/* ==========================================================================
   南昌地铁广告网 · 全站样式
   设计语言：科技蓝 + 地铁红 / 简洁大气 / 移动端优先
   ========================================================================== */

:root {
  /* 品牌色 */
  --blue: #0B4EA2;
  --blue-deep: #08356F;
  --blue-light: #1E6FD9;
  --blue-soft: #E8F1FC;
  --red: #E60012;
  --red-deep: #B0000E;
  --red-soft: #FDEBEC;
  /* 中性色 */
  --ink: #1A2332;
  --gray: #5B6B7F;
  --gray-light: #8A97A8;
  --bg: #F5F7FA;
  --bg-white: #FFFFFF;
  --line: #E3E8EF;
  /* 圆角与阴影 */
  --radius: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 8px rgba(11, 78, 162, 0.08);
  --shadow-md: 0 8px 24px rgba(11, 78, 162, 0.12);
  --shadow-lg: 0 16px 48px rgba(8, 53, 111, 0.18);
  /* 字体 */
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --container: 1200px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--blue); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--red); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 20px; }

/* ---------- 通用组件 ---------- */
.section { padding: 72px 0; }
.section-alt { background: var(--bg-white); }
.section-blue { background: linear-gradient(160deg, var(--blue-deep), var(--blue) 60%, var(--blue-light)); color: #fff; }

.section-head { text-align: center; max-width: 760px; margin: 0 auto 48px; }
.section-head .tag {
  display: inline-block; padding: 4px 14px; border-radius: 999px;
  background: var(--blue-soft); color: var(--blue);
  font-size: 13px; font-weight: 600; letter-spacing: 1px; margin-bottom: 14px;
}
.section-blue .section-head .tag { background: rgba(255,255,255,.14); color: #fff; }
.section-head h2 { font-size: clamp(26px, 3.4vw, 36px); font-weight: 800; letter-spacing: .5px; }
.section-head h2 em { font-style: normal; color: var(--red); }
.section-blue .section-head h2 em { color: #FFB3BA; }
.section-head p { margin-top: 12px; color: var(--gray); font-size: 15px; }
.section-blue .section-head p { color: rgba(255,255,255,.82); }

.sec-title { font-size: clamp(22px, 2.6vw, 30px); font-weight: 800; margin-bottom: 16px; }
.sec-sub { color: var(--gray); font-size: 15px; max-width: 640px; }

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 26px; border-radius: 999px;
  font-size: 15px; font-weight: 600; letter-spacing: .5px;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--red); color: #fff; box-shadow: 0 6px 18px rgba(230,0,18,.32); }
.btn-primary:hover { background: var(--red-deep); color: #fff; }
.btn-outline { border: 1.5px solid rgba(255,255,255,.75); color: #fff; }
.btn-outline:hover { background: rgba(255,255,255,.12); color: #fff; }
.btn-ghost { border: 1.5px solid var(--blue); color: var(--blue); background: #fff; }
.btn-ghost:hover { background: var(--blue-soft); color: var(--blue-deep); }

/* 面包屑 */
.breadcrumb { padding: 14px 0; font-size: 13.5px; color: var(--gray-light); }
.breadcrumb a { color: var(--gray-light); }
.breadcrumb a:hover { color: var(--red); }
.breadcrumb .sep { margin: 0 8px; color: #C6CFDB; }

/* 页面头部横幅 */
.page-hero {
  background: linear-gradient(135deg, var(--blue-deep) 0%, var(--blue) 55%, var(--blue-light) 100%);
  color: #fff; padding: 64px 0 60px; position: relative; overflow: hidden;
}
.page-hero::after {
  content: ""; position: absolute; right: -80px; top: -80px; width: 340px; height: 340px;
  border-radius: 50%; background: radial-gradient(circle, rgba(255,255,255,.14), transparent 70%);
}
.page-hero::before {
  content: ""; position: absolute; left: -60px; bottom: -120px; width: 260px; height: 260px;
  border-radius: 50%; background: radial-gradient(circle, rgba(230,0,18,.28), transparent 70%);
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 { font-size: clamp(26px, 3.6vw, 40px); font-weight: 800; letter-spacing: 1px; }
.page-hero p { margin-top: 14px; max-width: 720px; color: rgba(255,255,255,.85); font-size: 15.5px; }

/* 卡片 */
.card {
  background: #fff; border-radius: var(--radius);
  box-shadow: var(--shadow-sm); border: 1px solid var(--line);
  transition: transform .25s ease, box-shadow .25s ease;
  overflow: hidden;
}
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }

/* 标签 */
.pill {
  display: inline-block; padding: 3px 12px; border-radius: 999px;
  font-size: 12.5px; font-weight: 600;
}
.pill-red { background: var(--red-soft); color: var(--red); }
.pill-blue { background: var(--blue-soft); color: var(--blue); }
.pill-gray { background: #EEF1F5; color: var(--gray); }

/* 网格 */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

/* ---------- 顶部信息条 ---------- */
.topbar { background: var(--blue-deep); color: rgba(255,255,255,.85); font-size: 13px; }
.topbar .container { display: flex; justify-content: space-between; align-items: center; min-height: 38px; }
.topbar a { color: rgba(255,255,255,.85); }
.topbar a:hover { color: #fff; }
.topbar .tb-right span { margin-left: 18px; }
.topbar .tb-right i { font-style: normal; margin-right: 5px; color: #FFB3BA; }

/* ---------- 导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.96); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: flex; align-items: center; gap: 12px; }
.logo-mark {
  width: 42px; height: 42px; border-radius: 12px; flex-shrink: 0;
  background: linear-gradient(135deg, var(--blue), var(--blue-light));
  display: grid; place-items: center; color: #fff; font-weight: 900; font-size: 20px;
  box-shadow: 0 4px 12px rgba(11,78,162,.35); position: relative;
}
.logo-mark::after {
  content: ""; position: absolute; right: -5px; top: -5px; width: 14px; height: 14px;
  background: var(--red); border-radius: 50%; border: 2px solid #fff;
}
.logo-text { line-height: 1.25; }
.logo-text strong { display: block; font-size: 18px; font-weight: 800; color: var(--blue-deep); letter-spacing: 1px; }
.logo-text small { font-size: 11.5px; color: var(--gray-light); letter-spacing: 2px; }

.nav-menu { display: flex; align-items: center; gap: 4px; }
.nav-menu > li > a {
  display: block; padding: 10px 15px; border-radius: 10px;
  color: var(--ink); font-size: 15px; font-weight: 600; position: relative;
}
.nav-menu > li > a:hover, .nav-menu > li > a.active { color: var(--red); background: var(--red-soft); }
.nav-menu > li.has-sub { position: relative; }
.nav-menu > li.has-sub > a::after {
  content: ""; display: inline-block; width: 6px; height: 6px; margin-left: 7px;
  border-right: 2px solid currentColor; border-bottom: 2px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
}
.submenu {
  position: absolute; top: calc(100% + 6px); left: 0; min-width: 230px;
  background: #fff; border-radius: 12px; box-shadow: var(--shadow-md);
  border: 1px solid var(--line); padding: 8px; opacity: 0; visibility: hidden;
  transform: translateY(8px); transition: all .22s ease; z-index: 50;
}
.nav-menu > li.has-sub:hover .submenu { opacity: 1; visibility: visible; transform: translateY(0); }
.submenu a {
  display: flex; align-items: center; justify-content: space-between;
  padding: 9px 12px; border-radius: 8px; font-size: 14px; color: var(--ink); font-weight: 500;
}
.submenu a:hover { background: var(--blue-soft); color: var(--blue-deep); }
.submenu a .icon { font-style: normal; color: var(--red); font-weight: 700; }

.nav-cta { display: flex; align-items: center; gap: 14px; }
.nav-tel { display: flex; align-items: center; gap: 8px; font-weight: 700; color: var(--blue-deep); font-size: 15px; }
.nav-tel i { font-style: normal; color: var(--red); font-weight: 900; }
.nav-cta .btn { padding: 10px 22px; font-size: 14px; }

/* 汉堡按钮 */
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.nav-toggle span { width: 24px; height: 2.5px; background: var(--blue-deep); border-radius: 2px; transition: all .25s ease; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, var(--blue-deep) 0%, var(--blue) 52%, var(--blue-light) 100%);
  color: #fff; position: relative; overflow: hidden;
}
.hero .container { position: relative; z-index: 2; padding-top: 72px; padding-bottom: 84px; }
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: center; }

