/* 钉钉官方下载 - 站台屏蔽门视觉系统样式表 (v133)
 * 风格：站台屏蔽门｜骨架：屏蔽门+车门对齐+候车+页脚
 * 配色：站台屏蔽门深藤紫 #7F2489 + 站台屏蔽门辅浅绛红 #E7CFDA
 * 背景：站台地砖｜字体：冬青黑体+Orbitron
 */

:root {
  --psd-purple-dark: #521459;
  --psd-purple: #7F2489;
  --psd-purple-light: #9B3BA6;
  --psd-purple-surface: #F9EEF4;
  --psd-rose-light: #E7CFDA;
  --psd-rose-soft: #F6EDF2;
  --psd-tile-bg: #F8F5F7;
  --psd-card-bg: #FFFFFF;
  --psd-dark: #221025;
  --psd-text: #28182B;
  --psd-muted: #6B556D;
  --psd-accent-green: #2B7A4B;
  --psd-accent-amber: #D97706;
  --border-radius-sm: 6px;
  --border-radius-md: 12px;
  --border-radius-lg: 18px;
  --border-radius-xl: 26px;
  --shadow-sm: 0 2px 8px rgba(127, 36, 137, 0.08);
  --shadow-md: 0 8px 24px rgba(127, 36, 137, 0.1);
  --shadow-lg: 0 16px 36px rgba(127, 36, 137, 0.14);
  --font-main: "Hiragino Sans GB", "冬青黑体", "Orbitron", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Orbitron", Consolas, Monaco, monospace;
}

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

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

body {
  font-family: var(--font-main);
  background-color: var(--psd-tile-bg);
  color: var(--psd-text);
  line-height: 1.6;
  background-image: 
    linear-gradient(to right, rgba(231, 207, 218, 0.45) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(231, 207, 218, 0.45) 1px, transparent 1px);
  background-size: 30px 30px;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 顶部站台屏蔽门状态指示条 */
.psd-status-bar {
  background-color: var(--psd-purple-dark);
  color: var(--psd-rose-light);
  font-size: 13px;
  padding: 6px 0;
  border-bottom: 2px solid var(--psd-purple);
}
.psd-status-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.psd-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(231, 207, 218, 0.18);
  padding: 2px 10px;
  border-radius: 4px;
  border: 1px solid rgba(231, 207, 218, 0.35);
  font-weight: 700;
  letter-spacing: 0.5px;
}

/* 顶部吸顶导航栏 */
.header-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  border-bottom: 2px solid var(--psd-rose-light);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand-box {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-logo-img {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  object-fit: contain;
  background: var(--psd-purple-dark);
  padding: 4px;
}
.brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--psd-purple-dark);
  letter-spacing: -0.5px;
}
.brand-badge {
  font-size: 11px;
  background: var(--psd-rose-light);
  color: var(--psd-purple-dark);
  padding: 2px 8px;
  border-radius: 12px;
  font-weight: 700;
  border: 1px solid rgba(127, 36, 137, 0.2);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}
.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--psd-text);
  padding: 6px 12px;
  border-radius: 6px;
  transition: all 0.2s ease;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--psd-purple);
  background: var(--psd-rose-soft);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}
.btn-login {
  font-size: 14px;
  font-weight: 600;
  color: var(--psd-purple);
  padding: 8px 18px;
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--psd-purple);
  transition: all 0.2s ease;
  background: transparent;
}
.btn-login:hover {
  background: var(--psd-purple-surface);
}
.btn-cta-primary {
  font-size: 14px;
  font-weight: 600;
  color: #FFFFFF;
  background: var(--psd-purple);
  padding: 9px 20px;
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--psd-purple-dark);
  box-shadow: 0 4px 12px rgba(127, 36, 137, 0.25);
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.btn-cta-primary:hover {
  background: var(--psd-purple-light);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(127, 36, 137, 0.3);
}

