```css
/* =========================================================
   萝莉社 - 完整样式表 (style.css)
   设计风格: 甜美粉彩 / 毛玻璃 / 圆角卡片 / 暗色模式
   版本: 1.0
   ========================================================= */

/* ---------- CSS 变量与主题令牌 ---------- */
:root {
  /* 主色板 - 甜美萝莉风 */
  --color-primary: #FFB6C1;        /* 粉红 */
  --color-primary-light: #FFD1DC;  /* 浅粉 */
  --color-primary-dark: #D6336C;   /* 深玫红 */
  --color-accent: #FFE4E9;         /* 淡粉 */
  --color-secondary: #A78BFA;      /* 淡紫 */
  --color-secondary-light: #DDD6FE;

  /* 中性色 */
  --bg: #FFFFFF;
  --bg-soft: #FFF5F7;              /* 柔和粉白 */
  --bg-card: rgba(255, 255, 255, 0.75);
  --bg-glass: rgba(255, 255, 255, 0.6);
  --text-primary: #1F2937;
  --text-secondary: #2C3E50;
  --text-muted: #6B7280;
  --heading: #111827;
  --border: rgba(209, 213, 219, 0.6);
  --border-soft: rgba(255, 182, 193, 0.3);

  /* 功能色 */
  --link: #1D4ED8;
  --link-hover: #D6336C;
  --btn-bg: var(--color-primary);
  --btn-text: #1F2937;
  --btn-hover: #FFA5B0;
  --footer-bg: #2C3E50;
  --footer-text: #E5E7EB;
  --footer-heading: #F9FAFB;

  /* 效果 */
  --shadow-sm: 0 2px 8px rgba(255, 182, 193, 0.12);
  --shadow-md: 0 8px 30px rgba(255, 182, 193, 0.18);
  --shadow-lg: 0 16px 40px rgba(214, 51, 108, 0.15);
  --blur: blur(16px);
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 32px;

  /* 导航 */
  --nav-bg: rgba(255, 255, 255, 0.75);
  --nav-border: rgba(255, 182, 193, 0.25);
}

/* 暗色模式 */
[data-theme="dark"] {
  --color-primary: #FF8FAB;
  --color-primary-light: #FFB3C6;
  --color-primary-dark: #FF5C8A;
  --color-accent: #3A1D2E;
  --color-secondary: #9F8BEF;
  --color-secondary-light: #6D5BB5;

  --bg: #0F0A12;
  --bg-soft: #1A1220;
  --bg-card: rgba(31, 25, 40, 0.8);
  --bg-glass: rgba(20, 15, 28, 0.6);
  --text-primary: #F3E8FF;
  --text-secondary: #E5D5F0;
  --text-muted: #B8A5C8;
  --heading: #FFFFFF;
  --border: rgba(139, 92, 246, 0.25);
  --border-soft: rgba(255, 143, 171, 0.2);

  --link: #A5B4FC;
  --link-hover: #FF8FAB;
  --btn-bg: var(--color-primary);
  --btn-text: #1A0F1E;
  --btn-hover: #FF6B9A;
  --footer-bg: #0B070E;
  --footer-text: #D1C4E0;
  --footer-heading: #F3E8FF;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.6);

  --nav-bg: rgba(15, 10, 18, 0.8);
  --nav-border: rgba(139, 92, 246, 0.2);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background-color: var(--bg);
  color: var(--text-primary);
  line-height: 1.7;
  transition: background-color 0.4s ease, color 0.4s ease;
  min-height: 100vh;
  overflow-x: hidden;
}

/* 背景装饰 */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(circle at 10% 20%, var(--color-primary-light) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, var(--color-secondary-light) 0%, transparent 35%),
    radial-gradient(circle at 70% 10%, var(--color-accent) 0%, transparent 30%);
  opacity: 0.12;
  pointer-events: none;
  z-index: -1;
}

/* ---------- 排版 ---------- */
h1, h2, h3, h4, h5, h6 {
  color: var(--heading);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 {
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  margin: 3rem 0 1.5rem;
  padding-left: 1.2rem;
  border-left: 6px solid var(--color-primary);
  border-radius: 0 8px 8px 0;
  background: linear-gradient(90deg, var(--color-accent), transparent);
  padding-top: 0.3rem;
  padding-bottom: 0.3rem;
}
h3 { font-size: clamp(1.2rem, 2.5vw, 1.5rem); margin: 1.8rem 0 0.8rem; }
h4 { font-size: 1.2rem; margin: 1.2rem 0 0.6rem; }

p { color: var(--text-primary); margin-bottom: 1rem; }

a {
  color: var(--link);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

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

a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width 0.3s ease;
}

a:hover::after {
  width: 100%;
}

/* 列表 */
ul, ol {
  padding-left: 1.5rem;
  margin: 1rem 0;
}

li {
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

/* ---------- 工具类 ---------- */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
}

.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-center { text-align: center; }

.bg-soft {
  background: var(--bg-soft);
  border-radius: var(--radius-md);
}

/* 毛玻璃卡片 */
.glass-card {
  background: var(--bg-glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

/* ---------- 导航栏 ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border-bottom: 1px solid var(--nav-border);
  box-shadow: var(--shadow-sm);
  transition: all 0.4s ease;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 24px;
  max-width: 1280px;
  margin: 0 auto;
  gap: 1rem;
}

.logo {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--heading);
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: transform 0.3s ease;
  cursor: pointer;
  white-space: nowrap;
