/* ==========================================================================
   Clash 选用指南 (clash-zhinan.blog) - 核心样式表
   视觉方案：浅灰白书页底、藏蓝标题、铜色少量分隔标记
   ========================================================================== */

:root {
  --bg-page: #fbfbfd;
  --bg-surface: #ffffff;
  --bg-muted: #f4f5f8;
  --bg-card: #ffffff;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --navy-dark: #0f1c36;
  --navy-brand: #162a52;
  --navy-light: #243c72;
  --copper-accent: #c27803;
  --copper-hover: #a16207;
  --copper-light: #fef3c7;
  --border-light: #e2e8f0;
  --border-subtle: #edf2f7;
  --shadow-sm: 0 1px 3px rgba(15, 28, 54, 0.05);
  --shadow-md: 0 4px 12px rgba(15, 28, 54, 0.07);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --font-serif: "Songti SC", "Source Han Serif SC", STSong, "Noto Serif SC", Georgia, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--bg-page);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.8;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

a {
  color: var(--navy-brand);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease;
}

a:hover {
  color: var(--copper-accent);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.site-header {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 1px 4px rgba(15, 28, 54, 0.03);
}

.header-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.25rem;
  height: 4.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(15, 28, 54, 0.15);
}

.brand-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--navy-dark);
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.brand-badge {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.15rem 0.45rem;
  background: var(--copper-light);
  color: var(--copper-accent);
  border-radius: 4px;
  letter-spacing: 0;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 1.5rem;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-main);
  padding: 0.5rem 0.2rem;
  position: relative;
}

.nav-link:hover, .nav-link.active {
  color: var(--copper-accent);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: -0.3rem;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--copper-accent);
  border-radius: 2px;
}

/* Header Right: Search & Mobile Menu Button */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.header-search {
  position: relative;
  width: 220px;
}

.search-input {
  width: 100%;
  padding: 0.45rem 2rem 0.45rem 0.85rem;
  font-size: 0.85rem;
  border: 1px solid var(--border-light);
  border-radius: 20px;
  background: var(--bg-muted);
  color: var(--text-main);
  outline: none;
  transition: all 0.2s ease;
}

.search-input:focus {
  background: #ffffff;
  border-color: var(--copper-accent);
  box-shadow: 0 0 0 3px rgba(194, 120, 3, 0.12);
  width: 250px;
}

.search-icon-btn {
  position: absolute;
  right: 0.5rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--navy-dark);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.4rem;
}

/* ==========================================================================
   Search Modal / Results Overlay
   ========================================================================== */

.search-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 28, 54, 0.55);
  backdrop-filter: blur(4px);
  z-index: 2000;
  align-items: flex-start;
  justify-content: center;
  padding: 4rem 1rem 2rem;
}

.search-modal.active {
  display: flex;
}

.search-modal-box {
  background: var(--bg-surface);
  width: 100%;
  max-width: 640px;
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-light);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  max-height: 80vh;
}

.search-modal-header {
  display: flex;
  align-items: center;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-light);
  background: var(--bg-muted);
  gap: 0.75rem;
}

.search-modal-input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 1.05rem;
  color: var(--navy-dark);
  outline: none;
}

.search-modal-close {
  background: none;
  border: none;
  font-size: 1.25rem;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.25rem;
  border-radius: 4px;
}

.search-modal-close:hover {
  color: var(--navy-dark);
}

.search-results-list {
  padding: 0.75rem 1rem;
  overflow-y: auto;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.search-result-item a {
  display: block;
  padding: 0.75rem 0.9rem;
  border-radius: var(--radius-sm);
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  transition: all 0.15s ease;
}

.search-result-item a:hover {
  background: var(--copper-light);
  border-color: var(--copper-accent);
}

.result-title {
  font-weight: 600;
  color: var(--navy-dark);
  margin-bottom: 0.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.result-tag {
  font-size: 0.72rem;
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  background: var(--border-light);
  color: var(--navy-light);
}

.result-snippet {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.search-empty {
  padding: 2rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ==========================================================================
   Page Layout & Typography
   ========================================================================== */

.main-container,
.page-wrapper {
  max-width: 1240px;
  width: 100%;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
  flex: 1;
}

