/* ============================================
   铭赞网络 GEO优化 - 样式
   配色:深蓝 + 科技蓝 + 暖橙
   字体:系统字体栈,避免侵权
   ============================================ */

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB",
               "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans CJK SC",
               system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #1a2235;
  background: #ffffff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; transition: color .2s ease; }
a:hover { color: #1a73e8; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

:root {
  --c-bg: #ffffff;
  --c-bg-alt: #f5f7fb;
  --c-dark: #0a2540;
  --c-dark-2: #112d4e;
  --c-text: #1a2235;
  --c-text-2: #4a5568;
  --c-muted: #7a8599;
  --c-line: #e6eaf2;
  --c-primary: #1a73e8;
  --c-primary-2: #3a8cff;
  --c-accent: #ff6b35;
  --c-accent-2: #ff9a3c;
  --c-success: #10b981;
  --shadow-sm: 0 2px 8px rgba(10,37,64,.06);
  --shadow-md: 0 8px 24px rgba(10,37,64,.08);
  --shadow-lg: 0 20px 50px rgba(10,37,64,.12);
  --radius: 14px;
  --radius-sm: 8px;
  --max: 1240px;
}

.container { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* ============ 顶部公告条 ============ */
.topbar {
  background: linear-gradient(90deg, #0a2540 0%, #112d4e 100%);
  color: rgba(255,255,255,.85);
  font-size: 13px;
  height: 38px;
  display: flex;
  align-items: center;
  position: relative;
  z-index: 50;
}
.topbar-inner { display: flex; justify-content: space-between; align-items: center; width: 100%; }
.topbar-left span, .topbar-right a { display: inline-flex; align-items: center; gap: 6px; }
.topbar .dot { margin: 0 10px; opacity: .45; }
.topbar a:hover { color: #ff9a3c; }

/* ============ 导航 + Banner 一体化 ============ */
.hero {
  position: relative;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(26,115,232,.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 0%, rgba(255,107,53,.10) 0%, transparent 50%),
    linear-gradient(180deg, #f5f7fb 0%, #ffffff 70%);
  overflow: hidden;
  padding-bottom: 0;
}
.hero-bg {
  position: absolute; inset: 0;
  pointer-events: none;
  z-index: 0;
}
.bg-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(10,37,64,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10,37,64,.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 70%);
}
.bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: .5;
  animation: float 12s ease-in-out infinite;
}
.bg-orb-1 { width: 360px; height: 360px; background: #1a73e8; top: -100px; left: -120px; }
.bg-orb-2 { width: 280px; height: 280px; background: #ff6b35; top: 50px; right: -80px; animation-delay: -4s; }
.bg-orb-3 { width: 200px; height: 200px; background: #10b981; bottom: 0; left: 40%; animation-delay: -8s; opacity: .25; }
@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(20px, -20px) scale(1.05); }
}

.navbar {
  position: relative;
  z-index: 10;
  height: 80px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid rgba(10,37,64,.05);
  transition: all .3s ease;
}
.navbar.scrolled {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 68px;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  box-shadow: var(--shadow-sm);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%;
}
.logo {
  display: inline-flex; align-items: center;
  font-weight: 800;
  color: var(--c-dark);
  letter-spacing: .5px;
}
.logo-mark { font-size: 26px; position: relative; }
.r-mark {
  font-size: 12px;
  color: var(--c-accent);
  position: relative;
  top: -14px;
  margin-left: 2px;
  font-weight: 700;
}
.logo-divider { color: #c0c8d6; margin: 0 12px; font-weight: 400; }
.logo-slogan { font-size: 18px; color: var(--c-primary); font-weight: 700; }
.navbar.scrolled .logo-slogan { color: var(--c-primary); }

