:root {
  --bg: #05060f;
  --bg-2: #0a0c1c;
  --panel: rgba(18, 22, 48, 0.55);
  --border: rgba(88, 140, 255, 0.18);
  --accent: #4d8dff;
  --accent-2: #00e5ff;
  --accent-3: #b06bff;
  --text: #e8ecff;
  --text-dim: #8a93b8;
  --danger: #ff4d6d;
  --success: #2effb8;
  --gold: #ffcf5c;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans SC', 'Rajdhani', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

#starfield { position: fixed; inset: 0; z-index: 0; pointer-events: none; }
.grid-overlay {
  position: fixed; inset: 0; z-index: 1; pointer-events: none;
  background-image:
    linear-gradient(rgba(88,140,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(88,140,255,0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 40%, transparent 80%);
}
.glow { position: fixed; border-radius: 50%; filter: blur(120px); z-index: 0; pointer-events: none; opacity: 0.5; }
.glow-a { width: 600px; height: 600px; background: rgba(77,141,255,0.25); top: -200px; right: -200px; }
.glow-b { width: 500px; height: 500px; background: rgba(176,107,255,0.2); bottom: -200px; left: -150px; }

.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(5,6,15,0.7);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; gap: 24px;
  padding: 14px 24px;
}
.brand { display: flex; align-items: center; gap: 8px; text-decoration: none; }
.brand-mark { color: var(--accent-2); font-size: 22px; text-shadow: 0 0 12px var(--accent-2); }
.brand-text { font-family: 'Orbitron', sans-serif; font-weight: 700; letter-spacing: 2px; font-size: 18px; color: var(--text); }
.accent { color: var(--accent-2); }
.nav-links { display: flex; gap: 22px; margin-left: 24px; }
.nav-links a { color: var(--text-dim); text-decoration: none; font-size: 14px; transition: color .2s; }
.nav-links a:hover { color: var(--accent-2); }
.nav-right { margin-left: auto; display: flex; gap: 10px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: 'Rajdhani', 'Noto Sans SC', sans-serif;
  font-weight: 600; font-size: 15px;
  border: none; cursor: pointer; text-decoration: none;
  border-radius: 8px; padding: 10px 22px;
  transition: all .2s ease; letter-spacing: 0.5px;
  position: relative; overflow: hidden;
}
.btn-sm { padding: 7px 16px; font-size: 13px; }
.btn-lg { padding: 14px 34px; font-size: 17px; }
.btn-block { width: 100%; }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-3));
  color: #fff; box-shadow: 0 4px 24px rgba(77,141,255,0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(77,141,255,0.5); }
.btn-outline { background: transparent; color: var(--accent-2); border: 1px solid var(--accent); }
.btn-outline:hover { background: rgba(77,141,255,0.12); }
.btn-ghost { background: rgba(255,255,255,0.06); color: var(--text-dim); }
.btn-ghost:hover { background: rgba(255,255,255,0.12); color: var(--text); }

.hero {
  position: relative; z-index: 2;
  max-width: 1200px; margin: 0 auto;
  padding: 80px 24px 60px;
  display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; align-items: center;
  min-height: 70vh;
}
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(46,255,184,0.08); border: 1px solid rgba(46,255,184,0.25);
  color: var(--success); border-radius: 20px; padding: 6px 14px; font-size: 13px;
}
.pulse-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--success); animation: pulse 1.6s infinite; }
@keyframes pulse { 0%,100% { box-shadow: 0 0 0 0 rgba(46,255,184,0.6); } 50% { box-shadow: 0 0 0 8px rgba(46,255,184,0); } }

.hero-title { font-size: 52px; line-height: 1.15; font-weight: 700; margin: 24px 0; }
.hero-title .line { display: block; }
.hero-title .gradient {
  background: linear-gradient(90deg, var(--accent-2), var(--accent), var(--accent-3));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  font-size: 40px;
}
.hero-sub { color: var(--text-dim); font-size: 18px; margin-bottom: 32px; }
.hero-actions { display: flex; gap: 16px; margin-bottom: 48px; }

.hero-stats { display: flex; gap: 40px; flex-wrap: wrap; }
.stat .stat-num { font-family: 'Orbitron', sans-serif; font-size: 30px; font-weight: 700; color: var(--accent-2); text-shadow: 0 0 16px rgba(0,229,255,0.4); }
.stat .stat-label { font-size: 13px; color: var(--text-dim); margin-top: 4px; }

