/* ============================================
   佛山市小贝智能科技有限公司 官网样式
   ============================================ */
:root {
  --primary: #0a63e6;
  --primary-dark: #0848a8;
  --primary-light: #e8f1ff;
  --cyan: #1fc3ff;
  --dark: #0b1b3f;
  --dark-2: #12264f;
  --text: #2b3a55;
  --text-light: #5b6b84;
  --bg-soft: #f4f8ff;
  --line: #e3ebf7;
  --white: #ffffff;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(11, 27, 63, 0.08);
  --shadow-lg: 0 20px 50px rgba(11, 27, 63, 0.12);
  --grad: linear-gradient(135deg, #0a63e6 0%, #1fc3ff 100%);
  --grad-dark: linear-gradient(135deg, #0b1b3f 0%, #123a7a 100%);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

.container {
  width: min(1180px, 92%);
  margin: 0 auto;
}

/* ---------- 头部导航 ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow 0.3s;
}
.header.scrolled { box-shadow: 0 4px 20px rgba(11, 27, 63, 0.08); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--dark);
}
.logo .logo-mark {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--grad);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 14px rgba(10, 99, 230, 0.35);
}
.logo .logo-name b { color: var(--primary); }

.nav { display: flex; align-items: center; gap: 34px; }
.nav a {
  font-size: 15px;
  color: var(--text);
  font-weight: 500;
  position: relative;
  padding: 6px 0;
  transition: color 0.25s;
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--grad);
  transition: width 0.3s;
}
.nav a:hover, .nav a.active { color: var(--primary); }
.nav a:hover::after, .nav a.active::after { width: 100%; }

.nav-cta {
  background: var(--grad);
  color: #fff !important;
  padding: 9px 22px !important;
  border-radius: 999px;
  font-weight: 600;
  box-shadow: 0 6px 16px rgba(10, 99, 230, 0.3);
  transition: transform 0.25s, box-shadow 0.25s;
}
.nav-cta::after { display: none; }
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 10px 22px rgba(10, 99, 230, 0.4); }

/* 汉堡按钮 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.hamburger span {
  width: 24px;
  height: 2.5px;
  border-radius: 2px;
  background: var(--dark);
  transition: 0.3s;
}
.hamburger.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ---------- 首页 Hero ---------- */
.hero {
  position: relative;
  background: var(--grad-dark);
  overflow: hidden;
  color: #fff;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 15% 20%, rgba(31, 195, 255, 0.18), transparent 40%),
    radial-gradient(circle at 85% 15%, rgba(10, 99, 230, 0.5), transparent 45%),
    radial-gradient(circle at 70% 85%, rgba(31, 195, 255, 0.12), transparent 50%);
}
.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 90px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 90' preserveAspectRatio='none'%3E%3Cpath fill='%23ffffff' d='M0,64 C240,96 480,16 720,32 C960,48 1200,88 1440,56 L1440,90 L0,90 Z'/%3E%3C/svg%3E") no-repeat center / cover;
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 50px;
  padding: 90px 0 130px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(31, 195, 255, 0.14);
  border: 1px solid rgba(31, 195, 255, 0.4);
  color: #8fd9ff;
  font-size: 13.5px;
  font-weight: 500;
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 22px;
  letter-spacing: 0.5px;
}
.hero-badge::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(31, 195, 255, 0.25);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(31, 195, 255, 0.25); }
  50% { box-shadow: 0 0 0 8px rgba(31, 195, 255, 0.05); }
}

.hero h1 {
  font-size: 46px;
  line-height: 1.3;
  font-weight: 800;
  letter-spacing: 1px;
  margin-bottom: 20px;
}
.hero h1 .grad-text {
  background: linear-gradient(90deg, #4dd2ff, #ffffff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p.sub {
  font-size: 16.5px;
  color: rgba(255, 255, 255, 0.78);
  max-width: 520px;
  margin-bottom: 34px;
}

.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 999px;
  font-size: 15.5px;
  font-weight: 600;
  transition: transform 0.25s, box-shadow 0.25s, background 0.25s;
}
.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 10px 26px rgba(31, 195, 255, 0.35);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 14px 34px rgba(31, 195, 255, 0.45); }
.btn-ghost {
  border: 1.5px solid rgba(255, 255, 255, 0.4);
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.14); transform: translateY(-3px); }

.hero-points {
  display: flex;
  gap: 26px;
  margin-top: 40px;
  flex-wrap: wrap;
}
.hero-points li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
}
.hero-points svg { flex-shrink: 0; }

