/* ==========================================================================
   悠兔机场 (YouTu Cloud) - 第2套独立网站：动态刻度系统样式表
   核心概念：使用强度刻度 + 套餐流量选择 + 动态倍率知识 + 线路节点 + 网络排障
   ========================================================================== */

:root {
  /* 主色板配置 (遵循 75% 暖白/白, 15% 墨绿/蓝灰/主字, 10% 暖棕/陶土 比例) */
  --bg-main: #F9F8F4;
  --bg-card: #FFFFFF;
  --bg-secondary: #F2F0E9;
  --bg-sand: #F3EDE5;
  --bg-light-green: #EEF2EF;
  --bg-light-blue: #EEF1F3;

  --text-main: #202628;
  --text-body: #5E6567;
  --text-muted: #8A8F90;

  --color-green: #4E675C;
  --color-green-deep: #3F554B;
  --color-blue-gray: #526975;
  --color-blue-deep: #40545E;

  --color-brown: #A77955;
  --color-terracotta: #AE6F50;

  --border-color: #E2DED6;
  --border-light: #ECE8E0;

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  --header-height: 70px;
  --container-max: 1200px;
  --article-max: 820px;
}

*, *::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-family);
  background-color: var(--bg-main);
  color: var(--text-body);
  line-height: 1.8;
  font-size: 1.0625rem; /* ~17px */
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-green);
}

img, svg {
  vertical-align: middle;
  max-width: 100%;
}

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

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

/* 标头通用样式 */
.section-header {
  margin-bottom: 40px;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-green);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-label::before {
  content: "";
  display: inline-block;
  width: 12px;
  height: 2px;
  background-color: var(--color-green);
}

h1, h2, h3, h4 {
  color: var(--text-main);
  line-height: 1.35;
  font-weight: 700;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(2.25rem, 4vw, 3.25rem); /* 36px ~ 52px */
  margin-bottom: 20px;
}

h2 {
  font-size: clamp(1.75rem, 3vw, 2.25rem); /* 28px ~ 36px */
  margin-bottom: 16px;
}

h3 {
  font-size: 1.375rem; /* 22px */
  margin-bottom: 12px;
}

p {
  margin-bottom: 1.25rem;
}

/* 商业与站内通用按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 4px;
  transition: all 0.25s ease;
  white-space: nowrap;
}

.btn .arrow {
  display: inline-block;
  transition: transform 0.2s ease;
}

.btn:hover .arrow {
  transform: translateX(4px);
}

.btn-primary {
  background-color: var(--color-green);
  color: #FFFFFF;
  border: 1px solid var(--color-green);
}

.btn-primary:hover {
  background-color: var(--color-green-deep);
  color: #FFFFFF;
}

.btn-secondary {
  background-color: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

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

.btn-text {
  color: var(--color-green);
  padding: 8px 12px;
  font-weight: 600;
}

.btn-text:hover {
  color: var(--color-green-deep);
  text-decoration: underline;
}

/* ==========================================================================
   Header 导航栏 (66px - 72px)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-height);
  background-color: #FFFFFF;
  border-bottom: 1px solid var(--border-color);
  transition: background-color 0.2s ease, box-shadow 0.2s ease;
}

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

.header-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

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

.brand-title {
  font-size: 1.1875rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
}

.brand-subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-link {
  font-size: 0.9375rem;
  color: var(--text-body);
  position: relative;
  padding: 8px 2px;
  font-weight: 500;
  transition: color 0.2s ease;
}

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

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

/* 当前导航墨绿色短刻度线 */
.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 18px;
  height: 2px;
  background-color: var(--color-green);
}

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

.mobile-menu-btn {
  display: none;
  padding: 8px;
  color: var(--text-main);
  font-size: 0.9375rem;
  font-weight: 600;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
}

/* 移动端菜单抽屉 */
.mobile-nav-drawer {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #FFFFFF;
  border-top: 1px solid var(--border-color);
  padding: 24px;
  overflow-y: auto;
  z-index: 999;
}

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

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.mobile-nav-item a {
  display: block;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-main);
  padding: 8px 0;
  border-bottom: 1px solid var(--border-light);
}

