/* ==========================================================================
   51黑料网 全站样式表
   bwkoh.com
   ========================================================================== */

/* --------------------------------------------------------------------------
   Base — 基础变量、重置、字体与通用元素
   -------------------------------------------------------------------------- */

:root {
  --color-bg: #F6F4EE;
  --color-primary: #1E4D44;
  --color-accent: #BC5B3D;
  --color-muted: #6B7A72;
  --color-line: #D7D2C8;
  --color-white: #FFFFFF;
  --color-card-bg: #FFFFFF;
  --color-text: #2B2E2A;
  --color-text-light: #4A4F4A;

  --font-serif: "Noto Serif SC", "Source Han Serif SC", STSong, "Songti SC", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;

  --container-width: 1200px;
  --container-padding: 24px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --transition-speed: 0.2s;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

ul,
ol {
  list-style: none;
}

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

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

p {
  margin-bottom: 0;
}

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

h1 {
  font-size: 32px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 18px;
}

h4 {
  font-size: 16px;
}

strong {
  font-weight: 600;
}

details summary {
  cursor: pointer;
  list-style: none;
}

details summary::-webkit-details-marker {
  display: none;
}

/* --------------------------------------------------------------------------
   Layout — 全站骨架：页头、页脚、主容器、面包屑与页面标题
   -------------------------------------------------------------------------- */

.site-header {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
}

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 16px var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-logo {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.brand-logo:hover {
  color: var(--color-primary);
  opacity: 0.85;
}

.site-nav .nav-list {
  display: flex;
  align-items: center;
  gap: 28px;
}

.site-nav .nav-list a {
  display: block;
  padding: 6px 2px;
  font-size: 15px;
  color: var(--color-text);
  border-bottom: 2px solid transparent;
  line-height: 1.6;
}

.site-nav .nav-list a:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-line);
}

.site-nav .nav-list a.is-current {
  color: var(--color-primary);
  font-weight: 600;
  border-bottom-color: var(--color-primary);
}

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

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

.site-main {
  min-height: calc(100vh - 200px);
}

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

.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding) 64px;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 24px 0 16px;
  font-size: 13px;
  color: var(--color-muted);
}

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

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

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

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

/* 页面标题区 */
.page-header {
  padding: 8px 0 32px;
  border-bottom: 1px solid var(--color-line);
  margin-bottom: 40px;
}

.page-header .page-title {
  font-size: 32px;
  line-height: 1.4;
  margin-bottom: 12px;
}

.page-header .page-description {
  font-size: 15px;
  color: var(--color-muted);
  max-width: 780px;
}

/* 页脚 */
.site-footer {
  border-top: 1px solid var(--color-line);
  background-color: var(--color-bg);
  margin-top: 32px;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 36px var(--container-padding) 20px;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 40px;
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.footer-tagline {
  font-size: 14px;
  color: var(--color-muted);
}

.footer-nav-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
  font-family: var(--font-sans);
}

.footer-nav ul li,
.footer-info ul li {
  margin-bottom: 8px;
}

.footer-nav ul a,
.footer-info ul a {
  font-size: 14px;
  color: var(--color-text-light);
}

.footer-nav ul a:hover,
.footer-info ul a:hover {
  color: var(--color-primary);
}

.footer-note {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: 12px;
  line-height: 1.7;
}

.footer-bottom {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 16px var(--container-padding) 24px;
  border-top: 1px solid var(--color-line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-bottom .copyright {
  font-size: 13px;
  color: var(--color-muted);
}

.footer-bottom .footer-principle {
  font-size: 13px;
  color: var(--color-muted);
  text-align: right;
}

/* 通用区块标题 */
.section-heading {
  margin-bottom: 32px;
}

.section-heading .section-kicker {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.section-heading h2 {
  font-size: 26px;
  margin-bottom: 10px;
}

.section-heading p:not(.section-kicker) {
  color: var(--color-muted);
  max-width: 720px;
  font-size: 15px;
}

