/* ============================================================
   苏州电牛智能科技有限公司 · 官网样式 v2
   设计语言：黑底电影感（参考影视飓风 ysjf.com）
   —— 全屏大图 Hero、左对齐「英文小标+中文大标」分区、
      大尺寸媒体卡片、透明→白色导航
   ============================================================ */

:root {
  --black: #000000;
  --panel: #0d0d0d;
  --panel-2: #131313;
  --line: #1f1f1f;
  --line-2: #2a2a2a;
  --white: #ffffff;
  --text: #b3b3b3;
  --muted: #7a7a7a;
  --faint: #565656;
  --heading: #f2f2f2;
  --blue: #3e6ae1;
  --blue-dark: #3457b1;
  --radius: 10px;
  --header-h: 72px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
    "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--black);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden; /* 通栏横滑区 100vw 与滚动条的宽度差补偿 */
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
::selection { background: var(--blue); color: #fff; }

.container { max-width: 1280px; margin: 0 auto; padding: 0 32px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 40px;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 1px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.25s, color 0.25s, border-color 0.25s, transform 0.25s;
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--blue); color: var(--white); }
.btn-primary:hover { background: var(--blue-dark); }
.btn-light { background: var(--white); color: #111; }
.btn-light:hover { background: #e8e8e8; }
.btn-dark { background: var(--heading); color: #111; }
.btn-dark:hover { background: var(--white); }
.btn-outline { background: transparent; color: var(--heading); border-color: #3a3a3a; }
.btn-outline:hover { border-color: var(--white); }
.btn-outline-light { background: rgba(255,255,255,0.06); color: var(--white); border-color: rgba(255,255,255,0.45); }
.btn-outline-light:hover { border-color: var(--white); background: rgba(255,255,255,0.12); }
.btn-sm { padding: 9px 24px; font-size: 14px; }

/* ---------- 顶部导航（透明 → 白色） ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: transparent;
  z-index: 100;
  transition: background 0.35s, box-shadow 0.35s;
}
.site-header .header-inner { border-bottom: 1px solid transparent; transition: border-color 0.35s; }
.site-header.solid {
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(0,0,0,0.06);
}
.header-inner {
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 32px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.logo-bull {
  height: 34px;
  width: auto;
  object-fit: contain;
  display: block;
}
.logo-bull.dark-only { display: none; }
.site-header.solid .logo-bull.light-only { display: none; }
.site-header.solid .logo-bull.dark-only { display: block; }
.logo-text { display: flex; flex-direction: column; line-height: 1.15; }
.logo-name { font-size: 18px; font-weight: 800; color: var(--white); letter-spacing: 2px; transition: color 0.35s; }
.logo-sub { font-size: 9px; color: #8d8d8d; letter-spacing: 4px; transition: color 0.35s; }
.site-header.solid .logo-name { color: #111; }
.site-header.solid .logo-sub { color: #888; }

.main-nav { display: flex; align-items: center; gap: 6px; }
.nav-item { position: relative; }
.nav-link {
  display: block;
  padding: 10px 18px;
  font-size: 15px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.92);
  border-radius: 6px;
  transition: color 0.25s, background 0.25s;
}
.nav-link:hover { color: var(--white); background: rgba(255,255,255,0.1); }
.nav-link.active { color: var(--white); }
.nav-link.active::after {
  content: "";
  display: block;
  height: 2px;
  background: var(--blue);
  border-radius: 2px;
  margin-top: 3px;
}
.site-header.solid .nav-link { color: #333; }
.site-header.solid .nav-link:hover { color: #000; background: rgba(0,0,0,0.05); }
.site-header.solid .nav-link.active { color: #000; }

.dropdown-menu {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 210px;
  background: #101010;
  border: 1px solid var(--line-2);
  border-radius: 12px;
  box-shadow: 0 16px 40px rgba(0,0,0,0.5);
  padding: 10px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s, transform 0.25s, visibility 0.25s;
}
.nav-item:hover .dropdown-menu,
.nav-item.open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.dropdown-menu a {
  display: block;
  padding: 10px 16px;
  font-size: 14px;
  color: #c9c9c9;
  border-radius: 8px;
  white-space: nowrap;
}
.dropdown-menu a:hover { background: #1c1c1c; color: var(--white); }
.dd-num {
  display: inline-block;
  min-width: 24px;
  color: var(--faint);
  font-size: 11px;
  letter-spacing: 1px;
}
.dropdown-menu a:hover .dd-num { color: #9a9a9a; }

.header-phone {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 15px;
  font-weight: 600;
  color: var(--white);
  flex-shrink: 0;
  letter-spacing: 0.5px;
  transition: color 0.25s;
}
.header-phone svg { width: 17px; height: 17px; stroke: var(--blue); }
.header-phone:hover { color: var(--blue); }
.site-header.solid .header-phone { color: #111; }
.site-header.solid .header-phone:hover { color: var(--blue); }

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  width: 24px; height: 2px;
  background: var(--white);
  transition: transform 0.3s, opacity 0.3s, background 0.3s;
}
.site-header.solid .nav-toggle span { background: #111; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端菜单 */
.mobile-menu {
  position: fixed;
  top: var(--header-h);
  left: 0; right: 0; bottom: 0;
  background: #050505;
  z-index: 99;
  padding: 28px 28px 60px;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform 0.35s ease;
}
.mobile-menu.open { transform: translateX(0); }
.mobile-menu > a,
.mobile-menu .mm-group > a {
  display: block;
  padding: 15px 4px;
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
  border-bottom: 1px solid var(--line);
}
.mobile-menu .mm-sub a {
  display: block;
  padding: 11px 4px 11px 22px;
  font-size: 15px;
  color: var(--muted);
  border-bottom: 1px solid #141414;
}
.mobile-menu .active { color: var(--blue); }

