/* ============================================================
   Mebular · 站点共享样式（定价 / 等待名单）
   沿用 index.html 的深色星空主题与配色
   ============================================================ */

:root {
  --bg:            #03050a;
  --text:          #c8d0e0;
  --text-strong:   #aec8f0;
  --text-muted:    #8898b0;
  --text-dim:      #5a7a9a;
  --text-faint:    #4a6a8a;

  --accent:        #8ac8ff;
  --accent-line:   #4a8acf;
  --accent-violet: #c8a0ff;
  --accent-violet-dim: #7a6aaa;

  --border:        rgba(80,160,255,0.12);
  --border-soft:   rgba(80,160,255,0.06);
  --panel:         rgba(8,12,28,0.55);
  --panel-soft:    rgba(10,20,50,0.2);

  --nav-h:         60px;
  --radius:        12px;
  --font-mono:     'SF Mono','Cascadia Code','Source Code Pro',Consolas,monospace;
}

*, *::before, *::after { box-sizing:border-box; margin:0; padding:0; }

html { scroll-behavior:smooth; }

body {
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-mono);
  min-height:100vh;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

/* ===== 星空铺底 ===== */
#bg-canvas {
  position:fixed;
  top:0; left:0;
  width:100vw; height:100vh;
  display:block;
  z-index:0;
  pointer-events:none;
}

/* ===== 导航 ===== */
nav {
  position:fixed;
  top:0; left:0; right:0;
  z-index:30;
  display:flex;
  align-items:center;
  justify-content:center;
  flex-wrap:wrap;
  gap:0;
  padding:16px 24px;
  background:rgba(3,5,10,0.5);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
  transition:background 0.3s ease;
}
nav .brand {
  font-size:0.68rem;
  letter-spacing:0.4em;
  text-transform:uppercase;
  color:var(--text-dim);
  margin-right:32px;
  user-select:none;
  text-decoration:none;
  transition:color 0.2s;
}
nav .brand:hover { color:var(--accent); }
nav .links { display:flex; gap:30px; align-items:center; }
nav a {
  color:#6a8aaa;
  text-decoration:none;
  font-size:0.7rem;
  letter-spacing:0.15em;
  text-transform:uppercase;
  transition:color 0.2s, text-shadow 0.2s;
  position:relative;
}
nav a:hover { color:var(--accent); text-shadow:0 0 12px rgba(80,180,255,0.3); }
nav a::after {
  content:'';
  position:absolute;
  bottom:-3px; left:0;
  width:0; height:1px;
  background:var(--accent-line);
  transition:width 0.25s ease;
  box-shadow:0 0 6px var(--accent-line);
}
nav a:hover::after { width:100%; }
nav a.is-active { color:var(--accent); }
nav a.is-active::after { width:100%; }

.lang-toggle {
  margin-left:24px;
  padding:5px 12px;
  background:rgba(20,40,80,0.3);
  border:1px solid var(--border);
  border-radius:20px;
  color:#8ac8ff;
  font-family:inherit;
  font-size:0.62rem;
  letter-spacing:0.2em;
  text-transform:uppercase;
  cursor:pointer;
  transition:background 0.2s, border-color 0.2s, color 0.2s;
  line-height:1.4;
}
.lang-toggle:hover {
  background:rgba(30,60,120,0.4);
  border-color:rgba(80,160,255,0.28);
}

/* ===== 布局容器 ===== */
.wrap {
  position:relative;
  z-index:10;
  width:100%;
  max-width:1080px;
  margin:0 auto;
  padding:calc(var(--nav-h) + 80px) 28px 60px;
}
.wrap.narrow { max-width:720px; }

