:root {
  --primary: #0497ff;
  --primary-hover: #0089ea;
  --ink: #424c55;
  --ink-deep: #003c66;
  --muted: #8d9399;
  --muted-text: #5f5f5f;
  --line: #e6e9ec;
  --bg-page: #ffffff;
  --bg-section: #f5f7f9;
  --nav-h: 68px;
  --container: 1200px;
  --font: "Noto Sans SC", "Inter", "Microsoft YaHei UI", sans-serif;
  --radius: 8px;
  --radius-lg: 16px;
  --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.06);
}

*, *::before, *::after { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: #0497ff #eef2f6;
}
*::-webkit-scrollbar { width: 8px; height: 8px; }
*::-webkit-scrollbar-track { background: #eef2f6; border-radius: 4px; }
*::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #36a9ff 0%, #0497ff 100%);
  border-radius: 4px;
  border: 2px solid #eef2f6;
}
*::-webkit-scrollbar-thumb:hover { background: #0089ea; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg-page);
  line-height: 1.65;
}
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); }
.nav-container { width: min(var(--container), calc(100% - 32px)); margin-inline: auto; }
.main-offset { padding-top: var(--nav-h); }

/* ===== 导航（对标 Dlabel） ===== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 99;
  background: #fff; height: var(--nav-h);
  box-shadow: 0 -2px 8px rgba(173, 173, 173, 0.15);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between; height: var(--nav-h);
}
.nav-left { display: flex; align-items: center; flex: 1; min-width: 0; }
.logo {
  margin-right: 0; flex-shrink: 0; display: flex; align-items: center; gap: 10px;
  text-decoration: none; transition: opacity 0.2s ease;
}
.nav {
  margin-left: auto;
  padding-left: 48px;
}
.logo:hover { opacity: 0.88; }
.logo-mark {
  display: block; width: 40px; height: 40px; flex-shrink: 0;
}
.logo-text {
  font-size: 18px; font-weight: 700; letter-spacing: -0.03em; line-height: 1;
  color: #1a1a1a;
}

.nav-list {
  display: flex; list-style: none; margin: 0; padding: 0; gap: 0;
}
.nav-list > li { position: relative; height: var(--nav-h); margin-right: 40px; }
.nav-list > li:last-child { margin-right: 0; }
.nav-list a {
  display: block; font-size: 16px; color: var(--ink); line-height: var(--nav-h);
  text-decoration: none; position: relative; white-space: nowrap;
}
.nav-list a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px;
  background: var(--primary); transform: scaleX(0); transition: transform 0.3s ease-out;
}
.nav-list li:hover a,
.nav-list li.active a { color: var(--primary); }
.nav-list li:hover a::after,
.nav-list li.active a::after { transform: scaleX(1); }

.nav-mobile-actions { display: none; gap: 12px; padding-top: 12px; margin-top: 8px; border-top: 1px solid var(--line); }

