/* ═══════════════════════════════════════════
   3DSCM DESIGN SYSTEM - Geometric Modern
   ══ 3D打印工业感 · 克制精致 · 高可读性 ══
   ═══════════════════════════════════════════ */

:root {
  --radius: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  /* Color Tokens */
  --bg: #faf8f5;
  --bg-alt: #f2efe9;
  --card: #ffffff;
  --border: #e0dcd5;
  --border-light: #eeeeea;
  --border-dark: #c4bfb5;
  --text: #1a1814;
  --text-secondary: #5c5548;
  --text-muted: #9a9487;
  --accent: #E85D2C;
  --accent-hover: #C94A1C;
  --accent-light: #FFF0E8;
  --accent-border: #FFD4BF;
  --green: #2d8a4e;
  --green-bg: #e8f5ec;
  --green-border: #b8dcbf;
  --blue: #2563EB;
  --blue-bg: #EBF2FF;
  --blue-border: #C4D6FF;
  --amber: #B06308;
  --amber-bg: #FFF8EB;
  --amber-border: #FFE4B8;
  --red: #C53030;
  --red-bg: #FFF0F0;
  --red-border: #FFCCCC;
  --purple: #6D28D9;
  --purple-bg: #F2E8FF;
  --purple-border: #DCC0FF;

  /* Header */
  --header-bg: #1a1814;
  --header-text: #e8e4dc;
  --header-text-muted: #8c8475;
  --header-hover: #2d2923;
  --header-accent: #FF7A3D;

  /* Shadows — soft, modern */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.08);

  /* Layout */
  --max-width: 1280px;
  --nav-height: 60px;

  /* Typography */
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

/* ── Base ── */
* { margin:0; padding:0; box-sizing:border-box; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  background-image: radial-gradient(circle, var(--border) 1px, transparent 1px);
  background-size: 20px 20px;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

/* ── Accessibility ── */
.skip-link:focus { top: 16px; }
*:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 2px; }
button:focus-visible, .btn:focus-visible, input:focus-visible, select:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; } }

/* ── Header ── */
.header {
  height: var(--nav-height);
  position: sticky; top: 0; z-index: 100;
  background: var(--header-bg);
  display: flex; align-items: center; padding: 0 32px;
  border-bottom: 3px solid var(--accent);
}
.header-inner {
  max-width: var(--max-width); width: 100%; margin:0 auto;
  display: flex; align-items: center; justify-content: space-between;
}
.logo {
  display:flex; align-items:center; gap:10px; cursor:pointer;
  font-weight:800; font-size:17px;
  color: var(--header-text); letter-spacing:-0.3px;
}
.logo-icon {
  width:34px; height:34px; background: var(--accent); color: #fff;
  display:flex; align-items:center; justify-content:center;
  font-weight:800; font-size:14px; border-radius: var(--radius);
}
.logo-sub {
  font-size:10px; color: var(--header-text-muted);
  font-weight:400; letter-spacing:0.5px; display:block; margin-top:2px;
}
.nav { display:flex; gap:2px; }
.nav-link {
  padding:7px 14px; border:none; background:none; font-size:13px; cursor:pointer;
  color: var(--header-text-muted); font-weight:500; transition:all 0.15s;
  text-decoration:none; white-space:nowrap; border-radius: var(--radius);
}
.nav-link:hover { background: var(--header-hover); color: var(--header-text); }
.nav-link.active { background: var(--accent); color:#fff; }

/* ── Search Bar ── */
.search-bar {
  padding:16px 32px; background: var(--card);
  position:sticky; top:60px; z-index:99;
  border-bottom:1px solid var(--border);
}
.search-inner { max-width:var(--max-width); margin:0 auto; display:flex; gap:10px; align-items:center; }
.search-field { position:relative; flex:1; display:flex; align-items:center; min-width:0; }
.search-input {
  flex:1; width:100%; padding:10px 56px 10px 16px; border:1px solid var(--border); font-size:16px;
  outline:none; background: var(--bg); border-radius: var(--radius);
  transition: border-color 0.15s;
}
/* 移动端搜索输入框 16px 防止 iOS 自动缩放 */
@media (max-width:768px) {
  .search-input { font-size:16px; padding:11px 52px 11px 14px; }
}
.search-input:focus { border-color: var(--accent); background: #fff; }
.search-btn {
  padding:10px 20px; background: var(--accent); color:#fff; border:none;
  font-size:14px; font-weight:600; cursor:pointer; white-space:nowrap; flex-shrink:0;
  border-radius: var(--radius); transition: background 0.15s;
}
.search-btn:hover { background: var(--accent-hover); }
/* AI 切换：内嵌于搜索框右侧，激活时变紫 */
.search-ai-toggle {
  position:absolute; right:6px; top:50%; transform:translateY(-50%);
  padding:5px 11px; border:1px solid var(--border); font-size:12px;
  font-weight:600; cursor:pointer; white-space:nowrap;
  background: var(--bg); color: var(--text-muted);
  display:flex; align-items:center; gap:4px; border-radius:14px;
  transition: all 0.15s;
}
.search-ai-toggle:hover { border-color: var(--accent); color: var(--accent); }
.search-ai-toggle.active { background: var(--accent); color:#fff; border-color: var(--accent); }
.ai-badge {
  font-size:11px; padding:1px 6px; background: #6366f1; color:#fff;
  border-radius: 10px; font-weight:600; line-height:1.5;
}
.search-ai-toggle.active .ai-badge { background: rgba(255,255,255,0.28); color:#fff; }
.ai-result-header {
  padding:10px 14px; margin-bottom:12px;
  background: #6366f1; color:#fff; font-size:13px;
  display:flex; align-items:center; gap:8px; border-radius: var(--radius);
}
.ai-reason { font-size:11px; color: var(--text-muted); margin-top:4px; line-height:1.4; }
.ai-reason-box {
  background: var(--bg-alt); border:1px solid var(--border); border-radius: var(--radius);
  padding:12px 14px; margin-bottom:16px; font-size:13px; color:var(--text-secondary); line-height:1.6;
}
.ai-score {
  font-size:10px; padding:2px 6px; background: var(--bg-alt);
  color: var(--text-muted); border-radius: 10px;
}

