/* ============================================
   智潮时代官网 — 全局样式 v3（沉稳重设计版）
   品牌主色：#0A3D91（深蓝，专业稳重）
   辅助色：#1E88E5（亮蓝）/ #FFB300（琥珀金，点睛）
   设计原则：克制、沉稳、有层次；减少动画噪音
   ============================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif; font-size: 16px; line-height: 1.7; color: #3D4451; background: #fff; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img { max-width: 100%; height: auto; display: block; }
a { color: #0A3D91; text-decoration: none; transition: color .2s ease; }
ul, ol { list-style: none; }
::selection { background: rgba(10,61,145,.12); color: #0A3D91; }
:root {
  --color-primary: #0A3D91;
  --color-primary-dark: #072B6A;
  --color-primary-light: #1565C0;
  --color-accent: #1E88E5;
  --color-accent-light: #42A5F5;
  --color-warm: #FFB300;
  --color-gold: #FFD54F;
  --color-gradient: linear-gradient(135deg, #0A3D91 0%, #1E88E5 100%);
  --color-gradient-light: linear-gradient(135deg, rgba(10,61,145,.08), rgba(30,136,229,.08));
  --color-success: #10B981; --color-warning: #F59E0B; --color-danger: #EF4444;
  --color-text-title: #16233B; --color-text-body: #333C4C; --color-text-muted: #55606E;
  --color-border: #D8E0EB; --color-border-light: #E4EAF2; --color-bg: #fff;
  --color-bg-gray: #F5F8FF; --color-bg-soft: #EDF4FF;
  --shadow-sm: 0 1px 3px rgba(10,61,145,.06); --shadow-md: 0 4px 16px rgba(10,61,145,.1);
  --shadow-lg: 0 12px 32px rgba(10,61,145,.12); --shadow-xl: 0 24px 60px rgba(10,61,145,.16);
  --shadow-primary: 0 8px 24px rgba(10,61,145,.24);
  --radius-sm: 8px; --radius-md: 14px; --radius-lg: 20px; --radius-xl: 26px;
  --transition: .3s cubic-bezier(.4,0,.2,1); --container-max: 1200px; --nav-height: 72px; --topbar-height: 40px;
}
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 13px 30px; font-size: 16px; font-weight: 600; border-radius: 10px; border: none; cursor: pointer; transition: all var(--transition); text-decoration: none; gap: 8px; white-space: nowrap; position: relative; }
.btn-primary { background: var(--color-gradient); color: #fff; box-shadow: var(--shadow-primary); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 32px rgba(10,61,145,.32); color: #fff; }
.btn-secondary { background: #fff; color: var(--color-primary); border: 1.5px solid rgba(10,61,145,.3); }
.btn-secondary:hover { background: var(--color-bg-soft); border-color: var(--color-primary); transform: translateY(-2px); color: var(--color-primary); }
.btn-white { background: #fff; color: var(--color-primary); box-shadow: var(--shadow-lg); }
.btn-white:hover { transform: translateY(-2px); box-shadow: var(--shadow-xl); color: var(--color-primary-dark); }
.btn-outline-white { background: rgba(255,255,255,.1); color: #fff; border: 1.5px solid rgba(255,255,255,.55); backdrop-filter: blur(8px); }
.btn-outline-white:hover { background: #fff; color: var(--color-primary); border-color: #fff; }
.btn-lg { padding: 16px 38px; font-size: 17px; }
.btn-sm { padding: 10px 20px; font-size: 14px; }
h1, h2, h3, h4, h5, h6 { color: var(--color-text-title); font-weight: 700; line-height: 1.25; }
h1 { font-size: clamp(30px, 4.5vw, 50px); letter-spacing: -.02em; }
h2 { font-size: clamp(24px, 3vw, 34px); letter-spacing: -.01em; }
h3 { font-size: clamp(18px, 2vw, 21px); }
h4 { font-size: 17px; }
.lead { font-size: 18px; line-height: 1.8; color: var(--color-text-body); }
.text-muted { color: var(--color-text-muted); }
.text-center { text-align: center; }
.grad-text { background: var(--color-gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; color: transparent; }
.section { padding: 84px 0; }
.section-sm { padding: 48px 0; }
.section-title { text-align: center; margin-bottom: 52px; }
.section-title .eyebrow { display: inline-flex; align-items: center; gap: 8px; padding: 7px 18px; font-size: 13px; font-weight: 600; color: var(--color-primary); background: var(--color-bg-soft); border: 1px solid rgba(10,61,145,.14); border-radius: 100px; margin-bottom: 18px; letter-spacing: .04em; }
.section-title .eyebrow::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--color-primary); }
.section-title h2 { margin-bottom: 14px; }
.section-title p { max-width: 680px; margin: 0 auto; font-size: 16px; color: var(--color-text-muted); }


/* ================= 导航栏 ================= */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--nav-height);
  background: rgba(255,255,255,0.86);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(226,232,240,0.7);
  transition: all var(--transition);
}
.navbar.scrolled { top: 0; background: rgba(255,255,255,0.97); box-shadow: 0 4px 20px rgba(10,61,145,0.08); }

