:root{
  --primary:#06b6d4;
  --primary-dark:#0891b2;
  --secondary:#0e7490;
  --accent:#22d3ee;
  --success:#10b981;
  --warning:#f59e0b;
  --danger:#ef4444;
  --bg:linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
  --bg-light:#f1f5f9;
  --text:#1a1a1a;
  --text-dark:#000000;
  --muted:#4a5568;
  --card:#ffffff;
  --surface:#ffffff;
  --panel:#e2e8f0;
  --border:#cbd5e1;
  --shadow:0 10px 30px rgba(6, 182, 212, 0.15);
  --shadow-strong:0 20px 40px rgba(6, 182, 212, 0.25);
  --shadow-hover:0 15px 35px rgba(6, 182, 212, 0.2);
  --radius:16px;
  --radius-lg:20px;
  --nav-height:70px;
  --container:1120px;
  --focus-ring:rgba(6, 182, 212, 0.4);
  --nav-bg:rgba(255,255,255,0.95);
  --nav-border:rgba(203, 213, 225, 0.8);
  --gradient-1:linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
  --gradient-2:linear-gradient(135deg, #ec4899 0%, #f43f5e 100%);
  --gradient-3:linear-gradient(135deg, #8b5cf6 0%, #6366f1 100%);
  --gradient-4:linear-gradient(135deg, #10b981 0%, #14b8a6 100%);
  --gradient-5:linear-gradient(135deg, #f59e0b 0%, #f97316 100%);
}

*{box-sizing:border-box;}

/* 加载动画 */
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
html,body{height:100%;}
body{
  margin:0;
  font-family:"Times New Roman", SimSun, serif;
  font-size:16px;
  line-height:1.7;
  color:var(--text);
  background:var(--bg-light);
  position:relative;
}

body::before{
  content:"";
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:400px;
  background:var(--gradient-1);
  z-index:-1;
  opacity:0.08;
}

a{color:inherit; text-decoration:none;}
img{max-width:100%; display:block;}

:focus-visible{
  outline:3px solid var(--focus-ring);
  outline-offset:2px;
}

@media (prefers-reduced-motion: reduce){
  *{
    transition:none !important;
    animation:none !important;
    scroll-behavior:auto !important;
  }
}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 18px;
}

.app{
  min-height:100%;
  padding-top:var(--nav-height);
  display:flex;
  flex-direction:column;
}

.top-nav{
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:var(--nav-height);
  z-index:50;
  background:var(--nav-bg);
  border-bottom:1px solid var(--nav-border);
  backdrop-filter:blur(12px);
  box-shadow:0 4px 20px rgba(102, 126, 234, 0.08);
}
.nav-inner{
  height:100%;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:16px;
}
.brand{
  display:none;
}
.brand-badge{
  display:none;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:6px;
  flex-wrap:wrap;
}

.nav-link{
  padding:12px 18px;
  border-radius:12px;
  color:#555555;
  font-weight:600;
  transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border:2px solid transparent;
  font-family:Arial, SimHei, sans-serif;
  position:relative;
  overflow:hidden;
}

.nav-link::before{
  content:"";
  position:absolute;
  top:0;
  left:-100%;
  width:100%;
  height:100%;
  background:var(--gradient-1);
  opacity:0.1;
  transition:left 0.3s ease;
  z-index:-1;
}

.nav-link:hover::before{
  left:0;
}

.nav-link:hover{
  color:#000000;
  border-color:rgba(6, 182, 212, 0.3);
  transform:translateY(-2px);
}

.nav-link.active{
  background:var(--gradient-1);
  color:#ffffff;
  border-color:transparent;
  box-shadow:0 4px 15px rgba(6, 182, 212, 0.3);
}

.hero{
  padding:60px 0 40px;
  position:relative;
  overflow:hidden;
}

.hero::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  bottom:0;
  background:var(--gradient-1);
  opacity:0.05;
  z-index:0;
}

.hero::after{
  content:"";
  position:absolute;
  top:-50%;
  left:-50%;
  width:200%;
  height:200%;
  background:radial-gradient(circle, rgba(6, 182, 212, 0.15) 0%, transparent 70%);
  animation:heroRotate 20s linear infinite;
  z-index:0;
}

@keyframes heroRotate{
  0%{
    transform:rotate(0deg);
  }
  100%{
    transform:rotate(360deg);
  }
}

.hero .container{
  position:relative;
  z-index:1;
}

.hero-card{
  background:transparent;
  border:none;
  box-shadow:none;
  padding:0;
  text-align:center;
  max-width:1000px;
  margin:0 auto;
}

