/* ============================================================
   世马科技 SEAMA — 企业网站模板
   墨黑工业风 · 全局样式
   ============================================================ */

/* 思源黑体(Noto Sans SC) 子集嵌入
   © 2014-2020 Adobe · SIL OFL 1.1 开源许可，可商用嵌入
   已按全站文本子集化，单个字重约 0.14MB  */
@font-face {
  font-family: "Noto Sans SC";
  src: url("../assets/fonts/NotoSansSC-Regular-subset.otf") format("opentype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Noto Sans SC";
  src: url("../assets/fonts/NotoSansSC-Medium-subset.otf") format("opentype");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Noto Sans SC";
  src: url("../assets/fonts/NotoSansSC-Bold-subset.otf") format("opentype");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

:root {
  --navy-900: #0b0e14;
  --navy-800: #141821;
  --navy-700: #181d27;
  --navy-600: #242c39;
  --primary: #ff7d00;            /* 亮橙 — 主强调色 */
  --primary-dark: #e05e00;       /* 深橙 — hover */
  --accent: #ffa14d;             /* 亮橙黄 — 点缀/光环 */
  --gradient: linear-gradient(135deg, #e05e00 0%, #ffa94d 100%);
  --text-main: #1c2434;
  --text-sub: #5a6478;
  --bg-light: #f4f7fc;
  --border: #e3e9f3;
  --white: #ffffff;
  --shadow-sm: 0 4px 14px rgba(20,18,14,0.08);
  --shadow-md: 0 10px 30px rgba(20,18,14,0.12);
  --shadow-lg: 0 20px 50px rgba(20,18,14,0.18);
  --radius: 14px;
  --font: "Noto Sans SC", "Segoe UI", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  --container: 1200px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--text-main);
  font-size: 16px;
  line-height: 1.7;
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; transition: color .25s; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; }

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

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 30px; border-radius: 999px; font-size: 15px; font-weight: 600;
  border: none; transition: all .3s; white-space: nowrap;
}
.btn-primary { background: var(--gradient); color: #fff; box-shadow: 0 8px 22px rgba(255,125,0,.35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(255,125,0,.45); }
.btn-outline { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,.55); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.btn-light { background: #fff; color: var(--navy-800); box-shadow: var(--shadow-sm); }
.btn-light:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }

/* ---------- 区块标题 ---------- */
.section { padding: 96px 0; }
.section.alt { background: var(--bg-light); }
.section.dark { background: var(--navy-900); color: #fff; }

.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head .eyebrow {
  display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: 3px;
  color: var(--primary); text-transform: uppercase; margin-bottom: 12px;
}
.section-head h2 { font-size: 36px; font-weight: 800; letter-spacing: 1px; line-height: 1.3; }
.section-head p { color: var(--text-sub); margin-top: 14px; font-size: 16px; }
.section.dark .section-head p { color: rgba(255,255,255,.65); }

/* ---------- 导航栏 ---------- */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background .3s, box-shadow .3s;
  background: rgba(11,14,20,.0);
}
.header.scrolled { background: rgba(11,14,20,.92); backdrop-filter: blur(12px); box-shadow: 0 4px 20px rgba(0,0,0,.25); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 76px; }

.logo { display: inline-flex; align-items: center; color: #fff; }
.logo .logo-img { display: block; width: auto; height: 30px; max-width: 36vw; object-fit: contain; transition: opacity .3s, transform .3s; }
.logo:hover .logo-img { opacity: .85; transform: translateY(-1px); }

.menu { display: flex; align-items: center; gap: 34px; }
.menu a { color: rgba(255,255,255,.85); font-size: 15px; font-weight: 500; position: relative; padding: 6px 0; }
.menu a::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 0; height: 2px;
  background: var(--gradient); border-radius: 2px; transition: width .3s;
}
.menu a:hover, .menu a.active { color: #fff; }
.menu a:hover::after, .menu a.active::after { width: 100%; }
.nav-cta { margin-left: 10px; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; padding: 6px; }
.nav-toggle span { width: 24px; height: 2px; background: #fff; border-radius: 2px; transition: .3s; }

