/* ==========================================================
   吃瓜群众在线爆料 · 整站样式表
   视觉方向：报纸编辑风（黑白灰 + 朱砂红点缀）
   字体：Noto Serif SC（标题）/ Noto Sans SC（正文）
   ========================================================== */

/* ----------------------------------------------------------
   Base · 基础变量与重置
   ---------------------------------------------------------- */
:root {
  --color-ink: #1a1a1a;
  --color-paper: #f5f2eb;
  --color-accent: #b30000;
  --color-gray: #6b6b6b;
  --color-white: #ffffff;
  --color-line: #d8d4ca;
  --color-line-dark: #b0aca2;
  --font-serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --header-h: 64px;
  --container-w: 1200px;
  --radius: 6px;
}

*,
*::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: 1.8;
  color: var(--color-ink);
  background: var(--color-white);
}

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

a {
  color: var(--color-ink);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.4;
}

/* ----------------------------------------------------------
   Layout · 全站骨架
   ---------------------------------------------------------- */
.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

.header-inner {
  max-width: var(--container-w);
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-shrink: 0;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-ink);
  letter-spacing: 0.02em;
}

.brand-tagline {
  font-size: 13px;
  color: var(--color-gray);
  white-space: nowrap;
}

.main-nav {
  display: block;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-list li {
  position: relative;
}

.nav-link {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  color: var(--color-ink);
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

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

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

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: none;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  align-items: center;
}

.toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-ink);
  transition: transform 0.2s, opacity 0.2s;
}

.site-main {
  flex: 1;
  width: 100%;
}

.site-footer {
  background: var(--color-ink);
  color: #c8c4bb;
  margin-top: 64px;
}

.footer-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 48px 24px 24px;
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 48px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  margin-top: 12px;
}

.footer-brand-name {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-white);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.footer-title {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid #3a3a3a;
}

.footer-group ul li {
  margin-bottom: 6px;
}

.footer-group ul a {
  font-size: 14px;
  color: #a8a49b;
  transition: color 0.2s;
}

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

.footer-bottom {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 16px 24px;
  border-top: 1px solid #333;
  font-size: 13px;
  color: #8a867d;
  text-align: center;
}

/* ----------------------------------------------------------
   Components · 通用组件
   ---------------------------------------------------------- */
/* 按钮 */
.btn-primary {
  display: inline-block;
  padding: 12px 28px;
  background: var(--color-accent);
  color: var(--color-white);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.btn-primary:hover {
  background: #8f0000;
  color: var(--color-white);
}

.btn-outline {
  display: inline-block;
  padding: 12px 28px;
  background: transparent;
  color: var(--color-ink);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid var(--color-ink);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.btn-outline:hover {
  background: var(--color-ink);
  color: var(--color-white);
}

.btn-secondary {
  display: inline-block;
  padding: 12px 28px;
  background: var(--color-paper);
  color: var(--color-ink);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid var(--color-line-dark);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.2s;
}

.btn-secondary:hover {
  background: #e5e0d5;
  color: var(--color-ink);
}

/* 区块标题 */
.section-header {
  margin-bottom: 32px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-ink);
}

.section-header h2 {
  font-size: 24px;
  color: var(--color-ink);
}

.section-desc {
  margin-top: 8px;
  font-size: 15px;
  color: var(--color-gray);
  max-width: 720px;
}

/* 文本链接 */
.text-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  border-bottom: 1px solid var(--color-accent);
  padding-bottom: 2px;
}

.text-link:hover {
  color: #8f0000;
  border-bottom-color: #8f0000;
}

/* 面包屑 */
.breadcrumb {
  font-size: 13px;
  color: var(--color-gray);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

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

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

.breadcrumb-sep {
  color: var(--color-line-dark);
}

.breadcrumb-current {
  color: var(--color-ink);
  font-weight: 500;
}

/* 页面标题区 */
.page-header {
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--color-ink);
}

.page-title {
  font-size: 32px;
  color: var(--color-ink);
}

.page-intro {
  font-size: 16px;
  color: var(--color-gray);
  margin-top: 12px;
  max-width: 760px;
}

/* FAQ 折叠 */
.faq-list {
  border-top: 1px solid var(--color-line);
}

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

.faq-item summary {
  padding: 16px 40px 16px 0;
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  position: relative;
  list-style: none;
  color: var(--color-ink);
  transition: color 0.2s;
}

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

.faq-item summary:hover {
  color: var(--color-accent);
}

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  font-weight: 400;
  color: var(--color-accent);
  transition: transform 0.2s;
}

