```css
:root {
  --bg-light: #f6f8fc;
  --bg-dark: #0b1a2a;
  --surface-light: #ffffff;
  --surface-dark: #152233;
  --surface-glass-light: rgba(255, 255, 255, 0.65);
  --surface-glass-dark: rgba(21, 34, 51, 0.65);
  --primary-light: #0a4b7a;
  --primary-dark: #7ab7e8;
  --primary-accent: #0a5d9e;
  --text-strong-light: #17202A;
  --text-body-light: #1F2937;
  --text-muted-light: #334155;
  --text-strong-dark: #F8FAFC;
  --text-body-dark: #E2E8F0;
  --text-muted-dark: #CBD5E1;
  --border-light: #d9e2ef;
  --border-dark: #2d3f54;
  --shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 12px 24px rgba(0, 0, 0, 0.12);
  --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.12);
  --gradient-banner-light: linear-gradient(145deg, #dfe9f5, #c3d6ea);
  --gradient-banner-dark: linear-gradient(145deg, #1e3a5f, #0d2137);
  --gradient-card-light: linear-gradient(145deg, #ffffff, #f0f4fa);
  --gradient-card-dark: linear-gradient(145deg, #1c2f40, #142432);
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --radius-pill: 30px;
  --transition-fast: 0.2s ease;
  --transition-smooth: 0.3s ease;
  --transition-bounce: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 80px;
}

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  background: var(--bg-light);
  color: var(--text-body-light);
  line-height: 1.7;
  font-size: 16px;
  transition: background 0.3s ease, color 0.3s ease;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.dark-mode {
  background: var(--bg-dark);
  color: var(--text-body-dark);
}

/* 文字层级 —— 高对比度 */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-strong-light);
  font-weight: 700;
  line-height: 1.3;
  transition: color 0.3s ease;
  word-break: break-word;
}

body.dark-mode h1,
body.dark-mode h2,
body.dark-mode h3,
body.dark-mode h4,
body.dark-mode h5,
body.dark-mode h6 {
  color: var(--text-strong-dark);
}

h1 {
  font-size: 2.6rem;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

h2 {
  font-size: 2rem;
  border-left: 6px solid var(--primary-accent);
  padding-left: 0.8rem;
  margin: 2.5rem 0 1.5rem;
  position: relative;
}

body.dark-mode h2 {
  border-left-color: #6ab0e6;
}

h3 {
  font-size: 1.5rem;
  margin: 1.8rem 0 0.8rem;
}

h4 {
  font-size: 1.2rem;
  margin: 1.2rem 0 0.6rem;
  font-weight: 600;
}

p {
  color: var(--text-body-light);
  margin: 1rem 0;
  line-height: 1.75;
}

body.dark-mode p {
  color: var(--text-body-dark);
}

a {
  color: var(--primary-accent);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease, opacity 0.2s ease;
  position: relative;
}

body.dark-mode a {
  color: #8bc9ff;
}

a:hover {
  text-decoration: underline;
  color: #083d63;
}

body.dark-mode a:hover {
  color: #b6dcff;
}

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

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

/* ========== 导航栏 ========== */
.navbar {
  background: var(--surface-glass-light);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08);
  padding: 0.8rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

body.dark-mode .navbar {
  background: rgba(16, 31, 47, 0.75);
  border-bottom-color: rgba(255, 255, 255, 0.05);
}

.navbar.scrolled {
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.logo {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-strong-light);
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
  transition: color 0.3s ease;
}

body.dark-mode .logo {
  color: var(--text-strong-dark);
}

.logo span {
  background: linear-gradient(135deg, #0a4b7a, #4a90d9);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

body.dark-mode .logo span {
  background: linear-gradient(135deg, #7ab7e8, #b6dcff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-menu {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.nav-menu a {
  color: var(--text-body-light);
  font-weight: 500;
  padding: 0.4rem 0.2rem;
  position: relative;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

body.dark-mode .nav-menu a {
  color: var(--text-body-dark);
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-accent);
  transition: width 0.3s ease;
  border-radius: 2px;
}

.nav-menu a:hover {
  text-decoration: none;
  color: var(--primary-accent);
}

.nav-menu a:hover::after {
