:root {
  --primary: #5b8def;
  --primary-color: var(--primary);
  --primary-hover: #4a7be0;
  --primary-soft: #eef3fe;
  
  --bg-color: #f6f8fc;
  --surface: #ffffff;
  --sidebar-bg: #ffffff;
  
  --border: #eff2f7;
  --border-color: var(--border);
  
  --text: #1f2937;
  --text-main: var(--text);
  --text-soft: #6b7280;
  --text-sub: #8b95a8;
  --text-mute: #9ca3af;

  --tag-rec-bg: #ff8a65;
  --tag-rec-text: #fff;

  --mint: #34d399;
  --mint-soft: #ecfdf5;
  --peach: #ff8a65;
  --peach-soft: #fff1ed;
  --lavender: #a78bfa;
  --lavender-soft: #f3eeff;
  --rose: #fb7185;
  --rose-soft: #fff1f2;
  --slate: #64748b;
  --slate-soft: #f1f5f9;

  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 2px 10px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 8px 28px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 16px 48px rgba(15, 23, 42, 0.08);

  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 18px;
  --radius-xl: 24px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg-color);
  background-image:
    radial-gradient(at 0% 0%, rgba(91, 141, 239, 0.08) 0, transparent 45%),
    radial-gradient(at 100% 100%, rgba(167, 139, 250, 0.06) 0, transparent 45%),
    radial-gradient(at 100% 0%, rgba(52, 211, 153, 0.05) 0, transparent 40%);
  color: var(--text-main);
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  font-size: 14px;
  line-height: 1.55;
  letter-spacing: 0.1px;
}

/* ============ 顶部导航 ============ */
.header {
  height: 64px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  display: flex;
  align-items: center;
  padding: 0 28px;
  border-bottom: 1px solid var(--border);
  z-index: 10;
  justify-content: space-between;
  position: relative;
}

.logo {
  display: flex;
  align-items: center;
  font-size: 1.2rem;
  font-weight: 700;
  background: linear-gradient(135deg, #5b8def 0%, #a78bfa 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 0.5px;
}
.logo i {
  margin-right: 10px;
  font-size: 1.5rem;
  background: linear-gradient(135deg, #5b8def 0%, #a78bfa 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.header-actions {
  display: flex;
  gap: 10px;
}

.nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.85rem;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.25s ease;
  white-space: nowrap;
  border: 1px solid transparent;
  height: 36px;
}

.btn-node {
  background: var(--mint-soft);
  color: #059669;
  border-color: rgba(52, 211, 153, 0.25);
}
.btn-node:hover {
  background: linear-gradient(135deg, #34d399, #10b981);
  color: #fff;
  border-color: transparent;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(16, 185, 129, 0.25);
}

.btn-group {
  background: var(--primary-soft);
  color: var(--primary);
  border-color: rgba(91, 141, 239, 0.25);
}
.btn-group:hover {
  background: linear-gradient(135deg, #6ea0f5, #4a7be0);
  color: #fff;
  border-color: transparent;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(91, 141, 239, 0.28);
}

/* ============ 主体布局 ============ */
.main-container {
  display: flex;
  flex: 1;
  height: calc(100vh - 64px);
  height: calc(100dvh - 64px);
  min-height: 0;
}

/* ============ 侧边栏 ============ */
.sidebar {
  width: 232px;
  background: transparent;
  padding: 18px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex-shrink: 0;
}

.menu-item {
  padding: 11px 16px;
  cursor: pointer;
  color: var(--text-soft);
  display: flex;
  align-items: center;
  font-size: 0.92rem;
  font-weight: 500;
  transition: all 0.2s ease;
  border-radius: var(--radius-md);
  position: relative;
  user-select: none;
}
.menu-item:hover {
  background: rgba(91, 141, 239, 0.06);
  color: var(--text-main);
}
.menu-item.active {
  background: linear-gradient(135deg, rgba(91, 141, 239, 0.12), rgba(167, 139, 250, 0.08));
  color: var(--primary);
  font-weight: 600;
}
.menu-item.active::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 16px;
  background: linear-gradient(180deg, #5b8def, #a78bfa);
  border-radius: 2px;
}
.menu-item i {
  width: 22px;
  margin-right: 10px;
  font-size: 0.95rem;
}

