/* ═══════════════════════════════════════════════════
   WPS Office 下载站 - 智能办公·云端协作主题
   设计：现代蓝色 + 深灰色 + 白色基础
   ═══════════════════════════════════════════════════ */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: #1f2937;
  background: #ffffff;
}

/* ═══════════════════════════════════════════════════
   导航栏 - 粘性顶部，现代风格
   ═══════════════════════════════════════════════════ */

.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #ffffff;
  border-bottom: 1px solid #e5e7eb;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.navbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 20px;
  font-weight: 700;
  color: #2563eb;
  text-decoration: none;
}

.navbar-brand-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.navbar-links {
  display: flex;
  align-items: center;
  gap: 30px;
  list-style: none;
}

.navbar-link {
  font-size: 15px;
  color: #6b7280;
  text-decoration: none;
  transition: color 0.3s ease;
  position: relative;
}

.navbar-link:hover {
  color: #2563eb;
}

.navbar-link.active {
  color: #2563eb;
  font-weight: 600;
}

.navbar-link.active::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  right: 0;
  height: 3px;
  background: #2563eb;
  border-radius: 2px;
}

.navbar-cta {
  padding: 8px 16px;
  background: #2563eb;
  color: #ffffff;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.3s ease;
}

.navbar-cta:hover {
  background: #1d4ed8;
}

/* ═══════════════════════════════════════════════════
   通用样式
   ═══════════════════════════════════════════════════ */

.wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.sec {
  padding: 80px 0;
}

.sec-alt {
  background: #f9fafb;
}

.sec-dark {
  background: #1f2937;
  color: #ffffff;
}

.sec-head {
  text-align: center;
  margin-bottom: 60px;
}

.sec-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: #2563eb;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.sec-title {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 16px;
  color: #1f2937;
}

.sec-alt .sec-title {
  color: #1f2937;
}

.sec-dark .sec-title {
  color: #ffffff;
}

.sec-sub {
  font-size: 18px;
  color: #6b7280;
  max-width: 600px;
  margin: 0 auto;
}

.sec-dark .sec-sub {
  color: #d1d5db;
}

/* ═══════════════════════════════════════════════════
   按钮
   ═══════════════════════════════════════════════════ */

.btn {
  padding: 12px 24px;
  border: none;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-primary {
  background: #2563eb;
  color: #ffffff;
}

.btn-primary:hover {
  background: #1d4ed8;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-outline {
  background: transparent;
  color: #2563eb;
  border: 2px solid #2563eb;
}

.btn-outline:hover {
  background: #eff6ff;
}

.btn-white {
  background: #ffffff;
  color: #2563eb;
  border: 2px solid #e5e7eb;
}

.btn-white:hover {
  border-color: #2563eb;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.btn-lg {
  padding: 16px 32px;
  font-size: 16px;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 14px;
}

/* ═══════════════════════════════════════════════════
   Hero 部分
   ═══════════════════════════════════════════════════ */

.hero {
  background: linear-gradient(135deg, #1f2937 0%, #374151 100%);
  color: #ffffff;
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-text h1 {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 24px;
  line-height: 1.2;
}

.hero-text p {
  font-size: 18px;
  color: #d1d5db;
  margin-bottom: 32px;
  line-height: 1.6;
}

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

.hero-badges {
  display: flex;
  gap: 12px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.hero-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: #d1d5db;
}

.hero-badge::before {
  content: '✓';
  color: #10b981;
  font-weight: 700;
}

.hero-visual {
  position: relative;
  height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-mockup {
  width: 100%;
  max-width: 350px;
  aspect-ratio: 9/16;
  background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
  border-radius: 20px;
  padding: 12px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  display: flex;
  flex-direction: column;
}

.mockup-header {
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  margin-bottom: 12px;
}

.mockup-content {
  flex: 1;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  padding: 12px;
  gap: 8px;
}

.mockup-line {
  height: 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}

.mockup-line:nth-child(1) {
  width: 100%;
}

.mockup-line:nth-child(2) {
  width: 85%;
}

.mockup-line:nth-child(3) {
  width: 70%;
}

/* ═══════════════════════════════════════════════════
   特性卡片网格
   ═══════════════════════════════════════════════════ */