.nav-list {
  display: flex; gap: 6px;
  align-items: center;
}
.nav-list a {
  display: inline-block;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--c-text-2);
  font-weight: 500;
  border-radius: 8px;
  position: relative;
  transition: all .25s ease;
}
.nav-list a:hover, .nav-list a.active {
  color: var(--c-primary);
  background: rgba(26,115,232,.07);
}
.nav-list a.active::after {
  content: "";
  position: absolute;
  bottom: -4px; left: 50%;
  transform: translateX(-50%);
  width: 18px; height: 3px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
  border-radius: 2px;
}
.nav-cta {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 20px;
  background: linear-gradient(135deg, var(--c-primary), #0050b3);
  color: #fff !important;
  border-radius: 100px;
  font-weight: 600;
  font-size: 14px;
  box-shadow: 0 6px 16px rgba(26,115,232,.30);
  transition: all .25s ease;
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(26,115,232,.40); }

.nav-toggle { display: none; }

/* ============ Hero 内容 ============ */
.hero-content {
  position: relative; z-index: 1;
  display: grid;
  grid-template-columns: 1.2fr .9fr;
  gap: 60px;
  align-items: center;
  padding: 60px 24px 80px;
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px;
  background: rgba(26,115,232,.08);
  border: 1px solid rgba(26,115,232,.18);
  color: var(--c-primary);
  font-size: 13px; font-weight: 600;
  border-radius: 100px;
  margin-bottom: 22px;
}
.eyebrow-dot {
  width: 8px; height: 8px; background: var(--c-primary);
  border-radius: 50%; position: relative;
  box-shadow: 0 0 0 0 rgba(26,115,232,.6);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(26,115,232,.6); }
  70% { box-shadow: 0 0 0 10px rgba(26,115,232,0); }
  100% { box-shadow: 0 0 0 0 rgba(26,115,232,0); }
}
.hero-text h1 {
  font-size: clamp(34px, 4.6vw, 56px);
  line-height: 1.18;
  font-weight: 800;
  color: var(--c-dark);
  letter-spacing: -1px;
  margin-bottom: 22px;
}
.gradient-text {
  background: linear-gradient(120deg, #1a73e8 0%, #00b4d8 50%, #ff6b35 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  background-size: 200% 200%;
  animation: grad-shift 6s ease-in-out infinite;
}
@keyframes grad-shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}
.hl {
  position: relative;
  white-space: nowrap;
  z-index: 1;
}
.hl::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 4px;
  height: 14px;
  background: linear-gradient(90deg, rgba(255,107,53,.25), rgba(255,154,60,.25));
  z-index: -1;
  border-radius: 4px;
}
.hero-sub {
  font-size: 16.5px;
  color: var(--c-text-2);
  margin-bottom: 32px;
  max-width: 640px;
  line-height: 1.85;
}
.hero-sub strong { color: var(--c-dark); font-weight: 700; }

.hero-actions { display: flex; gap: 14px; margin-bottom: 40px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 28px;
  font-size: 15px; font-weight: 600;
  border-radius: 100px;
  transition: all .25s ease;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, #ff6b35, #ff9a3c);
  color: #fff !important;
  box-shadow: 0 8px 20px rgba(255,107,53,.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(255,107,53,.45); }
.btn-ghost {
  background: #fff;
  color: var(--c-dark) !important;
  border: 1.5px solid var(--c-line);
}
.btn-ghost:hover { border-color: var(--c-primary); color: var(--c-primary) !important; }
.btn-ghost-light {
  background: transparent;
  color: #fff !important;
  border: 1.5px solid rgba(255,255,255,.4);
}
.btn-ghost-light:hover { background: rgba(255,255,255,.1); border-color: #fff; }

.hero-trust {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  max-width: 600px;
  padding-top: 24px;
  border-top: 1px solid rgba(10,37,64,.08);
}
.hero-trust li { display: flex; flex-direction: column; }
.hero-trust strong {
  font-size: 28px; font-weight: 800;
  color: var(--c-dark);
  line-height: 1.1;
}
.hero-trust strong small { font-size: 14px; color: var(--c-primary); font-weight: 700; margin-left: 2px; }
.hero-trust span { font-size: 13px; color: var(--c-muted); margin-top: 2px; }

