/* =========================================================
   网红黑料 企业官网 · 整站样式表
   版本: 1.0
   说明: 覆盖整站全部真实 DOM 结构, 服从 DOM 顺序
   ========================================================= */

/* =========================================================
   Base — 基础变量与全局重置
   ========================================================= */
:root {
  --color-primary: #1B2A4A;
  --color-accent: #F5A623;
  --color-bg: #F9FAFB;
  --color-text: #333333;
  --color-border: #E5E7EB;
  --color-white: #ffffff;
  --color-primary-light: #2A3D66;
  --color-primary-dark: #141F36;
  --color-accent-light: #FFC55C;
  --color-accent-dark: #D98E12;
  --color-text-light: #6B7280;
  --font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --container-width: 1200px;
  --border-radius: 6px;
  --transition-base: 0.2s ease;
  --header-height: 72px;
  --font-size-h1: 2.25rem;
  --font-size-h2: 1.75rem;
  --font-size-h3: 1.5rem;
  --font-size-body: 1rem;
  --line-height-body: 1.6;
}

*,
*::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-family);
  font-size: var(--font-size-body);
  line-height: var(--line-height-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-family);
  color: var(--color-primary);
  line-height: 1.3;
  font-weight: 600;
}

h1 {
  font-size: var(--font-size-h1);
}

h2 {
  font-size: var(--font-size-h2);
}

h3 {
  font-size: var(--font-size-h3);
}

p {
  margin-bottom: 0.5rem;
}

/* =========================================================
   Layout — 全站统一布局骨架
   ========================================================= */

.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

.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;
}

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

.brand-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0;
}

.brand-tagline {
  font-size: 0.8rem;
  color: var(--color-text-light);
  white-space: nowrap;
}

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

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

.nav-list li {
  position: relative;
}

.nav-link {
  display: block;
  padding: 8px 14px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--border-radius);
  transition: background-color var(--transition-base), color var(--transition-base);
}

.nav-link:hover {
  color: var(--color-primary);
  background-color: rgba(27, 42, 74, 0.06);
}

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

.nav-link.is-current::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  background-color: var(--color-accent);
  border-radius: 1px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  cursor: pointer;
  padding: 8px;
  flex-shrink: 0;
}

.toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 1px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.site-main {
  flex: 1;
  display: flex;
  flex-direction: column;
}

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

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-logo {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
}

.footer-logo .brand-name {
  color: var(--color-white);
  font-size: 1.25rem;
}

.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.7);
}

.footer-column h3 {
  color: var(--color-white);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
}

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

.footer-column ul li a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.875rem;
  transition: color var(--transition-base);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding: 16px 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
  margin: 0;
}

/* =========================================================
   Components — 通用组件样式
   ========================================================= */

/* 按钮 */
.btn-primary,
.cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 28px;
  background-color: var(--color-accent);
  color: var(--color-primary);
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid var(--color-accent);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

.btn-primary:hover,
.cta-button:hover {
  background-color: var(--color-accent-light);
  border-color: var(--color-accent-light);
  color: var(--color-primary);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 28px;
  background-color: transparent;
  color: var(--color-primary);
  font-size: 0.95rem;
  font-weight: 500;
  border: 1px solid var(--color-primary);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background-color var(--transition-base), color var(--transition-base);
}

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

.btn-text {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 0;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-accent);
  transition: color var(--transition-base);
}

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

.cta-button.secondary {
  background-color: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.6);
}

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

/* 面包屑 */
.breadcrumb {
  max-width: var(--container-width);
  width: 100%;
  margin: 0 auto;
  padding: 16px 24px 0;
  font-size: 0.85rem;
  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-border);
}

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

.breadcrumb-nav {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
}

.breadcrumb-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 14px 24px;
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
}

.breadcrumb-list li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb-list li + li::before {
  content: "/";
  color: var(--color-border);
}

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

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

/* 页面标题区 */
.page-header {
  max-width: var(--container-width);
  width: 100%;
  margin: 0 auto;
  padding: 32px 24px 16px;
}

.page-title {
  color: var(--color-primary);
  font-size: var(--font-size-h1);
  font-weight: 700;
}

.page-title-area {
  max-width: var(--container-width);
  width: 100%;
  margin: 0 auto;
  padding: 0 24px 24px;
}

