/* =========================================================================
 * 全局样式 —— 深灰 + 黑 + 低饱和红点缀，Quiet Luxury 简约商务
 * 无第三方框架 / 无外部字体依赖（系统无衬线字体栈，含中阿字体）
 * ========================================================================= */

:root {
  --bg: #0e0e0f;
  --surface: #161618;
  --surface-2: #1f1f22;
  --border: rgba(255, 255, 255, 0.09);
  --text: #ededed;
  --muted: #9b9ba1;
  --accent: #b23a3a;        /* 低饱和红 */
  --accent-2: #c8504a;
  --wa: #25D366;            /* WhatsApp 品牌绿（用于转化按钮） */
  --radius: 14px;
  --maxw: 1180px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, "Noto Sans", "Noto Sans Arabic", "PingFang SC", "Microsoft YaHei",
    "Hiragino Sans GB", sans-serif;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

h1, h2, h3 { line-height: 1.25; font-weight: 600; letter-spacing: -0.01em; margin: 0 0 .6em; }
h1 { font-size: clamp(2rem, 4.5vw, 3.2rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1em; color: var(--muted); }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }

.section { padding: 84px 0; }
.section--tight { padding: 56px 0; }

.eyebrow {
  display: inline-block;
  font-size: .8rem; letter-spacing: .18em; text-transform: uppercase;
  color: var(--accent-2); margin-bottom: 14px; font-weight: 600;
}
.lead { font-size: 1.08rem; max-width: 760px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 24px; border-radius: 999px; font-weight: 600; font-size: .98rem;
  border: 1px solid transparent; cursor: pointer; transition: .18s ease;
  background: var(--surface-2); color: var(--text); border-color: var(--border);
}
.btn:hover { transform: translateY(-1px); }
.btn--accent { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn--accent:hover { background: var(--accent-2); }
.btn--ghost { background: transparent; border-color: var(--border); }
.btn--ghost:hover { border-color: var(--accent); color: #fff; }
.btn--wa { background: var(--wa); color: #06381c; font-weight: 700; }
.btn--wa:hover { filter: brightness(1.05); }
.btn--block { width: 100%; margin-top: 14px; }

/* ---------- 顶部导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(14, 14, 15, 0.82);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: .02em; }
.brand__mark {
  width: 30px; height: 30px; border-radius: 8px; background: var(--accent);
  display: grid; place-items: center; color: #fff; font-size: .9rem; font-weight: 800;
}
.nav__menu { display: flex; align-items: center; gap: 26px; }
.nav__menu a { color: var(--muted); font-size: .96rem; font-weight: 500; transition: .15s; }
.nav__menu a:hover, .nav__menu a.is-active { color: var(--text); }
.nav__right { display: flex; align-items: center; gap: 16px; }

/* 语言切换 */
.lang { display: inline-flex; border: 1px solid var(--border); border-radius: 999px; overflow: hidden; }
.lang button {
  background: transparent; border: 0; color: var(--muted); padding: 6px 11px;
  font-size: .82rem; cursor: pointer; font-weight: 600;
}
.lang button.is-active { background: var(--accent); color: #fff; }
.lang button:hover { color: var(--text); }
/* 静态语言切换（链接，无需 JS） */
.lang a {
  background: transparent; border: 0; color: var(--muted); padding: 6px 11px;
  font-size: .82rem; cursor: pointer; font-weight: 600; text-decoration: none; line-height: 1.4;
}
.lang a.is-active { background: var(--accent); color: #fff; }
.lang a:hover { color: var(--text); }

.nav__toggle { display: none; background: transparent; border: 1px solid var(--border); border-radius: 8px; width: 40px; height: 38px; cursor: pointer; }
.nav__toggle span, .nav__toggle span::before, .nav__toggle span::after {
  content: ""; display: block; width: 18px; height: 2px; background: var(--text); margin: 0 auto; position: relative;
}
.nav__toggle span::before { position: absolute; top: -6px; }
.nav__toggle span::after { position: absolute; top: 6px; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(1200px 500px at 80% -10%, rgba(178, 58, 58, 0.22), transparent 60%),
    linear-gradient(180deg, #121214, #0e0e0f);
  border-bottom: 1px solid var(--border);
}
.hero__inner { padding: 120px 0 110px; max-width: 860px; }
.hero h1 { margin-bottom: 18px; }
.hero p { font-size: 1.12rem; max-width: 680px; }
.hero .btn { margin-top: 8px; }
.hero__glow { position: absolute; right: -120px; top: 40px; width: 420px; height: 420px; border-radius: 50%;
  background: radial-gradient(circle, rgba(178,58,58,.18), transparent 70%); filter: blur(10px); pointer-events: none; }