.breadcrumb-nav,
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  white-space: nowrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.breadcrumb-nav a,
.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
  white-space: nowrap;
}

.breadcrumb-nav a:hover,
.breadcrumb a:hover {
  color: var(--copper-accent);
}

.breadcrumb-separator {
  margin: 0 0.4rem;
  color: var(--text-light);
  white-space: nowrap;
}

.breadcrumb ol {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  white-space: nowrap;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--text-light);
}

.editorial-layout,
.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 320px);
  gap: 3rem;
  align-items: start;
}

@media (max-width: 992px) {
  .editorial-layout,
  .content-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

.reading-col,
.reading-column {
  min-width: 0;
  width: 100%;
}

.side-notes-col,
.sidebar-column {
  position: sticky;
  top: 5.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  min-width: 0;
}

.editorial-single-col {
  max-width: 860px;
  margin: 0 auto;
}

/* Headings */
h1.page-title {
  font-size: 2.25rem;
  line-height: 1.35;
  color: var(--navy-dark);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--navy-brand);
}

h2.section-title {
  font-size: 1.5rem;
  line-height: 1.4;
  color: var(--navy-dark);
  font-weight: 700;
  margin: 2.75rem 0 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

h2.section-title::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 1.2em;
  background-color: var(--copper-accent);
  border-radius: 2px;
}

h3.subsection-title {
  font-size: 1.2rem;
  line-height: 1.4;
  color: var(--navy-brand);
  font-weight: 600;
  margin: 2rem 0 0.85rem;
}

/* Paragraphs & Lists */
p {
  margin-bottom: 1.25rem;
  color: var(--text-main);
  font-size: 1.02rem;
}

.lead-paragraph {
  font-size: 1.12rem;
  line-height: 1.85;
  color: var(--navy-brand);
  background: var(--bg-surface);
  padding: 1.25rem 1.5rem;
  border-left: 4px solid var(--copper-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  box-shadow: var(--shadow-sm);
  margin-bottom: 2rem;
}

.reading-meta-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.75rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px dashed var(--border-light);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.meta-badge {
  background: var(--border-light);
  color: var(--navy-dark);
  font-size: 0.75rem;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-weight: 600;
}

/* Box & Cards */
.info-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-sm);
}

.info-box-header {
  font-weight: 700;
  color: var(--navy-dark);
  margin-bottom: 0.75rem;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.audience-list, .check-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.audience-list li, .check-list li {
  position: relative;
  padding-left: 1.5rem;
  font-size: 0.98rem;
}

.audience-list li::before {
  content: "✔";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--copper-accent);
  font-weight: bold;
}

.check-list li::before {
  content: "◆";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--navy-brand);
  font-size: 0.75rem;
}

/* Table of Contents */
.toc-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin: 1.75rem 0 2.5rem;
}

.toc-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--navy-dark);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.toc-list {
  list-style: none;
  columns: 2;
  column-gap: 2rem;
}

.toc-list li {
  margin-bottom: 0.45rem;
  break-inside: avoid;
}

.toc-list a {
  font-size: 0.9rem;
  color: var(--text-main);
}

.toc-list a:hover {
  color: var(--copper-accent);
  text-decoration: underline;
}

/* ==========================================================================
   Desktop Side Notes & Aside Column
   ========================================================================== */

.side-notes-col {
  position: sticky;
  top: 5.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.side-note-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  font-size: 0.88rem;
  line-height: 1.6;
}

.side-note-title {
  font-weight: 700;
  color: var(--navy-dark);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
}

.side-note-content {
  color: var(--text-muted);
}

/* Inline side note on mobile */
.inline-note {
  background: var(--bg-muted);
  border-left: 3px solid var(--navy-brand);
  padding: 0.85rem 1rem;
  margin: 1.25rem 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Airport Cards & Evaluation Blocks (/airport-recommend/)
   ========================================================================== */

.airport-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 2.75rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
  position: relative;
}

.airport-card:hover {
  border-color: var(--navy-light);
  box-shadow: var(--shadow-md);
}

.airport-card.is-self {
  border: 2px solid var(--copper-accent);
  background: linear-gradient(180deg, #fffdf7 0%, #ffffff 100%);
  box-shadow: 0 4px 20px rgba(194, 120, 3, 0.12);
}