.feat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.feat-card {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 32px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.feat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: #2563eb;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.feat-card:hover {
  border-color: #2563eb;
  box-shadow: 0 12px 24px rgba(37, 99, 235, 0.1);
  transform: translateY(-4px);
}

.feat-card:hover::before {
  transform: scaleX(1);
}

.feat-icon {
  width: 48px;
  height: 48px;
  background: #eff6ff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: #2563eb;
}

.feat-name {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
  color: #1f2937;
}

.feat-desc {
  font-size: 15px;
  color: #6b7280;
  line-height: 1.6;
}

/* ═══════════════════════════════════════════════════
   平台卡片
   ═══════════════════════════════════════════════════ */

.plat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.plat-card {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 24px;
  text-align: center;
  transition: all 0.3s ease;
}

.plat-card:hover {
  border-color: #2563eb;
  box-shadow: 0 8px 16px rgba(37, 99, 235, 0.1);
  transform: translateY(-4px);
}

.plat-card.featured {
  border-color: #2563eb;
  background: linear-gradient(135deg, #eff6ff 0%, #ffffff 100%);
  position: relative;
}

.plat-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: #2563eb;
  color: #ffffff;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.plat-icon {
  width: 64px;
  height: 64px;
  background: #f3f4f6;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 32px;
}

.plat-name {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: #1f2937;
}

.plat-ver {
  font-size: 13px;
  color: #9ca3af;
  margin-bottom: 16px;
}

.plat-desc {
  font-size: 14px;
  color: #6b7280;
  margin-bottom: 20px;
  line-height: 1.5;
}

.plat-btn {
  width: 100%;
}

/* ═══════════════════════════════════════════════════
   深度特性行
   ═══════════════════════════════════════════════════ */

.deep-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 80px;
}

.deep-row.flip {
  direction: rtl;
}

.deep-row.flip > * {
  direction: ltr;
}

.deep-info {
  padding: 20px 0;
}

.deep-badge {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: #2563eb;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.deep-title {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 16px;
  color: #1f2937;
}

.deep-desc {
  font-size: 16px;
  color: #6b7280;
  margin-bottom: 24px;
  line-height: 1.7;
}

.deep-list {
  list-style: none;
  margin-bottom: 24px;
}

.deep-list li {
  font-size: 15px;
  color: #6b7280;
  margin-bottom: 12px;
  padding-left: 28px;
  position: relative;
}

.deep-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: #2563eb;
  font-weight: 600;
}

.deep-visual {
  background: linear-gradient(135deg, #eff6ff 0%, #f0f9ff 100%);
  border-radius: 12px;
  padding: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
}

.dv-chart {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.dv-bar-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.dv-bar-label {
  font-size: 14px;
  color: #6b7280;
  min-width: 80px;
}

.dv-bar-track {
  flex: 1;
  height: 8px;
  background: #e5e7eb;
  border-radius: 4px;
  overflow: hidden;
}

.dv-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #2563eb 0%, #1d4ed8 100%);
  border-radius: 4px;
}

.dv-bar-val {
  font-size: 14px;
  font-weight: 600;
  color: #2563eb;
  min-width: 40px;
  text-align: right;
}

/* ═══════════════════════════════════════════════════
   用户评价
   ═══════════════════════════════════════════════════ */

.rev-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.rev-card {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 28px;
  transition: all 0.3s ease;
}

.rev-card:hover {
  border-color: #2563eb;
  box-shadow: 0 12px 24px rgba(37, 99, 235, 0.1);
  transform: translateY(-4px);
}

.rev-stars {
  display: flex;
  gap: 4px;
  margin-bottom: 12px;
}

.rev-star {
  color: #fbbf24;
  font-size: 16px;
}

.rev-text {
  font-size: 15px;
  color: #6b7280;
  margin-bottom: 16px;
  line-height: 1.6;
  font-style: italic;
}