/* ===== 页头 ===== */
.page-head { text-align:center; margin-bottom:56px; }
.page-head .tag {
  display:inline-block;
  font-size:0.62rem;
  letter-spacing:0.5em;
  text-transform:uppercase;
  color:#4a7a9a;
  border:1px solid var(--border);
  padding:6px 16px;
  border-radius:20px;
  margin-bottom:22px;
  background:rgba(20,40,80,0.25);
}
.page-head h1 {
  font-size:clamp(2rem, 6vw, 3.2rem);
  font-weight:300;
  letter-spacing:0.3em;
  text-transform:uppercase;
  background:linear-gradient(135deg, #8ac8ff 0%, #c8a0ff 40%, #8ac8ff 80%);
  background-size:200% 200%;
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  animation:shimmer 6s ease-in-out infinite;
  filter:drop-shadow(0 0 18px rgba(80,180,255,0.2));
}
@keyframes shimmer {
  0%,100% { background-position:0% 50%; }
  50% { background-position:100% 50%; }
}
.page-head p {
  max-width:620px;
  margin:18px auto 0;
  font-size:clamp(0.92rem, 2.2vw, 1.05rem);
  line-height:1.9;
  color:var(--text-muted);
  letter-spacing:0.05em;
}
.page-head .billing-note {
  margin-top:16px;
  font-size:0.68rem;
  letter-spacing:0.15em;
  color:var(--text-faint);
}

/* ===== 定价网格 ===== */
.pricing-grid {
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:22px;
  align-items:stretch;
}

.plan {
  position:relative;
  display:flex;
  flex-direction:column;
  background:var(--panel);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:32px 26px;
  overflow:hidden;
  box-shadow:0 4px 32px rgba(0,0,0,0.5),
      inset 0 1px 0 rgba(255,255,255,0.04);
  transition:transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.plan::before {
  content:'';
  position:absolute;
  top:0; left:0; right:0; height:1px;
  background:linear-gradient(90deg,
      transparent,
      rgba(80,180,255,0.25),
      rgba(160,120,255,0.2),
      transparent);
}
.plan:hover {
  transform:translateY(-4px);
  border-color:rgba(80,160,255,0.24);
  box-shadow:0 10px 40px rgba(0,0,0,0.6),
      inset 0 1px 0 rgba(255,255,255,0.05);
}
.plan.featured {
  border-color:rgba(120,160,255,0.32);
  box-shadow:0 6px 40px rgba(40,90,180,0.28),
      inset 0 1px 0 rgba(255,255,255,0.06);
  transform:translateY(-6px);
}
.plan.featured:hover { transform:translateY(-10px); }

.plan .badge {
  position:absolute;
  top:14px; right:14px;
  font-size:0.52rem;
  letter-spacing:0.28em;
  text-transform:uppercase;
  color:#0a1428;
  background:linear-gradient(135deg, #8ac8ff, #c8a0ff);
  padding:4px 10px;
  border-radius:20px;
  font-weight:600;
}
.plan .plan-name {
  font-size:0.72rem;
  letter-spacing:0.4em;
  text-transform:uppercase;
  color:#5a8aaa;
  margin-bottom:16px;
}
.plan .price-row {
  display:flex;
  align-items:baseline;
  gap:8px;
  margin-bottom:8px;
}
.plan .price {
  font-size:2.4rem;
  font-weight:300;
  letter-spacing:0.02em;
  color:var(--accent);
  text-shadow:0 0 18px rgba(80,180,255,0.18);
}
.plan .period {
  font-size:0.72rem;
  letter-spacing:0.1em;
  color:var(--text-faint);
}
.plan .plan-desc {
  font-size:0.78rem;
  line-height:1.75;
  color:var(--text-muted);
  padding-bottom:20px;
  border-bottom:1px solid var(--border-soft);
  margin-bottom:20px;
  min-height:56px;
}
.plan .features {
  list-style:none;
  display:flex;
  flex-direction:column;
  gap:12px;
  margin-bottom:28px;
  flex:1;
}
.plan .features li {
  position:relative;
  padding-left:22px;
  font-size:0.8rem;
  line-height:1.6;
  color:#8ab0d0;
}
.plan .features li::before {
  content:'✦';
  position:absolute;
  left:0; top:-1px;
  font-size:0.7rem;
  color:var(--accent-line);
}
.plan.featured .features li::before { color:var(--accent-violet); }

