/* =========================================================
   兴陆科技 Xinglu Technology — 企业官网设计系统 (v2 · 移动端 H5 优化)
   品牌色：提取自 Logo — 科技蓝 #0054EA + 能量红 #FF0D0D + 生机绿 #00C000
   ========================================================= */

:root {
  /* 品牌主色 */
  --blue: #0054EA;
  --blue-d: #0039A8;
  --blue-dd: #002C80;
  --blue-soft: #4B83F7;
  --blue-pale: #E8F1FF;
  --blue-ice: #F4F8FF;

  /* 品牌强调色 */
  --red: #FF0D0D;
  --red-d: #D90404;
  --red-pale: #FFF2F2;
  --green: #00C000;
  --green-d: #009900;
  --green-pale: #F0FFF0;

  /* 中性色 */
  --ink: #0E1B2E;
  --ink-2: #3F5168;
  --muted: #6E829A;
  --line: #D9E4F2;
  --bg: #FFFFFF;
  --bg-soft: var(--blue-ice);
  --bg-deep: #021638;
  --gold: #E0A93B;

  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 22px;
  --shadow: 0 10px 30px rgba(0, 52, 148, .08);
  --shadow-lg: 0 20px 50px rgba(0, 52, 148, .16);
  --grad-brand: linear-gradient(120deg, var(--blue) 0%, var(--blue-soft) 100%);
  --grad-accent: linear-gradient(120deg, #7EB3FF 0%, var(--red) 100%);
  --maxw: 1200px;
  --nav-h: 68px;
  --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans CN", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 84px; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* 统一的可见焦点（键盘可达性） */
:focus-visible { outline: 3px solid var(--blue-soft); outline-offset: 3px; border-radius: 6px; }

/* ---------- 顶部滚动进度条 ---------- */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0%;
  background: linear-gradient(90deg, var(--blue) 0%, var(--red) 100%);
  z-index: 200; transition: width .12s linear; pointer-events: none;
}

/* ---------- Typography helpers ---------- */
.section { padding: 92px 0; position: relative; }
.section.soft {
  background:
    radial-gradient(760px 320px at 100% 0%, var(--blue-pale), transparent 62%),
    var(--bg-soft);
}
.section.deep {
  background:
    radial-gradient(900px 420px at 12% 0%, rgba(0,84,234,.32), transparent 60%),
    var(--bg-deep);
  color: #E9F0FF;
}
.section-head { max-width: 760px; margin: 0 auto 54px; text-align: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px; font-size: 13px; letter-spacing: 3px;
  font-weight: 800; color: var(--red); text-transform: uppercase; margin-bottom: 16px;
}
.eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--red); }
.section-title { font-size: 34px; font-weight: 800; letter-spacing: .5px; color: var(--ink); line-height: 1.25; }
.section-title::after {
  content: ""; display: block; width: 56px; height: 4px; border-radius: 4px;
  margin: 18px auto 0; background: var(--grad-accent);
}
.section-head .section-title::after { margin-left: auto; margin-right: auto; }
.section.deep .section-title { color: #fff; }
.section.deep .section-title::after { background: linear-gradient(90deg, #7EB3FF, var(--red)); }
.section-sub { margin-top: 16px; color: var(--ink-2); font-size: 16px; }
.section.deep .section-sub { color: #A9BFD9; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 28px; border-radius: 999px; font-weight: 700; font-size: 15px;
  cursor: pointer; border: 2px solid transparent; transition: all .22s ease; white-space: nowrap;
}
.btn-primary { background: var(--red); color: #fff; box-shadow: 0 10px 24px rgba(255,13,13,.28); }
.btn-primary:hover { background: var(--red-d); transform: translateY(-2px); box-shadow: 0 14px 30px rgba(255,13,13,.34); }
.btn-ghost { background: transparent; color: var(--blue); border-color: var(--blue); }
.btn-ghost:hover { background: var(--blue); color: #fff; }
.btn-light { background: #fff; color: var(--blue); }
.btn-light:hover { background: var(--blue-pale); transform: translateY(-2px); }
.btn-outline-light { background: rgba(255,255,255,.08); color: #fff; border-color: rgba(255,255,255,.55); }
.btn-outline-light:hover { background: rgba(255,255,255,.18); border-color: #fff; }

