/* ─── 变量 ──────────────────────────────── */
:root {
  --c-primary: #3b82f6;
  --c-primary-light: #60a5fa;
  --c-primary-dark: #2563eb;
  --c-accent: #f59e0b;
  --c-accent-light: #fbbf24;
  --c-gradient: linear-gradient(135deg, #3b82f6 0%, #2563eb 50%, #1d4ed8 100%);
  --c-gradient-warm: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
  --c-gradient-subtle: linear-gradient(135deg, rgba(59,130,246,0.08) 0%, rgba(37,99,235,0.04) 100%);
  --c-bg: #f0f4f8;
  --c-card: #ffffff;
  --c-card-hover: #f8fafc;
  --c-text: #1e293b;
  --c-text-secondary: #64748b;
  --c-text-muted: #94a3b8;
  --c-border: #e2e8f0;
  --c-hover-bg: rgba(59,130,246,0.06);
  --c-success: #3b82f6;
  --c-danger: #ef4444;
  --radius-sm: 12px;
  --radius: 14px;
  --radius-lg: 20px;
  --radius-pill: 999px;
  --shadow-xs: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.1);
  --shadow-focus: 0 0 0 3px rgba(59,130,246,0.2);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ─── Reset ──────────────────────────────── */
*,
*::before,
*::after { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  color: var(--c-text);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ─── PC端 ────────────────────────────────── */
.pc-qr-container {
  display: none;
  min-height: 100vh;
  background: linear-gradient(160deg, #eff6ff 0%, #dbeafe 40%, #bfdbfe 100%);
  justify-content: center;
  align-items: center;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

/* 背景装饰 */
.pc-qr-container::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background:
    radial-gradient(circle at 20% 30%, rgba(59,130,246,0.12) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(37,99,235,0.1) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(96,165,250,0.06) 0%, transparent 60%);
  animation: bgFloat 20s ease-in-out infinite;
}

@keyframes bgFloat {
  0%, 100% { transform: translate(0, 0); }
  33% { transform: translate(2%, -1%); }
  66% { transform: translate(-1%, 2%); }
}

.pc-qr-content {
  background: #fff;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 50px 45px 40px;
  border-radius: 24px;
  text-align: center;
  box-shadow: 0 25px 80px rgba(0,0,0,0.1), 0 0 0 1px rgba(59,130,246,0.08);
  position: relative;
  z-index: 1;
  max-width: 420px;
  animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.pc-qr-title {
  font-size: 24px;
  color: #1e293b;
  margin-bottom: 8px;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.pc-qr-subtitle {
  font-size: 14px;
  color: #64748b;
  margin-bottom: 28px;
  font-weight: 400;
}

.pc-qr-box {
  width: 200px;
  height: 200px;
  margin: 0 auto 24px;
  border-radius: var(--radius);
  display: flex;
  justify-content: center;
  align-items: center;
  background: #fff;
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
  padding: 8px;
  transition: transform var(--transition);
}

.pc-qr-box:hover {
  transform: scale(1.03);
}

.pc-qr-box img,
.pc-qr-box canvas {
  width: 100%;
  height: 100%;
  display: block;
  border-radius: 8px;
}

.pc-qr-tip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(59,130,246,0.08);
  color: var(--c-primary);
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 16px;
}

.pc-qr-tip .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-success);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.pc-qr-text {
  font-size: 14px;
  color: #64748b;
  line-height: 1.8;
}

.pc-qr-domain {
  display: inline-block;
  background: var(--c-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.5px;
}

.pc-qr-divider {
  width: 40px;
  height: 3px;
  background: var(--c-gradient);
  border-radius: 2px;
  margin: 0 auto 20px;
}

/* ─── 移动端容器 ──────────────────────────── */
.mobile-container {
  display: none;
  min-height: 100vh;
  background: var(--c-bg);
  padding-bottom: 40px;
}

/* Banner */
.banner {
  background: var(--c-gradient);
  padding: 20px 16px 18px;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.banner::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--c-primary-light), transparent);
}

.banner-title {
  font-size: 22px;
  font-weight: 700;
  text-align: center;
  letter-spacing: -0.3px;
  text-shadow: 0 2px 4px rgba(0,0,0,0.12);
}

/* 轮播 */
.carousel {
  margin: 16px 16px 0;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.carousel .layui-carousel {
  background: var(--c-card);
}