.section-title {
  font-size: 26px;
  margin-bottom: 16px;
}

.section-lead {
  color: var(--color-muted);
  max-width: 720px;
  margin-bottom: 24px;
  font-size: 15px;
}

/* 通用按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  line-height: 1.6;
  min-height: 44px;
  transition: background-color var(--transition-speed) ease,
    border-color var(--transition-speed) ease,
    color var(--transition-speed) ease;
}

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

.btn-primary:hover {
  background-color: #a64e33;
  border-color: #a64e33;
  color: var(--color-white);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

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

.btn-outline {
  background-color: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}

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

.btn-back {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 28px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-md);
  font-size: 15px;
  min-height: 44px;
}

.btn-back:hover {
  background-color: #173d36;
  color: var(--color-white);
}

/* 相关链接条 */
.related-links {
  max-width: var(--container-width);
  margin: 48px auto 0;
  padding: 20px var(--container-padding);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 24px;
  border-top: 1px solid var(--color-line);
  font-size: 14px;
}

.related-links-label {
  color: var(--color-muted);
  font-weight: 500;
}

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

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

/* --------------------------------------------------------------------------
   Components — 首页组件
   -------------------------------------------------------------------------- */

/* 首屏工作台 */
.hero-workbench {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px var(--container-padding) 24px;
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: 48px;
  align-items: start;
}

.hero-copy {
  padding-top: 12px;
}

.hero-copy h1 {
  font-size: 34px;
  line-height: 1.4;
  margin-bottom: 20px;
}

.hero-lead {
  font-size: 17px;
  line-height: 1.9;
  color: var(--color-text-light);
  margin-bottom: 12px;
}

.hero-sub {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-muted);
  margin-bottom: 28px;
}

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

.hero-media {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.hero-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.hero-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--color-muted);
  background-color: var(--color-card-bg);
}

.info-fields-sample {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 16px 20px;
}

.sample-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.info-fields-sample ul li {
  display: flex;
  gap: 12px;
  padding: 6px 0;
  border-bottom: 1px solid var(--color-bg);
  font-size: 13px;
  line-height: 1.6;
}

.info-fields-sample ul li:last-child {
  border-bottom: none;
}

.field-label {
  min-width: 64px;
  color: var(--color-muted);
  font-weight: 500;
}

.field-value {
  color: var(--color-text);
}

/* 首屏下方辅助图 */
.content-media {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.content-media-primary {
  margin-bottom: 8px;
}

.content-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 21 / 9;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.content-media figcaption {
  font-size: 13px;
  color: var(--color-muted);
  padding: 8px 4px 0;
}

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

.service-matrix-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.service-card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 28px 28px 24px;
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition-speed) ease,
    border-color var(--transition-speed) ease;
}

.service-card:hover {
  box-shadow: 0 4px 16px rgba(30, 77, 68, 0.08);
  border-color: var(--color-primary);
}

.service-card-featured {
  grid-column: span 2;
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.service-card-featured .card-number {
  color: rgba(255, 255, 255, 0.6);
}

.service-card-featured h3 {
  color: var(--color-white);
  font-size: 22px;
}

.service-card-featured p {
  color: rgba(255, 255, 255, 0.85);
}

.service-card-featured .card-link {
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.5);
}

.service-card-featured .card-link:hover {
  background-color: var(--color-white);
  color: var(--color-primary);
}

.card-number {
  font-family: var(--font-serif);
  font-size: 13px;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 10px;
}

.service-card h3 {
  font-size: 19px;
  margin-bottom: 10px;
}

.service-card p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.75;
  margin-bottom: 8px;
  flex-grow: 1;
}

.card-link {
  display: inline-block;
  margin-top: 12px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  padding-bottom: 2px;
  border-bottom: 1px solid var(--color-primary);
  align-self: flex-start;
}