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.22);
  padding: 7px 16px; border-radius: 999px; font-size: 13px; letter-spacing: .5px;
}
.hero-badge .dot { width: 8px; height: 8px; border-radius: 50%; background: #2EE6A8; box-shadow: 0 0 0 4px rgba(46,230,168,.25); }
.hero h1 { font-size: clamp(30px, 4.4vw, 46px); line-height: 1.28; font-weight: 800; margin: 22px 0 18px; letter-spacing: 1px; }
.hero h1 em { font-style: normal; color: #FFB3BA; }
.hero .lead { font-size: 16.5px; color: rgba(255,255,255,.88); max-width: 560px; }
.hero-actions { display: flex; gap: 16px; margin-top: 32px; flex-wrap: wrap; }

.hero-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 44px; max-width: 560px; }
.hero-stats .stat { border-left: 2px solid rgba(255,255,255,.35); padding-left: 14px; }
.hero-stats .stat b { display: block; font-size: 26px; font-weight: 800; color: #fff; line-height: 1.2; }
.hero-stats .stat b i { font-style: normal; color: #FFD34D; }
.hero-stats .stat span { font-size: 12.5px; color: rgba(255,255,255,.78); }

/* Hero 右侧地铁示意图 */
.hero-visual { position: relative; }
.metro-map-card {
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.18);
  border-radius: 20px; padding: 22px; backdrop-filter: blur(6px);
}
.metro-map-card .map-title { display: flex; justify-content: space-between; align-items: center; font-size: 13.5px; color: rgba(255,255,255,.85); margin-bottom: 14px; }
.metro-map-card .map-title b { font-size: 15px; color: #fff; }
.metro-map-card svg { width: 100%; height: auto; display: block; }

.hero-float {
  position: absolute; background: #fff; color: var(--ink);
  border-radius: 14px; box-shadow: var(--shadow-lg); padding: 12px 16px;
  display: flex; align-items: center; gap: 10px; font-size: 13px; animation: floaty 5s ease-in-out infinite;
}
.hero-float .ic { width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; font-weight: 800; font-size: 16px; color: #fff; }
.hero-float.f1 { top: -18px; right: 6px; animation-delay: .4s; }
.hero-float.f1 .ic { background: linear-gradient(135deg, var(--red), #FF4D5E); }
.hero-float.f2 { bottom: -16px; left: -12px; animation-delay: 1.2s; }
.hero-float.f2 .ic { background: linear-gradient(135deg, var(--blue-light), var(--blue)); }
.hero-float b { display: block; font-size: 14.5px; }

@keyframes floaty { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-9px); } }

/* ---------- 产品入口卡片 ---------- */
.resource-card { padding: 30px 26px; display: block; color: var(--ink); }
.resource-card .rc-photo { width: 100%; height: 180px; object-fit: cover; border-radius: 10px; margin-bottom: 18px; display: block; box-shadow: var(--shadow-sm); }
.resource-card .rc-icon {
  width: 56px; height: 56px; border-radius: 16px; display: grid; place-items: center;
  font-size: 26px; margin-bottom: 18px; color: #fff;
}
.rc-1 .rc-icon { background: linear-gradient(135deg, #0B4EA2, #1E6FD9); }
.rc-2 .rc-icon { background: linear-gradient(135deg, #E60012, #FF4D5E); }
.rc-3 .rc-icon { background: linear-gradient(135deg, #7A2BF1, #A05CFF); }
.rc-4 .rc-icon { background: linear-gradient(135deg, #0E9F8C, #2ED8C2); }
.resource-card h3 { font-size: 19px; font-weight: 700; margin-bottom: 8px; }
.resource-card p { font-size: 13.5px; color: var(--gray); margin-bottom: 14px; }
.resource-card .more { font-size: 13.5px; font-weight: 600; color: var(--blue); display: inline-flex; align-items: center; gap: 5px; }
.resource-card .more::after { content: "→"; transition: transform .2s ease; }
.resource-card:hover .more::after { transform: translateX(4px); }

/* ---------- 数据看板 ---------- */
.stat-board { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.stat-item {
  text-align: center; padding: 34px 18px; border-radius: var(--radius);
  background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.14);
}
.stat-item b { display: block; font-size: clamp(30px, 3.4vw, 42px); font-weight: 800; color: #fff; line-height: 1.15; }
.stat-item b i { font-style: normal; color: #FFD34D; font-size: .55em; margin-left: 2px; }
.stat-item span { display: block; margin-top: 10px; font-size: 14px; color: rgba(255,255,255,.8); letter-spacing: 1px; }