/* 导航栏滚动隐藏：向下滚动 → 顶栏+导航整体滑出屏幕完全隐藏；向上滚动 → 保持隐藏，只有回到页面顶部才完整显示 */
body.nav-hidden .navbar { transform: translateY(-100%); opacity: 0; pointer-events: none; }
body.nav-top .navbar { transform: translateY(0); opacity: 1; pointer-events: auto; }
.navbar { transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.35s ease; will-change: transform; }
body.nav-hidden .nav-menu { transform: translateY(-120%); opacity: 0; pointer-events: none; }
.navbar .container { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.nav-logo { display: flex; align-items: center; gap: 12px; font-weight: 700; font-size: 20px; color: var(--color-text-title); }
.nav-logo .logo-mark {
  width: 40px; height: 40px; border-radius: 10px; overflow: hidden;
  background: var(--color-gradient); display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 10px rgba(10,61,145,.28);
}
.nav-logo img { width: 100%; height: 100%; object-fit: cover; }
.nav-menu { display: flex; align-items: center; gap: 4px; }
.nav-menu a {
  display: block; padding: 9px 16px; font-size: 15px;
  color: var(--color-text-body); font-weight: 500;
  border-radius: 8px; transition: all 0.2s ease; position: relative;
}
.nav-menu a:hover, .nav-menu a.active { color: var(--color-primary); background: rgba(10,61,145,.06); }
.nav-menu a.active::after {
  content: ''; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%);
  width: 20px; height: 3px; border-radius: 3px; background: var(--color-gradient);
}
.nav-cta { display: flex; align-items: center; gap: 12px; }
.nav-phone { display: flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600; color: var(--color-text-title); }
.nav-phone .phone-icon {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--color-gradient); color: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 10px rgba(10,61,145,.28);
}
.nav-phone .phone-icon svg { width: 18px; height: 18px; stroke: currentColor; fill: none; stroke-width: 2; }
.nav-toggle {
  display: none; background: none; border: none;
  width: 40px; height: 40px; cursor: pointer;
  flex-direction: column; justify-content: center; gap: 5px;
}
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--color-text-title); border-radius: 2px; transition: all 0.3s ease; }
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 1100px) {
  .nav-menu {
    position: fixed; top: var(--nav-height); left: 0; right: 0;
    flex-direction: column; gap: 0; padding: 16px;
    background: #fff; border-bottom: 1px solid var(--color-border);
    transform: translateY(-120%); opacity: 0;
    transition: all 0.3s ease; pointer-events: none;
    box-shadow: 0 24px 48px rgba(10,61,145,.12);
  }
  .nav-menu.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-menu a { width: 100%; padding: 14px 16px; border-radius: 8px; }
  .nav-menu a.active::after { display: none; }
  .nav-phone { display: none; }
  .nav-toggle { display: flex; }
}

/* ================= HERO 区（双栏：文案 + AI 演示卡片） ================= */
.hero {
  padding: calc(var(--nav-height) + 32px) 0 64px;
  min-height: calc(72vh);
  display: flex;
  align-items: center;
  background:
    radial-gradient(ellipse 80% 60% at 15% 0%, rgba(10,61,145,0.08) 0%, transparent 60%),
    radial-gradient(ellipse 55% 50% at 95% 15%, rgba(30,136,229,0.1) 0%, transparent 60%),
    linear-gradient(180deg, #F5F8FF 0%, #FFFFFF 100%);
  position: relative; overflow: hidden;
}
.hero-bg-grid {
  content: ''; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(10,61,145,0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10,61,145,0.045) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 25%, transparent 72%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 25%, transparent 72%);
  pointer-events: none;
}
.hero .orb { position: absolute; border-radius: 50%; filter: blur(64px); pointer-events: none; opacity: .5; }
.hero .orb-1 { width: 380px; height: 380px; top: -120px; right: 6%; background: rgba(30,136,229,.14); animation: float 9s ease-in-out infinite; }
.hero .orb-2 { width: 280px; height: 280px; bottom: -100px; left: 8%; background: rgba(10,61,145,.1); animation: float 11s ease-in-out infinite reverse; }
@keyframes float { 0%, 100% { transform: translateY(0) scale(1); } 50% { transform: translateY(-24px) scale(1.04); } }
.hero .container { position: relative; z-index: 2; width: 100%; }
.hero-inner { max-width: 860px; margin: 0 auto; text-align: center; }
.hero-content { text-align: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 8px 22px; font-size: 15px; font-weight: 600;
  color: var(--color-primary); background: rgba(255,255,255,0.8);
  border: 1px solid rgba(10,61,145,.18); border-radius: 100px;
  margin-bottom: 20px; backdrop-filter: blur(8px);
  box-shadow: 0 4px 14px rgba(10,61,145,.08);
}
.hero-badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--color-success); box-shadow: 0 0 0 4px rgba(16,185,129,.15); }
.hero h1 { margin-bottom: 16px; line-height: 1.15; font-size: clamp(30px, 4.5vw, 50px); }
.hero h1 .grad-text { display: inline; white-space: nowrap; }
.hero .lead { font-size: clamp(16px, 2vw, 19px); margin-bottom: 28px; color: var(--color-text-body); max-width: 760px; line-height: 1.75; text-wrap: balance; }
.hero-cta { display: flex; flex-direction: column; align-items: center; gap: 30px; }
.hero-cta-buttons { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-.hero-cta .btn-lg { padding: 15px 34px; font-size: 17px; }
.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; max-width: 760px; margin: 0 auto; width: 100%;
  padding: 20px 28px; border-radius: var(--radius-lg);
  background: rgba(255,255,255,0.72); backdrop-filter: blur(12px);
  border: 1px solid rgba(226,232,240,0.7);
  box-shadow: 0 12px 32px rgba(10,61,145,0.06);
}
.hero-stat { text-align: center; position: relative; padding: 4px 12px; }
.hero-stat + .hero-stat::before {
  content: ''; position: absolute; left: -2px; top: 18%; bottom: 18%;
  width: 1px; background: var(--color-border);
}
.hero-stat .number {
  font-size: clamp(22px, 2.6vw, 28px); font-weight: 800; line-height: 1.1;
  background: var(--color-gradient);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero-stat .label { font-size: 13.5px; color: #4A5668; margin-top: 4px; }

