green-light);
}

.branch-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
}

.branch-step {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-body);
}

.branch-arrow {
  color: var(--text-muted);
  font-size: 12px;
}

.branch-tag {
  font-size: 12px;
  color: var(--color-blue-gray);
  background-color: var(--bg-white);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
}

.branch-dest-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-pine);
  text-align: right;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
}

.branch-dest-link:hover {
  color: var(--color-pine-dark);
}

/* 右侧用途终点列 */
.path-destinations-summary {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.dest-summary-card {
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 12px;
}

.dest-card-title {
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 2px;
}

.dest-card-sub {
  color: var(--text-muted);
}

/* ==========================================================================
   路径分段详细区 (路径01, 路径02, 路径03, 路径04)
   ========================================================================== */

/* 路径01 / 日常使用 */
.path-step-flow {
  display: flex;
  align-items: center;
  gap: 14px;
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-top: 24px;
  overflow-x: auto;
}

.flow-step-item {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.flow-node-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  background-color: var(--bg-light);
  border: 1px solid var(--border-color);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
}

.flow-step-arrow {
  color: var(--color-pine);
  font-weight: bold;
}

.flow-node-badge.active-end {
  background-color: var(--bg-green-light);
  border-color: var(--color-pine);
  color: var(--color-pine-dark);
}

.daily-scope-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 28px;
}

.daily-scope-item {
  background-color: var(--bg-white);
  border-left: 3px solid var(--color-pine);
  padding: 14px 18px;
  border-top: 1px solid var(--border-light);
  border-right: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.daily-scope-item h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 4px;
}

.daily-scope-item p {
  font-size: 13px;
  color: var(--text-body);
  line-height: 1.6;
}

/* 路径02 / AI工具 */
.ai-path-pipeline {
  display: flex;
  align-items: center;
  gap: 12px;
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px 24px;
  margin-top: 24px;
  margin-bottom: 24px;
  overflow-x: auto;
}

.ai-platform-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
}

.ai-platform-item {
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 16px;
  transition: var(--transition);
}

.ai-platform-item:hover {
  border-color: var(--color-pine);
  box-shadow: var(--shadow-subtle);
}

.ai-platform-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.ai-platform-tag {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-blue-gray);
  background-color: var(--bg-blue-light);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

.ai-platform-desc {
  font-size: 13px;
  color: var(--text-body);
  line-height: 1.5;
}

.ai-notice-box {
  background-color: var(--bg-light);
  border-left: 3px solid var(--color-blue-gray);
  padding: 12px 18px;
  margin-top: 20px;
  font-size: 13px;
  color: var(--text-body);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* 路径03 / 流媒体 */
.streaming-platform-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-top: 24px;
}

.streaming-platform-table th,
.streaming-platform-table td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--border-light);
  font-size: 14px;
}

.streaming-platform-table th {
  background-color: var(--bg-light);
  font-weight: 700;
  color: var(--text-main);
}

.streaming-platform-table tr:last-child td {
  border-bottom: none;
}

.streaming-platform-table tr:hover td {
  background-color: var(--bg-page);
}

/* 路径04 / 办公与开发 */
.office-four-col-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-top: 24px;
}

.office-four-col-table th,
.office-four-col-table td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--border-light);
  font-size: 14px;
}

.office-four-col-table th {
  background-color: var(--bg-light);
  font-weight: 700;
  color: var(--text-main);
}

.office-four-col-table tr:last-child td {
  border-bottom: none;
}

.office-four-col-table tr:hover td {
  background-color: var(--bg-page);
}

/* ==========================================================================
   节点地区：目的地索引 (Destination Index)
   ========================================================================== */
.destination-index-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.destination-index-table th,
.destination-index-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border-light);
  font-size: 14px;
}

.destination-index-table th {
  background-color: var(--bg-light);
  font-weight: 700;
  color: var(--text-main);
}

