/* ═══════════════════════════════════════════════
   Chrome 安全下载站 - 组件样式
   ═══════════════════════════════════════════════ */

/* ── 按钮 ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 500;
  font-family: var(--font-cn);
  border: none;
  border-radius: var(--btn-radius);
  cursor: pointer;
  transition: all 0.25s ease;
  text-decoration: none;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--gradient-btn);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(5, 150, 105, 0.2);
}

.btn-primary:hover {
  filter: brightness(1.08);
  box-shadow: var(--shadow-btn-hover);
  transform: translateY(-1px);
  text-decoration: none;
}

.btn-secondary {
  background: #ffffff;
  color: var(--color-forest);
  border: 2px solid var(--color-forest);
}

.btn-secondary:hover {
  background: var(--color-forest);
  color: #ffffff;
  text-decoration: none;
}

.btn-white {
  background: #ffffff;
  color: var(--color-forest);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.btn-white:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  transform: translateY(-1px);
  text-decoration: none;
}

.btn-lg {
  padding: 16px 40px;
  font-size: 1.125rem;
}

/* ── 卡片 ── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  padding: 32px;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-border-hover);
}

.card-icon {
  width: 64px;
  height: 64px;
  background: var(--bg-secondary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--color-forest);
  transition: transform 0.3s ease;
}

.card:hover .card-icon {
  transform: scale(1.1);
}

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

.card h3 {
  color: var(--color-forest);
  margin-bottom: 12px;
  font-size: 1.25rem;
}

.card p {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  line-height: 1.7;
}

/* ── 文章卡片 ── */
.article-card {
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  padding: 32px;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
}

.article-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-border-hover);
}

.article-card h3 {
  color: var(--color-forest);
  margin-bottom: 12px;
  font-size: 1.25rem;
}

.article-card p {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  line-height: 1.8;
}

/* ── 导航栏 ── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  z-index: 100;
  transition: all 0.3s ease;
  background: transparent;
}

.navbar.scrolled {
  background: #ffffff;
  box-shadow: var(--shadow-nav);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.navbar-brand {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-forest);
  text-decoration: none;
}

.navbar-brand:hover {
  text-decoration: none;
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.navbar-nav a {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
  padding: 8px 0;
  position: relative;
  transition: color 0.2s ease;
}

.navbar-nav a:hover {
  color: var(--color-forest);
  text-decoration: none;
}

.navbar-nav a.active {
  color: var(--color-forest);
  font-weight: 600;
}

.navbar-nav a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-forest);
  border-radius: 2px;
}

/* ── 移动端菜单 ── */
.navbar-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--color-forest);
}

.navbar-mobile {
  display: none;
  position: absolute;
  top: 64px;
  left: 0;
  right: 0;
  background: #ffffff;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  padding: 16px 0;
  list-style: none;
}

.navbar-mobile.open {
  display: block;
}

.navbar-mobile li a {
  display: block;
  padding: 12px 24px;
  color: var(--color-text-secondary);
  font-weight: 500;
  border-left: 3px solid transparent;
  text-decoration: none;
  transition: all 0.2s ease;
}

.navbar-mobile li a:hover,
.navbar-mobile li a.active {
  color: var(--color-forest);
  border-left-color: var(--color-emerald);
  background: var(--bg-secondary);
  text-decoration: none;
}

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

  .navbar-toggle {
    display: block;
  }
}

/* ── 折叠面板 ── */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border-left: 3px solid var(--color-emerald);
  border-radius: 12px;
  margin-bottom: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  user-select: none;
  color: var(--color-forest);
  font-weight: 600;
  font-size: 1rem;
  transition: background 0.2s ease;
}

.faq-question:hover {
  background: rgba(5, 150, 105, 0.03);
}

.faq-icon {
  width: 20px;
  height: 20px;
  color: var(--color-forest);
  transition: transform 0.3s ease;
  flex-shrink: 0;
  margin-left: 12px;
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease, opacity 0.3s ease;
  opacity: 0;
  padding: 0 24px;
}

.faq-item.open .faq-answer {
  max-height: 500px;
  padding: 0 24px 20px;
  opacity: 1;
}

.faq-answer p {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* ── 标签切换 ── */
.tab-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  border-bottom: 2px solid var(--color-border);
  margin-bottom: 32px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.tab-item {
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text-muted);
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  cursor: pointer;
  transition: all 0.25s ease;
  font-family: var(--font-cn);
  white-space: nowrap;
}

.tab-item:hover {
  color: var(--color-text-secondary);
}

.tab-item.active {
  color: var(--color-forest);
  font-weight: 600;
  border-bottom-color: var(--color-forest);
}

@media (max-width: 768px) {
  .tab-bar {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .tab-item {
    padding: 12px 20px;
    font-size: 0.9375rem;
  }
}

/* ── 标签内容面板 ── */
.tab-panel {
  display: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.tab-panel.active {
  display: block;
  opacity: 1;
}

/* ── 步骤编号 ── */
.step-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.step-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 28px 32px;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
}

.step-item:hover {
  border-color: var(--color-border-hover);
}

.step-number {
  width: 40px;
  height: 40px;
  min-width: 40px;
  background: var(--gradient-btn);
  color: #ffffff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  font-family: var(--font-en);
  transition: transform 0.5s ease-in-out;
}

.step-item:hover .step-number {
  transform: rotate(360deg);
}

.step-content h4 {
  color: var(--color-forest);
  margin-bottom: 8px;
  font-size: 1.125rem;
}

.step-content p {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* ── 步骤卡片（教程用） ── */
.tutorial-step {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: var(--bg-card);
  border-left: 3px solid var(--color-emerald);
  border-radius: 12px;
  padding: 24px 28px;
  box-shadow: var(--shadow-card);
  margin-bottom: 16px;
  transition: all 0.3s ease;
}

