html {
  scroll-behavior: smooth;
  /* 点击锚点时平滑滚动 */
}


/* 颜色与全局设置 */
:root {
  --color-bg: #050816;
  --color-bg-alt: #0b1020;
  --color-surface: #111827;
  --color-surface-alt: #f9fafb;
  --color-primary: #fbbf24;
  /* 金色 */
  --color-primary-soft: rgba(251, 191, 36, 0.15);
  --color-text-main: #f9fafb;
  --color-text-muted: #9ca3af;
  --color-text-dark: #111827;
  --max-width: 1120px;
}

.section-title {
  color: var(--color-text-main);
}

.step-card h3 {
  color: var(--color-text-main);
}

.service-card h3 {
  color: var(--color-text-main);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  color: var(--color-text);
  background:
    /*radial-gradient(circle at 0% 0%, rgba(56, 189, 248, 0.12), transparent 55%),
              /*linear-gradient(to bottom, #0e1a32 0%, #050c1e 60%, #000009 100%);*/
    #0a0f1f
}

body {
    color: #dbe2f2;
}
/* 深色背景下的常规正文（案例页、技术文章） */
.section p,
.section li {
    color: rgba(219, 226, 242, 0.78);  /* #dbe2f2 带一点透明度 */
}


/* 容器与基础布局 */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* 导航栏 */
.site-header {
  position: relative;
  /* ⚠ 关键：给伪元素当定位参照 */
  overflow: hidden;
  /* 避免高光条跑出导航外 */
  top: 0;
  z-index: 50;
  backdrop-filter: blur(16px);
  background: linear-gradient(to bottom, rgba(2, 6, 23, 0.96), rgba(2, 6, 23, 0.75));
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
}

/* 顶部导航的金属反光动画层 */
.site-header::before {
  content: "";
  position: absolute;
  inset: 0;

  /* 一条斜向的高光带，从透明渐变到亮再回到透明 */
  background: linear-gradient(120deg,
      transparent 0%,
      rgba(255, 255, 255, 0.12) 40%,
      rgba(255, 255, 255, 0.40) 50%,
      rgba(255, 255, 255, 0.12) 60%,
      transparent 100%);

  /* 起始时先放在左侧外一点 */
  transform: translateX(-60%);
  opacity: 0.6;
  /* 整体亮度，觉得太亮可以调低到 0.25 左右 */
  mix-blend-mode: screen;
  /* 和下面的深蓝做叠加，变成金属感 */

  pointer-events: none;
  /* 不挡住导航的鼠标操作 */

  animation: nav-shine 8s linear infinite;
}

/* 高光从左到右缓慢滑动的动画 */
@keyframes nav-shine {
  0% {
    transform: translateX(-60%);
  }

  100% {
    transform: translateX(60%);
  }
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
}

/* 图片 logo */
.logo-img {
  height: 36px;
  /* 可以根据效果再调 32~40px */
  width: auto;
  display: block;
  filter: drop-shadow(0 0 4px rgba(0, 0, 0, 0.4));
}

/* 右边文字“ A U G P U . A I ” */
.logo-text {
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  color: #f9f4b4;
  /* 之前统一的浅金色 */
}

/* Header 收紧状态（滚动一定距离后） */
.site-header.compact {
  background: rgba(2, 6, 23, 0.98);
  border-bottom-color: rgba(148, 163, 184, 0.35);
}

.site-header.compact .nav-container {
  padding-top: 0.4rem;
  padding-bottom: 0.4rem;
}

.site-header,
.nav-container {
  transition: padding 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-mark {
  width: 28px;
  height: 28px;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 20%, #fbbf24, #f97316);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #111827;
  font-size: 0.9rem;
}

.logo-text {
  font-weight: 600;
  letter-spacing: 0.08em;
  font-size: 0.95rem;
  text-transform: uppercase;
  color: #f9fabf !important;
}

/* 顶部导航容器（你如果已经写过 display:flex 可以保留原来的） */
.main-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

/* 基础状态：所有导航文字 */
.main-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;

  padding: 0.25rem 0.9rem;
  font-size: 0.94rem;
  font-weight: 500;
  letter-spacing: 0.03em;

  color: rgba(248, 250, 252, 0.78);
  /* 比之前亮一点 */
  text-decoration: none;

  transition:
    color 0.15s ease-out,
    opacity 0.15s ease-out;
}

/* hover 状态：变金色一点 */
.main-nav a:hover {
  color: #fbbf24;
  opacity: 1;
}

/* 当前激活菜单（加了 class="is-active" 的那一个） */
.main-nav a.is-active {
  color: #fbbf24;
}