.self-flag-banner {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--copper-accent);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  letter-spacing: 0.04em;
  margin-bottom: 0.75rem;
  box-shadow: 0 2px 4px rgba(194, 120, 3, 0.2);
}

.featured-recommend-box {
  background: #ffffff;
  border: 2px solid var(--copper-accent);
  border-radius: 12px;
  padding: 1.75rem 2rem;
  margin: 2rem 0 2.5rem;
  box-shadow: 0 6px 24px rgba(194, 120, 3, 0.12);
  position: relative;
  overflow: hidden;
}

.featured-recommend-box::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--copper-accent) 0%, #f59e0b 100%);
}

.featured-recommend-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--navy-dark);
}

.featured-promo-grid-card {
  background: #ffffff;
  border: 2px solid var(--copper-accent);
  border-radius: 12px;
  padding: 1.75rem 2rem;
  margin: 2rem 0 2.5rem;
  box-shadow: 0 6px 24px rgba(194, 120, 3, 0.12);
  position: relative;
  overflow: hidden;
}

.featured-promo-grid-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--copper-accent) 0%, #f59e0b 100%);
}

.featured-promo-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: #fef3c7;
  color: #92400e;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.25rem 0.65rem;
  border-radius: 20px;
  border: 1px solid #fde68a;
}

.promo-coupon-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: nowrap;
  gap: 1rem;
  background: #fffdfa;
  border: 1.5px dashed var(--copper-accent);
  border-radius: 8px;
  padding: 0.65rem 1rem;
  margin: 0.85rem 0 1.25rem;
  width: 100%;
  box-sizing: border-box;
}

@media (max-width: 820px) {
  .promo-coupon-container {
    flex-wrap: wrap;
    gap: 0.85rem;
  }
}

.promo-coupon-code {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--copper-accent);
  letter-spacing: 0.05em;
}

.btn-promo-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--copper-accent);
  color: #ffffff !important;
  font-size: 0.95rem;
  font-weight: 700;
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius-sm);
  text-decoration: none !important;
  box-shadow: 0 3px 10px rgba(194, 120, 3, 0.25);
  transition: all 0.2s ease;
}

.btn-promo-cta:hover {
  background: var(--copper-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(194, 120, 3, 0.35);
}

.airport-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 1rem;
}

.airport-title-group {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.airport-name-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.airport-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--navy-dark);
  margin: 0;
}

.badge-tag {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.15rem 0.55rem;
  border-radius: 4px;
  background: var(--bg-muted);
  color: var(--navy-light);
  border: 1px solid var(--border-light);
}

.badge-tag.tag-orange {
  background: var(--copper-light);
  color: var(--copper-accent);
  border-color: #fde68a;
}

.badge-tag.tag-blue {
  background: #eff6ff;
  color: #1e40af;
  border-color: #dbeafe;
}

.airport-price-highlight {
  text-align: right;
  flex-shrink: 0;
}

.price-number {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--copper-accent);
}

.price-cycle {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* Specs Grid */
.specs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem;
  margin: 1.25rem 0;
  background: var(--bg-muted);
  padding: 1rem;
  border-radius: var(--radius-md);
}

.spec-item {
  display: flex;
  flex-direction: column;
}

.spec-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
}

.spec-value {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--navy-dark);
  margin-top: 0.15rem;
}

/* Editorial Judgment Box */
.judgment-box {
  background: #ffffff;
  border-left: 3px solid var(--navy-brand);
  padding: 1rem 1.25rem;
  margin: 1.25rem 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  box-shadow: inset 0 0 0 1px var(--border-subtle);
}

.judgment-header {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--navy-dark);
  margin-bottom: 0.4rem;
}

.judgment-text {
  font-size: 0.95rem;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.judgment-reservation {
  font-size: 0.85rem;
  color: #b45309;
}

/* Packages Table */
.package-table-wrapper {
  overflow-x: auto;
  margin: 1.25rem 0;
}

.package-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.package-table th {
  background: var(--navy-dark);
  color: #ffffff;
  font-weight: 600;
  text-align: left;
  padding: 0.6rem 0.85rem;
}

.package-table td {
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-main);
}

