/* ==========================================================================
   51吃瓜网黑料网 - 整站样式表
   版本: 1.0
   说明: 覆盖全部页面通用骨架、组件与各内页专属模块
   ========================================================================== */

/* ==========================================================================
   1. Base - 基础变量、重置与全局字体
   ========================================================================== */

:root {
  --color-bg: #F5F6F7;
  --color-text: #1F2D3D;
  --color-primary: #3B7CFF;
  --color-secondary: #2FA89B;
  --color-accent: #E8A23D;
  --color-card: #FFFFFF;
  --color-border: #E5E9F0;
  --color-text-light: #5A6B7F;
  --color-text-lighter: #8494A7;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --container-width: 1200px;
  --header-height: 68px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

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

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

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
  color: #2B6AE0;
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  line-height: 1.4;
  font-weight: 600;
  color: var(--color-text);
}

h1 {
  font-size: 32px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 18px;
}

p {
  margin-bottom: 0;
}

table {
  border-collapse: collapse;
  width: 100%;
}

/* 通用图片约束 */
figure {
  margin: 0;
}

figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

figcaption {
  font-size: 14px;
  color: var(--color-text-lighter);
  line-height: 1.6;
  padding-top: 8px;
}

/* ==========================================================================
   2. Layout - 全站骨架：页头、页脚、面包屑、主容器
   ========================================================================== */

.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--color-bg);
}

.site-header {
  background-color: var(--color-card);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: 24px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.5px;
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  display: inline-block;
  padding: 8px 16px;
  font-size: 15px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  position: relative;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 2px;
  height: 2px;
  background-color: var(--color-primary);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-primary);
  background-color: rgba(59, 124, 255, 0.06);
}

.nav-link:hover::after {
  transform: scaleX(1);
}

.nav-link.is-current {
  color: var(--color-primary);
  font-weight: 600;
}

.nav-link.is-current::after {
  transform: scaleX(1);
}

.lang-switch {
  flex-shrink: 0;
}

.lang-label {
  font-size: 14px;
  color: var(--color-text-light);
  padding: 6px 14px;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  background-color: var(--color-bg);
}

/* 面包屑 */
.breadcrumb {
  font-size: 14px;
  color: var(--color-text-lighter);
  margin-bottom: 16px;
}

.breadcrumb a {
  color: var(--color-text-light);
}

.breadcrumb a:hover {
  color: var(--color-primary);
}

.breadcrumb-sep {
  margin: 0 8px;
  color: var(--color-border);
}

.breadcrumb-current {
  color: var(--color-text-light);
}

/* 面包屑 ol 形式 */
.breadcrumb ol {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.breadcrumb ol li {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* 页脚 */
.site-footer {
  margin-top: auto;
  background-color: #1F2D3D;
  color: #B8C4D0;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
}

.footer-brand-name {
  font-size: 20px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 12px;
}

.footer-tagline {
  font-size: 15px;
  color: #D0D8E0;
  margin-bottom: 12px;
  line-height: 1.6;
}

.footer-desc {
  font-size: 14px;
  color: #8FA0B0;
  line-height: 1.7;
}

.footer-col h3 {
  font-size: 16px;
  color: #FFFFFF;
  margin-bottom: 16px;
}

.footer-nav ul,
.footer-support ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav a,
.footer-support a {
  font-size: 14px;
  color: #B8C4D0;
  transition: color var(--transition-fast);
}

.footer-nav a:hover,
.footer-support a:hover {
  color: #FFFFFF;
}

.footer-support p {
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 16px;
  color: #8FA0B0;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: #7A8B9C;
  line-height: 1.6;
}

/* ==========================================================================
   3. Components - 通用组件
   ========================================================================== */

/* 按钮 */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  background-color: var(--color-primary);
  color: #FFFFFF;
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.btn-primary:hover {
  background-color: #2B6AE0;
  color: #FFFFFF;
  transform: translateY(-2px);
}

/* 语义表格 */
.table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-card);
}

.data-table,
.semantic-table {
  width: 100%;
  min-width: 600px;
  font-size: 15px;
}

