/* ==========================================================================
   大城县屹远节能科技有限公司 · 官网样式
   白底 + 深蓝主色，简洁商务。所有尺寸均为响应式，移动端优先兼容。
   ========================================================================== */

:root {
  --navy: #0b2a4a;
  --navy-700: #123c66;
  --navy-600: #1b5189;
  --blue: #1f6fb2;
  --gold: #d9a441;
  --ink: #16212e;
  --muted: #5c6c80;
  --line: #e3e9f1;
  --soft: #f5f8fb;
  --white: #fff;
  --radius: 12px;
  --shadow-sm: 0 1px 2px rgba(11, 42, 74, .06), 0 6px 18px rgba(11, 42, 74, .05);
  --shadow-md: 0 2px 6px rgba(11, 42, 74, .07), 0 18px 40px rgba(11, 42, 74, .10);
  --wrap: 1180px;
  --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans SC",
    "Noto Sans SC", "WenQuanYi Micro Hei", system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; display: block; }
img { height: auto; }
a { color: var(--navy-600); text-decoration: none; }
a:hover { color: var(--blue); }
h1, h2, h3, h4 { margin: 0 0 .6em; line-height: 1.3; font-weight: 700; letter-spacing: .01em; }
p { margin: 0 0 1em; }
ul { margin: 0; padding: 0; list-style: none; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip {
  position: absolute; left: -999px; top: 0; z-index: 100;
  background: var(--navy); color: #fff; padding: 10px 16px; border-radius: 0 0 8px 0;
}
.skip:focus { left: 0; color: #fff; }

/* ---------- 顶部导航 ---------- */
.site-head {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .94);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .25s ease;
}
.site-head.is-stuck { box-shadow: 0 8px 24px rgba(11, 42, 74, .08); }
.head-inner { display: flex; align-items: center; gap: 28px; height: 74px; }

.brand { display: flex; align-items: center; gap: 11px; flex: 0 0 auto; color: var(--navy); }
.brand:hover { color: var(--navy); }
.brand img { width: 40px; height: 40px; border-radius: 9px; }
.brand-txt { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-size: 17px; font-weight: 700; letter-spacing: .02em; }
.brand-sub { font-size: 11px; color: var(--muted); letter-spacing: .12em; }

.nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav a {
  display: block; padding: 9px 14px; border-radius: 8px;
  font-size: 15px; color: var(--ink); font-weight: 500;
}
.nav a:hover { background: var(--soft); color: var(--navy); }
.nav a[aria-current="page"] { color: var(--navy); font-weight: 700; background: var(--soft); }

.head-cta { display: flex; align-items: center; gap: 10px; }
.head-phone {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 700; color: var(--navy); font-size: 15px; white-space: nowrap;
}
.head-phone svg { width: 17px; height: 17px; }

.nav-toggle {
  display: none; margin-left: auto; width: 44px; height: 44px;
  border: 1px solid var(--line); border-radius: 10px; background: #fff; cursor: pointer;
  align-items: center; justify-content: center;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ""; display: block; width: 18px; height: 2px; background: var(--navy); border-radius: 2px;
  position: relative; transition: transform .2s ease;
}
.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after { position: absolute; top: 6px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after { transform: translateY(-6px) rotate(-45deg); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 26px; border-radius: 10px; font-size: 15px; font-weight: 600;
  border: 1px solid transparent; cursor: pointer; transition: all .2s ease; white-space: nowrap;
}
.btn-primary { background: var(--navy); color: #fff; box-shadow: 0 6px 18px rgba(11, 42, 74, .18); }
.btn-primary:hover { background: var(--navy-600); color: #fff; transform: translateY(-1px); }
.btn-ghost { background: #fff; color: var(--navy); border-color: #cfd9e5; }
.btn-ghost:hover { border-color: var(--navy-600); color: var(--navy); background: var(--soft); }
.btn-light { background: rgba(255, 255, 255, .12); color: #fff; border-color: rgba(255, 255, 255, .38); }
.btn-light:hover { background: rgba(255, 255, 255, .22); color: #fff; }
.btn-sm { padding: 9px 18px; font-size: 14px; }
.btn svg { width: 16px; height: 16px; }

