/* =========================================================
   BFT ROBOTICS · 全站设计系统
   简约大气 / 白底 + 科技蓝 / 响应式
   ========================================================= */

/* ---------- 1. 设计令牌（变量） ---------- */
:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f7f9fc;
  --color-bg-deep: #0f172a;       /* 深色 Hero/CTA 备选 */
  --color-text: #1a1f36;
  --color-text-soft: #4b5469;
  --color-text-muted: #7a8499;
  --color-border: #e6eaf2;
  --color-border-soft: #f0f3f9;

  --color-brand: #2563eb;          /* 主色 蓝 */
  --color-brand-dark: #1d4ed8;
  --color-brand-light: #60a5fa;
  --color-accent: #0ea5e9;         /* 青色辅助 */
  --color-grad: linear-gradient(135deg, #2563eb 0%, #0ea5e9 100%);

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04), 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.06), 0 2px 4px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 20px 40px rgba(15, 23, 42, 0.10), 0 8px 16px rgba(15, 23, 42, 0.06);

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

  --container: 1200px;
  --gap: 24px;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans CN",
               "Noto Sans CJK SC", Roboto, Helvetica, Arial, sans-serif;

  --ease: cubic-bezier(.22,.61,.36,1);
}

/* ---------- 2. Reset & 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img, picture, svg { max-width: 100%; display: block; }
a { color: var(--color-brand); text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--color-brand-dark); }
button { font-family: inherit; cursor: pointer; border: 0; background: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4 { margin: 0; line-height: 1.25; font-weight: 700; color: var(--color-text); }
p { margin: 0; }

/* ---------- 3. 工具类 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: 96px 0; }
.section--alt { background: var(--color-bg-alt); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head .eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--color-brand);
  background: rgba(37, 99, 235, .08);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  margin-bottom: 16px;
  text-transform: uppercase;
}
.section-head h2 {
  font-size: clamp(28px, 3.4vw, 40px);
  margin-bottom: 14px;
  letter-spacing: -.5px;
}
.section-head p { color: var(--color-text-soft); font-size: 16px; }

/* ---------- 4. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 26px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 15px;
  transition: all .25s var(--ease);
  white-space: nowrap;
  border: 1px solid transparent;
}
.btn--primary {
  background: var(--color-grad);
  color: #fff;
  box-shadow: 0 8px 20px rgba(37, 99, 235, .25);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(37, 99, 235, .35); color: #fff; }
.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn--ghost:hover { background: var(--color-bg-alt); border-color: var(--color-text); color: var(--color-text); }
.btn--light {
  background: #fff;
  color: var(--color-brand);
}
.btn--light:hover { transform: translateY(-2px); color: var(--color-brand-dark); }

/* ---------- 5. 导航 ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .85);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid transparent;
  transition: all .3s var(--ease);
}
.site-header.is-scrolled {
  background: rgba(255, 255, 255, .96);
  border-bottom-color: var(--color-border-soft);
  box-shadow: var(--shadow-sm);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 19px;
  color: var(--color-text);
  letter-spacing: -.3px;
}
.brand-mark {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: var(--color-grad);
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 15px;
  letter-spacing: -.5px;
}
.brand-mark::after {
  content: "";
  position: absolute;
  inset: 6px;
  border: 2px solid rgba(255, 255, 255, .5);
  border-radius: 6px;
}
.brand small {
  display: block;
  font-size: 11px;
  color: var(--color-text-muted);
  font-weight: 500;
  letter-spacing: 3px;
  margin-top: 2px;
}
.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-list a {
  display: inline-block;
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-soft);
  border-radius: 8px;
  transition: all .2s var(--ease);
}
.nav-list a:hover { color: var(--color-text); background: var(--color-bg-alt); }
.nav-list a.active { color: var(--color-brand); background: rgba(37, 99, 235, .08); }
.nav-cta { margin-left: 8px; }
.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  border-radius: 8px;
  color: var(--color-text);
}
.nav-toggle:hover { background: var(--color-bg-alt); }
.nav-toggle svg { width: 22px; height: 22px; }

/* 移动端菜单 */
@media (max-width: 880px) {
  .nav-list {
    position: absolute;
    top: 72px; left: 16px; right: 16px;
    flex-direction: column;
    align-items: stretch;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 10px;
    box-shadow: var(--shadow-lg);
    gap: 2px;
    opacity: 0;
    transform: translateY(-8px);
    pointer-events: none;
    transition: all .25s var(--ease);
  }
  .nav-list.open { opacity: 1; transform: translateY(0); pointer-events: auto; }
  .nav-list a { padding: 12px 14px; }
  .nav-cta { margin: 8px 0 0; }
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
}