/* 底部金色小光带，用来突出 hover / active */
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0.7rem;
  right: 0.7rem;
  bottom: -0.4rem;
  height: 2px;

  background: linear-gradient(90deg,
      transparent,
      rgba(251, 191, 36, 0.95),
      transparent);
  box-shadow: 0 0 8px rgba(251, 191, 36, 0.75);

  opacity: 0;
  transform: scaleX(0.6);
  transform-origin: center;
  transition:
    opacity 0.18s ease-out,
    transform 0.18s ease-out;
}

/* hover & active 时显示小光带 */
.main-nav a:hover::after,
.main-nav a.is-active::after {
  opacity: 1;
  transform: scaleX(1);
}


.header-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* 汉堡菜单按钮（桌面端隐藏，手机端显示） */
.nav-toggle {
  display: none;
  /* 默认不显示，移动端再打开 */
  width: 34px;
  height: 34px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: rgba(15, 23, 42, 0.9);
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.nav-toggle-line {
  width: 16px;
  height: 2px;
  border-radius: 999px;
  background: rgba(248, 250, 252, 0.9);
  transition: transform 0.2s ease, opacity 0.2s ease, background-color 0.2s ease;
}

/* 打开状态下的 X 形态 */
.nav-toggle.is-open .nav-toggle-line:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}

.nav-toggle.is-open .nav-toggle-line:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-open .nav-toggle-line:nth-child(3) {
  transform: translateY(-4px) rotate(-45deg);
}

.main-nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  padding: 0.25rem 0.4rem;
  border-radius: 999px;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.main-nav a:hover {
  color: var(--color-text-main);
  background-color: rgba(148, 163, 184, 0.2);
}

/* Hero 区域 */
.hero {
  position: relative;
  padding: 4.5rem 0 4rem;
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at top left, rgba(59, 130, 246, 0.35), transparent 55%),
    radial-gradient(circle at right, rgba(134, 107, 25, 0.281), transparent 60%);
  mix-blend-mode: screen;
  pointer-events: none;
}

.hero-canvas-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  /* 在文字下面，在背景上面 */
}

/* 现在先留空，未来可以放：canvas / video / WebGL */

/* ===== HERO 动画背景层 ===== */
#hero {
  position: relative;
  overflow: hidden;
}

#hero-canvas {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  /* 在最底层 */
}

/* 遮罩层（已有，可保持） 
.hero-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.25);
    z-index: 1;          /* 在 canvas 上面 */

/* Hero 文本内容 */
.hero-content {
  /* position: relative;
    z-index: 2;          /* 在最上面，确保可点击 */
  max-width: 720px;
  /* 限制宽度，避免一行太长 */
  margin: 0 auto;
  /* 整块居中 */
  padding: 4rem 1.5rem 5rem;
  /* 自己调 */
  display: flex;
  flex-direction: column;
  align-items: center;
  /* 横向居中 */
  text-align: center;
  /* 文本居中 */
}


.hero-content {
  position: relative;
  z-index: 1;
  /* 确保文字永远在动画之上 */
}

/* Hero 轻量级蓝色光带（很克制版） */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(140deg,
      rgba(15, 23, 42, 0) 0%,
      rgba(37, 99, 235, 0.12) 40%,
      rgba(30, 64, 175, 0.18) 70%,
      rgba(15, 23, 42, 0) 100%);
  mix-blend-mode: screen;
  opacity: 0.35;
  /* 比之前低很多 */
}

/* Hero 区：整体稍微往上提一点 */
.hero-content {
  position: relative;
  margin-top: 1.5rem;
  /* -1.5 可以自己试着改成 -1.0 / -2.0 看效果 */
}

/* Hero 区按钮：居中 + 间距稍大 */
.hero-actions {
  margin-top: 2.5rem;
  display: flex;
  justify-content: center;
  /* 整排居中 */
  align-items: center;
  gap: 3rem;
  /* 两个按钮之间的距离，自己可以调 3~5rem */
  flex-wrap: wrap;
  /* 窄屏时自动换行，不会挤爆 */
}



.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
  padding: 1.5rem 1.5rem 0;
}

