/* ==========================================================
   黑料吃瓜网app · 全站样式表
   法律专业风 · 衬线标题 · 中性正文 · 规则分隔
   ========================================================== */

/* ----------------------------------------------------------
   Base · 基础变量与重置
   ---------------------------------------------------------- */
:root {
  --color-primary: #1a365d;
  --color-accent: #2b6cb0;
  --color-bg-light: #f7fafc;
  --color-white: #ffffff;
  --color-text: #4a5568;
  --color-heading: #1a365d;
  --color-border: #e2e8f0;
  --color-muted: #718096;

  --font-serif: Georgia, "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-sans: Arial, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;

  --container-width: 1200px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  --shadow-sm: 0 1px 3px rgba(26, 54, 93, 0.08);
  --shadow-md: 0 4px 12px rgba(26, 54, 93, 0.1);
  --shadow-lg: 0 8px 24px rgba(26, 54, 93, 0.12);

  --header-height: 76px;
  --transition-base: 0.2s 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-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg-light);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-base);
}

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-heading);
}

p {
  margin-bottom: 1rem;
}

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

/* ----------------------------------------------------------
   Layout · 全局骨架容器
   ---------------------------------------------------------- */
.site-header {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.site-main {
  min-height: 60vh;
}

.site-main.inner-main {
  padding-bottom: 64px;
}

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

.site-footer {
  background-color: var(--color-primary);
  color: rgba(255, 255, 255, 0.85);
  margin-top: 0;
}

.footer-container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 56px 24px 32px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
}

.footer-bottom {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 20px 24px 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.copyright {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 0;
  text-align: center;
}

/* ----------------------------------------------------------
   Components · 页头导航
   ---------------------------------------------------------- */
.brand {
  flex-shrink: 0;
}

.brand-link {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
  letter-spacing: 0.5px;
}

.brand-tagline {
  font-size: 12px;
  color: var(--color-muted);
  line-height: 1.2;
  letter-spacing: 0.3px;
}

.main-nav {
  flex: 1;
  display: flex;
  justify-content: flex-end;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-block;
  padding: 8px 0;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  position: relative;
  transition: color var(--transition-base);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--transition-base);
}

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

.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);
}

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

.nav-toggle:hover {
  background-color: var(--color-bg-light);
}

.toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 1px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* ----------------------------------------------------------
   Components · 按钮
   ---------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  cursor: pointer;
  min-height: 44px;
}

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

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

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

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

/* ----------------------------------------------------------
   Components · 通用区块标题
   ---------------------------------------------------------- */
.section-title {
  font-size: 28px;
  margin-bottom: 12px;
}

.section-desc,
.section-lead,
.section-intro {
  font-size: 16px;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: 0;
}

.section-header,
.section-heading,
.section-head {
  margin-bottom: 40px;
  max-width: 760px;
}

.section-header .section-title,
.section-heading .section-title,
.section-head .section-title {
  margin-bottom: 10px;
}

/* ----------------------------------------------------------
   Components · 面包屑
   ---------------------------------------------------------- */
.breadcrumb {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 20px 24px 0;
  font-size: 14px;
  color: var(--color-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

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

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

.breadcrumb-sep {
  color: var(--color-muted);
  font-size: 12px;
}

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

/* ----------------------------------------------------------
   Components · 页面标题区
   ---------------------------------------------------------- */
.page-header {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 28px 24px 8px;
}

.page-title {
  font-size: 36px;
  margin-bottom: 0;
}

.page-title-area {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 8px 24px 32px;
}

.page-title-area .container {
  padding: 0;
}

.page-subtitle,
.page-intro,
.page-lead {
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  max-width: 780px;
  margin-bottom: 0;
}

.page-title-container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 8px 24px 32px;
}

/* ----------------------------------------------------------
   Components · 卡片
   ---------------------------------------------------------- */
.service-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.service-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.service-media {
  overflow: hidden;
  background-color: var(--color-bg-light);
  aspect-ratio: 16 / 10;
}

