:root {
  --bg-dark: #05030b;
  --bg-section: #0d0718;
  --primary: #7c4dff;
  --primary-soft: #a27dff;
  --accent: #35c6ff;
  --text-main: #f5f5f7;
  --text-sub: #b3b3c2;
  --border-soft: rgba(255,255,255,0.06);
  --radius-xl: 18px;
  --radius-xxl: 26px;
  --shadow-soft: 0 18px 45px rgba(0,0,0,0.45);
  --max-width: 1120px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: radial-gradient(circle at top, #271047 0, #05030b 42%, #05030b 100%);
  color: var(--text-main);
  line-height: 1.6;
  scroll-behavior: smooth;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 16px;
}

/* Header / Nav */

header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(22px);
  background: linear-gradient(to bottom, rgba(5,3,11,0.96), rgba(5,3,11,0.82));
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  gap: 16px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-logo-icon {
  width: 34px;
  height: 34px;
  border-radius: 14px;
  background: radial-gradient(circle at 20% 20%, #ffffff 0%, #fff0 40%),
    linear-gradient(135deg, #35c6ff, #7c4dff);
  box-shadow: 0 0 22px rgba(124,77,255,0.8);
}

.nav-logo-text-title {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.04em;
}

.nav-logo-text-sub {
  font-size: 11px;
  color: var(--text-sub);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 14px;
}

.nav-menu a {
  padding: 6px 4px;
  border-radius: 999px;
  color: var(--text-sub);
  position: relative;
  transition: color 0.2s ease;
}

.nav-menu a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, #35c6ff, #7c4dff);
  transform: translateX(-50%);
  transition: width 0.2s ease;
}

.nav-menu a:hover {
  color: var(--text-main);
}
.nav-menu a:hover::after {
  width: 18px;
}

.nav-menu a.active {
  color: var(--text-main);
}
.nav-menu a.active::after {
  width: 24px;
}

.nav-cta-link {
  padding: 6px 14px;
  font-size: 13px;
  border-radius: 999px;
  background: linear-gradient(120deg, #7c4dff, #35c6ff);
  border: none;
  color: #fff;
  cursor: pointer;
  box-shadow: 0 0 12px rgba(53,198,255,0.4);
}

.nav-toggle {
  display: none;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  border: 1px solid var(--border-soft);
  background: rgba(10,6,24,0.8);
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.nav-toggle-line {
  width: 16px;
  height: 2px;
  background: var(--text-main);
  border-radius: 999px;
  position: relative;
}
.nav-toggle-line::before,
.nav-toggle-line::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: var(--text-main);
  border-radius: 999px;
}
.nav-toggle-line::before { top: -5px; }
.nav-toggle-line::after  { top: 5px; }

@media (max-width: 768px) {
  .nav-menu,
  .nav-cta-link {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-menu.mobile-open {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    background: rgba(5,3,11,0.98);
    position: absolute;
    left: 0;
    right: 0;
    top: 56px;
    padding: 12px 18px 16px;
    border-bottom: 1px solid var(--border-soft);
  }

  .nav-menu.mobile-open a {
    width: 100%;
    padding: 8px 0;
  }

  .nav-menu.mobile-open + .nav-cta-link {
    display: inline-flex;
    margin: 8px 18px 12px auto;
  }
}

/* Sections & Generic */

section {
  padding: 56px 0;
}
section.alt-bg {
  background: radial-gradient(circle at top left, #1a0e33 0, #05030b 55%);
}

.section-header {
  text-align: center;
  margin-bottom: 30px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid rgba(124,77,255,0.5);
  font-size: 11px;
  color: var(--primary-soft);
  background: rgba(124,77,255,0.12);
}

.section-title {
  font-size: 26px;
  margin-top: 10px;
  margin-bottom: 6px;
}

.section-subtitle {
  font-size: 13px;
  color: var(--text-sub);
}

/* Hero */

.page-hero {
  padding: 40px 0 52px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 32px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.08);
  background: radial-gradient(circle at left, rgba(53,198,255,0.18), rgba(7,3,18,0.96));
  font-size: 11px;
  color: var(--accent);
  margin-bottom: 10px;
}

.hero-title {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 8px;
}

.hero-highlight {
  background: linear-gradient(90deg, #35c6ff, #ec6fff);
  -webkit-background-clip: text;
  color: transparent;
}

.hero-desc {
  font-size: 14px;
  color: var(--text-sub);
  margin-bottom: 20px;
  max-width: 460px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}

