/* ============================================================
   17吃瓜网 全站样式
   配色：深蓝灰 #1F2A37 / 暖黄 #E8A33D / 浅灰 #F5F6F8
   字体：系统中文字体栈，正文 16px/1.8
   ============================================================ */

/* ============================================================
   base — 基础重置与全局变量
   ============================================================ */
:root {
  --color-primary: #1F2A37;
  --color-accent: #E8A33D;
  --color-bg: #F5F6F8;
  --color-card: #FFFFFF;
  --color-text: #22303C;
  --color-line: #D8DEE4;
  --color-text-light: #5A6B7A;
  --color-primary-soft: #2B3A4A;
  --color-accent-dark: #C9892A;
  --radius-sm: 4px;
  --radius-md: 8px;
  --container-width: 1140px;
  --header-height: 68px;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}

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

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-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-primary);
}

h1 {
  font-size: 32px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 20px;
}

p {
  margin-bottom: 0;
}

/* ============================================================
   layout — 全站容器与骨架
   ============================================================ */
.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-main {
  flex: 1 0 auto;
}

/* 首页主容器 */
.home-main .hero-inner,
.home-main .intro-updates-inner,
.home-main .service-matrix-section,
.home-main .method-steps-section,
.home-main .scenario-compare-section,
.home-main .faq-preview-section,
.home-main .process-timeline-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* 内页主容器 */
.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 64px;
}

/* ============================================================
   components — 通用组件
   ============================================================ */

/* --- 按钮 --- */
.btn {
  display: inline-block;
  padding: 12px 28px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease;
}

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

.btn-primary:hover {
  background-color: var(--color-accent-dark);
  color: #fff;
}

/* --- 文本链接 --- */
.text-link {
  display: inline-block;
  font-weight: 600;
  color: var(--color-accent);
  margin-top: 12px;
}

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

.text-link::after {
  content: " →";
}

/* --- 区块标题 --- */
.section-head {
  text-align: center;
  margin-bottom: 40px;
}

.section-head h2 {
  font-size: 28px;
  margin-bottom: 8px;
}

.section-head p {
  color: var(--color-text-light);
  max-width: 640px;
  margin: 0 auto;
}

/* --- 区块通用链接 --- */
.section-link {
  display: inline-block;
  margin-top: 32px;
  font-weight: 600;
  color: var(--color-accent);
  border-bottom: 1px solid transparent;
}

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

/* --- 面包屑 --- */
.breadcrumb {
  padding: 20px 0 12px;
  font-size: 14px;
  color: var(--color-text-light);
}

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

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

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

.breadcrumb-current {
  color: var(--color-primary);
  font-weight: 600;
}

/* --- 页面标题区 --- */
.page-header {
  padding: 8px 0 16px;
  border-bottom: 1px solid var(--color-line);
  margin-bottom: 24px;
}

.page-title {
  font-size: 32px;
  font-weight: 600;
  color: var(--color-primary);
}

/* --- 页面摘要区 --- */
.page-head {
  margin-bottom: 48px;
}

.page-head p {
  max-width: 820px;
  color: var(--color-text-light);
  font-size: 17px;
}

.page-summary {
  max-width: 820px;
  color: var(--color-text-light);
  font-size: 17px;
}

.page-head-summary {
  max-width: 820px;
  color: var(--color-text-light);
  font-size: 17px;
}

/* --- 图片容器 --- */
.content-media {
  margin: 0;
}

.content-media img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

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

.content-media-primary {
  margin: 32px auto 0;
  max-width: 720px;
}

.content-media-inline {
  margin-top: 24px;
  max-width: 720px;
}

/* --- 相关链接导航 --- */
.related-links {
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--color-line);
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.related-links-label {
  font-weight: 600;
  color: var(--color-primary);
  margin-right: 8px;
}

.related-links-item {
  padding: 6px 16px;
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--color-text);
}

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

/* --- 卡片链接 --- */
.link-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 24px;
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.link-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 16px rgba(31, 42, 55, 0.08);
}

.link-card-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-primary);
}

.link-card-desc {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* ============================================================
   components — 页头导航
   ============================================================ */
.site-header {
  background-color: var(--color-primary);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
}

.header-inner {
  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: 24px;
}

.logo {
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex-shrink: 0;
}

.logo-text {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0;
}

.logo:hover .logo-text {
  color: var(--color-accent);
}

.logo-tag {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
  background: rgba(255, 255, 255, 0.12);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.site-nav {
  display: flex;
  align-items: center;
}

