/* ===============================
   AI Detect – Base
   =============================== */
.ai-det-section{
  position:relative;
  padding:80px 0 90px;
  background:#f4f6ff;
  overflow:hidden;
}

.ai-det-section::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    radial-gradient(circle at 0 0,rgba(148,163,184,.25) 0,transparent 55%),
    radial-gradient(circle at 100% 100%,rgba(129,140,248,.2) 0,transparent 55%);
  opacity:.45;
  pointer-events:none;
}

.ai-det-shell{
  position:relative;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
  z-index:1;
  font-family:"Inter","Noto Sans TC",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color:#111827;
}

/* Head */
.ai-det-head{
  text-align:center;
  margin-bottom:26px;
}

.ai-det-eyebrow{
  font-size:.72rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:#9ca3af;
}

.ai-det-title{
  font-size:1.9rem;
  letter-spacing:.08em;
  margin-top:6px;
  font-weight:800;
  color:#111827;
}

.ai-det-subtitle{
  margin-top:10px;
  font-size:.9rem;
  max-width:720px;
  margin-left:auto;
  margin-right:auto;
  color:#4b5563;
}

/* Focus Bar */
.ai-det-focus-bar{
  margin:24px auto 30px;
  max-width:920px;
  display:flex;
  align-items:center;
  gap:14px;
  padding:10px 14px;
  border-radius:999px;
  background:rgba(255,255,255,.88);
  box-shadow:
    0 18px 45px rgba(15,23,42,.16),
    0 0 0 1px rgba(148,163,184,.22);
  backdrop-filter:blur(22px);
}

.ai-det-focus-label{
  font-size:.7rem;
  text-transform:uppercase;
  letter-spacing:.16em;
  padding:4px 12px;
  border-radius:999px;
  background:linear-gradient(135deg,#4f46e5,#22c55e);
  color:#e5e7eb;
  font-weight:600;
}

.ai-det-focus-main{
  display:flex;
  flex-direction:column;
  gap:3px;
}

.ai-det-focus-title{
  font-size:.9rem;
  font-weight:700;
  color:#111827;
}

.ai-det-focus-desc{
  font-size:.8rem;
  color:#6b7280;
}

/* Layout */
.ai-det-layout{
  display:grid;
  grid-template-columns: minmax(0,280px) minmax(0,1fr);
  gap:20px;
  align-items:stretch;
}

/* 左側 Nav */
.ai-det-nav{
  display:flex;
  flex-direction:column;
  gap:10px;
}

.ai-det-nav-btn{
  width:100%;
  display:flex;
  align-items:center;
  gap:14px;
  padding:10px 14px;
  border-radius:18px;
  border:1px solid rgba(148,163,184,.35);
  background:rgba(255,255,255,.85);
  backdrop-filter:blur(18px);
  cursor:pointer;
  text-align:left;
  transition:
    transform .2s ease-out,
    box-shadow .2s ease-out,
    border-color .2s ease-out,
    background .2s ease-out;
}

.ai-det-nav-btn:hover{
  transform:translateY(-2px);
  box-shadow:0 14px 35px rgba(15,23,42,.14);
}

.ai-det-nav-btn.is-active{
  border-color:rgba(79,70,229,.9);
  background:linear-gradient(135deg,rgba(79,70,229,.12),rgba(59,130,246,.08));
  box-shadow:0 16px 40px rgba(79,70,229,.25);
}

.ai-det-nav-ico{
  width:32px;
  height:32px;
  border-radius:999px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:radial-gradient(circle at 30% 10%,#e0f2fe,#dbeafe);
  color:#1d4ed8;
  flex-shrink:0;
}

.ai-det-nav-ico i{
  font-size:.9rem;
}

.ai-det-nav-text{
  display:flex;
  flex-direction:column;
  gap:2px;
}

.ai-det-nav-main{
  font-size:.86rem;
  font-weight:700;
  color:#111827;
}

.ai-det-nav-sub{
  font-size:.75rem;
  color:#6b7280;
}

/* 右側 Hero Card */
.ai-det-hero-card{
  border-radius:26px;
  background:rgba(255,255,255,.9);
  backdrop-filter:blur(22px);
  box-shadow:
    0 24px 60px rgba(15,23,42,.18),
    0 0 0 1px rgba(148,163,184,.28);
  padding:20px 20px 22px;
  overflow:hidden;
  position:relative;
}

