```css
/* ==========================================================================
   风车动漫 fengchedongmana.cn - 官方企业网站样式表
   风格：暖阳渐变 · 动漫活力 · 毛玻璃质感
   作者：风车动漫前端团队
   说明：纯 CSS，无外部依赖，支持暗色模式与响应式布局
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 颜色变量与主题令牌
   -------------------------------------------------------------------------- */
:root {
  --fc-primary: #e63946;
  --fc-primary-dark: #c92a37;
  --fc-primary-light: #ff6b75;
  --fc-accent: #ffd166;
  --fc-accent-2: #ff9f1c;
  --fc-mint: #2a9d8f;
  --fc-blue: #3a86ff;

  --fc-bg: #ffffff;
  --fc-bg-soft: #fafafa;
  --fc-bg-elev: #ffffff;
  --fc-bg-glass: rgba(255, 255, 255, 0.72);
  --fc-bg-glass-strong: rgba(255, 255, 255, 0.9);

  --fc-text: #222222;
  --fc-text-strong: #1a1a1a;
  --fc-text-soft: #555555;
  --fc-text-muted: #888888;
  --fc-text-faint: #999999;

  --fc-border: #eeeeee;
  --fc-border-soft: #f0f0f0;
  --fc-border-strong: #dddddd;

  --fc-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --fc-shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
  --fc-shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.1);
  --fc-shadow-glow: 0 10px 30px rgba(230, 57, 70, 0.22);

  --fc-radius-sm: 8px;
  --fc-radius-md: 14px;
  --fc-radius-lg: 20px;
  --fc-radius-pill: 999px;

  --fc-ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --fc-transition: 0.3s var(--fc-ease);
}

body.dark {
  --fc-bg: #14161a;
  --fc-bg-soft: #181b20;
  --fc-bg-elev: #1d2026;
  --fc-bg-glass: rgba(29, 32, 38, 0.72);
  --fc-bg-glass-strong: rgba(20, 22, 26, 0.9);

  --fc-text: #d8dbe0;
  --fc-text-strong: #ffffff;
  --fc-text-soft: #b8bcc4;
  --fc-text-muted: #9aa0a8;
  --fc-text-faint: #7d838c;

  --fc-border: #2a2e35;
  --fc-border-soft: #24272d;
  --fc-border-strong: #333842;

  --fc-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --fc-shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35);
  --fc-shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.45);
  --fc-shadow-glow: 0 10px 30px rgba(230, 57, 70, 0.35);
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
    "Hiragino Sans GB", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  color: var(--fc-text);
  background: var(--fc-bg);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background var(--fc-transition), color var(--fc-transition);
  overflow-x: hidden;
}

a {
  color: var(--fc-primary);
  text-decoration: none;
  transition: color var(--fc-transition);
}

a:hover {
  text-decoration: underline;
}

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

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
}

input,
textarea {
  font-family: inherit;
}

::selection {
  background: var(--fc-primary);
  color: #fff;
}

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

::-webkit-scrollbar-track {
  background: var(--fc-bg-soft);
}

::-webkit-scrollbar-thumb {
  background: var(--fc-border-strong);
  border-radius: var(--fc-radius-pill);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--fc-primary);
}

/* --------------------------------------------------------------------------
   3. 布局容器
   -------------------------------------------------------------------------- */
.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 无障碍跳转链接 */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--fc-primary);
  color: #fff;
  padding: 10px 16px;
  z-index: 9999;
  border-radius: 0 0 var(--fc-radius-sm) 0;
  font-weight: 600;
}

.skip-link:focus {
  left: 0;
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   4. 顶部导航 Header
   -------------------------------------------------------------------------- */
header.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--fc-bg-glass-strong);
  -webkit-backdrop-filter: blur(14px) saturate(180%);
  backdrop-filter: blur(14px) saturate(180%);
  border-bottom: 1px solid var(--fc-border);
  transition: box-shadow var(--fc-transition), background var(--fc-transition),
    border-color var(--fc-transition);
}

header.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

body.dark header.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 16px;
}

/* 品牌 Logo */
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 20px;
  color: var(--fc-primary);
  white-space: nowrap;
  letter-spacing: -0.3px;
  transition: transform var(--fc-transition);
}

.brand:hover {
  text-decoration: none;
  transform: scale(1.03);
}

.brand svg {
  width: 36px;