/* 移动端菜单 */
@media (max-width: 960px) {
  .nav-toggle { display: flex; }
  .menu {
    position: fixed; top: 76px; right: 0; width: 280px; height: calc(100vh - 76px);
    flex-direction: column; align-items: flex-start; gap: 0;
    background: var(--navy-800); padding: 24px 30px; transform: translateX(100%); transition: transform .35s;
  }
  .menu.open { transform: translateX(0); }
  .menu a { width: 100%; padding: 14px 0; border-bottom: 1px solid rgba(255,255,255,.08); font-size: 16px; }
  .menu a::after { display: none; }
  .nav-cta { display: none; }
}

/* ---------- 首页 Hero ---------- */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  background: radial-gradient(1200px 600px at 80% -10%, #232b37 0%, transparent 60%),
              radial-gradient(900px 500px at -10% 110%, #1a202b 0%, transparent 55%),
              linear-gradient(160deg, #0b0e14 0%, #11151c 55%, #141821 100%);
  color: #fff; overflow: hidden;
}
.hero::before, .hero::after {
  content: ""; position: absolute; border-radius: 50%; filter: blur(60px); opacity: .5; pointer-events: none;
}
.hero::before { width: 420px; height: 420px; background: rgba(245,134,46,.35); top: -120px; right: 8%; }
.hero::after { width: 300px; height: 300px; background: rgba(255,169,77,.25); bottom: -80px; left: 12%; }

/* ===== Hero 背景：可交互蜘蛛网粒子网格 (canvas) ===== */
.hero-grid { position: absolute; inset: 0; overflow: hidden; }
.hero-grid canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.hero-grid::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(90deg, rgba(11,14,20,.88) 0%, rgba(11,14,20,.45) 34%, rgba(11,14,20,.08) 62%, transparent 100%);
}

.hero .container { position: relative; z-index: 2; display: grid; grid-template-columns: 1.1fr .9fr; gap: 60px; align-items: center; padding-top: 120px; padding-bottom: 80px; }

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; padding: 7px 16px; border-radius: 999px;
  background: rgba(255,169,77,.12); border: 1px solid rgba(255,169,77,.35);
  color: var(--accent); font-size: 13px; font-weight: 600; letter-spacing: 1px; margin-bottom: 26px;
}
.hero h1 { font-size: 52px; font-weight: 800; line-height: 1.22; letter-spacing: 1px; }
.hero h1 .grad { background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { margin: 22px 0 34px; font-size: 17px; color: rgba(255,255,255,.72); max-width: 540px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-meta { display: flex; gap: 34px; margin-top: 48px; flex-wrap: wrap; }
.hero-meta .item b { font-size: 30px; font-weight: 800; color: #fff; }
.hero-meta .item b i { font-style: normal; color: var(--accent); }
.hero-meta .item span { display: block; font-size: 13px; color: rgba(255,255,255,.55); margin-top: 2px; }

/* Hero 电机示意（SVG 动画） */
.hero-visual { display: flex; justify-content: center; }
.motor-wrap { position: relative; width: 420px; height: 420px; }
.motor-wrap .ring { position: absolute; border-radius: 50%; border: 1px solid rgba(255,169,77,.25); }
.motor-wrap .ring.r1 { inset: 0; animation: spin 26s linear infinite; }
.motor-wrap .ring.r2 { inset: 38px; border-style: dashed; animation: spin-rev 20s linear infinite; }
.motor-wrap .ring.r3 { inset: 86px; border-color: rgba(245,134,46,.45); }
.motor-core {
  position: absolute; inset: 120px; border-radius: 50%;
  background: radial-gradient(circle at 32% 28%, #ff7d00 0%, #232b37 55%, #11151c 100%);
  box-shadow: 0 0 60px rgba(245,134,46,.55), inset 0 0 40px rgba(255,169,77,.25);
  display: flex; align-items: center; justify-content: center;
}
.motor-core .core-inner {
  width: 96px; height: 96px; border-radius: 50%; border: 3px solid var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700; color: var(--accent); letter-spacing: 1px; text-align: center;
  animation: pulse 2.4s ease-in-out infinite;
}
.motor-chip { position: absolute; display: inline-flex; align-items: center; gap: 7px; background: rgba(16,20,28,.92); border: 1px solid rgba(255,169,77,.4); border-radius: 10px; padding: 8px 14px; font-size: 13px; font-weight: 600; color: var(--accent); box-shadow: 0 8px 20px rgba(0,0,0,.35); white-space: nowrap; max-width: 210px; }
.motor-chip .chip-icon { display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0; width: 14px; height: 14px; }
.motor-chip .chip-icon svg { width: 14px; height: 14px; }
.motor-chip.c1 { top: 44px; left: 0; right: 0; margin: 0 auto; width: max-content; animation: floaty 4s ease-in-out infinite; }
.motor-chip.c2 { top: 306px; left: 12px; animation: floaty 4.6s ease-in-out .6s infinite; }
.motor-chip.c3 { top: 340px; right: 12px; animation: floaty 5s ease-in-out 1.1s infinite; }

