:root {
  --ink: #0f2a2e;
  --muted: #5b7378;
  --line: rgba(15, 42, 46, 0.12);
  --paper: rgba(255, 255, 255, 0.78);
  --paper-solid: #f7fbfb;
  --teal: #0f8f8a;
  --teal-deep: #0a6a67;
  --mint: #b8f0e8;
  --sand: #e8f4f1;
  --warn: #b45309;
  --danger: #b42318;
  --radius: 18px;
  --shadow: 0 18px 50px rgba(15, 42, 46, 0.1);
  --font-display: "ZCOOL XiaoWei", "Noto Sans SC", serif;
  --font-body: "Noto Sans SC", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, #d7f6f1 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 0%, #cfe8ff 0%, transparent 50%),
    linear-gradient(180deg, #eef8f6 0%, #f5faf9 40%, #eef3f2 100%);
  overflow-x: hidden;
}

.bg-grid {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background-image:
    linear-gradient(rgba(15, 42, 46, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 42, 46, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
}
.bg-orb {
  position: fixed; border-radius: 50%; filter: blur(40px); pointer-events: none; z-index: 0;
  animation: float 12s ease-in-out infinite;
}
.bg-orb-a { width: 280px; height: 280px; background: rgba(15, 143, 138, 0.22); top: 12%; left: -60px; }
.bg-orb-b { width: 360px; height: 360px; background: rgba(80, 150, 220, 0.16); right: -80px; bottom: 10%; animation-delay: -4s; }
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-18px); }
}

.top, main, footer { position: relative; z-index: 1; }

.top {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px clamp(16px, 4vw, 48px);
}
.brand {
  display: flex; align-items: center; gap: 12px; text-decoration: none; color: inherit;
}
.brand-mark {
  width: 44px; height: 44px; border-radius: 14px;
  display: grid; place-items: center;
  background: linear-gradient(145deg, #14b8a6, #0f766e);
  color: #fff; font-family: var(--font-display); font-size: 24px;
  box-shadow: 0 10px 24px rgba(15, 118, 110, 0.28);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-family: var(--font-display); font-size: 22px; font-weight: 400; }
.brand-text em { font-style: normal; color: var(--muted); font-size: 12px; }

.nav { display: flex; gap: 10px; align-items: center; }
.nav a {
  color: var(--muted); text-decoration: none; font-size: 14px; padding: 8px 10px;
}
.nav a:hover { color: var(--teal-deep); }

.hero {
  padding: 28px clamp(16px, 4vw, 48px) 8px;
  max-width: 920px;
  animation: rise 0.7s ease both;
}
@keyframes rise {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: none; }
}
.eyebrow {
  display: inline-block; margin: 0 0 10px;
  color: var(--teal-deep); font-size: 13px; letter-spacing: 0.08em;
}
.hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(42px, 8vw, 72px);
  font-weight: 400;
  letter-spacing: 0.02em;
  line-height: 1;
}
.lead {
  margin: 14px 0 0;
  max-width: 36em;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.7;
}
.cta-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.status { margin: 12px 0 0; color: var(--muted); font-size: 13px; min-height: 1.2em; }

button, .ghost, .primary, .secondary {
  font-family: inherit; cursor: pointer; border: 0; border-radius: 999px;
  padding: 11px 18px; font-size: 14px; transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
button:active { transform: translateY(1px); }
.primary {
  background: linear-gradient(135deg, #11998e, #0f766e);
  color: #fff; box-shadow: 0 10px 24px rgba(15, 118, 110, 0.25);
}
.primary:hover { filter: brightness(1.05); }
.primary:disabled, .secondary:disabled { opacity: 0.45; cursor: not-allowed; filter: none; box-shadow: none; }
.secondary {
  background: rgba(255,255,255,0.7);
  border: 1px solid var(--line); color: var(--ink);
}
.ghost {
  background: transparent; border: 1px solid var(--line); color: var(--ink);
}
.ghost.tiny { padding: 6px 12px; font-size: 12px; }
.block { width: 100%; }

.workspace {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 18px;
  padding: 22px clamp(16px, 4vw, 48px) 40px;
}
@media (max-width: 960px) {
  .workspace { grid-template-columns: 1fr; }
}

.panel {
  background: var(--paper);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,0.7);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
  animation: rise 0.8s ease both;
}
.form-panel { animation-delay: 0.05s; }
.preview-panel { animation-delay: 0.12s; }
.panel-head {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  margin-bottom: 14px;
}
.panel-head.tight { margin-top: 18px; }
.panel-head h2 { margin: 0; font-size: 16px; font-weight: 700; }
.chip {
  font-size: 12px; padding: 5px 10px; border-radius: 999px;
  background: rgba(15, 143, 138, 0.12); color: var(--teal-deep);
}
.chip.pro { background: rgba(180, 83, 9, 0.12); color: var(--warn); }
.muted { color: var(--muted); font-size: 13px; }
.hint { margin: 0 0 10px; color: var(--muted); font-size: 13px; line-height: 1.5; }