  width: 100%;
}

body.dark-mode .nav-menu a:hover {
  color: #8bc9ff;
}

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-light);
  border-radius: 8px;
  padding: 8px 14px;
  cursor: pointer;
  font-size: 1.3rem;
  color: var(--text-strong-light);
  transition: all 0.2s ease;
  line-height: 1;
}

body.dark-mode .menu-toggle {
  color: var(--text-strong-dark);
  border-color: var(--border-dark);
}

.menu-toggle:hover {
  background: rgba(0, 0, 0, 0.05);
}

body.dark-mode .menu-toggle:hover {
  background: rgba(255, 255, 255, 0.05);
}

/* 搜索框 */
.search-box {
  display: flex;
  align-items: center;
  background: var(--surface-light);
  border-radius: var(--radius-pill);
  padding: 0.15rem 0.15rem 0.15rem 1rem;
  border: 1px solid var(--border-light);
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  max-width: 180px;
}

body.dark-mode .search-box {
  background: #1c2f40;
  border-color: var(--border-dark);
}

.search-box:focus-within {
  border-color: var(--primary-accent);
  box-shadow: 0 0 0 3px rgba(10, 75, 122, 0.1);
}

.search-box input {
  border: none;
  background: transparent;
  padding: 0.5rem;
  outline: none;
  color: var(--text-body-light);
  width: 100px;
  font-size: 0.9rem;
  transition: width 0.3s ease;
}

body.dark-mode .search-box input {
  color: var(--text-body-dark);
}

.search-box input::placeholder {
  color: var(--text-muted-light);
  opacity: 0.7;
}

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

.search-box input:focus {
  width: 130px;
}

.search-box button {
  background: linear-gradient(135deg, #0a4b7a, #0a5d9e);
  border: none;
  border-radius: var(--radius-pill);
  padding: 0.5rem 1rem;
  color: white;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.search-box button:hover {
  background: linear-gradient(135deg, #083d63, #0a4b7a);
  transform: scale(1.02);
}

/* 暗黑模式切换按钮 */
#darkToggle {
  background: none;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-pill);
  padding: 6px 12px;
  cursor: pointer;
  color: var(--text-strong-light);
  font-size: 1.1rem;
  transition: all 0.2s ease;
  line-height: 1;
  flex-shrink: 0;
}

body.dark-mode #darkToggle {
  color: var(--text-strong-dark);
  border-color: var(--border-dark);
}

#darkToggle:hover {
  background: rgba(0, 0, 0, 0.05);
  transform: rotate(15deg) scale(1.05);
}

body.dark-mode #darkToggle:hover {
  background: rgba(255, 255, 255, 0.05);
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem 0;
    gap: 0.8rem;
  }
  
  .nav-menu.open {
    display: flex;
    animation: slideDown 0.3s ease;
  }
  
  .menu-toggle {
    display: block;
  }
  
  .search-box {
    max-width: 140px;
  }
  
  .search-box input {
    width: 70px;
  }
  
  .search-box input:focus {
    width: 90px;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.6rem;
  }
  
  h3 {
    font-size: 1.3rem;
  }
}

/* ========== 按钮 ========== */
.btn {
  display: inline-block;
  background: linear-gradient(135deg, #0a4b7a, #0a5d9e);
  color: white !important;
  padding: 0.7rem 1.8rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  text-align: center;
  box-shadow: 0 4px 15px rgba(10, 75, 122, 0.25);
  position: relative;
  overflow: hidden;
}

body.dark-mode .btn {
  background: linear-gradient(135deg, #3a7ca5, #4a90d9);
  box-shadow: 0 4px 15px rgba(74, 144, 217, 0.3);
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.6s ease, height 0.6s ease;
}

.btn:hover {
  background: linear-gradient(135deg, #083d63, #0a4b7a);
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 25px rgba(10, 75, 122, 0.35);
  text-decoration: none;
  color: white !important;
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn:active {
  transform: translateY(-1px) scale(0.98);
}

/* ========== 卡片 ========== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.8rem;
  margin: 2rem 0;
}

.card {
  background: var(--surface-light);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-light);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #0a4b7a, #4a90d9, #7ab7e8);
  opacity: 0;
  transition: opacity 0.3s ease;
}

body.dark-mode .card {
  background: #1c2f40;
  border-color: var(--border-dark);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(10, 93, 158, 0.3);