.hero-title{
  margin:0;
  font-size:36px;
  line-height:1.3;
  font-weight:900;
  font-family:Arial, SimHei, sans-serif;
  color:#000000;
  position:relative;
  z-index:1;
  letter-spacing:2px;
  text-shadow:0 2px 20px rgba(0, 0, 0, 0.1);
}

.hero-subtitle{
  margin:20px 0 0;
  color:#555555;
  font-weight:600;
  line-height:1.8;
  font-size:18px;
  position:relative;
  z-index:1;
  letter-spacing:0.5px;
}
.hero-actions{
  margin-top:24px;
  display:flex;
  gap:14px;
  flex-wrap:wrap;
  position:relative;
  z-index:1;
}

.btn{
  border:0;
  cursor:pointer;
  padding:14px 28px;
  border-radius:12px;
  font-weight:700;
  letter-spacing:0.3px;
  transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  user-select:none;
  border:2px solid var(--border);
  background:#fff;
  color:var(--text);
  font-family:Arial, SimHei, sans-serif;
  position:relative;
  overflow:hidden;
}

.btn::before{
  content:"";
  position:absolute;
  top:50%;
  left:50%;
  width:0;
  height:0;
  border-radius:50%;
  background:rgba(255, 255, 255, 0.5);
  transform:translate(-50%, -50%);
  transition:width 0.6s, height 0.6s;
}

.btn:active::before{
  width:300px;
  height:300px;
}

.btn:active{
  transform:scale(0.95);
}

.btn-primary{
  color:#fff;
  background:var(--gradient-1);
  border-color:transparent;
  box-shadow:0 10px 30px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover{
  transform:translateY(-3px);
  box-shadow:0 15px 40px rgba(102, 126, 234, 0.4);
}
.btn-ghost{
  background:#fff;
  color:var(--text-dark);
  border-color:var(--border);
}

.btn-ghost:hover{
  background:var(--gradient-1);
  color:#fff;
  border-color:transparent;
  transform:translateY(-3px);
  box-shadow:0 10px 30px rgba(6, 182, 212, 0.25);
}
.btn-success{
  color:#fff;
  background:var(--success);
  border-color:var(--success);
  box-shadow:0 10px 22px rgba(15, 23, 42, 0.12);
}
.btn-success:hover{
  filter:brightness(0.98);
}

.section{
  padding:24px 0 40px;
}
.section-title{
  margin:0 0 24px;
  font-size:24px;
  font-weight:900;
  color:var(--text-dark);
  letter-spacing:0.3px;
  font-family:Arial, SimHei, sans-serif;
  position:relative;
  padding-left:20px;
}

.section-title::before{
  content:"";
  position:absolute;
  left:0;
  top:50%;
  transform:translateY(-50%);
  width:6px;
  height:28px;
  background:var(--gradient-1);
  border-radius:3px;
}

.grid{
  display:grid;
  grid-template-columns:repeat(12, 1fr);
  gap:16px;
}
.col-3{grid-column:span 3;}
.col-4{grid-column:span 4;}
.col-6{grid-column:span 6;}
.col-8{grid-column:span 8;}
.col-12{grid-column:span 12;}

.card{
  background:var(--card);
  border-radius:var(--radius);
  border:2px solid var(--border);
  box-shadow:var(--shadow);
  padding:32px 28px;
  position:relative;
  overflow:hidden;
  transition:all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.card::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  bottom:0;
  background:var(--gradient-1);
  opacity:0;
  transition:opacity 0.4s ease;
  z-index:0;
}

.card:hover::before{
  opacity:0.03;
}

.card:hover{
  transform:translateY(-8px) scale(1.02);
  box-shadow:var(--shadow-hover);
  border-color:rgba(102, 126, 234, 0.4);
}

.card-topline{
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:6px;
  background:var(--gradient-1);
  z-index:1;
}

.card-icon{
  width:64px;
  height:64px;
  border-radius:16px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:32px;
  margin:0 auto 16px;
  position:relative;
  z-index:1;
  transition:transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.card:hover .card-icon{
  transform:scale(1.1) rotate(5deg);
}
.card-title{
  margin:10px 0 12px;
  font-size:20px;
  font-weight:900;
  font-family:Arial, SimHei, sans-serif;
  color:var(--text-dark);
  position:relative;
  z-index:1;
  text-align:center;
}

.card-desc{
  margin:0;
  color:#333333;
  line-height:1.65;
  font-weight:600;
  position:relative;
  z-index:1;
  text-align:center;
}
.card-meta{
  margin-top:12px;
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}
.pill{
  padding:8px 16px;
  border-radius:999px;
  font-size:12px;
  font-weight:700;
  letter-spacing:0.3px;
  background:rgba(6, 182, 212, 0.08);
  color:#333333;
  border:2px solid rgba(6, 182, 212, 0.2);
  font-family:Arial, SimHei, sans-serif;
  transition:all 0.3s ease;
  position:relative;
  z-index:1;
}