.rev-footer {
  display: flex;
  align-items: center;
  gap: 12px;
}

.rev-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 600;
  font-size: 16px;
}

.rev-avatar.av2 {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.rev-avatar.av3 {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.rev-avatar.av4 {
  background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
}

.rev-avatar.av5 {
  background: linear-gradient(135deg, #ec4899 0%, #db2777 100%);
}

.rev-avatar.av6 {
  background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
}

.rev-info {
  flex: 1;
}

.rev-name {
  font-size: 14px;
  font-weight: 600;
  color: #1f2937;
}

.rev-role {
  font-size: 13px;
  color: #9ca3af;
}

/* ═══════════════════════════════════════════════════
   对比表
   ═══════════════════════════════════════════════════ */

.cmp-wrap {
  overflow-x: auto;
}

.cmp-table {
  width: 100%;
  border-collapse: collapse;
  background: #ffffff;
}

.cmp-table th,
.cmp-table td {
  padding: 16px;
  text-align: left;
  border-bottom: 1px solid #e5e7eb;
}

.cmp-table th {
  background: #f9fafb;
  font-weight: 600;
  color: #1f2937;
  font-size: 14px;
}

.cmp-table td {
  font-size: 14px;
  color: #6b7280;
}

.cmp-table tr:hover {
  background: #f9fafb;
}

.cmp-hl {
  font-weight: 600;
  color: #2563eb;
}

.yes::before {
  content: '✓';
  color: #10b981;
  font-weight: 700;
  margin-right: 4px;
}

.no::before {
  content: '✗';
  color: #ef4444;
  font-weight: 700;
  margin-right: 4px;
}

/* ═══════════════════════════════════════════════════
   FAQ 手风琴
   ═══════════════════════════════════════════════════ */

.faq-list {
  list-style: none;
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  margin-bottom: 12px;
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item:hover {
  border-color: #2563eb;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.1);
}

.faq-question {
  padding: 20px;
  background: #ffffff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 600;
  color: #1f2937;
  user-select: none;
  transition: background 0.3s ease;
}

.faq-item:hover .faq-question {
  background: #f9fafb;
}

.faq-chevron {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #2563eb;
  transition: transform 0.3s ease;
}

.faq-item.open .faq-chevron {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-item.open .faq-answer {
  max-height: 500px;
}

.faq-answer-inner {
  padding: 0 20px 20px;
  font-size: 15px;
  color: #6b7280;
  line-height: 1.7;
  background: #f9fafb;
}

/* ═══════════════════════════════════════════════════
   CTA 横幅
   ═══════════════════════════════════════════════════ */

.cta-banner {
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  color: #ffffff;
  padding: 60px 20px;
  border-radius: 12px;
  text-align: center;
}

.cta-title {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-desc {
  font-size: 16px;
  color: #dbeafe;
  margin-bottom: 32px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

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

/* ═══════════════════════════════════════════════════
   下载页面
   ═══════════════════════════════════════════════════ */

.dl-hero {
  background: linear-gradient(135deg, #1f2937 0%, #374151 100%);
  color: #ffffff;
  padding: 60px 0;
  text-align: center;
}

.dl-hero-title {
  font-size: 40px;
  font-weight: 700;
  margin-bottom: 16px;
}

.dl-hero-sub {
  font-size: 18px;
  color: #d1d5db;
  margin-bottom: 32px;
}

.dl-main {
  background: #ffffff;
  border: 2px solid #e5e7eb;
  border-radius: 12px;
  padding: 40px;
  margin-bottom: 40px;
  text-align: center;
  transition: all 0.3s ease;
}

.dl-main:hover {
  border-color: #2563eb;
  box-shadow: 0 12px 24px rgba(37, 99, 235, 0.1);
}

.dl-main-icon {
  width: 80px;
  height: 80px;
  background: #eff6ff;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 40px;
}

.dl-main-name {
  font-size: 24px;
  font-weight: 700;
  color: #1f2937;
  margin-bottom: 8px;
}

.dl-meta {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.dl-meta-item {
  font-size: 14px;
  color: #6b7280;
}

