/* ==========================================================================
   吃瓜网址 · 全站样式表
   报纸编辑风：黑白灰主色 + 红色点缀，衬线标题 + 无衬线正文
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Base —— 基础变量、重置、全局元素
   -------------------------------------------------------------------------- */
:root {
  --color-ink: #1a1a1a;
  --color-paper: #f5f2ea;
  --color-red: #c3272b;
  --color-gray: #2b2b2b;
  --color-line: #e8e4d8;
  --color-white: #ffffff;
  --font-serif: Georgia, "Times New Roman", "Songti SC", "SimSun", serif;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --container-width: 1200px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --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%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-ink);
  background-color: var(--color-paper);
  -webkit-font-smoothing: antialiased;
}

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

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-serif);
  line-height: 1.4;
  color: var(--color-ink);
}

h1 {
  font-size: 30px;
  font-weight: 700;
}

h2 {
  font-size: 22px;
  font-weight: 700;
}

h3 {
  font-size: 18px;
  font-weight: 600;
}

p {
  margin-bottom: 12px;
}

figure {
  margin: 0;
}

figcaption {
  font-size: 13px;
  color: var(--color-gray);
  line-height: 1.5;
  margin-top: 8px;
  border-left: 2px solid var(--color-red);
  padding-left: 10px;
}

/* --------------------------------------------------------------------------
   2. Layout —— 全站统一骨架：页头、页脚、容器、面包屑、页面标题区
   -------------------------------------------------------------------------- */

/* 全站容器宽度 */
.site-header .header-inner,
.site-main,
.site-footer .footer-inner,
.breadcrumb .breadcrumb-inner,
.layout-shell,
.page-layout {
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  width: 100%;
}

/* 页头 */
.site-header {
  background-color: var(--color-white);
  border-bottom: 3px solid var(--color-ink);
  position: relative;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding-top: 16px;
  padding-bottom: 16px;
  gap: 12px 24px;
}

.site-brand {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.site-brand a {
  color: var(--color-ink);
}

.site-brand a:hover {
  color: var(--color-red);
}

.site-slogan {
  font-size: 13px;
  color: var(--color-gray);
  border-left: 2px solid var(--color-red);
  padding-left: 10px;
  line-height: 1.4;
  display: none;
}

/* 主导航 */
.main-nav {
  order: 3;
  width: 100%;
  border-top: 1px solid var(--color-line);
  margin-top: 8px;
  padding-top: 12px;
}

.main-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 28px;
}

.main-nav a {
  display: block;
  padding: 6px 2px;
  font-size: 15px;
  color: var(--color-gray);
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.main-nav a:hover {
  color: var(--color-red);
  border-bottom-color: var(--color-red);
}

.main-nav a.is-current {
  color: var(--color-ink);
  border-bottom-color: var(--color-red);
  font-weight: 600;
}

/* 移动端导航按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  gap: 5px;
  background: none;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 8px;
}

.toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-ink);
  transition: background-color var(--transition-fast);
}

.nav-toggle:hover .toggle-bar {
  background-color: var(--color-red);
}

/* 面包屑 */
.breadcrumb {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-line);
}

.breadcrumb ol {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  padding-top: 10px;
  padding-bottom: 10px;
}

.breadcrumb li {
  font-size: 13px;
  color: var(--color-gray);
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--color-line);
}

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

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

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

.breadcrumb-sep {
  margin-left: 6px;
  margin-right: 6px;
  color: var(--color-line);
}

/* 页面标题区 */
.page-title-area {
  background-color: var(--color-white);
  border-bottom: 2px solid var(--color-ink);
  padding-top: 20px;
  padding-bottom: 20px;
}

.page-title-area p {
  font-size: 15px;
  color: var(--color-gray);
  margin-bottom: 0;
  max-width: 760px;
}

.page-header {
  padding-top: 24px;
  padding-bottom: 16px;
}

.page-title {
  font-size: 30px;
  line-height: 1.3;
  border-bottom: 3px solid var(--color-red);
  padding-bottom: 10px;
  display: inline-block;
}

.page-lead {
  font-size: 15px;
  color: var(--color-gray);
  max-width: 760px;
}