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

/* 合作流程摘要 */
.process-summary-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px var(--container-padding) 24px;
}

.process-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.process-step {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 20px 18px;
}

.process-step .step-number {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent);
  background-color: rgba(188, 91, 61, 0.1);
  padding: 2px 10px;
  border-radius: 999px;
  margin-bottom: 12px;
}

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

.process-step p {
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.7;
}

.process-more {
  margin-top: 24px;
  text-align: right;
  font-size: 14px;
}

.process-more a {
  font-weight: 500;
}

/* 自助指南入口 */
.guide-entry-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px var(--container-padding);
}

.guide-entry-card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 36px 40px;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 32px;
  align-items: center;
}

.guide-entry-card h2 {
  font-size: 22px;
  margin-bottom: 0;
}

.guide-entry-card > p {
  grid-column: 1;
  color: var(--color-muted);
  font-size: 14px;
  margin-top: 8px;
}

.guide-entry-links {
  grid-column: 2;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.entry-link {
  display: block;
  padding: 10px 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: border-color var(--transition-speed) ease,
    background-color var(--transition-speed) ease;
}

.entry-link:hover {
  border-color: var(--color-primary);
  background-color: rgba(30, 77, 68, 0.04);
}

.guide-entry-card .btn-outline {
  grid-column: 1;
  justify-self: start;
  margin-top: 4px;
}

/* FAQ 预览 */
.faq-preview-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px var(--container-padding) 24px;
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 48px;
  align-items: start;
}

.faq-preview-copy .section-kicker {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.faq-preview-copy h2 {
  font-size: 26px;
  margin-bottom: 24px;
}

.faq-preview-copy .faq-item {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  padding: 0;
  margin-bottom: 12px;
}

.faq-preview-copy .faq-item summary {
  padding: 14px 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.faq-preview-copy .faq-item summary::after {
  content: "+";
  font-size: 18px;
  color: var(--color-accent);
  flex-shrink: 0;
}

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

.faq-preview-copy .faq-item p {
  padding: 0 18px 14px;
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.75;
}

.faq-preview-aside {
  background-color: var(--color-primary);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
}

.faq-preview-aside h3 {
  color: var(--color-white);
  font-size: 20px;
  margin-bottom: 12px;
}

.faq-preview-aside p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 20px;
}

.faq-preview-aside .btn-primary {
  background-color: var(--color-white);
  color: var(--color-primary);
  border-color: var(--color-white);
}

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

/* 边界提示条 */
.boundary-banner {
  max-width: var(--container-width);
  margin: 24px auto;
  padding: 16px var(--container-padding);
  background-color: var(--color-primary);
  border-radius: var(--radius-md);
}

.boundary-banner p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 14px;
  text-align: center;
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   Components — 内页通用组件
   -------------------------------------------------------------------------- */

/* 内页双栏布局 */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 48px;
  align-items: start;
}

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

/* 服务项目页 */
.service-section {
  padding: 32px 0;
  border-bottom: 1px solid var(--color-line);
}

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

.service-section > p {
  color: var(--color-text-light);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 20px;
}

.service-output {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 16px;
}

.service-output h3 {
  font-size: 16px;
  margin-bottom: 12px;
  color: var(--color-primary);
}

.service-output ul li {
  padding: 6px 0;
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  position: relative;
  padding-left: 18px;
}

.service-output ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

.service-scope {
  font-size: 14px;
  color: var(--color-muted);
}

.service-scope strong {
  color: var(--color-primary);
}

/* 服务边界区 */
.boundary-section {
  padding: 32px 0;
}

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

.boundary-section > p {
  color: var(--color-text-light);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 20px;
}

.boundary-list {
  background-color: rgba(188, 91, 61, 0.06);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 20px 24px;
}

.boundary-list li {
  padding: 6px 0;
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
}

.boundary-section > p:last-of-type {
  margin-top: 16px;
  font-size: 14px;
}

/* 服务页配图 */
.service-media {
  margin-top: 24px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-line);
}