/* ============ 内容区域 ============ */
.content-area {
  flex: 1;
  background: var(--surface);
  margin: 12px 16px 16px 0;
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 0;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  animation: fadeUp 0.5s ease both;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============ 工具栏 + 搜索 ============ */
.toolbar {
  padding: 18px 24px 14px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.breadcrumb {
  font-size: 0.95rem;
  color: var(--text-soft);
  font-weight: 500;
  display: flex;
  align-items: center;
  flex: 1;
  min-width: 0;
}
.breadcrumb::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 16px;
  background: linear-gradient(180deg, #5b8def, #a78bfa);
  border-radius: 2px;
  margin-right: 10px;
}

.search-box {
  position: relative;
  flex: 0 0 280px;
  max-width: 280px;
}
.search-box .search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-mute);
  font-size: 0.85rem;
  pointer-events: none;
}
.search-box input {
  width: 100%;
  padding: 9px 36px 9px 36px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #f6f8fc;
  font-size: 0.88rem;
  color: var(--text);
  outline: none;
  transition: all 0.2s ease;
}
.search-box input:focus {
  background: #fff;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(91, 141, 239, 0.12);
}
.search-box input::placeholder { color: var(--text-mute); }
.search-clear {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-mute);
  cursor: pointer;
  font-size: 1rem;
  padding: 4px;
  display: none;
  line-height: 0;
}
.search-clear:hover { color: var(--rose); }
.search-box.has-value .search-clear { display: block; }

/* ============ 列表 ============ */
.file-list {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  min-height: 0;
  padding: 8px 12px 20px;
  scrollbar-width: thin;
  scrollbar-color: #d8dee8 transparent;
}
.file-list::-webkit-scrollbar { width: 8px; }
.file-list::-webkit-scrollbar-thumb {
  background: #d8dee8;
  border-radius: 999px;
}
.file-list::-webkit-scrollbar-thumb:hover { background: #b8c2d2; }

.file-row-header {
  display: flex;
  padding: 10px 16px;
  margin: 0 4px;
  color: var(--text-mute);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.file-row {
  display: flex;
  align-items: center;
  padding: 14px 16px;
  margin: 4px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.25s ease;
  text-decoration: none;
  color: inherit;
  border: 1px solid transparent;
}
.file-row:hover {
  background: linear-gradient(135deg, #fafbff, #f5f8ff);
  border-color: var(--border);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.col-name {
  flex: 3;
  display: flex;
  align-items: center;
  min-width: 0;
}
.col-date {
  width: 140px;
  color: var(--text-mute);
  font-size: 0.82rem;
  display: flex;
  align-items: center;
}
.col-action {
  width: 80px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

/* ============ 文件图标徽章 ============ */
.file-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
  margin-right: 14px;
  transition: all 0.25s ease;
}
.file-row:hover .file-icon {
  transform: scale(1.05) rotate(-2deg);
}
.file-icon.zip { background: var(--lavender-soft); color: var(--lavender); }
.file-icon.exe { background: var(--primary-soft); color: var(--primary); }
.file-icon.apk { background: var(--mint-soft); color: var(--mint); }
.file-icon.dmg { background: var(--slate-soft); color: var(--slate); }
.file-icon.doc { background: var(--peach-soft); color: var(--peach); }

.file-info-group {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  flex: 1;
}
.file-name-wrapper {
  display: flex;
  align-items: center;
  margin-bottom: 4px;
  flex-wrap: wrap;
  gap: 8px;
}
.file-name-text {
  font-weight: 600;
  font-size: 0.96rem;
  color: var(--text-main);
}
.file-desc {
  font-size: 0.82rem;
  color: var(--text-mute);
  line-height: 1.5;
}

