/* ==================================================
   SuperBiu 机场 - 动势切片系统 样式表
   Motion Slice Design System
   ================================================== */

:root {
  --bg-main: #F7F8F7;
  --bg-white: #FFFFFF;
  --bg-secondary: #F1F3F2;
  --text-main: #1B2226;
  --text-body: #59636A;
  --text-muted: #858E92;
  --blue-cool: #3D6475;
  --blue-dark: #31515F;
  --teal: #46786C;
  --teal-dark: #365F55;
  --orange-terracotta: #C56F4E;
  --blue-light: #EDF2F4;
  --green-light: #EDF3F0;
  --orange-light: #F7ECE7;
  --border-color: #DDE3E3;
  --border-focus: #3D6475;
  
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  --font-mono: SFMono-Regular, Consolas, "Liberation Mono", Menlo, Courier, monospace;

  --container-max: 1200px;
  --content-max: 820px;
  --header-height: 70px;
  --transition-speed: 0.22s;
  --ease-momentum: cubic-bezier(0.16, 1, 0.3, 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-family);
  background-color: var(--bg-main);
  color: var(--text-body);
  line-height: 1.8;
  font-size: 1.0625rem; /* ~17px */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* 链接与排版 */
a {
  color: var(--blue-cool);
  text-decoration: none;
  transition: color var(--transition-speed) ease, transform var(--transition-speed) ease;
}

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

h1, h2, h3, h4, h5, h6 {
  color: var(--text-main);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2rem, 3.2vw + 1rem, 3.25rem); /* 32px - 52px */
}

h2 {
  font-size: clamp(1.625rem, 2vw + 0.8rem, 2.125rem); /* 26px - 34px */
}

h3 {
  font-size: clamp(1.25rem, 1.2vw + 0.6rem, 1.5rem); /* 20px - 24px */
}

p {
  margin-bottom: 1.25rem;
}

p:last-child {
  margin-bottom: 0;
}

ul, ol {
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
}

li {
  margin-bottom: 0.5rem;
}

code, pre {
  font-family: var(--font-mono);
}

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

.article-container {
  width: 100%;
  max-width: var(--content-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* 动势切片通用几何修饰 */
.slice-bevel-r {
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}

.slice-bevel-l {
  clip-path: polygon(14px 0, 100% 0, 100% 100%, 0 100%, 0 14px);
}

.slice-slant-r {
  clip-path: polygon(0 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
}

/* 商业转化CTA按钮与普通按钮 */
.cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background-color: var(--teal);
  color: #FFFFFF !important;
  font-weight: 600;
  font-size: 0.9375rem;
  padding: 10px 22px;
  border-radius: 0;
  border: 1px solid var(--teal-dark);
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-speed) var(--ease-momentum);
  text-decoration: none;
}

.cta-button:hover {
  background-color: var(--teal-dark);
  transform: translateX(3px);
  color: #FFFFFF !important;
}

.cta-button .arrow {
  display: inline-block;
  transition: transform var(--transition-speed) var(--ease-momentum);
}

.cta-button:hover .arrow {
  transform: translateX(4px);
}

.cta-button-secondary {
  background-color: var(--bg-white);
  color: var(--blue-cool) !important;
  border: 1px solid var(--border-color);
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
}

.cta-button-secondary:hover {
  background-color: var(--blue-light);
  color: var(--blue-dark) !important;
  border-color: var(--blue-cool);
  transform: translateX(3px);
}

.cta-button-terracotta {
  background-color: var(--orange-terracotta);
  border-color: #A9583A;
  color: #FFFFFF !important;
}

.cta-button-terracotta:hover {
  background-color: #B15E3F;
  color: #FFFFFF !important;
}

.text-link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  color: var(--blue-cool);
  font-size: 0.9375rem;
}

.text-link-arrow:hover {
  color: var(--teal);
  transform: translateX(2px);
}

.text-link-arrow .arrow {
  transition: transform var(--transition-speed) ease;
}