.pill:hover{
  background:var(--gradient-1);
  color:#fff;
  border-color:transparent;
  transform:translateY(-2px);
  box-shadow:0 4px 12px rgba(6, 182, 212, 0.3);
}
.pill.success{
  background:rgba(31,78,121,0.10);
  border-color:rgba(31,78,121,0.34);
  color:var(--secondary);
  position:relative;
  padding-left:22px;
}
.pill[aria-pressed="true"]{
  background:rgba(31,78,121,0.10);
  border-color:rgba(31,78,121,0.34);
  color:var(--secondary);
  position:relative;
  padding-left:22px;
}
.pill[aria-pressed="true"]::before{
  content:"✓";
  position:absolute;
  left:9px;
  top:50%;
  transform:translateY(-50%);
  font-weight:900;
}
.pill.success::before{
  content:"✓";
  position:absolute;
  left:9px;
  top:50%;
  transform:translateY(-50%);
  font-weight:900;
}
.pill.warning{
  background:rgba(180,83,9,0.12);
  border-color:rgba(180,83,9,0.25);
  color:var(--warning);
}
.pill.danger{
  background:rgba(185,28,28,0.10);
  border-color:rgba(185,28,28,0.22);
  color:var(--danger);
}

.form{
  display:grid;
  grid-template-columns:repeat(12, 1fr);
  gap:12px;
}
.field{grid-column:span 4; display:flex; flex-direction:column; gap:6px;}
.field.full{grid-column:span 12;}
.label{
  font-weight:800;
  color:var(--text-dark);
  font-size:13px;
  font-family:Arial, SimHei, sans-serif;
}
.control{
  height:48px;
  border-radius:12px;
  border:2px solid var(--border);
  background:#fff;
  padding:0 16px;
  outline:none;
  font-weight:700;
  color:var(--text);
  transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-family:"Times New Roman", SimSun, serif;
}

.control:hover{
  border-color:rgba(102, 126, 234, 0.4);
}

.control:focus{
  border-color:var(--primary);
  box-shadow:0 0 0 4px rgba(102, 126, 234, 0.15);
  transform:translateY(-2px);
}
.help{
  margin:0;
  color:#555555;
  font-size:12px;
  line-height:1.5;
  font-weight:600;
}

.upload{
  border:3px dashed rgba(102, 126, 234, 0.3);
  background:#fff;
  border-radius:var(--radius-lg);
  padding:32px;
  min-height:280px;
  display:flex;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:14px;
  text-align:center;
  transition:all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position:relative;
  overflow:hidden;
}

.upload::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  bottom:0;
  background:var(--gradient-1);
  opacity:0;
  transition:opacity 0.4s ease;
}

.upload:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
  border-color:rgba(102, 126, 234, 0.5);
}

.upload:hover::before{
  opacity:0.03;
}

.upload.dragover{
  border-color:var(--primary);
  background:rgba(102, 126, 234, 0.05);
  box-shadow:0 0 0 6px rgba(102, 126, 234, 0.1);
  transform:scale(1.02);
}

.upload.dragover::before{
  opacity:0.08;
}
.upload-title{
  margin:0;
  font-size:18px;
  font-weight:900;
  color:var(--text-dark);
}

.upload-hint{
  margin:8px 0 16px;
  color:#333333;
  font-weight:600;
  line-height:1.5;
  font-size:15px;
}

.upload small{
  display:block;
  color:#555555;
  font-weight:600;
  margin-top:12px;
  font-size:13px;
}

.upload .btn{
  margin-top:8px;
  min-width:160px;
}

.stats{
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:12px;
}
.stat{
  background:#fff;
  border:2px solid var(--border);
  border-radius:16px;
  padding:18px 16px;
  transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position:relative;
  overflow:hidden;
}

.stat::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  width:4px;
  height:100%;
  background:var(--gradient-1);
  opacity:0;
  transition:opacity 0.3s ease;
}

.stat:hover{
  border-color:rgba(102, 126, 234, 0.3);
  transform:translateY(-3px);
  box-shadow:0 8px 20px rgba(102, 126, 234, 0.15);
}

.stat:hover::before{
  opacity:1;
}

.stat-k{
  margin:0;
  font-size:13px;
  color:#555555;
  font-weight:800;
  letter-spacing:0.3px;
}

.stat-v{
  margin:8px 0 0;
  font-size:24px;
  font-weight:950;
  background:var(--gradient-1);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}