.btn-primary {
  padding: 10px 18px;
  border-radius: 999px;
  border: none;
  background: linear-gradient(120deg, #7c4dff, #35c6ff);
  color: #fff;
  font-size: 14px;
  cursor: pointer;
  box-shadow: 0 12px 30px rgba(53,198,255,0.45);
}

.btn-secondary {
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.16);
  background: rgba(8,5,18,0.9);
  color: var(--text-main);
  font-size: 13px;
  cursor: pointer;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 11px;
  color: var(--text-sub);
}
.hero-meta span::before {
  content: "• ";
  color: var(--accent);
}

/* Hero visual */

.hero-visual {
  position: relative;
  border-radius: var(--radius-xxl);
  padding: 16px;
  background: radial-gradient(circle at top left, rgba(53,198,255,0.35), rgba(10,6,24,0.96));
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  min-height: 230px;
}

.hero-orbit {
  position: absolute;
  inset: 18px;
  border-radius: 999px;
  border: 1px dashed rgba(255,255,255,0.18);
  opacity: 0.55;
}

.hero-chip {
  position: absolute;
  padding: 6px 10px;
  font-size: 11px;
  border-radius: 999px;
  background: rgba(5,3,11,0.9);
  border: 1px solid rgba(255,255,255,0.18);
  backdrop-filter: blur(12px);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero-chip-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: radial-gradient(circle, #35c6ff, #7c4dff);
  box-shadow: 0 0 10px rgba(53,198,255,0.9);
}

.chip-1 { top: 26px; left: 26px; }
.chip-2 { top: 26px; right: 26px; }
.chip-3 { bottom: 26px; left: 36px; }

.hero-central-card {
  position: absolute;
  inset: 60px 52px;
  border-radius: 18px;
  background: radial-gradient(circle at top, rgba(111,207,255,0.2), rgba(5,3,11,0.98));
  border: 1px solid rgba(255,255,255,0.16);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  font-size: 11px;
}

.hero-central-title {
  font-size: 13px;
  margin-bottom: 4px;
}

.hero-central-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
}
.hero-central-tags span {
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.18);
  color: var(--text-sub);
}

.hero-central-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 10px;
  color: var(--text-sub);
}
.hero-central-pill {
  padding: 3px 8px;
  border-radius: 999px;
  background: rgba(124,77,255,0.24);
  color: var(--primary-soft);
  border: 1px solid rgba(124,77,255,0.6);
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: minmax(0, 1fr);
  }
  .hero-desc {
    max-width: none;
  }
  .hero-visual {
    min-height: 210px;
  }
}

@media (max-width: 600px) {
  .page-hero {
    padding-top: 30px;
  }
  .hero-title {
    font-size: 26px;
  }
  .hero-visual {
    display: none;
  }
}

/* Solutions cards */

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.solution-card {
  background: rgba(8,5,18,0.96);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-soft);
  padding: 16px 16px 14px;
  box-shadow: 0 14px 36px rgba(0,0,0,0.45);
  position: relative;
  overflow: hidden;
}
.solution-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top left, rgba(53,198,255,0.15), transparent 55%);
  opacity: 0.8;
  pointer-events: none;
}

.solution-tag {
  font-size: 11px;
  color: var(--accent);
  margin-bottom: 4px;
}
.solution-title {
  font-size: 18px;
  margin-bottom: 4px;
}
.solution-desc {
  font-size: 13px;
  color: var(--text-sub);
  margin-bottom: 8px;
}
.solution-list {
  font-size: 12px;
  color: var(--text-sub);
  margin-left: 16px;
  margin-bottom: 10px;
}
.solution-list li {
  margin-bottom: 4px;
}
.solution-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  color: var(--text-sub);
}
.solution-link {
  font-size: 12px;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.solution-link span {
  font-size: 14px;
}

@media (max-width: 768px) {
  .solutions-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* Breadcrumb */

.breadcrumb {
  font-size: 11px;
  color: var(--text-sub);
  margin-bottom: 10px;
}
.breadcrumb a {
  color: var(--accent);
}

/* Detail layout */

.detail-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.9fr);
  gap: 24px;
  align-items: flex-start;
}
.detail-side-card {
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-soft);
  background: rgba(8,5,18,0.96);
  padding: 14px 16px;
  box-shadow: var(--shadow-soft);
  font-size: 12px;
  color: var(--text-sub);
}
.detail-section-title {
  font-size: 18px;
  margin-bottom: 8px;
}
.detail-paragraph {
  font-size: 13px;
  color: var(--text-sub);
  margin-bottom: 8px;
}
.detail-subheading {
  font-size: 14px;
  margin: 10px 0 4px;
}
.detail-list {
  font-size: 13px;
  color: var(--text-sub);
  margin-left: 16px;
  margin-bottom: 6px;
}
.detail-list li {
  margin-bottom: 3px;
}

