/* ========================================================================
   星致跨境官网 - 全站共享样式
   设计风格：现代商务科技感 · 蓝色为主 · 黄色点缀 · 大面积留白
   ======================================================================== */

/* ---------- 设计 Token ---------- */
:root {
  /* 主色 */
  --color-primary: #1268E8;       /* 科技蓝 */
  --color-deep: #0B2F5B;          /* 深海蓝 */
  /* 辅助色 */
  --color-accent: #FFC928;        /* 活力黄 */
  --color-bg-soft: #EAF4FF;      /* 浅科技蓝背景 */
  --color-white: #FFFFFF;
  /* 文字 */
  --color-text: #172B4D;          /* 深色正文 */
  --color-text-sub: #666666;     /* 次要文字 */
  --color-text-light: #FFFFFF;
  /* 字体 */
  --font-cn: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
  --font-en: "Inter", Arial, sans-serif;
  /* 间距 */
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 40px;
  --space-xl: 64px;
  --space-xxl: 96px;
  /* 字号 */
  --fs-xs: 12px;
  --fs-sm: 14px;
  --fs-base: 16px;
  --fs-md: 18px;
  --fs-lg: 24px;
  --fs-xl: 32px;
  --fs-xxl: 44px;
  --fs-hero: 56px;
  /* 圆角 / 阴影 */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-card: 0 8px 24px rgba(11, 47, 91, 0.08);
  --shadow-hover: 0 16px 40px rgba(18, 104, 232, 0.18);
  /* 容器宽度 */
  --container-max: 1200px;
  --header-h: 72px;
}

/* ---------- 基础重置 ---------- */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-cn);
  font-size: var(--fs-base);
  color: var(--color-text);
  background: var(--color-white);
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .25s ease; }
a:hover { color: var(--color-primary); }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
}
section { position: relative; }

/* ---------- 通用工具类 ---------- */
.section-pad { padding: var(--space-xxl) 0; }
.section-pad-sm { padding: var(--space-xl) 0; }
.bg-soft { background: var(--color-bg-soft); }
.bg-white { background: var(--color-white); }
.text-center { text-align: center; }
.en-num { font-family: var(--font-en); }

/* 板块标题 */
.section-title {
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--color-deep);
  letter-spacing: 1px;
  margin-bottom: var(--space-sm);
  position: relative;
  display: inline-block;
}
.section-title::after {
  content: "";
  display: block;
  width: 56px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: 2px;
  margin-top: 12px;
}
.section-title.text-center::after { margin-left: auto; margin-right: auto; }
.section-subtitle {
  font-size: var(--fs-md);
  color: var(--color-text-sub);
  max-width: 760px;
  margin: var(--space-sm) auto 0;
  line-height: 1.8;
}
.section-head { text-align: center; margin-bottom: var(--space-xl); }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: var(--fs-base);
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all .3s ease;
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-accent);
  color: var(--color-deep);
  box-shadow: 0 8px 20px rgba(255, 201, 40, 0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(255, 201, 40, 0.5);
  color: var(--color-deep);
}
.btn-blue {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 8px 20px rgba(18, 104, 232, 0.3);
}
.btn-blue:hover { background: #0d56c4; color: #fff; transform: translateY(-2px); }
.btn-outline {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.7);
}
.btn-outline:hover { background: #fff; color: var(--color-deep); border-color: #fff; }
.btn-ghost {
  background: var(--color-bg-soft);
  color: var(--color-primary);
}
.btn-ghost:hover { background: var(--color-primary); color: #fff; }

/* ============================================================
   顶部导航
   ============================================================ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(11, 47, 91, 0.06);
  z-index: 1000;
  transition: box-shadow .3s ease;
}
.site-header.scrolled { box-shadow: 0 4px 20px rgba(11, 47, 91, 0.08); }
.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--color-deep);
}
.logo img { height: 40px; width: auto; }
.logo .brand-sub { font-size: 12px; color: var(--color-text-sub); font-weight: 400; }

/* 主导航 */
.main-nav { display: flex; align-items: center; gap: 4px; }
.nav-item { position: relative; }
.nav-link {
  display: block;
  padding: 10px 16px;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: all .2s ease;
}
.nav-link:hover, .nav-item.active .nav-link { color: var(--color-primary); background: var(--color-bg-soft); }

