/* ============================================
   黑料官网_首页最新版下载 - APP下载与PWA承接站 样式表
   暗色高级感 · 卡片化布局 · 移动端优先
   ============================================ */

/* CSS变量定义 */
:root {
  --color-bg: #0f0f1a;
  --color-bg-secondary: #1a1a2e;
  --color-bg-card: #16213e;
  --color-bg-card-hover: #1c2a4a;
  --color-primary: #4f46e5;
  --color-primary-light: #6366f1;
  --color-primary-dark: #3730a3;
  --color-accent: #06b6d4;
  --color-accent-light: #22d3ee;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-text-dim: #64748b;
  --color-border: #334155;
  --color-border-light: #475569;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 20px rgba(79,70,229,0.3);
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Fira Mono", monospace;
  --container-max: 1200px;
}

/* 基础重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-light);
}

ul, ol {
  list-style: none;
}

/* 容器 */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* ============ Header ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(15, 15, 26, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-md) 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--color-text);
  font-weight: 700;
  font-size: 1.1rem;
}

.logo:hover {
  color: var(--color-primary-light);
}

.logo img {
  border-radius: var(--radius-sm);
}

/* 导航 */
.nav-main {
  display: none;
}

.nav-main.active {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-md) var(--spacing-lg);
  gap: var(--spacing-sm);
}

.nav-main a {
  color: var(--color-text-muted);
  padding: var(--spacing-sm) 0;
  font-size: 0.95rem;
  transition: color var(--transition-fast);
}

.nav-main a:hover,
.nav-main a.active {
  color: var(--color-primary-light);
}

/* 移动菜单按钮 */
.menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-normal);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition-normal);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(79,70,229,0.5);
  color: #fff;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--color-border-light);
  color: var(--color-text);
}

.btn-outline:hover {
  border-color: var(--color-primary-light);
  color: var(--color-primary-light);
  background: rgba(79,70,229,0.08);
}

.btn-accent {
  background: linear-gradient(135deg, var(--color-accent), #0891b2);
  color: #fff;
}

.btn-accent:hover {
  transform: translateY(-2px);
  color: #fff;
}

.btn-sm {
  padding: 0.4rem 1rem;
  font-size: 0.82rem;
}

.btn-lg {
  padding: 0.85rem 2rem;
  font-size: 1rem;
}

/* ============ Hero区域 ============ */
.hero {
  position: relative;
  padding: var(--spacing-3xl) 0;
  text-align: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0.4;
  object-fit: cover;
  width: 100%;
  height: 100%;
}

.hero h1 {
  font-size: clamp(1.8rem, 5vw, 3rem);
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--color-text), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 auto var(--spacing-xl);
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* ============ Section通用 ============ */
.section {
  padding: var(--spacing-3xl) 0;
}

.section-title {
  font-size: clamp(1.4rem, 3vw, 1.8rem);
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.section-desc {
  text-align: center;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto var(--spacing-2xl);
}

/* ============ 卡片系统 ============ */
.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: all var(--transition-normal);
}

.card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.card h3 {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.card p {
  color: var(--color-text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

.card-icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--spacing-md);
  border-radius: var(--radius-md);
}

/* ============ 功能亮点 ============ */
.feature-card {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-lg);
}

.feature-card .card-icon {
  flex-shrink: 0;
}

/* ============ 版本日志 ============ */
.changelog-list {
  max-width: 700px;
  margin: 0 auto;
}

.changelog-item {
  position: relative;
  padding-left: var(--spacing-xl);
  padding-bottom: var(--spacing-xl);
  border-left: 2px solid var(--color-border);
}

.changelog-item::before {
  content: '';
  position: absolute;
  left: -6px;
  top: 4px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-primary);
}

.changelog-item .version-tag {
  display: inline-block;
  background: rgba(79,70,229,0.15);
  color: var(--color-primary-light);
  padding: 2px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.changelog-item .version-date {
  font-size: 0.82rem;
  color: var(--color-text-dim);
  margin-left: var(--spacing-sm);
}

.changelog-item h4 {
  margin: var(--spacing-xs) 0;
  font-size: 1rem;
}

.changelog-item p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* ============ FAQ ============ */
.faq-list {
  max-width: 750px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  background: var(--color-bg-card);
  border: none;
  padding: var(--spacing-lg);
  text-align: left;
  color: var(--color-text);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background var(--transition-fast);
}

.faq-question:hover {
  background: var(--color-bg-card-hover);
}

.faq-question::after {
  content: '+';
  font-size: 1.3rem;
  color: var(--color-primary-light);
  transition: transform var(--transition-normal);
}

.faq-item.active .faq-question::after {
  content: '−';
}

.faq-answer {
  display: none;
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  background: var(--color-bg-card);
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.8;
}

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

/* ============ 面包屑 ============ */
.breadcrumb {
  padding: var(--spacing-md) 0;
  font-size: 0.85rem;
  color: var(--color-text-dim);
}

.breadcrumb a {
  color: var(--color-text-muted);
}

.breadcrumb a:hover {
  color: var(--color-primary-light);
}

.breadcrumb span {
  margin: 0 var(--spacing-xs);
}

/* ============ 搜索框 ============ */
.search-box {
  position: relative;
  max-width: 500px;
  margin: 0 auto;
}

.search-input {
  width: 100%;
  padding: 0.8rem 1.2rem;
  padding-right: 3rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text);
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition-fast);
}

.search-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(79,70,229,0.15);
}

.search-input::placeholder {
  color: var(--color-text-dim);
}

.search-btn {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  font-size: 1.1rem;
}

