/* ==========================================================================
   聪脉智能科技(重庆)有限公司 — 官网 Demo
   配色：工业科技蓝 + 浅灰 商务风格
   ========================================================================== */

:root {
  /* 主色 —— 工业科技蓝 */
  --brand: #0b5aa8;          /* 主蓝 */
  --brand-deep: #08437d;     /* 深蓝 */
  --brand-bright: #1483d8;   /* 亮蓝 */
  --brand-sky: #4da3e8;      /* 浅蓝 */
  --brand-tint: #eaf3fb;     /* 极浅蓝底 */
  --brand-glow: rgba(11, 90, 168, .16);

  /* 浅灰体系 */
  --gray-bg: #f5f7fa;        /* 页面浅灰底 */
  --gray-card: #eef2f6;      /* 卡片灰底 */
  --gray-line: #e3e8ee;      /* 分割线 */
  --gray-mid: #8a94a2;       /* 次级文字 */
  --gray-deep: #5a6572;      /* 说明文字 */

  /* 文字 */
  --ink: #1e2a37;            /* 主文字 */
  --ink-soft: #47525f;       /* 正文 */
  --white: #ffffff;

  /* 尺寸 */
  --wrap: 1200px;
  --radius: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 2px 10px rgba(30, 42, 55, .06);
  --shadow-md: 0 8px 28px rgba(30, 42, 55, .10);
  --shadow-lg: 0 18px 48px rgba(30, 42, 55, .14);
  --transition: .28s cubic-bezier(.4, 0, .2, 1);
}

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

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

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB",
    "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.7;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }

/* ==========================================================================
   通用组件
   ========================================================================== */

/* 区块标题 */
.section { padding: 78px 0; }
.section--gray { background: var(--gray-bg); }

.sec-head { text-align: center; margin-bottom: 48px; }
.sec-head .eyebrow {
  display: inline-block; font-size: 13px; letter-spacing: 3px;
  color: var(--brand-bright); font-weight: 600; text-transform: uppercase;
}
.sec-head .eyebrow::before, .sec-head .eyebrow::after {
  content: ""; display: inline-block; width: 26px; height: 1px;
  background: var(--brand-bright); vertical-align: middle; margin: 0 10px; opacity: .5;
}
.sec-head h2 { font-size: 32px; font-weight: 700; color: var(--ink); margin-top: 10px; letter-spacing: 1px; }
.sec-head p { color: var(--gray-deep); margin-top: 14px; font-size: 15px; }

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 30px; border-radius: 6px; font-size: 15px; font-weight: 600;
  letter-spacing: 1px; transition: var(--transition); border: 1px solid transparent;
}
.btn-primary { background: var(--brand); color: #fff; box-shadow: 0 6px 18px var(--brand-glow); }
.btn-primary:hover { background: var(--brand-deep); transform: translateY(-2px); box-shadow: 0 10px 24px var(--brand-glow); }
.btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.55); }
.btn-ghost:hover { background: rgba(255,255,255,.14); border-color: #fff; }
.btn-line { background: #fff; color: var(--brand); border-color: var(--brand); }
.btn-line:hover { background: var(--brand); color: #fff; }

/* ==========================================================================
   顶部导航
   ========================================================================== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.96); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--gray-line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 74px; }

.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 42px; height: 42px; border-radius: 10px; flex: none;
  background: linear-gradient(135deg, var(--brand-bright), var(--brand-deep));
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 6px 16px var(--brand-glow);
}
.brand-name { font-size: 20px; font-weight: 700; letter-spacing: 1px; color: var(--ink); line-height: 1.2; }
.brand-name span { color: var(--brand); }
.brand-sub { font-size: 11px; color: var(--gray-mid); letter-spacing: 2px; }

.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav a {
  display: block; padding: 10px 20px; font-size: 15px; font-weight: 500;
  color: var(--ink-soft); border-radius: 6px; position: relative; transition: var(--transition);
}
.main-nav a:hover { color: var(--brand); }
.main-nav a.active { color: var(--brand); font-weight: 600; }
.main-nav a.active::after {
  content: ""; position: absolute; left: 20px; right: 20px; bottom: 2px;
  height: 2px; background: var(--brand); border-radius: 2px;
}

.nav-cta { margin-left: 10px; }
.nav-cta .btn { padding: 9px 22px; font-size: 14px; }