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes spin-rev { to { transform: rotate(-360deg); } }
@keyframes pulse { 0%,100% { box-shadow: 0 0 0 0 rgba(255,169,77,.5); } 50% { box-shadow: 0 0 0 22px rgba(255,169,77,0); } }
@keyframes floaty { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

@media (max-width: 960px) {
  .hero .container { grid-template-columns: 1fr; text-align: center; padding-top: 140px; }
  .hero h1 { font-size: 38px; }
  .hero p.lead { margin-left: auto; margin-right: auto; }
  .hero-actions, .hero-meta { justify-content: center; }
  .motor-wrap { width: 300px; height: 300px; margin: 0 auto; }
  .motor-core { inset: 86px; }
  .motor-core .core-inner { width: 70px; height: 70px; font-size: 10px; }
  .motor-chip { display: none; }
  .section { padding: 64px 0; }
  .section-head h2 { font-size: 28px; }
}

/* ---------- 数据条 ---------- */
.stats-strip { background: var(--navy-800); color: #fff; padding: 44px 0; }
.stats-strip .grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stats-strip .num { font-size: 40px; font-weight: 800; background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stats-strip .label { font-size: 14px; color: rgba(255,255,255,.6); margin-top: 4px; }
@media (max-width: 960px) { .stats-strip .grid { grid-template-columns: repeat(2, 1fr); gap: 30px; } }

/* ---------- 卡片通用 ---------- */
.card { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow-sm); padding: 30px; transition: transform .3s, box-shadow .3s; }
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.card .icon { width: 58px; height: 58px; border-radius: 14px; display: flex; align-items: center; justify-content: center; background: rgba(245,134,46,.1); color: var(--primary); margin-bottom: 20px; }
.card h3 { font-size: 19px; font-weight: 700; margin-bottom: 10px; }
.card p { color: var(--text-sub); font-size: 14.5px; }

/* ---------- 产品卡 ---------- */
.products-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
@media (max-width: 1080px) { .products-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .products-grid { grid-template-columns: 1fr; } }

.prod-card { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow-sm); overflow: hidden; transition: transform .3s, box-shadow .3s; }
.prod-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.prod-fig { height: 190px; display: flex; align-items: center; justify-content: center; background: linear-gradient(150deg, #11151c 0%, #1c222d 60%, #2a3340 100%); position: relative; overflow: hidden; }
.prod-fig::after { content: ""; position: absolute; inset: 0; background: radial-gradient(360px 150px at 50% 0%, rgba(255,140,60,.16), transparent 70%); }
.prod-fig svg { position: relative; z-index: 1; filter: drop-shadow(0 10px 22px rgba(0,0,0,.4)); }
.prod-body { padding: 22px 24px 26px; }
.prod-body .tag { display: inline-block; font-size: 11.5px; font-weight: 700; color: var(--primary); background: rgba(245,134,46,.1); border-radius: 6px; padding: 3px 10px; margin-bottom: 12px; letter-spacing: 1px; }
.prod-body h3 { font-size: 18px; font-weight: 700; margin-bottom: 6px; }
.prod-body p { font-size: 14px; color: var(--text-sub); }
.prod-specs { margin-top: 14px; display: grid; grid-template-columns: 1fr; gap: 6px; font-size: 12.5px; color: var(--text-sub); }
.prod-specs b { color: var(--text-main); font-weight: 600; }

/* ---------- 特性网格 ---------- */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
@media (max-width: 960px) { .feature-grid { grid-template-columns: 1fr; } }

/* ---------- 行业应用 ---------- */
.industry-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
@media (max-width: 960px) { .industry-grid { grid-template-columns: 1fr; } }