.nav-right { display: flex; align-items: center; gap: 16px; flex-shrink: 0; margin-left: 28px; }
.lang-picker { position: relative; flex-shrink: 0; }
.lang-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 5px; height: 36px; padding: 0 10px; margin: 0;
  border: none; border-radius: 18px; background: transparent;
  color: #445066; cursor: pointer; flex-shrink: 0;
  transition: background 0.2s ease, color 0.2s ease;
  font-family: inherit;
}
.lang-toggle-ico {
  display: block; width: 18px; height: 18px; flex-shrink: 0;
  fill: none; stroke: currentColor; stroke-width: 1.7;
  stroke-linecap: round; stroke-linejoin: round;
}
.lang-toggle:hover,
.lang-picker.is-open .lang-toggle { background: rgba(4, 151, 255, 0.1); color: var(--primary); }
.lang-toggle:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.lang-toggle-label {
  font-size: 13px; font-weight: 600; line-height: 1; white-space: nowrap;
}
.lang-menu {
  position: absolute; top: calc(100% + 8px); right: 0; z-index: 120;
  min-width: 132px; padding: 6px;
  background: #fff; border: 1px solid var(--line);
  border-radius: 10px; box-shadow: 0 10px 28px rgba(15, 23, 42, 0.12);
}
.lang-menu[hidden] { display: none !important; }
.lang-menu button {
  display: block; width: 100%; padding: 9px 12px; margin: 0;
  border: none; border-radius: 6px; background: transparent;
  color: #334155; font-size: 13px; font-weight: 500; text-align: left;
  cursor: pointer; font-family: inherit;
}
.lang-menu button:hover { background: rgba(4, 151, 255, 0.08); color: var(--primary); }
.lang-menu button.is-active {
  background: rgba(4, 151, 255, 0.12); color: var(--primary); font-weight: 700;
}
.friend-btn {
  width: 120px; height: 36px; line-height: 34px; text-align: center;
  color: var(--primary); border: 1px solid var(--primary); border-radius: 4px;
  font-size: 14px; background: #fff;
}
.friend-btn:hover { background: rgba(4, 151, 255, 0.1); color: var(--primary); }
.download-label {
  display: inline-flex; align-items: center; justify-content: center;
  width: 120px; height: 36px; background: var(--primary); color: #fff !important;
  border-radius: 4px; font-size: 14px; border: none;
}
.download-label:hover { background: var(--primary-hover); color: #fff !important; }
.download-label-lg { width: auto; padding: 0 28px; height: 44px; font-size: 15px; font-weight: 600; }

.nav-toggle {
  display: none; position: relative; z-index: 102;
  width: 42px; height: 42px; padding: 0; margin-right: -6px;
  flex-direction: column; align-items: center; justify-content: center; gap: 6px;
  background: #f4f7fa; border: none; border-radius: 12px; cursor: pointer;
}
.nav-toggle span {
  display: block; width: 18px; height: 2px; border-radius: 2px;
  background: #1a1a1a; transition: transform 0.28s ease, opacity 0.2s ease;
}
.nav-toggle.is-open { background: rgba(4, 151, 255, 0.1); }
.nav-toggle.is-open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
.nav-backdrop { display: none; }