/* ---------- Hero 全屏 ---------- */
.hero {
  position: relative;
  height: 100vh;
  min-height: 640px;
  background: var(--black);
  overflow: hidden;
  color: var(--white);
}
.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 1.1s ease, visibility 1.1s;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 90px 24px 110px;
}
.hero-slide.active { opacity: 1; visibility: visible; z-index: 2; }
.hero-bg {
  position: absolute;
  inset: -6%;
  width: 112%; height: 112%;
  object-fit: cover;
  opacity: 0.34;
  animation: kenburns 22s ease-in-out infinite alternate;
}
.hero-bg.bull { object-fit: contain; opacity: 0.24; padding: 130px; }
.hero-bg.invert { filter: invert(1); opacity: 0.1; }
@keyframes kenburns {
  from { transform: scale(1) translateY(0); }
  to { transform: scale(1.12) translateY(-1.5%); }
}
.hero-slide::after {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at center, rgba(0,0,0,0.05) 0%, rgba(0,0,0,0.55) 100%),
    linear-gradient(180deg, rgba(0,0,0,0.55) 0%, rgba(0,0,0,0.12) 40%, rgba(0,0,0,0.8) 100%);
}
.hero-slide > .hero-content { position: relative; z-index: 3; max-width: 980px; }
.hero-tag {
  font-size: 13px;
  letter-spacing: 8px;
  color: #8f8f8f;
  text-transform: uppercase;
  margin-bottom: 38px;
}
.hero-title {
  font-size: clamp(40px, 6.6vw, 86px);
  font-weight: 900;
  letter-spacing: 4px;
  line-height: 1.22;
  margin-bottom: 34px;
  text-shadow: 0 4px 40px rgba(0,0,0,0.6);
}
/* 短口号（≤6字）自动加大加宽，呼应电影感排版 */
.hero-title-lg {
  font-size: clamp(64px, 11vw, 138px);
  letter-spacing: clamp(8px, 2.5vw, 32px);
  text-indent: clamp(8px, 2.5vw, 32px); /* 抵消末字字距，保持视觉居中 */
  margin-bottom: 46px;
}
.hero-sub {
  font-size: clamp(15px, 1.6vw, 18px);
  color: #bdbdbd;
  margin-bottom: 54px;
  letter-spacing: 1.5px;
}
.hero-actions { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; }
.hero-dots {
  position: absolute;
  bottom: 42px; left: 50%;
  transform: translateX(-50%);
  display: flex; gap: 12px;
  z-index: 5;
}
.hero-dots button {
  width: 32px; height: 3px;
  border: none;
  background: rgba(255, 255, 255, 0.25);
  cursor: pointer;
  transition: background 0.3s;
  padding: 0;
  border-radius: 2px;
}
.hero-dots button.active { background: var(--white); }
.hero-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 5;
  width: 46px; height: 46px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.3);
  background: rgba(0, 0, 0, 0.35);
  color: var(--white);
  font-size: 20px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.3s, background 0.3s;
  display: flex; align-items: center; justify-content: center;
}
.hero:hover .hero-arrow { opacity: 1; }
.hero-arrow:hover { background: rgba(0, 0, 0, 0.65); }
.hero-arrow.prev { left: 30px; }
.hero-arrow.next { right: 30px; }
.hero-scroll {
  position: absolute;
  bottom: 38px; left: 50%;
  transform: translateX(-50%);
  z-index: 5;
  width: 22px; height: 36px;
  border: 2px solid rgba(255,255,255,0.4);
  border-radius: 12px;
}
.hero-scroll::after {
  content: "";
  position: absolute;
  top: 6px; left: 50%;
  width: 3px; height: 7px;
  margin-left: -1.5px;
  border-radius: 2px;
  background: rgba(255,255,255,0.7);
  animation: scrollhint 1.8s ease-in-out infinite;
}
@keyframes scrollhint {
  0% { transform: translateY(0); opacity: 1; }
  70% { transform: translateY(12px); opacity: 0; }
  100% { transform: translateY(0); opacity: 0; }
}
.hero.has-scroll .hero-dots { bottom: 92px; }

/* ---------- 分区（黑底 + 左对齐标题） ---------- */
.section { padding: 130px 0; position: relative; }
.section + .section { border-top: 1px solid var(--line); }

.sec-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 56px;
}
.sec-head-left .sec-en {
  display: block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 6px;
  text-transform: uppercase;
  color: #6a6a6a;
  margin-bottom: 12px;
}
.sec-head-left .sec-cn {
  font-size: clamp(28px, 4vw, 46px);
  font-weight: 800;
  color: #454545; /* 暗灰标题，黑底上若隐若现（ysjf 签名式处理） */
  letter-spacing: 3px;
  line-height: 1.25;
}
.sec-head-left .sec-desc {
  margin-top: 14px;
  font-size: 15.5px;
  color: var(--muted);
  max-width: 640px;
}
.sec-more {
  flex-shrink: 0;
  width: 52px; height: 52px;
  border: 1px solid var(--line-2);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #9a9a9a;
  font-size: 24px;
  font-weight: 300;
  transition: border-color 0.3s, color 0.3s, transform 0.3s;
}
.sec-more:hover { border-color: var(--white); color: var(--white); transform: rotate(90deg); }