/* ===== 按钮 ===== */
.btn {
  display:block;
  width:100%;
  padding:13px 18px;
  border-radius:8px;
  font-family:inherit;
  font-size:0.72rem;
  letter-spacing:0.2em;
  text-transform:uppercase;
  text-align:center;
  text-decoration:none;
  cursor:pointer;
  border:1px solid var(--border);
  background:rgba(20,40,80,0.3);
  color:#8ac8ff;
  transition:background 0.2s, border-color 0.2s, color 0.2s, transform 0.15s, box-shadow 0.2s;
}
.btn:hover {
  background:rgba(30,60,120,0.4);
  border-color:rgba(80,160,255,0.28);
  box-shadow:0 0 24px rgba(80,180,255,0.12);
}
.btn:active { transform:translateY(1px); }
.btn.primary {
  background:linear-gradient(135deg, rgba(70,130,230,0.85), rgba(140,100,220,0.8));
  border-color:rgba(140,180,255,0.4);
  color:#eaf3ff;
  box-shadow:0 0 28px rgba(80,140,255,0.2);
}
.btn.primary:hover {
  background:linear-gradient(135deg, rgba(90,150,245,0.95), rgba(160,120,235,0.9));
  border-color:rgba(160,200,255,0.55);
  box-shadow:0 0 36px rgba(90,150,255,0.3);
}

/* ===== FAQ ===== */
.faq { margin-top:72px; }
.faq > h2,
.section-title {
  font-size:0.72rem;
  letter-spacing:0.4em;
  text-transform:uppercase;
  color:#5a8aaa;
  margin-bottom:24px;
  display:flex;
  align-items:center;
  gap:12px;
}
.section-title::before {
  content:'';
  width:20px; height:1px;
  background:rgba(80,180,255,0.3);
}
.faq-list { display:flex; flex-direction:column; gap:12px; }
.faq-item {
  background:var(--panel);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:0 22px;
  overflow:hidden;
}
.faq-item summary {
  list-style:none;
  cursor:pointer;
  padding:18px 0;
  font-size:0.84rem;
  letter-spacing:0.05em;
  color:#aec8f0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}
.faq-item summary::-webkit-details-marker { display:none; }
.faq-item summary::after {
  content:'+';
  color:var(--accent-line);
  font-size:1rem;
  line-height:1;
  transition:transform 0.25s ease, color 0.25s ease;
  flex-shrink:0;
}
.faq-item[open] summary::after {
  content:'−';
  color:var(--accent);
  transform:rotate(180deg);
}
.faq-item .faq-body {
  padding:0 0 20px;
  font-size:0.82rem;
  line-height:1.85;
  color:var(--text-muted);
}

/* ===== 等待名单表单 ===== */
.form-card {
  background:var(--panel);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:40px 36px;
  box-shadow:0 4px 32px rgba(0,0,0,0.5),
      inset 0 1px 0 rgba(255,255,255,0.04);
  position:relative;
  overflow:hidden;
}
.form-card::before {
  content:'';
  position:absolute;
  top:0; left:0; right:0; height:1px;
  background:linear-gradient(90deg,
      transparent,
      rgba(80,180,255,0.25),
      rgba(160,120,255,0.2),
      transparent);
}
.field { margin-bottom:22px; text-align:left; }
.field label {
  display:block;
  font-size:0.62rem;
  letter-spacing:0.3em;
  text-transform:uppercase;
  color:#5a8aaa;
  margin-bottom:10px;
}
.field .req { color:var(--accent-violet-dim); margin-left:4px; }
.field input,
.field select {
  width:100%;
  padding:13px 15px;
  background:rgba(6,10,24,0.7);
  border:1px solid var(--border);
  border-radius:8px;
  color:var(--text);
  font-family:inherit;
  font-size:0.85rem;
  letter-spacing:0.04em;
  transition:border-color 0.2s, box-shadow 0.2s, background 0.2s;
  appearance:none;
  -webkit-appearance:none;
}
.field input::placeholder { color:#3f5875; }
.field input:focus,
.field select:focus {
  outline:none;
  border-color:rgba(80,160,255,0.4);
  background:rgba(10,18,40,0.8);
  box-shadow:0 0 0 3px rgba(80,160,255,0.08);
}
.field select {
  cursor:pointer;
  background-image:linear-gradient(45deg, transparent 50%, #6a8aaa 50%),
                   linear-gradient(135deg, #6a8aaa 50%, transparent 50%);
  background-position:calc(100% - 20px) calc(50% - 2px),
                      calc(100% - 15px) calc(50% - 2px);
  background-size:5px 5px, 5px 5px;
  background-repeat:no-repeat;
}
.field select option { background:#0a1224; color:var(--text); }
.field input:invalid:not(:placeholder-shown) {
  border-color:rgba(200,90,120,0.45);
}
.form-note {
  margin-top:16px;
  font-size:0.66rem;
  line-height:1.7;
  color:var(--text-faint);
  letter-spacing:0.04em;
  text-align:center;
}
.form-status {
  margin-top:16px;
  font-size:0.72rem;
  line-height:1.6;
  min-height:1em;
  text-align:center;
}
.form-status.error { color:#d08a9a; }

