/* ==========================================================================
   山东景途启扬网络技术服务有限公司 · 官网样式
   Author: 木曜.AIE.Agent
   设计基调：深海军蓝 + 品牌蓝 + 青绿点缀（AI / 科技感，企业级稳重）
   ========================================================================== */

:root {
  --navy: #071634;
  --navy-2: #0E2450;
  --navy-3: #16305F;
  --brand: #2E6BFF;
  --brand-2: #5B8CFF;
  --accent: #17D1A8;
  --accent-2: #57E8C4;

  --bg: #ffffff;
  --bg-soft: #F5F8FF;
  --line: #E3EAF7;
  --line-dark: rgba(255, 255, 255, .12);

  --text: #16233D;
  --muted: #5C6B88;
  --muted-dark: rgba(255, 255, 255, .68);

  --radius: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 2px 10px rgba(16, 35, 74, .06);
  --shadow: 0 12px 32px rgba(16, 35, 74, .10);
  --shadow-lg: 0 26px 60px rgba(9, 25, 60, .18);
  --max: 1180px;

  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
          "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans SC", sans-serif;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  margin: 0;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0; line-height: 1.3; letter-spacing: -.01em; font-weight: 700; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 3px; border-radius: 4px; }

/* ---------- Layout ---------- */
.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 22px; }
.section { padding: 88px 0; }
.section--soft { background: var(--bg-soft); }
.section--dark { background: var(--navy); color: #fff; position: relative; overflow: hidden; }
.section-head { max-width: 760px; margin: 0 auto 52px; text-align: center; }
.section-head--left { margin-left: 0; text-align: left; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 700; letter-spacing: .14em;
  color: var(--brand); text-transform: uppercase; margin-bottom: 14px;
}
.section--dark .eyebrow { color: var(--accent); }
.eyebrow::before { content: ""; width: 22px; height: 2px; background: currentColor; border-radius: 2px; }
h2.section-title { font-size: clamp(26px, 3.4vw, 40px); }
.section-sub { margin-top: 16px; color: var(--muted); font-size: 16.5px; }
.section--dark .section-sub { color: var(--muted-dark); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 14px 28px; border-radius: 999px;
  font-size: 15.5px; font-weight: 600; white-space: nowrap;
  transition: transform .18s ease, box-shadow .22s ease, background .22s ease, color .22s ease;
}
.btn--primary {
  background: linear-gradient(120deg, var(--brand), #1B4FD8);
  color: #fff; box-shadow: 0 10px 26px rgba(46, 107, 255, .32);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 16px 34px rgba(46, 107, 255, .42); }
.btn--accent {
  background: linear-gradient(120deg, var(--accent), #0FB795);
  color: #04231C; font-weight: 700;
  box-shadow: 0 10px 26px rgba(23, 209, 168, .3);
}
.btn--accent:hover { transform: translateY(-2px); box-shadow: 0 16px 34px rgba(23, 209, 168, .42); }
.btn--ghost { border: 1.5px solid var(--line); color: var(--text); background: #fff; }
.btn--ghost:hover { border-color: var(--brand); color: var(--brand); transform: translateY(-2px); }
.btn--onDark { border: 1.5px solid var(--line-dark); color: #fff; background: rgba(255,255,255,.06); }
.btn--onDark:hover { background: rgba(255,255,255,.14); transform: translateY(-2px); }

/* ---------- Header ---------- */
.header {
  position: sticky; top: 0; z-index: 90;
  background: rgba(255, 255, 255, .82);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s ease, box-shadow .25s ease;
}
.header.is-stuck { border-bottom-color: var(--line); box-shadow: 0 6px 22px rgba(16, 35, 74, .06); }
.header .wrap { display: flex; align-items: center; gap: 26px; height: 74px; }

.logo { display: flex; align-items: center; gap: 11px; flex-shrink: 0; }
.logo__mark { width: 40px; height: 40px; flex-shrink: 0; display: block; object-fit: contain; }
.logo__text { display: flex; flex-direction: column; line-height: 1.2; }
.logo__name { font-size: 16.5px; font-weight: 800; letter-spacing: -.02em; }
.logo__tag { font-size: 11px; font-weight: 600; color: var(--muted); letter-spacing: .1em; }

.nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav a {
  padding: 9px 15px; border-radius: 9px; font-size: 15px; font-weight: 500;
  color: var(--muted); transition: color .18s ease, background .18s ease;
}
.nav a:hover { color: var(--text); background: var(--bg-soft); }
.nav a.is-active { color: var(--brand); font-weight: 600; }
.header__cta { display: flex; align-items: center; gap: 12px; }
.header__tel {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 15px; font-weight: 700; color: var(--navy); font-variant-numeric: tabular-nums;
}
.header__tel svg { width: 17px; height: 17px; color: var(--brand); }
.header .btn { padding: 11px 20px; font-size: 14.5px; }

.burger { display: none; width: 42px; height: 42px; border-radius: 10px; border: 1px solid var(--line); }
.burger span { display: block; width: 18px; height: 2px; margin: 4px auto; background: var(--text); border-radius: 2px; transition: .22s; }
.burger.is-open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.burger.is-open span:nth-child(2) { opacity: 0; }
.burger.is-open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.drawer {
  display: none; position: fixed; inset: 74px 0 auto; z-index: 89;
  background: #fff; border-bottom: 1px solid var(--line);
  padding: 14px 22px 22px; box-shadow: var(--shadow);
}
.drawer.is-open { display: block; }
.drawer a { display: block; padding: 13px 4px; font-size: 16px; font-weight: 600; border-bottom: 1px solid var(--line); }
.drawer .btn { width: 100%; margin-top: 16px; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden; color: #fff;
  background: radial-gradient(1200px 620px at 78% -8%, #1C3F8F 0%, transparent 62%),
              radial-gradient(760px 480px at 6% 108%, #0B4E63 0%, transparent 60%),
              linear-gradient(160deg, #071634 0%, #0A1E44 54%, #071634 100%);
}
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 58px 58px;
  mask-image: radial-gradient(circle at 50% 34%, #000 30%, transparent 78%);
  -webkit-mask-image: radial-gradient(circle at 50% 34%, #000 30%, transparent 78%);
}
.hero .wrap { position: relative; z-index: 1; display: grid; grid-template-columns: 1.06fr .94fr; gap: 58px; align-items: center; padding-top: 84px; padding-bottom: 96px; }

.hero__badge {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 7px 15px 7px 11px; border-radius: 999px;
  background: rgba(23, 209, 168, .12); border: 1px solid rgba(23, 209, 168, .34);
  color: var(--accent-2); font-size: 13.5px; font-weight: 600; margin-bottom: 22px;
}
.hero__badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px rgba(23,209,168,.22); }

.hero h1 { font-size: clamp(32px, 4.5vw, 54px); letter-spacing: -.025em; }
.hero h1 em {
  font-style: normal;
  background: linear-gradient(100deg, var(--accent-2), var(--brand-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero__lead { margin-top: 22px; font-size: 17.5px; line-height: 1.85; color: var(--muted-dark); max-width: 560px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }

.hero__trust {
  display: flex; flex-wrap: wrap; gap: 30px; margin-top: 44px;
  padding-top: 26px; border-top: 1px solid var(--line-dark);
}
.hero__trust div b { display: block; font-size: 26px; font-weight: 800; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.hero__trust div b i { font-style: normal; color: var(--accent); }
.hero__trust div span { font-size: 13.5px; color: var(--muted-dark); }

/* Hero 视觉：AI 问答命中示意 */
.ai-mock {
  background: rgba(255,255,255,.055); border: 1px solid var(--line-dark);
  border-radius: var(--radius-lg); padding: 20px; backdrop-filter: blur(10px);
  box-shadow: var(--shadow-lg);
}
.ai-mock__bar { display: flex; align-items: center; gap: 8px; padding-bottom: 15px; border-bottom: 1px solid var(--line-dark); }
.ai-mock__bar i { width: 10px; height: 10px; border-radius: 50%; background: rgba(255,255,255,.22); }
.ai-mock__bar span { margin-left: 8px; font-size: 12.5px; color: var(--muted-dark); letter-spacing: .04em; }
.ai-mock__q {
  margin: 18px 0 14px; padding: 13px 16px; border-radius: 12px 12px 12px 4px;
  background: rgba(46,107,255,.2); border: 1px solid rgba(91,140,255,.34);
  font-size: 14.5px; font-weight: 600;
}
.ai-mock__a {
  padding: 16px; border-radius: 12px; background: rgba(255,255,255,.075);
  border: 1px solid var(--line-dark); font-size: 14px; line-height: 1.85; color: rgba(255,255,255,.86);
}
.ai-mock__a strong { color: #fff; }
.ai-mock__src {
  display: flex; align-items: center; gap: 10px; margin-top: 14px; padding: 11px 14px;
  border-radius: 11px; background: rgba(23,209,168,.12); border: 1px solid rgba(23,209,168,.3);
}
.ai-mock__src b { font-size: 13px; color: var(--accent-2); }
.ai-mock__src small { margin-left: auto; font-size: 12px; color: var(--muted-dark); }
.ai-mock__tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.ai-mock__tags span {
  padding: 5px 11px; border-radius: 999px; font-size: 12.5px;
  background: rgba(255,255,255,.07); border: 1px solid var(--line-dark); color: var(--muted-dark);
}