/* 页脚 */
.site-footer {
  background-color: var(--color-ink);
  color: #d8d4c8;
  margin-top: 60px;
}

.footer-inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  padding-top: 40px;
  padding-bottom: 32px;
}

.footer-column h2 {
  font-size: 17px;
  color: var(--color-white);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid #3a3a3a;
  position: relative;
}

.footer-column h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 28px;
  height: 2px;
  background-color: var(--color-red);
}

.footer-column ul li {
  margin-bottom: 8px;
}

.footer-column a {
  color: #b8b4a8;
  font-size: 14px;
}

.footer-column a:hover {
  color: var(--color-white);
}

.copyright {
  border-top: 1px solid #3a3a3a;
  padding-top: 16px;
  padding-bottom: 16px;
  font-size: 13px;
  color: #8a8678;
  text-align: center;
}

/* --------------------------------------------------------------------------
   3. Components —— 通用组件：按钮、卡片、FAQ、步骤、资讯、表单
   -------------------------------------------------------------------------- */

/* 按钮 */
.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 22px;
  font-size: 15px;
  font-family: var(--font-sans);
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: center;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.btn-primary {
  background-color: var(--color-red);
  color: var(--color-white);
  border: 1px solid var(--color-red);
}

.btn-primary:hover {
  background-color: #a01f22;
  border-color: #a01f22;
  color: var(--color-white);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-ink);
  border: 1px solid var(--color-ink);
}

.btn-secondary:hover {
  border-color: var(--color-red);
  color: var(--color-red);
}

/* 服务卡片 */
.service-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.service-card:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
  border-color: var(--color-red);
}

.service-card h3 {
  font-size: 18px;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line);
}

.service-card p {
  font-size: 14px;
  color: var(--color-gray);
  margin-bottom: 14px;
  line-height: 1.65;
}

.service-card a {
  font-size: 14px;
  color: var(--color-red);
  font-weight: 500;
}

.service-card a:hover {
  text-decoration: underline;
}

/* 步骤条（首页横排） */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.step-item {
  position: relative;
  padding-top: 44px;
}

.step-number {
  position: absolute;
  top: 0;
  left: 0;
  font-family: var(--font-serif);
  font-size: 36px;
  font-weight: 700;
  color: var(--color-red);
  line-height: 1;
}

.step-item h3 {
  font-size: 18px;
  margin-bottom: 6px;
}

.step-item p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
  margin-bottom: 0;
}

/* FAQ 折叠 */
.faq-item {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  margin-bottom: 10px;
}

.faq-item summary {
  padding: 14px 18px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 40px;
  font-family: var(--font-serif);
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 18px;
  color: var(--color-red);
  transition: transform var(--transition-fast);
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item[open] summary {
  border-bottom: 1px solid var(--color-line);
}

.faq-answer {
  padding: 14px 18px;
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.7;
}

.faq-answer p {
  margin-bottom: 8px;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

/* 资讯条目 */
.news-item {
  padding: 14px 0;
  border-bottom: 1px solid var(--color-line);
}

.news-item:last-child {
  border-bottom: none;
}

.news-date {
  font-size: 12px;
  color: var(--color-gray);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}

.news-item h3 {
  font-size: 17px;
  margin-bottom: 6px;
  font-family: var(--font-serif);
}

.news-item h3 a {
  color: var(--color-ink);
}

.news-item h3 a:hover {
  color: var(--color-red);
}

.news-summary {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.65;
  margin-bottom: 0;
}

/* 步骤条（竖排，侧栏用） */
.step-list-vertical {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.step-list-vertical .step-item {
  display: flex;
  gap: 14px;
  padding-top: 0;
}

.step-num {
  flex: 0 0 32px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-red);
  border: 1px solid var(--color-red);
  border-radius: 50%;
  background-color: var(--color-white);
}

.step-text h3 {
  font-size: 16px;
  margin-bottom: 4px;
}

.step-text p {
  font-size: 13px;
  color: var(--color-gray);
  margin-bottom: 0;
  line-height: 1.5;
}

