/* ===========================
   xinjiapo.net — Main Stylesheet
   =========================== */

/* --- Variables --- */
:root {
  --accent: #E63329;
  --accent-dark: #b82820;
  --text: #1a1a1a;
  --text-light: #555;
  --text-muted: #888;
  --border: #e0e0e0;
  --bg: #ffffff;
  --bg-soft: #f7f7f5;
  --bg-card: #ffffff;
  --sidebar-width: 240px;
  --content-max: 760px;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-heading: 'Noto Serif SC', 'Songti SC', 'SimSun', serif;
}

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

html {
  font-size: 18px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

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

a:hover {
  text-decoration: underline;
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}

/* --- Layout --- */
.site-wrapper {
  display: flex;
  min-height: 100vh;
  flex-direction: column;
}

.layout {
  display: flex;
  flex: 1;
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
  padding: 0 16px;
}

/* --- Header --- */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 16px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-logo {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  letter-spacing: 0.02em;
}

.site-logo span {
  color: var(--accent);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--text);
}

.nav-toggle svg {
  display: block;
}

/* --- Sidebar --- */
.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  padding: 32px 24px 32px 0;
  position: sticky;
  top: 56px;
  height: calc(100vh - 56px);
  overflow-y: auto;
}

.sidebar-section {
  margin-bottom: 28px;
}

.sidebar-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 8px;
  display: block;
}

.sidebar-nav {
  list-style: none;
}

.sidebar-nav li {
  margin-bottom: 2px;
}

.sidebar-nav a {
  display: block;
  padding: 5px 8px;
  border-radius: 4px;
  font-size: 0.875rem;
  color: var(--text);
  transition: background 0.15s, color 0.15s;
  text-decoration: none;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
  background: var(--bg-soft);
  color: var(--accent);
}

/* --- Main Content --- */
.main-content {
  flex: 1;
  min-width: 0;
  padding: 40px 0 80px 40px;
  max-width: var(--content-max);
}

/* --- Homepage Hero --- */
.home-hero {
  padding: 48px 0 40px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 40px;
}

.home-hero h1 {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 12px;
  color: var(--text);
}

.home-hero .tagline {
  font-size: 1rem;
  color: var(--text-light);
  max-width: 500px;
}

/* --- Search --- */
.search-wrap {
  margin-bottom: 48px;
}

.search-box {
  display: flex;
  align-items: center;
  border: 2px solid var(--border);
  border-radius: 6px;
  background: var(--bg-soft);
  transition: border-color 0.15s;
  max-width: 480px;
}

.search-box:focus-within {
  border-color: var(--accent);
  background: var(--bg);
}

.search-box svg {
  margin: 0 12px;
  flex-shrink: 0;
  color: var(--text-muted);
}

.search-box input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 10px 12px 10px 0;
  font-size: 0.95rem;
  font-family: var(--font-body);
  color: var(--text);
  outline: none;
}

.search-box input::placeholder {
  color: var(--text-muted);
}

#search-results {
  margin-top: 8px;
}

#search-results .no-results {
  font-size: 0.875rem;
  color: var(--text-muted);
  padding: 8px 0;
}

/* --- Guide Cards --- */
.section-heading {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.guide-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.guide-card {
  display: block;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  text-decoration: none;
  color: var(--text);
  background: var(--bg-card);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.guide-card:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 12px rgba(230,51,41,0.08);
  text-decoration: none;
}

.guide-card .card-category {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 6px;
}

.guide-card h2 {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 6px;
  line-height: 1.4;
}

.guide-card .card-desc {
  font-size: 0.85rem;
  color: var(--text-light);
  line-height: 1.5;
  margin-bottom: 12px;
}

.guide-card .card-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* --- Guide Page --- */
.breadcrumb {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.breadcrumb a {
  color: var(--text-muted);
}

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

.breadcrumb span {
  margin: 0 6px;
}

.guide-header {
  margin-bottom: 36px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
}

