/* ============================================
   嗯多客收银系统 - 产品官网
   纯静态 · 响应式 · 无外部依赖
   ============================================ */

:root {
  --green-900: #064e3b;
  --green-800: #065f46;
  --green-700: #047857;
  --green-600: #059669;
  --green-500: #10b981;
  --green-100: #d1fae5;
  --green-50: #ecfdf5;
  --orange-500: #f59e0b;
  --ink-900: #0f172a;
  --ink-700: #334155;
  --ink-500: #64748b;
  --ink-300: #cbd5e1;
  --bg-soft: #f8fafc;
  --white: #ffffff;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, .08);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, .10);
  --shadow-lg: 0 20px 50px rgba(6, 78, 59, .22);
  --radius: 14px;
  --maxw: 1120px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Noto Sans SC", "Source Han Sans SC", -apple-system, "Segoe UI", sans-serif;
  color: var(--ink-900);
  background: var(--white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

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

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(15, 23, 42, .06);
}
.site-header.scrolled { box-shadow: var(--shadow-sm); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--ink-900); }
.brand svg { display: block; }
.brand small { display: block; font-size: 11px; font-weight: 400; color: var(--ink-500); line-height: 1.2; }
.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
  padding: 8px 16px; border-radius: 999px; font-size: 15px;
  color: var(--ink-700); transition: all .2s;
}
.nav-links a:hover { color: var(--green-700); background: var(--green-50); }
.nav-links a.active { color: var(--green-700); background: var(--green-100); font-weight: 600; }
.nav-cta { margin-left: 14px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 22px; border-radius: 999px;
  font-size: 15px; font-weight: 600; line-height: 1.4;
  border: none; cursor: pointer; transition: all .2s;
}
.btn-primary { background: var(--green-600); color: #fff; box-shadow: 0 4px 14px rgba(5, 150, 105, .35); }
.btn-primary:hover { background: var(--green-700); transform: translateY(-1px); box-shadow: 0 8px 20px rgba(5, 150, 105, .4); }
.btn-outline { background: transparent; color: var(--green-700); border: 1.5px solid var(--green-600); }
.btn-outline:hover { background: var(--green-50); }
.btn-white { background: #fff; color: var(--green-800); box-shadow: 0 6px 18px rgba(0, 0, 0, .18); }
.btn-white:hover { transform: translateY(-1px); box-shadow: 0 10px 24px rgba(0, 0, 0, .22); }
.btn-lg { padding: 14px 30px; font-size: 16px; }

.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 6px; }

/* ---------- Hero ---------- */
.hero {
  background:
    radial-gradient(1000px 500px at 85% -10%, rgba(16, 185, 129, .35), transparent 60%),
    radial-gradient(700px 400px at -10% 110%, rgba(245, 158, 11, .18), transparent 60%),
    linear-gradient(160deg, #022c22 0%, #064e3b 55%, #065f46 100%);
  color: #fff;
  padding: 92px 0 0;
  overflow: hidden;
}
.hero-inner { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; padding-bottom: 84px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(16, 185, 129, .16); border: 1px solid rgba(16, 185, 129, .4);
  color: #a7f3d0; font-size: 13px; padding: 6px 14px; border-radius: 999px; margin-bottom: 22px;
}
.hero h1 { font-size: 46px; line-height: 1.22; font-weight: 800; letter-spacing: .5px; }
.hero h1 em { font-style: normal; color: #34d399; }
.hero .sub { margin: 20px 0 32px; font-size: 17px; color: #d1fae5; max-width: 520px; }
.hero-points { display: flex; flex-wrap: wrap; gap: 12px 24px; margin-top: 28px; font-size: 14px; color: #a7f3d0; }
.hero-points li { display: flex; align-items: center; gap: 8px; }
.hero-points svg { flex-shrink: 0; }