/* ---- Hero 右侧：AI 演示卡片（视觉锚点） ---- */
.hero-visual { position: relative; display: flex; justify-content: center; }
.ai-demo-card {
  width: 100%; max-width: 430px;
  background: #fff; border-radius: var(--radius-xl);
  border: 1px solid rgba(226,232,240,.9);
  box-shadow: 0 24px 64px rgba(10,61,145,.14);
  overflow: hidden; position: relative; z-index: 2;
}
.ai-demo-head {
  display: flex; align-items: center; gap: 12px;
  padding: 16px 20px; background: var(--color-primary-dark);
  color: #fff;
}
.ai-avatar {
  width: 40px; height: 40px; border-radius: 12px; flex-shrink: 0;
  background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.2);
  display: flex; align-items: center; justify-content: center;
}
.ai-avatar svg { width: 22px; height: 22px; stroke: #fff; }
.ai-demo-title { flex: 1; line-height: 1.3; }
.ai-demo-title strong { display: block; font-size: 16px; font-weight: 700; }
.ai-demo-title span { font-size: 12px; color: rgba(255,255,255,.72); }
.ai-live {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; font-weight: 600; color: #FFE9B3;
  padding: 5px 12px; border-radius: 100px;
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.16);
}
.live-dot { width: 7px; height: 7px; border-radius: 50%; background: #4CD3A0; box-shadow: 0 0 0 3px rgba(76,211,160,.2); }
.ai-q, .ai-a { padding: 14px 20px; display: flex; gap: 12px; align-items: flex-start; }
.ai-q { background: #F8FAFD; border-bottom: 1px solid var(--color-border-light); }
.ai-q-label, .ai-a-label {
  flex-shrink: 0; font-size: 12px; font-weight: 700; line-height: 1.9;
  padding: 2px 10px; border-radius: 6px; margin-top: 2px;
}
.ai-q-label { background: #EAF1FB; color: var(--color-primary); }
.ai-a-label { background: var(--color-gradient); color: #fff; }
.ai-q p { font-size: 14.5px; color: var(--color-text-title); font-weight: 500; line-height: 1.65; }
.ai-a p { font-size: 14px; color: var(--color-text-body); line-height: 1.7; }
.ai-a p strong { color: var(--color-primary); font-weight: 700; }
.ai-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.ai-tag {
  font-size: 12px; font-weight: 600; color: var(--color-primary);
  background: var(--color-bg-soft); border: 1px solid rgba(10,61,145,.12);
  padding: 4px 12px; border-radius: 100px;
}
.ai-demo-foot {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 20px; border-top: 1px solid var(--color-border-light);
  font-size: 12.5px; color: var(--color-text-muted);
}
.ai-brand-mark { font-weight: 700; color: var(--color-primary); }
.hero-float-tag {
  position: absolute; display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 18px; background: #fff; color: var(--color-text-title);
  font-size: 13.5px; font-weight: 600; border-radius: 100px;
  box-shadow: 0 10px 26px rgba(10,61,145,.14);
  border: 1px solid rgba(226,232,240,.9);
  animation: pillFloat 4.5s ease-in-out infinite; z-index: 3; white-space: nowrap;
}
.float-check { color: var(--color-success); font-weight: 900; font-size: 15px; }
.float-tag-1 { left: -8%; top: 26%; }
.float-tag-2 { right: -6%; bottom: 20%; animation-delay: 1.4s; }
@keyframes pillFloat { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

@media (max-width: 768px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-content { text-align: center; }
  .hero-cta { align-items: center; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 14px; padding: 18px; }
  .hero-stat:nth-child(3)::before, .hero-stat:nth-child(4)::before { display: none; }
  .hero { padding: calc(var(--nav-height) + 16px) 0 40px; min-height: auto; }
  .hero h1 { font-size: clamp(24px, 6.5vw, 34px); }
  .hero .lead { font-size: clamp(15px, 2.2vw, 17px); margin-bottom: 20px; }
  .hero-cta .btn-lg { padding: 13px 30px; font-size: 16px; }
  .hero-stat .number { font-size: clamp(20px, 5.5vw, 24px); }
  .float-tag-1 { left: 2%; top: 12%; }
  .float-tag-2 { right: 2%; bottom: 10%; }
}

/* ================= 通用工具类 ================= */
.section-bg-gray { background: var(--color-bg-gray); }
.section-bg-soft { background: var(--color-bg-soft); }
.section-bg-dark { background: linear-gradient(135deg, #101828 0%, #1E3A8A 100%); color: #E5E7EB; }
.fade-in { opacity: 1; transform: none; }
.has-io .fade-in { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.has-io .fade-in.visible { opacity: 1; transform: translateY(0); }
.fade-in-delay-1 { transition-delay: .1s; }
.fade-in-delay-2 { transition-delay: .2s; }
.fade-in-delay-3 { transition-delay: .3s; }

/* ================= 特色 / 服务卡片网格 ================= */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card {
  background: #fff; border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg); padding: 30px 26px;
  transition: all var(--transition); position: relative; overflow: hidden;
}
.feature-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--color-gradient); opacity: 0; transition: opacity var(--transition);
}
.feature-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-xl); border-color: rgba(10,61,145,.16); }
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 54px; height: 54px; border-radius: 14px; margin-bottom: 18px;
  background: var(--color-gradient-light); color: var(--color-primary);
  display: flex; align-items: center; justify-content: center;
  box-shadow: inset 0 0 0 1px rgba(10,61,145,.06);
  transition: all var(--transition);
}
.feature-icon svg { width: 26px; height: 26px; stroke: currentColor; fill: none; stroke-width: 1.8; }
.feature-card:hover .feature-icon { background: var(--color-gradient); color: #fff; box-shadow: 0 8px 18px rgba(10,61,145,.28); }
.feature-card h3 { margin-bottom: 10px; font-size: 18px; }
.feature-card p { font-size: 14.5px; color: var(--color-text-muted); line-height: 1.75; }
.feature-card ul { margin-top: 12px; padding-left: 0; }
.feature-card ul li { position: relative; padding-left: 20px; font-size: 14px; color: var(--color-text-body); margin-bottom: 6px; }
.feature-card ul li::before { content: ''; position: absolute; left: 0; top: 8px; width: 6px; height: 6px; border-radius: 50%; background: var(--color-gradient); }

/* ================= 流程步骤 ================= */
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
.step-card { background: #fff; border: 1px solid var(--color-border-light); border-radius: var(--radius-lg); padding: 26px 22px; position: relative; transition: all var(--transition); }
.step-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.step-num { font-size: 40px; font-weight: 800; line-height: 1; background: var(--color-gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; margin-bottom: 14px; opacity: .92; }
.step-card h4 { margin-bottom: 8px; }
.step-card p { font-size: 14px; color: var(--color-text-muted); }

/* ================= 合作模式定价卡片 ================= */
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.pricing-card {
  background: #fff; border: 1px solid var(--color-border-light); border-radius: var(--radius-xl);
  padding: 36px 30px; display: flex; flex-direction: column;
  transition: all var(--transition); position: relative;
}
.pricing-card.featured { border: 2px solid transparent; background: linear-gradient(#fff, #fff) padding-box, var(--color-gradient) border-box; box-shadow: var(--shadow-xl); }
.pricing-card.featured .pricing-badge { position: absolute; top: -14px; left: 50%; transform: translateX(-50%); background: var(--color-gradient); color: #fff; font-size: 13px; font-weight: 600; padding: 6px 18px; border-radius: 100px; white-space: nowrap; }
.pricing-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-xl); }
.pricing-card h3 { font-size: 20px; margin-bottom: 6px; }
.pricing-card .pricing-desc { font-size: 14px; color: var(--color-text-muted); margin-bottom: 18px; min-height: 44px; }
.pricing-card .pricing-price { font-size: 15px; font-weight: 700; color: var(--color-primary); margin-bottom: 22px; }
.pricing-card ul { margin-bottom: 26px; flex: 1; }
.pricing-card ul li { position: relative; padding-left: 22px; font-size: 14px; color: var(--color-text-body); margin-bottom: 10px; }
.pricing-card ul li::before { content: '✓'; position: absolute; left: 0; top: 0; color: var(--color-success); font-weight: 700; }