.destination-index-table tr:last-child td {
  border-bottom: none;
}

.destination-index-table tr:hover td {
  background-color: var(--bg-page);
}

.dest-id-badge {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--color-pine);
  background-color: var(--bg-green-light);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.dest-name-strong {
  font-weight: 700;
  color: var(--text-main);
  font-size: 15px;
}

/* ==========================================================================
   线路选择：技术对比表
   ========================================================================== */
.line-tech-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.line-tech-table th,
.line-tech-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border-light);
  font-size: 14px;
}

.line-tech-table th {
  background-color: var(--bg-light);
  font-weight: 700;
  color: var(--text-main);
}

.line-tech-table tr:last-child td {
  border-bottom: none;
}

.line-tech-table tr:hover td {
  background-color: var(--bg-page);
}

/* ==========================================================================
   客户端：设备路径表
   ========================================================================== */
.client-device-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.client-device-table th,
.client-device-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border-light);
  font-size: 14px;
}

.client-device-table th {
  background-color: var(--bg-light);
  font-weight: 700;
  color: var(--text-main);
}

.client-device-table tr:last-child td {
  border-bottom: none;
}

.client-device-table tr:hover td {
  background-color: var(--bg-page);
}

/* ==========================================================================
   套餐价格：路径容量表 (5档套餐，主力推荐唯一突出，长期独立)
   ========================================================================== */
.pricing-flow-container {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

/* 横向月付4档路径轴 */
.pricing-horizontal-axis {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  position: relative;
}

.pricing-plan-item {
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  position: relative;
}

.pricing-plan-item:hover {
  border-color: var(--color-pine);
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}

/* 主力推荐唯一突出视觉 */
.pricing-plan-item.highlight-main {
  background-color: var(--bg-green-light);
  border: 2px solid var(--color-pine);
  box-shadow: var(--shadow-card);
  transform: scale(1.02);
  z-index: 2;
}

.pricing-plan-item.highlight-main:hover {
  transform: scale(1.02) translateY(-2px);
}

.pricing-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.pricing-plan-name {
  font-size: 17px;
  font-weight: 800;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

.pricing-badge-main {
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  background-color: var(--color-orange);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
}

.pricing-badge-sub {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-blue-gray);
  background-color: var(--bg-blue-light);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

.pricing-node-indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid var(--color-pine);
  background-color: #fff;
}

.pricing-plan-item.highlight-main .pricing-node-indicator {
  background-color: var(--color-pine-dark);
  border-color: var(--color-pine-dark);
}

.pricing-price-wrap {
  margin-bottom: 14px;
}

.price-currency {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
}

.price-number {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.price-period {
  font-size: 13px;
  color: var(--text-muted);
}

.pricing-capacity-box {
  background-color: var(--bg-page);
  border: 1px solid var(--border-light);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-pine-dark);
  margin-bottom: 16px;
}

.pricing-plan-item.highlight-main .pricing-capacity-box {
  background-color: #fff;
  border-color: var(--border-pine);
}

.pricing-use-case {
  font-size: 13px;
  color: var(--text-body);
  line-height: 1.6;
  margin-bottom: 24px;
  flex-grow: 1;
}

.pricing-use-case li {
  position: relative;
  padding-left: 14px;
  margin-bottom: 6px;
}

.pricing-use-case li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--color-pine);
}

.btn-pricing-cta {
  display: block;
  text-align: center;
  padding: 10px 16px;
  background-color: var(--bg-white);
  color: var(--color-pine);
  font-size: 14px;
  font-weight: 700;
  border: 1px solid var(--color-pine);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.btn-pricing-cta:hover {
  background-color: var(--color-pine);
  color: #fff;
}

.pricing-plan-item.highlight-main .btn-pricing-cta {
  background-color: var(--color-pine);
  color: #fff;
}

.pricing-plan-item.highlight-main .btn-pricing-cta:hover {
  background-color: var(--color-pine-dark);
}

/* 独立长期备用路径 */
.pricing-annual-standalone {
  background-color: var(--bg-white);
  border: 1px dashed var(--color-blue-gray);
  border-radius: var(--radius-md);
  padding: 20px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