/* 成功态 */
.form-success {
  text-align:center;
  padding:20px 8px;
}
.form-success .check {
  width:56px; height:56px;
  margin:0 auto 20px;
  border-radius:50%;
  border:1px solid rgba(80,160,255,0.3);
  background:radial-gradient(circle at 50% 45%, rgba(80,180,255,0.25), rgba(10,20,50,0.2) 70%);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1.4rem;
  color:var(--accent);
  box-shadow:0 0 30px rgba(80,180,255,0.2);
}
.form-success h2 {
  font-size:0.9rem;
  font-weight:400;
  letter-spacing:0.25em;
  text-transform:uppercase;
  color:#aec8f0;
  margin-bottom:14px;
}
.form-success p {
  font-size:0.82rem;
  line-height:1.85;
  color:var(--text-muted);
  max-width:440px;
  margin:0 auto 24px;
}

/* ===== 页脚 ===== */
footer {
  position:relative;
  z-index:10;
  text-align:center;
  padding:36px 24px 28px;
  color:#3a4a6a;
  font-size:0.68rem;
  letter-spacing:0.15em;
  border-top:1px solid var(--border-soft);
  margin-top:36px;
}
footer a { color:#5a8aaa; text-decoration:none; transition:color 0.2s; }
footer a:hover { color:var(--accent); }
footer .foot-brand {
  font-size:0.62rem;
  letter-spacing:0.4em;
  text-transform:uppercase;
  margin-bottom:6px;
  color:#3a5a7a;
}

/* 逐段浮现 */
.reveal { animation:revealUp 0.7s cubic-bezier(.4,0,.2,1) both; }
.reveal.d1 { animation-delay:0.08s; }
.reveal.d2 { animation-delay:0.16s; }
.reveal.d3 { animation-delay:0.24s; }
.reveal.d4 { animation-delay:0.32s; }
@keyframes revealUp {
  from { opacity:0; transform:translateY(16px); }
  to   { opacity:1; transform:translateY(0); }
}
@media (prefers-reduced-motion:reduce) {
  .reveal, .page-head h1 { animation:none; }
  html { scroll-behavior:auto; }
  .plan, .plan.featured { transition:none; }
}

/* ===== 响应式 ===== */
@media (max-width:900px) {
  .pricing-grid {
    grid-template-columns:1fr;
    max-width:460px;
    margin:0 auto;
    gap:18px;
  }
  .plan.featured { transform:none; }
  .plan.featured:hover { transform:translateY(-4px); }
}

@media (max-width:640px) {
  nav { padding:14px 16px; }
  nav .links { gap:14px; }
  nav a { font-size:0.62rem; letter-spacing:0.1em; }
  nav .brand { margin-right:14px; font-size:0.6rem; }
  .lang-toggle { margin-left:12px; padding:4px 9px; font-size:0.56rem; }
  .wrap { padding:calc(var(--nav-h) + 90px) 18px 44px; }
  .page-head { margin-bottom:40px; }
  .page-head h1 { letter-spacing:0.18em; }
  .plan { padding:26px 20px; }
  .form-card { padding:28px 20px; }
  .faq-item { padding:0 16px; }
  .faq-item summary { font-size:0.8rem; }
}

@media (max-width:400px) {
  nav .links { gap:10px; }
  nav a { font-size:0.58rem; letter-spacing:0.06em; }
  .plan .price { font-size:2rem; }
}