.carousel .layui-carousel > div[carousel-item] > div {
  height: 180px;
}

.carousel .layui-carousel > div[carousel-item] > div img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.carousel .layui-carousel > div[carousel-item] > div a {
  display: block;
  width: 100%;
  height: 100%;
}

/* 轮播指示器 */
.layui-carousel-ind {
  bottom: 8px !important;
}

.layui-carousel-ind ul li {
  background: rgba(255,255,255,0.6) !important;
}

.layui-carousel-ind ul.layui-this li,
.layui-carousel-ind li.layui-this {
  background: var(--c-primary) !important;
}

/* 搜索框 */
.search-container { padding: 16px 16px 14px; }

.search-box {
  display: flex;
  background: var(--c-card);
  border-radius: var(--radius-pill);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
  border: 1.5px solid var(--c-border);
}

.search-box:focus-within {
  box-shadow: var(--shadow), var(--shadow-focus);
  border-color: rgba(59,130,246,0.5);
  transform: translateY(-1px);
}

.search-input {
  flex: 1;
  border: none;
  padding: 14px 20px;
  font-size: 15px;
  outline: none;
  background: transparent;
  color: var(--c-text);
  caret-color: var(--c-primary);
}

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

.search-btn {
  background: var(--c-gradient);
  color: #fff;
  border: none;
  padding: 0 24px;
  font-size: 15px;
  cursor: pointer;
  white-space: nowrap;
  font-weight: 600;
  transition: opacity var(--transition), transform var(--transition);
  letter-spacing: 0.5px;
}

.search-btn:active {
  opacity: 0.85;
  transform: scale(0.97);
}

/* 分类标签 */
.category-tabs {
  display: flex;
  gap: 10px;
  background: transparent;
  margin: 0 16px 16px;
  padding: 0;
  position: sticky;
  top: 8px;
  z-index: 100;
}

.category-tab {
  flex: 1;
  text-align: center;
  padding: 11px 12px;
  font-size: 13px;
  color: var(--c-text-secondary);
  cursor: pointer;
  border-radius: var(--radius-sm);
  background: var(--c-card);
  border: 1.5px solid var(--c-border);
  box-shadow: var(--shadow-xs);
  transition: all var(--transition);
  font-weight: 500;
  user-select: none;
  outline: none;
  -webkit-tap-highlight-color: transparent;
  letter-spacing: 0.2px;
}

.category-tab:hover {
  border-color: var(--c-primary-light);
  color: var(--c-primary);
  background: var(--c-hover-bg);
}

.category-tab.active {
  background: var(--c-gradient);
  color: #fff;
  font-weight: 600;
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(59,130,246,0.3);
  transform: translateY(-2px);
}

/* APP列表 */
.app-list { padding: 0 16px 20px; }

.app-item {
  background: var(--c-card);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  box-shadow: var(--shadow-xs);
  transition: all var(--transition);
  cursor: pointer;
  border: 1px solid var(--c-border);
}

.app-item:hover {
  box-shadow: var(--shadow-sm);
  border-color: rgba(59,130,246,0.3);
  background: var(--c-hover-bg);
}

.app-item:active {
  transform: scale(0.985);
  background: rgba(59,130,246,0.08);
}

.app-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--c-gradient-subtle);
  display: flex;
  justify-content: center;
  align-items: center;
  margin-right: 13px;
  flex-shrink: 0;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.app-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 14px;
}

.app-info {
  flex: 1;
  min-width: 0;
}

.app-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--c-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  letter-spacing: -0.2px;
}

.app-tag {
  display: inline-block;
  font-size: 11px;
  color: var(--c-primary);
  background: var(--c-hover-bg);
  padding: 2px 8px;
  border-radius: 10px;
  margin-top: 4px;
  font-weight: 500;
}

/* 下载按钮 */
.app-download,
.app-store-download-btn,
.download-link-item {
  background: var(--c-gradient);
  color: #fff;
  border: none;
  font-weight: 600;
  transition: all var(--transition);
  letter-spacing: 0.3px;
}

.app-download {
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  font-size: 12.5px;
  cursor: pointer;
  flex-shrink: 0;
  box-shadow: 0 2px 10px rgba(59,130,246,0.2);
}

.app-download:active,
.app-store-download-btn:active,
.download-link-item:active {
  opacity: 0.85;
  transform: scale(0.96);
}

