/* ============================================================
   智帮云SEO 官网 · 企业级科技蓝设计系统
   规范来源：智帮云SEO官网策划与WorkBuddy开发需求_V1.0
   ============================================================ */

/* ---------- 设计令牌 Design Tokens ---------- */
:root {
  /* 颜色 */
  --brand: #1267E8;            /* 品牌主蓝：主按钮、重点文字、关键图标 */
  --brand-deep: #0B3F91;       /* 深品牌蓝：标题、重点模块、导航强调 */
  --brand-hi: #2B9FFF;         /* 高亮蓝：渐变、图表、轻科技元素 */
  --bg-light: #EAF3FF;         /* 浅蓝背景：模块分区、卡片背景 */
  --bg-page: #FFFFFF;          /* 页面底色 */
  --bg-alt: #F7FAFF;           /* 交替底色 */
  --text-main: #1B2B41;        /* 正文主文字 */
  --text-sub: #5E6B7A;         /* 辅助文字 */
  --footer-bg: #0E2B52;        /* 深海军蓝：仅页脚/局部强调 */
  --border-card: #D7E4F5;      /* 卡片边框浅蓝灰 */
  --border-line: #E4EDF8;
  --success: #0FA76E;
  --warn: #E8992B;

  /* 圆角 */
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-pill: 999px;

  /* 阴影（轻量，避免模板站厚重浮层） */
  --shadow-sm: 0 1px 2px rgba(18, 103, 232, 0.06), 0 4px 12px rgba(18, 103, 232, 0.06);
  --shadow-md: 0 4px 10px rgba(11, 63, 145, 0.08), 0 12px 32px rgba(11, 63, 145, 0.10);

  /* 间距 */
  --space-section: 96px;
  --space-section-sm: 64px;

  /* 容器 */
  --container: 1280px;

  /* 字体 */
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC",
               -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* 渐变 */
  --grad-brand: linear-gradient(135deg, #1267E8 0%, #2B9FFF 100%);
  --grad-soft: linear-gradient(180deg, #F0F7FF 0%, #FFFFFF 100%);
}

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

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

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

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, select, textarea { font-family: inherit; font-size: 1rem; }

h1, h2, h3, h4 { color: var(--brand-deep); line-height: 1.3; font-weight: 700; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}

section { scroll-margin-top: 88px; }

/* ---------- 通用组件 ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: var(--bg-light);
  color: var(--brand);
  font-size: 14px;
  font-weight: 600;
}
.badge::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 0 3px rgba(18,103,232,0.18);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  transition: all .22s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--grad-brand);
  color: #fff;
  box-shadow: 0 6px 16px rgba(18, 103, 232, 0.30);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 22px rgba(18, 103, 232, 0.38); }
.btn-outline {
  border: 1.5px solid var(--brand);
  color: var(--brand);
  background: #fff;
}
.btn-outline:hover { background: var(--bg-light); transform: translateY(-2px); }
.btn-ghost {
  color: var(--brand-deep);
  background: transparent;
  padding: 13px 18px;
}
.btn-ghost:hover { color: var(--brand); }
.btn-lg { padding: 16px 34px; font-size: 16px; }
.btn-block { width: 100%; }

/* Section 头 */
.section-head { text-align: center; max-width: 760px; margin: 0 auto 56px; }
.section-head .badge { margin-bottom: 18px; }
.section-head h2 { font-size: 38px; margin-bottom: 16px; letter-spacing: .5px; }
.section-head p { color: var(--text-sub); font-size: 17px; }

/* 卡片 */
.card {
  background: #fff;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  transition: transform .25s ease, box-shadow .25s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }

/* ---------- Header / 导航 ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: all .25s ease;
}
.site-header.scrolled {
  background: #fff;
  border-bottom-color: var(--border-line);
  box-shadow: 0 4px 18px rgba(11,63,145,0.08);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}

.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-mark {
  width: 40px; height: 40px;
  border-radius: 11px;
  background: var(--grad-brand);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 10px rgba(18,103,232,0.3);
}
.logo-mark svg { width: 22px; height: 22px; }
.logo-text { font-size: 21px; font-weight: 800; color: var(--brand-deep); letter-spacing: .5px; }
.logo-text em { font-style: normal; color: var(--brand); }
.logo-sub { display: block; font-size: 10.5px; color: var(--text-sub); font-weight: 500; letter-spacing: 1px; margin-top: -2px; }

.main-nav ul { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  display: block;
  padding: 9px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-main);
  border-radius: 8px;
  transition: all .2s ease;
}
.main-nav a:hover { color: var(--brand); background: var(--bg-light); }
.main-nav a.active { color: var(--brand); font-weight: 600; }

.header-cta { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.header-cta .btn { padding: 11px 20px; }