/* ---------- Top nav ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,.86); backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent; transition: box-shadow .25s ease, border-color .25s ease, background .25s ease;
}
.nav.scrolled { box-shadow: 0 6px 24px rgba(0,52,148,.10); border-bottom-color: var(--line); background: rgba(255,255,255,.94); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: var(--nav-h); }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 19px; color: var(--blue); letter-spacing: .5px; line-height: 1.1; }
.brand .logo-img { height: 38px; width: auto; display: block; }
.footer .brand .logo-img { height: 28px; filter: brightness(0) invert(1); }
.brand small { display: block; margin-top: 2px; font-size: 10.5px; font-weight: 600; color: var(--muted); letter-spacing: .8px; }
.footer .brand small { color: #93A9C8; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  padding: 9px 15px; border-radius: 9px; font-size: 15px; font-weight: 600; color: var(--ink-2);
  transition: all .18s ease;
}
.nav-links a:hover { color: var(--blue); background: var(--bg-soft); }
.nav-links a.active { color: var(--blue); background: var(--blue-pale); }
.nav-phone { margin-left: 8px; font-weight: 700; font-size: 16px; color: var(--blue); white-space: nowrap; }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 9px; border-radius: 10px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--blue); margin: 5px 0; border-radius: 2px; transition: .25s; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden; color: #fff; padding: 156px 0 100px;
  background:
    radial-gradient(1200px 600px at 82% -12%, var(--blue) 0%, transparent 58%),
    linear-gradient(158deg, var(--bg-deep) 0%, var(--blue-dd) 52%, var(--blue-d) 100%);
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255,255,255,.12) 1.4px, transparent 1.4px);
  background-size: 26px 26px; opacity: .5;
  -webkit-mask-image: radial-gradient(720px 420px at 70% 30%, #000 0%, transparent 78%);
          mask-image: radial-gradient(720px 420px at 70% 30%, #000 0%, transparent 78%);
}
.hero::after {
  content: ""; position: absolute; right: -150px; top: 70px; width: 460px; height: 460px; border-radius: 50%;
  background: radial-gradient(circle, rgba(255,13,13,.34), transparent 62%); filter: blur(8px);
  animation: floatGlow 9s ease-in-out infinite;
}
@keyframes floatGlow { 0%,100% { transform: translateY(0) } 50% { transform: translateY(-22px) } }
.hero-grid { position: relative; z-index: 2; display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: center; }
.hero-tag {
  display: inline-flex; align-items: center; gap: 9px; padding: 8px 17px; border-radius: 999px;
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.20); font-size: 13px; font-weight: 600; color: #D0E4FF; margin-bottom: 24px;
}
.hero-tag i { width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px rgba(0,192,0,.25); }
.hero h1 { font-size: 47px; line-height: 1.22; font-weight: 900; letter-spacing: 1px; }
.hero h1 .accent { background: linear-gradient(120deg, #9CC4FF 0%, #FF8A8A 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero h1 .line { display: block; }
.hero p.lead { margin-top: 22px; font-size: 18px; color: #C4DAF5; max-width: 540px; }
.hero-actions { margin-top: 34px; display: flex; gap: 14px; flex-wrap: wrap; }
.hero-pills { margin-top: 38px; display: flex; flex-wrap: wrap; gap: 10px; }
.hero-pills span {
  font-size: 13px; padding: 7px 14px; border-radius: 999px; background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.14); color: #D7E9FF;
}

/* Hero side card */
.hero-card {
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.16); border-radius: 20px;
  padding: 28px; backdrop-filter: blur(6px); position: relative; overflow: hidden;
}
.hero-card::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px; background: var(--grad-accent); }
.hero-card h3 { font-size: 15px; color: #BDD7F5; font-weight: 700; letter-spacing: 1px; margin-bottom: 16px; }
.hero-card .kv { display: flex; justify-content: space-between; gap: 12px; padding: 11px 0; border-bottom: 1px dashed rgba(255,255,255,.14); font-size: 14px; }
.hero-card .kv:last-child { border-bottom: none; }
.hero-card .kv b { color: #fff; font-weight: 700; }
.hero-card .kv span { color: #AACCF2; text-align: right; }

