:root {
  --color-bg: #f8f9fc;
  --color-surface: #ffffff;
  --color-sidebar: #f1f3f8;
  --color-border: #e5e7f0;
  --color-border-light: #eef0f7;
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-primary-light: #eff6ff;
  --color-text-primary: #1a1d26;
  --color-text-secondary: #5c6370;
  --color-text-muted: #9ca3af;
  --color-accent-green: #059669;
  --color-accent-orange: #ea580c;
  --color-accent-red: #dc2626;
  --font-size-title: 22px;
  --font-size-lg: 15px;
  --font-size-base: 14px;
  --font-size-sm: 12px;
  --font-size-xs: 11px;
  --radius-sm: 8px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 0 0 3px rgba(37, 99, 235, 0.14);
  --glass-bg: rgba(255, 255, 255, 0.22);
  --glass-border: rgba(255, 255, 255, 0.45);
  --glass-blur: blur(16px) saturate(180%);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.06), inset 0 1px 0 rgba(255, 255, 255, 0.5);
  --glass-shadow-active: 0 4px 16px rgba(37, 99, 235, 0.14), inset 0 1px 0 rgba(255, 255, 255, 0.6);
  --font-body: "Inter", "PingFang SC", "Microsoft YaHei UI", system-ui, sans-serif;
  --font-display: "Plus Jakarta Sans", "PingFang SC", "Microsoft YaHei UI", system-ui, sans-serif;
}

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

html, body { height: 100%; }

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  background: var(--color-bg);
  color: var(--color-text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow: hidden;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-hover); }

button { font-family: var(--font-body); }

#app {
  width: 100%;
  height: 100dvh;
  background: var(--color-bg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  container-type: inline-size;
}

::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #cfd5e3; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #aab3c9; }

/* ================= Header ================= */
.app-header {
  height: 58px;
  min-height: 58px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  padding: 0 20px;
  gap: 16px;
  z-index: 100;
  flex-shrink: 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  color: var(--color-text-primary);
  cursor: pointer;
  white-space: nowrap;
  user-select: none;
}

.logo-favicon {
  width: 24px;
  height: 24px;
  border-radius: 7px;
  background: linear-gradient(135deg, var(--color-primary), #60a5fa);
  box-shadow: 0 3px 8px rgba(37, 99, 235, 0.35);
  position: relative;
  flex-shrink: 0;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 800;
  overflow: hidden;
}
.logo-img {
  height: 28px;
  width: auto;
  max-width: 180px;
  object-fit: contain;
  display: block;
  flex-shrink: 0;
}

.module-tabs {
  display: flex;
  gap: 3px;
  background: rgba(241, 243, 248, 0.7);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-radius: 12px;
  padding: 4px;
  border: 1px solid var(--glass-border);
}

.module-tab {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 18px;
  border-radius: 10px;
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-text-secondary);
  cursor: pointer;
  border: 1px solid transparent;
  background: transparent;
  white-space: nowrap;
  font-family: var(--font-body);
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.module-tab:hover { color: var(--color-text-primary); background: var(--glass-bg); border-color: rgba(255, 255, 255, 0.3); }

.module-tab.active {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px) saturate(200%);
  -webkit-backdrop-filter: blur(12px) saturate(200%);
  color: var(--color-primary);
  box-shadow: var(--glass-shadow-active);
  font-weight: 600;
  border-color: var(--glass-border);
}

.header-actions { margin-left: auto; display: flex; align-items: center; gap: 8px; }

.header-search {
  display: flex;
  align-items: center;
  gap: 7px;
  background: var(--color-sidebar);
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 0 12px;
  height: 34px;
  width: 220px;
  transition: all 0.15s ease;
}
.header-search svg { width: 15px; height: 15px; color: var(--color-text-muted); flex-shrink: 0; }
.header-search input {
  border: none; outline: none; background: transparent;
  font-size: var(--font-size-base);
  font-family: var(--font-body);
  color: var(--color-text-primary);
  width: 100%;
}
.header-search input::placeholder { color: var(--color-text-muted); }
.header-search:focus-within { border-color: var(--color-primary); background: var(--color-surface); box-shadow: var(--shadow-glow); }

.mobile-search {
  display: none;
  align-items: center;
  gap: 7px;
  background: var(--color-sidebar);
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 0 12px;
  height: 36px;
  width: 100%;
  box-sizing: border-box;
  flex-shrink: 0;
  transition: all 0.15s ease;
}
.mobile-search svg { width: 15px; height: 15px; color: var(--color-text-muted); flex-shrink: 0; }
.mobile-search input {
  border: none; outline: none; background: transparent;
  font-size: var(--font-size-base);
  font-family: var(--font-body);
  color: var(--color-text-primary);
  width: 100%;
}
.mobile-search input::placeholder { color: var(--color-text-muted); }
.mobile-search:focus-within { border-color: var(--color-primary); background: var(--color-surface); box-shadow: var(--shadow-glow); }

.header-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  border-radius: 10px;
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-text-secondary);
  cursor: pointer;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  white-space: nowrap;
  transition: all 0.15s ease;
  font-family: var(--font-body);
}
.header-btn:hover { border-color: var(--color-primary); color: var(--color-primary); background: var(--color-primary-light); }
.header-btn svg { width: 15px; height: 15px; flex-shrink: 0; }

.btn-login {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 18px;
  border-radius: 10px;
  border: none;
  background: linear-gradient(135deg, var(--color-primary), #60a5fa);
  color: #fff;
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font-body);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
  transition: all 0.2s ease;
  text-decoration: none;
}
.btn-login:hover { box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45); transform: translateY(-1px); color: #fff; }
.btn-login svg { width: 15px; height: 15px; }