/* 应用场景：4 列一行，紧凑不孤行 */
.apps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
@media (max-width: 1080px) { .apps-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .apps-grid { grid-template-columns: 1fr; } }
.industry-card { position: relative; border-radius: var(--radius); overflow: hidden; min-height: 200px; display: flex; align-items: flex-end; color: #fff; padding: 26px; transition: transform .3s; }
.industry-card:hover { transform: translateY(-6px); }
.industry-card .bg { position: absolute; inset: 0; z-index: 0; }
.industry-card .bg svg { width: 100%; height: 100%; object-fit: cover; }
.industry-card .content { position: relative; z-index: 1; }
.industry-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 6px; }
.industry-card p { font-size: 13.5px; color: rgba(255,255,255,.75); }

/* ---------- 流程步骤 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
@media (max-width: 960px) { .steps { grid-template-columns: 1fr; } }
.step { position: relative; text-align: center; padding: 34px 20px; }
.step .num {
  width: 60px; height: 60px; margin: 0 auto 18px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: 22px; font-weight: 800; color: #fff; background: var(--gradient); box-shadow: 0 10px 24px rgba(245,134,46,.35);
}
.step h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.step p { font-size: 13.5px; color: var(--text-sub); }

/* ---------- 新闻卡 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
@media (max-width: 960px) { .news-grid { grid-template-columns: 1fr; } }
.news-card { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); transition: transform .3s, box-shadow .3s; display: flex; flex-direction: column; }
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.news-thumb { height: 170px; display: flex; align-items: center; justify-content: center; background: linear-gradient(140deg, #11151c, #232b37); color: rgba(255,255,255,.25); font-size: 42px; }
.news-body { padding: 22px 24px 26px; flex: 1; display: flex; flex-direction: column; }
.news-body .date { font-size: 12.5px; color: var(--primary); font-weight: 600; margin-bottom: 10px; }
.news-body h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; line-height: 1.5; }
.news-body p { font-size: 13.5px; color: var(--text-sub); flex: 1; }
.news-body .more { margin-top: 16px; font-size: 13.5px; font-weight: 600; color: var(--primary); }
.news-body .more:hover { color: var(--primary-dark); }

/* ---------- 合作伙伴 ---------- */
.partners { display: flex; flex-wrap: wrap; justify-content: center; gap: 18px; }
.partner-logo { padding: 18px 34px; background: #fff; border: 1px solid var(--border); border-radius: 10px; color: #3a4152; font-size: 17px; font-weight: 700; letter-spacing: 1px; transition: all .3s; }
.partner-logo:hover { color: var(--primary); border-color: var(--primary); box-shadow: var(--shadow-sm); }
.partners-legal { margin: 26px 0 0; text-align: center; font-size: 12px; color: #a5adbd; line-height: 1.8; }

/* ---------- CTA 横幅 ---------- */
.cta-band {
  background: radial-gradient(800px 400px at 50% -20%, rgba(245,134,46,.55), transparent 60%), var(--navy-800);
  color: #fff; text-align: center; padding: 72px 24px;
}
.cta-band h2 { font-size: 32px; font-weight: 800; margin-bottom: 14px; }
.cta-band p { color: rgba(255,255,255,.7); max-width: 640px; margin: 0 auto 30px; }
.cta-band .actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ---------- 页脚 ---------- */
.footer { background: var(--navy-900); color: rgba(255,255,255,.72); padding: 64px 0 0; font-size: 14px; }
.footer .cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 44px; }
@media (max-width: 960px) { .footer .cols { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) { .footer .cols { grid-template-columns: 1fr; } }
.footer h4 { color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 18px; }
.footer .about p { margin-top: 14px; font-size: 13.5px; line-height: 1.9; color: rgba(255,255,255,.55); }
.footer ul li { margin-bottom: 10px; }
.footer ul a:hover { color: var(--accent); }
.footer .contact li { display: flex; gap: 10px; margin-bottom: 12px; align-items: flex-start; }
.footer .contact svg { flex-shrink: 0; margin-top: 3px; }
.footer .bottom { border-top: 1px solid rgba(255,255,255,.1); padding: 20px 0; text-align: center; font-size: 13px; color: rgba(255,255,255,.4); }

