/**
 * AI 智慧管理系統 首頁樣式（Dynamic Tech UI）
 * 說明：賽博網格＋掃描線＋星雲光暈（融合原波浪意象），玻璃擬態卡片、霓虹外環、3D Tilt、Ripple
 * 版本：v2.0
 * 最後更新：2025-09-10
 */

/* ---------- Design Tokens ---------- */
:root{
  --bg:#0b0f14;
  --card:#0f1520;
  --text:#e7edf5;
  --muted:#9fb0c3;
  --border:#1e2a39;
  --primary-500:#2e7be9;
  --primary-600:#1f66c7;
  --glow:255,255,255;
  --radius-lg:16px;
  --radius-md:12px;
  --radius-sm:10px;
  --shadow-lg:0 10px 30px rgba(0,0,0,.35);
}
@media (prefers-color-scheme: light){
  :root{
    --bg:#f6f8fb;
    --card:#ffffff;
    --text:#142033;
    --muted:#5f6c7d;
    --border:#e6eaf0;
    --glow:46,123,233;
  }
}

/* ---------- Reset / Base ---------- */
*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0; color:var(--text); background:var(--bg);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans TC","Microsoft JhengHei",Arial,sans-serif;
  overflow-x:hidden;
}

/* ---------- 動態背景層：星雲＋賽博網格＋掃描線＋波浪 ---------- */
.scene{ position:fixed; inset:0; pointer-events:none; z-index:0; }

/* 星雲光暈（融合原「波浪」意象：以位移的漸層雲模擬能量流） */
.nebula{
  position:absolute; inset:-20%;
  background:
    radial-gradient(60% 40% at 20% 10%, rgba(87,165,255,.35), transparent 60%),
    radial-gradient(50% 35% at 80% 15%, rgba(99,102,241,.35), transparent 60%),
    radial-gradient(60% 40% at 30% 90%, rgba(16,185,129,.25), transparent 60%);
  filter: blur(42px);
  animation: clouds 16s linear infinite alternate;
}
@keyframes clouds{
  from{ transform:translate3d(-2%,-2%,0) scale(1.02); }
  to  { transform:translate3d( 2%, 2%,0) scale(1.06); }
}

/* 賽博網格 */
.grid{
  position:absolute; inset:0;
  background:
    linear-gradient(0deg,transparent 0 49%, rgba(255,255,255,.06) 50%, transparent 51% 100%),
    linear-gradient(90deg,transparent 0 49%, rgba(255,255,255,.06) 50%, transparent 51% 100%);
  background-size:24px 24px;
  mask-image: radial-gradient(1200px 800px at 50% 20%, black, transparent 70%);
  animation: drift 20s linear infinite;
}
@keyframes drift{
  from{ background-position:0 0,0 0; }
  to  { background-position:0 24px,24px 0; }
}

/* 掃描線 */
.scan{
  position:absolute; inset:0;
  background: linear-gradient(120deg, transparent, rgba(255,255,255,.08), transparent);
  mix-blend-mode: overlay;
  animation: sweep 6s linear infinite;
}
@keyframes sweep{
  from{ transform: translateX(-100%) rotate(0.001deg); }
  to  { transform: translateX(100%)  rotate(0.001deg); }
}

/* （保留原頁面的波浪精神，用星雲＋掃描線達到更一致的科技感） */

/* ---------- 版面 ---------- */
.site-wrapper{ max-width:1200px; margin:0 auto; position:relative; z-index:1; }
.main-content{
  min-height:calc(100dvh - 44px);
  display:flex; flex-direction:column; align-items:center;
  padding:40px 20px 60px;
}

/* LOGO + 標題 */
.logo-area{ text-align:center; margin-top:24px; margin-bottom:16px; }
.site-logo{ width:120px; height:auto; border-radius:14px; background:rgba(255,255,255,.06); }
.system-title{
  margin:16px 0 6px; font-size:28px; font-weight:800; letter-spacing:.02em;
  text-shadow:0 0 18px rgba(var(--glow), .25);
}
.system-subtitle{ font-size:14px; color:var(--muted); }

/* 卡片容器 */
.card-container{
  display:flex; justify-content:center; align-items:stretch; flex-wrap:wrap;
  gap:22px; width:100%; margin:22px 0 32px;
}

/* 玻璃擬態卡片＋霓虹外環 */
.info-card{
  position:relative;
  width:300px; padding:20px; text-align:center;
  background: color-mix(in oklab, var(--card) 82%, transparent);
  border:1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  transition: transform .35s cubic-bezier(.25,.8,.25,1), box-shadow .3s ease;
  isolation:isolate; overflow:hidden;
}
.info-card:focus{ outline:3px solid rgba(46,123,233,.35); outline-offset:2px; }

