/* ============================================================
   新疆澜域商务咨询有限公司 — 官网样式（中/英/俄三语共用）
   设计语言参考 boma-group.com：深藏蓝 + 正红 + 米色
   ============================================================ */

:root {
  --navy: #0b2a5b;
  --navy-2: #081f45;
  --navy-3: #103a75;
  --red: #cf1f2e;
  --red-dark: #b31523;
  --cream: #f7f3ea;
  --mist: #eef1f6;
  --ink: #16263f;
  --muted: #5b6878;
  --line: #dfe4ec;
  --white: #ffffff;
  --radius: 6px;
  --shadow: 0 18px 50px rgba(8, 31, 69, 0.12);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", "Roboto", "Helvetica Neue", Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.container { max-width: 1180px; margin: 0 auto; padding: 0 28px; }

.accent { color: var(--red); }
.accent-dark { color: var(--navy); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 14px 30px;
  border-radius: 4px;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.5px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all 0.2s ease;
}
.btn--red { background: var(--red); color: #fff; border-color: var(--red); }
.btn--red:hover { background: var(--red-dark); border-color: var(--red-dark); transform: translateY(-2px); }
.btn--ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,0.7); }
.btn--ghost:hover { background: #fff; color: var(--navy); }
.btn--lg { padding: 16px 42px; font-size: 16px; }

/* ---------- Nav ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background 0.3s ease, box-shadow 0.3s ease;
  padding: 18px 0;
}
.nav.is-scrolled { background: var(--navy-2); box-shadow: 0 6px 24px rgba(0,0,0,0.25); padding: 10px 0; }
.nav__inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.nav__right { display: flex; align-items: center; gap: 18px; }
.nav__logo { display: flex; align-items: center; gap: 10px; color: #fff; }
.nav__mark {
  width: 38px; height: 38px; border-radius: 4px;
  background: var(--red); color: #fff;
  display: grid; place-items: center; font-weight: 800; font-size: 18px;
}
.nav__word { font-weight: 800; font-size: 20px; letter-spacing: 1px; display: flex; flex-direction: column; line-height: 1.1; }
.nav__en { font-size: 10px; letter-spacing: 3px; font-weight: 500; opacity: 0.8; }
.nav__links { display: flex; align-items: center; gap: 26px; }
.nav__links a { color: rgba(255,255,255,0.9); font-weight: 500; font-size: 15px; }
.nav__links a:hover { color: #fff; }
.nav__links .nav__cta { background: var(--red); padding: 10px 20px; border-radius: 4px; color: #fff; }

/* ---------- Language switcher ---------- */
.lang-switch {
  display: inline-flex; align-items: center;
  border: 1px solid rgba(255,255,255,0.4); border-radius: 999px;
  overflow: hidden; margin-left: 6px;
}
.lang-switch a {
  padding: 6px 12px; font-size: 13px; font-weight: 700;
  color: rgba(255,255,255,0.8); letter-spacing: 0.5px;
}
.lang-switch a.is-active { background: var(--red); color: #fff; }
.lang-switch a:hover:not(.is-active) { background: rgba(255,255,255,0.15); color: #fff; }

.nav__burger { display: none; background: none; border: 0; cursor: pointer; }
.nav__burger span { display: block; width: 26px; height: 2px; background: #fff; margin: 6px 0; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(16,58,117,0.9), transparent 60%),
    linear-gradient(135deg, #081f45 0%, #0b2a5b 55%, #103a75 100%);
  color: #fff;
  display: flex; align-items: center;
  padding: 140px 0 90px;
  overflow: hidden;
}
.hero__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(ellipse at 30% 40%, #000 40%, transparent 80%);
}
.hero__inner { position: relative; z-index: 2; max-width: 900px; }
.hero__eyebrow {
  font-size: 13px; letter-spacing: 3px; color: #ff8a93; font-weight: 600;
  text-transform: uppercase; margin-bottom: 22px;
}
.hero__title {
  font-size: clamp(38px, 6vw, 72px);
  line-height: 1.08; font-weight: 800; letter-spacing: -1px;
  margin-bottom: 24px;
}
.hero__sub { font-size: clamp(16px, 1.6vw, 20px); color: rgba(255,255,255,0.85); max-width: 680px; margin-bottom: 36px; }
.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero__badges { list-style: none; display: flex; gap: 26px; flex-wrap: wrap; margin-top: 46px; font-size: 14px; color: rgba(255,255,255,0.75); }