/* ---------- Stats bar ---------- */
.stats { background: var(--grad-brand); color: #fff; position: relative; overflow: hidden; }
.stats::before { content: ""; position: absolute; inset: 0; background-image: radial-gradient(rgba(255,255,255,.12) 1.2px, transparent 1.2px); background-size: 22px 22px; opacity: .35; }
.stats-grid { position: relative; display: grid; grid-template-columns: repeat(5, 1fr); }
.stat { text-align: center; padding: 40px 16px; border-right: 1px solid rgba(255,255,255,.16); }
.stat:last-child { border-right: none; }
.stat .num { font-size: 42px; font-weight: 900; line-height: 1; color: #fff; }
.stat .num .u { font-size: 20px; color: #C9E0FF; margin-left: 2px; }
.stat .lab { margin-top: 10px; font-size: 14px; color: #D2E4FF; letter-spacing: .5px; }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: start; }
.about-lead p { color: var(--ink-2); margin-bottom: 18px; font-size: 16px; }
.about-lead p strong { color: var(--ink); }
.about-tags { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 26px; }
.about-tags span { font-size: 13px; padding: 8px 15px; background: var(--bg-soft); border: 1px solid var(--line); border-radius: 8px; color: var(--blue); font-weight: 600; }
.mvv { display: grid; gap: 16px; }
.mvv-card { background: #fff; border: 1px solid var(--line); border-left: 4px solid var(--red); border-radius: var(--radius-sm); padding: 22px 24px; box-shadow: var(--shadow); transition: transform .25s ease, box-shadow .25s ease; }
.mvv-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.mvv-card .mk { font-size: 13px; font-weight: 800; letter-spacing: 2px; color: var(--red); }
.mvv-card h4 { font-size: 19px; margin: 6px 0 8px; color: var(--blue); }
.mvv-card p { color: var(--ink-2); font-size: 15px; }
.vals { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 4px; }
.val { display: inline-flex; align-items: center; padding: 8px 16px; border-radius: 999px; font-size: 14.5px; font-weight: 700; color: var(--blue); background: var(--bg-soft); border: 1px solid var(--line); transition: all .2s ease; }
.val:hover { background: var(--blue); color: #fff; border-color: var(--blue); }

/* ---------- Cards grid (generic) ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px 24px; transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
  position: relative; overflow: hidden;
}
.card::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 3px; background: var(--grad-brand); transform: scaleX(0); transform-origin: left; transition: transform .3s ease; }
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--blue-pale); }
.card:hover::after { transform: scaleX(1); }
.card .ic {
  width: 54px; height: 54px; border-radius: 14px; display: grid; place-items: center;
  background: var(--grad-brand); color: #fff; margin-bottom: 16px; box-shadow: 0 8px 18px rgba(0,84,234,.22);
}
.card .ic svg { width: 27px; height: 27px; }
.card h4 { font-size: 18px; color: var(--blue); margin-bottom: 8px; }
.card p.desc { color: var(--ink-2); font-size: 14.5px; margin-bottom: 14px; }
.card ul.feat { display: grid; gap: 7px; }
.card ul.feat li { font-size: 14px; color: var(--ink-2); padding-left: 18px; position: relative; }
.card ul.feat li::before { content: ""; position: absolute; left: 0; top: 10px; width: 6px; height: 6px; border-radius: 2px; background: var(--red); }

/* ---------- Solutions ---------- */
.sol-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.sol {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px 22px;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease; cursor: default;
}
.sol:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: var(--blue-pale); }
.sol .top { display: flex; align-items: center; gap: 14px; margin-bottom: 16px; }
.sol .no {
  flex: none; width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center;
  font-size: 18px; font-weight: 900; color: #fff; background: var(--grad-brand); box-shadow: 0 6px 14px rgba(0,84,234,.22);
}
.sol h4 { font-size: 17.5px; color: var(--blue); line-height: 1.35; }
.sol .rows { display: grid; gap: 11px; }
.sol .row { font-size: 14px; }
.sol .row .k { display: inline-block; font-size: 11.5px; font-weight: 800; letter-spacing: 1px; color: var(--red); margin-bottom: 2px; }
.sol .row .v { color: var(--ink-2); display: block; }

/* ---------- Capabilities ---------- */
.cap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.cap {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 24px;
  transition: transform .25s ease, box-shadow .25s ease; position: relative; overflow: hidden;
}
.cap::before { content: ""; position: absolute; right: -30px; top: -30px; width: 90px; height: 90px; border-radius: 50%; background: var(--blue-pale); opacity: 0; transition: opacity .3s ease; }
.cap:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.cap:hover::before { opacity: 1; }
.cap .ic { width: 48px; height: 48px; border-radius: 12px; background: var(--bg-soft); display: grid; place-items: center; margin-bottom: 14px; color: var(--blue); position: relative; }
.cap h4 { font-size: 18px; color: var(--blue); margin-bottom: 10px; }
.cap p { font-size: 14.5px; color: var(--ink-2); position: relative; }