}

.card:hover::before {
  opacity: 1;
}

.card h3 {
  margin-top: 0;
  font-size: 1.3rem;
  position: relative;
  padding-bottom: 0.5rem;
}

.card h3::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-accent), transparent);
}

.card h4 {
  margin-top: 0.5rem;
}

/* ========== Banner ========== */
.banner-section {
  background: var(--gradient-banner-light);
  padding: 4rem 0;
  transition: background 0.3s ease;
  position: relative;
  overflow: hidden;
}

body.dark-mode .banner-section {
  background: var(--gradient-banner-dark);
}

.banner-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(10, 75, 122, 0.08), transparent 70%);
  border-radius: 50%;
  animation: floatBlob 8s ease-in-out infinite;
}

.banner-section::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(74, 144, 217, 0.08), transparent 70%);
  border-radius: 50%;
  animation: floatBlob 12s ease-in-out infinite reverse;
}

@keyframes floatBlob {
  0%, 100% {
    transform: translateY(0) scale(1);
  }
  50% {
    transform: translateY(-20px) scale(1.05);
  }
}

.banner-content {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2rem;
  position: relative;
  z-index: 1;
}

.banner-text {
  flex: 1 1 300px;
}

.banner-text h1 {
  font-size: 2.8rem;
  line-height: 1.2;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #0a2f4d, #0a5d9e);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

body.dark-mode .banner-text h1 {
  background: linear-gradient(135deg, #f8fafc, #7ab7e8);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.banner-text p {
  font-size: 1.15rem;
  color: #1F2937;
  margin-bottom: 1.5rem;
  max-width: 500px;
}

body.dark-mode .banner-text p {
  color: var(--text-body-dark);
}

.banner-visual {
  flex: 1 1 200px;
  background: var(--surface-glass-light);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-glass);
  border: 1px solid rgba(255, 255, 255, 0.4);
  transition: transform 0.3s ease;
}

body.dark-mode .banner-visual {
  background: var(--surface-glass-dark);
  border-color: rgba(255, 255, 255, 0.1);
}

.banner-visual:hover {
  transform: scale(1.02);
}

.banner-visual svg {
  max-width: 100%;
  height: auto;
}

/* ========== 毛玻璃工具类 ========== */
.glass {
  background: var(--surface-glass-light);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-glass);
}

body.dark-mode .glass {
  background: var(--surface-glass-dark);
  border-color: rgba(255, 255, 255, 0.08);
}

/* ========== 详情/FAQ ========== */
details {
  background: var(--surface-light);
  padding: 1.2rem 1.5rem;
  border-radius: 16px;
  margin: 0.8rem 0;
  border: 1px solid var(--border-light);
  transition: all 0.3s ease;
  cursor: pointer;
  overflow: hidden;
}

body.dark-mode details {
  background: #1c2f40;
  border-color: var(--border-dark);
}

details:hover {
  border-color: rgba(10, 93, 158, 0.4);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

details[open] {
  border-color: var(--primary-accent);
  box-shadow: 0 4px 16px rgba(10, 75, 122, 0.1);
}

summary {
  font-weight: 600;
  cursor: pointer;
  color: var(--text-strong-light);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  user-select: none;
  transition: color 0.2s ease;
}

body.dark-mode summary {
  color: var(--text-strong-dark);
}

summary::before {
  content: '▸';
  transition: transform 0.3s ease;
  color: var(--primary-accent);
  font-size: 1.1rem;
}

details[open] summary::before {
  transform: rotate(90deg);
}

summary:hover {
  color: var(--primary-accent);
}

body.dark-mode summary:hover {
  color: #8bc9ff;
}

.faq-answer {
  margin-top: 0.8rem;
  color: var(--text-body-light);
  padding-left: 1.5rem;
  border-left: 3px solid rgba(10, 93, 158, 0.2);
  animation: fadeIn 0.3s ease;
}

body.dark-mode .faq-answer {
  color: var(--text-body-dark);
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========== 表格 ========== */
.table-wrap {
  overflow-x: auto;
  margin: 1.5rem 0;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface-light);
  border-radius: var(--radius-md);
  overflow: hidden;
}

body.dark-mode table {
  background: #1c2f40;
}

th, td {
  padding: 1rem 1.2rem;
  text-align: left;
  border-bottom: 1px solid var(--border-light);
  transition: background 0.2s ease;