/* ================= 案例卡片 ================= */
.cases-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.case-card { background: #fff; border: 1px solid var(--color-border-light); border-radius: var(--radius-xl); padding: 30px; transition: all var(--transition); overflow: hidden; display: flex; flex-direction: column; }
.case-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-xl); }
.case-card .case-body { flex: 1; }
.case-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.case-tag { font-size: 13px; font-weight: 600; color: var(--color-primary); background: rgba(10,61,145,.07); padding: 5px 14px; border-radius: 100px; }
.case-industry { font-size: 13px; color: var(--color-text-muted); }
.case-body h3 { font-size: 20px; margin-bottom: 10px; }
.case-body p { font-size: 15px; color: var(--color-text-muted); line-height: 1.7; }
.case-metrics { display: flex; gap: 32px; margin-top: 22px; padding-top: 18px; border-top: 1px dashed var(--color-border); }
.case-card .case-metrics { margin-top: auto; padding-top: 18px; }
.case-metric .value { font-size: 26px; font-weight: 800; background: var(--color-gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.case-metric .label { font-size: 13px; color: var(--color-text-muted); margin-top: 2px; }

/* ================= 行业网格 ================= */
.industries-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.industry-card { background: #fff; border: 1px solid var(--color-border-light); border-radius: var(--radius-lg); padding: 22px 18px; transition: all var(--transition); text-align: left; }
.industry-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: rgba(10,61,145,.2); }
.industry-card .icon { width: 42px; height: 42px; border-radius: 11px; background: var(--color-gradient-light); color: var(--color-primary); display: flex; align-items: center; justify-content: center; margin-bottom: 14px; transition: all var(--transition); }
.industry-card .icon svg { width: 21px; height: 21px; stroke: currentColor; fill: none; stroke-width: 1.8; }
.industry-card:hover .icon { background: var(--color-gradient); color: #fff; box-shadow: 0 6px 16px rgba(10,61,145,.26); }
.industry-card h4 { font-size: 16px; margin-bottom: 6px; }
.industry-card p { font-size: 13px; color: var(--color-text-muted); line-height: 1.6; }

/* ================= 创始人区 ================= */
.founder-wrap { display: grid; grid-template-columns: 1fr 1.6fr; gap: 48px; align-items: center; background: linear-gradient(135deg, #F5F8FF, #EDF4FF); border-radius: var(--radius-xl); padding: 52px; overflow: hidden; position: relative; }
.founder-avatar {
  width: 200px; height: 200px; border-radius: 50%; margin: 0 auto;
  background: var(--color-gradient); display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 72px; font-weight: 800; box-shadow: var(--shadow-xl);
}
.founder-meta h2 { margin-bottom: 20px; }
.founder-meta h2 span { display: block; font-size: 16px; color: var(--color-primary); margin-bottom: 8px; letter-spacing: .08em; }
.founder-meta p { color: var(--color-text-body); margin-bottom: 14px; }

/* ================= FAQ ================= */
.faq-wrap { max-width: 860px; margin: 0 auto; }
.faq-item { background: #fff; border: 1px solid var(--color-border-light); border-radius: var(--radius-md); margin-bottom: 14px; overflow: hidden; transition: all var(--transition); }
.faq-item.open { border-color: rgba(10,61,145,.25); box-shadow: var(--shadow-sm); }
.faq-question { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 20px 24px; cursor: pointer; font-weight: 600; color: var(--color-text-title); font-size: 16px; }
.faq-question .icon { width: 24px; height: 24px; flex-shrink: 0; color: var(--color-primary); transition: transform var(--transition); }
.faq-question .icon svg { width: 100%; height: 100%; stroke: currentColor; fill: none; stroke-width: 2; }
.faq-item.open .faq-question .icon { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .4s ease; padding: 0 24px; }
.faq-item.open .faq-answer { max-height: 1200px; padding: 0 24px 22px; }
.faq-answer p { font-size: 15px; color: var(--color-text-body); margin-bottom: 10px; }
.faq-answer p:last-child { margin-bottom: 0; }
.faq-answer ul, .faq-answer ol { padding-left: 20px; margin: 10px 0; }
.faq-answer li { font-size: 15px; color: var(--color-text-body); margin-bottom: 6px; }

/* ================= CTA banner ================= */
.cta-banner { position: relative; border-radius: var(--radius-xl); padding: 60px 48px; background: var(--color-gradient); background-size: 150% 150%; color: #fff; text-align: center; overflow: hidden; }
.cta-banner::before { content: ''; position: absolute; inset: 0; background: radial-gradient(ellipse 60% 80% at 20% 20%, rgba(255,255,255,.16), transparent 60%); }
.cta-banner h2 { color: #fff; font-size: clamp(24px, 3vw, 34px); margin-bottom: 14px; position: relative; }
.cta-banner p { color: rgba(255,255,255,.92); max-width: 560px; margin: 0 auto 28px; font-size: 16px; position: relative; }
.cta-banner .cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; position: relative; }
.cta-phone-lg { display: inline-flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 800; color: #fff; padding: 12px 8px; }
.cta-phone-lg .phone-icon { width: 44px; height: 44px; border-radius: 50%; background: rgba(255,255,255,.2); display: flex; align-items: center; justify-content: center; }
.cta-phone-lg .phone-icon svg { width: 22px; height: 22px; stroke: #fff; fill: none; stroke-width: 2; }