/* 首屏 Hero 区 */
.hero-section {
  padding: 64px 0 54px;
  position: relative;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}
.hero-content h1 {
  font-size: 38px;
  line-height: 1.25;
  font-weight: 800;
  color: var(--psd-purple-dark);
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}
.hero-content h1 span {
  color: var(--psd-purple);
  position: relative;
  display: inline-block;
}
.hero-content h1 span::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 4px;
  width: 100%;
  height: 8px;
  background: var(--psd-rose-light);
  z-index: -1;
  border-radius: 4px;
}
.hero-subtext {
  font-size: 17px;
  color: var(--psd-muted);
  margin-bottom: 30px;
  line-height: 1.7;
}
.hero-cta-group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 32px;
}
.btn-hero-primary {
  padding: 14px 28px;
  font-size: 16px;
  font-weight: 700;
  color: #FFFFFF;
  background: var(--psd-purple);
  border-radius: var(--border-radius-md);
  border: 1px solid var(--psd-purple-dark);
  box-shadow: var(--shadow-md);
  transition: all 0.25s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-hero-primary:hover {
  background: var(--psd-purple-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.btn-hero-secondary {
  padding: 14px 26px;
  font-size: 16px;
  font-weight: 600;
  color: var(--psd-purple-dark);
  background: var(--psd-rose-soft);
  border-radius: var(--border-radius-md);
  border: 1px solid var(--psd-rose-light);
  transition: all 0.25s ease;
}
.btn-hero-secondary:hover {
  background: var(--psd-rose-light);
}
.hero-tags-row {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--psd-muted);
}
.hero-tags-row span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* 站台屏蔽门 Hero 看板 */
.psd-post-card {
  background: var(--psd-card-bg);
  border-radius: var(--border-radius-lg);
  border: 2px solid var(--psd-purple);
  box-shadow: var(--shadow-md);
  padding: 24px;
  position: relative;
}
.psd-post-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid var(--psd-rose-light);
  padding-bottom: 14px;
  margin-bottom: 18px;
}
.psd-post-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--psd-purple-dark);
  display: flex;
  align-items: center;
  gap: 8px;
}
.psd-post-badge {
  background: var(--psd-accent-green);
  color: #FFFFFF;
  font-size: 12px;
  font-weight: 800;
  padding: 3px 10px;
  border-radius: 6px;
}
.psd-post-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 18px;
}
.psd-metric-box {
  background: var(--psd-purple-surface);
  border: 1px solid var(--psd-rose-light);
  border-radius: var(--border-radius-sm);
  padding: 12px 8px;
  text-align: center;
  transition: all 0.2s ease;
}
.psd-metric-val {
  font-size: 18px;
  font-weight: 800;
  color: var(--psd-purple-dark);
  margin-bottom: 4px;
}
.psd-metric-lbl {
  font-size: 11px;
  color: var(--psd-muted);
}

/* 核心功能区 (4横条卡片 + 2图文交替) */
.section-block {
  padding: 60px 0;
}
.section-title-wrap {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 46px;
}
.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: var(--psd-purple);
  background: var(--psd-rose-soft);
  border: 1px solid var(--psd-rose-light);
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}
.section-title {
  font-size: 30px;
  font-weight: 800;
  color: var(--psd-purple-dark);
  margin-bottom: 12px;
  line-height: 1.3;
}
.section-desc {
  font-size: 16px;
  color: var(--psd-muted);
}

/* 4横条功能卡 */
.features-stack {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 48px;
}
.feature-row-card {
  background: var(--psd-card-bg);
  border: 1px solid var(--psd-rose-light);
  border-left: 6px solid var(--psd-purple);
  border-radius: var(--border-radius-md);
  padding: 24px 28px;
  display: grid;
  grid-template-columns: 200px 1fr 140px;
  align-items: center;
  gap: 24px;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
}
.feature-row-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-left-color: var(--psd-purple-light);
}
.feature-row-main {
  display: flex;
  align-items: center;
  gap: 14px;
}
.feature-icon-badge {
  width: 44px;
  height: 44px;
  background: var(--psd-rose-soft);
  border: 1px solid var(--psd-rose-light);
  color: var(--psd-purple-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  font-size: 20px;
  font-weight: bold;
}
.feature-row-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--psd-purple-dark);
}
.feature-row-body {
  font-size: 14px;
  color: var(--psd-muted);
  line-height: 1.6;
}
.feature-row-meta {
  text-align: right;
  font-size: 12px;
  color: var(--psd-purple);
  font-weight: 700;
}

/* 2图文交替卡片 */
.highlights-split {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.highlight-card {
  background: var(--psd-card-bg);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--psd-rose-light);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.highlight-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--psd-purple-dark);
  margin-bottom: 12px;
}
.highlight-card p {
  font-size: 14px;
  color: var(--psd-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}
.highlight-img-box {
  border-radius: var(--border-radius-md);
  overflow: hidden;
  border: 1px solid var(--psd-rose-light);
  background: var(--psd-tile-bg);
  height: 180px;
}
.highlight-img-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 4步骤批量部署对齐流 */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.step-card {
  background: var(--psd-card-bg);
  border: 1px solid var(--psd-rose-light);
  border-radius: var(--border-radius-md);
  padding: 24px 20px;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
}
.step-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.step-number {
  display: inline-block;
  font-size: 13px;
  font-weight: 800;
  color: #FFFFFF;
  background: var(--psd-purple);
  padding: 3px 10px;
  border-radius: 6px;
  margin-bottom: 14px;
}
.step-card h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--psd-purple-dark);
  margin-bottom: 10px;
}
.step-card p {
  font-size: 13px;
  color: var(--psd-muted);
  line-height: 1.6;
}