/* ── Content ── */
.content { max-width:var(--max-width); margin:0 auto; padding:32px 32px 80px; }
.section-title { font-size:20px; font-weight:700; margin-bottom:4px; }
.section-sub { font-size:13px; color:var(--text-muted); margin-bottom:24px; }
.view { display:none; }
.view.active { display:block; }

/* ── Hero ── */
.hero { padding:56px 0 40px; text-align:center; }
.hero h1 { font-size:36px; font-weight:800; letter-spacing:-1px; line-height:1.3; margin-bottom:12px; }
.hero h1 span { color: var(--accent); }
.hero p { font-size:16px; color: var(--text-secondary); max-width:600px; margin:0 auto 32px; line-height:1.7; }
.hero-actions { display:flex; justify-content:center; gap:14px; flex-wrap:wrap; }
.btn {
  display:inline-flex; align-items:center; gap:8px;
  padding:11px 24px; font-size:14px; font-weight:600; cursor:pointer; border:none;
  text-decoration:none; border-radius: var(--radius);
  transition: all 0.15s;
}
.btn-primary { background: var(--accent); color:#fff; }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-outline { background: var(--card); color: var(--accent); border:1.5px solid var(--accent-border); }
.btn-outline:hover { background: var(--accent-light); transform: translateY(-1px); }
.btn-sm { padding:6px 14px; font-size:12px; font-weight:500; }

/* ── Stats ── */
.stats-grid {
  display:grid; grid-template-columns:repeat(auto-fit, minmax(160px,1fr));
  gap:16px; padding:0 0 48px;
}
.stat-card {
  background: var(--card); border:1px solid var(--border);
  border-radius: var(--radius-md); padding:20px; text-align:center;
  box-shadow: var(--shadow-sm); transition: all 0.15s;
}
.stat-card:hover { box-shadow: var(--shadow-md); transform: translateY(-1px); }
.stat-value {
  font-family: var(--font-mono); font-size:28px; font-weight:600;
  color: var(--accent);
}

/* ── Home sections ── */
.home-section { margin-bottom:40px; }
.cap-grid {
  display:grid; grid-template-columns:repeat(auto-fit, minmax(220px,1fr)); gap:16px;
}
.cap-card {
  background: var(--card); border:1px solid var(--border); border-radius: var(--radius-lg);
  padding:22px; cursor:pointer; transition: all 0.18s; box-shadow: var(--shadow-sm);
}
.cap-card:hover { border-color: var(--accent); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.cap-icon { font-size:30px; margin-bottom:10px; }
.cap-title { font-size:16px; font-weight:700; color: var(--text); margin-bottom:6px; }
.cap-desc { font-size:13px; color: var(--text-secondary); line-height:1.6; }
.how-steps { display:grid; grid-template-columns:repeat(auto-fit, minmax(220px,1fr)); gap:16px; }
.how-step {
  background: var(--card); border:1px solid var(--border); border-radius: var(--radius-lg);
  padding:22px; position:relative;
}
.how-num {
  width:34px; height:34px; border-radius:50%; background: var(--accent); color:#fff;
  display:flex; align-items:center; justify-content:center; font-weight:700; font-size:16px;
  margin-bottom:12px;
}
.how-title { font-size:15px; font-weight:700; color: var(--text); margin-bottom:6px; }
.how-desc { font-size:13px; color: var(--text-secondary); line-height:1.6; }
@media (max-width: 600px) {
  .cap-grid, .how-steps { grid-template-columns: 1fr 1fr; }
  .cap-card { padding:16px; }
  .cap-icon { font-size:24px; }
  .cap-title { font-size:14px; }
  .cap-desc { font-size:12px; }
}
.stat-label { font-size:12px; color:var(--text-muted); margin-top:4px; }

