```css
/* ============================================================
   糖豆视频 - 糖豆短视频，欢乐片段轻松看
   fimesf.cn
   完整样式表 | 响应式 | 暗色模式 | 毛玻璃 | 滚动动画
   ============================================================ */

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

:root {
  --primary: #ff6b35;
  --primary-dark: #e55a2b;
  --primary-light: #ff8c5f;
  --secondary: #ffb347;
  --accent: #ff4d6d;
  --bg: #ffffff;
  --bg-soft: #fef9f5;
  --bg-glass: rgba(255, 255, 255, 0.72);
  --bg-glass-strong: rgba(255, 255, 255, 0.88);
  --text: #2d2d2d;
  --text-light: #666666;
  --text-muted: #999999;
  --border: #f0e6e0;
  --border-glass: rgba(255, 255, 255, 0.5);
  --shadow: 0 4px 20px rgba(255, 107, 53, 0.08);
  --shadow-lg: 0 12px 40px rgba(255, 107, 53, 0.14);
  --shadow-glass: 0 8px 32px rgba(255, 107, 53, 0.12);
  --radius: 12px;
  --radius-lg: 20px;
  --radius-sm: 8px;
  --max-width: 1200px;
  --header-height: 64px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  --gradient-primary: linear-gradient(135deg, #ff6b35 0%, #ffb347 100%);
  --gradient-banner: linear-gradient(135deg, #fff5ef 0%, #ffe8dc 45%, #ffd9c7 100%);
  --gradient-soft: linear-gradient(135deg, #fff5ef 0%, #ffe8dc 100%);
}

[data-theme="dark"] {
  --bg: #1a1a1a;
  --bg-soft: #242424;
  --bg-glass: rgba(36, 36, 36, 0.72);
  --bg-glass-strong: rgba(36, 36, 36, 0.9);
  --text: #e8e8e8;
  --text-light: #aaaaaa;
  --text-muted: #777777;
  --border: #333333;
  --border-glass: rgba(255, 255, 255, 0.08);
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.45);
  --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.4);
  --gradient-banner: linear-gradient(135deg, #2a1f18 0%, #1f1712 45%, #2d1e14 100%);
  --gradient-soft: linear-gradient(135deg, #2a1f18 0%, #1f1712 100%);
}

/* ---------- 全局 ---------- */
html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial,
    sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  transition: background var(--transition), color var(--transition);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a:hover {
  color: var(--primary-dark);
}

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

ul,
ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  color: inherit;
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

::selection {
  background: rgba(255, 107, 53, 0.25);
  color: var(--text);
}

/* 滚动条美化 */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-soft);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 107, 53, 0.35);
  border-radius: 5px;
  border: 2px solid var(--bg-soft);
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 107, 53, 0.6);
}

/* ---------- 通用容器 ---------- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  width: 100%;
}

.section {
  padding: 72px 0;
  position: relative;
}

.section-title {
  font-size: 28px;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 12px;
  text-align: center;
  position: relative;
  padding-bottom: 18px;
  letter-spacing: 0.5px;
}

.section-title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 64px;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: 2px;
  box-shadow: 0 2px 10px rgba(255, 107, 53, 0.4);
}

.section-desc {
  text-align: center;
  color: var(--text-light);
  font-size: 15px;
  max-width: 700px;
  margin: 0 auto 44px;
  line-height: 1.8;
}

.section-subtitle {
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 16px;
}

/* ---------- 吸顶导航（毛玻璃） ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-glass);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition), background var(--transition),
    border-color var(--transition);
  height: var(--header-height);
}

.header.scrolled {
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
  background: var(--bg-glass-strong);
}

[data-theme="dark"] .header.scrolled {
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 20px;
  font-weight: 800;
  color: var(--primary);
  white-space: nowrap;
  transition: transform var(--transition);
}

.logo:hover {
  transform: scale(1.03);
  color: var(--primary);
}

.logo svg {
  width: 32px;
  height: 32px;
  transition: transform var(--transition);
}

.logo:hover svg {
  transform: rotate(-8deg) scale(1.08);
}

.nav {
  display: flex;
  gap: 4px;
  flex: 1;
  justify-content: center;
}

.nav a {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--text-light);
  font-weight: 500;
  transition: all var(--transition);
  white-space: nowrap;
  position: relative;
}

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

.nav a.active::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 2px;
  border-radius: 1px;