/* ---------- 数据带 ---------- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.stat-num {
  font-size: clamp(40px, 5vw, 62px);
  font-weight: 900;
  color: var(--white);
  line-height: 1.2;
  letter-spacing: 1px;
}
.stat-num sup { font-size: 0.45em; font-weight: 700; color: var(--blue); }
.stat-label { font-size: 14px; color: var(--muted); margin-top: 10px; letter-spacing: 1px; }

/* ---------- 公司简介 ---------- */
.about-intro { max-width: 820px; margin: 0 auto; text-align: center; }
.about-intro p { color: var(--text); font-size: 16.5px; margin-bottom: 20px; }

/* ---------- 服务卡片 ---------- */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.service-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 44px 36px;
  display: flex;
  flex-direction: column;
  transition: transform 0.35s, border-color 0.35s, background 0.35s;
}
.service-card:hover {
  transform: translateY(-6px);
  border-color: #3d3d3d;
  background: var(--panel-2);
}
.service-icon {
  width: 46px; height: 46px;
  color: var(--blue);
  margin-bottom: 28px;
}
.service-icon svg { width: 100%; height: 100%; }
.card-num, .ct-num {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--faint);
  margin-bottom: 8px;
}
.service-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--heading);
  margin-bottom: 12px;
  letter-spacing: 1px;
}
.service-card p { font-size: 14px; color: var(--muted); flex: 1; line-height: 1.8; }
.card-link {
  margin-top: 26px;
  font-size: 14px;
  font-weight: 600;
  color: var(--blue);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.card-link:hover { text-decoration: underline; }

/* ---------- 案例横向滑动（通栏，卡片冲出屏幕两侧） ---------- */
.case-rail-wrap {
  /* 负边距突破 .container，实现 ysjf 式通栏滑动 */
  margin: 0 calc(50% - 50vw);
  padding: 0 max(32px, calc(50vw - 640px));
  overflow: hidden;
}
.case-rail {
  display: flex;
  gap: 22px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 4px max(32px, calc(50vw - 640px)) 18px;
  margin: -4px calc(-1 * max(32px, calc(50vw - 640px))) 0;
  cursor: grab;
  scrollbar-width: none;
}
.case-rail::-webkit-scrollbar { display: none; }
.case-rail.dragging { cursor: grabbing; scroll-snap-type: none; }
.case-slide {
  flex: 0 0 720px;
  max-width: 86vw;
  scroll-snap-align: center;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  transition: border-color 0.35s, transform 0.35s;
}
.case-slide:hover { border-color: #3d3d3d; transform: translateY(-4px); }
.case-slide .cs-media {
  background: #101010;
  height: 400px;
  padding: 28px;
  display: flex; align-items: center; justify-content: center;
}
.case-slide .cs-media img { max-height: 100%; object-fit: contain; }
.case-slide .cs-body { padding: 26px 30px 30px; }
.case-slide .cs-body h3 { font-size: 21px; font-weight: 700; color: var(--heading); margin-bottom: 10px; }
.case-slide .cs-body p { font-size: 14px; color: var(--muted); margin-bottom: 16px; }
.case-rail-hint {
  margin-top: 14px;
  font-size: 12.5px;
  color: var(--faint);
  letter-spacing: 2px;
  text-align: center;
}

/* ---------- 标签胶囊 ---------- */
.meta-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.meta-chips span {
  font-size: 12px;
  color: #a8a8a8;
  background: var(--panel-2);
  border: 1px solid var(--line-2);
  border-radius: 999px;
  padding: 4px 14px;
  letter-spacing: 0.5px;
}

/* ---------- 软件展示（1 大 + 4 小） ---------- */
.showcase-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  grid-template-rows: auto auto;
  gap: 20px;
}
.show-card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
  transition: border-color 0.35s, transform 0.35s;
  display: block;
}
.show-card:hover { border-color: #3d3d3d; transform: translateY(-4px); }
.show-card.feature { grid-row: span 2; }
.show-card .sc-media {
  background: #0b0b0b;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.show-card .sc-media img {
  width: 100%; height: 100%; object-fit: cover; object-position: top;
  transition: transform 0.5s ease;
}
.show-card:hover .sc-media img { transform: scale(1.03); }
.show-card.feature .sc-media { height: 460px; }
.show-card:not(.feature) .sc-media { height: 200px; }
.show-card .sc-body { padding: 20px 24px 22px; }
.show-card .sc-body h3 { font-size: 17px; font-weight: 700; color: var(--heading); margin-bottom: 8px; }
.show-card.feature .sc-body h3 { font-size: 21px; }
.show-card .sc-body p {
  font-size: 13px; color: var(--muted); display: none;
}
.show-card.feature .sc-body p { display: block; }
.show-card .sc-badge {
  display: inline-block;
  font-size: 11px;
  color: var(--blue);
  border: 1px solid rgba(62, 106, 225, 0.5);
  border-radius: 999px;
  padding: 2px 12px;
  margin-bottom: 10px;
  letter-spacing: 1px;
}

/* ---------- 优势 ---------- */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 36px;
}
.adv-item { border-top: 1px solid var(--line-2); padding-top: 30px; }
.adv-num {
  font-size: 46px;
  font-weight: 900;
  color: transparent;
  -webkit-text-stroke: 1px #3a3a3a;
  line-height: 1;
}
.adv-item h3 { font-size: 20px; font-weight: 700; color: var(--heading); margin: 18px 0 12px; letter-spacing: 1px; }
.adv-item p { font-size: 14px; color: var(--muted); }