.text-link-arrow:hover .arrow {
  transform: translateX(3px);
}

/* ==================================================
   Header 导航栏
   ================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-height);
  background-color: var(--bg-white);
  border-bottom: 1px solid var(--border-color);
}

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

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

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

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

.brand-name {
  font-size: 1.1875rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.brand-subtext {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.2;
  margin-top: 2px;
}

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

.nav-link {
  font-size: 0.875rem;
  color: var(--text-body);
  font-weight: 500;
  padding: 6px 2px;
  position: relative;
  transition: color var(--transition-speed) ease;
}

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

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

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--blue-cool);
  transform: skewX(-20deg);
}

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

/* 移动端菜单按钮 */
.mobile-menu-btn {
  display: none;
  background: none;
  border: 1px solid var(--border-color);
  padding: 6px 12px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - 6px) 0, 100% 6px, 100% 100%, 0 100%);
}

.mobile-menu-drawer {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: 100%;
  height: calc(100vh - var(--header-height));
  background-color: var(--bg-white);
  border-top: 1px solid var(--border-color);
  padding: 24px;
  overflow-y: auto;
  z-index: 999;
}

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

.mobile-nav-list {
  list-style: none;
  padding: 0;
  margin: 0 0 24px 0;
}

.mobile-nav-item {
  border-bottom: 1px solid var(--border-color);
  margin: 0;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 4px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
}

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

/* ==================================================
   Hero 动势切片
   ================================================== */
.hero-section {
  padding: 48px 0 56px 0;
  background: linear-gradient(180deg, var(--bg-white) 0%, var(--bg-main) 100%);
  border-bottom: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
}

.hero-meta-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--blue-light);
  color: var(--blue-cool);
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 4px 12px;
  border-left: 3px solid var(--blue-cool);
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.hero-brand-tag {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--teal-dark);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.hero-title {
  margin-bottom: 14px;
}

.hero-slogan {
  font-size: clamp(1.5rem, 2.5vw + 0.8rem, 2.5rem);
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.25;
  margin-bottom: 10px;
}

.hero-subtitle {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--teal);
  margin-bottom: 16px;
}

.hero-description {
  max-width: 860px;
  font-size: 1.0625rem;
  color: var(--text-body);
  line-height: 1.8;
  margin-bottom: 28px;
}

.hero-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  margin-bottom: 44px;
}

/* 4条动势宽信息切片 */
.hero-slices-wrapper {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 10px;
}

.hero-slice-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  padding: 18px 24px;
  min-height: 72px;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
  transition: all var(--transition-speed) var(--ease-momentum);
  position: relative;
  text-decoration: none;
}

.hero-slice-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background-color: var(--teal);
  transition: width var(--transition-speed) ease;
}

.hero-slice-item:hover {
  transform: translateX(4px);
  border-color: var(--teal);
  background-color: #FCFDFD;
}

.hero-slice-item:hover::before {
  width: 6px;
}

/* 不对称宽度设计 */
.hero-slice-01 { width: 92%; }
.hero-slice-02 { width: 84%; }
.hero-slice-03 { width: 96%; }
.hero-slice-04 { width: 78%; }

.slice-left {
  display: flex;
  align-items: center;
  gap: 20px;
}

.slice-num {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--teal-dark);
  background-color: var(--green-light);
  padding: 4px 10px;
  border-left: 2px solid var(--teal);
}

.slice-heading {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
}

.slice-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.slice-content {
  font-size: 0.9375rem;
  color: var(--text-body);
  font-weight: 500;
  padding: 0 16px;
}

.slice-action {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--blue-cool);
  white-space: nowrap;
}

/* ==================================================
   通用 Section 规范
   ================================================== */
.page-section {
  padding: 64px 0;
  border-bottom: 1px solid var(--border-color);
}

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

.section-header-block {
  margin-bottom: 32px;
}

.section-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--teal);
  letter-spacing: 0.05em;
  margin-bottom: 6px;
  background-color: var(--green-light);
  padding: 2px 8px;
  border-left: 2px solid var(--teal);
}