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

.service-info {
  padding: 24px;
}

.service-name {
  font-size: 20px;
  margin-bottom: 10px;
}

.service-target {
  font-size: 14px;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 8px;
}

.service-desc {
  font-size: 15px;
  line-height: 1.65;
  margin-bottom: 12px;
}

.service-delivery {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 0;
}

/* ----------------------------------------------------------
   Components · 徽标
   ---------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 14px;
  font-size: 13px;
  font-weight: 600;
  border-radius: 999px;
  line-height: 1.4;
}

.badge-published {
  background-color: #e6fffa;
  color: #234e52;
  border: 1px solid #81e6d9;
}

.status-badge {
  display: inline-block;
  padding: 3px 12px;
  font-size: 13px;
  font-weight: 600;
  border-radius: 999px;
  background-color: #e6fffa;
  color: #234e52;
  border: 1px solid #81e6d9;
}

/* ----------------------------------------------------------
   Components · 表格
   ---------------------------------------------------------- */
.table-wrap,
.table-wrapper,
.compare-table-wrap {
  overflow-x: auto;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.compare-table,
.delivery-table,
.status-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

.compare-table th,
.compare-table td,
.delivery-table th,
.delivery-table td,
.status-table th,
.status-table td {
  padding: 14px 20px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

.compare-table thead th,
.delivery-table thead th,
.status-table thead th {
  background-color: var(--color-bg-light);
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
  color: var(--color-heading);
  white-space: nowrap;
}

.compare-table tbody tr:last-child td,
.delivery-table tbody tr:last-child td,
.status-table tbody tr:last-child td {
  border-bottom: none;
}

.compare-table tbody tr:hover,
.delivery-table tbody tr:hover,
.status-table tbody tr:hover {
  background-color: var(--color-bg-light);
}

/* ----------------------------------------------------------
   Components · FAQ 手风琴
   ---------------------------------------------------------- */
.faq-list,
.troubleshoot-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item,
.troubleshoot-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.faq-question,
.troubleshoot-question {
  padding: 18px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-heading);
  cursor: pointer;
  position: relative;
  padding-right: 48px;
  list-style: none;
  transition: background-color var(--transition-base);
}

.faq-question::-webkit-details-marker,
.troubleshoot-question::-webkit-details-marker {
  display: none;
}

.faq-question::after,
.troubleshoot-question::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 22px;
  font-weight: 400;
  color: var(--color-accent);
  transition: transform var(--transition-base);
}

.faq-item[open] .faq-question,
.troubleshoot-item[open] .troubleshoot-question {
  background-color: var(--color-bg-light);
}

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

.faq-answer,
.troubleshoot-answer {
  padding: 0 24px 20px;
  font-size: 15px;
  line-height: 1.7;
}

/* ----------------------------------------------------------
   Components · 步骤条
   ---------------------------------------------------------- */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}

.step-item,
.process-step {
  position: relative;
  padding-top: 48px;
  text-align: left;
}

.step-num,
.step-number {
  position: absolute;
  top: 0;
  left: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-white);
  background-color: var(--color-accent);
  border-radius: var(--radius-sm);
}

.step-title {
  font-size: 17px;
  margin-bottom: 8px;
}

.step-desc,
.step-text {
  font-size: 14px;
  line-height: 1.65;
  color: var(--color-text);
  margin-bottom: 0;
}

/* ----------------------------------------------------------
   Components · 相关链接
   ---------------------------------------------------------- */
.related-links {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px 0;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

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

.related-links-item {
  font-size: 14px;
  color: var(--color-accent);
  padding: 6px 0;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base);
}

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

/* ----------------------------------------------------------
   Components · 页脚
   ---------------------------------------------------------- */
.footer-col h3.footer-title {
  font-size: 17px;
  color: var(--color-white);
  margin-bottom: 18px;
  font-family: var(--font-serif);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
  transition: color var(--transition-base);
}