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

.faq-item .faq-answer,
.faq-item p {
  padding: 0 24px 16px 0;
  font-size: 15px;
  color: var(--color-gray);
  line-height: 1.8;
}

/* 侧栏通用 */
.sidebar-card {
  background: var(--color-paper);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 24px;
}

.sidebar-card h2 {
  font-size: 18px;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line-dark);
}

.sidebar-card p {
  font-size: 14px;
  color: var(--color-gray);
  margin-bottom: 12px;
}

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

.sidebar-links li a {
  font-size: 14px;
  color: var(--color-ink);
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.sidebar-links li a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.sidebar-figure {
  margin-top: 16px;
}

.sidebar-figure img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: var(--radius);
}

.sidebar-figure figcaption {
  font-size: 12px;
  color: var(--color-gray);
  margin-top: 8px;
  line-height: 1.5;
}

.sidebar-link {
  display: inline-block;
  margin-top: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  border-bottom: 1px solid var(--color-accent);
  padding-bottom: 2px;
}

.sidebar-link:hover {
  color: #8f0000;
  border-bottom-color: #8f0000;
}

.sidebar-text {
  font-size: 13px;
  color: var(--color-gray);
  line-height: 1.7;
}

/* 图片通用约束 */
figure {
  margin: 0;
}

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

/* ----------------------------------------------------------
   Pages · 首页
   ---------------------------------------------------------- */
/* Hero */
.hero-section {
  background: var(--color-paper);
  border-bottom: 1px solid var(--color-line);
}

.hero-content {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 64px 24px;
  display: grid;
  grid-template-columns: 1fr 440px;
  gap: 48px;
  align-items: center;
}

.hero-content h1 {
  font-size: 36px;
  line-height: 1.3;
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 16px;
  color: var(--color-gray);
  margin-bottom: 24px;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.quick-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  max-width: 480px;
}

.quick-link {
  display: block;
  padding: 14px 16px;
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink);
  transition: border-color 0.2s, color 0.2s;
}

.quick-link:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.hero-figure {
  width: 100%;
  height: 340px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-line);
}

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

/* 最新方法与话题 */
.latest-section {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 64px 24px 0;
}

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

.method-card {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.method-card:hover {
  border-color: var(--color-line-dark);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
}

.card-date {
  font-size: 13px;
  color: var(--color-gray);
  margin-bottom: 8px;
  font-family: var(--font-serif);
}

.method-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.method-card p {
  font-size: 14px;
  color: var(--color-gray);
  flex: 1;
  margin-bottom: 12px;
}

.card-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
}

/* 服务方向棋盘 */
.service-board {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 64px 24px 0;
}

.board-list {
  display: flex;
  flex-direction: column;
}

.board-row {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 40px;
  align-items: center;
  padding: 32px 0;
  border-bottom: 1px solid var(--color-line);
}

.board-row:first-child {
  border-top: 1px solid var(--color-line);
}

.board-row.reverse {
  grid-template-columns: 360px 1fr;
}

.board-row.reverse .board-text {
  order: 2;
}

.board-row.reverse .board-figure {
  order: 1;
}

.board-text h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.board-text p {
  font-size: 15px;
  color: var(--color-gray);
  margin-bottom: 8px;
}

.board-text .text-link {
  margin-top: 8px;
}

.board-figure {
  width: 100%;
  height: 220px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-line);
}

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

/* 合作流程预览 */
.process-preview {
  background: var(--color-paper);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  padding: 64px 0;
}

.process-preview .section-header,
.process-preview .timeline-horizontal {
  max-width: var(--container-w);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.timeline-horizontal {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
}

.timeline-step {
  position: relative;
  padding-top: 32px;
}

.timeline-step::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-line-dark);
}

.timeline-step::after {
  content: "";
  position: absolute;
  top: -5px;
  left: 0;
  width: 12px;
  height: 12px;
  background: var(--color-accent);
  border-radius: 50%;
}

.step-num {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.timeline-step h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.timeline-step p {
  font-size: 14px;
  color: var(--color-gray);
  margin-bottom: 8px;
}

.step-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
}

/* 工具与方法摘要 */
.method-summary {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 64px 24px 0;
}

.method-list {
  border-top: 1px solid var(--color-line);
}

.method-row {
  display: block;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-line);
  transition: padding-left 0.2s;
}