/* ============ Hero 视觉 轨道 ============ */
.hero-visual { position: relative; height: 460px; }
.orbit { position: relative; width: 100%; height: 100%; }
.orbit-ring {
  position: absolute;
  top: 50%; left: 50%;
  border-radius: 50%;
  border: 1.5px dashed rgba(26,115,232,.2);
  transform: translate(-50%, -50%);
  animation: rotate 30s linear infinite;
}
.orbit-ring.r1 { width: 320px; height: 320px; }
.orbit-ring.r2 { width: 420px; height: 420px; animation-duration: 45s; animation-direction: reverse; border-color: rgba(255,107,53,.18); }
.orbit-ring.r3 { width: 520px; height: 520px; animation-duration: 60s; border-color: rgba(16,185,129,.15); }
@keyframes rotate { to { transform: translate(-50%, -50%) rotate(360deg); } }
.orbit-core {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 130px; height: 130px;
  border-radius: 50%;
  background: linear-gradient(135deg, #0a2540, #1a73e8);
  color: #fff;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  box-shadow: 0 20px 50px rgba(26,115,232,.4);
  z-index: 2;
}
.core-label { font-size: 32px; font-weight: 800; letter-spacing: 1px; }
.core-sub { font-size: 11px; opacity: .85; margin-top: 4px; }
.chip {
  position: absolute;
  top: 50%; left: 50%;
  padding: 8px 16px;
  background: #fff;
  border-radius: 100px;
  font-size: 13px; font-weight: 600;
  color: var(--c-dark);
  box-shadow: var(--shadow-md);
  white-space: nowrap;
  border: 1px solid rgba(10,37,64,.06);
}
.chip.c1 { transform: translate(-50%, -50%) translate(0, -180px); }
.chip.c2 { transform: translate(-50%, -50%) translate(165px, -110px); background: linear-gradient(135deg, #10b981, #34d399); color: #fff; border: none; }
.chip.c3 { transform: translate(-50%, -50%) translate(195px, 50px); }
.chip.c4 { transform: translate(-50%, -50%) translate(110px, 180px); background: linear-gradient(135deg, #ff6b35, #ff9a3c); color: #fff; border: none; }
.chip.c5 { transform: translate(-50%, -50%) translate(-110px, 180px); }
.chip.c6 { transform: translate(-50%, -50%) translate(-195px, 50px); background: linear-gradient(135deg, #1a73e8, #3a8cff); color: #fff; border: none; }
.chip.c7 { transform: translate(-50%, -50%) translate(-165px, -110px); }
.chip.c8 { transform: translate(-50%, -50%) translate(0, 180px); background: linear-gradient(135deg, #8b5cf6, #a78bfa); color: #fff; border: none; }

/* ============ 跑马灯 ============ */
.hero-marquee {
  position: relative;
  z-index: 2;
  background: linear-gradient(90deg, #0a2540, #112d4e);
  padding: 14px 0;
  overflow: hidden;
  border-top: 1px solid rgba(255,255,255,.08);
}
.marquee-track {
  display: flex; align-items: center; gap: 40px;
  white-space: nowrap;
  animation: marquee 40s linear infinite;
  color: rgba(255,255,255,.85);
  font-size: 14px; font-weight: 500;
}
.marquee-track span { display: inline-block; }
.marquee-track i {
  display: inline-block; width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--c-accent-2);
  margin: 0 -20px;
}
@keyframes marquee {
  to { transform: translateX(-50%); }
}

/* ============ 通用 Section ============ */
.section { padding: 90px 0; position: relative; }
.section-alt { background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%); }
.section-dark {
  background: linear-gradient(135deg, #0a2540 0%, #112d4e 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.section-dark::before {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at 20% 30%, rgba(26,115,232,.20) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 70%, rgba(255,107,53,.12) 0%, transparent 50%);
  pointer-events: none;
}
.section-dark > .container { position: relative; z-index: 1; }
.section-head { text-align: center; max-width: 760px; margin: 0 auto 56px; }
.section-tag {
  display: inline-block;
  padding: 5px 14px;
  background: rgba(26,115,232,.08);
  color: var(--c-primary);
  border-radius: 100px;
  font-size: 12px; font-weight: 700;
  letter-spacing: 1.5px;
  margin-bottom: 18px;
}
.section-dark .section-tag { background: rgba(255,107,53,.15); color: #ff9a3c; }
.section-title {
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 800;
  color: var(--c-dark);
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -.5px;
}
.section-title em {
  font-style: normal;
  background: linear-gradient(120deg, #1a73e8, #ff6b35);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}
.section-dark .section-title { color: #fff; }
.section-desc {
  font-size: 16px;
  color: var(--c-text-2);
  line-height: 1.85;
}
.section-dark .section-desc { color: rgba(255,255,255,.78); }