/* 霓虹外環（與登入頁一致） */
.info-card .ring{
  content:""; position:absolute; inset:-2px; border-radius:calc(var(--radius-lg) + 2px);
  background: conic-gradient(from 0deg,
    rgba(46,123,233, 0.00),
    rgba(46,123,233, 0.25),
    rgba(16,185,129, 0.25),
    rgba(99,102,241, 0.25),
    rgba(46,123,233, 0.25),
    rgba(46,123,233, 0.00)
  );
  filter: blur(12px); z-index:-1; animation:ring 8s linear infinite; opacity:.85; pointer-events:none;
}
@keyframes ring{ to{ transform: rotate(360deg); } }

.info-card:hover{ transform: translateY(-2px) scale(1.02); }

/* Tilt / Wobble */
.tilt-card{ transform-style:preserve-3d; will-change:transform; }
.auto-wobble{ animation: wobble 5s ease-in-out infinite; }
@keyframes wobble{
  0%{ transform: translate(0,0) rotate(0); }
  25%{ transform: translate(1px,-3px) rotate(-0.5deg); }
  50%{ transform: translate(0,0) rotate(0.5deg); }
  75%{ transform: translate(-1px,3px) rotate(0); }
  100%{ transform: translate(0,0) rotate(0); }
}

/* 卡片內容 */
.card-icon{ font-size:40px; margin-bottom:10px; }
.card-title{ font-size:20px; margin-bottom:6px; font-weight:800; }
.card-desc{ font-size:14px; color:var(--muted); margin-bottom:14px; }

/* 主行動按鈕（3D＋Ripple） */
.card-btn{
  position:relative; overflow:hidden; display:inline-block; width:100%;
  padding:12px 14px; border:0; border-radius:var(--radius-sm);
  font-weight:800; font-size:14px; letter-spacing:.01em; cursor:pointer;
  background: linear-gradient(180deg, var(--primary-500), var(--primary-600));
  color:#fff; box-shadow:0 10px 24px rgba(46,123,233,.35), inset 0 -2px 0 rgba(0,0,0,.15);
  transition: transform .15s ease, box-shadow .2s ease, filter .2s ease;
}
.card-btn:hover{ transform: translateY(-1px); box-shadow:0 14px 30px rgba(46,123,233,.4); }
.card-btn:active{ transform: translateY(0); filter:brightness(.98); }
.card-btn:focus-visible{ outline:3px solid rgba(46,123,233,.35); outline-offset:2px; }

/* Ripple */
.ripple-effect{
  position:absolute; width:120px; height:120px; left:50%; top:50%;
  margin-left:-60px; margin-top:-60px; border-radius:999px; pointer-events:none; z-index:2;
  background: radial-gradient(circle, rgba(255,255,255,.6), rgba(255,255,255,0) 70%);
  transform: scale(0); opacity:.8; animation:ripple .7s ease-out forwards;
}
@keyframes ripple{ to{ transform:scale(2.4); opacity:0; } }

/* 內容段落 */
.content-block{ width:100%; padding:0 20px; margin: 8px 0 56px; }
.content-block h2{ font-size:22px; margin-bottom:10px; }
.content-block p{ margin-bottom:10px; color:var(--muted); line-height:1.7; }

/* 固定底部 Footer（玻璃條） */
.fixed-footer{
  position:fixed; left:0; right:0; bottom:0; height:44px; z-index:9999;
  display:flex; align-items:center; justify-content:center; padding:0 10px;
  background: color-mix(in oklab, var(--card) 85%, transparent);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  border-top:1px solid var(--border);
  box-shadow:0 -2px 10px rgba(0,0,0,.18);
  font-size:13px; color:var(--muted);
}

/* RWD */
@media (max-width: 575.98px){
  .site-logo{ width:88px; }
  .system-title{ font-size:22px; }
  .card-container{ flex-direction:column; align-items:center; gap:16px; }
  .info-card{ width:92%; max-width:360px; }
}
@media (max-width: 991.98px){
  .card-container{ gap:18px; }
  .info-card{ width:280px; }
}

/* 動態減量：尊重使用者偏好 */
@media (prefers-reduced-motion: reduce){
  .nebula, .grid, .scan, .info-card .ring{ animation:none !important; }
  .info-card, .card-btn{ transition:none !important; }
}