}

.logo:hover {
  transform: scale(1.05);
}

.logo span {
  -webkit-text-fill-color: var(--color-primary-dark);
  font-size: 2rem;
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  color: var(--text-primary);
  font-weight: 600;
  padding: 0.4rem 0.2rem;
  border-bottom: 3px solid transparent;
  transition: all 0.3s ease;
  position: relative;
}

.nav-links a::after {
  display: none;
}

.nav-links a:hover,
.nav-links a.active {
  border-bottom-color: var(--color-primary);
  color: var(--color-primary-dark);
  transform: translateY(-2px);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

/* 搜索框 */
.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-soft);
  border: 1px solid var(--border-soft);
  border-radius: 50px;
  padding: 0.3rem 0.4rem 0.3rem 1rem;
  transition: all 0.3s ease;
  backdrop-filter: var(--blur);
}

.search-box:focus-within {
  box-shadow: 0 0 0 3px var(--color-primary-light);
  border-color: var(--color-primary);
}

.search-box input {
  border: none;
  background: transparent;
  color: var(--text-primary);
  padding: 0.4rem 0.6rem;
  width: 140px;
  outline: none;
  font-size: 0.95rem;
  transition: width 0.3s ease;
}

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

.search-box input:focus {
  width: 180px;
}

.search-box button {
  background: var(--btn-bg);
  color: var(--btn-text);
  border: none;
  border-radius: 50px;
  padding: 0.45rem 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 0.9rem;
}

.search-box button:hover {
  background: var(--btn-hover);
  transform: scale(1.05);
  box-shadow: 0 4px 15px var(--color-primary-light);
}

/* 主题切换 */
.theme-toggle {
  background: var(--bg-soft);
  border: 1px solid var(--border-soft);
  border-radius: 50px;
  padding: 0.45rem 1rem;
  color: var(--text-primary);
  cursor: pointer;
  font-weight: 600;
  transition: all 0.3s ease;
  backdrop-filter: var(--blur);
  font-size: 1rem;
}

.theme-toggle:hover {
  background: var(--color-accent);
  border-color: var(--color-primary);
  transform: rotate(15deg) scale(1.1);
  box-shadow: 0 4px 15px var(--color-primary-light);
}

/* 移动菜单按钮 */
.mobile-menu-btn {
  display: none;
  background: var(--bg-soft);
  border: 1px solid var(--border-soft);
  border-radius: 12px;
  padding: 0.4rem 0.8rem;
  font-size: 1.4rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.3s ease;
  line-height: 1;
}

.mobile-menu-btn:hover {
  background: var(--color-accent);
  border-color: var(--color-primary);
}

/* 移动导航 */
.mobile-nav {
  display: none;
  flex-direction: column;
  background: var(--bg-card);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--nav-border);
  animation: slideDown 0.3s ease;
}

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

.mobile-nav a {
  padding: 0.8rem 0.5rem;
  border-bottom: 1px solid var(--border-soft);
  color: var(--text-primary);
  font-weight: 600;
  transition: all 0.3s ease;
}

.mobile-nav a:last-child {
  border-bottom: none;
}

.mobile-nav a:hover {
  padding-left: 1rem;
  color: var(--color-primary-dark);
  background: var(--color-accent);
  border-radius: 8px;
}

.mobile-nav.show {
  display: flex;
}

/* 响应式导航 */
@media (max-width: 900px) {
  .nav-links {
    display: none;
  }
  .mobile-menu-btn {
    display: block;
  }
  .search-box input {
    width: 90px;
  }
  .search-box input:focus {
    width: 120px;
  }
  .nav-inner {
    padding: 0.6rem 16px;
  }
  .logo {
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  .search-box {
    display: none;
  }
  .nav-actions {
    gap: 0.4rem;
  }
  .theme-toggle {
    padding: 0.4rem 0.8rem;
    font-size: 0.9rem;
  }
}

/* ---------- Hero 首屏 ---------- */
.hero {
  background: linear-gradient(135deg, var(--bg-soft), var(--bg) 50%, var(--color-accent));
  padding: 4rem 0 5rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--color-primary-light), transparent 70%);
  opacity: 0.3;
  border-radius: 50%;
  animation: float 8s ease-in-out infinite;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--color-secondary-light), transparent 70%);
  opacity: 0.2;
  border-radius: 50%;
  animation: float 10s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-30px) scale(1.05); }
}

.hero-grid {
  display: flex;
  align-items: center;
  gap: 3rem;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

.hero-text {
  flex: 1 1 450px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  padding: 0.4rem 1.2rem;
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-md);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 var(--color-primary-light); }
  50% { box-shadow: 0 0 0 12px transparent; }
}

.hero-text h1 {
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  margin-bottom: 1.2rem;