/* Hero 插图 */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}
.hero-visual .card-glow {
  position: absolute;
  width: 90%;
  height: 90%;
  top: 5%;
  background: radial-gradient(circle, rgba(31, 195, 255, 0.28), transparent 70%);
  filter: blur(30px);
  z-index: 0;
}
.hero-visual svg { position: relative; z-index: 1; width: 100%; max-width: 460px; }

.float-chip {
  position: absolute;
  z-index: 2;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 14px;
  padding: 12px 18px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-size: 13px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
  animation: float 4.5s ease-in-out infinite;
}
.float-chip .chip-icon {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--grad);
  display: flex;
  align-items: center;
  justify-content: center;
}
.float-chip b { display: block; font-size: 14px; }
.float-chip span { color: rgba(255, 255, 255, 0.7); font-size: 12px; }
.chip-a { top: 12%; left: -4%; animation-delay: 0s; }
.chip-b { bottom: 16%; right: -2%; animation-delay: 1.6s; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* ---------- 统计条 ---------- */
.stats {
  position: relative;
  z-index: 3;
  margin-top: -70px;
  padding-bottom: 70px;
}
.stats-grid {
  background: #fff;
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  overflow: hidden;
}
.stat-item {
  padding: 34px 20px;
  text-align: center;
  position: relative;
}
.stat-item:not(:last-child)::after {
  content: "";
  position: absolute;
  right: 0;
  top: 25%;
  height: 50%;
  width: 1px;
  background: var(--line);
}
.stat-item .num {
  font-size: 34px;
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-family: "DIN Alternate", "Bebas Neue", Arial, sans-serif;
}
.stat-item .label { font-size: 14px; color: var(--text-light); margin-top: 6px; }

/* ---------- 通用章节 ---------- */
.section { padding: 90px 0; }
.section.soft { background: var(--bg-soft); }

.section-head {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 56px;
}
.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-light);
  border-radius: 999px;
  padding: 5px 16px;
  letter-spacing: 2px;
  margin-bottom: 14px;
}
.section-head h2 {
  font-size: 34px;
  font-weight: 800;
  color: var(--dark);
  margin-bottom: 14px;
  letter-spacing: 0.5px;
}
.section-head h2 em {
  font-style: normal;
  color: var(--primary);
}
.section-head p { color: var(--text-light); font-size: 15.5px; }

/* ---------- 卡片网格 ---------- */
.cards-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.cards-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.cards-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
}

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 28px;
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(10, 99, 230, 0.25);
}
.card .icon-box {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}
.card:hover .icon-box {
  background: var(--grad);
}
.card:hover .icon-box svg path,
.card:hover .icon-box svg circle,
.card:hover .icon-box svg rect {
  stroke: #fff;
}
.card h3 {
  font-size: 18px;
  color: var(--dark);
  margin-bottom: 10px;
  font-weight: 700;
}
.card p {
  font-size: 14.5px;
  color: var(--text-light);
  line-height: 1.8;
}

/* ---------- 优势列表 ---------- */
.feature-item { text-align: left; }
.feature-item .icon-box { margin-bottom: 16px; }

/* ---------- 公司简介 ---------- */
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.intro-text h2 {
  font-size: 30px;
  font-weight: 800;
  color: var(--dark);
  margin-bottom: 18px;
}
.intro-text h2 em { font-style: normal; color: var(--primary); }
.intro-text p {
  color: var(--text-light);
  font-size: 15px;
  margin-bottom: 14px;
  line-height: 1.9;
}
.intro-list {
  margin-top: 22px;
  display: grid;
  gap: 12px;
}
.intro-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14.5px;
  color: var(--text);
}
.intro-list li svg { flex-shrink: 0; margin-top: 4px; }

.intro-visual {
  position: relative;
}
.intro-visual .img-frame {
  border-radius: 20px;
  overflow: hidden;
  background: var(--grad-dark);
  min-height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  position: relative;
}
.intro-visual .img-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 30% 20%, rgba(31, 195, 255, 0.25), transparent 45%),
    radial-gradient(circle at 80% 90%, rgba(10, 99, 230, 0.4), transparent 50%);
}
.intro-visual .img-frame svg { position: relative; z-index: 1; width: 80%; }