/* ---------- 案例 ---------- */
.case-card .case-cover {
  height: 200px; display: grid; place-items: center; color: #fff; position: relative;
  font-size: 34px; font-weight: 800; letter-spacing: 4px; overflow: hidden;
}
.case-cover::before { content: ""; position: absolute; inset: 0; background: linear-gradient(160deg, rgba(8,53,111,.55), rgba(11,78,162,.75)); }
.case-cover span { position: relative; z-index: 1; text-shadow: 0 4px 16px rgba(0,0,0,.3); }
.case-body { padding: 22px 24px 26px; }
.case-body .case-tags { display: flex; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; }
.case-body h3 { font-size: 17.5px; font-weight: 700; margin-bottom: 8px; }
.case-body p { font-size: 13.5px; color: var(--gray); }
.case-body .case-meta { margin-top: 14px; padding-top: 14px; border-top: 1px dashed var(--line); font-size: 12.5px; color: var(--gray-light); display: flex; gap: 14px; flex-wrap: wrap; }
.case-body .case-meta b { color: var(--blue); font-weight: 600; }

/* ---------- 洞察 / 新闻列表 ---------- */
.post-card .post-cover {
  height: 150px; display: grid; place-items: center; font-size: 26px;
  background: linear-gradient(135deg, var(--blue-soft), #D9E9FB); color: var(--blue);
}
.post-body { padding: 20px 22px 24px; }
.post-body .date { font-size: 12.5px; color: var(--gray-light); margin-bottom: 8px; display: block; }
.post-body h3 { font-size: 16.5px; font-weight: 700; line-height: 1.5; margin-bottom: 8px; }
.post-body h3 a { color: var(--ink); }
.post-body h3 a:hover { color: var(--red); }
.post-body p { font-size: 13.5px; color: var(--gray); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ---------- 服务流程 / 时间线 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; counter-reset: step; }
.step { position: relative; background: #fff; border-radius: var(--radius); border: 1px solid var(--line); padding: 28px 22px; box-shadow: var(--shadow-sm); }
.step::before {
  counter-increment: step; content: "0" counter(step);
  position: absolute; top: 16px; right: 18px; font-size: 40px; font-weight: 800;
  color: var(--blue-soft); line-height: 1;
}
.step .st-icon { width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; font-size: 22px; color: #fff; margin-bottom: 14px; }
.step h3 { font-size: 16.5px; font-weight: 700; margin-bottom: 6px; }
.step p { font-size: 13.5px; color: var(--gray); }

/* ---------- FAQ 手风琴 ---------- */
.faq-list { max-width: 860px; margin: 0 auto; }
.faq-item { background: #fff; border: 1px solid var(--line); border-radius: 12px; margin-bottom: 14px; overflow: hidden; }
.faq-item .faq-q {
  width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 16px;
  padding: 18px 22px; font-size: 16px; font-weight: 600; color: var(--ink); text-align: left;
}
.faq-item .faq-q .q-mark { color: var(--red); font-weight: 800; margin-right: 10px; }
.faq-item .faq-q .faq-arrow { flex-shrink: 0; width: 26px; height: 26px; border-radius: 50%; background: var(--blue-soft); color: var(--blue); display: grid; place-items: center; font-size: 14px; transition: transform .25s ease; }
.faq-item.open .faq-arrow { transform: rotate(180deg); background: var(--red); color: #fff; }
.faq-item .faq-a { max-height: 0; overflow: hidden; transition: max-height .3s ease; }
.faq-item.open .faq-a { max-height: 600px; }
.faq-item .faq-a-inner { padding: 0 22px 20px; color: var(--gray); font-size: 14.5px; border-top: 1px dashed var(--line); padding-top: 14px; margin: 0 22px 18px; padding-left: 0; padding-right: 0; }

/* ---------- 表格 ---------- */
.table-wrap { overflow-x: auto; background: #fff; border-radius: var(--radius); border: 1px solid var(--line); box-shadow: var(--shadow-sm); }
table.data-table { width: 100%; border-collapse: collapse; min-width: 720px; font-size: 14px; }
.data-table th { background: var(--blue-deep); color: #fff; font-weight: 600; text-align: left; padding: 13px 18px; white-space: nowrap; }
.data-table td { padding: 13px 18px; border-bottom: 1px solid var(--line); color: var(--ink); }
.data-table tr:last-child td { border-bottom: none; }
.data-table tbody tr:hover td { background: var(--blue-soft); }
.data-table .num { font-weight: 700; color: var(--blue); }