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

/* ==========================================================================
   Hero 使用刻度系统 (Desktop: 630px-740px)
   ========================================================================== */
.hero-section {
  padding: 56px 0 64px 0;
  background-color: var(--bg-main);
  border-bottom: 1px solid var(--border-color);
}

.hero-meta-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background-color: var(--bg-sand);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-brown);
  margin-bottom: 20px;
}

.hero-headline {
  font-size: clamp(2.25rem, 4.5vw, 3.5rem);
  line-height: 1.25;
  color: var(--text-main);
  margin-bottom: 12px;
  font-weight: 800;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--color-blue-gray);
  font-weight: 600;
  margin-bottom: 20px;
}

.hero-description {
  font-size: 1.0625rem;
  color: var(--text-body);
  max-width: 820px;
  line-height: 1.8;
  margin-bottom: 32px;
}

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

/* 大型刻度阅读板 */
.scale-board {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  padding: 32px 36px;
  border-radius: 6px;
  position: relative;
}

.scale-board-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 24px;
}

.scale-board-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

.scale-board-disclaimer {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.scale-row-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.scale-row-item {
  display: grid;
  grid-template-columns: 180px 1fr 220px;
  align-items: center;
  gap: 24px;
  padding: 12px 16px;
  border-radius: 4px;
  transition: background-color 0.2s ease;
}

.scale-row-item:hover {
  background-color: var(--bg-secondary);
}

.scale-label-col {
  display: flex;
  flex-direction: column;
}

.scale-tier-name {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text-main);
}

.scale-tier-desc {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* 视觉刻度线组件 (仅用于层级视觉区分，非真实统计图，不按GB比例) */
.scale-track-wrap {
  position: relative;
  display: flex;
  align-items: center;
  height: 28px;
}

.scale-track-line {
  position: relative;
  height: 2px;
  background-color: var(--color-green);
  border-radius: 1px;
  transition: width 0.3s ease;
}

/* 4段视觉长度 (仅代表层级，不代表实际速度、延迟或GB数学比例) */
.scale-track-line.tier-1 { width: 30%; }
.scale-track-line.tier-2 { width: 52%; }
.scale-track-line.tier-3 { width: 75%; }
.scale-track-line.tier-4 { width: 96%; }

.scale-track-line::before {
  content: "";
  position: absolute;
  left: 0;
  top: -4px;
  width: 2px;
  height: 10px;
  background-color: var(--color-green);
}

.scale-track-line::after {
  content: "";
  position: absolute;
  right: 0;
  top: -5px;
  width: 2px;
  height: 12px;
  background-color: var(--color-green);
}

/* 内部刻度标记 */
.scale-ticks {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: space-around;
  pointer-events: none;
}

.scale-tick-notch {
  width: 1px;
  height: 6px;
  background-color: var(--border-color);
  align-self: center;
}

.scale-advice-col {
  text-align: right;
  font-size: 0.875rem;
  color: var(--color-blue-gray);
  font-weight: 600;
}

/* ==========================================================================
   01 / 使用强度模块
   ========================================================================== */
.section-block {
  padding: 80px 0;
  border-bottom: 1px solid var(--border-color);
}

.section-block.alt-bg {
  background-color: var(--bg-secondary);
}

.direct-answer-box {
  background-color: #FFFFFF;
  border-left: 3px solid var(--color-green);
  padding: 20px 24px;
  margin-bottom: 40px;
  border-radius: 0 4px 4px 0;
  box-shadow: 0 1px 3px rgba(0,0,0,0.02);
}

.direct-answer-box p {
  margin: 0;
  font-size: 1.0625rem;
  color: var(--text-main);
  font-weight: 500;
}

.intensity-scale-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.intensity-scale-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  padding: 24px 28px;
  border-radius: 4px;
  display: grid;
  grid-template-columns: 200px 1fr 240px;
  align-items: center;
  gap: 24px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.intensity-scale-card:hover {
  border-color: var(--color-green);
  transform: translateY(-2px);
}

.intensity-tag {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-main);
  display: block;
}

.intensity-subtitle {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.intensity-details {
  font-size: 0.9375rem;
  color: var(--text-body);
  line-height: 1.7;
}

.intensity-indicator {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
}

.intensity-bar {
  height: 4px;
  background-color: var(--border-color);
  width: 100px;
  position: relative;
  border-radius: 2px;
}

