/* AnOpenMind 子頁面共用設計系統（草擬版；沿用 DESIGN.md 品牌）。
   純黑沉浸 + 藍紫漸層 + OpenAI 白膠囊按鈕 + 液態玻璃卡。 */
*{ margin:0; padding:0; box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{ background:#000; color:#e8e8ea; overflow-x:hidden; min-height:100svh;
  font-family:'Inter','Noto Sans TC',system-ui,-apple-system,sans-serif; -webkit-font-smoothing:antialiased;
  background-image:radial-gradient(130% 90% at 50% -10%, rgba(30,40,70,.35), transparent 55%); }
a{ color:inherit; }
.flow{ background:linear-gradient(100deg,#eaf0fd,#8ab4f8,#a78bfa,#c9b6ff,#eaf0fd); background-size:220% auto;
  -webkit-background-clip:text; background-clip:text; color:transparent; animation:flow 7s ease-in-out infinite; }
@keyframes flow{ 0%,100%{ background-position:0% center; } 50%{ background-position:100% center; } }

/* ── 導覽 ── */
#nav{ position:fixed; top:0; left:0; right:0; z-index:50; height:56px; display:flex; align-items:center;
  justify-content:space-between; padding:0 5vw; -webkit-backdrop-filter:blur(14px); backdrop-filter:blur(14px);
  background:rgba(0,0,0,.4); border-bottom:1px solid rgba(255,255,255,.06); }
#nav .logo{ font-size:15px; font-weight:800; letter-spacing:.02em; text-decoration:none; }
#nav>.logo{ display:inline-flex; align-items:center; min-height:44px; }
#nav .links{ display:flex; gap:4px; align-items:center; flex-wrap:wrap; }
#nav .links a{ min-height:44px; display:inline-flex; align-items:center; font-size:13px; color:#c4cddd; text-decoration:none; padding:7px 12px; border-radius:9px;
  transition:background .2s, color .2s; }
#nav .links a:hover{ background:rgba(66,133,244,.16); color:#fff; }
#nav .links a.cta{ background:#fff; color:#0a0a0a; font-weight:600; padding:8px 16px; border-radius:999px; }
#nav .links a.cta:hover{ background:#e9edf4; }
.language-cycle{ appearance:none; min-width:48px; min-height:44px; padding:7px 12px; border-radius:999px; cursor:pointer;
  border:1px solid rgba(255,255,255,.16); background:rgba(255,255,255,.055); color:#d6deed;
  font:600 12px/1.2 ui-monospace,SFMono-Regular,Menlo,monospace; letter-spacing:.04em;
  transition:background .2s,border-color .2s,color .2s,transform .2s; }
.language-cycle:hover{ background:rgba(138,180,248,.12); border-color:rgba(138,180,248,.4); color:#fff; transform:translateY(-1px); }
#nav .burger{ display:none; }

/* ── 頁面容器 ── */
main{ max-width:1080px; margin:0 auto; padding:120px 6vw 40px; position:relative; z-index:1; }
.hero-sm{ text-align:center; padding:40px 0 20px; }
.kicker{ font-size:12px; letter-spacing:.22em; text-transform:uppercase; color:#6f7ba0; margin-bottom:16px; }
h1{ font-size:clamp(34px,6vw,68px); font-weight:800; line-height:1.04; letter-spacing:-.02em; }
h2{ font-size:clamp(24px,3.4vw,38px); font-weight:750; letter-spacing:-.01em; margin:8px 0; color:#eef2fb; }
h3{ font-size:19px; font-weight:700; color:#eef2fb; }
.lead{ font-size:clamp(16px,2vw,20px); color:#aeb8cc; max-width:680px; margin:18px auto 0; line-height:1.65; }
p{ line-height:1.7; color:#c4cddd; }
section{ margin:56px 0; }
.muted{ color:#98a2b3; }
strong{ color:#e8ecf6; }

/* ── 玻璃卡 / 格線 ── */
.grid{ display:grid; gap:18px; margin-top:26px; }
.grid.c2{ grid-template-columns:repeat(auto-fit,minmax(280px,1fr)); }
.grid.c3{ grid-template-columns:repeat(auto-fit,minmax(240px,1fr)); }
.card{ padding:24px; border-radius:18px; background:rgba(18,22,30,.5);
  -webkit-backdrop-filter:blur(16px) saturate(1.4); backdrop-filter:blur(16px) saturate(1.4); border:1px solid rgba(255,255,255,.09);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.1); transition:transform .3s, border-color .3s, box-shadow .3s; }
.card:hover{ transform:translateY(-4px); border-color:rgba(130,175,255,.35);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.16), 0 20px 50px rgba(0,0,0,.4), 0 0 34px rgba(66,133,244,.18); }
.card .dot{ width:34px; height:34px; border-radius:11px; margin-bottom:14px;
  background:linear-gradient(140deg,#4285F4,#a78bfa); box-shadow:0 6px 18px rgba(66,133,244,.4); }
.card p{ font-size:14.5px; color:#9aa4b8; margin-top:8px; }

