/* ========================================
   条形码生成器 - WinXP 蓝色经典风格
   ======================================== */

/* --- 基础重置 --- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --xp-blue: #0054E6;
  --xp-blue-dark: #0040A8;
  --xp-blue-light: #3B7BE9;
  --xp-blue-hover: #0066FF;
  --xp-title-grad-start: #0054E6;
  --xp-title-grad-end: #003CA8;
  --xp-silver: #ECE9D8;
  --xp-silver-dark: #D4D0C8;
  --xp-silver-light: #F5F4EA;
  --xp-panel: #FFFFFF;
  --xp-border-out: #A0A0A0;
  --xp-border-in: #FFFFFF;
  --xp-text: #000000;
  --xp-text-secondary: #404040;
  --xp-green: #228B22;
  --xp-red: #CC0000;
  --xp-font: "Tahoma", "Segoe UI", "Microsoft YaHei", -apple-system, sans-serif;
}

html {
  scroll-padding-top: 60px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--xp-font);
  background: var(--xp-silver);
  color: var(--xp-text);
  line-height: 1.6;
  font-size: 15px;
}

/* --- Header --- */
.site-header {
  background: linear-gradient(to bottom, #FFFFFF, #E8E8E8);
  border-bottom: none;
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

.site-header-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 16px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--xp-blue-dark);
  font-size: 17px;
  font-weight: bold;
  text-shadow: none;
}

.site-logo svg {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

.site-logo-img {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

.site-nav {
  display: flex;
  gap: 2px;
}

.site-nav a {
  color: #333333;
  text-decoration: none;
  padding: 6px 14px;
  font-size: 14px;
  border-radius: 3px 3px 0 0;
  transition: background 0.15s;
  text-shadow: none;
}

.site-nav a:hover {
  background: rgba(0, 84, 230, 0.1);
  color: var(--xp-blue-dark);
}

.site-nav a.active {
  background: var(--xp-blue);
  color: #FFFFFF;
  text-shadow: 1px 1px 1px rgba(0, 0, 0, 0.2);
}

/* --- Main Layout --- */
.main-wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px;
}

/* --- WinXP Window Panel --- */
.xp-window {
  background: var(--xp-panel);
  border: 1px solid var(--xp-blue-dark);
  border-radius: 6px 6px 0 0;
  margin-bottom: 16px;
  box-shadow: 2px 2px 8px rgba(0, 0, 0, 0.15);
  overflow: hidden;
}

.xp-window-title {
  background: linear-gradient(to right, var(--xp-title-grad-start), var(--xp-title-grad-end));
  color: #FFFFFF;
  font-weight: bold;
  font-size: 15px;
  padding: 6px 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.xp-window-title .title-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.xp-window-body {
  padding: 16px;
}

/* --- Page Title --- */
.page-title-section {
  margin-bottom: 16px;
}

.page-title-section h1 {
  font-size: 26px;
  color: var(--xp-blue-dark);
  margin-bottom: 6px;
  text-align: center;
}

.page-title-section .subtitle {
  font-size: 15px;
  color: var(--xp-text-secondary);
  line-height: 1.7;
}

/* --- Tool Layout (Grid) --- */
.tool-grid {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

@media (max-width: 900px) {
  .tool-grid {
    grid-template-columns: 1fr;
  }
}

/* --- Form Controls (WinXP Style) --- */
.form-group {
  margin-bottom: 14px;
}

.form-label {
  display: block;
  font-size: 14px;
  font-weight: bold;
  color: var(--xp-text);
  margin-bottom: 5px;
}

.xp-input,
.xp-select,
.xp-textarea {
  width: 100%;
  padding: 5px 8px;
  border: 1px solid #7F9DB9;
  background: #FFFFFF;
  font-size: 14px;
  font-family: var(--xp-font);
  outline: none;
  border-radius: 2px;
}

.xp-input:focus,
.xp-select:focus,
.xp-textarea:focus {
  border-color: var(--xp-blue);
  box-shadow: 0 0 0 1px var(--xp-blue-light);
}