/* ---------- 区块标题 ---------- */
.section__head { max-width: 720px; margin-bottom: 40px; }
.section__head h2 { margin-bottom: 10px; }

/* ---------- 产品概览（首页卡片） ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.feature {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px; transition: .2s ease;
}
.feature:hover { border-color: rgba(178,58,58,.5); transform: translateY(-2px); }
.feature__icon { width: 42px; height: 42px; border-radius: 10px; background: rgba(178,58,58,.14); color: var(--accent-2); display: grid; place-items: center; margin-bottom: 16px; font-weight: 800; }
.feature h3 { margin-bottom: 8px; }
.feature p { margin: 0; font-size: .96rem; }

/* ---------- 优势 ---------- */
.adv { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; }
.adv__num { color: var(--accent-2); font-weight: 800; font-size: .9rem; letter-spacing: .1em; }
.adv h3 { margin: 10px 0 8px; }
.adv p { margin: 0; font-size: .95rem; }

/* ---------- 案例占位 ---------- */
.cases {
  background: var(--surface); border: 1px dashed var(--border); border-radius: var(--radius);
  padding: 40px; text-align: center; color: var(--muted);
}
.cases__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 24px; }
.case { background: var(--surface-2); border: 1px solid var(--border); border-radius: 12px; height: 120px; display: grid; place-items: center; color: var(--muted); font-size: .9rem; }

/* ---------- 产品页 ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 30px; }
.chip {
  background: var(--surface); border: 1px solid var(--border); color: var(--muted);
  padding: 9px 18px; border-radius: 999px; cursor: pointer; font-size: .92rem; font-weight: 600; transition: .15s;
}
.chip:hover { color: var(--text); }
.chip.is-active { background: var(--accent); border-color: var(--accent); color: #fff; }

.products-empty { color: var(--muted); padding: 30px 0; }

.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; display: flex; flex-direction: column; transition: .2s ease;
}
.card:hover { border-color: rgba(178,58,58,.5); transform: translateY(-3px); }
.card__media { position: relative; display: block; background: var(--surface-2); }
.card__media img { width: 100%; height: 220px; object-fit: cover; }
.card__tag { position: absolute; top: 12px; left: 12px; background: var(--accent); color: #fff; font-size: .76rem; font-weight: 700; padding: 4px 10px; border-radius: 999px; }
.card__body { padding: 20px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.card__cat { color: var(--accent-2); font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; font-weight: 700; }
.card__title { margin: 0; font-size: 1.12rem; }
.card__title a:hover { color: var(--accent-2); }
.card__desc { font-size: .92rem; margin: 0 0 6px; flex: 1; }

/* 详情 */
.back-link { display: inline-block; color: var(--muted); margin-bottom: 22px; font-weight: 600; }
.back-link:hover { color: var(--text); }
.detail { display: grid; grid-template-columns: 1.1fr 1fr; gap: 40px; align-items: start; }
.detail__media { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; }
.gallery__main img { width: 100%; border-radius: 10px; object-fit: cover; max-height: 460px; }
.detail__title { margin: 6px 0 10px; }
.detail__short { font-size: 1.05rem; }
.detail__h2 { font-size: 1.15rem; margin: 26px 0 12px; color: var(--text); border-left: 3px solid var(--accent); padding-left: 12px; }
.spec-table { width: 100%; border-collapse: collapse; font-size: .95rem; }
.spec-table th, .spec-table td { text-align: left; padding: 11px 12px; border-bottom: 1px solid var(--border); }
.spec-table th { color: var(--muted); font-weight: 600; width: 42%; }
.spec-table td { color: var(--text); }
.scene-list { margin: 0; padding-left: 20px; color: var(--muted); }
.scene-list li { margin-bottom: 6px; }
.detail__desc { color: var(--muted); }