.hero-orb { position: relative; width: 360px; height: 360px; margin: 0 auto; }
.orb-ring { position: absolute; inset: 0; border-radius: 50%; border: 1px solid rgba(77,141,255,0.3); }
.ring1 { animation: spin 8s linear infinite; border-top-color: var(--accent-2); }
.ring2 { inset: 40px; animation: spin 12s linear infinite reverse; border-right-color: var(--accent-3); }
.ring3 { inset: 90px; animation: spin 16s linear infinite; border-bottom-color: var(--accent); }
.orb-core {
  position: absolute; inset: 130px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: 'Orbitron', sans-serif; font-weight: 900; font-size: 26px;
  background: radial-gradient(circle, rgba(77,141,255,0.35), rgba(176,107,255,0.15));
  color: #fff; box-shadow: 0 0 60px rgba(77,141,255,0.5), inset 0 0 40px rgba(0,229,255,0.3);
}
@keyframes spin { to { transform: rotate(360deg); } }

.section { position: relative; z-index: 2; max-width: 1200px; margin: 0 auto; padding: 60px 24px; }
.section-head { text-align: center; margin-bottom: 40px; }
.section-title { font-family: 'Orbitron', 'Noto Sans SC', sans-serif; font-size: 34px; font-weight: 700; letter-spacing: 2px; }
.section-sub { color: var(--text-dim); margin-top: 8px; }

.rent-panel {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 32px;
  background: var(--panel); border: 1px solid var(--border); border-radius: 16px;
  padding: 36px; backdrop-filter: blur(10px);
}
.field { display: block; margin-bottom: 24px; }
.field-label { display: block; font-size: 14px; color: var(--text-dim); margin-bottom: 8px; }
.input-group { display: flex; gap: 10px; align-items: center; }
.input-group input {
  flex: 1; background: rgba(5,6,15,0.6); border: 1px solid var(--border);
  color: var(--text); border-radius: 8px; padding: 12px 16px; font-size: 15px; outline: none;
  transition: border-color .2s;
}
.input-group input:focus { border-color: var(--accent); }
.unit { color: var(--text-dim); font-size: 14px; white-space: nowrap; }

.segmented { display: flex; gap: 8px; }
.seg {
  flex: 1; background: rgba(5,6,15,0.6); border: 1px solid var(--border);
  color: var(--text-dim); border-radius: 8px; padding: 10px; cursor: pointer;
  font-family: 'Rajdhani', sans-serif; font-size: 14px; transition: all .2s;
}
.seg:hover { border-color: var(--accent); color: var(--text); }
.seg.active { background: rgba(77,141,255,0.15); border-color: var(--accent); color: var(--accent-2); }

.estimate { background: rgba(5,6,15,0.5); border-radius: 12px; padding: 18px 20px; }
.estimate-row { display: flex; justify-content: space-between; padding: 6px 0; font-size: 14px; }
.estimate-row span:first-child { color: var(--text-dim); }
.estimate-val { color: var(--accent-2); font-family: 'Orbitron', sans-serif; }

.rent-summary { background: rgba(5,6,15,0.5); border-radius: 12px; padding: 20px; margin-bottom: 20px; }
.summary-title { font-family: 'Orbitron', sans-serif; font-weight: 700; margin-bottom: 14px; letter-spacing: 1px; }
.summary-line { display: flex; justify-content: space-between; padding: 6px 0; font-size: 14px; border-bottom: 1px solid rgba(88,140,255,0.08); }
.summary-line span:first-child { color: var(--text-dim); }
.summary-line span:last-child { color: var(--text); word-break: break-all; text-align: right; }
.rent-right .btn { margin-bottom: 12px; }

.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.plan-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 16px;
  padding: 32px; text-align: center; transition: transform .25s, box-shadow .25s;
  position: relative;
}
.plan-card:hover { transform: translateY(-6px); box-shadow: 0 16px 40px rgba(0,0,0,0.4); }
.plan-card.featured { border-color: var(--accent); box-shadow: 0 0 40px rgba(77,141,255,0.25); }
.plan-badge {
  display: inline-block; font-size: 12px; padding: 4px 12px; border-radius: 20px;
  background: rgba(77,141,255,0.15); color: var(--accent-2); margin-bottom: 16px;
}
.featured .plan-badge { background: linear-gradient(135deg, var(--accent), var(--accent-3)); color: #fff; }
.plan-name { font-family: 'Orbitron', sans-serif; font-size: 22px; font-weight:700; letter-spacing: 3px; }
.plan-price { font-family: 'Orbitron', sans-serif; font-size: 44px; font-weight: 900; color: var(--accent-2); margin: 12px 0; text-shadow: 0 0 20px rgba(0,229,255,0.4); }
.plan-price span { font-size: 18px; }
.plan-unit { color: var(--text-dim); font-size: 14px; margin-bottom: 20px; }
.plan-features { list-style: none; text-align: left; margin-bottom: 28px; }
.plan-features li { padding: 6px 0; font-size: 14px; color: var(--text-dim); }
.plan-features li::before { content: '◆'; color: var(--accent-2); margin-right: 8px; font-size: 10px; }