.page-title-area p {
  font-size: 1rem;
  color: var(--color-text);
  max-width: 720px;
}

.page-title-block {
  max-width: var(--container-width);
  width: 100%;
  margin: 0 auto;
  padding: 0 24px 24px;
}

.page-title-block p {
  font-size: 1rem;
  color: var(--color-text);
  max-width: 720px;
}

/* 内页布局 */
.inner-main {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

.page-layout {
  max-width: var(--container-width);
  width: 100%;
  margin: 0 auto;
  padding: 0 24px 48px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 40px;
  align-items: start;
}

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

.sidebar-area {
  min-width: 0;
}

/* 侧栏卡片 */
.sidebar-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 24px;
  margin-bottom: 24px;
}

.sidebar-card h3 {
  font-size: 1.125rem;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-accent);
}

.sidebar-links li {
  margin-bottom: 10px;
}

.sidebar-links li a {
  font-size: 0.9rem;
  color: var(--color-text);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.sidebar-links li a::before {
  content: "›";
  color: var(--color-accent);
  font-size: 1.1rem;
  line-height: 1;
}

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

/* FAQ 手风琴 */
.faq-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  padding: 16px 20px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  transition: background-color var(--transition-base);
}

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

.faq-item summary::after {
  content: "+";
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--color-accent);
  flex-shrink: 0;
  transition: transform var(--transition-base);
}

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

.faq-item summary:hover {
  background-color: rgba(245, 166, 35, 0.06);
}

.faq-answer {
  padding: 0 20px 16px;
  border-top: 1px solid var(--color-border);
}

.faq-answer p {
  font-size: 0.95rem;
  color: var(--color-text);
  line-height: 1.7;
  padding-top: 12px;
  margin-bottom: 0;
}

/* 滚动出现动画 */
.section-block,
.knowledge-section,
.about-section,
.steps-section,
.requirements-section,
.feedback-section,
.preparation-section,
.response-section,
.faq-section,
.contact-intro,
.inner-link-cards,
.faq-support,
.faq-cta,
.contact-cta,
.process-preview,
.services-overview,
.knowledge-entry,
.faq-preview {
  animation: fadeInUp 0.5s ease both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* =========================================================
   Pages — 首页 (index.html)
   ========================================================= */

.home-main {
  width: 100%;
}

/* Hero */
.hero-section {
  background-color: var(--color-primary);
  width: 100%;
}

.hero-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 64px 24px;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 48px;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
}

.hero-content h1 {
  color: var(--color-white);
  font-size: var(--font-size-h1);
  line-height: 1.25;
  margin-bottom: 8px;
}

.hero-lead {
  font-size: 1.125rem;
  color: var(--color-accent);
  font-weight: 500;
  margin-bottom: 4px;
}

.hero-desc {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.7;
  margin-bottom: 12px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 8px;
}

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

.hero-actions .btn-secondary {
  border-color: rgba(255, 255, 255, 0.7);
  color: var(--color-white);
}

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

.hero-figure {
  width: 100%;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

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

/* 服务概览 */
.services-overview {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 64px 24px;
}

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

.section-header h2 {
  margin-bottom: 8px;
}

.section-header p {
  font-size: 1rem;
  color: var(--color-text-light);
  max-width: 640px;
}

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

.service-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.service-card:hover {
  box-shadow: 0 8px 24px rgba(27, 42, 74, 0.08);
  transform: translateY(-4px);
}

.service-card h3 {
  font-size: 1.125rem;
  margin-bottom: 4px;
  position: relative;
  padding-bottom: 12px;
}

.service-card h3::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 40px;
  height: 2px;
  background-color: var(--color-accent);
}

.service-card p {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.7;
  flex: 1;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-primary);
  margin-top: 8px;
}

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

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

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

.process-preview .section-header {
  max-width: var(--container-width);
  margin: 0 auto 40px;
  padding: 0 24px;
}

.process-steps {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}

.process-steps .step-item {
  position: relative;
  padding: 24px;
  background-color: var(--color-bg);
  border-radius: var(--border-radius);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.process-steps .step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 1rem;
  font-weight: 700;
  border-radius: 50%;
  margin-bottom: 8px;
}