.package-table tr:nth-child(even) td {
  background: var(--bg-muted);
}

/* Coupon & Action Box */
.card-action-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px dashed var(--border-light);
}

.coupon-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-muted);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
}

.coupon-code-text {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--navy-dark);
  font-size: 0.95rem;
  letter-spacing: 0.05em;
}

.btn-copy {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  color: var(--text-main);
  padding: 0.25rem 0.6rem;
  font-size: 0.78rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-copy:hover {
  background: var(--copper-light);
  border-color: var(--copper-accent);
  color: var(--copper-accent);
}

.coupon-status {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.btn-affiliate {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  background: var(--copper-accent);
  color: #ffffff;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius-sm);
  transition: background 0.2s ease, transform 0.1s ease;
  box-shadow: 0 2px 5px rgba(194, 120, 3, 0.25);
}

.btn-affiliate:hover {
  background: var(--copper-hover);
  color: #ffffff;
  transform: translateY(-1px);
}

.card-disclaimer {
  margin-top: 0.85rem;
  font-size: 0.78rem;
  color: var(--text-light);
  line-height: 1.5;
}

/* ==========================================================================
   Home Chapter Entry Cards (错开整行大入口)
   ========================================================================== */

.chapter-entries {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin: 3rem 0;
}

.chapter-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  box-shadow: var(--shadow-sm);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 2rem;
  align-items: center;
  transition: all 0.2s ease;
}

.chapter-card:hover {
  border-color: var(--copper-accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.chapter-card.airport-entry {
  border-left: 6px solid var(--copper-accent);
  background: linear-gradient(to right, #fffdf8, #ffffff);
}

.chapter-card.client-entry {
  border-left: 6px solid var(--navy-brand);
  background: linear-gradient(to right, #f8faff, #ffffff);
}

.chapter-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.chapter-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--navy-dark);
  margin-bottom: 0.75rem;
}

.chapter-desc {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 0;
}

.chapter-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 1rem;
  white-space: nowrap;
}

.btn-primary {
  background: var(--copper-accent);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--copper-hover);
  color: #ffffff;
}

.btn-secondary {
  background: var(--navy-brand);
  color: #ffffff;
}

.btn-secondary:hover {
  background: var(--navy-dark);
  color: #ffffff;
}

/* ==========================================================================
   FAQ Accordions & Q&A Blocks
   ========================================================================== */

.faq-section-group {
  margin-bottom: 2.5rem;
}

.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow-sm);
}

.faq-question {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--navy-dark);
  margin-bottom: 0.6rem;
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.faq-q-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  background: var(--navy-brand);
  color: #ffffff;
  border-radius: 4px;
  font-size: 0.75rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.faq-answer {
  color: var(--text-main);
  font-size: 0.98rem;
  line-height: 1.8;
  margin-bottom: 0;
  padding-left: 2rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  background: var(--navy-dark);
  color: #cbd5e1;
  padding: 3.5rem 1.25rem 2rem;
  margin-top: auto;
  border-top: 3px solid var(--copper-accent);
}

.footer-container {
  max-width: 1240px;
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 2.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand-title {
  color: #ffffff;
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.footer-desc {
  font-size: 0.9rem;
  line-height: 1.7;
  color: #94a3b8;
  max-width: 440px;
}

.footer-nav-title {
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-links a {
  color: #cbd5e1;
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--copper-accent);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 0.82rem;
  color: #64748b;
}

.footer-disclaimer-text {
  max-width: 800px;
  line-height: 1.6;
}

/* ==========================================================================
   Responsive Adaptations (< 960px & < 640px)
   ========================================================================== */

@media (max-width: 960px) {
  .editorial-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .side-notes-col {
    position: static;
    margin-top: 2rem;
  }

  .chapter-card {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .toc-list {
    columns: 1;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .header-container {
    height: 3.75rem;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 3.75rem;
    left: 0;
    right: 0;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-light);
    flex-direction: column;
    padding: 1rem 1.5rem;
    gap: 1rem;
    box-shadow: var(--shadow-md);
  }

  .nav-menu.is-open {
    display: flex;
  }

  .mobile-menu-toggle {
    display: block;
  }

  .header-search {
    width: 150px;
  }

  .header-search:focus-within {
    width: 170px;
  }

  h1.page-title {
    font-size: 1.75rem;
  }

  .airport-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .airport-price-highlight {
    text-align: left;
  }