.btn-lang {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  border-radius: 9px;
  border: 1px solid var(--color-border);
  background: #fff;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font-body);
  transition: all 0.15s ease;
  text-decoration: none;
  flex-shrink: 0;
}
.btn-lang:hover { border-color: var(--color-primary); color: var(--color-primary); background: var(--color-primary-light); }

.user-chip { display: inline-flex; align-items: center; gap: 8px; }
.user-chip .uc-avatar {
  width: 30px; height: 30px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), #60a5fa);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700;
}
.user-chip .uc-name { font-size: var(--font-size-base); font-weight: 600; color: var(--color-text-primary); max-width: 90px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.user-chip .uc-role { font-size: var(--font-size-xs); color: var(--color-text-muted); }
.user-menu { position: relative; }
.user-menu-panel {
  position: absolute; top: calc(100% + 8px); right: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 5px;
  min-width: 150px;
  z-index: 300;
  display: none;
  animation: pop-in 0.18s ease both;
}
.user-menu-panel.show { display: block; }
.user-menu-panel a, .user-menu-panel button {
  display: flex; align-items: center; gap: 8px;
  width: 100%; padding: 8px 12px;
  border-radius: 6px;
  border: none; background: transparent;
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  cursor: pointer;
  text-align: left;
  font-family: var(--font-body);
  transition: background 0.1s;
}
.user-menu-panel a:hover, .user-menu-panel button:hover { background: var(--color-sidebar); color: var(--color-primary); }
.user-menu-panel svg { width: 15px; height: 15px; color: var(--color-text-muted); }
.user-menu-panel .sep { height: 1px; background: var(--color-border-light); margin: 4px 0; }

/* ================= Master-detail ================= */
.master-detail { display: flex; flex: 1; overflow: hidden; min-height: 0; }

.sidebar {
  width: 260px;
  min-width: 260px;
  background: var(--color-sidebar);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidebar-header { padding: 14px 12px 8px; flex-shrink: 0; }
.sidebar-search-wrap { position: relative; }
.sidebar-search-wrap svg {
  position: absolute; left: 10px; top: 50%;
  transform: translateY(-50%);
  width: 15px; height: 15px;
  color: var(--color-text-muted);
  pointer-events: none;
}
.sidebar-search {
  width: 100%;
  height: 34px;
  padding: 0 10px 0 32px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  outline: none;
  transition: all 0.15s ease;
  font-family: var(--font-body);
}
.sidebar-search:focus { border-color: var(--color-primary); box-shadow: var(--shadow-glow); }
.sidebar-search::placeholder { color: var(--color-text-muted); }

.sidebar-stats { padding: 4px 14px 8px; font-size: var(--font-size-xs); color: var(--color-text-muted); flex-shrink: 0; }
.sidebar-stats strong { color: var(--color-primary); font-weight: 700; }

.category-list { flex: 1; overflow-y: auto; overflow-x: hidden; padding: 2px 6px 12px; }

.cat-group { margin-bottom: 2px; }

.cat-group-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 6px;
  padding: 8px 10px;
  border-radius: 8px;
  cursor: pointer;
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text-primary);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid transparent;
  user-select: none;
}
.cat-group-head:hover { background: rgba(255, 255, 255, 0.6); border-color: rgba(255, 255, 255, 0.35); }
.cat-group-head.open { background: rgba(255, 255, 255, 0.75); border-color: var(--glass-border); box-shadow: inset 0 1px rgba(255, 255, 255, 0.6); }
.cat-group-head .cat-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--color-primary); flex-shrink: 0; }
.cat-group-head .cat-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cat-group-head .cat-arrow {
  width: 15px; height: 15px; color: var(--color-text-muted);
  transition: transform 0.3s ease; flex-shrink: 0;
}
.cat-group-head.open .cat-arrow { transform: rotate(180deg); }

.cat-fold { max-height: 0; overflow: hidden; opacity: 0; transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.25s ease; }
.cat-group-head.open + .cat-fold { max-height: 800px; opacity: 1; }

.cat-item {
  display: flex; align-items: center; justify-content: space-between;
  gap: 6px;
  padding: 7px 10px 7px 22px;
  margin: 1px 0;
  border-radius: 8px;
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  user-select: none;
  text-decoration: none;
}
.cat-item:hover { background: rgba(255, 255, 255, 0.7); color: var(--color-text-primary); }
.cat-item.active {
  background: var(--color-primary-light);
  border-color: rgba(37, 99, 235, 0.35);
  color: var(--color-primary);
  font-weight: 600;
}
.cat-item .cat-count { font-size: var(--font-size-xs); color: var(--color-text-muted); background: rgba(0, 0, 0, 0.04); padding: 1px 7px; border-radius: 99px; }
.cat-item.active .cat-count { background: rgba(37, 99, 235, 0.14); color: var(--color-primary); }

.sidebar-footer {
  flex-shrink: 0;
  padding: 10px 14px;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border-light);
  text-align: center;
}

/* ================= Content ================= */
.content-panel { flex: 1; overflow: hidden; background: var(--color-bg); display: flex; flex-direction: column; min-width: 0; }

.view { display: none; flex: 1; min-height: 0; overflow-y: auto; flex-direction: column; padding: 22px 26px; }
.view.active { display: flex; animation: view-in 0.4s cubic-bezier(0.4, 0, 0.2, 1) both; }
.view.active.no-anim { animation: none; }

/* welcome */
.welcome-panel { display: flex; flex-direction: column; align-items: center; justify-content: flex-start; flex: 1; padding: 10vh 24px 0; text-align: center; }
.welcome-badge {
  display: inline-flex; align-items: center; gap: 7px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border: 1px solid rgba(37, 99, 235, 0.25);
  border-radius: 99px;
  padding: 5px 14px;
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: 18px;
}
.welcome-badge svg { width: 14px; height: 14px; }
.welcome-title { font-family: var(--font-display); font-size: 28px; font-weight: 800; color: var(--color-text-primary); letter-spacing: -0.5px; margin-bottom: 10px; }
.welcome-subtitle { font-size: var(--font-size-lg); color: var(--color-text-secondary); max-width: 460px; margin-bottom: 36px; }
.welcome-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; max-width: 600px; width: 100%; }