.data-table th,
.data-table td,
.semantic-table th,
.semantic-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
  line-height: 1.7;
}

.data-table thead th,
.semantic-table thead th {
  background-color: #F0F3F7;
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
}

.data-table tbody tr:last-child td,
.semantic-table tbody tr:last-child td {
  border-bottom: none;
}

.data-table tbody tr:hover td,
.semantic-table tbody tr:hover td {
  background-color: #F8FAFC;
}

/* FAQ 手风琴 */
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-card);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 48px;
  transition: color var(--transition-fast);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 22px;
  font-weight: 400;
  color: var(--color-primary);
  transition: transform var(--transition-fast);
}

.faq-item[open] summary {
  color: var(--color-primary);
}

.faq-item[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
}

.faq-item p {
  padding: 0 20px 16px;
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
}

/* 检查清单 */
.checklist-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.checklist-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.check-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: var(--color-secondary);
  position: relative;
  margin-top: 4px;
}

.check-icon::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 4px;
  width: 6px;
  height: 10px;
  border: solid #FFFFFF;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.check-text {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
}

/* 步骤列表 */
.step-list,
.steps-list,
.process-steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.step-list li,
.steps-list li,
.process-step {
  padding: 20px 24px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  position: relative;
}

.step-list h3,
.steps-list h3,
.process-step h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.step-list p,
.steps-list p,
.process-step p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* 侧栏 */
.side-bar {
  min-width: 0;
}

.side-card,
.side-module,
.sidebar-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 20px;
}

.side-card h2,
.side-module h2,
.sidebar-card h2 {
  font-size: 17px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.side-list,
.side-links,
.sidebar-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.side-list a,
.side-links a,
.sidebar-links a {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.6;
  display: inline-block;
}

.side-list a:hover,
.side-links a:hover,
.sidebar-links a:hover {
  color: var(--color-primary);
}

.side-module p,
.sidebar-card p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 12px;
}

/* ==========================================================================
   4. Pages - 首页
   ========================================================================== */

.site-main {
  flex: 1;
}

/* 首屏区域 */
.hero-list {
  background-color: var(--color-card);
  border-bottom: 1px solid var(--color-border);
}

.hero-intro {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 64px 24px 40px;
  text-align: center;
}

.hero-intro h1 {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 16px;
}

.hero-slogan {
  font-size: 18px;
  color: var(--color-secondary);
  font-weight: 600;
  margin-bottom: 16px;
}

.hero-description {
  font-size: 16px;
  color: var(--color-text-light);
  max-width: 720px;
  margin: 0 auto 32px;
  line-height: 1.8;
}

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

.hero-figure img {
  border-radius: var(--radius-lg);
  width: 100%;
  height: 400px;
  object-fit: cover;
}

/* 首屏入口列表 */
.hero-entry-list {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 56px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.entry-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: box-shadow var(--transition-normal), transform var(--transition-normal);
}

.entry-card:hover {
  box-shadow: 0 4px 16px rgba(31, 45, 61, 0.08);
  transform: translateY(-2px);
}

.entry-card h2,
.entry-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.entry-card p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 12px;
}

.entry-link {
  font-size: 14px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.entry-link::after {
  content: "→";
  transition: transform var(--transition-fast);
}

.entry-link:hover::after {
  transform: translateX(4px);
}

.entry-primary {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  grid-column: 1 / -1;
}

.entry-primary h2,
.entry-primary p {
  color: #FFFFFF;
}

.entry-primary .entry-link {
  color: #FFFFFF;
  border-bottom: 1px solid rgba(255, 255, 255, 0.4);
  padding-bottom: 2px;
}

/* 首页内容图 */
.content-media {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 56px;
}

.content-media img {
  border-radius: var(--radius-lg);
  width: 100%;
  height: 320px;
  object-fit: cover;
}

/* 服务能力矩阵 */
.service-matrix {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 64px 24px;
}

.section-heading {
  margin-bottom: 32px;
}

.section-heading h2 {
  font-size: 26px;
  margin-bottom: 8px;
}

.section-heading p {
  font-size: 15px;
  color: var(--color-text-light);
  max-width: 640px;
}