.xp-select {
  cursor: pointer;
  appearance: auto;
}

.xp-textarea {
  resize: vertical;
  min-height: 120px;
}

.xp-number {
  width: 100%;
  padding: 5px 8px;
  border: 1px solid #7F9DB9;
  background: #FFFFFF;
  font-size: 14px;
  font-family: var(--xp-font);
  outline: none;
  border-radius: 2px;
}

/* --- WinXP Button --- */
.xp-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 5px 16px;
  font-size: 14px;
  font-family: var(--xp-font);
  font-weight: bold;
  border: 1px solid #003C74;
  border-radius: 3px;
  background: linear-gradient(to bottom, #F5F5F5, #E4E4E4);
  color: var(--xp-text);
  cursor: pointer;
  transition: all 0.1s;
  text-decoration: none;
  line-height: 1.4;
}

.xp-btn:hover {
  background: linear-gradient(to bottom, #FFFFFF, #E8E8E8);
  border-color: var(--xp-blue);
}

.xp-btn:active {
  background: linear-gradient(to bottom, #E4E4E4, #D4D4D4);
  border-color: #003C74;
}

.xp-btn-primary {
  background: linear-gradient(to bottom, var(--xp-blue-light), var(--xp-blue), var(--xp-blue-dark));
  color: #FFFFFF;
  border: 1px solid #003C74;
  text-shadow: 1px 1px 1px rgba(0, 0, 0, 0.3);
}

.xp-btn-primary:hover {
  background: linear-gradient(to bottom, #4A8BF5, var(--xp-blue-hover), var(--xp-blue));
}

.xp-btn-primary:active {
  background: linear-gradient(to bottom, var(--xp-blue), var(--xp-blue-dark));
}

.xp-btn-sm {
  padding: 3px 10px;
  font-size: 13px;
}

/* --- Mode Toggle --- */
.mode-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  background: var(--xp-silver-dark);
  border: 1px solid #A0A0A0;
  border-radius: 3px;
  padding: 2px;
}

.mode-toggle-btn {
  padding: 6px 12px;
  font-size: 14px;
  font-weight: bold;
  border: 1px solid transparent;
  border-radius: 2px;
  background: transparent;
  color: var(--xp-text-secondary);
  cursor: pointer;
  transition: all 0.1s;
  text-align: center;
}

.mode-toggle-btn.active {
  background: #FFFFFF;
  border: 1px solid #A0A0A0;
  color: var(--xp-blue-dark);
  box-shadow: inset 0 1px 0 #FFFFFF;
}

/* --- Form Row --- */
.form-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

/* --- Advanced Panel --- */
.advanced-panel-wrap {
  border: 1px solid var(--xp-silver-dark);
  border-radius: 3px;
  background: var(--xp-silver-light);
  padding: 0;
}

.advanced-toggle-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background: linear-gradient(to bottom, #F5F5F5, #E4E4E4);
  border: none;
  border-bottom: 1px solid var(--xp-silver-dark);
  font-size: 14px;
  font-weight: bold;
  cursor: pointer;
  color: var(--xp-text);
}

.advanced-toggle-btn:hover {
  background: linear-gradient(to bottom, #FFFFFF, #E8E8E8);
}

.advanced-panel {
  padding: 14px;
  display: none;
}

.advanced-panel.open {
  display: block;
}

/* --- Color Input --- */
.xp-color-input {
  width: 100%;
  height: 36px;
  padding: 3px;
  border: 1px solid #7F9DB9;
  border-radius: 2px;
  background: #FFFFFF;
  cursor: pointer;
}

/* --- Checkbox Row --- */
.checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 36px;
  border: 1px solid #7F9DB9;
  border-radius: 2px;
  padding: 0 10px;
  background: #FFFFFF;
  cursor: pointer;
}

.checkbox-row input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--xp-blue);
}

.checkbox-row span {
  font-size: 14px;
  color: var(--xp-text);
}

/* --- Button Bar --- */
.btn-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 4px;
}

/* --- Preview Area --- */
.preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.preview-label {
  font-size: 14px;
  font-weight: bold;
  color: var(--xp-text);
}