/* ===== 首屏 Banner ===== */
.hero-banner {
  position: relative; overflow: hidden; background: var(--bg-section);
  min-height: max(460px, min(62vh, 580px));
  scroll-margin-top: var(--nav-h);
}
#products,
#advantages,
#solutions,
#services,
#download,
#contact {
  scroll-margin-top: var(--nav-h);
}
.hero-track {
  position: relative;
  min-height: max(460px, min(62vh, 580px));
}
.hero-slide {
  position: absolute; inset: 0;
  opacity: 0; pointer-events: none; z-index: 0;
  transition: opacity 0.55s ease;
}
.hero-slide.is-active {
  opacity: 1; pointer-events: auto; z-index: 1;
}
.hero-banner-bg {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; object-position: 72% center; z-index: 0;
}
.hero-banner-overlay {
  position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(
    105deg,
    rgba(255, 255, 255, 0.96) 0%,
    rgba(255, 255, 255, 0.88) 42%,
    rgba(255, 255, 255, 0.45) 68%,
    rgba(255, 255, 255, 0.12) 100%
  );
}
.hero-banner-inner {
  position: relative; z-index: 2;
  display: flex; align-items: center;
  min-height: max(460px, min(62vh, 580px));
  padding: 56px 0 72px;
}
.hero-banner-copy {
  max-width: min(580px, 94%);
  padding: 32px 36px;
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.95);
  box-shadow: 0 16px 48px rgba(15, 23, 42, 0.08);
}
.hero-banner-kicker,
.hero-banner-copy h1,
.hero-banner-desc,
.hero-banner-actions {
  opacity: 0;
  transform: translateY(22px);
}
.hero-slide.is-active .hero-banner-kicker,
.hero-slide.is-active .hero-banner-copy h1,
.hero-slide.is-active .hero-banner-desc,
.hero-slide.is-active .hero-banner-actions {
  animation: hero-copy-in 0.7s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
.hero-slide.is-active .hero-banner-kicker { animation-delay: 0.08s; }
.hero-slide.is-active .hero-banner-copy h1 { animation-delay: 0.2s; }
.hero-slide.is-active .hero-banner-desc { animation-delay: 0.34s; }
.hero-slide.is-active .hero-banner-actions { animation-delay: 0.48s; }
@keyframes hero-copy-in {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: translateY(0); }
}
@media (prefers-reduced-motion: reduce) {
  .hero-banner-kicker,
  .hero-banner-copy h1,
  .hero-banner-desc,
  .hero-banner-actions {
    opacity: 1; transform: none; animation: none !important;
  }
}
.hero-banner-kicker {
  margin: 0 0 10px; font-size: 14px; font-weight: 600; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--primary);
}
.hero-banner-copy h1 {
  margin: 0 0 14px; font-size: clamp(1.85rem, 3.2vw, 2.5rem); font-weight: 700;
  line-height: 1.25; color: var(--ink-deep);
}
.hero-banner-desc {
  margin: 0 0 28px; font-size: 1.05rem; color: #265a7f; line-height: 1.6;
}
.hero-banner-actions {
  display: flex; flex-wrap: wrap; gap: 12px;
}
.hero-slide--dark .hero-banner-overlay {
  background: linear-gradient(
    105deg,
    rgba(8, 16, 28, 0.88) 0%,
    rgba(8, 16, 28, 0.72) 42%,
    rgba(8, 16, 28, 0.35) 68%,
    rgba(8, 16, 28, 0.12) 100%
  );
}
.hero-slide--dark .hero-banner-copy {
  background: rgba(10, 18, 32, 0.62);
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(12px);
}
.hero-slide--dark .hero-banner-kicker { color: #7dd3fc; }
.hero-slide--dark .hero-banner-copy h1 { color: #f8fafc; }
.hero-slide--dark .hero-banner-desc { color: #cbd5e1; }
.btn-ghost {
  background: transparent; color: #f8fafc; border: 1px solid rgba(255, 255, 255, 0.45);
}
.btn-ghost:hover {
  border-color: #7dd3fc; color: #7dd3fc;
}
.hero-pager {
  position: absolute; left: 50%; bottom: 22px; transform: translateX(-50%);
  z-index: 5; display: flex; align-items: center; gap: 10px;
}
.hero-page {
  width: 10px; height: 10px; padding: 0; border: none; border-radius: 50%;
  background: rgba(197, 205, 212, 0.95);
  box-shadow: 0 1px 4px rgba(15, 23, 42, 0.12);
  cursor: pointer;
  transition: background 0.2s, width 0.2s, border-radius 0.2s;
}
.hero-page:hover { background: #9aa8b4; }
.hero-page.is-active {
  width: 28px; border-radius: 5px; background: var(--primary);
}

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0 32px; height: 44px; border-radius: 4px; font-weight: 600; font-size: 15px;
  text-decoration: none; border: none; cursor: pointer;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); color: #fff; }
.btn-outline-light {
  background: transparent; color: var(--ink-deep); border: 1px solid var(--line);
}
.btn-outline-light:hover { border-color: var(--primary); color: var(--primary); }