.intensity-bar-fill {
  height: 100%;
  background-color: var(--color-green);
  border-radius: 2px;
}

.intensity-bar-fill.lvl-1 { width: 25%; }
.intensity-bar-fill.lvl-2 { width: 50%; }
.intensity-bar-fill.lvl-3 { width: 75%; }
.intensity-bar-fill.lvl-4 { width: 100%; }

/* ==========================================================================
   02 / 套餐价格模块 (使用刻度价目表)
   ========================================================================== */
.pricing-scale-table {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  overflow: hidden;
}

.pricing-table-header {
  display: grid;
  grid-template-columns: 180px 1fr 200px 160px;
  padding: 16px 24px;
  background-color: var(--bg-sand);
  border-bottom: 1px solid var(--border-color);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-main);
}

.pricing-scale-row {
  display: grid;
  grid-template-columns: 180px 1fr 200px 160px;
  align-items: center;
  padding: 22px 24px;
  border-bottom: 1px solid var(--border-light);
  transition: background-color 0.2s ease;
}

.pricing-scale-row:last-child {
  border-bottom: none;
}

.pricing-scale-row:hover {
  background-color: #FAF9F6;
}

/* 官方确认长期方案突出 (浅绿色背景) */
.pricing-scale-row.confirmed-featured {
  background-color: var(--bg-light-green);
  border-top: 1px solid #D5E2D9;
  border-bottom: 1px solid #D5E2D9;
}

.pricing-scale-row.confirmed-featured:hover {
  background-color: #E6ECE8;
}

.tier-title-cell {
  font-weight: 700;
  color: var(--text-main);
  font-size: 1.0625rem;
}

.tier-badge-verified {
  display: inline-block;
  background-color: var(--color-green);
  color: #FFFFFF;
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 2px;
  margin-top: 4px;
}

.pricing-spec-cell {
  font-size: 0.9375rem;
  color: var(--text-body);
}

.pricing-rate-cell {
  font-size: 1.1875rem;
  font-weight: 700;
  color: var(--text-main);
}

.pricing-rate-cell .price-large {
  font-size: 1.75rem;
  color: var(--color-terracotta);
  font-weight: 800;
}

.pricing-rate-cell .price-period {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: normal;
}

/* ==========================================================================
   03 / 动态倍率模块
   ========================================================================== */
.rate-scale-sequence {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin: 32px 0 40px 0;
}

.rate-step-item {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  padding: 20px;
  border-radius: 4px;
  position: relative;
}

.rate-step-num {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-brown);
  margin-bottom: 8px;
}

.rate-step-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.rate-step-line {
  height: 2px;
  background-color: var(--color-blue-gray);
  margin-bottom: 12px;
  width: 40px;
}

.rate-step-desc {
  font-size: 0.875rem;
  color: var(--text-body);
  line-height: 1.6;
}

.rate-qa-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.rate-qa-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  padding: 24px;
  border-radius: 4px;
}

.rate-qa-card h3 {
  font-size: 1.125rem;
  color: var(--text-main);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.rate-qa-card h3::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  background-color: var(--color-green);
  border-radius: 50%;
}

.rate-qa-card p {
  font-size: 0.9375rem;
  color: var(--text-body);
  margin: 0;
  line-height: 1.7;
}

/* ==========================================================================
   04 / 节点地区模块 (横向刻度条，无地图/无测速排行榜)
   ========================================================================== */
.node-scale-rows {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.node-scale-item {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  padding: 24px 28px;
  border-radius: 4px;
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 32px;
  align-items: center;
}

.node-region-header {
  border-right: 1px solid var(--border-light);
  padding-right: 20px;
}

.node-region-name {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--text-main);
}

.node-region-scope {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.node-factors-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.node-factor-box {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.node-factor-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.node-factor-value {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-main);
}

.node-factor-scale {
  height: 2px;
  background-color: var(--border-color);
  width: 100%;
  position: relative;
  margin-top: 4px;
}

.node-factor-scale-tick {
  height: 100%;
  background-color: var(--color-green);
}

/* ==========================================================================
   05 / 线路知识表格 (纯净无Excel网格感)
   ========================================================================== */
.line-tech-table-wrap {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  overflow-x: auto;
}