.preview-status {
  font-size: 13px;
  color: var(--xp-text-secondary);
}

.preview-canvas-wrap {
  display: flex;
  min-height: 220px;
  align-items: center;
  justify-content: center;
  border: 2px dashed #A0A0A0;
  border-radius: 3px;
  background: #FFFFFF;
  padding: 12px;
}

@media (min-width: 600px) {
  .preview-canvas-wrap {
    min-height: 280px;
    padding: 20px;
  }
}

.preview-canvas-wrap canvas {
  max-width: 100%;
}

.batch-preview-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

@media (min-width: 600px) {
  .batch-preview-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.batch-item {
  border: 1px solid var(--xp-silver-dark);
  border-radius: 3px;
  background: #FFFFFF;
  padding: 12px;
}

.batch-item-title {
  font-size: 13px;
  color: var(--xp-text-secondary);
  margin-bottom: 8px;
}

.batch-item-canvas-wrap {
  display: flex;
  min-height: 140px;
  align-items: center;
  justify-content: center;
  border: 2px dashed #A0A0A0;
  border-radius: 2px;
  padding: 8px;
}

.batch-item-canvas-wrap canvas {
  max-width: 100%;
}

.batch-item-error {
  font-size: 13px;
  color: var(--xp-red);
}

.batch-item-download {
  margin-top: 8px;
}

/* --- Error Message --- */
.error-box {
  margin-top: 12px;
  padding: 8px 12px;
  border: 1px solid #CC0000;
  border-radius: 3px;
  background: #FFF0F0;
  color: var(--xp-red);
  font-size: 14px;
  display: none;
}

.error-box.show {
  display: block;
}

/* --- Hint Text --- */
.hint-text {
  font-size: 13px;
  color: var(--xp-text-secondary);
  margin-top: 5px;
}

/* --- Utility --- */
.hidden {
  display: none !important;
}

/* --- Content Sections --- */
.content-section {
  margin-bottom: 16px;
}

.content-section-body {
  padding: 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--xp-text);
}

.content-section-body p {
  margin-bottom: 12px;
}

.content-section-body h3 {
  font-size: 16px;
  color: var(--xp-blue-dark);
  margin-top: 16px;
  margin-bottom: 8px;
  border-left: 3px solid var(--xp-blue);
  padding-left: 8px;
}

/* --- Feature Cards --- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  padding: 16px;
}

@media (max-width: 700px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }
}

.feature-card {
  border: 1px solid var(--xp-silver-dark);
  border-radius: 4px;
  background: var(--xp-silver-light);
  padding: 14px;
  transition: box-shadow 0.2s;
}

.feature-card:hover {
  box-shadow: 2px 2px 8px rgba(0, 84, 230, 0.15);
  border-color: var(--xp-blue-light);
}

.feature-card-icon {
  font-size: 26px;
  margin-bottom: 8px;
}

.feature-card-title {
  font-size: 15px;
  font-weight: bold;
  color: var(--xp-blue-dark);
  margin-bottom: 6px;
}

.feature-card-desc {
  font-size: 14px;
  color: var(--xp-text-secondary);
  line-height: 1.6;
}

/* --- Tech Principle --- */
.tech-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding: 16px;
}

@media (max-width: 700px) {
  .tech-grid {
    grid-template-columns: 1fr;
  }
}

.tech-item {
  border: 1px solid var(--xp-silver-dark);
  border-radius: 4px;
  padding: 14px;
  background: #FFFFFF;
}

.tech-item-name {
  font-size: 15px;
  font-weight: bold;
  color: var(--xp-blue-dark);
  margin-bottom: 6px;
}

.tech-item-desc {
  font-size: 14px;
  color: var(--xp-text-secondary);
  line-height: 1.7;
}

.tech-item-spec {
  font-size: 13px;
  color: var(--xp-text-secondary);
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px dotted var(--xp-silver-dark);
}