/* ===== 产品中心 ===== */
.entry-cards {
  padding: 0 0 72px;
  background: linear-gradient(180deg, #f7fafc 0%, #fff 100%);
}
.entry-section-title { padding-bottom: 16px; }
.entry-cards-lead {
  margin: -4px auto 36px; max-width: 640px; text-align: center;
  font-size: 15px; color: var(--muted); line-height: 1.7;
}
.entry-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; align-items: stretch; }
.entry-card {
  --entry-accent: var(--primary);
  display: flex; flex-direction: column;
  min-height: 0; padding: 0; overflow: hidden;
  border-radius: 18px;
  border: 1px solid rgba(226, 232, 240, 0.95);
  background: #fff;
  color: inherit;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.05);
  transition: transform 0.35s ease, box-shadow 0.35s ease;
}
.entry-card--solo { --entry-accent: #0497ff; }
.entry-card--flagship { --entry-accent: #7c6bf2; }
.entry-card--saas { --entry-accent: #0ea5e9; }
.entry-card--open { --entry-accent: #14b8a6; }
.entry-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 22px 44px color-mix(in srgb, var(--entry-accent) 16%, transparent);
  color: inherit;
}
.entry-visual {
  display: block; aspect-ratio: 16 / 10; overflow: hidden; background: #f3f6f9;
}
.entry-visual img {
  display: block; width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.55s ease;
}
.entry-card:hover .entry-visual img { transform: scale(1.06); }
.entry-body {
  display: flex; flex-direction: column; flex: 1;
  padding: 18px 18px 16px;
}
.entry-card h3 {
  margin: 0 0 8px; font-size: 17px; color: var(--ink-deep); font-weight: 700; line-height: 1.35;
}
.entry-card p {
  margin: 0; font-size: 13px; color: #6b7480; line-height: 1.7;
}

/* ===== 核心优势 ===== */
.section { padding: 0; }
.section-title {
  margin: 0; padding: 72px 0 40px; text-align: center;
  font-size: 40px; font-weight: 700; color: var(--ink);
}
.section-title span {
  position: relative; display: inline-block; padding-bottom: 16px;
}
.section-title span::after {
  content: ""; position: absolute; left: 50%; bottom: 0; transform: translateX(-50%);
  width: 48px; height: 4px; border-radius: 2px; background: var(--primary);
}
.advantages { background: #fff; }
.advantages .section-title { padding-bottom: 12px; }
.advantages-lead {
  margin: 0 auto 36px; text-align: center; white-space: nowrap;
  font-size: 15px; color: var(--muted); line-height: 1.75;
}
.advantage-grid {
  list-style: none; margin: 8px 0 88px; padding: 0;
  display: grid; grid-template-columns: repeat(5, 1fr);
  gap: 48px 28px;
}
.advantage-grid li {
  position: relative;
  text-align: center;
  padding: 8px 12px 4px;
  border-radius: 16px;
  transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}
.advantage-grid li:hover { transform: translateY(-6px); }
.advantage-grid li::before,
.advantage-grid li::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 2px;
  width: 76px;
  height: 76px;
  margin-left: -38px;
  border-radius: 50%;
  pointer-events: none;
}
.advantage-grid li::before {
  background: rgba(4, 151, 255, 0.1);
  transform: scale(0.55);
  opacity: 0;
  transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.35s ease;
}
.advantage-grid li:hover::before { transform: scale(1); opacity: 1; }
.advantage-grid li::after {
  border: 1px solid rgba(4, 151, 255, 0.45);
  opacity: 0;
  transform: scale(0.7);
}
.advantage-grid li:hover::after { animation: adv-ripple 0.75s ease-out; }
@keyframes adv-ripple {
  0% { opacity: 0.55; transform: scale(0.72); }
  100% { opacity: 0; transform: scale(1.38); }
}
.adv-ico {
  position: relative;
  z-index: 1;
  display: block; width: 64px; height: 64px; margin: 0 auto 14px;
  color: #4B5563;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  overflow: visible;
  transition: transform 0.5s cubic-bezier(0.34, 1.35, 0.64, 1), color 0.3s ease;
}
.adv-ico .fill {
  fill: #ECEFF3;
  stroke: currentColor;
  transition: fill 0.3s ease;
}
.advantage-grid li:hover .adv-ico {
  color: var(--primary);
  transform: translateY(-2px) scale(1.08);
}
.advantage-grid li:hover .adv-ico .fill { fill: rgba(4, 151, 255, 0.14); }
.advantage-grid h3 {
  margin: 0 0 8px; font-size: 16px; font-weight: 400; color: #1a1a1a; line-height: 1.4;
  transition: color 0.3s ease;
}
.advantage-grid p {
  margin: 0 auto; max-width: 260px;
  font-size: 13px; color: #8d9399; line-height: 1.65;
  transition: color 0.25s ease;
}
.advantage-grid li:hover h3,
.advantage-grid li:hover p { color: var(--primary); }

