/* 成都华智道科技有限公司官网 - 全局样式（科技蓝专业风） */
:root {
  --blue-900: #06266f;
  --blue-700: #0b3fb5;
  --blue-600: #0052d9;
  --blue-500: #2b7fff;
  --blue-100: #e8f1ff;
  --blue-50: #f4f8ff;
  --ink-900: #111a2b;
  --ink-600: #3d4a5f;
  --ink-400: #6b7889;
  --line: #e3e9f2;
  --bg: #ffffff;
  --bg-soft: #f7f9fc;
  --radius: 14px;
  --shadow: 0 6px 24px rgba(6, 38, 111, .08);
  --shadow-lg: 0 12px 40px rgba(6, 38, 111, .14);
  --font: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { font-family: var(--font); color: var(--ink-900); background: var(--bg); line-height: 1.7; font-size: 16px; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--blue-600); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 3px solid var(--blue-500); outline-offset: 2px; border-radius: 4px; }

.container { width: min(1160px, 92%); margin: 0 auto; }

/* ===== 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(--line); }
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--ink-900); }
.logo:hover { text-decoration: none; }
.logo-mark { width: 36px; height: 36px; flex: 0 0 36px; }
.logo small { display: block; font-size: 11px; font-weight: 500; color: var(--ink-400); letter-spacing: .5px; }
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a { padding: 8px 14px; border-radius: 8px; color: var(--ink-600); font-size: 15px; }
.main-nav a:hover, .main-nav a[aria-current="page"] { color: var(--blue-600); background: var(--blue-50); text-decoration: none; }
.lang-switch { margin-left: 12px; padding: 6px 12px; border: 1px solid var(--line); border-radius: 20px; font-size: 13px; color: var(--ink-600); }
.nav-toggle { display: none; background: none; border: 1px solid var(--line); border-radius: 8px; padding: 8px 12px; font-size: 18px; cursor: pointer; color: var(--ink-900); }

/* ===== Hero ===== */
.hero { background: linear-gradient(135deg, var(--blue-900) 0%, var(--blue-600) 55%, var(--blue-500) 100%); color: #fff; padding: 88px 0 96px; position: relative; overflow: hidden; }
.hero::after { content: ""; position: absolute; right: -120px; top: -120px; width: 420px; height: 420px; border-radius: 50%; background: rgba(255, 255, 255, .07); }
.hero::before { content: ""; position: absolute; right: 120px; bottom: -180px; width: 300px; height: 300px; border-radius: 50%; background: rgba(255, 255, 255, .05); }
.hero-inner { position: relative; z-index: 1; max-width: 780px; }
.hero .badge { display: inline-block; background: rgba(255, 255, 255, .16); border: 1px solid rgba(255, 255, 255, .35); padding: 6px 16px; border-radius: 30px; font-size: 13px; margin-bottom: 22px; }
.hero h1 { font-size: clamp(30px, 4.5vw, 46px); line-height: 1.25; font-weight: 700; }
.hero p { margin-top: 18px; font-size: clamp(15px, 1.6vw, 18px); color: rgba(255, 255, 255, .88); max-width: 640px; }
.hero-actions { margin-top: 34px; display: flex; gap: 14px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 12px 28px; border-radius: 10px; font-size: 15px; font-weight: 600; border: 2px solid transparent; transition: transform .15s ease, box-shadow .15s ease; }
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn-primary { background: #fff; color: var(--blue-700); }
.btn-primary:hover { box-shadow: var(--shadow-lg); }
.btn-ghost { border-color: rgba(255, 255, 255, .6); color: #fff; }
.btn-blue { background: var(--blue-600); color: #fff; }
.btn-blue:hover { box-shadow: var(--shadow); }

/* 页面内 hero（子页） */
.page-hero { background: linear-gradient(120deg, var(--blue-900), var(--blue-600)); color: #fff; padding: 56px 0 52px; }
.page-hero h1 { font-size: clamp(26px, 3.6vw, 36px); }
.page-hero p { margin-top: 12px; color: rgba(255, 255, 255, .85); max-width: 720px; }
.breadcrumb { font-size: 13px; color: rgba(255, 255, 255, .7); margin-bottom: 14px; }
.breadcrumb a { color: rgba(255, 255, 255, .85); }

/* ===== 通用区块 ===== */
.section { padding: 72px 0; }
.section.soft { background: var(--bg-soft); }
.section-head { max-width: 720px; margin-bottom: 44px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head .eyebrow { color: var(--blue-600); font-weight: 700; font-size: 14px; letter-spacing: 2px; text-transform: uppercase; }
.section-head h2 { font-size: clamp(24px, 3vw, 32px); margin-top: 8px; line-height: 1.3; }
.section-head p { margin-top: 12px; color: var(--ink-600); }

