/* ============================================================
   澄泓GEO 品牌官网 全站样式（浅色主题）
   设计规范：白底浅灰分区 + 应用内同源主色（绿 #18A058 / 蓝 #2080F0）
   ============================================================ */
:root {
  color-scheme: light;
  --bg: #ffffff;
  --bg-soft: #f6f8fb;
  --bg-card: #ffffff;
  --border: #e6eaf1;
  --text: #18243a;
  --text-dim: #5c6b80;
  --green: #18a058;
  --green-bright: #0e9f5a;
  --green-deep: #0c8a4d;
  --blue: #2080f0;
  --blue-deep: #1d6fd1;
  --cyan: #0891b2;
  --gradient: linear-gradient(135deg, #0e9f5a 0%, #0891b2 100%);
  --radius: 12px;
  --max-w: 1440px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand .logo-icon {
  width: 34px; height: 34px; border-radius: 8px;
  background: var(--gradient); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 15px;
}
.brand .brand-name { font-size: 18px; font-weight: 700; letter-spacing: .5px; }
.nav-links { display: flex; align-items: center; gap: 4px; list-style: none; }
.nav-links a {
  padding: 8px 14px; border-radius: 8px; font-size: 15px; color: var(--text-dim);
  transition: color .2s, background .2s;
}
.nav-links a:hover { color: var(--text); background: rgba(24, 36, 58, .06); }
.nav-links a.active { color: var(--green-bright); font-weight: 600; }
.nav-actions { display: flex; align-items: center; gap: 12px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 22px; border-radius: 10px; font-size: 15px; font-weight: 600;
  border: 1px solid transparent; cursor: pointer; transition: all .2s;
}
.btn-primary { background: var(--green); color: #fff; }
.btn-primary:hover { background: var(--green-deep); transform: translateY(-1px); }
.btn-ghost { border-color: #d9e0ea; color: var(--text); background: #fff; }
.btn-ghost:hover { border-color: #b9c4d4; background: rgba(24, 36, 58, .04); }
.btn-lg { padding: 14px 32px; font-size: 16px; border-radius: 12px; }

.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--text); margin: 5px 0; transition: .3s; }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; padding: 96px 0 80px; }
.hero-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center; opacity: .22;
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,.25) 0%, var(--bg) 88%);
}
.hero-inner { position: relative; z-index: 1; text-align: center; max-width: 820px; margin: 0 auto; }
.hero-badge {
  display: inline-block; padding: 6px 16px; border-radius: 999px;
  border: 1px solid rgba(24,160,88,.28); background: rgba(24,160,88,.08);
  color: var(--green-deep); font-size: 14px; margin-bottom: 24px; font-weight: 600;
}
.hero h1 { font-size: 46px; line-height: 1.25; font-weight: 800; letter-spacing: 1px; }
.hero h1 .grad {
  background: var(--gradient); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p.lead { margin: 20px auto 36px; font-size: 18px; color: var(--text-dim); max-width: 640px; }
.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ---------- 区块通用 ---------- */
.section { padding: 80px 0; }
.section.alt { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 760px; margin: 0 auto 56px; }
.section-head .kicker {
  color: var(--green-bright); font-size: 14px; font-weight: 700;
  letter-spacing: 3px; text-transform: uppercase;
}
.section-head h2 { font-size: 34px; margin: 10px 0 14px; font-weight: 700; }
.section-head p { color: var(--text-dim); font-size: 16px; }

.grid { display: grid; gap: 24px; }
.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: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px;
  transition: transform .25s, border-color .25s, box-shadow .25s;
}
.card:hover { transform: translateY(-4px); border-color: rgba(24,160,88,.45); box-shadow: 0 12px 32px rgba(24,160,88,.08); }
.card .icon {
  width: 46px; height: 46px; border-radius: 10px; font-size: 22px;
  background: rgba(24,160,88,.1); color: var(--green-deep);
  display: flex; align-items: center; justify-content: center; margin-bottom: 18px;
}
.card h3 { font-size: 18px; margin-bottom: 10px; }
.card p { color: var(--text-dim); font-size: 14.5px; }
.card img { border-radius: 8px; margin-bottom: 18px; aspect-ratio: 4/3; object-fit: cover; width: 100%; }

/* ---------- 数字带 ---------- */
.stats-band { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat .num { font-size: 34px; font-weight: 800; background: var(--gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stat .label { color: var(--text-dim); font-size: 14px; margin-top: 4px; }