/* 下拉菜单 */
.dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 260px;
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: 0 12px 40px rgba(11, 47, 91, 0.12);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all .25s ease;
}
.nav-item:hover .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown a {
  display: block;
  padding: 10px 14px;
  font-size: var(--fs-sm);
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: all .2s ease;
}
.dropdown a:hover { background: var(--color-bg-soft); color: var(--color-primary); padding-left: 18px; }

/* 顶栏右侧 CTA */
.header-cta { margin-left: var(--space-sm); }
.header-cta .btn { padding: 10px 22px; font-size: var(--fs-sm); }

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 0;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-deep);
  transition: all .3s ease;
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端遮罩 */
.mobile-mask {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(11, 47, 91, 0.4);
  z-index: 998;
  opacity: 0;
  transition: opacity .3s ease;
}
.mobile-mask.show { display: block; opacity: 1; }

/* ============================================================
   首页 Banner
   ============================================================ */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-h);
  background: linear-gradient(135deg, rgba(11,47,91,0.18) 0%, rgba(18,104,232,0.08) 100%),
              url("../images/image2.png") center/cover no-repeat;
  color: #fff;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  right: -100px;
  bottom: -100px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(255,201,40,0.10) 0%, transparent 70%);
  pointer-events: none;
}
.hero-content { max-width: 720px; position: relative; z-index: 2; }
.hero-tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(255, 201, 40, 0.18);
  border: 1px solid rgba(255, 201, 40, 0.4);
  color: var(--color-accent);
  border-radius: 20px;
  font-size: var(--fs-sm);
  font-weight: 500;
  margin-bottom: var(--space-sm);
}
.hero h1 {
  font-size: var(--fs-hero);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--space-md);
  text-shadow: 0 3px 24px rgba(0,0,0,0.55);
}
.hero h1 .accent { color: var(--color-accent); }
.hero p {
  font-size: var(--fs-md);
  line-height: 1.9;
  color: rgba(255,255,255,0.95);
  max-width: 620px;
  margin-bottom: var(--space-lg);
}
.hero-actions { display: flex; gap: var(--space-sm); flex-wrap: wrap; }

/* ---------- 核心数据条 ---------- */
.stats-bar {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: var(--space-lg) var(--space-md);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  margin-top: -60px;
  position: relative;
  z-index: 5;
}
.stat-item { text-align: center; padding: var(--space-sm); position: relative; }
.stat-item:not(:last-child)::after {
  content: "";
  position: absolute;
  right: 0; top: 20%; bottom: 20%;
  width: 1px;
  background: rgba(11,47,91,0.1);
}
.stat-num {
  font-family: var(--font-en);
  font-size: 44px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-primary), var(--color-deep));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
}
.stat-num .unit { font-size: 22px; color: var(--color-accent); -webkit-text-fill-color: var(--color-accent); }
.stat-desc {
  font-size: var(--fs-sm);
  color: var(--color-text-sub);
  margin-top: 8px;
}

/* ---------- 业务卡片网格 ---------- */
.biz-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}
.biz-card {
  background: #fff;
  border: 1px solid rgba(11,47,91,0.06);
  border-radius: var(--radius-md);
  padding: var(--space-lg) var(--space-md);
  text-align: center;
  transition: all .35s ease;
  position: relative;
  overflow: hidden;
}
.biz-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform: scaleX(0);
  transition: transform .35s ease;
}
.biz-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}
.biz-card:hover::before { transform: scaleX(1); }
.biz-icon {
  width: 80px; height: 80px;
  margin: 0 auto var(--space-md);
  display: flex;
  align-items: center;
  justify-content: center;
}
.biz-icon img { max-width: 100%; max-height: 100%; object-fit: contain; }
.biz-card h3 {
  font-size: var(--fs-md);
  color: var(--color-deep);
  margin-bottom: 10px;
  font-weight: 700;
}
.biz-card p { font-size: var(--fs-sm); color: var(--color-text-sub); line-height: 1.7; }