  background: var(--gradient-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* 搜索框（毛玻璃） */
.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-radius: 20px;
  padding: 6px 12px;
  gap: 6px;
  border: 1px solid var(--border);
  transition: border-color var(--transition), box-shadow var(--transition),
    background var(--transition);
}

.search-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.12);
}

.search-box input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 13px;
  color: var(--text);
  width: 120px;
  font-family: inherit;
}

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

.search-box svg {
  width: 16px;
  height: 16px;
  color: var(--text-light);
  flex-shrink: 0;
}

/* 主题/菜单按钮 */
.theme-toggle,
.menu-toggle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-soft);
  color: var(--text);
  transition: background var(--transition), transform var(--transition),
    color var(--transition);
}

.theme-toggle:hover,
.menu-toggle:hover {
  background: var(--border);
  transform: scale(1.08);
  color: var(--primary);
}

.theme-toggle:active,
.menu-toggle:active {
  transform: scale(0.94);
}

.theme-toggle svg,
.menu-toggle svg {
  width: 18px;
  height: 18px;
  transition: transform var(--transition);
}

[data-theme="dark"] .theme-toggle svg {
  transform: rotate(-20deg);
}

.menu-toggle {
  display: none;
}

/* 移动菜单（毛玻璃） */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  background: var(--bg-glass-strong);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 12px 20px;
  flex-direction: column;
  gap: 4px;
  z-index: 999;
  box-shadow: var(--shadow-lg);
  animation: menuSlide 0.3s ease;
}

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

.mobile-menu.open {
  display: flex;
}

.mobile-menu a {
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--text);
  font-size: 15px;
  transition: all var(--transition);
}

.mobile-menu a:hover {
  background: var(--bg-soft);
  color: var(--primary);
  padding-left: 18px;
}

/* ---------- Banner 渐变轮播 ---------- */
.banner {
  position: relative;
  overflow: hidden;
  background: var(--gradient-banner);
  border-radius: 0;
}

.banner::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(
    circle,
    rgba(255, 179, 71, 0.25) 0%,
    transparent 70%
  );
  border-radius: 50%;
  pointer-events: none;
}

.banner::after {
  content: "";
  position: absolute;
  bottom: -40%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(
    circle,
    rgba(255, 107, 53, 0.18) 0%,
    transparent 70%
  );
  border-radius: 50%;
  pointer-events: none;
}

.banner-track {
  display: flex;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

.banner-slide {
  min-width: 100%;
  padding: 56px 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
}

.banner-content {
  max-width: var(--max-width);
  width: 100%;
  display: flex;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
  justify-content: center;
}

.banner-text {
  flex: 1;
  min-width: 280px;
  animation: fadeUp 0.8s ease both;
}

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

.banner-tag {
  display: inline-block;
  background: var(--gradient-primary);
  color: #fff;
  padding: 5px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 18px;
  box-shadow: 0 4px 14px rgba(255, 107, 53, 0.3);
  letter-spacing: 0.5px;
}

.banner-text h1 {
  font-size: 38px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--text);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.banner-text h1 span {
  color: var(--primary);
  position: relative;
  display: inline-block;
}

.banner-text h1 span::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 0;
  right: 0;
  height: 8px;
  background: rgba(255, 179, 71, 0.35);
  border-radius: 4px;
  z-index: -1;
}

.banner-text p {
  font-size: 16px;
  color: var(--text-light);
  margin-bottom: 26px;
  max-width: 520px;
  line-height: 1.8;
}

.banner-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient-primary);
  color: #fff;
  padding: 13px 30px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 600;
  transition: all var(--transition);
  box-shadow: 0 6px 20px rgba(255, 107, 53, 0.35);
  position: relative;
  overflow: hidden;
}

.banner-cta::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.3),
    transparent
  );
  transition: left 0.5s ease;
}

.banner-cta:hover::before {
  left: 100%;
}

.banner-cta:hover {
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(255, 107, 53, 0.45);
}

.banner-cta:active {
  transform: translateY(-1px);
}

.banner-cta svg {
  width: 18px;
  height: 18px;
  transition: transform var(--transition);