/* ============ 服务卡片 ============ */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: all .3s ease;
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s ease;
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.service-card:hover::before { transform: scaleX(1); }
.service-card.featured {
  background: linear-gradient(135deg, #f0f6ff 0%, #fff5f0 100%);
  border-color: rgba(26,115,232,.18);
}
.service-card.featured::before { transform: scaleX(1); }
.sc-icon {
  width: 56px; height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--c1, #1a73e8), var(--c2, #0a2540));
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
  box-shadow: 0 8px 18px rgba(0,0,0,.10);
}
.service-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--c-dark);
  margin-bottom: 12px;
}
.service-card p {
  color: var(--c-text-2);
  font-size: 14.5px;
  line-height: 1.75;
  margin-bottom: 16px;
}
.sc-list { padding-left: 0; }
.sc-list li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  color: var(--c-text-2);
  margin-bottom: 8px;
  line-height: 1.6;
}
.sc-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 8px;
  width: 14px; height: 8px;
  border-left: 2px solid var(--c-primary);
  border-bottom: 2px solid var(--c-primary);
  transform: rotate(-45deg);
}
.sc-flag {
  position: absolute;
  top: 16px; right: 16px;
  padding: 4px 10px;
  background: linear-gradient(135deg, #ff6b35, #ff9a3c);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  border-radius: 100px;
  letter-spacing: .5px;
}

/* ============ 平台覆盖 ============ */
.platform-tabs {
  display: flex; justify-content: center; gap: 8px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.ptab {
  padding: 10px 24px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: 100px;
  font-size: 15px;
  font-weight: 600;
  color: var(--c-text-2);
  transition: all .25s ease;
}
.ptab:hover { border-color: var(--c-primary); color: var(--c-primary); }
.ptab.active {
  background: linear-gradient(135deg, var(--c-primary), #0050b3);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 6px 16px rgba(26,115,232,.30);
}
.ptab-panels { position: relative; }
.ptab-panel { display: none; animation: fadein .35s ease; }
.ptab-panel.active { display: block; }
@keyframes fadein { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.plat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.plat-card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 24px 22px;
  transition: all .25s ease;
}
.plat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(26,115,232,.2);
}
.plat-logo {
  width: 52px; height: 52px;
  border-radius: 12px;
  background: linear-gradient(135deg, #0a2540, #1a73e8);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: 1px;
}
.plat-card h4 {
  font-size: 17px; font-weight: 700;
  color: var(--c-dark);
  margin-bottom: 8px;
}
.plat-card p {
  font-size: 13.5px;
  color: var(--c-text-2);
  line-height: 1.7;
}

/* ============ 行业场景 ============ */
.scene-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.scene-card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 26px 22px;
  transition: all .25s ease;
  position: relative;
  overflow: hidden;
}
.scene-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(26,115,232,.2);
}
.scene-num {
  font-size: 32px;
  font-weight: 800;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--c-primary);
  line-height: 1;
  margin-bottom: 12px;
  font-family: "Courier New", monospace;
  letter-spacing: -1px;
}
.scene-card h3 {
  font-size: 18px; font-weight: 700;
  color: var(--c-dark);
  margin-bottom: 8px;
}
.scene-card p {
  font-size: 13.5px;
  color: var(--c-text-2);
  line-height: 1.7;
  margin-bottom: 14px;
}
.scene-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.scene-tags span {
  font-size: 12px;
  padding: 3px 10px;
  background: rgba(26,115,232,.08);
  color: var(--c-primary);
  border-radius: 100px;
  font-weight: 500;
}