.matrix-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.service-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.service-card:hover {
  box-shadow: 0 4px 16px rgba(31, 45, 61, 0.08);
  border-color: var(--color-primary);
}

.service-card h3 {
  font-size: 18px;
  margin-bottom: 10px;
  position: relative;
  padding-left: 16px;
}

.service-card h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 4px;
  height: 20px;
  border-radius: 2px;
  background-color: var(--color-primary);
}

.service-card:nth-child(2n) h3::before {
  background-color: var(--color-secondary);
}

.service-card:nth-child(3n) h3::before {
  background-color: var(--color-accent);
}

.service-card p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 16px;
}

.card-link {
  font-size: 14px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.card-link::after {
  content: "→";
  transition: transform var(--transition-fast);
}

.card-link:hover::after {
  transform: translateX(4px);
}

/* 合作流程时间线 */
.process-timeline {
  background-color: var(--color-card);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.process-timeline .section-heading {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 64px 24px 0;
}

.timeline-list {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.timeline-item {
  position: relative;
  padding: 0 0 32px 40px;
  border-left: 2px solid var(--color-border);
}

.timeline-item:last-child {
  border-left-color: transparent;
  padding-bottom: 8px;
}

.timeline-node {
  position: absolute;
  left: -9px;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background-color: var(--color-primary);
  border: 3px solid var(--color-card);
  box-shadow: 0 0 0 2px var(--color-primary);
}

.timeline-item:nth-child(2n) .timeline-node {
  background-color: var(--color-secondary);
  box-shadow: 0 0 0 2px var(--color-secondary);
}

.timeline-item:nth-child(3n) .timeline-node {
  background-color: var(--color-accent);
  box-shadow: 0 0 0 2px var(--color-accent);
}

.timeline-item h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.timeline-item p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
}

.timeline-link {
  max-width: var(--container-width);
  margin: 0 auto;
  display: block;
  padding: 0 24px 64px;
  font-size: 15px;
  font-weight: 600;
}

/* 支持导航 */
.support-navigation {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 64px 24px;
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.support-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  display: block;
  transition: box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.support-card:hover {
  box-shadow: 0 4px 16px rgba(31, 45, 61, 0.08);
  border-color: var(--color-secondary);
}

.support-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
  color: var(--color-text);
}

.support-card p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 12px;
}

.support-reason {
  display: block;
  font-size: 13px;
  color: var(--color-secondary);
  font-weight: 600;
}

/* FAQ 预览 */
.faq-preview {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 64px;
}

.faq-preview .section-heading {
  margin-bottom: 24px;
}

.faq-more-link {
  display: inline-block;
  margin-top: 16px;
  font-size: 15px;
  font-weight: 600;
}

/* 相关链接 */
.related-links {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 64px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.related-links-label {
  font-size: 14px;
  color: var(--color-text-lighter);
  margin-right: 8px;
}

.related-links-item {
  font-size: 14px;
  padding: 6px 16px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  color: var(--color-text-light);
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.related-links-item:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ==========================================================================
   5. Pages - 内页通用
   ========================================================================== */

.site-main.inner-main {
  background-color: var(--color-bg);
}

/* 页面标题区 */
.page-title-area {
  background-color: var(--color-card);
  border-bottom: 1px solid var(--color-border);
}

.page-title-area .page-intro,
.page-title-area p {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px 24px 0;
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
}

.page-title-area .page-subtitle {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px 24px 0;
  font-size: 15px;
  color: var(--color-text-light);
}

/* 布局外壳 */
.layout-shell,
.page-layout {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 64px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 32px;
  align-items: start;
}

.main-content {
  min-width: 0;
}

/* 页面标题 */
.page-header {
  margin-bottom: 28px;
}

.page-title {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 8px;
}

.page-header p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* 内页内容区块 */
.inner-main section {
  margin-bottom: 40px;
}

.inner-main section h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.inner-main section .section-desc,
.inner-main section > p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 20px;
}

/* ==========================================================================
   6. Pages - start.html 开始使用
   ========================================================================== */

/* 时间线 */
.start-timeline {
  position: relative;
}

.start-timeline .timeline-item {
  position: relative;
  padding: 0 0 32px 56px;
}

