/* =====================================================
   飞利信 Philisense - 音频产品页面样式（Hero固定高度优化完整版）
   包含：全局重置、导航、Hero、内容卡片、表格、网格、产品展示、响应式等
   ===================================================== */
:root {
  --hero-h-desk: 480px;
  --hero-h-tab: 380px;
  --hero-h-mob: 320px;
  --hero-inner-gap: 44px;
  --hero-padding-x: 24px;
  --hero-img-max-h: 360px;
}
/* ===== 基础重置 ===== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: "Microsoft YaHei", sans-serif;
  background: #f6f8fb;
  color: #111827;
  line-height: 1.5;
}
a {
  text-decoration: none;
  color: inherit;
}
ul {
  list-style: none;
}
/* ===== 顶部公告条 ===== */
.top-notice {
  background: #1e3a8a;
  color: #fff;
  text-align: center;
  padding: 8px;
  font-size: 14px;
}
.top-notice a {
  color: #93c5fd;
  text-decoration: underline;
}
/* ===== 导航栏 ===== */
header {
  background: #fff;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-wrap {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 40px;
}
.logo { font-size: 22px; letter-spacing: 1px; }
.nav-main {
  display: flex;
  gap: 34px;
  align-items: center;
  justify-content: flex-end;
}
.nav-item {
  position: relative;
  cursor: pointer;
  align-items: center;
  font-size: 18px;
  font-weight: 500;
}
.nav-item:hover {
  color: #165dff;
}
.nav-item.has-dropdown .nav-arrow {
  width: 16px;
  height: 16px;
  transition: transform 0.2s ease;
}
.nav-item.has-dropdown:hover .nav-arrow {
  transform: rotate(180deg);
}
.hamburger {
  display: none;
  cursor: pointer;
}
.mobile-menu {
  display: none;
}
/* ===== Hero 区域 ===== */
.intelli-hero {
  background: linear-gradient(128deg, #102033 0%, #165dff 52%, #f3f7ff 100%);
  color: #fff;
  overflow: hidden;
  height: var(--hero-h-desk);
  display: flex;
  align-items: center;
  position: relative;
}
.intelli-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -120px;
  left: 44%;
  width: 70%;
  height: 70%;
  background: rgba(255,255,255,.16);
  border-radius: 999px;
  transform: rotate(-8deg);
  pointer-events: none;
}
.intelli-hero-inner {
  max-width: 1440px;
  width: 100%;
  margin: 0 auto;
  padding: 0 var(--hero-padding-x);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 520px);
  gap: var(--hero-inner-gap);
  align-items: center;
  position: relative;
  z-index: 1;
  max-height: calc(var(--hero-h-desk) - 40px);
  overflow: hidden;
}
.eyebrow {
  display: inline-flex;
  width: fit-content;
  padding: 6px 10px;
  border: 1px solid rgba(255, 255, 255, .26);
  border-radius: 6px;
  color: #dbeafe;
  font-size: 13px;
  margin-bottom: 18px;
}
.intelli-hero h1 {
  font-family: "Space Grotesk", "Microsoft YaHei", sans-serif;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.08;
  letter-spacing: 0;
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}
.intelli-hero p {
  max-width: 760px;
  color: #e5efff;
  font-size: 17px;
  line-height: 1.8;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}
.hero-media {
  border-radius: 8px;
  padding: 12px;
  background: rgba(255, 255, 255, .13);
  border: 1px solid rgba(255, 255, 255, .22);
  box-shadow: 0 24px 70px rgba(15, 23, 42, .24);
  min-height: 300px;
  max-height: var(--hero-img-max-h);
  display: grid;
  place-items: center;
  overflow: hidden;
}
.hero-media img {
  width: 100%;
  max-height: var(--hero-img-max-h);
  object-fit: contain;
  display: block;
  border-radius: 6px;
  background: #fff;
}
.hero-placeholder {
  width: 100%;
  min-height: 300px;
  max-height: var(--hero-img-max-h);
  display: grid;
  place-items: center;
  border-radius: 6px;
  background: rgba(255, 255, 255, .14);
  font-size: 44px;
  font-weight: 700;
}
/* ===== 主内容容器 ===== */
.intelli-main {
  max-width: 1440px;
  margin: 0 auto;
  padding: 54px 24px 82px;
}
/* ===== 卡片面板 ===== */
.intelli-section,
.intelli-panel {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  margin-bottom: 26px;
  box-shadow: 0 10px 28px rgba(15, 23, 42, .05);
}
.intelli-section {
  padding: 30px;
}
.intelli-panel {
  padding: 34px;
}
/* ===== 区块标题 ===== */
.section-heading {
  margin-bottom: 18px;
}
.section-heading span {
  display: block;
  color: #165dff;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 8px;
}
.section-heading h2 {
  font-family: "Space Grotesk", "Microsoft YaHei", sans-serif;
  font-size: 28px;
  line-height: 1.25;
  letter-spacing: 0;
}
/* ===== 富文本 ===== */
.rich-copy {
  color: #374151;
  font-size: 16px;
  line-height: 1.85;
}
.rich-copy p {
  margin-bottom: 13px;
}
.rich-copy ul {
  display: grid;
  gap: 9px;
  margin: 12px 0 4px;
}
.rich-copy li {
  position: relative;
  padding-left: 18px;
}
.rich-copy li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #165dff;
}
/* ===== Meta 卡片（自适应网格） ===== */
.meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}
.meta-card {
  background: #f8fafc;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  padding: 18px;
}
.meta-card h3 {
  font-size: 17px;
  margin-bottom: 10px;
}
.meta-card p {
  color: #4b5563;
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 6px;
}
/* ===== 核心能力网格（固定 3×2） ===== */
.meta-grid-fixed {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(2, auto);