.process-steps .step-item h3 {
  font-size: 1.125rem;
}

.process-steps .step-item p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

.process-link-wrap {
  max-width: var(--container-width);
  margin: 32px auto 0;
  padding: 0 24px;
  text-align: center;
}

/* 知识中心入口 */
.knowledge-entry {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 64px 24px;
}

.knowledge-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.8fr);
  gap: 48px;
  align-items: center;
}

.knowledge-list h2 {
  margin-bottom: 8px;
}

.knowledge-list > p {
  font-size: 1rem;
  color: var(--color-text-light);
  margin-bottom: 24px;
}

.article-list li {
  margin-bottom: 12px;
}

.article-list li a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  font-size: 0.95rem;
  color: var(--color-text);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.article-list li a::before {
  content: "▸";
  color: var(--color-accent);
  font-size: 1rem;
  flex-shrink: 0;
}

.article-list li a:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 12px rgba(245, 166, 35, 0.1);
}

.knowledge-figure {
  width: 100%;
  border-radius: var(--border-radius);
  overflow: hidden;
}

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

/* FAQ 预览 */
.faq-preview {
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
  padding: 64px 0;
}

.faq-preview .section-header {
  max-width: var(--container-width);
  margin: 0 auto 32px;
  padding: 0 24px;
}

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

.faq-preview-list .faq-item summary {
  font-size: 0.95rem;
}

.faq-preview-list .faq-item p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
  padding: 12px 20px 16px;
  border-top: 1px solid var(--color-border);
}

.faq-more-link {
  max-width: var(--container-width);
  margin: 24px auto 0;
  padding: 0 24px;
  text-align: center;
}

/* 联系 CTA */
.contact-cta {
  background-color: var(--color-primary);
  padding: 64px 24px;
  text-align: center;
}

.contact-cta h2 {
  color: var(--color-white);
  margin-bottom: 12px;
}

.contact-cta p {
  color: rgba(255, 255, 255, 0.8);
  max-width: 640px;
  margin: 0 auto 32px;
  font-size: 1rem;
}

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

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

.cta-actions .btn-secondary {
  border-color: rgba(255, 255, 255, 0.7);
  color: var(--color-white);
}

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

/* 相关链接 */
.related-links {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
}

.related-links-label {
  font-size: 0.9rem;
  color: var(--color-text-light);
}

.related-links-item {
  font-size: 0.9rem;
  color: var(--color-primary);
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  transition: border-color var(--transition-base), color var(--transition-base);
}

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

/* =========================================================
   Pages — 服务能力 (whhl/services.html)
   ========================================================= */

.page-services {
  background-color: var(--color-bg);
}

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

.title-desc {
  font-size: 1rem;
  color: var(--color-text-light);
  max-width: 720px;
}

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

.section-block h2 {
  margin-bottom: 8px;
}

.section-lead {
  font-size: 1rem;
  color: var(--color-text-light);
  margin-bottom: 32px;
}

.service-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
  gap: 32px;
  align-items: center;
  padding: 32px 0;
  border-bottom: 1px solid var(--color-border);
}

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

.service-item:nth-child(even) {
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1fr);
}

.service-item:nth-child(even) .service-text {
  order: 2;
}

.service-item:nth-child(even) .service-figure {
  order: 1;
}

.service-text h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
  position: relative;
  padding-bottom: 12px;
}

.service-text h3::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 40px;
  height: 2px;
  background-color: var(--color-accent);
}

.service-text p {
  font-size: 0.95rem;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: 12px;
}

.service-figure {
  width: 100%;
  border-radius: var(--border-radius);
  overflow: hidden;
}

.service-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.service-figure figcaption {
  font-size: 0.8rem;
  color: var(--color-text-light);
  padding: 8px 4px 0;
  text-align: center;
}

/* 场景列表 */
.scenario-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.scenario-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 20px 24px;
}

.scenario-item h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.scenario-item h3::before {
  content: "";
  width: 8px;
  height: 8px;
  background-color: var(--color-accent);
  border-radius: 50%;
  flex-shrink: 0;
}

.scenario-item p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin: 0;
}

/* 交付标准 */
.delivery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.delivery-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 24px;
  text-align: center;
}

.delivery-card h3 {
  font-size: 1rem;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-accent);
}