.tutorial-step:hover {
  border-color: var(--color-forest);
  transform: translateX(4px);
}

.tutorial-step .step-number {
  width: 36px;
  height: 36px;
  min-width: 36px;
  font-size: 0.9375rem;
}

.tutorial-step p {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.tutorial-step code {
  background: #f1f5f9;
  padding: 2px 8px;
  border-radius: 4px;
  font-family: "SF Mono", "Fira Code", monospace;
  font-size: 0.875rem;
  color: var(--color-forest);
}

/* ── 徽章 ── */
.badge {
  display: inline-block;
  padding: 4px 14px;
  background: var(--color-emerald);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 999px;
  letter-spacing: 0.02em;
}

/* ── 版本卡片 ── */
.version-card {
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  padding: 36px;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

.version-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-border-hover);
}

.version-card .badge {
  margin-bottom: 16px;
  align-self: flex-start;
}

.version-card h3 {
  color: var(--color-forest);
  margin-bottom: 12px;
  font-size: 1.25rem;
}

.version-card p {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  line-height: 1.7;
  margin-bottom: 16px;
}

.version-meta {
  margin-bottom: 24px;
}

.version-meta-item {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.875rem;
}

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

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

.version-card .btn {
  margin-top: auto;
}

/* ── 下载详情面板 ── */
.download-panel {
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  padding: 48px;
  box-shadow: var(--shadow-card);
  max-width: 700px;
  margin: 0 auto;
}

.download-detail {
  margin-bottom: 32px;
}

.download-detail-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9375rem;
}

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

.download-detail-value {
  color: var(--color-text-primary);
  font-weight: 500;
}

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

@media (max-width: 768px) {
  .download-panel {
    padding: 28px;
  }

  .download-actions {
    flex-direction: column;
  }

  .download-actions .btn {
    width: 100%;
  }
}

/* ── 安全验证板 ── */
.security-panel {
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  padding: 40px;
  box-shadow: var(--shadow-card);
  max-width: 800px;
  margin: 0 auto;
  border-left: 4px solid var(--color-forest);
}

.security-icon {
  width: 48px;
  height: 48px;
  color: var(--color-forest);
  margin-bottom: 20px;
  animation: pulse-soft 3s ease-in-out infinite;
}

.security-panel h3 {
  color: var(--color-forest);
  margin-bottom: 12px;
}

.security-panel p {
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.sha-code {
  display: inline-block;
  background: #f8fafc;
  padding: 12px 16px;
  border-radius: 8px;
  font-family: "SF Mono", "Fira Code", monospace;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  word-break: break-all;
}

/* ── 平台卡片 ── */
.platform-card {
  background: var(--bg-card);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
  text-decoration: none;
  color: inherit;
}

.platform-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-border-hover);
  text-decoration: none;
}

.platform-card svg {
  width: 40px;
  height: 40px;
  color: var(--color-forest);
  margin-bottom: 12px;
}

.platform-card h4 {
  color: var(--color-text-primary);
  margin-bottom: 8px;
  font-size: 1rem;
}

.platform-card p {
  color: var(--color-text-secondary);
  font-size: 0.8125rem;
  margin-bottom: 12px;
}

.platform-card .link-arrow {
  color: var(--color-forest);
  font-size: 0.875rem;
  font-weight: 500;
}

/* ── 提示框 ── */
.tip-box {
  background: var(--color-tip-bg);
  border: 1px solid var(--color-tip-border);
  border-radius: 16px;
  padding: 32px;
  max-width: 800px;
  margin: 0 auto;
}

.tip-box h3 {
  color: var(--color-forest);
  margin-bottom: 16px;
}

.tip-box p {
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.tip-box ol {
  margin: 12px 0;
  padding-left: 24px;
  color: var(--color-text-secondary);
}

.tip-box li {
  margin-bottom: 8px;
  line-height: 1.7;
}

/* ── 页脚 ── */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: 48px 0 32px;
  position: relative;
  z-index: 1;
}

.footer-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  padding: 4px 8px;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--color-forest);
  text-decoration: none;
}

.footer-links .sep {
  color: var(--color-border);
  user-select: none;
}

.footer-note {
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.footer-note p {
  color: var(--color-text-muted);
}

/* ── CTA 区块 ── */
.cta-section {
  background: var(--gradient-cta);
  padding: var(--section-pad-y) 0;
  text-align: center;
  position: relative;
  z-index: 1;
}

.cta-section h2 {
  color: #ffffff;
  margin-bottom: 16px;
}

.cta-section p {
  color: rgba(255, 255, 255, 0.9);
  max-width: 600px;
  margin: 0 auto 32px;
}

/* ── Hero 区特殊样式 ── */
.hero {
  min-height: 80vh;
  padding: 120px 0 80px;
  display: flex;
  align-items: center;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero-content h1 {
  color: var(--color-forest);
  margin-bottom: 16px;
  line-height: 1.2;
}

.hero-content p {
  color: var(--color-text-secondary);
  font-size: 1.125rem;
  margin-bottom: 32px;
  max-width: 480px;
}

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

.hero-browser {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-browser-svg {
  width: 100%;
  max-width: 420px;
  filter: drop-shadow(0 12px 40px rgba(5, 150, 105, 0.15));
  transform: perspective(1000px) rotateY(-8deg);
  transition: transform 0.5s ease;
}

.hero-browser-svg:hover {
  transform: perspective(1000px) rotateY(-4deg) translateY(-4px);
}

@media (max-width: 768px) {
  .hero {
    min-height: auto;
    padding: 100px 0 48px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero-browser {
    order: -1;
  }

  .hero-browser-svg {
    max-width: 280px;
    transform: none;
  }

  .hero-actions {
    flex-direction: column;
  }

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