/* 深色背景上的主按钮：反白，保证对比度 */
.hero .btn-primary,
.cta-band .btn-primary {
  background: #fff; color: var(--navy); box-shadow: 0 10px 26px rgba(0, 0, 0, .22);
}
.hero .btn-primary:hover,
.cta-band .btn-primary:hover { background: #eef4fa; color: var(--navy); }

/* ---------- 首屏 ---------- */
.hero {
  position: relative; overflow: hidden; color: #fff;
  background:
    radial-gradient(900px 460px at 78% -8%, rgba(47, 130, 196, .38), transparent 62%),
    radial-gradient(700px 420px at 6% 108%, rgba(20, 78, 128, .55), transparent 60%),
    linear-gradient(160deg, #0a233c 0%, #0b2a4a 42%, #0e3357 100%);
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .5;
  background-image:
    linear-gradient(rgba(255, 255, 255, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .05) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(70% 70% at 50% 40%, #000 20%, transparent 100%);
  -webkit-mask-image: radial-gradient(70% 70% at 50% 40%, #000 20%, transparent 100%);
}
.hero-inner { position: relative; z-index: 1; padding: 78px 0 0; }
.hero-grid {
  display: grid; grid-template-columns: 1.04fr .96fr; gap: 60px;
  align-items: center; padding-bottom: 58px;
}
.hero .eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 13px; letter-spacing: .18em; color: #f0c469; font-weight: 600; margin-bottom: 22px;
}
.hero .eyebrow::before { content: ""; width: 26px; height: 2px; background: #f0c469; display: block; }
.hero h1 {
  font-size: clamp(30px, 4.4vw, 52px); line-height: 1.24; letter-spacing: .01em;
  max-width: 17em; margin-bottom: 22px; font-weight: 800;
}
.hero h1 em { font-style: normal; color: #f0c469; }
.hero .lead {
  font-size: clamp(15px, 1.5vw, 18px); color: rgba(233, 241, 249, .86);
  max-width: 40em; margin-bottom: 34px;
}
.hero .btn-row { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 0; }

/* 首屏材料样张 */
.material-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.material-grid figure {
  margin: 0; position: relative; aspect-ratio: 1 / 1; border-radius: 14px; overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .18);
  box-shadow: 0 22px 48px rgba(0, 0, 0, .34);
  background: #0d2b46;
}
.material-grid img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.material-grid figure:hover img { transform: scale(1.05); }
.material-grid figcaption {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 34px 14px 12px;
  font-size: 13px; font-weight: 600; color: #fff; letter-spacing: .05em;
  background: linear-gradient(transparent, rgba(5, 22, 38, .86));
}
.material-grid figcaption span { display: block; font-size: 11px; font-weight: 400; color: rgba(226, 238, 249, .7); letter-spacing: .08em; margin-top: 1px; }

.stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
  border-top: 1px solid rgba(255, 255, 255, .16);
}
.stat { padding: 26px 24px 34px; border-right: 1px solid rgba(255, 255, 255, .10); }
.stat:last-child { border-right: 0; }
.stat b {
  display: block; font-size: clamp(24px, 2.6vw, 32px); font-weight: 800; color: #fff;
  line-height: 1.2; margin-bottom: 4px;
}
.stat b small { font-size: .55em; font-weight: 600; margin-left: 2px; color: #f0c469; }
.stat span { font-size: 13.5px; color: rgba(226, 237, 247, .72); letter-spacing: .04em; }

/* ---------- 通用区块 ---------- */
.section { padding: 88px 0; }
.section--soft { background: var(--soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.sec-head { max-width: 720px; margin-bottom: 48px; }
.sec-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.sec-head .kicker {
  display: block; font-size: 13px; font-weight: 700; letter-spacing: .18em;
  color: var(--blue); margin-bottom: 12px; text-transform: uppercase;
}
.sec-head h2 { font-size: clamp(24px, 2.9vw, 34px); color: var(--navy); margin-bottom: 14px; }
.sec-head p { color: var(--muted); font-size: 16px; margin: 0; }

