/* ===== 全站基础 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --c-bg: #0B1A30;
  --c-bg-2: #0F2240;
  --c-bg-3: #14284A;
  --c-gold: #F0A500;
  --c-gold-2: #FFC04D;
  --c-blue: #5B9BD5;
  --c-blue-2: #7FB3E0;
  --c-text: #FFFFFF;
  --c-text-2: #B8C5D6;
  --c-text-3: #7E8FA8;
  --c-line: rgba(255,255,255,0.08);
  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 20px;
  --shadow: 0 10px 40px rgba(0,0,0,0.4);
}

html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans", sans-serif;
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== 导航栏 ===== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(11, 26, 48, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-line);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.nav-logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; }
.nav-logo img {
  width: 36px; height: 36px; border-radius: 8px;
  object-fit: cover;
  display: block;
}
.nav-logo .mark { display: none; }
.nav-menu { display: flex; gap: 36px; }
.nav-menu a {
  font-size: 14px; color: var(--c-text-2); transition: color .2s;
  position: relative;
}
.nav-menu a:hover, .nav-menu a.active { color: var(--c-gold); }
.nav-menu a.active::after {
  content: ''; position: absolute; bottom: -8px; left: 0; right: 0; height: 2px;
  background: var(--c-gold);
}
.btn-cta {
  background: var(--c-gold); color: var(--c-bg); padding: 10px 20px;
  border-radius: 999px; font-size: 14px; font-weight: 600;
  transition: all .2s; display: inline-flex; align-items: center; gap: 6px;
}
.btn-cta:hover { background: var(--c-gold-2); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(240,165,0,0.3); }

.nav-toggle { display: none; background: none; border: none; color: var(--c-text); font-size: 24px; cursor: pointer; }

/* ===== Hero ===== */
.hero {
  min-height: 100vh; padding: 120px 0 80px;
  background:
    radial-gradient(ellipse at top right, rgba(91,155,213,0.18) 0%, transparent 60%),
    radial-gradient(ellipse at bottom left, rgba(240,165,0,0.12) 0%, transparent 50%),
    var(--c-bg);
  position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; top: -200px; right: -200px; width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(91,155,213,0.15), transparent 70%);
  pointer-events: none;
}
.hero-grid {
  display: grid; grid-template-columns: 1.1fr 1fr; gap: 60px; align-items: center;
  position: relative; z-index: 2;
}
.hero-tag {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px;
  background: rgba(240,165,0,0.1); border: 1px solid rgba(240,165,0,0.3);
  border-radius: 999px; font-size: 13px; color: var(--c-gold); margin-bottom: 24px;
}
.hero-tag .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--c-gold); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }

.hero h1 {
  font-size: 56px; font-weight: 800; line-height: 1.1; margin-bottom: 16px;
  background: linear-gradient(180deg, #fff 0%, #B8C5D6 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero h2 {
  font-size: 28px; font-weight: 700; color: var(--c-gold); margin-bottom: 24px;
  letter-spacing: 1px;
}
.hero-sub { font-size: 17px; color: var(--c-text-2); margin-bottom: 16px; }
.hero-sub2 { font-size: 18px; color: var(--c-text); margin-bottom: 36px; font-weight: 500; }
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; }
.btn-primary {
  background: var(--c-gold); color: var(--c-bg); padding: 14px 32px;
  border-radius: 999px; font-size: 15px; font-weight: 600;
  transition: all .2s;
}
.btn-primary:hover { background: var(--c-gold-2); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(240,165,0,0.4); }
.btn-secondary {
  background: transparent; color: var(--c-text); padding: 14px 32px;
  border: 1px solid rgba(255,255,255,0.2); border-radius: 999px;
  font-size: 15px; font-weight: 500; transition: all .2s;
}
.btn-secondary:hover { border-color: var(--c-gold); color: var(--c-gold); }

.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-visual img {
  width: 100%;
  height: auto;
  max-height: 400px;
  object-fit: contain;
  align-self: center;
  border-radius: var(--r-lg);
  box-shadow: var(--shadow);
  border: 1px solid var(--c-line);
}
.hero-visual::after {
  content: ''; position: absolute; inset: -20px; border-radius: var(--r-lg);
  background: linear-gradient(135deg, var(--c-gold), transparent 50%);
  z-index: -1; opacity: 0.3; filter: blur(40px);
}