.hero-title {
  font-size: 2.4rem;
  line-height: 1.15;
  letter-spacing: 0.02em;
  margin: 0 0 1rem;
  color: #f8f8d5;
  /* 淡金色 */
  text-shadow: 0 0 22px rgba(0, 0, 0, 0.6);
  /* 边缘更清晰 */
}

.hero-subtitle {
  margin: 0 0 1.6rem;
  color: var(--color-text-muted);
  font-size: 1rem;
  color: #f8f8d5;
  /* 淡金色 */
  text-shadow: 0 0 22px rgba(0, 0, 0, 0.6);
  /* 边缘更清晰 */
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.3rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.9rem;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease,
    border-color 0.15s ease;
}
.back-link {
  margin-top: 32px;      /* 和上面的卡片拉开一点距离 */
  width: 100%;           /* 占满这一行 */
  text-align: right;     /* 里面的内容靠右对齐 */
}

.back-link .btn {
  font-size: 0.9rem;     /* 比主按钮稍微小一点 */
}

/* Technical insights 中的 "Read article" 链接样式 */
.insight-link {
    color: #f4d57c;          /* 你的品牌金色 */
    font-weight: 500;
    text-decoration: none;
}

.insight-link:hover {
    color: #ffe9a8;          /* hover 稍微亮一点 */
    text-decoration: underline;
}

/* 主按钮：柔和金色胶囊版（不再上下跳动） */
.btn-primary {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;

  padding: 0.85rem 2.4rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.98rem;

  color: #433023;
  border: 1px solid #fde68a;

  /* 上浅下深，纯金色 */
  background: radial-gradient(circle at 18% 15%, rgba(255, 255, 255, 0.95), transparent 58%),
  linear-gradient(180deg,
    #fff8d1 0%,
    #ffe69a 40%,
    #f7c842 78%,
    #e0ad22 100%);

  /* 常态下阴影减弱一点 */
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.35),
  0 0 10px rgba(250, 204, 21, 0.55);

  cursor: pointer;

  /* 不再做位移/亮度动画，只做阴影变化 */
  transition: box-shadow 0.18s ease-out;
}

/* hover：只让阴影稍微加强一点，不位移、不变亮 */
.btn-primary:hover {
  box-shadow:
    0 10px 20px rgba(0, 0, 0, 0.45),
    0 0 14px rgba(250, 204, 21, 0.8);
}

/* active：压下去一点的感觉，阴影再弱一点 */
.btn-primary:active {
  box-shadow:
    0 4px 10px rgba(0, 0, 0, 0.5),
    0 0 8px rgba(245, 158, 11, 0.7);
}


.btn-primary:hover {
  transform: translateY(-2px);
  filter: brightness(1.02);
  box-shadow:
    0 12px 24px rgba(0, 0, 0, 0.55),
    0 0 18px rgba(250, 204, 21, 0.9);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow:
    0 6px 14px rgba(0, 0, 0, 0.6),
    0 0 12px rgba(245, 158, 11, 0.75);
}


.btn-primary:hover {
  transform: translateY(-2px);
  filter: brightness(1.02);
  box-shadow:
    0 6px 14px rgba(251, 191, 36, 0.7),
    0 0 0 1px rgba(0, 0, 0, 0.4);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow:
    0 4px 10px rgba(180, 132, 18, 0.7),
    0 0 0 1px rgba(0, 0, 0, 0.45);
}

.btn-primary:hover {
  transform: translateY(-1px) scale(1.02);
  box-shadow: 0 5px 10px rgba(251, 191, 36, 0.45);
}

/* 次要按钮：深蓝 + 金色描边（GPU 按钮） */
.btn-secondary {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;

  padding: 0.85rem 2.4rem;
  border-radius: 999px;
  font-weight: 500;
  font-size: 0.96rem;

  color: #e5e7eb;
  background:
    radial-gradient(circle at 20% 0%, rgba(255, 255, 255, 0.06), transparent 55%),
    rgba(15, 23, 42, 0.95);

  border: 1px solid rgba(251, 191, 36, 0.85);
  box-shadow:
    0 10px 22px rgba(15, 23, 42, 0.9),
    0 0 0 1px rgba(0, 0, 0, 0.5);

  cursor: pointer;
  transition:
    transform 0.15s ease-out,
    box-shadow 0.15s ease-out,
    background 0.15s ease-out;
}