.site-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav ul li {
  position: relative;
}

.nav-link {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.85);
  border-radius: var(--radius-sm);
  transition: color 0.2s ease, background-color 0.2s ease;
}

.nav-link:hover {
  color: #fff;
  background-color: rgba(255, 255, 255, 0.1);
}

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

.has-submenu .submenu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 160px;
  background: var(--color-primary-soft);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  padding: 8px 0;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
  z-index: 101;
}

.has-submenu:hover .submenu {
  display: block;
}

.has-submenu .submenu li {
  width: 100%;
}

.has-submenu .submenu a {
  display: block;
  padding: 8px 20px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.85);
  white-space: nowrap;
}

.has-submenu .submenu a:hover {
  color: var(--color-accent);
  background-color: rgba(255, 255, 255, 0.06);
}

/* ============================================================
   components — 页脚
   ============================================================ */
.site-footer {
  background-color: var(--color-primary);
  color: rgba(255, 255, 255, 0.8);
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-logo {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
}

.footer-slogan {
  font-size: 15px;
  color: var(--color-accent);
  font-weight: 600;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
}

.footer-heading {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 8px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-col ul a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  transition: color 0.2s ease;
}

.footer-col ul a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  padding: 16px 24px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.45);
}

/* ============================================================
   components — 首页各模块
   ============================================================ */

/* --- 首屏 hero --- */
.hero-section {
  background-color: var(--color-primary);
  color: #fff;
  padding: 64px 0 56px;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-copy h1 {
  color: #fff;
  font-size: 36px;
  line-height: 1.3;
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 17px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 32px;
  max-width: 540px;
}

.hero-media {
  margin: 0;
}

.hero-media img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  border-radius: var(--radius-md);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

/* --- 身份选择比较器 --- */
.identity-selector {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: 20px;
}

.selector-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 12px;
}

.selector-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.selector-tab {
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 600;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-sm);
  color: rgba(255, 255, 255, 0.8);
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.selector-tab:hover {
  border-color: var(--color-accent);
  color: #fff;
}

.selector-tab.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

.identity-panel {
  display: none;
}

.identity-panel.active {
  display: block;
}

.identity-panel ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.identity-panel ul li {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.8);
  padding-left: 20px;
  position: relative;
}

.identity-panel ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 50%;
}

/* --- 简介与最近更新 --- */
.intro-updates-section {
  padding: 64px 0 48px;
}

.intro-updates-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
}

.intro-col h2,
.updates-col h2 {
  font-size: 24px;
  margin-bottom: 16px;
}

.intro-col p {
  color: var(--color-text-light);
  margin-bottom: 12px;
}

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

.update-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 8px;
}

.update-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-line);
}

.update-list li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.update-cat {
  flex-shrink: 0;
  font-size: 12px;
  padding: 2px 10px;
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  color: var(--color-text-light);
}

.update-list a {
  font-size: 15px;
  color: var(--color-text);
}

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

/* --- 三段式服务矩阵 --- */
.service-matrix-section {
  padding: 32px 0 64px;
}

.stage-block {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-bottom: 24px;
}

.stage-head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.stage-head h3 {
  font-size: 22px;
}

.stage-goal {
  color: var(--color-text-light);
  font-size: 14px;
}

/* 第一阶段：单列列表 */
.stage-research .service-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.stage-research .service-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
}

.stage-research .service-list li a {
  font-weight: 600;
}

.stage-research .service-list li span {
  font-size: 14px;
  color: var(--color-text-light);
}

/* 第二阶段：两列 */
.stage-create .service-grid-two {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.stage-create .service-item {
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  padding: 20px;
}

.stage-create .service-item a {
  font-weight: 600;
  display: block;
  margin-bottom: 6px;
}

.stage-create .service-item p {
  font-size: 14px;
  color: var(--color-text-light);
}

/* 第三阶段：三列 */
.stage-support .service-grid-three {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
}

.stage-support .service-item {
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  padding: 20px;
}

.stage-support .service-item a {
  font-weight: 600;
  display: block;
  margin-bottom: 6px;
}

.stage-support .service-item p {
  font-size: 14px;
  color: var(--color-text-light);
}