/* ================= 联系方式卡片 ================= */
.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.contact-card { background: #fff; border: 1px solid var(--color-border-light); border-radius: var(--radius-lg); padding: 30px 26px; text-align: center; transition: all var(--transition); }
.contact-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.contact-card .contact-icon { width: 62px; height: 62px; margin: 0 auto 18px; border-radius: 16px; background: var(--color-gradient-light); color: var(--color-primary); display: flex; align-items: center; justify-content: center; }
.contact-card .contact-icon svg { width: 30px; height: 30px; stroke: currentColor; fill: none; stroke-width: 1.6; }
.contact-card h3 { font-size: 18px; margin-bottom: 8px; }
.contact-card p { font-size: 14px; color: var(--color-text-muted); line-height: 1.7; }
.contact-card .contact-phone { font-size: 22px; font-weight: 800; color: var(--color-primary); }
.contact-card .btn { margin-top: 16px; }

/* ================= 自媒体卡片 ================= */
.social-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.social-card { background: #fff; border: 1px solid var(--color-border-light); border-radius: var(--radius-lg); padding: 30px 26px; text-align: center; transition: all var(--transition); cursor: pointer; position: relative; }
.social-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-xl); border-color: rgba(10,61,145,.2); }
.social-card:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.social-card .social-icon { width: 62px; height: 62px; margin: 0 auto 18px; border-radius: 50%; display: flex; align-items: center; justify-content: center; color: #fff; }
.social-card .social-icon svg { width: 30px; height: 30px; }
.social-card .social-icon.gongzhonghao { background: linear-gradient(135deg, #00B96B, #00D27A); }
.social-card .social-icon.douyin { background: linear-gradient(135deg, #161823, #26242C); }
.social-card .social-icon.shipinhao { background: linear-gradient(135deg, #FA709A, #F977A5); }
.social-card h3 { font-size: 18px; margin-bottom: 6px; }
.social-card .social-name { font-size: 15px; font-weight: 600; color: var(--color-primary); margin-bottom: 8px; }
.social-card p { font-size: 13px; color: var(--color-text-muted); line-height: 1.6; }
.social-card .copy-tip { display: inline-flex; align-items: center; gap: 5px; margin-top: 14px; padding: 7px 16px; font-size: 13px; font-weight: 600; color: var(--color-primary); background: var(--color-bg-soft); border-radius: 100px; border: 1px dashed rgba(10,61,145,.3); transition: all var(--transition); }
.social-card:hover .copy-tip { border-style: solid; background: rgba(10,61,145,.08); }
/* 社交弹层 */
.social-modal-backdrop { position: fixed; inset: 0; z-index: 9000; background: rgba(10,20,40,.55); display: flex; align-items: center; justify-content: center; padding: 24px; opacity: 0; pointer-events: none; transition: opacity .25s ease; }
.social-modal-backdrop.open { opacity: 1; pointer-events: auto; }
.social-modal { width: 100%; max-width: 420px; background: #fff; border-radius: var(--radius-xl); padding: 36px 32px 32px; text-align: center; box-shadow: 0 24px 60px rgba(0,0,0,.35); transform: translateY(16px) scale(.98); transition: transform .25s ease; }
.social-modal-backdrop.open .social-modal { transform: translateY(0) scale(1); }
.social-modal .modal-icon { width: 72px; height: 72px; margin: 0 auto 16px; border-radius: 50%; display: flex; align-items: center; justify-content: center; color: #fff; }
.social-modal .modal-icon svg { width: 36px; height: 36px; }
.social-modal .modal-icon.gongzhonghao { background: linear-gradient(135deg, #00B96B, #00D27A); }
.social-modal .modal-icon.douyin { background: linear-gradient(135deg, #161823, #26242C); }
.social-modal .modal-icon.shipinhao { background: linear-gradient(135deg, #FA709A, #F977A5); }
.social-modal h3 { font-size: 22px; margin-bottom: 8px; }
.social-modal .modal-desc { color: var(--color-text-muted); font-size: 14px; line-height: 1.7; margin-bottom: 16px; }
.social-modal .modal-name-box { background: var(--color-bg-gray); border: 1px solid var(--color-border-light); border-radius: var(--radius-md); padding: 14px 16px; font-size: 17px; font-weight: 700; color: var(--color-text-title); margin-bottom: 12px; }
.social-modal .modal-hint { font-size: 13px; color: var(--color-text-muted); line-height: 1.7; margin-bottom: 20px; }
.social-modal .modal-actions { display: flex; gap: 12px; justify-content: center; }
.social-modal .btn { flex: 1; padding: 12px 16px; font-size: 15px; }
.social-modal .btn-copy { background: var(--color-gradient); color: #fff; box-shadow: var(--shadow-primary); }
.social-modal .btn-close { background: var(--color-bg-gray); color: var(--color-text-body); border: 1px solid var(--color-border); }
.social-modal .copied-msg { margin-top: 12px; font-size: 13px; font-weight: 600; color: var(--color-success); opacity: 0; transition: opacity .2s ease; }
.social-modal .copied-msg.show { opacity: 1; }
.social-modal-close-x { position: absolute; top: 14px; right: 18px; font-size: 22px; line-height: 1; color: var(--color-text-muted); background: none; border: none; cursor: pointer; }
.social-modal-close-x:hover { color: var(--color-text-title); }

/* ================= 内页 Header ================= */
.page-header {
  padding: calc(var(--nav-height) + 48px) 0 64px;
  background:
    radial-gradient(ellipse 70% 70% at 15% 0%, rgba(10,61,145,0.1) 0%, transparent 60%),
    radial-gradient(ellipse 60% 60% at 90% 10%, rgba(30,136,229,0.1) 0%, transparent 60%),
    linear-gradient(180deg, #F5F8FF 0%, #FFFFFF 100%);
  text-align: center; position: relative; overflow: hidden;
}
.page-header::before { content: ''; position: absolute; inset: 0; background-image: linear-gradient(rgba(10,61,145,0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(10,61,145,0.04) 1px, transparent 1px); background-size: 48px 48px; mask-image: radial-gradient(ellipse 60% 60% at 50% 30%, #000 30%, transparent 75%); -webkit-mask-image: radial-gradient(ellipse 60% 60% at 50% 30%, #000 30%, transparent 75%); pointer-events: none; }
.page-header .container { position: relative; z-index: 2; }
.page-header h1 { margin-bottom: 14px; }
.page-header p { font-size: 17px; color: var(--color-text-muted); max-width: 640px; margin: 0 auto; }
.breadcrumb { font-size: 13px; color: var(--color-text-muted); margin-bottom: 20px; }
.breadcrumb a { color: var(--color-primary); }