  height: 36px;
  flex: none;
  transition: transform 0.6s var(--fc-ease);
}

.brand:hover svg {
  transform: rotate(180deg);
}

/* 主导航 */
nav.main-nav ul {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}

nav.main-nav a {
  position: relative;
  color: var(--fc-text);
  font-size: 15px;
  font-weight: 500;
  padding: 4px 0;
  transition: color var(--fc-transition);
}

nav.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background: var(--fc-primary);
  border-radius: 2px;
  transition: width var(--fc-transition);
}

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

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

/* 导航工具区 */
.nav-tools {
  display: flex;
  align-items: center;
  gap: 10px;
}

.search-box {
  display: flex;
  align-items: center;
  border: 1px solid var(--fc-border-strong);
  border-radius: var(--fc-radius-pill);
  padding: 4px 6px 4px 14px;
  background: var(--fc-bg-soft);
  transition: border-color var(--fc-transition), box-shadow var(--fc-transition),
    background var(--fc-transition);
}

.search-box:focus-within {
  border-color: var(--fc-primary);
  box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.12);
  background: var(--fc-bg);
}

.search-box input {
  border: none;
  outline: none;
  background: transparent;
  width: 130px;
  font-size: 14px;
  color: inherit;
}

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

.search-box button {
  border: none;
  background: var(--fc-primary);
  color: #fff;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--fc-transition), background var(--fc-transition);
}

.search-box button:hover {
  background: var(--fc-primary-dark);
  transform: scale(1.08);
}

.icon-btn {
  border: 1px solid var(--fc-border-strong);
  background: var(--fc-bg-elev);
  border-radius: 50%;
  width: 38px;
  height: 38px;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--fc-text-soft);
  transition: transform var(--fc-transition), border-color var(--fc-transition),
    color var(--fc-transition), background var(--fc-transition);
}

.icon-btn:hover {
  border-color: var(--fc-primary);
  color: var(--fc-primary);
  transform: translateY(-2px);
}

.menu-toggle {
  display: none;
}

/* --------------------------------------------------------------------------
   5. Hero 渐变 Banner
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  background: linear-gradient(135deg, #fff5f5 0%, #ffe9d6 55%, #ffe0e3 100%);
  overflow: hidden;
  padding: 56px 0 48px;
}

.hero::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -100px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(255, 209, 102, 0.45), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  animation: floatBlob 12s ease-in-out infinite;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -160px;
  left: -120px;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(230, 57, 70, 0.18), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  animation: floatBlob 14s ease-in-out infinite reverse;
}

@keyframes floatBlob {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(24px, -24px) scale(1.08); }
}

body.dark .hero {
  background: linear-gradient(135deg, #1d2026 0%, #2a1f1a 55%, #241d20 100%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}

.hero h1 {
  font-size: 40px;
  line-height: 1.25;
  color: var(--fc-text-strong);
  margin-bottom: 18px;
  letter-spacing: -0.5px;
}

.hero h1 em {
  font-style: normal;
  color: var(--fc-primary);
  position: relative;
}

.hero h1 em::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  height: 8px;
  background: rgba(255, 209, 102, 0.55);
  border-radius: 4px;
  z-index: -1;
}

.hero .lead {
  font-size: 17px;
  color: var(--fc-text-soft);
  margin-bottom: 16px;
}

.hero .quick-answer {
  background: var(--fc-bg-glass-strong);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-left: 4px solid var(--fc-primary);
  padding: 14px 18px;
  border-radius: var(--fc-radius-sm);
  font-size: 15px;
  color: var(--fc-text);
  box-shadow: 0 6px 20px rgba(230, 57, 70, 0.1);
  margin-bottom: 22px;
}

.hero .quick-answer strong {
  color: var(--fc-primary);
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   6. 按钮
   -------------------------------------------------------------------------- */
.btn {
  display: inline-block;
  padding: 12px 26px;
  border-radius: var(--fc-radius-pill);
  font-weight: 600;
  font-size: 15px;
