@charset "utf-8";
/* ============================================================
   天良数控套料软件 — 现代化科技风格样式
   (与北京盛世天良 NTP 产品官网同一设计体系)
   ============================================================ */

:root {
  --navy-900: #0a1526;
  --navy-800: #0d1b2e;
  --navy-700: #14263f;
  --blue: #2f7df6;
  --blue-dark: #1e6ae4;
  --blue-bright: #38bdf8;
  --text: #1c2733;
  --text-light: #5a6b7d;
  --bg: #ffffff;
  --bg-alt: #f4f7fb;
  --border: #e3e9f1;
  --radius: 14px;
  --shadow: 0 6px 24px rgba(13, 27, 46, 0.08);
  --shadow-lg: 0 16px 48px rgba(13, 27, 46, 0.14);
  --font: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", "Segoe UI", Arial, sans-serif;
  --transition: 0.25s ease;
}

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

html { scroll-behavior: smooth; }

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

img { max-width: 100%; display: block; }

a { color: var(--blue); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--blue-dark); }

.container {
  width: min(1140px, 92%);
  margin: 0 auto;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 24px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
  font-family: inherit;
}

.btn-primary {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 4px 14px rgba(47, 125, 246, 0.35);
}
.btn-primary:hover {
  background: var(--blue-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(47, 125, 246, 0.4);
}

.btn-ghost {
  border-color: rgba(255, 255, 255, 0.35);
  color: #fff;
  background: transparent;
}
.btn-ghost:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.btn-sm { padding: 8px 18px; font-size: 0.85rem; }

/* ---------- 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}
.site-header.scrolled { box-shadow: 0 4px 20px rgba(13, 27, 46, 0.08); }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--navy-800);
}
.brand-logo {
  width: auto;
  height: 44px;
  object-fit: contain;
  border-radius: 7px;
}
.brand-name {
  display: flex;
  flex-direction: column;
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  line-height: 1.25;
  color: var(--navy-800);
}
.brand-sub {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--text-light);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}
.hotline {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(47, 125, 246, 0.08);
  border: 1px solid rgba(47, 125, 246, 0.25);
  color: var(--blue);
  font-size: 0.95rem;
  font-weight: 700;
  padding: 9px 18px;
  border-radius: 100px;
  transition: all var(--transition);
}
.hotline:hover { background: rgba(47, 125, 246, 0.14); color: var(--blue-dark); }
.hotline svg { width: 18px; height: 18px; flex: 0 0 auto; }

.navbar {
  border-top: 1px solid var(--bg-alt);
}
.nav {
  display: flex;
  align-items: center;
  height: 52px;
}
.nav-list {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  height: 100%;
}
.nav-item { height: 100%; display: flex; align-items: center; }
.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  height: 100%;
  padding: 0 18px;
  color: var(--text);
  font-size: 0.98rem;
  font-weight: 500;
  transition: color var(--transition);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 0;
  height: 3px;
  border-radius: 3px 3px 0 0;
  background: var(--blue);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition);
}
.nav-link:hover { color: var(--blue); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link.active {
  color: var(--blue);
  font-weight: 700;
}
.nav-link.active::after { transform: scaleX(1); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px 6px;
  margin-left: auto;
}
.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--navy-800);
  border-radius: 2px;
  transition: all var(--transition);
}
.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); }