.welcome-card {
  display: flex; flex-direction: column; align-items: center;
  gap: 10px;
  padding: 28px 20px 22px;
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
  position: relative;
  overflow: hidden;
  text-decoration: none;
  color: var(--color-text-primary);
}
.welcome-card::before {
  content: "";
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
  opacity: 0;
  transition: opacity 0.2s ease;
}
.welcome-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--color-primary); }
.welcome-card:hover::before { opacity: 1; }
.wc-icon {
  width: 54px; height: 54px;
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 4px;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
}
.wc-icon svg { width: 26px; height: 26px; color: #fff; }
.wc-help { background: linear-gradient(135deg, #059669, #34d399); }
.wc-download { background: linear-gradient(135deg, var(--color-primary), #60a5fa); }
.wc-demo { background: linear-gradient(135deg, #ea580c, #fbbf24); }
.wc-name { font-family: var(--font-display); font-size: var(--font-size-lg); font-weight: 700; color: var(--color-text-primary); }
.wc-desc { font-size: var(--font-size-sm); color: var(--color-text-muted); }
.wc-link { display: inline-flex; align-items: center; gap: 4px; margin-top: 4px; font-size: var(--font-size-sm); font-weight: 600; color: var(--color-primary); opacity: 0; transform: translateY(4px); transition: all 0.2s ease; }
.wc-link svg { width: 14px; height: 14px; }
.welcome-card:hover .wc-link { opacity: 1; transform: translateY(0); }

/* page head + stats */
.page-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 14px; margin-bottom: 16px; flex-wrap: wrap; }
.page-title { font-family: var(--font-display); font-size: var(--font-size-title); font-weight: 700; color: var(--color-text-primary); letter-spacing: -0.3px; line-height: 1.2; }
.page-meta { margin-top: 3px; font-size: var(--font-size-base); color: var(--color-text-secondary); }

.head-actions { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }

.filter-btn {
  height: 30px;
  padding: 0 12px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all 0.12s ease;
  font-family: var(--font-body);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}
.filter-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }
.filter-btn.active { background: var(--color-primary-light); border-color: var(--color-primary); color: var(--color-primary); font-weight: 600; }

.cat-open-btn {
  display: none;
  height: 30px; padding: 0 12px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  cursor: pointer;
  font-family: var(--font-body);
}
.cat-open-btn.active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

.stat-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 18px; }
.stat-card {
  position: relative;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  box-shadow: var(--glass-shadow);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  overflow: hidden;
}
.stat-card::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.7), transparent); }
.stat-card:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08); }
.stat-card .stat-label { font-size: var(--font-size-xs); color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 2px; }
.stat-card .stat-value { font-family: var(--font-display); font-size: 18px; font-weight: 700; color: var(--color-primary); }
.stat-card .stat-sub { font-size: var(--font-size-xs); color: var(--color-text-muted); margin-top: 2px; }

/* article list */
.list-body { flex: 1; min-height: 0; overflow-y: auto; padding-right: 4px; padding-bottom: 20px; }

.article-item {
  position: relative;
  display: flex;
  gap: 16px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(8px) saturate(150%);
  -webkit-backdrop-filter: blur(8px) saturate(150%);
  border: 1px solid rgba(219, 225, 244, 0.5);
  border-radius: var(--radius-md);
  padding: 14px;
  margin-bottom: 10px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
}
.article-item::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.7), transparent); }
.article-item:hover { border-color: rgba(37, 99, 235, 0.5); box-shadow: 0 6px 20px rgba(0, 0, 0, 0.06); transform: translateY(-1px); }
.article-cover { width: 148px; height: 92px; border-radius: var(--radius-sm); flex-shrink: 0; display: flex; align-items: center; justify-content: center; color: rgba(255, 255, 255, 0.92); overflow: hidden; }
.article-cover img { width: 100%; height: 100%; object-fit: cover; }
.article-cover svg { width: 30px; height: 30px; }
.cover-1 { background: linear-gradient(135deg, #2563eb, #7c3aed); }
.cover-2 { background: linear-gradient(135deg, #0ea5e9, #2563eb); }
.cover-3 { background: linear-gradient(135deg, #059669, #0ea5e9); }
.cover-4 { background: linear-gradient(135deg, #f59e0b, #ef4444); }
.cover-5 { background: linear-gradient(135deg, #6366f1, #2563eb); }
.cover-6 { background: linear-gradient(135deg, #14b8a6, #059669); }
.article-main { flex: 1; min-width: 0; }
.article-title { font-family: var(--font-display); font-size: var(--font-size-lg); font-weight: 700; color: var(--color-text-primary); margin-bottom: 4px; line-height: 1.4; }
.article-item:hover .article-title { color: var(--color-primary); }
.article-summary { font-size: var(--font-size-base); color: var(--color-text-secondary); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 8px; }
.article-meta { display: flex; align-items: center; gap: 12px; font-size: var(--font-size-xs); color: var(--color-text-muted); flex-wrap: wrap; }
.meta-tag { background: var(--color-primary-light); color: var(--color-primary); padding: 1px 9px; border-radius: 99px; font-weight: 600; }
.meta-pill { display: inline-flex; align-items: center; gap: 4px; }
.meta-pill svg { width: 12px; height: 12px; }