.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); transition: transform .15s ease, box-shadow .15s ease; }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.card .icon { width: 46px; height: 46px; border-radius: 10px; background: var(--blue-100); display: flex; align-items: center; justify-content: center; margin-bottom: 16px; font-size: 22px; }
.card h3 { font-size: 18px; margin-bottom: 10px; }
.card p { font-size: 14.5px; color: var(--ink-600); }
.card ul { margin-top: 10px; padding-left: 0; list-style: none; }
.card ul li { font-size: 14px; color: var(--ink-600); padding: 5px 0 5px 22px; position: relative; }
.card ul li::before { content: "✓"; position: absolute; left: 0; color: var(--blue-600); font-weight: 700; }

/* 步骤/流程 */
.steps { counter-reset: step; display: grid; gap: 22px; grid-template-columns: repeat(4, 1fr); }
.step { position: relative; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 22px; }
.step::before { counter-increment: step; content: counter(step, decimal-leading-zero); font-size: 30px; font-weight: 800; color: var(--blue-100); -webkit-text-stroke: 1px var(--blue-500); }
.step h3 { font-size: 16px; margin: 8px 0 6px; }
.step p { font-size: 13.5px; color: var(--ink-600); }

/* 数据条 */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; text-align: center; }
.stat .num { font-size: clamp(30px, 4vw, 42px); font-weight: 800; color: var(--blue-600); }
.stat .label { font-size: 14px; color: var(--ink-600); margin-top: 4px; }

/* FAQ */
.faq-item { border: 1px solid var(--line); border-radius: 12px; background: #fff; margin-bottom: 14px; overflow: hidden; }
.faq-item summary { cursor: pointer; padding: 16px 20px; font-weight: 600; font-size: 15.5px; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 20px; color: var(--blue-600); font-weight: 700; }
.faq-item[open] summary::after { content: "−"; }
.faq-item .faq-body { padding: 0 20px 18px; color: var(--ink-600); font-size: 14.5px; }

/* CTA 横幅 */
.cta-banner { background: linear-gradient(120deg, var(--blue-700), var(--blue-500)); border-radius: 18px; color: #fff; padding: 48px 40px; display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.cta-banner h2 { font-size: clamp(20px, 2.6vw, 28px); }
.cta-banner p { margin-top: 8px; color: rgba(255, 255, 255, .85); }

/* 联系页 */
.contact-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 30px; }
.contact-form label { display: block; font-size: 14px; font-weight: 600; margin: 14px 0 6px; }
.contact-form input, .contact-form textarea, .contact-form select { width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: 10px; font-family: var(--font); font-size: 15px; background: #fff; }
.contact-form input:focus, .contact-form textarea:focus, .contact-form select:focus { border-color: var(--blue-500); outline: none; box-shadow: 0 0 0 3px var(--blue-100); }
.info-list { list-style: none; }
.info-list li { display: flex; gap: 14px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.info-list .icon { flex: 0 0 44px; width: 44px; height: 44px; border-radius: 10px; background: var(--blue-100); display: flex; align-items: center; justify-content: center; font-size: 20px; }
.info-list strong { display: block; font-size: 15px; }
.info-list span { font-size: 14px; color: var(--ink-600); }

/* 表格 */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
table { width: 100%; border-collapse: collapse; font-size: 14.5px; min-width: 560px; }
th, td { text-align: left; padding: 13px 18px; border-bottom: 1px solid var(--line); }
th { background: var(--blue-50); color: var(--blue-900); font-weight: 700; }
tr:last-child td { border-bottom: none; }

/* ===== 页脚 ===== */
.site-footer { background: var(--ink-900); color: #aab4c4; padding: 56px 0 28px; font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 34px; }
.site-footer h4 { color: #fff; font-size: 15px; margin-bottom: 14px; }
.site-footer a { color: #aab4c4; display: inline-block; padding: 4px 0; }
.site-footer a:hover { color: #fff; }
.site-footer .logo { color: #fff; margin-bottom: 14px; }
.footer-note { color: var(--ink-600); }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .12); margin-top: 40px; padding-top: 22px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 13px; color: #7e8a9c; }

/* ===== 响应式 ===== */
@media (max-width: 960px) {
  .grid-3, .grid-4, .steps, .stats { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 680px) {
  .grid-2, .grid-3, .grid-4, .steps, .stats { grid-template-columns: 1fr; }
  .nav-toggle { display: block; }
  .main-nav { display: none; position: absolute; top: 68px; left: 0; right: 0; background: #fff; flex-direction: column; align-items: stretch; padding: 12px 4%; border-bottom: 1px solid var(--line); box-shadow: var(--shadow-lg); }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 8px; }
  .lang-switch { margin: 8px 0 4px; text-align: center; }
  .hero { padding: 56px 0 64px; }
  .section { padding: 52px 0; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-banner { padding: 34px 24px; }
}