/* ---------- 主视觉 Hero ---------- */
.hero {
  position: relative;
  background:
    radial-gradient(760px 320px at 50% 6%, rgba(56, 189, 248, 0.12), transparent 70%),
    linear-gradient(rgba(10, 21, 38, 0.38) 0%, rgba(13, 27, 46, 0.52) 55%, rgba(10, 21, 38, 0.72) 100%),
    url("../image/hero-bg.jpg") center 35% / cover no-repeat;
  color: #fff;
  text-align: center;
  padding: 122px 0 128px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(720px 300px at 50% 0%, rgba(56, 189, 248, 0.10), transparent 70%);
  pointer-events: none;
}
.hero-inner { position: relative; }
.hero-title {
  font-size: clamp(2.1rem, 4.8vw, 3.5rem);
  font-weight: 800;
  letter-spacing: 0.16em;
  line-height: 1.35;
  margin-bottom: 24px;
  background: linear-gradient(92deg, #ffffff 0%, #cfe9ff 28%, #7dd3fc 58%, #38bdf8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: #7dd3fc;
  filter: drop-shadow(0 2px 10px rgba(10, 21, 38, 0.35));
  animation: heroUp 0.9s ease both;
}
.hero-divider {
  display: block;
  width: 76px;
  height: 3px;
  margin: 0 auto 24px;
  border-radius: 2px;
  background: linear-gradient(90deg, transparent, #7dd3fc, transparent);
  box-shadow: 0 1px 8px rgba(10, 21, 38, 0.4);
  animation: heroUp 0.9s ease 0.15s both;
}
.hero-tag {
  font-size: clamp(1rem, 1.9vw, 1.28rem);
  color: #f2f6fb;
  letter-spacing: 0.09em;
  line-height: 2;
  max-width: 780px;
  margin: 0 auto;
  text-shadow: 0 1px 12px rgba(10, 21, 38, 0.55), 0 1px 3px rgba(10, 21, 38, 0.45);
  animation: heroUp 0.9s ease 0.3s both;
}
@keyframes heroUp {
  from { opacity: 0; transform: translateY(28px); }
  to { opacity: 1; transform: none; }
}
@media (max-width: 720px) {
  .hero { padding: 84px 0 90px; }
  .hero-title { letter-spacing: 0.1em; }
}

/* ---------- 区块通用 ---------- */
.section { padding: 72px 0; }
.section-alt { background: var(--bg-alt); }
.section-dark {
  background:
    radial-gradient(900px 420px at 90% 0%, rgba(47, 125, 246, 0.16), transparent 60%),
    linear-gradient(160deg, var(--navy-800), var(--navy-900));
  color: #fff;
}

.section-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 34px;
  padding-bottom: 14px;
  border-bottom: 2px solid rgba(47, 125, 246, 0.2);
}
.section-head img {
  width: 42px;
  height: 42px;
  object-fit: contain;
  border-radius: 9px;
  box-shadow: 0 3px 10px rgba(47, 125, 246, 0.25);
}
.section-head h2 {
  font-size: clamp(1.35rem, 2.4vw, 1.75rem);
  font-weight: 800;
  color: var(--navy-800);
  letter-spacing: 0.02em;
}
.section-head .head-sub {
  margin-left: auto;
  font-size: 0.82rem;
  color: var(--text-light);
  letter-spacing: 0.06em;
}

/* ---------- 产品 Tab ---------- */
.product-tabs {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
  margin-bottom: 30px;
}
.product-tab {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: #fff;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 14px 14px;
  text-align: center;
  transition: all var(--transition);
  box-shadow: var(--shadow);
}
.product-tab:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: #bcd6fb;
}
.product-tab.active {
  border-color: var(--blue);
  background: linear-gradient(160deg, #f4f9ff, #eaf2fe);
}
.product-tab-name {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy-800);
  line-height: 1.4;
}
.product-tab.active .product-tab-name { color: var(--blue); }
.product-tab-dl {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--blue);
  background: rgba(47, 125, 246, 0.08);
  border: 1px solid rgba(47, 125, 246, 0.25);
  border-radius: 100px;
  padding: 5px 14px;
  transition: all var(--transition);
}
.product-tab-dl:hover {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 4px 12px rgba(47, 125, 246, 0.35);
}

/* ---------- 内容卡片 ---------- */
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 34px 38px;
  box-shadow: var(--shadow);
  margin-bottom: 26px;
}
.card > h2.product-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--navy-800);
  text-align: center;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 2px solid rgba(47, 125, 246, 0.18);
}
.card p { color: var(--text-light); font-size: 0.97rem; margin-bottom: 14px; }
.card p strong { color: var(--text); }
.card .lead { color: var(--text); }