/* ---------- 子页面 Banner ---------- */
.page-banner { position: relative; padding: 96px 0 40px; background: radial-gradient(900px 420px at 85% -10%, #232b37 0%, transparent 55%), linear-gradient(160deg, #0b0e14 0%, #11151c 60%, #141821 100%); color: #fff; overflow: hidden; }
.page-banner .grid-overlay { position: absolute; inset: 0; opacity: .06; background-image: linear-gradient(rgba(255,255,255,.5) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.5) 1px, transparent 1px); background-size: 34px 34px; }
.page-banner h1 { font-size: 42px; font-weight: 800; letter-spacing: 1px; }
.page-banner .crumb { margin-top: 14px; font-size: 14px; color: rgba(255,255,255,.6); }
.page-banner .crumb a:hover { color: var(--accent); }
.page-banner .crumb b { color: var(--accent); font-weight: 600; }
@media (max-width: 960px) { .page-banner { padding: 88px 0 32px; } .page-banner h1 { font-size: 32px; } }

/* ---------- 产品中心页 ---------- */
.filter-bar { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; margin-bottom: 44px; }
.filter-btn { padding: 9px 24px; border-radius: 999px; border: 1.5px solid var(--border); background: #fff; color: var(--text-sub); font-size: 14px; font-weight: 600; transition: all .3s; }
.filter-btn:hover { border-color: var(--primary); color: var(--primary); }
.filter-btn.active { background: var(--gradient); color: #fff; border-color: transparent; box-shadow: 0 6px 16px rgba(245,134,46,.3); }

.prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
@media (max-width: 1080px) { .prod-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .prod-grid { grid-template-columns: 1fr; } }

.spec-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.spec-table th, .spec-table td { padding: 12px 16px; border: 1px solid var(--border); text-align: left; }
.spec-table thead th { background: var(--navy-800); color: #fff; font-weight: 600; white-space: nowrap; }
.spec-table tbody tr:nth-child(even) { background: var(--bg-light); }
.spec-table tbody th { background: var(--bg-light); font-weight: 600; white-space: nowrap; color: var(--text-main); }

/* ---------- 关于页：历程 ---------- */
.timeline { position: relative; max-width: 860px; margin: 0 auto; padding-left: 40px; }
.timeline::before { content: ""; position: absolute; left: 12px; top: 6px; bottom: 6px; width: 2px; background: linear-gradient(var(--primary), var(--accent)); }
.tl-item { position: relative; padding: 0 0 40px 30px; }
.tl-item::before { content: ""; position: absolute; left: -34px; top: 6px; width: 16px; height: 16px; border-radius: 50%; background: #fff; border: 4px solid var(--primary); box-shadow: 0 0 0 5px rgba(245,134,46,.15); }
.tl-item .year { font-size: 15px; font-weight: 800; color: var(--primary); }
.tl-item h3 { font-size: 18px; font-weight: 700; margin: 4px 0 6px; }
.tl-item p { font-size: 14px; color: var(--text-sub); }

/* ---------- 联系页 ---------- */
.contact-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
@media (max-width: 960px) { .contact-cards { grid-template-columns: 1fr; } }
.contact-card { text-align: center; padding: 36px 24px; }
.contact-card .icon { margin: 0 auto 18px; width: 64px; height: 64px; border-radius: 50%; }
.contact-card h3 { font-size: 17px; margin-bottom: 8px; }
.contact-card p { font-size: 14px; color: var(--text-sub); }

.contact-layout { display: grid; grid-template-columns: 1.15fr .85fr; gap: 40px; }
@media (max-width: 960px) { .contact-layout { grid-template-columns: 1fr; } }

.form-card .row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 640px) { .form-card .row { grid-template-columns: 1fr; } }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 7px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 12px 14px; border: 1.5px solid var(--border); border-radius: 10px;
  font-size: 14px; font-family: inherit; color: var(--text-main); transition: border-color .25s, box-shadow .25s; background: #fff;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 4px rgba(245,134,46,.12);
}
.form-group textarea { resize: vertical; min-height: 130px; }

.map-placeholder {
  border-radius: var(--radius); min-height: 420px; overflow: hidden; position: relative;
  background: linear-gradient(140deg, #161c25, #232b37);
  color: #fff; display: block; padding: 0;
}
.map-placeholder .map-img { width: 100%; height: 100%; min-height: 420px; object-fit: cover; display: block; }