.section-title {
  margin-bottom: 12px;
}

.section-intro-text {
  font-size: 1.0625rem;
  color: var(--text-body);
  max-width: 860px;
  line-height: 1.8;
}

/* ==================================================
   01 / 套餐选择 - 流量切片
   ================================================== */
.traffic-slice-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.traffic-slice-row {
  display: grid;
  grid-template-columns: 140px 180px 1fr 140px;
  align-items: center;
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  padding: 18px 24px;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  transition: all var(--transition-speed) ease;
}

.traffic-slice-row:hover {
  transform: translateX(3px);
  border-color: var(--blue-cool);
  background-color: #FAFCFC;
}

.traffic-slice-volume {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
}

.traffic-slice-intensity {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--blue-cool);
  background-color: var(--blue-light);
  padding: 3px 10px;
  width: fit-content;
}

.traffic-slice-scenarios {
  font-size: 0.9375rem;
  color: var(--text-body);
}

.traffic-slice-action {
  text-align: right;
}

/* ==================================================
   02 / 地区切片目录
   ================================================== */
.node-slice-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.node-slice-row {
  display: grid;
  grid-template-columns: 80px 140px 1.4fr 1.4fr 140px;
  align-items: center;
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  padding: 18px 24px;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  transition: all var(--transition-speed) ease;
}

.node-slice-row:hover {
  transform: translateX(3px);
  border-color: var(--teal);
}

.node-slice-id {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--teal);
  font-size: 1rem;
}

.node-slice-region {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-main);
}

.node-slice-desc {
  font-size: 0.9375rem;
  color: var(--text-body);
  padding-right: 16px;
}

.node-slice-factor {
  font-size: 0.875rem;
  color: var(--text-muted);
  padding-right: 16px;
}

.node-slice-action {
  text-align: right;
}

/* ==================================================
   03 / 线路怎么理解 - 切片表格
   ================================================== */
.line-table-wrapper {
  overflow-x: auto;
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}

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

.line-slice-table th {
  background-color: var(--bg-secondary);
  color: var(--text-main);
  font-weight: 700;
  font-size: 0.9375rem;
  padding: 16px 20px;
  border-bottom: 2px solid var(--border-color);
}

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

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

.line-slice-table tr:hover td {
  background-color: #FAFCFC;
}

.line-code-badge {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--blue-cool);
  background-color: var(--blue-light);
  padding: 2px 8px;
  font-size: 0.875rem;
  display: inline-block;
  margin-right: 8px;
}

/* ==================================================
   04 / AI工具切片 & 05 / 流媒体切片
   ================================================== */
.entity-slice-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.entity-slice-row {
  display: grid;
  grid-template-columns: 80px 160px 1.4fr 1.2fr 130px;
  align-items: center;
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  padding: 16px 22px;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  transition: all var(--transition-speed) ease;
}

.entity-slice-row:hover {
  transform: translateX(3px);
  border-color: var(--blue-cool);
}

.entity-slice-code {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.entity-slice-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
}

.entity-slice-factor {
  font-size: 0.9375rem;
  color: var(--text-body);
  padding-right: 14px;
}

.entity-slice-direction {
  font-size: 0.875rem;
  color: var(--teal);
  background-color: var(--green-light);
  padding: 3px 8px;
  width: fit-content;
}

.entity-slice-action {
  text-align: right;
}

/* ==================================================
   06 / 客户端设备切片
   ================================================== */
.device-slice-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.device-slice-row {
  display: grid;
  grid-template-columns: 140px 1.4fr 1.6fr 140px;
  align-items: center;
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  padding: 18px 24px;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  transition: all var(--transition-speed) ease;
}

.device-slice-row:hover {
  transform: translateX(3px);
  border-color: var(--teal);
}

.device-slice-name {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-main);
}

.device-slice-usage {
  font-size: 0.9375rem;
  color: var(--text-body);
  padding-right: 16px;
}

.device-slice-ops {
  font-size: 0.875rem;
  color: var(--text-muted);
  padding-right: 16px;
}