.stage-link {
  display: inline-block;
  margin-top: 20px;
  font-weight: 600;
  color: var(--color-accent);
  font-size: 15px;
}

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

/* --- 工作法四步长条 --- */
.method-steps-section {
  padding: 56px 0 64px;
  background: var(--color-card);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.method-steps-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  gap: 16px;
  align-items: center;
}

.method-step {
  text-align: center;
  padding: 24px 16px;
  background: var(--color-bg);
  border-radius: var(--radius-md);
}

.step-num {
  display: inline-block;
  width: 36px;
  height: 36px;
  line-height: 36px;
  text-align: center;
  background: var(--color-primary);
  color: var(--color-accent);
  border-radius: 50%;
  font-weight: 700;
  font-size: 16px;
  margin-bottom: 12px;
}

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

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

.step-arrow {
  font-size: 22px;
  color: var(--color-accent);
  text-align: center;
}

.step-arrow::before {
  content: "→";
}

/* --- 场景对比块 --- */
.scenario-compare-section {
  padding: 64px 0;
}

.scenario-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 32px;
  align-items: start;
}

.scenario-tabs {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.scenario-tab {
  padding: 14px 20px;
  text-align: left;
  font-size: 15px;
  font-weight: 600;
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.scenario-tab:hover {
  border-color: var(--color-accent);
}

.scenario-tab.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.scenario-panel {
  display: none;
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 32px;
}

.scenario-panel.active {
  display: block;
}

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

.compare-row {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-line);
}

.compare-row:last-child {
  border-bottom: none;
}

.compare-row dt {
  font-weight: 600;
  color: var(--color-primary);
}

.compare-row dd {
  color: var(--color-text-light);
}

/* --- FAQ 摘要 --- */
.faq-preview-section {
  padding: 32px 0 64px;
}

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

.faq-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 24px;
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.faq-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 16px rgba(31, 42, 55, 0.08);
}

.faq-card h3 {
  font-size: 17px;
}

.faq-card p {
  font-size: 14px;
  color: var(--color-text-light);
}

/* --- 合作流程时间线 --- */
.process-timeline-section {
  padding: 32px 0 64px;
}

.timeline-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.timeline-item {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  text-align: center;
}

.timeline-num {
  display: inline-block;
  width: 32px;
  height: 32px;
  line-height: 32px;
  text-align: center;
  background: var(--color-accent);
  color: #fff;
  border-radius: 50%;
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 12px;
}

.timeline-item h3 {
  font-size: 17px;
  margin-bottom: 6px;
}

.timeline-item p {
  font-size: 13px;
  color: var(--color-text-light);
}

/* ============================================================
   pages — 服务项目页
   ============================================================ */
.page-services .stage-nav {
  margin-bottom: 40px;
}

.stage-nav ul {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-line);
}

.stage-nav ul li a {
  display: inline-block;
  padding: 8px 20px;
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
}

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

.stage-section {
  margin-bottom: 56px;
  scroll-margin-top: calc(var(--header-height) + 20px);
}

.stage-heading {
  margin-bottom: 28px;
}

.stage-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  background: rgba(232, 163, 61, 0.1);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
}

.stage-heading h2 {
  font-size: 28px;
  margin-bottom: 8px;
}

.stage-intro {
  color: var(--color-text-light);
  max-width: 720px;
}

.stage-layout {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 32px;
  align-items: start;
}

.stage-image {
  margin: 0;
}

.stage-image figure {
  margin: 0;
}

.stage-image img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.stage-image figcaption {
  font-size: 13px;
  color: var(--color-text-light);
  padding: 8px 4px 0;
  text-align: center;
}

.stage-services {
  display: grid;
  gap: 16px;
}

/* 前期研判：单列 */
.stage-research .stage-services {
  grid-template-columns: 1fr;
}

/* 内容制作：两列 */
.stage-create .stage-services {
  grid-template-columns: 1fr 1fr;
}

/* 传播支持：三列 */
.stage-support .stage-services {
  grid-template-columns: 1fr 1fr 1fr;
}

.stage-services .service-item {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 24px;
}

.stage-services .service-item h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.service-target {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 12px;
}

.service-meta {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
}

.service-meta div {
  display: flex;
  gap: 8px;
  font-size: 13px;
}

.service-meta dt {
  font-weight: 600;
  color: var(--color-primary);
  flex-shrink: 0;
}