/* ---------- 步骤 ---------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; counter-reset: step; }
.step { position: relative; padding: 28px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); }
.step .step-no {
  width: 40px; height: 40px; border-radius: 50%; background: var(--gradient); color: #fff;
  font-weight: 800; display: flex; align-items: center; justify-content: center; margin-bottom: 16px;
}

/* ---------- 双引擎 ---------- */
.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.duo .card h3 span { font-size: 13px; font-weight: 600; padding: 3px 10px; border-radius: 999px; margin-left: 8px; vertical-align: middle; }
.tag-seo { background: rgba(32,128,240,.1); color: var(--blue-deep); }
.tag-geo { background: rgba(24,160,88,.1); color: var(--green-deep); }
.duo ul { list-style: none; margin-top: 12px; }
.duo li { color: var(--text-dim); font-size: 14.5px; padding: 6px 0 6px 22px; position: relative; }
.duo li::before { content: "✓"; position: absolute; left: 0; color: var(--green-bright); font-weight: 700; }

/* ---------- 平台覆盖 ---------- */
.plat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.plat-col { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.plat-col h3 { font-size: 15.5px; margin-bottom: 14px; display: flex; align-items: center; gap: 8px; }
.plat-col h3 .em { font-size: 18px; }
.plat-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.plat-chip {
  display: inline-flex; align-items: center; padding: 5px 12px; border-radius: 999px;
  background: var(--bg-soft); border: 1px solid var(--border);
  font-size: 13px; color: var(--text-dim); font-weight: 500;
}
.plat-note { text-align: center; color: var(--text-dim); font-size: 13px; margin-top: 20px; }

/* ---------- 对比表 / 通用表格 ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg-card); }
.compare { width: 100%; border-collapse: collapse; font-size: 14.5px; min-width: 680px; }
.compare th, .compare td { padding: 14px 18px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.compare thead th { background: var(--bg-soft); font-size: 14px; font-weight: 700; }
.compare thead th.hl { color: var(--green-deep); }
.compare tbody th { background: var(--bg-soft); font-weight: 600; white-space: nowrap; font-size: 13.5px; }
.compare td.hl { background: rgba(24,160,88,.05); font-weight: 600; }
.compare .good { color: var(--green-deep); font-weight: 700; }
.compare .bad { color: #b3564d; }
.compare .mid { color: var(--text-dim); }
.compare tbody tr:last-child td, .compare tbody tr:last-child th { border-bottom: none; }

/* ---------- 价格 ---------- */
.pricing-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; align-items: stretch; }
.price-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px 24px; display: flex; flex-direction: column; position: relative;
}
.price-card.featured { border-color: var(--green); box-shadow: 0 0 0 1px var(--green), 0 16px 40px rgba(24,160,88,.12); }
.price-card .plan-badge {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--gradient); color: #fff; font-size: 12px; font-weight: 700;
  padding: 3px 14px; border-radius: 999px; white-space: nowrap;
}
.price-card h3 { font-size: 17px; }
.price-card .price { margin: 14px 0 4px; }
.price-card .price .amount { font-size: 34px; font-weight: 800; }
.price-card .price .unit { color: var(--text-dim); font-size: 13px; }
.price-card .yearly { color: var(--text-dim); font-size: 13px; min-height: 20px; }
.price-card ul { list-style: none; margin: 18px 0 24px; flex: 1; }
.price-card li { color: var(--text-dim); font-size: 14px; padding: 5px 0 5px 22px; position: relative; }
.price-card li::before { content: "✓"; position: absolute; left: 0; color: var(--green-bright); font-weight: 700; }
.price-note { text-align: center; color: var(--text-dim); font-size: 13.5px; margin-top: 28px; }
.price-note a { color: var(--green-deep); font-weight: 600; }

/* ---------- FAQ ---------- */
.faq {
  max-width: 1100px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 1fr; gap: 14px; align-items: start;
}
.faq details { background: var(--bg-card); border: 1px solid var(--border); border-radius: 10px; }
.faq summary { cursor: pointer; padding: 18px 22px; font-weight: 600; font-size: 15.5px; list-style: none; }
.faq summary::before { content: "＋ "; color: var(--green-bright); }
.faq details[open] summary::before { content: "－ "; }
.faq details p { padding: 0 22px 18px 22px; color: var(--text-dim); font-size: 14.5px; }