.feature-list {
  list-style: none;
  margin: 0 0 14px;
  display: grid;
  gap: 8px;
}
.feature-list li {
  position: relative;
  padding: 10px 14px 10px 40px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 9px;
  color: var(--text-light);
  font-size: 0.95rem;
  transition: all var(--transition);
}
.feature-list li::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 17px;
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background: linear-gradient(135deg, var(--blue-bright), var(--blue));
  box-shadow: 0 2px 6px rgba(47, 125, 246, 0.4);
}
.feature-list li:hover {
  background: #fff;
  border-color: #bcd6fb;
  transform: translateX(3px);
}
.feature-list li strong { color: var(--navy-800); }

/* 步骤块 */
.step {
  display: flex;
  gap: 16px;
  margin: 22px 0 10px;
  align-items: flex-start;
}
.step-badge {
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, var(--blue-bright), var(--blue));
  box-shadow: 0 6px 16px rgba(47, 125, 246, 0.35);
}
.step-body { flex: 1; min-width: 0; }
.step-body p { margin-bottom: 10px; }
.step-body p:last-child { margin-bottom: 0; }
.step-body strong { color: var(--navy-800); }

/* 内容模块（保留原文排版） */
.module-head {
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--blue);
  margin: 24px 0 12px;
  padding-left: 14px;
  border-left: 3px solid var(--blue);
  line-height: 1.6;
}
.module-list {
  list-style: none;
  margin: 0 0 16px;
  display: grid;
  gap: 6px;
}
.module-list li {
  color: var(--text-light);
  font-size: 0.95rem;
  line-height: 1.75;
  padding: 2px 0 2px 4px;
}
.module-list.num-list li {
  color: var(--navy-700);
  font-weight: 600;
  background: rgba(47, 125, 246, 0.05);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 14px;
}
.module-list.num-list li:hover {
  background: rgba(47, 125, 246, 0.1);
  border-color: #bcd6fb;
}

.step-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy-800);
  margin-bottom: 10px;
  line-height: 1.6;
}
.step-title strong { font-weight: 700; }

.section-dark .section-head { border-bottom-color: rgba(255, 255, 255, 0.2); }
.section-dark .section-head h2 { color: #fff; }

/* 文档下载条 */
.doc-link {
  display: flex;
  justify-content: center;
  margin: 22px 0 4px;
}
.doc-link a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 11px 26px;
  border-radius: 100px;
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  color: var(--navy-800);
  font-weight: 600;
  font-size: 0.92rem;
  transition: all var(--transition);
}
.doc-link a:hover {
  border-color: var(--blue);
  color: var(--blue);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ---------- 图片画廊 ---------- */
.gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin: 20px 0 6px;
}
.gallery-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  cursor: zoom-in;
  transition: transform var(--transition), box-shadow var(--transition);
}
.gallery-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.gallery-item-frame {
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    linear-gradient(135deg, rgba(47, 125, 246, 0.05), rgba(56, 189, 248, 0.05)),
    #fff;
  padding: 14px;
  overflow: hidden;
}
.gallery-item-frame img {
  max-height: 300px;
  width: auto;
  max-width: 100%;
  object-fit: contain;
  border-radius: 6px;
  transition: transform 0.4s ease;
}
.gallery-item:hover .gallery-item-frame img { transform: scale(1.03); }
.gallery-item figcaption {
  text-align: center;
  font-size: 0.84rem;
  color: var(--text-light);
  padding: 10px 14px;
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
  letter-spacing: 0.04em;
}

/* 单图卡片 */
.figure-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  margin-bottom: 22px;
  cursor: zoom-in;
  transition: transform var(--transition), box-shadow var(--transition);
}
.figure-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.figure-card img {
  width: 100%;
  height: auto;
  max-height: 520px;
  object-fit: contain;
  background:
    linear-gradient(135deg, rgba(47, 125, 246, 0.05), rgba(56, 189, 248, 0.05)),
    #fff;
  padding: 16px;
}
.figure-card figcaption {
  text-align: center;
  font-size: 0.84rem;
  color: var(--text-light);
  padding: 10px 14px;
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
}