  border: 2px solid var(--fc-primary);
  cursor: pointer;
  text-align: center;
  transition: transform var(--fc-transition), box-shadow var(--fc-transition),
    background var(--fc-transition), color var(--fc-transition);
}

.btn-primary {
  background: linear-gradient(135deg, var(--fc-primary), var(--fc-primary-light));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 6px 18px rgba(230, 57, 70, 0.28);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--fc-shadow-glow);
  text-decoration: none;
  color: #fff;
}

.btn-ghost {
  background: transparent;
  color: var(--fc-primary);
}

.btn-ghost:hover {
  background: var(--fc-primary);
  color: #fff;
  text-decoration: none;
  transform: translateY(-3px);
  box-shadow: var(--fc-shadow-glow);
}

/* --------------------------------------------------------------------------
   7. Hero 轮播
   -------------------------------------------------------------------------- */
.hero-visual {
  position: relative;
}

.carousel {
  position: relative;
  border-radius: var(--fc-radius-lg);
  overflow: hidden;
  box-shadow: 0 16px 44px rgba(0, 0, 0, 0.12);
  background: var(--fc-bg-glass-strong);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.5);
}

body.dark .carousel {
  background: var(--fc-bg-glass);
  border-color: var(--fc-border);
}

.slide {
  display: none;
  padding: 28px;
}

.slide.active {
  display: block;
  animation: fadeIn 0.5s var(--fc-ease);
}

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

.slide h3 {
  font-size: 18px;
  margin-bottom: 6px;
  color: var(--fc-primary);
}

.slide p {
  font-size: 14px;
  color: var(--fc-text-soft);
}

.carousel-dots {
  display: flex;
  gap: 8px;
  justify-content: center;
  padding: 0 0 18px;
}

.carousel-dots button {
  width: 9px;
  height: 9px;
  border-radius: var(--fc-radius-pill);
  border: none;
  background: var(--fc-border-strong);
  padding: 0;
  transition: width var(--fc-transition), background var(--fc-transition);
}

.carousel-dots button.active {
  background: var(--fc-primary);
  width: 24px;
}

/* --------------------------------------------------------------------------
   8. 数据统计条
   -------------------------------------------------------------------------- */
.stats-bar {
  background: linear-gradient(135deg, #1a1a1a 0%, #2b1d1f 100%);
  color: #fff;
  padding: 28px 0;
}

body.dark .stats-bar {
  background: linear-gradient(135deg, #0e1013 0%, #1a1214 100%);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}

.stat-num {
  font-size: 32px;
  font-weight: 800;
  color: var(--fc-accent);
  line-height: 1.2;
  letter-spacing: -0.5px;
}

.stat-label {
  font-size: 14px;
  color: #bbb;
  margin-top: 4px;
}

/* --------------------------------------------------------------------------
   9. 面包屑
   -------------------------------------------------------------------------- */
.breadcrumb {
  font-size: 13px;
  color: var(--fc-text-muted);
  padding: 16px 0 0;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.breadcrumb li {
  display: flex;
  align-items: center;
}

.breadcrumb li::after {
  content: "›";
  margin-left: 6px;
  color: var(--fc-text-faint);
}

.breadcrumb li:last-child::after {
  content: "";
}

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

.breadcrumb a:hover {
  color: var(--fc-primary);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   10. 通用 Section
   -------------------------------------------------------------------------- */
section {
  padding: 60px 0;
  position: relative;
}

section:nth-of-type(even) {
  background: var(--fc-bg-soft);
}

.section-head {
  text-align: center;
  margin-bottom: 40px;
}

.section-head h2 {
  font-size: 30px;
  color: var(--fc-text-strong);
  margin-bottom: 10px;
  position: relative;
  display: inline-block;
  letter-spacing: -0.5px;
}

.section-head h2::after {
  content: "";
  display: block;
  width: 56px;
  height: 4px;
  background: linear-gradient(90deg, var(--fc-primary), var(--fc-accent-2));
  border-radius: 2px;
  margin: 14px auto 0;
}

.section-head p {
  color: var(--fc-text-muted);
  font-size: 15px;
  max-width: 720px;
  margin: 0 auto;
}

/* --------------------------------------------------------------------------
   11. 网格系统
   -------------------------------------------------------------------------- */
.grid-2,
.grid-3,
.grid-4 {
  display: grid;
  gap: 24px;
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