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.hero-text p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  max-width: 600px;
  line-height: 1.8;
}

.btn-group {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  padding: 0.8rem 2rem;
  border-radius: 50px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: all 0.3s ease;
  font-size: 1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn::after {
  display: none;
}

.btn:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: var(--shadow-lg);
  color: #fff;
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--color-primary);
  color: var(--text-primary);
  box-shadow: none;
}

.btn-outline:hover {
  background: var(--color-accent);
  border-color: var(--color-primary-dark);
  color: var(--color-primary-dark);
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
}

.hero-svg {
  flex: 1 1 300px;
  text-align: center;
  position: relative;
}

.hero-svg svg {
  max-width: 100%;
  height: auto;
  filter: drop-shadow(0 20px 40px var(--color-primary-light));
  animation: floatY 4s ease-in-out infinite;
}

@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-15px); }
}

@media (max-width: 768px) {
  .hero {
    padding: 3rem 0;
  }
  .hero-grid {
    flex-direction: column-reverse;
    text-align: center;
    gap: 2rem;
  }
  .hero-text p {
    margin-left: auto;
    margin-right: auto;
  }
  .btn-group {
    justify-content: center;
  }
  .hero-svg svg {
    width: 200px;
  }
}

/* ---------- 卡片系统 ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.8rem;
  margin: 2.5rem 0;
}

.card {
  background: var(--bg-card);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 1.8rem;
  box-shadow: var(--shadow-sm);
  transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}

.card:hover::before {
  transform: scaleX(1);
}

.card h3 {
  font-size: 1.3rem;
  margin-bottom: 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card h3 .emoji {
  font-size: 1.6rem;
}

.card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* 卡片图标动画 */
.card:hover h3 .emoji {
  animation: bounce 0.6s ease;
}

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

/* ---------- 文章列表 ---------- */
.article-list {
  list-style: none;
  padding: 0;
}

.article-list li {
  border-bottom: 1px solid var(--border-soft);
  padding: 1.5rem 0;
  transition: all 0.3s ease;
  border-radius: 12px;
  padding-left: 1rem;
  padding-right: 1rem;
}

.article-list li:hover {
  background: var(--bg-soft);
  padding-left: 1.5rem;
  border-color: var(--color-primary-light);
}

.article-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--heading);
  display: block;
  margin-bottom: 0.5rem;
  transition: color 0.3s ease;
  cursor: pointer;
}

.article-title:hover {
  color: var(--color-primary-dark);
}

.article-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.8rem;
  display: flex;
  gap: 1rem;
  align-items: center;
}

.article-meta span {
  background: var(--color-accent);
  padding: 0.1rem 0.6rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary-dark);
}

.article-list li p {
  color: var(--text-secondary);
  margin-bottom: 0.8rem;
  font-size: 0.95rem;
}

.article-list li a {
  font-weight: 600;
  font-size: 0.9rem;
}

.article-list li a::after {
  display: none;
}

/* ---------- FAQ 手风琴 ---------- */
.faq-item {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
  background: var(--bg-card);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  overflow: hidden;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
}

.faq-item:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-md);
}

.faq-question {
  padding: 1.2rem 1.5rem;
  font-weight: 700;
  cursor: pointer;
  color: var(--heading);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.3s ease;
  background: linear-gradient(90deg, var(--bg-soft), transparent);
}

.faq-question:hover {
  color: var(--color-primary-dark);
  padding-left: 1.8rem;
}

.faq-question span {
  font-size: 1.2rem;
  transition: transform 0.3s ease;
  color: var(--color-primary);
  display: inline-block;
}

.faq-answer {
  padding: 0 1.5rem 1.2rem;
  color: var(--text-primary);
  display: none;
  line-height: 1.8;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-5px); }
  to { opacity: 1; transform: translateY(0); }
}

.faq-item.active {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

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

.faq-item.active .faq-question span {
  transform: rotate(180deg);
}

/* ---------- 表格 ---------- */
.info-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.info-table th,
.info-table td {
  border: 1px solid var(--border-soft);
  padding: 0.9rem 1rem;
  text-align: left;
}

.info-table th {
  background: var(--color-accent);