/* 相关内容导航 */
.related-links {
  max-width: var(--container-width);
  margin: 32px auto 0;
  padding: 16px 24px;
  border-top: 1px solid var(--color-line);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 16px;
  font-size: 14px;
}

.related-links-label {
  font-weight: 600;
  color: var(--color-ink);
  margin-right: 4px;
}

.related-links-item {
  color: var(--color-gray);
  padding: 4px 8px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  font-size: 13px;
}

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

/* 图片容器统一约束 */
.hero-figure,
.content-media,
.intro-figure,
.service-media,
.service-figure,
.content-figure,
.news-figure,
.guide-figure,
.contact-figure {
  overflow: hidden;
  border-radius: var(--radius-md);
  background-color: var(--color-line);
}

.hero-figure img,
.content-media img,
.intro-figure img,
.service-media img,
.service-figure img,
.content-figure img,
.news-figure img,
.guide-figure img,
.contact-figure img {
  width: 100%;
  object-fit: cover;
}

/* --------------------------------------------------------------------------
   4. Pages —— 首页
   -------------------------------------------------------------------------- */

/* 首屏主视觉 */
.hero-section {
  background-color: var(--color-white);
  border-bottom: 3px solid var(--color-ink);
}

.hero-layout {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
  align-items: start;
}

.hero-main h1 {
  font-size: 30px;
  line-height: 1.3;
  margin-bottom: 14px;
}

.hero-lead {
  font-size: 15px;
  color: var(--color-gray);
  max-width: 560px;
  margin-bottom: 20px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.hero-figure {
  max-width: 560px;
}

.hero-figure img {
  aspect-ratio: 16 / 8;
}

/* 首屏侧栏 */
.hero-side {
  border-left: 3px solid var(--color-red);
  padding-left: 20px;
}

.today-preview {
  margin-bottom: 30px;
}

.today-preview h2,
.trend-card h2 {
  font-size: 18px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line);
  margin-bottom: 12px;
  position: relative;
}

.today-preview h2::after,
.trend-card h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 32px;
  height: 2px;
  background-color: var(--color-red);
}

.trend-card {
  background-color: var(--color-paper);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 18px;
}

.trend-card p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.65;
  margin-bottom: 10px;
}

.trend-card a {
  font-size: 14px;
  color: var(--color-red);
  font-weight: 500;
}

/* 首页中部大图 */
.content-media-primary {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.content-media-primary img {
  aspect-ratio: 21 / 6;
  width: 100%;
}

/* 服务能力总览 */
.services-overview {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 24px;
}

.section-header {
  margin-bottom: 28px;
  border-bottom: 1px solid var(--color-line);
  padding-bottom: 14px;
}

.section-header h2 {
  font-size: 22px;
  margin-bottom: 6px;
  position: relative;
  display: inline-block;
}

.section-header p {
  font-size: 14px;
  color: var(--color-gray);
  margin-bottom: 0;
}

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

/* 合作流程 */
.process-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px 24px;
  border-top: 1px solid var(--color-line);
}

/* 帮助与反馈 */
.help-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px 48px;
  border-top: 1px solid var(--color-line);
}

.help-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.help-faq h2,
.help-feedback h2 {
  font-size: 20px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line);
}

.help-feedback p {
  font-size: 14px;
  color: var(--color-gray);
  margin-bottom: 16px;
  line-height: 1.7;
}

.help-feedback .btn-primary,
.help-feedback .btn-secondary {
  margin-right: 10px;
  margin-bottom: 10px;
}

/* --------------------------------------------------------------------------
   5. Pages —— 内页通用布局
   -------------------------------------------------------------------------- */

.inner-main {
  padding-top: 0;
  padding-bottom: 40px;
}

/* 内页双栏布局 */
.layout-shell {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
  padding-top: 28px;
  padding-bottom: 40px;
}

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

.side-panel {
  min-width: 0;
}

.side-widget {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 24px;
}

.side-widget h2 {
  font-size: 18px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line);
  position: relative;
}

.side-widget h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 28px;
  height: 2px;
  background-color: var(--color-red);
}

.side-note {
  font-size: 13px;
  color: var(--color-gray);
  line-height: 1.6;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--color-line);
}