/* ============ 15年优势 ============ */
.adv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 80px;
}
.adv-card {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.10);
  border-radius: var(--radius);
  padding: 30px 26px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all .25s ease;
}
.adv-card:hover {
  background: rgba(255,255,255,.10);
  transform: translateY(-4px);
  border-color: rgba(255,107,53,.3);
}
.adv-ico {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, #ff6b35, #ff9a3c);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.adv-card h3 {
  font-size: 19px; font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}
.adv-card p {
  font-size: 14px;
  color: rgba(255,255,255,.78);
  line-height: 1.75;
}

.flow-title {
  text-align: center;
  font-size: 26px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 36px;
}
.flow-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: wrap;
}
.flow-step {
  flex: 1;
  min-width: 130px;
  background: #fff;
  border-radius: var(--radius);
  padding: 22px 18px;
  text-align: center;
  position: relative;
}
.fs-num {
  display: inline-block;
  padding: 4px 12px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  color: #fff;
  font-size: 12px;
  font-weight: 800;
  border-radius: 100px;
  margin-bottom: 10px;
  letter-spacing: 1px;
}
.flow-step h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--c-dark);
  margin-bottom: 6px;
}
.flow-step p {
  font-size: 12.5px;
  color: var(--c-text-2);
  line-height: 1.6;
}
.flow-arrow {
  width: 24px; height: 2px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.4), transparent);
  position: relative;
  flex-shrink: 0;
}
.flow-arrow::after {
  content: "";
  position: absolute; right: 0; top: 50%;
  width: 8px; height: 8px;
  border-top: 2px solid rgba(255,255,255,.5);
  border-right: 2px solid rgba(255,255,255,.5);
  transform: translateY(-50%) rotate(45deg);
}

/* ============ 案例 ============ */
.case-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.case-card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 32px 28px;
  position: relative;
  overflow: hidden;
  transition: all .3s ease;
}
.case-card::before {
  content: "";
  position: absolute;
  top: 0; right: 0;
  width: 120px; height: 120px;
  background: radial-gradient(circle, rgba(26,115,232,.08) 0%, transparent 70%);
  border-radius: 50%;
  transform: translate(40%, -40%);
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.case-meta {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 14px;
  position: relative;
}
.case-tag {
  display: inline-block;
  padding: 4px 12px;
  background: linear-gradient(135deg, #f0f6ff, #fff5f0);
  color: var(--c-primary);
  font-size: 12px;
  font-weight: 700;
  border-radius: 100px;
  border: 1px solid rgba(26,115,232,.15);
}
.case-period { font-size: 12px; color: var(--c-muted); }
.case-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--c-dark);
  margin-bottom: 12px;
  position: relative;
}
.case-card p {
  font-size: 14.5px;
  color: var(--c-text-2);
  line-height: 1.75;
  margin-bottom: 22px;
  position: relative;
}
.case-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  padding-top: 18px;
  border-top: 1px solid var(--c-line);
  position: relative;
}
.case-metrics li { text-align: center; }
.case-metrics strong {
  display: block;
  font-size: 22px;
  font-weight: 800;
  background: linear-gradient(135deg, #1a73e8, #ff6b35);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
  line-height: 1.1;
  margin-bottom: 4px;
}
.case-metrics span { font-size: 12px; color: var(--c-muted); }

/* ============ 行业洞察 ============ */
.insight-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}
.insight-card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 28px 26px;
  transition: all .25s ease;
  display: flex; flex-direction: column;
}
.insight-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(26,115,232,.2);
}
.ic-cat {
  display: inline-block;
  padding: 3px 10px;
  background: rgba(255,107,53,.10);
  color: var(--c-accent);
  font-size: 12px;
  font-weight: 700;
  border-radius: 100px;
  margin-bottom: 14px;
  align-self: flex-start;
}
.insight-card h3 {
  font-size: 18px; font-weight: 700;
  color: var(--c-dark);
  margin-bottom: 10px;
  line-height: 1.5;
}
.insight-card p {
  font-size: 14px;
  color: var(--c-text-2);
  line-height: 1.7;
  margin-bottom: 18px;
  flex: 1;
}
.ic-more {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-primary);
  transition: gap .25s ease;
}