  .card-action-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-affiliate {
    width: 100%;
  }
}

/* ==========================================================================
   全球云 主推增强样式 (Conversion & Promo Enhancements)
   ========================================================================== */

.btn-header-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--copper-accent);
  color: #ffffff !important;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 0.35rem 0.85rem;
  border-radius: 20px;
  white-space: nowrap;
  transition: all 0.2s ease;
  box-shadow: 0 2px 6px rgba(194, 120, 3, 0.25);
}

.btn-header-cta:hover {
  background: var(--copper-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(194, 120, 3, 0.35);
}

.sticky-promo-card {
  background: linear-gradient(135deg, #fffcf5 0%, #fff7eb 100%);
  border: 1.5px solid var(--copper-accent);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: 0 4px 12px rgba(194, 120, 3, 0.12);
  margin-bottom: 1.5rem;
}

.sticky-promo-title {
  font-size: 1rem;
  font-weight: 800;
  color: var(--navy-dark);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.4rem;
}

.sticky-promo-desc {
  font-size: 0.84rem;
  color: var(--text-main);
  line-height: 1.55;
  margin-bottom: 0.75rem;
}

.sticky-promo-coupon {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #ffffff;
  border: 1px dashed var(--copper-accent);
  border-radius: 4px;
  padding: 0.3rem 0.5rem;
  margin-bottom: 0.75rem;
  font-size: 0.82rem;
}

.btn-sticky-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  background: var(--copper-accent);
  color: #ffffff !important;
  font-weight: 700;
  font-size: 0.88rem;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  transition: background 0.2s ease;
  text-align: center;
}

.btn-sticky-cta:hover {
  background: var(--copper-hover);
}

@media (max-width: 640px) {
  .btn-header-cta {
    display: none;
  }
}

/* ==========================================================================
   Ermao & Tizilab 风格文章式排版样式 (Editorial Article Layout)
   ========================================================================== */

.airport-article-section {
  background: #ffffff;
  border: 1.5px solid #E2E8F0;
  border-radius: 14px;
  padding: 2.5rem 2.5rem 2.25rem;
  margin-bottom: 3.5rem;
  box-shadow: 0 4px 20px rgba(15, 28, 54, 0.05);
  transition: all 0.25s ease;
  position: relative;
}

.airport-article-section:hover {
  border-color: #CBD5E1;
  box-shadow: 0 8px 28px rgba(15, 28, 54, 0.09);
}

.airport-article-section.is-featured-self {
  border: 2.5px solid var(--copper-accent);
  background: linear-gradient(180deg, #fffdf9 0%, #ffffff 100%);
  box-shadow: 0 8px 30px rgba(194, 120, 3, 0.14);
}

.article-section-header {
  border-bottom: 2px solid var(--border-subtle);
  padding-bottom: 1.25rem;
  margin-bottom: 1.75rem;
}

.article-section-header.is-self-header {
  border-bottom-color: var(--copper-light);
}

.article-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.article-main-title {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--navy-dark);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.article-meta-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.65rem;
}

.article-sub-heading {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--navy-brand);
  margin: 1.75rem 0 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px dashed #E2E8F0;
}

.article-sub-heading::before {
  content: "§";
  color: var(--copper-accent);
  font-weight: 900;
}

.article-section-divider {
  border: 0;
  height: 2px;
  background: repeating-linear-gradient(90deg, #E2E8F0, #E2E8F0 6px, transparent 6px, transparent 12px);
  margin: 3.5rem 0;
}

.section-boundary-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin: 3.5rem 0;
  color: var(--copper-accent);
  opacity: 0.85;
}

.boundary-line {
  flex: 1;
  height: 1.5px;
  background: linear-gradient(90deg, transparent, #CBD5E1, transparent);
}

.boundary-icon {
  font-size: 0.85rem;
  color: var(--copper-accent);
}

.self-hero-ribbon {
  display: block;
  background: linear-gradient(90deg, var(--copper-accent) 0%, #d97706 100%);
  color: #ffffff !important;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.45rem 1rem;
  border-radius: 6px;
  margin-bottom: 1.25rem;
  letter-spacing: 0.02em;
}