/* ---------- Cards / Grid ---------- */
.grid { display: grid; gap: 22px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 30px 28px; box-shadow: var(--shadow-sm);
  transition: transform .2s ease, box-shadow .24s ease, border-color .24s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: #CFDDF7; }
.card__icon {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center;
  background: linear-gradient(140deg, rgba(46,107,255,.12), rgba(23,209,168,.14));
  border: 1px solid var(--line); margin-bottom: 20px;
}
.card__icon svg { width: 25px; height: 25px; color: var(--brand); }
.card h3 { font-size: 19.5px; margin-bottom: 11px; }
.card p { color: var(--muted); font-size: 15.3px; }
.card__list { margin-top: 17px; display: grid; gap: 9px; }
.card__list li { position: relative; padding-left: 22px; font-size: 14.6px; color: var(--muted); }
.card__list li::before {
  content: ""; position: absolute; left: 3px; top: 10px;
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 0 3px rgba(23,209,168,.16);
}
.card--num { position: relative; }
.card__n {
  position: absolute; top: 24px; right: 26px;
  font-size: 34px; font-weight: 800; color: rgba(46,107,255,.1); letter-spacing: -.03em;
}

/* ---------- 服务详情块 ---------- */
.svc { display: grid; grid-template-columns: 1fr 1fr; gap: 54px; align-items: center; padding: 46px 0; }
.svc + .svc { border-top: 1px solid var(--line); }
.svc:nth-child(even) .svc__media { order: -1; }
.svc__tag {
  display: inline-block; padding: 5px 13px; border-radius: 999px; font-size: 12.5px; font-weight: 700;
  background: var(--bg-soft); border: 1px solid var(--line); color: var(--brand); margin-bottom: 15px;
}
.svc h3 { font-size: clamp(21px, 2.4vw, 28px); margin-bottom: 14px; }
.svc p { color: var(--muted); font-size: 15.8px; }
.svc__media {
  border-radius: var(--radius-lg); padding: 26px;
  background: linear-gradient(150deg, #0A1B3E, #123063); color: #fff;
  border: 1px solid rgba(255,255,255,.1); box-shadow: var(--shadow);
}
.svc__media ul { display: grid; gap: 12px; }
.svc__media li { display: flex; gap: 11px; font-size: 14.6px; color: rgba(255,255,255,.86); }
.svc__media li svg { width: 18px; height: 18px; color: var(--accent); flex-shrink: 0; margin-top: 4px; }

/* ---------- 数据 ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.stat {
  text-align: center; padding: 30px 18px; border-radius: var(--radius-lg);
  background: rgba(255,255,255,.055); border: 1px solid var(--line-dark);
}
.stat b { display: block; font-size: clamp(30px, 3.6vw, 44px); font-weight: 800; letter-spacing: -.03em; font-variant-numeric: tabular-nums; }
.stat b i { font-style: normal; color: var(--accent); }
.stat span { display: block; margin-top: 7px; font-size: 14px; color: var(--muted-dark); }

/* ---------- 时间线 ---------- */
.timeline { position: relative; max-width: 900px; margin: 0 auto; padding-left: 30px; }
.timeline::before {
  content: ""; position: absolute; left: 7px; top: 8px; bottom: 8px; width: 2px;
  background: linear-gradient(180deg, var(--brand), var(--accent));
  border-radius: 2px; opacity: .35;
}
.tl { position: relative; padding: 0 0 40px 0; }
.tl:last-child { padding-bottom: 0; }
.tl::before {
  content: ""; position: absolute; left: -30px; top: 7px;
  width: 16px; height: 16px; border-radius: 50%;
  background: #fff; border: 3px solid var(--brand); box-shadow: 0 0 0 5px rgba(46,107,255,.12);
}
.tl:last-child::before { border-color: var(--accent); box-shadow: 0 0 0 5px rgba(23,209,168,.16); }
.tl__year { font-size: 13px; font-weight: 800; letter-spacing: .1em; color: var(--brand); }
.tl:last-child .tl__year { color: #0E9E7C; }
.tl h3 { font-size: 19px; margin: 6px 0 10px; }
.tl p { color: var(--muted); font-size: 15.3px; }