/* ── Cards ── */
.cards-grid {
  display:grid; grid-template-columns:repeat(auto-fill, minmax(280px,1fr));
  gap:16px; margin-bottom:32px;
}
.card {
  background: var(--card); border:1px solid var(--border);
  border-radius: var(--radius-md); padding:20px;
  transition: all 0.15s; cursor:pointer;
  box-shadow: var(--shadow-sm);
  position: relative;
  display: flex; flex-direction: column;
}
.card:hover {
  border-color: var(--accent-border);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.card-badge {
  display:inline-block; padding:2px 8px; font-size:11px; font-weight:600;
  margin-bottom:10px; border-radius: 3px;
}
.card-badge.pla { background: var(--green-bg); color: var(--green); }
.card-badge.petg { background: var(--blue-bg); color: var(--blue); }
.card-badge.abs { background: var(--amber-bg); color: var(--amber); }
.card-badge.asa { background: var(--accent-light); color: var(--accent); }
.card-badge.tpu { background: var(--purple-bg); color: var(--purple); }
.card-badge.default { background: var(--bg-alt); color: var(--text-secondary); }
.card-title { font-size:15px; font-weight:600; margin-bottom:4px; line-height:1.4; }
.card-brand { font-size:12px; color:var(--text-muted); }
.card-specs {
  display:flex; gap:12px; margin-top:12px; flex-wrap:wrap;
  font-size:12px; color:var(--text-secondary);
}
.card-specs span {
  white-space: nowrap;
}
.card-price {
  font-size:17px; font-weight:700; color: var(--accent); margin-top:12px;
}
.card-price small { font-size:11px; font-weight:400; color:var(--text-muted); }
.card-footer {
  display:flex; justify-content:space-between; align-items:center;
  margin-top:auto; padding-top:12px; border-top:1px solid var(--border-light);
}

/* ── Filter Pills ── */
.filter-bar { display:flex; gap:6px; margin-bottom:20px; flex-wrap:wrap; }
.filter-pill {
  padding:5px 14px; font-size:12px; font-weight:500; cursor:pointer;
  border:1px solid var(--border); background: var(--card); color: var(--text-secondary);
  border-radius: 20px; transition: all 0.15s; white-space:nowrap;
}
.filter-pill:hover { border-color: var(--accent); color: var(--accent); }
.filter-pill.active { background: var(--accent); color:#fff; border-color: var(--accent); }

/* ── Provider ── */
.provider-card .card-title { font-size:16px; }
.provider-meta { display:flex; gap:16px; margin-top:8px; font-size:12px; color:var(--text-secondary); flex-wrap:wrap; }
.provider-meta span { display:flex; align-items:center; gap:4px; }
.provider-rating { color:var(--amber); font-weight:600; }
.provider-tags { display:flex; gap:4px; margin-top:10px; flex-wrap:wrap; }
.provider-tag {
  padding:2px 8px; background:var(--bg-alt); border-radius:3px;
  font-size:11px; color:var(--text-secondary); border:1px solid var(--border);
}

/* ── Demand ── */
.demand-card .card-title { font-size:15px; }
.demand-status {
  display:inline-block; padding:2px 8px; border-radius:3px; font-size:11px; font-weight:600;
}
.demand-status.open { background: var(--green-bg); color: var(--green); }
.demand-status.closed { background: var(--bg-alt); color: var(--text-muted); }
.demand-status.assigned { background: var(--blue-bg); color: var(--blue); }
.demand-meta { display:flex; gap:12px; margin-top:10px; font-size:12px; color:var(--text-secondary); flex-wrap:wrap; }

/* ── Article ── */
.article-card {
  padding:20px; cursor:pointer; transition:background 0.15s;
  border-bottom:1px solid var(--border-light);
}
.article-card:hover { background: var(--bg-alt); }
.article-card .card-title { font-size:16px; margin-bottom:6px; }
.article-summary { font-size:13px; color:var(--text-secondary); line-height:1.6; }
.article-meta { font-size:11px; color:var(--text-muted); margin-top:8px; display:flex; gap:12px; }

/* ── Pagination ── */
.pagination { display:flex; justify-content:center; gap:6px; margin-top:32px; }
.pagination button {
  padding:7px 14px; border:1px solid var(--border); background: var(--card);
  border-radius: var(--radius); font-size:13px; cursor:pointer; color: var(--text-secondary);
  font-weight:500; transition: all 0.15s;
}
.pagination button:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.pagination button.active { background: var(--accent); color:#fff; border-color: var(--accent); }
.pagination button:disabled { opacity:0.35; cursor:not-allowed; }

/* ── Detail Modal ── */
body.modal-open { overflow:hidden; position:fixed; width:100%; }
.detail-modal {
  position:fixed; top:0; left:0; width:100%; height:100%; z-index:200;
  background:rgba(26,24,20,0.45); display:none; align-items:center; justify-content:center;
  -webkit-overflow-scrolling: touch;
}
.detail-modal.active { display:flex; }
.detail-panel {
  background: var(--card); max-width:640px; width:90%;
  max-height:85vh; overflow-y:auto; padding:32px; position:relative;
  border-radius: var(--radius-lg); box-shadow: var(--shadow-lg);
}
.detail-close {
  position:absolute; top:12px; right:16px; background:none; border:none;
  font-size:20px; cursor:pointer; color: var(--text-muted);
  width:32px; height:32px; display:flex; align-items:center; justify-content:center;
  border-radius: 50%; transition: all 0.15s;
}
.detail-close:hover { background: var(--bg-alt); color: var(--text); }
.detail-title { font-size:20px; font-weight:700; margin-bottom:8px; }
.detail-brand { font-size:14px; color:var(--text-secondary); margin-bottom:20px; }
.detail-specs { display:grid; grid-template-columns:1fr 1fr; gap:12px; margin-bottom:20px; }
.detail-spec {
  background: var(--bg-alt); padding:12px; border-radius: var(--radius);
  border:1px solid var(--border);
}
.detail-spec-label {
  font-size:10px; color:var(--text-muted); text-transform:uppercase;
  letter-spacing:0.5px; margin-bottom:2px;
}
.detail-spec-value { font-size:15px; font-weight:600; }

