/* 新趋势商贸 OPC 官方站 —— 全站样式
   品牌主色 #6B4FFF 取自「易我测评成长系统」小程序导航栏色，保证品牌一致。 */

:root {
  --brand: #6B4FFF;
  --brand-dark: #5238d6;
  --brand-soft: #f2f0ff;
  --ink: #1a1a2e;
  --ink-2: #4a4a63;
  --ink-3: #7a7a92;
  --bg: #ffffff;
  --bg-soft: #f7f7fb;
  --line: #e8e8f0;
  --ok: #1a9e5c;
  --warn-bg: #fff8e6;
  --warn-line: #f0d089;
  --radius: 14px;
  --maxw: 1080px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

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

/* ---------- Header ---------- */
.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(8px);
  position: sticky; top: 0; z-index: 20;
}
.site-header .wrap {
  display: flex; align-items: center; gap: 24px;
  height: 64px;
}
.brand {
  font-weight: 700; font-size: 17px; color: var(--ink);
  letter-spacing: .2px; white-space: nowrap;
}
.brand:hover { text-decoration: none; }
.brand .dot { color: var(--brand); }
.site-nav { display: flex; gap: 22px; margin-left: auto; font-size: 15px; }
.site-nav a { color: var(--ink-2); }
.site-nav a:hover { color: var(--brand); text-decoration: none; }
.lang-switch {
  font-size: 14px; color: var(--ink-3);
  border-left: 1px solid var(--line); padding-left: 18px; white-space: nowrap;
}
.lang-switch a { color: var(--ink-3); }
.lang-switch .on { color: var(--brand); font-weight: 600; }

/* ---------- Hero ---------- */
.hero { padding: 76px 0 60px; text-align: center; }
.hero .eyebrow {
  display: inline-block; font-size: 13px; letter-spacing: 2px;
  color: var(--brand); background: var(--brand-soft);
  padding: 5px 14px; border-radius: 999px; margin-bottom: 22px;
  text-transform: uppercase;
}
.hero h1 {
  font-size: clamp(30px, 5vw, 46px);
  line-height: 1.28; margin: 0 0 20px; font-weight: 800;
  letter-spacing: -.5px;
}
.hero p.lead {
  font-size: clamp(16px, 2.2vw, 19px); color: var(--ink-2);
  max-width: 680px; margin: 0 auto 32px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; padding: 12px 26px; border-radius: 10px;
  font-size: 15px; font-weight: 600; transition: all .15s ease;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); }
.btn-ghost { border: 1px solid var(--line); color: var(--ink-2); background: #fff; }
.btn-ghost:hover { border-color: var(--brand); color: var(--brand); }

/* ---------- Sections ---------- */
.section { padding: 60px 0; }
.section.soft { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section h2 {
  font-size: clamp(22px, 3.2vw, 30px); margin: 0 0 12px; font-weight: 750;
  letter-spacing: -.3px;
}
.section .sub { color: var(--ink-3); margin: 0 0 36px; font-size: 16px; }
.section.center { text-align: center; }

/* ---------- Product cards ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 22px; }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; display: flex; flex-direction: column;
  transition: box-shadow .18s ease, transform .18s ease, border-color .18s ease;
}
.card:hover {
  box-shadow: 0 10px 30px rgba(30,20,80,.09);
  transform: translateY(-2px); border-color: #d8d4f7;
}
.card .tag {
  align-self: flex-start; font-size: 12px; font-weight: 700;
  padding: 3px 10px; border-radius: 6px; margin-bottom: 14px;
  background: var(--brand-soft); color: var(--brand);
}
.card .tag.secondary { background: #eef7f1; color: var(--ok); }
.card h3 { margin: 0 0 6px; font-size: 20px; font-weight: 750; }
.card .meta { color: var(--ink-3); font-size: 13px; margin: 0 0 14px; }
.card p { color: var(--ink-2); margin: 0 0 18px; font-size: 15px; }
.card ul { margin: 0 0 20px; padding-left: 20px; color: var(--ink-2); font-size: 14.5px; }
.card ul li { margin-bottom: 5px; }
.card .cta { margin-top: auto; font-weight: 600; font-size: 15px; }
.card.muted { background: var(--bg-soft); }
.card.muted h3, .card.muted p { color: var(--ink-3); }

/* ---------- Facts / list ---------- */
.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 26px; }
.fact h4 { margin: 0 0 8px; font-size: 16px; font-weight: 700; }
.fact p { margin: 0; color: var(--ink-2); font-size: 14.5px; }
.fact .num { display: block; font-size: 30px; font-weight: 800; color: var(--brand); line-height: 1.2; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--line); padding: 44px 0 40px;
  color: var(--ink-3); font-size: 14px; background: #fcfcfe;
}
.site-footer .cols { display: flex; flex-wrap: wrap; gap: 40px; justify-content: space-between; }
.site-footer h5 { margin: 0 0 12px; font-size: 14px; color: var(--ink); font-weight: 700; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: 7px; }
.site-footer a { color: var(--ink-3); }
.site-footer a:hover { color: var(--brand); }
.legal { margin-top: 34px; padding-top: 22px; border-top: 1px solid var(--line); font-size: 13px; line-height: 1.9; }
.legal .entity { color: var(--ink-2); font-weight: 600; }

/* ---------- Misc ---------- */
.note {
  background: var(--warn-bg); border: 1px solid var(--warn-line);
  border-radius: 10px; padding: 16px 18px; font-size: 14.5px; color: #6b5312;
}
.note strong { color: #4a390a; }
code {
  background: var(--bg-soft); border: 1px solid var(--line);
  border-radius: 5px; padding: 1px 6px; font-size: 13px;
  font-family: ui-monospace, "SF Mono", Consolas, "Courier New", monospace;
  word-break: break-all;
}

@media (max-width: 640px) {
  .site-header .wrap { height: 58px; gap: 12px; }
  .site-nav { gap: 14px; font-size: 14px; }
  .lang-switch { padding-left: 12px; }
  .hero { padding: 52px 0 40px; }
  .section { padding: 44px 0; }
  .site-footer .cols { gap: 28px; }
}