.btn-secondary:hover {
  transform: translateY(-2px);
  background:
    radial-gradient(circle at 20% 0%, rgba(255, 255, 255, 0.12), transparent 55%),
    rgba(17, 24, 39, 0.98);
  box-shadow:
    0 14px 28px rgba(15, 23, 42, 0.95),
    0 0 18px rgba(251, 191, 36, 0.35);
}

.btn-secondary:active {
  transform: translateY(0);
  box-shadow:
    0 8px 18px rgba(15, 23, 42, 0.95),
    0 0 12px rgba(251, 191, 36, 0.25);
}


.btn-secondary:hover {
  border-color: var(--color-primary);
  background: rgba(15, 23, 42, 0.6);
}

.hero-tagline {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* 通用 section */
/* 滚动出现动画基础样式 */
.section,
.hero,
#services-pillars {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.6s ease-out,
    transform 0.6s ease-out;
}

/* 当元素变可见时加上这个类 */
.section.is-visible,
.hero.is-visible,
#services-pillars.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.section,
.section-alt {
  padding: 4rem 0;
  background: transparent;
  position: relative;   
  z-index: 0; 
}

/* 模块之间的淡金色发光分隔线 */
.hero+.section::before,
.hero+.section-alt::before,
.section+.section::before,
.section+.section-alt::before,
.section-alt+.section::before,
.section-alt+.section-alt::before {
  content: "";
  position: absolute;
  top: 0;
  left: 8%;
  right: 8%;
  height: 2px;

  background: linear-gradient(90deg,
      transparent,
      rgba(252, 211, 77, 0.9),
      transparent);
  box-shadow: 0 0 18px rgba(252, 211, 77, 0.5);
  opacity: 0.75;
  pointer-events: none;
   z-index: 1;  
}

.section-title {
  font-size: 1.6rem;
  margin: 0 0 0.8rem;
}

.section-intro {
  margin: 0 0 2rem;
  color: var(--color-text-muted);
  max-width: 640px;
}

/* 柱子区 */
.pillars {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

/* 基础卡片：统一深色蒙版，不受背景渐变影响 */
.pillar-card {
  position: relative;
  overflow: hidden;
  border-radius: 1.1rem;
  padding: 1.6rem 1.5rem;
  background: rgba(15, 23, 42, 0.9);
  /* 深蓝基底 */
  border: 1px solid rgba(148, 163, 184, 0.35);
  box-shadow: 0 14px 32px rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(6px);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

/* 公共文字样式 */
.pillar-card h3 {
  margin-top: 0;
  margin-bottom: 0.6rem;
}

.pillar-card p {
  margin-top: 0;
  margin-bottom: 0.8rem;
  color: var(--color-text-muted);
}

.pillar-card ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--color-text-muted);
}

/* 悬浮：统一轻微上浮 */
.pillar-card:hover {
  transform: translateY(-3px);
}

/* ===========================
   UI 卡片：右下浅蓝光
   =========================== */
.pillar-card.ui-card {
  border-color: rgba(147, 197, 253, 0.45);
  box-shadow:
    0 10px 26px rgba(15, 23, 42, 0.9),
    inset 0 0 6px rgba(147, 197, 253, 0.08);
}

/* UI：右下角小范围浅蓝光 */
.pillar-card.ui-card::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 88% 88%,
      /* 右下角为光源 */
      rgba(147, 197, 253, 0.18),
      /* 中心亮度 */
      rgba(147, 197, 253, 0.08) 24%,
      /* 扩散范围 */
      rgba(147, 197, 253, 0.02) 46%,
      transparent 72%);
  opacity: 0.75;
  transition: opacity 0.25s ease;
}

.pillar-card.ui-card:hover::before {
  opacity: 0.95;
}

.pillar-card.ui-card:hover {
  border-color: rgba(147, 197, 253, 0.75);
  box-shadow:
    0 14px 32px rgba(30, 64, 175, 0.5),
    inset 0 0 9px rgba(147, 197, 253, 0.12);
}

/* ===========================
   GPU 卡片：右下白金光
   =========================== */
.pillar-card.gpu-card {
  border-color: rgba(253, 224, 71, 0.45);
  box-shadow:
    0 10px 26px rgba(15, 23, 42, 0.9),
    inset 0 0 6px rgba(253, 224, 71, 0.08);
}