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

/* ----------------------------------------------------------
   Pages · 首页
   ---------------------------------------------------------- */

/* Hero */
.hero {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
}

.hero-container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 64px 24px 72px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}

.hero-content {
  max-width: 580px;
}

.hero-title {
  font-size: 40px;
  line-height: 1.25;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: 17px;
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: 32px;
}

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

.hero-media {
  background-color: var(--color-bg-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  box-shadow: var(--shadow-md);
}

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

/* 核心服务对比 */
.service-compare {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 72px 24px 24px;
}

.service-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  margin-bottom: 48px;
}

.compare-table-wrap {
  margin-top: 40px;
}

/* 版本摘要 */
.version-summary {
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 64px 0;
}

.version-summary .section-title {
  margin-bottom: 16px;
}

.version-summary .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.version-status {
  margin-bottom: 16px;
}

.version-desc {
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 20px;
}

.link-more {
  font-size: 15px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

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

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

.version-points {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.point-item {
  padding: 20px 24px;
  background-color: var(--color-bg-light);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.point-title {
  font-size: 16px;
  margin-bottom: 6px;
}

.point-desc {
  font-size: 14px;
  line-height: 1.65;
  color: var(--color-text);
  margin-bottom: 0;
}

/* 合作流程预览 */
.cooperation-preview {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 72px 24px 24px;
}

.preview-more {
  margin-top: 40px;
  text-align: center;
}

/* FAQ 区块 */
.faq-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 72px 24px 24px;
}

/* CTA 行动区 */
.cta-section {
  background-color: var(--color-primary);
  padding: 64px 24px;
  margin-top: 48px;
  text-align: center;
}

.cta-title {
  font-size: 28px;
  color: var(--color-white);
  margin-bottom: 16px;
}

.cta-desc {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.8);
  max-width: 640px;
  margin: 0 auto 32px;
}

.cta-section .btn-primary {
  background-color: var(--color-white);
  color: var(--color-primary);
  border-color: var(--color-white);
}

.cta-section .btn-primary:hover {
  background-color: transparent;
  color: var(--color-white);
}

/* ----------------------------------------------------------
   Pages · 企业介绍 about
   ---------------------------------------------------------- */
.intro-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 24px;
}

.intro-container {
  display: grid;
  grid-template-columns: 1fr 0.85fr;
  gap: 56px;
  align-items: center;
}

.intro-content .section-title {
  margin-bottom: 20px;
}

.intro-content p {
  font-size: 15px;
  line-height: 1.75;
  margin-bottom: 16px;
}

.intro-figure {
  background-color: var(--color-bg-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  box-shadow: var(--shadow-md);
}

.intro-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 工作方法 */
.method-section {
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 64px 0;
}

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

.method-container .section-title {
  margin-bottom: 8px;
}

.method-container .section-lead {
  margin-bottom: 40px;
}

.method-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.method-item {
  position: relative;
  padding: 32px 28px;
  background-color: var(--color-bg-light);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.method-number {
  display: block;
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 16px;
  line-height: 1;
}

.method-title {
  font-size: 18px;
  margin-bottom: 10px;
}

.method-body p {
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 0;
}

/* 服务原则 */
.principles-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 64px 24px 24px;
}

.principles-container .section-title {
  margin-bottom: 8px;
}

.principles-container .section-lead {
  margin-bottom: 40px;
}

.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.principle-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: box-shadow var(--transition-base);
}

.principle-card:hover {
  box-shadow: var(--shadow-md);
}

.principle-title {
  font-size: 17px;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-bg-light);
}

.principle-card p {
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 0;
}

/* 内页 CTA */
.cta-container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 64px 24px;
  text-align: center;
}