.line-tech-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.line-tech-table th {
  background-color: var(--bg-sand);
  padding: 16px 20px;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-main);
  border-bottom: 1px solid var(--border-color);
}

.line-tech-table td {
  padding: 18px 20px;
  font-size: 0.9375rem;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-body);
  vertical-align: top;
}

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

.line-tech-table tr:hover td {
  background-color: #FAF9F6;
}

.tech-name {
  font-weight: 700;
  color: var(--text-main);
  display: block;
}

.tech-badge {
  font-size: 0.75rem;
  color: var(--color-brown);
  display: inline-block;
  margin-top: 2px;
}

/* ==========================================================================
   06 / AI 工具刻度 & 07 / 流媒体刻度
   ========================================================================== */
.intensity-columns-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}

.intensity-col-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  padding: 28px 24px;
  border-radius: 4px;
  position: relative;
}

.intensity-col-card .scale-line-indicator {
  height: 3px;
  background-color: var(--color-green);
  margin-bottom: 16px;
  border-radius: 1px;
}

.intensity-col-card.lvl-short .scale-line-indicator { width: 35%; }
.intensity-col-card.lvl-medium .scale-line-indicator { width: 65%; }
.intensity-col-card.lvl-long .scale-line-indicator { width: 100%; }

.intensity-col-card h3 {
  font-size: 1.1875rem;
  margin-bottom: 8px;
}

.platform-pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.platform-pill {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-main);
  background-color: var(--bg-secondary);
  padding: 4px 10px;
  border-radius: 3px;
  border: 1px solid var(--border-color);
}

.notice-disclaimer {
  background-color: var(--bg-sand);
  border: 1px solid var(--border-color);
  padding: 16px 20px;
  border-radius: 4px;
  font-size: 0.875rem;
  color: var(--text-body);
}

/* ==========================================================================
   08 / 客户端设备刻度
   ========================================================================== */
.client-scale-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.client-scale-row {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  padding: 20px 24px;
  border-radius: 4px;
  display: grid;
  grid-template-columns: 160px 1fr 200px;
  align-items: center;
  gap: 24px;
}

.client-os-name {
  font-size: 1.1875rem;
  font-weight: 700;
  color: var(--text-main);
}

.client-points {
  font-size: 0.9375rem;
  color: var(--text-body);
}

/* ==========================================================================
   09 / 悠兔机场深度评测引导区
   ========================================================================== */
.review-feature-box {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  padding: 36px 40px;
  border-radius: 6px;
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 40px;
  align-items: center;
}

.review-outline-ticks {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 20px 0;
}

.review-outline-ticks li {
  font-size: 0.9375rem;
  color: var(--text-body);
  display: flex;
  align-items: center;
  gap: 8px;
}

.review-outline-ticks li::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 1px;
  background-color: var(--color-green);
}

/* ==========================================================================
   10 / 教程刻度目录 (非九宫格Card)
   ========================================================================== */
.tutorial-scale-directory {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.directory-category-row {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  padding: 24px 28px;
  border-radius: 4px;
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 32px;
}

.dir-cat-header {
  border-right: 1px solid var(--border-light);
  padding-right: 20px;
}

.dir-cat-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}

.dir-cat-tick {
  width: 24px;
  height: 2px;
  background-color: var(--color-green);
  margin-bottom: 12px;
}

.dir-cat-desc {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.dir-articles-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.dir-article-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-light);
}

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

.dir-article-link {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
}

.dir-article-link:hover {
  color: var(--color-green);
}

.dir-article-meta {
  font-size: 0.8125rem;
  color: var(--text-muted);
  white-space: nowrap;
}

/* ==========================================================================
   11 / 网络排障刻度 (纵向检查刻度)
   ========================================================================== */
.troubleshoot-scale-vertical {
  display: flex;
  flex-direction: column;
  position: relative;
  gap: 16px;
}

.troubleshoot-step-item {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  padding: 20px 24px;
  border-radius: 4px;
  display: grid;
  grid-template-columns: 80px 200px 1fr 240px;
  gap: 20px;
  align-items: center;
}

.ts-step-num {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-brown);
}

.ts-step-name {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text-main);
}

.ts-step-symptom {
  font-size: 0.9375rem;
  color: var(--text-body);
}

.ts-step-advice {
  font-size: 0.875rem;
  color: var(--color-blue-gray);
  font-weight: 500;
  background-color: var(--bg-secondary);
  padding: 8px 12px;
  border-radius: 4px;
}

