/* 思智网络 - 优化样式表 */

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

:root {
  /* 主题色 */
  --primary: #0b1220;
  --secondary: #14244a;
  --accent: #4ea2ff;
  --light: #0f182d;
  --dark: #b3c2e0;
  --darkest: #e6eefc;
  --border: rgba(78, 162, 255, 0.18);
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
  --radius: 14px;
  --radius-lg: 16px;

  /* 字体 */
  --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Source Han Sans CN', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-inter: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
}

body {
  font-family: var(--font-sans);
  background-color: var(--primary);
  line-height: 1.7;
  color: var(--dark);
}

/* 首页导航 - 科技感 (UPDATED) */
.navbar--tech {
  background: rgba(11, 18, 32, 0.78);
  border-bottom: 1px solid rgba(78, 162, 255, 0.12);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(12px);
}

.navbar--tech .site-logo {
  filter: drop-shadow(0 4px 10px rgba(11, 42, 107, 0.18));
}

.navbar--tech .nav-link {
  color: var(--darkest);
  letter-spacing: 0.01em;
}

.navbar--tech .nav-link::after {
  background: var(--accent);
  height: 2px;
  opacity: 0.9;
}

.navbar--tech .nav-link:hover,
.navbar--tech .nav-link.active {
  color: var(--accent);
}

.navbar--tech .nav-cta {
  background: linear-gradient(135deg, #2b6bff, #39d0ff);
  box-shadow: 0 18px 36px rgba(0, 0, 0, 0.35);
}

/* 首页导航交互风格 - 下划线条 (UPDATED) */
.nav-underline .nav-link {
  padding: 0.75rem 0.25rem;
  font-weight: 500;
  letter-spacing: 0.01em;
}

.nav-underline .nav-link::after {
  left: 50%;
  bottom: -0.9rem;
  width: 3.5rem;
  height: 3px;
  border-radius: 999px;
  background: var(--accent);
  transform: translateX(-50%) scaleX(0);
  transform-origin: center;
  opacity: 0;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-underline .nav-link:hover::after,
.nav-underline .nav-link.active::after {
  transform: translateX(-50%) scaleX(1);
  opacity: 1;
}

.nav-underline .nav-link:hover,
.nav-underline .nav-link.active {
  color: var(--primary);
}

/* 品牌 Logo */
.site-logo {
  display: block;
  height: 2.5rem;
  width: auto;
  max-width: 100%;
}

.site-logo--footer {
  height: 2.25rem;
}

/* 导航栏样式 */
.nav-link {
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary);
  transition: width 0.2s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* 移动端菜单 */
.mobile-menu {
  transform: translateX(-100%);
  transition: transform 0.3s ease;
}

.mobile-menu.active {
  transform: translateX(0);
}

/* 按钮 hover 效果 (UPDATED) */
.btn-hover {
  border-radius: var(--radius);
  box-shadow: 0 18px 36px rgba(0, 0, 0, 0.35);
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
}

.btn-hover:hover {
  transform: translateY(-2px);
  filter: brightness(1.02);
  box-shadow: 0 24px 52px rgba(0, 0, 0, 0.45);
}

/* 卡片 hover 效果 (UPDATED) */
.card-hover {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card-hover:hover {
  transform: translateY(-4px);
  box-shadow: 0 28px 60px rgba(0, 0, 0, 0.45);
}

/* 滚动动画 (UPDATED) */
.scroll-animate {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.4s cubic-bezier(0.2, 0, 0, 1), transform 0.4s cubic-bezier(0.2, 0, 0, 1);
}

.scroll-animate.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Tab 样式 */
.tab-button.active {
  background-color: var(--primary);
  color: white;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* Hero 背景网格 */
.hero-grid {
  background-image:
    radial-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px),
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 50px 50px, 70px 70px, 70px 70px;
}

/* 云厂商 Logo 悬停效果 */
.cloud-logo {
  transition: filter 0.2s, transform 0.2s;
}

.cloud-logo:hover {
  transform: scale(1.05);
  filter: grayscale(0);
}

/* 云厂商合作伙伴卡片 - 立体风格 */
.cloud-partner-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1rem;
  background: rgba(18, 28, 52, 0.92);
  border-radius: 1rem;
  border: 1px solid rgba(78, 162, 255, 0.18);
  box-shadow: 0 18px 36px rgba(0, 0, 0, 0.4);
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  min-width: 115px;
  overflow: hidden;
}