.device-slice-action {
  text-align: right;
}

/* ==================================================
   07 / 完整价目 - 切片价目带 (核心商业区)
   ================================================== */
.pricing-slice-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.pricing-slice-row {
  display: grid;
  grid-template-columns: 60px 140px 140px 1fr 140px 150px;
  align-items: center;
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  padding: 18px 24px;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
  transition: all var(--transition-speed) ease;
  position: relative;
}

.pricing-slice-row:hover {
  transform: translateX(3px);
  border-color: var(--blue-cool);
}

.pricing-slice-id {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.0625rem;
  color: var(--text-muted);
}

.pricing-slice-name {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-main);
}

.pricing-slice-data {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  color: var(--blue-cool);
}

.pricing-slice-suit {
  font-size: 0.9375rem;
  color: var(--text-body);
  padding-right: 12px;
}

.pricing-slice-price {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1;
}

.pricing-slice-price span {
  font-size: 0.8125rem;
  font-weight: normal;
  color: var(--text-muted);
}

.pricing-slice-action {
  text-align: right;
}

/* 主力档突出样式 */
.pricing-featured-row {
  background-color: var(--green-light);
  border-left: 3px solid var(--teal);
  border-color: #C6DCD5;
}

.pricing-row-01 { order: 1; }
.pricing-row-02 { order: 2; }
.pricing-row-03 { order: 3; }
.pricing-row-04 { order: 4; }
.pricing-row-05 { order: 5; }

@media (max-width: 768px) {
  .pricing-row-03 { order: 1; } /* 主力档置顶 */
  .pricing-row-02 { order: 2; } /* 日常档 */
  .pricing-row-01 { order: 3; } /* 轻享档 */
  .pricing-row-04 { order: 4; } /* 高频档 */
  .pricing-row-05 { order: 5; } /* 长期档 */
}

.pricing-featured-row:hover {
  border-color: var(--teal);
  background-color: #E6EFEA;
}

.pricing-featured-tag {
  display: inline-block;
  background-color: var(--orange-terracotta);
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 8px;
  margin-left: 8px;
  vertical-align: middle;
  clip-path: polygon(0 0, calc(100% - 4px) 0, 100% 4px, 100% 100%, 0 100%);
}

.pricing-featured-row .pricing-slice-price {
  color: var(--teal-dark);
  font-size: 1.75rem;
}

/* 快速选择参考指示条 */
.quick-select-strip {
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  padding: 16px 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  font-size: 0.875rem;
  color: var(--text-body);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
}

.quick-select-label {
  font-weight: 700;
  color: var(--text-main);
}

.quick-select-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.quick-select-item strong {
  color: var(--blue-cool);
}

/* ==================================================
   08 / SuperBiu评测导读切片
   ================================================== */
.review-preview-slice {
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  padding: 28px 32px;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
  border-left: 4px solid var(--teal);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.review-preview-title {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--text-main);
}

.review-preview-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.review-preview-desc {
  font-size: 1rem;
  color: var(--text-body);
  line-height: 1.8;
}

.review-preview-points {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
  margin: 8px 0;
}

.review-point-item {
  background-color: var(--bg-main);
  padding: 10px 14px;
  font-size: 0.875rem;
  border-left: 2px solid var(--blue-cool);
  color: var(--text-body);
}

/* ==================================================
   09 / 精选教程 - 教程切片列表
   ================================================== */
.tutorial-slice-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.tutorial-slice-row {
  display: grid;
  grid-template-columns: 80px 120px 1.8fr 1fr 100px 120px;
  align-items: center;
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  padding: 16px 24px;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  transition: all var(--transition-speed) ease;
  text-decoration: none;
}

.tutorial-slice-row:hover {
  transform: translateX(3px);
  border-color: var(--blue-cool);
  background-color: #FAFCFC;
}

.tutorial-slice-id {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--teal);
}

.tutorial-slice-category {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--blue-cool);
  background-color: var(--blue-light);
  padding: 2px 8px;
  width: fit-content;
}