/* ---------- 双栏模块 ---------- */
.feature-row {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: var(--space-xl);
  align-items: center;
}
/* 首页大图片版（图片 70% + 间距 192px） */
.feature-row-wide-img {
  grid-template-columns: 1.4fr 0.6fr;
  gap: calc(var(--space-xl) * 3);
}
.feature-row.reverse { direction: rtl; }
.feature-row.reverse > * { direction: ltr; }
/* 星智AI文字列排版：功能点横向排列，只显示编号+标题 */
.feature-row-ai .ai-diagram-tags { gap: 8px; margin-bottom: 12px; }
.feature-row-ai .ai-diagram-tags .module-tag { font-size: 12px; padding: 5px 12px; }
.feature-row-ai .feature-text h2 { font-size: 24px; line-height: 1.35; margin-bottom: 12px; }
.feature-row-ai .feature-text > p { font-size: 14px; line-height: 1.8; margin-bottom: 18px; }
.feature-row-ai .feature-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 14px;
  margin-bottom: 22px;
}
.feature-row-ai .feature-list li {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 0;
  border-bottom: none;
  min-width: 0;
}
.feature-row-ai .feature-list .num { width: 20px; height: 20px; font-size: 11px; }
.feature-row-ai .feature-list .item-body h4 { font-size: 13px; margin-bottom: 0; white-space: nowrap; }
.feature-row-ai .feature-list .item-body p { display: none; }
.feature-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
  background: var(--color-bg-soft);
}

/* ---------- 星智AI全宽信息图区块（首页） ---------- */
.ai-diagram-block {
  text-align: center;
}
.ai-diagram-intro {
  max-width: 860px;
  margin: 0 auto var(--space-lg);
}
.ai-diagram-tags {
  display: flex;
  gap: 10px;
  justify-content: flex-start;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.ai-diagram-tags .module-tag {
  background: linear-gradient(135deg, #0B2F5B 0%, #1868E8 100%);
  color: #fff;
  border: none;
  font-size: 13px;
}
.ai-diagram-title {
  font-size: 32px;
  font-weight: 800;
  color: var(--color-primary-dark);
  letter-spacing: 1px;
  margin-bottom: 16px;
}
.ai-diagram-desc {
  font-size: 16px;
  color: var(--color-text-sub);
  line-height: 1.9;
}
/* 全宽图片容器 */
.ai-diagram-wrap {
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 12px 48px rgba(11, 47, 91, 0.18);
  background: #fff;
  margin: var(--space-lg) 0 var(--space-xl);
}
.ai-diagram-wrap img {
  width: 100%;
  height: auto;
  display: block;
}
/* 下方功能点：桌面端 5 列 */
.ai-feature-list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-lg);
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
  text-align: left;
}
.ai-feature-list > li {
  background: #fff;
  border: 1px solid rgba(11, 47, 91, 0.08);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  gap: 14px;
  align-items: flex-start;
  transition: all .25s ease;
}
.ai-feature-list > li:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(11, 47, 91, 0.1);
  border-color: var(--color-accent);
}
.ai-feature-list > li .num {
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: linear-gradient(135deg, #0B2F5B, #1868E8);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.ai-feature-list > li h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 6px;
}
.ai-feature-list > li p {
  font-size: 13px;
  color: var(--color-text-sub);
  line-height: 1.65;
  margin: 0;
}
.ai-diagram-cta {
  margin-top: var(--space-md);
}
.feature-media img { width: 100%; height: auto; display: block; }
.feature-text .module-tag {
  display: inline-block;
  background: var(--color-bg-soft);
  color: var(--color-primary);
  font-size: var(--fs-xs);
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 20px;
  margin-right: 8px;
  margin-bottom: 10px;
}
.feature-text h2 {
  font-size: var(--fs-xl);
  color: var(--color-deep);
  font-weight: 700;
  margin-bottom: var(--space-sm);
  line-height: 1.3;
}
.feature-text > p {
  color: var(--color-text-sub);
  font-size: var(--fs-base);
  margin-bottom: var(--space-md);
  line-height: 1.9;
}
.feature-list { margin-bottom: var(--space-lg); }
.feature-list li {
  display: flex;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px dashed rgba(11,47,91,0.08);
}
.feature-list li:last-child { border-bottom: none; }
.feature-list .num {
  flex-shrink: 0;
  width: 36px; height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary), var(--color-deep));
  color: #fff;
  border-radius: 50%;
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 14px;
}
.feature-list .item-body h4 {
  font-size: var(--fs-base);
  color: var(--color-deep);
  margin-bottom: 4px;
  font-weight: 700;
}
.feature-list .item-body p { font-size: var(--fs-sm); color: var(--color-text-sub); line-height: 1.7; }