}

body.dark-mode th,
body.dark-mode td {
  border-color: var(--border-dark);
  color: var(--text-body-dark);
}

th {
  background: linear-gradient(135deg, #e9f0fa, #dce8f5);
  color: #0a2f4d;
  font-weight: 600;
  white-space: nowrap;
}

body.dark-mode th {
  background: linear-gradient(135deg, #2a3e55, #1f3045);
  color: white;
}

tbody tr:hover {
  background: rgba(10, 93, 158, 0.04);
}

body.dark-mode tbody tr:hover {
  background: rgba(122, 183, 232, 0.06);
}

/* ========== 页脚 ========== */
footer {
  background: linear-gradient(135deg, #0a1e2f, #0d2a42);
  color: #cbd5e1;
  padding: 3rem 0;
  margin-top: 4rem;
  position: relative;
}

body.dark-mode footer {
  background: linear-gradient(135deg, #07111d, #0a1a2a);
}

footer h4 {
  color: #fff !important;
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

footer a {
  color: #8bc9ff;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

footer a:hover {
  color: #b6dcff;
  padding-left: 4px;
  text-decoration: none;
}

footer p {
  color: #94a3b8;
  font-size: 0.9rem;
}

.foot-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

@media (max-width: 700px) {
  .foot-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

/* ========== SVG占位符 ========== */
.svg-placeholder {
  background: linear-gradient(135deg, #d9e6f2, #c3d6ea);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  text-align: center;
  color: #17202A;
  border: 1px solid rgba(255, 255, 255, 0.3);
  transition: all 0.3s ease;
}

body.dark-mode .svg-placeholder {
  background: linear-gradient(135deg, #2a3e55, #1c2f40);
  color: #f1f5f9;
  border-color: rgba(255, 255, 255, 0.08);
}

.svg-placeholder:hover {
  transform: scale(1.01);
  box-shadow: var(--shadow);
}

/* ========== 工具类 ========== */
.text-muted {
  color: var(--text-muted-light);
}

body.dark-mode .text-muted {
  color: var(--text-muted-dark);
}

.badge {
  background: linear-gradient(135deg, #0a4b7a, #0a5d9e);
  color: white;
  padding: 0.25rem 1rem;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 500;
  display: inline-block;
  transition: all 0.2s ease;
}

body.dark-mode .badge {
  background: linear-gradient(135deg, #3a7ca5, #4a90d9);
}

.badge:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(10, 75, 122, 0.3);
}

/* ========== 滚动动画 ========== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: opacity, transform;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 延迟动画 */
.reveal-delay-1 {
  transition-delay: 0.1s;
}

.reveal-delay-2 {
  transition-delay: 0.2s;
}

.reveal-delay-3 {
  transition-delay: 0.3s;
}

/* ========== 返回顶部 ========== */
#topBtn {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: linear-gradient(135deg, #0a4b7a, #0a5d9e);
  color: white;
  border: none;
  border-radius: 50%;
  width: 52px;
  height: 52px;
  font-size: 1.5rem;
  cursor: pointer;
  z-index: 999;
  box-shadow: 0 4px 20px rgba(10, 75, 122, 0.35);
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
}

#topBtn.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

#topBtn:hover {
  background: linear-gradient(135deg, #083d63, #0a4b7a);
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 8px 30px rgba(10, 75, 122, 0.45);
}

#topBtn:active {
  transform: translateY(-2px) scale(0.95);
}

@media (max-width: 768px) {
  #topBtn {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    font-size: 1.2rem;
  }
}

/* ========== 区块通用样式 ========== */
section {
  padding: 1rem 0;
  scroll-margin-top: 80px;
}

section + section {
  margin-top: 1rem;
}

/* 引用块 */
blockquote {
  background: var(--surface-light);
  padding: 1.5rem 2rem;
  border-radius: var(--radius-md);
  border-left: 6px solid var(--primary-accent);
  margin: 1.5rem 0;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
}

body.dark-mode blockquote {
  background: #1c2f40;
}

blockquote:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-hover);
}

blockquote p {
  margin: 0.5rem 0;
  font-size: 1.05rem;
}

/* 文章列表 */
.article-list {
  display: grid;
  gap: 1rem;
  margin: 1.5rem 0;
}

.article-list article {
  background: var(--surface-light);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  border: 1px solid var(--border-light);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