/* ================= 内容布局 ================= */
.content-section { padding: 80px 0 110px; }
.content-grid { display: grid; grid-template-columns: 1fr 300px; gap: 48px; align-items: start; }
.content-main h2 { margin: 40px 0 18px; position: relative; padding-left: 16px; }
.content-main h2::before { content: ''; position: absolute; left: 0; top: 6px; bottom: 6px; width: 4px; border-radius: 4px; background: var(--color-gradient); }
.content-main h2:first-child { margin-top: 0; }
.content-main h3 { margin: 26px 0 12px; }
.content-main p { font-size: 16px; color: var(--color-text-body); margin-bottom: 14px; }
.content-main ul, .content-main ol { padding-left: 22px; margin-bottom: 16px; }
.content-main li { font-size: 15px; color: var(--color-text-body); margin-bottom: 8px; }
.content-main ul li { list-style: disc; }
.content-main ol li { list-style: decimal; }
.content-main blockquote { border-left: 4px solid var(--color-primary); background: var(--color-bg-soft); padding: 18px 24px; border-radius: 0 var(--radius-md) var(--radius-md) 0; margin: 24px 0; color: var(--color-text-body); font-size: 15px; }
.content-main table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 14px; }
.content-main table th { background: var(--color-bg-soft); color: var(--color-text-title); font-weight: 600; padding: 12px 16px; text-align: left; border: 1px solid var(--color-border); }
.content-main table td { padding: 12px 16px; border: 1px solid var(--color-border); color: var(--color-text-body); }

.content-sidebar { position: sticky; top: calc(var(--nav-height) + 24px); display: flex; flex-direction: column; gap: 20px; }
.sidebar-card { background: #fff; border: 1px solid var(--color-border-light); border-radius: var(--radius-lg); padding: 24px; }
.sidebar-card h4 { font-size: 15px; margin-bottom: 14px; color: var(--color-text-title); }
.sidebar-nav { display: flex; flex-direction: column; gap: 2px; }
.sidebar-nav a { padding: 8px 12px; border-radius: 8px; font-size: 14px; color: var(--color-text-body); transition: all .2s; }
.sidebar-nav a:hover { background: var(--color-bg-soft); color: var(--color-primary); }

/* ================= 诊断布局 ================= */
.diagnosis-section { padding: 60px 0 90px; }
.diagnosis-wrap { display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px; align-items: start; }
.diagnosis-info h2 { margin-bottom: 12px; }
.diagnosis-info > p { color: var(--color-text-muted); margin-bottom: 28px; }
.diagnosis-features { display: flex; flex-direction: column; gap: 16px; }
.diag-feature { display: flex; gap: 16px; align-items: flex-start; background: #fff; border: 1px solid var(--color-border-light); border-radius: var(--radius-md); padding: 20px; transition: all var(--transition); }
.diag-feature:hover { box-shadow: var(--shadow-md); border-color: rgba(10,61,145,.2); }
.diag-feature .icon { width: 44px; height: 44px; flex-shrink: 0; border-radius: 12px; background: var(--color-gradient-light); color: var(--color-primary); display: flex; align-items: center; justify-content: center; }
.diag-feature .icon svg { width: 22px; height: 22px; stroke: currentColor; fill: none; stroke-width: 1.8; }
.diag-feature h4 { font-size: 16px; margin-bottom: 4px; }
.diag-feature p { font-size: 14px; color: var(--color-text-muted); line-height: 1.6; }
.diag-feature.diag-link { cursor: pointer; }
.diag-feature.diag-link:hover { border-color: rgba(10,61,145,.4); box-shadow: var(--shadow-primary); transform: translateY(-2px); }
.diag-feature.diag-link:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.diag-feature.diag-link .link-hint { display: inline-block; margin-left: 6px; padding: 2px 10px; font-size: 12px; font-weight: 600; color: var(--color-primary); background: var(--color-bg-soft); border-radius: 100px; border: 1px solid rgba(10,61,145,.2); }
.social-modal .btn-open-link { background: var(--color-gradient); color: #fff; box-shadow: var(--shadow-primary); }
.social-modal .modal-name-box.link { color: var(--color-primary); }

.contact-strong-card { background: linear-gradient(135deg, #F5F8FF, #EDF4FF); border: 1px solid rgba(10,61,145,.15); border-radius: var(--radius-lg); padding: 32px; }
.contact-strong-card h3 { margin-bottom: 20px; }
.contact-strong-card .cs-item { display: flex; align-items: center; gap: 14px; padding: 12px 0; border-bottom: 1px dashed var(--color-border); }
.contact-strong-card .cs-item:last-child { border-bottom: none; }
.contact-strong-card .cs-icon { width: 40px; height: 40px; flex-shrink: 0; border-radius: 10px; background: var(--color-gradient); color: #fff; display: flex; align-items: center; justify-content: center; }
.contact-strong-card .cs-icon svg { width: 20px; height: 20px; stroke: #fff; fill: none; stroke-width: 2; }
.contact-strong-card .cs-label { font-size: 13px; color: var(--color-text-muted); }
.contact-strong-card .cs-value { font-size: 16px; font-weight: 700; color: var(--color-text-title); }
.contact-strong-card .cs-value.phone { font-size: 22px; color: var(--color-primary); }
.contact-strong-card .btn { margin-top: 16px; width: 100%; }
.contact-strong-card .cs-wechat-qr { margin-top: 16px; text-align: center; padding: 16px; background: #fff; border: 1px solid var(--color-border-light); border-radius: var(--radius-md); }
.contact-strong-card .cs-wechat-qr img { width: 180px; margin: 0 auto 10px; border-radius: 10px; display: block; }
.contact-strong-card .cs-wechat-qr p { font-size: 13px; color: var(--color-text-muted); line-height: 1.6; }