/* download list */
.download-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(8px) saturate(150%);
  -webkit-backdrop-filter: blur(8px) saturate(150%);
  border: 1px solid rgba(219, 225, 244, 0.5);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  margin-bottom: 10px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
}
.download-item::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.7), transparent); }
.download-item:hover { border-color: rgba(37, 99, 235, 0.5); box-shadow: 0 6px 20px rgba(0, 0, 0, 0.06); transform: translateY(-1px); }
.dl-icon { width: 46px; height: 46px; border-radius: 12px; background: var(--color-primary-light); color: var(--color-primary); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.dl-icon svg { width: 22px; height: 22px; }
.dl-main { flex: 1; min-width: 0; }
.dl-top { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.dl-name { font-family: var(--font-display); font-size: var(--font-size-lg); font-weight: 700; color: var(--color-text-primary); }
.dl-version { font-size: var(--font-size-xs); font-weight: 700; color: #fff; background: var(--color-primary); padding: 1px 8px; border-radius: 4px; letter-spacing: 0.4px; }
.dl-version.beta { background: var(--color-accent-orange); }
.dl-sub { display: flex; align-items: center; gap: 14px; margin-top: 3px; font-size: var(--font-size-xs); color: var(--color-text-muted); flex-wrap: wrap; }
.dl-note { display: none; font-size: var(--font-size-xs); color: var(--color-text-secondary); margin-top: 4px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 480px; }
.btn-download {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 18px;
  border-radius: 9px;
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.12s ease;
  font-family: var(--font-body);
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 3px 10px rgba(37, 99, 235, 0.3);
  flex-shrink: 0;
  text-decoration: none;
}
.btn-download:hover { background: var(--color-primary-hover); box-shadow: 0 5px 16px rgba(37, 99, 235, 0.4); transform: translateY(-1px); color: #fff; }
.btn-download svg { width: 15px; height: 15px; }
.btn-download.outline { background: transparent; color: var(--color-text-secondary); border: 1px solid var(--color-border); box-shadow: none; }
.btn-download.outline:hover { border-color: var(--color-primary); color: var(--color-primary); }

/* demo grid */
.demo-grid { flex: 1; min-height: 0; overflow-y: auto; display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; padding-right: 4px; padding-bottom: 20px; align-content: start; }
.demo-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); overflow: hidden; cursor: pointer; transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1); text-decoration: none; color: inherit; }
.demo-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: var(--color-primary); }
.demo-thumb { position: relative; height: 128px; display: flex; align-items: center; justify-content: center; color: rgba(255, 255, 255, 0.95); overflow: hidden; }
.demo-thumb img { width: 100%; height: 100%; object-fit: contain; }
.demo-thumb > svg { width: 36px; height: 36px; }
.demo-thumb .play-badge { position: absolute; right: 10px; top: 10px; width: 26px; height: 26px; border-radius: 50%; background: rgba(0, 0, 0, 0.35); backdrop-filter: blur(6px); display: flex; align-items: center; justify-content: center; }
.demo-thumb .play-badge svg { width: 12px; height: 12px; margin-left: 1px; }
.demo-thumb .dur-badge { position: absolute; right: 10px; bottom: 10px; font-size: var(--font-size-xs); color: #fff; background: rgba(0, 0, 0, 0.45); padding: 1px 8px; border-radius: 99px; backdrop-filter: blur(6px); }
.demo-thumb .type-badge { position: absolute; left: 10px; top: 10px; font-size: var(--font-size-xs); font-weight: 600; color: #fff; padding: 2px 10px; border-radius: 99px; background: linear-gradient(135deg, var(--color-primary), #60a5fa); box-shadow: 0 2px 8px rgba(37, 99, 235, 0.4); }
.demo-thumb .type-badge.guide { background: linear-gradient(135deg, #059669, #34d399); }
.demo-thumb .type-badge.online { background: linear-gradient(135deg, #ea580c, #fbbf24); }
.demo-body { padding: 12px 14px 14px; }
.demo-name { font-family: var(--font-display); font-size: var(--font-size-lg); font-weight: 700; color: var(--color-text-primary); margin-bottom: 4px; }
.demo-desc { font-size: var(--font-size-sm); color: var(--color-text-secondary); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 8px; min-height: 34px; }
.demo-meta { display: flex; align-items: center; gap: 10px; font-size: var(--font-size-xs); color: var(--color-text-muted); }

/* pagination */
.pagination { display: flex; align-items: center; gap: 6px; justify-content: center; padding: 16px 0; flex-wrap: wrap; }
.pagination a, .pagination span {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 30px; height: 30px;
  padding: 0 8px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all 0.12s;
}
.pagination a:hover { border-color: var(--color-primary); color: var(--color-primary); }
.pagination li.active span { background: var(--color-primary); border-color: var(--color-primary); color: #fff; font-weight: 600; }
.pagination .disabled { opacity: 0.45; pointer-events: none; }

/* empty */
.list-empty { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 60px 20px; color: var(--color-text-muted); text-align: center; }
.list-empty svg { width: 42px; height: 42px; opacity: 0.18; margin-bottom: 10px; }
.list-empty p { font-size: var(--font-size-base); }

/* ================= Detail ================= */
.detail-wrap { width: 100%; margin: 0 auto; }
.detail-head { margin-bottom: 18px; }
.crumbs { display: flex; align-items: center; gap: 6px; font-size: var(--font-size-sm); color: var(--color-text-muted); margin-bottom: 14px; flex-wrap: wrap; }
.crumbs a { color: var(--color-text-muted); }
.crumbs a:hover { color: var(--color-primary); }
.crumbs .sep { color: var(--color-border); }
.detail-title { font-family: var(--font-display); font-size: 24px; font-weight: 800; color: var(--color-text-primary); line-height: 1.35; margin-bottom: 10px; letter-spacing: -0.3px; }
.detail-meta { display: flex; align-items: center; gap: 14px; font-size: var(--font-size-sm); color: var(--color-text-muted); flex-wrap: wrap; }
.detail-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 24px; box-shadow: var(--shadow-sm); }