/* ===== 数据条 ===== */
.stats {
  padding: 60px 0;
  background: linear-gradient(180deg, var(--c-bg) 0%, var(--c-bg-2) 100%);
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.stat-item { text-align: center; }
.stat-num {
  font-size: 48px; font-weight: 800; color: var(--c-gold);
  font-feature-settings: 'tnum'; letter-spacing: -1px; margin-bottom: 8px;
}
.stat-label { font-size: 14px; color: var(--c-text-2); }

/* ===== 通用 Section ===== */
section { padding: 100px 0; position: relative; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 64px; }
.section-tag {
  display: inline-block; padding: 4px 14px;
  background: rgba(91,155,213,0.1); border: 1px solid rgba(91,155,213,0.3);
  border-radius: 999px; font-size: 12px; color: var(--c-blue);
  letter-spacing: 1px; text-transform: uppercase; margin-bottom: 16px;
}
.section-head h2 { font-size: 40px; font-weight: 700; margin-bottom: 16px; line-height: 1.2; }
.section-head p { font-size: 16px; color: var(--c-text-2); }

/* ===== 客户场景 ===== */
.scenarios-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.scenario-card {
  background: linear-gradient(180deg, var(--c-bg-2), var(--c-bg-3));
  border: 1px solid var(--c-line); border-radius: var(--r-lg);
  padding: 40px; transition: all .3s; position: relative; overflow: hidden;
}
.scenario-card:hover { transform: translateY(-4px); border-color: var(--c-gold); }
.scenario-card::before {
  content: ''; position: absolute; top: 0; right: 0; width: 100px; height: 100px;
  background: radial-gradient(circle, var(--c-gold), transparent 70%); opacity: 0.15;
}
.scenario-icon {
  width: 56px; height: 56px; border-radius: var(--r-md);
  background: linear-gradient(135deg, var(--c-gold), var(--c-gold-2));
  display: flex; align-items: center; justify-content: center;
  font-size: 28px; margin-bottom: 20px; color: var(--c-bg);
}
.scenario-card h3 { font-size: 22px; margin-bottom: 12px; }
.scenario-card p { color: var(--c-text-2); font-size: 15px; margin-bottom: 20px; }
.scenario-card ul li {
  font-size: 14px; color: var(--c-text-2); padding: 6px 0;
  display: flex; align-items: center; gap: 8px;
}
.scenario-card ul li::before { content: '✓'; color: var(--c-gold); font-weight: 700; }

/* ===== 6 大岗位 ===== */
.roles-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.role-card {
  background: var(--c-bg-2); border: 1px solid var(--c-line);
  border-radius: var(--r-md); padding: 32px 24px;
  transition: all .3s; text-align: center; position: relative;
}
.role-card:hover { transform: translateY(-4px); border-color: var(--c-blue); box-shadow: 0 12px 32px rgba(91,155,213,0.15); }
.role-icon {
  width: 64px; height: 64px; margin: 0 auto 16px;
  background: linear-gradient(135deg, var(--c-blue), var(--c-blue-2));
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: 28px;
}
.role-card h3 { font-size: 20px; margin-bottom: 8px; color: var(--c-gold); }
.role-card p { font-size: 14px; color: var(--c-text-2); }

/* ===== 核心技术 ===== */
.tech-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.tech-card {
  background: var(--c-bg-2); border: 1px solid var(--c-line);
  border-radius: var(--r-md); padding: 28px; transition: all .3s;
}
.tech-card:hover { border-color: var(--c-gold); background: var(--c-bg-3); }
.tech-num {
  font-size: 36px; font-weight: 800; color: var(--c-gold);
  font-family: Georgia, serif; opacity: 0.5; margin-bottom: 12px;
}
.tech-card h3 { font-size: 18px; margin-bottom: 10px; }
.tech-card p { font-size: 14px; color: var(--c-text-2); line-height: 1.6; }