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  border-radius: 10px;
  border: 1px solid var(--border-line);
  align-items: center;
  justify-content: center;
}
.nav-toggle span {
  display: block;
  width: 20px; height: 2px;
  background: var(--brand-deep);
  border-radius: 2px;
  position: relative;
  transition: all .25s ease;
}
.nav-toggle span::before, .nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0; width: 20px; height: 2px;
  background: var(--brand-deep);
  border-radius: 2px;
  transition: all .25s ease;
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }
.nav-toggle.open span { background: transparent; }
.nav-toggle.open span::before { top: 0; transform: rotate(45deg); }
.nav-toggle.open span::after { top: 0; transform: rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 150px 0 84px;
  background: var(--grad-soft);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  right: -160px; top: -120px;
  width: 560px; height: 560px;
  background: radial-gradient(circle, rgba(43,159,255,0.16) 0%, rgba(43,159,255,0) 70%);
}
.hero::after {
  content: "";
  position: absolute;
  left: -180px; bottom: -160px;
  width: 480px; height: 480px;
  background: radial-gradient(circle, rgba(18,103,232,0.10) 0%, rgba(18,103,232,0) 70%);
}
.hero .container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 64px;
  align-items: center;
}
.hero-kicker { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; }
.hero-kicker .badge { background: #fff; box-shadow: var(--shadow-sm); }
.hero-kicker .badge::before { background: var(--success); box-shadow: 0 0 0 3px rgba(15,167,110,0.18); }

.hero h1 {
  font-size: 52px;
  line-height: 1.22;
  letter-spacing: .5px;
  margin-bottom: 14px;
}
.hero h1 .hl {
  color: var(--brand);
  position: relative;
}
.hero-sub { font-size: 20px; font-weight: 600; color: var(--brand-deep); margin-bottom: 14px; }
.hero-desc { color: var(--text-sub); font-size: 17px; max-width: 560px; margin-bottom: 32px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 34px; }

/* 平台条 */
.platform-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 6px;
}
.platform-row .pl-label {
  font-size: 13px;
  color: var(--text-sub);
  margin-right: 6px;
}
.platform-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 13px;
  background: #fff;
  border: 1px solid var(--border-line);
  border-radius: var(--radius-pill);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--brand-deep);
  box-shadow: var(--shadow-sm);
}
.platform-chip svg { width: 16px; height: 16px; }

/* Hero 右侧数据面板 */
.hero-visual { position: relative; }
.dashboard {
  background: #fff;
  border: 1px solid var(--border-card);
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(11,63,145,0.16);
  padding: 26px;
}
.dash-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.dash-title { font-size: 15px; font-weight: 700; color: var(--brand-deep); }
.dash-live {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12.5px; color: var(--success); font-weight: 600;
}
.dash-live::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--success); animation: pulse 1.6s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .35; } }

.dash-metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 20px; }
.metric {
  background: var(--bg-alt);
  border: 1px solid var(--border-line);
  border-radius: 12px;
  padding: 12px 10px;
  text-align: center;
}
.metric .m-num { font-size: 19px; font-weight: 800; color: var(--brand-deep); line-height: 1.2; }
.metric .m-num .up { color: var(--success); font-size: 12px; }
.metric .m-label { font-size: 12px; color: var(--text-sub); margin-top: 2px; }

.dash-chart {
  background: var(--bg-alt);
  border: 1px solid var(--border-line);
  border-radius: 12px;
  padding: 14px;
  margin-bottom: 20px;
}
.dash-chart .chart-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.dash-chart .chart-head span { font-size: 13px; font-weight: 600; color: var(--brand-deep); }
.dash-chart .chart-head em { font-style: normal; font-size: 12.5px; color: var(--success); font-weight: 700; }
.chart-svg { width: 100%; height: 96px; }
.chart-svg .area { fill: rgba(43,159,255,0.12); }
.chart-svg .line { stroke: var(--brand); stroke-width: 3; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.chart-svg .dot { fill: var(--brand); stroke: #fff; stroke-width: 2.5; }

.dash-channels { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.channel {
  background: var(--bg-alt);
  border: 1px solid var(--border-line);
  border-radius: 12px;
  padding: 12px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.channel .donut { position: relative; width: 42px; height: 42px; flex-shrink: 0; }
.channel .donut svg { width: 42px; height: 42px; transform: rotate(-90deg); }
.channel .donut circle { fill: none; stroke-width: 5; }
.channel .donut .track { stroke: var(--border-line); }
.channel .donut .val { stroke: var(--brand); stroke-linecap: round; }
.channel .c-name { font-size: 12.5px; color: var(--text-sub); }
.channel .c-val { font-size: 14.5px; font-weight: 700; color: var(--brand-deep); }

.dash-note { margin-top: 16px; font-size: 12px; color: var(--text-sub); text-align: center; }

.float-card {
  position: absolute;
  background: #fff;
  border: 1px solid var(--border-card);
  border-radius: 14px;
  box-shadow: var(--shadow-md);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--brand-deep);
}
.float-card .fc-ico {
  width: 30px; height: 30px;
  border-radius: 9px;
  background: var(--bg-light);
  display: flex; align-items: center; justify-content: center;
}
.float-card .fc-ico svg { width: 17px; height: 17px; }
.fc-1 { top: -18px; left: -26px; animation: float 5s ease-in-out infinite; }
.fc-2 { bottom: 24px; right: -22px; animation: float 6s ease-in-out 1s infinite; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }

/* ---------- 通用区块 ---------- */
.section { padding: var(--space-section) 0; }
.section-alt { background: var(--bg-alt); }
.section-soft { background: var(--grad-soft); }

/* ---------- 痛点 Pain ---------- */
.pain-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.pain-card { padding: 30px 26px; }
.pain-card .p-num {
  font-size: 26px; font-weight: 800;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--brand-hi);
  margin-bottom: 16px;
  line-height: 1;
}
.pain-card h3 { font-size: 19px; margin-bottom: 8px; }
.pain-card p { color: var(--text-sub); font-size: 15px; }
.pain-ico {
  width: 46px; height: 46px;
  border-radius: 12px;
  background: var(--bg-light);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.pain-ico svg { width: 24px; height: 24px; }

/* ---------- 核心双服务 ---------- */
.dual-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.dual-card {
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  border-radius: 20px;
}
.dual-card .dc-head {
  padding: 34px 32px 0 32px;
}
.dual-card .dc-tag {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 700;
  color: #fff;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 16px;
}
.dc-tag.geo { background: var(--grad-brand); }
.dc-tag.city { background: linear-gradient(135deg, #0B3F91, #2B9FFF); }
.dc-tag.media { background: linear-gradient(135deg, #0F6B5B, #1FA463); }
.dc-tag.b2b { background: linear-gradient(135deg, #8B5CF6, #6366F1); }
.dual-card h3 { font-size: 26px; margin-bottom: 12px; }
.dual-card .dc-desc { color: var(--text-sub); font-size: 15.5px; }
.dual-card .dc-body { padding: 22px 32px 8px 32px; flex: 1; }
.dual-card ul { display: flex; flex-direction: column; gap: 12px; }
.dual-card ul li { display: flex; gap: 10px; align-items: flex-start; font-size: 15px; }
.dual-card ul li::before {
  content: "";
  flex-shrink: 0;
  width: 18px; height: 18px;
  margin-top: 3px;
  border-radius: 50%;
  background: var(--bg-light);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231267E8' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
  background-size: 10px;
  background-position: center;
  background-repeat: no-repeat;
}
.dual-card .dc-foot { padding: 16px 32px 30px 32px; display: flex; gap: 12px; align-items: center; }
.dual-card .dc-ico {
  width: 60px; height: 60px;
  border-radius: 16px;
  background: var(--bg-light);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.dual-card .dc-ico svg { width: 30px; height: 30px; }

/* GEO 系统详解 */
.geo-flow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; margin-top: 48px; position: relative; }
.geo-flow::before {
  content: "";
  position: absolute;
  top: 34px; left: 8%; right: 8%;
  height: 2px;
  background: linear-gradient(90deg, var(--brand-hi), var(--brand));
  opacity: .5;
}
.flow-step { position: relative; text-align: center; padding: 0 8px; }
.flow-step .fs-num {
  position: relative;
  z-index: 1;
  width: 68px; height: 68px;
  margin: 0 auto 16px;
  border-radius: 20px;
  background: #fff;
  border: 2px solid var(--brand);
  box-shadow: var(--shadow-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; font-weight: 800; color: var(--brand);
}
.flow-step h4 { font-size: 16.5px; margin-bottom: 8px; }
.flow-step p { font-size: 13.5px; color: var(--text-sub); }

.ai-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 44px; }
.ai-card {
  padding: 22px 18px;
  text-align: center;
  border-radius: var(--radius-card);
}
.ai-card .ai-logo {
  width: 52px; height: 52px;
  margin: 0 auto 12px;
  border-radius: 14px;
  background: var(--bg-light);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 800; color: var(--brand);
}
.ai-card h4 { font-size: 16px; margin-bottom: 4px; }
.ai-card p { font-size: 13px; color: var(--text-sub); }

/* GEO vs SEO 对比 */
.compare-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border-radius: 20px; overflow: hidden; border: 1px solid var(--border-card); }
.compare-col { padding: 40px 36px; }
.compare-col.old { background: #F5F7FA; }
.compare-col.new { background: linear-gradient(160deg, #EAF3FF 0%, #F0F7FF 100%); }
.compare-col h4 { display: flex; align-items: center; gap: 10px; font-size: 19px; margin-bottom: 22px; }
.compare-col h4 .tag { font-size: 12px; font-weight: 700; padding: 4px 10px; border-radius: var(--radius-pill); }
.compare-col.old h4 .tag { background: #E3E8EF; color: var(--text-sub); }
.compare-col.new h4 .tag { background: var(--brand); color: #fff; }
.compare-col ul { display: flex; flex-direction: column; gap: 16px; }
.compare-col ul li { display: flex; gap: 10px; font-size: 15px; color: var(--text-main); }
.compare-col ul li::before {
  content: "";
  flex-shrink: 0;
  width: 20px; height: 20px;
  margin-top: 3px;
  border-radius: 50%;
  background-size: 11px;
  background-position: center;
  background-repeat: no-repeat;
}
.compare-col.old ul li::before { background-color: #E3E8EF; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%235E6B7A' stroke-width='3' stroke-linecap='round'%3E%3Cline x1='18' y1='6' x2='6' y2='18'/%3E%3Cline x1='6' y1='6' x2='18' y2='18'/%3E%3C/svg%3E"); }
.compare-col.new ul li::before { background-color: var(--brand); background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E"); }