.stat-v span{
  font-size:14px; 
  color:#555555; 
  font-weight:800;
  -webkit-text-fill-color:#555555;
}

.split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:20px;
  align-items:start;
}

/* 特定页面的分栏优化 - 所有页面统一使用左右分栏 */
/* 如需特定页面使用单列布局，可在此添加覆盖样式 */

.chart{
  width:100%;
  height:420px;
  border-radius:var(--radius-lg);
  border:2px solid var(--border);
  background:#fff;
  box-shadow:var(--shadow);
  transition:all 0.3s ease;
}

@media (max-width: 980px){
  .chart{
    height:360px;
  }
}

@media (max-width: 620px){
  .chart{
    height:300px;
  }
}

.chart:hover{
  box-shadow:var(--shadow-hover);
  border-color:rgba(102, 126, 234, 0.3);
}

.viewer{
  width:100%;
  height:420px;
  border-radius:var(--radius-lg);
  border:1px solid var(--border);
  background:#fff;
  box-shadow:var(--shadow);
  overflow:hidden;
}

.footer{
  margin-top:auto;
  padding:24px 0 32px;
  color:#555555;
  font-weight:700;
  position:relative;
}

.footer::before{
  content:"";
  position:absolute;
  top:0;
  left:50%;
  transform:translateX(-50%);
  width:200px;
  height:3px;
  background:var(--gradient-1);
  border-radius:3px;
  opacity:0.3;
}

.footer-inner{
  padding-top:20px;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:12px;
  flex-wrap:wrap;
  text-align:center;
}

.modal{
  position:fixed;
  inset:0;
  z-index:80;
  display:none;
}
.modal.open{display:block;}
.modal-backdrop{
  position:absolute;
  inset:0;
  background:rgba(30, 41, 59, 0.6);
  backdrop-filter:blur(8px);
  animation:backdropFadeIn 0.3s ease;
}

@keyframes backdropFadeIn{
  from{
    opacity:0;
  }
  to{
    opacity:1;
  }
}
.modal-panel{
  position:relative;
  width:min(800px, calc(100% - 32px));
  margin:calc(var(--nav-height) + 32px) auto 32px;
  background:var(--card);
  border-radius:var(--radius-lg);
  border:2px solid var(--border);
  box-shadow:0 25px 50px rgba(102, 126, 234, 0.25);
  overflow:hidden;
  animation:modalSlideIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes modalSlideIn{
  from{
    opacity:0;
    transform:translateY(-30px) scale(0.95);
  }
  to{
    opacity:1;
    transform:translateY(0) scale(1);
  }
}

.modal-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:20px 24px;
  border-bottom:2px solid var(--border);
  background:var(--gradient-1);
}

.modal-title{
  margin:0;
  font-weight:950;
  color:#ffffff;
  font-family:Arial, SimHei, sans-serif;
  font-size:20px;
}

.modal-body{
  padding:24px;
  max-height:calc(100vh - var(--nav-height) - 200px);
  overflow-y:auto;
}
.icon-btn{
  width:42px;
  height:42px;
  border-radius:12px;
  border:2px solid var(--border);
  background:#fff;
  cursor:pointer;
  font-weight:900;
  color:#000000;
  transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position:relative;
  overflow:hidden;
}

.icon-btn::before{
  content:"";
  position:absolute;
  top:50%;
  left:50%;
  width:0;
  height:0;
  border-radius:50%;
  background:var(--gradient-1);
  transform:translate(-50%, -50%);
  transition:width 0.4s, height 0.4s;
  opacity:0.1;
}

.icon-btn:hover::before{
  width:100px;
  height:100px;
}

.icon-btn:hover{
  border-color:var(--primary);
  transform:rotate(90deg);
  box-shadow:0 4px 15px rgba(102, 126, 234, 0.2);
}

.icon-btn:active{
  transform:rotate(90deg) scale(0.9);
}

.table{
  width:100%;
  border-collapse:separate;
  border-spacing:0;
  overflow:hidden;
  border-radius:16px;
  border:2px solid var(--border);
  box-shadow:0 4px 15px rgba(6, 182, 212, 0.08);
  table-layout:fixed;
}

.table th, .table td{
  padding:16px 14px;
  border-bottom:1px solid var(--border);
  text-align:left;
  font-weight:700;
  font-size:14px;
  transition:background 0.2s ease;
  word-wrap:break-word;
  word-break:break-word;
  overflow-wrap:break-word;
  line-height:1.6;
}

.table th{
  background:var(--gradient-1);
  color:#ffffff;
  font-weight:900;
  font-family:Arial, SimHei, sans-serif;
  letter-spacing:0.3px;
}