.cta-title {
  font-size: 26px;
  margin-bottom: 12px;
}

.cta-text {
  font-size: 16px;
  color: var(--color-text);
  max-width: 600px;
  margin: 0 auto 28px;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 32px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-white);
  background-color: var(--color-accent);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-md);
  min-height: 44px;
  transition: all var(--transition-base);
}

.cta-button:hover {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

/* ----------------------------------------------------------
   Pages · 服务内容 service
   ---------------------------------------------------------- */
.service-matrix-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 24px;
}

.service-matrix-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.service-matrix-grid .service-card {
  padding: 0;
}

.service-matrix-grid .service-card h3 {
  font-size: 19px;
  padding: 24px 24px 0;
  margin-bottom: 10px;
}

.service-matrix-grid .service-card > p {
  font-size: 14px;
  line-height: 1.7;
  padding: 0 24px;
  margin-bottom: 16px;
}

.service-points {
  padding: 0 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.service-points li {
  font-size: 14px;
  color: var(--color-text);
  padding-left: 20px;
  position: relative;
  line-height: 1.5;
}

.service-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  background-color: var(--color-accent);
  border-radius: 50%;
}

/* 适用场景 */
.scenarios-section {
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 64px 0;
}

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

.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.scenario-item {
  background-color: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.scenario-image-wrap {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: var(--color-border);
}

.scenario-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.scenario-content {
  padding: 24px;
}

.scenario-content h3 {
  font-size: 18px;
  margin-bottom: 10px;
}

.scenario-content p {
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 0;
}

/* 交付标准 */
.delivery-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 64px 24px 24px;
}

/* ----------------------------------------------------------
   Pages · 版本记录 version
   ---------------------------------------------------------- */
.mechanism-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 24px;
}

.mechanism-layout {
  display: grid;
  grid-template-columns: 1fr 0.85fr;
  gap: 56px;
  align-items: start;
}

.mechanism-text .section-title {
  margin-bottom: 20px;
}

.text-block {
  font-size: 15px;
  line-height: 1.75;
  margin-bottom: 16px;
}

.mechanism-figure {
  background-color: var(--color-bg-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  box-shadow: var(--shadow-sm);
}

.mechanism-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.figure-caption {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--color-muted);
  text-align: center;
  background-color: var(--color-white);
}

/* 更新流程 */
.process-section {
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 64px 0;
}

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

.process-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 40px;
}

.process-item {
  position: relative;
  padding: 32px 28px;
  background-color: var(--color-bg-light);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.process-number {
  display: block;
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 16px;
  line-height: 1;
}

.process-title {
  font-size: 18px;
  margin-bottom: 10px;
}

.process-desc {
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 0;
}

/* 状态表 */
.status-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 64px 24px 24px;
}

.table-note {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: 16px;
}

/* 版本页 CTA */
.cta-guide-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px 24px 64px;
}

.cta-guide-box {
  background-color: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align: center;
}

.cta-links {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.cta-button-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.cta-button-secondary:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

/* ----------------------------------------------------------
   Pages · 使用指南 guide
   ---------------------------------------------------------- */

/* 接入准备 */
.preparation-section {
  padding: 48px 0 24px;
}

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

.preparation-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.check-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border: 2px solid var(--color-accent);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
}

.check-icon::after {
  content: "";
  width: 10px;
  height: 6px;
  border-left: 2px solid var(--color-accent);
  border-bottom: 2px solid var(--color-accent);
  transform: rotate(-45deg) translateY(-1px);
}

.preparation-title {
  font-size: 16px;
  margin-bottom: 6px;
}

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

/* 操作步骤 */
.steps-section {
  padding: 48px 0 24px;
}

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

.step-card {
  position: relative;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 24px 24px;
  transition: box-shadow var(--transition-base);
}

.step-card:hover {
  box-shadow: var(--shadow-md);
}

.step-card .step-number {
  position: static;
  display: inline-flex;
  margin-bottom: 16px;
}

.step-content h3.step-title {
  font-size: 17px;
  margin-bottom: 8px;
}

.step-content p.step-text {
  font-size: 14px;
  line-height: 1.65;
  margin-bottom: 0;
}