.tutorial-slice-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  padding-right: 16px;
}

.tutorial-slice-excerpt {
  font-size: 0.875rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding-right: 16px;
}

.tutorial-slice-time {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.tutorial-slice-action {
  text-align: right;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--blue-cool);
}

/* ==================================================
   10 / 网络排障切片
   ================================================== */
.trouble-slice-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.trouble-slice-row {
  display: grid;
  grid-template-columns: 80px 150px 1.8fr 1.2fr;
  align-items: center;
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  padding: 16px 24px;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  transition: all var(--transition-speed) ease;
}

.trouble-slice-row:hover {
  transform: translateX(3px);
  border-color: var(--teal);
}

.trouble-slice-num {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--teal-dark);
}

.trouble-slice-scope {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
}

.trouble-slice-focus {
  font-size: 0.9375rem;
  color: var(--text-body);
  padding-right: 16px;
}

.trouble-slice-next {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ==================================================
   11 / 常见问题 - 问答切片
   ================================================== */
.faq-slice-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.faq-slice-item {
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  transition: border-color var(--transition-speed) ease;
}

.faq-slice-item[open] {
  border-color: var(--blue-cool);
}

.faq-slice-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.faq-slice-header::-webkit-details-marker {
  display: none;
}

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

.faq-id {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--teal);
  background-color: var(--green-light);
  padding: 2px 8px;
}

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

.faq-toggle-icon {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--blue-cool);
  transition: transform var(--transition-speed) ease;
}

.faq-slice-item[open] .faq-toggle-icon {
  transform: rotate(45deg);
}

.faq-slice-body {
  padding: 0 24px 20px 64px;
  font-size: 0.9375rem;
  color: var(--text-body);
  line-height: 1.8;
  border-top: 1px dashed var(--border-color);
  padding-top: 16px;
}

/* ==================================================
   文章详情页与分类页风格
   ================================================== */
.page-header-block {
  padding: 40px 0 32px 0;
  background-color: var(--bg-white);
  border-bottom: 1px solid var(--border-color);
}

.breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

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

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

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

.article-meta-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border-color);
}

.article-content-wrapper {
  padding: 48px 0 64px 0;
}

.article-main-card {
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  padding: 40px 48px;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}

.quick-conclusion-box {
  background-color: var(--green-light);
  border-left: 4px solid var(--teal);
  padding: 20px 24px;
  margin-bottom: 32px;
}

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

.toc-box {
  background-color: var(--bg-main);
  border: 1px solid var(--border-color);
  padding: 20px 24px;
  margin-bottom: 36px;
}

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

.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.toc-list li {
  margin-bottom: 6px;
}

.toc-list a {
  font-size: 0.9375rem;
  color: var(--text-body);
}

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

.article-body h2 {
  margin-top: 44px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.article-body h3 {
  margin-top: 28px;
  margin-bottom: 12px;
}

.article-body p {
  margin-bottom: 1.25rem;
}

.article-nav-links {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

.related-articles-box {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 2px solid var(--border-color);
}

.related-articles-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
}

/* ==================================================
   Footer 页脚
   ================================================== */
.site-footer {
  background-color: #EEF1F0;
  color: #475258;
  border-top: 1px solid var(--border-color);
  padding: 56px 0 24px 0;
  font-size: 0.9375rem;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 40px;
}

.footer-brand-title {
  font-size: 1.1875rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.footer-brand-desc {
  font-size: 0.875rem;
  color: #59636A;
  margin-bottom: 16px;
  line-height: 1.6;
}

.footer-col-title {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 14px;
  letter-spacing: 0.02em;
}

.footer-links-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links-list li {
  margin-bottom: 8px;
}

.footer-links-list a {
  color: #475258;
  font-size: 0.875rem;
}

.footer-links-list a:hover {
  color: var(--teal);
}

.footer-bottom-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid #D5DCDB;
  font-size: 0.8125rem;
  color: #6C777D;
}

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

.footer-friends-links a {
  color: #475258;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-friends-links a:hover {
  color: var(--teal);
}