/* --------------------------------------------------------------------------
   12. 卡片
   -------------------------------------------------------------------------- */
.card {
  position: relative;
  background: var(--fc-bg-elev);
  border-radius: var(--fc-radius-md);
  padding: 26px;
  box-shadow: var(--fc-shadow-md);
  border: 1px solid var(--fc-border-soft);
  transition: transform var(--fc-transition), box-shadow var(--fc-transition),
    border-color var(--fc-transition);
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--fc-primary), var(--fc-accent-2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--fc-transition);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 40px rgba(230, 57, 70, 0.14);
  border-color: rgba(230, 57, 70, 0.25);
}

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

.card h3 {
  font-size: 18px;
  margin-bottom: 10px;
  color: var(--fc-text-strong);
}

.card p {
  font-size: 14px;
  color: var(--fc-text-soft);
  line-height: 1.8;
}

.card .icon {
  width: 52px;
  height: 52px;
  margin-bottom: 16px;
  border-radius: var(--fc-radius-sm);
  background: linear-gradient(135deg, #fff0f1, #ffe9d6);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--fc-transition);
}

body.dark .card .icon {
  background: linear-gradient(135deg, #2a1f22, #2a2418);
}

.card:hover .icon {
  transform: scale(1.08) rotate(-4deg);
}

/* --------------------------------------------------------------------------
   13. 文章列表
   -------------------------------------------------------------------------- */
.article-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.article-item {
  position: relative;
  background: var(--fc-bg-elev);
  border-radius: var(--fc-radius-md);
  padding: 24px;
  border: 1px solid var(--fc-border);
  transition: border-color var(--fc-transition), transform var(--fc-transition),
    box-shadow var(--fc-transition);
}

.article-item:hover {
  border-color: var(--fc-primary);
  transform: translateY(-4px);
  box-shadow: var(--fc-shadow-md);
}

.article-item h3 {
  font-size: 17px;
  margin-bottom: 10px;
  line-height: 1.5;
}

.article-item h3 a {
  color: var(--fc-text-strong);
  transition: color var(--fc-transition);
}

.article-item h3 a:hover {
  color: var(--fc-primary);
  text-decoration: none;
}

.article-meta {
  font-size: 12px;
  color: var(--fc-text-faint);
  margin-bottom: 12px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.article-summary {
  font-size: 14px;
  color: var(--fc-text-soft);
  margin-bottom: 14px;
  line-height: 1.8;
}

.read-more {
  font-size: 14px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--fc-transition), color var(--fc-transition);
}

.read-more:hover {
  gap: 10px;
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   14. FAQ 手风琴
   -------------------------------------------------------------------------- */
.faq-list {
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--fc-border);
  border-radius: var(--fc-radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
  background: var(--fc-bg-elev);
  transition: border-color var(--fc-transition), box-shadow var(--fc-transition);
}

.faq-item:hover {
  border-color: rgba(230, 57, 70, 0.4);
}

.faq-item.open {
  border-color: var(--fc-primary);
  box-shadow: 0 6px 20px rgba(230, 57, 70, 0.1);
}

.faq-q {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 18px 22px;
  font-size: 16px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--fc-text-strong);
  gap: 12px;
  transition: color var(--fc-transition);
}

.faq-q:hover {
  color: var(--fc-primary);
}

.faq-q .arrow {
  transition: transform var(--fc-transition);
  color: var(--fc-primary);
  flex: none;
  font-size: 14px;
}

.faq-item.open .faq-q .arrow {
  transform: rotate(180deg);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--fc-ease), padding var(--fc-transition);
  padding: 0 22px;
}

.faq-item.open .faq-a {
  max-height: 800px;
  padding: 0 22px 20px;
}

.faq-a p {
  font-size: 14px;
  color: var(--fc-text-soft);
  line-height: 1.85;
}

/* --------------------------------------------------------------------------
   15. HowTo 步骤
   -------------------------------------------------------------------------- */
.howto-steps {
  counter-reset: step;
  max-width: 900px;
  margin: 0 auto;
}

.howto-step {
  position: relative;
  padding: 0 0 30px 64px;
  border-left: 2px dashed rgba(230, 57, 70, 0.35);