.method-row:hover {
  padding-left: 12px;
}

.method-row h3 {
  font-size: 18px;
  margin-bottom: 4px;
}

.method-row p {
  font-size: 15px;
  color: var(--color-gray);
}

/* 常见问题摘要 */
.faq-summary {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 64px 24px 0;
}

.faq-summary .faq-list {
  margin-bottom: 24px;
}

/* 合作反馈 CTA */
.contact-cta {
  background: var(--color-ink);
  color: var(--color-white);
  margin-top: 64px;
}

.cta-content {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 64px 24px;
  text-align: center;
}

.cta-content h2 {
  font-size: 24px;
  color: var(--color-white);
  margin-bottom: 12px;
}

.cta-content p {
  font-size: 15px;
  color: #a8a49b;
  max-width: 640px;
  margin: 0 auto 24px;
}

/* ----------------------------------------------------------
   Pages · 内页通用布局
   ---------------------------------------------------------- */
.inner-main {
  width: 100%;
}

.page-layout {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 32px 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 40px;
  align-items: start;
}

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

/* 内页标题区 */
.page-title-area {
  margin-bottom: 32px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-line);
}

/* ----------------------------------------------------------
   Pages · 服务方向页
   ---------------------------------------------------------- */
.service-anchor-nav {
  background: var(--color-paper);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 16px 24px;
  margin-bottom: 32px;
}

.anchor-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
}

.anchor-list li a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-ink);
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.anchor-list li a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.service-detail-block {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 32px;
  align-items: start;
  padding: 32px 0;
  border-bottom: 1px solid var(--color-line);
}

.service-detail-block:first-of-type {
  padding-top: 0;
}

.service-text h2 {
  font-size: 22px;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line);
}

.service-text p {
  font-size: 15px;
  color: var(--color-gray);
  margin-bottom: 8px;
}

.service-text strong {
  color: var(--color-ink);
  font-weight: 600;
}

.service-figure {
  width: 100%;
  height: 180px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-line);
}

.service-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.delivery-standard-block {
  padding: 32px 0;
}

.delivery-standard-block h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.delivery-standard-block p {
  font-size: 15px;
  color: var(--color-gray);
  margin-bottom: 16px;
}

.standard-list {
  border-top: 1px solid var(--color-line);
}

.standard-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--color-line);
  font-size: 15px;
  color: var(--color-gray);
  position: relative;
  padding-left: 20px;
}

.standard-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

/* ----------------------------------------------------------
   Pages · 合作流程页
   ---------------------------------------------------------- */
.process-timeline {
  margin-bottom: 48px;
}

.process-timeline h2,
.deliverable-section h2 {
  font-size: 24px;
  margin-bottom: 8px;
}

.timeline-steps {
  margin-top: 24px;
  border-left: 2px solid var(--color-line-dark);
  padding-left: 32px;
}

.timeline-item {
  position: relative;
  padding-bottom: 32px;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -39px;
  top: 6px;
  width: 12px;
  height: 12px;
  background: var(--color-accent);
  border-radius: 50%;
  border: 2px solid var(--color-white);
}

.step-meta {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.step-number {
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 700;
  color: var(--color-accent);
}

.step-name {
  font-size: 18px;
}

.step-owner {
  font-size: 13px;
  color: var(--color-gray);
  background: var(--color-paper);
  border: 1px solid var(--color-line);
  border-radius: 4px;
  padding: 2px 10px;
}

.step-body p {
  font-size: 15px;
  color: var(--color-gray);
  margin-bottom: 8px;
}

.step-output {
  font-size: 14px;
  color: var(--color-ink);
  background: var(--color-paper);
  border-left: 3px solid var(--color-accent);
  padding: 8px 16px;
}

.deliverable-section {
  margin-bottom: 48px;
}

.deliverable-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 16px;
  font-size: 14px;
}

.deliverable-table th {
  background: var(--color-ink);
  color: var(--color-white);
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
}

.deliverable-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-line);
  color: var(--color-gray);
}

.deliverable-table tbody tr:nth-child(even) {
  background: var(--color-paper);
}

.deliverable-table tbody tr:hover {
  background: #ece8df;
}

.media-block {
  margin: 32px 0;
}

.content-figure {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.content-figure img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.content-figure figcaption {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--color-gray);
  background: var(--color-paper);
}

.related-links {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding: 16px 0;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.related-links-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink);
}

.related-links-item {
  font-size: 14px;
  color: var(--color-accent);
  border-bottom: 1px solid transparent;
}