.compare-note {
  margin-top: 24px;
  padding: 18px 24px;
  border-radius: 14px;
  background: var(--bg-light);
  border-left: 4px solid var(--brand);
  font-size: 15.5px;
  font-weight: 600;
  color: var(--brand-deep);
}

/* ---------- 分站服务 ---------- */
.city-types { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 44px; }
.city-type-card { padding: 30px 26px; }
.city-type-card .ct-ico {
  width: 50px; height: 50px;
  border-radius: 14px;
  background: var(--bg-light);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.city-type-card .ct-ico svg { width: 26px; height: 26px; }
.city-type-card h4 { font-size: 18px; margin-bottom: 8px; }
.city-type-card p { font-size: 14.5px; color: var(--text-sub); }

/* 流程 */
.process-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; margin-top: 44px; }
.process-step { padding: 26px 20px; text-align: center; position: relative; }
.process-step .ps-num {
  font-size: 13px; font-weight: 800; color: #fff;
  background: var(--brand);
  width: 30px; height: 30px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 14px;
}
.process-step h4 { font-size: 16px; margin-bottom: 6px; }
.process-step p { font-size: 13.5px; color: var(--text-sub); }

/* ---------- 案例/证据 ---------- */
.evidence-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.evidence-card { padding: 28px 26px; display: flex; flex-direction: column; gap: 12px; }
.evidence-card .ev-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.evidence-card .ev-tags span {
  font-size: 12px; font-weight: 600;
  color: var(--brand);
  background: var(--bg-light);
  padding: 4px 10px;
  border-radius: var(--radius-pill);
}
.evidence-card h4 { font-size: 18px; }
.evidence-card p { font-size: 14px; color: var(--text-sub); flex: 1; }
.evidence-card .ev-meta { font-size: 12.5px; color: var(--text-sub); border-top: 1px dashed var(--border-card); padding-top: 12px; }

.asset-strip {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.asset-item {
  background: #fff;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-card);
  padding: 24px 20px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.asset-item .a-num { font-size: 26px; font-weight: 800; color: var(--brand); }
.asset-item .a-num.qual { font-size: 18px; color: var(--brand-deep); }
.asset-item .a-label { font-size: 13.5px; color: var(--text-sub); margin-top: 4px; }

/* ---------- FAQ ---------- */
.faq-list { max-width: 860px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item {
  background: #fff;
  border: 1px solid var(--border-card);
  border-radius: 14px;
  overflow: hidden;
  transition: border-color .2s;
}
.faq-item.open { border-color: var(--brand); box-shadow: var(--shadow-sm); }
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  text-align: left;
  font-size: 16.5px;
  font-weight: 600;
  color: var(--brand-deep);
}
.faq-q .faq-arrow {
  flex-shrink: 0;
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--bg-light);
  display: flex; align-items: center; justify-content: center;
  transition: transform .25s ease;
}
.faq-item.open .faq-arrow { transform: rotate(180deg); background: var(--brand); }
.faq-item.open .faq-arrow svg { stroke: #fff; }
.faq-arrow svg { width: 13px; height: 13px; stroke: var(--brand); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .3s ease; }
.faq-a-inner { padding: 0 24px 22px 24px; color: var(--text-sub); font-size: 15px; }

/* ---------- CTA ---------- */
.cta-block {
  position: relative;
  overflow: hidden;
  border-radius: 24px;
  background: linear-gradient(135deg, #0B3F91 0%, #1267E8 60%, #2B9FFF 100%);
  padding: 64px 56px;
  text-align: center;
  color: #fff;
}
.cta-block::before {
  content: "";
  position: absolute;
  right: -80px; top: -80px;
  width: 300px; height: 300px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
}
.cta-block h2 { color: #fff; font-size: 34px; margin-bottom: 12px; }
.cta-block p { color: rgba(255,255,255,0.88); font-size: 17px; margin-bottom: 32px; }
.cta-block .btn-primary { background: #fff; color: var(--brand); box-shadow: 0 8px 24px rgba(0,0,0,0.18); }
.cta-block .btn-primary:hover { background: var(--bg-light); }
.cta-points { display: flex; justify-content: center; gap: 28px; flex-wrap: wrap; margin-top: 26px; font-size: 14px; color: rgba(255,255,255,0.85); }
.cta-points span { display: flex; align-items: center; gap: 7px; }
.cta-points span::before { content: "✓"; color: #7fd4a8; font-weight: 800; }