/* ==========================================================================
   12 / 常见问题 (问答刻度)
   ========================================================================== */
.faq-scale-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-scale-item {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  overflow: hidden;
}

.faq-trigger {
  width: 100%;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  text-align: left;
  background: none;
  cursor: pointer;
}

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

.faq-index {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-green);
  width: 40px;
}

.faq-question-text {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text-main);
}

.faq-icon {
  font-size: 1.25rem;
  color: var(--text-muted);
  transition: transform 0.25s ease;
  line-height: 1;
}

.faq-scale-item.open .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 24px 20px 80px;
  font-size: 0.9375rem;
  color: var(--text-body);
  line-height: 1.8;
  border-top: 1px dashed var(--border-light);
  margin-top: 4px;
  padding-top: 16px;
}

/* 当JS关闭时，所有FAQ回答天然可读，避免依赖JS生成 */
.faq-answer.no-js-visible {
  display: block;
}

/* ==========================================================================
   Footer 页脚 (250px-320px 紧凑浅色，非大黑底)
   ========================================================================== */
.site-footer {
  background-color: #F1EFE9;
  border-top: 1px solid var(--border-color);
  padding: 48px 0 24px 0;
  color: #4C5556;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 36px;
}

.footer-brand-col h4 {
  font-size: 1.125rem;
  color: var(--text-main);
  margin-bottom: 8px;
}

.footer-brand-desc {
  font-size: 0.8125rem;
  color: #6C7475;
  line-height: 1.6;
  margin-bottom: 16px;
}

.footer-col h5 {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
  position: relative;
  padding-bottom: 6px;
}

.footer-col h5::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 14px;
  height: 1px;
  background-color: var(--color-green);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links li a {
  font-size: 0.8125rem;
  color: #586061;
}

.footer-links li a:hover {
  color: var(--color-green);
}

.footer-bottom-bar {
  border-top: 1px solid var(--border-color);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.8125rem;
}

.footer-copyright {
  color: #6C7475;
}

.footer-friendly-links {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-friendly-links span {
  color: #8A8F90;
}

.footer-friendly-links a {
  color: #586061;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-friendly-links a:hover {
  color: var(--color-green);
}

/* ==========================================================================
   文章页面与分类页面样式
   ========================================================================== */
.page-container {
  padding: 40px 0 80px 0;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

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

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

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

.article-layout {
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: 48px;
  align-items: start;
}

.article-layout.no-sidebar {
  grid-template-columns: 1fr;
  max-width: var(--article-max);
  margin: 0 auto;
}

.article-main {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 40px 48px;
}

.article-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 24px;
  margin-bottom: 32px;
}

.article-category-badge {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-green);
  background-color: var(--bg-light-green);
  padding: 4px 10px;
  border-radius: 3px;
  margin-bottom: 12px;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.8125rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  margin-top: 16px;
}

.article-scale-hint {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  background-color: var(--bg-sand);
  border-radius: 4px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-brown);
  margin-bottom: 24px;
}

.quick-conclusion-box {
  background-color: var(--bg-light-green);
  border: 1px solid #D1DFD6;
  border-left: 4px solid var(--color-green);
  padding: 20px 24px;
  border-radius: 0 4px 4px 0;
  margin-bottom: 32px;
}

.quick-conclusion-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-green-deep);
  margin-bottom: 8px;
}

.quick-conclusion-box p {
  margin: 0;
  font-size: 1rem;
  color: var(--text-main);
  line-height: 1.75;
}

/* 文章正文排版 */
.article-content h2 {
  font-size: 1.5rem;
  margin-top: 40px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-light);
}

.article-content h3 {
  font-size: 1.25rem;
  margin-top: 28px;
  margin-bottom: 12px;
}

.article-content ul, .article-content ol {
  margin-left: 24px;
  margin-bottom: 1.5rem;
}

.article-content li {
  margin-bottom: 8px;
}

.article-content blockquote {
  border-left: 3px solid var(--color-brown);
  padding: 12px 20px;
  background-color: var(--bg-secondary);
  margin: 24px 0;
  color: var(--text-body);
}

