/* BAIRUI SPORT — B2B billiard cue factory site
   Design tokens */
:root {
  --ink: #14181b;
  --ink-2: #3d464d;
  --ink-3: #6b767e;
  --line: #e4e7ea;
  --line-2: #cfd5da;
  --bg: #ffffff;
  --bg-soft: #f6f7f8;
  --bg-dark: #101a1c;
  --brand: #0e3b3c;
  --brand-2: #17595a;
  --accent: #b8924e;
  --accent-soft: #f3ebdc;
  --radius: 6px;
  --max: 1200px;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0; font-weight: 600; line-height: 1.25; letter-spacing: -0.01em; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 28px; }
.section { padding: 88px 0; }
.section--soft { background: var(--bg-soft); }
.section--dark { background: var(--bg-dark); color: #eef2f3; }
.section--tight { padding: 56px 0; }

/* type scale */
.eyebrow {
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 14px;
}
.section-title { font-size: clamp(26px, 3.2vw, 38px); }
.section-lead {
  margin-top: 16px;
  color: var(--ink-3);
  max-width: 640px;
  font-size: 16px;
}
.section--dark .section-lead { color: #9fb0b3; }
.section-head { margin-bottom: 48px; }

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: 0.02em; }
.logo-mark {
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--brand);
  position: relative; flex: 0 0 auto;
}
.logo-mark::after {
  content: ""; position: absolute; inset: 9px;
  border-radius: 50%; border: 2px solid var(--accent);
}
.logo-text { font-size: 17px; }
.logo-sub { display: block; font-size: 10px; letter-spacing: 0.18em; color: var(--ink-3); font-weight: 500; }

.nav { display: flex; align-items: center; gap: 30px; }
.nav a {
  font-size: 14.5px;
  color: var(--ink-2);
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
.nav a:hover { color: var(--brand); }
.nav a.is-active { color: var(--brand); border-color: var(--accent); }

.header-actions { display: flex; align-items: center; gap: 14px; }
.lang-switch { display: flex; border: 1px solid var(--line-2); border-radius: 999px; overflow: hidden; }
.lang-switch a { font-size: 12.5px; padding: 5px 12px; color: var(--ink-3); }
.lang-switch a.is-active { background: var(--brand); color: #fff; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px; border-radius: var(--radius);
  font-size: 14.5px; font-weight: 500; cursor: pointer;
  border: 1px solid transparent; transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.btn--primary { background: var(--brand); color: #fff; }
.btn--primary:hover { background: var(--brand-2); }
.btn--accent { background: var(--accent); color: #1b1408; }
.btn--accent:hover { background: #a8823f; }
.btn--ghost { border-color: var(--line-2); color: var(--ink); }
.btn--ghost:hover { border-color: var(--brand); color: var(--brand); }
.btn--lg { padding: 15px 30px; font-size: 15.5px; }
.btn--block { width: 100%; }

.nav-toggle {
  display: none; width: 40px; height: 40px; border-radius: var(--radius);
  border: 1px solid var(--line-2); background: #fff; cursor: pointer;
  align-items: center; justify-content: center; flex-direction: column; gap: 4px;
}
.nav-toggle span { display: block; width: 16px; height: 1.5px; background: var(--ink); }

/* hero */
.hero {
  position: relative;
  background:
    radial-gradient(900px 420px at 78% -10%, rgba(184, 146, 78, 0.28), transparent 70%),
    linear-gradient(160deg, #0c2023 0%, #123033 55%, #0d2225 100%);
  color: #f2f5f6;
  padding: 104px 0 92px;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute; right: -140px; top: -120px;
  width: 520px; height: 520px; border-radius: 50%;
  border: 1px solid rgba(184, 146, 78, 0.28);
  box-shadow: 0 0 0 60px rgba(184, 146, 78, 0.05), 0 0 0 140px rgba(184, 146, 78, 0.03);
  pointer-events: none;
}
.hero-inner { position: relative; z-index: 1; max-width: 760px; }
.hero h1 { font-size: clamp(32px, 4.6vw, 54px); letter-spacing: -0.02em; }
.hero p { margin-top: 22px; font-size: 17px; color: #b9c7c9; max-width: 620px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.hero-note { margin-top: 18px; font-size: 13px; color: #8fa1a4; }