.cloud-partner-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 12%;
  right: 12%;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, transparent, rgba(78,162,255,0.6), transparent);
}

.cloud-partner-card:hover {
  transform: translateY(-6px) scale(1.01);
  box-shadow: 0 26px 50px rgba(0, 0, 0, 0.5);
}

.cloud-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 0.75rem;
  margin-bottom: 0.4rem;
  transition: all 0.3s ease;
  position: relative;
  z-index: 2;
}

.cloud-partner-card:hover .cloud-icon {
  transform: scale(1.1) rotate(5deg);
}

.cloud-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--darkest);
  margin-bottom: 0.2rem;
  position: relative;
  z-index: 2;
}

.cloud-slogan {
  font-size: 0.58rem;
  color: var(--dark);
  font-weight: 500;
  position: relative;
  z-index: 2;
  transition: all 0.3s ease;
}


.cloud-partner-card:hover .cloud-slogan {
  color: #d6e2ff;
}

.brand-glow {
  position: absolute;
  bottom: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 80%;
  border-radius: 50%;
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: 1;
  filter: blur(28px);
}

.cloud-partner-card:hover .brand-glow {
  opacity: 0.5;
}

/* 阿里云品牌色 */
.cloud-partner-card.ali-cloud .cloud-icon {
  background: linear-gradient(135deg, #ff6a00, #ff9500);
  color: white;
  box-shadow:
    0 4px 8px rgba(255, 106, 0, 0.3),
    inset 0 2px 4px rgba(255, 255, 255, 0.3);
}

.cloud-partner-card.ali-cloud:hover .cloud-name {
  color: #ff6a00;
}

.cloud-partner-card.ali-cloud .brand-glow {
  background: radial-gradient(circle, rgba(255, 106, 0, 0.6), transparent);
}

/* AWS 品牌色 */
.cloud-partner-card.aws .cloud-icon {
  background: linear-gradient(135deg, #232f3e, #37475a);
  color: #ff9900;
  box-shadow:
    0 4px 8px rgba(35, 47, 62, 0.4),
    inset 0 2px 4px rgba(255, 255, 255, 0.2);
}

.cloud-partner-card.aws:hover .cloud-name {
  color: #232f3e;
}

.cloud-partner-card.aws .brand-glow {
  background: radial-gradient(circle, rgba(255, 153, 0, 0.5), transparent);
}

/* 华为云品牌色 */
.cloud-partner-card.huawei-cloud .cloud-icon {
  background: linear-gradient(135deg, #cf0a2c, #e01e3c);
  color: white;
  box-shadow:
    0 4px 8px rgba(207, 10, 44, 0.35),
    inset 0 2px 4px rgba(255, 255, 255, 0.3);
}

.cloud-partner-card.huawei-cloud:hover .cloud-name {
  color: #cf0a2c;
}

.cloud-partner-card.huawei-cloud .brand-glow {
  background: radial-gradient(circle, rgba(207, 10, 44, 0.5), transparent);
}

/* 火山云品牌色 */
.cloud-partner-card.volcano-cloud .cloud-icon {
  background: linear-gradient(135deg, #333333, #1a1a1a);
  color: #ffffff;
  box-shadow:
    0 4px 8px rgba(51, 51, 51, 0.4),
    inset 0 2px 4px rgba(255, 255, 255, 0.2);
}

.cloud-partner-card.volcano-cloud:hover .cloud-name {
  color: #1a1a1a;
}

.cloud-partner-card.volcano-cloud .brand-glow {
  background: radial-gradient(circle, rgba(102, 102, 102, 0.5), transparent);
}

/* 天翼云品牌色 */
.cloud-partner-card.tianyi-cloud .cloud-icon {
  background: linear-gradient(135deg, #0066b3, #0088e6);
  color: white;
  box-shadow:
    0 4px 8px rgba(0, 102, 179, 0.35),
    inset 0 2px 4px rgba(255, 255, 255, 0.3);
}

.cloud-partner-card.tianyi-cloud:hover .cloud-name {
  color: #0066b3;
}

.cloud-partner-card.tianyi-cloud .brand-glow {
  background: radial-gradient(circle, rgba(0, 136, 230, 0.5), transparent);
}