/* ---------- 产品卡片 ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card {
  display: flex; flex-direction: column; background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: #cfdbe9; }
.card-media { aspect-ratio: 10 / 7; overflow: hidden; background: var(--soft); }
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.card:hover .card-media img { transform: scale(1.04); }
.card-body { padding: 22px 24px 26px; display: flex; flex-direction: column; flex: 1; }
.card-body h3 { font-size: 19px; color: var(--navy); margin-bottom: 8px; }
.card-body p { color: var(--muted); font-size: 14.5px; margin: 0 0 16px; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: auto; }
.tag {
  font-size: 12.5px; color: var(--navy-600); background: #eef4fa;
  padding: 4px 10px; border-radius: 999px; letter-spacing: .02em;
}
.card .more {
  display: inline-flex; align-items: center; gap: 6px; margin-top: 18px;
  font-size: 14px; font-weight: 600; color: var(--navy);
}
.card .more svg { width: 14px; height: 14px; transition: transform .2s ease; }
.card:hover .more svg { transform: translateX(4px); }

/* ---------- 优势 ---------- */
.features { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.feature { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 24px; }
.feature .ico {
  width: 46px; height: 46px; border-radius: 11px; display: grid; place-items: center;
  background: linear-gradient(145deg, #eaf2fa, #dbe9f7); margin-bottom: 16px;
}
.feature .ico svg { width: 23px; height: 23px; stroke: var(--navy-600); }
.feature h3 { font-size: 16.5px; color: var(--navy); margin-bottom: 6px; }
.feature p { font-size: 14px; color: var(--muted); margin: 0; }

/* ---------- 应用领域 ---------- */
.apps { display: flex; flex-wrap: wrap; gap: 12px; }
.apps li {
  padding: 11px 20px; background: #fff; border: 1px solid var(--line); border-radius: 999px;
  font-size: 14.5px; color: var(--navy-700); font-weight: 500;
}
.apps li::before { content: ""; display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--gold); margin-right: 9px; vertical-align: 2px; }

/* ---------- 关于（图文） ---------- */
.split { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.split-media { border-radius: 16px; overflow: hidden; box-shadow: var(--shadow-md); }
.split-media img { width: 100%; }
.split h2 { font-size: clamp(24px, 2.7vw, 32px); color: var(--navy); }
.split .lead { font-size: 16px; color: var(--ink); }
.split p { color: var(--muted); }
.checks { display: grid; gap: 12px; margin: 26px 0 30px; }
.checks li { display: flex; gap: 10px; align-items: flex-start; font-size: 14.5px; color: var(--ink); }
.checks svg { width: 19px; height: 19px; flex: 0 0 auto; margin-top: 2px; stroke: var(--blue); }

/* ---------- 新闻 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card {
  display: flex; flex-direction: column; background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 26px 26px 24px; transition: all .25s ease;
}
.news-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: #cfdbe9; }
.news-card time { font-size: 12.5px; color: var(--muted); letter-spacing: .04em; display: block; margin-bottom: 12px; }
.news-card h3 { font-size: 17.5px; color: var(--navy); margin-bottom: 10px; }
.news-card p { font-size: 14px; color: var(--muted); margin: 0 0 16px; }
.news-card .more { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 600; color: var(--navy); margin-top: auto; }
.news-card .more svg,
a.more svg { width: 14px; height: 14px; flex: 0 0 auto; vertical-align: -2px; }

/* ---------- 行动条 ---------- */
.cta-band { background: linear-gradient(135deg, #0b2a4a, #14406e); color: #fff; padding: 56px 0; }
.cta-band .inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.cta-band h2 { color: #fff; font-size: clamp(21px, 2.3vw, 27px); margin: 0 0 8px; }
.cta-band p { margin: 0; color: rgba(230, 240, 249, .8); font-size: 15px; }