  gap: 16px;
}
.meta-card-centered {
  background: #f8fafc;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  padding: 24px 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 140px;
}
.meta-card-centered h3 {
  font-size: 17px;
  margin-bottom: 10px;
  color: #111827;
}
.meta-card-centered p {
  color: #4b5563;
  font-size: 14px;
  line-height: 1.7;
  margin: 0;
}
/* ===== 表格通用 ===== */
.table-scroll {
  overflow-x: auto;
}
.source-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 1000px;
  table-layout: fixed;
}
.source-table th,
.source-table td {
  border: 1px solid #e5e7eb;
  padding: 16px 14px;
  vertical-align: middle;
  color: #374151;
  line-height: 1.7;
  text-align: center;
}
.source-table th {
  background: #f8fafc;
  font-weight: 600;
  white-space: nowrap;
}
.source-table tr:nth-child(even) td {
  background: #f8fafc;
}
.source-table .col-category { width: 130px; }
.source-table .col-model   { width: 140px; }
.source-table .col-name    { width: 170px; }
.source-table .col-desc    { width: auto; word-break: break-word; }
/* 表格内图片容器 */
.table-img-cell {
  width: 120px;
  min-width: 120px;
  max-width: 120px;
  padding: 8px !important;
}
.table-img-wrap {
  width: 100%;
  height: 90px;
  border-radius: 6px;
  background: #f8fafc;
  border: 1px solid #e5e7eb;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.table-img-wrap img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  display: block;
}
.table-img-wrap-common {
  width: 100%;
  height: 100%;
  min-height: 110px;
  border-radius: 6px;
  background: #f8fafc;
  border: 1px solid #e5e7eb;
  padding: 3px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.table-img-common {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  border-radius: 4px;
}
.table-img-wrap-sm {
  width: 100%;
  aspect-ratio: 16 / 9;
  min-height: 90px;
  margin: 0 auto;
  border-radius: 6px;
  background: #f8fafc;
  border: 1px solid #e5e7eb;
  padding: 3px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
/* ===== 产品展示对齐布局 ===== */
.product-aligned-row {
  display: flex;
  justify-content: center;
  align-items: stretch;
  gap: 24px;
  margin-top: 16px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}
.product-card {
  flex: 1;
  max-width: 280px;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.img-frame {
  width: 100%;
  height: 200px;
  background: #f8fafc;
  border: 1px solid #e5e7eb;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  box-sizing: border-box;
}
.img-frame img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  display: block;
}
.card-label {
  margin-top: 10px;
  font-size: 13px;
  color: #4b5563;
  text-align: center;
  line-height: 1.4;
}
/* ===== 案例图片（居中） ===== */
.case-img-wrap {
  width: 100%;
  margin: 20px 0 0;
  text-align: center;
}
.case-img-wrap img {
  width: 100%;
  max-width: 720px;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  border-radius: 8px;
  background: #f8fafc;
  display: block;
  margin: 0 auto;
}
 
/* ===== 全局响应式 ===== */
@media (max-width: 900px) {
  .intelli-hero {
    height: var(--hero-h-tab);
  }
  .intelli-hero-inner {
    grid-template-columns: 1fr;
    max-height: calc(var(--hero-h-tab) - 30px);
  }
  .hero-media {
    min-height: 220px;
    max-height: 260px;
  }
}
@media (max-width: 1200px) {
  .dropdown-product { width: min(720px, calc(100vw - 48px)); grid-template-columns: 1fr 1fr; }
  .dropdown-solution { width: min(680px, calc(100vw - 48px)); }
}
@media (max-width: 1024px) {
  .nav-wrap { grid-template-columns: auto 1fr; }
  .nav-main { display: none; }
  .hamburger { display: flex; }
  .hero-title { font-size: 36px; }
  .solution-wrap { grid-template-columns: repeat(3, 1fr); }
  .dropdown-product,
  .dropdown-solution,
  .dropdown-company { display: none; }
  .business-grid { flex-direction: column; }
  .business-image { width: 100%; }
  .business-image img { height: auto; object-fit: contain; }
}
@media (max-width: 768px) {
  .hero { height: 60vh; }
  .hero-title { font-size: 28px; }
  .section-title { font-size: 26px; }
  .solution-wrap { grid-template-columns: repeat(2, 1fr); }
  .slide-arrow { display: none; }
  .dropdown-product { width: calc(100vw - 40px); }
  .page-header h1 { font-size: 32px; }
  .section { padding: 24px; }
  .content-text { font-size: 15px; }
  .qualify-table { font-size: 12px; }
  .qualify-table th, .qualify-table td { padding: 10px 8px; }
  .contact-grid { grid-template-columns: 1fr; }
  .branch-grid { grid-template-columns: 1fr; }
  .wechat-qrcode { width: 160px; height: 160px; }
}
@media (max-width: 520px) {
  .intelli-hero {
    height: var(--hero-h-mob);
  }
  .intelli-hero-inner {
    padding: 0 16px;
    max-height: calc(var(--hero-h-mob) - 20px);
  }
  .intelli-main {
    padding: 34px 16px 56px;
  }
  .section-heading h2 {
    font-size: 23px;
  }
  .rich-copy {
    font-size: 15px;
  }
}
@media (max-width: 480px) {
  .solution-wrap { grid-template-columns: 1fr; }
  .card-grid { grid-template-columns: 1fr; }
  .nav-wrap { padding: 0 16px; }
  .section { padding: 60px 16px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
}