/* ── Forms ── */
.form-group { margin-bottom:16px; }
.form-label { display:block; font-size:13px; font-weight:600; margin-bottom:6px; color:var(--text-secondary); }
.form-input, .form-textarea, .form-select {
  width:100%; padding:10px 14px; border:1px solid var(--border);
  border-radius: var(--radius); font-size:14px; outline:none; transition:border-color 0.15s;
}
.form-input:focus, .form-textarea:focus, .form-select:focus { border-color: var(--accent); }
.form-textarea { min-height:80px; resize:vertical; }
.form-row { display:grid; grid-template-columns:1fr 1fr; gap:12px; }

/* ── Footer ── */
.footer {
  border-top:1px solid var(--border-dark); padding:40px 32px;
  background: var(--header-bg); text-align:center;
  font-size:13px; color: var(--header-text-muted);
}
.footer a { color: var(--header-accent); }

/* ── Empty ── */
.empty { text-align:center; padding:60px 20px; color:var(--text-muted); }
.empty-icon { font-size:40px; margin-bottom:12px; }
.empty p { font-size:14px; }

/* ── Responsive ── */
@media (max-width:768px) {
  .header { padding:0 16px; }
  .nav { overflow-x:auto; gap:0; }
  .nav-link { padding:6px 10px; font-size:12px; }
  .hero h1 { font-size:24px; }
  .content { padding:24px 16px 60px; }
  .cards-grid { grid-template-columns:1fr; }
  .detail-specs { grid-template-columns:1fr; }
  .form-row { grid-template-columns:1fr; }
  .stats-grid { grid-template-columns:repeat(2,1fr); }
}

/* ── Auth ── */
.auth-section { display:flex; align-items:center; gap:8px; }
.btn-login {
  padding:6px 16px; background: transparent; color: var(--header-text);
  border:1px solid var(--header-text-muted); border-radius: var(--radius);
  font-size:13px; cursor:pointer; font-weight:500; transition: all 0.15s;
}
.btn-login:hover { border-color: var(--header-accent); color: var(--header-accent); }
.btn-signup {
  padding:6px 16px; background: var(--accent); color:#fff; border:none;
  border-radius: var(--radius); font-size:13px; cursor:pointer; font-weight:500;
  transition: background 0.15s;
}
.btn-signup:hover { background: var(--accent-hover); }
.user-menu { position:relative; display:flex; align-items:center; gap:8px; cursor:pointer; padding:4px 8px; border-radius: var(--radius); transition:background 0.15s; }
.user-menu:hover { background: var(--header-hover); }
.user-avatar {
  width:30px; height:30px; background: var(--accent); color:#fff;
  display:flex; align-items:center; justify-content:center;
  font-size:13px; font-weight:600; border-radius: 50%;
}
.user-dropdown {
  position:absolute; top:42px; right:0; background: var(--card); min-width:160px;
  display:none; z-index:150; overflow:hidden;
  border:1px solid var(--border); border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}
.user-dropdown.active { display:block; }
.dropdown-item { padding:10px 16px; font-size:13px; cursor:pointer; color:var(--text-secondary); transition:background 0.1s; display:flex; align-items:center; gap:8px; }
.dropdown-item:hover { background:var(--bg-alt); color:var(--text); }
.dropdown-divider { height:1px; background:var(--border-light); margin:4px 0; }
.auth-tabs { display:flex; margin-bottom:24px; border-bottom:2px solid var(--border); }
.auth-tab { flex:1; padding:10px; text-align:center; font-size:14px; font-weight:600; cursor:pointer; color:var(--text-muted); border:none; background:none; transition:all 0.15s; }
.auth-tab.active { color: var(--accent); border-bottom:2px solid var(--accent); margin-bottom:-2px; }
.auth-error { padding:8px 12px; background:var(--red-bg); color:var(--red); border-radius:var(--radius); font-size:12px; margin-bottom:12px; display:none; border:1px solid var(--red-border); }