.grid-2 {
  display: grid; grid-template-columns: 1fr 1fr; gap: 12px;
}
@media (max-width: 640px) { .grid-2 { grid-template-columns: 1fr; } }
label {
  display: flex; flex-direction: column; gap: 6px;
  font-size: 12px; color: var(--muted);
}
input, textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.85);
  border-radius: 12px;
  padding: 10px 12px;
  font: inherit; color: var(--ink);
  outline: none;
}
input:focus, textarea:focus {
  border-color: rgba(15, 143, 138, 0.55);
  box-shadow: 0 0 0 3px rgba(15, 143, 138, 0.12);
}
textarea {
  resize: vertical; min-height: 180px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13px; line-height: 1.5;
}
.row-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }

.preview-list {
  display: flex; flex-direction: column; gap: 14px;
  max-height: 720px; overflow: auto; padding-right: 4px;
}
.empty {
  padding: 40px 16px; text-align: center; color: var(--muted); font-size: 14px;
}

.slip {
  position: relative;
  background: linear-gradient(180deg, #ffffff 0%, #f4fbfa 100%);
  border: 1px solid rgba(15, 42, 46, 0.08);
  border-radius: 16px;
  padding: 16px 16px 14px;
  overflow: hidden;
}
.slip-head {
  display: flex; justify-content: space-between; align-items: flex-start; gap: 10px;
  padding-bottom: 12px; border-bottom: 1px dashed rgba(15, 42, 46, 0.14);
}
.slip-company {
  font-family: var(--font-display); font-size: 20px; line-height: 1.2;
}
.slip-period { color: var(--muted); font-size: 12px; margin-top: 4px; }
.slip-net {
  text-align: right;
}
.slip-net span { display: block; font-size: 11px; color: var(--muted); }
.slip-net strong {
  font-size: 24px; color: var(--teal-deep); font-weight: 700; letter-spacing: 0.02em;
}
.slip-person {
  display: flex; justify-content: space-between; gap: 8px;
  margin: 12px 0 8px; font-size: 14px;
}
.slip-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 6px 14px;
  font-size: 13px;
}
.slip-grid div { display: flex; justify-content: space-between; gap: 8px; padding: 4px 0; }
.slip-grid dt { color: var(--muted); }
.slip-grid dd { margin: 0; font-variant-numeric: tabular-nums; }
.slip-foot {
  margin-top: 12px; padding-top: 10px;
  border-top: 1px dashed rgba(15, 42, 46, 0.14);
  display: flex; justify-content: space-between; gap: 8px;
  color: var(--muted); font-size: 12px;
}
.watermark {
  position: absolute; inset: 0; pointer-events: none;
  display: grid; place-items: center;
  font-family: var(--font-display);
  font-size: 42px; color: rgba(15, 118, 110, 0.08);
  transform: rotate(-18deg); user-select: none;
}

.pricing {
  padding: 10px clamp(16px, 4vw, 48px) 48px;
}
.pricing h2 {
  font-family: var(--font-display); font-weight: 400; font-size: 28px; margin: 0 0 14px;
}
.price-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px;
}
@media (max-width: 860px) { .price-grid { grid-template-columns: 1fr; } }
.price-grid article {
  background: rgba(255,255,255,0.65);
  border: 1px solid rgba(255,255,255,0.8);
  border-radius: 16px; padding: 16px;
}
.price-grid h3 { margin: 0 0 8px; font-size: 16px; }
.price-grid p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.6; }
.contact { margin-top: 16px; color: var(--muted); font-size: 14px; }

footer {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px;
  padding: 18px clamp(16px, 4vw, 48px) 28px;
  color: var(--muted); font-size: 13px;
  border-top: 1px solid var(--line);
}
footer a { color: var(--teal-deep); text-decoration: none; }

.modal {
  position: fixed; inset: 0; z-index: 50;
  background: rgba(15, 42, 46, 0.35);
  display: grid; place-items: center; padding: 16px;
}
.modal.hidden { display: none; }
.modal-card {
  width: min(420px, 100%);
  background: #fff; border-radius: 18px; padding: 22px;
  box-shadow: var(--shadow); position: relative;
  animation: rise 0.25s ease both;
}
.modal-card h3 { margin: 0 0 8px; font-family: var(--font-display); font-size: 26px; font-weight: 400; }
.modal-card p { margin: 0 0 12px; color: var(--muted); font-size: 14px; }
.modal-card .close {
  position: absolute; top: 10px; right: 12px;
  background: transparent; border: 0; font-size: 24px; color: var(--muted); padding: 4px 8px;
}
.modal-msg { min-height: 1.2em; font-size: 13px; color: var(--teal-deep); }
.modal-msg.error { color: var(--danger); }

#export-stage {
  position: fixed; left: -9999px; top: 0; width: 420px;
}