/* 侧栏在左的布局 */
.page-layout.sidebar-left {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 40px;
  padding-top: 28px;
  padding-bottom: 40px;
}

.sidebar {
  min-width: 0;
}

.sidebar-block {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 20px;
}

.sidebar-block h2 {
  font-size: 16px;
  margin-bottom: 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--color-line);
}

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

.category-list a {
  display: block;
  padding: 6px 10px;
  font-size: 14px;
  color: var(--color-gray);
  border-left: 2px solid transparent;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.category-list a:hover {
  border-left-color: var(--color-red);
  color: var(--color-red);
}

/* 今日吃瓜右侧栏 */
.layout-shell.sidebar-right {
  grid-template-columns: 1fr 300px;
}

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

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

/* --------------------------------------------------------------------------
   6. Pages —— 关于我们
   -------------------------------------------------------------------------- */

.brand-intro {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  padding-top: 36px;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--color-line);
  align-items: start;
}

.intro-text h2 {
  font-size: 20px;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line);
}

.intro-text p {
  font-size: 15px;
  line-height: 1.7;
}

.intro-text h3 {
  font-size: 17px;
  margin-top: 20px;
  margin-bottom: 10px;
}

.point-list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 8px;
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
}

.point-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  background-color: var(--color-red);
  border-radius: 50%;
}

.intro-figure img {
  aspect-ratio: 4 / 3;
}

/* 服务原则 */
.service-principles {
  padding-top: 36px;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--color-line);
}

.service-principles > h2 {
  font-size: 20px;
  margin-bottom: 20px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line);
}

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

.principle-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-red);
  border-radius: var(--radius-md);
  padding: 20px;
}

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

.principle-card p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.65;
  margin-bottom: 0;
}

/* 更新日志 */
.changelog {
  padding-top: 36px;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--color-line);
}

.changelog > h2 {
  font-size: 20px;
  margin-bottom: 4px;
}

.section-note {
  font-size: 14px;
  color: var(--color-gray);
  margin-bottom: 24px;
}

.log-group {
  margin-bottom: 28px;
}

.log-group h3 {
  font-size: 17px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.log-group h3::before {
  content: "";
  width: 10px;
  height: 10px;
  background-color: var(--color-red);
  display: inline-block;
  flex-shrink: 0;
}

.log-list li {
  display: flex;
  gap: 14px;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-line);
  font-size: 14px;
}

.log-list time {
  flex: 0 0 80px;
  font-size: 13px;
  color: var(--color-gray);
  font-family: var(--font-serif);
}

.log-list p {
  margin-bottom: 0;
  color: var(--color-gray);
  line-height: 1.6;
}

/* 关于页底部链接 */
.about-links {
  padding-top: 32px;
}

.about-links h2 {
  font-size: 18px;
  margin-bottom: 8px;
}

.about-links p {
  font-size: 14px;
  color: var(--color-gray);
  margin-bottom: 16px;
}

.link-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.link-group a {
  display: inline-block;
  padding: 8px 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  font-size: 14px;
  background-color: var(--color-white);
}

.link-group a:hover {
  border-color: var(--color-red);
  color: var(--color-red);
}

/* --------------------------------------------------------------------------
   7. Pages —— 服务总览
   -------------------------------------------------------------------------- */

.service-list {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.service-entry {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.service-entry-head {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 24px;
  border-bottom: 1px solid var(--color-line);
  background-color: var(--color-paper);
}

.service-index {
  flex: 0 0 36px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-red);
  color: var(--color-white);
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  border-radius: 50%;
}

.service-entry-title h3 {
  font-size: 19px;
  margin-bottom: 2px;
}

.service-entry-title p {
  font-size: 13px;
  color: var(--color-gray);
  margin-bottom: 0;
}

.service-entry-body {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 24px;
  padding: 24px;
}

.service-media img {
  aspect-ratio: 4 / 3;
}

.service-detail h3 {
  font-size: 16px;
  margin-bottom: 6px;
  margin-top: 14px;
  color: var(--color-red);
}

.service-detail h3:first-child {
  margin-top: 0;
}

.service-detail p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.7;
  margin-bottom: 10px;
}