/* ============ 标签 ============ */
.tag-recommend {
  background: linear-gradient(135deg, #ffa07b, #ff7043);
  color: #fff;
  font-size: 0.68rem;
  padding: 2px 9px;
  border-radius: 999px;
  font-weight: 600;
  letter-spacing: 0.3px;
  white-space: nowrap;
  box-shadow: 0 2px 6px rgba(255, 122, 67, 0.25);
}
.tag-recommend.new {
  background: linear-gradient(135deg, #6ea4ff, #4a7be0);
  box-shadow: 0 2px 6px rgba(91, 141, 239, 0.3);
}
.tag-recommend.hot {
  background: linear-gradient(135deg, #fb7185, #e11d48);
  box-shadow: 0 2px 6px rgba(225, 29, 72, 0.25);
}
/* 设备标签 */
.tag-recommend.pc {
  background: linear-gradient(135deg, #6ea4ff, #4a7be0);
  box-shadow: 0 2px 6px rgba(91, 141, 239, 0.3);
}
.tag-recommend.mac {
  background: linear-gradient(135deg, #a78bfa, #7c5cd6);
  box-shadow: 0 2px 6px rgba(124, 92, 214, 0.3);
}
.tag-recommend.phone {
  background: linear-gradient(135deg, #34d399, #10b981);
  box-shadow: 0 2px 6px rgba(16, 185, 129, 0.3);
}

/* ============ 下载按钮 ============ */
.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  color: var(--primary);
  background: var(--primary-soft);
  text-decoration: none;
  transition: all 0.25s ease;
}
.file-row:hover .download-btn {
  background: linear-gradient(135deg, #6ea4ff, #4a7be0);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 6px 14px rgba(91, 141, 239, 0.3);
}

/* ============ 空状态 ============ */
#empty-state {
  text-align: center;
  padding: 60px 20px !important;
  color: var(--text-mute) !important;
}
#empty-state i {
  font-size: 3rem !important;
  margin-bottom: 14px !important;
  opacity: 0.5;
}

/* ============ 机场推荐位 ============ */
.airport-card {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 10px 4px 16px;
  padding: 16px 18px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #fff0e6 0%, #ffe6f3 50%, #e6efff 100%);
  text-decoration: none;
  color: var(--text-main);
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: var(--shadow-xs);
}
.airport-card::after {
  content: "";
  position: absolute;
  top: -40%;
  left: -10%;
  width: 60%;
  height: 200%;
  background: linear-gradient(
    115deg,
    transparent 30%,
    rgba(255, 255, 255, 0.45) 50%,
    transparent 70%
  );
  transform: translateX(-100%);
  transition: transform 0.9s ease;
  pointer-events: none;
}
.airport-card:hover::after {
  transform: translateX(220%);
}
.airport-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(255, 122, 67, 0.16);
}
.airport-ad {
  position: absolute;
  top: 8px;
  right: 12px;
  font-size: 0.62rem;
  color: rgba(31, 41, 55, 0.55);
  background: rgba(255, 255, 255, 0.65);
  padding: 1px 6px;
  border-radius: 4px;
  font-weight: 500;
  z-index: 1;
}
.airport-icon {
  width: 50px;
  height: 50px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  color: #ff7043;
  flex-shrink: 0;
  z-index: 1;
}
.airport-info {
  flex: 1;
  min-width: 0;
  z-index: 1;
}
.airport-title {
  font-weight: 700;
  font-size: 0.98rem;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
  flex-wrap: wrap;
}
.airport-pill {
  background: linear-gradient(135deg, #ff7043, #f43f5e);
  color: #fff;
  font-size: 0.7rem;
  padding: 2px 9px;
  border-radius: 999px;
  font-weight: 600;
  white-space: nowrap;
}
.airport-desc {
  font-size: 0.78rem;
  color: var(--text-soft);
  line-height: 1.5;
}
.airport-cta {
  background: rgba(255, 255, 255, 0.78);
  color: var(--text-main);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  z-index: 1;
  transition: all 0.25s ease;
}
.airport-card:hover .airport-cta {
  background: #fff;
  transform: translateX(2px);
}