.timeline-marker {
  position: absolute;
  left: 0;
  top: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}

.timeline-step {
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 700;
}

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

.timeline-body h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.timeline-body > p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 12px;
}

.node-detail-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.node-detail-list li {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
  padding-left: 16px;
  position: relative;
}

.node-detail-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-secondary);
}

/* 内容图 */
.content-figure {
  margin-bottom: 40px;
}

.content-figure img {
  border-radius: var(--radius-lg);
  width: 100%;
  height: 280px;
  object-fit: cover;
}

/* 后续步骤 */
.next-steps-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.next-step-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.next-step-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.next-step-card p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 12px;
}

.text-link {
  font-size: 14px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.text-link::after {
  content: "→";
  transition: transform var(--transition-fast);
}

.text-link:hover::after {
  transform: translateX(4px);
}

/* ==========================================================================
   7. Pages - account.html 账户设置
   ========================================================================== */

.account-overview {
  margin-bottom: 40px;
}

.account-overview h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.account-overview p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 20px;
}

/* 权限配置 */
.permission-steps {
  counter-reset: step-counter;
}

.permission-steps li {
  counter-increment: step-counter;
  padding-left: 64px;
  position: relative;
}

.permission-steps li::before {
  content: counter(step-counter);
  position: absolute;
  left: 20px;
  top: 20px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--color-secondary);
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.flow-note {
  font-size: 14px;
  color: var(--color-text-lighter);
  line-height: 1.7;
  margin-top: 16px;
  padding: 12px 16px;
  background-color: #F0F8F7;
  border-left: 3px solid var(--color-secondary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* 更新指引 */
.guidance-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.guidance-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.guidance-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.guidance-item p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ==========================================================================
   8. Pages - features.html 功能说明
   ========================================================================== */

.feature-parameter-table {
  margin-bottom: 40px;
}

.feature-parameter-table h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.feature-parameter-table p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 20px;
}

.function-image-block {
  margin-bottom: 40px;
}

.function-figure img {
  border-radius: var(--radius-lg);
  width: 100%;
  height: 300px;
  object-fit: cover;
}

/* 场景推荐 */
.recommendation-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.recommendation-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.recommendation-card:hover {
  box-shadow: 0 4px 16px rgba(31, 45, 61, 0.08);
  border-color: var(--color-accent);
}

.recommendation-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.recommendation-card p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 8px;
}

/* 支持入口 */
.support-entry {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
}

.support-entry h2 {
  font-size: 20px;
  margin-bottom: 8px;
}

.support-entry > p {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.support-entry ul {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.support-entry ul li a {
  display: block;
  padding: 20px 24px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.support-entry ul li a:hover {
  border-color: var(--color-primary);
  box-shadow: 0 4px 16px rgba(31, 45, 61, 0.08);
  color: var(--color-primary);
}

/* ==========================================================================
   9. Pages - troubleshooting.html 故障处理
   ========================================================================== */

.trouble-causes-section {
  margin-bottom: 40px;
}

.trouble-causes-section h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.trouble-causes-section p {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.troubleshooting-steps-section {
  margin-bottom: 40px;
}

.troubleshooting-steps-section h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.troubleshooting-steps-section > p {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.steps-list li {
  padding-left: 56px;
  position: relative;
}

.steps-list li::before {
  content: "";
  position: absolute;
  left: 24px;
  top: 24px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

.faq-section {
  margin-bottom: 0;
}

.faq-section h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.faq-section > p {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

/* ==========================================================================
   10. Pages - contact.html 联系支持
   ========================================================================== */

.contact-preparation {
  margin-bottom: 40px;
}

.contact-preparation h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.contact-preparation > p {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.contact-checklist {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact-checklist .checklist-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.contact-checklist .checklist-item h3 {
  font-size: 16px;
  margin-bottom: 0;
}

.contact-checklist .checklist-item p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
}

.support-process {
  margin-bottom: 40px;
}

.support-process h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.support-process > p {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.process-figure {
  margin-top: 24px;
}

.process-figure img {
  border-radius: var(--radius-lg);
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.response-time {
  margin-bottom: 40px;
}