}

.howto-step:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.howto-step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: -22px;
  top: 0;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--fc-primary), var(--fc-primary-light));
  color: #fff;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  box-shadow: 0 4px 12px rgba(230, 57, 70, 0.3);
  transition: transform var(--fc-transition);
}

.howto-step:hover::before {
  transform: scale(1.1);
}

.howto-step h3 {
  font-size: 17px;
  margin-bottom: 6px;
  color: var(--fc-text-strong);
}

.howto-step p {
  font-size: 14px;
  color: var(--fc-text-soft);
  line-height: 1.8;
}

/* --------------------------------------------------------------------------
   16. 客户评价
   -------------------------------------------------------------------------- */
.testimonial {
  position: relative;
  background: var(--fc-bg-elev);
  border-radius: var(--fc-radius-md);
  padding: 26px;
  border: 1px solid var(--fc-border);
  transition: transform var(--fc-transition), box-shadow var(--fc-transition);
}

.testimonial::before {
  content: "\201C";
  position: absolute;
  top: 8px;
  right: 20px;
  font-size: 64px;
  line-height: 1;
  color: rgba(230, 57, 70, 0.12);
  font-family: Georgia, serif;
}

.testimonial:hover {
  transform: translateY(-4px);
  box-shadow: var(--fc-shadow-md);
}

.testimonial .quote {
  font-size: 15px;
  color: var(--fc-text-soft);
  margin-bottom: 18px;
  font-style: italic;
  line-height: 1.85;
  position: relative;
  z-index: 1;
}

.testimonial .who {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial .avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  overflow: hidden;
  flex: none;
  border: 2px solid var(--fc-bg);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.testimonial .who strong {
  display: block;
  font-size: 14px;
  color: var(--fc-text-strong);
}

.testimonial .who span {
  font-size: 12px;
  color: var(--fc-text-faint);
}

/* --------------------------------------------------------------------------
   17. 联系区
   -------------------------------------------------------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.contact-info {
  background: var(--fc-bg-elev);
  border-radius: var(--fc-radius-md);
  padding: 28px;
  border: 1px solid var(--fc-border);
}

.contact-info dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px 18px;
  font-size: 15px;
}

.contact-info dt {
  font-weight: 600;
  color: var(--fc-text-strong);
  white-space: nowrap;
}

.contact-info dd {
  color: var(--fc-text-soft);
}

.contact-form {
  background: var(--fc-bg-elev);
  border-radius: var(--fc-radius-md);
  padding: 28px;
  border: 1px solid var(--fc-border);
  transition: box-shadow var(--fc-transition);
}

.contact-form:focus-within {
  box-shadow: var(--fc-shadow-md);
}

.contact-form label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--fc-text);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--fc-border-strong);
  border-radius: var(--fc-radius-sm);
  font-size: 14px;
  margin-bottom: 16px;
  background: var(--fc-bg-soft);
  color: inherit;
  transition: border-color var(--fc-transition), box-shadow var(--fc-transition),
    background var(--fc-transition);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--fc-primary);
  box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.12);
  background: var(--fc-bg);
}

.contact-form textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-form .btn {
  width: 100%;
}

/* --------------------------------------------------------------------------
   18. 团队卡片
   -------------------------------------------------------------------------- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.team-card {
  text-align: center;
  background: var(--fc-bg-elev);
  border-radius: var(--fc-radius-md);
  padding: 26px 16px;
  border: 1px solid var(--fc-border);
  transition: transform var(--fc-transition), box-shadow var(--fc-transition);
}

.team-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--fc-shadow-md);
}

.team-card .avatar {
  width: 72px;
  height: 72px;
  margin: 0 auto 14px;
  border-radius: 50%;
  overflow: hidden;
  transition: transform var(--fc-transition);
}

.team-card:hover .avatar {
  transform: scale(1.08);
}

.team-card h3 {
  font-size: 16px;
  margin-bottom: 4px;
  color: var(--fc-text-strong);
}

.team-card p {