.service-detail ul {
  padding-left: 18px;
  list-style: disc;
  margin-bottom: 10px;
}

.service-detail ul li {
  font-size: 14px;
  color: var(--color-gray);
  margin-bottom: 4px;
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   8. Pages —— 网址总目录
   -------------------------------------------------------------------------- */

.directory-section {
  padding-top: 12px;
}

.directory-section > h2 {
  font-size: 20px;
  margin-bottom: 20px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line);
}

.category-group {
  margin-bottom: 28px;
}

.category-group h3 {
  font-size: 17px;
  margin-bottom: 12px;
  padding-left: 12px;
  border-left: 3px solid var(--color-red);
}

.site-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.site-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 14px;
}

.site-item strong {
  display: block;
  font-size: 15px;
  margin-bottom: 2px;
  font-family: var(--font-serif);
}

.site-item span {
  color: var(--color-gray);
  font-size: 13px;
  line-height: 1.5;
  display: block;
}

/* 收录说明 */
.submission-section {
  padding-top: 32px;
  border-top: 1px solid var(--color-line);
}

.submission-section > h2 {
  font-size: 20px;
  margin-bottom: 20px;
}

.submission-content {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 32px;
  align-items: start;
}

.content-figure img {
  aspect-ratio: 4 / 3;
}

.submission-text h3 {
  font-size: 16px;
  margin-bottom: 8px;
  margin-top: 16px;
}

.submission-text h3:first-child {
  margin-top: 0;
}

.submission-text p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.7;
}

.submission-text ul {
  padding-left: 18px;
  list-style: disc;
  margin-bottom: 10px;
}

.submission-text ul li {
  font-size: 14px;
  color: var(--color-gray);
  margin-bottom: 4px;
  line-height: 1.6;
}

.text-link {
  display: inline-block;
  margin-top: 8px;
  color: var(--color-red);
  font-weight: 500;
  font-size: 14px;
}

.text-link:hover {
  text-decoration: underline;
}

/* --------------------------------------------------------------------------
   9. Pages —— 今日吃瓜
   -------------------------------------------------------------------------- */

.today-news-list {
  padding-top: 8px;
}

.today-news-list > h2 {
  font-size: 20px;
  margin-bottom: 4px;
}

.section-intro {
  font-size: 14px;
  color: var(--color-gray);
  margin-bottom: 20px;
}

.today-news-list .news-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--color-line);
}

.today-news-list .news-item:last-child {
  border-bottom: none;
}

.today-news-list .news-item h3 {
  font-size: 18px;
  margin-bottom: 6px;
}

/* 标签 */
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag-list a {
  display: inline-block;
  padding: 6px 14px;
  font-size: 13px;
  border: 1px solid var(--color-line);
  border-radius: 999px;
  background-color: var(--color-white);
  color: var(--color-gray);
  transition: border-color var(--transition-fast), color var(--transition-fast), background-color var(--transition-fast);
}

.tag-list a:hover {
  border-color: var(--color-red);
  color: var(--color-red);
  background-color: var(--color-paper);
}

/* 栏目说明 */
.news-column-note {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 20px;
}

.news-column-note h2 {
  font-size: 17px;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line);
}

.news-figure img {
  aspect-ratio: 16 / 9;
}

.news-column-note p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.7;
  margin-top: 12px;
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   10. Pages —— 帮助中心
   -------------------------------------------------------------------------- */

.faq-section {
  padding-top: 28px;
}

.faq-intro {
  margin-bottom: 28px;
  border-bottom: 1px solid var(--color-line);
  padding-bottom: 16px;
}

.faq-intro h2 {
  font-size: 20px;
  margin-bottom: 6px;
}

.faq-intro p {
  font-size: 14px;
  color: var(--color-gray);
  margin-bottom: 0;
}

.faq-group {
  margin-bottom: 28px;
}

.faq-group h3 {
  font-size: 17px;
  margin-bottom: 12px;
  padding-left: 12px;
  border-left: 3px solid var(--color-red);
}