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

/* 侧栏需求资料清单 */
.sidebar-list li {
  padding: 10px 0;
  border-bottom: 1px solid var(--color-line);
  font-size: 14px;
  color: var(--color-gray);
  display: flex;
  gap: 8px;
  align-items: baseline;
}

.sidebar-list li::before {
  content: "·";
  color: var(--color-accent);
  font-weight: 700;
}

/* ----------------------------------------------------------
   Pages · 工具与方法页
   ---------------------------------------------------------- */
.page-heading {
  margin-bottom: 32px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-line);
}

.page-heading p {
  font-size: 15px;
  color: var(--color-gray);
}

.method-section {
  margin-bottom: 48px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--color-line);
}

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

.section-heading {
  margin-bottom: 20px;
}

.section-heading h2 {
  font-size: 24px;
  margin-bottom: 8px;
}

.section-heading p {
  font-size: 15px;
  color: var(--color-gray);
}

.table-wrap {
  overflow-x: auto;
  margin-bottom: 16px;
}

.method-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  min-width: 560px;
}

.method-table thead th {
  background: var(--color-ink);
  color: var(--color-white);
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
}

.method-table tbody td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-line);
  color: var(--color-gray);
}

.method-table tbody tr:nth-child(even) {
  background: var(--color-paper);
}

.source-priority-list {
  counter-reset: priority;
}

.source-priority-list li {
  position: relative;
  padding: 16px 0 16px 48px;
  border-bottom: 1px solid var(--color-line);
  counter-increment: priority;
}

.source-priority-list li::before {
  content: counter(priority);
  position: absolute;
  left: 0;
  top: 16px;
  width: 32px;
  height: 32px;
  background: var(--color-accent);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 700;
}

.source-priority-list li h3 {
  font-size: 16px;
  margin-bottom: 4px;
}

.source-priority-list li p {
  font-size: 14px;
  color: var(--color-gray);
}

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

.verify-step {
  background: var(--color-paper);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
}

.verify-step .step-number {
  display: block;
  margin-bottom: 8px;
}

.verify-step h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.verify-step p {
  font-size: 14px;
  color: var(--color-gray);
}

.method-figure {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.method-figure img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.method-figure figcaption {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--color-gray);
  background: var(--color-paper);
}

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

.report-block {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
}

.report-block h3 {
  font-size: 16px;
  margin-bottom: 8px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line);
}

.report-block p {
  font-size: 14px;
  color: var(--color-gray);
}

.delivery-note {
  background: var(--color-paper);
  border-left: 3px solid var(--color-accent);
  padding: 24px;
  margin-top: 32px;
}

.delivery-note h2 {
  font-size: 18px;
  margin-bottom: 8px;
}

.delivery-note p {
  font-size: 15px;
  color: var(--color-gray);
}

/* 侧栏链接按钮 */
.sidebar-link-btn {
  display: block;
  margin-top: 8px;
  padding: 10px 16px;
  background: var(--color-accent);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius);
  text-align: center;
  transition: background 0.2s;
}

.sidebar-link-btn:hover {
  background: #8f0000;
  color: var(--color-white);
}

/* ----------------------------------------------------------
   Pages · 常见问题页
   ---------------------------------------------------------- */
.faq-quick-nav {
  background: var(--color-paper);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 16px 24px;
  margin-bottom: 32px;
}

.faq-quick-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
}

.faq-quick-nav ul li a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-ink);
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.faq-quick-nav ul li a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

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

.faq-section h2 {
  font-size: 22px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-ink);
}

/* ----------------------------------------------------------
   Pages · 合作反馈页
   ---------------------------------------------------------- */
.section-block {
  margin-bottom: 48px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--color-line);
}

.section-block h2 {
  font-size: 22px;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line);
}

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

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

.requirement-item {
  background: var(--color-paper);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 16px 20px;
}

.requirement-item h3 {
  font-size: 15px;
  margin-bottom: 4px;
  color: var(--color-ink);
}

.requirement-item p {
  font-size: 14px;
  color: var(--color-gray);
}

.feedback-steps {
  counter-reset: feedback;
}

.feedback-step {
  position: relative;
  padding: 16px 0 16px 48px;
  border-bottom: 1px solid var(--color-line);
  counter-increment: feedback;
}

.feedback-step::before {
  content: counter(feedback);
  position: absolute;
  left: 0;
  top: 16px;
  width: 32px;
  height: 32px;
  background: var(--color-accent);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 700;
}