/* ============ 弹窗（公告 / 下载共用） ============ */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  justify-content: center;
  align-items: center;
  padding: 16px;
}
.modal-box {
  background: #fff;
  width: 100%;
  max-width: 420px;
  border-radius: var(--radius-xl);
  padding: 0;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  animation: popIn 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes popIn {
  from { transform: scale(0.92) translateY(10px); opacity: 0; }
  to { transform: scale(1) translateY(0); opacity: 1; }
}
.modal-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  padding: 20px 24px;
  background: linear-gradient(135deg, #5b8def 0%, #a78bfa 100%);
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
}
.modal-title::after {
  content: "";
  position: absolute;
  right: -20px;
  top: -20px;
  width: 80px;
  height: 80px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 50%;
}
.modal-content {
  font-size: 0.92rem;
  color: var(--text-soft);
  line-height: 1.7;
  padding: 20px 24px 8px;
  text-align: left;
}
.modal-content p { margin-bottom: 6px; }
.modal-content strong { color: var(--text-main); }
.modal-btn {
  display: block;
  margin: 12px 22px 20px;
  background: linear-gradient(135deg, #5b8def 0%, #4a7be0 100%);
  color: #fff;
  border: none;
  padding: 11px 30px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  width: calc(100% - 44px);
  transition: all 0.25s ease;
  box-shadow: 0 6px 16px rgba(91, 141, 239, 0.3);
}
.modal-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 22px rgba(91, 141, 239, 0.4);
}
.modal-btn-ghost {
  background: transparent;
  color: var(--text-soft);
  box-shadow: none !important;
}
.modal-btn-ghost:hover {
  background: var(--slate-soft);
}

/* ============ 下载弹窗专属 ============ */
.modal-download .modal-title {
  background: linear-gradient(135deg, #5b8def 0%, #6ea4ff 100%);
}
.dl-filename {
  font-size: 0.9rem;
  font-weight: 600;
  background: var(--primary-soft);
  color: var(--primary);
  padding: 10px 14px;
  border-radius: 12px;
  margin-bottom: 12px;
  word-break: break-all;
  display: flex;
  align-items: center;
  gap: 8px;
}
.dl-tip {
  background: #fff7e6;
  border: 1px solid #ffe58f;
  color: #b45309;
  padding: 10px 12px;
  border-radius: 12px;
  font-size: 0.8rem;
  margin-bottom: 14px;
  line-height: 1.6;
}
.dl-tip i { margin-right: 6px; }
.dl-mirrors {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.dl-mirror-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 11px 14px;
  border-radius: 12px;
  background: #f6f8fc;
  text-decoration: none;
  color: var(--text-main);
  font-size: 0.86rem;
  font-weight: 500;
  border: 1px solid var(--border);
  transition: all 0.2s ease;
}
.dl-mirror-btn:hover {
  background: var(--primary-soft);
  border-color: rgba(91, 141, 239, 0.3);
  transform: translateX(2px);
}
.dl-mirror-btn.primary {
  background: linear-gradient(135deg, #5b8def, #4a7be0);
  color: #fff;
  border-color: transparent;
}
.dl-mirror-btn.primary:hover {
  box-shadow: 0 6px 14px rgba(91, 141, 239, 0.32);
  background: linear-gradient(135deg, #6ea4ff, #4a7be0);
}
.dl-mirror-name {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}
.dl-mirror-name i {
  flex-shrink: 0;
}
.dl-mirror-arrow {
  opacity: 0.75;
  font-size: 0.8rem;
  flex-shrink: 0;
}

/* ============ 移动端 ============ */
@media (max-width: 768px) {
  body { font-size: 14px; }

  .header { height: 56px; padding: 0 14px; }
  .logo { font-size: 1.05rem; }
  .logo span { display: none; }
  .logo i { margin-right: 0; font-size: 1.6rem; }

  .header-actions { gap: 6px; }
  .nav-btn {
    padding: 6px 12px;
    font-size: 0.78rem;
    height: 32px;
  }

  .main-container {
    flex-direction: column;
    height: calc(100vh - 56px);
    height: calc(100dvh - 56px);
    min-height: 0;
  }

  .sidebar {
    width: 100%;
    flex-direction: row;
    overflow-x: auto;
    padding: 12px 14px;
    flex-shrink: 0;
    border: none;
    gap: 8px;
    scrollbar-width: none;
  }
  .sidebar::-webkit-scrollbar { display: none; }

  .menu-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 8px 14px;
    font-size: 0.84rem;
    flex-shrink: 0;
    white-space: nowrap;
  }
  .menu-item.active {
    background: linear-gradient(135deg, #5b8def, #4a7be0);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(91, 141, 239, 0.32);
  }
  .menu-item.active::before { display: none; }
  .menu-item:hover { background: #fff; }
  .menu-item i { margin-right: 6px; }