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

.annual-badge {
  font-size: 12px;
  font-weight: 700;
  color: var(--color-blue-gray);
  background-color: var(--bg-blue-light);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

.annual-title-wrap h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-main);
}

.annual-title-wrap p {
  font-size: 13px;
  color: var(--text-muted);
}

.annual-mid-price {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.annual-mid-price .price-num {
  font-size: 26px;
  font-weight: 800;
  color: var(--text-main);
}

.annual-capacity {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-pine);
}

/* 快速选择路径指引 */
.pricing-quick-selector {
  background-color: var(--bg-light);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  font-size: 13px;
}

.selector-tag {
  font-weight: 700;
  color: var(--text-main);
}

.selector-flow-items {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.selector-step {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-body);
}

.selector-step strong {
  color: var(--color-pine-dark);
}

/* ==========================================================================
   首页文章区：路径知识导航 (Path Knowledge Navigation)
   ========================================================================== */
.knowledge-nav-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 32px;
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-subtle);
}

.knowledge-category-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-right: 1px solid var(--border-light);
  padding-right: 20px;
}

.category-tab-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  transition: var(--transition);
}

.category-tab-link:hover,
.category-tab-link.active {
  background-color: var(--bg-green-light);
  color: var(--color-pine-dark);
}

.category-tab-link .cat-arrow {
  color: var(--text-muted);
  font-size: 12px;
}

.knowledge-article-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.knowledge-article-item {
  display: flex;
  gap: 16px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-light);
  position: relative;
}

.knowledge-article-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.article-line-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 4px;
}

.art-node-circle {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-pine);
}

.art-node-stem {
  width: 1px;
  flex-grow: 1;
  background-color: var(--border-color);
  margin-top: 6px;
}

.article-content-box {
  flex-grow: 1;
}

.article-meta-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.article-path-tag {
  font-size: 11px;
  font-weight: 700;
  color: var(--color-pine);
  background-color: var(--bg-green-light);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.article-item-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.4;
  margin-bottom: 6px;
}

.article-item-title a {
  color: var(--text-main);
}

.article-item-title a:hover {
  color: var(--color-pine);
}

.article-item-excerpt {
  font-size: 13px;
  color: var(--text-body);
  line-height: 1.6;
  margin-bottom: 8px;
}

.article-read-more {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-pine);
}

.article-read-more:hover {
  color: var(--color-pine-dark);
}

/* ==========================================================================
   网络排障：路径异常排查 (Network Troubleshooting)
   ========================================================================== */
.troubleshooting-pipeline {
  display: flex;
  flex-direction: column;
  gap: 12px;
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-top: 24px;
}

.ts-step-row {
  display: grid;
  grid-template-columns: 80px 140px 1fr;
  align-items: center;
  gap: 16px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-page);
  border: 1px solid var(--border-light);
}

.ts-step-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--color-pine);
}

.ts-step-name {
  font-weight: 700;
  font-size: 14px;
  color: var(--text-main);
}

.ts-step-desc {
  font-size: 13px;
  color: var(--text-body);
}

/* ==========================================================================
   常见问题：路径问答 (FAQ)
   ========================================================================== */
.faq-accordion-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item.active {
  border-color: var(--color-pine);
}

.faq-question-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  background: none;
  border: none;
  text-align: left;
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  transition: var(--transition);
}

.faq-question-btn:hover {
  color: var(--color-pine);
}

.faq-q-prefix {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-pine);
  margin-right: 10px;
}

.faq-toggle-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--text-muted);
  transition: transform 0.25s ease;
}

.faq-item.active .faq-toggle-icon {
  transform: rotate(180deg);
  color: var(--color-pine);
}

.faq-answer-panel {
  display: none;
  padding: 0 24px 20px 24px;
  font-size: 14px;
  color: var(--text-body);
  line-height: 1.8;
  border-top: 1px solid var(--border-light);
  margin-top: 4px;
  padding-top: 16px;
}