/* ============ FAQ ============ */
.faq-list {
  max-width: 920px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all .25s ease;
}
.faq-item:hover { border-color: rgba(26,115,232,.2); }
.faq-item.open { box-shadow: var(--shadow-md); border-color: rgba(26,115,232,.25); }
.faq-q {
  width: 100%;
  text-align: left;
  padding: 22px 26px;
  font-size: 16.5px;
  font-weight: 600;
  color: var(--c-dark);
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px;
  background: transparent;
  border: none;
  cursor: pointer;
  line-height: 1.5;
}
.faq-q .q-num {
  display: inline-flex;
  width: 30px; height: 30px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  color: #fff;
  font-size: 13px; font-weight: 800;
  align-items: center; justify-content: center;
  flex-shrink: 0;
  margin-right: 4px;
}
.faq-q .q-toggle {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: rgba(26,115,232,.08);
  color: var(--c-primary);
  display: inline-flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  font-size: 18px;
  transition: all .25s ease;
  position: relative;
}
.faq-q .q-toggle::before { content: "+"; line-height: 1; }
.faq-item.open .q-toggle { background: var(--c-primary); color: #fff; transform: rotate(45deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .4s ease, padding .3s ease;
  padding: 0 26px;
  color: var(--c-text-2);
  font-size: 15px;
  line-height: 1.85;
}
.faq-item.open .faq-a {
  max-height: 600px;
  padding: 0 26px 22px 70px;
}
.faq-cta {
  text-align: center;
  margin-top: 40px;
}
.faq-cta p { color: var(--c-text-2); margin-bottom: 14px; }

/* ============ 联系我们 ============ */
.section-contact { background: linear-gradient(135deg, #0a2540 0%, #112d4e 100%); }
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr .9fr 1.3fr;
  gap: 24px;
}
.contact-card {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.10);
  border-radius: var(--radius);
  padding: 32px 28px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.contact-card h3 {
  font-size: 20px; font-weight: 700;
  color: #fff;
  margin-bottom: 22px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255,255,255,.10);
}
.ci-list { display: flex; flex-direction: column; gap: 18px; }
.ci-list li { display: flex; gap: 14px; align-items: flex-start; }
.ci-ico {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, #1a73e8, #3a8cff);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.ci-label { font-size: 12px; color: rgba(255,255,255,.6); margin-bottom: 2px; }
.ci-value { font-size: 15px; color: #fff; font-weight: 500; word-break: break-all; }
.ci-value:hover { color: #ff9a3c; }

.qr-card { text-align: center; }
.qr-wrap {
  display: inline-flex; flex-direction: column; align-items: center;
  padding: 14px;
  background: #fff;
  border-radius: var(--radius);
  margin-bottom: 16px;
}
.qr-wrap img { width: 180px; height: 180px; border-radius: 8px; }
.qr-tip { font-size: 13px; color: var(--c-text-2); margin-top: 10px; }
.qr-actions { display: flex; gap: 10px; justify-content: center; margin-top: 8px; }
.qr-actions .btn { padding: 10px 18px; font-size: 13px; }

.form-card .cform { display: flex; flex-direction: column; gap: 12px; }
.form-card .row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.form-card input, .form-card select, .form-card textarea {
  width: 100%;
  padding: 12px 14px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 10px;
  color: #fff;
  font-size: 14px;
  font-family: inherit;
  transition: all .25s ease;
}
.form-card input::placeholder, .form-card textarea::placeholder { color: rgba(255,255,255,.45); }
.form-card input:focus, .form-card select:focus, .form-card textarea:focus {
  outline: none;
  border-color: var(--c-accent);
  background: rgba(255,255,255,.12);
}
.form-card select {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'><path d='M7 10l5 5 5-5z'/></svg>");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}
.form-card select option { background: #0a2540; color: #fff; }
.form-card textarea { resize: vertical; min-height: 80px; }
.form-card .btn { width: 100%; margin-top: 6px; }
.form-tip { font-size: 12px; color: rgba(255,255,255,.55); text-align: center; margin-top: 6px; }
.form-tip.success { color: #34d399; }

