/* === 全局样式 · 太虚幻境主题 === */

:root {
  --bg: #faf8f5;
  --bg-card: #ffffff;
  --text: #2c2c2c;
  --text-secondary: #6b6b6b;
  --text-muted: #999999;
  --accent: #8b3a3a;
  --accent-light: #c4836e;
  --accent-gold: #c9a050;
  --accent-dim: #b5664466;
  --border: #e8e2da;
  --shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 6px 28px rgba(139,58,58,0.13);
  --radius: 12px;
  --font-title: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", "Cascadia Code", "Menlo", "Consolas", monospace;
}

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

/* 星辰背景 */
body {
  font-family: var(--font-body);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.8;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image:
    radial-gradient(circle at 15% 20%, rgba(139,58,58,0.04) 0%, transparent 50%),
    radial-gradient(circle at 85% 80%, rgba(201,160,80,0.04) 0%, transparent 50%),
    radial-gradient(1px 1px at 10% 15%, rgba(201,160,80,0.3) 0%, transparent 100%),
    radial-gradient(1px 1px at 30% 45%, rgba(139,58,58,0.2) 0%, transparent 100%),
    radial-gradient(1px 1px at 55% 20%, rgba(201,160,80,0.25) 0%, transparent 100%),
    radial-gradient(1px 1px at 70% 60%, rgba(139,58,58,0.2) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 88% 25%, rgba(201,160,80,0.35) 0%, transparent 100%),
    radial-gradient(1px 1px at 95% 75%, rgba(201,160,80,0.2) 0%, transparent 100%),
    radial-gradient(1px 1px at 42% 85%, rgba(139,58,58,0.15) 0%, transparent 100%);
  pointer-events: none;
  z-index: 0;
}

body > * {
  position: relative;
  z-index: 1;
}

/* === 导航栏 === */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 248, 245, 0.93);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
}

.nav::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(139,58,58,0.18), rgba(201,160,80,0.18), transparent);
}

.nav-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.nav-brand {
  font-family: var(--font-title);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: 0.12em;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.nav-brand::before {
  content: '✦';
  font-size: 0.7rem;
  color: var(--accent-gold);
  animation: twinkle 2.5s ease-in-out infinite;
}

@keyframes twinkle {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

.nav-brand:hover { color: var(--accent-light); }

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: color 0.2s;
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-gold));
  border-radius: 1px;
}

/* === 主要内容 === */

.main {
  flex: 1;
  max-width: 960px;
  margin: 0 auto;
  padding: 3rem 2rem 4rem;
  width: 100%;
}

/* === Hero 区域 === */

.hero {
  text-align: center;
  padding: 4rem 0 3rem;
  position: relative;
}

/* Hero 赤心辉环 */
.hero::before {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 300px; height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139,58,58,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero-symbol {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: block;
  animation: float 3s ease-in-out infinite;
  position: relative;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.hero h1 {
  font-family: var(--font-title);
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  margin-bottom: 0.75rem;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero .tagline {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 300;
  letter-spacing: 0.1em;
}

/* Hero 副标题 */
.hero .tagline {
  display: inline-block;
  margin-top: 0.75rem;
  font-size: 0.75rem;
  color: var(--accent-gold);
  letter-spacing: 0.05em;
  opacity: 0.7;
}

.hero-line {
  width: 60px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-light), var(--accent-gold), transparent);
  margin: 1.5rem auto 0;
}

/* === 栏目区域 === */

.section-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 2rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
  position: relative;
}

.section-header::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 0;
  width: 40px; height: 1px;
  background: linear-gradient(90deg, var(--accent), var(--accent-gold));
}

.section-header .icon { font-size: 1.4rem; }

.section-header h2 {
  font-family: var(--font-title);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text);
}

/* === 卡片 === */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-decoration: none;
  color: inherit;
  transition: all 0.25s ease;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

/* 卡片光晕 */
.card::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 80px; height: 80px;
  background: radial-gradient(circle at top right, rgba(201,160,80,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent-light);
}

.card-icon { font-size: 2rem; margin-bottom: 0.75rem; }

.card h3 {
  font-family: var(--font-title);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
}

.card .tag {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.2rem 0.6rem;
  font-size: 0.75rem;
  background: #f7f0e8;
  color: var(--accent);
  border-radius: 100px;
  align-self: flex-start;
}