.delivery-card p {
  font-size: 0.85rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin: 0;
}

/* =========================================================
   Pages — 合作流程 (whhl/process.html)
   ========================================================= */

.page-process {
  background-color: var(--color-bg);
}

.content-media-inline {
  max-width: 720px;
  margin: 0 auto 32px;
  border-radius: var(--border-radius);
  overflow: hidden;
}

.content-media-inline img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}

.content-media-inline figcaption {
  font-size: 0.8rem;
  color: var(--color-text-light);
  padding: 8px 4px 0;
  text-align: center;
}

.steps-section,
.requirements-section,
.feedback-section {
  max-width: var(--container-width);
  width: 100%;
  margin: 0 auto;
  padding: 48px 24px;
}

.steps-section h2,
.requirements-section h2,
.feedback-section h2 {
  margin-bottom: 8px;
}

.steps-section > p,
.requirements-section > p,
.feedback-section > p {
  font-size: 1rem;
  color: var(--color-text-light);
  margin-bottom: 32px;
}

.steps-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.steps-list .step-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 56px;
  gap: 24px;
  align-items: center;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 24px 32px;
}

.step-content {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.step-content .step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 0.9rem;
  font-weight: 700;
  border-radius: 50%;
}

.step-content h3 {
  font-size: 1.125rem;
}

.step-content p {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin: 0;
}

.step-icon {
  display: flex;
  align-items: center;
  justify-content: center;
}

.icon-message,
.icon-chart,
.icon-check,
.icon-document,
.icon-refresh {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background-color: rgba(245, 166, 35, 0.1);
  border-radius: 50%;
  position: relative;
}

.icon-message::before,
.icon-chart::before,
.icon-check::before,
.icon-document::before,
.icon-refresh::before {
  content: "";
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-accent);
  border-radius: 3px;
}

.icon-check::before {
  border-radius: 50%;
  background-color: var(--color-accent);
}

.icon-refresh::before {
  border-radius: 50%;
  border-top-color: transparent;
}

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

.requirement-col {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 24px;
}

.requirement-col h3 {
  font-size: 1.125rem;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-accent);
}

.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 8px 0;
  font-size: 0.95rem;
  color: var(--color-text);
  line-height: 1.5;
}

.check-list li::before {
  content: "✓";
  color: var(--color-accent);
  font-weight: 700;
  flex-shrink: 0;
}

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

.feedback-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 24px;
}

.feedback-card h3 {
  font-size: 1.125rem;
  margin-bottom: 12px;
}

.feedback-card p {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin: 0;
}

.cta-section {
  max-width: var(--container-width);
  width: 100%;
  margin: 0 auto;
  padding: 0 24px 64px;
}

.cta-box {
  background-color: var(--color-primary);
  border-radius: var(--border-radius);
  padding: 48px 32px;
  text-align: center;
}

.cta-box h2 {
  color: var(--color-white);
  margin-bottom: 12px;
}

.cta-box p {
  color: rgba(255, 255, 255, 0.8);
  max-width: 640px;
  margin: 0 auto 24px;
  font-size: 1rem;
}

.cta-box .cta-actions {
  justify-content: center;
}

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

.cta-box .btn-secondary {
  border-color: rgba(255, 255, 255, 0.7);
  color: var(--color-white);
}

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

/* =========================================================
   Pages — 知识中心 (whhl/knowledge.html)
   ========================================================= */

.page-knowledge {
  background-color: var(--color-bg);
}

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

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

.catalog-sidebar {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 24px;
  position: sticky;
  top: calc(var(--header-height) + 16px);
}

.catalog-sidebar h2 {
  font-size: 1.125rem;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-accent);
}

.catalog-list li {
  margin-bottom: 8px;
}

.catalog-list li a {
  display: block;
  padding: 8px 12px;
  font-size: 0.9rem;
  color: var(--color-text);
  border-radius: var(--border-radius);
  transition: background-color var(--transition-base), color var(--transition-base);
}

.catalog-list li a:hover {
  background-color: rgba(245, 166, 35, 0.1);
  color: var(--color-primary);
}

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

.knowledge-section {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 32px;
  margin-bottom: 24px;
}

.knowledge-section h2 {
  font-size: 1.5rem;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-accent);
}