/* stats */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: rgba(255, 255, 255, 0.12); margin-top: 64px; border-radius: var(--radius); overflow: hidden; position: relative; z-index: 1; }
.stats div { background: rgba(12, 32, 35, 0.72); padding: 24px 20px; }
.stat-num { font-size: 30px; font-weight: 600; color: #fff; letter-spacing: -0.02em; }
.stat-num span { color: var(--accent); }
.stat-label { font-size: 13px; color: #93a5a8; margin-top: 6px; }

/* grids & cards */
.grid { display: grid; gap: 24px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 26px;
  transition: border-color 0.18s, transform 0.18s;
}
.card:hover { border-color: var(--line-2); transform: translateY(-2px); }
.card h3 { font-size: 18px; margin-bottom: 10px; }
.card p { font-size: 14.5px; color: var(--ink-3); }
.card-index { font-size: 12px; letter-spacing: 0.14em; color: var(--accent); font-weight: 600; margin-bottom: 14px; }

/* product tiles */
.tile { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: #fff; display: flex; flex-direction: column; }
.tile-media {
  aspect-ratio: 4 / 3;
  background:
    repeating-linear-gradient(115deg, rgba(14, 59, 60, 0.055) 0 2px, transparent 2px 11px),
    linear-gradient(150deg, #eef1f1, #dfe5e6);
  display: flex; align-items: center; justify-content: center;
  position: relative;
}
.tile-media span {
  font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase;
  color: #8b979a; border: 1px dashed #b9c2c5; padding: 8px 14px; border-radius: 999px;
  background: rgba(255,255,255,0.72);
}
.tile-body { padding: 22px 22px 26px; flex: 1; display: flex; flex-direction: column; }
.tile-body h3 { font-size: 17px; }
.tile-body p { margin-top: 8px; font-size: 14px; color: var(--ink-3); flex: 1; }
.tile-specs { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  font-size: 12px; color: var(--ink-2); background: var(--bg-soft);
  border: 1px solid var(--line); padding: 4px 10px; border-radius: 999px;
}

/* process */
.process { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; counter-reset: step; }
.process li { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; position: relative; }
.process li::before {
  counter-increment: step; content: "0" counter(step);
  font-size: 12px; letter-spacing: 0.12em; color: var(--accent); font-weight: 600;
}
.process h3 { font-size: 16.5px; margin: 10px 0 8px; }
.process p { font-size: 14px; color: var(--ink-3); }

/* spec table */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; font-size: 14.5px; min-width: 680px; }
th, td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { background: var(--bg-soft); font-weight: 600; font-size: 13px; letter-spacing: 0.02em; color: var(--ink-2); }
tr:last-child td { border-bottom: none; }
td { color: var(--ink-2); }

/* split block */
.split { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center; }
.split-media {
  aspect-ratio: 5 / 4; border-radius: var(--radius);
  background:
    repeating-linear-gradient(0deg, rgba(14, 59, 60, 0.05) 0 1px, transparent 1px 26px),
    repeating-linear-gradient(90deg, rgba(14, 59, 60, 0.05) 0 1px, transparent 1px 26px),
    linear-gradient(140deg, #e9edee, #d7dfe0);
  display: flex; align-items: center; justify-content: center;
}
.split-media span { font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: #8b979a; }
.split h2 { font-size: clamp(24px, 2.8vw, 32px); }
.split p { margin-top: 16px; color: var(--ink-3); }
.checklist { margin-top: 24px; display: grid; gap: 12px; }
.checklist li { position: relative; padding-left: 26px; font-size: 15px; color: var(--ink-2); }
.checklist li::before {
  content: ""; position: absolute; left: 0; top: 9px;
  width: 12px; height: 7px; border-left: 2px solid var(--brand); border-bottom: 2px solid var(--brand);
  transform: rotate(-45deg);
}