}

.banner-cta:hover svg {
  transform: translateX(4px);
}

.banner-visual {
  flex: 0 0 280px;
  display: flex;
  justify-content: center;
  align-items: center;
  animation: floatY 4s ease-in-out infinite;
}

@keyframes floatY {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-12px);
  }
}

.banner-visual svg {
  width: 100%;
  max-width: 280px;
  filter: drop-shadow(0 12px 30px rgba(255, 107, 53, 0.2));
}

/* Banner 指示器 */
.banner-dots {
  position: absolute;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 10;
}

.banner-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 107, 53, 0.3);
  transition: all var(--transition);
  cursor: pointer;
  padding: 0;
}

.banner-dot:hover {
  background: rgba(255, 107, 53, 0.6);
}

.banner-dot.active {
  width: 26px;
  border-radius: 4px;
  background: var(--gradient-primary);
}

/* Banner 箭头（毛玻璃） */
.banner-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--bg-glass-strong);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transition: all var(--transition);
  color: var(--text);
  box-shadow: var(--shadow);
  border: 1px solid var(--border-glass);
}

.banner-arrow:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-50%) scale(1.1);
  box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
}

.banner-arrow.prev {
  left: 16px;
}

.banner-arrow.next {
  right: 16px;
}

.banner-arrow svg {
  width: 18px;
  height: 18px;
}

/* ---------- 核心数据 ---------- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 20px;
  margin-top: 40px;
}

.stat-card {
  text-align: center;
  padding: 32px 16px;
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition),
    border-color var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--transition);
}

.stat-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(255, 107, 53, 0.3);
}

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

.stat-number {
  font-size: 34px;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--primary);
  line-height: 1.2;
  letter-spacing: -1px;
}

.stat-label {
  font-size: 14px;
  color: var(--text-light);
  margin-top: 8px;
}

/* ---------- 品牌介绍 ---------- */
.brand-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.brand-intro-text h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 18px;
  color: var(--text);
  line-height: 1.4;
}

.brand-intro-text p {
  color: var(--text-light);
  margin-bottom: 14px;
  font-size: 15px;
  line-height: 1.85;
}

.brand-intro-visual {
  background: var(--gradient-soft);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 280px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.brand-intro-visual::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -20%;
  width: 200px;
  height: 200px;
  background: radial-gradient(
    circle,
    rgba(255, 107, 53, 0.15) 0%,
    transparent 70%
  );
  border-radius: 50%;
}

.brand-intro-visual svg {
  width: 100%;
  max-width: 320px;
  position: relative;
  z-index: 1;
  transition: transform var(--transition-slow);
}

.brand-intro-visual:hover svg {
  transform: scale(1.04) rotate(-1deg);
}

/* ---------- 产品优势 ---------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.feature-card {
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  border: 1px solid var(--border);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(255, 107, 53, 0.3);
}

.feature-card:hover::after {
  transform: scaleX(1);
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  color: #fff;
  box-shadow: 0 6px 18px rgba(255, 107, 53, 0.3);
  transition: transform var(--transition);
}

.feature-card:hover .feature-icon {
  transform: scale(1.1) rotate(-6deg);
}

.feature-icon svg {
  width: 24px;
  height: 24px;
}

.feature-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text);
}

.feature-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.75;
}

/* ---------- 解决方案 ---------- */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.solution-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.solution-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--gradient-primary);
  transform: scaleY(0.4);
  transform-origin: top;
  transition: transform var(--transition);
}

.solution-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateX(4px);
  border-color: rgba(255, 107, 53, 0.25);
}

.solution-card:hover::before {
  transform: scaleY(1);
}

.solution-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text);
  transition: color var(--transition);
}

.solution-card:hover h3 {
  color: var(--primary);
}

.solution-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.75;
}