/* ---------- Stats ---------- */
.stats { background: var(--cream); padding: 70px 0; }
.stats__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
.stat { border-left: 3px solid var(--red); padding-left: 20px; }
.stat__num { font-size: 40px; font-weight: 800; color: var(--navy); line-height: 1.1; }
.stat__label { color: var(--muted); font-size: 14px; margin-top: 8px; }

/* ---------- About ---------- */
.about { background: var(--cream); padding: 40px 0 100px; }
.eyebrow {
  color: var(--red); font-weight: 700; letter-spacing: 2px;
  font-size: 13px; text-transform: uppercase; margin-bottom: 18px;
}
.eyebrow--light { color: #ff8a93; }
.h2 { font-size: clamp(26px, 3.6vw, 44px); font-weight: 800; line-height: 1.25; color: var(--navy); margin-bottom: 34px; }
.h2--light { color: #fff; }
.about__body { max-width: 820px; }
.about__body p { font-size: 18px; color: #2a3a57; margin-bottom: 18px; }
.about__body .hl { background: linear-gradient(transparent 60%, rgba(207,31,46,0.18) 60%); font-weight: 600; }

/* ---------- Services (accordion) ---------- */
.services {
  background: linear-gradient(160deg, #081f45, #0b2a5b);
  color: #fff; padding: 100px 0;
}
.acc { margin-top: 30px; }
.acc__item { margin-bottom: 10px; border-radius: 6px; overflow: hidden; }
.acc__head {
  width: 100%; text-align: left; cursor: pointer;
  background: var(--navy-3); color: #fff;
  border: 0; padding: 22px 26px;
  display: flex; align-items: center; gap: 20px;
  font-size: 18px; font-weight: 700; font-family: inherit;
  transition: background 0.2s ease;
}
.acc__head:hover { background: #144585; }
.acc__item.is-open .acc__head { background: var(--red); }
.acc__idx { font-size: 13px; opacity: 0.7; font-weight: 600; }
.acc__title small { display: block; font-size: 12px; font-weight: 400; opacity: 0.75; letter-spacing: 1px; }
.acc__panel { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; background: #fff; color: var(--ink); }
.acc__content { padding: 28px 26px; }
.acc__content p { font-size: 16px; color: #2a3a57; margin-bottom: 18px; max-width: 760px; }
.tags { list-style: none; display: flex; flex-wrap: wrap; gap: 10px; }
.tags li {
  border: 1.5px solid var(--navy); color: var(--navy);
  padding: 6px 14px; border-radius: 3px; font-size: 13px; font-weight: 600;
}

/* ---------- Service group headings ---------- */
.acc__group { margin-top: 38px; }
.acc__group:first-of-type { margin-top: 0; }
.acc__group-title {
  display: flex; align-items: center; gap: 14px;
  margin: 0 0 18px; font-size: 19px; font-weight: 800; color: #fff;
}
.acc__group-title::before {
  content: ""; width: 26px; height: 3px; background: var(--red); flex: none;
}
.acc__group-title small {
  font-size: 12px; font-weight: 500; color: rgba(255,255,255,0.55);
  letter-spacing: 2px; text-transform: uppercase;
}

/* ---------- Category tags in trade card ---------- */
.dual__cats-title {
  font-size: 13px; font-weight: 700; color: var(--muted);
  letter-spacing: 1px; margin: 0 0 10px;
}
.dual__cats { list-style: none; display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 26px; }
.dual__cats li {
  border: 1.5px solid var(--navy); color: var(--navy);
  padding: 6px 14px; border-radius: 3px; font-size: 13px; font-weight: 600;
}