/* --- FAQ --- */
.faq-list {
  padding: 16px;
}

.faq-item {
  border-bottom: 1px solid var(--xp-silver-dark);
  padding: 10px 0;
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-question {
  font-size: 15px;
  font-weight: bold;
  color: var(--xp-blue-dark);
  cursor: pointer;
  padding: 6px 0;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  user-select: none;
}

.faq-question::before {
  content: "Q";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  background: var(--xp-blue);
  color: #FFFFFF;
  border-radius: 3px;
  font-size: 13px;
  font-weight: bold;
  flex-shrink: 0;
}

.faq-answer {
  font-size: 14px;
  color: var(--xp-text-secondary);
  line-height: 1.8;
  padding: 6px 0 6px 28px;
  display: none;
}

.faq-item.open .faq-answer {
  display: block;
}

.faq-item.open .faq-question::before {
  content: "A";
  background: var(--xp-green);
}

/* --- Barcode Type Table --- */
.type-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
  font-size: 14px;
}

.type-table th {
  background: linear-gradient(to bottom, var(--xp-blue-light), var(--xp-blue-dark));
  color: #FFFFFF;
  padding: 8px 12px;
  text-align: left;
  font-weight: bold;
  text-shadow: 1px 1px 1px rgba(0, 0, 0, 0.2);
}

.type-table td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--xp-silver-dark);
}

.type-table tr:nth-child(even) {
  background: var(--xp-silver-light);
}

.type-table tr:hover {
  background: #E0EDFF;
}

/* --- Footer --- */
.site-footer {
  background: linear-gradient(to bottom, var(--xp-blue), var(--xp-blue-dark));
  color: #FFFFFF;
  padding: 24px 16px;
  margin-top: 24px;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.site-footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  text-align: center;
}

.footer-links {
  margin-bottom: 12px;
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-links a {
  color: #FFFFFF;
  text-decoration: none;
  font-size: 14px;
  transition: color 0.15s;
}

.footer-links a:hover {
  color: #BFD8FF;
  text-decoration: underline;
}

.footer-copy {
  font-size: 13px;
  color: #BFD8FF;
}

/* --- SEO Content Section --- */
.seo-content {
  padding: 16px;
}

.seo-content h2 {
  font-size: 20px;
  color: var(--xp-blue-dark);
  margin-bottom: 12px;
}

.seo-content h3 {
  font-size: 16px;
  color: var(--xp-blue-dark);
  margin-top: 16px;
  margin-bottom: 8px;
}

.seo-content p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--xp-text);
  margin-bottom: 10px;
}

.seo-content ul {
  margin: 8px 0 12px 20px;
}

.seo-content li {
  font-size: 14px;
  line-height: 1.8;
  color: var(--xp-text-secondary);
}

/* --- Hamburger Menu --- */
.hamburger-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: rgba(0, 84, 230, 0.1);
  border: 1px solid #CCCCCC;
  border-radius: 4px;
  cursor: pointer;
  padding: 7px;
  transition: background 0.15s;
}

.hamburger-btn:hover {
  background: rgba(0, 84, 230, 0.18);
}

.hamburger-line {
  display: block;
  width: 100%;
  height: 3px;
  background: var(--xp-blue-dark);
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.25s;
}

.hamburger-btn.active .hamburger-line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.hamburger-btn.active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.hamburger-btn.active .hamburger-line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* --- Responsive --- */
@media (max-width: 600px) {
  .site-header {
    position: sticky;
  }
  .hamburger-btn {
    display: flex;
  }
  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: linear-gradient(to bottom, #FFFFFF, #E8E8E8);
    padding: 8px;
    border-bottom: none;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
    gap: 2px;
    z-index: 999;
  }
  .site-nav.open {
    display: flex;
  }
  .site-nav a {
    padding: 10px 16px;
    border-radius: 3px;
    font-size: 15px;
  }
  .site-nav a:hover,
  .site-nav a.active {
    background: rgba(0, 84, 230, 0.12);
    color: var(--xp-blue-dark);
    text-shadow: none;
  }
  .main-wrap {
    padding: 10px;
  }
  .page-title-section h1 {
    font-size: 22px;
  }
  .form-row-2 {
    grid-template-columns: 1fr;
  }
}