.faq-item.active .faq-answer-panel {
  display: block;
}

/* ==========================================================================
   文章详情页排版 (Article Single Page)
   ========================================================================== */
.article-page-layout {
  padding-top: 40px;
  padding-bottom: 80px;
}

.article-container {
  max-width: var(--content-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.breadcrumb-separator {
  color: var(--border-color);
}

.article-header {
  margin-bottom: 32px;
}

.article-h1-title {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.35;
  margin-top: 10px;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.article-meta-info {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--text-muted);
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.article-summary-lead {
  font-size: 16px;
  color: var(--text-body);
  background-color: var(--bg-white);
  border-left: 3px solid var(--color-pine);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-top: 20px;
  line-height: 1.75;
}

/* GEO 快速结论 */
.quick-conclusion-box {
  background-color: var(--bg-green-light);
  border: 1px solid var(--border-pine);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 32px;
}

.quick-conclusion-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-pine-dark);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.quick-conclusion-text {
  font-size: 14px;
  color: var(--text-body);
  line-height: 1.7;
}

/* 本文目录 */
.article-toc-box {
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 40px;
}

.toc-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 14px;
}

.toc-list a {
  color: var(--text-body);
  display: inline-block;
}

.toc-list a:hover {
  color: var(--color-pine);
  padding-left: 4px;
}

/* 正文 Typography */
.article-body-content {
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 40px 48px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-body);
}

.article-body-content h2 {
  font-size: 24px;
  font-weight: 800;
  color: var(--text-main);
  margin-top: 40px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-light);
  scroll-margin-top: 90px;
}

.article-body-content h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 28px;
  margin-bottom: 12px;
  scroll-margin-top: 90px;
}

.article-body-content p {
  margin-bottom: 20px;
}

.article-body-content ul,
.article-body-content ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

.article-body-content ul li {
  list-style-type: disc;
  margin-bottom: 8px;
}

.article-body-content ol li {
  list-style-type: decimal;
  margin-bottom: 8px;
}

.article-body-content blockquote {
  background-color: var(--bg-light);
  border-left: 4px solid var(--color-pine);
  padding: 14px 20px;
  margin: 24px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: normal;
  color: var(--text-main);
}

.article-body-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  border: 1px solid var(--border-color);
  font-size: 14px;
}

.article-body-content th,
.article-body-content td {
  padding: 12px 16px;
  border: 1px solid var(--border-light);
  text-align: left;
}

.article-body-content th {
  background-color: var(--bg-light);
  font-weight: 700;
  color: var(--text-main);
}

/* 文章底部导航与相关阅读 */
.article-bottom-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 32px;
  margin-top: 40px;
  border-top: 1px solid var(--border-color);
}

.related-articles-box {
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-top: 40px;
}

.related-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.related-card {
  padding: 14px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  background-color: var(--bg-page);
  transition: var(--transition);
}

.related-card:hover {
  border-color: var(--color-pine);
  background-color: #fff;
}

.related-card h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}

.related-card p {
  font-size: 12px;
  color: var(--text-muted);
}

/* ==========================================================================
   分类归档页 (Category Pages)
   ========================================================================== */
.category-header-box {
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 36px 40px;
  margin-bottom: 32px;
}

.category-h1 {
  font-size: 28px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
}

.category-desc {
  font-size: 15px;
  color: var(--text-body);
  line-height: 1.8;
  max-width: 800px;
}

/* ==========================================================================
   普通信息页 (About, Terms, Privacy, Sitemap)
   ========================================================================== */
.static-page-card {
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 40px 48px;
  margin-bottom: 40px;
}

.static-h1 {
  font-size: 30px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.sitemap-group-box {
  margin-bottom: 28px;
}

.sitemap-group-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
  padding-left: 8px;
  border-left: 3px solid var(--color-pine);
}

.sitemap-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 10px;
  padding-left: 12px;
}

.sitemap-list li a {
  display: inline-block;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-page);
  color: var(--text-main);
  font-size: 14px;
}