/* 腾讯云品牌色 */
.cloud-partner-card.tencent-cloud .cloud-icon {
  background: linear-gradient(135deg, #00a4ff, #0078d4);
  color: white;
  box-shadow:
    0 4px 8px rgba(0, 164, 255, 0.35),
    inset 0 2px 4px rgba(255, 255, 255, 0.3);
}

.cloud-partner-card.tencent-cloud:hover .cloud-name {
  color: #00a4ff;
}

.cloud-partner-card.tencent-cloud .brand-glow {
  background: radial-gradient(circle, rgba(0, 164, 255, 0.5), transparent);
}

/* 数据数字动画 */
.counter {
  font-variant-numeric: tabular-nums;
}

/* 字间距 */
.tracking-widest {
  letter-spacing: 0.1em;
}

/* 工具类 - 替代 Tailwind 常用类 */
.container {
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
}

@media (min-width: 640px) {
  .container {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: 2rem;
    padding-right: 2rem;
  }
}

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

.hidden {
  display: none;
}

.block {
  display: block;
}

.inline-block {
  display: inline-block;
}

.flex {
  display: flex;
}

.grid {
  display: grid;
}

.items-center {
  align-items: center;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-4 {
  gap: 1rem;
}

.gap-8 {
  gap: 2rem;
}

.space-x-8 > * + * {
  margin-left: 2rem;
}

.fixed {
  position: fixed;
}

.relative {
  position: relative;
}

.top-0 {
  top: 0;
}

.left-0 {
  left: 0;
}

.right-0 {
  right: 0;
}

.z-50 {
  z-index: 50;
}

.w-6 {
  width: 1.5rem;
}

.h-6 {
  height: 1.5rem;
}

.text-white {
  color: white;
}

.text-primary {
  color: var(--primary);
}

.bg-primary {
  background-color: var(--primary);
}

.bg-accent {
  background-color: var(--accent);
}

.rounded-lg {
  border-radius: 0.5rem;
}

.rounded-md {
  border-radius: 0.375rem;
}

.px-4 {
  padding-left: 1rem;
  padding-right: 1rem;
}

.py-2 {
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
}

.py-3 {
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}

.px-6 {
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.py-4 {
  padding-top: 1rem;
  padding-bottom: 1rem;
}

.px-8 {
  padding-left: 2rem;
  padding-right: 2rem;
}

.font-medium {
  font-weight: 500;
}

.font-bold {
  font-weight: 700;
}

.text-center {
  text-align: center;
}

.transition-all {
  transition: all 0.3s;
}

.duration-300 {
  transition-duration: 300ms;
}

/* 响应式 */
@media (min-width: 768px) {
  .md\:block {
    display: block;
  }

  .md\:hidden {
    display: none;
  }

  .md\:flex {
    display: flex;
  }

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

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

  .md\:justify-start {
    justify-content: flex-start;
  }

  .md\:text-left {
    text-align: left;
  }
}

@media (max-width: 767px) {
  .md\:hidden {
    display: none;
  }
}

/* 更多工具类 */
.flex-1 { flex: 1; }
.inline-flex { display: inline-flex; }
.items-start { align-items: flex-start; }
.justify-end { justify-content: flex-end; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.flex-shrink-0 { flex-shrink: 0; }

.h-4 { height: 1rem; }
.h-5 { height: 1.25rem; }
.h-10 { height: 2.5rem; }
.h-12 { height: 3rem; }
.h-80 { height: 20rem; }
.min-h-screen { min-height: 100vh; }

.w-4 { width: 1rem; }
.w-5 { width: 1.25rem; }
.w-10 { width: 2.5rem; }
.w-12 { width: 3rem; }
.w-80 { width: 20rem; }
.w-full { width: 100%; }
.max-w-5xl { max-width: 64rem; }
.max-w-sm { max-width: 24rem; }

.m-0 { margin: 0; }
.m-1 { margin: 0.25rem; }
.m-2 { margin: 0.5rem; }
.m-3 { margin: 0.75rem; }
.m-4 { margin: 1rem; }

.mx-auto { margin-left: auto; margin-right: auto; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.mb-12 { margin-bottom: 3rem; }

.ml-1 { margin-left: 0.25rem; }
.ml-2 { margin-left: 0.5rem; }
.ml-3 { margin-left: 0.75rem; }