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

.feedback-step p {
  font-size: 14px;
  color: var(--color-gray);
}

.notice-list li {
  padding: 16px 0;
  border-bottom: 1px solid var(--color-line);
}

.notice-list li h3 {
  font-size: 16px;
  margin-bottom: 4px;
  position: relative;
  padding-left: 20px;
}

.notice-list li h3::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

.notice-list li p {
  font-size: 14px;
  color: var(--color-gray);
}

/* ----------------------------------------------------------
   Pages · 404 页
   ---------------------------------------------------------- */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
}

.error-section {
  max-width: 640px;
  padding: 48px 24px;
  text-align: center;
}

.error-code {
  font-family: var(--font-serif);
  font-size: 72px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 16px;
}

.error-section h1 {
  font-size: 28px;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: var(--color-gray);
  margin-bottom: 32px;
}

.error-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.error-links {
  border-top: 1px solid var(--color-line);
  padding-top: 24px;
}

.error-links p {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
}

.error-links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  justify-content: center;
}

.error-links ul li a {
  font-size: 14px;
  color: var(--color-gray);
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.error-links ul li a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* ----------------------------------------------------------
   Responsive · 响应式
   ---------------------------------------------------------- */
/* 1024px 断点 */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr 360px;
    gap: 32px;
  }

  .card-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .board-row {
    grid-template-columns: 1fr 280px;
    gap: 24px;
  }

  .board-row.reverse {
    grid-template-columns: 280px 1fr;
  }

  .timeline-horizontal {
    gap: 16px;
  }

  .page-layout {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 24px;
  }

  .service-detail-block {
    grid-template-columns: 1fr 220px;
    gap: 24px;
  }

  .verify-steps,
  .report-structure {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .requirement-list {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
}

/* 768px 断点 */
@media (max-width: 768px) {
  .header-inner {
    padding: 0 16px;
  }

  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-line);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
  }

  .nav-list.is-open {
    display: flex;
  }

  .nav-list li {
    border-bottom: 1px solid var(--color-line);
  }

  .nav-list li:last-child {
    border-bottom: none;
  }

  .nav-link {
    padding: 14px 8px;
    font-size: 16px;
    border-bottom: none;
  }

  .nav-link.is-current {
    border-bottom: none;
    background: var(--color-paper);
  }

  /* 首页 */
  .hero-content {
    grid-template-columns: 1fr;
    padding: 40px 16px;
    gap: 24px;
  }

  .hero-content h1 {
    font-size: 28px;
  }

  .hero-figure {
    height: 240px;
  }

  .latest-section,
  .service-board,
  .method-summary,
  .faq-summary {
    padding-left: 16px;
    padding-right: 16px;
  }

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

  .board-row,
  .board-row.reverse {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .board-row.reverse .board-text {
    order: 1;
  }

  .board-row.reverse .board-figure {
    order: 2;
  }

  .board-figure {
    height: 200px;
  }

  .timeline-horizontal {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .process-preview .section-header,
  .process-preview .timeline-horizontal {
    padding-left: 16px;
    padding-right: 16px;
  }

  .cta-content {
    padding: 48px 16px;
  }

  /* 内页 */
  .page-layout {
    grid-template-columns: 1fr;
    padding: 24px 16px;
    gap: 32px;
  }

  .page-title {
    font-size: 26px;
  }

  .service-detail-block {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .service-figure {
    height: 200px;
  }

  .verify-steps,
  .report-structure {
    grid-template-columns: 1fr;
  }

  .requirement-list {
    grid-template-columns: 1fr;
  }

  .deliverable-table {
    font-size: 13px;
  }

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

  /* 页脚 */
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 32px 16px 16px;
  }

  .footer-links {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .footer-bottom {
    padding: 16px;
  }
}

/* 480px 断点 */
@media (max-width: 480px) {
  .brand-tagline {
    display: none;
  }

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

  .hero-actions .btn-primary,
  .hero-actions .btn-outline {
    text-align: center;
  }

  .quick-links {
    grid-template-columns: 1fr;
  }

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

  .error-code {
    font-size: 56px;
  }

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

  .error-actions .btn-primary,
  .error-actions .btn-secondary {
    text-align: center;
  }

  .timeline-steps {
    padding-left: 24px;
  }

  .timeline-item::before {
    left: -31px;
  }

  .step-meta {
    gap: 8px;
  }

  .anchor-list {
    flex-direction: column;
    gap: 4px;
  }

  .faq-quick-nav ul {
    flex-direction: column;
    gap: 4px;
  }

  .related-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}