.service-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

.service-media figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--color-muted);
  background-color: var(--color-card-bg);
}

/* 服务侧栏 */
.service-aside {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  position: sticky;
  top: 24px;
}

.aside-nav h2 {
  font-size: 17px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-line);
}

.aside-nav ul li {
  margin-bottom: 4px;
}

.aside-nav ul a {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  color: var(--color-text);
  border-left: 2px solid transparent;
}

.aside-nav ul a:hover {
  color: var(--color-primary);
  border-left-color: var(--color-primary);
  background-color: rgba(30, 77, 68, 0.04);
}

.aside-tip {
  margin-top: 24px;
  border-top: 1px solid var(--color-line);
  padding-top: 20px;
}

.aside-tip h2 {
  font-size: 16px;
  color: var(--color-accent);
  margin-bottom: 10px;
}

.aside-tip p {
  font-size: 13px;
  color: var(--color-muted);
  margin-bottom: 12px;
  line-height: 1.7;
}

.aside-tip ul {
  margin-bottom: 16px;
}

.aside-tip ul li {
  font-size: 13px;
  color: var(--color-text-light);
  padding: 4px 0;
  line-height: 1.6;
  padding-left: 16px;
  position: relative;
}

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

.aside-tip .btn {
  display: block;
  width: 100%;
  margin-bottom: 8px;
  font-size: 14px;
  padding: 8px 16px;
}

/* 服务适用场景 */
.service-scenarios {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px var(--container-padding) 0;
}

.service-scenarios h2 {
  font-size: 24px;
  margin-bottom: 12px;
}

.service-scenarios > p {
  color: var(--color-muted);
  margin-bottom: 24px;
  max-width: 720px;
}

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

.scenario-list li {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

.scenario-list li strong {
  display: block;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.service-scenarios > p:last-of-type {
  margin-top: 20px;
  font-size: 14px;
}

.service-scenarios > p:last-of-type a {
  margin-right: 16px;
  font-weight: 500;
}

/* 合作流程页 */
.process-photo-section {
  margin-bottom: 40px;
}

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

.process-photo-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 6;
  object-fit: cover;
}

.process-photo-figure figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--color-muted);
  background-color: var(--color-card-bg);
}

.process-timeline-section {
  padding: 32px 0;
}

.timeline-list {
  position: relative;
}

.timeline-list::before {
  content: "";
  position: absolute;
  left: 22px;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--color-line);
}

.timeline-item {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 20px;
  margin-bottom: 36px;
  position: relative;
}

.timeline-marker {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.timeline-marker .stage-number {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}

.timeline-marker h3 {
  font-size: 18px;
  margin-top: 10px;
  white-space: nowrap;
}

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

.stage-detail {
  margin-bottom: 12px;
}

.stage-detail h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 6px;
  font-family: var(--font-sans);
}

.stage-detail ul {
  padding-left: 0;
}

.stage-detail ul li {
  font-size: 14px;
  color: var(--color-text-light);
  padding: 3px 0;
  line-height: 1.7;
  padding-left: 16px;
  position: relative;
}

.stage-detail ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 13px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

.stage-adjust {
  font-size: 13px;
  color: var(--color-muted);
  background-color: var(--color-bg);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  line-height: 1.6;
}

/* 准备区 */
.preparation-section {
  padding: 32px 0;
}

.preparation-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.preparation-col {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
}

.preparation-col h3 {
  font-size: 18px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-line);
}

.preparation-col ul li {
  font-size: 14px;
  color: var(--color-text-light);
  padding: 6px 0;
  line-height: 1.7;
  padding-left: 20px;
  position: relative;
}