  .content-area {
    margin: 0 12px 12px;
    border-radius: var(--radius-lg);
  }

  .toolbar {
    padding: 12px 14px;
    gap: 10px;
    flex-direction: column;
    align-items: stretch;
  }
  .breadcrumb { font-size: 0.85rem; }
  .search-box {
    flex: 1;
    max-width: none;
    width: 100%;
  }

  .col-date,
  .file-row-header { display: none; }

  .file-list { padding: 6px 8px 16px; }
  .file-row {
    padding: 12px 12px;
    margin: 4px 2px;
  }

  .file-icon {
    width: 40px;
    height: 40px;
    font-size: 1.05rem;
    margin-right: 12px;
    border-radius: 10px;
  }

  .file-name-text { font-size: 0.9rem; }
  .file-desc {
    font-size: 0.76rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .download-btn {
    width: 36px;
    height: 36px;
    border-radius: 10px;
  }

  /* 移动端机场卡片 */
  .airport-card {
    flex-wrap: wrap;
    padding: 14px;
    gap: 10px;
  }
  .airport-icon { width: 42px; height: 42px; font-size: 1.15rem; border-radius: 12px; }
  .airport-title { font-size: 0.9rem; }
  .airport-desc { font-size: 0.74rem; }
  .airport-cta {
    padding: 6px 12px;
    font-size: 0.76rem;
    margin-left: auto;
  }

  .modal-box { max-width: 100%; }
  .modal-title { padding: 16px 20px; font-size: 1rem; }
  .modal-content { padding: 16px 20px 4px; font-size: 0.86rem; }
  .modal-btn {
    margin: 10px 16px 16px;
    width: calc(100% - 32px);
    padding: 10px 24px;
    font-size: 0.9rem;
  }
  .dl-mirror-btn { padding: 10px 12px; font-size: 0.82rem; }
}

/* ============ 教程页面样式 ============ */
.article-container {
  padding: 30px 40px;
  overflow-y: auto;
  scroll-behavior: smooth;
  height: 100%;
}

.article-title {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-main);
  background: linear-gradient(135deg, var(--text-main) 0%, var(--primary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.article-meta {
  color: var(--text-sub);
  font-size: 0.9rem;
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-meta i {
  color: var(--primary);
  font-size: 0.95rem;
}

.section-title {
  font-size: 1.4rem;
  font-weight: 600;
  margin-top: 40px;
  margin-bottom: 20px;
  padding-left: 14px;
  border-left: 4px solid var(--primary-color);
  color: var(--text-main);
  display: flex;
  align-items: center;
  position: relative;
}

.section-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--primary), var(--lavender));
  border-radius: 2px;
}

.section-title i {
  margin-right: 10px;
  color: var(--primary-color);
  font-size: 1.2rem;
}

.step-list {
  list-style: none;
  counter-reset: step;
}

.step-item {
  position: relative;
  padding-left: 45px;
  margin-bottom: 25px;
  transition: all 0.3s ease;
}

.step-item:hover {
  transform: translateX(4px);
}

.step-item::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--primary-soft), rgba(167, 139, 250, 0.15));
  color: var(--primary-color);
  border-radius: 50%;
  text-align: center;
  line-height: 32px;
  font-weight: bold;
  font-size: 0.9rem;
  box-shadow: 0 2px 8px rgba(91, 141, 239, 0.2);
}

.step-title {
  font-weight: 600;
  font-size: 1.05rem;
  margin-bottom: 8px;
  color: var(--text-main);
}

.step-desc {
  font-size: 0.95rem;
  color: var(--text-soft);
  line-height: 1.7;
  background: linear-gradient(135deg, #f9fafd, #f5f8ff);
  padding: 16px;
  border-radius: 14px;
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.step-desc:hover {
  border-color: rgba(91, 141, 239, 0.3);
  box-shadow: 0 4px 12px rgba(91, 141, 239, 0.08);
}

.tip-box {
  background: linear-gradient(135deg, #fff7e6, #fffbe6);
  border: 1px solid #ffe58f;
  padding: 16px;
  border-radius: 14px;
  margin: 16px 0;
  font-size: 0.9rem;
  color: #d48806;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  box-shadow: 0 2px 8px rgba(212, 136, 6, 0.1);
}