/* ---------- 培训课程卡片 ---------- */
.course-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}
.course-card {
  background: #fff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform .35s ease, box-shadow .35s ease;
  display: flex;
  flex-direction: column;
}
.course-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.course-banner {
  height: 140px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-deep) 100%);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-family: var(--font-en);
  font-size: 28px;
  font-weight: 800;
  letter-spacing: 2px;
}
.course-card:nth-child(2) .course-banner { background: linear-gradient(135deg, #0B2F5B 0%, #1268E8 100%); }
.course-card:nth-child(3) .course-banner { background: linear-gradient(135deg, #1268E8 0%, #FFC928 200%); }
.course-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 20%, rgba(255,201,40,0.25), transparent 60%);
}
.course-price-tag {
  position: absolute;
  top: 14px; right: 14px;
  background: var(--color-accent);
  color: var(--color-deep);
  padding: 4px 12px;
  border-radius: 16px;
  font-weight: 700;
  font-family: var(--font-en);
  font-size: 14px;
  z-index: 2;
}
.course-body { padding: var(--space-md); flex: 1; display: flex; flex-direction: column; }
.course-body h3 {
  font-size: var(--fs-md);
  color: var(--color-deep);
  margin-bottom: 10px;
  font-weight: 700;
  line-height: 1.4;
}
.course-audience {
  font-size: var(--fs-sm);
  color: var(--color-text-sub);
  margin-bottom: var(--space-sm);
  padding-bottom: var(--space-sm);
  border-bottom: 1px dashed rgba(11,47,91,0.1);
}
.course-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; }
.course-tags span {
  font-size: 12px;
  color: var(--color-primary);
  background: var(--color-bg-soft);
  padding: 4px 10px;
  border-radius: 12px;
}
.cta-row { text-align: center; margin-top: var(--space-xl); }

/* ---------- 优势卡片 ---------- */
.adv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}
.adv-card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: var(--space-lg) var(--space-md);
  border: 1px solid rgba(11,47,91,0.06);
  transition: all .35s ease;
  position: relative;
}
.adv-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}
.adv-icon {
  width: 64px; height: 64px;
  margin-bottom: var(--space-sm);
}
.adv-icon img { max-width: 100%; max-height: 100%; }
.adv-card h3 {
  font-size: var(--fs-md);
  color: var(--color-deep);
  margin-bottom: 10px;
  font-weight: 700;
}
.adv-card p { font-size: var(--fs-sm); color: var(--color-text-sub); line-height: 1.8; }

/* ---------- 底部 CTA 横幅 ---------- */
.cta-banner {
  background: linear-gradient(120deg, var(--color-deep) 0%, var(--color-primary) 100%);
  color: #fff;
  text-align: center;
  padding: var(--space-xl) var(--space-md);
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: "";
  position: absolute;
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(255,201,40,0.2), transparent 70%);
  top: -100px; left: -50px;
}
.cta-banner::after {
  content: "";
  position: absolute;
  width: 360px; height: 360px;
  background: radial-gradient(circle, rgba(255,201,40,0.15), transparent 70%);
  bottom: -150px; right: -80px;
}
.cta-banner h2 {
  font-size: var(--fs-xxl);
  font-weight: 800;
  margin-bottom: var(--space-sm);
  position: relative;
  z-index: 2;
}
.cta-banner p {
  font-size: var(--fs-md);
  color: rgba(255,255,255,0.85);
  margin-bottom: var(--space-lg);
  position: relative;
  z-index: 2;
}
.cta-banner .btn { position: relative; z-index: 2; }