/* ---------- 页脚 ---------- */
.site-foot { background: #071d33; color: #a9bdd1; padding: 60px 0 0; font-size: 14px; }
.foot-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 44px; }
.site-foot h3 { color: #fff; font-size: 15px; letter-spacing: .06em; margin-bottom: 18px; }
.site-foot a { color: #a9bdd1; }
.site-foot a:hover { color: #fff; }
.foot-brand { display: flex; align-items: center; gap: 11px; margin-bottom: 16px; }
.foot-brand img { width: 38px; height: 38px; border-radius: 9px; }
.foot-brand strong { color: #fff; font-size: 16px; }
.site-foot p { color: #8fa6bc; line-height: 1.8; }
.foot-links li { margin-bottom: 10px; }
.foot-contact li { margin-bottom: 12px; display: flex; gap: 9px; }
.foot-contact svg { width: 16px; height: 16px; stroke: #6d8aa8; flex: 0 0 auto; margin-top: 4px; }
.foot-bottom {
  border-top: 1px solid rgba(255, 255, 255, .08); padding: 20px 0 24px;
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-size: 13px; color: #7c93a9;
}

/* ---------- 内页头部 ---------- */
.page-hero {
  background:
    radial-gradient(700px 320px at 82% 0%, rgba(47, 130, 196, .30), transparent 62%),
    linear-gradient(150deg, #0b2a4a, #123c66);
  color: #fff; padding: 64px 0 58px; position: relative; overflow: hidden;
}
.page-hero::after {
  content: ""; position: absolute; inset: 0; opacity: .35; pointer-events: none;
  background-image: linear-gradient(90deg, rgba(255, 255, 255, .06) 1px, transparent 1px);
  background-size: 72px 100%;
}
.page-hero .inner { position: relative; z-index: 1; }
.crumb { font-size: 13px; color: rgba(224, 236, 246, .7); margin-bottom: 14px; display: flex; gap: 8px; align-items: center; }
.crumb a { color: rgba(224, 236, 246, .85); }
.crumb a:hover { color: #fff; }
.page-hero h1 { font-size: clamp(26px, 3.3vw, 38px); color: #fff; margin-bottom: 12px; }
.page-hero p { color: rgba(226, 237, 247, .82); margin: 0; max-width: 46em; font-size: 15.5px; }

/* ---------- 产品详情节 ---------- */
.prod { padding: 76px 0; border-bottom: 1px solid var(--line); }
.prod:last-of-type { border-bottom: 0; }
.prod-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.prod:nth-child(even) .prod-grid .prod-media { order: 2; }
.prod-media { border-radius: 16px; overflow: hidden; box-shadow: var(--shadow-md); background: var(--soft); }
.prod-media img { width: 100%; }
.prod h2 { font-size: clamp(22px, 2.4vw, 30px); color: var(--navy); margin-bottom: 6px; }
.prod .en { font-size: 13px; letter-spacing: .12em; color: var(--blue); text-transform: uppercase; margin-bottom: 18px; display: block; }
.prod p { color: var(--muted); font-size: 15px; }
.spec-table { width: 100%; border-collapse: collapse; margin: 22px 0 24px; font-size: 14px; }
.spec-table th, .spec-table td { border: 1px solid var(--line); padding: 10px 14px; text-align: left; }
.spec-table th { background: var(--soft); color: var(--navy); font-weight: 600; white-space: nowrap; width: 38%; }
.spec-table td { color: var(--muted); }
.prod .note { font-size: 12.5px; color: #8595a8; margin: 0; }
.prod .btn-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }

/* ---------- 联系 ---------- */
.contact-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 48px; align-items: start; }
.info-list { display: grid; gap: 14px; margin-bottom: 28px; }
.info-card {
  display: flex; gap: 16px; padding: 20px 22px; background: #fff;
  border: 1px solid var(--line); border-radius: var(--radius);
}
.info-card .ico {
  width: 42px; height: 42px; border-radius: 10px; background: #eef4fa;
  display: grid; place-items: center; flex: 0 0 auto;
}
.info-card .ico svg { width: 20px; height: 20px; stroke: var(--navy-600); }
.info-card dt { font-size: 13px; color: var(--muted); letter-spacing: .04em; }
.info-card dd { margin: 2px 0 0; font-size: 16px; font-weight: 600; color: var(--navy); }
.info-card dd a { color: var(--navy); }
.info-card dd small { display: block; font-size: 12.5px; font-weight: 400; color: var(--muted); }