.rich-content { font-size: var(--font-size-lg); color: var(--color-text-primary); line-height: 1.9; word-break: break-word; }
.rich-content h1, .rich-content h2, .rich-content h3, .rich-content h4 { font-family: var(--font-display); color: var(--color-text-primary); margin: 1.2em 0 0.5em; line-height: 1.4; }
.rich-content h1 { font-size: 1.5em; }
.rich-content h2 { font-size: 1.3em; }
.rich-content h3 { font-size: 1.15em; }
.rich-content p { margin: 0.7em 0; }
.rich-content ul, .rich-content ol { margin: 0.7em 0 0.7em 1.6em; }
.rich-content li { margin: 0.3em 0; }
.rich-content img { max-width: 100%; border-radius: var(--radius-sm); margin: 0.6em 0; }
.rich-content a { text-decoration: underline; }
.rich-content code { background: var(--color-sidebar); border-radius: 4px; padding: 2px 6px; font-size: 0.9em; }
.rich-content pre { background: #1a1d26; color: #e5e7f0; border-radius: var(--radius-sm); padding: 14px; overflow-x: auto; margin: 0.8em 0; }
.rich-content pre code { background: none; color: inherit; padding: 0; }
.rich-content blockquote { border-left: 3px solid var(--color-primary); padding-left: 14px; color: var(--color-text-secondary); margin: 0.8em 0; background: var(--color-primary-light); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; padding: 10px 14px; }
.rich-content table { border-collapse: collapse; width: 100%; margin: 0.8em 0; }
.rich-content th, .rich-content td { border: 1px solid var(--color-border); padding: 8px 12px; }
.rich-content th { background: var(--color-sidebar); font-weight: 600; }

.detail-actions { display: flex; align-items: center; gap: 10px; margin-top: 22px; padding-top: 16px; border-top: 1px solid var(--color-border-light); flex-wrap: wrap; }
.btn-ghost {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px;
  border-radius: 9px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-text-secondary);
  cursor: pointer;
  font-family: var(--font-body);
  transition: all 0.15s;
  text-decoration: none;
}
.btn-ghost:hover { border-color: var(--color-primary); color: var(--color-primary); background: var(--color-primary-light); }
.btn-ghost svg { width: 15px; height: 15px; }
.btn-ghost.on { background: var(--color-primary-light); border-color: var(--color-primary); color: var(--color-primary); }

.detail-stats { display: flex; align-items: center; gap: 16px; font-size: var(--font-size-sm); color: var(--color-text-muted); margin-top: 14px; }

/* download detail */
.dl-detail-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 24px; box-shadow: var(--shadow-sm); }
.dl-info-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px 24px; margin: 18px 0; }
.dl-info-item .k { font-size: var(--font-size-xs); color: var(--color-text-muted); margin-bottom: 2px; }
.dl-info-item .v { font-size: var(--font-size-base); color: var(--color-text-primary); font-weight: 500; word-break: break-all; }
.dl-big-btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 30px; border-radius: 11px; font-size: 16px; font-weight: 700; }

/* demo detail / player */
.demo-player {
  position: relative;
  aspect-ratio: 16/9;
  background: #0f1117;
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
}
.demo-player video { width: 100%; height: 100%; }
.demo-player .dp-center { text-align: center; cursor: pointer; }
.demo-player .dp-center .ic { width: 72px; height: 72px; border-radius: 50%; background: rgba(37, 99, 235, 0.85); display: flex; align-items: center; justify-content: center; margin: 0 auto 14px; box-shadow: 0 8px 30px rgba(37, 99, 235, 0.5); }
.demo-player .dp-center .ic svg { width: 30px; height: 30px; margin-left: 3px; }
.demo-player .dp-center p { font-size: var(--font-size-lg); font-weight: 600; }
.demo-player .dp-center small { color: rgba(255, 255, 255, 0.6); font-size: var(--font-size-sm); }
.watermark-tip { position: absolute; right: 12px; top: 10px; font-size: var(--font-size-xs); color: rgba(255, 255, 255, 0.55); background: rgba(0, 0, 0, 0.3); padding: 2px 8px; border-radius: 4px; }