.dl-specs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
  text-align: left;
}

.dl-spec {
  padding: 16px;
  background: #f9fafb;
  border-radius: 8px;
}

.dl-spec-label {
  font-size: 12px;
  color: #9ca3af;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.dl-spec-val {
  font-size: 16px;
  font-weight: 600;
  color: #1f2937;
}

.dl-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.dl-actions .btn {
  min-width: 160px;
}

/* ═══════════════════════════════════════════════════
   安装指南
   ═══════════════════════════════════════════════════ */

.guide-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-bottom: 60px;
}

.guide-col-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 24px;
  color: #1f2937;
  display: flex;
  align-items: center;
  gap: 8px;
}

.guide-col-dot {
  width: 8px;
  height: 8px;
  background: #2563eb;
  border-radius: 50%;
}

.guide-steps {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.gstep {
  display: flex;
  gap: 16px;
}

.gstep-num {
  width: 32px;
  height: 32px;
  background: #eff6ff;
  border: 2px solid #2563eb;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #2563eb;
  flex-shrink: 0;
}

.gstep-body {
  flex: 1;
}

.gstep-title {
  font-size: 15px;
  font-weight: 600;
  color: #1f2937;
  margin-bottom: 4px;
}

.gstep-desc {
  font-size: 14px;
  color: #6b7280;
}

/* ═══════════════════════════════════════════════════
   系统要求
   ═══════════════════════════════════════════════════ */

.req-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.req-card {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 24px;
  text-align: center;
}

.req-icon {
  width: 48px;
  height: 48px;
  background: #eff6ff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 12px;
  font-size: 24px;
}

.req-title {
  font-size: 15px;
  font-weight: 600;
  color: #1f2937;
  margin-bottom: 8px;
}

.req-val {
  font-size: 14px;
  color: #6b7280;
}

/* ═══════════════════════════════════════════════════
   版本日志
   ═══════════════════════════════════════════════════ */

.ver-list {
  list-style: none;
  position: relative;
  padding-left: 40px;
}

.ver-list::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: #e5e7eb;
}

.ver-item {
  margin-bottom: 32px;
  position: relative;
}

.ver-item::before {
  content: '';
  position: absolute;
  left: -32px;
  top: 4px;
  width: 12px;
  height: 12px;
  background: #2563eb;
  border: 3px solid #ffffff;
  border-radius: 50%;
  box-shadow: 0 0 0 2px #2563eb;
}

.ver-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.ver-num {
  font-size: 16px;
  font-weight: 700;
  color: #1f2937;
}

.ver-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 8px;
  background: #eff6ff;
  color: #2563eb;
  border-radius: 4px;
}

.ver-date {
  font-size: 13px;
  color: #9ca3af;
}

.ver-desc {
  font-size: 14px;
  color: #6b7280;
  line-height: 1.6;
}

/* ═══════════════════════════════════════════════════
   安全横幅
   ═══════════════════════════════════════════════════ */

.sec-banner {
  background: #f0fdf4;
  border-left: 4px solid #10b981;
  border-radius: 8px;
  padding: 20px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 40px;
}

.sec-banner-icon {
  width: 24px;
  height: 24px;
  color: #10b981;
  flex-shrink: 0;
}

.sec-banner-text {
  flex: 1;
}

.sec-banner-title {
  font-size: 15px;
  font-weight: 600;
  color: #065f46;
  margin-bottom: 4px;
}

.sec-banner-desc {
  font-size: 14px;
  color: #047857;
  line-height: 1.5;
}

/* ═══════════════════════════════════════════════════
   文章页面
   ═══════════════════════════════════════════════════ */

.art-hero {
  background: linear-gradient(135deg, #1f2937 0%, #374151 100%);
  color: #ffffff;
  padding: 60px 0;
  text-align: center;
}

.art-hero-title {
  font-size: 40px;
  font-weight: 700;
  margin-bottom: 16px;
}

.art-hero-sub {
  font-size: 18px;
  color: #d1d5db;
}

.kw-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-top: 24px;
}

.kw {
  display: inline-block;
  padding: 6px 12px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  font-size: 13px;
  color: #dbeafe;
}

.art-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 40px;
  margin-top: 40px;
}

.art-body {
  font-size: 16px;
  color: #6b7280;
  line-height: 1.8;
}

.art-body h2 {
  font-size: 24px;
  font-weight: 700;
  color: #1f2937;
  margin: 40px 0 20px;
}

.art-body h3 {
  font-size: 18px;
  font-weight: 600;
  color: #1f2937;
  margin: 28px 0 16px;
}

.art-body p {
  margin-bottom: 16px;
}

.art-body ul,
.art-body ol {
  margin-left: 24px;
  margin-bottom: 16px;
}

.art-body li {
  margin-bottom: 8px;
}

.art-body strong {
  color: #1f2937;
  font-weight: 600;
}

.inline-cta {
  background: #eff6ff;
  border-left: 4px solid #2563eb;
  border-radius: 8px;
  padding: 24px;
  margin: 32px 0;
  text-align: center;
}

.inline-cta-title {
  font-size: 18px;
  font-weight: 700;
  color: #1f2937;
  margin-bottom: 8px;
}

.inline-cta-desc {
  font-size: 15px;
  color: #6b7280;
  margin-bottom: 16px;
}

.inline-cta .btn {
  margin: 0 auto;
}

/* ═══════════════════════════════════════════════════
   侧边栏
   ═══════════════════════════════════════════════════ */

.sidebar {
  position: sticky;
  top: 80px;
  height: fit-content;
}

.sbox {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 24px;
}

.sbox-title {
  font-size: 15px;
  font-weight: 700;
  color: #1f2937;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid #e5e7eb;
}

.sdl-btn {
  width: 100%;
  margin-bottom: 12px;
  text-align: left;
  padding: 12px 16px;
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 12px;
}

.sdl-btn:hover {
  background: #eff6ff;
  border-color: #2563eb;
}

.sdl-btn-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  color: #2563eb;
}

.sdl-btn-info {
  flex: 1;
}

.sdl-btn-name {
  font-size: 14px;
  font-weight: 600;
  color: #1f2937;
}

.sdl-btn-ver {
  font-size: 12px;
  color: #9ca3af;
}

.stoc {
  list-style: none;
}

.stoc li {
  margin-bottom: 12px;
}

.stoc a {
  font-size: 14px;
  color: #2563eb;
  text-decoration: none;
  transition: color 0.3s ease;
}

.stoc a:hover {
  color: #1d4ed8;
  text-decoration: underline;
}

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

.sstat-item {
  display: flex;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid #e5e7eb;
}

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

.sstat-lbl {
  font-size: 13px;
  color: #6b7280;
}

.sstat-num {
  font-size: 14px;
  font-weight: 700;
  color: #2563eb;
}

.side-security {
  background: #f0fdf4;
  border-radius: 8px;
  padding: 16px;
  font-size: 13px;
  color: #047857;
  line-height: 1.6;
}

/* ═══════════════════════════════════════════════════
   页脚
   ═══════════════════════════════════════════════════ */

.site-footer {
  background: #1f2937;
  color: #d1d5db;
  padding: 40px 0 20px;
  border-top: 1px solid #374151;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.footer-brand {
  font-size: 18px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 8px;
}

.footer-security {
  font-size: 14px;
  color: #d1d5db;
  margin-bottom: 16px;
  line-height: 1.6;
}

.footer-note {
  font-size: 13px;
  color: #9ca3af;
  padding-top: 16px;
  border-top: 1px solid #374151;
}

/* ═══════════════════════════════════════════════════
   响应式设计
   ═══════════════════════════════════════════════════ */

@media (max-width: 768px) {
  .navbar-links {
    display: none;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-text h1 {
    font-size: 32px;
  }

  .hero-visual {
    height: 300px;
  }

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

  .deep-row {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

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

  .sidebar {
    position: static;
  }

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

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

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

/* ═══════════════════════════════════════════════════
   动画
   ═══════════════════════════════════════════════════ */

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}