.scheme-index-badge {
  display: inline-block;
  background: var(--navy-dark);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
}

/* ==========================================================================
   翻墙工具与多平台客户端专属样式 (Tools Page Styles)
   ========================================================================== */

.tools-platform-nav {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin: 1.5rem 0 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-subtle);
}

.tools-platform-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 20px;
  background: var(--bg-muted);
  color: var(--text-main);
  border: 1px solid var(--border-light);
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none !important;
}

.tools-platform-btn:hover,
.tools-platform-btn.active {
  background: var(--navy-dark);
  color: #ffffff !important;
  border-color: var(--navy-dark);
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
  margin: 1.5rem 0 2.5rem;
}

.tool-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: 12px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 0 2px 10px rgba(15, 28, 54, 0.04);
  transition: all 0.2s ease;
}

.tool-card:hover {
  border-color: var(--navy-light);
  box-shadow: 0 6px 18px rgba(15, 28, 54, 0.08);
  transform: translateY(-2px);
}

.tool-card.is-featured {
  border: 1.5px solid var(--copper-accent);
  background: linear-gradient(180deg, #fffcf7 0%, #ffffff 100%);
}

.tool-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}

.tool-card-name {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--navy-dark);
  margin: 0;
}

.tool-card-badges {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
  margin-top: 0.25rem;
}

.tool-card-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 1rem;
}

.tool-card-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  font-size: 0.8rem;
  background: var(--bg-muted);
  padding: 0.65rem 0.85rem;
  border-radius: 6px;
  margin-bottom: 1rem;
}

.tool-card-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.btn-tool-dl {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  background: var(--navy-dark);
  color: #ffffff !important;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.45rem 0.85rem;
  border-radius: 6px;
  text-decoration: none !important;
  transition: all 0.2s ease;
  flex: 1;
}

.btn-tool-dl:hover {
  background: var(--navy-light);
}

.btn-tool-alt {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #ffffff;
  color: var(--text-main) !important;
  border: 1px solid var(--border-light);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.45rem 0.75rem;
  border-radius: 6px;
  text-decoration: none !important;
}

.btn-tool-alt:hover {
  background: var(--bg-muted);
}

/* 80+ 客户端完整对比数据表 */
.clients-table-container {
  overflow-x: auto;
  border: 1px solid var(--border-light);
  border-radius: 10px;
  background: #ffffff;
  margin: 1.5rem 0 3rem;
  box-shadow: 0 2px 12px rgba(15, 28, 54, 0.04);
}

.clients-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  text-align: left;
}

.clients-table th {
  background: var(--bg-muted);
  color: var(--navy-dark);
  font-weight: 700;
  padding: 0.85rem 1rem;
  border-bottom: 1.5px solid var(--border-light);
  white-space: nowrap;
}

.clients-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
  vertical-align: middle;
}

.clients-table tr:hover {
  background: #fafafc;
}

.status-badge-ok {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  color: #16a34a;
  font-size: 0.8rem;
  font-weight: 600;
}

.status-badge-ok::before {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #16a34a;
}

.status-badge-warn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  color: #d97706;
  font-size: 0.8rem;
  font-weight: 600;
}

.status-badge-warn::before {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #d97706;
}

.status-badge-stop {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  color: #94a3b8;
  font-size: 0.8rem;
  font-weight: 500;
}

.status-badge-stop::before {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #94a3b8;
}
  color: var(--copper-accent);
  font-weight: 900;
}

.pros-cons-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 1.5rem 0;
}

.pros-box {
  background: #f0fdf4;
  border-left: 3px solid #16a34a;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 1rem 1.25rem;
}

.cons-box {
  background: #fef2f2;
  border-left: 3px solid #dc2626;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 1rem 1.25rem;
}

.pros-title {
  font-weight: 700;
  color: #15803d;
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}

.cons-title {
  font-weight: 700;
  color: #b91c1c;
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}

.pros-cons-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  font-size: 0.9rem;
  color: var(--text-main);
}

.pros-cons-list li {
  position: relative;
  padding-left: 1.2rem;
  line-height: 1.55;
}

.pros-box .pros-cons-list li::before {
  content: "✔";
  position: absolute;
  left: 0;
  color: #16a34a;
  font-weight: bold;
}