/* 多视频播放器（主播放器 + 右侧视频列表） */
.demo-player-layout { display: flex; gap: 20px; flex-wrap: wrap; }
.demo-player-main { flex: 2; min-width: 0; }
.demo-player-side { flex: 1; min-width: 240px; max-width: 380px; display: flex; flex-direction: column; }
.player-desc { margin-top: 14px; font-size: var(--font-size-lg); line-height: 1.5; color: var(--color-text-primary); padding: 0 4px; }
.player-desc .player-desc-label { display: block; font-size: var(--font-size-xs); color: var(--color-text-muted); margin-bottom: 2px; }
.side-header { display: flex; align-items: center; gap: 6px; margin-bottom: 12px; font-size: var(--font-size-sm); font-weight: 600; color: var(--color-text-secondary); }
.side-header .side-count { font-weight: 400; color: var(--color-text-muted); }
.side-list { display: flex; flex-direction: column; gap: 10px; max-height: 560px; overflow-y: auto; padding-right: 4px; }
.side-list::-webkit-scrollbar { width: 4px; }
.side-list::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 4px; }
.side-item { display: flex; gap: 12px; padding: 8px 10px; background: var(--color-surface); border-radius: var(--radius-sm); cursor: pointer; transition: 0.2s; border: 1.5px solid transparent; align-items: center; box-shadow: var(--shadow-sm); }
.side-item:hover { background: var(--color-sidebar); border-color: var(--color-border); }
.side-item.active { border-color: var(--color-primary); background: var(--color-primary-light); }
.side-thumb { width: 100px; min-width: 100px; aspect-ratio: 16/9; background: var(--color-sidebar); border-radius: 6px; overflow: hidden; display: flex; align-items: center; justify-content: center; flex-shrink: 0; color: var(--color-text-muted); }
.side-thumb img, .side-thumb video { width: 100%; height: 100%; object-fit: cover; }
.side-thumb svg { width: 26px; height: 26px; }
.side-info { flex: 1; min-width: 0; }
.side-info .side-name { font-size: var(--font-size-sm); color: var(--color-text-secondary); line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.side-info .side-duration { font-size: var(--font-size-xs); color: var(--color-text-muted); margin-top: 3px; }
@media (max-width: 900px) {
  .demo-player-layout.single .demo-player-side { display: none; }
  .demo-player-side { max-width: 100%; flex: 1 1 100%; }
  .side-list { max-height: 200px; flex-direction: row; overflow-x: auto; overflow-y: hidden; flex-wrap: nowrap; padding-bottom: 8px; gap: 10px; }
  .side-item { flex: 0 0 180px; flex-direction: column; align-items: stretch; padding: 8px; }
  .side-thumb { width: 100%; min-width: unset; }
  /* 顶栏（@media 兜底，兼容无容器查询的浏览器） */
  .app-header { padding: 0 12px; gap: 8px; }
  .header-search { display: none; }
  /* 手机/平板：顶栏下方通栏搜索条（顶栏单行排版容纳不下搜索框） */
  .mobile-search { display: flex; margin: 0 12px 10px; }
}

/* ================= Auth ================= */
.auth-body { display: flex; align-items: center; justify-content: center; height: 100dvh; background: linear-gradient(160deg, #eef2ff 0%, #dbe4f5 60%, #eef2ff 100%); overflow: auto; }
.auth-card { width: 400px; max-width: 92vw; background: rgba(255, 255, 255, 0.9); backdrop-filter: blur(24px) saturate(200%); -webkit-backdrop-filter: blur(24px) saturate(200%); border: 1px solid rgba(255, 255, 255, 0.6); border-radius: var(--radius-xl); box-shadow: 0 20px 60px rgba(37, 99, 235, 0.18); padding: 34px 32px; }
.auth-card .auth-logo { display: flex; align-items: center; justify-content: center; gap: 10px; margin-bottom: 8px; }
.auth-card .auth-title { text-align: center; font-family: var(--font-display); font-size: 22px; font-weight: 800; color: var(--color-text-primary); }
.auth-card .auth-sub { text-align: center; font-size: var(--font-size-sm); color: var(--color-text-muted); margin-bottom: 22px; }
.auth-form { display: flex; flex-direction: column; gap: 14px; }
.form-item label { display: block; font-size: var(--font-size-sm); font-weight: 600; color: var(--color-text-primary); margin-bottom: 6px; }
.form-input {
  width: 100%; height: 42px;
  padding: 0 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  outline: none;
  font-family: var(--font-body);
  transition: all 0.15s;
}
.form-input:focus { border-color: var(--color-primary); box-shadow: var(--shadow-glow); }
.form-input::placeholder { color: var(--color-text-muted); }
textarea.form-input { height: auto; padding: 10px 14px; resize: vertical; min-height: 70px; }
.form-row2 { display: flex; gap: 10px; }
.form-row2 .form-input { flex: 1; }
.btn-primary {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  width: 100%; height: 44px;
  border: none; border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary), #60a5fa);
  color: #fff;
  font-size: 15px; font-weight: 700;
  cursor: pointer;
  font-family: var(--font-body);
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.35);
  transition: all 0.2s;
  text-decoration: none;
}
.btn-primary:hover { box-shadow: 0 8px 24px rgba(37, 99, 235, 0.45); transform: translateY(-1px); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }
.auth-foot { text-align: center; font-size: var(--font-size-sm); color: var(--color-text-secondary); margin-top: 18px; }
.auth-tip { background: var(--color-primary-light); border: 1px solid rgba(37, 99, 235, 0.2); color: var(--color-primary); border-radius: var(--radius-sm); padding: 9px 12px; font-size: var(--font-size-sm); margin-bottom: 4px; }
.auth-error { background: #fef2f2; border: 1px solid rgba(220, 38, 38, 0.2); color: var(--color-accent-red); border-radius: var(--radius-sm); padding: 9px 12px; font-size: var(--font-size-sm); display: none; }
.auth-error.show { display: block; }
.captcha-row { display: flex; gap: 10px; align-items: center; }
.captcha-img { height: 42px; border-radius: var(--radius-sm); border: 1px solid var(--color-border); cursor: pointer; }