/* GPU：右下角更小更淡的白金光
   —— 面积略小于 UI，一点点即可 */
.pillar-card.gpu-card::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 88% 88%,
      /* 同样右下角光源 */
      rgba(253, 224, 71, 0.14),
      /* 中心更淡一点 */
      rgba(253, 224, 71, 0.05) 20%,
      /* 半径略小于 UI */
      rgba(253, 224, 71, 0.015) 40%,
      transparent 65%);
  opacity: 0.65;
  transition: opacity 0.25s ease;
}

.pillar-card.gpu-card:hover::before {
  opacity: 0.85;
}

.pillar-card.gpu-card:hover {
  border-color: rgba(253, 224, 71, 0.75);
  box-shadow:
    0 12px 24px rgba(253, 224, 71, 0.28),
    inset 0 0 9px rgba(253, 224, 71, 0.12);
}


/* 卡片网格：UI / GPU / 案例 */
.card-grid {
  margin-top: 2.2rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.6rem;
  align-items: stretch;
}

/* 通用服务卡片基础样式 */
.service-card {
  position: relative;
  overflow: hidden;
  padding: 1.5rem 1.4rem 1.6rem;
  border-radius: 1rem;
  background: rgba(15, 23, 42, 0.92);
  border: 1px solid rgba(187, 193, 201, 0.5);
  box-shadow:
    0 8px 26px rgba(15, 23, 42, 0.9),
    0 0 8px rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(5px);
  transition:
    transform 0.25s ease,
    box-shadow 0.25s ease,
    border-color 0.25s ease,
    background 0.25s ease;
}

/* 顶部细色条：从 UI 蓝 过渡到 GPU 金，统一品牌感 */
.service-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg,
      rgba(96, 165, 250, 0.9),
      rgba(251, 191, 36, 0.9));
  opacity: 0.85;
  pointer-events: none;
}

/* 标题与文字排版 */
.service-card h3 {
  font-size: 1.05rem;
  margin: 0 0 0.55rem;
}

.service-card p {
  margin: 0 0 0.8rem;
  color: var(--color-text-muted);
}

.service-card ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--color-text-muted);
}

.service-card li+li {
  margin-top: 0.2rem;
}

/* 小圆点强调标题左侧（更有设计感） */
.service-card h3::before {
  content: "";
  display: inline-block;
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 999px;
  margin-right: 0.45rem;
  background: radial-gradient(circle,
      rgba(249, 250, 251, 0.9),
      rgba(96, 165, 250, 0.3));
  vertical-align: middle;
}

/* 悬浮：轻微上浮 + 边缘高光 */
.service-card:hover {
  transform: translateY(-4px);
  border-color: rgba(191, 219, 254, 0.65);
  background: rgba(15, 23, 42, 0.96);
  box-shadow:
    0 18px 40px rgba(15, 23, 42, 0.95),
    0 0 30px rgba(37, 99, 235, 0.25);
}

/* 小屏幕时间距稍微拉开一点 */
@media (max-width: 768px) {
  .card-grid {
    gap: 1.2rem;
  }

  .service-card {
    padding: 1.35rem 1.1rem 1.4rem;
  }
}

.placeholder-card {
  border-style: dashed;
  border-color: rgba(148, 163, 184, 0.6);
}

/* =========================================
   流程区：5 步横向流程 + 圆形编号
========================================= */

.process-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.5rem;
  counter-reset: step;
}

/* 流程区：标题和列表间距 */
#process .section-title {
  margin-bottom: 3.2rem;
  /* 比之前 2.6 再多一点，让小球离标题更远 */
}

/* 流程区：5 步横向流程 + 圆形编号 */
.process-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.5rem;
  counter-reset: step;
}

/* 桌面端：5 步一行 */
@media (min-width: 1100px) {
  .process-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* 平板：两列 */
@media (min-width: 640px) and (max-width: 1099px) {
  .process-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* 手机：一列 */
@media (max-width: 639px) {
  .process-steps {
    grid-template-columns: 1fr;
  }
}

/* 单个步骤卡片 */
.step-card {
  position: relative;
  background:
    radial-gradient(circle at 18% 0%, rgba(255, 255, 255, 0.04), transparent 55%),
    rgba(15, 23, 42, 0.94);
  /* 比外面略亮一点 */

  padding: 1.8rem 1.2rem 1.4rem;
  border-radius: 1rem;
  border: 1px solid rgba(148, 163, 184, 0.4);
  box-shadow:
    0 10px 26px rgba(15, 23, 42, 0.9),
    0 0 10px rgba(15, 23, 42, 0.6);