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  background: #0a2547;
  color: rgba(255,255,255,0.75);
  padding: var(--space-xl) 0 var(--space-md);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1.2fr 1fr;
  gap: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-col h4 {
  color: #fff;
  font-size: var(--fs-md);
  font-weight: 700;
  margin-bottom: var(--space-sm);
}
.footer-col p { font-size: var(--fs-sm); line-height: 1.9; color: rgba(255,255,255,0.65); }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: var(--fs-sm); color: rgba(255,255,255,0.65); transition: all .2s ease; }
.footer-col ul li a:hover { color: var(--color-accent); padding-left: 4px; }
.footer-contact li { display: flex; gap: 8px; margin-bottom: 10px; font-size: var(--fs-sm); color: rgba(255,255,255,0.7); }
.footer-contact .label { color: var(--color-accent); flex-shrink: 0; }
.footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: var(--space-sm); }
.footer-logo img { height: 36px; filter: brightness(0) invert(1); }
.footer-logo span { font-size: 18px; font-weight: 700; color: #fff; }
.qr-box { text-align: center; margin-top: 10px; }
.qr-box img {
  width: 110px; height: 110px;
  border-radius: var(--radius-sm);
  margin: 0 auto 8px;
  border: 4px solid #fff;
}
.qr-box .qr-text { font-size: 12px; color: rgba(255,255,255,0.6); }
.social-list li { font-size: var(--fs-sm); color: rgba(255,255,255,0.7); margin-bottom: 8px; }
.social-list .label { color: var(--color-accent); }
.footer-bottom {
  text-align: center;
  font-size: var(--fs-xs);
  color: rgba(255,255,255,0.5);
  padding-top: var(--space-md);
}
.footer-domain {
  margin-top: 8px;
  font-size: var(--fs-sm);
  color: rgba(255,255,255,0.6);
}
.footer-domain a {
  color: var(--color-accent);
  text-decoration: none;
  font-family: var(--font-en);
  font-weight: 500;
  transition: opacity .2s;
}
.footer-domain a:hover { opacity: .85; }
.footer-contact li .domain-display {
  color: var(--color-accent);
  font-family: var(--font-en);
  font-weight: 500;
  text-decoration: none;
}
.footer-contact li .domain-display:hover { text-decoration: underline; }

/* ---------- 右侧悬浮咨询按钮 ---------- */
.float-consult {
  position: fixed;
  right: 24px;
  bottom: 32px;
  z-index: 900;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
}
.float-btn {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-deep));
  color: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(18,104,232,0.4);
  cursor: pointer;
  transition: transform .25s ease;
  position: relative;
}
.float-btn:hover { transform: scale(1.08); }
.float-btn svg { width: 24px; height: 24px; }
.float-btn .badge {
  position: absolute;
  top: -4px; right: -4px;
  width: 18px; height: 18px;
  background: var(--color-accent);
  color: var(--color-deep);
  border-radius: 50%;
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-en);
}
.float-panel {
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: 0 12px 40px rgba(11,47,91,0.18);
  padding: var(--space-md);
  min-width: 240px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all .25s ease;
}
.float-panel.show { opacity: 1; visibility: visible; transform: translateY(0); }
.float-panel h4 { color: var(--color-deep); margin-bottom: 8px; font-size: var(--fs-md); }
.float-panel a { color: var(--color-primary); font-family: var(--font-en); font-size: 20px; font-weight: 700; }
.float-panel p { font-size: var(--fs-sm); color: var(--color-text-sub); margin-top: 4px; }

/* ============================================================
   子页面通用 - 小 Banner
   ============================================================ */
.page-banner {
  margin-top: var(--header-h);
  background: linear-gradient(135deg, var(--color-deep) 0%, var(--color-primary) 100%);
  color: #fff;
  padding: var(--space-xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-banner::before {
  content: "";
  position: absolute;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(255,201,40,0.18), transparent 70%);
  top: -150px; right: -100px;
}
.page-banner h1 {
  font-size: var(--fs-xxl);
  font-weight: 800;
  margin-bottom: 8px;
  position: relative;
}
.page-banner p { color: rgba(255,255,255,0.85); font-size: var(--fs-md); position: relative; }
.breadcrumb {
  font-size: var(--fs-sm);
  color: rgba(255,255,255,0.7);
  margin-top: var(--space-sm);
  position: relative;
}
.breadcrumb a { color: rgba(255,255,255,0.7); }
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb .sep { margin: 0 8px; }