/* ---------- 英雄区轮播 ---------- */
.hero-slides { display: grid; }
.hero-slide {
  grid-area: 1 / 1; opacity: 0; transition: opacity .7s ease;
  pointer-events: none; visibility: hidden;
}
.hero-slide.active { opacity: 1; pointer-events: auto; visibility: visible; }
.hero-dots {
  position: relative; z-index: 1; display: flex; justify-content: center;
  gap: 10px; margin-top: 36px;
}
.hero-dots button {
  width: 10px; height: 10px; border-radius: 6px; border: none;
  background: rgba(24,160,88,.25); cursor: pointer; padding: 0;
  transition: all .3s ease;
}
.hero-dots button.active { background: var(--green-bright); width: 28px; }

/* ---------- 图文分栏 ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.split img { border-radius: var(--radius); border: 1px solid var(--border); aspect-ratio: 4/3; object-fit: cover; }
.split h2 { font-size: 28px; margin-bottom: 14px; }
.split p { color: var(--text-dim); font-size: 15.5px; margin-bottom: 12px; }
.split p strong { color: var(--text); }

/* ---------- CTA 带 ---------- */
.cta-band {
  text-align: center; padding: 72px 24px; border-radius: 16px;
  background: linear-gradient(135deg, rgba(24,160,88,.08), rgba(8,145,178,.06));
  border: 1px solid var(--border);
}
.cta-band h2 { font-size: 30px; margin-bottom: 12px; }
.cta-band p { color: var(--text-dim); margin-bottom: 28px; }

/* ---------- 页脚 ---------- */
.site-footer { border-top: 1px solid var(--border); background: var(--bg-soft); padding: 56px 0 28px; margin-top: 80px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
.site-footer h4 { font-size: 15px; margin-bottom: 14px; color: var(--text); }
.site-footer ul { list-style: none; }
.site-footer li { margin-bottom: 9px; }
.site-footer a { color: var(--text-dim); font-size: 14px; }
.site-footer a:hover { color: var(--green-deep); }
.footer-desc { color: var(--text-dim); font-size: 14px; max-width: 320px; margin-top: 12px; }
.footer-bottom {
  margin-top: 44px; padding-top: 22px; border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
  color: #8593a8; font-size: 13px;
}

/* ---------- 备案信息行 ---------- */
.filing {
  margin-top: 44px; padding-top: 22px; border-top: 1px solid var(--border);
  display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 22px;
  font-size: 13px; color: #8593a8;
}
.filing a { color: #8593a8; display: inline-flex; align-items: center; gap: 5px; }
.filing a:hover { color: var(--green-deep); }
.filing svg { flex-shrink: 0; }
.footer-bottom { margin-top: 14px; padding-top: 0; border-top: none; justify-content: center; text-align: center; }

/* ---------- 表单 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 40px; }
.contact-item { display: flex; gap: 14px; margin-bottom: 22px; }
.contact-item .icon { width: 42px; height: 42px; border-radius: 10px; background: rgba(24,160,88,.1); color: var(--green-deep); display: flex; align-items: center; justify-content: center; font-size: 19px; flex-shrink: 0; }
.contact-item .label { color: var(--text-dim); font-size: 13px; }
.contact-item .value { font-size: 15.5px; font-weight: 600; }

/* ---------- 页面小标题 ---------- */
.page-hero { padding: 64px 0 48px; text-align: center; background: var(--bg-soft); border-bottom: 1px solid var(--border); }
.page-hero h1 { font-size: 38px; font-weight: 800; }
.page-hero p { color: var(--text-dim); max-width: 620px; margin: 14px auto 0; }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .faq { grid-template-columns: 1fr; }
  .grid-3, .grid-4, .steps, .pricing-grid, .stats-band, .plat-grid { grid-template-columns: repeat(2, 1fr); }
  .duo, .split, .contact-grid { grid-template-columns: 1fr; gap: 28px; }
  .hero h1 { font-size: 34px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-links, .nav-actions .btn-ghost { display: none; }
  .nav-toggle { display: block; }
  .nav-links.open {
    display: flex; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0;
    background: var(--bg-soft); border-bottom: 1px solid var(--border); padding: 12px 24px 20px;
  }
  .nav-links.open a { display: block; padding: 12px 0; font-size: 16px; }
}
@media (max-width: 560px) {
  .grid-2, .grid-3, .grid-4, .steps, .pricing-grid, .stats-band, .plat-grid, .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 56px 0; }
  .hero { padding: 64px 0 56px; }
  .hero h1 { font-size: 28px; }
  .page-hero h1 { font-size: 28px; }
}