  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.6s ease,
    transform 0.6s ease,
    box-shadow 0.25s ease,
    border-color 0.25s ease;
}

.step-card::before {
  content: counter(step);
  counter-increment: step;

  position: absolute;
  top: -0.9rem;
  left: 1.3rem;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 999px;

  display: flex;
  align-items: center;
  justify-content: center;

  font-weight: 600;
  font-size: 1rem;
  color: #0b1120;

  /* 立体感：上亮下稍暗，中心再有一点高光 */
  background:
    radial-gradient(circle at 30% 25%, rgba(255, 255, 255, 0.9), transparent 55%),
    linear-gradient(180deg, rgba(191, 219, 254, 0.98), rgba(129, 199, 255, 0.95));

  border: 1px solid rgba(255, 255, 255, 0.85);
  box-shadow:
    0 4px 10px rgba(15, 23, 42, 0.8),
    0 0 8px rgba(59, 130, 246, 0.35);
}


/* 标题/正文 */
.step-card h3 {
  margin-top: 2.2rem;
  /* 给圆形编号让出空间 */
  margin-bottom: 0.45rem;
  font-size: 1rem;
}

.step-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* 滚动出现时加的类 */
.step-card.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* 悬浮效果 */
.step-card:hover {
  transform: translateY(-4px);
  border-color: rgba(191, 219, 254, 0.9);
  box-shadow: 0 18px 36px rgba(15, 23, 42, 0.95);
}

/* ===============================
   案例区：卡片展示矩阵 Case Grid
================================= */

.case-grid {
  display: grid;
  gap: 1.8rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  margin-top: 2.5rem;
}

/* 整个模块外层 */
.cases-section {
  padding: 4rem 5vw;
  background: radial-gradient(circle at top, #0a1220 0, #02040a 55%, #000000 100%);
  color: #f5f7ff;
}

/* 标题 */
.cases-title {
  font-size: 1.6rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 2rem;
}

/* 卡片栅格 */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.75rem;
}

/* 单个卡片外层：仿 Active Theory 风格 */
.case-card {
  display: block;
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
  border-radius: 1.5rem;
  min-height: 180px;
  padding: 1px;
  /* 用于做内侧发光边框 */
  background:
    radial-gradient(circle at 80% 85%, rgba(72, 132, 255, 0.55), transparent 55%),
    linear-gradient(135deg, #121827, #040711);
  box-shadow:
    0 22px 40px rgba(0, 0, 0, 0.6),
    0 0 0 1px rgba(255, 255, 255, 0.02);
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
  cursor: pointer;
}

/* 背景图：使用 CSS 变量 --card-bg */
.case-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--card-bg);
  background-size: cover;
  background-position: center;
  filter: brightness(1.0) saturate(1.05);
  opacity: 0.95;
  transform: scale(1.02);
  z-index: 0;
}

/* 蓝色/紫色光晕叠加层 */
.case-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 80% 80%, rgba(76, 151, 255, 0.65), transparent 55%),
    radial-gradient(circle at 10% 0%, rgba(252, 221, 47, 0.35), transparent 55%);
  /*140, 100, 255, 0.35紫色配色*/
  mix-blend-mode: screen;
  opacity: 0.8;
  z-index: 1;
}

/* 内部内容区：做一层暗色遮罩，保证文字可读 
.case-inner {
  position: relative;
  z-index: 2;
  height: 100%;
  padding: 1.4rem 1.6rem;
  background: linear-gradient(
    145deg,
    rgba(7, 12, 24, 0.92),
    rgba(7, 12, 24, 0.85),
    rgba(7, 12, 24, 0.7)
  );
  border-radius: 1.4rem;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}*/
.case-inner {
  position: relative;
  z-index: 2;
  height: 100%;
  padding: 1.4rem 1.6rem;
  background: linear-gradient(145deg,
      rgba(7, 12, 24, 0.72),
      rgba(7, 12, 24, 0.55),
      rgba(7, 12, 24, 0.35));
  border-radius: 1.4rem;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}


/* 标题文字 */
.case-title {
    font-size: 1.85rem;           /* 明显大于正文 */
    font-weight: 650;             /* 高级、不粗暴 */
    margin-bottom: 1.2rem;
    color: #eef1ff;               /* 比正文更亮一点 */
    letter-spacing: 0.2px;        /* 微调气质 */
}