.service-meta dd {
  color: var(--color-text-light);
}

.service-output {
  font-size: 14px;
  color: var(--color-text);
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
}

/* --- 工作法引导横幅 --- */
.method-banner {
  background: var(--color-primary);
  border-radius: var(--radius-md);
  padding: 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.banner-content h2 {
  color: #fff;
  font-size: 24px;
  margin-bottom: 8px;
}

.banner-content p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 15px;
}

.banner-link {
  display: inline-block;
  padding: 12px 28px;
  background: var(--color-accent);
  color: #fff;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background-color 0.2s ease;
  white-space: nowrap;
}

.banner-link:hover {
  background: var(--color-accent-dark);
  color: #fff;
}

/* ============================================================
   pages — 热点工作法页
   ============================================================ */
.page-method .steps-overview {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 56px;
}

.step-overview-item {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
}

.step-number {
  display: inline-block;
  width: 36px;
  height: 36px;
  line-height: 36px;
  text-align: center;
  background: var(--color-primary);
  color: var(--color-accent);
  border-radius: 50%;
  font-weight: 700;
  font-size: 16px;
  margin-bottom: 12px;
}

.step-overview-item h2 {
  font-size: 18px;
  margin-bottom: 6px;
}

.step-overview-item p {
  font-size: 14px;
  color: var(--color-text-light);
}

/* 方法详解段落 */
.method-detail {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 40px;
  align-items: center;
  margin-bottom: 56px;
}

.method-detail-reverse {
  grid-template-columns: 380px 1fr;
}

.method-detail-reverse .method-text {
  order: 2;
}

.method-detail-reverse .method-figure {
  order: 1;
}

.method-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  background: rgba(232, 163, 61, 0.1);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
}

.method-text h2 {
  font-size: 26px;
  margin-bottom: 12px;
}

.method-text > p {
  color: var(--color-text-light);
  margin-bottom: 16px;
}

.method-text h3 {
  font-size: 17px;
  margin: 16px 0 6px;
}

.method-text h3 + p {
  color: var(--color-text-light);
  font-size: 15px;
  margin-bottom: 8px;
}

.method-figure {
  margin: 0;
}

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

/* 工作原则清单 */
.principles-section {
  margin-bottom: 48px;
}

.principles-section > h2 {
  font-size: 26px;
  margin-bottom: 24px;
}

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

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

.principle-card h3 {
  font-size: 18px;
  margin-bottom: 6px;
  color: var(--color-primary);
}

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

/* ============================================================
   pages — 合作流程页
   ============================================================ */
.page-approach .process-timeline {
  margin-bottom: 48px;
}

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

.timeline-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.timeline-list .timeline-item {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 20px;
  padding: 24px 0;
  border: none;
  border-left: 2px solid var(--color-line);
  border-radius: 0;
  text-align: left;
  position: relative;
  padding-left: 32px;
}

.timeline-list .timeline-item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 32px;
  width: 12px;
  height: 12px;
  background: var(--color-accent);
  border-radius: 50%;
}

.timeline-list .step-number {
  width: 44px;
  height: 44px;
  line-height: 44px;
  font-size: 18px;
  margin: 0;
}

.timeline-list .step-content h3 {
  font-size: 20px;
  margin-bottom: 4px;
}

.step-owner {
  font-size: 14px;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 4px;
}

.step-output {
  font-size: 14px;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: 8px;
}

.step-content p {
  font-size: 15px;
  color: var(--color-text-light);
}

/* 客户配合表 */
.cooperation-table-section {
  margin-bottom: 56px;
}

.table-wrap {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 24px;
  overflow-x: auto;
}

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

.cooperation-table th {
  background: var(--color-primary);
  color: #fff;
  text-align: left;
  padding: 12px 16px;
  font-weight: 600;
}

.cooperation-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-line);
  vertical-align: top;
}

.cooperation-table tr:last-child td {
  border-bottom: none;
}

.cooperation-table tbody tr:hover {
  background: var(--color-bg);
}

/* 下一步入口 */
.start-link .link-group {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

/* ============================================================
   pages — 近期更新页
   ============================================================ */
.page-updates .update-list {
  margin-bottom: 40px;
}

.update-card {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 24px;
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 16px;
  transition: border-color 0.2s ease;
}