/* ===== 创始人 ===== */
.founder-hero { display: grid; grid-template-columns: 1fr 1.4fr; gap: 60px; align-items: center; }
.founder-photo {
  width: 100%; aspect-ratio: 3/4; object-fit: cover;
  border-radius: var(--r-lg); border: 2px solid var(--c-gold);
  box-shadow: var(--shadow);
}
.founder-quote {
  background: linear-gradient(135deg, rgba(240,165,0,0.1), transparent);
  border-left: 3px solid var(--c-gold); padding: 20px 24px; margin: 24px 0;
  font-style: italic; color: var(--c-text); font-size: 18px;
}
.founder-bio { color: var(--c-text-2); font-size: 15px; line-height: 1.8; }
.founder-bio p { margin-bottom: 14px; }
.founder-titles { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.founder-titles span {
  font-size: 12px; padding: 4px 12px; background: rgba(91,155,213,0.15);
  border: 1px solid rgba(91,155,213,0.3); border-radius: 999px; color: var(--c-blue);
}

.timeline { margin-top: 80px; position: relative; }
.timeline::before {
  content: ''; position: absolute; left: 24px; top: 0; bottom: 0; width: 2px;
  background: linear-gradient(180deg, var(--c-gold), var(--c-blue));
}
.tl-item { display: flex; gap: 32px; margin-bottom: 32px; position: relative; }
.tl-dot {
  width: 50px; height: 50px; flex-shrink: 0; border-radius: 50%;
  background: var(--c-bg-2); border: 3px solid var(--c-gold);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; color: var(--c-gold); font-weight: 700;
  z-index: 2; position: relative;
}
.tl-content { flex: 1; padding-top: 8px; }
.tl-content h4 { font-size: 17px; margin-bottom: 6px; color: var(--c-gold); }
.tl-content p { color: var(--c-text-2); font-size: 14px; }

/* ===== 案例 ===== */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card {
  background: var(--c-bg-2); border: 1px solid var(--c-line);
  border-radius: var(--r-md); overflow: hidden; transition: all .3s;
}
.case-card:hover { transform: translateY(-4px); border-color: var(--c-gold); }
.case-img {
  width: 100%; aspect-ratio: 16/9; object-fit: cover;
  background: var(--c-bg-3);
}
.case-body { padding: 24px; }
.case-tag {
  display: inline-block; font-size: 12px; padding: 3px 10px;
  background: rgba(240,165,0,0.15); color: var(--c-gold);
  border-radius: 999px; margin-bottom: 12px;
}
.case-card h3 { font-size: 17px; margin-bottom: 8px; }
.case-card p { font-size: 13px; color: var(--c-text-2); }

/* ===== CTA 区 ===== */
.cta-section {
  text-align: center;
  background:
    radial-gradient(ellipse at center, rgba(240,165,0,0.15) 0%, transparent 70%),
    var(--c-bg-2);
  border-top: 1px solid var(--c-line);
}
.cta-section h2 { font-size: 40px; margin-bottom: 16px; }
.cta-section p { font-size: 17px; color: var(--c-text-2); margin-bottom: 36px; }

/* ===== 产品对比表 ===== */
.compare-table {
  width: 100%; border-collapse: collapse; margin-top: 32px;
  background: var(--c-bg-2); border-radius: var(--r-md); overflow: hidden;
}
.compare-table th, .compare-table td {
  padding: 16px 20px; text-align: left; border-bottom: 1px solid var(--c-line);
  font-size: 14px;
}
.compare-table th { background: var(--c-bg-3); color: var(--c-gold); font-weight: 600; }
.compare-table tr:last-child td { border-bottom: none; }
.compare-table td:first-child { color: var(--c-text-2); font-weight: 500; }

/* ===== 联系页 ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.contact-info-item {
  display: flex; gap: 16px; padding: 20px 0;
  border-bottom: 1px solid var(--c-line);
}
.contact-icon {
  width: 48px; height: 48px; flex-shrink: 0; border-radius: 50%;
  background: linear-gradient(135deg, var(--c-gold), var(--c-gold-2));
  display: flex; align-items: center; justify-content: center; font-size: 20px; color: var(--c-bg);
}
.contact-info-item h4 { font-size: 14px; color: var(--c-text-3); margin-bottom: 4px; font-weight: 500; }
.contact-info-item p { font-size: 16px; color: var(--c-text); }