/* ---------- 行业应用 ---------- */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-top: 40px;
}

.app-card {
  text-align: center;
  padding: 32px 18px;
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.app-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-6px);
}

.app-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 6px 18px rgba(255, 107, 53, 0.28);
  transition: transform var(--transition);
}

.app-card:hover .app-icon {
  transform: scale(1.12) rotate(6deg);
}

.app-icon svg {
  width: 26px;
  height: 26px;
}

.app-card h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.app-card p {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.7;
}

/* ---------- 客户案例 ---------- */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.case-card {
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.case-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-6px);
  border-color: rgba(255, 107, 53, 0.25);
}

.case-visual {
  height: 160px;
  background: var(--gradient-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.case-visual::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(
    circle,
    rgba(255, 107, 53, 0.12) 0%,
    transparent 60%
  );
  transition: transform var(--transition-slow);
}

.case-card:hover .case-visual::before {
  transform: scale(1.2);
}

.case-visual svg {
  width: 80px;
  height: 80px;
  opacity: 0.85;
  position: relative;
  z-index: 1;
  transition: transform var(--transition);
}

.case-card:hover .case-visual svg {
  transform: scale(1.1);
}

.case-body {
  padding: 22px;
}

.case-body h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text);
  transition: color var(--transition);
}

.case-card:hover .case-body h3 {
  color: var(--primary);
}

.case-body p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.75;
}

/* ---------- 客户评价 ---------- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.testimonial-card {
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 26px;
  transition: all var(--transition);
  position: relative;
}

.testimonial-card::before {
  content: "\201C";
  position: absolute;
  top: 8px;
  right: 20px;
  font-size: 64px;
  line-height: 1;
  color: rgba(255, 107, 53, 0.12);
  font-family: Georgia, serif;
  pointer-events: none;
}

.testimonial-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: rgba(255, 107, 53, 0.25);
}

.testimonial-stars {
  color: #ffb347;
  font-size: 16px;
  letter-spacing: 3px;
  margin-bottom: 14px;
}

.testimonial-text {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.85;
  margin-bottom: 18px;
  font-style: italic;
  position: relative;
  z-index: 1;
}

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

.testimonial-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 16px;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.28);
}

.testimonial-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.testimonial-role {
  font-size: 12px;
  color: var(--text-light);
}

/* ---------- 新闻中心 ---------- */
.news-list {
  display: grid;
  gap: 16px;
  margin-top: 40px;
}

.news-item {
  display: flex;
  gap: 20px;
  padding: 22px;
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: all var(--transition);
  align-items: flex-start;
}

.news-item:hover {
  border-color: rgba(255, 107, 53, 0.35);
  box-shadow: var(--shadow-lg);
  transform: translateX(4px);
}

.news-date {
  flex-shrink: 0;
  text-align: center;
  background: var(--bg);
  border-radius: 10px;
  padding: 10px 16px;
  border: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition);
}

.news-item:hover .news-date {
  background: var(--gradient-primary);
  border-color: transparent;
}

.news-date-day {
  font-size: 24px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  transition: color var(--transition);
}

.news-date-month {
  font-size: 12px;
  color: var(--text-light);
  margin-top: 4px;
  transition: color var(--transition);
}

.news-item:hover .news-date-day,
.news-item:hover .news-date-month {
  color: #fff;
}

.news-content h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
  line-height: 1.5;
  transition: color var(--transition);
}

.news-item:hover .news-content h3 {
  color: var(--primary);
}

.news-content p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.75;
}

.news-content .news-meta {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 10px;
}

/* ---------- 技术文章 ---------- */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.article-card {
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 26px;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.article-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.article-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: rgba(255, 107, 53, 0.3);