.guide-header h1 {
  font-family: var(--font-heading);
  font-size: 1.9rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 12px;
}

.guide-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* --- TOC --- */
.toc {
  background: var(--bg-soft);
  border-left: 3px solid var(--accent);
  border-radius: 0 6px 6px 0;
  padding: 20px 24px;
  margin-bottom: 40px;
}

.toc-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.toc ol {
  list-style: decimal;
  padding-left: 20px;
}

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

.toc a {
  font-size: 0.875rem;
  color: var(--text);
}

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

/* --- Article Body --- */
.guide-body {
  font-size: 1rem;
}

.guide-body h2 {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  margin: 48px 0 16px;
  padding-top: 8px;
  color: var(--text);
}

.guide-body h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  margin: 32px 0 12px;
  color: var(--text);
}

.guide-body p {
  margin-bottom: 16px;
}

.guide-body ul,
.guide-body ol {
  padding-left: 24px;
  margin-bottom: 16px;
}

.guide-body li {
  margin-bottom: 6px;
}

.guide-body strong {
  font-weight: 700;
}

.guide-body em {
  font-style: italic;
}

.guide-body table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 24px;
  font-size: 0.875rem;
}

.guide-body th {
  background: var(--bg-soft);
  padding: 10px 14px;
  text-align: left;
  font-weight: 700;
  border: 1px solid var(--border);
}

.guide-body td {
  padding: 10px 14px;
  border: 1px solid var(--border);
  vertical-align: top;
}

.guide-body tr:nth-child(even) td {
  background: #fafafa;
}

.callout {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 0 6px 6px 0;
  padding: 16px 20px;
  margin: 24px 0;
  font-size: 0.9rem;
}

.callout-tip {
  border-left-color: #2a9d4e;
}

.callout-warning {
  border-left-color: #e69b29;
}

.callout strong {
  display: block;
  margin-bottom: 4px;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.callout-tip strong { color: #2a9d4e; }
.callout-warning strong { color: #e69b29; }
.callout strong.accent { color: var(--accent); }

/* --- Feedback Widget --- */
.feedback-widget {
  margin-top: 56px;
  padding: 24px;
  background: var(--bg-soft);
  border-radius: 8px;
  text-align: center;
}

.feedback-widget p {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 12px;
}

.feedback-btns {
  display: flex;
  gap: 12px;
  justify-content: center;
}

.btn-feedback {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 0.875rem;
  font-family: var(--font-body);
  cursor: pointer;
  background: var(--bg);
  color: var(--text);
  transition: border-color 0.15s, background 0.15s;
}

.btn-feedback:hover {
  border-color: var(--accent);
  background: rgba(230,51,41,0.05);
}

.btn-feedback.voted {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(230,51,41,0.05);
}

.feedback-thanks {
  font-size: 0.875rem;
  color: #2a9d4e;
  display: none;
}

/* --- Footer --- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 16px;
  background: var(--bg-soft);
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  color: var(--text-muted);
}

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

/* --- Mobile --- */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .layout {
    flex-direction: column;
    padding: 0;
  }

  .sidebar {
    position: fixed;
    top: 56px;
    left: 0;
    width: 100%;
    height: calc(100vh - 56px);
    background: var(--bg);
    z-index: 99;
    padding: 24px 20px;
    border-right: none;
    border-bottom: 1px solid var(--border);
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    overflow-y: auto;
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .main-content {
    padding: 24px 20px 60px;
    max-width: 100%;
  }

  .home-hero h1 {
    font-size: 1.7rem;
  }

  .guide-grid {
    grid-template-columns: 1fr;
  }

  .guide-header h1 {
    font-size: 1.5rem;
  }

  .guide-body h2 {
    font-size: 1.2rem;
  }

  .guide-body table {
    display: block;
    overflow-x: auto;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (min-width: 769px) and (max-width: 960px) {
  :root {
    --sidebar-width: 200px;
  }

  .main-content {
    padding-left: 28px;
  }
}