/* 描述文字 */
.case-desc {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.6;
  color: rgba(235, 240, 255, 0.78);
}

/* Hover 效果：微微抬起 + 光更亮 */
.case-card:hover {
  transform: translateY(-4px);
  box-shadow:
    0 28px 60px rgba(0, 0, 0, 0.85),
    0 0 0 1px rgba(120, 180, 255, 0.25);
}

.case-card:hover::before {
  filter: blur(3px) brightness(0.8) saturate(1.2);
}

.case-card:hover::after {
  opacity: 1;
}

/* 响应式微调 */
@media (max-width: 600px) {
  .cases-section {
    padding: 3rem 1.25rem;
  }

  .case-inner {
    padding: 1.1rem 1.2rem;
  }

  .case-title {
    font-size: 1rem;
  }

  .case-desc {
    font-size: 0.8rem;
  }
}


/* 标题颜色：与你网站保持一致 
.case-card h3 {
  font-size: 1rem;
  margin: 0;
  color: #f9f4b4;  /* 柔浅金色，同 site-logo-text 
}*/

/* ===============================
   联系区：三卡片布局（升级版）
================================= */

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.8rem;
  margin-top: 2rem;
}

.contact-card {
  background:
    radial-gradient(circle at 0% 0%, rgba(255, 255, 255, 0.04), transparent 55%),
    rgba(15, 23, 42, 0.92);
  border-radius: 1.1rem;
  padding: 1.4rem 1.6rem 1.7rem;

  border: 1px solid rgba(148, 163, 184, 0.26);

  box-shadow:
    0 2px 3px rgba(0, 0, 0, 0.25),
    inset 0 0 24px rgba(255, 255, 255, 0.02);

  backdrop-filter: blur(6px);
  transition: 0.35s ease;
}

/* 悬浮动效：轻光效 + 上浮感 */
.contact-card:hover {
  transform: translateY(-4px);
  border-color: rgba(96, 165, 250, 0.45);
  box-shadow:
    0 14px 26px rgba(0, 0, 0, 0.45),
    0 0 35px rgba(103, 217, 255, 0.22);
}

/* 标题 */
.contact-card h3 {
  margin: 0 0 0.55rem;
  font-size: 1.04rem;
  color: #f9f4b4;
  /* 与全站浅金色一致 */
}

/* 正文文字 */
.contact-card p {
  margin: 0 0 0.65rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.contact-main {
  margin: 0.75rem 0 0.65rem;
  display: flex;
  flex-direction: column;
  gap: 0.28rem;
}

.contact-label {
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #a6a9b0;
}

.contact-main a {
  font-size: 0.95rem;
  color: #fdfdfd;
  text-decoration: none;
}

.contact-main a:hover {
  color: #fbbf24;
  text-decoration: underline;
}

.contact-em {
  font-size: 0.9rem;
  color: #e0e4e8;
}

.contact-note {
  font-size: 0.8rem;
  color: #9ca3af;
}

/* 列表 */
.contact-list {
  margin: 0.4rem 0 0.8rem;
  padding-left: 1.2rem;
  font-size: 0.88rem;
  color: var(--color-text-muted);
}

/* 页脚 */
.site-footer {
  border-top: 1px solid rgba(148, 163, 184, 0.3);
  padding: 1.2rem 0;
  background: rgba(2, 6, 23, 0.98);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* 响应式 */
@media (max-width: 768px) {
  .nav-container {
    gap: 0.75rem;
  }

  /* 手机端显示汉堡菜单 */
  .nav-toggle {
    display: inline-flex;
  }

  /* 手机端默认隐藏主导航 */
  .main-nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    padding: 0.75rem 1.5rem 1rem;
    background: rgba(2, 6, 23, 0.98);
    border-bottom: 1px solid rgba(148, 163, 184, 0.3);
    display: none;
    flex-direction: column;
    gap: 0.25rem;
  }

  /* 打开菜单时显示 */
  .site-header.nav-open .main-nav {
    display: flex;
  }

  .main-nav a {
    padding: 0.45rem 0.6rem;
    border-radius: 0.5rem;
  }

  /* 让 Hero 可承载渐隐层 */
  .hero {
    padding-top: 6rem;
    padding-bottom: 6rem;
    position: relative;
    overflow: hidden;
  }