  font-size: 13px;
  color: var(--fc-text-muted);
}

/* --------------------------------------------------------------------------
   19. 信任徽章 / 友情链接
   -------------------------------------------------------------------------- */
.trust-badges {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 28px;
}

.badge {
  background: var(--fc-bg-elev);
  border: 1px solid var(--fc-border);
  border-radius: var(--fc-radius-pill);
  padding: 10px 20px;
  font-size: 13px;
  color: var(--fc-text-soft);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: transform var(--fc-transition), border-color var(--fc-transition),
    color var(--fc-transition);
}

.badge:hover {
  transform: translateY(-3px);
  border-color: var(--fc-primary);
  color: var(--fc-primary);
  text-decoration: none;
}

.badge svg {
  width: 18px;
  height: 18px;
  flex: none;
}

/* --------------------------------------------------------------------------
   20. 滚动动画
   -------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--fc-ease), transform 0.7s var(--fc-ease);
  will-change: opacity, transform;
}

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

/* --------------------------------------------------------------------------
   21. 长文排版 Prose
   -------------------------------------------------------------------------- */
.prose {
  max-width: 900px;
  margin: 0 auto;
  font-size: 15px;
  color: var(--fc-text);
  line-height: 1.9;
}

.prose h2 {
  font-size: 24px;
  margin: 40px 0 16px;
  color: var(--fc-text-strong);
  padding-left: 14px;
  border-left: 4px solid var(--fc-primary);
  line-height: 1.4;
}

.prose h2:first-child {
  margin-top: 0;
}

.prose h3 {
  font-size: 18px;
  margin: 28px 0 12px;
  color: var(--fc-text-strong);
}

.prose h4 {
  font-size: 16px;
  margin: 20px 0 8px;
  color: var(--fc-text);
}

.prose p {
  margin-bottom: 16px;
}

.prose ul,
.prose ol {
  margin: 0 0 18px 22px;
  list-style: disc;
}

.prose ol {
  list-style: decimal;
}

.prose li {
  margin-bottom: 8px;
}

/* 提示框 */
.notice {
  background: #fff8e6;
  border-left: 4px solid #ffb703;
  padding: 14px 18px;
  border-radius: var(--fc-radius-sm);
  font-size: 14px;
  margin: 20px 0;
  color: #6b5a1e;
}

body.dark .notice {
  background: #2a2418;
  color: #d8c98a;
}

/* 标签 */
.tag {
  display: inline-block;
  background: #fff0f1;
  color: var(--fc-primary);
  font-size: 12px;
  padding: 3px 12px;
  border-radius: var(--fc-radius-pill);
  margin: 0 6px 6px 0;
  transition: background var(--fc-transition), color var(--fc-transition);
}

.tag:hover {
  background: var(--fc-primary);
  color: #fff;
}

body.dark .tag {
  background: #2a1f22;
}

/* 目录 */
.toc {
  background: var(--fc-bg-elev);
  border-radius: var(--fc-radius-md);
  padding: 22px 26px;
  border: 1px solid var(--fc-border);
  margin-bottom: 32px;
}

.toc h2 {
  font-size: 16px;
  margin-bottom: 14px;
  color: var(--fc-text-strong);
}

.toc ol {
  padding-left: 20px;
  font-size: 14px;
  columns: 2;
  column-gap: 32px;
  list-style: decimal;
}

.toc a {
  color: var(--fc-text-soft);
}

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

/* --------------------------------------------------------------------------
   22. 页脚 Footer
   -------------------------------------------------------------------------- */
footer.site-footer {
  background: linear-gradient(180deg, #1a1a1a 0%, #141414 100%);
  color: #aaa;
  padding: 52px 0 26px;
  font-size: 14px;
}

body.dark footer.site-footer {
  background: linear-gradient(180deg, #0e1013 0%, #0a0c0e 100%);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 36px;
}

footer.site-footer h4 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 10px;
}

footer.site-footer h4::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 28px;
  height: 2px;
  background: var(--fc-primary);
  border-radius: 2px;
}

footer.site-footer ul {
  list-style: none;
}

footer.site-footer li {
  margin-bottom: 10px;
}

footer.site-footer a {
  color: #aaa;
  transition: color var(--fc-transition), padding-left var(--fc-transition);
}

footer.site-footer a:hover {
  color: var(--fc-accent);
  text-decoration: none;
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid #2a2a2a;
  padding-top: 22px;
  text-align: center;
  font-size: 13px;
  color: #777;
  line-height: 2;
}

.footer-bottom a {
  color: #999;
}

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