.card .badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 1rem;
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 500;
}

/* === AI学习 · 目录分组 === */

.learning-chapter {
  margin-bottom: 3rem;
}

.chapter-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding: 1rem 1.5rem;
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
}

.chapter-header-1 {
  background: linear-gradient(135deg, rgba(139,58,58,0.05) 0%, rgba(201,160,80,0.05) 100%);
  border: 1px solid rgba(139,58,58,0.12);
}

.chapter-header-2 {
  background: linear-gradient(135deg, rgba(58,100,139,0.05) 0%, rgba(80,160,150,0.05) 100%);
  border: 1px solid rgba(58,100,139,0.12);
}

.chapter-header-3 {
  background: linear-gradient(135deg, rgba(100,80,139,0.05) 0%, rgba(139,100,58,0.05) 100%);
  border: 1px solid rgba(100,80,139,0.12);
}

.chapter-icon {
  font-size: 1.8rem;
  flex-shrink: 0;
}

.chapter-header h2 {
  font-family: var(--font-title);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.chapter-header-1 h2 { color: var(--accent); }
.chapter-header-2 h2 { color: #3a648b; }
.chapter-header-3 h2 { color: #64508b; }

.chapter-header p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 0.15rem;
}

/* 章节装饰纹 */
.chapter-header::after {
  content: '✦';
  position: absolute;
  right: 1.5rem;
  font-size: 1.2rem;
  opacity: 0.15;
  color: var(--accent);
}

/* === 占位栏目 === */

.placeholder-section {
  text-align: center;
  padding: 3rem 2rem;
  background: var(--bg-card);
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  margin-bottom: 3rem;
}

.placeholder-section .icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  display: block;
}

.placeholder-section h3 {
  font-family: var(--font-title);
  font-size: 1.1rem;
  color: var(--text-secondary);
  font-weight: 400;
  margin-bottom: 0.5rem;
}

.placeholder-section p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* === 页脚 === */

.footer {
  border-top: 1px solid var(--border);
  padding: 2rem;
  text-align: center;
  position: relative;
}

/* 页脚装饰 */
.footer::before {
  content: '';
  display: block;
  width: 40px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-gold), transparent);
  margin: 0 auto 1rem;
  opacity: 0.4;
}

.footer-inner { max-width: 960px; margin: 0 auto; }

.footer-brand {
  font-family: var(--font-title);
  font-size: 1rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 0.5rem;
  letter-spacing: 0.1em;
}

.footer-info {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.8;
}

.footer-info a { color: var(--text-muted); text-decoration: none; }
.footer-info a:hover { color: var(--accent); }

/* === 子页面标题 === */

.page-header {
  text-align: center;
  padding: 2rem 0;
  position: relative;
}

.page-header::after {
  content: '';
  display: block;
  width: 60px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-light), var(--accent-gold), transparent);
  margin: 1rem auto 0;
}

.page-header h1 {
  font-family: var(--font-title);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
}

.page-header p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* === 外链卡片 === */

.external-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: all 0.25s ease;
  box-shadow: var(--shadow);
}

.external-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent-light);
}

.external-card .preview {
  background: linear-gradient(135deg, #f8f3ea 0%, #f0e8d8 100%);
  padding: 2rem;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 120px;
  position: relative;
  overflow: hidden;
}

/* 外链卡预览纹 */
.external-card .preview::after {
  content: '✦';
  position: absolute;
  font-size: 4rem;
  color: var(--accent-gold);
  opacity: 0.06;
  bottom: -0.5rem; right: 0.5rem;
}

.external-card .preview-icon { font-size: 3rem; }

.external-card .card-body { padding: 1.5rem; }

.external-card h3 {
  font-family: var(--font-title);
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
}

.external-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.external-card .card-footer {
  padding: 0.75rem 1.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--accent);
}

/* === 分析页面通用 === */

.analysis-section { margin-bottom: 3rem; }

.insight-box {
  background: linear-gradient(135deg, #faf6f0 0%, #f5efe4 100%);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1.5rem 2rem;
  margin-bottom: 2rem;
}

.insight-box p { font-size: 0.95rem; color: var(--text); line-height: 1.8; }
.insight-box em { font-style: normal; color: var(--accent); font-weight: 500; }