.knowledge-section > p {
  font-size: 0.95rem;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: 16px;
}

.knowledge-figure {
  margin-top: 16px;
  border-radius: var(--border-radius);
  overflow: hidden;
}

.knowledge-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}

.article-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.article-card {
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 20px;
  transition: box-shadow var(--transition-base);
}

.article-card:hover {
  box-shadow: 0 4px 16px rgba(27, 42, 74, 0.08);
}

.article-card h3 {
  font-size: 1.125rem;
  margin-bottom: 8px;
}

.article-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 12px;
}

.article-card a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.article-card a::after {
  content: "→";
  transition: transform var(--transition-base);
}

.article-card a:hover::after {
  transform: translateX(4px);
}

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

.mistake-item {
  border-left: 3px solid var(--color-accent);
  background-color: var(--color-bg);
  padding: 16px 20px;
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.mistake-item h3 {
  font-size: 1rem;
  margin-bottom: 6px;
}

.mistake-item p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin: 0;
}

.knowledge-note {
  background-color: rgba(245, 166, 35, 0.08);
  border: 1px solid rgba(245, 166, 35, 0.3);
  border-radius: var(--border-radius);
  padding: 20px 24px;
  margin-top: 16px;
}

.knowledge-note p {
  font-size: 0.9rem;
  color: var(--color-text);
  line-height: 1.6;
  margin: 0;
}

.knowledge-note a {
  font-weight: 600;
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-accent);
}

/* =========================================================
   Pages — 常见问题 (whhl/faq.html)
   ========================================================= */

.page-faq {
  background-color: var(--color-bg);
}

.faq-intro {
  max-width: var(--container-width);
  width: 100%;
  margin: 0 auto;
  padding: 24px 24px 48px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.6fr);
  gap: 32px;
  align-items: center;
}

.faq-intro-text h2 {
  margin-bottom: 12px;
}

.faq-intro-text p {
  font-size: 1rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin: 0;
}

.faq-intro-media {
  border-radius: var(--border-radius);
  overflow: hidden;
}

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

.faq-section {
  max-width: var(--container-width);
  width: 100%;
  margin: 0 auto;
  padding: 24px;
}

.faq-section h2 {
  font-size: 1.5rem;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-accent);
}

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

.faq-support {
  max-width: var(--container-width);
  width: 100%;
  margin: 0 auto;
  padding: 24px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.support-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 32px;
  text-align: center;
}

.support-card h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.support-card p {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 20px;
}

.faq-cta {
  max-width: var(--container-width);
  width: 100%;
  margin: 0 auto;
  padding: 48px 24px 64px;
  text-align: center;
}

.faq-cta h2 {
  margin-bottom: 12px;
}

.faq-cta p {
  font-size: 1rem;
  color: var(--color-text-light);
  max-width: 640px;
  margin: 0 auto 24px;
}

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

/* =========================================================
   Pages — 关于我们 (whhl/about.html)
   ========================================================= */

.page-about {
  background-color: var(--color-bg);
}

.about-section {
  max-width: var(--container-width);
  width: 100%;
  margin: 0 auto;
  padding: 48px 24px;
}

.positioning-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.8fr);
  gap: 48px;
  align-items: center;
}

.text-col h2 {
  margin-bottom: 16px;
}

.text-col p {
  font-size: 1rem;
  color: var(--color-text);
  line-height: 1.8;
  margin-bottom: 16px;
}

.image-col {
  border-radius: var(--border-radius);
  overflow: hidden;
}

.image-col img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

.principles-section h2,
.team-section h2,
.compliance-section h2 {
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-accent);
}

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

.principle-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 24px;
  text-align: center;
}

.principle-card h3 {
  font-size: 1rem;
  margin-bottom: 12px;
  position: relative;
  padding-bottom: 12px;
}

.principle-card h3::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 32px;
  height: 2px;
  background-color: var(--color-accent);
}

.principle-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin: 0;
}

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

.team-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 24px;
}

.team-item h3 {
  font-size: 1.125rem;
  margin-bottom: 12px;
}

.team-item p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin: 0;
}

.team-note {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-top: 16px;
  padding: 12px 16px;
  background-color: var(--color-white);
  border-radius: var(--border-radius);
  border: 1px solid var(--color-border);
}