.map-box {
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--soft);
  padding: 24px; text-align: center;
}
.map-box svg { width: 40px; height: 40px; margin: 0 auto 10px; stroke: var(--navy-600); }
.map-box p { font-size: 14px; color: var(--muted); margin-bottom: 14px; }

.form { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; box-shadow: var(--shadow-sm); }
.form h2 { font-size: 20px; color: var(--navy); margin-bottom: 6px; }
.form > p { font-size: 14px; color: var(--muted); margin-bottom: 22px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 13.5px; font-weight: 600; color: var(--navy); margin-bottom: 7px; }
.field label .req { color: #d94848; }
.field input, .field textarea, .field select {
  width: 100%; padding: 12px 14px; border: 1px solid #d5dfea; border-radius: 9px;
  font-family: inherit; font-size: 15px; color: var(--ink); background: #fff;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.field textarea { min-height: 120px; resize: vertical; }
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(31, 111, 178, .12);
}
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.hp { position: absolute; left: -9999px; opacity: 0; height: 0; overflow: hidden; }
.form-note { font-size: 12.5px; color: #8595a8; margin: 14px 0 0; }
.form-ok, .form-err {
  display: none; padding: 12px 16px; border-radius: 9px; font-size: 14px; margin-bottom: 18px;
}
.form-ok { background: #e8f6ee; color: #1c6b41; border: 1px solid #bfe4cf; }
.form-err { background: #fdecec; color: #8d2626; border: 1px solid #f5c9c9; }

/* ---------- 联系动作（替代在线表单） ---------- */
.contact-actions { display: grid; gap: 12px; margin: 22px 0 24px; }
.caction {
  display: flex; align-items: center; gap: 14px; width: 100%;
  padding: 15px 18px; border: 1px solid var(--line); border-radius: 12px;
  background: #fff; color: var(--navy); font-family: inherit; text-align: left;
  cursor: pointer; transition: all .2s ease;
}
.caction:hover {
  border-color: #bcd0e4; background: #f8fbfe; color: var(--navy);
  transform: translateY(-1px); box-shadow: var(--shadow-sm);
}
.caction .ci {
  width: 40px; height: 40px; border-radius: 10px; background: #eef4fa;
  display: grid; place-items: center; flex: 0 0 auto;
}
.caction .ci svg { width: 19px; height: 19px; stroke: var(--navy-600); }
.caction .ct { display: flex; flex-direction: column; line-height: 1.4; flex: 1; min-width: 0; }
.caction .ct b { font-size: 15.5px; color: var(--navy); font-weight: 700; }
.caction .ct small { font-size: 12.5px; color: var(--muted); margin-top: 2px; }
.caction > svg { width: 16px; height: 16px; stroke: #9fb3c7; flex: 0 0 auto; }
.caction-hint {
  font-size: 12.5px; color: var(--blue); border: 1px solid #cfe0f0;
  padding: 3px 10px; border-radius: 999px; flex: 0 0 auto; white-space: nowrap;
}
.caction.is-copied .caction-hint { color: #1c6b41; border-color: #bfe4cf; background: #eefaf3; }

.quote-tip {
  background: var(--soft); border: 1px solid var(--line);
  border-radius: 12px; padding: 18px 20px;
}
.quote-tip b { display: block; font-size: 14px; color: var(--navy); margin-bottom: 8px; }
.quote-tip .qt-line { font-size: 13.5px; color: var(--navy-700); font-weight: 600; margin: 0 0 10px; }
.quote-tip .qt-eg { font-size: 12.5px; color: var(--muted); margin: 0 0 6px; line-height: 1.7; }
.quote-tip .qt-eg:last-child { margin-bottom: 0; }