/* 引导配图 */
.guide-media {
  margin: 32px 0;
}

.guide-figure img {
  aspect-ratio: 21 / 7;
  width: 100%;
}

/* 反馈入口 */
.feedback-entry {
  border-top: 1px solid var(--color-line);
  padding-top: 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.feedback-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.feedback-card h2,
.feedback-note h2 {
  font-size: 18px;
  margin-bottom: 10px;
}

.feedback-card p,
.feedback-note p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.7;
}

.feedback-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}

.feedback-note {
  background-color: var(--color-paper);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 28px;
}

/* --------------------------------------------------------------------------
   11. Pages —— 合作与反馈
   -------------------------------------------------------------------------- */

.contact-section {
  padding-top: 28px;
}

.section-heading {
  margin-bottom: 24px;
  border-bottom: 1px solid var(--color-line);
  padding-bottom: 12px;
}

.section-heading h2 {
  font-size: 20px;
  margin-bottom: 4px;
}

.section-heading p {
  font-size: 14px;
  color: var(--color-gray);
  margin-bottom: 0;
}

.contact-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 28px;
}

.contact-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.contact-card-text h3 {
  font-size: 18px;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line);
}

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

.contact-card-link {
  margin-top: 16px;
}

.contact-card-link a {
  display: inline-block;
  padding: 8px 18px;
  border: 1px solid var(--color-red);
  border-radius: var(--radius-sm);
  color: var(--color-red);
  font-size: 14px;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.contact-card-link a:hover {
  background-color: var(--color-red);
  color: var(--color-white);
}

.contact-figure img {
  aspect-ratio: 21 / 8;
  width: 100%;
}

/* 合作流程（联系页） */
.process-steps .process-step {
  position: relative;
  padding-top: 44px;
}

.process-step .step-number {
  position: absolute;
  top: 0;
  left: 0;
  font-family: var(--font-serif);
  font-size: 36px;
  font-weight: 700;
  color: var(--color-red);
  line-height: 1;
}

.process-step h3 {
  font-size: 18px;
  margin-bottom: 6px;
}

.process-step p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
  margin-bottom: 0;
}

/* 注意事项 */
.notice-section {
  padding-top: 32px;
}

.notice-list li {
  position: relative;
  padding-left: 22px;
  padding-top: 8px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line);
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.6;
}

.notice-list li::before {
  content: "!";
  position: absolute;
  left: 0;
  top: 8px;
  width: 18px;
  height: 18px;
  background-color: var(--color-red);
  color: var(--color-white);
  border-radius: 50%;
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 入口区 */
.entry-section {
  padding-top: 32px;
}

.entry-box {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 28px;
  text-align: center;
}

.entry-box h2 {
  font-size: 19px;
  margin-bottom: 8px;
}

.entry-box p {
  font-size: 14px;
  color: var(--color-gray);
  margin-bottom: 18px;
}

.entry-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

/* --------------------------------------------------------------------------
   12. Pages —— 404
   -------------------------------------------------------------------------- */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 40px 24px;
}

.error-section {
  text-align: center;
  max-width: 560px;
}

.error-code {
  font-family: var(--font-serif);
  font-size: 80px;
  font-weight: 700;
  color: var(--color-red);
  line-height: 1;
  margin-bottom: 12px;
}

.error-section h1 {
  font-size: 26px;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: var(--color-gray);
  margin-bottom: 24px;
  line-height: 1.7;
}

.error-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

/* --------------------------------------------------------------------------
   13. Responsive —— 响应式断点
   -------------------------------------------------------------------------- */

/* 平板及以下 */
@media (max-width: 992px) {
  .service-entry-body {
    grid-template-columns: 1fr;
  }

  .service-media img {
    aspect-ratio: 16 / 8;
    max-height: 220px;
  }

  .submission-content {
    grid-template-columns: 1fr;
  }

  .content-figure img {
    aspect-ratio: 16 / 8;
    max-height: 240px;
  }

  .brand-intro {
    grid-template-columns: 1fr;
  }

  .intro-figure img {
    aspect-ratio: 16 / 8;
    max-height: 280px;
  }

  .hero-layout {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .hero-side {
    border-left: none;
    border-top: 3px solid var(--color-red);
    padding-left: 0;
    padding-top: 20px;
  }