/* 移动端汉堡 */
.nav-toggle { display: none; background: none; border: 0; width: 40px; height: 40px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--ink); margin: 5px auto; border-radius: 2px; transition: var(--transition); }

/* ==========================================================================
   Hero Banner（首页）
   ========================================================================== */
.hero {
  position: relative; overflow: hidden; color: #fff;
  background: linear-gradient(135deg, #063a6d 0%, #0b5aa8 48%, #1483d8 100%);
  padding: 116px 0 126px;
}
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(ellipse at 50% 40%, #000 30%, transparent 78%);
}
.hero::before {
  content: ""; position: absolute; width: 560px; height: 560px; right: -120px; top: -180px;
  border-radius: 50%; background: radial-gradient(circle, rgba(77,163,232,.5), transparent 65%);
}
.hero::after {
  content: ""; position: absolute; width: 460px; height: 460px; left: -140px; bottom: -200px;
  border-radius: 50%; background: radial-gradient(circle, rgba(20,131,216,.45), transparent 65%);
}
.hero .wrap { position: relative; z-index: 2; }

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; padding: 8px 16px;
  border: 1px solid rgba(255,255,255,.35); border-radius: 30px;
  font-size: 13px; letter-spacing: 2px; background: rgba(255,255,255,.08);
}
.hero h1 { font-size: 46px; font-weight: 700; letter-spacing: 2px; margin: 26px 0 18px; line-height: 1.3; }
.hero h1 .accent { color: #7cc4ff; }
.hero-sub { font-size: 18px; color: rgba(255,255,255,.88); max-width: 640px; letter-spacing: 1px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero-tags span {
  padding: 8px 18px; border-radius: 6px; font-size: 14px; letter-spacing: 1px;
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.22);
}
.hero-actions { display: flex; gap: 16px; margin-top: 40px; }

.hero-stats { display: flex; gap: 56px; margin-top: 64px; }
.hero-stat .num { font-size: 34px; font-weight: 700; color: #fff; line-height: 1; }
.hero-stat .num small { font-size: 16px; font-weight: 600; margin-left: 2px; }
.hero-stat .label { font-size: 13px; color: rgba(255,255,255,.72); margin-top: 8px; letter-spacing: 1px; }

/* ==========================================================================
   企业简介（首页）
   ========================================================================== */
.intro-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 60px; align-items: center; }
.intro-copy h2 { font-size: 30px; font-weight: 700; margin-bottom: 22px; letter-spacing: 1px; }
.intro-copy h2 span { color: var(--brand); }
.intro-copy p { color: var(--ink-soft); margin-bottom: 16px; }
.intro-points { margin-top: 26px; display: grid; gap: 14px; }
.intro-point { display: flex; gap: 14px; align-items: flex-start; }
.intro-point .dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--brand-bright);
  margin-top: 9px; flex: none; box-shadow: 0 0 0 4px var(--brand-tint);
}
.intro-point b { color: var(--ink); font-weight: 600; }
.intro-point p { color: var(--gray-deep); font-size: 14px; margin: 2px 0 0; }

.intro-visual { position: relative; }
.intro-card {
  background: #fff; border: 1px solid var(--gray-line); border-radius: var(--radius-lg);
  padding: 34px 36px; box-shadow: var(--shadow-md);
}
.intro-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 22px; color: var(--ink); }
.axis-item { display: flex; align-items: center; gap: 14px; padding: 13px 0; border-bottom: 1px dashed var(--gray-line); }
.axis-item:last-child { border-bottom: 0; }
.axis-item .ic { width: 42px; height: 42px; border-radius: 9px; flex: none; display: flex; align-items: center; justify-content: center; }
.axis-item .ic svg { width: 22px; height: 22px; }
.axis-item .txt b { display: block; font-size: 15px; color: var(--ink); }
.axis-item .txt span { font-size: 13px; color: var(--gray-mid); }