.table tbody tr{
  transition:all 0.2s ease;
}

.table tbody tr:hover{
  background:rgba(6, 182, 212, 0.04);
}

.table tr:last-child td{
  border-bottom:0;
}

/* 报告页面表格列宽 */
body[data-page="report"] .table th:nth-child(1), 
body[data-page="report"] .table td:nth-child(1) {
  width: 35%;
}

body[data-page="report"] .table th:nth-child(2), 
body[data-page="report"] .table td:nth-child(2) {
  width: 25%;
}

body[data-page="report"] .table th:nth-child(3), 
body[data-page="report"] .table td:nth-child(3) {
  width: 25%;
}

body[data-page="report"] .table th:nth-child(4), 
body[data-page="report"] .table td:nth-child(4) {
  width: 15%;
  text-align: center;
}

.citation-block{
  border:1px solid var(--border);
  border-left:4px solid var(--primary);
  background:rgba(31,78,121,0.04);
  border-radius:14px;
  padding:12px 14px;
}
.citation-block .citation-title{
  margin:0 0 8px;
  font-weight:900;
  color:var(--secondary);
  font-family:Arial, SimHei, sans-serif;
  font-size:13px;
}
.citation-block pre{
  margin:0;
  white-space:pre-wrap;
  word-break:break-word;
  font-family:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size:12px;
  line-height:1.5;
  color:var(--text);
}
.equation-box{
  border:1px solid var(--border);
  border-radius:14px;
  background:#fff;
  padding:12px 14px;
}
.equation-box .equation-title{
  margin:0 0 10px;
  font-weight:900;
  color:var(--secondary);
  font-family:Arial, SimHei, sans-serif;
  font-size:13px;
}
.equation-box .equation-body{
  text-align:center;
  overflow:auto;
}

.result-list{
  margin-top:10px;
  border:1px solid var(--border);
  border-radius:14px;
  background:var(--panel);
  max-height:280px;
  overflow:auto;
  padding:8px;
}
.result-item{
  display:flex;
  align-items:center;
  gap:12px;
  padding:14px 12px;
  border-radius:14px;
  border:2px solid transparent;
  cursor:pointer;
  transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position:relative;
}

.result-item::before{
  content:"";
  position:absolute;
  left:0;
  top:0;
  bottom:0;
  width:4px;
  background:var(--gradient-1);
  opacity:0;
  transition:opacity 0.3s ease;
  border-radius:14px 0 0 14px;
}

.result-item:hover{
  background:rgba(102, 126, 234, 0.05);
  border-color:rgba(102, 126, 234, 0.2);
  transform:translateX(4px);
}

.result-item:hover::before{
  opacity:0.6;
}

.result-item.active{
  background:rgba(102, 126, 234, 0.1);
  border-color:rgba(102, 126, 234, 0.3);
  box-shadow:0 4px 15px rgba(102, 126, 234, 0.15);
}

.result-item.active::before{
  opacity:1;
}
.result-meta{
  display:flex;
  flex-direction:column;
  gap:2px;
  min-width:0;
}
.result-title{
  font-weight:950;
  color:var(--text-dark);
  font-family:Arial, SimHei, sans-serif;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.result-sub{
  font-weight:800;
  color:#555555;
  font-size:12px;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.svg-thumb{
  width:60px;
  height:48px;
  border-radius:12px;
  border:2px solid var(--border);
  background:#fff;
  display:flex;
  align-items:center;
  justify-content:center;
  overflow:hidden;
  flex:0 0 auto;
  transition:all 0.3s ease;
}

.result-item:hover .svg-thumb{
  border-color:rgba(102, 126, 234, 0.4);
  transform:scale(1.05);
  box-shadow:0 4px 12px rgba(102, 126, 234, 0.15);
}
.svg-box{
  width:100%;
  min-height:240px;
  border-radius:var(--radius-lg);
  border:1px solid var(--border);
  background:#fff;
  box-shadow:var(--shadow);
  display:flex;
  align-items:center;
  justify-content:center;
  overflow:hidden;
  padding:16px;
}
.svg-box svg{
  width:100%; 
  height:auto; 
  max-width:100%;
  max-height:320px;
  object-fit:contain;
}
.num-pos{
  color:var(--success); 
  font-weight:900;
  background:var(--gradient-4);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}

.num-neg{
  color:var(--danger); 
  font-weight:900;
  background:var(--gradient-2);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}

.num-zero{
  color:#555555; 
  font-weight:900;
}

@media print{
  body{background:#fff;}
  .top-nav{position:static; height:auto; border-bottom:0;}
  .nav-links{display:none;}
  .hero{padding:18px 0 10px;}
  .btn{display:none !important;}
  .card{box-shadow:none;}
}
.gas-head{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:10px;
  flex-wrap:wrap;
}