.search-suggestions {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-top: 4px;
  display: none;
  z-index: 100;
  box-shadow: var(--shadow-lg);
}

.search-suggestions.active {
  display: block;
}

.search-suggestions a {
  display: block;
  padding: var(--spacing-sm) var(--spacing-lg);
  color: var(--color-text-muted);
  font-size: 0.9rem;
  border-bottom: 1px solid var(--color-border);
}

.search-suggestions a:last-child {
  border-bottom: none;
}

.search-suggestions a:hover {
  background: var(--color-bg-card-hover);
  color: var(--color-text);
}

/* ============ 安装步骤 ============ */
.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  counter-reset: step;
}

.step-item {
  position: relative;
  padding: var(--spacing-xl);
  padding-left: calc(var(--spacing-xl) + 3rem);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  counter-increment: step;
}

.step-item::before {
  content: counter(step);
  position: absolute;
  left: var(--spacing-lg);
  top: var(--spacing-xl);
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  font-size: 0.85rem;
  font-weight: 700;
}

.step-item h3 {
  font-size: 1rem;
  margin-bottom: var(--spacing-xs);
}

.step-item p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* ============ 标签 ============ */
.tag {
  display: inline-block;
  padding: 3px 10px;
  background: rgba(6,182,212,0.12);
  color: var(--color-accent);
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  font-weight: 500;
}

.tag-primary {
  background: rgba(79,70,229,0.12);
  color: var(--color-primary-light);
}

/* ============ 表格 ============ */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.table-wrapper table {
  width: 100%;
  border-collapse: collapse;
}

.table-wrapper th,
.table-wrapper td {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9rem;
}

.table-wrapper th {
  background: var(--color-bg-card);
  font-weight: 600;
  color: var(--color-text);
}

.table-wrapper td {
  color: var(--color-text-muted);
}

/* ============ PWA安装提示 ============ */
.pwa-prompt {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-bg-card);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg) var(--spacing-xl);
  display: none;
  align-items: center;
  gap: var(--spacing-md);
  z-index: 9999;
  box-shadow: var(--shadow-lg);
  max-width: 90vw;
}

.pwa-prompt.show {
  display: flex;
}

.pwa-prompt-text {
  font-size: 0.9rem;
  color: var(--color-text);
}

.pwa-prompt-close {
  background: none;
  border: none;
  color: var(--color-text-dim);
  cursor: pointer;
  font-size: 1.2rem;
  padding: 4px;
}

/* ============ 返回顶部 ============ */
.back-to-top {
  position: fixed;
  bottom: 80px;
  right: 20px;
  width: 44px;
  height: 44px;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  z-index: 999;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.back-to-top.show {
  display: flex;
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}

/* ============ Toast提示 ============ */
.toast {
  position: fixed;
  top: 80px;
  right: 20px;
  background: var(--color-success);
  color: #fff;
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  z-index: 10000;
  display: none;
  box-shadow: var(--shadow-md);
  animation: slideIn 0.3s ease;
}

.toast.show {
  display: block;
}

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ============ Footer ============ */
.site-footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-brand p {
  color: var(--color-text-muted);
  font-size: 0.88rem;
  margin-top: var(--spacing-sm);
  line-height: 1.7;
}

.footer-links h4 {
  font-size: 0.95rem;
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

.footer-links a {
  display: block;
  color: var(--color-text-muted);
  font-size: 0.88rem;
  padding: 3px 0;
}

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

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: var(--spacing-lg);
  text-align: center;
  font-size: 0.82rem;
  color: var(--color-text-dim);
}

.footer-bottom a {
  color: var(--color-text-muted);
  margin: 0 var(--spacing-sm);
}

/* ============ 合规提醒条 ============ */
.compliance-notice {
  background: rgba(245,158,11,0.08);
  border: 1px solid rgba(245,158,11,0.25);
  border-radius: var(--radius-md);
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 0.85rem;
  color: var(--color-warning);
  margin-top: var(--spacing-xl);
}

/* ============ 内页通用 ============ */
.page-header {
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--spacing-2xl);
}

.page-header h1 {
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.page-header p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  max-width: 700px;
}

.page-content {
  max-width: 800px;
  margin: 0 auto;
  padding-bottom: var(--spacing-3xl);
}

.page-content h2 {
  font-size: 1.4rem;
  margin: var(--spacing-2xl) 0 var(--spacing-md);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
}

.page-content h3 {
  font-size: 1.1rem;
  margin: var(--spacing-lg) 0 var(--spacing-sm);
}

.page-content p {
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-md);
  line-height: 1.8;
}

.page-content ul {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-lg);
}

.page-content ul li {
  color: var(--color-text-muted);
  padding: var(--spacing-xs) 0;
  position: relative;
  padding-left: var(--spacing-md);
}

.page-content ul li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--color-primary-light);
}

/* ============ 相关链接 ============ */
.related-links {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.related-links h3 {
  font-size: 1rem;
  margin-bottom: var(--spacing-md);
}

.related-links a {
  display: inline-block;
  margin-right: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-md);
  background: rgba(79,70,229,0.08);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
}

/* ============ 响应式 - 平板 ============ */
@media (min-width: 768px) {
  .nav-main {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
  }

  .menu-toggle {
    display: none;
  }

  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .steps {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

/* ============ 响应式 - 桌面 ============ */
@media (min-width: 1024px) {
  .card-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .hero {
    padding: var(--spacing-3xl) 0 calc(var(--spacing-3xl) + 2rem);
  }
}

/* ============ 打印样式 ============ */
@media print {
  .site-header,
  .site-footer,
  .back-to-top,
  .pwa-prompt,
  .toast {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }
}