/* ================= Footer ================= */
.footer { background: linear-gradient(180deg, #0A3D91 0%, #072B6A 100%); color: #C6D2E8; padding: 72px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr 1.4fr; gap: 40px; padding-bottom: 48px; }
.footer-brand .logo { display: flex; align-items: center; gap: 12px; font-size: 20px; font-weight: 700; color: #fff; margin-bottom: 16px; }
.footer-brand .logo img { width: 40px; height: 40px; border-radius: 10px; }
.footer-brand p { font-size: 14px; line-height: 1.8; }
.footer h4 { color: #fff; font-size: 16px; margin-bottom: 18px; }
.footer ul li { margin-bottom: 10px; }
.footer ul a { color: #C6D2E8; font-size: 14px; transition: color .2s; }
.footer ul a:hover { color: #fff; }
.footer-contact li { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; line-height: 1.7; }
.footer-contact .icon { flex-shrink: 0; }
.footer-social { margin-top: 20px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.12); }
.footer-social .fs-item { display: flex; align-items: center; gap: 10px; font-size: 14px; margin-bottom: 8px; color: #C6D2E8; }
.footer-social .fs-item .fs-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.footer-social .fs-item .fs-dot.wechat { background: #00B96B; }
.footer-social .fs-item .fs-dot.douyin { background: #1E88E5; }
.footer-social .fs-item .fs-dot.shipinhao { background: #FA709A; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); padding: 20px 0; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 13px; color: #93A5C8; }

/* ================= 回到顶部 ================= */
.scroll-top { position: fixed; right: 28px; bottom: 28px; width: 48px; height: 48px; border-radius: 14px; border: none; background: var(--color-gradient); color: #fff; cursor: pointer; display: flex; align-items: center; justify-content: center; box-shadow: var(--shadow-primary); opacity: 0; transform: translateY(16px); pointer-events: none; transition: all var(--transition); z-index: 999; }
.scroll-top.visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.scroll-top svg { width: 22px; height: 22px; stroke: currentColor; fill: none; stroke-width: 2.5; }

/* ================= 错误页 ================= */
.error-page { min-height: 70vh; display: flex; align-items: center; justify-content: center; text-align: center; padding: 120px 24px 80px; }
.error-code { font-size: 120px; font-weight: 800; line-height: 1; background: var(--color-gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.error-page h1 { margin: 16px 0 12px; }
.error-page p { color: var(--color-text-muted); margin-bottom: 28px; }

/* ================= 响应式 ================= */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .industries-grid { grid-template-columns: repeat(3, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(3, 1fr); }
  .content-grid { grid-template-columns: 1fr; }
  .content-sidebar { position: static; flex-direction: row; flex-wrap: wrap; }
  .sidebar-card { flex: 1; min-width: 220px; }
  .diagnosis-wrap { grid-template-columns: 1fr; }
  .founder-wrap { grid-template-columns: 1fr; text-align: center; padding: 40px 28px; }
  .hero-inner { grid-template-columns: 1fr; gap: 44px; }
}
@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .section-title { margin-bottom: 36px; }
  .features-grid, .pricing-grid, .contact-grid, .social-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .industries-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .cta-banner { padding: 48px 24px; }
  .case-metrics { gap: 20px; flex-wrap: wrap; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .hero-cta { flex-direction: column; align-items: center; }
  .hero-cta .btn { width: 100%; max-width: 320px; }
  .contact-strong-card { padding: 24px; }
}
@media (max-width: 480px) {
  .industries-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .container { padding: 0 16px; }
}

/* 创始人区 v2：照片+二维码+自媒体合一 */
.founder-section { padding: 40px 0 48px; }
.founder-hero {
  display: grid; grid-template-columns: 360px 1fr; gap: 52px; align-items: center;
  padding: 24px 0; position: relative;
  background: transparent; border-radius: 0;
}
.founder-hero::before { content: none; }
.founder-left { display: flex; flex-direction: column; align-items: center; gap: 20px; }
.founder-photo {
  width: 240px; height: 300px; border-radius: 20px; overflow: hidden;
  background: var(--color-gradient); display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 80px; font-weight: 800; box-shadow: var(--shadow-xl); position: relative;
}
.founder-photo img { width: 100%; height: 100%; object-fit: cover; }
.founder-photo .photo-tag { position: absolute; bottom: 0; left: 0; right: 0; background: rgba(16,24,40,.45); color: #fff; font-size: 13px; padding: 6px 0; text-align: center; }
.founder-wechat-qr {
  width: 200px; padding: 14px; background: #fff; border: 1px solid var(--color-border-light);
  border-radius: 16px; text-align: center; box-shadow: var(--shadow-primary);
}
.founder-wechat-qr .qr-placeholder {
  width: 100%; aspect-ratio: 1/1; border-radius: 10px; display: flex; align-items: center; justify-content: center;
  background: repeating-linear-gradient(45deg, #F3F6FA, #F3F6FA 10px, #E9EEF5 10px, #E9EEF5 20px);
  color: var(--color-text-muted); font-size: 14px; line-height: 1.6;
}
.founder-wechat-qr img { width: 100%; height: auto; border-radius: 10px; display: block; }
.founder-wechat-qr p { font-size: 13px; color: var(--color-text-muted); margin-top: 10px; line-height: 1.5; }
.founder-info h2 { margin-bottom: 20px; }
.founder-info h2 span { display: block; font-size: 16px; color: var(--color-primary); margin-bottom: 8px; letter-spacing: .08em; }
.founder-info p { color: var(--color-text-body); margin-bottom: 14px; line-height: 1.75; }
.founder-info .founder-quote { font-weight: 600; color: var(--color-primary); margin-top: 16px; font-size: 17px; }
.founder-social { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 32px; }
@media (max-width: 1024px) {
  .founder-hero { grid-template-columns: 1fr; text-align: center; padding: 40px 28px; }
  .founder-social { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .founder-photo { width: 180px; height: 225px; }
}

/* 案例卡片可点击 + 详情链接 */
.case-card-link { display: block; text-decoration: none; color: inherit; cursor: pointer; position: relative; }
.case-card-link:hover h3 { color: var(--color-primary); }
.case-detail-link { margin-top: 20px; padding-top: 16px; border-top: 1px dashed var(--color-border); font-size: 14px; font-weight: 600; color: var(--color-primary); display: flex; align-items: center; gap: 6px; transition: all .2s ease; }
.case-card-link:hover .case-detail-link { gap: 12px; }