@media (max-width: 900px) {
  .detail-layout {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* Download / FAQ reused */

.download-card {
  background: rgba(8,5,18,0.96);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-soft);
  padding: 16px;
  box-shadow: var(--shadow-soft);
}
.badge-soft {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(124,77,255,0.18);
  color: var(--primary-soft);
  font-size: 11px;
  margin-bottom: 8px;
}

/* FAQ */

.faq-item {
  border-radius: 10px;
  border: 1px solid var(--border-soft);
  background: rgba(8,5,18,0.96);
  margin-bottom: 8px;
  overflow: hidden;
}
.faq-item summary {
  list-style: none;
  padding: 8px 10px;
  font-size: 13px;
  cursor: pointer;
  position: relative;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-sub);
  font-size: 14px;
}
.faq-item[open] summary::after {
  content: "–";
}
.faq-item p {
  padding: 4px 10px 10px;
  font-size: 12px;
  color: var(--text-sub);
}

/* News list (可以以后复用) */

.news-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}
.news-card {
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-soft);
  background: rgba(8,5,18,0.96);
  padding: 12px 14px;
}
.news-source {
  font-size: 11px;
  color: var(--text-sub);
  margin-bottom: 2px;
}
.news-title {
  font-size: 14px;
  margin-bottom: 4px;
}
.news-link {
  font-size: 12px;
  color: var(--accent);
  word-break: break-all;
}

/* Contact */

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 24px;
}
.contact-card {
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-soft);
  background: rgba(8,5,18,0.96);
  padding: 14px 16px;
  box-shadow: var(--shadow-soft);
}
.contact-block {
  margin-bottom: 10px;
  font-size: 13px;
}
.contact-block h4 {
  font-size: 14px;
  margin-bottom: 4px;
}
.contact-block p {
  color: var(--text-sub);
}
.contact-block a {
  color: var(--accent);
}
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 13px;
}
.contact-form label {
  font-size: 12px;
  color: var(--text-sub);
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 7px 9px;
  border-radius: 9px;
  border: 1px solid rgba(255,255,255,0.16);
  background: rgba(9,6,20,0.98);
  color: var(--text-main);
  font-family: inherit;
  font-size: 13px;
}
.contact-form textarea {
  min-height: 90px;
  resize: vertical;
}
.contact-form button {
  align-self: flex-start;
  margin-top: 4px;
}
@media (max-width: 900px) {
  .contact-layout {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* Footer */

footer {
  padding: 22px 0 26px;
  border-top: 1px solid var(--border-soft);
  background: #05030b;
  font-size: 11px;
  color: var(--text-sub);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
}
.footer-links {
  display: flex;
  gap: 12px;
}
.footer-links a {
  color: var(--text-sub);
}

/* Image styles for solution pages */
.solution-image {
  width: 100%;
  max-width: 600px;
  height: auto;
  border-radius: var(--radius-xl);
  margin: 20px auto;
  display: block;
  box-shadow: var(--shadow-soft);
}

.hero-image-section {
  text-align: center;
  margin: 30px 0;
}

.hero-image {
  width: 100%;
  max-width: 800px;
  height: auto;
  border-radius: var(--radius-xxl);
  box-shadow: var(--shadow-soft);
  margin: 0 auto;
}

.image-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin: 30px 0;
}

.gallery-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-soft);
  transition: transform 0.3s ease;
}

.gallery-image:hover {
  transform: scale(1.05);
}

.image-with-text {
  display: flex;
  align-items: center;
  gap: 30px;
  margin: 30px 0;
}

.image-with-text img {
  width: 50%;
  max-width: 400px;
  height: auto;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-soft);
}

.image-with-text .text-content {
  flex: 1;
}

@media (max-width: 768px) {
  .image-with-text {
    flex-direction: column;
  }
  
  .image-with-text img {
    width: 100%;
  }
  
  .image-gallery {
    grid-template-columns: 1fr;
  }
}

/* 二维码样式 */
.qr-code-container {
  text-align: center;
  margin: 15px 0;
}

.qr-code {
  width: 150px;
  height: 150px;
  border-radius: 12px;
  border: 2px solid var(--border-soft);
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.qr-placeholder {
  width: 150px;
  height: 150px;
  border-radius: 12px;
  border: 2px dashed var(--border-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-sub);
  font-size: 12px;
  margin: 0 auto;
  background: rgba(255,255,255,0.02);
}