/* ==================================================
   媒体查询与响应式断点适配
   ================================================== */
@media (max-width: 1024px) {
  .hero-slice-01,
  .hero-slice-02,
  .hero-slice-03,
  .hero-slice-04 {
    width: 100%;
  }

  .nav-desktop {
    display: none;
  }

  .mobile-menu-btn {
    display: inline-block;
  }

  .pricing-slice-row {
    grid-template-columns: 50px 120px 120px 1fr 120px 140px;
    padding: 16px 18px;
  }

  .footer-top-grid {
    grid-template-columns: 1fr 1fr 1fr;
    gap: 28px;
  }

  .footer-top-grid .footer-col-brand {
    grid-column: span 3;
  }

  .node-slice-row {
    grid-template-columns: 60px 110px 1.2fr 1fr 110px;
    padding: 14px 18px;
  }

  .tutorial-slice-row {
    grid-template-columns: 60px 100px 1.5fr 1fr 100px;
  }
  
  .tutorial-slice-time {
    display: none;
  }
}

@media (max-width: 768px) {
  .hero-section {
    padding: 32px 0 40px 0;
  }

  .page-section {
    padding: 44px 0;
  }

  /* 移动端斜切幅度收缩至 6px-10px */
  .slice-bevel-r,
  .hero-slice-item,
  .traffic-slice-row,
  .node-slice-row,
  .entity-slice-row,
  .device-slice-row,
  .pricing-slice-row,
  .tutorial-slice-row,
  .trouble-slice-row,
  .faq-slice-item,
  .article-main-card {
    clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
  }

  /* 切片在移动端重排为单列/紧凑流 */
  .hero-slice-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 14px 16px;
  }

  .slice-left {
    flex-wrap: wrap;
    gap: 10px;
  }

  .slice-content {
    padding: 0;
  }

  /* 01 套餐流量移动端 */
  .traffic-slice-row {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    padding: 14px 16px;
  }

  .traffic-slice-scenarios {
    grid-column: span 2;
  }

  .traffic-slice-action {
    grid-column: span 2;
    text-align: left;
    margin-top: 4px;
  }

  /* 02 地区节点移动端 */
  .node-slice-row {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 14px 16px;
  }

  .node-slice-action {
    text-align: left;
    margin-top: 4px;
  }

  /* 04 & 05 AI与流媒体移动端 */
  .entity-slice-row {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 14px 16px;
  }

  .entity-slice-action {
    text-align: left;
  }

  /* 06 设备移动端 */
  .device-slice-row {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 14px 16px;
  }

  .device-slice-action {
    text-align: left;
  }

  /* 07 价格切片移动端要求 */
  .pricing-slice-row {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 16px;
  }

  .pricing-slice-action {
    text-align: left;
  }

  /* 09 教程移动端 */
  .tutorial-slice-row {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 14px 16px;
  }

  .tutorial-slice-action {
    text-align: left;
  }

  /* 10 排障移动端 */
  .trouble-slice-row {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 14px 16px;
  }

  /* FAQ 移动端 */
  .faq-slice-header {
    padding: 14px 16px;
  }

  .faq-slice-body {
    padding: 0 16px 16px 16px;
  }

  /* 文章内页卡片移动端 */
  .article-main-card {
    padding: 24px 20px;
  }

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

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

/* 针对375px/390px/430px精细优化 */
@media (max-width: 480px) {
  .hero-cta-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .cta-button {
    width: 100%;
  }

  .header-cta-group .cta-button {
    display: none; /* 移动端顶部保留简洁，通过抽屉提供 */
  }
}

/* 无障碍偏好：减少动效模式 */
@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;
  }

  .hero-slice-item:hover,
  .traffic-slice-row:hover,
  .node-slice-row:hover,
  .entity-slice-row:hover,
  .device-slice-row:hover,
  .pricing-slice-row:hover,
  .tutorial-slice-row:hover,
  .trouble-slice-row:hover,
  .cta-button:hover {
    transform: none !important;
  }
}