/* ---------- 行业 ---------- */
.industry-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
}
.industry-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 44px 24px;
  text-align: center;
  background: var(--panel);
  transition: border-color 0.3s, transform 0.3s, background 0.3s;
}
.industry-item:hover { border-color: #3d3d3d; transform: translateY(-4px); background: var(--panel-2); }
.industry-icon { width: 42px; height: 42px; margin: 0 auto 20px; color: var(--blue); }
.industry-icon svg { width: 100%; height: 100%; }
.industry-item h3 { font-size: 18px; font-weight: 700; color: var(--heading); margin-bottom: 8px; letter-spacing: 1px; }
.industry-item p { font-size: 13px; color: var(--muted); }

/* ---------- 品牌墙 ---------- */
.brand-wall {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 14px;
}
.brand-wall-img { width: 100%; height: auto; display: block; }
.brand-chip {
  border: 1px solid #242424;
  border-radius: 10px;
  overflow: hidden;
  background: #191919;
  transition: border-color 0.3s;
}
.brand-chip:hover { border-color: #3d3d3d; }
.brand-chip img { display: block; width: 100%; height: 96px; object-fit: contain; background: #191919; }
.brand-cn { font-size: 16px; font-weight: 700; color: #d6d6d6; line-height: 1.4; }
.brand-en { font-size: 10px; color: var(--faint); letter-spacing: 2px; text-transform: uppercase; }

/* ---------- CTA ---------- */
.cta-section { position: relative; overflow: hidden; }
.cta-bull {
  position: absolute;
  right: -40px; bottom: -90px;
  width: 420px;
  opacity: 0.1;
  pointer-events: none;
}
.cta-section h2 {
  font-size: clamp(30px, 4.4vw, 48px);
  font-weight: 900;
  color: var(--white);
  margin-bottom: 16px;
  letter-spacing: 3px;
  position: relative;
  z-index: 2;
}
.cta-section p { color: var(--muted); font-size: 16px; margin-bottom: 40px; position: relative; z-index: 2; }
.cta-actions { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; position: relative; z-index: 2; }

/* ---------- 页脚（品牌家族行 + 四栏 + 备案行） ---------- */
.site-footer { background: var(--black); border-top: 1px solid var(--line); padding: 64px 0 36px; }
.brand-family {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: clamp(30px, 6vw, 90px);
  flex-wrap: wrap;
  padding-bottom: 64px;
  margin-bottom: 64px;
  border-bottom: 1px solid var(--line);
}
.bf-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  color: #4a4a4a;
  transition: color 0.3s, transform 0.3s;
}
.bf-item svg { width: 44px; height: 44px; }
.bf-name { font-size: 13px; letter-spacing: 2px; white-space: nowrap; }
.bf-item:hover { color: #eaeaea; transform: translateY(-3px); }
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.4fr;
  gap: 44px;
  margin-bottom: 52px;
}
.footer-brand .logo { margin-bottom: 18px; }
.footer-brand p { font-size: 13.5px; color: var(--muted); max-width: 300px; }
.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--heading);
  letter-spacing: 2px;
  margin-bottom: 20px;
}
.footer-col a { display: block; font-size: 13.5px; color: var(--muted); padding: 6px 0; transition: color 0.25s; }
.footer-col a:hover { color: var(--white); }
.footer-col p { font-size: 13.5px; color: var(--muted); padding: 6px 0; }
.footer-col p a:hover { color: var(--white); }
.footer-col p strong { color: var(--heading); }
.footer-phone { font-size: 22px !important; font-weight: 800; color: var(--white) !important; letter-spacing: 1px; }
.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 26px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 32px;
  font-size: 12.5px;
  color: var(--faint);
  text-align: center;
}

/* ---------- 悬浮电话 / 移动吸底 ---------- */
.float-call {
  position: fixed;
  right: 26px; bottom: 30px;
  z-index: 90;
  width: 56px; height: 56px;
  border-radius: 50%;
  background: var(--blue);
  color: var(--white);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 24px rgba(62, 106, 225, 0.45);
  transition: transform 0.3s;
}
.float-call:hover { transform: scale(1.1); }
.float-call svg { width: 23px; height: 23px; }
.mobile-callbar { display: none; }

/* ---------- 子页面 ---------- */
.page-hero { background: var(--black); padding: 170px 0 64px; text-align: center; }
.breadcrumb {
  font-size: 13px;
  color: var(--faint);
  margin-bottom: 20px;
  letter-spacing: 1px;
}
.breadcrumb a:hover { color: var(--blue); }
.breadcrumb .sep { margin: 0 10px; }
.page-hero h1 {
  font-size: clamp(34px, 5vw, 52px);
  font-weight: 900;
  color: var(--heading);
  letter-spacing: 3px;
  margin-bottom: 16px;
}
.page-hero .page-desc { color: var(--muted); max-width: 680px; margin: 0 auto; font-size: 15.5px; }

.content-section { padding: 90px 0; }
.prose { max-width: 860px; margin: 0 auto; }
.prose p { margin-bottom: 18px; font-size: 15.5px; line-height: 2; color: var(--text); }
.prose h2 { font-size: 26px; color: var(--heading); margin: 40px 0 18px; font-weight: 800; letter-spacing: 1px; }

.figure {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px;
  margin: 36px auto;
  max-width: 1000px;
}
.figure img { width: 100%; }
.figure figcaption { text-align: center; font-size: 13px; color: var(--faint); margin-top: 18px; letter-spacing: 1px; }