/* ---------- 报价 CTA ---------- */
.cta-banner {
  background: linear-gradient(120deg, var(--red) 0%, #FF2D3F 60%, var(--red-deep) 100%);
  border-radius: 20px; padding: 46px 40px; color: #fff; position: relative; overflow: hidden;
}
.cta-banner::after { content: ""; position: absolute; right: -60px; top: -60px; width: 220px; height: 220px; border-radius: 50%; background: rgba(255,255,255,.12); }
.cta-banner .cb-inner { display: flex; justify-content: space-between; align-items: center; gap: 28px; flex-wrap: wrap; position: relative; z-index: 1; }
.cta-banner h3 { font-size: clamp(20px, 2.6vw, 28px); font-weight: 800; }
.cta-banner p { margin-top: 8px; opacity: .92; font-size: 14.5px; }
.cta-banner .btn-white { background: #fff; color: var(--red); box-shadow: 0 8px 24px rgba(0,0,0,.18); }
.cta-banner .btn-white:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(0,0,0,.25); }

/* ---------- 列表页 ---------- */
.layout { display: grid; grid-template-columns: 1fr 320px; gap: 40px; align-items: start; }
.sidebar { position: sticky; top: 96px; }
.side-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow-sm); margin-bottom: 20px; }
.side-card h4 { font-size: 16px; font-weight: 700; margin-bottom: 14px; padding-bottom: 12px; border-bottom: 2px solid var(--red); display: inline-block; }
.side-card ul li { padding: 8px 0; border-bottom: 1px dashed var(--line); font-size: 14px; }
.side-card ul li:last-child { border-bottom: none; }
.side-card ul li a { color: var(--ink); }
.side-card ul li a:hover { color: var(--red); }
.side-cta { background: linear-gradient(150deg, var(--blue-deep), var(--blue)); color: #fff; }
.side-cta h4 { border-bottom-color: var(--red); color: #fff; }
.side-cta p { font-size: 13.5px; opacity: .88; margin-bottom: 16px; }
.side-cta .btn { width: 100%; justify-content: center; }

/* ---------- 详情页正文 ---------- */
.article { background: #fff; border-radius: var(--radius); border: 1px solid var(--line); box-shadow: var(--shadow-sm); padding: 40px; }
.article h2 { font-size: 24px; font-weight: 800; margin: 34px 0 14px; padding-left: 14px; border-left: 5px solid var(--red); }
.article h3 { font-size: 19px; font-weight: 700; margin: 26px 0 12px; }
.article p { margin-bottom: 16px; font-size: 15px; color: #3A4657; }
.article ul, .article ol { margin: 0 0 18px 22px; }
.article ul li { list-style: disc; margin-bottom: 8px; font-size: 15px; color: #3A4657; }
.article ol li { list-style: decimal; margin-bottom: 8px; font-size: 15px; color: #3A4657; }
.article .highlight { background: var(--blue-soft); border-radius: 10px; padding: 16px 20px; margin: 20px 0; font-size: 14.5px; }
.article .highlight b { color: var(--blue-deep); }
.article blockquote { border-left: 4px solid var(--red); background: var(--red-soft); padding: 14px 18px; margin: 18px 0; border-radius: 0 10px 10px 0; font-size: 14.5px; color: #7A1F28; }
.article .kv { display: grid; grid-template-columns: 130px 1fr; row-gap: 10px; font-size: 14.5px; margin-bottom: 18px; }
.article .kv dt { color: var(--gray-light); font-weight: 600; }
.article .kv dd { color: var(--ink); }
.article img.ph { border-radius: 12px; margin: 18px 0; }
.article img.case-photo { width: 100%; height: auto; max-height: 480px; object-fit: cover; border-radius: 12px; margin: 18px 0 6px; box-shadow: var(--shadow-sm); border: 1px solid var(--line); }
.article figcaption { font-size: 12.5px; color: var(--gray-light); text-align: center; margin-bottom: 24px; line-height: 1.6; }
.article .case-meta-line { display: flex; flex-wrap: wrap; gap: 8px 22px; margin: 4px 0 6px; font-size: 14px; color: var(--gray); }
.article .case-meta-line b { color: var(--blue-deep); font-weight: 600; }
.article .ph-box { border-radius: 12px; background: linear-gradient(135deg, var(--blue-soft), #EAF4FE); display: grid; place-items: center; min-height: 160px; color: var(--blue); font-weight: 700; letter-spacing: 2px; margin: 18px 0; border: 1.5px dashed #B9D4F2; }