/* ---------- 6. Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15, 23, 42, .78) 0%, rgba(37, 99, 235, .55) 50%, rgba(14, 165, 233, .35) 100%);
  z-index: 2;
}
.hero__bg {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  z-index: 1;
}
.hero__inner {
  position: relative;
  z-index: 3;
  color: #fff;
  max-width: 760px;
}
.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(255, 255, 255, .12);
  border: 1px solid rgba(255, 255, 255, .25);
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 1px;
  margin-bottom: 22px;
  backdrop-filter: blur(6px);
}
.hero__eyebrow span {
  width: 6px; height: 6px; border-radius: 50%;
  background: #6ee7b7;
  box-shadow: 0 0 10px #6ee7b7;
}
.hero h1 {
  color: #fff;
  font-size: clamp(34px, 5.2vw, 64px);
  line-height: 1.1;
  letter-spacing: -1px;
  margin-bottom: 22px;
  font-weight: 800;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(135deg, #93c5fd 0%, #67e8f9 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p {
  font-size: clamp(16px, 1.5vw, 19px);
  color: rgba(255, 255, 255, .88);
  max-width: 620px;
  margin-bottom: 36px;
}
.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero__meta {
  position: relative;
  z-index: 3;
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, .18);
  color: rgba(255, 255, 255, .85);
  font-size: 14px;
}
.hero__meta strong { display: block; font-size: 28px; color: #fff; font-weight: 800; }

/* ---------- 7. 通用卡片 ---------- */
.card {
  background: #fff;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: all .3s var(--ease);
  position: relative;
  overflow: hidden;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.card__icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(37, 99, 235, .08);
  color: var(--color-brand);
  margin-bottom: 20px;
}
.card__icon svg { width: 26px; height: 26px; }
.card h3 { font-size: 19px; margin-bottom: 10px; }
.card p { color: var(--color-text-soft); font-size: 14.5px; line-height: 1.75; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--gap);
}

/* ---------- 8. 行业方案 ---------- */
.industry-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--gap);
}
.industry-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow-sm);
  transition: all .4s var(--ease);
  border: 1px solid var(--color-border-soft);
}
.industry-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.industry-card__img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  transition: transform .6s var(--ease);
}
.industry-card:hover .industry-card__img { transform: scale(1.06); }
.industry-card__body { padding: 28px; }
.industry-card__tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-brand);
  background: rgba(37, 99, 235, .1);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 12px;
  letter-spacing: .5px;
}
.industry-card h3 { font-size: 22px; margin-bottom: 10px; }
.industry-card p { color: var(--color-text-soft); font-size: 14.5px; }

/* ---------- 9. 数据统计条 ---------- */
.stats {
  background: var(--color-bg-deep);
  color: #fff;
  padding: 72px 0;
  position: relative;
  overflow: hidden;
}
.stats::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(37, 99, 235, .35), transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(14, 165, 233, .25), transparent 50%);
}
.stats .container { position: relative; }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--gap);
  text-align: center;
}
.stat strong {
  display: block;
  font-size: clamp(36px, 4.5vw, 56px);
  font-weight: 800;
  background: linear-gradient(135deg, #93c5fd 0%, #67e8f9 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
  margin-bottom: 8px;
}
.stat span { font-size: 14px; color: rgba(255, 255, 255, .7); letter-spacing: 1px; }

/* ---------- 10. 产品卡片 ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--gap);
}
.product-card {
  background: #fff;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-lg);
  transition: all .3s var(--ease);
  display: flex;
  flex-direction: column;
}
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: transparent; }
.product-card__media {
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--color-bg-alt);
}
.product-card__media img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .5s var(--ease);
}
.product-card:hover .product-card__media img { transform: scale(1.05); }
.product-card__body { padding: 24px; }
.product-card__cat {
  font-size: 12px;
  color: var(--color-brand);
  background: rgba(37, 99, 235, .08);
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  display: inline-block;
  margin-bottom: 12px;
  font-weight: 600;
}
.product-card h3 { font-size: 18px; margin-bottom: 8px; }
.product-card p { color: var(--color-text-soft); font-size: 14px; line-height: 1.7; margin-bottom: 16px; }
.product-card__meta {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 14px;
  border-top: 1px solid var(--color-border-soft);
  font-size: 13px;
  color: var(--color-text-muted);
}
.product-card__meta strong { color: var(--color-text); font-weight: 600; }