/* ---------- 关于我们 - 时间轴 ---------- */
.about-intro {
  font-size: var(--fs-md);
  color: var(--color-text);
  line-height: 2;
  max-width: 920px;
  margin: 0 auto;
  text-align: justify;
}
.timeline {
  max-width: 880px;
  margin: 0 auto;
  position: relative;
  padding-left: 40px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 12px; top: 6px; bottom: 6px;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-primary), var(--color-accent));
}
.timeline-item {
  position: relative;
  padding-bottom: var(--space-lg);
}
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -34px; top: 4px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 3px solid var(--color-primary);
  box-shadow: 0 0 0 4px rgba(18,104,232,0.12);
}
.timeline-year {
  font-family: var(--font-en);
  font-size: var(--fs-lg);
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 6px;
}
.timeline-title {
  font-size: var(--fs-md);
  font-weight: 700;
  color: var(--color-deep);
  margin-bottom: 8px;
}
.timeline-desc { color: var(--color-text-sub); line-height: 1.8; }

/* 团队介绍卡片 */
.team-block {
  background: var(--color-bg-soft);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  max-width: 920px;
  margin: 0 auto;
}
.team-block p { font-size: var(--fs-md); line-height: 2; color: var(--color-text); }

/* 企业文化三栏 */
.culture-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}
.culture-card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: var(--space-lg) var(--space-md);
  text-align: center;
  border-top: 4px solid var(--color-primary);
  box-shadow: var(--shadow-card);
  transition: transform .3s ease;
}
.culture-card:nth-child(2) { border-top-color: var(--color-accent); }
.culture-card:nth-child(3) { border-top-color: var(--color-deep); }
.culture-card:hover { transform: translateY(-6px); }
.culture-card .icon {
  width: 56px; height: 56px;
  margin: 0 auto var(--space-sm);
  background: var(--color-bg-soft);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}
.culture-card h3 { color: var(--color-deep); font-size: var(--fs-md); margin-bottom: 10px; }
.culture-card p { color: var(--color-text-sub); font-size: var(--fs-sm); line-height: 1.8; }

/* ---------- 案例卡片 ---------- */
.case-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}
.case-card {
  background: #fff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform .3s ease, box-shadow .3s ease;
  border: 1px solid rgba(11,47,91,0.06);
}
.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.case-head {
  background: linear-gradient(135deg, var(--color-deep), var(--color-primary));
  color: #fff;
  padding: var(--space-md);
  position: relative;
}
.case-head .case-tag {
  display: inline-block;
  background: rgba(255,201,40,0.25);
  color: var(--color-accent);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 12px;
  margin-bottom: 8px;
}
.case-head h3 { font-size: var(--fs-md); font-weight: 700; }
.case-body { padding: var(--space-md); }
.case-body p { color: var(--color-text-sub); line-height: 1.8; font-size: var(--fs-sm); }
.case-highlight {
  margin-top: var(--space-sm);
  padding: var(--space-sm);
  background: var(--color-bg-soft);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}
.case-highlight .from,
.case-highlight .to {
  font-family: var(--font-en);
  font-weight: 800;
  font-size: 28px;
}
.case-highlight .from { color: var(--color-text-sub); }
.case-highlight .arrow { color: var(--color-accent); font-size: 24px; }
.case-highlight .to { color: var(--color-primary); }
.case-highlight .label { font-size: var(--fs-sm); color: var(--color-text-sub); width: 100%; }

/* ---------- 新闻列表 ---------- */
.news-list { max-width: 900px; margin: 0 auto; }
.news-item {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid rgba(11,47,91,0.08);
  transition: all .25s ease;
}
.news-item:hover { padding-left: 8px; }
.news-item:hover h3 { color: var(--color-primary); }
.news-date {
  flex-shrink: 0;
  width: 90px;
  text-align: center;
  background: var(--color-bg-soft);
  border-radius: var(--radius-sm);
  padding: 12px 8px;
  align-self: flex-start;
}
.news-date .day { font-family: var(--font-en); font-size: 26px; font-weight: 800; color: var(--color-primary); line-height: 1; }
.news-date .ym { font-size: 12px; color: var(--color-text-sub); margin-top: 4px; }
.news-body { flex: 1; }
.news-body h3 { font-size: var(--fs-md); color: var(--color-deep); margin-bottom: 8px; font-weight: 700; transition: color .25s ease; }
.news-body p { font-size: var(--fs-sm); color: var(--color-text-sub); line-height: 1.8; }
.news-body .more { display: inline-block; margin-top: 10px; font-size: var(--fs-sm); color: var(--color-primary); font-weight: 600; }