/* 深度拆解卡片 */

.deep-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
}

.deep-header {
  padding: 1.5rem 2rem;
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}

.deep-l1 { border-left: 4px solid #7fa998; background: linear-gradient(135deg, #f8faf9 0%, #f1f6f3 100%); }
.deep-l2 { border-left: 4px solid #8b9dc3; background: linear-gradient(135deg, #f8f9fb 0%, #f0f3f8 100%); }
.deep-l3 { border-left: 4px solid #c49b6c; background: linear-gradient(135deg, #faf8f4 0%, #f5efe4 100%); }
.deep-l4 { border-left: 4px solid #9b6cb4; background: linear-gradient(135deg, #f9f7fb 0%, #f3eff7 100%); }

.deep-num {
  font-family: var(--font-title);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent);
  opacity: 0.25;
  line-height: 1;
  flex-shrink: 0;
}

.deep-header h3 { font-family: var(--font-title); font-size: 1.1rem; font-weight: 600; margin-bottom: 0.25rem; }
.deep-header p { font-size: 0.88rem; color: var(--text-secondary); }

.deep-body {
  padding: 1.5rem 2rem;
  border-top: 1px solid var(--border);
}

.deep-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.deep-item h4 { font-family: var(--font-title); font-size: 0.88rem; font-weight: 600; color: var(--accent); margin-bottom: 0.35rem; }
.deep-item p { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.7; }

/* 组合表 */

.combo-table { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.combo-row { display: grid; grid-template-columns: 1.4fr 1.6fr 1.8fr; padding: 0.9rem 1.5rem; font-size: 0.88rem; align-items: center; }
.combo-header { background: #f8f6f2; font-weight: 600; font-size: 0.82rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; border-bottom: 1px solid var(--border); }
.combo-row:not(.combo-header) { border-bottom: 1px solid var(--border); }
.combo-row:last-child { border-bottom: none; }
.combo-row:not(.combo-header):hover { background: #faf9f7; }

/* 判据卡片 */

.criteria-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.criteria-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.5rem; box-shadow: var(--shadow); transition: all 0.2s ease; }
.criteria-card:hover { box-shadow: var(--shadow-hover); border-color: var(--accent-light); }
.criteria-num { font-family: var(--font-title); font-size: 2rem; font-weight: 800; color: var(--accent); opacity: 0.2; margin-bottom: 0.75rem; }
.criteria-card h3 { font-family: var(--font-title); font-size: 1rem; font-weight: 600; margin-bottom: 0.75rem; }
.criteria-card p { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 0.5rem; }
.criteria-card ul { list-style: none; padding: 0; }
.criteria-card li { font-size: 0.82rem; color: var(--text-secondary); padding: 0.3rem 0; padding-left: 1rem; position: relative; }
.criteria-card li::before { content: '—'; position: absolute; left: 0; color: var(--accent-light); }
.criteria-card em { font-style: normal; color: var(--accent); font-weight: 500; }

/* 结语 */

.closing-box { text-align: center; padding: 2rem; }
.closing-box > p { font-size: 1rem; color: var(--text); margin-bottom: 1.5rem; }
.closing-trio { display: flex; gap: 1.5rem; justify-content: center; }
.closing-item { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.25rem; flex: 1; max-width: 250px; }
.closing-icon { font-size: 1.5rem; display: block; margin-bottom: 0.5rem; }
.closing-item strong { display: block; font-size: 0.95rem; margin-bottom: 0.25rem; }
.closing-item p { font-size: 0.8rem; color: var(--text-secondary); line-height: 1.5; }

/* 返回链接 */

.back-link { text-align: center; margin-top: 1rem; padding-top: 2rem; border-top: 1px solid var(--border); }
.back-link a { color: var(--accent); text-decoration: none; font-size: 0.9rem; transition: color 0.2s; }
.back-link a:hover { color: var(--accent-light); }

/* 教程目录 */

.tutorial-toc {
  background: linear-gradient(135deg, #faf6f0 0%, #f5efe4 100%);
  border: 1px solid rgba(139,58,58,0.12);
  border-radius: var(--radius);
  padding: 1.5rem 2rem;
  margin-bottom: 2.5rem;
}