  transform: translateY(-4px);
}

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

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

.article-meta span {
  display: inline-flex;
  align-items: center;
}

.article-meta span:first-child::before {
  content: "";
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--primary);
  margin-right: 6px;
}

.article-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text);
  line-height: 1.5;
  transition: color var(--transition);
}

.article-card:hover h3 {
  color: var(--primary);
}

.article-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.75;
  flex: 1;
  margin-bottom: 16px;
}

.article-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition);
}

.article-link:hover {
  gap: 8px;
  color: var(--primary-dark);
}

.article-link svg {
  width: 14px;
  height: 14px;
  transition: transform var(--transition);
}

.article-link:hover svg {
  transform: translateX(2px);
}

/* ---------- FAQ ---------- */
.faq-list {
  max-width: 860px;
  margin: 40px auto 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.faq-item:hover {
  border-color: rgba(255, 107, 53, 0.3);
}

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

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  transition: color var(--transition);
}

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

.faq-icon {
  width: 26px;
  height: 26px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--border);
  transition: transform var(--transition), background var(--transition),
    color var(--transition), border-color var(--transition);
  color: var(--primary);
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: var(--gradient-primary);
  color: #fff;
  border-color: transparent;
}

.faq-icon svg {
  width: 14px;
  height: 14px;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-item.open .faq-answer {
  max-height: 600px;
}

.faq-answer-inner {
  padding: 0 22px 20px;
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.85;
}

/* ---------- HowTo ---------- */
.howto-steps {
  max-width: 860px;
  margin: 40px auto 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.howto-step {
  display: flex;
  gap: 20px;
  position: relative;
  padding-bottom: 32px;
}

.howto-step:last-child {
  padding-bottom: 0;
}

.howto-step:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 44px;
  bottom: 0;
  width: 2px;
  background: linear-gradient(
    180deg,
    var(--primary) 0%,
    var(--border) 100%
  );
}

.howto-num {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  font-weight: 700;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
  box-shadow: 0 4px 14px rgba(255, 107, 53, 0.3);
  transition: transform var(--transition);
}

.howto-step:hover .howto-num {
  transform: scale(1.12);
}

.howto-body h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
  transition: color var(--transition);
}

.howto-step:hover .howto-body h3 {
  color: var(--primary);
}

.howto-body p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.75;
}

/* ---------- 公司信息 ---------- */
.company-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.info-card {
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-lg);
  padding: 26px;
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.info-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: rgba(255, 107, 53, 0.25);
}

.info-card h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.info-card h3::before {
  content: "";
  width: 4px;
  height: 16px;
  border-radius: 2px;
  background: var(--gradient-primary);
}

.info-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.85;
}

/* ---------- 页脚 ---------- */
.footer {
  background: var(--bg-soft);
  border-top: 1px solid var(--border);
  padding: 56px 0 28px;
  margin-top: 40px;
  position: relative;
}

.footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  opacity: 0.6;
}

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

.footer-brand p {
  font-size: 14px;
  color: var(--text-light);
  margin-top: 14px;
  line-height: 1.85;
  max-width: 340px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text);
  position: relative;
  padding-bottom: 10px;
}

.footer-col h4::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 2px;
  border-radius: 1px;
  background: var(--gradient-primary);
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text-light);
  padding: 5px 0;
  transition: color var(--transition), padding-left var(--transition);
}

.footer-col a:hover {
  color: var(--primary);