/* Hero 右侧：收银界面示意 */
.pos-mock {
  background: #f1f5f9; border-radius: 18px; padding: 18px;
  box-shadow: var(--shadow-lg); transform: perspective(1200px) rotateY(-8deg) rotateX(2deg);
  border: 1px solid rgba(255, 255, 255, .25);
}
.pos-mock .pos-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.pos-mock .pos-top span { font-size: 13px; color: var(--ink-500); }
.pos-tag { font-size: 11px; background: var(--green-100); color: var(--green-700); padding: 3px 10px; border-radius: 999px; font-weight: 600; }
.pos-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 14px; }
.pos-bill { background: #fff; border-radius: 12px; padding: 16px; }
.pos-bill h4 { font-size: 13px; color: var(--ink-700); margin-bottom: 10px; }
.pos-row { display: flex; justify-content: space-between; font-size: 13px; padding: 7px 0; border-bottom: 1px dashed var(--ink-300); color: var(--ink-700); }
.pos-row b { color: var(--ink-900); }
.pos-total { display: flex; justify-content: space-between; font-size: 15px; font-weight: 700; margin-top: 12px; color: var(--ink-900); }
.pos-total span:last-child { color: var(--green-600); font-size: 20px; }
.pos-keys { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; align-content: start; }
.pos-key {
  background: #fff; border-radius: 10px; padding: 12px 10px; text-align: center;
  font-size: 13px; color: var(--ink-700); border: 1px solid var(--ink-300);
}
.pos-key b { display: block; font-size: 12px; margin-bottom: 2px; color: var(--green-700); }
.pos-key.hot { background: var(--green-600); color: #fff; border-color: var(--green-600); }

/* ---------- 信任条 ---------- */
.trust-bar { background: var(--white); border-bottom: 1px solid rgba(15, 23, 42, .06); }
.trust-inner { display: flex; justify-content: space-between; gap: 20px; padding: 26px 0; flex-wrap: wrap; }
.trust-item { display: flex; align-items: center; gap: 12px; }
.trust-item .num { font-size: 26px; font-weight: 800; color: var(--green-700); line-height: 1.1; }
.trust-item .txt { font-size: 13px; color: var(--ink-500); line-height: 1.4; }

/* ---------- Section 通用 ---------- */
.section { padding: 88px 0; }
.section-alt { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 56px; }
.section-head .kicker { color: var(--green-600); font-size: 14px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; }
.section-head h2 { font-size: 34px; font-weight: 800; margin: 10px 0 14px; letter-spacing: .3px; }
.section-head p { color: var(--ink-500); font-size: 16px; }

/* ---------- 特性卡片 ---------- */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card {
  background: #fff; border-radius: var(--radius); padding: 30px 26px;
  border: 1px solid rgba(15, 23, 42, .07); box-shadow: var(--shadow-sm);
  transition: all .25s;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: rgba(16, 185, 129, .35); }
.feature-card .icon {
  width: 52px; height: 52px; border-radius: 14px; display: flex; align-items: center; justify-content: center;
  background: var(--green-50); margin-bottom: 18px;
}
.feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.feature-card p { font-size: 14.5px; color: var(--ink-500); }

/* ---------- 行业 ---------- */
.industry-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.industry-card {
  background: #fff; border-radius: var(--radius); padding: 26px 22px; text-align: center;
  border: 1px solid rgba(15, 23, 42, .07); transition: all .25s;
}
.industry-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.industry-card .emoji { font-size: 38px; line-height: 1.2; margin-bottom: 12px; }
.industry-card h3 { font-size: 16px; margin-bottom: 6px; }
.industry-card p { font-size: 13.5px; color: var(--ink-500); }