.spec-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  max-width: 1000px;
  margin: 44px auto;
}
.spec-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 34px;
  background: var(--panel);
}
.spec-card h3 {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--faint);
  text-transform: uppercase;
  margin-bottom: 18px;
}
.spec-card ul li {
  padding: 9px 0;
  font-size: 14.5px;
  color: var(--text);
  border-bottom: 1px solid #161616;
  display: flex;
  gap: 10px;
}
.spec-card ul li:last-child { border-bottom: none; }
.spec-card ul li::before { content: "·"; color: var(--blue); font-weight: 700; }

.brand-chips { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin: 36px 0; }
.brand-chips span {
  border: 1px solid var(--line-2);
  border-radius: 999px;
  padding: 9px 22px;
  font-size: 13.5px;
  color: #cfcfcf;
  background: var(--panel);
}

.check-list { max-width: 860px; margin: 24px auto; }
.check-list li {
  display: flex;
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px solid #161616;
  font-size: 15px;
  color: var(--text);
}
.check-list li svg { width: 20px; height: 20px; flex-shrink: 0; margin-top: 4px; stroke: var(--blue); }

.case-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 70px;
  padding-top: 36px;
  border-top: 1px solid var(--line);
}
.case-nav a { display: block; }
.case-nav .cn-label { font-size: 12px; color: var(--faint); letter-spacing: 3px; margin-bottom: 8px; }
.case-nav .cn-title { font-size: 16px; font-weight: 600; color: var(--heading); }
.case-nav a:hover .cn-title { color: var(--blue); }
.case-nav .next { text-align: right; }

/* ---------- 案例总览卡片（软件展示页） ---------- */
.case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.case-tile {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.35s, border-color 0.35s;
  display: flex;
  flex-direction: column;
}
.case-tile:hover { transform: translateY(-4px); border-color: #3d3d3d; }
.case-tile .ct-media { background: #0b0b0b; border-bottom: 1px solid var(--line); }
.case-tile .ct-media img { width: 100%; height: 240px; object-fit: cover; object-position: top; }
.case-tile .ct-body { padding: 28px 30px 30px; flex: 1; display: flex; flex-direction: column; }
.case-tile h3 { font-size: 20px; font-weight: 700; color: var(--heading); margin-bottom: 10px; letter-spacing: 1px; }
.case-tile p { font-size: 14px; color: var(--muted); flex: 1; margin-bottom: 18px; }
.case-tile .ct-media.contain { background: #101010; padding: 24px; display: flex; align-items: center; justify-content: center; }
.case-tile .ct-media.contain img { object-fit: contain; height: 200px; }

/* ---------- 联系页 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  max-width: 1040px;
  margin: 0 auto;
}
.contact-form { display: flex; flex-direction: column; gap: 16px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-input, .form-textarea {
  width: 100%;
  border: 1px solid var(--line-2);
  border-radius: 10px;
  padding: 14px 18px;
  font-size: 14.5px;
  font-family: var(--font);
  color: var(--heading);
  background: var(--panel);
  transition: border-color 0.25s, background 0.25s;
}
.form-input::placeholder, .form-textarea::placeholder { color: var(--faint); }
.form-input:focus, .form-textarea:focus { outline: none; border-color: var(--blue); background: #101018; }
.form-textarea { min-height: 150px; resize: vertical; }
.form-result {
  display: none;
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 24px;
  font-size: 14px;
  color: var(--text);
}
.form-result.show { display: block; }
.form-result strong { color: var(--white); }
.contact-info { display: flex; flex-direction: column; gap: 24px; }
.info-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 32px;
  background: var(--panel);
}
.info-card h3 { font-size: 13px; letter-spacing: 3px; color: var(--faint); font-weight: 600; margin-bottom: 12px; }
.info-card .big { font-size: 26px; font-weight: 800; color: var(--white); letter-spacing: 1px; }
.info-card p { font-size: 14.5px; color: var(--text); }
.map-wrap { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); }

/* ---------- 滚动显现 ---------- */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.8s ease, transform 0.8s ease; }
.reveal.visible { opacity: 1; transform: none; }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .showcase-grid { grid-template-columns: 1fr 1fr; }
  .show-card.feature { grid-column: span 2; grid-row: auto; }
  .brand-wall { grid-template-columns: repeat(4, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .main-nav .nav-link { padding: 10px 12px; }
  .case-slide { flex-basis: 620px; }
  .case-slide .cs-media { height: 340px; }
}

@media (max-width: 900px) {
  .main-nav { display: none; }
  .header-phone { display: none; }
  .nav-toggle { display: flex; }
  .advantage-grid { grid-template-columns: repeat(2, 1fr); gap: 28px; }
  .industry-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
  .contact-grid { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: 1fr; }
  .hero-arrow { display: none; }
  .sec-head { flex-direction: row; }
  .spec-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .container { padding: 0 22px; }
  .section { padding: 72px 0; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 36px 16px; }
  .service-grid { grid-template-columns: 1fr; }
  .showcase-grid { grid-template-columns: 1fr; }
  .show-card.feature { grid-column: auto; }
  .show-card.feature .sc-media { height: 260px; }
  .brand-wall { grid-template-columns: repeat(2, 1fr); }
  .industry-grid { grid-template-columns: 1fr 1fr; gap: 14px; }
  .industry-item { padding: 32px 14px; }
  .advantage-grid { grid-template-columns: 1fr; gap: 26px; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .form-row { grid-template-columns: 1fr; }
  .case-nav { grid-template-columns: 1fr; }
  .case-nav .next { text-align: left; }
  .hero { min-height: 580px; }
  .hero-bg.bull { padding: 140px 40px; }
  .hero-title { font-size: clamp(30px, 8.6vw, 40px); letter-spacing: 2px; line-height: 1.3; }
  .sec-head { margin-bottom: 40px; }
  .case-slide { flex-basis: 86vw; }
  .case-slide .cs-media { height: 240px; padding: 18px; }
  .show-card:not(.feature) .sc-media { height: 150px; }