.alert{
  border-radius:16px;
  border:2px solid var(--border);
  padding:16px 18px;
  font-weight:800;
  position:relative;
  overflow:hidden;
  transition:all 0.3s ease;
}

.alert::before{
  content:"";
  position:absolute;
  left:0;
  top:0;
  bottom:0;
  width:5px;
  background:currentColor;
}

.alert.success{
  background:rgba(16, 185, 129, 0.08);
  border-color:rgba(16, 185, 129, 0.3);
  color:var(--success);
}

.alert.success::before{
  background:var(--gradient-4);
}

.alert.danger{
  background:rgba(239, 68, 68, 0.08);
  border-color:rgba(239, 68, 68, 0.3);
  color:var(--danger);
}

.alert.danger::before{
  background:var(--gradient-2);
}

.alert.warning{
  background:rgba(245, 158, 11, 0.08);
  border-color:rgba(245, 158, 11, 0.3);
  color:var(--warning);
}

.alert.warning::before{
  background:var(--gradient-5);
}

/* 中等屏幕优化 (≤980px) */
@media (max-width: 980px){
  .split{grid-template-columns:1fr;}
  .col-3{grid-column:span 6;}
  .col-4{grid-column:span 6;}
  .col-6{grid-column:span 12;}
  .field{grid-column:span 6;}
  
  .stats{
    grid-template-columns:repeat(2, 1fr);
  }
  
  .structure-params-grid {
    grid-template-columns:repeat(2, 1fr);
  }
  
  .card-icon{
    width:56px;
    height:56px;
    font-size:28px;
  }
  
  .section-title{
    font-size:20px;
  }
  
  .card{
    padding:24px 20px;
  }
}

@media (max-width: 620px){
  :root{--nav-height:72px;}
  .hero{padding:40px 0 30px;}
  .hero-title{font-size:24px; letter-spacing:1px;}
  .hero-subtitle{font-size:15px; margin:16px 0 0;}
  .nav-inner{align-items:flex-start; padding-top:12px; padding-bottom:12px;}
  .nav-links{gap:6px;}
  .nav-link{padding:10px 14px; font-size:14px;}
  .col-3,.col-4{grid-column:span 12;}
  .field{grid-column:span 12;}
  .viewer{height:360px;}
  .chart{height:300px;}
  
  .card{
    padding:20px 16px;
  }
  
  .card-icon{
    width:52px;
    height:52px;
    font-size:26px;
  }
  
  .btn{
    padding:12px 20px;
    font-size:14px;
  }
  
  .section-title{
    font-size:18px;
    padding-left:16px;
  }
  
  .section-title::before{
    width:5px;
    height:24px;
  }
  
  .stats{
    grid-template-columns:1fr;
    gap:10px;
  }
  
  .structure-params-grid {
    grid-template-columns:1fr;
    gap:12px;
  }
  
  .table{
    font-size:13px;
  }
  
  .table th, .table td{
    padding:10px 8px;
    font-size:13px;
  }
}

/* 页面加载动画 */
@keyframes fadeInUp{
  from{
    opacity:0;
    transform:translateY(30px);
  }
  to{
    opacity:1;
    transform:translateY(0);
  }
}

.card{
  animation:fadeInUp 0.6s ease-out backwards;
}

.card:nth-child(1){animation-delay:0.1s;}
.card:nth-child(2){animation-delay:0.2s;}
.card:nth-child(3){animation-delay:0.3s;}
.card:nth-child(4){animation-delay:0.4s;}

/* 脉冲动画 */
@keyframes pulse{
  0%, 100%{
    opacity:1;
  }
  50%{
    opacity:0.7;
  }
}

/* 渐变动画 */
@keyframes gradientShift{
  0%{
    background-position:0% 50%;
  }
  50%{
    background-position:100% 50%;
  }
  100%{
    background-position:0% 50%;
  }
}

/* 按钮成功状态 */
.pill.success{
  animation:successPulse 0.6s ease;
}

@keyframes successPulse{
  0%{
    transform:scale(1);
  }
  50%{
    transform:scale(1.05);
  }
  100%{
    transform:scale(1);
  }
}

/* 卡片悬停光效 */
.card::after{
  content:"";
  position:absolute;
  top:-50%;
  left:-50%;
  width:200%;
  height:200%;
  background:radial-gradient(circle, rgba(255, 255, 255, 0.8) 0%, transparent 70%);
  opacity:0;
  transition:opacity 0.6s ease;
  pointer-events:none;
}

.card:hover::after{
  opacity:0.1;
  animation:shimmer 2s ease-in-out infinite;
}