/* ── 定價卡 ── */
.plans{ display:grid; gap:18px; grid-template-columns:repeat(auto-fit,minmax(250px,1fr)); margin-top:30px; }
.plan{ padding:30px 26px; border-radius:20px; background:rgba(18,22,30,.5);
  border:1px solid rgba(255,255,255,.1); display:flex; flex-direction:column; }
.plan.featured{ position:relative; border-color:transparent; box-shadow:0 0 50px rgba(66,133,244,.25); }
.plan.featured::before{ content:''; position:absolute; inset:-1.5px; border-radius:21px; padding:1.5px; pointer-events:none;
  background:linear-gradient(140deg,#4285F4,#8ab4f8,#a78bfa,#c9b6ff,#4285F4);      /* 品牌漸層邊框環 */
  -webkit-mask:linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite:xor; mask:linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0); mask-composite:exclude; }
.plan.featured::after{ content:'最受歡迎'; position:absolute; top:-11px; left:50%; transform:translateX(-50%);
  font-size:11px; font-weight:700; letter-spacing:.1em; color:#0a0a0a; background:#fff;
  padding:3px 12px; border-radius:999px; }
.plan .tag{ font-size:12px; letter-spacing:.14em; text-transform:uppercase; color:#8ea3c7; }
.plan .price{ font-size:40px; font-weight:800; margin:10px 0 4px; letter-spacing:-.02em; }
.plan .price small{ font-size:14px; font-weight:500; color:#98a2b3; }
.plan ul{ list-style:none; margin:18px 0 24px; display:flex; flex-direction:column; gap:10px; }
.plan li{ font-size:14px; color:#c4cddd; padding-left:24px; position:relative; }
.plan li::before{ content:''; position:absolute; left:0; top:6px; width:14px; height:14px; border-radius:50%;
  background:radial-gradient(circle,#8ab4f8 40%,transparent 45%); }
.plan .btn{ margin-top:auto; }

/* ── 按鈕（OpenAI 白膠囊）── */
.btn{ display:inline-flex; align-items:center; justify-content:center; gap:8px; font-size:15px; font-weight:600;
  text-decoration:none; padding:13px 26px; border-radius:999px; background:#fff; color:#0a0a0a; border:none; cursor:pointer;
  transition:transform .25s cubic-bezier(.34,1.56,.64,1), background .25s, box-shadow .25s; }
.btn:hover{ transform:translateY(-2px); background:#e9edf4; box-shadow:0 12px 34px rgba(255,255,255,.18); }
.btn.ghost{ background:transparent; color:#dbe6fb; border:1px solid rgba(255,255,255,.24); }
.btn.ghost:hover{ background:rgba(255,255,255,.08); box-shadow:none; }

/* ── FAQ / 表單 / 法務 ── */
details{ padding:18px 20px; border-radius:14px; background:rgba(18,22,30,.45);
  border:1px solid rgba(255,255,255,.08); margin-bottom:12px; }
details summary{ cursor:pointer; font-weight:600; color:#eef2fb; list-style:none; }
details summary::-webkit-details-marker{ display:none; }
details[open]{ border-color:rgba(130,175,255,.3); }
details p{ margin-top:12px; font-size:14.5px; color:#aeb8cc; }
.field{ display:flex; flex-direction:column; gap:6px; margin-bottom:16px; }
.field label{ font-size:13px; color:#9aa4b8; }
.field input, .field textarea{ background:rgba(255,255,255,.05); border:1px solid rgba(255,255,255,.12);
  border-radius:12px; padding:12px 14px; color:#eef2fb; font-family:inherit; font-size:15px; outline:none; }
.field input:focus, .field textarea:focus{ border-color:rgba(66,133,244,.6); }
.legal{ max-width:760px; }
.legal h2{ font-size:22px; margin-top:36px; }
.legal p, .legal li{ font-size:15px; color:#aeb8cc; line-height:1.75; }
.legal ul{ margin:10px 0 10px 22px; }

/* ── 頁尾 ── */
footer{ border-top:1px solid rgba(255,255,255,.07); margin-top:80px; padding:56px 6vw 40px; position:relative; z-index:1; }
footer .fgrid{ max-width:1080px; margin:0 auto; display:grid; gap:30px;
  grid-template-columns:1.4fr repeat(auto-fit,minmax(140px,1fr)); }
footer .col h4{ font-size:12px; letter-spacing:.14em; text-transform:uppercase; color:#7b86a0; margin-bottom:12px; }
footer .col a{ display:block; font-size:13.5px; color:#aab3c5; text-decoration:none; padding:5px 0; transition:color .2s; }
footer .col a:hover{ color:#fff; }
footer .brand p{ font-size:13px; color:#8a93a6; margin-top:10px; max-width:280px; }
footer .copy{ max-width:1080px; margin:36px auto 0; font-size:12px; color:#5c6780;
  border-top:1px solid rgba(255,255,255,.05); padding-top:22px; }
.clarke-link{ color:#8d98ad; text-decoration:none; border-bottom:1px solid rgba(141,152,173,.25); transition:color .2s,border-color .2s; }
.clarke-link:hover{ color:#eef2fb; border-color:#8ab4f8; }

/* ── reveal ── */
.reveal{ opacity:0; transform:translateY(30px); transition:opacity .8s ease, transform .8s ease; }
.reveal.in{ opacity:1; transform:none; }
@media (prefers-reduced-motion:reduce){ .reveal{ opacity:1; transform:none; transition:none; } }

@media (max-width:720px){
  #nav .links{ gap:4px; } #nav .links a:not(.cta){ display:none; }
  footer .col a{ display:flex; align-items:center; min-height:44px; }
}


/* 法律頁面的資料表（隱私政策的「我們處理什麼」）*/
.legal-table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14px}
.legal-table th,.legal-table td{
  padding:10px 12px;text-align:left;vertical-align:top;
  border-bottom:1px solid rgba(255,255,255,.10)}
.legal-table th{
  font-weight:600;color:#8ab4f8;white-space:nowrap;
  border-bottom-color:rgba(138,180,248,.35)}
.legal-table td:first-child{white-space:nowrap;color:#e8eaed}
@media(max-width:640px){
  .legal-table{font-size:13px}
  .legal-table th,.legal-table td{padding:8px 6px;white-space:normal}
  .legal-table td:first-child{white-space:normal}
}