/* ---------- FAQ ---------- */
.faq { max-width: 880px; margin: 0 auto; display: grid; gap: 12px; }
.faq details {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 4px 22px; box-shadow: var(--shadow-sm); transition: border-color .2s ease;
}
.faq details[open] { border-color: #CFDDF7; }
.faq summary {
  display: flex; align-items: center; gap: 14px; padding: 16px 0;
  font-size: 16.5px; font-weight: 650; cursor: pointer; list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; margin-left: auto; width: 9px; height: 9px; flex-shrink: 0;
  border-right: 2px solid var(--muted); border-bottom: 2px solid var(--muted);
  transform: rotate(45deg) translateY(-3px); transition: transform .22s ease;
}
.faq details[open] summary::after { transform: rotate(-135deg) translateY(-3px); border-color: var(--brand); }
.faq summary .q {
  width: 26px; height: 26px; flex-shrink: 0; border-radius: 8px; display: grid; place-items: center;
  background: var(--bg-soft); border: 1px solid var(--line); color: var(--brand);
  font-size: 13px; font-weight: 800;
}
.faq .a { padding: 0 0 20px 40px; color: var(--muted); font-size: 15.3px; }
.faq .a strong { color: var(--text); }

/* ---------- 联系 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 54px; align-items: start; }
.contact-list { display: grid; gap: 20px; margin-top: 30px; }
.contact-item { display: flex; gap: 15px; }
.contact-item__ico {
  width: 46px; height: 46px; flex-shrink: 0; border-radius: 13px; display: grid; place-items: center;
  background: linear-gradient(140deg, rgba(46,107,255,.12), rgba(23,209,168,.14));
  border: 1px solid var(--line);
}
.contact-item__ico svg { width: 21px; height: 21px; color: var(--brand); }
.contact-item b { display: block; font-size: 13px; color: var(--muted); font-weight: 600; letter-spacing: .04em; }
.contact-item span { font-size: 17px; font-weight: 700; font-variant-numeric: tabular-nums; }
.contact-item small { display: block; font-size: 13.5px; color: var(--muted); font-weight: 400; margin-top: 3px; }

.form {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 32px; box-shadow: var(--shadow);
}
.form h3 { font-size: 20px; margin-bottom: 6px; }
.form > p { color: var(--muted); font-size: 14.6px; margin-bottom: 22px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13.6px; font-weight: 600; margin-bottom: 7px; color: var(--text); }
.field label i { font-style: normal; color: #E0455B; }
.field input, .field select, .field textarea {
  width: 100%; padding: 12px 15px; font: inherit; font-size: 15px;
  color: var(--text); background: var(--bg-soft);
  border: 1.5px solid var(--line); border-radius: 11px;
  transition: border-color .18s ease, background .18s ease;
}
.field textarea { min-height: 104px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--brand); background: #fff;
}
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form .btn { width: 100%; margin-top: 6px; }
.form__note { margin-top: 14px; font-size: 13px; color: var(--muted); line-height: 1.7; }
.form__note a { color: var(--brand); text-decoration: underline; text-underline-offset: 2px; }
.form__ok {
  display: none; margin-top: 14px; padding: 13px 16px; border-radius: 11px;
  background: rgba(23,209,168,.12); border: 1px solid rgba(23,209,168,.4);
  color: #0B7D62; font-size: 14.3px; font-weight: 600;
}
.form__ok.is-on { display: block; }

/* ---------- CTA 条 ---------- */
.cta-band {
  background: linear-gradient(115deg, #0A1B3E 0%, #14356F 52%, #0C4A57 100%);
  color: #fff; border-radius: var(--radius-lg); padding: 46px 44px;
  display: flex; flex-wrap: wrap; align-items: center; gap: 28px;
  box-shadow: var(--shadow-lg); position: relative; overflow: hidden;
}
.cta-band::after {
  content: ""; position: absolute; right: -80px; top: -80px; width: 300px; height: 300px;
  border-radius: 50%; background: radial-gradient(circle, rgba(23,209,168,.3), transparent 68%);
}
.cta-band h2 { font-size: clamp(22px, 2.6vw, 31px); max-width: 620px; position: relative; z-index: 1; }
.cta-band p { margin-top: 11px; color: var(--muted-dark); font-size: 15.5px; max-width: 620px; position: relative; z-index: 1; }
.cta-band .btn { position: relative; z-index: 1; margin-left: auto; }