/* CTA band */
.cta-band { background: var(--brand); color: #fff; padding: 64px 0; }
.cta-band .inner { display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.cta-band h2 { font-size: clamp(22px, 2.6vw, 30px); }
.cta-band p { margin-top: 10px; color: #b8cdce; font-size: 15px; }

/* form */
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field--full { grid-column: 1 / -1; }
label { font-size: 13px; font-weight: 500; color: var(--ink-2); }
input, select, textarea {
  font-family: inherit; font-size: 15px; color: var(--ink);
  padding: 12px 14px; border: 1px solid var(--line-2); border-radius: var(--radius);
  background: #fff; width: 100%; transition: border-color 0.15s;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--brand); }
textarea { resize: vertical; min-height: 120px; }
.form-hint { font-size: 12.5px; color: var(--ink-3); }
.form-status { margin-top: 14px; font-size: 14px; }

/* contact info */
.contact-list { display: grid; gap: 20px; }
.contact-item { border-left: 2px solid var(--accent); padding-left: 16px; }
.contact-item dt { font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-3); }
.contact-item dd { margin: 4px 0 0; font-size: 15.5px; }

/* footer */
.site-footer { background: #0c1517; color: #9fb0b3; padding: 64px 0 32px; font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; }
.site-footer h4 { color: #e6ecee; font-size: 13px; letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 16px; }
.site-footer a:hover { color: var(--accent); }
.footer-links { display: grid; gap: 10px; }
.footer-bottom {
  margin-top: 48px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.1);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 12.5px; color: #7c8d90;
}

/* whatsapp float */
.wa-float {
  position: fixed; right: 22px; bottom: 22px; z-index: 60;
  display: inline-flex; align-items: center; gap: 10px;
  background: #1f9d55; color: #fff; padding: 12px 18px;
  border-radius: 999px; font-size: 14px; font-weight: 500;
  box-shadow: 0 6px 20px rgba(31, 157, 85, 0.28);
}
.wa-float:hover { background: #188045; }
.wa-float svg { width: 18px; height: 18px; fill: currentColor; }

/* page hero (inner pages) */
.page-hero { background: var(--bg-dark); color: #eef2f3; padding: 72px 0 64px; }
.page-hero h1 { font-size: clamp(28px, 3.6vw, 42px); }
.page-hero p { margin-top: 16px; color: #9fb0b3; max-width: 680px; }
.breadcrumb { font-size: 12.5px; color: #7f9295; margin-bottom: 18px; letter-spacing: 0.04em; }
.breadcrumb a:hover { color: var(--accent); }

/* notice bar for placeholder content */
.demo-note {
  background: var(--accent-soft); border: 1px solid #e6d7b8; color: #6b5324;
  font-size: 13px; padding: 10px 16px; border-radius: var(--radius);
  margin-bottom: 28px;
}

/* responsive */
@media (max-width: 960px) {
  .grid--3, .grid--4, .process, .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: 32px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .nav { display: none; }
  .nav-toggle { display: flex; }
  .nav.is-open {
    display: flex; position: absolute; top: 72px; left: 0; right: 0;
    flex-direction: column; align-items: flex-start; gap: 0;
    background: #fff; border-bottom: 1px solid var(--line); padding: 8px 28px 20px;
  }
  .nav.is-open a { padding: 12px 0; width: 100%; border-bottom: 1px solid var(--line); }
}
@media (max-width: 640px) {
  .section { padding: 64px 0; }
  .grid--3, .grid--4, .process, .grid--2, .form-grid, .footer-grid { grid-template-columns: 1fr; }
  .hero { padding: 72px 0 64px; }
  .container { padding: 0 20px; }
  .header-inner { height: 64px; }
  .logo-sub { display: none; }
  .wa-float { right: 14px; bottom: 14px; padding: 11px 15px; font-size: 13px; }
}

/* 反垃圾提交蜜罐字段，真人不可见 */
.hp-field {
  position: absolute !important;
  left: -9999px !important;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}