/* ---------- 关于 / 服务 ---------- */
.panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 30px; }
.panel + .panel { margin-top: 20px; }
.strength { list-style: none; padding: 0; margin: 14px 0 0; }
.strength li { padding: 10px 0 10px 26px; position: relative; border-bottom: 1px solid var(--border); color: var(--text); }
.strength li::before { content: ""; position: absolute; left: 0; top: 18px; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }
.notice {
  background: rgba(178,58,58,.10); border: 1px solid rgba(178,58,58,.4); border-radius: var(--radius);
  padding: 22px 24px; margin-top: 26px;
}
.notice h3 { color: var(--accent-2); margin-bottom: 6px; }
.notice p { color: var(--text); margin: 0; }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: start; }
.info-row { display: flex; gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--border); }
.info-row__label { color: var(--muted); min-width: 90px; font-weight: 600; }
.wa-box { background: rgba(37,211,102,.10); border: 1px solid rgba(37,211,102,.35); border-radius: var(--radius); padding: 22px; margin-bottom: 20px; }
.wa-box a { color: #1f9d57; font-weight: 700; word-break: break-all; }
.map { width: 100%; height: 320px; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; margin-top: 12px; }
.map iframe { width: 100%; height: 100%; border: 0; }
.form { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; }
.form label { display: block; font-size: .9rem; color: var(--muted); margin: 0 0 6px; font-weight: 600; }
.form input, .form textarea {
  width: 100%; background: var(--surface-2); border: 1px solid var(--border); border-radius: 10px;
  color: var(--text); padding: 12px 14px; font-family: inherit; font-size: .98rem; margin-bottom: 16px;
}
.form input:focus, .form textarea:focus { outline: none; border-color: var(--accent); }
.form__note { font-size: .88rem; color: var(--muted); background: var(--surface-2); border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; margin-bottom: 16px; }

/* ---------- 页脚 ---------- */
.footer { border-top: 1px solid var(--border); padding: 46px 0 30px; background: #0b0b0c; }
.footer__top { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; margin-bottom: 26px; }
.footer__tag { color: var(--muted); max-width: 420px; font-size: .94rem; }
.footer__links { display: flex; gap: 22px; flex-wrap: wrap; }
.footer__links a { color: var(--muted); font-size: .94rem; }
.footer__links a:hover { color: var(--text); }
.footer__bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; color: var(--muted); font-size: .86rem; border-top: 1px solid var(--border); padding-top: 20px; }
.footer__legal { flex-basis: 100%; margin: 0; font-size: .8rem; color: var(--muted); opacity: .85; }

/* ---------- 悬浮 WhatsApp 按钮 ---------- */
.wa-float {
  position: fixed; right: 20px; bottom: 20px; z-index: 90;
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--wa); color: #06381c; font-weight: 700; font-size: .92rem;
  padding: 13px 18px; border-radius: 999px; box-shadow: 0 8px 24px rgba(37,211,102,.35);
  max-width: calc(100vw - 40px);
  transition: transform .18s ease;
}
.wa-float:hover { transform: translateY(-2px); }
.wa-float svg { flex: none; }
.wa-float__text { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ---------- 面包屑 ---------- */
.breadcrumb { color: var(--muted); font-size: .9rem; margin-bottom: 14px; }
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--text); }

/* ---------- RTL（阿拉伯语） ---------- */
html[dir="rtl"] body { direction: rtl; }
html[dir="rtl"] .wa-float { right: auto; left: 20px; }
html[dir="rtl"] .spec-table th, html[dir="rtl"] .spec-table td { text-align: right; }
html[dir="rtl"] .detail__h2 { border-left: 0; border-right: 3px solid var(--accent); padding-left: 0; padding-right: 12px; }
html[dir="rtl"] .scene-list { padding-left: 0; padding-right: 20px; }
html[dir="rtl"] .strength li { padding-left: 0; padding-right: 26px; }
html[dir="rtl"] .strength li::before { left: auto; right: 0; }
html[dir="rtl"] .info-row { flex-direction: row-reverse; }
html[dir="rtl"] .back-link { direction: rtl; }

/* ---------- 响应式 ---------- */
@media (max-width: 920px) {
  .grid-3, .cases__grid { grid-template-columns: repeat(2, 1fr); }
  .detail, .contact-grid, .grid-2 { grid-template-columns: 1fr; }
  .nav__menu {
    position: absolute; top: 64px; left: 0; right: 0;
    flex-direction: column; align-items: flex-start; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--border); padding: 10px 22px;
    display: none;
  }
  .nav__menu.is-open { display: flex; }
  .nav__menu a { padding: 12px 0; width: 100%; border-bottom: 1px solid var(--border); }
  .nav__toggle { display: block; }
  .nav__right .lang { order: -1; }
}
@media (max-width: 560px) {
  .grid-3, .cases__grid { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
  .hero__inner { padding: 80px 0 70px; }
  .wa-float__text { max-width: 160px; }
}