/* ===== 行业解决方案横向滑动（贴边起显） ===== */
.industry-solutions { background: var(--bg-section); padding-bottom: 0; }
.industry-solutions .section-title { padding-bottom: 12px; color: var(--ink); }
.industry-lead {
  margin: 0 auto 28px; max-width: 720px; text-align: center;
  font-size: 15px; color: var(--muted); line-height: 1.7;
}
.industry-swiper-wrap {
  position: relative; padding: 0 0 100px;
}
.industry-swiper {
  overflow: hidden; position: relative; width: 100%;
}
.industry-track {
  display: flex; gap: 24px;
  /* 卡片从屏幕左右边缘起显，不再按 1200px 居中缩进 */
  padding: 0 0 24px;
  transition: transform 0.45s ease;
  will-change: transform; cursor: grab; touch-action: none;
}
.industry-track:active { cursor: grabbing; }
.industry-slide {
  flex: 0 0 384px; border-radius: var(--radius-lg); overflow: hidden;
  background: #fff; box-shadow: var(--shadow-card); cursor: default;
}
.industry-slide:hover .industry-img { transform: scale(1.05); }
.industry-img {
  width: 100%; height: 256px; display: block; object-fit: cover;
  transition: transform 0.3s linear;
}
.industry-slide.is-highlight { outline: 2px solid var(--primary); outline-offset: 2px; }
.industry-body { padding: 24px; min-height: 132px; box-sizing: border-box; }
.industry-body h4 {
  margin: 0 0 8px; font-size: 20px; color: var(--ink); font-weight: 700; text-align: left;
}
.industry-body h4.title-only { margin-bottom: 0; font-size: 18px; }
.industry-body p {
  margin: 0; font-size: 14px; line-height: 22px; color: var(--muted); text-align: justify;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.industry-nav {
  position: absolute; bottom: 48px; z-index: 3;
  width: 48px; height: 48px; border: none; border-radius: 50%;
  background: #fff; color: #e6e9ec; font-size: 32px; line-height: 1;
  cursor: pointer; box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  display: flex; align-items: center; justify-content: center;
}
.industry-nav:hover { color: var(--muted); }
.industry-prev { left: 50%; margin-left: -80px; }
.industry-next { left: 50%; margin-left: 32px; }