/* ── Filter Panel ── */
.filter-panel {
  background: var(--bg-alt); border:1px solid var(--border);
  border-radius: var(--radius-md); padding:16px 20px; margin-bottom:20px; display:none;
}
.filter-panel.active { display:block; }
.filter-row { display:flex; flex-wrap:wrap; gap:10px 20px; align-items:flex-end; margin-bottom:12px; }
.filter-row:last-child { margin-bottom:0; }
.filter-label {
  font-size:11px; font-weight:600; color:var(--text-muted);
  text-transform:uppercase; letter-spacing:0.3px; margin-bottom:4px; display:block;
}
.filter-group { display:flex; flex-direction:column; min-width:140px; }
.filter-input {
  padding:7px 10px; border:1px solid var(--border); border-radius:var(--radius);
  font-size:13px; outline:none; background: var(--card); width:90px;
  transition: border-color 0.15s;
}
.filter-input:focus { border-color: var(--accent); }
.filter-check-group { display:flex; flex-wrap:wrap; gap:4px; max-width:600px; }
.filter-chip {
  padding:3px 10px; font-size:11px; font-weight:500; cursor:pointer;
  border:1px solid var(--border); background: var(--card); color: var(--text-secondary);
  border-radius: 16px; transition: all 0.15s; white-space:nowrap; user-select:none;
}
.filter-chip:hover { border-color: var(--accent); color: var(--accent); }
.filter-chip.active { background: var(--accent); color:#fff; border-color: var(--accent); }
.filter-toggle {
  display:inline-flex; align-items:center; gap:5px; padding:6px 14px;
  border:1px solid var(--border); border-radius: 20px;
  font-size:12px; font-weight:500; cursor:pointer;
  background: var(--card); color: var(--text-secondary);
  transition: all 0.15s;
}
.filter-toggle:hover { border-color: var(--accent); color: var(--accent); }
.filter-toggle .arrow { transition:transform 0.15s; font-size:10px; }
.filter-toggle.open .arrow { transform:rotate(180deg); }
.filter-active-tags { display:flex; flex-wrap:wrap; gap:6px; margin-bottom:12px; }
.filter-tag {
  display:inline-flex; align-items:center; gap:4px; padding:3px 10px;
  background: var(--accent-light); border:1px solid var(--accent-border);
  border-radius: 16px; font-size:11px; color: var(--accent); font-weight:500;
}
.filter-tag .remove { cursor:pointer; font-size:13px; opacity:0.6; margin-left:2px; }
.filter-tag .remove:hover { opacity:1; }
.filter-actions { display:flex; gap:8px; justify-content:flex-end; padding-top:8px; border-top:1px solid var(--border); margin-top:8px; }
.filter-result-count { font-size:12px; color:var(--text-muted); margin-bottom:12px; }

/* Sort Selector */
.sort-select {
  padding:6px 14px; font-size:12px; font-weight:500;
  border:1px solid var(--border); background: var(--card); border-radius: 20px;
  color: var(--text-secondary); cursor: pointer; outline:none;
  transition: all 0.15s;
  appearance: none; -webkit-appearance: none;
  background-image: url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' width='8' height='6'><path d='M0 0l4 6 4-6z' fill='%23999'/></svg>");
  background-repeat: no-repeat; background-position: right 10px center;
  padding-right: 28px;
}
.sort-select:hover { border-color: var(--accent); }
.sort-select:focus { border-color: var(--accent); }

/* ── Compare ── */
.cmp-checkbox {
  position:absolute; top:12px; right:12px; width:20px; height:20px;
  border:2px solid var(--border); border-radius: 3px; cursor:pointer;
  display:flex; align-items:center; justify-content:center; font-size:11px;
  color:transparent; z-index:2; transition: all 0.15s;
}
.card.compare-mode { position:relative; }
.card.compare-selected { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-border); }
.card.compare-selected .cmp-checkbox { background: var(--accent); border-color: var(--accent); color:#fff; }
.cmp-bar {
  position:fixed; bottom:0; left:0; right:0; background: var(--header-bg);
  border-top:3px solid var(--accent); z-index:150; padding:14px 32px;
  display:none; align-items:center; justify-content:center; gap:16px; flex-wrap:wrap;
}
.cmp-bar.active { display:flex; }
.cmp-bar-text { font-size:14px; font-weight:600; color: var(--header-text); }
.cmp-bar-items { display:flex; gap:8px; }
.cmp-bar-chip {
  display:inline-flex; align-items:center; gap:4px; padding:4px 12px;
  background: rgba(255,255,255,0.1); border:1px solid var(--header-text-muted);
  border-radius: 16px; font-size:12px; color: var(--header-text); font-weight:500;
}
.cmp-bar-chip .close { cursor:pointer; font-size:14px; opacity:0.6; }
.cmp-bar-chip .close:hover { opacity:1; }
.btn-cmp {
  padding:8px 20px; border-radius: var(--radius); font-size:13px;
  font-weight:600; cursor:pointer; border:none; transition: all 0.15s;
}
.btn-cmp-go { background: var(--accent); color:#fff; }
.btn-cmp-go:hover:not(:disabled) { background: var(--accent-hover); }
.btn-cmp-go:disabled { opacity:0.4; cursor:not-allowed; }
.btn-cmp-clear { background: transparent; color: var(--header-text-muted); border:1px solid var(--header-text-muted); }