.cons-box .pros-cons-list li::before {
  content: "✖";
  position: absolute;
  left: 0;
  color: #dc2626;
  font-weight: bold;
}

.article-action-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.75rem;
  padding-top: 1.25rem;
  border-top: 1px dashed var(--border-light);
}

.btn-read-review {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: #ffffff;
  color: var(--navy-brand);
  border: 1.5px solid var(--navy-brand);
  font-weight: 700;
  font-size: 0.92rem;
  padding: 0.55rem 1.25rem;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.btn-read-review:hover {
  background: var(--navy-brand);
  color: #ffffff;
  transform: translateY(-1px);
}

@media (max-width: 768px) {
  .airport-article-section {
    padding: 1.5rem 1.25rem;
  }
  .pros-cons-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .article-action-row {
    flex-direction: column;
    align-items: stretch;
  }
  .btn-read-review, .btn-affiliate {
    width: 100%;
    text-align: center;
    justify-content: center;
  }
}

/* ==========================================================================
   客户端主页、系统教程与交互组件样式 (Client Hub, Tutorials & Interactive Widgets)
   ========================================================================== */

/* 1. 系统与架构选择器 (Architecture Selector) */
.arch-selector-widget {
  background: #ffffff;
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin: 1.75rem 0 2rem;
  box-shadow: 0 4px 16px rgba(15, 28, 54, 0.05);
}

.arch-selector-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--navy-dark);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.arch-pills-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.arch-pill-btn {
  background: var(--bg-muted);
  border: 1px solid var(--border-light);
  color: var(--text-main);
  padding: 0.45rem 0.9rem;
  border-radius: 20px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.arch-pill-btn:hover {
  border-color: var(--navy-brand);
  color: var(--navy-brand);
}

.arch-pill-btn.active {
  background: var(--navy-dark);
  color: #ffffff;
  border-color: var(--navy-dark);
}

.arch-result-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-left: 4px solid var(--copper-accent);
  border-radius: 6px;
  padding: 1.15rem 1.25rem;
}

.arch-match-file {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--copper-accent);
  margin-bottom: 0.4rem;
  word-break: break-all;
}

.arch-match-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 0.85rem;
}

.arch-action-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
}

.arch-help-note {
  margin-top: 0.75rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  background: #f8fafc;
  padding: 0.5rem 0.75rem;
  border-radius: 4px;
  border: 1px dashed var(--border-light);
}

/* 2. 教程进度互动清单 (Interactive Progress Checklist) */
.tutorial-checklist-widget {
  background: #ffffff;
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin: 2rem 0;
  box-shadow: 0 4px 16px rgba(15, 28, 54, 0.04);
}

.checklist-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.checklist-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--navy-dark);
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.checklist-progress-bar-wrap {
  width: 100%;
  height: 8px;
  background: #e2e8f0;
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 1.25rem;
}

.checklist-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--copper-accent), #16a34a);
  width: 0%;
  transition: width 0.3s ease;
}

.checklist-items-grid {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.checklist-item-row {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  padding: 0.55rem 0.75rem;
  border-radius: 6px;
  background: #f8fafc;
  border: 1px solid transparent;
  transition: all 0.2s;
  cursor: pointer;
}

.checklist-item-row:hover {
  background: #f1f5f9;
  border-color: #cbd5e1;
}

.checklist-item-row.is-completed {
  background: #f0fdf4;
  border-color: #bbf7d0;
}

.checklist-item-row input[type="checkbox"] {
  width: 1.1rem;
  height: 1.1rem;
  accent-color: var(--copper-accent);
  margin-top: 0.15rem;
  cursor: pointer;
}

.checklist-item-label {
  font-size: 0.92rem;
  color: var(--text-main);
  line-height: 1.45;
  cursor: pointer;
  flex: 1;
}

.checklist-item-row.is-completed .checklist-item-label {
  color: #15803d;
  font-weight: 600;
}

/* 3. 标准教程 4 要素卡片 (Where, Action, Expected, Failure) */
.step-instruction-box {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
  margin: 1.25rem 0 1.75rem;
  box-shadow: 0 2px 8px rgba(15, 28, 54, 0.03);
}

.step-indicator-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.85rem;
  margin-top: 0.85rem;
}