@keyframes shimmer{
  0%{
    transform:translate(-50%, -50%) rotate(0deg);
  }
  100%{
    transform:translate(-50%, -50%) rotate(360deg);
  }
}

/* 输入框聚焦动画 */
.control{
  position:relative;
}

/* 加载状态 */
.loading{
  position:relative;
  pointer-events:none;
  opacity:0.6;
}

.loading::after{
  content:"";
  position:absolute;
  top:50%;
  left:50%;
  width:20px;
  height:20px;
  margin:-10px 0 0 -10px;
  border:3px solid rgba(102, 126, 234, 0.3);
  border-top-color:var(--primary);
  border-radius:50%;
  animation:spin 0.8s linear infinite;
}

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

/* 平滑滚动 */
html{
  scroll-behavior:smooth;
}

/* 选中文本样式 */
::selection{
  background:rgba(102, 126, 234, 0.2);
  color:var(--text);
}

::-moz-selection{
  background:rgba(102, 126, 234, 0.2);
  color:var(--text);
}

/* 滚动条样式 */
::-webkit-scrollbar{
  width:10px;
  height:10px;
}

::-webkit-scrollbar-track{
  background:var(--panel);
  border-radius:5px;
}

::-webkit-scrollbar-thumb{
  background:var(--gradient-1);
  border-radius:5px;
  transition:background 0.3s ease;
}

::-webkit-scrollbar-thumb:hover{
  background:var(--primary-dark);
}

/* 工具提示样式 */
[data-tooltip]{
  position:relative;
  cursor:help;
}

[data-tooltip]::before{
  content:attr(data-tooltip);
  position:absolute;
  bottom:100%;
  left:50%;
  transform:translateX(-50%) translateY(-8px);
  padding:8px 12px;
  background:var(--text);
  color:#fff;
  font-size:12px;
  font-weight:600;
  border-radius:8px;
  white-space:nowrap;
  opacity:0;
  pointer-events:none;
  transition:opacity 0.3s ease, transform 0.3s ease;
  z-index:100;
}

[data-tooltip]:hover::before{
  opacity:1;
  transform:translateX(-50%) translateY(-4px);
}

/* 徽章动画 */
.brand-badge{
  position:relative;
  overflow:hidden;
}

.brand-badge::before{
  content:"";
  position:absolute;
  top:-50%;
  left:-50%;
  width:200%;
  height:200%;
  background:linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  animation:badgeShine 3s ease-in-out infinite;
}

@keyframes badgeShine{
  0%{
    transform:translateX(-100%) translateY(-100%) rotate(45deg);
  }
  100%{
    transform:translateX(100%) translateY(100%) rotate(45deg);
  }
}

/* 表单验证状态 */
.control.error{
  border-color:var(--danger);
  animation:shake 0.4s ease;
}

@keyframes shake{
  0%, 100%{
    transform:translateX(0);
  }
  25%{
    transform:translateX(-8px);
  }
  75%{
    transform:translateX(8px);
  }
}

.control.success{
  border-color:var(--success);
}

/* 骨架屏加载 */
.skeleton{
  background:linear-gradient(90deg, var(--panel) 25%, var(--border) 50%, var(--panel) 75%);
  background-size:200% 100%;
  animation:skeletonLoading 1.5s ease-in-out infinite;
  border-radius:8px;
}

@keyframes skeletonLoading{
  0%{
    background-position:200% 0;
  }
  100%{
    background-position:-200% 0;
  }
}

/* 隐藏报告页面的方法与引用部分 */
body[data-page="report"] .equation-box,
body[data-page="report"] .citation-block {
  display: none !important;
}

/* 按钮组优化 */
.btn-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  margin-top: 20px;
}

.btn-group .btn {
  flex: 0 1 auto;
  min-width: 140px;
}

/* 主要操作按钮 */
.btn-group .btn-primary {
  order: 1;
}

/* 次要操作按钮 */
.btn-group .btn-ghost,
.btn-group .btn-success {
  order: 2;
}

/* 表单按钮组 */
.form .btn-group {
  grid-column: span 12;
  margin-top: 8px;
  padding-top: 12px;
  border-top: 2px solid var(--border);
}

/* Hero区域按钮组 */
.hero-actions {
  margin-top: 28px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
  align-items: center;
}

.hero-actions .btn {
  min-width: 180px;
  padding: 16px 32px;
  font-size: 16px;
}

/* 卡片内按钮组 */
.card .btn-group {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 2px solid var(--border);
}

/* 响应式优化 */
@media (max-width: 620px) {
  .btn-group {
    flex-direction: column;
    width: 100%;
  }
  
  .btn-group .btn {
    width: 100%;
    min-width: auto;
  }
  
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-actions .btn {
    width: 100%;
    min-width: auto;
  }
}