/* ============ 其他业务 ============ */
.other-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.other-card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: all .25s ease;
  display: block;
  position: relative;
  overflow: hidden;
}
.other-card::after {
  content: "↗";
  position: absolute;
  top: 18px; right: 22px;
  font-size: 18px;
  color: var(--c-primary);
  opacity: 0;
  transition: all .25s ease;
}
.other-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: rgba(26,115,232,.2); }
.other-card:hover::after { opacity: 1; right: 18px; }
.oc-num {
  font-size: 14px;
  font-weight: 800;
  color: var(--c-primary);
  letter-spacing: 1px;
  margin-bottom: 10px;
}
.other-card h3 {
  font-size: 19px; font-weight: 700;
  color: var(--c-dark);
  margin-bottom: 10px;
}
.other-card p {
  font-size: 14px;
  color: var(--c-text-2);
  line-height: 1.7;
  margin-bottom: 14px;
}
.oc-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-primary);
}

/* ============ Footer ============ */
.footer {
  background: #0a1a2e;
  color: rgba(255,255,255,.75);
  padding-top: 64px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
}
.foot-brand .logo { color: #fff; margin-bottom: 18px; }
.foot-brand .logo-mark { font-size: 24px; color: #fff; }
.foot-brand .logo-slogan { color: #ff9a3c; }
.foot-desc {
  font-size: 13.5px;
  line-height: 1.85;
  margin-bottom: 20px;
  color: rgba(255,255,255,.65);
}
.foot-social { display: flex; gap: 10px; }
.foot-social a {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 64px; height: 32px;
  padding: 0 14px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.10);
  border-radius: 100px;
  font-size: 13px;
  color: rgba(255,255,255,.85);
  transition: all .25s ease;
}
.foot-social a:hover { background: var(--c-accent); color: #fff; border-color: var(--c-accent); }
.foot-col h4 {
  font-size: 15px; font-weight: 700;
  color: #fff;
  margin-bottom: 18px;
}
.foot-col ul li { margin-bottom: 10px; }
.foot-col ul li a {
  font-size: 13.5px;
  color: rgba(255,255,255,.65);
  transition: all .2s ease;
}
.foot-col ul li a:hover { color: #ff9a3c; padding-left: 4px; }

.foot-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 22px 0;
  background: rgba(0,0,0,.18);
}
.foot-bottom-inner {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px;
  font-size: 13px;
  color: rgba(255,255,255,.6);
}
.foot-bottom-inner a { color: rgba(255,255,255,.85); }
.foot-bottom-inner a:hover { color: #ff9a3c; }

/* ============ 城市友情链接(地区站底部) ============ */
.foot-links {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 26px 0 22px;
  background: rgba(255,255,255,.02);
}
.foot-links h4 {
  font-size: 14px;
  color: rgba(255,255,255,.85);
  margin-bottom: 14px;
  letter-spacing: 0.5px;
  position: relative;
  padding-left: 12px;
}
.foot-links h4::before {
  content: '';
  position: absolute; left: 0; top: 4px;
  width: 4px; height: 14px;
  background: linear-gradient(180deg, #1a73e8, #ff6b35);
  border-radius: 2px;
}
.city-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  font-size: 13px;
}
.city-links a {
  display: inline-block;
  padding: 5px 12px;
  background: rgba(255,255,255,.06);
  color: rgba(255,255,255,.7);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 100px;
  transition: all .2s ease;
  white-space: nowrap;
}
.city-links a:hover {
  background: linear-gradient(135deg, #1a73e8, #ff6b35);
  color: #fff;
  border-color: transparent;
  transform: translateY(-1px);
}

/* ============ 右侧悬浮 ============ */
.floats {
  position: fixed;
  right: 18px;
  bottom: 30px;
  z-index: 60;
  display: flex; flex-direction: column; gap: 10px;
}
.float-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 16px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: 100px;
  font-size: 13px; font-weight: 600;
  color: var(--c-dark);
  box-shadow: var(--shadow-md);
  transition: all .25s ease;
}
.float-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); color: var(--c-primary); }
.float-btn.back-top {
  background: linear-gradient(135deg, var(--c-primary), #0050b3);
  color: #fff;
  border-color: transparent;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
}
.float-btn.back-top.show {
  opacity: 1;
  pointer-events: auto;
  transform: none;
}