/* ── Compare Table ── */
.cmp-table-wrap { overflow-x:auto; margin:0 -8px; }
.cmp-table { width:100%; border-collapse:collapse; font-size:13px; }
.cmp-table th, .cmp-table td { padding:10px 14px; text-align:left; border-bottom:1px solid var(--border-light); }
.cmp-table th {
  font-size:11px; color:var(--text-muted); font-weight:600;
  text-transform:uppercase; letter-spacing:0.3px;
  background: var(--bg-alt); position:sticky; top:0;
}
.cmp-table td { color:var(--text); }
.cmp-table .cmp-name { font-size:15px; font-weight:700; color: var(--accent); }
.cmp-table .cmp-brand { font-size:12px; color:var(--text-muted); }
.cmp-table tr:nth-child(even) td { background: var(--bg-alt); }
.cmp-best { color: var(--green); font-weight:600; }
.cmp-row-label { font-size:11px; font-weight:600; color:var(--text-muted); white-space:nowrap; }
.cmp-header-row th { border-bottom:2px solid var(--accent); padding:16px 14px 12px; }

/* ── Animations ── */
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1);} 50%{opacity:0.6;transform:scale(1.1);} }

/* ── Developer Center ── */
.dev-layout { display:grid; grid-template-columns: 1fr 360px; gap:20px; align-items:start; }
.dev-main { display:flex; flex-direction:column; gap:20px; }
.dev-side { position:sticky; top:84px; }
.dev-card {
  background: var(--card); border:1px solid var(--border); border-radius: var(--radius-lg);
  padding:24px; box-shadow: var(--shadow);
}
.dev-card .detail-brand { font-size:16px; font-weight:700; color: var(--text); margin-bottom:4px; }
@media (max-width: 880px) {
  .dev-layout { grid-template-columns: 1fr; }
  .dev-side { position:static; }
}

/* ── AI Recommend ── */
.recommend-box {
  background: var(--card); border:1px solid var(--border); border-radius: var(--radius-lg);
  padding: 24px; margin-bottom: 24px; box-shadow: var(--shadow);
}
.recommend-input {
  width:100%; padding:14px 16px; border:1px solid var(--border); font-size:15px;
  outline:none; background: var(--bg); border-radius: var(--radius);
  font-family: var(--font-body); resize:vertical; transition: border-color 0.15s;
}
.recommend-input:focus { border-color: var(--accent); background:#fff; }
.recommend-examples { margin-top:12px; display:flex; flex-wrap:wrap; gap:6px; align-items:center; }

.recommend-card {
  background: var(--card); border:1px solid var(--border); border-radius: var(--radius-lg);
  padding: 20px 24px; margin-bottom: 16px; box-shadow: var(--shadow);
  display: grid; grid-template-columns: 1fr auto; gap: 20px; align-items: start;
}
.recommend-card-header { display:flex; align-items:center; gap:10px; margin-bottom:8px; flex-wrap:wrap; }
.recommend-rank {
  width:28px; height:28px; border-radius:50%; display:flex; align-items:center; justify-content:center;
  font-weight:800; font-size:14px; color:#fff; flex-shrink:0;
}
.recommend-score {
  font-size:13px; font-weight:700; padding:3px 10px; border-radius: var(--radius);
  background: var(--accent-light); color: var(--accent); border:1px solid var(--accent-border);
}
.recommend-reasons { display:flex; flex-wrap:wrap; gap:6px; margin-top:10px; }
.reason-tag {
  font-size:12px; padding:3px 10px; border-radius: var(--radius);
  background: var(--green-bg); color: var(--green); border:1px solid var(--green-border);
}
.warning-tag {
  font-size:12px; padding:3px 10px; border-radius: var(--radius);
  background: var(--amber-bg); color: var(--amber); border:1px solid var(--amber-border);
}
.recommend-params {
  background: var(--bg-alt); border-radius: var(--radius); padding:12px 16px;
  font-size:13px; color: var(--text-secondary); min-width:200px;
}
.recommend-params-title { font-size:11px; font-weight:700; text-transform:uppercase; letter-spacing:0.5px; color: var(--text-muted); margin-bottom:6px; }
.recommend-params li { margin-left:14px; margin-top:4px; }

/* ── Compatibility Check ── */
.compat-box {
  background: var(--card); border:1px solid var(--border); border-radius: var(--radius-lg);
  padding: 24px; margin-bottom: 24px; box-shadow: var(--shadow);
  display: flex; gap: 16px; align-items: flex-end; flex-wrap: wrap;
}
.compat-select-group { flex:1; min-width:200px; }
.compat-select {
  width:100%; padding:10px 14px; border:1px solid var(--border); font-size:14px;
  outline:none; background: var(--bg); border-radius: var(--radius); cursor:pointer;
}
.compat-select:focus { border-color: var(--accent); }
.compat-select:disabled { opacity:0.5; }

.compat-result {
  background: var(--card); border:1px solid var(--border); border-radius: var(--radius-lg);
  padding: 24px; box-shadow: var(--shadow);
}
.compat-verdict {
  display:flex; align-items:center; gap:12px; padding:16px 20px; border-radius: var(--radius-lg);
  margin-bottom:20px; font-size:16px; font-weight:700;
}
.compat-verdict.pass { background: var(--green-bg); color: var(--green); border:1px solid var(--green-border); }
.compat-verdict.fail { background: var(--red-bg); color: var(--red); border:1px solid var(--red-border); }
.compat-verdict.warn { background: var(--amber-bg); color: var(--amber); border:1px solid var(--amber-border); }
.compat-verdict-icon { font-size:28px; }