.ai-det-hero-inner{
  display:grid;
  grid-template-columns: minmax(0,1.5fr) minmax(0,1.1fr);
  gap:18px;
  align-items:stretch;
}

/* copy */
.ai-det-hero-copy{
  position:relative;
  z-index:2;
  display:flex;
  flex-direction:column;
  gap:10px;
}

.ai-det-hero-eyebrow{
  font-size:.72rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:#9ca3af;
}

.ai-det-hero-title{
  font-size:1.35rem;
  font-weight:800;
  color:#111827;
}

.ai-det-hero-desc{
  font-size:.86rem;
  color:#4b5563;
  line-height:1.7;
}

.ai-det-hero-list{
  margin:4px 0 0;
  padding-left:1.1rem;
  display:flex;
  flex-direction:column;
  gap:4px;
  font-size:.8rem;
  color:#374151;
}

.ai-det-hero-list li::marker{
  color:#6366f1;
}

/* Pills */
.ai-det-pills{
  margin-top:10px;
  display:grid;
  grid-template-columns: repeat(2,minmax(0,1fr));
  gap:10px;
}

.ai-det-pill-btn{
  border-radius:16px;
  border:1px solid rgba(148,163,184,.4);
  background:rgba(248,250,252,.95);
  padding:9px 10px 10px;
  text-align:left;
  cursor:pointer;
  transition:
    background .22s ease-out,
    border-color .22s ease-out,
    box-shadow .22s ease-out,
    transform .22s ease-out,
    color .22s ease-out;
}

.ai-det-pill-btn:hover{
  transform:translateY(-1px);
  box-shadow:0 14px 32px rgba(15,23,42,.18);
}

.ai-det-pill-btn.is-selected{
  background:linear-gradient(135deg,#4f46e5,#2563eb);
  border-color:transparent;
  box-shadow:0 16px 40px rgba(79,70,229,.4);
  color:#e5e7eb;
}

.ai-det-pill-main{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:.78rem;
  font-weight:700;
}

.ai-det-pill-ico{
  font-size:.8rem;
}

.ai-det-pill-btn.is-selected .ai-det-pill-ico{
  color:#facc15;
}

.ai-det-pill-sub{
  margin-top:4px;
  font-size:.7rem;
  line-height:1.5;
  color:#6b7280;
}

.ai-det-pill-btn.is-selected .ai-det-pill-sub{
  color:#e5e7eb;
}

/* Hero visual */
.ai-det-hero-visual{
  position:relative;
  border-radius:20px;
  overflow:hidden;
  background:radial-gradient(circle at 10% 0,#dbeafe,transparent 60%),
             radial-gradient(circle at 90% 100%,#fef3c7,transparent 55%);
}

.ai-det-visual-layer{
  position:absolute;
  inset:0;
}

/* 背景格線 */
.ai-det-visual-grid{
  background-image:
    linear-gradient(to right,rgba(148,163,184,.3) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(148,163,184,.24) 1px,transparent 1px);
  background-size:22px 22px;
  opacity:.55;
}

/* 情境圖： background-image:url(...) */
.ai-det-visual-photo{
  background-size:cover;
  background-position:center;
  filter:saturate(1.05) contrast(1.02);
  opacity:.92;
  transform:scale(1.03);
  animation:aiDetVisualPan 22s ease-in-out infinite alternate;
}

/* 情境圖 */

.ai-det-hero-card[data-mode="person"] 
.ai-det-visual-photo{
  background-image:
    radial-gradient(circle at 50% 10%,rgba(56,189,248,.5),transparent 95%),
    url("../img/banner/ai_person2.png");
}