/* 双图并排(等高画框,等比不裁剪,整齐对齐) */
.figure-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-bottom: 22px;
  align-items: stretch;
}
.figure-row .figure-card {
  margin-bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.figure-row .figure-card img {
  width: 100%;
  height: 400px;
  max-height: none;
  object-fit: contain;
  padding: 18px;
}

/* 灯箱 */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(10, 21, 38, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  backdrop-filter: blur(6px);
}
.lightbox.open { opacity: 1; pointer-events: auto; }
.lightbox img {
  max-width: 92vw;
  max-height: 86vh;
  border-radius: 10px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
  background: #fff;
  padding: 10px;
}
.lightbox-close {
  position: absolute;
  top: 20px;
  right: 26px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font-size: 1.3rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}
.lightbox-close:hover { background: rgba(255, 255, 255, 0.2); }
.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font-size: 1.4rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}
.lightbox-nav:hover { background: rgba(255, 255, 255, 0.2); }
.lightbox-nav.prev { left: 24px; }
.lightbox-nav.next { right: 24px; }

/* ---------- 表格 ---------- */
.table-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 30px 30px;
  box-shadow: var(--shadow);
  margin-bottom: 26px;
  overflow-x: auto;
}
.table-card h3 {
  font-size: 1.12rem;
  font-weight: 800;
  color: var(--navy-800);
  text-align: center;
  margin-bottom: 18px;
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 560px;
}
.data-table thead th {
  background: var(--navy-800);
  color: #fff;
  padding: 12px 16px;
  font-size: 0.92rem;
  font-weight: 700;
  text-align: center;
}
.data-table thead th:first-child { border-radius: 8px 0 0 0; }
.data-table thead th:last-child { border-radius: 0 8px 0 0; }
.data-table tbody th,
.data-table tbody td {
  padding: 12px 16px;
  font-size: 0.92rem;
  color: var(--text-light);
  text-align: center;
  border-bottom: 1px solid var(--bg-alt);
}
.data-table tbody th {
  color: var(--navy-800);
  font-weight: 700;
  background: rgba(47, 125, 246, 0.04);
}
.data-table tbody tr:hover td,
.data-table tbody tr:hover th { background: var(--bg-alt); }
.data-table tbody tr:last-child th { border-radius: 0 0 0 8px; }
.data-table tbody tr:last-child td:last-child { border-radius: 0 0 8px 0; }

/* ---------- 联系区块 ---------- */
/* 浅色背景联系卡片(联系我们页) */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  max-width: 980px;
  margin: 0 auto;
}
.contact-item-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  text-align: center;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 38px 22px 34px;
  box-shadow: var(--shadow);
  transition: all var(--transition);
}
.contact-item-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: #bcd6fb;
}
.contact-item-card:hover .contact-item-icon {
  transform: scale(1.06);
}
.contact-item-icon {
  width: 60px;
  height: 60px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--blue-bright), var(--blue));
  color: #fff;
  box-shadow: 0 10px 22px rgba(47, 125, 246, 0.35);
  transition: transform var(--transition);
}
.contact-item-icon svg { width: 27px; height: 27px; }
.contact-item-card h3 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-light);
  letter-spacing: 0.06em;
}
.contact-item-card p {
  font-size: 1.14rem;
  font-weight: 800;
  color: var(--navy-800);
  word-break: break-all;
  font-variant-numeric: tabular-nums;
}
.contact-item-card.phone-item {
  border-color: rgba(47, 125, 246, 0.4);
  background: linear-gradient(165deg, #ffffff, #f2f8ff);
}
.contact-item-card.phone-item p { color: var(--blue); }
@media (max-width: 720px) {
  .contact-grid { grid-template-columns: 1fr; }
}
.contact-list {
  display: grid;
  gap: 14px;
  max-width: 640px;
  margin: 0 auto;
}
.contact-card {
  display: flex;
  gap: 16px;
  align-items: center;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  padding: 18px 24px;
  color: #fff;
  transition: background var(--transition), transform var(--transition);
}
.contact-card:hover { background: rgba(255, 255, 255, 0.1); transform: translateY(-2px); }
.contact-card.phone-card {
  border-color: rgba(56, 189, 248, 0.45);
  background: rgba(56, 189, 248, 0.1);
}
.contact-icon {
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--blue-bright);
}
.contact-icon svg { width: 24px; height: 24px; }
.contact-card h3 { font-size: 0.9rem; font-weight: 700; margin-bottom: 2px; color: #b9c7d9; }
.contact-card p { font-size: 1.02rem; color: #fff; font-weight: 600; word-break: break-all; }