/* ---------- Footer ---------- */
.site-footer { background: var(--footer-bg); color: rgba(255,255,255,0.78); padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 48px; }
.footer-brand .logo-text { color: #fff; }
.footer-brand .logo-text em { color: var(--brand-hi); }
.footer-brand .logo-sub { color: rgba(255,255,255,0.55); }
.footer-brand p { font-size: 14px; margin-top: 18px; max-width: 320px; line-height: 1.8; }
.footer-col h4 { color: #fff; font-size: 15.5px; margin-bottom: 18px; }
.footer-col ul { display: flex; flex-direction: column; gap: 11px; }
.footer-col ul a { font-size: 14px; color: rgba(255,255,255,0.72); transition: color .2s; }
.footer-col ul a:hover { color: #fff; }
.footer-contact li { display: flex; gap: 10px; font-size: 14px; align-items: flex-start; }
.footer-contact li svg { width: 17px; height: 17px; flex-shrink: 0; margin-top: 3px; }
.footer-contact li .fc-label { color: rgba(255,255,255,0.5); display: block; font-size: 12px; }
.footer-qr { margin-top: 14px; display: flex; align-items: center; gap: 12px; }
.qr-placeholder,
.qr-img {
  width: 76px; height: 76px;
  background: #fff;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: var(--brand-deep);
  font-size: 11px;
  font-weight: 600;
  text-align: center;
  padding: 6px;
}
.qr-img {
  object-fit: cover;
  border: none;
}
.qr-img.qr-lg {
  width: 92px;
  height: 92px;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding: 20px 0;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

/* ---------- 浮动微信按钮 ---------- */
.float-weixin {
  position: fixed;
  right: 24px; bottom: 24px;
  z-index: 90;
  width: 52px; height: 52px;
  border-radius: 50%;
  background: var(--grad-brand);
  box-shadow: 0 8px 20px rgba(18,103,232,0.4);
  display: flex; align-items: center; justify-content: center;
  transition: transform .2s;
}
.float-weixin:hover { transform: scale(1.08); }
.float-weixin svg { width: 26px; height: 26px; }
.float-weixin .fw-tip {
  position: absolute;
  right: 60px; top: 50%;
  transform: translateY(-50%);
  background: #fff;
  border: 1px solid var(--border-card);
  box-shadow: var(--shadow-md);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 13px;
  color: var(--brand-deep);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s;
}
.float-weixin:hover .fw-tip { opacity: 1; }

/* ---------- 表单 ---------- */
.form-card {
  background: #fff;
  border: 1px solid var(--border-card);
  border-radius: 20px;
  box-shadow: var(--shadow-md);
  padding: 40px 36px;
  max-width: 640px;
}
.form-row { margin-bottom: 20px; }
.form-row label { display: block; font-size: 14px; font-weight: 600; color: var(--brand-deep); margin-bottom: 8px; }
.form-row label .req { color: var(--warn); }
.form-row input, .form-row select, .form-row textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--border-card);
  border-radius: 10px;
  background: var(--bg-alt);
  color: var(--text-main);
  transition: border-color .2s, box-shadow .2s;
  outline: none;
}
.form-row input:focus, .form-row select:focus, .form-row textarea:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(18,103,232,0.12);
  background: #fff;
}
.form-row textarea { resize: vertical; min-height: 96px; }
.form-grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-note { font-size: 12.5px; color: var(--text-sub); margin-top: 12px; }
.form-ok {
  display: none;
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: 12px;
  background: #E7F7EF;
  color: var(--success);
  font-size: 14.5px;
  font-weight: 600;
}
.form-err {
  display: none;
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: 12px;
  background: #FDEDEC;
  color: #C0392B;
  font-size: 14.5px;
  font-weight: 600;
}

/* ---------- 页面头（内页） ---------- */
.page-hero {
  padding: 150px 0 72px;
  background: var(--grad-soft);
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border-line);
}
.page-hero::after {
  content: "";
  position: absolute;
  right: -120px; top: -120px;
  width: 420px; height: 420px;
  background: radial-gradient(circle, rgba(43,159,255,0.16) 0%, rgba(43,159,255,0) 70%);
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 { font-size: 44px; margin: 16px 0 14px; }
.page-hero .ph-desc { font-size: 17px; color: var(--text-sub); max-width: 680px; }
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 13.5px; color: var(--text-sub); }
.breadcrumb a { color: var(--text-sub); }
.breadcrumb a:hover { color: var(--brand); }
.breadcrumb span { color: var(--brand-deep); font-weight: 600; }
.breadcrumb .sep { color: var(--border-card); }

/* ---------- 分站城市入口 ---------- */
.city-entrance { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 40px; }
.city-pill {
  background: #fff;
  border: 1px solid var(--border-card);
  border-radius: 12px;
  padding: 16px;
  text-align: center;
  transition: all .2s;
  box-shadow: var(--shadow-sm);
}
.city-pill:hover { border-color: var(--brand); transform: translateY(-3px); }
.city-pill .cp-name { font-size: 16px; font-weight: 700; color: var(--brand-deep); }
.city-pill .cp-desc { font-size: 12.5px; color: var(--text-sub); margin-top: 3px; }