.mr-1 { margin-right: 0.25rem; }
.mr-2 { margin-right: 0.5rem; }
.mr-3 { margin-right: 0.75rem; }
.mr-4 { margin-right: 1rem; }

.mt-0\.5 { margin-top: 0.125rem; }
.mt-1 { margin-top: 0.25rem; }
.mt-4 { margin-top: 1rem; }

.p-0 { padding: 0; }
.p-3 { padding: 0.75rem; }
.p-4 { padding: 1rem; }
.p-6 { padding: 1.5rem; }
.p-8 { padding: 2rem; }

.px-3 { padding-left: 0.75rem; padding-right: 0.75rem; }
.px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }
.px-8 { padding-left: 2rem; padding-right: 2rem; }

.py-1 { padding-top: 0.25rem; padding-bottom: 0.25rem; }
.py-3 { padding-top: 0.75rem; padding-bottom: 0.75rem; }
.py-8 { padding-top: 2rem; padding-bottom: 2rem; }
.py-12 { padding-top: 3rem; padding-bottom: 3rem; }
.py-20 { padding-top: 5rem; padding-bottom: 5rem; }

.pt-20 { padding-top: 5rem; }
.pb-4 { padding-bottom: 1rem; }
.pb-8 { padding-bottom: 2rem; }

.text-xs { font-size: 0.75rem; }
.text-sm { font-size: 0.875rem; }
.text-base { font-size: 1rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }
.text-3xl { font-size: 1.875rem; }
.text-4xl { font-size: 2.25rem; }
.text-5xl { font-size: 3rem; }
.text-6xl { font-size: 3.75rem; }

.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.leading-tight { line-height: 1.25; }
.leading-relaxed { line-height: 1.625; }

.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

/* 颜色类 */
.text-white { color: white; }
.text-primary { color: var(--primary); }
.text-secondary { color: var(--secondary); }
.text-accent { color: var(--accent); }
.text-light { color: var(--light); }
.text-darkest { color: var(--darkest); }

.text-blue-200 { color: rgba(191, 219, 254, 0.9); }
.text-blue-300 { color: rgba(147, 197, 253, 0.9); }
.text-blue-400 { color: rgb(96, 165, 250); }
.text-blue-500 { color: rgb(59, 130, 246); }
.text-blue-600 { color: rgb(37, 99, 235); }
.text-blue-700 { color: rgb(29, 78, 216); }

.text-green-500 { color: rgb(34, 197, 94); }
.text-green-600 { color: rgb(22, 163, 74); }
.text-green-700 { color: rgb(21, 128, 61); }

.text-purple-400 { color: rgb(192, 132, 252); }
.text-purple-500 { color: rgb(168, 85, 247); }
.text-purple-600 { color: rgb(147, 51, 234); }

.text-pink-400 { color: rgb(244, 114, 182); }
.text-pink-500 { color: rgb(236, 72, 153); }

.text-orange-400 { color: rgb(251, 146, 60); }
.text-orange-500 { color: rgb(249, 115, 22); }
.text-orange-600 { color: rgb(234, 88, 12); }

.text-teal-400 { color: rgb(45, 212, 191); }
.text-teal-500 { color: rgb(20, 184, 166); }
.text-teal-600 { color: rgb(13, 148, 136); }

.text-red-500 { color: rgb(239, 68, 68); }
.text-red-600 { color: rgb(220, 38, 38); }

.text-yellow-500 { color: rgb(234, 179, 8); }
.text-yellow-600 { color: rgb(202, 138, 4); }

.text-gray-400 { color: rgb(156, 163, 175); }
.text-gray-500 { color: rgb(107, 114, 128); }
.text-gray-600 { color: rgb(75, 85, 99); }
.text-gray-700 { color: rgb(55, 65, 81); }
.text-gray-800 { color: rgb(31, 41, 55); }
.text-gray-900 { color: rgb(17, 24, 39); }

.bg-white { background-color: white; }
.bg-primary { background-color: var(--primary); }
.bg-secondary { background-color: var(--secondary); }
.bg-accent { background-color: var(--accent); }
.bg-light { background-color: var(--light); }
.bg-dark { background-color: var(--dark); }