body.dark-mode .article-list article {
  background: #1c2f40;
  border-color: var(--border-dark);
}

.article-list article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(10, 93, 158, 0.3);
}

.article-list article::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--primary-accent), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.article-list article:hover::before {
  opacity: 1;
}

.article-list time {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted-light);
  margin-bottom: 0.5rem;
}

body.dark-mode .article-list time {
  color: var(--text-muted-dark);
}

.article-list h4 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.article-list a {
  display: inline-block;
  margin-top: 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
}

/* 联系区块 */
.contact-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  background: var(--surface-light);
  padding: 2rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: 1px solid var(--border-light);
  transition: all 0.3s ease;
}

body.dark-mode .contact-grid {
  background: #1c2f40;
  border-color: var(--border-dark);
}

.contact-item {
  flex: 1 1 250px;
}

.contact-item p {
  margin: 0.6rem 0;
}

/* 有序列表 */
ol {
  margin-left: 1.5rem;
  padding-left: 0.5rem;
}

ol li {
  margin-bottom: 0.5rem;
  padding-left: 0.5rem;
  position: relative;
  transition: transform 0.2s ease;
}

ol li:hover {
  transform: translateX(4px);
}

ol li::marker {
  color: var(--primary-accent);
  font-weight: 600;
}

/* 无序列表 */
ul {
  margin-left: 1.5rem;
  padding-left: 0.5rem;
}

ul li {
  margin-bottom: 0.4rem;
  position: relative;
}

ul li::before {
  content: '•';
  color: var(--primary-accent);
  font-weight: bold;
  display: inline-block;
  width: 1.2em;
  margin-left: -1.2em;
}

/* ========== 响应式增强 ========== */
@media (max-width: 1024px) {
  .container {
    padding: 0 20px;
  }
  
  h1 {
    font-size: 2.2rem;
  }
  
  .banner-text h1 {
    font-size: 2.2rem;
  }
}

@media (max-width: 640px) {
  .container {
    padding: 0 16px;
  }
  
  h1 {
    font-size: 1.8rem;
  }
  
  h2 {
    font-size: 1.5rem;
    border-left-width: 4px;
  }
  
  h3 {
    font-size: 1.2rem;
  }
  
  .card {
    padding: 1.5rem;
  }
  
  .banner-text h1 {
    font-size: 1.8rem;
  }
  
  .banner-text p {
    font-size: 1rem;
  }
  
  blockquote {
    padding: 1rem 1.2rem;
  }
  
  .contact-grid {
    padding: 1.5rem;
  }
}

/* ========== 动画 ========== */
@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

/* 滚动条美化 */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.05);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, #0a4b7a, #4a90d9);
  border-radius: 10px;
  transition: background 0.3s ease;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(135deg, #083d63, #0a5d9e);
}

body.dark-mode ::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.05);
}

body.dark-mode ::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, #2a3e55, #4a90d9);
}

/* 选中文本样式 */
::selection {
  background: rgba(10, 93, 158, 0.2);
  color: #0a2f4d;
}

body.dark-mode ::selection {
  background: rgba(122, 183, 232, 0.3);
  color: #f8fafc;
}

/* 焦点可见性 */
:focus-visible {
  outline: 3px solid rgba(10, 93, 158, 0.5);
  outline-offset: 2px;
}

/* 打印友好 */
@media print {
  .navbar,
  #topBtn,
  .search-box,
  #darkToggle,
  .menu-toggle {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .container {
    max-width: 100%;
  }
  
  .card,
  blockquote,
  details,
  .contact-grid,
  .article-list article {
    box-shadow: none;
    border: 1px solid #ccc;
    break-inside: avoid;
  }
  
  h2 {
    border-left-color: #333;
  }
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* 高对比度模式支持 */
@media (forced-colors: active) {
  .btn,
  .badge,
  #topBtn,
  .search-box button {
    border: 2px solid CanvasText;
    forced-color-adjust: auto;
  }
  
  .card,
  blockquote,
  details,
  .contact-grid,
  .article-list article {
    border: 2px solid CanvasText;
  }
}

/* 安全区域适配 */
@supports (padding: env(safe-area-inset-bottom)) {
  footer {
    padding-bottom: calc(3rem + env(safe-area-inset-bottom));
  }
  
  .navbar {
    padding-top: calc(0.8rem + env(safe-area-inset-top));
  }
}
```