.tip-box i {
  color: #faad14;
  font-size: 1rem;
  margin-top: 2px;
  flex-shrink: 0;
}

.tip-box.info {
  background: linear-gradient(135deg, #e6f7ff, #f0f9ff);
  border-color: #91d5ff;
  color: #0050b3;
}

.tip-box.info i {
  color: #1890ff;
}

.tip-box.warning {
  background: linear-gradient(135deg, #fff1f0, #fff2f0);
  border-color: #ffa39e;
  color: #cf1322;
}

.tip-box.warning i {
  color: #ff4d4f;
}

.step-desc .highlight-link {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
  border-bottom: 1px dashed var(--primary);
  transition: all 0.2s ease;
}

.step-desc .highlight-link:hover {
  color: var(--primary-hover);
  border-bottom-style: solid;
}

.step-desc .inline-tip {
  color: var(--text-soft);
  font-size: 0.9em;
  background: #fffbe6;
  padding: 6px 10px;
  border-radius: 8px;
  display: inline-block;
  margin: 6px 0;
  border: 1px solid #ffe58f;
}

.step-desc .important-note {
  color: #cf1322;
  background: linear-gradient(135deg, #fff1f0, #fff2f0);
  padding: 6px 10px;
  border-radius: 8px;
  display: inline-block;
  font-weight: 500;
  border: 1px solid #ffa39e;
}

.section-divider {
  border: 0;
  border-top: 1px dashed var(--border-color);
  margin: 40px 0;
}

@media (max-width: 768px) {
  .article-container {
    padding: 20px;
  }
  .section-title {
    font-size: 1.2rem;
    margin-top: 30px;
  }
  .article-title {
    font-size: 1.5rem;
  }
  .step-item {
    padding-left: 40px;
  }
  .step-item::before {
    width: 28px;
    height: 28px;
    line-height: 28px;
    font-size: 0.85rem;
  }
  .step-desc {
    padding: 14px;
  }
}

.article-spacer {
  height: 100px;
}

/* ============ 返回顶部按钮 ============ */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--lavender));
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-md);
  z-index: 100;
  font-size: 1.1rem;
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}
.back-to-top:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.back-to-top:active {
  transform: translateY(0);
}

@media (max-width: 768px) {
  .back-to-top {
    bottom: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
}

/* ============ FAQ页面样式 ============ */
.faq-container {
  padding: 30px 40px;
  overflow-y: auto;
  height: 100%;
}

.faq-section {
  margin-bottom: 32px;
}

.faq-section-title {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 16px;
  padding-left: 14px;
  border-left: 4px solid var(--primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.faq-section-title i {
  color: var(--primary);
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 10px;
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item:hover {
  border-color: rgba(91, 141, 239, 0.3);
}

.faq-item summary {
  padding: 16px 20px;
  cursor: pointer;
  font-weight: 500;
  color: var(--text-main);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all 0.2s ease;
}

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

.faq-item summary::after {
  content: "\f107";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  color: var(--text-mute);
  transition: transform 0.3s ease;
}

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

.faq-item summary:hover {
  background: var(--primary-soft);
}

.faq-item[open] summary {
  background: var(--primary-soft);
  color: var(--primary);
  border-bottom: 1px solid var(--border);
}

.faq-answer {
  padding: 16px 20px;
  color: var(--text-soft);
  line-height: 1.7;
  font-size: 0.95rem;
}

.faq-answer p {
  margin-bottom: 8px;
}

.faq-answer code {
  background: var(--slate-soft);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
  color: var(--rose);
}

.faq-answer ul, .faq-answer ol {
  padding-left: 20px;
  margin: 8px 0;
}

.faq-answer li {
  margin-bottom: 6px;
}

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

@media (max-width: 768px) {
  .faq-container {
    padding: 20px;
  }
  .faq-section-title {
    font-size: 1.1rem;
  }
  .faq-item summary {
    padding: 14px 16px;
    font-size: 0.95rem;
  }
  .faq-answer {
    padding: 14px 16px;
    font-size: 0.9rem;
  }
}