.bg-blue-50 { background-color: rgba(239, 246, 255, 0.8); }
.bg-blue-100 { background-color: rgba(219, 234, 254, 0.8); }
.bg-blue-500 { background-color: rgb(59, 130, 246); }
.bg-blue-600 { background-color: rgb(37, 99, 235); }
.bg-blue-900\/50 { background-color: rgba(30, 58, 138, 0.5); }

.bg-green-50 { background-color: rgba(240, 253, 244, 0.8); }
.bg-green-100 { background-color: rgba(220, 252, 231, 0.8); }
.bg-green-500 { background-color: rgb(34, 197, 94); }
.bg-green-600 { background-color: rgb(22, 163, 74); }

.bg-purple-50 { background-color: rgba(250, 245, 255, 0.8); }
.bg-purple-100 { background-color: rgba(243, 232, 255, 0.8); }
.bg-purple-500 { background-color: rgb(168, 85, 247); }
.bg-purple-600 { background-color: rgb(147, 51, 234); }

.bg-pink-50 { background-color: rgba(253, 242, 248, 0.8); }
.bg-pink-500 { background-color: rgb(236, 72, 153); }

.bg-orange-50 { background-color: rgba(255, 247, 237, 0.8); }
.bg-orange-100 { background-color: rgba(255, 237, 213, 0.8); }
.bg-orange-500 { background-color: rgb(249, 115, 22); }
.bg-orange-600 { background-color: rgb(234, 88, 12); }

.bg-red-100 { background-color: rgba(254, 226, 226, 0.8); }

.bg-teal-50 { background-color: rgba(240, 253, 250, 0.8); }
.bg-teal-100 { background-color: rgba(204, 251, 241, 0.8); }
.bg-teal-500 { background-color: rgb(20, 184, 166); }

.bg-white\/95 { background-color: rgba(255, 255, 255, 0.95); }
.bg-white\/85 { background-color: rgba(255, 255, 255, 0.85); }
.bg-primary\/90 { background-color: rgba(11, 42, 107, 0.9); }
.bg-transparent { background-color: transparent; }

/* 渐变背景 */
.bg-gradient-to-b {
  background-image: linear-gradient(to bottom, var(--tw-gradient-stops));
}
.bg-gradient-to-br {
  background-image: linear-gradient(to bottom right, var(--tw-gradient-stops));
}
.bg-gradient-to-r {
  background-image: linear-gradient(to right, var(--tw-gradient-stops));
}

.from-white\/95 { --tw-gradient-from: rgba(255, 255, 255, 0.95); --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(255, 255, 255, 0)); }
.from-white { --tw-gradient-from: white; --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(255, 255, 255, 0)); }
.from-blue-50 { --tw-gradient-from: rgba(239, 246, 255, 0.9); --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(239, 246, 255, 0)); }
.from-purple-50 { --tw-gradient-from: rgba(250, 245, 255, 0.9); --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(250, 245, 255, 0)); }
.from-pink-50 { --tw-gradient-from: rgba(253, 242, 248, 0.9); --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(253, 242, 248, 0)); }
.from-orange-50 { --tw-gradient-from: rgba(255, 247, 237, 0.9); --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(255, 247, 237, 0)); }
.from-green-50 { --tw-gradient-from: rgba(240, 253, 244, 0.9); --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(240, 253, 244, 0)); }
.from-teal-50 { --tw-gradient-from: rgba(240, 253, 250, 0.9); --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(240, 253, 250, 0)); }

.from-blue-500 { --tw-gradient-from: rgb(59, 130, 246); --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(59, 130, 246, 0)); }
.from-purple-500 { --tw-gradient-from: rgb(168, 85, 247); --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(168, 85, 247, 0)); }
.from-pink-500 { --tw-gradient-from: rgb(236, 72, 153); --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(236, 72, 153, 0)); }
.from-orange-500 { --tw-gradient-from: rgb(249, 115, 22); --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(249, 115, 22, 0)); }
.from-green-500 { --tw-gradient-from: rgb(34, 197, 94); --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(34, 197, 94, 0)); }
.from-teal-500 { --tw-gradient-from: rgb(20, 184, 166); --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(20, 184, 166, 0)); }

.to-white\/85 { --tw-gradient-to: rgba(255, 255, 255, 0.85); }
.to-white { --tw-gradient-to: white; }
.to-light { --tw-gradient-to: #F5F7FA; }