/* --------------------------------------------------------------------------
   23. 返回顶部
   -------------------------------------------------------------------------- */
.back-to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--fc-primary), var(--fc-primary-light));
  color: #fff;
  border: none;
  font-size: 20px;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 22px rgba(230, 57, 70, 0.42);
  z-index: 999;
  transition: transform var(--fc-transition), box-shadow var(--fc-transition);
}

.back-to-top.show {
  display: flex;
  animation: popIn 0.3s var(--fc-ease);
}

@keyframes popIn {
  from {
    opacity: 0;
    transform: scale(0.6);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(230, 57, 70, 0.55);
}

/* --------------------------------------------------------------------------
   24. 响应式 - 平板
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero h1 {
    font-size: 34px;
  }

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

/* --------------------------------------------------------------------------
   25. 响应式 - 移动端导航
   -------------------------------------------------------------------------- */
@media (max-width: 900px) {
  nav.main-nav {
    display: none;
  }

  nav.main-nav.open {
    display: block;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--fc-bg-glass-strong);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--fc-border);
    padding: 12px 20px 16px;
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.1);
    animation: slideDown 0.3s var(--fc-ease);
  }

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

  nav.main-nav.open ul {
    flex-direction: column;
    gap: 4px;
  }

  nav.main-nav.open a {
    display: block;
    padding: 11px 0;
    border-bottom: 1px solid var(--fc-border-soft);
  }

  nav.main-nav.open a::after {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .search-box input {
    width: 90px;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .hero h1 {
    font-size: 30px;
  }

  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .team-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

/* --------------------------------------------------------------------------
   26. 响应式 - 小屏手机
   -------------------------------------------------------------------------- */
@media (max-width: 700px) {
  section {
    padding: 44px 0;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .stat-num {
    font-size: 26px;
  }

  .section-head h2 {
    font-size: 24px;
  }

  .article-list {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 600px) {
  body {
    font-size: 15px;
  }

  .container {
    padding: 0 16px;
  }

  .hero {
    padding: 40px 0 36px;
  }

  .hero h1 {
    font-size: 26px;
  }

  .hero .lead {
    font-size: 15px;
  }

  .hero .quick-answer {
    font-size: 14px;
    padding: 12px 14px;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .toc ol {
    columns: 1;
  }

  .contact-info dl {
    grid-template-columns: 1fr;
    gap: 4px 0;
  }

  .contact-info dt {
    margin-top: 10px;
  }

  .howto-step {
    padding-left: 52px;
  }

  .howto-step::before {
    width: 36px;
    height: 36px;
    left: -19px;
    font-size: 14px;
  }

  .faq-q {
    padding: 16px 18px;
    font-size: 15px;
  }

  .faq-item.open .faq-a {
    padding: 0 18px 16px;
  }

  .back-to-top {
    right: 16px;
    bottom: 16px;
    width: 44px;
    height: 44px;
  }
}

@media (max-width: 520px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

  .trust-badges {
    gap: 10px;
  }

  .badge {
    padding: 8px 16px;
    font-size: 12px;
  }

  .search-box {
    display: none;
  }
}

/* --------------------------------------------------------------------------
   27. 无障碍与动效偏好
   -------------------------------------------------------------------------- */
@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;
  }

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

/* 焦点可见性 */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--fc-primary);
  outline-offset: 3px;
  border-radius: 4px;
}

/* 打印样式 */
@media print {
  header.site-header,
  .back-to-top,
  .hero-visual,
  .stats-bar,
  footer.site-footer {
    display: none !important;
  }

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

  section {
    padding: 20px 0;
    page-break-inside: avoid;
  }

  a {
    color: #000;
    text-decoration: underline;
  }
}
```