  /* Hero 底部向下渐隐 */
  .hero::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 200px;

    z-index: 50;
    /* ⭐必须，有 Canvas 时一定要加 */

    pointer-events: none;

    background: linear-gradient(to bottom,
        rgba(0, 0, 0, 0) 0%,
        rgba(0, 0, 0, 0.55) 60%,
        rgba(0, 0, 0, 0.8) 80%,
        rgba(0, 0, 0, 1) 100%);
  }

  .hero-title {
    font-size: 1.9rem;
    color: #f9fafb;
    /* 纯浅色 */
    text-shadow: 0 0 22px rgba(0, 0, 0, 0.6);
    /* 轻微描边感，防止糊 */
  }

  .hero-content {
    padding: 1.5rem 0.5rem 0;
  }

  .footer-content {
    flex-direction: column;
    gap: 0.35rem;
    align-items: flex-start;
  }
}

/* ========= 标题统一浅色 =========== */
h1,
h2,
h3,
h4,
h5,
h6,
.hero-title,
.hero-heading,
.hero-title-large,
.section-title,
.service-card h3,
.pillar-card h3,
.logo-text,
.site-logo {
  color: #fffff2 !important;
}

/* AuGPU - 圣诞彩窗案例卡片（单独一张，不影响原有卡片） */
.au-case-card {
  display: block;
  padding: 18px 20px 16px;
  border-radius: 22px;
  background: radial-gradient(circle at top, #151c3a, #050814 60%, #000);
  border: 1px solid rgba(251, 211, 141, 0.55);
  box-shadow:
    0 16px 40px rgba(15, 23, 42, 0.96),
    0 0 0 1px rgba(15, 23, 42, 0.9) inset;
  color: #f7fafc;
  text-decoration: none;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.au-case-card:hover {
  transform: translateY(-3px);
  box-shadow:
    0 22px 50px rgba(15, 23, 42, 0.98),
    0 0 0 1px rgba(251, 211, 141, 0.8);
}

.au-case-title {
  font-size: 16px;
  margin-bottom: 6px;
  letter-spacing: 0.04em;
}

.au-case-sub {
  font-size: 12px;
  color: #a0aec0;
  line-height: 1.6;
}

.au-case-footer {
  margin-top: 10px;
  font-size: 11px;
  color: #cbd5f5;
}

/* 让 tawk.to 永远在所有元素上方，不会被遮挡 */
iframe[src*="tawk.to"],
#tawkchat-container {
  position: fixed !important;
  z-index: 2147483647 !important;
  /* 顶级层级 */
  pointer-events: auto !important;
}

/* -------- Case Study / Long-form Technical Reading Improvements -------- */
.case-page .section .container {
    max-width: 860px;
    margin: 0 auto;
}

.section p {
    line-height: 1.62;
    margin-bottom: 1.1rem;
    color: rgba(219, 226, 242, 0.87);
}

.section li {
    line-height: 1.55;
    margin-bottom: 0.45rem;
    color: rgba(219, 226, 242, 0.88);
}

.section h2.section-subtitle {
    font-size: 1.35rem;      
    font-weight: 600;        
    margin-top: 2.4rem;      
    margin-bottom: 1rem;
    color: #e6e9f5;          /* 标题比正文更亮 */
}


.section h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-top: 1.6rem;
    color: #dfe3f0;           /* 介于 H2 与正文之间 */
}


.simple-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.95rem;
}

.simple-table th,
.simple-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.simple-table th {
    color: #e8ecff;
}

.simple-table tr:last-child td {
    border-bottom: none;
}

.card-grid,
.card-grid.card-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));  /* 2 列 */
    gap: 24px;
}

/* 小屏幕就一列 */
@media (max-width: 768px) {
    .gpu-issue-grid,
    .card-grid.gpu-issue-grid {
        grid-template-columns: 1fr;
    }
}

/* 让 “What we fix” 和 “How we work” 之间更松一点 */
#gpu-services .card-grid {
    margin-bottom: 48px;   /* 可以改成 32 / 48 按你喜好微调 */
}

.cta-wrap {
  text-align: center;
  margin: 80px 0;
}

.cta-btn {
  padding: 14px 28px;
  font-size: 16px;
  font-weight: 500;
  color: #0b0f19;
  background: linear-gradient(135deg, #f5c77a, #e0a94f);
  border: none;
  border-radius: 999px;
  cursor: pointer;
}

.cta-btn:hover {
  opacity: 0.9;
}