.border { border-width: 1px; }
.border-0 { border-width: 0; }
.border-2 { border-width: 2px; }
.border-t { border-top-width: 1px; }
.border-l-4 { border-left-width: 4px; }

.border-primary { border-color: var(--primary); }
.border-white { border-color: white; }
.border-transparent { border-color: transparent; }
.border-gray-200 { border-color: rgb(229, 231, 235); }
.border-gray-700 { border-color: rgb(55, 65, 81); }
.border-blue-100 { border-color: rgba(219, 234, 254, 0.5); }
.border-blue-300 { border-color: rgba(147, 197, 253, 0.3); }
.border-purple-100 { border-color: rgba(243, 232, 255, 0.5); }
.border-pink-100 { border-color: rgba(252, 231, 243, 0.5); }
.border-orange-100 { border-color: rgba(255, 237, 213, 0.5); }
.border-green-100 { border-color: rgba(220, 252, 231, 0.5); }

.rounded { border-radius: 0.25rem; }
.rounded-md { border-radius: 0.375rem; }
.rounded-lg { border-radius: 0.5rem; }
.rounded-xl { border-radius: 0.75rem; }
.rounded-2xl { border-radius: 1rem; }
.rounded-full { border-radius: 9999px; }

.shadow { box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1); }
.shadow-md { box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1); }
.shadow-lg { box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1); }
.shadow-xl { box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1); }
.shadow-2xl { box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25); }

.backdrop-blur-sm { backdrop-filter: blur(4px); }

.overflow-y-auto { overflow-y: auto; }
.overflow-hidden { overflow: hidden; }

.grayscale { filter: grayscale(100%); }
.grayscale-0 { filter: grayscale(0%); }

/* 交互类 */
.focus\:outline-none:focus { outline: 2px solid transparent; outline-offset: 2px; }

.hover\:text-white:hover { color: white; }
.hover\:text-blue-300:hover { color: rgba(147, 197, 253, 0.9); }
.hover\:text-blue-500:hover { color: rgb(59, 130, 246); }
.hover\:text-blue-600:hover { color: rgb(37, 99, 235); }
.hover\:text-secondary:hover { color: var(--secondary); }
.hover\:text-orange-500:hover { color: rgb(249, 115, 22); }
.hover\:text-red-600:hover { color: rgb(220, 38, 38); }
.hover\:text-yellow-600:hover { color: rgb(202, 138, 4); }
.hover\:text-gray-800:hover { color: rgb(31, 41, 55); }
.hover\:text-gray-900:hover { color: rgb(17, 24, 39); }

.hover\:bg-white\/10:hover { background-color: rgba(255, 255, 255, 0.1); }
.hover\:bg-gray-50:hover { background-color: rgb(249, 250, 251); }

.hover\:grayscale-0:hover { filter: grayscale(0%); }

/* 滚动动画类 (UPDATED) */
.scroll-animate {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.4s cubic-bezier(0.2, 0, 0, 1), transform 0.4s cubic-bezier(0.2, 0, 0, 1);
}

.scroll-animate.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 响应式扩展 */
@media (min-width: 640px) {
  .sm\:px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }
  .sm\:flex-row { flex-direction: row; }
  .sm\:text-4xl { font-size: 2.25rem; }
  .sm\:text-center { text-align: center; }
}

@media (min-width: 768px) {
  .md\:block { display: block; }
  .md\:flex { display: flex; }
  .md\:grid { display: grid; }
  .md\:hidden { display: none; }
  .md\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
  .md\:gap-12 { gap: 3rem; }
  .md\:p-12 { padding: 3rem; }
  .md\:text-left { text-align: left; }
  .md\:text-4xl { font-size: 2.25rem; }
  .md\:text-5xl { font-size: 3rem; }
  .md\:justify-start { justify-content: flex-start; }
}

@media (min-width: 1024px) {
  .lg\:block { display: block; }
  .lg\:hidden { display: none; }
  .lg\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
  .lg\:grid-cols-5 { grid-template-columns: repeat(5, 1fr); }
  .lg\:px-8 { padding-left: 2rem; padding-right: 2rem; }
  .lg\:text-6xl { font-size: 3.75rem; }
}

@media (min-width: 1280px) {
  .xl\:text-7xl { font-size: 4.5rem; }
}