/* standards table */
.table-card { margin-top: 44px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.table-card h4 { padding: 20px 24px; font-size: 18px; color: var(--blue); border-bottom: 1px solid var(--line); background: var(--bg-soft); }
.tbl { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.tbl thead th { background: var(--blue); color: #fff; text-align: left; padding: 14px 18px; font-weight: 700; font-size: 13.5px; letter-spacing: .5px; }
.tbl tbody td { padding: 13px 18px; border-bottom: 1px solid var(--line); color: var(--ink-2); }
.tbl tbody tr:nth-child(even) { background: var(--blue-ice); }
.tbl tbody tr:last-child td { border-bottom: none; }
.tbl tbody tr { transition: background .15s ease; }
.tbl tbody tr:hover { background: var(--blue-pale); }
.tbl .code { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; color: var(--blue); font-weight: 600; }
.tbl .lv { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 700; }
.lv.gb { background: var(--red-pale); color: var(--red-d); }
.lv.tt { background: var(--blue-pale); color: var(--blue-d); }
.lv.df { background: var(--green-pale); color: var(--green-d); }

/* ---------- Qualifications ---------- */
.qual-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.qual {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 22px 18px;
  text-align: center; transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}
.qual:hover { border-color: var(--blue); box-shadow: var(--shadow); transform: translateY(-4px); }
.qual .badge {
  width: 52px; height: 52px; margin: 0 auto 13px; border-radius: 50%; display: grid; place-items: center;
  background: var(--grad-brand); color: #fff; font-size: 20px; font-weight: 800; box-shadow: 0 8px 18px rgba(0,84,234,.22);
}
.qual h5 { font-size: 15px; color: var(--ink); font-weight: 700; }
.qual p { font-size: 12.5px; color: var(--muted); margin-top: 5px; }

/* ---------- Clients ---------- */
.clients-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.clients-text p { color: #C4DAF5; font-size: 16px; }
.clients-chips { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }
.clients-chips span {
  padding: 11px 18px; border-radius: 10px; background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.16); color: #E6F0FF; font-weight: 600; font-size: 14.5px;
  transition: all .2s ease;
}
.clients-chips span:hover { background: rgba(255,255,255,.16); }
.clients-mini { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.cmini { background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.14); border-radius: 16px; padding: 22px; transition: transform .22s ease, background .22s ease; }
.cmini:hover { transform: translateY(-4px); background: rgba(255,255,255,.12); }
.cmini .n { font-size: 30px; font-weight: 900; color: #fff; }
.cmini .n .u { font-size: 16px; color: #7EB3FF; }
.cmini .l { font-size: 13px; color: #AACCF2; margin-top: 6px; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: minmax(0, 760px); justify-content: center; gap: 0; }
.contact-info { background: #fff; border-radius: var(--radius); padding: 34px; box-shadow: var(--shadow); border: 1px solid var(--line); }
.contact-info h3 { font-size: 22px; color: var(--blue); margin-bottom: 20px; }
.ci-row { display: flex; gap: 14px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.ci-row:last-child { border-bottom: none; }
.ci-row .ic { flex: none; width: 42px; height: 42px; border-radius: 11px; background: var(--bg-soft); color: var(--blue); display: grid; place-items: center; }
.ci-row .t { font-size: 13px; color: var(--muted); }
.ci-row .v { font-size: 15.5px; color: var(--ink); font-weight: 600; }
.ci-row .v a[href^="tel:"] { color: var(--red); }

/* ---------- Footer ---------- */
.footer { background: var(--bg-deep); color: #A9BFD9; padding: 58px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 36px; }
.footer .brand { color: #fff; margin-bottom: 16px; }
.footer p.fdesc { font-size: 14px; color: #93A9C8; max-width: 320px; }
.footer h6 { color: #fff; font-size: 15px; margin-bottom: 16px; letter-spacing: .5px; }
.footer ul li { margin-bottom: 10px; }
.footer ul li a { font-size: 14px; color: #A9BFD9; transition: color .2s; }
.footer ul li a:hover { color: #fff; }
.footer-bottom { margin-top: 40px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.10); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; font-size: 13px; color: #8298B8; }
.footer-beian { display: flex; gap: 18px; flex-wrap: wrap; justify-content: center; margin-top: 16px; padding-top: 16px; border-top: 1px dashed rgba(255,255,255,.08); font-size: 12px; color: #6E84A8; }
.footer-beian a { color: #6E84A8; text-decoration: none; transition: color .2s ease; }
.footer-beian a:hover { color: #fff; }