/* 案例详情页 */
.case-detail { max-width: 860px; margin: 0 auto; }
.case-detail .back-link { display: inline-flex; align-items: center; gap: 8px; color: var(--color-text-muted); font-size: 14px; margin-bottom: 28px; text-decoration: none; transition: color .2s ease; }
.case-detail .back-link:hover { color: var(--color-primary); }
.case-detail-hero { padding: 8px 0 32px; margin-bottom: 8px; }
.case-detail-hero .case-tag { display: inline-block; margin-bottom: 16px; }
.case-detail-hero h1 { font-size: 32px; margin-bottom: 16px; line-height: 1.35; }
.case-detail-hero .case-detail-brief { color: var(--color-text-muted); font-size: 16px; line-height: 1.8; max-width: 780px; }
.case-detail-metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 28px 0 8px; max-width: 780px; }
.case-detail-metrics .case-metric { background: var(--color-bg-soft); border: 1px solid var(--color-border-light); border-radius: var(--radius-lg); padding: 18px 20px; text-align: center; }
.case-detail-metrics .case-metric .value { font-size: 30px; font-weight: 800; background: var(--color-gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.case-detail-section { margin-bottom: 36px; }
.case-detail-section h2 { font-size: 22px; margin-bottom: 16px; position: relative; padding-left: 16px; }
.case-detail-section h2::before { content: ''; position: absolute; left: 0; top: 4px; bottom: 4px; width: 4px; border-radius: 4px; background: var(--color-gradient); }
.case-detail-section p { color: var(--color-text-body); line-height: 1.8; margin-bottom: 12px; }
.case-detail-section ul, .case-detail-section ol { padding-left: 22px; margin-bottom: 12px; }
.case-detail-section li { color: var(--color-text-body); line-height: 1.8; margin-bottom: 8px; }
.case-detail-section h3 { font-size: 17px; margin: 20px 0 10px; color: var(--color-text-title); }
.case-detail-gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 20px; }
.case-detail-gallery .gallery-item { aspect-ratio: 4/3; border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--color-border-light); background: repeating-linear-gradient(45deg, #F7F9FC, #F7F9FC 12px, #EEF2F7 12px, #EEF2F7 24px); display: flex; align-items: center; justify-content: center; color: var(--color-text-muted); font-size: 13px; }
.case-detail-gallery .gallery-item.has-img { display: block; aspect-ratio: auto; background: #fff; }
.case-detail-gallery .gallery-item.has-img img { width: 100%; aspect-ratio: 4/3; object-fit: cover; display: block; border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
.case-detail-gallery .gallery-item.has-img figcaption { padding: 10px 12px; font-size: 13px; line-height: 1.6; color: var(--color-text-body); background: #fff; border-top: 1px solid var(--color-border-light); }
.case-section-imgs { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 24px; align-items: start; }
.case-section-img { margin: 0; border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--color-border-light); background: #fff; box-shadow: 0 2px 10px rgba(15, 42, 90, 0.06); }
.case-section-img img { width: 100%; height: auto; display: block; background: #F8FAFC; cursor: zoom-in; }
.case-section-img--tall { display: flex; flex-direction: column; }
.case-section-img--tall img { width: auto; max-width: 100%; max-height: 640px; margin: 0 auto; }
.case-section-img figcaption { padding: 10px 14px; font-size: 13px; line-height: 1.6; color: var(--color-text-body); border-top: 1px solid var(--color-border-light); background: #FBFCFE; }
.case-detail-cta { margin-top: 48px; padding: 32px; background: var(--color-bg-soft); border-radius: var(--radius-lg); text-align: center; }
@media (max-width: 768px) {
  .case-detail-metrics { grid-template-columns: 1fr; }
  .case-detail-gallery { grid-template-columns: 1fr; }
  .case-section-imgs { grid-template-columns: 1fr; }
  .case-detail-hero h1 { font-size: 24px; }
  .case-detail-hero { padding: 4px 0 24px; }
}

/* 案例图片点击放大（Lightbox） */
.case-lightbox { position: fixed; inset: 0; z-index: 9999; display: flex; align-items: center; justify-content: center; opacity: 0; pointer-events: none; transition: opacity .25s ease; }
.case-lightbox.open { opacity: 1; pointer-events: auto; }
.case-lightbox-backdrop { position: absolute; inset: 0; background: rgba(10, 20, 40, 0.88); }
.case-lightbox-content { position: relative; max-width: 92vw; max-height: 90vh; display: flex; flex-direction: column; align-items: center; background: #fff; border-radius: 12px; padding: 14px; box-shadow: 0 24px 60px rgba(0,0,0,.4); }
.case-lightbox-content img { max-width: 100%; max-height: 78vh; object-fit: contain; border-radius: 8px; display: block; }
.case-lightbox-content figcaption { margin-top: 10px; font-size: 14px; color: #444; text-align: center; line-height: 1.6; padding: 0 8px; }
.case-lightbox-close { position: absolute; top: -14px; right: -14px; width: 34px; height: 34px; border-radius: 50%; border: none; background: #fff; color: #333; font-size: 20px; line-height: 1; cursor: pointer; box-shadow: 0 2px 10px rgba(0,0,0,.25); display: flex; align-items: center; justify-content: center; transition: transform .15s ease; }
.case-lightbox-close:hover { transform: scale(1.1); }

/* 全局微光背景（浅色统一） */
body {
  background: linear-gradient(180deg, #FBFDFF 0%, #FFFFFF 45%, #F5F8FF 100%);
  background-attachment: fixed;
}

/* 按钮：双层阴影，hover 上浮（克制版） */
.btn-primary { box-shadow: 0 6px 18px rgba(10,61,145,.24), 0 2px 6px rgba(10,61,145,.12); }
.btn-primary:hover { transform: translateY(-2px) scale(1.01); box-shadow: 0 14px 34px rgba(10,61,145,.34); }

/* 区块标题：h2 下渐变短线 */
.section-title h2 { position: relative; margin-bottom: 24px; }
.section-title h2::after {
  content: ''; position: absolute; left: 50%; transform: translateX(-50%);
  bottom: -10px; width: 56px; height: 4px; border-radius: 4px;
  background: var(--color-gradient);
}

/* 灰底区块：极淡网格纹理 */
.section-bg-gray { position: relative; }
.section-bg-gray::before {
  content: ''; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(10,61,145,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10,61,145,.03) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(180deg, #000 8%, transparent 92%);
  -webkit-mask-image: linear-gradient(180deg, #000 8%, transparent 92%);
  pointer-events: none;
}
.section-bg-gray .container, .section-bg-soft .container { position: relative; z-index: 1; }

/* 页脚：顶部渐变线 */
.footer { position: relative; }
.footer::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, rgba(30,136,229,.5), rgba(10,61,145,.5), transparent);
}
.footer .container { position: relative; z-index: 1; }