.ai-det-hero-card[data-mode="vehicle"] .ai-det-visual-photo{
  background-image:
    radial-gradient(circle at 50% 85%,rgba(59,130,246,.5),transparent 55%),
    url("../img/banner/ai_vehicle.png");
}

.ai-det-hero-card[data-mode="environment"] .ai-det-visual-photo{
  background-image:
    radial-gradient(circle at 50% 30%,rgba(52,211,153,.45),transparent 50%),
    url("../img/banner/ai_environment.png");
}

.ai-det-hero-card[data-mode="behavior"] .ai-det-visual-photo{
  background-image:
    radial-gradient(circle at 60% 40%,rgba(234,179,8,.55),transparent 50%),
    url("../img/banner/ai_behavior.png");
}

.ai-det-hero-card[data-mode="edge"] .ai-det-visual-photo{
  background-image:
    radial-gradient(circle at 40% 45%,rgba(129,140,248,.6),transparent 45%),
    url("../img/banner/ai_edge.png");
}

/* 前景 HUD 光暈 */
.ai-det-visual-overlay{
  background:
    radial-gradient(circle at 50% 80%,rgba(15,23,42,.85),transparent 75%),
    radial-gradient(circle at 40% 30%,rgba(248,250,252,.04),transparent 60%);
  mix-blend-mode:multiply;
  opacity:.96;
}

/* LIVE badge */
.ai-det-visual-badge{
  position:absolute;
  left:14px;
  top:12px;
  padding:5px 10px;
  border-radius:999px;
  background:rgba(15,23,42,.86);
  display:flex;
  align-items:center;
  gap:6px;
  font-size:.7rem;
  color:#e5e7eb;
  box-shadow:0 10px 30px rgba(15,23,42,.45);
}

.ai-det-badge-dot{
  width:7px;
  height:7px;
  border-radius:999px;
  background:#f97316;
  box-shadow:0 0 0 6px rgba(248,173,108,.4);
}

/* Foot tags */
.ai-det-foot{
  margin-top:20px;
}

.ai-det-foot-label{
  font-size:.72rem;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:#9ca3af;
  margin-bottom:6px;
}

.ai-det-foot-tags{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}

.ai-det-foot-tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 11px;
  border-radius:999px;
  background:rgba(255,255,255,.88);
  border:1px solid rgba(209,213,219,.8);
  font-size:.72rem;
  color:#4b5563;
  backdrop-filter:blur(16px);
  cursor:pointer;                         /* ← 新增：變成可點選 */
  transition:
    background .18s ease-out,
    border-color .18s ease-out,
    box-shadow .18s ease-out,
    color .18s ease-out,
    transform .18s ease-out;
}

.ai-det-foot-tag:hover{
  transform:translateY(-1px);
  box-shadow:0 10px 26px rgba(15,23,42,.18);
  border-color:rgba(129,140,248,.75);
}

/* 選取狀態 */
.ai-det-foot-tag.is-selected{
  background:linear-gradient(135deg,#4f46e5,#6366f1);
  border-color:transparent;
  color:#eef2ff;
  box-shadow:0 12px 32px rgba(79,70,229,.45);
}

.ai-det-foot-tag.is-selected i{
  color:#fde047; /* icon 變黃，像小亮燈 */
}

.ai-det-foot-tag i{
  font-size:.7rem;
  color:#4f46e5;
}

/* 動畫 */
@keyframes aiDetVisualPan{
  0%{
    transform:scale(1.03) translate3d(-6px,0,0);
  }
  50%{
    transform:scale(1.06) translate3d(4px,-6px,0);
  }
  100%{
    transform:scale(1.05) translate3d(8px,-2px,0);
  }
}

/* RWD */
@media (max-width:960px){
  .ai-det-layout{
    grid-template-columns: minmax(0,1fr);
  }
  .ai-det-nav{
    flex-direction:row;
    overflow-x:auto;
    padding-bottom:6px;
  }
  .ai-det-nav-btn{
    min-width:210px;
  }
}

@media (max-width:780px){
  .ai-det-hero-inner{
    grid-template-columns:minmax(0,1fr);
  }
  .ai-det-hero-visual{
    order:-1;
    height:220px;
  }
}