  color: var(--heading);
  font-weight: 700;
}

.info-table tr {
  transition: background 0.3s ease;
}

.info-table tr:hover {
  background: var(--bg-soft);
}

/* ---------- 页脚 ---------- */
footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 3.5rem 0 1.5rem;
  margin-top: 4rem;
  position: relative;
  overflow: hidden;
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary), var(--color-primary));
  background-size: 200% 100%;
  animation: gradientMove 3s ease infinite;
}

@keyframes gradientMove {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

footer a {
  color: var(--footer-text);
  transition: all 0.3s ease;
  display: inline-block;
  margin-bottom: 0.3rem;
}

footer a::after {
  display: none;
}

footer a:hover {
  color: var(--color-primary-light);
  transform: translateX(5px);
}

footer h4 {
  color: var(--footer-heading);
  margin-bottom: 1rem;
  font-size: 1.1rem;
  position: relative;
  padding-bottom: 0.5rem;
}

footer h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 3px;
  background: var(--color-primary);
  border-radius: 3px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 2.5rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  font-size: 0.9rem;
  color: var(--footer-text);
  text-align: center;
}

/* ---------- 返回顶部 ---------- */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  display: none;
  z-index: 100;
  transition: all 0.3s ease;
  animation: fadeInUp 0.5s ease;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.back-to-top:hover {
  transform: translateY(-5px) scale(1.1);
  box-shadow: 0 10px 40px var(--color-primary-dark);
}

/* ---------- 滚动动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

/* 延迟动画 */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

/* ---------- 图片占位 ---------- */
.svg-placeholder {
  background: var(--bg-soft);
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 300px;
  padding: 1rem;
}

/* ---------- 自定义列表 ---------- */
.custom-list {
  padding-left: 1.5rem;
  margin: 1rem 0;
}

.custom-list li {
  margin-bottom: 0.7rem;
  color: var(--text-primary);
  position: relative;
  padding-left: 0.5rem;
  transition: all 0.3s ease;
}

.custom-list li:hover {
  transform: translateX(5px);
  color: var(--color-primary-dark);
}

/* ---------- 友情链接 ---------- */
.friend-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
}

.friend-links a {
  background: var(--bg-soft);
  border: 1px solid var(--border-soft);
  padding: 0.5rem 1.2rem;
  border-radius: 50px;
  transition: all 0.3s ease;
  font-weight: 600;
}

.friend-links a::after {
  display: none;
}

.friend-links a:hover {
  background: var(--color-accent);
  border-color: var(--color-primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
}

/* ---------- 网站地图 ---------- */
.sitemap {
  columns: 3;
  max-width: 600px;
}

.sitemap a {
  display: block;
  margin-bottom: 0.5rem;
  transition: all 0.3s ease;
  color: var(--text-primary);
}

.sitemap a::after {
  display: none;
}

.sitemap a:hover {
  color: var(--color-primary-dark);
  padding-left: 8px;
}

@media (max-width: 768px) {
  .sitemap {
    columns: 2;
  }
}

/* ---------- 响应式调整 ---------- */
@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }

  h2 {
    padding-left: 0.8rem;
  }

  .card-grid {
    grid-template-columns: 1fr;
    gap: 1.2rem;
  }

  .card {
    padding: 1.4rem;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 0.95rem;
  }

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

  .btn {
    width: 100%;
    justify-content: center;
  }

  .btn-group {
    flex-direction: column;
  }

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

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    font-size: 1.2rem;
  }
}

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

::-webkit-scrollbar-track {
  background: var(--bg-soft);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: 10px;
  border: 2px solid var(--bg-soft);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-secondary));
}

/* ---------- 选中文字颜色 ---------- */
::selection {
  background: var(--color-primary);
  color: #fff;
}

/* ---------- 焦点可见性 ---------- */
:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---------- 减少动效偏好 ---------- */
@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;
  }
}

/* ---------- 打印样式 ---------- */
@media print {
  .navbar,
  .hero,
  .back-to-top,
  .theme-toggle,
  .search-box,
  .mobile-menu-btn,
  .mobile-nav {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  .container {
    max-width: 100%;
    padding: 0;
  }

  .card {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ccc;
  }

  footer {
    background: #fff;
    color: #000;
  }

  footer a {
    color: #000;
  }
}
```