/* ---------- 新闻列表 ---------- */
.news-list { max-width: 900px; margin: 0 auto; }
.news-item { display: flex; gap: 26px; background: #fff; border-radius: var(--radius); padding: 26px 28px; box-shadow: var(--shadow-sm); margin-bottom: 20px; transition: transform .3s, box-shadow .3s; }
.news-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.news-item .date-box { flex-shrink: 0; width: 86px; text-align: center; border-right: 2px solid var(--border); padding-right: 24px; display: flex; flex-direction: column; justify-content: center; }
.news-item .date-box b { font-size: 28px; color: var(--primary); font-weight: 800; line-height: 1; }
.news-item .date-box span { font-size: 13px; color: var(--text-sub); margin-top: 4px; }
.news-item .info { flex: 1; }
.news-item .info .cat { display: inline-block; font-size: 12px; font-weight: 700; color: var(--accent); background: rgba(245,134,46,.1); border-radius: 6px; padding: 2px 10px; margin-bottom: 8px; letter-spacing: 1px; }
.news-item .info h3 { font-size: 18px; font-weight: 700; margin-bottom: 6px; transition: color .25s; }
.news-item:hover .info h3 { color: var(--primary); }
.news-item .info p { font-size: 13.5px; color: var(--text-sub); }
@media (max-width: 640px) { .news-item { flex-direction: column; gap: 14px; } .news-item .date-box { border-right: none; border-bottom: 2px solid var(--border); padding: 0 0 14px; width: 100%; flex-direction: row; gap: 10px; align-items: baseline; } }

/* ---------- 技术页 ---------- */
.tech-hero { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
@media (max-width: 960px) { .tech-hero { grid-template-columns: 1fr; } }
.tech-hero h2 { font-size: 30px; font-weight: 800; margin-bottom: 18px; line-height: 1.35; }
.tech-hero p { color: var(--text-sub); margin-bottom: 16px; }
.tech-hero ul li { position: relative; padding-left: 26px; margin-bottom: 10px; color: var(--text-main); font-size: 15px; }
.tech-hero ul li::before { content: ""; position: absolute; left: 0; top: 8px; width: 12px; height: 12px; border-radius: 4px; background: var(--gradient); transform: rotate(45deg); }

.wave-card { background: linear-gradient(150deg, #161c25, #232b37); border-radius: var(--radius); padding: 40px; color: #fff; display: flex; align-items: center; justify-content: center; min-height: 300px; box-shadow: var(--shadow-lg); }
.wave-card svg { width: 100%; max-width: 480px; }

/* ---------- 动画：滚动显现 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ---------- 回到顶部 ---------- */
.back-top {
  position: fixed; right: 26px; bottom: 26px; width: 46px; height: 46px; border-radius: 12px;
  background: var(--gradient); color: #fff; border: none; display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-md); opacity: 0; visibility: hidden; transform: translateY(10px); transition: all .3s; z-index: 90;
}
.back-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { transform: translateY(-3px); }

/* 表单成功提示 */
.form-tip { display: none; margin-top: 14px; padding: 12px 16px; border-radius: 10px; font-size: 14px; line-height: 1.6; }
.form-tip.ok { display: block; background: rgba(0,180,120,.1); color: #00a36c; border: 1px solid rgba(0,180,120,.3); }
.form-tip.err { display: block; background: rgba(220,53,69,.1); color: #dc3545; border: 1px solid rgba(220,53,69,.3); }
.form-tip.loading { display: block; background: rgba(255,151,64,.08); color: #d66b00; border: 1px solid rgba(255,151,64,.3); }
.form-btn[disabled] { opacity: .6; cursor: not-allowed; }

/* ---------- 页脚 / 内容文本通用 ---------- */
.prose p { color: var(--text-sub); font-size: 15.5px; line-height: 2; margin-bottom: 16px; }
.prose strong { color: var(--text-main); }

/* 联系页/关于区配图 */
.about-hero-img { width: 100%; height: auto; border-radius: var(--radius); box-shadow: var(--shadow-md); object-fit: cover; display: block; }

/* ============================================================
   产品中心：图片卡片（首页 prod-card 的图片版）
   ============================================================ */
a.prod-card { display: block; color: inherit; }
.prod-card .prod-fig-img { padding: 0; }
.prod-card .prod-fig-img img { width: 100%; height: 100%; object-fit: cover; display: block; }
.prod-card .more { display: inline-block; margin-top: 14px; font-size: 13.5px; font-weight: 700; color: var(--primary); transition: transform .3s; }
.prod-card:hover .more { transform: translateX(4px); }