/* 深色对照清单 (深藤紫底色) */
.dark-comparison-section {
  background: var(--psd-purple-dark);
  color: #FFFFFF;
  border-radius: var(--border-radius-xl);
  padding: 54px 44px;
  margin: 40px 0;
  border: 2px solid var(--psd-purple-light);
}
.dark-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 36px;
}
.dark-header h3 {
  font-size: 28px;
  font-weight: 800;
  color: var(--psd-rose-light);
  margin-bottom: 12px;
}
.dark-header p {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.85);
}
.comparison-table-wrap {
  overflow-x: auto;
}
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.comparison-table th {
  background: rgba(231, 207, 218, 0.15);
  color: var(--psd-rose-light);
  padding: 16px 20px;
  text-align: left;
  font-weight: 700;
  border-bottom: 2px solid var(--psd-purple-light);
}
.comparison-table td {
  padding: 16px 20px;
  border-bottom: 1px solid rgba(231, 207, 218, 0.1);
  color: rgba(255, 255, 255, 0.9);
}
.comparison-table tr:hover td {
  background: rgba(255, 255, 255, 0.05);
}
.badge-pass {
  background: var(--psd-accent-green);
  color: #FFFFFF;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
}
.badge-warn {
  background: #C0392B;
  color: #FFFFFF;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
}

/* 4岗位气泡卡 */
.personas-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.persona-bubble {
  background: var(--psd-card-bg);
  border: 1px solid var(--psd-rose-light);
  border-radius: var(--border-radius-lg);
  padding: 24px 20px;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
}
.persona-bubble:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--psd-purple);
}
.persona-role {
  font-size: 12px;
  font-weight: 700;
  color: var(--psd-purple-dark);
  background: var(--psd-rose-soft);
  border: 1px solid var(--psd-rose-light);
  padding: 3px 10px;
  border-radius: 12px;
  display: inline-block;
  margin-bottom: 12px;
}
.persona-bubble h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--psd-purple-dark);
  margin-bottom: 10px;
}
.persona-bubble p {
  font-size: 13px;
  color: var(--psd-muted);
  line-height: 1.6;
}

/* 3列实操小技巧 */
.tips-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.tip-card {
  background: var(--psd-card-bg);
  border: 1px solid var(--psd-rose-light);
  border-top: 4px solid var(--psd-purple);
  border-radius: var(--border-radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}
.tip-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.tip-header h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--psd-purple-dark);
}
.tip-card p {
  font-size: 13px;
  color: var(--psd-muted);
  line-height: 1.6;
}

/* 8条原生手风琴 FAQ */
.faq-wrap {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-details {
  background: var(--psd-card-bg);
  border: 1px solid var(--psd-rose-light);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease;
}
.faq-details[open] {
  border-color: var(--psd-purple);
}
.faq-summary {
  padding: 18px 24px;
  font-size: 16px;
  font-weight: 700;
  color: var(--psd-purple-dark);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}
.faq-summary::-webkit-details-marker {
  display: none;
}
.faq-summary::after {
  content: "+";
  font-size: 20px;
  font-weight: 700;
  color: var(--psd-purple);
  transition: transform 0.2s ease;
}
.faq-details[open] .faq-summary::after {
  content: "−";
  transform: rotate(0deg);
}
.faq-content {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--psd-muted);
  line-height: 1.7;
  border-top: 1px dashed var(--psd-rose-light);
  padding-top: 14px;
}

/* 8条带日期资讯列表 */
.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.news-card {
  background: var(--psd-card-bg);
  border: 1px solid var(--psd-rose-light);
  border-radius: var(--border-radius-md);
  padding: 18px 22px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  transition: all 0.2s ease;
}
.news-card:hover {
  border-color: var(--psd-purple);
  box-shadow: var(--shadow-sm);
}
.news-main h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--psd-purple-dark);
  margin-bottom: 4px;
}
.news-main p {
  font-size: 12px;
  color: var(--psd-muted);
}
.news-date {
  font-size: 12px;
  color: var(--psd-muted);
  white-space: nowrap;
  background: var(--psd-purple-surface);
  padding: 4px 8px;
  border-radius: 4px;
  border: 1px solid var(--psd-rose-light);
}

