:root {
  /* Light / Element-UI-like */
  --bg: #f6f8fb;
  --surface: #ffffff;
  --surface-2: #f9fbff;
  --border: #d9ecff;
  --border-strong: #b3d8ff;
  --text: #303133;
  --muted: #606266;
  --accent: #409eff;
  --accent-2: #79bbff;
  --danger: #f56c6c;
  --ok: #67c23a;
  --shadow: 0 8px 24px rgba(31, 45, 61, 0.10);
  --shadow-soft: 0 2px 10px rgba(31, 45, 61, 0.06);
  --radius: 12px;
  --radius-sm: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  width: min(1100px, 100%);
  margin: 0 auto;
  padding: 24px;
}

.banner {
  background:#ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin-top: 16px;
  position: relative;
  overflow: hidden;
}

.banner h1 {
  margin: 0;
  font-size: 26px;
  line-height: 1.25;
  letter-spacing: 0.2px;
}

.banner h2 {
  margin: 0;
  font-size: 18px;
  line-height: 1.3;
}

.banner p {
  margin: 10px 0 0;
  color: var(--muted);
}

.row {
  display: flex;
  gap: 16px;
  margin-top: 16px;
}

.footer {
  margin-top: 16px;
}

.steps {
  margin: 12px 0 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.8;
}

.steps li {
  margin: 6px 0;
}

.stepImage {
  margin-top: 10px;
  margin-bottom: 16px;
}

.stepImage img {
  display: block;
  max-width: 100%;
  height: auto;
  border: 1px solid #ebeef5;
  border-radius: 8px;
  box-shadow: var(--shadow-soft);
}

.card {
  flex: 1 1 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  display: flex;
  flex-direction: column;
}

.cardHeader {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.cardHeader h2 {
  margin: 0;
  font-size: 18px;
}

.cardHeader .hint {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.field {
  margin: 12px 0;
}

label {
  display: inline-block;
  margin-bottom: 6px;
  color: var(--muted);
}

input[type="text"],
select {
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid #dcdfe6;
  background: #ffffff;
  color: var(--text);
  outline: none;
}

select {
  -webkit-appearance: none;
  appearance: none;
  padding-right: 36px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath fill='%23606266' d='M5.5 7.5a1 1 0 0 1 1.4 0L10 10.6l3.1-3.1a1 1 0 1 1 1.4 1.4l-3.8 3.8a1 1 0 0 1-1.4 0L5.5 8.9a1 1 0 0 1 0-1.4z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 14px 14px;
}

input[type="text"]::placeholder {
  color: #a8abb2;
}

input[type="text"]:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(64, 158, 255, 0.18);
}

.actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 12px;
}

button {
  border: 1px solid var(--accent);
  background: #ffffff;
  font-size: 14px;
  color: var(--accent);
  padding: 6px 10px;
  margin-top: 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(64, 158, 255, 0.15);
  transition: all 0.2s;
}

button:hover {
  background: #ecf5ff;
  border-color: #66b1ff;
  color: #409eff;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  box-shadow: none;
}

.message {
  margin: 10px 0 0;
  min-height: 20px;
  color: var(--muted);
}

.message.error { color: var(--danger); }
.message.ok { color: var(--ok); }

#dropZone {
  border: 2px dashed var(--border-strong);
  background: #ffffff;
  border-radius: var(--radius-sm);
  padding: 18px;
  text-align: center;
  cursor: pointer;
  user-select: none;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

#dropZone p {
  margin: 0;
  color: var(--muted);
}

#dropZone.dragover {
  border-color: var(--accent);
  background: rgba(64, 158, 255, 0.06);
}

#fileInput { display: none; }

.cardFooter {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px dashed var(--border);
}

.cardFooter h3 {
  font-size: 14px;
  margin: 0 0 8px 0;
  color: var(--text);
}

.cardFooter ol {
  margin-right: 10px;
  padding-left: 24px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.cardFooter li {
  margin-bottom: 4px;
}

@media (max-width: 900px) {
  .row {
    flex-direction: column;
  }
}