.compat-check-list { display:flex; flex-direction:column; gap:10px; }
.compat-check-item {
  display:flex; align-items:center; gap:12px; padding:12px 16px;
  border-radius: var(--radius); border:1px solid var(--border-light); background: var(--bg);
}
.compat-check-item.pass { border-color: var(--green-border); background: var(--green-bg); }
.compat-check-item.fail { border-color: var(--red-border); background: var(--red-bg); }
.compat-check-icon { font-size:18px; flex-shrink:0; }
.compat-check-name { font-weight:600; font-size:14px; min-width:100px; }
.compat-check-detail { font-size:13px; color: var(--text-secondary); flex:1; }

.compat-warnings { margin-top:16px; }
.compat-warning-item {
  display:flex; gap:8px; padding:10px 14px; margin-bottom:6px;
  background: var(--amber-bg); border:1px solid var(--amber-border); border-radius: var(--radius);
  font-size:13px; color: var(--amber);
}
.compat-suggestions { margin-top:16px; }
.compat-suggestion-item {
  display:flex; gap:8px; padding:10px 14px; margin-bottom:6px;
  background: var(--blue-bg); border:1px solid var(--blue-border); border-radius: var(--radius);
  font-size:13px; color: var(--blue);
}

/* ── Favorite Button ── */
.fav-btn {
  position:absolute; top:8px; right:8px; width:30px; height:30px;
  border:none; background: rgba(255,255,255,0.9); border-radius:50%; cursor:pointer;
  display:flex; align-items:center; justify-content:center; font-size:15px;
  transition: all 0.2s; z-index:5;
}
.fav-btn:hover { background:#fff; transform:scale(1.15); }
.fav-btn.favorited { color: var(--accent); }

/* ── Rank Badge ── */
.rank-badge {
  position:absolute; top:8px; left:8px; z-index:5;
  min-width:28px; height:28px; padding:0 6px;
  border-radius:8px; font-size:12px; font-weight:700;
  display:flex; align-items:center; justify-content:center;
  background:var(--bg-alt); color:var(--text-secondary);
  border:1px solid var(--border);
}
.rank-badge.rank-top {
  background:linear-gradient(135deg, #fff8e1, #ffe0b2);
  border-color:#ffb74d; color:#e65100; font-size:16px;
  box-shadow:0 2px 8px rgba(255,152,0,0.2);
}

/* ═══════════════════════════════════════════════════════════════════════
   Responsive Design - 移动端响应式适配
   ═══════════════════════════════════════════════════════════════════════ */

/* ── 平板 (≤1024px) ── */
@media (max-width: 1024px) {
  :root { --max-width: 100%; }
  .content { padding: 24px 20px 60px; }
  .header-inner { padding: 0 16px; }
  .hero h1 { font-size: 28px; }
  .hero p { font-size: 14px; }
  .cards-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .detail-panel { width: 95%; max-width: none; }
  .search-inner { padding: 0 16px; }
  .filter-panel-inner { grid-template-columns: repeat(2, 1fr); }
  .compat-grid { grid-template-columns: 1fr; }
}

/* ── 手机 (≤768px) ── */
@media (max-width: 768px) {
  /* 基础布局 */
  .header { padding: 0 12px; height: auto; }
  .header-inner { flex-wrap: wrap; padding: 8px 0; gap: 8px; }
  .nav { overflow-x: auto; gap: 0; -webkit-overflow-scrolling: touch; padding-bottom: 4px; }
  .nav::-webkit-scrollbar { display: none; }
  .nav-link { padding: 8px 12px; font-size: 13px; white-space: nowrap; flex-shrink: 0; }
  .content { padding: 16px 12px 60px; }
  .footer { padding: 16px 12px; font-size: 12px; }

  /* Hero */
  .hero h1 { font-size: 22px; line-height: 1.3; }
  .hero p { font-size: 13px; max-width: 100%; }
  .hero { padding: 28px 0 20px; }

  /* 搜索栏：保持一行紧凑，AI 内嵌输入框 */
  .search-bar { padding: 10px 12px; }
  .search-inner { flex-direction: row; gap: 8px; padding: 0; align-items:center; }
  .search-field { flex:1; min-width:0; }
  .search-input { font-size: 14px; padding: 11px 52px 11px 14px; }
  .search-btn { padding: 11px 18px; flex-shrink:0; }
  .search-ai-toggle { right:5px; padding:5px 9px; }

  /* 卡片网格 */
  .cards-grid { grid-template-columns: 1fr; gap: 10px; }
  .card { padding: 12px; }
  .card h3 { font-size: 14px; }
  .card-desc { font-size: 12px; }

  /* 统计 */
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .stat-card { padding: 12px; }
  .stat-value { font-size: 22px; }
  .stat-label { font-size: 11px; }

  /* 详情面板 */
  .detail-panel { width: 100%; max-width: none; margin: 0; border-radius: 16px 16px 0 0; max-height: 90vh; }
  .detail-specs { grid-template-columns: 1fr; gap: 6px; }
  .detail-specs dt { font-size: 11px; }
  .detail-specs dd { font-size: 13px; }
  .detail-close { top: 8px; right: 8px; width: 32px; height: 32px; font-size: 16px; }