/* 自助排查 */
.troubleshoot-section {
  padding: 48px 0 24px;
}

/* 指南配图 */
.guide-media-section {
  padding: 32px 0;
}

.guide-figure {
  background-color: var(--color-bg-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.guide-image {
  width: 100%;
  height: auto;
  max-height: 480px;
  object-fit: cover;
}

.guide-caption {
  padding: 14px 20px;
  font-size: 14px;
  color: var(--color-muted);
  text-align: center;
  background-color: var(--color-white);
}

/* 指南 CTA */
.guide-cta-section {
  padding: 32px 0 64px;
}

.guide-cta-content {
  background-color: var(--color-primary);
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align: center;
}

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

.guide-cta-text {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 28px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.btn-guide-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 32px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  background-color: var(--color-white);
  border: 1px solid var(--color-white);
  border-radius: var(--radius-md);
  min-height: 44px;
  transition: all var(--transition-base);
}

.btn-guide-cta:hover {
  background-color: transparent;
  color: var(--color-white);
}

/* ----------------------------------------------------------
   Pages · 合作说明 cooperation
   ---------------------------------------------------------- */

/* 适合对象 */
.target-section {
  padding: 48px 0 24px;
}

.target-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.target-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.target-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-title {
  font-size: 18px;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-bg-light);
}

.card-text {
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 0;
}

/* 准备材料 */
.material-section {
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 64px 0;
}

.material-layout {
  display: grid;
  grid-template-columns: 1fr 0.85fr;
  gap: 56px;
  align-items: center;
}

.material-content .section-head {
  margin-bottom: 24px;
}

.material-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.material-item {
  padding: 16px 20px;
  background-color: var(--color-bg-light);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-text);
}

.material-figure {
  background-color: var(--color-bg-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  box-shadow: var(--shadow-sm);
}

.material-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 合作流程 */
.cooperation-section.process-section {
  background-color: var(--color-bg-light);
}

.cooperation-section.process-section .process-steps {
  margin-top: 0;
}

.cooperation-section .process-step {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 48px 24px 24px;
}

/* 反馈方式 */
.feedback-section {
  padding: 64px 0;
}

.feedback-panel {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align: center;
}

.feedback-panel .section-title {
  margin-bottom: 16px;
}

.feedback-text {
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-text);
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 12px;
}

.feedback-text:last-child {
  margin-bottom: 0;
}

/* ----------------------------------------------------------
   Pages · 404
   ---------------------------------------------------------- */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 64px 24px;
}

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

.error-code {
  font-family: var(--font-serif);
  font-size: 96px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 16px;
}

.error-title {
  font-size: 28px;
  margin-bottom: 16px;
}

.error-desc {
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: 32px;
}

.error-actions {
  display: flex;
  justify-content: center;
}

/* ----------------------------------------------------------
   Responsive · 响应式
   ---------------------------------------------------------- */
@media (max-width: 1024px) {
  .service-cards,
  .method-list,
  .principle-grid,
  .service-matrix-grid,
  .process-list,
  .steps-grid,
  .target-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .hero-container,
  .intro-container,
  .mechanism-layout,
  .material-layout {
    gap: 40px;
  }

  .version-summary .container {
    gap: 40px;
  }
}

@media (max-width: 768px) {
  /* 页头与导航 */
  .header-container {
    height: 64px;
    padding: 0 16px;
  }

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

  .brand-tagline {
    font-size: 11px;
  }

  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: static;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    padding: 8px 16px 16px;
    z-index: 99;
  }

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

  .nav-item {
    border-bottom: 1px solid var(--color-bg-light);
  }

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

  .nav-link {
    display: block;
    padding: 14px 8px;
    font-size: 16px;
    min-height: 48px;
    display: flex;
    align-items: center;
  }