@media (max-width:540px){
  .ai-det-focus-bar{
    flex-direction:column;
    align-items:flex-start;
    border-radius:24px;
  }
}


/* ===============================
   北捷 Metro AI Warning
================================ */

.ios-glass-metro-aiwarn{
  padding:96px 0;
  background:linear-gradient(180deg,#ffffff,#f4f7ff);
}

.metro-aiwarn-wrap{
  max-width:1280px;
  margin:auto;
  padding:0 40px;
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:72px;
  align-items:center;
}

/* LEFT */
.metro-aiwarn-title{
  font-size:42px;
  line-height:1.15;
  margin-bottom:16px;
}

.metro-aiwarn-title span{
  color:#4f6cff;
}

.metro-aiwarn-desc{
  max-width:520px;
  font-size:15px;
  line-height:1.8;
  color:#4b5563;
  margin-bottom:36px;
}

.metro-aiwarn-cards{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:20px;
}

.metro-aiwarn-card{
  padding:22px;
  border-radius:24px;
  text-align:left;
  cursor:pointer;

  background:rgba(255,255,255,.75);
  backdrop-filter:blur(18px);
  border:1px solid rgba(120,140,210,.25);

  box-shadow:0 14px 32px rgba(80,100,200,.15);
  transition:.35s ease;
}

.metro-aiwarn-card i{
  font-size:18px;
  color:#4f6cff;
}

.metro-aiwarn-card h4{
  margin:10px 0 6px;
  font-size:15px;
}

.metro-aiwarn-card p{
  font-size:13px;
  color:#6b7280;
  line-height:1.6;
}

.metro-aiwarn-card.active,
.metro-aiwarn-card:hover{
  background:linear-gradient(135deg,#eef2ff,#ffffff);
  box-shadow:0 22px 48px rgba(99,102,241,.35);
  transform:translateY(-2px);
}

/* RIGHT 容器 */
.metro-aiwarn-visual{
  position: relative;
  width: 100%;
}

/* RIGHT */
.metro-aiwarn-glass{
  position: relative;
  width: 100%;
  height: 440px;
  border-radius: 32px;
  overflow: hidden;
  background:#050814;
  box-shadow:0 30px 80px rgba(40,60,140,.25);
}

/* 背景捷運照片 */
.metro-aiwarn-bg{
  position: absolute;
  inset: 0;
  z-index: 1;
  background-image:url("../img/banner/metro-aiwarn-demo.png");
  background-size:cover;
  background-position:center;

  opacity:1;
  visibility:visible;
}

/* Canvas 視覺層 */
#metroAiwarnCanvas{
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display:block;
  z-index: 2;
  pointer-events: none;
}

.metro-aiwarn-img{
  width:100%;
  height:100%;
  object-fit:cover;
}

/* HUD DOTS */
.metro-aiwarn-overlay{
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
}

.metro-aiwarn-overlay .dot{
  position:absolute;
  width:10px;
  height:10px;
  border-radius:50%;
}

.dot.red{background:#ef4444;top:32%;left:48%}
.dot.amber{background:#f59e0b;top:40%;left:62%}
.dot.green{background:#22c55e;top:54%;left:38%}

/* LOG */
.metro-ai-log{
  position: absolute;
  left: 16px;
  bottom: 16px;
  z-index: 4;
  padding: 12px 16px;
  border-radius: 14px;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(10px);
  box-shadow: 0 12px 28px rgba(120,140,210,.28);
  font-size: 13px;
}

.metro-aiwarn-log{
  position:absolute;
  left:16px;
  z-index:4;
  bottom:16px;
  padding:12px 16px;
  border-radius:14px;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);
  box-shadow:0 12px 28px rgba(120,140,210,.28);
  font-size:13px;
}

/* RWD */
@media (max-width:1024px){
  .metro-aiwarn-wrap{
    grid-template-columns:1fr;
    gap:56px;
  }
  .metro-aiwarn-cards{
    grid-template-columns:1fr;
  }
}