/* ---------- 下载 ---------- */
.download {
  background: linear-gradient(150deg, #064e3b, #047857);
  color: #fff; padding: 84px 0;
}
.download-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 48px; align-items: center; }
.download h2 { font-size: 32px; font-weight: 800; margin-bottom: 14px; }
.download .desc { color: #d1fae5; font-size: 15.5px; margin-bottom: 28px; max-width: 520px; }
.dl-card {
  background: rgba(255, 255, 255, .08); border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 16px; padding: 22px 24px; display: flex; align-items: center; gap: 18px;
  backdrop-filter: blur(6px);
}
.dl-card .win {
  width: 56px; height: 56px; border-radius: 14px; background: #fff;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.dl-card h4 { font-size: 17px; margin-bottom: 4px; }
.dl-card p { font-size: 13px; color: #a7f3d0; }
.dl-actions { margin-top: 22px; display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.dl-note { font-size: 12.5px; color: #a7f3d0; }
.dl-meta { margin-top: 22px; display: flex; flex-wrap: wrap; gap: 10px 28px; font-size: 13px; color: #d1fae5; }
.dl-meta b { color: #fff; }
.steps { display: grid; gap: 16px; }
.step { display: flex; gap: 14px; align-items: flex-start; }
.step .n {
  width: 30px; height: 30px; border-radius: 999px; background: rgba(255, 255, 255, .14);
  border: 1px solid rgba(255, 255, 255, .3); display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 14px; flex-shrink: 0;
}
.step b { display: block; font-size: 15px; }
.step p { font-size: 13.5px; color: #d1fae5; }

/* ---------- CTA ---------- */
.cta { background: var(--ink-900); color: #fff; padding: 72px 0; text-align: center; }
.cta h2 { font-size: 30px; font-weight: 800; margin-bottom: 12px; }
.cta p { color: #94a3b8; margin-bottom: 28px; }
.cta .btn-group { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

/* ---------- 页脚 ---------- */
.site-footer { background: #022c22; color: #a7f3d0; padding: 44px 0 0; font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; padding-bottom: 36px; }
.footer-grid h4 { color: #fff; font-size: 15px; margin-bottom: 14px; }
.footer-grid a { display: block; padding: 4px 0; color: #a7f3d0; transition: color .2s; }
.footer-grid a:hover { color: #fff; }
.footer-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.footer-brand span { color: #fff; font-weight: 700; font-size: 17px; }
.footer-grid .about-txt { color: #6ee7b7; font-size: 13.5px; max-width: 300px; line-height: 1.8; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .12);
  padding: 18px 0; text-align: center; font-size: 13px; color: #6ee7b7;
}
.footer-bottom a { color: #a7f3d0; text-decoration: underline; text-underline-offset: 3px; }
.footer-bottom a:hover { color: #fff; }

/* ---------- 内页 Hero ---------- */
.page-hero {
  background: linear-gradient(160deg, #022c22, #065f46);
  color: #fff; padding: 74px 0 64px;
}
.page-hero h1 { font-size: 38px; font-weight: 800; margin-bottom: 14px; }
.page-hero p { color: #d1fae5; font-size: 16.5px; max-width: 640px; }

/* ---------- 合作页 ---------- */
.mode-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.mode-card {
  background: #fff; border-radius: var(--radius); padding: 30px 28px;
  border: 1px solid rgba(15, 23, 42, .07); box-shadow: var(--shadow-sm);
  transition: all .25s;
}
.mode-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: rgba(16, 185, 129, .35); }
.mode-card .icon { width: 48px; height: 48px; border-radius: 12px; background: var(--green-50); display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.mode-card h3 { font-size: 18px; margin-bottom: 8px; }
.mode-card p { font-size: 14.5px; color: var(--ink-500); }
.mode-card .mode-tag { display: inline-block; font-size: 12px; color: var(--green-700); background: var(--green-100); border-radius: 999px; padding: 3px 12px; margin-bottom: 12px; font-weight: 600; }

.process { counter-reset: step; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.process-item { background: #fff; border-radius: var(--radius); padding: 26px 20px; text-align: center; border: 1px solid rgba(15, 23, 42, .07); position: relative; }
.process-item .n {
  width: 40px; height: 40px; margin: 0 auto 14px; border-radius: 999px;
  background: var(--green-600); color: #fff; font-weight: 800; font-size: 17px;
  display: flex; align-items: center; justify-content: center;
}
.process-item h3 { font-size: 16px; margin-bottom: 6px; }
.process-item p { font-size: 13.5px; color: var(--ink-500); }