  .nav-link::after {
    display: none;
  }

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

  /* 面包屑与页面标题 */
  .breadcrumb {
    padding: 16px 16px 0;
    font-size: 13px;
  }

  .page-header {
    padding: 20px 16px 4px;
  }

  .page-title {
    font-size: 28px;
  }

  .page-title-area,
  .page-title-container {
    padding: 4px 16px 24px;
  }

  .page-subtitle,
  .page-intro,
  .page-lead {
    font-size: 15px;
  }

  /* 首页 */
  .hero-container {
    grid-template-columns: 1fr;
    padding: 40px 16px 48px;
    gap: 32px;
  }

  .hero-title {
    font-size: 30px;
  }

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

  .hero-media {
    aspect-ratio: 16 / 10;
  }

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

  .service-cards {
    grid-template-columns: 1fr;
    gap: 24px;
    margin-bottom: 32px;
  }

  .version-summary {
    padding: 48px 0;
  }

  .version-summary .container {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 0 16px;
  }

  .cooperation-preview {
    padding: 48px 16px 16px;
  }

  .faq-section {
    padding: 48px 16px 16px;
  }

  .cta-section {
    padding: 48px 16px;
    margin-top: 32px;
  }

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

  /* 通用区块 */
  .section-title {
    font-size: 24px;
  }

  .section-header,
  .section-heading,
  .section-head {
    margin-bottom: 28px;
  }

  .container,
  .footer-container,
  .footer-bottom {
    padding-left: 16px;
    padding-right: 16px;
  }

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

  .step-item,
  .process-step {
    padding-top: 44px;
  }

  /* 首页流程条 */
  .cooperation-preview .process-steps {
    grid-template-columns: 1fr;
  }

  /* 关于页 */
  .intro-section {
    padding: 32px 16px 16px;
  }

  .intro-container {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .method-section {
    padding: 48px 0;
  }

  .method-container {
    padding: 0 16px;
  }

  .method-list {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .principles-section {
    padding: 48px 16px 16px;
  }

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

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

  /* 服务页 */
  .service-matrix-section {
    padding: 32px 16px 16px;
  }

  .service-matrix-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .scenarios-section {
    padding: 48px 0;
  }

  .scenarios-section .container {
    padding: 0 16px;
  }

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

  .delivery-section {
    padding: 48px 16px 16px;
  }

  /* 版本页 */
  .mechanism-section {
    padding: 32px 16px 16px;
  }

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

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

  .process-section .container {
    padding: 0 16px;
  }

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

  .status-section {
    padding: 48px 16px 16px;
  }

  .cta-guide-section {
    padding: 16px 16px 48px;
  }

  .cta-guide-box {
    padding: 32px 24px;
  }

  /* 指南页 */
  .preparation-section,
  .steps-section,
  .troubleshoot-section {
    padding: 32px 0 16px;
  }

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

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

  .guide-cta-section {
    padding: 16px 0 48px;
  }

  .guide-cta-content {
    padding: 32px 24px;
  }

  /* 合作页 */
  .target-section {
    padding: 32px 0 16px;
  }

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

  .material-section {
    padding: 48px 0;
  }

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

  .feedback-section {
    padding: 48px 0;
  }

  .feedback-panel {
    padding: 32px 24px;
  }

  /* 404 */
  .error-code {
    font-size: 72px;
  }

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

  /* 页脚 */
  .footer-container {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    padding-top: 40px;
  }

  .related-links {
    padding: 32px 16px 0;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

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

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

  .compare-table th,
  .compare-table td,
  .delivery-table th,
  .delivery-table td,
  .status-table th,
  .status-table td {
    padding: 12px 14px;
    font-size: 14px;
  }

  .faq-question,
  .troubleshoot-question {
    padding: 16px 40px 16px 16px;
    font-size: 15px;
  }

  .faq-answer,
  .troubleshoot-answer {
    padding: 0 16px 16px;
    font-size: 14px;
  }
}