/* ===== 技术服务：常见问题 ===== */
.service-section {
  padding: 0 0 72px;
  background: #fff;
}
.service-lead {
  margin: -8px auto 36px;
  max-width: 640px;
  text-align: center;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
}
.service-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, #fff 0%, #f8fbfe 100%);
  padding: 24px 22px 20px;
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.04);
}
.service-panel--faq {
  width: 100%;
}
.service-panel-title {
  margin: 0 0 18px;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink-deep);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.faq-list { display: flex; flex-direction: column; gap: 8px; }
.faq-item {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  overflow: hidden;
}
.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 14px 42px 14px 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  position: relative;
  user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--primary);
  font-size: 18px;
  font-weight: 500;
}
.faq-item[open] summary::after { content: "−"; }
.faq-item[open] summary { color: var(--primary); }
.faq-item p {
  margin: 0;
  padding: 0 16px 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}
/* ===== 免费试用表单 ===== */
.download-section {
  position: relative;
  padding: 48px 0 88px;
  overflow: hidden;
  background: #f7fbfe;
}
.download-section::before {
  content: "";
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.82) 0%, rgba(247, 251, 254, 0.88) 45%, rgba(255, 255, 255, 0.9) 100%),
    url("assets/trial-bg.jpg") center / cover no-repeat;
  opacity: 0.9;
  pointer-events: none;
}
.download-section > .nav-container { position: relative; z-index: 1; }
.download-section .section-title { padding-bottom: 12px; }
.trial-lead {
  margin: 0 auto 28px; max-width: 560px; text-align: center;
  font-size: 15px; color: var(--muted); line-height: 1.7;
}
.trial-form {
  max-width: 760px; margin: 0 auto;
  padding: 28px 28px 22px;
  border: 1px solid #e7edf2;
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.05);
}
.trial-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px 18px; }
.trial-field { display: flex; flex-direction: column; gap: 6px; text-align: left; }
.trial-field--wide { grid-column: 1 / -1; }
.trial-field span { font-size: 13px; color: #5c6770; }
.trial-field input,
.trial-field select,
.trial-field textarea {
  width: 100%; margin: 0; padding: 10px 12px;
  border: 1px solid #e1e7ee; border-radius: 8px;
  font: inherit; font-size: 14px; color: var(--ink); background: #fff;
  outline: none;
}
.trial-field textarea { resize: vertical; min-height: 88px; }
.trial-captcha-row { display: flex; gap: 10px; align-items: center; }
.trial-captcha-row input { flex: 1; min-width: 0; }
.trial-captcha-refresh {
  flex-shrink: 0; padding: 0; border: 1px solid #e1e7ee; border-radius: 8px;
  background: #f3f6f9; cursor: pointer; line-height: 0; overflow: hidden;
}
.trial-captcha-refresh img { display: block; width: 132px; height: 44px; object-fit: cover; }
.trial-field input:focus,
.trial-field select:focus,
.trial-field textarea:focus { border-color: var(--primary); }
.trial-actions {
  display: flex; flex-direction: column; align-items: stretch; gap: 12px;
  margin-top: 18px;
}
.trial-actions .btn {
  width: 100%; border: none; cursor: pointer; height: 44px; padding: 0 28px;
  border-radius: 8px; font-size: 15px; font-weight: 600;
}
.trial-msg { margin: 0; font-size: 14px; color: #16a34a; text-align: center; }

.site-header.is-scrolled { box-shadow: 0 4px 20px rgba(173, 173, 173, 0.25); }

/* ===== 页脚 ===== */
.site-footer {
  background: #0a111a;
  color: #c8d0d8;
  padding-top: 56px;
}
.footer-inner { padding-bottom: 40px; }
.footer-sitemap {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr)) minmax(240px, 1.15fr);
  gap: 28px 32px;
  align-items: start;
}
.footer-col-title {
  margin: 0 0 18px;
  font-size: 16px;
  font-weight: 600;
  color: #fff;
}
.footer-col-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-col-list a {
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: color 0.2s;
}
.footer-col-list a:hover { color: #0497ff; }
.footer-col-contact {
  padding-left: 28px;
  border-left: 1px solid rgba(255, 255, 255, 0.14);
}
.footer-contact-block { max-width: 260px; }
.footer-qr {
  width: 120px;
  height: 120px;
  display: block;
  object-fit: contain;
  background: #fff;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 4px;
  padding: 6px;
  box-sizing: border-box;
}
.footer-qr-caption {
  margin: 10px 0 16px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.78);
}
.footer-contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-contact-list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 13px;
  line-height: 1.55;
  color: rgba(255, 255, 255, 0.72);
}
.footer-contact-list img {
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
  margin-top: 2px;
  filter: brightness(0) saturate(100%) invert(55%) sepia(86%) saturate(1945%) hue-rotate(185deg) brightness(101%) contrast(101%);
}
.footer-contact-list a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
}
.footer-contact-list a:hover { color: #0497ff; }
.contact-pop .qr-box {
  width: 100px; height: 100px; margin: 0 auto 8px;
  display: block; object-fit: contain; background: #fff;
  border-radius: 8px; padding: 4px; box-sizing: border-box;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 16px 0 24px;
}
.footer-bottom-inner {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 8px; text-align: center;
}
.footer-bottom p { margin: 0; font-size: 13px; color: rgba(255, 255, 255, 0.45); }
.footer-beian a {
  color: rgba(255, 255, 255, 0.45); text-decoration: none; font-size: 13px;
}
.footer-beian a:hover { color: #0497ff; }