.response-time h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.response-time > p {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.response-table-wrap {
  margin-bottom: 16px;
}

.contact-note {
  background-color: #F0F8F7;
  border: 1px solid #D4E8E5;
  border-radius: var(--radius-md);
  padding: 24px;
}

.contact-note h2 {
  font-size: 18px;
  margin-bottom: 12px;
  color: var(--color-secondary);
}

.contact-note p {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 8px;
}

.contact-note p:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   11. Pages - 404.html
   ========================================================================== */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  flex: 1;
}

.error-content {
  text-align: center;
  max-width: 520px;
}

.error-content h1 {
  font-size: 72px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
  line-height: 1;
}

.error-desc {
  font-size: 18px;
  color: var(--color-text-light);
  margin-bottom: 32px;
  line-height: 1.7;
}

.error-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  background-color: var(--color-primary);
  color: #FFFFFF;
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.error-btn:hover {
  background-color: #2B6AE0;
  color: #FFFFFF;
  transform: translateY(-2px);
}

/* ==========================================================================
   12. Responsive - 响应式断点
   ========================================================================== */

/* 桌面端 1024px 及以上 */
@media (min-width: 1024px) {
  .main-nav {
    display: block;
  }
}

/* 平板与桌面之间 768px - 1023px */
@media (max-width: 1023px) {
  .layout-shell,
  .page-layout {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 24px;
  }

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

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

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

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

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

  .footer-brand {
    grid-column: 1 / -1;
  }

  .hero-figure img {
    height: 320px;
  }

  .content-media img {
    height: 260px;
  }
}

/* 手机端 767px 及以下 */
@media (max-width: 767px) {
  .header-inner {
    padding: 0 16px;
    height: 60px;
  }

  .brand-name {
    font-size: 17px;
  }

  .main-nav {
    display: none;
  }

  .lang-label {
    font-size: 13px;
    padding: 4px 12px;
  }

  .hero-intro {
    padding: 40px 16px 28px;
  }

  .hero-intro h1 {
    font-size: 26px;
  }

  .hero-slogan {
    font-size: 16px;
  }

  .hero-description {
    font-size: 15px;
  }

  .hero-figure {
    padding: 0 16px;
  }

  .hero-figure img {
    height: 220px;
  }

  .hero-entry-list {
    padding: 32px 16px 40px;
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .entry-primary {
    grid-column: 1;
  }

  .content-media {
    padding: 0 16px 40px;
  }

  .content-media img {
    height: 200px;
  }

  .service-matrix {
    padding: 48px 16px;
  }

  .section-heading h2 {
    font-size: 22px;
  }

  .matrix-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .process-timeline .section-heading {
    padding: 48px 16px 0;
  }

  .timeline-list {
    padding: 24px 16px 16px;
  }

  .timeline-link {
    padding: 0 16px 48px;
  }

  .support-navigation {
    padding: 48px 16px;
  }

  .support-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .faq-preview {
    padding: 0 16px 48px;
  }

  .related-links {
    padding: 0 16px 48px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 16px 24px;
  }

  .footer-brand {
    grid-column: 1;
  }

  .footer-bottom {
    padding: 16px;
  }

  .page-title-area .page-intro,
  .page-title-area p,
  .page-title-area .page-subtitle {
    padding: 16px 16px 0;
    font-size: 14px;
  }

  .layout-shell,
  .page-layout {
    padding: 24px 16px 48px;
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .page-title {
    font-size: 24px;
  }

  .page-header {
    margin-bottom: 24px;
  }

  .breadcrumb {
    font-size: 13px;
    margin-bottom: 12px;
  }

  .inner-main section h2 {
    font-size: 20px;
  }

  /* start.html */
  .start-timeline .timeline-item {
    padding: 0 0 28px 44px;
  }

  .timeline-marker {
    width: 32px;
    height: 32px;
  }

  .timeline-body {
    padding: 16px;
  }

  .content-figure img {
    height: 200px;
  }

  .next-steps-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .checklist-item {
    padding: 12px;
  }