/* 底部 CTA 区 */
.bottom-cta-section {
  background: linear-gradient(135deg, var(--psd-purple-dark) 0%, var(--psd-purple) 100%);
  color: #FFFFFF;
  border-radius: var(--border-radius-xl);
  padding: 60px 48px;
  margin: 60px 0 40px;
  text-align: center;
  box-shadow: var(--shadow-lg);
  border: 2px solid var(--psd-rose-light);
}
.bottom-cta-inner {
  max-width: 760px;
  margin: 0 auto;
}
.bottom-cta-title {
  font-size: 32px;
  font-weight: 800;
  color: var(--psd-rose-light);
  margin-bottom: 16px;
}
.bottom-cta-desc {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 32px;
  line-height: 1.7;
}
.bottom-cta-btns {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.btn-cta-seat {
  background: var(--psd-rose-light);
  color: var(--psd-purple-dark);
  font-size: 16px;
  font-weight: 800;
  padding: 14px 32px;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--psd-rose-light);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  transition: all 0.2s ease;
}
.btn-cta-seat:hover {
  background: #FFFFFF;
  transform: translateY(-2px);
}
.btn-cta-ghost {
  background: rgba(255, 255, 255, 0.15);
  color: #FFFFFF;
  font-size: 16px;
  font-weight: 700;
  padding: 14px 28px;
  border-radius: var(--border-radius-md);
  border: 1px solid rgba(255, 255, 255, 0.3);
  transition: all 0.2s ease;
}
.btn-cta-ghost:hover {
  background: rgba(255, 255, 255, 0.25);
}

/* 页脚 Footer */
.main-footer {
  background: var(--psd-purple-dark);
  color: #FFFFFF;
  border-top: 3px solid var(--psd-purple);
  padding: 50px 0 30px;
  font-size: 13px;
  line-height: 1.7;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 40px;
}
.footer-brand h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--psd-rose-light);
  margin-bottom: 12px;
}
.footer-brand p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 13px;
}
.footer-col h5 {
  font-size: 14px;
  font-weight: 700;
  color: var(--psd-rose-light);
  margin-bottom: 14px;
}
.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-links a {
  color: rgba(255, 255, 255, 0.75);
  transition: color 0.2s ease;
}
.footer-links a:hover {
  color: var(--psd-rose-light);
}
.footer-bottom {
  border-top: 1px solid rgba(231, 207, 218, 0.15);
  padding-top: 24px;
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
  font-size: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* 下载页专用样式 */
.download-hero {
  background: var(--psd-card-bg);
  border: 2px solid var(--psd-rose-light);
  border-radius: var(--border-radius-xl);
  padding: 48px;
  margin: 36px 0;
  box-shadow: var(--shadow-md);
}
.platform-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin: 36px 0;
}
.platform-card {
  background: var(--psd-tile-bg);
  border: 2px solid var(--psd-rose-light);
  border-radius: var(--border-radius-lg);
  padding: 28px;
  text-align: center;
  transition: all 0.25s ease;
}
.platform-card.recommended {
  border-color: var(--psd-purple);
  background: #FFFFFF;
  box-shadow: var(--shadow-md);
  position: relative;
}
.platform-card.recommended::before {
  content: "静默参数支持";
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--psd-purple);
  color: #FFFFFF;
  font-size: 11px;
  font-weight: 800;
  padding: 2px 12px;
  border-radius: 10px;
}
.platform-icon {
  font-size: 36px;
  margin-bottom: 12px;
}
.platform-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--psd-purple-dark);
  margin-bottom: 6px;
}
.platform-ver {
  font-size: 12px;
  color: var(--psd-muted);
  margin-bottom: 16px;
}
.hash-box {
  background: #FFFFFF;
  border: 1px dashed var(--psd-rose-light);
  border-radius: var(--border-radius-sm);
  padding: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--psd-muted);
  word-break: break-all;
  margin: 12px 0 16px;
}

/* 帮助页专用样式 */
.help-hero {
  background: var(--psd-card-bg);
  border: 2px solid var(--psd-rose-light);
  border-radius: var(--border-radius-xl);
  padding: 48px;
  margin: 36px 0;
  box-shadow: var(--shadow-md);
  text-align: center;
}
.help-category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin: 36px 0;
}
.help-cat-card {
  background: var(--psd-card-bg);
  border: 1px solid var(--psd-rose-light);
  border-radius: var(--border-radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
}
.help-cat-card:hover {
  transform: translateY(-2px);
  border-color: var(--psd-purple);
  box-shadow: var(--shadow-md);
}
.help-cat-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--psd-purple-dark);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.help-article-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 13px;
}
.help-article-list a {
  color: var(--psd-muted);
  transition: color 0.2s ease;
  display: block;
}
.help-article-list a:hover {
  color: var(--psd-purple);
}

/* 响应式适配 */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .feature-row-card {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .feature-row-meta {
    text-align: left;
  }
  .highlights-split {
    grid-template-columns: 1fr;
  }
  .steps-grid, .personas-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .tips-grid, .platform-grid, .help-category-grid {
    grid-template-columns: 1fr;
  }
  .news-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .header-inner {
    height: 64px;
  }
  .nav-links {
    display: none;
  }
  .hero-content h1 {
    font-size: 28px;
  }
  .steps-grid, .personas-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .dark-comparison-section {
    padding: 32px 20px;
  }
  .bottom-cta-section {
    padding: 40px 24px;
  }
}