  .layout-shell,
  .layout-shell.sidebar-right {
    grid-template-columns: 1fr;
  }

  .page-layout.sidebar-left {
    grid-template-columns: 1fr;
  }

  .sidebar {
    order: 2;
  }

  .main-content {
    order: 1;
  }

  /* 侧栏在左时移动端调整顺序 */
  .page-layout.sidebar-left .sidebar {
    order: 2;
  }

  .page-layout.sidebar-left .main-content {
    order: 1;
  }
}

/* 手机端 */
@media (max-width: 768px) {
  .site-slogan {
    display: none;
  }

  .header-inner {
    padding-top: 12px;
    padding-bottom: 12px;
    gap: 10px;
  }

  .site-brand {
    font-size: 22px;
  }

  .nav-toggle {
    display: flex;
    margin-left: auto;
  }

  .main-nav {
    order: 4;
    width: 100%;
    border-top: none;
    margin-top: 0;
    padding-top: 0;
  }

  .main-nav ul {
    display: none;
    flex-direction: column;
    gap: 0;
    border-top: 1px solid var(--color-line);
    padding-top: 8px;
    margin-top: 8px;
  }

  .main-nav ul.is-open {
    display: flex;
  }

  .main-nav a {
    padding: 12px 4px;
    font-size: 16px;
    border-bottom: 1px solid var(--color-line);
  }

  .main-nav a.is-current {
    border-bottom-color: var(--color-red);
  }

  /* 页面标题区 */
  .page-title-area {
    padding-top: 16px;
    padding-bottom: 16px;
  }

  .page-title {
    font-size: 25px;
  }

  /* 页脚 */
  .footer-inner {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    padding-top: 32px;
  }

  /* 首页 */
  .hero-layout {
    padding: 28px 20px;
  }

  .hero-main h1 {
    font-size: 25px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

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

  .content-media-primary {
    padding: 0 20px;
  }

  .content-media-primary img {
    aspect-ratio: 4 / 3;
  }

  .services-overview,
  .process-section,
  .help-section {
    padding-left: 20px;
    padding-right: 20px;
  }

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

  .process-steps {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }

  .help-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  /* 内页 */
  .inner-main {
    padding-bottom: 24px;
  }

  .layout-shell,
  .layout-shell.sidebar-right,
  .page-layout.sidebar-left {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-top: 20px;
    padding-left: 20px;
    padding-right: 20px;
  }

  .side-panel,
  .content-side,
  .sidebar {
    order: 2;
  }

  .main-content,
  .content-main {
    order: 1;
  }

  /* 服务页 */
  .service-entry-head {
    padding: 14px 16px;
  }

  .service-entry-body {
    padding: 16px;
  }

  .service-media img {
    max-height: 180px;
  }

  /* 目录页 */
  .site-list {
    grid-template-columns: 1fr;
  }

  .submission-content {
    gap: 20px;
  }

  /* 关于页 */
  .principle-grid {
    grid-template-columns: 1fr;
  }

  .brand-intro {
    gap: 24px;
    padding-top: 24px;
  }

  .log-list li {
    flex-direction: column;
    gap: 2px;
  }

  /* 帮助页 */
  .feedback-entry {
    grid-template-columns: 1fr;
  }

  /* 联系页 */
  .contact-cards {
    grid-template-columns: 1fr;
  }

  .contact-figure img {
    aspect-ratio: 4 / 3;
  }

  /* 404 */
  .error-code {
    font-size: 64px;
  }

  /* 相关内容 */
  .related-links {
    padding-left: 20px;
    padding-right: 20px;
  }
}

/* 小屏手机 */
@media (max-width: 480px) {
  .process-steps {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 20px;
  }

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

  .site-brand {
    font-size: 20px;
  }

  .page-title {
    font-size: 22px;
  }

  .hero-main h1 {
    font-size: 22px;
  }
}

/* --------------------------------------------------------------------------
   14. Accessibility —— 可访问性辅助
   -------------------------------------------------------------------------- */

:focus-visible {
  outline: 2px solid var(--color-red);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}