  /* account.html */
  .account-overview p {
    font-size: 14px;
  }

  .permission-steps li {
    padding-left: 48px;
  }

  .permission-steps li::before {
    left: 12px;
    top: 18px;
    width: 24px;
    height: 24px;
    font-size: 13px;
  }

  .guidance-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  /* features.html */
  .recommendation-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .function-figure img {
    height: 200px;
  }

  .support-entry {
    padding: 0 16px 40px;
  }

  .support-entry ul {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  /* troubleshooting.html */
  .steps-list li {
    padding-left: 40px;
  }

  .steps-list li::before {
    left: 16px;
    top: 22px;
  }

  /* contact.html */
  .contact-checklist .checklist-item {
    padding: 12px;
  }

  .process-figure img {
    height: 200px;
  }

  .contact-note {
    padding: 16px;
  }

  .error-main {
    padding: 60px 16px;
  }

  .error-content h1 {
    font-size: 48px;
  }

  .error-desc {
    font-size: 16px;
  }
}

/* 小手机 480px 及以下 */
@media (max-width: 480px) {
  .brand-name {
    font-size: 15px;
  }

  .nav-link {
    padding: 8px 10px;
    font-size: 14px;
  }

  .hero-intro h1 {
    font-size: 24px;
  }

  .hero-figure img {
    height: 180px;
  }

  .btn-primary {
    padding: 12px 24px;
    font-size: 15px;
  }

  .entry-card {
    padding: 16px;
  }

  .service-card {
    padding: 20px;
  }

  .timeline-item {
    padding-left: 32px;
  }

  .timeline-node {
    left: -8px;
    width: 14px;
    height: 14px;
  }

  .support-card {
    padding: 16px;
  }

  .faq-item summary {
    padding: 14px 40px 14px 16px;
    font-size: 15px;
  }

  .faq-item p {
    padding: 0 16px 14px;
    font-size: 14px;
  }

  .side-card,
  .side-module,
  .sidebar-card {
    padding: 16px;
  }

  .data-table th,
  .data-table td,
  .semantic-table th,
  .semantic-table td {
    padding: 10px 12px;
    font-size: 14px;
  }

  .recommendation-card {
    padding: 16px;
  }

  .next-step-card {
    padding: 16px;
  }

  .timeline-body {
    padding: 14px 16px;
  }

  .page-title-area .page-intro,
  .page-title-area p,
  .page-title-area .page-subtitle {
    padding: 12px 12px 0;
  }

  .layout-shell,
  .page-layout {
    padding: 20px 12px 40px;
  }

  .footer-inner {
    padding: 32px 12px 20px;
  }
}

/* ==========================================================================
   13. 打印样式
   ========================================================================== */

@media print {
  .site-header,
  .breadcrumb,
  .side-bar,
  .site-footer,
  .support-entry,
  .related-links,
  .faq-more-link,
  .timeline-link,
  .btn-primary,
  .error-btn {
    display: none !important;
  }

  body {
    background-color: #FFFFFF;
    font-size: 12pt;
    line-height: 1.6;
  }

  .site-main {
    padding: 0;
  }

  .layout-shell,
  .page-layout {
    display: block;
    max-width: 100%;
    padding: 0;
  }

  .main-content {
    width: 100%;
  }

  .page-title {
    font-size: 20pt;
  }

  .inner-main section {
    margin-bottom: 24px;
    break-inside: avoid;
  }

  .data-table,
  .semantic-table {
    min-width: 0;
    font-size: 10pt;
  }

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

  .timeline-item,
  .start-timeline .timeline-item {
    padding: 0 0 16px 24px;
    border-left: 1px solid #CCCCCC;
  }

  .timeline-marker {
    width: 20px;
    height: 20px;
    font-size: 10px;
  }

  .timeline-node {
    width: 10px;
    height: 10px;
    left: -6px;
  }

  .timeline-body,
  .next-step-card,
  .service-card,
  .entry-card,
  .recommendation-card,
  .guidance-item,
  .checklist-item,
  .contact-checklist .checklist-item {
    border: 1px solid #DDDDDD;
    break-inside: avoid;
  }

  figure img {
    max-height: 200px;
    object-fit: cover;
  }
}