.preparation-col ul li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

.site-col {
  background-color: rgba(30, 77, 68, 0.04);
}

/* 反馈区 */
.feedback-section {
  padding: 32px 0;
}

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

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

.feedback-item h3 {
  font-size: 16px;
  margin-bottom: 10px;
}

.feedback-item p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.75;
}

.boundary-note {
  margin-top: 24px;
  background-color: rgba(188, 91, 61, 0.06);
  border-left: 3px solid var(--color-accent);
  padding: 16px 20px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.boundary-note p {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.75;
}

/* 流程页相关导航 */
.related-links h2 {
  font-size: 16px;
  margin-bottom: 12px;
}

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

.related-links ul a {
  font-size: 14px;
  color: var(--color-text-light);
}

.related-links ul a:hover {
  color: var(--color-primary);
}

/* 应对指南页 */
.guide-lead-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-line);
  margin-bottom: 32px;
}

.guide-lead-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 6;
  object-fit: cover;
}

.guide-lead-figure figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--color-muted);
  background-color: var(--color-card-bg);
}

.guide-section {
  padding: 24px 0;
}

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

.guide-section .section-lead {
  font-size: 15px;
  color: var(--color-muted);
  margin-bottom: 24px;
}

.guide-steps-list {
  counter-reset: guide-step;
}

.guide-step-item {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-line);
}

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

.guide-step-item .step-number {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.guide-step-item .step-content p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.75;
  margin-bottom: 6px;
}

/* 误区区 */
.mistake-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 20px;
}

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

.mistake-item h3 {
  font-size: 15px;
  color: var(--color-accent);
  margin-bottom: 6px;
}

.mistake-item p {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* 指南内导航 */
.guide-inline-nav {
  margin-top: 24px;
  padding: 16px 20px;
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  font-size: 14px;
}

.guide-inline-nav p {
  color: var(--color-text-light);
}

.guide-inline-nav a {
  margin-right: 16px;
  font-weight: 500;
}

/* 指南侧栏 */
.guide-aside {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.aside-block {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 24px 22px;
}

.aside-block h2 {
  font-size: 17px;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-line);
}

.aside-block > p {
  font-size: 13px;
  color: var(--color-muted);
  margin-bottom: 14px;
  line-height: 1.7;
}

.evidence-field-list li {
  font-size: 13px;
  color: var(--color-text-light);
  padding: 6px 0;
  border-bottom: 1px solid var(--color-bg);
  line-height: 1.6;
  display: flex;
  gap: 8px;
}

.evidence-field-list li::before {
  content: "□";
  color: var(--color-primary);
  flex-shrink: 0;
}

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

.aside-tip {
  font-size: 13px;
  color: var(--color-muted);
  background-color: var(--color-bg);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  margin-top: 8px;
  line-height: 1.7;
}

.aside-note {
  background-color: rgba(30, 77, 68, 0.04);
}

.aside-note h2 {
  border-bottom-color: var(--color-line);
}

.aside-note p {
  margin-bottom: 8px;
}

.aside-note a {
  font-size: 14px;
  font-weight: 500;
}

/* FAQ 页 */
.faq-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
  align-items: start;
}

.faq-main .section-title {
  font-size: 22px;
  margin-bottom: 20px;
}

.faq-accordion .faq-item {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
}

.faq-accordion .faq-item summary {
  padding: 18px 22px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  transition: background-color var(--transition-speed) ease;
}

.faq-accordion .faq-item summary:hover {
  background-color: rgba(30, 77, 68, 0.04);
}

.faq-accordion .faq-item summary::after {
  content: "+";
  font-size: 20px;
  color: var(--color-accent);
  flex-shrink: 0;
}

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

.faq-answer {
  padding: 0 22px 20px;
  border-top: 1px solid var(--color-bg);
}

.faq-answer p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.8;
  padding-top: 14px;
}

.faq-note {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-top: 24px;
}

.faq-note h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.faq-note p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.75;
}

.faq-aside {
  position: sticky;
  top: 24px;
}

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

.faq-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.faq-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--color-muted);
  background-color: var(--color-card-bg);
}