.sitemap-list li a:hover {
  background-color: var(--bg-green-light);
  color: var(--color-pine-dark);
}

/* ==========================================================================
   Footer：浅灰绿、高度适中 (250px-320px Desktop)、友情链接严格置底右侧
   ========================================================================== */
.site-footer {
  background-color: var(--bg-footer);
  color: var(--text-footer);
  border-top: 1px solid var(--border-color);
  padding-top: 44px;
  padding-bottom: 24px;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 260px repeat(4, 1fr) 140px;
  gap: 24px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(24, 36, 31, 0.08);
}

.footer-brand-col {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-brand-name {
  font-size: 18px;
  font-weight: 800;
  color: var(--text-main);
}

.footer-brand-summary {
  font-size: 13px;
  color: var(--text-footer);
  line-height: 1.6;
}

.footer-col-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}

.footer-link-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-link-list a {
  font-size: 13px;
  color: var(--text-footer);
}

.footer-link-list a:hover {
  color: var(--color-pine-dark);
}

.btn-footer-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 16px;
  background-color: var(--color-pine);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.btn-footer-cta:hover {
  background-color: var(--color-pine-dark);
  color: #fff;
}

/* Footer 底层栏：左版权，右友情链接 */
.footer-bottom-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 20px;
  font-size: 13px;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 14px;
}

.copyright-text {
  font-size: 13px;
  color: var(--text-muted);
}

.friend-links-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.friend-links-title {
  font-size: 13px;
  color: var(--text-footer);
  font-weight: 600;
}

.friend-links-wrap a {
  color: var(--text-footer);
  font-size: 13px;
}

.friend-links-wrap a:hover {
  color: var(--color-pine-dark);
  text-decoration: underline;
}

/* ==========================================================================
   响应式断点测试 (1440, 1024, 768, 430, 390, 375)
   ========================================================================== */

/* 平板与小型桌面 (<= 1024px) */
@media (max-width: 1024px) {
  .path-split-system {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .path-origin-node::after {
    display: none;
  }

  .path-destinations-summary {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .knowledge-category-list {
    flex-direction: row;
    border-right: none;
    border-bottom: 1px solid var(--border-light);
    padding-right: 0;
    padding-bottom: 12px;
    overflow-x: auto;
  }

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

/* 平板坚屏与大屏手机 (<= 768px) */
@media (max-width: 768px) {
  .section-block {
    padding-top: 50px;
    padding-bottom: 50px;
  }

  .main-nav,
  .header-action {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .hero-headline {
    font-size: 28px;
  }

  .path-branch-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .branch-dest-link {
    justify-content: flex-start;
  }

  .path-step-flow {
    flex-direction: column;
    align-items: flex-start;
  }

  .flow-step-item {
    width: 100%;
  }

  .pricing-annual-standalone {
    flex-direction: column;
    align-items: flex-start;
  }

  .article-body-content {
    padding: 24px 20px;
  }

  .static-page-card {
    padding: 24px 20px;
  }

  .footer-top-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-bottom-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .friend-links-wrap {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
}

/* 移动端手机 (<= 430px, 390px, 375px) */
@media (max-width: 480px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .hero-headline {
    font-size: 24px;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .hero-cta-group a {
    width: 100%;
    justify-content: center;
  }

  /* 移动端套餐价格严格顺序：主力推荐 -> 标准 -> 轻量 -> 高流量 -> 长期 */
  .pricing-horizontal-axis {
    display: flex;
    flex-direction: column;
  }

  .pricing-plan-item.order-1-main { order: 1; }
  .pricing-plan-item.order-2-standard { order: 2; }
  .pricing-plan-item.order-3-light { order: 3; }
  .pricing-plan-item.order-4-high { order: 4; }

  .pricing-annual-standalone {
    order: 5;
  }

  .path-destinations-summary {
    grid-template-columns: 1fr;
  }

  .ts-step-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}

/* ==========================================================================
   减少动态偏好 (prefers-reduced-motion)
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}