.contact-card {
  background: #fff; border-radius: var(--radius); box-shadow: var(--shadow-md);
  border: 1px solid rgba(15, 23, 42, .07); padding: 34px 32px;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; text-align: center;
}
.contact-card h4 { font-size: 15px; color: var(--ink-700); margin-bottom: 6px; }
.contact-card p { font-size: 15px; font-weight: 600; color: var(--ink-900); }
.contact-card small { display: block; font-size: 12px; color: var(--ink-500); margin-top: 4px; }

/* ---------- 关于页 ---------- */
.story-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.story-txt h2 { font-size: 28px; font-weight: 800; margin-bottom: 18px; }
.story-txt p { color: var(--ink-500); font-size: 15.5px; margin-bottom: 16px; }
.story-card {
  background: #fff; border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow-md);
  border: 1px solid rgba(15, 23, 42, .07);
}
.story-card .big { font-size: 44px; font-weight: 800; color: var(--green-600); line-height: 1.1; }
.story-card .lbl { font-size: 13px; color: var(--ink-500); margin-top: 4px; }
.story-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 16px; }
.story-stat { background: var(--green-50); border-radius: 12px; padding: 14px 16px; }
.story-stat b { font-size: 22px; color: var(--green-700); display: block; }
.story-stat span { font-size: 12.5px; color: var(--ink-500); }

.timeline { max-width: 720px; margin: 0 auto; position: relative; padding-left: 34px; }
.timeline::before { content: ""; position: absolute; left: 9px; top: 6px; bottom: 6px; width: 2px; background: var(--green-100); }
.tl-item { position: relative; padding: 0 0 36px 0; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: ""; position: absolute; left: -31px; top: 6px; width: 14px; height: 14px;
  border-radius: 999px; background: var(--green-600); border: 3px solid var(--green-100);
}
.tl-item .year { font-size: 13px; font-weight: 700; color: var(--green-600); letter-spacing: 1px; }
.tl-item h3 { font-size: 17px; margin: 4px 0 6px; }
.tl-item p { font-size: 14.5px; color: var(--ink-500); }

.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.value-card { background: #fff; border-radius: var(--radius); padding: 28px 24px; border: 1px solid rgba(15, 23, 42, .07); box-shadow: var(--shadow-sm); text-align: center; }
.value-card .emoji { font-size: 34px; margin-bottom: 12px; }
.value-card h3 { font-size: 17px; margin-bottom: 8px; }
.value-card p { font-size: 14px; color: var(--ink-500); }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero h1 { font-size: 36px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .industry-grid { grid-template-columns: repeat(2, 1fr); }
  .download-grid { grid-template-columns: 1fr; }
  .mode-grid { grid-template-columns: 1fr; }
  .process { grid-template-columns: repeat(2, 1fr); }
  .contact-card { grid-template-columns: 1fr; }
  .story-grid { grid-template-columns: 1fr; }
  .value-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .pos-mock { transform: none; max-width: 480px; }
}

@media (max-width: 640px) {
  .nav-links {
    position: fixed; inset: 68px 0 auto 0; background: #fff; flex-direction: column;
    padding: 16px 24px 24px; gap: 4px; box-shadow: var(--shadow-md);
    transform: translateY(-120%); transition: transform .25s; border-radius: 0 0 16px 16px;
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links a { display: block; padding: 12px 14px; }
  .nav-cta { margin: 8px 0 0; width: 100%; }
  .nav-cta .btn { width: 100%; justify-content: center; }
  .nav-toggle { display: block; }
  .section { padding: 64px 0; }
  .section-head h2 { font-size: 26px; }
  .hero { padding-top: 64px; }
  .hero h1 { font-size: 30px; }
  .feature-grid, .industry-grid, .process, .value-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .trust-inner { justify-content: flex-start; }
}