.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.step { text-align: center; padding: 28px; background: var(--panel); border: 1px solid var(--border); border-radius: 16px; }
.step-num { font-family: 'Orbitron', sans-serif; font-size: 32px; font-weight: 900; color: var(--accent); opacity: 0.6; }
.step-title { font-size: 17px; font-weight: 600; margin: 10px 0 6px; }
.step-desc { font-size: 13px; color: var(--text-dim); }

.orders-panel { background: var(--panel); border: 1px solid var(--border); border-radius: 16px; padding: 36px; }
.orders-empty { text-align: center; padding: 40px 0; }
.empty-icon { font-size: 48px; color: var(--accent); opacity: 0.4; margin-bottom: 12px; }
.orders-empty p { color: var(--text-dim); margin-bottom: 20px; }
.orders-table { width: 100%; border-collapse: collapse; }
.orders-table th, .orders-table td { padding: 14px; text-align: left; border-bottom: 1px solid rgba(88,140,255,0.1); font-size: 14px; }
.orders-table th { color: var(--text-dim); font-weight: 600; }
.hidden { display: none !important; }

.faq { max-width: 800px; margin: 0 auto; }
.faq-item { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; margin-bottom: 12px; padding: 4px 20px; }
.faq-item summary { cursor: pointer; padding: 14px 0; font-size: 16px; font-weight: 500; list-style: none; }
.faq-item summary::after { content: '+'; float: right; color: var(--accent-2); font-size: 20px; }
.faq-item[open] summary::after { content: '−'; }
.faq-item p { color: var(--text-dim); padding: 0 0 16px; font-size: 14px; }

.footer { position: relative; z-index: 2; border-top: 1px solid var(--border); padding: 40px 24px; background: rgba(5,6,15,0.6); }
.footer-inner { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.footer-brand { display: flex; align-items: center; gap: 8px; }
.footer-links { display: flex; gap: 20px; }
.footer-links a { color: var(--text-dim); text-decoration: none; font-size: 14px; }
.footer-links a:hover { color: var(--accent-2); }
.footer-copy { color: var(--text-dim); font-size: 13px; }

.float-service {
  position: fixed; right: 24px; bottom: 24px; z-index: 60;
  width: 54px; height: 54px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-3));
  border: none; cursor: pointer; color: #fff; font-size: 22px;
  box-shadow: 0 6px 24px rgba(77,141,255,0.5);
  transition: transform .2s;
}
.float-service:hover { transform: scale(1.1); }

.modal-overlay {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(3,4,10,0.7); backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center;
  animation: fadeIn .2s ease;
}
.modal {
  background: var(--bg-2); border: 1px solid var(--accent); border-radius: 18px;
  padding: 40px 44px; text-align: center; max-width: 420px; width: 90%;
  box-shadow: 0 0 60px rgba(77,141,255,0.3);
  animation: scaleIn .25s ease;
}
.modal-icon { font-size: 40px; color: var(--accent-2); text-shadow: 0 0 20px var(--accent-2); margin-bottom: 12px; animation: pulse 1.6s infinite; }
.modal-title { font-family: 'Orbitron', sans-serif; font-size: 22px; font-weight: 700; margin-bottom: 10px; }
.modal-text { color: var(--text-dim); margin-bottom: 8px; font-size: 15px; }
.modal-action {
  display: inline-block; background: rgba(77,141,255,0.12); color: var(--accent-2);
  border-radius: 6px; padding: 4px 12px; font-size: 13px; margin-bottom: 24px;
  font-family: monospace;
}
/* 登录/注册弹窗 */
.auth-fields input {
  width: 100%;
  background: rgba(5,6,15,0.6);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 15px;
  outline: none;
  margin-bottom: 12px;
}
.auth-fields input:focus { border-color: var(--accent); }
.auth-err { color: var(--danger); font-size: 13px; margin-bottom: 10px; min-height: 18px; text-align: left; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes scaleIn { from { transform: scale(0.9); opacity: 0; } to { transform: scale(1); opacity: 1; } }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; text-align: center; }
  .hero-orb { width: 240px; height: 240px; }
  .orb-ring { inset: 0; }
  .ring2 { inset: 28px; }
  .ring3 { inset: 62px; }
  .orb-core { inset: 88px; font-size: 18px; }
  .rent-panel { grid-template-columns: 1fr; }
  .plans { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
  .hero-title { font-size: 38px; }
  .hero-title .gradient { font-size: 30px; }
}