/* ---------- 文章正文 ---------- */
.prose { max-width: 780px; }
.prose h2 { font-size: 22px; color: var(--navy); margin: 38px 0 14px; }
.prose h3 { font-size: 18px; color: var(--navy-700); margin: 28px 0 10px; }
.prose p, .prose li { color: #37485c; font-size: 15.8px; line-height: 1.95; }
.prose ul { list-style: none; margin: 0 0 18px; padding: 0; }
.prose ul li { padding-left: 20px; position: relative; margin-bottom: 8px; }
.prose ul li::before {
  content: ""; position: absolute; left: 2px; top: .72em; width: 6px; height: 6px;
  border-radius: 50%; background: var(--gold);
}
.prose blockquote {
  margin: 24px 0; padding: 16px 22px; background: var(--soft);
  border-left: 3px solid var(--blue); color: #37485c; font-size: 15px;
}
.prose figure { margin: 26px 0; }
.prose figure img { border-radius: 12px; }
.prose figcaption { font-size: 12.5px; color: var(--muted); margin-top: 8px; text-align: center; }
.article-meta { display: flex; gap: 18px; flex-wrap: wrap; font-size: 13px; color: var(--muted); margin-bottom: 30px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.article-foot { margin-top: 46px; padding-top: 26px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* ---------- 动效（仅在 JS 可用时隐藏，避免脚本失效导致内容不可见） ---------- */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

.back-top {
  position: fixed; right: 22px; bottom: 26px; z-index: 40;
  width: 46px; height: 46px; border-radius: 50%; border: 1px solid var(--line);
  background: #fff; color: var(--navy); cursor: pointer; box-shadow: var(--shadow-md);
  display: grid; place-items: center; opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: all .25s ease;
}
.back-top.is-show { opacity: 1; visibility: visible; transform: none; }
.back-top svg { width: 18px; height: 18px; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .features { grid-template-columns: repeat(2, 1fr); }
  .foot-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .split { gap: 36px; }
}

@media (max-width: 900px) {
  .nav-toggle { display: flex; }
  .nav {
    position: absolute; top: 74px; left: 0; right: 0; margin: 0;
    flex-direction: column; align-items: stretch; gap: 2px; padding: 12px 18px 18px;
    background: #fff; border-bottom: 1px solid var(--line);
    box-shadow: 0 18px 30px rgba(11, 42, 74, .10);
    display: none;
  }
  .nav.is-open { display: flex; }
  .nav a { padding: 12px 12px; font-size: 15.5px; }
  .head-cta { margin-left: auto; }
  .head-phone span { display: none; }
  .hero-inner { padding-top: 58px; }
  .hero-grid { grid-template-columns: 1fr; gap: 36px; padding-bottom: 42px; }
  .hero-visual { max-width: 460px; }
  .stats { grid-template-columns: 1fr 1fr; }
  .stat { padding: 22px 18px; border-bottom: 1px solid rgba(255, 255, 255, .10); }
  .stat:nth-child(2n) { border-right: 0; }
  .split, .prod-grid, .contact-grid { grid-template-columns: 1fr; }
  .prod:nth-child(even) .prod-grid .prod-media { order: 0; }
  .section { padding: 62px 0; }
  .cta-band { padding: 44px 0; }
}

@media (max-width: 640px) {
  .wrap { padding: 0 18px; }
  .head-inner { height: 64px; gap: 12px; }
  .brand img { width: 34px; height: 34px; }
  .brand-name { font-size: 15.5px; }
  .brand-sub { display: none; }
  .nav { top: 64px; }
  .cards, .news-grid, .features, .field-row { grid-template-columns: 1fr; }
  .hero-inner { padding-top: 52px; }
  .hero .btn-row { margin-bottom: 44px; gap: 10px; }
  .hero .btn-row .btn { flex: 1 1 100%; }
  .stats { grid-template-columns: 1fr; }
  .stat { border-right: 0; }
  .section { padding: 52px 0; }
  .sec-head { margin-bottom: 32px; }
  .form { padding: 22px; }
  .foot-grid { grid-template-columns: 1fr; gap: 28px; }
  .foot-bottom { flex-direction: column; gap: 8px; }
  .prod { padding: 52px 0; }
  .spec-table th { width: 40%; }
}