.intro-tag {
  position: absolute;
  bottom: -20px;
  right: -12px;
  background: #fff;
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
  padding: 16px 22px;
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 2;
}
.intro-tag .num {
  font-size: 26px;
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.intro-tag span { font-size: 13px; color: var(--text-light); line-height: 1.4; }

/* ---------- 流程 ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}
.step {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 24px;
  transition: transform 0.3s, box-shadow 0.3s;
}
.step:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.step .step-num {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--grad);
  color: #fff;
  font-weight: 800;
  font-size: 19px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  box-shadow: 0 8px 18px rgba(10, 99, 230, 0.3);
}
.step h3 { font-size: 17px; color: var(--dark); margin-bottom: 8px; }
.step p { font-size: 14px; color: var(--text-light); line-height: 1.8; }

/* ---------- CTA 横幅 ---------- */
.cta-banner {
  position: relative;
  border-radius: 24px;
  background: var(--grad-dark);
  overflow: hidden;
  padding: 60px 50px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
  color: #fff;
}
.cta-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 10% 20%, rgba(31, 195, 255, 0.25), transparent 45%),
    radial-gradient(circle at 90% 90%, rgba(31, 195, 255, 0.15), transparent 40%);
}
.cta-banner > * { position: relative; z-index: 1; }
.cta-banner h3 { font-size: 28px; font-weight: 800; margin-bottom: 10px; }
.cta-banner p { color: rgba(255, 255, 255, 0.8); font-size: 15px; }
.cta-banner .btn-primary { box-shadow: 0 12px 30px rgba(31, 195, 255, 0.4); }
.cta-phone {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: 1px;
  color: #fff;
  background: linear-gradient(90deg, #4dd2ff, #fff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------- 关于页 ---------- */
.page-hero {
  position: relative;
  background: var(--grad-dark);
  color: #fff;
  padding: 76px 0 100px;
  overflow: hidden;
  text-align: center;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(31, 195, 255, 0.2), transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(10, 99, 230, 0.45), transparent 45%);
}
.page-hero::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 80px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 90' preserveAspectRatio='none'%3E%3Cpath fill='%23ffffff' d='M0,64 C240,96 480,16 720,32 C960,48 1200,88 1440,56 L1440,90 L0,90 Z'/%3E%3C/svg%3E") no-repeat center / cover;
}
.page-hero > .container { position: relative; z-index: 2; }
.page-hero h1 { font-size: 38px; font-weight: 800; margin-bottom: 14px; letter-spacing: 1px; }
.page-hero .crumb { color: rgba(255, 255, 255, 0.7); font-size: 14.5px; }
.page-hero .crumb a:hover { color: #4dd2ff; }
.page-hero .crumb b { color: #4dd2ff; font-weight: 500; }

/* 经营范围列表 */
.scope-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.scope-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px 22px;
  transition: transform 0.3s, box-shadow 0.3s;
}
.scope-item:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.scope-item svg { flex-shrink: 0; margin-top: 3px; }
.scope-item h4 { font-size: 15.5px; color: var(--dark); margin-bottom: 4px; }
.scope-item p { font-size: 13.5px; color: var(--text-light); }

/* 公司信息表格 */
.info-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
}
.info-table tr { border-bottom: 1px solid var(--line); }
.info-table tr:last-child { border-bottom: none; }
.info-table th {
  width: 200px;
  background: var(--bg-soft);
  color: var(--dark);
  font-weight: 600;
  text-align: left;
  padding: 18px 24px;
  font-size: 14.5px;
  white-space: nowrap;
}
.info-table td {
  padding: 18px 24px;
  font-size: 14.5px;
  color: var(--text);
  line-height: 1.9;
}

/* ---------- 联系页 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 40px;
  align-items: stretch;
}
.contact-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px;
  box-shadow: var(--shadow);
}
.contact-card h3 { font-size: 20px; color: var(--dark); margin-bottom: 22px; }
.contact-row {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px dashed var(--line);
}
.contact-row:last-child { border-bottom: none; }
.contact-row .c-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: 12px;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
}
.contact-row h4 { font-size: 14px; color: var(--text-light); font-weight: 500; margin-bottom: 2px; }
.contact-row p { font-size: 15.5px; color: var(--dark); font-weight: 600; }