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

.update-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.update-type {
  display: inline-block;
  width: fit-content;
  font-size: 13px;
  font-weight: 600;
  padding: 4px 12px;
  background: rgba(232, 163, 61, 0.12);
  color: var(--color-accent);
  border-radius: var(--radius-sm);
}

.update-status {
  font-size: 13px;
  color: var(--color-text-light);
}

.update-content h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.update-content h3 a {
  color: var(--color-primary);
}

.update-content h3 a:hover {
  color: var(--color-accent);
}

.update-content p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 12px;
}

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

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

/* 阅读方式说明 */
.read-guide {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-bottom: 40px;
}

.read-guide-inner h2 {
  font-size: 22px;
  margin-bottom: 8px;
}

.read-guide-inner p {
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.guide-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.guide-links a {
  padding: 8px 20px;
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
}

.guide-links a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* 更新页图片 */
.updates-media {
  margin: 40px 0 0;
}

.media-figure {
  margin: 0;
}

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

.media-figure figcaption {
  font-size: 13px;
  color: var(--color-text-light);
  padding: 8px 4px 0;
  text-align: center;
}

/* ============================================================
   pages — 常见问题页
   ============================================================ */
.page-faq .faq-group {
  margin-bottom: 48px;
}

.faq-group > h2 {
  font-size: 24px;
  margin-bottom: 8px;
}

.group-desc {
  color: var(--color-text-light);
  margin-bottom: 20px;
}

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

.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

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

.faq-item summary {
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 44px;
  transition: color 0.2s ease;
}

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

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

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

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

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

.faq-answer p {
  font-size: 15px;
  color: var(--color-text-light);
  padding-top: 16px;
  margin-bottom: 8px;
}

.faq-answer a {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
}

.faq-answer a:hover {
  color: var(--color-accent-dark);
}

/* FAQ 相关链接 */
.page-faq .link-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 40px;
}

/* ============================================================
   pages — 品牌起点页
   ============================================================ */
.page-origin .section-block {
  margin-bottom: 48px;
}

/* 命名故事 */
.naming-story {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 40px;
  align-items: center;
}

.story-copy h2 {
  font-size: 26px;
  margin-bottom: 16px;
}

.story-copy p {
  color: var(--color-text-light);
  margin-bottom: 12px;
}

.story-media {
  margin: 0;
}

.story-media img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.story-media figcaption {
  font-size: 13px;
  color: var(--color-text-light);
  padding: 8px 4px 0;
  text-align: center;
}

/* 理念三列 */
.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.philosophy-item {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 28px 24px;
}

.philosophy-item h3 {
  font-size: 18px;
  margin-bottom: 8px;
  color: var(--color-primary);
}

.philosophy-item p {
  font-size: 14px;
  color: var(--color-text-light);
}

/* 工作原则 */
.page-origin .principles-grid {
  grid-template-columns: 1fr 1fr;
}

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

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

.principle-item p {
  font-size: 14px;
  color: var(--color-text-light);
}

/* 现状衔接 */
.current-link {
  background: var(--color-primary);
  border-radius: var(--radius-md);
  padding: 40px;
  text-align: center;
}

.current-link h2 {
  color: #fff;
  font-size: 24px;
  margin-bottom: 12px;
}

.current-link p {
  color: rgba(255, 255, 255, 0.7);
  max-width: 640px;
  margin: 0 auto 24px;
}

.link-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.action-link {
  display: inline-block;
  padding: 12px 28px;
  background: var(--color-accent);
  color: #fff;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background-color 0.2s ease;
}

.action-link:hover {
  background: var(--color-accent-dark);
  color: #fff;
}

/* ============================================================
   pages — 404 页
   ============================================================ */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - var(--header-height) - 260px);
  padding: 48px 24px;
}

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

.error-code {
  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 {
  color: var(--color-text-light);
  margin-bottom: 24px;
}

/* ============================================================
   responsive — 响应式
   ============================================================ */
@media (max-width: 1024px) {
  /* 内页主容器 */
  .inner-main {
    padding: 0 20px 48px;
  }

  /* 首页 hero */
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

  /* 场景对比 */
  .scenario-layout {
    grid-template-columns: 1fr;
  }

  .scenario-tabs {
    flex-direction: row;
    flex-wrap: wrap;
  }

  /* 服务页 */
  .stage-layout {
    grid-template-columns: 1fr;
  }

  .stage-image img {
    height: 200px;
  }

  /* 方法页 */
  .method-detail,
  .method-detail-reverse {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .method-detail-reverse .method-text {
    order: 1;
  }