  .mobile-callbar {
    display: flex;
    position: fixed;
    left: 0; right: 0; bottom: 0;
    z-index: 90;
    background: #0a0a0a;
    border-top: 1px solid var(--line-2);
  }
  .mobile-callbar a {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 15px 0;
    font-size: 15px;
    font-weight: 600;
    color: var(--heading);
  }
  .mobile-callbar a.primary { background: var(--blue); color: var(--white); }
  .mobile-callbar svg { width: 17px; height: 17px; }
  .float-call { display: none; }
  body { padding-bottom: 52px; }
}

/* ============================================================
   浅色主题（html.light）—— Apple 官网风格
   白底 #fff / 浅灰分区 #f5f5f7 / 正文 #1d1d1f / 辅助 #6e6e73
   苹果蓝 #0071e3 / 胶囊按钮 / 半粗标题 / 收紧字距
   深色 Hero 与媒体展示区保持不变
   ============================================================ */
html.light {
  --panel: #f5f5f7;
  --panel-2: #f5f5f7;
  --line: #e8e8ed;
  --line-2: #d2d2d7;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --faint: #86868b;
  --heading: #1d1d1f;
  --blue: #0071e3;
}
html.light body {
  background: #ffffff;
  color: #1d1d1f;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro SC",
    "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
  font-size: 17px;
  line-height: 1.55;
}
html.light ::selection { background: #0071e3; color: #fff; }

/* ---------- 苹果式排版：半粗标题、收紧字距 ---------- */
html.light .sec-head-left .sec-cn {
  font-size: clamp(30px, 4vw, 48px);
  font-weight: 600;
  letter-spacing: -0.5px;
  color: #1d1d1f;
}
html.light .sec-head-left .sec-en {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 4px;
  color: #6e6e73;
}
html.light .sec-head-left .sec-desc { font-size: 17px; color: #6e6e73; max-width: 700px; }
html.light .sec-more { border-color: #d2d2d7; color: #0071e3; font-size: 20px; }
html.light .sec-more:hover { border-color: #0071e3; color: #0071e3; transform: none; }
html.light .sec-head { margin-bottom: 64px; }

/* ---------- 按钮：胶囊形 ---------- */
html.light .btn {
  border-radius: 980px;
  padding: 12px 30px;
  font-weight: 400;
  font-size: 16px;
  letter-spacing: 0;
}
html.light .btn-primary { background: #0071e3; }
html.light .btn-primary:hover { background: #0077ed; }
html.light .btn-light { background: #0071e3; color: #fff; }
html.light .btn-light:hover { background: #0077ed; }
html.light .btn-dark { background: #1d1d1f; color: #fff; }

/* ---------- 卡片：#f5f5f7 圆角块、无边框 ---------- */
html.light .service-card, html.light .case-tile, html.light .show-card,
html.light .spec-card, html.light .info-card, html.light .industry-item,
html.light .case-slide {
  background: #f5f5f7;
  border: none;
  border-radius: 18px;
}
html.light .service-card:hover, html.light .case-tile:hover,
html.light .show-card:hover, html.light .industry-item:hover,
html.light .case-slide:hover { background: #ececef; transform: none; box-shadow: none; }
html.light .service-card, html.light .industry-item { padding: 44px 36px; }
html.light .service-card h3, html.light .case-tile h3, html.light .show-card .sc-body h3,
html.light .case-slide .cs-body h3, html.light .industry-item h3 {
  font-weight: 600;
  letter-spacing: 0;
  color: #1d1d1f;
  font-size: 21px;
}
html.light .service-card p, html.light .case-tile p, html.light .case-slide .cs-body p,
html.light .industry-item p, html.light .show-card .sc-body p { color: #6e6e73; }
html.light .card-link { color: #0071e3; }
html.light .service-icon { color: #1d1d1f; }
html.light .show-card .sc-badge { color: #0071e3; border-color: rgba(0, 113, 227, 0.4); }

/* ---------- 媒体展示区保持深色（衬托线稿与截图） ---------- */
html.light .show-card .sc-media { background: #101214; border-radius: 18px 18px 0 0; }
html.light .cs-media, html.light .ct-media, html.light .ct-media.contain,
html.light .figure { background: #f5f5f7; }
html.light .case-tile .ct-media { border-bottom: none; }
html.light .figure { border-radius: 18px; }
html.light .figure figcaption { color: #6e6e73; }

/* ---------- 编号与清单 ---------- */
html.light .card-num, html.light .ct-num { color: #86868b; letter-spacing: 2px; }
html.light .check-list li { border-bottom-color: #e8e8ed; color: #1d1d1f; }
html.light .check-list svg { stroke: #0071e3; }
html.light .meta-chips span {
  background: #e8e8ed;
  border: none;
  color: #1d1d1f;
  border-radius: 980px;
}
html.light .brand-chips span { background: #f5f5f7; border: none; color: #1d1d1f; border-radius: 980px; }

