/* ==========================================================================
   DuckStation 官方网站 - 子页面专属样式
   ========================================================================== */

/* ---------- 下载卡片 ---------- */
.download-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all var(--duration-base) var(--ease);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.download-card:hover {
  border-color: rgba(255, 103, 0, 0.4);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.download-card-head {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.download-card-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  flex-shrink: 0;
  color: #FFFFFF;
}

.download-card-icon svg {
  width: 32px;
  height: 32px;
}

.download-card-icon--win {
  background: linear-gradient(135deg, #0078D4, #00A4EF);
}

.download-card-icon--android {
  background: linear-gradient(135deg, #3DDC84, #075E16);
}

.download-card-icon--linux {
  background: linear-gradient(135deg, #E95420, #DD4814);
}

.download-card-icon--mac {
  background: linear-gradient(135deg, #555555, #1A1A1A);
}

.download-card-title {
  font-size: var(--fs-xl);
  font-weight: 700;
  margin: 0;
}

.download-card-meta {
  margin-bottom: var(--space-lg);
}

.meta-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px dashed var(--color-border);
  font-size: var(--fs-sm);
}

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

.meta-label {
  color: var(--color-text-muted);
}

.meta-value {
  color: var(--color-text);
  font-weight: 500;
}

.download-features {
  margin: var(--space-lg) 0;
  flex: 1;
}

.download-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 6px 0;
  font-size: var(--fs-sm);
  color: var(--color-text);
  line-height: 1.6;
}

.download-features li::before {
  content: '';
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: rgba(255, 103, 0, 0.12);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23FF6700' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
  background-size: 12px;
  background-position: center;
  background-repeat: no-repeat;
  margin-top: 2px;
}

/* ---------- 二维码展示区 ---------- */
.qr-display-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  max-width: 720px;
  margin: 0 auto var(--space-xl);
}

.qr-display-card {
  text-align: center;
  background: var(--color-surface);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: all var(--duration-base) var(--ease);
}

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

.qr-display-image {
  width: 240px;
  height: 240px;
  margin: 0 auto var(--space-md);
  background: #FFFFFF;
  padding: 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.qr-display-card h3 {
  font-size: var(--fs-lg);
  font-weight: 700;
  margin-bottom: 4px;
}

.qr-display-card p {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}

.qr-notice {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  max-width: 760px;
  margin: 0 auto;
  padding: var(--space-lg);
  background: rgba(255, 206, 0, 0.08);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: var(--color-text);
}

.qr-notice-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  color: var(--color-accent-dark);
  margin-top: 2px;
}

.qr-notice strong {
  color: var(--color-primary-dark);
}

@media (max-width: 600px) {
  .qr-display-grid {
    grid-template-columns: 1fr;
  }
  .qr-display-image {
    width: 200px;
    height: 200px;
  }
}

/* ---------- 安全提示横幅 ---------- */
.safety-banner {
  display: flex;
  align-items: flex-start;
  gap: var(--space-lg);
  padding: var(--space-xl);
  background: linear-gradient(135deg, rgba(255, 103, 0, 0.04), rgba(255, 206, 0, 0.04));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.safety-banner-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-md);
  color: #FFFFFF;
  flex-shrink: 0;
}

.safety-banner-icon svg {
  width: 28px;
  height: 28px;
}

.safety-banner h3 {
  font-size: var(--fs-lg);
  font-weight: 700;
  margin-bottom: 8px;
}

.safety-banner p {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ---------- 特性详解页（features.html） ---------- */
.feature-section {
  padding: var(--space-2xl) 0;
  border-bottom: 1px solid var(--color-border);
}

.feature-section:last-of-type {
  border-bottom: none;
}

.feature-section:nth-child(even) {
  background: var(--color-bg-alt);
}

.feature-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

.feature-detail-grid--reverse .feature-detail-text {
  order: 2;
}

.feature-detail-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(255, 103, 0, 0.08);
  color: var(--color-primary);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-md);
}

.feature-detail-title {
  font-size: var(--fs-2xl);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-md);
  letter-spacing: -0.02em;
}

.feature-detail-text p {
  font-size: var(--fs-base);
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: var(--space-md);
}

.feature-detail-list {
  margin-top: var(--space-lg);
}

.feature-detail-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 8px 0;
  font-size: var(--fs-sm);
  color: var(--color-text);
  line-height: 1.6;
}

.feature-detail-list li::before {
  content: '';
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(255, 103, 0, 0.12);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23FF6700' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
  background-size: 14px;
  background-position: center;
  background-repeat: no-repeat;
  margin-top: 1px;
}

/* 特性可视化 mockup */
.feature-mockup {
  background: var(--color-bg-dark);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  min-height: 360px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.feature-mockup::before {
  content: '';
  position: absolute;
  top: -50px;
  right: -50px;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(255, 103, 0, 0.3), transparent 70%);
  pointer-events: none;
}

.mockup-screen {
  background: #000;
  border-radius: var(--radius-md);
  padding: 16px;
  position: relative;
  height: 280px;
  overflow: hidden;
  border: 1px solid #2a2a2a;
}

.mockup-bar {
  height: 6px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: 3px;
  margin-bottom: 8px;
}

.mockup-bar--muted {
  background: #3a3a3a;
}

.mockup-bar--short { width: 50%; }
.mockup-bar--mid { width: 75%; }
.mockup-bar--long { width: 90%; }