/* 目录 (TOC) Desktop Sticky */
.article-toc-sidebar {
  position: sticky;
  top: calc(var(--header-height) + 24px);
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  padding: 20px;
  border-radius: 4px;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}

.toc-title {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-light);
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toc-list li a {
  font-size: 0.8125rem;
  color: var(--text-body);
  display: block;
  line-height: 1.4;
}

.toc-list li a:hover {
  color: var(--color-green);
}

/* 相关阅读 & 内链闭环 */
.article-footer-nav {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

.related-articles-box {
  margin-top: 32px;
}

.related-articles-box h4 {
  font-size: 1.125rem;
  margin-bottom: 16px;
}

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

.related-list li a {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9375rem;
  color: var(--text-main);
  font-weight: 600;
}

.related-list li a::before {
  content: "→";
  color: var(--color-green);
}

.related-list li a:hover {
  color: var(--color-green);
}

/* 分类页文章列表 */
.category-intro-box {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  padding: 28px 32px;
  border-radius: 6px;
  margin-bottom: 32px;
}

.cat-article-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  padding: 24px 28px;
  border-radius: 4px;
  margin-bottom: 16px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.cat-article-card:hover {
  border-color: var(--color-green);
  transform: translateY(-2px);
}

.cat-card-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 10px;
}

.cat-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
}

.cat-card-meta {
  font-size: 0.8125rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.cat-card-summary {
  font-size: 0.9375rem;
  color: var(--text-body);
  line-height: 1.7;
  margin-bottom: 16px;
}

/* ==========================================================================
   Prefers-Reduced-Motion 适配
   ========================================================================== */
@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;
  }
  .btn:hover .arrow,
  .intensity-scale-card:hover,
  .cat-article-card:hover {
    transform: none !important;
  }
}

/* ==========================================================================
   响应式断点适配 (375px, 390px, 430px, 768px, 1024px, 1440px)
   ========================================================================== */
@media (max-width: 1024px) {
  .header-nav {
    display: none;
  }
  .mobile-menu-btn {
    display: inline-flex;
  }
  .footer-top-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .article-layout {
    grid-template-columns: 1fr;
  }
  .article-toc-sidebar {
    display: none;
  }
  .rate-scale-sequence {
    grid-template-columns: repeat(2, 1fr);
  }
  .node-factors-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }
  .hero-section {
    padding: 36px 0 44px 0;
  }
  .hero-headline {
    font-size: 2rem;
  }
  .scale-board {
    padding: 20px 16px;
  }
  .scale-row-item {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 12px 8px;
  }
  .scale-advice-col {
    text-align: left;
  }
  .intensity-scale-card {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 18px 20px;
  }
  .intensity-indicator {
    justify-content: flex-start;
  }
  .pricing-table-header {
    display: none;
  }
  .pricing-scale-row {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 20px 16px;
  }
  .rate-scale-sequence {
    grid-template-columns: 1fr;
  }
  .rate-qa-list {
    grid-template-columns: 1fr;
  }
  .node-scale-item {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 20px 16px;
  }
  .node-region-header {
    border-right: none;
    border-bottom: 1px solid var(--border-light);
    padding-right: 0;
    padding-bottom: 12px;
  }
  .node-factors-grid {
    grid-template-columns: 1fr;
  }
  .intensity-columns-grid {
    grid-template-columns: 1fr;
  }
  .client-scale-row {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 16px;
  }
  .review-feature-box {
    grid-template-columns: 1fr;
    padding: 24px 20px;
  }
  .directory-category-row {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 20px 16px;
  }
  .dir-cat-header {
    border-right: none;
    border-bottom: 1px solid var(--border-light);
    padding-right: 0;
    padding-bottom: 12px;
  }
  .troubleshoot-step-item {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 16px;
  }
  .faq-trigger {
    padding: 16px;
  }
  .faq-answer {
    padding: 0 16px 16px 16px;
  }
  .footer-top-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .footer-bottom-bar {
    flex-direction: column;
    align-items: flex-start;
  }
  .article-main {
    padding: 24px 18px;
  }
}

@media (max-width: 430px) {
  .hero-headline {
    font-size: 1.75rem;
  }
  .hero-actions {
    flex-direction: column;
  }
  .hero-actions .btn {
    width: 100%;
  }
}