/* FAQ 底部导航 */
.faq-next-nav {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px var(--container-padding) 0;
  border-top: 1px solid var(--color-line);
}

.next-nav-inner .section-title {
  font-size: 22px;
  margin-bottom: 24px;
}

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

.next-nav-card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 24px 22px;
}

.next-nav-card h3 {
  font-size: 17px;
  margin-bottom: 10px;
}

.next-nav-card p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.75;
  margin-bottom: 14px;
}

.text-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-primary);
  padding-bottom: 2px;
}

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

/* 关于页 */
.principle-intro {
  padding: 24px 0;
}

.principle-intro .section-title {
  font-size: 24px;
}

.principle-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.principle-card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
}

.principle-card h3 {
  font-size: 18px;
  margin-bottom: 10px;
  color: var(--color-primary);
}

.principle-card p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.75;
}

.principle-figure {
  margin-top: 24px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-line);
}

.principle-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 6;
  object-fit: cover;
}

.principle-figure figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--color-muted);
  background-color: var(--color-card-bg);
}

.info-handling-detail {
  padding: 24px 0;
}

.info-handling-detail .section-title {
  font-size: 24px;
}

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

.method-step {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 24px 22px;
}

.method-step .step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 14px;
}

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

.method-step p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.75;
}

.method-note {
  margin-top: 20px;
  font-size: 14px;
  color: var(--color-muted);
}

.method-note a {
  margin-right: 16px;
  font-weight: 500;
}

.partnership-expectation {
  padding: 24px 0;
}

.partnership-expectation .section-title {
  font-size: 24px;
}

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

.expectation-item {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 24px 22px;
}

.expectation-item h3 {
  font-size: 17px;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.expectation-item p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.75;
}

.expectation-more {
  margin-top: 16px;
  font-size: 14px;
}

.expectation-more a {
  margin-right: 16px;
  font-weight: 500;
}

.boundary-note {
  padding: 24px 0;
}

.boundary-card {
  background-color: rgba(188, 91, 61, 0.06);
  border: 1px solid rgba(188, 91, 61, 0.2);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
}

.boundary-card p {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.8;
  margin-bottom: 8px;
}

.boundary-card p:last-child {
  margin-bottom: 0;
}

/* 404 页 */
.error-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 80px var(--container-padding) 40px;
  text-align: center;
}

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

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

.error-desc {
  font-size: 15px;
  color: var(--color-muted);
  max-width: 480px;
  margin: 0 auto 24px;
}

.error-links {
  margin-top: 24px;
}

.error-links p {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 16px;
}

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

.error-links ul a {
  font-size: 15px;
  font-weight: 500;
}

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

/* 平板：≤ 1024px */
@media (max-width: 1024px) {
  .hero-workbench {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .page-layout {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 32px;
  }

  .faq-layout {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 32px;
  }

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

  .footer-brand {
    grid-column: span 2;
  }
}

/* 手机：≤ 768px */
@media (max-width: 768px) {
  .header-inner {
    flex-wrap: wrap;
    padding: 12px var(--container-padding);
  }

  .nav-toggle {
    display: flex;
    order: 3;
    margin-left: auto;
  }

  .site-nav {
    order: 4;
    width: 100%;
  }

  .site-nav .nav-list {
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 12px 0;
    border-top: 1px solid var(--color-line);
    margin-top: 8px;
  }

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

  .site-nav .nav-list li {
    width: 100%;
  }

  .site-nav .nav-list a {
    padding: 12px 0;
    font-size: 16px;
    min-height: 44px;
    display: flex;
    align-items: center;
    border-bottom: none;
    border-bottom: 1px solid var(--color-bg);
  }

  .site-nav .nav-list a.is-current {
    border-bottom-color: var(--color-bg);
  }

  .hero-workbench {
    grid-template-columns: 1fr;
    padding-top: 32px;
    gap: 24px;
  }