.compliance-section p {
  font-size: 0.95rem;
  color: var(--color-text);
  line-height: 1.7;
  max-width: 800px;
}

.contact-cta-block {
  background-color: var(--color-primary);
  padding: 64px 24px;
  text-align: center;
}

.contact-cta-block h2 {
  color: var(--color-white);
  margin-bottom: 12px;
}

.contact-cta-block p {
  color: rgba(255, 255, 255, 0.8);
  max-width: 640px;
  margin: 0 auto 32px;
  font-size: 1rem;
}

.contact-cta-block .cta-links {
  justify-content: center;
}

.contact-cta-block .cta-button {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-primary);
}

.contact-cta-block .cta-button.secondary {
  background-color: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.6);
}

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

/* =========================================================
   Pages — 合作咨询 (whhl/contact.html)
   ========================================================= */

.page-contact {
  background-color: var(--color-bg);
}

.contact-intro {
  max-width: var(--container-width);
  width: 100%;
  margin: 0 auto;
  padding: 24px 24px 48px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.6fr);
  gap: 48px;
  align-items: start;
}

.contact-copy h2 {
  margin-bottom: 16px;
}

.contact-copy > p {
  font-size: 1rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 24px;
}

.contact-method-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-method-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 20px 24px;
}

.contact-method-item h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.contact-method-item p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 8px;
}

.contact-method-item a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-accent);
}

.contact-aside {
  border-radius: var(--border-radius);
  overflow: hidden;
}

.contact-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 5;
}

.contact-figure figcaption {
  font-size: 0.8rem;
  color: var(--color-text-light);
  padding: 8px 4px 0;
  text-align: center;
}

.preparation-section,
.response-section {
  max-width: var(--container-width);
  width: 100%;
  margin: 0 auto;
  padding: 24px;
}

.preparation-section h2,
.response-section h2 {
  margin-bottom: 12px;
}

.preparation-section > p,
.response-section > p {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 20px;
}

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

.preparation-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 20px 24px;
}

.preparation-item h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.preparation-item h3::before {
  content: "";
  width: 8px;
  height: 8px;
  background-color: var(--color-accent);
  border-radius: 50%;
  flex-shrink: 0;
}

.preparation-item p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin: 0;
}

.response-section p {
  font-size: 0.95rem;
  color: var(--color-text);
  line-height: 1.7;
  max-width: 720px;
}

.inner-link-cards {
  max-width: var(--container-width);
  width: 100%;
  margin: 0 auto;
  padding: 24px 24px 64px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.link-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 32px;
  text-align: center;
}

.link-card h3 {
  font-size: 1.125rem;
  margin-bottom: 12px;
}

.link-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 16px;
}

.link-card a {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-accent);
}

/* =========================================================
   Pages — 404 (404.html)
   ========================================================= */

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

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

.error-section {
  text-align: center;
  padding: 48px 24px;
  max-width: 560px;
}

.error-code {
  font-size: 6rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 16px;
}

.error-section h1 {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.error-section p {
  font-size: 1rem;
  color: var(--color-text-light);
  margin-bottom: 24px;
}

.error-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 32px;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--border-radius);
  transition: background-color var(--transition-base);
}

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

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

@media (max-width: 1024px) {
  .footer-inner {
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 32px;
  }

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

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

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

  .page-layout {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 24px;
  }

  .page-layout.sidebar-left,
  .sidebar-left .page-layout {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 24px;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 60px;
    --font-size-h1: 1.75rem;
    --font-size-h2: 1.5rem;
    --font-size-h3: 1.25rem;
  }

  .header-inner {
    padding: 0 16px;
    height: var(--header-height);
  }

  .brand-tagline {
    display: none;
  }

  /* 移动导航 */
  .nav-toggle {
    display: flex;
  }

  .main-nav.site-nav {
    position: relative;
  }

  .nav-list {
    position: absolute;
    top: calc(var(--header-height) - 1px);
    right: -16px;
    left: -16px;
    flex-direction: column;
    align-items: stretch;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 8px 24px rgba(27, 42, 74, 0.1);
    padding: 8px 16px;
    gap: 0;
    display: none;
  }

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

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

  .nav-link {
    padding: 12px 16px;
    font-size: 1rem;
    border-radius: var(--border-radius);
  }