/* 地图占位 */
.map-box {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--grad-dark);
  min-height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.85);
  padding: 40px;
  position: relative;
  box-shadow: var(--shadow-lg);
}
.map-box::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 30% 25%, rgba(31, 195, 255, 0.2), transparent 45%),
    radial-gradient(circle at 75% 80%, rgba(10, 99, 230, 0.35), transparent 50%);
}
.map-box > * { position: relative; z-index: 1; }
.map-box .pin {
  width: 74px;
  height: 74px;
  border-radius: 50%;
  background: var(--grad);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 12px rgba(31, 195, 255, 0.15), 0 16px 34px rgba(0, 0, 0, 0.3);
  margin-bottom: 26px;
  animation: float 3.5s ease-in-out infinite;
}
.map-box h3 { font-size: 21px; margin-bottom: 8px; }
.map-box p { font-size: 14.5px; line-height: 1.9; text-align: center; opacity: 0.85; }

/* ---------- 页脚 ---------- */
.footer {
  background: var(--dark);
  color: rgba(255, 255, 255, 0.72);
  padding: 60px 0 0;
  margin-top: 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 46px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.footer h4 {
  color: #fff;
  font-size: 16px;
  margin-bottom: 18px;
  font-weight: 700;
}
.footer .f-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 19px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}
.footer .f-logo .logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background: var(--grad);
  display: flex;
  align-items: center;
  justify-content: center;
}
.footer .f-desc { font-size: 14px; line-height: 1.9; }
.footer ul li { margin-bottom: 11px; font-size: 14px; }
.footer ul a { transition: color 0.25s; }
.footer ul a:hover { color: #4dd2ff; }
.footer .f-contact li { display: flex; align-items: flex-start; gap: 10px; }
.footer .f-contact svg { flex-shrink: 0; margin-top: 4px; }

.footer-bottom {
  padding: 22px 0;
  text-align: center;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.5);
}
.footer-bottom .beian a {
  color: rgba(255, 255, 255, 0.5);
  transition: color 0.25s;
}
.footer-bottom .beian a:hover { color: #4dd2ff; }
.footer-bottom .beian { margin-top: 8px; }

/* ---------- 返回顶部 ---------- */
.to-top {
  position: fixed;
  right: 26px;
  bottom: 30px;
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--grad);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 26px rgba(10, 99, 230, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: all 0.35s;
  z-index: 90;
}
.to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { transform: translateY(-4px); }

/* ---------- 动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.d1 { transition-delay: 0.08s; }
.d2 { transition-delay: 0.16s; }
.d3 { transition-delay: 0.24s; }
.d4 { transition-delay: 0.32s; }
.d5 { transition-delay: 0.4s; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero h1 { font-size: 38px; }
  .hero-inner { grid-template-columns: 1fr; padding: 64px 0 120px; }
  .hero-visual { order: -1; max-width: 420px; margin: 0 auto; }
  .cards-4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .scope-list { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .intro-grid { grid-template-columns: 1fr; gap: 46px; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 12px 6%;
  padding-bottom: 20px;
    box-shadow: 0 20px 40px rgba(11, 27, 63, 0.12);
    transform: translateY(-130%);
    transition: transform 0.35s;
    z-index: 99;
  }
  .nav.open { transform: translateY(0); }
  .nav a { width: 100%; padding: 13px 0; border-bottom: 1px solid var(--line); }
  .nav a::after { display: none; }
  .nav .nav-cta { margin-top: 16px; width: auto; text-align: center; }
  .hamburger { display: flex; }

  .hero h1 { font-size: 30px; }
  .hero p.sub { font-size: 15px; }
  .hero-actions .btn { padding: 12px 22px; font-size: 14.5px; }
  .hero-inner { padding: 50px 0 110px; }
  .chip-a { left: -6px; }
  .chip-b { right: -6px; }

  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2)::after { display: none; }
  .stat-item:nth-child(2), .stat-item:nth-child(4) { border-bottom: none; }

  .section { padding: 64px 0; }
  .section-head h2 { font-size: 27px; }
  .cards-3, .cards-2 { grid-template-columns: 1fr; }
  .cards-4 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .scope-list { grid-template-columns: 1fr; }
  .intro-text h2 { font-size: 25px; }
  .intro-tag { right: 4px; }
  .cta-banner { padding: 40px 28px; text-align: center; justify-content: center; }
  .cta-phone { font-size: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 34px; }
  .info-table th { width: 110px; padding: 14px 16px; }
  .info-table td { padding: 14px 16px; }
  .contact-card { padding: 26px; }
  .page-hero { padding: 56px 0 90px; }
  .page-hero h1 { font-size: 29px; }
}