.step-indicator-item {
  background: var(--bg-muted);
  border-radius: 6px;
  padding: 0.75rem 0.9rem;
  font-size: 0.88rem;
  line-height: 1.55;
}

.step-indicator-item.target-loc {
  border-left: 3px solid #3b82f6;
}

.step-indicator-item.target-act {
  border-left: 3px solid var(--copper-accent);
}

.step-indicator-item.target-res {
  border-left: 3px solid #16a34a;
}

.step-indicator-item.target-fail {
  border-left: 3px solid #ef4444;
}

.step-indicator-label {
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  margin-bottom: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.target-loc .step-indicator-label { color: #1d4ed8; }
.target-act .step-indicator-label { color: #b45309; }
.target-res .step-indicator-label { color: #15803d; }
.target-fail .step-indicator-label { color: #b91c1c; }

/* 4. 故障排查诊断向导组件 (Troubleshooting Wizard) */
.troubleshooting-wizard-card {
  background: #ffffff;
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  margin: 2rem 0;
  box-shadow: 0 4px 20px rgba(15, 28, 54, 0.06);
}

.symptom-selector-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0 1.5rem;
}

.symptom-tab-btn {
  background: #f8fafc;
  border: 1px solid var(--border-light);
  color: var(--text-main);
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  text-align: left;
}

.symptom-tab-btn:hover {
  background: #f1f5f9;
  border-color: var(--copper-accent);
}

.symptom-tab-btn.active {
  background: var(--navy-dark);
  color: #ffffff;
  border-color: var(--navy-dark);
}

.symptom-panel {
  display: none;
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: 8px;
  padding: 1.5rem;
  animation: fadeIn 0.2s ease-in-out;
}

.symptom-panel.active {
  display: block;
}

.diag-summary-box {
  background: #fef2f2;
  border-left: 4px solid #ef4444;
  padding: 0.75rem 1rem;
  border-radius: 4px;
  margin-bottom: 1.25rem;
  font-size: 0.92rem;
  color: #991b1b;
}

.diag-steps-list {
  padding-left: 1.25rem;
  line-height: 1.8;
  font-size: 0.92rem;
  margin-bottom: 1rem;
}

/* 5. 真实可用反馈组件 (Feedback Widget) */
.feedback-widget-box {
  background: #fafafc;
  border: 1.5px solid #e2e8f0;
  border-radius: 12px;
  padding: 1.75rem;
  margin: 2.5rem 0 1.5rem;
}

.feedback-widget-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--navy-dark);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.feedback-form {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-top: 1rem;
}

.feedback-row {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.feedback-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--navy-dark);
}

.feedback-select,
.feedback-textarea,
.feedback-input-text {
  width: 100%;
  padding: 0.55rem 0.85rem;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  font-size: 0.9rem;
  background: #ffffff;
  outline: none;
  font-family: inherit;
  box-sizing: border-box;
}

.feedback-select:focus,
.feedback-textarea:focus,
.feedback-input-text:focus {
  border-color: var(--copper-accent);
  box-shadow: 0 0 0 3px rgba(194, 120, 3, 0.12);
}

.feedback-submit-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  background: var(--navy-dark);
  color: #ffffff;
  padding: 0.6rem 1.5rem;
  font-size: 0.92rem;
  font-weight: 700;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
  align-self: flex-start;
}

.feedback-submit-btn:hover {
  background: var(--navy-brand);
}

.feedback-success-alert {
  display: none;
  background: #f0fdf4;
  border: 1px solid #86efac;
  color: #166534;
  padding: 0.85rem 1rem;
  border-radius: 6px;
  font-size: 0.9rem;
  margin-top: 0.75rem;
  line-height: 1.6;
}

/* 6. 安装包矩阵与下载来源标签 (Download Matrix) */
.download-source-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
}

.tag-source-direct { background: #dbeafe; color: #1e40af; border: 1px solid #bfdbfe; }
.tag-source-release { background: #fef3c7; color: #92400e; border: 1px solid #fde68a; }
.tag-source-store { background: #f3e8ff; color: #6b21a8; border: 1px solid #e9d5ff; }
.tag-source-github { background: #f1f5f9; color: #334155; border: 1px solid #e2e8f0; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}