  /* 筛选标签：手机端保持横排可滚动，避免竖排堆叠占满屏幕 */
  .filter-bar { flex-direction: row; flex-wrap: nowrap; overflow-x: auto; -webkit-overflow-scrolling: touch; gap: 6px; padding-bottom: 4px; }
  .filter-bar::-webkit-scrollbar { display: none; }
  .filter-row { flex-wrap: wrap; gap: 6px; }
  .filter-pill { font-size: 12px; padding: 5px 10px; flex-shrink: 0; }
  .filter-panel-inner { grid-template-columns: 1fr; gap: 10px; padding: 12px; }
  .filter-group { min-width: 0; }
  .filter-check-group { max-width: 100%; }

  /* 表单 */
  .form-row { grid-template-columns: 1fr; }
  .form-input, .form-select { font-size: 14px; padding: 10px 12px; }
  .form-label { font-size: 13px; }

  /* 对比 */
  .cmp-bar { flex-wrap: wrap; gap: 6px; padding: 8px 12px; }
  .cmp-bar-text { font-size: 12px; }
  .cmp-bar-items { flex-wrap: wrap; gap: 4px; }
  .cmp-tag { font-size: 11px; padding: 2px 8px; }
  .btn-cmp-clear, .btn-cmp-go { font-size: 11px; padding: 4px 10px; }

  /* 认证弹窗 */
  .auth-tab { font-size: 13px; padding: 8px 16px; }
  #authModal .detail-panel { max-width: 100% !important; }

  /* 分页 */
  .pagination { gap: 2px; }
  .page-btn { width: 32px; height: 32px; font-size: 12px; }
  .page-info { font-size: 11px; }

  /* 管理后台表格 */
  .admin-table { font-size: 12px; }
  .admin-table th, .admin-table td { padding: 8px 6px; }
  .admin-table { display: block; overflow-x: auto; }

  /* 兼容性检测 */
  .compat-select-group { min-width: 0; flex: 1 1 100%; }
  .compat-result-card { padding: 10px; }
  .compat-check-name { min-width: 0; font-size: 12px; }
  .compat-check-detail { font-size: 11px; }

  /* 品牌/服务商卡片 */
  .brand-card { padding: 12px; }
  .brand-card .brand-logo { width: 40px; height: 40px; }
  .provider-card { padding: 12px; }

  /* 资讯 */
  .article-card h3 { font-size: 14px; }

  /* 需求 */
  .demand-card { padding: 12px; }
  .demand-card h3 { font-size: 14px; }

  /* 推荐 */
  .recommend-scenes { gap: 6px; }
  .scene-chip { font-size: 12px; padding: 6px 12px; }

  /* 用户菜单 */
  .user-menu { gap: 4px; }
  .user-name { font-size: 12px; }
  .user-avatar { width: 26px; height: 26px; }
  .dropdown-menu { right: -8px; min-width: 140px; }
  .dropdown-item { font-size: 12px; padding: 8px 14px; }
}

/* ── 小屏手机 (≤480px) ── */
@media (max-width: 480px) {
  .hero h1 { font-size: 20px; }
  .hero p { font-size: 12px; }
  .hero { padding: 20px 0 16px; }
  .content { padding: 12px 8px 50px; }
  .header-inner { padding: 6px 8px; }
  .nav-link { padding: 6px 10px; font-size: 11px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 6px; }
  .stat-card { padding: 10px; }
  .stat-value { font-size: 20px; }
  .card { padding: 10px; }
  .btn { font-size: 12px; padding: 8px 14px; }
  .logo-text { font-size: 16px; }
  .search-box input { font-size: 13px; padding: 8px 12px; }
}

/* ── 触摸优化 ── */
@media (hover: none) and (pointer: coarse) {
  /* 增大可点击区域 */
  .nav-link, .filter-pill, .btn, .scene-chip, .page-btn {
    min-height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  /* 卡片增大触摸区域 */
  .card { cursor: default; }
  /* 移除 hover 效果（触摸设备无意义） */
  .card:hover { transform: none; box-shadow: var(--shadow-sm); }
  .btn:hover { transform: none; }
}

/* ── 打印样式 ── */
@media print {
  .header, .footer, .nav, .search-bar, .cmp-bar, .filter-bar, .pagination {
    display: none !important;
  }
  .content { padding: 0; }
  .card { break-inside: avoid; box-shadow: none; border: 1px solid #ddd; }
}

/* ── 移动端汉堡菜单 ── */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 100;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--header-text);
  border-radius: 2px;
  transition: all 0.2s;
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(4px, 4px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(4px, -4px); }

@media (max-width: 768px) {
  .hamburger { display: flex; }
  .nav {
    display: none;
    flex-direction: column;
    width: 100%;
    background: var(--header-bg);
    padding: 8px 0;
    border-top: 1px solid var(--border);
  }
  .nav.open { display: flex; }
  .nav-link {
    width: 100%;
    text-align: left;
    padding: 10px 16px;
    border-radius: 0;
    font-size: 14px;
  }
  .header-inner {
    flex-wrap: wrap;
  }
  .header-inner .logo {
    flex: 1;
  }
}