/* ================= User center ================= */
.user-wrap { max-width: 860px; width: 100%; margin: 0 auto; }
.user-grid { display: grid; grid-template-columns: 260px 1fr; gap: 18px; }
.user-side-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 20px; align-self: start; }
.user-avatar-lg { width: 64px; height: 64px; border-radius: 50%; background: linear-gradient(135deg, var(--color-primary), #60a5fa); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 26px; font-weight: 800; margin-bottom: 12px; }
.user-name-lg { font-family: var(--font-display); font-size: 18px; font-weight: 700; }
.user-role-pill { display: inline-block; margin-top: 6px; font-size: var(--font-size-xs); color: var(--color-primary); background: var(--color-primary-light); padding: 2px 10px; border-radius: 99px; font-weight: 600; }
.user-menu-nav { margin-top: 16px; display: flex; flex-direction: column; gap: 2px; }
.user-menu-nav a { display: flex; align-items: center; gap: 8px; padding: 9px 12px; border-radius: 8px; font-size: var(--font-size-base); color: var(--color-text-secondary); text-decoration: none; transition: all 0.12s; }
.user-menu-nav a:hover { background: var(--color-sidebar); color: var(--color-primary); }
.user-menu-nav a.active { background: var(--color-primary-light); color: var(--color-primary); font-weight: 600; }
.user-menu-nav svg { width: 16px; height: 16px; }
.user-main-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 24px; }
.user-main-title { font-family: var(--font-display); font-size: 18px; font-weight: 700; margin-bottom: 18px; }
.user-form { max-width: 460px; display: flex; flex-direction: column; gap: 14px; }
.user-form .form-input { height: 40px; }
.fav-item { display: flex; align-items: center; gap: 12px; padding: 12px; border: 1px solid var(--color-border-light); border-radius: var(--radius-md); margin-bottom: 8px; transition: all 0.15s; text-decoration: none; color: inherit; }
.fav-item:hover { border-color: var(--color-primary); }
.fav-item .fav-ic { width: 38px; height: 38px; border-radius: 10px; background: var(--color-primary-light); color: var(--color-primary); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.fav-item .fav-ic svg { width: 18px; height: 18px; }
.fav-item .fav-main { flex: 1; min-width: 0; }
.fav-item .fav-name { font-size: var(--font-size-base); font-weight: 600; color: var(--color-text-primary); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.fav-item .fav-sub { font-size: var(--font-size-xs); color: var(--color-text-muted); }
.fav-item .fav-del { border: none; background: transparent; color: var(--color-text-muted); cursor: pointer; font-size: var(--font-size-sm); }
.fav-item .fav-del:hover { color: var(--color-accent-red); }

/* share list in user center */
.share-item { display: flex; align-items: center; gap: 12px; padding: 14px; border: 1px solid var(--color-border-light); border-radius: var(--radius-md); margin-bottom: 8px; }
.share-item .si-main { flex: 1; min-width: 0; }
.share-item .si-name { font-weight: 600; font-size: var(--font-size-base); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.share-item .si-url { font-size: var(--font-size-xs); color: var(--color-text-muted); font-family: monospace; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.share-item .si-stats { font-size: var(--font-size-xs); color: var(--color-text-muted); margin-top: 2px; }
.share-item .si-actions { display: flex; gap: 6px; flex-shrink: 0; }

/* ================= Share page ================= */
.share-body { height: 100dvh; overflow: auto; }
.share-topbar { display: flex; align-items: center; gap: 10px; padding: 14px 24px; background: var(--color-surface); border-bottom: 1px solid var(--color-border); position: sticky; top: 0; z-index: 10; }
.share-topbar .st-logo { display: flex; align-items: center; gap: 8px; font-family: var(--font-display); font-weight: 700; }
.share-topbar .st-right { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.share-guide { background: linear-gradient(135deg, var(--color-primary-light), #fff); border-bottom: 1px solid var(--color-border-light); padding: 10px 24px; display: flex; align-items: center; justify-content: center; gap: 8px; font-size: var(--font-size-sm); color: var(--color-text-secondary); }
.share-guide a { font-weight: 600; }
.share-wrap { max-width: 1280px; margin: 0 auto; padding: 24px 20px 60px; }
.share-password-card { max-width: 420px; margin: 8vh auto 0; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: 32px; box-shadow: var(--shadow-md); text-align: center; }
.share-password-card .ic { width: 56px; height: 56px; border-radius: 16px; background: var(--color-primary-light); color: var(--color-primary); display: flex; align-items: center; justify-content: center; margin: 0 auto 14px; }
.share-password-card .ic svg { width: 26px; height: 26px; }
.share-password-card h3 { font-family: var(--font-display); font-size: 18px; font-weight: 700; margin-bottom: 6px; }
.share-password-card p { font-size: var(--font-size-sm); color: var(--color-text-secondary); margin-bottom: 18px; }
.share-expired { text-align: center; padding: 10vh 20px; }
.share-expired .ic { font-size: 60px; }
.share-expired h3 { font-family: var(--font-display); font-size: 20px; font-weight: 700; margin: 14px 0 6px; }
.share-expired p { color: var(--color-text-secondary); font-size: var(--font-size-base); }

/* ================= Modal ================= */
.modal-overlay { position: fixed; inset: 0; z-index: 1000; display: flex; align-items: center; justify-content: center; background: rgba(0, 0, 0, 0.5); backdrop-filter: blur(4px); animation: fade-in 0.15s ease; }
.modal-content { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 24px; max-width: 500px; width: 92vw; box-shadow: 0 8px 40px rgba(0, 0, 0, 0.18); animation: pop-in 0.2s ease; max-height: 90vh; overflow-y: auto; }
.modal-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.modal-header h3 { font-family: var(--font-display); font-size: 17px; font-weight: 700; }
.modal-close { display: flex; align-items: center; justify-content: center; width: 28px; height: 28px; border-radius: 6px; border: none; background: transparent; cursor: pointer; color: var(--color-text-muted); transition: all 0.12s; }
.modal-close:hover { background: var(--color-sidebar); color: var(--color-text-primary); }
.modal-close svg { width: 16px; height: 16px; }
.modal-body { display: flex; flex-direction: column; gap: 14px; }
.share-form-item label { display: block; font-size: var(--font-size-sm); font-weight: 600; margin-bottom: 6px; }
.share-form-item select, .share-form-item input[type="text"], .share-form-item input[type="number"], .share-form-item input[type="password"] {
  width: 100%; height: 38px; padding: 0 12px;
  border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  font-size: var(--font-size-base); color: var(--color-text-primary);
  outline: none; font-family: var(--font-body); background: var(--color-surface);
}
.share-form-item select:focus, .share-form-item input:focus { border-color: var(--color-primary); box-shadow: var(--shadow-glow); }
.check-row { display: flex; align-items: center; gap: 8px; font-size: var(--font-size-base); color: var(--color-text-secondary); }
.check-row input { width: 16px; height: 16px; accent-color: var(--color-primary); }
.share-result { display: none; }
.share-result.show { display: flex; flex-direction: column; gap: 12px; }
.share-url-box { display: flex; gap: 8px; }
.share-url-box input { flex: 1; min-width: 0; height: 38px; padding: 0 12px; border: 1px solid var(--color-border); border-radius: var(--radius-sm); font-size: var(--font-size-sm); font-family: monospace; color: var(--color-text-primary); background: var(--color-sidebar); outline: none; }
.share-url-box .btn-primary { width: auto; height: 38px; padding: 0 18px; font-size: var(--font-size-sm); }
.share-result .hint { font-size: var(--font-size-xs); color: var(--color-text-muted); }