/* ─── Layer 弹窗内容 ──────────────────────── */
.layer-content { padding: 20px; }

.layer-title {
  text-align: center;
  margin-bottom: 20px;
  font-size: 17px;
  font-weight: 700;
  color: var(--c-text);
  letter-spacing: -0.2px;
}

.download-title {
  font-size: 13px;
  color: var(--c-text-secondary);
  margin-bottom: 15px;
  line-height: 1.8;
}

/* 搜索引擎网格 */
.search-engine-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.search-engine-item {
  background: var(--c-card);
  padding: 16px 12px;
  border-radius: var(--radius-sm);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  border: 1.5px solid var(--c-border);
  box-shadow: var(--shadow-xs);
}

.search-engine-item:hover,
.search-engine-item:active {
  background: var(--c-hover-bg);
  border-color: rgba(59,130,246,0.3);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.search-engine-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 8px;
  border-radius: var(--radius-sm);
  object-fit: contain;
  background: #f1f5f9;
}

.search-engine-name {
  font-size: 14px;
  color: var(--c-text);
  font-weight: 600;
}

/* 下载链接列表 */
.download-links-container {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.download-link-item {
  display: flex;
  align-items: center;
  padding: 13px 15px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-size: 14px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.download-link-item img {
  width: 24px;
  height: 24px;
  margin-right: 10px;
  border-radius: 6px;
}

.download-link-item span { flex: 1; }

.no-download-link {
  text-align: center;
  color: var(--c-text-muted);
  padding: 30px;
  font-size: 14px;
}

/* iOS 弹窗 */
.app-store-link-box {
  background: var(--c-hover-bg);
  padding: 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 15px;
  word-break: break-all;
  font-size: 13px;
  color: var(--c-text);
  line-height: 1.6;
  border: 1px solid var(--c-border);
}

.copy-btn {
  width: 100%;
  padding: 11px;
  background: var(--c-card);
  color: var(--c-text);
  border: 2px solid var(--c-border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all var(--transition);
}

.copy-btn:hover {
  background: var(--c-hover-bg);
  border-color: var(--c-primary-light);
  color: var(--c-primary);
}

.app-store-download-btn {
  display: block;
  padding: 13px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-size: 14px;
  text-align: center;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

/* ─── 加载状态 ──────────────────────────── */
.loading-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 50px 20px;
  gap: 14px;
}

.loading-spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--c-border);
  border-top-color: var(--c-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.loading-text {
  font-size: 14px;
  color: var(--c-text-muted);
  font-weight: 500;
}

/* ─── 广告区域 ──────────────────────────────── */
.ad-container {
  padding: 0 16px 20px;
}

.ad-item {
  margin-bottom: 10px;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-xs);
}

.ad-link {
  display: block;
  text-decoration: none;
  position: relative;
}

.ad-img {
  width: 100%;
  display: block;
  object-fit: cover;
}

.ad-name {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 8px 12px;
  background: linear-gradient(transparent, rgba(0,0,0,0.5));
  color: #fff;
  font-size: 12px;
  text-align: right;
}

/* ─── Layui Layer 弹窗适配（白底） ─────────────── */
.layui-layer-shade {
  background-color: rgba(0,0,0,0.35) !important;
}

.layui-layer-dialog .layui-layer-content,
.layui-layer-page .layui-layer-content {
  color: var(--c-text);
}

.layui-layer-title {
  background: var(--c-card) !important;
  color: var(--c-text) !important;
  border-bottom-color: var(--c-border) !important;
  font-weight: 600;
}

.layui-layer-setwin .layui-layer-close {
  color: var(--c-text-muted) !important;
}

.layui-layer-setwin .layui-layer-close:hover {
  color: var(--c-text) !important;
}

/* layer-dark 弹窗用白色背景 */
.layer-dark {
  background: #fff !important;
  border-radius: var(--radius-lg) !important;
  box-shadow: var(--shadow-lg) !important;
  overflow: hidden;
}

.layer-dark .layui-layer-content {
  color: var(--c-text);
  background: #fff;
}

.layer-dark .layui-layer-title {
  background: #fff !important;
  color: var(--c-text) !important;
  border-bottom-color: var(--c-border) !important;
  font-weight: 700;
}

/* ─── 响应式 ──────────────────────────────── */
@media (min-width: 768px) {
  .pc-qr-container { display: flex; }
}

@media (max-width: 767px) {
  .mobile-container { display: block; }
}