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

  .hero-media {
    order: 2;
  }

  .content-media-primary {
    margin-bottom: 4px;
  }

  .content-media img {
    aspect-ratio: 16 / 9;
  }

  .service-matrix-section {
    padding-top: 32px;
  }

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

  .service-card-featured {
    grid-column: span 1;
  }

  .process-strip {
    grid-template-columns: 1fr 1fr;
  }

  .guide-entry-card {
    grid-template-columns: 1fr;
    padding: 28px 24px;
    gap: 20px;
  }

  .guide-entry-links {
    grid-column: 1;
  }

  .guide-entry-card .btn-outline {
    grid-column: 1;
  }

  .faq-preview-section {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

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

  .service-aside,
  .guide-aside {
    position: static;
  }

  .faq-layout {
    grid-template-columns: 1fr;
  }

  .faq-aside {
    position: static;
  }

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

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

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

  .timeline-item {
    grid-template-columns: 36px 1fr;
    gap: 16px;
  }

  .timeline-marker .stage-number {
    width: 36px;
    height: 36px;
    font-size: 14px;
  }

  .timeline-list::before {
    left: 18px;
  }

  .timeline-marker h3 {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    margin-top: 8px;
    font-size: 14px;
    white-space: nowrap;
  }

  .guide-step-item {
    grid-template-columns: 36px 1fr;
    gap: 16px;
  }

  .guide-step-item .step-number {
    width: 36px;
    height: 36px;
    font-size: 14px;
  }

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

  .next-nav-grid {
    grid-template-columns: 1fr;
  }

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

  .method-steps {
    grid-template-columns: 1fr;
  }

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

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

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .footer-bottom .footer-principle {
    text-align: center;
  }

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

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

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

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

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

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

  .boundary-banner p {
    text-align: left;
  }
}

/* 小屏手机：≤ 480px */
@media (max-width: 480px) {
  :root {
    --container-padding: 16px;
  }

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

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

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

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

  .process-strip {
    grid-template-columns: 1fr;
  }

  .service-card {
    padding: 20px 18px;
  }

  .timeline-item {
    grid-template-columns: 32px 1fr;
    gap: 12px;
  }

  .timeline-marker .stage-number {
    width: 32px;
    height: 32px;
    font-size: 13px;
  }

  .timeline-list::before {
    left: 16px;
  }

  .timeline-content {
    padding: 16px;
  }

  .stage-detail ul li,
  .stage-adjust {
    font-size: 13px;
  }

  .guide-step-item {
    grid-template-columns: 32px 1fr;
    gap: 12px;
  }

  .guide-step-item .step-number {
    width: 32px;
    height: 32px;
    font-size: 13px;
  }

  .guide-step-item .step-content h3 {
    font-size: 16px;
  }

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

  .faq-answer {
    padding: 0 16px 16px;
  }

  .service-output {
    padding: 16px;
  }

  .boundary-list {
    padding: 16px;
  }

  .preparation-col {
    padding: 20px 16px;
  }

  .feedback-item {
    padding: 16px;
  }

  .next-nav-card {
    padding: 20px 16px;
  }

  .principle-card {
    padding: 20px 16px;
  }

  .method-step,
  .expectation-item {
    padding: 20px 16px;
  }

  .boundary-card {
    padding: 20px 16px;
  }

  .aside-block {
    padding: 20px 16px;
  }

  .service-aside {
    padding: 20px 16px;
  }

  .guide-entry-card {
    padding: 24px 16px;
  }

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

  .error-block h1 {
    font-size: 24px;
  }
}

/* --------------------------------------------------------------------------
   Accessibility — 无障碍与动效偏好
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

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

/* 触摸目标保证 */
@media (pointer: coarse) {
  .site-nav .nav-list a {
    min-height: 44px;
  }

  .faq-accordion .faq-item summary,
  .faq-preview-copy .faq-item summary {
    min-height: 44px;
  }
}