/* ================= Toast ================= */
.toast {
  position: fixed;
  top: 20px; left: 50%;
  transform: translate(-50%, -80px);
  z-index: 2000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px) saturate(200%);
  -webkit-backdrop-filter: blur(20px) saturate(200%);
  border: 1px solid rgba(255, 255, 255, 0.5);
  color: var(--color-text-primary);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.16);
  border-radius: 14px;
  padding: 12px 22px;
  font-size: var(--font-size-base);
  font-weight: 500;
  font-family: var(--font-body);
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
  pointer-events: none;
  max-width: 80vw;
  text-align: center;
}
.toast.show { transform: translate(-50%, 0); }

.site-footer { flex-shrink: 0; border-top: 1px solid var(--color-border); background: var(--color-sidebar); }
.site-footer-inner { max-width: 1100px; margin: 0 auto; padding: 10px 20px; display: flex; align-items: center; justify-content: center; gap: 20px; flex-wrap: wrap; font-size: 12px; color: var(--color-text-muted); }
.site-footer a { color: var(--color-text-muted); text-decoration: none; }
.site-footer a:hover { color: var(--color-primary); }

/* ================= Animations ================= */
@keyframes view-in { 0% { opacity: 0; transform: translateX(12px); } 100% { opacity: 1; transform: translateX(0); } }
@keyframes fade-in { 0% { opacity: 0; } 100% { opacity: 1; } }
@keyframes pop-in { 0% { opacity: 0; transform: translateY(12px) scale(0.97); } 100% { opacity: 1; transform: translateY(0) scale(1); } }

/* ================= Responsive ================= */
/* 手机端（@media 兜底，兼容无容器查询的浏览器；顶栏规则从 @container 并入此处） */
@media (max-width: 720px) {
  html, body { height: auto; overflow: auto; }
  #app { height: auto; min-height: 100dvh; overflow: visible; }
  .master-detail { overflow: visible; }
  .content-panel { overflow: visible; }
  /* 顶栏单行排版：logo + 模块 tab + 操作区同一排（语言按钮缩写为 EN 节省空间） */
  .app-header { height: auto; min-height: auto; flex-wrap: nowrap; padding: 8px 12px; gap: 8px; }
  .logo-text { display: none; }
  .logo { flex-shrink: 0; }
  .logo-img { max-width: 110px; height: 26px; }
  .module-tabs { flex: 1 1 auto; min-width: 0; padding: 3px; }
  .module-tab { flex: 1 1 0; min-width: 0; justify-content: center; padding: 6px 3px; font-size: 13px; }
  .header-actions { flex-shrink: 0; }
  .btn-lang { padding: 6px 8px; }
  .header-btn span { display: none; }
  .header-btn { padding: 7px; }
  .btn-login span { display: none; }
  .btn-login { padding: 7px 9px; }
  .user-chip .uc-name, .user-chip .uc-role { display: none; }
  .master-detail { flex-direction: column; }
  /* 手机端下载列表：隐藏假下载按钮，改显一行介绍 */
  .btn-download { display: none; }
  .dl-note { display: block; }
}
@container (max-width: 720px) {
  .sidebar { width: 100%; min-width: 100%; max-height: 0; overflow: hidden; border-right: none; flex: 0 0 auto; transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1); }
  .mobile-sidebar-open .sidebar { max-height: 45%; }
  .content-panel { flex: 1; min-height: 0; }
  .view { padding: 14px 14px; }
  .cat-open-btn { display: inline-flex; align-items: center; }
  .stat-cards { display: none; }
  .stat-card .stat-value { font-size: 16px; }
  .stat-card .stat-sub { display: none; }
  .article-item { gap: 10px; }
  .article-cover { width: 96px; height: 68px; }
  .article-cover svg { width: 22px; height: 22px; }
  .article-summary { -webkit-line-clamp: 1; }
  .download-item { flex-wrap: wrap; }
  .btn-download { display: none; }
  .dl-note { display: block; }
  .demo-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
  .demo-thumb { height: 96px; }
  .welcome-title { font-size: 22px; }
  .welcome-subtitle { font-size: var(--font-size-base); }
  .welcome-grid { grid-template-columns: 1fr; max-width: 320px; gap: 12px; }
  .welcome-card { padding: 20px 16px; flex-direction: row; text-align: left; gap: 14px; align-items: center; }
  .wc-icon { width: 44px; height: 44px; border-radius: 12px; }
  .wc-icon svg { width: 21px; height: 21px; }
  .wc-desc { flex: 1; }
  .wc-link { display: none; }
  .dl-info-grid { grid-template-columns: 1fr; }
  .user-grid { grid-template-columns: 1fr; }
  .detail-card { padding: 16px; }
  .detail-title { font-size: 20px; }
}
@container (max-width: 380px) {
  .demo-grid { grid-template-columns: 1fr; }
}

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