/* 气体分子页面优化 */
body[data-page="gas-db"] .card h4 {
  margin: 0 0 10px;
  font-size: 14px;
  font-weight: 900;
  color: var(--text-dark);
  font-family: Arial, SimHei, sans-serif;
}

/* 结构参数网格布局 */
.structure-params-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.param-section {
  background: #ffffff;
  border-radius: 12px;
  padding: 16px;
  border: 1px solid rgba(6, 182, 212, 0.15);
  transition: all 0.3s ease;
}

.param-section:hover {
  border-color: rgba(6, 182, 212, 0.3);
  box-shadow: 0 4px 12px rgba(6, 182, 212, 0.1);
  transform: translateY(-2px);
}

.param-section-title {
  margin: 0 0 12px;
  font-size: 14px;
  font-weight: 900;
  color: var(--text-dark);
  font-family: Arial, SimHei, sans-serif;
  padding-bottom: 8px;
  border-bottom: 2px solid rgba(6, 182, 212, 0.2);
}

/* 紧凑表格样式 */
.compact-table {
  border: none;
  box-shadow: none;
  border-radius: 0;
  font-size: 13px;
}

.compact-table th,
.compact-table td {
  padding: 8px 10px;
  font-size: 13px;
}

.compact-table thead tr th {
  background: rgba(6, 182, 212, 0.08);
  color: var(--text-dark);
  font-size: 12px;
}

.compact-table tbody tr:hover {
  background: rgba(6, 182, 212, 0.05);
}

/* 物理参数框样式 */
body[data-page="gas-db"] .stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

body[data-page="gas-db"] .stat {
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.05) 0%, rgba(59, 130, 246, 0.05) 100%);
  border: 2px solid rgba(6, 182, 212, 0.2);
  position: relative;
  overflow: hidden;
}

body[data-page="gas-db"] .stat::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--gradient-1);
}

body[data-page="gas-db"] .stat:hover {
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.08) 0%, rgba(59, 130, 246, 0.08) 100%);
  border-color: rgba(6, 182, 212, 0.35);
}

/* 响应式：移动端堆叠显示 */
@media (max-width: 980px) {
  body[data-page="gas-db"] .col-4 {
    grid-column: span 12;
  }
  
  .structure-params-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  body[data-page="gas-db"] .stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 620px) {
  .structure-params-grid {
    grid-template-columns: 1fr;
  }
  
  body[data-page="gas-db"] .stats {
    grid-template-columns: 1fr;
  }
}

/* Report 页面优化 - 减小 stat 框高度 */
body[data-page="report"] .stat {
  padding: 12px 14px;
}

body[data-page="report"] .stat-k {
  font-size: 12px;
}

body[data-page="report"] .stat-v {
  margin: 6px 0 0;
  font-size: 20px;
}

body[data-page="report"] .stat-v span {
  font-size: 13px;
}

/* Compact table 样式 - 用于紧凑显示 */
.compact-table {
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(6, 182, 212, 0.06);
}

.compact-table th,
.compact-table td {
  padding: 8px 10px;
  font-size: 13px;
}

.compact-table th {
  font-weight: 800;
  font-size: 12px;
}

.compact-table tbody tr:hover {
  background: rgba(6, 182, 212, 0.03);
}

/* 结构页面可视化区域样式 */
body[data-page="structure"] #viewer3d {
  height: 450px;
}

@media (max-width: 980px){
  body[data-page="structure"] #viewer3d {
    height: 380px;
  }
}

@media (max-width: 620px){
  body[data-page="structure"] #viewer3d {
    height: 320px;
  }
}

/* 文件输入样式优化 */
input[type="file"].control {
  padding: 12px 16px;
  height: auto;
  cursor: pointer;
  font-size: 14px;
}

input[type="file"].control::-webkit-file-upload-button {
  padding: 8px 16px;
  border: 2px solid var(--border);
  border-radius: 8px;
  background: var(--gradient-1);
  color: #fff;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s ease;
  margin-right: 12px;
  font-family: Arial, SimHei, sans-serif;
}

input[type="file"].control::-webkit-file-upload-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(6, 182, 212, 0.3);
}

input[type="file"].control::file-selector-button {
  padding: 8px 16px;
  border: 2px solid var(--border);
  border-radius: 8px;
  background: var(--gradient-1);
  color: #fff;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s ease;
  margin-right: 12px;
  font-family: Arial, SimHei, sans-serif;
}

input[type="file"].control::file-selector-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(6, 182, 212, 0.3);
}

/* 3D查看器容器 */
#viewer3d {
  position: relative;
  overflow: hidden;
}

#viewer3d canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}