  padding-left: 6px;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  color: var(--text-light);
}

.footer-bottom a {
  color: var(--text-light);
  transition: color var(--transition);
}

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

/* ---------- 返回顶部 ---------- */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 20px rgba(255, 107, 53, 0.35);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px) scale(0.9);
  transition: all var(--transition);
  z-index: 900;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.back-to-top:hover {
  transform: translateY(-4px) scale(1.06);
  box-shadow: 0 10px 28px rgba(255, 107, 53, 0.5);
}

.back-to-top:active {
  transform: translateY(-2px) scale(0.98);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
}

/* ---------- 滚动动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
    transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: opacity, transform;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
  will-change: auto;
}

/* 依次延迟 */
.reveal:nth-child(2) {
  transition-delay: 0.06s;
}
.reveal:nth-child(3) {
  transition-delay: 0.12s;
}
.reveal:nth-child(4) {
  transition-delay: 0.18s;
}
.reveal:nth-child(5) {
  transition-delay: 0.24s;
}
.reveal:nth-child(6) {
  transition-delay: 0.3s;
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  padding: 14px 0;
  font-size: 13px;
  color: var(--text-light);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
}

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

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

.breadcrumb span {
  margin: 0 8px;
  color: var(--text-muted);
}

/* ---------- 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;
  }

  .banner-visual {
    animation: none;
  }
}

/* ---------- 响应式 ---------- */
@media (max-width: 992px) {
  .nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .brand-intro {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .brand-intro-visual {
    order: -1;
  }

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

  .banner-text h1 {
    font-size: 32px;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 56px;
  }

  .section {
    padding: 48px 0;
  }

  .section-title {
    font-size: 22px;
    padding-bottom: 14px;
  }

  .section-title::after {
    width: 48px;
    height: 3px;
  }

  .section-desc {
    font-size: 14px;
    margin-bottom: 32px;
  }

  .banner-slide {
    padding: 40px 20px 56px;
  }

  .banner-text h1 {
    font-size: 26px;
  }

  .banner-text p {
    font-size: 15px;
  }

  .banner-visual {
    display: none;
  }

  .banner-arrow {
    display: none;
  }

  .banner-cta {
    padding: 11px 24px;
    font-size: 14px;
  }

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

  .news-item {
    flex-direction: column;
    gap: 14px;
    padding: 18px;
  }

  .news-date {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
  }

  .news-date-day {
    font-size: 18px;
  }

  .news-date-month {
    margin-top: 0;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 8px;
  }

  .faq-question {
    font-size: 14px;
    padding: 14px 16px;
  }

  .faq-answer-inner {
    padding: 0 16px 16px;
  }

  .howto-step {
    gap: 14px;
  }

  .howto-num {
    width: 34px;
    height: 34px;
    font-size: 14px;
  }

  .howto-step:not(:last-child)::before {
    left: 16px;
    top: 38px;
  }

  .stat-number {
    font-size: 28px;
  }

  .brand-intro-text h2 {
    font-size: 22px;
  }

  .back-to-top {
    bottom: 18px;
    right: 18px;
    width: 42px;
    height: 42px;
  }
}

@media (max-width: 480px) {
  .header-actions .search-box {
    display: none;
  }

  .container {
    padding: 0 16px;
  }

  .stat-number {
    font-size: 24px;
  }

  .stat-card {
    padding: 24px 12px;
  }

  .banner-text h1 {
    font-size: 22px;
  }

  .banner-tag {
    font-size: 12px;
    padding: 4px 12px;
  }

  .banner-dots {
    bottom: 14px;
  }

  .feature-card,
  .solution-card,
  .article-card,
  .info-card,
  .testimonial-card {
    padding: 22px 18px;
  }

  .articles-grid,
  .features-grid,
  .solutions-grid,
  .cases-grid,
  .testimonials-grid {
    gap: 16px;
  }

  .footer {
    padding: 40px 0 20px;
  }
}

/* ---------- 打印样式 ---------- */
@media print {
  .header,
  .mobile-menu,
  .banner-arrow,
  .banner-dots,
  .back-to-top,
  .theme-toggle,
  .menu-toggle,
  .search-box {
    display: none !important;
  }

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

  .section {
    padding: 24px 0;
  }

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

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