/* ============ AOS 简易实现 ============ */
[data-aos] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .8s ease, transform .8s ease;
}
[data-aos="fade-left"] { transform: translateX(30px); }
[data-aos].aos-animate { opacity: 1; transform: none; }

/* ============ 响应式 ============ */
@media (max-width: 1100px) {
  .service-grid, .plat-grid, .other-grid { grid-template-columns: repeat(2, 1fr); }
  .scene-grid { grid-template-columns: repeat(3, 1fr); }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr 1fr; }
  .qr-card { grid-column: span 2; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 860px) {
  .topbar { display: none; }
  .navbar { height: 64px; }
  .nav-list {
    position: fixed; top: 64px; right: -100%;
    width: 78%; max-width: 320px; height: calc(100vh - 64px);
    flex-direction: column;
    background: #fff;
    padding: 24px;
    box-shadow: var(--shadow-lg);
    transition: right .3s ease;
    align-items: stretch;
    gap: 0;
    overflow-y: auto;
  }
  .nav-list.open { right: 0; }
  .nav-list a { padding: 14px 16px; font-size: 16px; border-bottom: 1px solid var(--c-line); border-radius: 0; }
  .nav-list a.active::after { display: none; }
  .nav-cta { display: none; }
  .nav-toggle {
    display: flex; flex-direction: column; gap: 4px;
    padding: 8px;
  }
  .nav-toggle span {
    display: block; width: 22px; height: 2px;
    background: var(--c-dark);
    border-radius: 2px;
    transition: all .3s ease;
  }
  .nav-toggle.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
  .nav-toggle.open span:nth-child(2) { opacity: 0; }
  .nav-toggle.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

  .hero-content { grid-template-columns: 1fr; gap: 40px; padding: 40px 24px 60px; }
  .hero-visual { height: 360px; max-width: 380px; margin: 0 auto; }
  .orbit-ring.r1 { width: 240px; height: 240px; }
  .orbit-ring.r2 { width: 320px; height: 320px; }
  .orbit-ring.r3 { width: 400px; height: 400px; }
  .orbit-core { width: 100px; height: 100px; }
  .core-label { font-size: 24px; }
  .chip { font-size: 11px; padding: 5px 10px; }
  .chip.c1 { transform: translate(-50%, -50%) translate(0, -130px); }
  .chip.c2 { transform: translate(-50%, -50%) translate(120px, -80px); }
  .chip.c3 { transform: translate(-50%, -50%) translate(140px, 40px); }
  .chip.c4 { transform: translate(-50%, -50%) translate(80px, 130px); }
  .chip.c5 { transform: translate(-50%, -50%) translate(-80px, 130px); }
  .chip.c6 { transform: translate(-50%, -50%) translate(-140px, 40px); }
  .chip.c7 { transform: translate(-50%, -50%) translate(-120px, -80px); }
  .chip.c8 { transform: translate(-50%, -50%) translate(0, 130px); }

  .service-grid, .plat-grid, .scene-grid, .other-grid, .adv-grid, .case-grid, .insight-grid, .contact-grid { grid-template-columns: 1fr; }
  .qr-card, .form-card .row { grid-column: span 1; }
  .form-card .row { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 30px; }
  .floats { right: 12px; bottom: 20px; }
  .float-btn span { display: none; }
  .float-btn { padding: 10px; min-width: 40px; justify-content: center; }
  .flow-grid { flex-direction: column; }
  .flow-arrow { width: 2px; height: 16px; }
  .flow-arrow::after { right: 50%; top: auto; bottom: 0; transform: translate(50%, 0) rotate(135deg); }
  .hero-trust { grid-template-columns: repeat(2, 1fr); }
  .foot-bottom-inner { flex-direction: column; text-align: center; }
}
@media (max-width: 480px) {
  .section { padding: 60px 0; }
  .container { padding: 0 18px; }
  .hero-text h1 { font-size: 30px; }
  .contact-card { padding: 24px 20px; }
  .service-card, .case-card, .insight-card, .other-card { padding: 24px 20px; }
  .faq-q { padding: 18px 20px; font-size: 15px; }
  .faq-item.open .faq-a { padding: 0 20px 18px 20px; }
}

/* 减少动效 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  [data-aos] { opacity: 1; transform: none; }
}