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

  .nav-link.is-current {
    background-color: rgba(245, 166, 35, 0.1);
    color: var(--color-primary);
  }

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

  .hero-content {
    align-items: center;
    text-align: center;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-figure {
    max-width: 480px;
    margin: 0 auto;
  }

  .services-overview {
    padding: 48px 16px;
  }

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

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

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

  .process-steps {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 0 16px;
  }

  .process-link-wrap {
    padding: 0 16px;
  }

  .knowledge-entry {
    padding: 48px 16px;
  }

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

  .knowledge-figure {
    max-width: 480px;
    margin: 0 auto;
  }

  .faq-preview {
    padding: 48px 0;
  }

  .faq-preview .section-header,
  .faq-preview-list,
  .faq-more-link {
    padding-left: 16px;
    padding-right: 16px;
  }

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

  .related-links {
    padding: 16px;
  }

  /* 内页通用 */
  .breadcrumb,
  .page-header,
  .page-title-area,
  .page-title-block,
  .title-inner {
    padding-left: 16px;
    padding-right: 16px;
  }

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

  .breadcrumb-inner {
    padding: 12px 16px;
  }

  /* 服务页 */
  .page-layout {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 0 16px 32px;
  }

  .sidebar-area {
    order: 2;
  }

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

  .service-item:nth-child(even) {
    grid-template-columns: 1fr;
  }

  .service-item:nth-child(even) .service-text {
    order: 1;
  }

  .service-item:nth-child(even) .service-figure {
    order: 2;
  }

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

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

  /* 流程页 */
  .content-media-inline {
    margin: 0 16px 24px;
  }

  .steps-section,
  .requirements-section,
  .feedback-section {
    padding: 32px 16px;
  }

  .steps-list .step-item {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 20px;
  }

  .step-icon {
    justify-content: flex-start;
  }

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

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

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

  .cta-box {
    padding: 32px 20px;
  }

  /* 知识页 */
  .page-layout.sidebar-left,
  .sidebar-left .page-layout {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 0 16px 32px;
  }

  .catalog-sidebar {
    position: static;
    order: 2;
    margin-top: 0;
  }

  .knowledge-content {
    order: 1;
  }

  .knowledge-section {
    padding: 24px 16px;
  }

  /* FAQ 页 */
  .faq-intro {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 16px 16px 32px;
  }

  .faq-intro-media {
    max-width: 480px;
  }

  .faq-section {
    padding: 16px;
  }

  .faq-support {
    grid-template-columns: 1fr;
    padding: 16px;
  }

  .faq-cta {
    padding: 32px 16px 48px;
  }

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

  .positioning-section {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

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

  .contact-cta-block {
    padding: 48px 16px;
  }

  /* 联系页 */
  .contact-intro {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 16px 16px 32px;
  }

  .contact-aside {
    max-width: 480px;
  }

  .preparation-section,
  .response-section {
    padding: 16px;
  }

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

  .inner-link-cards {
    grid-template-columns: 1fr;
    padding: 16px 16px 48px;
  }

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

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

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

@media (max-width: 480px) {
  .hero-inner {
    padding: 32px 16px;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

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

  .cta-actions {
    flex-direction: column;
    width: 100%;
    align-items: center;
  }

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

  .cta-links {
    flex-direction: column;
    width: 100%;
    align-items: center;
  }

  .cta-links .btn-primary,
  .cta-links .btn-secondary {
    width: 100%;
  }

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

  .footer-brand {
    grid-column: auto;
  }

  .service-card {
    padding: 24px 20px;
  }

  .knowledge-section {
    padding: 20px 16px;
  }

  .article-card {
    padding: 16px;
  }

  .faq-item summary {
    padding: 14px 16px;
    font-size: 0.95rem;
  }

  .faq-answer {
    padding: 0 16px 14px;
  }

  .support-card {
    padding: 24px 16px;
  }

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

  .team-item {
    padding: 20px 16px;
  }

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

  .scenario-item {
    padding: 16px;
  }

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

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

  .contact-method-item {
    padding: 16px;
  }

  .preparation-item {
    padding: 16px;
  }

  .link-card {
    padding: 24px 16px;
  }

  .error-code {
    font-size: 4rem;
  }
}