/* ---------- 内容/图文块 ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.split .sec-text h2 { font-size: 34px; margin-bottom: 16px; }
.split .sec-text > p { color: var(--text-sub); font-size: 16px; margin-bottom: 20px; }
.split ul.check li { display: flex; gap: 10px; margin-bottom: 12px; font-size: 15.5px; align-items: flex-start; }
.split ul.check li::before {
  content: "";
  flex-shrink: 0;
  width: 20px; height: 20px;
  margin-top: 4px;
  border-radius: 50%;
  background: var(--brand);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
  background-size: 11px;
  background-position: center;
  background-repeat: no-repeat;
}
.visual-box {
  background: #fff;
  border: 1px solid var(--border-card);
  border-radius: 20px;
  box-shadow: var(--shadow-md);
  padding: 30px;
}

/* ============================================================
   新增栏目组件：核心服务 / 成功案例 / 商学院 / 新闻中心
   ============================================================ */

/* ---------- 导航 8 栏目适配 ---------- */
.main-nav a { padding: 9px 11px; font-size: 14.5px; }

/* ---------- 数据统计条（成功案例页顶部） ---------- */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
}
.stats-bar .st-item {
  background: #fff;
  border: 1px solid var(--border-card);
  border-radius: 16px;
  padding: 22px 18px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.stats-bar .st-num {
  font-size: 30px;
  font-weight: 800;
  color: var(--brand-deep);
  line-height: 1.15;
}
.stats-bar .st-num em { font-style: normal; font-size: 16px; font-weight: 700; color: var(--brand); }
.stats-bar .st-label { margin-top: 6px; font-size: 13px; color: var(--text-sub); }

/* ---------- 案例筛选 ---------- */
.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 34px;
}
.filter-btn {
  padding: 9px 20px;
  border-radius: 999px;
  border: 1px solid var(--border-line);
  background: #fff;
  color: var(--text-sub);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all .2s ease;
  font-family: inherit;
}
.filter-btn:hover { border-color: var(--brand); color: var(--brand); }
.filter-btn.active {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
  font-weight: 600;
}

/* ---------- 案例卡片 ---------- */
.case-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.case-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--border-card);
  border-radius: 18px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform .25s ease, box-shadow .25s ease;
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.case-card.hide { display: none; }
.case-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 22px 24px 16px;
  border-bottom: 1px dashed var(--border-line);
}
.case-name { font-size: 17px; font-weight: 700; color: var(--text-main); line-height: 1.4; }
.case-region {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-top: 6px;
  font-size: 12.5px;
  color: var(--text-sub);
}
.case-cat {
  flex-shrink: 0;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--bg-light);
  color: var(--brand);
  font-size: 12.5px;
  font-weight: 600;
  white-space: nowrap;
}
.case-body { padding: 18px 24px; flex: 1; }
.case-kw-label {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--brand);
  letter-spacing: .5px;
  margin-bottom: 10px;
}
.kw-chips { display: flex; flex-wrap: wrap; gap: 7px; }
.kw-chip {
  padding: 5px 11px;
  border-radius: 8px;
  background: #F4F8FF;
  border: 1px solid #DCE9FD;
  color: var(--brand-deep);
  font-size: 12.5px;
  line-height: 1.45;
}
.kw-chip.more {
  background: transparent;
  border-style: dashed;
  color: var(--text-sub);
}
.case-nums {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px dashed var(--border-line);
}
.cn-item { text-align: center; }
.cn-item .cn-num { font-size: 19px; font-weight: 800; color: var(--brand); line-height: 1.2; }
.cn-item .cn-label { font-size: 11.5px; color: var(--text-sub); margin-top: 3px; }
.case-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 13px 24px;
  background: #FAFCFF;
  border-top: 1px solid var(--border-card);
}
.case-note { font-size: 12px; color: var(--text-sub); }
.case-link {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--brand);
  text-decoration: none;
  white-space: nowrap;
}
.case-link:hover { text-decoration: underline; }

/* ---------- 案例说明横幅 ---------- */
.case-tip {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-top: 30px;
  padding: 16px 20px;
  border-radius: 14px;
  background: var(--bg-light);
  border: 1px solid #D6E6FD;
  font-size: 13.5px;
  color: var(--text-sub);
  line-height: 1.7;
}
.case-tip strong { color: var(--brand-deep); }

/* ---------- 关键词方法论 ---------- */
.method-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.method-step {
  position: relative;
  background: #fff;
  border: 1px solid var(--border-card);
  border-radius: 16px;
  padding: 24px 20px;
  box-shadow: var(--shadow-sm);
}
.method-step .ms-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px; height: 34px;
  border-radius: 10px;
  background: var(--brand);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 14px;
}
.method-step h4 { font-size: 16px; font-weight: 700; color: var(--text-main); margin-bottom: 8px; }
.method-step p { font-size: 13.5px; color: var(--text-sub); line-height: 1.7; }
.method-step .ms-eg {
  margin-top: 10px;
  padding: 9px 11px;
  border-radius: 8px;
  background: #F4F8FF;
  font-size: 12.5px;
  color: var(--brand-deep);
  line-height: 1.6;
}

.matrix-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.matrix-card {
  background: #fff;
  border: 1px solid var(--border-card);
  border-radius: 16px;
  padding: 22px;
  box-shadow: var(--shadow-sm);
}
.matrix-card h4 { font-size: 15.5px; font-weight: 700; color: var(--text-main); margin-bottom: 6px; }
.matrix-card .mx-desc { font-size: 13px; color: var(--text-sub); line-height: 1.65; margin-bottom: 12px; }
.matrix-card .kw-chips .kw-chip { background: #F7F9FC; border-color: #E3EAF3; color: var(--text-main); }

/* ---------- 服务页对比表 ---------- */
.value-table-wrap {
  background: #fff;
  border: 1px solid var(--border-card);
  border-radius: 18px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.value-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.value-table th, .value-table td {
  padding: 15px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border-line);
  line-height: 1.65;
  vertical-align: top;
}
.value-table thead th {
  background: #F7FAFF;
  font-weight: 700;
  color: var(--brand-deep);
  font-size: 14.5px;
}
.value-table thead th:last-child { color: var(--brand); }
.value-table tbody tr:last-child td { border-bottom: none; }
.value-table td.dim { color: var(--text-sub); }
.value-table td.dim::before { content: "× "; color: #E36D6D; font-weight: 700; }
.value-table td.gain { color: var(--text-main); font-weight: 500; }
.value-table td.gain::before { content: "✓ "; color: #1FA463; font-weight: 700; }

/* ---------- 商学院 ---------- */
.course-track {
  background: #fff;
  border: 1px solid var(--border-card);
  border-radius: 18px;
  padding: 28px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
}
.track-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}
.track-head .tk-badge {
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--brand);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
}
.track-head h3 { font-size: 18px; font-weight: 700; color: var(--text-main); }
.track-head .tk-sub { margin-left: auto; font-size: 12.5px; color: var(--text-sub); white-space: nowrap; }
.lesson-row {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 12px 14px;
  border-radius: 10px;
  transition: background .2s ease;
}
.lesson-row:hover { background: var(--bg-light); }
.lesson-row .ls-num { font-size: 13px; font-weight: 700; color: var(--brand); flex-shrink: 0; min-width: 34px; }
.lesson-row .ls-title { font-size: 14.5px; font-weight: 600; color: var(--text-main); }
.lesson-row .ls-desc { font-size: 12.5px; color: var(--text-sub); margin-top: 2px; line-height: 1.6; }
.lesson-row .ls-tag {
  margin-left: auto;
  flex-shrink: 0;
  font-size: 11.5px;
  color: var(--brand);
  background: var(--bg-light);
  padding: 3px 10px;
  border-radius: 999px;
  white-space: nowrap;
}

/* ---------- 新闻中心 ---------- */
.news-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 28px;
  align-items: start;
}
.news-item {
  display: flex;
  gap: 20px;
  background: #fff;
  border: 1px solid var(--border-card);
  border-radius: 16px;
  padding: 22px 24px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 18px;
  transition: transform .22s ease, box-shadow .22s ease;
}
.news-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.ni-date {
  flex-shrink: 0;
  width: 62px;
  text-align: center;
  padding-top: 4px;
}
.ni-date .ni-d { font-size: 26px; font-weight: 800; color: var(--brand); line-height: 1.1; }
.ni-date .ni-m { font-size: 12px; color: var(--text-sub); margin-top: 2px; }
.ni-main { flex: 1; min-width: 0; }
.ni-cats { display: flex; gap: 8px; margin-bottom: 8px; }
.ni-cat {
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--bg-light);
  color: var(--brand);
  font-size: 11.5px;
  font-weight: 600;
}
.ni-cat.grey { background: #F1F4F9; color: var(--text-sub); }
.ni-title { font-size: 16.5px; font-weight: 700; color: var(--text-main); line-height: 1.5; margin-bottom: 7px; }
.ni-desc { font-size: 13.5px; color: var(--text-sub); line-height: 1.7; }
.news-side { position: sticky; top: 96px; }
.side-card {
  background: #fff;
  border: 1px solid var(--border-card);
  border-radius: 16px;
  padding: 22px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 20px;
}
.side-card h4 { font-size: 15px; font-weight: 700; color: var(--text-main); margin-bottom: 14px; }
.side-card ul { list: none; margin: 0; padding: 0; }
.side-card li {
  padding: 9px 0;
  border-bottom: 1px dashed var(--border-line);
  font-size: 13.5px;
  color: var(--text-sub);
  line-height: 1.6;
}
.side-card li:last-child { border-bottom: none; }
.side-card li strong { color: var(--text-main); font-weight: 600; }

/* ---------- 新增：响应式 ---------- */
@media (min-width: 1025px) and (max-width: 1380px) {
  .header-cta .btn-outline { display: none; }
  .main-nav a { padding: 9px 9px; font-size: 14px; }
}
@media (max-width: 1200px) {
  .method-grid { grid-template-columns: repeat(2, 1fr); }
  .matrix-grid { grid-template-columns: repeat(2, 1fr); }
  .news-layout { grid-template-columns: 1fr; }
  .news-side { position: static; }
  .stats-bar { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
  .stats-bar { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .stats-bar .st-num { font-size: 24px; }
  .case-grid { grid-template-columns: 1fr; }
  .method-grid { grid-template-columns: 1fr; }
  .matrix-grid { grid-template-columns: 1fr; }
  .value-table thead { display: none; }
  .value-table tbody td { display: block; border-bottom: none; padding: 8px 18px; }
  .value-table tbody td:first-child { padding-top: 16px; font-weight: 700; color: var(--brand-deep); background: #F7FAFF; }
  .value-table tbody td:not(:first-child)::before {
    content: attr(data-th);
    display: inline-block;
    margin-right: 8px;
    font-size: 12px;
    font-weight: 700;
  }
  .value-table tbody td.dim[data-th]::before { color: #E36D6D; }
  .value-table tbody td.gain[data-th]::before { color: #1FA463; }
  .value-table tbody tr { display: block; border-bottom: 1px solid var(--border-line); padding-bottom: 8px; }
  .value-table tbody tr:last-child { border-bottom: none; }
  .value-table td.dim::before { content: "× "; color: #E36D6D; font-weight: 700; }
  .value-table td.gain::before { content: "✓ "; color: #1FA463; font-weight: 700; }
  .track-head { flex-wrap: wrap; }
  .track-head .tk-sub { margin-left: 0; width: 100%; }
  .lesson-row { flex-wrap: wrap; gap: 8px; }
  .lesson-row .ls-tag { margin-left: 48px; }
  .news-item { flex-direction: column; gap: 12px; }
  .ni-date { display: flex; align-items: baseline; gap: 6px; width: auto; padding: 0; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1200px) {
  .geo-flow { grid-template-columns: repeat(3, 1fr); gap: 28px; }
  .geo-flow::before { display: none; }
  .process-grid { grid-template-columns: repeat(3, 1fr); }
  .city-entrance { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 1024px) {
  :root { --space-section: 72px; }
  .main-nav { display: none; }
  .nav-toggle { display: inline-flex; }
  .header-cta .btn-outline { display: none; }
  .hero { padding-top: 120px; }
  .hero .container { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { max-width: 560px; margin: 0 auto; }
  .hero h1 { font-size: 42px; }
  .dual-grid { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }

  /* 移动端导航抽屉 */
  .main-nav.mobile-open {
    display: block;
    position: absolute;
    top: 72px; left: 0; right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border-line);
    box-shadow: var(--shadow-md);
    padding: 12px 24px 20px;
  }
  .main-nav.mobile-open ul { flex-direction: column; align-items: stretch; gap: 2px; }
  .main-nav.mobile-open a { padding: 12px 14px; font-size: 16px; }
}

@media (max-width: 768px) {
  :root { --space-section: 56px; }
  .container { padding: 0 20px; }
  .hero { padding: 108px 0 56px; }
  .hero h1 { font-size: 32px; }
  .hero-sub { font-size: 17px; }
  .hero-desc { font-size: 15.5px; }
  .section-head h2 { font-size: 28px; }
  .section-head p { font-size: 15px; }
  .section-head { margin-bottom: 40px; }
  .pain-grid { grid-template-columns: 1fr; }
  .dual-card .dc-head, .dual-card .dc-body, .dual-card .dc-foot { padding-left: 22px; padding-right: 22px; }
  .geo-flow { grid-template-columns: 1fr 1fr; gap: 20px; }
  .process-grid { grid-template-columns: 1fr; }
  .ai-grid { grid-template-columns: repeat(2, 1fr); }
  .compare-wrap { grid-template-columns: 1fr; }
  .city-types { grid-template-columns: 1fr; }
  .city-entrance { grid-template-columns: repeat(2, 1fr); }
  .evidence-grid { grid-template-columns: 1fr; }
  .asset-strip { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .cta-block { padding: 48px 24px; }
  .cta-block h2 { font-size: 26px; }
  .form-grid2 { grid-template-columns: 1fr; }
  .form-card { padding: 28px 22px; }
  .page-hero { padding: 120px 0 48px; }
  .page-hero h1 { font-size: 32px; }
  .float-card.fc-1 { left: -10px; }
  .float-card.fc-2 { right: -8px; }
}

/* ---------- 增值服务模块 ---------- */
.value-added-intro {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
  color: var(--text-sub);
  font-size: 15.5px;
  line-height: 1.7;
}
.b2b-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.b2b-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 14px 8px;
  border-radius: 12px;
  background: #F7FAFF;
  border: 1px solid #DCE9FD;
  text-align: center;
  min-height: 80px;
}
.b2b-card strong {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--text-main);
}
.b2b-card .price {
  font-size: 13px;
  font-weight: 700;
  color: var(--brand);
}
.media-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.dc-foot .price-note {
  font-size: 12.5px;
  color: var(--text-sub);
  margin-left: auto;
}

@media (max-width: 768px) {
  .b2b-grid { grid-template-columns: repeat(2, 1fr); }
  .dc-foot { flex-wrap: wrap; }
  .dc-foot .price-note { width: 100%; margin-left: 0; margin-top: 8px; }
}

/* 动画 */
.fade-up { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.fade-up.in-view { opacity: 1; transform: none; }

/* 无 JS 兜底 */
.no-js .faq-a { max-height: none; }