  .method-detail-reverse .method-figure {
    order: 2;
  }

  /* 品牌起点 */
  .naming-story {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

@media (max-width: 768px) {
  /* 基础字号调整 */
  h1 {
    font-size: 26px;
  }

  h2 {
    font-size: 22px;
  }

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

  /* 页头：汉堡菜单 */
  .site-header {
    position: relative;
  }

  .header-inner {
    height: auto;
    min-height: 60px;
    flex-wrap: wrap;
    padding: 12px 16px;
    gap: 8px;
  }

  .site-nav {
    width: 100%;
    order: 3;
  }

  .site-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }

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

  .nav-link {
    padding: 12px 16px;
    border-radius: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .has-submenu .submenu {
    position: static;
    display: block;
    background: transparent;
    box-shadow: none;
    padding: 0;
  }

  .has-submenu .submenu a {
    padding-left: 32px;
  }

  /* 面包屑 */
  .breadcrumb {
    padding: 12px 0 8px;
    font-size: 13px;
  }

  /* 页面标题 */
  .page-header {
    padding: 4px 0 12px;
    margin-bottom: 16px;
  }

  /* 首页模块 */
  .hero-section {
    padding: 40px 0 32px;
  }

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

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

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

  .intro-updates-section {
    padding: 40px 0 32px;
  }

  .service-matrix-section,
  .method-steps-section,
  .scenario-compare-section,
  .faq-preview-section,
  .process-timeline-section {
    padding: 32px 0 40px;
  }

  .stage-create .service-grid-two,
  .stage-support .service-grid-three {
    grid-template-columns: 1fr;
  }

  .method-steps-row {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .step-arrow {
    transform: rotate(90deg);
  }

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

  .timeline-row {
    grid-template-columns: 1fr;
  }

  /* 服务页 */
  .stage-nav ul {
    gap: 8px;
  }

  .stage-create .stage-services,
  .stage-support .stage-services {
    grid-template-columns: 1fr;
  }

  .method-banner {
    flex-direction: column;
    text-align: center;
    padding: 32px 24px;
  }

  /* 方法页 */
  .steps-overview {
    grid-template-columns: 1fr 1fr;
  }

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

  /* 合作流程 */
  .timeline-list .timeline-item {
    grid-template-columns: 56px 1fr;
    gap: 12px;
    padding-left: 20px;
  }

  .start-link .link-group {
    grid-template-columns: 1fr;
  }

  .cooperation-table {
    min-width: 640px;
  }

  /* 更新页 */
  .update-card {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .update-meta {
    flex-direction: row;
    align-items: center;
  }

  /* FAQ */
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .page-faq .link-cards {
    grid-template-columns: 1fr;
  }

  /* 品牌起点 */
  .philosophy-grid {
    grid-template-columns: 1fr;
  }

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

  .current-link {
    padding: 32px 24px;
  }

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

  .footer-bottom {
    padding: 12px 16px;
  }
}

@media (max-width: 480px) {
  .home-main .hero-inner,
  .home-main .intro-updates-inner,
  .home-main .service-matrix-section,
  .home-main .method-steps-section,
  .home-main .scenario-compare-section,
  .home-main .faq-preview-section,
  .home-main .process-timeline-section {
    padding-left: 16px;
    padding-right: 16px;
  }

  .inner-main {
    padding: 0 16px 40px;
  }

  .step-overview-item {
    padding: 16px;
  }

  .steps-overview {
    grid-template-columns: 1fr;
    gap: 12px;
  }

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

  .stage-head {
    gap: 8px;
  }

  .compare-row {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .scenario-panel {
    padding: 20px 16px;
  }

  .timeline-list .timeline-item {
    grid-template-columns: 44px 1fr;
    padding-left: 16px;
  }

  .timeline-list .timeline-item::before {
    left: -6px;
  }

  .timeline-list .step-number {
    width: 36px;
    height: 36px;
    line-height: 36px;
    font-size: 15px;
  }

  .method-detail,
  .method-detail-reverse {
    gap: 16px;
  }

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

  .story-media img {
    height: 220px;
  }

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

  .stage-image img {
    height: 180px;
  }

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

  .selector-tabs {
    flex-direction: column;
  }

  .selector-tab {
    text-align: center;
  }

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

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