/* ============================================================
   产品详情页
   ============================================================ */
/* 产品概览：左图右文 */
.product-overview { display: grid; grid-template-columns: 1fr 1.15fr; gap: 48px; align-items: start; }
@media (max-width: 960px) { .product-overview { grid-template-columns: 1fr; gap: 32px; } }
.product-overview .fig {
  background: linear-gradient(150deg, #e6eefb 0%, #f6f9fe 50%, #e0eaf8 100%);
  border: 1px solid rgba(255,125,0,.18);
  border-radius: var(--radius); padding: 16px;
  display: flex; align-items: center; justify-content: center;
  position: relative; overflow: hidden;
  box-shadow: 0 14px 38px rgba(20,30,50,.18), inset 0 0 0 1px rgba(255,255,255,.6);
}
.product-overview .fig::after { content: ""; position: absolute; inset: 0; background: radial-gradient(360px 190px at 50% 0%, rgba(255,125,0,.16), transparent 70%); pointer-events: none; }
.product-overview .fig img { position: relative; z-index: 1; max-width: 100%; max-height: 380px; border-radius: 8px; box-shadow: 0 0 0 2px rgba(255,125,0,.55), 0 0 0 1px rgba(255,125,0,.28), 0 4px 10px rgba(0,0,0,.14), 0 18px 38px rgba(255,125,0,.18); }
.product-overview .tag-row { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.product-overview h2 { font-size: 30px; font-weight: 800; line-height: 1.3; }
.product-overview .sub { color: var(--primary); font-weight: 600; margin-top: 10px; font-size: 16px; }
.product-overview .lead { color: var(--text-sub); margin-top: 14px; line-height: 1.9; font-size: 15px; }
.product-overview .actions { display: flex; gap: 14px; margin-top: 28px; flex-wrap: wrap; }

/* 关键参数摘要 */
.key-specs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 24px; }
@media (max-width: 640px) { .key-specs { grid-template-columns: repeat(2, 1fr); } }
.key-specs .item { background: var(--bg-light); border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; }
.key-specs .item b { display: block; font-size: 15px; font-weight: 700; color: var(--text-main); }
.key-specs .item span { display: block; font-size: 12.5px; color: var(--text-sub); margin-top: 2px; }

/* 外观与尺寸 */
.media-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
@media (max-width: 960px) { .media-grid { grid-template-columns: 1fr; } }
.media-card { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow-sm); overflow: hidden; }
.media-card .fig {
  background: linear-gradient(135deg, #f2f6fc 0%, #fbfcff 45%, #edf1fa 100%);
  border-bottom: 1px solid var(--border);
  padding: 14px; height: 320px; display: flex; align-items: center; justify-content: center;
}
.media-card .fig img { max-width: 100%; height: 100%; object-fit: contain; border-radius: 8px; box-shadow: 0 0 0 2px rgba(255,125,0,.4), 0 4px 10px rgba(0,0,0,.12), 0 14px 30px rgba(255,125,0,.14); }
.media-card .cap { padding: 14px 20px; border-top: 1px solid var(--border); font-size: 13.5px; color: var(--text-sub); }
.media-card .cap b { color: var(--text-main); }
.dim-data { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 16px; }
.dim-data .item { background: var(--bg-light); border: 1px solid var(--border); border-radius: 10px; padding: 10px 16px; font-size: 13px; color: var(--text-sub); }
.dim-data .item b { color: var(--text-main); font-size: 14px; margin-left: 6px; }

/* 下载区 */
.dl-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
@media (max-width: 960px) { .dl-grid { grid-template-columns: 1fr; } }
.dl-card { display: flex; align-items: center; gap: 16px; background: #fff; border-radius: var(--radius); box-shadow: var(--shadow-sm); padding: 20px 22px; transition: transform .3s, box-shadow .3s; }
.dl-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.dl-card .ico { width: 48px; height: 48px; border-radius: 12px; background: rgba(245,134,46,.1); color: var(--primary); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.dl-card b { display: block; font-size: 15px; color: var(--text-main); }
.dl-card span { display: block; font-size: 12.5px; color: var(--text-sub); margin-top: 3px; }
.dl-card .go { margin-left: auto; color: var(--primary); font-weight: 700; font-size: 13px; white-space: nowrap; }

/* 浅色背景上的描边按钮 */
.btn-ghost { background: transparent; color: var(--text-main); border: 1.5px solid var(--border); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }