/* ===================== 基础 ===================== */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --accent: #38bdf8;
  --purple: #7c3aed;
  --dark: #0a1628;
  --dark-2: #0d1f3c;
  --text: #1f2937;
  --text-2: #6b7280;
  --bg: #ffffff;
  --bg-alt: #f5f8fc;
  --border: #e5e7eb;
  --radius: 14px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: var(--bg);
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
a { text-decoration: none; }
ul { list-style: none; }

/* ===================== 顶部条 ===================== */
.topbar { background: var(--dark); color: rgba(255,255,255,0.85); font-size: 13px; padding: 8px 0; }
.topbar-inner { display: flex; align-items: center; gap: 10px; }
.topbar-text i { color: var(--accent); margin-right: 6px; }
.topbar-contacts { margin-left: auto; display: flex; gap: 24px; }
.topbar-contacts a { color: rgba(255,255,255,0.85); transition: color .2s; }
.topbar-contacts a:hover { color: var(--accent); }
.topbar-contacts i { margin-right: 6px; }
@media (max-width: 768px) { .topbar-text { display: none; } .topbar-contacts { margin-left: 0; gap: 16px; } }

/* ===================== 导航 ===================== */
.navbar {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.95); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border); transition: box-shadow .3s;
}
.navbar.scrolled { box-shadow: 0 4px 20px rgba(0,0,0,0.08); }
.nav-inner { display: flex; align-items: center; height: 72px; gap: 32px; }
.logo { display: flex; align-items: center; gap: 12px; }
.logo-img { width: 56px; height: 56px; display: block; object-fit: contain; flex-shrink: 0; }
.logo-icon {
  width: 44px; height: 44px; border-radius: 11px;
  background: linear-gradient(135deg, var(--primary), var(--purple));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 20px;
}
.logo-text { display: flex; flex-direction: column; justify-content: center; }
.logo-main { font-size: 22px; font-weight: 800; color: var(--text); line-height: 1.15; letter-spacing: 4px; white-space: nowrap; }
.logo-sub { font-size: 9px; letter-spacing: -1px; color: var(--text-2); line-height: 1.3; white-space: nowrap; }
.nav-menu { display: flex; gap: 26px; margin-left: auto; }
.nav-link { color: var(--text-2); font-size: 15px; font-weight: 500; padding: 6px 2px; position: relative; transition: color .2s; }
.nav-link::after { content: ""; position: absolute; left: 0; bottom: 0; width: 0; height: 2px; background: var(--primary); transition: width .25s; }
.nav-link:hover, .nav-link.active { color: var(--primary); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.btn-consult {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--primary); color: #fff; padding: 10px 20px;
  border-radius: 8px; font-size: 14px; font-weight: 600; transition: background .2s;
}
.btn-consult:hover { background: var(--primary-dark); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 5px; padding: 6px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--text); transition: .3s; }
@media (max-width: 960px) {
  .nav-menu {
    display: none; position: absolute; top: 72px; left: 0; right: 0;
    background: #fff; flex-direction: column; padding: 16px 24px;
    border-bottom: 1px solid var(--border); gap: 16px;
  }
  .nav-menu.open { display: flex; }
  .nav-toggle { display: flex; }
}

/* ===================== Hero ===================== */
.hero {
  position: relative; overflow: hidden;
  background: var(--dark);
  padding: 96px 0 80px;
}
.hero-bg { position: absolute; inset: 0; }
.hero-glow { position: absolute; border-radius: 50%; filter: blur(90px); }
.glow-1 { width: 480px; height: 480px; top: -140px; right: -100px; background: rgba(37,99,235,0.28); }
.glow-2 { width: 420px; height: 420px; bottom: -160px; left: -120px; background: rgba(124,58,237,0.22); }
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(56,189,248,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56,189,248,0.05) 1px, transparent 1px);
  background-size: 48px 48px;
}
.hero .container { position: relative; z-index: 2; }
.hero-main { max-width: 860px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(56,189,248,0.1); color: var(--accent);
  border: 1px solid rgba(56,189,248,0.3);
  font-size: 13px; font-weight: 600; padding: 7px 16px; border-radius: 99px;
  margin-bottom: 28px;
}
.hero-title {
  font-size: 56px; font-weight: 800; line-height: 1.2; letter-spacing: -1px;
  color: #fff; margin-bottom: 22px;
}
.gradient-text {
  background: linear-gradient(90deg, var(--accent), #a78bfa);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-desc { font-size: 17px; color: rgba(255,255,255,0.7); max-width: 620px; margin-bottom: 44px; }

/* 业务入口卡片 */
.hero-entries { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; max-width: 980px; margin-bottom: 56px; }
.entry-card {
  display: flex; gap: 18px; padding: 26px 24px;
  border-radius: 16px; transition: all .3s;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.04);
  backdrop-filter: blur(8px);
}
.entry-card:hover { transform: translateY(-4px); }
.entry-si:hover { border-color: rgba(56,189,248,0.6); background: rgba(56,189,248,0.08); }
.entry-ai:hover { border-color: rgba(167,139,250,0.6); background: rgba(124,58,237,0.1); }
.entry-ops:hover { border-color: rgba(45,212,191,0.6); background: rgba(45,212,191,0.08); }
.entry-case:hover { border-color: rgba(251,191,36,0.6); background: rgba(251,191,36,0.08); }
.entry-icon {
  width: 56px; height: 56px; border-radius: 14px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center; font-size: 24px;
}
.entry-si .entry-icon { background: rgba(56,189,248,0.15); color: var(--accent); }
.entry-ai .entry-icon { background: rgba(124,58,237,0.2); color: #a78bfa; }
.entry-ops .entry-icon { background: rgba(45,212,191,0.15); color: #2dd4bf; }
.entry-case .entry-icon { background: rgba(251,191,36,0.15); color: #fbbf24; }
.entry-body h3 { color: #fff; font-size: 18px; font-weight: 700; margin-bottom: 6px; }
.entry-body p { color: rgba(255,255,255,0.6); font-size: 13.5px; margin-bottom: 12px; }
.entry-go { font-size: 13.5px; font-weight: 600; display: inline-flex; align-items: center; gap: 6px; transition: gap .2s; }
.entry-si .entry-go { color: var(--accent); }
.entry-ai .entry-go { color: #a78bfa; }
.entry-ops .entry-go { color: #2dd4bf; }
.entry-case .entry-go { color: #fbbf24; }
.entry-card:hover .entry-go { gap: 10px; }

.hero-stats { display: flex; align-items: center; gap: 36px; flex-wrap: wrap; }
.hstat-num { font-size: 36px; font-weight: 800; color: #fff; }
.hstat-unit { font-size: 20px; font-weight: 700; color: var(--accent); margin-left: 2px; }
.hstat-label { font-size: 13px; color: rgba(255,255,255,0.5); margin-top: 2px; }
.hstat-divider { width: 1px; height: 44px; background: rgba(255,255,255,0.14); }
@media (max-width: 768px) {
  .hero { padding: 64px 0 56px; }
  .hero-title { font-size: 36px; }
  .hero-entries { grid-template-columns: 1fr; }
  .hero-stats { gap: 22px; }
  .hstat-divider { display: none; }
}

/* ===================== 信任条 ===================== */
.trustbar { background: #fff; position: relative; z-index: 10; }
.trust-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  background: #fff; border-radius: var(--radius);
  box-shadow: 0 16px 48px rgba(10,22,40,0.12);
  overflow: hidden; margin-top: -40px;
}
.trust-item {
  display: flex; align-items: center; gap: 15px; padding: 26px 22px;
  border-right: 1px solid var(--border); transition: background .25s;
}
.trust-item:last-child { border-right: none; }
.trust-item:hover { background: var(--bg-alt); }
.trust-item > i {
  width: 50px; height: 50px; border-radius: 12px; flex-shrink: 0;
  background: linear-gradient(135deg, rgba(37,99,235,0.1), rgba(124,58,237,0.1));
  color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 21px;
}
.trust-item h4 { font-size: 15px; font-weight: 700; margin-bottom: 3px; }
.trust-item p { font-size: 12.5px; color: var(--text-2); }
@media (max-width: 900px) {
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-item:nth-child(2) { border-right: none; }
  .trust-item:nth-child(1), .trust-item:nth-child(2) { border-bottom: 1px solid var(--border); }
}
@media (max-width: 520px) {
  .trust-grid { grid-template-columns: 1fr; }
  .trust-item { border-right: none; border-bottom: 1px solid var(--border); }
  .trust-item:last-child { border-bottom: none; }
}

/* ===================== 版块通用 ===================== */
section { padding: 96px 0; }
.section-header { text-align: center; margin-bottom: 56px; }
.section-badge {
  display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: 2.5px;
  color: var(--primary); background: rgba(37,99,235,0.08);
  padding: 6px 18px; border-radius: 99px; margin-bottom: 16px;
}
.section-title { font-size: 38px; font-weight: 800; letter-spacing: -0.5px; }
.section-title.light { color: #fff; }
.section-line { display: flex; justify-content: center; margin: 18px 0; }
.section-line span { width: 56px; height: 4px; border-radius: 99px; background: linear-gradient(90deg, var(--primary), var(--purple)); }
.section-line.text-left { justify-content: flex-start; }
.section-title.text-left { text-align: left; }
.section-desc { font-size: 16px; color: var(--text-2); max-width: 620px; margin: 0 auto; }
.light-desc { color: rgba(255,255,255,0.6); }
@media (max-width: 768px) { section { padding: 64px 0; } .section-title { font-size: 28px; } }

/* ===================== 系统集成卡片（浅色） ===================== */
.services { background: var(--bg-alt); }
.services-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.service-card {
  background: #fff; border-radius: var(--radius); padding: 30px 24px;
  border: 1px solid var(--border);
  transition: all .3s; opacity: 0; transform: translateY(24px);
}
.service-card.visible, .ai-card.visible, .case-card.visible, .why-card.visible { opacity: 1; transform: translateY(0); }
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 40px rgba(10,22,40,0.1);
  border-color: transparent;
}
.service-icon-wrap {
  width: 56px; height: 56px; border-radius: 14px;
  background: color-mix(in srgb, var(--color) 12%, white);
  color: var(--color);
  display: flex; align-items: center; justify-content: center;
  font-size: 23px; margin-bottom: 18px; transition: all .3s;
}
.service-card:hover .service-icon-wrap { background: var(--color); color: #fff; }
.service-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 9px; }
.service-card > p { font-size: 13.5px; color: var(--text-2); margin-bottom: 15px; }
.service-features li {
  font-size: 13px; color: var(--text-2); padding: 4px 0;
  display: flex; align-items: center; gap: 8px;
}
.service-features li i { color: #059669; font-size: 11px; }
@media (max-width: 1100px) { .services-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .services-grid { grid-template-columns: 1fr; } }

/* ===================== AI 版块（深色玻璃拟态） ===================== */
.ai-section {
  background: linear-gradient(180deg, #0d1f3c 0%, #0a1628 100%);
  position: relative; overflow: hidden;
}
.ai-section::before {
  content: ""; position: absolute; top: -100px; left: 50%; transform: translateX(-50%);
  width: 700px; height: 400px; border-radius: 50%;
  background: radial-gradient(ellipse, rgba(124,58,237,0.14), transparent 70%);
}
.ai-badge { color: #a78bfa; background: rgba(124,58,237,0.15); }
.ai-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; position: relative; z-index: 2; }
.ai-card {
  position: relative; overflow: hidden;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 18px; padding: 34px 28px;
  backdrop-filter: blur(8px);
  transition: all .3s; opacity: 0; transform: translateY(24px);
}
.ai-card:hover {
  background: rgba(255,255,255,0.07);
  border-color: rgba(124,58,237,0.5);
  transform: translateY(-6px);
  box-shadow: 0 20px 44px rgba(0,0,0,0.35);
}
.ai-card-glow {
  position: absolute; top: -60px; right: -60px;
  width: 160px; height: 160px; border-radius: 50%;
  background: radial-gradient(circle, rgba(124,58,237,0.25), transparent 70%);
  pointer-events: none;
}
.ai-card h3 { color: #fff; font-size: 19px; font-weight: 700; margin-bottom: 10px; }
.ai-card > p { font-size: 13.5px; color: rgba(255,255,255,0.6); margin-bottom: 16px; }
.ai-card .service-features li { color: rgba(255,255,255,0.65); }
.ai-card .service-features li i { color: #34d399; }
.ai-scenario {
  margin-top: 18px; padding-top: 16px;
  border-top: 1px dashed rgba(255,255,255,0.12);
  font-size: 12px; color: var(--accent);
}
/* AI 分组标签 */
.ai-group { margin-bottom: 48px; position: relative; z-index: 2; }
.ai-group:last-child { margin-bottom: 0; }
.ai-group-label {
  display: flex; align-items: center; gap: 12px; margin-bottom: 24px;
}
.ai-group-label i { font-size: 18px; color: #a78bfa; }
.ai-group-label span { font-size: 17px; font-weight: 700; color: #fff; }
.ai-group-label em { font-size: 13px; color: rgba(255,255,255,0.45); font-style: normal; }

@media (max-width: 1000px) { .ai-grid { grid-template-columns: 1fr; } }

/* ===================== 项目场景 ===================== */
.cases-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.case-card {
  background: #fff; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border);
  transition: all .3s; opacity: 0; transform: translateY(24px);
}
.case-card:hover { transform: translateY(-5px); box-shadow: 0 18px 44px rgba(10,22,40,0.12); }
.case-head {
  position: relative; height: 130px;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 44px;
}
.case-tag {
  position: absolute; top: 14px; left: 14px;
  font-size: 11.5px; font-weight: 600; color: #fff;
  background: rgba(255,255,255,0.18); backdrop-filter: blur(4px);
  padding: 4px 14px; border-radius: 99px;
}
.case-body { padding: 24px 26px 28px; }
.case-body h4 { font-size: 18px; font-weight: 700; margin-bottom: 9px; }
.case-body > p { font-size: 13.5px; color: var(--text-2); margin-bottom: 15px; }
.case-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.case-tags span {
  font-size: 11.5px; color: var(--text-2);
  background: var(--bg-alt); border: 1px solid var(--border);
  padding: 3px 10px; border-radius: 99px;
}
.cases-note { text-align: center; font-size: 12.5px; color: var(--text-2); margin-top: 28px; }
@media (max-width: 900px) { .cases-grid { grid-template-columns: 1fr; } }

/* ===================== 为什么选我们 ===================== */
.why { background: var(--bg-alt); }
.why-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.why-card {
  background: #fff; border-radius: var(--radius); padding: 34px 30px;
  border: 1px solid var(--border); position: relative;
  transition: all .3s; opacity: 0; transform: translateY(24px);
}
.why-card:hover { transform: translateY(-5px); box-shadow: 0 16px 40px rgba(10,22,40,0.1); }
.why-num {
  font-size: 44px; font-weight: 800; line-height: 1;
  background: linear-gradient(135deg, rgba(37,99,235,0.2), rgba(124,58,237,0.2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  margin-bottom: 14px;
}
.why-card h3 { font-size: 18.5px; font-weight: 700; margin-bottom: 10px; }
.why-card p { font-size: 14px; color: var(--text-2); }
@media (max-width: 800px) { .why-grid { grid-template-columns: 1fr; } }

/* ===================== 服务流程 ===================== */
.process-track { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; }
.process-step { text-align: center; position: relative; padding-top: 8px; }
.step-dot {
  width: 34px; height: 34px; margin: 0 auto 14px;
  border-radius: 50%; background: var(--primary); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 800; position: relative; z-index: 2;
}
.step-line {
  position: absolute; top: 25px; left: calc(50% + 22px); right: calc(-50% + 22px);
  height: 2px; background: linear-gradient(90deg, var(--primary), rgba(37,99,235,0.15));
}
.process-step:last-child .step-line { display: none; }
.step-icon {
  width: 60px; height: 60px; margin: 0 auto 14px;
  border-radius: 16px; background: var(--bg-alt);
  border: 1px solid var(--border);
  color: var(--primary); display: flex; align-items: center; justify-content: center;
  font-size: 23px; transition: all .3s;
}
.process-step:hover .step-icon {
  background: var(--primary); color: #fff; border-color: var(--primary);
  transform: translateY(-3px);
}
.process-step h4 { font-size: 15px; font-weight: 700; margin-bottom: 5px; }
.process-step p { font-size: 12px; color: var(--text-2); }
@media (max-width: 1000px) {
  .process-track { grid-template-columns: repeat(3, 1fr); row-gap: 36px; }
  .step-line { display: none; }
}
@media (max-width: 560px) { .process-track { grid-template-columns: repeat(2, 1fr); } }

/* ===================== 运维与技术服务 ===================== */
.ops { background: var(--bg-alt); }
.ops-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 56px; }
.ops-card {
  position: relative; background: #fff; border-radius: 18px; padding: 30px 26px;
  border: 1px solid var(--border); transition: all .35s;
  opacity: 0; transform: translateY(24px);
}
.ops-card.visible { opacity: 1; transform: translateY(0); }
.ops-card:hover { transform: translateY(-6px); box-shadow: 0 20px 48px rgba(10,22,40,0.12); }
.ops-featured { border: 2px solid #2dd4bf; box-shadow: 0 12px 36px rgba(45,212,191,0.15); }
.ops-tag {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: linear-gradient(135deg, #2dd4bf, #0ea5e9); color: #fff;
  font-size: 12px; font-weight: 700; padding: 4px 16px; border-radius: 99px;
}
.ops-card-head { text-align: center; margin-bottom: 22px; }
.ops-card-head i {
  width: 60px; height: 60px; border-radius: 16px; font-size: 26px;
  display: inline-flex; align-items: center; justify-content: center;
  background: color-mix(in srgb, var(--ops-c) 12%, #fff); color: var(--ops-c);
  margin-bottom: 14px;
}
.ops-card-head h4 { font-size: 19px; font-weight: 800; margin-bottom: 4px; }
.ops-card-head p { font-size: 13px; color: var(--text-2); }
.ops-list { list-style: none; padding: 0; margin: 0 0 22px; min-height: 198px; }
.ops-list li {
  font-size: 13.5px; color: var(--text-1); padding: 7px 0;
  display: flex; align-items: center; gap: 9px;
  border-bottom: 1px dashed var(--border);
}
.ops-list li:last-child { border-bottom: none; }
.ops-list li i { color: var(--ops-c, #2dd4bf); font-size: 12px; }
.ops-featured .ops-list li i { color: #2dd4bf; }
.ops-sla {
  background: var(--bg-alt); border-radius: 12px; padding: 12px 16px;
  display: flex; justify-content: space-between; align-items: center;
}
.ops-sla span { font-size: 12.5px; color: var(--text-2); }
.ops-sla strong { font-size: 14px; color: var(--text-1); font-weight: 700; }

.ops-modes { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.ops-mode {
  background: #fff; border-radius: 14px; padding: 24px 20px; text-align: center;
  border: 1px solid var(--border); transition: all .3s;
}
.ops-mode:hover { border-color: #2dd4bf; transform: translateY(-3px); }
.ops-mode i { font-size: 26px; color: #2dd4bf; margin-bottom: 12px; }
.ops-mode h5 { font-size: 15px; font-weight: 700; margin-bottom: 7px; }
.ops-mode p { font-size: 12.5px; color: var(--text-2); line-height: 1.65; }
@media (max-width: 1000px) { .ops-grid { grid-template-columns: 1fr; } .ops-modes { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .ops-modes { grid-template-columns: 1fr; } }

/* ===================== 关于我们 ===================== */
.about-grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 64px; align-items: center; }
.about-intro { font-size: 15.5px; color: var(--text-2); margin-bottom: 18px; }
.about-values { display: flex; flex-direction: column; gap: 18px; margin-top: 30px; }
.value-item { display: flex; align-items: center; gap: 16px; }
.value-icon {
  width: 48px; height: 48px; border-radius: 12px; flex-shrink: 0;
  background: color-mix(in srgb, var(--c) 12%, white);
  color: var(--c);
  display: flex; align-items: center; justify-content: center; font-size: 19px;
}
.value-item h4 { font-size: 15.5px; font-weight: 700; margin-bottom: 2px; }
.value-item p { font-size: 13px; color: var(--text-2); }

.about-visual {
  position: relative; min-height: 420px;
  border-radius: 22px;
  background: linear-gradient(150deg, #0d1f3c 0%, #14294d 60%, #1a1f4d 100%);
  overflow: hidden;
}
.about-circle {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 190px; height: 190px;
}
.circle-core {
  position: absolute; inset: 30px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--purple));
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  color: #fff; box-shadow: 0 0 60px rgba(37,99,235,0.5);
}
.circle-core span { font-size: 38px; font-weight: 800; line-height: 1; }
.circle-core em { font-style: normal; font-size: 12px; opacity: 0.85; margin-top: 4px; }
.circle-ring {
  position: absolute; border: 1px dashed rgba(56,189,248,0.3); border-radius: 50%;
  animation: spin 18s linear infinite;
}
.ring-1 { inset: 0; }
.ring-2 { inset: -32px; animation-duration: 26s; animation-direction: reverse; }
@keyframes spin { to { transform: rotate(360deg); } }
.about-card-float {
  position: absolute; display: flex; align-items: center; gap: 12px;
  background: rgba(255,255,255,0.07); border: 1px solid rgba(255,255,255,0.14);
  backdrop-filter: blur(8px); border-radius: 12px; padding: 12px 16px;
  animation: float 5s ease-in-out infinite;
}
.about-card-float i { font-size: 20px; color: var(--accent); }
.about-card-float strong { display: block; color: #fff; font-size: 13.5px; }
.about-card-float span { font-size: 11.5px; color: rgba(255,255,255,0.55); }
.card-1 { top: 36px; left: 32px; animation-delay: 0s; }
.card-2 { top: 42%; right: 28px; animation-delay: 1.4s; }
.card-3 { bottom: 40px; left: 44px; animation-delay: 2.8s; }
.card-3 i { color: #a78bfa; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
@media (max-width: 900px) { .about-grid { grid-template-columns: 1fr; } .about-visual { min-height: 360px; } }

/* ===================== 联系我们 ===================== */
.contact {
  background: linear-gradient(135deg, #0d1f3c 0%, #0a1628 60%, #131b3a 100%);
  position: relative; overflow: hidden;
}
.light-badge { color: var(--accent); background: rgba(56,189,248,0.12); }
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 56px; }
.contact-info { display: flex; flex-direction: column; gap: 26px; }
.contact-info-item { display: flex; gap: 18px; align-items: flex-start; }
.ci-icon {
  width: 48px; height: 48px; border-radius: 12px; flex-shrink: 0;
  background: rgba(56,189,248,0.1); border: 1px solid rgba(56,189,248,0.25);
  color: var(--accent); display: flex; align-items: center; justify-content: center; font-size: 18px;
}
.ci-content h4 { color: #fff; font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.ci-content p { color: rgba(255,255,255,0.65); font-size: 14px; }
.ci-content a { color: rgba(255,255,255,0.85); transition: color .2s; }
.ci-content a:hover { color: var(--accent); }
.contact-quick-btns { display: flex; gap: 14px; margin-top: 8px; flex-wrap: wrap; }
.quick-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px; border-radius: 10px;
  font-size: 14px; font-weight: 600; transition: all .25s;
}
.phone-btn { background: var(--primary); color: #fff; }
.phone-btn:hover { background: var(--primary-dark); }
.mail-btn { border: 1.5px solid rgba(255,255,255,0.3); color: #fff; }
.mail-btn:hover { border-color: var(--accent); color: var(--accent); }
.contact-form-wrap {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 18px; padding: 36px;
  backdrop-filter: blur(10px);
}
.contact-form h3 { color: #fff; font-size: 22px; font-weight: 700; margin-bottom: 6px; }
.form-desc { color: rgba(255,255,255,0.55); font-size: 13.5px; margin-bottom: 26px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; color: rgba(255,255,255,0.8); font-size: 13px; font-weight: 500; margin-bottom: 7px; }
.form-group label span { color: #f87171; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 12px 14px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 9px; color: #fff; font-size: 14px;
  font-family: inherit; transition: border-color .2s;
}
.form-group select option { color: var(--text); }
.form-group input::placeholder, .form-group textarea::placeholder { color: rgba(255,255,255,0.35); }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--accent); }
.form-submit {
  width: 100%; padding: 14px;
  background: linear-gradient(90deg, var(--primary), #4f46e5);
  color: #fff; border: none; border-radius: 10px;
  font-size: 15px; font-weight: 600; cursor: pointer;
  transition: all .25s; font-family: inherit;
}
.form-submit:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(37,99,235,0.4); }
.form-note { color: #34d399; font-size: 13px; margin-top: 14px; text-align: center; }
@media (max-width: 900px) { .contact-grid { grid-template-columns: 1fr; } }
@media (max-width: 560px) { .form-row { grid-template-columns: 1fr; } }

/* ===================== 页脚 ===================== */
.footer { background: #070f1e; color: rgba(255,255,255,0.6); }
.footer-top { padding: 64px 0 48px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 0.8fr 1fr 1.2fr; gap: 32px; }
.footer-logo { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.footer-logo .logo-main { color: #fff; }
.footer-desc { font-size: 13.5px; line-height: 1.7; }
.footer-col h4 { color: #fff; font-size: 15px; font-weight: 700; margin-bottom: 18px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { color: rgba(255,255,255,0.6); font-size: 13.5px; transition: color .2s; }
.footer-col ul li a:hover { color: var(--accent); }
.footer-contacts li { font-size: 13.5px; display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.footer-contacts i { color: var(--accent); width: 16px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 22px 0; font-size: 13px; }
.footer-bottom .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
@media (max-width: 1100px) { .footer-grid { grid-template-columns: 1fr 1fr 1fr; gap: 36px; } }
@media (max-width: 700px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }

/* ===================== 浮动按钮 ===================== */
.back-to-top, .float-call {
  position: fixed; right: 32px; z-index: 90;
  width: 46px; height: 46px; border-radius: 12px;
  border: none; cursor: pointer; font-size: 15px;
  display: flex; align-items: center; justify-content: center;
  transition: all .3s;
}
.back-to-top {
  bottom: 32px; background: var(--primary); color: #fff;
  opacity: 0; visibility: hidden;
  box-shadow: 0 8px 24px rgba(37,99,235,0.4);
}
.back-to-top.show { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--primary-dark); transform: translateY(-3px); }
.float-call {
  bottom: 90px; background: #059669; color: #fff;
  box-shadow: 0 8px 24px rgba(5,150,105,0.4);
  animation: pulse 2.4s infinite;
}
.float-call:hover { transform: translateY(-3px); }
@keyframes pulse {
  0%, 100% { box-shadow: 0 8px 24px rgba(5,150,105,0.4); }
  50% { box-shadow: 0 8px 24px rgba(5,150,105,0.4), 0 0 0 10px rgba(5,150,105,0.12); }
}
@media (max-width: 768px) { .back-to-top, .float-call { right: 20px; } .back-to-top { bottom: 20px; } .float-call { bottom: 76px; } }