/* ---------- 数据与优势 ---------- */
html.light .stat-num { font-weight: 600; letter-spacing: -1px; color: #1d1d1f; }
html.light .stat-num sup { color: #0071e3; }
html.light .stat-label { color: #6e6e73; font-size: 15px; }
html.light .adv-item { border-top: none; background: #f5f5f7; border-radius: 18px; padding: 36px 32px; }
html.light .adv-num { -webkit-text-stroke: 1px #c9ccd2; }
html.light .adv-item h3 { font-weight: 600; letter-spacing: 0; color: #1d1d1f; font-size: 21px; margin-top: 12px; }
html.light .adv-item p { color: #6e6e73; }
html.light .about-intro p { color: #1d1d1f; font-size: 17px; }

/* ---------- 行业与规格 ---------- */
html.light .industry-item { padding: 40px 24px; }
html.light .industry-icon { color: #1d1d1f; }
html.light .spec-card { padding: 32px 36px; }
html.light .spec-card h3 { color: #86868b; letter-spacing: 1px; }
html.light .spec-card ul li { border-bottom-color: #e8e8ed; color: #1d1d1f; }
html.light .spec-card ul li::before { color: #0071e3; }

/* ---------- 分区边框与品牌家族 ---------- */
html.light .section + .section { border-top: none; }
html.light .brand-family { border-bottom: none; padding-bottom: 56px; }
html.light .bf-item { color: #1d1d1f; opacity: 0.85; }
html.light .bf-item:hover { color: #0071e3; opacity: 1; }
html.light .bf-item svg { opacity: 0.6; }
html.light .bf-item:hover svg { opacity: 1; }

/* ---------- 页脚：#f5f5f7 ---------- */
html.light .site-footer { background: #f5f5f7; border-top: none; padding-top: 56px; }
html.light .footer-col h4 { color: #1d1d1f; font-weight: 600; }
html.light .footer-col a, html.light .footer-col p { color: #6e6e73; }
html.light .footer-col a:hover { color: #0071e3; }
html.light .footer-phone { color: #1d1d1f !important; font-weight: 600; }
html.light .footer-bottom { border-top-color: #d2d2d7; color: #86868b; }
html.light .footer-brand p { color: #6e6e73; }

/* ---------- 页头与表单 ---------- */
html.light .page-hero { background: #ffffff; padding: 150px 0 64px; }
html.light .page-hero h1 { font-weight: 600; letter-spacing: -0.5px; color: #1d1d1f; }
html.light .page-hero .page-desc { color: #6e6e73; font-size: 17px; }
html.light .breadcrumb { color: #86868b; }
html.light .prose p { color: #1d1d1f; font-size: 17px; }
html.light .prose h2 { font-weight: 600; letter-spacing: 0; color: #1d1d1f; }

html.light .contact-form, html.light .contact-info { gap: 18px; }
html.light .form-input, html.light .form-textarea {
  background: #ffffff;
  border-color: #d2d2d7;
  border-radius: 12px;
  font-size: 16px;
}
html.light .form-input::placeholder, html.light .form-textarea::placeholder { color: #86868b; }
html.light .form-input:focus, html.light .form-textarea:focus { background: #ffffff; border-color: #0071e3; }
html.light .form-result { background: #f5f5f7; border: none; border-radius: 12px; }
html.light .form-result strong { color: #1d1d1f; }
html.light .info-card { background: #f5f5f7; border: none; border-radius: 18px; }
html.light .info-card .big { color: #1d1d1f; font-weight: 600; }
html.light .info-card p { color: #1d1d1f; }

/* ---------- 悬浮电话与移动端 ---------- */
html.light .float-call { background: #0071e3; box-shadow: 0 8px 24px rgba(0, 113, 227, 0.35); }
html.light .mobile-callbar { background: rgba(255, 255, 255, 0.92); border-top-color: #d2d2d7; backdrop-filter: blur(12px); }
html.light .mobile-callbar a { color: #1d1d1f; }
html.light .mobile-callbar a.primary { background: #0071e3; color: #fff; }

/* ---------- 主题切换按钮 ---------- */
html.light .theme-toggle {
  border-color: #d2d2d7;
  background: transparent;
  color: #1d1d1f;
}
html.light .theme-toggle:hover { border-color: #86868b; }

/* ---------- 下拉菜单（浅色） ---------- */
html.light .dropdown-menu { background: #ffffff; border-color: #d2d2d7; box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12); }
html.light .dropdown-menu a { color: #1d1d1f; }
html.light .dropdown-menu a:hover { background: #f5f5f7; color: #0071e3; }
html.light .dd-num { color: #86868b; }

/* ---------- 移动端菜单（浅色） ---------- */
html.light .mobile-menu { background: #ffffff; }
html.light .mobile-menu > a, html.light .mobile-menu .mm-group > a { color: #1d1d1f; border-bottom-color: #e8e8ed; }
html.light .mobile-menu .mm-sub a { color: #6e6e73; border-bottom-color: #f0f0f2; }
html.light .mobile-menu .active { color: #0071e3; }
html.light .mm-theme-row span { color: #6e6e73; }
html.light .mobile-callbar { background: rgba(255, 255, 255, 0.92); }

/* ---------- 主题切换按钮（基础） ---------- */
.theme-toggle {
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.35);
  background: rgba(255,255,255,0.08);
  color: #ffffff;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: border-color 0.25s, color 0.25s, background 0.25s;
}
.theme-toggle svg { width: 17px; height: 17px; }
.theme-toggle .t-moon { display: none; }
html.light .theme-toggle .t-sun { display: none; }
html.light .theme-toggle .t-moon { display: block; }
.site-header.solid .theme-toggle { border-color: #c9ccd2; background: transparent; color: #333; }