/* ---------- Footer ---------- */
.footer { background: var(--navy); color: rgba(255,255,255,.72); padding: 62px 0 0; font-size: 14.6px; }
.footer__top { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 44px; }
.footer__brand .logo { margin-bottom: 16px; }
.footer__brand .logo__name { color: #fff; }
.footer__brand .logo__tag { color: rgba(255,255,255,.5); }
.footer__brand p { font-size: 14px; line-height: 1.85; max-width: 330px; color: rgba(255,255,255,.6); }
.footer h4 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.footer ul { display: grid; gap: 10px; }
.footer ul a { font-size: 14.3px; color: rgba(255,255,255,.68); transition: color .18s ease; }
.footer ul a:hover { color: var(--accent); }
.footer__tel { font-size: 22px; font-weight: 800; color: #fff; letter-spacing: -.01em; font-variant-numeric: tabular-nums; }
.footer__bottom {
  border-top: 1px solid var(--line-dark); padding: 22px 0 30px;
  display: flex; flex-wrap: wrap; gap: 10px 24px; align-items: center;
  font-size: 13.4px; color: rgba(255,255,255,.55);
}
.footer__bottom a { color: rgba(255,255,255,.55); }
.footer__bottom a:hover { color: var(--accent); }
.footer__bottom .sep { opacity: .35; }

/* ---------- 子页 ---------- */
.page-hero {
  background: linear-gradient(160deg, #071634, #0E2450); color: #fff;
  padding: 72px 0 64px; position: relative; overflow: hidden;
}
.page-hero::before {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 58px 58px;
  mask-image: radial-gradient(circle at 24% 40%, #000 20%, transparent 72%);
  -webkit-mask-image: radial-gradient(circle at 24% 40%, #000 20%, transparent 72%);
}
.page-hero .wrap { position: relative; z-index: 1; }
.page-hero h1 { font-size: clamp(27px, 3.6vw, 40px); }
.page-hero p { margin-top: 15px; color: var(--muted-dark); max-width: 720px; font-size: 16.5px; }
.crumb { font-size: 13.6px; color: rgba(255,255,255,.5); margin-bottom: 16px; }
.crumb a:hover { color: var(--accent); }

.prose { max-width: 820px; }
.prose h2 { font-size: 23px; margin: 40px 0 14px; }
.prose h3 { font-size: 18px; margin: 28px 0 10px; }
.prose p { color: var(--muted); margin-bottom: 15px; font-size: 15.6px; }
.prose ul { display: grid; gap: 10px; margin: 0 0 18px; }
.prose ul li { position: relative; padding-left: 22px; color: var(--muted); font-size: 15.4px; }
.prose ul li::before {
  content: ""; position: absolute; left: 3px; top: 10px;
  width: 7px; height: 7px; border-radius: 50%; background: var(--brand);
}
.prose .updated { font-size: 13.6px; color: var(--muted); padding-bottom: 20px; border-bottom: 1px solid var(--line); }

/* ---------- 滚动出现动画 ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s cubic-bezier(.2,.7,.2,1); }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero .wrap { grid-template-columns: 1fr; gap: 46px; padding-top: 60px; padding-bottom: 74px; }
  .hero__lead { max-width: none; }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .svc { grid-template-columns: 1fr; gap: 28px; }
  .svc:nth-child(even) .svc__media { order: 0; }
  .contact-grid { grid-template-columns: 1fr; gap: 38px; }
  .footer__top { grid-template-columns: 1fr 1fr; gap: 34px; }
  .nav { display: none; }
  .burger { display: block; }
  .header__tel { display: none; }
  .header__cta { margin-left: auto; }
  .header .wrap { justify-content: space-between; }
}
@media (max-width: 720px) {
  .section { padding: 62px 0; }
  /* 窄屏收起顶部 CTA 按钮，只留 logo + 汉堡，避免导航行横向溢出
     （菜单里已有全宽「电话咨询」按钮，功能不丢失） */
  .header .btn { display: none; }
  .grid--3, .grid--2 { grid-template-columns: 1fr; }
  .grid--4 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr 1fr; gap: 14px; }
  .stat { padding: 22px 14px; }
  .card { padding: 26px 22px; }
  .cta-band { padding: 34px 24px; }
  .cta-band .btn { margin-left: 0; width: 100%; }
  .footer__top { grid-template-columns: 1fr; gap: 30px; }
  .hero__trust { gap: 20px 26px; }
  .field-row { grid-template-columns: 1fr; }
  .form { padding: 24px; }
  .timeline { padding-left: 26px; }
}