.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 14px; color: var(--c-text-2); margin-bottom: 8px; }
.form-group input, .form-group textarea {
  width: 100%; padding: 12px 16px; background: var(--c-bg-2);
  border: 1px solid var(--c-line); border-radius: var(--r-sm);
  color: var(--c-text); font-size: 15px; font-family: inherit;
  transition: border-color .2s;
}
.form-group input:focus, .form-group textarea:focus {
  outline: none; border-color: var(--c-gold);
}
.form-group textarea { resize: vertical; min-height: 120px; }

/* ===== 页脚 ===== */
.footer {
  background: var(--c-bg-2); border-top: 1px solid var(--c-line);
  padding: 60px 0 30px; color: var(--c-text-3);
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer h5 { color: var(--c-text); font-size: 15px; margin-bottom: 16px; }
.footer p, .footer a { font-size: 13px; line-height: 1.8; color: var(--c-text-3); }
.footer a:hover { color: var(--c-gold); }
.footer ul li { margin-bottom: 8px; }
.footer-bottom {
  padding-top: 20px; border-top: 1px solid var(--c-line);
  display: flex; justify-content: center;
}
.footer-legal {
  display: flex; align-items: center; gap: 8px;
  font-size: 12px; color: var(--c-text-3); flex-wrap: wrap; justify-content: center;
}
.footer-legal a { color: var(--c-text-3); text-decoration: none; }
.footer-legal a:hover { color: var(--c-gold); }
.footer-sep { opacity: 0.4; }

/* ===== 页面内页头部 ===== */
.page-hero {
  padding: 140px 0 60px; text-align: center;
  background: radial-gradient(ellipse at top, rgba(91,155,213,0.15) 0%, transparent 60%);
  border-bottom: 1px solid var(--c-line);
}
.page-hero h1 { font-size: 44px; margin-bottom: 16px; }
.page-hero p { font-size: 17px; color: var(--c-text-2); max-width: 640px; margin: 0 auto; }

/* ===== 移动端 ===== */
@media (max-width: 968px) {
  .nav-menu { display: none; position: absolute; top: 72px; left: 0; right: 0; background: var(--c-bg-2); flex-direction: column; padding: 20px; gap: 16px; border-bottom: 1px solid var(--c-line); }
  .nav-menu.open { display: flex; }
  .nav-toggle { display: block; }
  .nav-cta-wrap { display: none; }
  .hero-grid, .founder-hero, .contact-grid, .scenarios-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero h1 { font-size: 40px; }
  .hero h2 { font-size: 22px; }
  .section-head h2 { font-size: 30px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .roles-grid, .tech-grid, .case-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .container { padding: 0 20px; }
  section { padding: 70px 0; }
  .hero-visual img { max-height: 360px; }
}
@media (max-width: 560px) {
  .hero { padding: 100px 0 60px; }
  .hero h1 { font-size: 32px; }
  .stat-num { font-size: 36px; }
  .roles-grid, .tech-grid, .case-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .page-hero h1 { font-size: 32px; }
  .cta-section h2 { font-size: 28px; }
  .scenario-card { padding: 28px 22px; }
  .founder-hero { gap: 24px; }
  .founder-quote { font-size: 15px; padding: 16px 18px; }
  .nav-inner { height: 60px; }
  .nav-menu { top: 60px; }
  .compare-table th, .compare-table td { padding: 12px 14px; font-size: 13px; }
  .hero-visual img { max-height: 280px; }
}

/* Tech 架构图 6 列在 Pad/Mobile 改成 3x2 */
@media (max-width: 768px) {
  .arch-grid-6 { grid-template-columns: repeat(3, 1fr) !important; }
  .arch-grid-3 { grid-template-columns: 1fr !important; }
  .voice-grid-3 { grid-template-columns: 1fr !important; }
  .role-detail-grid { grid-template-columns: 1fr !important; gap: 20px !important; }
}