/* ---------- Cases ---------- */
.cases { background: var(--mist); padding: 100px 0; }
.cases__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.case {
  background: #fff; border-radius: 8px; padding: 34px 28px;
  box-shadow: var(--shadow); border-top: 4px solid var(--red);
}
.case__num { font-size: 14px; font-weight: 800; color: var(--red); letter-spacing: 2px; }
.case h3 { font-size: 20px; color: var(--navy); margin: 12px 0 14px; }
.case p { color: var(--muted); font-size: 15px; }
.case strong { color: var(--navy); }

/* ---------- Why band ---------- */
.why {
  background:
    radial-gradient(900px 400px at 90% 20%, rgba(207,31,46,0.25), transparent 60%),
    linear-gradient(135deg, #081f45, #0b2a5b);
  color: #fff; padding: 110px 0; text-align: center;
}
.why__inner { max-width: 820px; margin: 0 auto; }
.why p { color: rgba(255,255,255,0.85); font-size: 18px; margin-bottom: 34px; }

/* ---------- Request form ---------- */
.request { background: var(--cream); padding: 100px 0; }
.request__lead { max-width: 680px; color: var(--muted); margin: -18px 0 36px; }
.form {
  background: #fff; border-radius: 10px; padding: 40px;
  box-shadow: var(--shadow); max-width: 860px;
}
.form__group { margin-bottom: 26px; border: 0; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form__group legend, .form__group label {
  display: block; font-weight: 700; color: var(--navy); margin-bottom: 10px; font-size: 15px;
}
.form__checks { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px 20px; }
.form__checks label {
  display: flex; align-items: center; gap: 10px; font-weight: 500;
  background: var(--mist); padding: 12px 14px; border-radius: 6px; cursor: pointer; margin: 0;
}
.form__checks input { accent-color: var(--red); width: 16px; height: 16px; }
.form input[type="tel"], .form input[type="email"], .form textarea {
  width: 100%; border: 1.5px solid var(--line); border-radius: 6px;
  padding: 13px 15px; font-family: inherit; font-size: 16px; color: var(--ink);
}
.form input:focus, .form textarea:focus { outline: none; border-color: var(--navy); }
.form__submit { width: 100%; }
.form__note { text-align: center; margin-top: 14px; color: var(--muted); font-size: 13px; }

/* ---------- Footer ---------- */
.footer { background: var(--navy-2); color: rgba(255,255,255,0.85); }
.footer__grid {
  display: grid; grid-template-columns: 1.6fr 1fr 1.2fr; gap: 40px;
  padding: 70px 28px 50px;
}
.footer__logo { font-weight: 800; font-size: 20px; margin-bottom: 16px; display: flex; align-items: center; gap: 10px; }
.footer__brand p { font-size: 14px; color: rgba(255,255,255,0.7); margin-bottom: 10px; }
.footer__law { color: #ff8a93 !important; }
.footer__col h4 { color: #fff; margin-bottom: 16px; font-size: 15px; letter-spacing: 1px; }
.footer__col a, .footer__col p { display: block; font-size: 14px; color: rgba(255,255,255,0.75); margin-bottom: 10px; }
.footer__col a:hover { color: #fff; }
.footer__bar { background: var(--red); color: #fff; padding: 18px 0; }
.footer__bar-in { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; font-size: 13px; }

/* ---------- WhatsApp float ---------- */
.wa-float {
  position: fixed; right: 22px; bottom: 22px; z-index: 99;
  width: 56px; height: 56px; border-radius: 50%;
  background: #25d366; display: grid; place-items: center;
  box-shadow: 0 8px 24px rgba(0,0,0,0.3); transition: transform 0.2s;
}
.wa-float:hover { transform: scale(1.08); }

/* ---------- Dual audience platform ---------- */
.dual { background: var(--cream); padding: 100px 0; }
.dual__intro { max-width: 780px; margin-bottom: 44px; }
.dual__lead { font-size: 18px; color: #2a3a57; }
.dual__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.dual__card {
  background: #fff; border-radius: 10px; padding: 40px 36px;
  box-shadow: var(--shadow); border-top: 5px solid var(--red);
  display: flex; flex-direction: column;
}
.dual__card--navy { border-top-color: var(--navy); }
.dual__tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: 800; letter-spacing: 2px;
  color: var(--red); text-transform: uppercase; margin-bottom: 14px;
}
.dual__card--navy .dual__tag { color: var(--navy); }
.dual__card h3 { font-size: 26px; color: var(--navy); line-height: 1.25; margin-bottom: 8px; }
.dual__card .en { font-size: 12px; letter-spacing: 2px; color: var(--muted); text-transform: uppercase; margin-bottom: 18px; display: block; }
.dual__card p { color: var(--muted); font-size: 15px; margin-bottom: 22px; }
.dual__list { list-style: none; margin-bottom: 26px; flex: 1; }
.dual__list li {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 9px 0; border-bottom: 1px solid var(--line);
  font-size: 15px; color: #2a3a57; font-weight: 500;
}
.dual__list li:last-child { border-bottom: 0; }
.dual__list .mark { color: var(--red); font-weight: 800; }
.dual__card--navy .dual__list .mark { color: var(--navy); }

/* ---------- Contact (domestic & overseas) ---------- */
.contact { background: var(--mist); padding: 100px 0; }
.contact__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.contact__col {
  background: #fff; border-radius: 10px; padding: 36px 32px;
  box-shadow: var(--shadow); border-top: 4px solid var(--red);
}
.contact__col--navy { border-top-color: var(--navy); }
.contact__col h3 { font-size: 22px; color: var(--navy); margin-bottom: 6px; }
.contact__col .en { font-size: 12px; letter-spacing: 2px; color: var(--muted); text-transform: uppercase; margin-bottom: 18px; display: block; }
.contact__item {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 0; border-bottom: 1px solid var(--line);
  font-size: 15px; color: #2a3a57;
}
.contact__item:last-of-type { border-bottom: 0; }
.contact__item a { font-weight: 600; color: var(--navy); }
.contact__item a:hover { color: var(--red); }
.contact__item .ico { color: var(--red); font-weight: 800; }
.contact__col--navy .contact__item .ico { color: var(--navy); }
.contact__qrs { display: flex; gap: 18px; margin-top: 16px; flex-wrap: wrap; }
.contact__qr { flex: 1; min-width: 150px; max-width: 200px; text-align: center; }
.contact__qr img {
  width: 100%; border-radius: 8px; border: 1.5px solid var(--line);
  background: #fff; padding: 8px;
}
.contact__qr span { display: block; font-size: 13px; color: var(--muted); margin-top: 8px; font-weight: 600; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 900px) {
  .dual__grid { grid-template-columns: 1fr; }
  .contact__grid { grid-template-columns: 1fr; }
  .stats__grid { grid-template-columns: repeat(2, 1fr); gap: 22px 18px; }
  .stat { min-width: 0; }
  .stat__num { font-size: 26px; overflow-wrap: break-word; word-break: break-word; }
  .stat__label { overflow-wrap: break-word; word-break: break-word; }
  .cases__grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; gap: 30px; }
  .form__row { grid-template-columns: 1fr; }
  .form__checks { grid-template-columns: 1fr; }

  .nav__links {
    position: fixed; top: 64px; right: 0; left: 0;
    background: var(--navy-2); flex-direction: column;
    padding: 20px 0; gap: 18px;
    transform: translateY(-140%); transition: transform 0.3s ease;
  }
  .nav__links.is-open { transform: translateY(0); }
  .nav__burger { display: block; }
}