/* 产品详情卡片（协作机器人特色区） */
.product-grid--detail {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
@media (max-width: 880px) { .product-grid--detail { grid-template-columns: 1fr; gap: 20px; } }
.product-card--detail {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 28px;
  align-items: stretch;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-lg);
  transition: all .3s var(--ease);
}
@media (max-width: 520px) { .product-card--detail { grid-template-columns: 1fr; gap: 16px; padding: 20px; } }
.product-card--detail:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: transparent; }
.product-card--detail .product-card__media {
  aspect-ratio: 1/1;
  background: #fff;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-soft);
  overflow: hidden;
}
.product-card--detail .product-card__body { padding: 0; display: flex; flex-direction: column; justify-content: center; }
.product-card--detail h3 { font-size: 20px; margin-bottom: 8px; }
.product-card--detail p { color: var(--color-text-soft); font-size: 14.5px; line-height: 1.75; margin-bottom: 18px; }
.product-card--detail .product-card__meta { border-top: 1px solid var(--color-border-soft); padding-top: 14px; }
.product-card--detail .product-card__meta strong { color: var(--color-brand); font-weight: 700; }
@media (max-width: 520px) {
  .product-card--detail .product-card__media { max-width: 100%; aspect-ratio: 4/3; }
}

/* 双臂机器人特色区：标题与图片左右穿插布局 */
.dualarm-list {
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.dualarm-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 44px;
  align-items: center;
  background: #fff;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all .3s var(--ease);
}
@media (max-width: 880px) {
  .dualarm-row { grid-template-columns: 1fr; gap: 24px; padding: 24px; }
}
.dualarm-row:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: transparent; }
.dualarm-row--reverse .dualarm-row__media { order: 2; }
@media (max-width: 880px) { .dualarm-row--reverse .dualarm-row__media { order: 0; } }
.dualarm-row__media {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border-soft);
  background: #fff;
}
.dualarm-row__media img { width: 100%; height: 100%; aspect-ratio: 4/3; object-fit: contain; }
.dualarm-row__text .product-card__cat { margin-bottom: 14px; }
.dualarm-row__text h3 { font-size: 24px; margin-bottom: 12px; letter-spacing: -.3px; }
.dualarm-row__text p { color: var(--color-text-soft); font-size: 15.5px; line-height: 1.8; }

/* 产品筛选器 */
.filter-bar {
  display: flex; flex-wrap: wrap; gap: 10px;
  justify-content: center;
  margin-bottom: 48px;
}
.empty-state {
  text-align: center;
  padding: 72px 24px 48px;
  color: var(--color-text-soft);
}
.empty-state svg { color: var(--color-brand); margin-bottom: 16px; opacity: .6; }
.empty-state h3 { font-size: 20px; color: var(--color-text); margin-bottom: 10px; }
.empty-state p { font-size: 14.5px; max-width: 480px; margin: 0 auto; }
.filter-btn {
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-soft);
  background: #fff;
  border: 1px solid var(--color-border);
  transition: all .25s var(--ease);
}
.filter-btn:hover { color: var(--color-brand); border-color: var(--color-brand); }
.filter-btn.is-active {
  background: var(--color-brand);
  color: #fff;
  border-color: var(--color-brand);
  box-shadow: 0 6px 14px rgba(37, 99, 235, .25);
}

/* ---------- 11. 关于 / 公司页 ---------- */
.about-hero {
  padding: 160px 0 96px;
  background: linear-gradient(135deg, #f7f9fc 0%, #ffffff 50%, #eef4ff 100%);
  text-align: center;
}
.about-hero h1 { font-size: clamp(32px, 4vw, 48px); margin-bottom: 16px; }
.about-hero p { color: var(--color-text-soft); font-size: 17px; max-width: 700px; margin: 0 auto; }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.about-grid img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}
.about-grid h2 { font-size: clamp(24px, 2.6vw, 32px); margin-bottom: 16px; }
.about-grid p { color: var(--color-text-soft); margin-bottom: 14px; font-size: 15.5px; }
@media (max-width: 880px) { .about-grid { grid-template-columns: 1fr; gap: 36px; } }

.mvv-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--gap);
}
.mvv-card {
  padding: 36px 28px;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-soft);
  position: relative;
  transition: all .3s var(--ease);
}
.mvv-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.mvv-card__num {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-brand);
  letter-spacing: 3px;
  margin-bottom: 16px;
}
.mvv-card h3 { font-size: 22px; margin-bottom: 12px; }
.mvv-card p { color: var(--color-text-soft); font-size: 14.5px; }

/* 时间线 */
.timeline { position: relative; max-width: 800px; margin: 0 auto; }
.timeline::before {
  content: "";
  position: absolute;
  left: 110px;
  top: 0; bottom: 0;
  width: 2px;
  background: var(--color-border);
}
.timeline-item {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 40px;
  padding: 24px 0;
  position: relative;
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: 102px;
  top: 32px;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: #fff;
  border: 4px solid var(--color-brand);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, .12);
}
.timeline-item .year {
  font-size: 22px;
  font-weight: 800;
  color: var(--color-brand);
  text-align: right;
}
.timeline-item .event {
  background: #fff;
  padding: 20px 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-soft);
}
.timeline-item .event h4 { font-size: 17px; margin-bottom: 6px; }
.timeline-item .event p { color: var(--color-text-soft); font-size: 14px; }
@media (max-width: 640px) {
  .timeline::before, .timeline-item::before { display: none; }
  .timeline-item { grid-template-columns: 1fr; gap: 6px; padding-left: 0; }
  .timeline-item .year { text-align: left; font-size: 18px; }
}