.mockup-bar-wrap {
  position: absolute;
  bottom: 16px;
  left: 16px;
  right: 16px;
}

.mockup-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  background: rgba(0, 0, 0, 0.5);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 4px 8px;
  border-radius: 4px;
  border: 1px solid rgba(255, 206, 0, 0.3);
}

.mockup-tag--bottom {
  top: auto;
  bottom: 16px;
  right: 16px;
  left: auto;
  color: var(--color-success);
  border-color: rgba(0, 255, 0, 0.3);
  background: rgba(0, 255, 0, 0.05);
}

@media (max-width: 768px) {
  .feature-detail-grid,
  .feature-detail-grid--reverse {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  .feature-detail-grid--reverse .feature-detail-text {
    order: 0;
  }
}

/* ---------- 教程页（tutorial.html） ---------- */
.tutorial-grid {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: var(--space-2xl);
  align-items: start;
}

.tutorial-toc {
  position: sticky;
  top: 96px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

.tutorial-toc h4 {
  font-size: var(--fs-xs);
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
}

.tutorial-toc ul {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.tutorial-toc a {
  display: block;
  padding: 8px 12px;
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease);
}

.tutorial-toc a:hover {
  color: var(--color-primary);
  background: rgba(255, 103, 0, 0.06);
}

.tutorial-content {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}

.tutorial-step {
  padding: var(--space-xl) 0;
  border-bottom: 1px solid var(--color-border);
}

.tutorial-step:last-of-type {
  border-bottom: none;
}

.tutorial-step:first-of-type {
  padding-top: 0;
}

.tutorial-step-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.tutorial-step-num {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #FFFFFF;
  font-weight: 700;
  font-size: var(--fs-md);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.tutorial-step-title {
  font-size: var(--fs-xl);
  font-weight: 700;
  margin: 0;
}

.tutorial-step-body p {
  font-size: var(--fs-base);
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: var(--space-md);
}

.tutorial-callout {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: var(--space-md);
  background: rgba(255, 206, 0, 0.08);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-sm);
  margin: var(--space-md) 0;
  font-size: var(--fs-sm);
  line-height: 1.7;
}

.tutorial-callout-icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  color: var(--color-accent-dark);
}

.tutorial-callout strong {
  color: var(--color-primary-dark);
}

.tutorial-code {
  background: var(--color-bg-dark);
  color: #E0E0E0;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  padding: var(--space-md);
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin: var(--space-md) 0;
  line-height: 1.6;
}

.tutorial-code .comment {
  color: #888;
}

@media (max-width: 968px) {
  .tutorial-grid {
    grid-template-columns: 1fr;
  }
  .tutorial-toc {
    position: static;
  }
}

/* ---------- 关于页（about.html） ---------- */
.timeline {
  position: relative;
  padding-left: 32px;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--color-primary), var(--color-accent));
}

.timeline-item {
  position: relative;
  padding-bottom: var(--space-xl);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -26px;
  top: 6px;
  width: 12px;
  height: 12px;
  background: var(--color-primary);
  border: 3px solid #FFFFFF;
  border-radius: 50%;
  box-shadow: 0 0 0 2px var(--color-primary);
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-date {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: 700;
  color: var(--color-primary);
  background: rgba(255, 103, 0, 0.1);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-sm);
  letter-spacing: 0.06em;
}

.timeline-title {
  font-size: var(--fs-lg);
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.timeline-text {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.contributors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--space-md);
}

.contributor-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  text-align: center;
  transition: all var(--duration-base) var(--ease);
}

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

.contributor-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  font-weight: 700;
  font-size: var(--fs-lg);
  margin: 0 auto var(--space-sm);
}

.contributor-name {
  font-size: var(--fs-sm);
  font-weight: 700;
  margin-bottom: 4px;
}

.contributor-role {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.contact-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
  transition: all var(--duration-base) var(--ease);
}

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

.contact-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 103, 0, 0.1);
  color: var(--color-primary);
  border-radius: var(--radius-md);
  margin: 0 auto var(--space-md);
}

.contact-icon svg {
  width: 28px;
  height: 28px;
}

.contact-card h3 {
  font-size: var(--fs-md);
  font-weight: 700;
  margin-bottom: 8px;
}

.contact-card p {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-md);
}

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- FAQ 页面 ---------- */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  overflow: hidden;
  transition: all var(--duration-base) var(--ease);
}

.faq-item[open] {
  border-color: rgba(255, 103, 0, 0.4);
  box-shadow: var(--shadow-sm);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  font-size: var(--fs-md);
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  user-select: none;
  gap: 16px;
}

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

.faq-item summary::after {
  content: '';
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23FF6700' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-size: 18px;
  background-position: center;
  background-repeat: no-repeat;
  transition: transform var(--duration-base) var(--ease);
}

.faq-item[open] summary::after {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 24px 20px 24px;
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: 1.8;
}

.faq-answer p {
  margin-bottom: 12px;
}

.faq-answer strong {
  color: var(--color-text);
}

.faq-answer code {
  background: var(--color-bg-alt);
  color: var(--color-primary);
  padding: 2px 8px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.92em;
}

.faq-category-title {
  font-size: var(--fs-lg);
  font-weight: 700;
  margin: var(--space-2xl) 0 var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-primary);
  display: inline-block;
}

.faq-category-title:first-of-type {
  margin-top: 0;
}

.cta-banner .cta-banner-content p{padding: var(--space-sm) 0;}