/* ===== 右侧联系栏 ===== */
.contact-window {
  position: fixed; right: 20px; top: 50%; transform: translateY(-50%);
  z-index: 9; width: 56px;
  display: flex; flex-direction: column; align-items: center; gap: 12px;
}
.contact-hero {
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  width: 56px; padding: 14px 6px 16px;
  border-radius: 28px;
  background: linear-gradient(180deg, #36a9ff 0%, #0497ff 55%, #0284e8 100%);
  box-shadow: 0 8px 28px rgba(4, 151, 255, 0.38);
  text-decoration: none; color: #fff !important;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.contact-hero:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(4, 151, 255, 0.45);
  color: #fff !important;
}
.contact-avatar-wrap {
  width: 46px; height: 46px; border-radius: 50%;
  padding: 2px; background: #fff;
  border: 2px dashed rgba(186, 230, 253, 0.95);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  overflow: hidden; flex-shrink: 0;
}
.contact-avatar {
  display: block; width: 100%; height: 100%; object-fit: cover;
  border-radius: 50%;
}
.contact-hero-text {
  writing-mode: vertical-rl; text-orientation: mixed;
  font-size: 13px; font-weight: 600; letter-spacing: 0.35em; line-height: 1;
}
.contact-panel {
  position: relative;
  width: 56px; background: #fff; border-radius: 28px;
  box-shadow: 0 6px 24px rgba(15, 23, 42, 0.1);
  overflow: visible;
}
.contact-panel-link {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 4px; padding: 14px 6px;
  font-size: 12px; color: var(--ink) !important; text-decoration: none;
  position: relative; transition: background 0.2s, color 0.2s;
}
.contact-panel-link:hover {
  background: #f2faff; color: var(--primary) !important;
}
.contact-panel-link + .contact-panel-link::before {
  content: ""; position: absolute; top: 0; left: 50%; transform: translateX(-50%);
  width: 32px; height: 1px; background: var(--line);
}
.contact-panel-ico { display: block; width: 28px; height: 28px; object-fit: contain; }
.contact-pop {
  position: absolute; right: calc(100% + 12px); bottom: 8px;
  width: 140px; padding: 12px;
  background: #fff; border-radius: var(--radius-lg); box-shadow: var(--shadow-card);
  text-align: center; opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity 0.2s, visibility 0.2s;
}
.contact-pop.is-visible {
  opacity: 1; visibility: visible; pointer-events: auto;
}
.contact-pop p { margin: 0; font-size: 12px; color: var(--ink); }
.totop {
  width: 48px; height: 48px; margin: 0;
  display: flex; align-items: center; justify-content: center;
  background: #fff; border: none; border-radius: 50%;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.12);
  cursor: pointer; color: var(--ink);
  transition: color 0.2s, transform 0.2s, box-shadow 0.2s;
}
.totop:hover {
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(4, 151, 255, 0.2);
}
.totop-arrow { font-size: 18px; line-height: 1; }