/* ---------- 移动端底部固定 CTA（H5） ---------- */
.mcta {
  display: none; position: fixed; left: 0; right: 0; bottom: 0; z-index: 120;
  padding: 10px 14px calc(10px + env(safe-area-inset-bottom, 0px));
  background: rgba(255,255,255,.96); backdrop-filter: blur(12px);
  border-top: 1px solid var(--line); box-shadow: 0 -8px 24px rgba(0,52,148,.10);
  gap: 10px; align-items: center;
}
.mcta-phone {
  flex: 1; height: 50px; border-radius: 13px; background: var(--red); color: #fff;
  display: flex; align-items: center; justify-content: center; gap: 8px;
  font-size: 17px; font-weight: 800; letter-spacing: .5px;
  box-shadow: 0 8px 20px rgba(255,13,13,.30);
}
.mcta-phone svg { width: 20px; height: 20px; }
.mcta-phone:hover { background: var(--red-d); }
.mcta-top {
  flex: none; width: 50px; height: 50px; border-radius: 13px; background: var(--blue-pale);
  color: var(--blue); display: grid; place-items: center;
}
.mcta-top svg { width: 22px; height: 22px; }

/* ---------- Reveal animation ---------- */
/* 仅当 JS 可用时隐藏，确保禁用 JS / 爬虫也能看到全部内容（SEO / GEO 可达性） */
.js .reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.js .reveal.in { opacity: 1; transform: none; }

/* ---------- FAQ ---------- */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.faq {
  background: #fff; border: 1px solid var(--line); border-left: 4px solid var(--blue);
  border-radius: var(--radius-sm); padding: 22px 26px; box-shadow: var(--shadow);
  transition: transform .22s ease, box-shadow .22s ease;
}
.faq:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.faq .q { font-size: 17px; color: var(--blue); margin-bottom: 9px; line-height: 1.4; }
.faq .a { color: var(--ink-2); font-size: 14.5px; }
.faq .a a { font-weight: 700; }

/* =========================================================
   响应式 — 移动优先（820px 起启用 H5 布局，触控目标 ≥16px 防 iOS 缩放）
   ========================================================= */
@media (max-width: 1024px) {
  .section { padding: 76px 0; }
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero-card { display: none; }
  .about-grid, .clients-wrap { grid-template-columns: 1fr; gap: 40px; }
  .grid-3, .sol-grid, .cap-grid { grid-template-columns: repeat(2, 1fr); }
  .qual-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: repeat(3, 1fr); }
  .stat:nth-child(3) { border-right: none; }
  .hero h1 { font-size: 40px; }
}

@media (max-width: 820px) {
  :root { --nav-h: 60px; }
  /* 移动端导航：汉堡菜单 + 下拉 */
  .nav-links {
    display: none; position: absolute; top: var(--nav-h); left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 2px;
    background: #fff; padding: 10px 16px 18px; box-shadow: var(--shadow-lg);
    border-top: 1px solid var(--line); max-height: calc(100vh - var(--nav-h)); overflow-y: auto;
  }
  .nav-links.open { display: flex; }
  .nav-links a {
    font-size: 16px; padding: 14px 12px; border-radius: 10px; min-height: 48px;
    display: flex; align-items: center; border-bottom: 1px solid var(--bg-soft);
  }
  .nav-links a:last-child { border-bottom: none; }
  .nav-toggle { display: block; }
  .nav-phone { font-size: 16px; }

  /* 单列 H5 布局 */
  .grid-3, .sol-grid, .cap-grid { grid-template-columns: 1fr; }
  .qual-grid { grid-template-columns: repeat(2, 1fr); }
  .clients-mini { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat { border-right: none; border-bottom: 1px solid rgba(255,255,255,.16); padding: 30px 16px; }
  .stat:nth-child(odd) { border-right: 1px solid rgba(255,255,255,.16); }
  .stat:nth-child(5) { border-bottom: none; }

  /* 触控目标 ≥16px（防 iOS 聚焦缩放） */
  .btn { font-size: 16px; padding: 15px 26px; }
  .hero-actions .btn { flex: 1; }

  /* 显示移动端底部 CTA */
  .mcta { display: flex; }
  .footer { padding-bottom: 96px; }
  .section { padding: 64px 0; }

  .hero { padding: 122px 0 76px; }
  .hero h1 { font-size: 34px; }
  .hero p.lead { font-size: 16px; }
  .section-title { font-size: 27px; }
  .wrap { padding: 0 18px; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .stat { border-right: none !important; border-bottom: 1px solid rgba(255,255,255,.16); padding: 26px 16px; }
  .stat:last-child { border-bottom: none; }
  .qual-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .clients-mini { grid-template-columns: 1fr; }
  .hero h1 { font-size: 29px; }
  .section-title { font-size: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .contact-info { padding: 26px 20px; }
  .wrap { padding: 0 16px; }
  .hero-pills span { font-size: 12px; padding: 6px 12px; }
  .faq-list { grid-template-columns: 1fr; }
}

/* 尊重用户的减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .js .reveal { opacity: 1 !important; transform: none !important; }
}