.tutorial-toc h3 {
  font-family: var(--font-title);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 0.75rem;
  letter-spacing: 0.05em;
}

.tutorial-toc ol {
  padding-left: 1.2rem;
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 2;
}

.tutorial-toc ol li a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

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

.tool-section {
  margin-bottom: 3rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--border);
}

.tool-section:last-of-type { border-bottom: none; }

.tool-hero {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  padding: 2rem;
  border-radius: var(--radius);
  margin-bottom: 2rem;
  position: relative;
  overflow: hidden;
}

.tool-hero-claude {
  background: linear-gradient(135deg, rgba(139,58,58,0.06) 0%, rgba(201,160,80,0.04) 100%);
  border: 1px solid rgba(139,58,58,0.15);
}

.tool-hero-codex {
  background: linear-gradient(135deg, rgba(58,100,139,0.06) 0%, rgba(80,160,150,0.04) 100%);
  border: 1px solid rgba(58,100,139,0.15);
}

.tool-logo {
  font-size: 2.5rem;
  flex-shrink: 0;
}

.tool-hero h2 {
  font-family: var(--font-title);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.tool-hero-claude h2 { color: var(--accent); }
.tool-hero-codex h2 { color: #3a648b; }

.tool-hero p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; }

.tool-badge {
  display: inline-block;
  margin-top: 0.5rem;
  padding: 0.2rem 0.7rem;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-claude { background: #fdecea; color: var(--accent); }
.badge-codex  { background: #e8f0fd; color: #3a648b; }

.step-list {
  list-style: none;
  padding: 0;
  counter-reset: step;
  margin-bottom: 2rem;
}

.step-list > li {
  counter-increment: step;
  display: flex;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
  position: relative;
}

.step-list > li::before {
  content: counter(step);
  flex-shrink: 0;
  width: 2rem; height: 2rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  margin-top: 0.1rem;
}

.step-claude li::before { background: rgba(139,58,58,0.1); color: var(--accent); }
.step-codex  li::before { background: rgba(58,100,139,0.1); color: #3a648b; }

.step-content h4 {
  font-family: var(--font-title);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.step-content p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; }
.step-content p + p { margin-top: 0.5rem; }

pre, .code-block {
  background: #1e1e1e;
  color: #d4d4d4;
  border-radius: 8px;
  padding: 1rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
  overflow-x: auto;
  margin: 0.75rem 0 1rem;
  border: 1px solid #333;
  position: relative;
}

pre .comment { color: #6a9955; }
pre .string  { color: #ce9178; }
pre .keyword { color: #569cd6; }
pre .cmd     { color: #4ec9b0; }

.inline-code {
  background: rgba(139,58,58,0.07);
  color: var(--accent);
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85em;
}

.tip-box {
  background: linear-gradient(135deg, #faf6f0 0%, #f5efe4 100%);
  border-left: 3px solid var(--accent-gold);
  border-radius: 0 8px 8px 0;
  padding: 1rem 1.25rem;
  margin: 1rem 0;
  font-size: 0.88rem;
  color: var(--text);
  line-height: 1.7;
}

.tip-box strong { color: var(--accent-gold); }

.warn-box {
  background: rgba(139,58,58,0.04);
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  padding: 1rem 1.25rem;
  margin: 1rem 0;
  font-size: 0.88rem;
  color: var(--text);
  line-height: 1.7;
}

.warn-box strong { color: var(--accent); }

.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin: 1.5rem 0;
}

.compare-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.compare-card h4 {
  font-family: var(--font-title);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.compare-card ul {
  list-style: none;
  padding: 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.9;
}

.compare-card ul li::before { content: '· '; color: var(--accent-gold); }

/* === 响应式 === */

@media (max-width: 640px) {
  .nav { padding: 0 1rem; }
  .nav-links { gap: 1.2rem; }
  .main { padding: 2rem 1rem 3rem; }
  .hero h1 { font-size: 1.8rem; }
  .cards { grid-template-columns: 1fr; }
  .hero { padding: 2rem 0 2rem; }
  .deep-grid { grid-template-columns: 1fr; }
  .criteria-grid { grid-template-columns: 1fr; }
  .closing-trio { flex-direction: column; align-items: center; }
  .compare-grid { grid-template-columns: 1fr; }
  .special-forms { grid-template-columns: 1fr; }
}