/* ---------- SEO ---------- */
.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;
}
.seo-tags {
  padding: 34px 0 46px;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
}
.seo-note {
  text-align: center;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: #9aa9ba;
  margin-bottom: 16px;
}
.seo-tag-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  max-width: 960px;
  margin: 0 auto;
}
.seo-tag {
  font-size: 0.78rem;
  color: #8a99ab;
  border: 1px solid var(--border);
  background: #fff;
  padding: 5px 14px;
  border-radius: 100px;
  transition: all var(--transition);
}
.seo-tag:hover {
  color: var(--blue);
  border-color: #bcd6fb;
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--navy-900);
  color: #b9c7d9;
  padding: 46px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 1fr;
  gap: 40px;
  padding-bottom: 36px;
}
.footer-brand .brand-name { color: #fff; font-size: 1.25rem; }
.footer-brand .brand-sub { color: #6f849b; }
.footer-brand p { font-size: 0.86rem; margin-top: 10px; max-width: 320px; color: #8ea2bb; }
.footer-title {
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #6f849b;
  margin-bottom: 14px;
}
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { color: #b9c7d9; font-size: 0.92rem; transition: color var(--transition); }
.footer-links a:hover { color: var(--blue-bright); }
.footer-contact { display: flex; flex-direction: column; gap: 10px; font-size: 0.9rem; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 18px 0;
  text-align: center;
  font-size: 0.8rem;
  color: #6f849b;
}
.footer-bottom a { color: #8ea2bb; }
.footer-bottom a:hover { color: var(--blue-bright); }

/* ---------- 揭示动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible { opacity: 1; transform: none; }

/* ---------- 错误页 ---------- */
.error-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  background:
    radial-gradient(800px 400px at 50% 0%, rgba(47, 125, 246, 0.2), transparent 60%),
    linear-gradient(160deg, var(--navy-800), var(--navy-900));
  color: #fff;
  text-align: center;
  padding: 40px 20px;
}
.error-page h1 {
  font-size: clamp(4rem, 12vw, 7rem);
  font-weight: 800;
  background: linear-gradient(90deg, #38bdf8, #7dd3fc);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: #7dd3fc;
  line-height: 1;
}
.error-page p { font-size: 1.05rem; color: #b9c7d9; }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .product-tabs { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 26px; }
  .card { padding: 26px 22px; }
  .gallery { grid-template-columns: 1fr; }
  .figure-row { grid-template-columns: 1fr; }
  .section { padding: 56px 0; }
  .topbar { flex-wrap: wrap; height: auto; padding: 14px 0; }
}

@media (max-width: 720px) {
  .topbar-right .brand-sub { display: none; }
  .hotline { font-size: 0.85rem; padding: 8px 14px; }
  .nav-toggle { display: flex; }
  .navbar { border-top: none; }
  .nav { flex-wrap: wrap; }
  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    padding-bottom: 10px;
  }
  .nav-list.open { display: flex; }
  .nav-link { padding: 12px 4px; height: auto; }
  .nav-link::after { left: 4px; right: 4px; }
  .slider-track { height: 220px; }
  .slider-arrow { width: 36px; height: 36px; }
  .product-tabs { grid-template-columns: 1fr; }
  .section-head .head-sub { display: none; }
  .gallery-item-frame img { max-height: 240px; }
  .lightbox-nav { width: 40px; height: 40px; }
  .lightbox-nav.prev { left: 10px; }
  .lightbox-nav.next { right: 10px; }
}