/* ==========================================================================
   核心业务速览卡片（首页）
   ========================================================================== */
.biz-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.biz-card {
  position: relative; background: #fff; border: 1px solid var(--gray-line);
  border-radius: var(--radius-lg); padding: 34px 30px; overflow: hidden;
  transition: var(--transition); box-shadow: var(--shadow-sm);
}
.biz-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--brand-sky); }
.biz-card::before {
  content: ""; position: absolute; left: 0; top: 0; width: 100%; height: 4px;
  background: linear-gradient(90deg, var(--brand-bright), var(--brand-sky)); opacity: 0; transition: var(--transition);
}
.biz-card:hover::before { opacity: 1; }
.biz-card .tag {
  display: inline-block; font-size: 12px; letter-spacing: 1px; font-weight: 600;
  color: var(--brand-bright); background: var(--brand-tint); padding: 4px 12px; border-radius: 20px;
}
.biz-card .ic {
  width: 54px; height: 54px; border-radius: 12px; margin: 20px 0 18px;
  background: var(--brand-tint); display: flex; align-items: center; justify-content: center;
}
.biz-card .ic svg { width: 28px; height: 28px; }
.biz-card h3 { font-size: 18px; font-weight: 700; color: var(--ink); margin-bottom: 10px; }
.biz-card p { font-size: 14px; color: var(--gray-deep); }
.biz-card .more { display: inline-flex; align-items: center; gap: 6px; margin-top: 18px; font-size: 14px; font-weight: 600; color: var(--brand); }
.biz-card .more:hover { color: var(--brand-deep); }

/* ==========================================================================
   合作客户 Logo 墙（首页）
   ========================================================================== */
.logo-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 20px; }
.logo-tile {
  background: #fff; border: 1px solid var(--gray-line); border-radius: 10px;
  height: 96px; display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 8px; color: var(--gray-mid); transition: var(--transition); filter: grayscale(1); opacity: .8;
}
.logo-tile:hover { filter: none; opacity: 1; border-color: var(--brand-sky); box-shadow: var(--shadow-md); }
.logo-tile .mark { width: 34px; height: 34px; }
.logo-tile span { font-size: 13px; letter-spacing: 1px; }

/* ==========================================================================
   底部
   ========================================================================== */
.site-footer { background: #0d2237; color: rgba(255,255,255,.75); }
.footer-main { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 44px; padding: 60px 0 44px; }
.footer-brand .brand-name { color: #fff; }
.footer-brand .brand-name span { color: #7cc4ff; }
.footer-brand .brand-sub { color: rgba(255,255,255,.45); }
.footer-brand p { font-size: 13px; margin-top: 16px; max-width: 300px; color: rgba(255,255,255,.6); }

.footer-col h4 { color: #fff; font-size: 15px; font-weight: 600; margin-bottom: 18px; letter-spacing: 1px; }
.footer-col ul li { margin-bottom: 11px; }
.footer-col ul a { font-size: 13.5px; color: rgba(255,255,255,.65); transition: var(--transition); }
.footer-col ul a:hover { color: #7cc4ff; }
.footer-contact li { display: flex; gap: 10px; font-size: 13.5px; margin-bottom: 12px; align-items: flex-start; }
.footer-contact svg { width: 16px; height: 16px; flex: none; margin-top: 3px; }

.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); padding: 20px 0; font-size: 13px; color: rgba(255,255,255,.5); }
.footer-bottom .wrap { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.footer-bottom .icp-link { color: rgba(255,255,255,.5); transition: var(--transition); }
.footer-bottom .icp-link:hover { color: #7cc4ff; }

/* ==========================================================================
   页面内页 Banner（解决方案 / 联系我们）
   ========================================================================== */
.page-hero {
  background: linear-gradient(135deg, #063a6d 0%, #0b5aa8 55%, #1483d8 100%);
  color: #fff; padding: 74px 0; position: relative; overflow: hidden;
}
.page-hero .grid-bg {
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse at 50% 50%, #000 20%, transparent 80%);
}
.page-hero .wrap { position: relative; z-index: 2; }
.page-hero h1 { font-size: 36px; font-weight: 700; letter-spacing: 2px; }
.page-hero p { font-size: 15px; color: rgba(255,255,255,.82); margin-top: 12px; letter-spacing: 1px; }

.breadcrumb { font-size: 13px; color: rgba(255,255,255,.6); margin-bottom: 16px; letter-spacing: 1px; }
.breadcrumb a:hover { color: #fff; }
.breadcrumb .sep { margin: 0 8px; }

/* ==========================================================================
   解决方案 —— 二级导航标签
   ========================================================================== */
.tabs-wrap { background: #fff; border-bottom: 1px solid var(--gray-line); position: sticky; top: 74px; z-index: 90; }
.tabs { display: flex; gap: 8px; }
.tab {
  padding: 18px 34px; font-size: 16px; font-weight: 600; color: var(--ink-soft);
  background: none; border: 0; border-bottom: 3px solid transparent; transition: var(--transition); letter-spacing: 1px;
}
.tab:hover { color: var(--brand); }
.tab.active { color: var(--brand); border-bottom-color: var(--brand); }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* 产品模块（工业应用） */
.product-module { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; padding: 70px 0; }
.product-module + .product-module { border-top: 1px solid var(--gray-line); }
.pm-info .pm-tag {
  display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: 2px;
  color: var(--brand); background: var(--brand-tint); padding: 5px 14px; border-radius: 20px;
}
.pm-info h3 { font-size: 26px; font-weight: 700; margin: 16px 0 14px; letter-spacing: 1px; }
.pm-info h3 .en { display: block; font-size: 14px; color: var(--brand-bright); font-weight: 600; letter-spacing: 2px; margin-bottom: 6px; }
.pm-info > p { color: var(--ink-soft); }
.pm-desc { color: var(--gray-deep); font-size: 14.5px; margin-top: 14px; }

.feat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 26px; }
.feat {
  display: flex; gap: 12px; align-items: flex-start; background: var(--gray-bg);
  border: 1px solid var(--gray-line); border-radius: 9px; padding: 15px 16px; transition: var(--transition);
}
.feat:hover { background: var(--brand-tint); border-color: var(--brand-sky); }
.feat .fi {
  width: 38px; height: 38px; border-radius: 8px; flex: none; background: #fff;
  display: flex; align-items: center; justify-content: center; box-shadow: var(--shadow-sm);
}
.feat .fi svg { width: 20px; height: 20px; }
.feat b { display: block; font-size: 14.5px; color: var(--ink); }
.feat span { font-size: 12.5px; color: var(--gray-mid); }

/* 软件界面 / 3D 场景占位 */
.pm-visual { position: relative; }
.mock-window {
  background: #fff; border: 1px solid var(--gray-line); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg); overflow: hidden;
}
.mock-bar { display: flex; align-items: center; gap: 6px; padding: 12px 16px; background: var(--gray-bg); border-bottom: 1px solid var(--gray-line); }
.mock-bar i { width: 11px; height: 11px; border-radius: 50%; display: block; }
.mock-bar i:nth-child(1) { background: #ff5f57; }
.mock-bar i:nth-child(2) { background: #febc2e; }
.mock-bar i:nth-child(3) { background: #28c840; }
.mock-bar .title { margin-left: 10px; font-size: 12.5px; color: var(--gray-deep); letter-spacing: 1px; }

/* ==========================================================================
   产教融合板块
   ========================================================================== */
.edu-intro { text-align: center; max-width: 760px; margin: 0 auto 54px; }
.edu-intro p { color: var(--gray-deep); font-size: 15px; }

.edu-block { padding: 64px 0; }
.edu-block + .edu-block { border-top: 1px solid var(--gray-line); }
.edu-block-head { display: flex; align-items: center; gap: 18px; margin-bottom: 30px; }
.edu-block-head .no {
  width: 46px; height: 46px; border-radius: 10px; flex: none; color: #fff; font-weight: 700; font-size: 20px;
  background: linear-gradient(135deg, var(--brand-bright), var(--brand-deep));
  display: flex; align-items: center; justify-content: center; box-shadow: 0 6px 16px var(--brand-glow);
}
.edu-block-head h3 { font-size: 24px; font-weight: 700; letter-spacing: 1px; }
.edu-block-head p { color: var(--gray-deep); font-size: 14px; }

/* 图文卡片 */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.edu-card {
  background: #fff; border: 1px solid var(--gray-line); border-radius: var(--radius-lg);
  overflow: hidden; transition: var(--transition); box-shadow: var(--shadow-sm);
}
.edu-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: var(--brand-sky); }
.edu-card .thumb { aspect-ratio: 16 / 10; background: var(--gray-card); display: flex; align-items: center; justify-content: center; overflow: hidden; }
.edu-card .thumb svg { width: 100%; height: 100%; }
.edu-card .body { padding: 22px 22px 24px; }
.edu-card .body h4 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.edu-card .body p { font-size: 13.5px; color: var(--gray-deep); }

/* 产品服务价值图文卡 */
.value-card {
  display: grid; grid-template-columns: 1fr 1.15fr; background: #fff; border: 1px solid var(--gray-line);
  border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-md); margin-bottom: 8px;
}
.value-card .thumb { background: linear-gradient(135deg, #eaf3fb, #eef2f6); display: flex; align-items: center; justify-content: center; min-height: 260px; }
.value-card .thumb svg { width: 100%; height: 100%; }
.value-card .thumb img { width: 100%; height: 100%; object-fit: contain; }
/* 堆叠布局：图片区全宽，用于宽幅总览图完整展示 */
.value-card--stack { grid-template-columns: 1fr; }
.value-card--stack .thumb { min-height: 0; padding: 26px 26px 6px; background: #fff; }
.value-card--stack .thumb img { width: 100%; height: auto; object-fit: contain; }
.value-card--stack .body { padding: 18px 34px 34px; }
.value-card .body { padding: 34px 38px; }
.value-card .body .v-tag { display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: 1px; color: var(--brand); background: var(--brand-tint); padding: 4px 12px; border-radius: 20px; }
.value-card .body h4 { font-size: 20px; font-weight: 700; margin: 14px 0 10px; }
.value-card .body > p { font-size: 14px; color: var(--gray-deep); }
.value-card .body ul { margin-top: 18px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.value-card .body ul li { display: flex; gap: 8px; align-items: flex-start; font-size: 13.5px; color: var(--ink-soft); }
.value-card .body ul li::before { content: "✓"; color: var(--brand-bright); font-weight: 700; flex: none; }
@media (max-width: 768px) { .value-card { grid-template-columns: 1fr; } .value-card .body ul { grid-template-columns: 1fr; } }

/* 案例展示区 */
.case-section { margin-top: 26px; }
.case-title { display: flex; align-items: center; gap: 10px; margin-bottom: 18px; }
.case-title .bar { width: 4px; height: 18px; background: var(--brand); border-radius: 2px; }
.case-title h5 { font-size: 16px; font-weight: 700; letter-spacing: 1px; }
.case-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; grid-auto-rows: minmax(220px, auto); }
.case-card {
  display: grid; grid-template-columns: 1.1fr 1fr; background: #fff; border: 1px solid var(--gray-line);
  border-radius: var(--radius-lg); overflow: hidden; transition: var(--transition); box-shadow: var(--shadow-sm);
}
.case-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: var(--brand-sky); }
.case-card .img { background: var(--gray-card); display: flex; align-items: center; justify-content: center; min-height: 180px; height: 220px; }
.case-card .img svg { width: 100%; height: 100%; }
.case-card .info { padding: 22px; }
.case-card .info .ct { font-size: 11px; font-weight: 700; letter-spacing: 1px; color: var(--brand-bright); }
.case-card .info h6 { font-size: 16px; font-weight: 700; margin: 8px 0; }
.case-card .info p { font-size: 13px; color: var(--gray-deep); }

/* ==========================================================================
   联系我们
   ========================================================================== */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; align-items: center; }

.contact-cards { display: grid; gap: 18px; }
.contact-card {
  display: flex; gap: 16px; background: #fff; border: 1px solid var(--gray-line);
  border-radius: var(--radius-lg); padding: 22px 24px; transition: var(--transition); box-shadow: var(--shadow-sm);
}
.contact-card:hover { border-color: var(--brand-sky); box-shadow: var(--shadow-md); }
.contact-card .ic { width: 48px; height: 48px; border-radius: 11px; flex: none; background: var(--brand-tint); display: flex; align-items: center; justify-content: center; }
.contact-card .ic svg { width: 24px; height: 24px; }
.contact-card b { display: block; font-size: 15px; color: var(--ink); margin-bottom: 3px; }
.contact-card p { font-size: 13.5px; color: var(--gray-deep); line-height: 1.6; }
.contact-card .hl { color: var(--brand); font-weight: 600; }