/* ---------- 招聘卡片 ---------- */
.job-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}
.job-card {
  background: #fff;
  border: 1px solid rgba(11,47,91,0.08);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  transition: all .3s ease;
}
.job-card:hover { border-color: var(--color-primary); box-shadow: var(--shadow-card); transform: translateY(-3px); }
.job-card .job-icon {
  flex-shrink: 0;
  width: 56px; height: 56px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--color-bg-soft), #fff);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-en);
  font-weight: 800;
  font-size: 20px;
  color: var(--color-primary);
  border: 1px solid rgba(18,104,232,0.15);
}
.job-info h3 { font-size: var(--fs-md); color: var(--color-deep); margin-bottom: 4px; font-weight: 700; }
.job-info p { font-size: var(--fs-sm); color: var(--color-text-sub); }
.job-card .btn { padding: 8px 18px; font-size: var(--fs-sm); }

/* ---------- FAQ 手风琴 ---------- */
.faq-list { max-width: 880px; margin: 0 auto; }
.faq-item {
  background: #fff;
  border: 1px solid rgba(11,47,91,0.08);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-sm);
  overflow: hidden;
  transition: box-shadow .3s ease, border-color .3s ease;
}
.faq-item.active { border-color: var(--color-primary); box-shadow: var(--shadow-card); }
.faq-q {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px var(--space-md);
  cursor: pointer;
  font-size: var(--fs-base);
  font-weight: 600;
  color: var(--color-deep);
  transition: background .25s ease;
}
.faq-q:hover { background: var(--color-bg-soft); }
.faq-q .q-icon {
  flex-shrink: 0;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--color-bg-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 13px;
  font-family: var(--font-en);
}
.faq-item.active .faq-q .q-icon { background: var(--color-primary); color: #fff; }
.faq-q .arrow {
  margin-left: auto;
  transition: transform .3s ease;
  color: var(--color-text-sub);
  font-size: 18px;
}
.faq-item.active .faq-q .arrow { transform: rotate(180deg); color: var(--color-primary); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease;
}
.faq-a-inner {
  padding: 0 var(--space-md) var(--space-md);
  padding-left: 56px;
  color: var(--color-text-sub);
  line-height: 1.9;
  font-size: var(--fs-sm);
}

/* ---------- 合作伙伴 Logo 墙 ---------- */
.partner-intro {
  text-align: center;
  max-width: 760px;
  margin: 0 auto var(--space-lg);
  font-size: var(--fs-md);
  color: var(--color-text-sub);
  line-height: 1.9;
}
.partner-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-bg-soft);
  color: var(--color-primary);
  padding: 10px 22px;
  border-radius: 24px;
  font-size: var(--fs-sm);
  font-weight: 600;
  margin: 0 auto var(--space-md);
}
.partner-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}
.partner-logo {
  background: #fff;
  border-radius: var(--radius-md);
  padding: var(--space-lg) var(--space-md);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(11,47,91,0.06);
  transition: all .35s ease;
  min-height: 160px;
}
.partner-logo img {
  max-width: 80%;
  max-height: 100px;
  filter: grayscale(100%);
  opacity: 0.7;
  transition: all .35s ease;
}
.partner-logo:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}
.partner-logo:hover img { filter: grayscale(0); opacity: 1; }

/* ---------- 通用占位 / 助手 ---------- */
.spacer-sm { height: var(--space-md); }
.spacer { height: var(--space-lg); }

/* ============================================================
   响应式 - 平板 (≤1024px)
   ============================================================ */
@media (max-width: 1024px) {
  :root {
    --fs-hero: 44px;
    --fs-xxl: 36px;
    --fs-xl: 28px;
    --space-xxl: 72px;
    --space-xl: 48px;
  }
  .biz-grid { grid-template-columns: repeat(2, 1fr); }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .course-grid { grid-template-columns: 1fr; max-width: 560px; margin: 0 auto; }
  .feature-row, .feature-row.reverse { grid-template-columns: 1fr; direction: ltr; gap: var(--space-md); }
  .feature-media { order: -1; }
  /* 星智AI分栏布局：平板端也变单列 */
  .feature-row-ai { grid-template-columns: 1fr; }
  /* 星智AI全宽图：平板适配 */
  .ai-feature-list { grid-template-columns: repeat(3, 1fr); gap: 16px; }
  .ai-diagram-title { font-size: 26px; }
  .culture-grid { grid-template-columns: 1fr; max-width: 560px; margin: 0 auto; }
  .partner-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-md); }
  .case-grid, .job-grid { grid-template-columns: 1fr; max-width: 640px; margin: 0 auto; }
  .stats-bar { grid-template-columns: repeat(3, 1fr); padding: var(--space-md); }
  .stat-num { font-size: 36px; }
}

/* ============================================================
   响应式 - 手机 (≤768px)
   ============================================================ */
@media (max-width: 768px) {
  :root {
    --fs-hero: 30px;
    --fs-xxl: 26px;
    --fs-xl: 22px;
    --fs-lg: 20px;
    --space-xxl: 56px;
    --space-xl: 36px;
    --space-lg: 28px;
    --header-h: 60px;
  }

  /* 隐藏桌面导航，启用抽屉 */
  .main-nav {
    position: fixed;
    top: var(--header-h);
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: calc(100vh - var(--header-h));
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-md);
    gap: 4px;
    box-shadow: -8px 0 30px rgba(11,47,91,0.1);
    overflow-y: auto;
    transition: right .3s ease;
    z-index: 999;
  }
  .main-nav.open { right: 0; }
  .nav-item { width: 100%; }
  .nav-link { padding: 14px 12px; font-size: var(--fs-base); border-bottom: 1px solid rgba(11,47,91,0.06); border-radius: 0; }
  .dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    padding: 0 0 0 12px;
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s ease;
  }
  .nav-item.open .dropdown { max-height: 400px; }
  .nav-item .arrow-toggle {
    position: absolute;
    right: 8px;
    top: 14px;
    font-size: 14px;
    color: var(--color-text-sub);
    transition: transform .3s ease;
    pointer-events: none;
  }
  .nav-item.open .arrow-toggle { transform: rotate(180deg); }
  .header-cta { display: none; }
  .nav-toggle { display: flex; }
  .logo img { height: 34px; }
  .logo { font-size: 16px; }

  /* Hero */
  .hero { min-height: auto; padding-top: calc(var(--header-h) + 40px); padding-bottom: 60px; }
  .hero h1 { font-size: var(--fs-hero); }
  .hero p { font-size: var(--fs-base); }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }

  .stats-bar {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
    margin-top: -40px;
    padding: var(--space-md);
  }
  .stat-item:not(:last-child)::after { display: none; }
  .stat-item:not(:last-child) { border-bottom: 1px solid rgba(11,47,91,0.08); padding-bottom: var(--space-sm); }
  .stat-num { font-size: 32px; }

  .biz-grid, .adv-grid { grid-template-columns: 1fr; }
  .partner-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-md); }

  /* 星智AI全宽图：手机适配 */
  .ai-feature-list { grid-template-columns: 1fr; gap: 12px; }
  .ai-feature-list > li { padding: 14px 16px; }
  .ai-diagram-title { font-size: 22px; }
  .ai-diagram-desc { font-size: 14px; line-height: 1.8; }
  .ai-diagram-wrap { margin: var(--space-md) 0 var(--space-lg); border-radius: 10px; }

  .case-grid, .job-grid { grid-template-columns: 1fr; }
  .job-card { flex-direction: column; align-items: flex-start; }
  .job-card .btn { width: 100%; }

  .timeline { padding-left: 32px; }
  .timeline-item::before { left: -28px; }
  .float-consult { right: 16px; bottom: 20px; }
  .float-btn { width: 50px; height: 50px; }

  .section-head { margin-bottom: var(--space-md); }
  .course-banner { height: 100px; font-size: 22px; }
  .case-highlight .from, .case-highlight .to { font-size: 22px; }
}

/* 极小屏 */
@media (max-width: 380px) {
  .stat-num { font-size: 26px; }
  .hero h1 { font-size: 26px; }
}