/* ---------- 浅色补充修复：CTA黑底、顶栏白底、页脚Logo ---------- */
html.light .cta-section { background: #000000; }
html.light .cta-section h2 { color: #ffffff; }
html.light .cta-section p { color: #9ba0a6; }
html.light .site-header { background: rgba(255,255,255,0.92); backdrop-filter: blur(12px); }
html.light .nav-link { color: #1d1d1f; }
html.light .nav-link:hover { color: #000000; background: rgba(0,0,0,0.04); }
html.light .nav-link.active { color: #000000; }
html.light .logo-name { color: #1d1d1f; }
html.light .logo-sub { color: #86868b; }
html.light .header-phone { color: #1d1d1f; }
html.light .header-phone svg { stroke: #0071e3; }
html.light .theme-toggle { border-color: #d2d2d7; color: #1d1d1f; background: transparent; }
html.light .theme-toggle:hover { border-color: #86868b; }
html.light .site-footer .logo-name { color: #1d1d1f; }
html.light .site-footer .logo-sub { color: #86868b; }

/* ---------- 案例图双版本（深色=透明线稿 / 浅色=白底原图） ---------- */
.theme-img { display: block; width: 100%; }
.theme-img .ti-light { display: none; }
html.light .theme-img .ti-dark { display: none; }
html.light .theme-img .ti-light { display: block; }

/* ---------- 品牌墙深浅双图切换 ---------- */
.brand-wall-img.wall-light { display: none; }
html.light .brand-wall-img.wall-dark { display: none; }
html.light .brand-wall-img.wall-light { display: block; }

/* ---------- 浅色首屏与 CTA 精修（Apple 风格） ---------- */
html.light .hero { background: linear-gradient(180deg, #fbfcfe 0%, #f5f7fa 100%); }
html.light .hero-bg { display: block; }
html.light .hero-bg.invert { filter: none; opacity: 0.09; }
html.light .hero-bg.bull { filter: invert(1); opacity: 0.1; }
html.light .hero-title, html.light .hero-title-lg { color: #0071e3; text-shadow: none; font-weight: 600; }
html.light .hero-sub { color: #6e6e73; }
html.light .hero-tag { color: #6e6e73; }
html.light .hero-slide::after { background: none; }
html.light .hero-dots button { background: #d2d2d7; }
html.light .hero-dots button.active { background: #1d1d1f; }
html.light .hero-scroll { border-color: #c9ccd2; }
html.light .hero-scroll::after { background: #86868b; }
html.light .hero-arrow { background: rgba(255,255,255,0.75); color: #1d1d1f; border-color: #d2d2d7; }
html.light .hero-actions .btn-outline-light { color: #1d1d1f; border-color: #c9ccd2; background: transparent; }
html.light .hero-actions .btn-outline-light:hover { border-color: #1d1d1f; color: #000; background: transparent; }
html.light .cta-section { background: #f5f5f7; }
html.light .cta-section h2 { color: #1d1d1f; font-weight: 600; letter-spacing: -0.5px; }
html.light .cta-section p { color: #6e6e73; }
html.light .cta-bull { display: none; }
html.light .cta-actions .btn-outline-light { color: #1d1d1f; border-color: #c9ccd2; background: transparent; }
html.light .cta-actions .btn-outline-light:hover { border-color: #1d1d1f; color: #000; background: transparent; }

/* ---------- 浅色顶栏常白底 ---------- */
html.light .site-header { background: rgba(255,255,255,0.92); backdrop-filter: blur(12px); }
html.light .nav-link { color: #1d1d1f; }
html.light .nav-link:hover { color: #000; background: rgba(0,0,0,0.04); }
html.light .nav-link.active { color: #000; }
html.light .logo-name { color: #1d1d1f; }
html.light .logo-sub { color: #86868b; }
html.light .header-phone { color: #1d1d1f; }
html.light .site-footer .logo-name { color: #1d1d1f; }
html.light .site-footer .logo-sub { color: #86868b; }

/* ---------- 首屏背景：去掉放大动画（应用户要求） ---------- */
.hero-bg { animation: none; }

/* ---------- 第三屏团队线稿：缩小居中（不铺满） ---------- */
.hero-bg.team {
  object-fit: contain;
  width: 74%; height: 74%;
  left: 13%; top: 13%;
}
html.light .hero-bg.team { opacity: 0.5; }

}

/* ---------- 第三屏人物缩小 0.8 ---------- */
.hero-bg[src*="首页_背景3"] {
  width: 90%; height: 90%;
  left: 5%; top: 5%;
}

/* ---------- 页脚备案号 ---------- */
.beian {
  margin-top: 14px;
  display: flex;
  gap: 18px;
  justify-content: center;
  flex-wrap: wrap;
}
.beian a {
  color: #7a7d85;
  font-size: 12.5px;
  text-decoration: none;
}
.beian a:hover { color: var(--blue, #3e6ae1); }
html.light .beian a { color: #86868b; }

/* ---------- 浅色模式：汉堡按钮与移动菜单 ---------- */
html.light .nav-toggle span { background: #1d1d1f; }
html.light .mobile-menu { background: #ffffff; }
html.light .mobile-menu > a,
html.light .mobile-menu .mm-group > a { color: #1d1d1f; border-bottom-color: #e8e8ed; }
html.light .mobile-menu .mm-sub a { color: #6e6e73; border-bottom-color: #f0f0f2; }