/* 表单 */
.form-card { background: #fff; border: 1px solid var(--gray-line); border-radius: var(--radius-lg); padding: 34px 36px; box-shadow: var(--shadow-md); }
.form-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 6px; }
.form-card > p { font-size: 13.5px; color: var(--gray-mid); margin-bottom: 26px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 13.5px; font-weight: 600; color: var(--ink-soft); margin-bottom: 8px; }
.form-group label em { color: #e5484d; font-style: normal; margin-left: 2px; }
.form-group input, .form-group textarea {
  width: 100%; border: 1px solid var(--gray-line); border-radius: 8px; padding: 12px 14px;
  font-size: 14px; font-family: inherit; color: var(--ink); background: var(--gray-bg);
  transition: var(--transition); outline: none;
}
.form-group input:focus, .form-group textarea:focus { border-color: var(--brand); background: #fff; box-shadow: 0 0 0 3px var(--brand-glow); }
.form-group textarea { resize: vertical; min-height: 130px; }
.form-note { font-size: 12.5px; color: var(--gray-mid); margin-top: 4px; }
.form-submit { width: 100%; margin-top: 6px; }
.form-success {
  display: none; margin-top: 14px; padding: 12px 16px; border-radius: 8px;
  background: #e9f9ee; border: 1px solid #b7e6c4; color: #1a7f37; font-size: 14px; text-align: center;
}
.form-error {
  display: none; margin-top: 14px; padding: 12px 16px; border-radius: 8px;
  background: #fdecec; border: 1px solid #f0c1c1; color: #c0392b; font-size: 14px; text-align: center;
}
.form-submit[disabled] { opacity: .6; cursor: not-allowed; }

/* ==========================================================================
   滚动进场动效
   ========================================================================== */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ==========================================================================
   图片轮播
   ========================================================================== */
.carousel { position: relative; overflow: hidden; }
.carousel-track { display: flex; transition: transform .5s cubic-bezier(.4,0,.2,1); }
.carousel-track img { width: 100%; flex-shrink: 0; display: block; object-fit: cover; }
.carousel-dots { position: absolute; bottom: 14px; left: 50%; transform: translateX(-50%); display: flex; gap: 8px; }
.carousel-dots .dot {
  width: 9px; height: 9px; border-radius: 50%; border: 0; background: rgba(255,255,255,.55);
  cursor: pointer; transition: var(--transition); padding: 0;
}
.carousel-dots .dot.active { background: #fff; transform: scale(1.25); }

/* 案例卡内轮播：完整展示图片，与原SVG占位尺寸(400x220)一致 */
.case-card .img .carousel { width: 100%; height: 220px; }
.case-card .img .carousel-track { height: 100%; }
.case-card .img .carousel-track img { height: 100%; width: 100%; object-fit: contain; }
.case-card .img .carousel, .case-card .img .carousel .carousel-track { min-height: 0; }

/* 价值卡缩略区轮播：完整展示图片 */
.value-card .thumb .carousel { width: 100%; height: 100%; min-height: 260px; }
.value-card .thumb .carousel-track { height: 100%; }
.value-card .thumb .carousel-track img { width: 100%; height: 100%; object-fit: contain; }

/* ==========================================================================
   回到顶部
   ========================================================================== */
.to-top {
  position: fixed; right: 28px; bottom: 28px; width: 46px; height: 46px; border-radius: 10px;
  background: var(--brand); color: #fff; border: 0; box-shadow: var(--shadow-md);
  display: flex; align-items: center; justify-content: center; opacity: 0; visibility: hidden;
  transform: translateY(10px); transition: var(--transition); z-index: 200;
}
.to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { background: var(--brand-deep); }

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1024px) {
  .biz-grid, .logo-grid { grid-template-columns: repeat(3, 1fr); }
  .logo-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-main { grid-template-columns: 1fr 1fr; }  .product-module { grid-template-columns: 1fr; gap: 34px; }
  .case-card { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .main-nav {
    position: absolute; top: 74px; left: 0; right: 0; flex-direction: column;
    background: #fff; border-bottom: 1px solid var(--gray-line); padding: 12px 0;
    display: none; box-shadow: var(--shadow-md);
  }
  .main-nav.open { display: flex; }
  .main-nav a { width: 100%; text-align: center; }
  .nav-cta { display: none; }

  .hero { padding: 70px 0 80px; }
  .hero h1 { font-size: 32px; }
  .hero-stats { gap: 30px; flex-wrap: wrap; }
  .intro-grid { grid-template-columns: 1fr; gap: 36px; }
  .biz-grid { grid-template-columns: 1fr; }
  .logo-grid { grid-template-columns: repeat(2, 1fr); }
  .card-grid { grid-template-columns: 1fr; }
  .feat-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .sec-head h2 { font-size: 26px; }
  .page-hero h1 { font-size: 28px; }
}