/* ---------- 关于我们 ---------- */
.about-feature { display: flex; gap: 22px; align-items: flex-start; }
.about-feature .af-icon { width: 54px; height: 54px; border-radius: 14px; flex-shrink: 0; display: grid; place-items: center; font-size: 24px; color: #fff; }
.about-feature h3 { font-size: 17px; font-weight: 700; margin-bottom: 6px; }
.about-feature p { font-size: 14px; color: var(--gray); }
.qualify-item { text-align: center; padding: 30px 16px; }
.qualify-item .q-badge { width: 64px; height: 64px; margin: 0 auto 14px; border-radius: 50%; display: grid; place-items: center; font-size: 26px; color: #fff; }
.qualify-item h3 { font-size: 15.5px; font-weight: 700; margin-bottom: 6px; }
.qualify-item p { font-size: 12.5px; color: var(--gray-light); }

/* ---------- 页脚 ---------- */
.site-footer { background: #0E1B2E; color: #9FB0C3; font-size: 14px; }
.footer-main { padding: 56px 0 40px; display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.3fr; gap: 40px; }
.footer-main h4 { color: #fff; font-size: 15.5px; font-weight: 700; margin-bottom: 18px; }
.footer-main ul li { margin-bottom: 10px; }
.footer-main ul li a { color: #9FB0C3; }
.footer-main ul li a:hover { color: #fff; }
.footer-about .logo-text strong { color: #fff; }
.footer-about .logo-text small { color: #6E8198; }
.footer-about p { margin-top: 16px; font-size: 13.5px; line-height: 1.9; }
.footer-contact li { display: flex; gap: 10px; margin-bottom: 12px; align-items: baseline; }
.footer-contact .k { color: #FFB3BA; flex-shrink: 0; }
.footer-contact b { color: #fff; font-size: 20px; letter-spacing: 1px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 18px 0; font-size: 12.5px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; color: #6E8198; }
.footer-bottom a { color: #6E8198; }
.footer-bottom a:hover { color: #fff; }

/* ---------- 回到顶部 ---------- */
.to-top {
  position: fixed; right: 24px; bottom: 28px; z-index: 90;
  width: 46px; height: 46px; border-radius: 50%;
  background: var(--blue); color: #fff; font-size: 18px;
  box-shadow: var(--shadow-md); opacity: 0; visibility: hidden; transition: all .3s ease;
}
.to-top.show { opacity: 1; visibility: visible; }
.to-top:hover { background: var(--red); transform: translateY(-3px); }

/* ---------- 滚动显现（仅在启用 JS 时隐藏，保证无 JS 环境下内容可见，利于 SEO 抓取） ---------- */
html.js .reveal { opacity: 0; transform: translateY(26px); transition: opacity .6s ease, transform .6s ease; }
html.js .reveal.visible { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .stat-board { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer-main { grid-template-columns: 1fr 1fr; }
  .layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero-visual { max-width: 520px; }
}

@media (max-width: 768px) {
  .section { padding: 52px 0; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .topbar .tb-right span:first-child { display: none; }
  .nav-toggle { display: flex; }
  .nav-menu {
    position: fixed; top: 110px; left: 0; right: 0; bottom: 0;
    background: #fff; flex-direction: column; align-items: stretch;
    padding: 24px 20px 40px; gap: 4px; overflow-y: auto;
    transform: translateX(100%); transition: transform .3s ease; z-index: 99;
    box-shadow: -8px 0 30px rgba(0,0,0,.08);
  }
  .nav-menu.open { transform: translateX(0); }
  .nav-menu > li > a { padding: 14px 12px; font-size: 16.5px; border-radius: 12px; }
  .nav-menu > li.has-sub > a::after { display: none; }
  .submenu { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: none; padding: 0 0 6px 16px; display: none; }
  .nav-menu > li.has-sub.open .submenu { display: block; }
  .nav-cta .nav-tel { display: none; }
  .nav-cta .btn { padding: 9px 16px; font-size: 13.5px; }
  .stat-board { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .stat-item { padding: 24px 12px; }
  .hero-float.f2 { left: 4px; }
  .article { padding: 24px 18px; }
  .cta-banner { padding: 34px 24px; }
  .cta-banner .cb-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .grid-4 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .footer-main { grid-template-columns: 1fr; }
  .hero-actions .btn { width: 100%; justify-content: center; }
}

/* ---------- 无障碍 / 细节 ---------- */
:focus-visible { outline: 3px solid rgba(30,111,217,.5); outline-offset: 2px; }
::selection { background: var(--blue); color: #fff; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }