/* OuO云机场 Official Theme - Teal & Clean Minimalist Design */
:root {
  --primary: #39a9a0;
  --primary-dark: #2c867f;
  --primary-light: #e0f2f1;
  --primary-gradient: linear-gradient(135deg, #4db6ac 0%, #26a69a 100%);
  --secondary: #00bcd4;
  --accent: #ff7043;
  --bg-main: #f7faf9;
  --bg-card: #ffffff;
  --text-main: #2d3748;
  --text-muted: #718096;
  --border-color: #e2e8f0;
  --shadow-sm: 0 2px 8px rgba(57, 169, 160, 0.08);
  --shadow-md: 0 8px 24px rgba(57, 169, 160, 0.12);
  --shadow-lg: 0 16px 36px rgba(57, 169, 160, 0.16);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
}

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

html {
  scroll-behavior: smooth;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  font-size: 16px;
  color: var(--text-main);
  background-color: var(--bg-main);
}

body {
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: all 0.25s ease;
}

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

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

/* Header & Navigation */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--primary-light);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-main);
}

.brand-logo {
  width: 42px;
  height: 42px;
  object-fit: contain;
  border-radius: 10px;
}

.brand-text {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  font-weight: 500;
  color: var(--text-main);
  font-size: 0.95rem;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  font-weight: 600;
  border-radius: 30px;
  cursor: pointer;
  border: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  gap: 8px;
  font-size: 0.95rem;
}

.btn-primary {
  background: var(--primary-gradient);
  color: #ffffff !important;
  box-shadow: 0 4px 14px rgba(57, 169, 160, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(57, 169, 160, 0.45);
}

.btn-outline {
  background: transparent;
  color: var(--primary) !important;
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 6px 16px;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 14px 36px;
  font-size: 1.1rem;
}

.mobile-toggle {
  display: none;
  font-size: 1.5rem;
  background: none;
  border: none;
  color: var(--text-main);
  cursor: pointer;
}

/* Hero Section */
.hero {
  padding: 80px 0 60px;
  background: linear-gradient(180deg, rgba(224, 242, 241, 0.5) 0%, rgba(247, 250, 249, 0) 100%);
  text-align: center;
  position: relative;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background-color: var(--primary-light);
  color: var(--primary-dark);
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 20px;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 20px;
  color: #1a202c;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 760px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-features-bar {
  display: flex;
  justify-content: center;
  gap: 30px;
  flex-wrap: wrap;
  margin-top: 30px;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.hero-feature-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-feature-item i {
  color: var(--primary);
}

/* Section Common */
.section {
  padding: 70px 0;
}

.section-title {
  text-align: center;
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #1a202c;
}

.section-subtitle {
  text-align: center;
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto 48px;
}

/* Feature Cards Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
}

.feature-card {
  background: var(--bg-card);
  padding: 32px 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 10px;
  color: #2d3748;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Pricing Section */
.pricing {
  background: linear-gradient(180deg, rgba(224, 242, 241, 0.2) 0%, rgba(255, 255, 255, 1) 100%);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
  align-items: stretch;
}

.price-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 2px solid var(--border-color);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.3s ease;
}

.price-card:hover {
  transform: translateY(-8px);
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
}

.price-card.popular {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.popular-badge {
  position: absolute;
  top: -14px;
  right: 24px;
  background: var(--primary-gradient);
  color: white;
  padding: 4px 14px;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.price-header h3 {
  font-size: 1.4rem;
  color: #1a202c;
  margin-bottom: 8px;
}

.price-header p {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 20px;
}

.price-amount {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--primary-dark);
  display: flex;
  align-items: baseline;
  margin-bottom: 24px;
}

.price-amount span {
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--text-muted);
  margin-left: 4px;
}

.price-features {
  list-style: none;
  margin-bottom: 30px;
  flex-grow: 1;
}

.price-features li {
  padding: 10px 0;
  border-bottom: 1px dashed var(--border-color);
  font-size: 0.9rem;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 10px;
}

.price-features li i {
  color: var(--primary);
}

/* Speed Test Table */
.speed-table-container {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  overflow-x: auto;
}

.speed-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.speed-table th {
  background-color: var(--primary-light);
  color: var(--primary-dark);
  padding: 16px 20px;
  font-weight: 700;
}

.speed-table td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border-color);
}

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

.status-tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 600;
  background-color: #e6fffa;
  color: #234e52;
}

/* Coupon Section */
.coupon-box {
  background: var(--primary-gradient);
  color: white;
  border-radius: var(--radius-lg);
  padding: 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  box-shadow: var(--shadow-md);
}

.coupon-info h3 {
  font-size: 1.8rem;
  margin-bottom: 8px;
}

.coupon-info p {
  opacity: 0.9;
  font-size: 1rem;
}

.coupon-code-wrapper {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.2);
  border: 2px dashed rgba(255, 255, 255, 0.6);
  padding: 8px 16px;
  border-radius: var(--radius-md);
  gap: 16px;
}

.coupon-code-text {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: 2px;
  font-family: monospace;
}

/* Articles Section */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 28px;
}

.article-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
}

.article-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}

.article-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.article-tag {
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 10px;
  font-weight: 600;
}

.article-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.4;
}

.article-title a {
  color: #2d3748;
}

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

.article-excerpt {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
  padding-top: 14px;
}

/* Reviews Section */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  padding: 28px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.review-stars {
  color: #ffb400;
  margin-bottom: 12px;
  font-size: 1.1rem;
}

.review-text {
  font-size: 0.95rem;
  color: var(--text-main);
  line-height: 1.6;
  margin-bottom: 20px;
  font-style: italic;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 12px;
}

.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary-gradient);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.review-user-info h4 {
  font-size: 0.95rem;
  color: #2d3748;
}

.review-user-info p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* FAQ Accordion */
.faq-list {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.faq-question {
  padding: 20px 24px;
  font-weight: 700;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
  background: var(--bg-card);
  transition: background-color 0.2s ease;
}

.faq-question:hover {
  background: var(--primary-light);
}

.faq-answer {
  padding: 0 24px 20px;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  display: none;
}

.faq-item.active .faq-answer {
  display: block;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-icon {
  transition: transform 0.3s ease;
  color: var(--primary);
}

/* Footer & PBN Links */
footer.site-footer {
  background-color: #1a202c;
  color: #a0aec0;
  padding: 50px 0 30px;
  font-size: 0.9rem;
  border-top: 4px solid var(--primary);
}

.footer-top {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-col h4 {
  color: #ffffff;
  font-size: 1.1rem;
  margin-bottom: 16px;
}

.footer-col p {
  line-height: 1.6;
}

.footer-links-list {
  list-style: none;
}

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

.footer-links-list a {
  color: #a0aec0;
}

.footer-links-list a:hover {
  color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid #2d3748;
  padding-top: 24px;
  text-align: center;
}

/* Low-profile SEO Friend Links / PBN Pipe Section */
.footer-friend-links {
  margin-top: 16px;
  padding-top: 12px;
  text-align: center;
  font-size: 13px;
  color: #718096;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-friend-links span {
  opacity: 0.7;
}

.footer-friend-links a {
  color: #a0aec0;
  text-decoration: none;
  font-size: 13px;
  transition: color 0.2s ease;
}

.footer-friend-links a:hover {
  color: var(--primary);
}

/* Article Detail Page Layout */
.article-page {
  padding: 40px 0 80px;
}

.article-container {
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-card);
  padding: 40px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

.article-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 24px;
  margin-bottom: 30px;
}

.article-header h1 {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.3;
  color: #1a202c;
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  gap: 20px;
  color: var(--text-muted);
  font-size: 0.88rem;
  flex-wrap: wrap;
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #2d3748;
}

.article-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 36px 0 16px;
  color: #1a202c;
  border-left: 4px solid var(--primary);
  padding-left: 12px;
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 24px 0 12px;
  color: #2d3748;
}

.article-content p {
  margin-bottom: 20px;
}

.article-content ul, .article-content ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

.article-content li {
  margin-bottom: 8px;
}

.article-cta-box {
  background: var(--primary-light);
  border: 1px solid var(--primary);
  border-radius: var(--radius-md);
  padding: 24px;
  margin: 36px 0;
  text-align: center;
}

.article-cta-box h3 {
  color: var(--primary-dark);
  margin-bottom: 10px;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2.1rem;
  }
  .nav-links {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: white;
    padding: 20px;
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid var(--border-color);
  }
  .coupon-box {
    flex-direction: column;
    text-align: center;
  }
  .article-container {
    padding: 20px;
  }
}

/* ==========================================================================
   Download Modal & Download Center Styles
   ========================================================================== */

/* Modal Overlay & Container */
.dl-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.dl-modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.dl-modal-window {
  position: relative;
  width: 100%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  background-color: #ffffff;
  border-radius: var(--radius-lg);
  padding: 32px 28px 24px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(57, 169, 160, 0.25);
  transform: scale(0.95);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.dl-modal-overlay.active .dl-modal-window {
  transform: scale(1);
}

body.modal-open {
  overflow: hidden !important;
}

/* Close Button */
.dl-modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: #f1f5f9;
  color: #64748b;
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.dl-modal-close:hover,
.dl-modal-close:focus-visible {
  background: #e2e8f0;
  color: #0f172a;
  outline: 2px solid var(--primary);
}

/* Modal Headers */
.dl-modal-header {
  text-align: center;
  margin-bottom: 20px;
}

.dl-modal-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: var(--primary-light);
  color: var(--primary-dark);
  font-size: 0.82rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 10px;
}

.dl-modal-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.35;
  margin-bottom: 8px;
}

.dl-modal-subtitle {
  font-size: 0.95rem;
  color: var(--primary-dark);
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 6px;
}

.dl-modal-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Selected Plan Hint Box */
.dl-plan-hint {
  display: none;
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  color: #166534;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 16px;
  text-align: center;
}

.dl-plan-hint.active {
  display: block;
}

/* Platform Cards Grid */
.dl-platforms-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.dl-platform-card {
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  background: #ffffff;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-align: center;
  transition: all 0.2s ease;
  position: relative;
}

.dl-platform-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.dl-platform-card.highlight {
  border-color: var(--primary);
  background: #fafffe;
  box-shadow: 0 0 0 2px rgba(57, 169, 160, 0.2);
}

.dl-platform-card.highlight::after {
  content: "当前设备推荐";
  position: absolute;
  top: -9px;
  right: 12px;
  background: var(--primary);
  color: #ffffff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 1px 8px;
  border-radius: 10px;
}

.dl-platform-icon {
  font-size: 1.8rem;
  margin-bottom: 8px;
  color: var(--primary);
}

.dl-platform-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 4px;
}

.dl-platform-note {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.dl-platform-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 100%;
  padding: 8px 12px;
  font-size: 0.86rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  background: var(--primary-gradient);
  color: #ffffff;
  transition: opacity 0.2s ease;
}

.dl-platform-btn:hover {
  opacity: 0.92;
  color: #ffffff;
}

/* Steps Guide */
.dl-steps-guide {
  background: #f8fafc;
  border-radius: var(--radius-md);
  padding: 14px 16px;
  margin-bottom: 18px;
  border: 1px solid #e2e8f0;
}

.dl-steps-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.dl-steps-list {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.dl-step-item {
  flex: 1;
  font-size: 0.76rem;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.35;
  position: relative;
}

.dl-step-number {
  display: inline-block;
  width: 18px;
  height: 18px;
  line-height: 18px;
  border-radius: 50%;
  background: var(--primary);
  color: #ffffff;
  font-size: 0.7rem;
  font-weight: 700;
  margin-bottom: 4px;
}

/* Modal Footer */
.dl-modal-footer {
  text-align: center;
  padding-top: 12px;
  border-top: 1px solid var(--border-color);
  font-size: 0.82rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.dl-center-link {
  color: var(--primary);
  font-weight: 600;
  text-decoration: underline;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.dl-center-link:hover {
  color: var(--primary-dark);
}

/* Download Page Specific Layout */
.dl-page-hero {
  padding: 48px 0 32px;
  text-align: center;
}

.dl-device-detected-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #ffffff;
  border: 1.5px solid var(--primary);
  color: var(--primary-dark);
  font-size: 0.88rem;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 30px;
  box-shadow: var(--shadow-sm);
  margin: 18px 0 28px;
}

.dl-grid-full {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.dl-card-full {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  border: 1.5px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-align: center;
  transition: all 0.25s ease;
  position: relative;
}

.dl-card-full:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.dl-card-full.highlight {
  border-color: var(--primary);
  background: #fcfffe;
  box-shadow: 0 0 0 2px rgba(57, 169, 160, 0.25), var(--shadow-md);
}

.dl-card-full.highlight::before {
  content: "推荐当前系统";
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 12px;
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
}

.dl-full-icon {
  font-size: 2.4rem;
  color: var(--primary);
  margin-bottom: 12px;
}

.dl-full-features {
  list-style: none;
  padding: 0;
  margin: 16px 0 20px;
  text-align: left;
  font-size: 0.84rem;
  color: var(--text-muted);
}

.dl-full-features li {
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.dl-full-features li i {
  color: var(--primary);
  font-size: 0.8rem;
}

.dl-guide-section {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  margin-bottom: 40px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.dl-guide-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.dl-guide-card {
  background: var(--bg-main);
  border-radius: var(--radius-md);
  padding: 20px 16px;
  border-top: 4px solid var(--primary);
}

.dl-guide-step-no {
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.dl-guide-card h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.dl-guide-card p {
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.5;
}

@media (max-width: 992px) {
  .dl-grid-full {
    grid-template-columns: repeat(2, 1fr);
  }
  .dl-guide-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 576px) {
  .dl-platforms-grid {
    grid-template-columns: 1fr;
  }
  .dl-grid-full {
    grid-template-columns: 1fr;
  }
  .dl-guide-grid {
    grid-template-columns: 1fr;
  }
  .dl-steps-list {
    flex-direction: column;
    text-align: left;
    gap: 10px;
  }
  .dl-step-item {
    text-align: left;
    display: flex;
    align-items: center;
    gap: 8px;
  }
  .dl-step-number {
    margin-bottom: 0;
  }
  .dl-modal-window {
    padding: 24px 16px 18px;
  }
}