/* ===== 响应式 ===== */
@media (max-width: 1200px) {
  .nav-list > li { margin-right: 28px; }
}
@media (max-width: 1024px) {
  .nav-list > li { margin-right: 20px; }
  .nav-right { display: none; }
  .advantage-grid { grid-template-columns: repeat(3, 1fr); gap: 36px 16px; }
  .advantages-lead { margin-bottom: 28px; white-space: normal; }
  .entry-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-banner-inner { justify-content: center; }
  .hero-banner-copy { margin-inline: auto; }
  .hero-banner-bg { object-position: center; }
  .footer-sitemap {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px 24px;
  }
  .footer-col-contact {
    grid-column: 1 / -1;
    padding-left: 0;
    padding-top: 8px;
    border-left: none;
    border-top: 1px solid rgba(255, 255, 255, 0.14);
  }
}
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-backdrop {
    display: block; position: fixed; z-index: 97;
    inset: var(--nav-h) 0 0 0;
    background: rgba(5, 12, 22, 0.55);
    opacity: 0; pointer-events: none;
    transition: opacity 0.28s ease;
  }
  .nav-backdrop.is-visible { opacity: 1; pointer-events: auto; }
  .nav {
    display: flex; flex-direction: column;
    position: fixed; z-index: 101;
    top: var(--nav-h); left: 0; right: 0; bottom: 0;
    padding: 0; margin: 0; padding-left: 0;
    background: #0f1720;
    border: none; border-radius: 0;
    box-shadow: none; overflow-y: auto;
    transform: translateY(-8px); opacity: 0; pointer-events: none;
    transition: transform 0.28s ease, opacity 0.28s ease;
  }
  .nav.is-open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-list {
    flex: 1; flex-direction: column; align-items: stretch;
    margin: 8px 0 0; padding: 0;
  }
  .nav-list > li { height: auto; margin: 0; border-bottom: 1px solid rgba(255, 255, 255, 0.08); }
  .nav-list a {
    display: flex; align-items: center; justify-content: center;
    min-height: 56px; padding: 0 20px; line-height: 1.3;
    font-size: 16px; font-weight: 400; color: #e8eef4; text-align: center;
  }
  .nav-list a::after { content: none; display: none; transform: none; }
  .nav-list li.active a,
  .nav-list a:active { background: transparent; color: var(--primary); }
  .nav-mobile-actions {
    display: flex; flex-direction: column; align-items: center; gap: 16px;
    margin: 0; padding: 20px 20px 28px;
    border-top: none;
  }
  .nav-mobile-phone {
    color: #d5dee8; font-size: 15px; text-decoration: none;
  }
  .nav-mobile-phone:hover { color: #fff; }
  .nav-mobile-btns {
    display: flex; width: 100%; gap: 10px;
  }
  .nav-mobile-actions .friend-btn,
  .nav-mobile-actions .download-label {
    flex: 1; width: auto; height: 44px; line-height: 42px;
    border-radius: 22px; font-weight: 600;
  }
  .nav-mobile-actions .friend-btn {
    background: transparent; color: #fff; border-color: rgba(255, 255, 255, 0.35);
  }
  .lang-picker--mobile { width: 100%; }
  .lang-toggle--mobile {
    width: 100%; height: 44px; gap: 8px; padding: 0 18px;
    border-radius: 22px; border: 1px solid rgba(255, 255, 255, 0.28);
    color: #e8eef4; background: rgba(255, 255, 255, 0.06);
  }
  .lang-toggle--mobile:hover,
  .lang-picker--mobile.is-open .lang-toggle--mobile {
    background: rgba(4, 151, 255, 0.25); color: #fff;
  }
  .lang-picker--mobile .lang-menu {
    position: static; margin-top: 10px; width: 100%;
    background: rgba(255, 255, 255, 0.08); border-color: rgba(255, 255, 255, 0.16);
    box-shadow: none;
  }
  .lang-picker--mobile .lang-menu button { color: #e8eef4; text-align: center; }
  .lang-picker--mobile .lang-menu button:hover,
  .lang-picker--mobile .lang-menu button.is-active {
    background: rgba(4, 151, 255, 0.28); color: #fff;
  }
  body.nav-open { overflow: hidden; }
  .entry-grid { grid-template-columns: 1fr; }
  .section-title { font-size: 28px; padding-top: 48px; }
  .industry-slide { flex: 0 0 min(320px, 85vw); }
  .industry-img { height: 200px; }
  .contact-window { display: none; }
  .trial-grid { grid-template-columns: 1fr; }
  .trial-form { padding: 22px 16px 18px; }
  .footer-sitemap { grid-template-columns: 1fr 1fr; }
  .footer-bottom-inner { justify-content: center; text-align: center; }
}