/* 服务流程 */
.process-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  counter-reset: step;
}
.process-step {
  counter-increment: step;
  text-align: center;
  padding: 28px 16px;
  background: #fff;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-md);
  position: relative;
  transition: all .3s var(--ease);
}
.process-step:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.process-step::before {
  content: counter(step, decimal-leading-zero);
  display: block;
  width: 44px; height: 44px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--color-grad);
  color: #fff;
  font-weight: 700;
  font-size: 16px;
  line-height: 44px;
}
.process-step h4 { font-size: 16px; margin-bottom: 6px; }
.process-step p { color: var(--color-text-muted); font-size: 13px; }
@media (max-width: 880px) { .process-grid { grid-template-columns: repeat(2, 1fr); } }

/* 合作品牌墙 */
.brand-wall {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--gap);
}
.brand-tile {
  aspect-ratio: 3/2;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: .5px;
  transition: all .3s var(--ease);
}
.brand-tile:hover { color: var(--color-brand); border-color: var(--color-brand); transform: translateY(-2px); }

/* ---------- 12. 联系页 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 640px);
  justify-content: center;
  gap: 48px;
  align-items: start;
}
@media (max-width: 880px) { .contact-grid { grid-template-columns: 1fr; gap: 36px; } }

.info-card {
  background: #fff;
  padding: 36px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-soft);
}
.info-list { display: grid; gap: 22px; }
.info-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}
.info-item__icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: rgba(37, 99, 235, .08);
  color: var(--color-brand);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.info-item__icon svg { width: 20px; height: 20px; }
.info-item h4 { font-size: 15px; margin-bottom: 4px; color: var(--color-text); }
.info-item p { color: var(--color-text-soft); font-size: 14px; line-height: 1.6; }

/* ---------- 13. CTA 区块 ---------- */
.cta-band {
  position: relative;
  padding: 96px 0;
  background: var(--color-bg-deep);
  color: #fff;
  text-align: center;
  overflow: hidden;
}
.cta-band::before {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(circle at 30% 50%, rgba(37, 99, 235, .5), transparent 60%),
    radial-gradient(circle at 70% 50%, rgba(14, 165, 233, .35), transparent 60%);
}
.cta-band .container { position: relative; }
.cta-band h2 { color: #fff; font-size: clamp(28px, 3.4vw, 40px); margin-bottom: 16px; }
.cta-band p { color: rgba(255, 255, 255, .8); max-width: 640px; margin: 0 auto 32px; font-size: 16px; }
.cta-band__actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---------- 14. 页脚 ---------- */
.site-footer {
  background: #0a0f1f;
  color: rgba(255, 255, 255, .7);
  padding: 72px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 48px;
  margin-bottom: 56px;
}
@media (max-width: 880px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; } }
@media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-col h5 { color: #fff; font-size: 15px; margin-bottom: 18px; letter-spacing: .5px; }
.footer-col ul li { margin-bottom: 10px; font-size: 14px; }
.footer-col a { color: rgba(255, 255, 255, .65); transition: color .2s var(--ease); }
.footer-col a:hover { color: #fff; }
.footer-brand p { color: rgba(255, 255, 255, .55); font-size: 14px; line-height: 1.7; margin-top: 16px; max-width: 320px; }
.footer-contact { font-size: 13px; color: rgba(255, 255, 255, .55); line-height: 1.9; }
.footer-contact strong { color: #fff; font-weight: 500; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .08);
  padding-top: 28px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, .45);
}

/* ---------- 15. 滚动渐入动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: .1s; }
.reveal-delay-2 { transition-delay: .2s; }
.reveal-delay-3 { transition-delay: .3s; }

/* ---------- 16. 工具：占位水印遮罩（隐藏 AI 图水印） ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
}
.media-frame::after {
  content: "";
  position: absolute;
  right: -30px;
  bottom: -30px;
  width: 140px;
  height: 140px;
  background: linear-gradient(135deg, transparent 50%, rgba(255, 255, 255, .65) 60%);
  pointer-events: none;
}

/* ---------- 17. 通用响应式微调 ---------- */
@media (max-width: 880px) {
  .section { padding: 72px 0; }
  .hero { padding: 120px 0 64px; min-height: auto; }
  .hero__meta { margin-top: 40px; gap: 22px; }
  .hero__meta strong { font-size: 22px; }
}