/* =====================================================
   康奇胶囊 落地页 — 现代医疗健康品牌风格
   配色：医疗蓝 #1a6fb5 + 橙金 #d4821a + 纯白底
   字体：Noto Sans SC + Poppins
   ===================================================== */

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

:root {
  --white: #ffffff;
  --bg: #ffffff;
  --bg-soft: #f6f9fc;
  --bg-gray: #f4f6f8;
  --bg-blue-tint: #eef5fc;
  --text: #1a1a1a;
  --text-2: #333333;
  --text-3: #666666;
  --text-4: #999999;
  --border: #e8ecf0;
  --border-strong: #d9dfe6;
  --blue: #1a6fb5;
  --blue-dark: #0f5792;
  --blue-light: #e8f2fb;
  --blue-hover: #155d99;
  --orange: #d4821a;
  --orange-light: #fdf2e1;
  --orange-hover: #b96f13;
  --green: #3a9d6c;
  --radius: 10px;
  --radius-sm: 6px;
  --radius-lg: 16px;
  --shadow-sm: 0 2px 8px rgba(26,111,181,0.06);
  --shadow-md: 0 6px 24px rgba(26,111,181,0.08);
  --shadow-lg: 0 12px 40px rgba(26,111,181,0.12);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --max-w: 1200px;
}

html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }

/* ============ 通用 ============ */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 2rem);
}
section { padding: clamp(3.5rem, 8vw, 6rem) 0; position: relative; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: 'Poppins', sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--blue);
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.eyebrow::before {
  content: '';
  width: 1.75rem;
  height: 2px;
  background: var(--orange);
  border-radius: 2px;
}
.eyebrow.center { justify-content: center; }
.eyebrow.center::before { display: none; }
.eyebrow.center::after {
  content: '';
  width: 1.75rem;
  height: 2px;
  background: var(--orange);
  border-radius: 2px;
}

.section-title {
  font-size: clamp(1.6rem, 3.3vw, 2.4rem);
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
  margin-bottom: 0.75rem;
}
.section-subtitle {
  font-size: 1rem;
  color: var(--text-3);
  max-width: 42rem;
  line-height: 1.8;
}
.section-header { text-align: center; margin-bottom: clamp(2.5rem, 5vw, 3.5rem); }
.section-header .section-subtitle { margin: 0 auto; }
.section-header .title-bar {
  width: 44px;
  height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--orange));
  border-radius: 3px;
  margin: 1.25rem auto 0;
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.85rem;
  border-radius: var(--radius-sm);
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  transition: all 0.3s var(--ease);
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 4px 14px rgba(26,111,181,0.25);
}
.btn-primary:hover {
  background: var(--blue-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(26,111,181,0.35);
}
.btn-ghost {
  background: transparent;
  color: var(--blue);
  border: 1.5px solid var(--blue);
}
.btn-ghost:hover {
  background: var(--blue);
  color: #fff;
}
.btn-white {
  background: #fff;
  color: var(--blue);
}
.btn-white:hover {
  background: var(--blue-light);
  transform: translateY(-2px);
}
.btn-lg { padding: 1rem 2.4rem; font-size: 1rem; }

/* ============ 动画 ============ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.75s var(--ease), transform 0.75s var(--ease);
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

@keyframes pulse-ring {
  0% { box-shadow: 0 0 0 0 rgba(26,111,181,0.4); }
  70% { box-shadow: 0 0 0 12px rgba(26,111,181,0); }
  100% { box-shadow: 0 0 0 0 rgba(26,111,181,0); }
}
@keyframes float-y {
  0%,100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}


/* ============ HERO ============ */
.hero {
  padding-top: 120px;
  padding-bottom: clamp(3rem, 6vw, 5rem);
  background: linear-gradient(135deg, #f6f9fc 0%, #ffffff 55%, #eef5fc 100%);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  right: -120px;
  top: -80px;
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, rgba(26,111,181,0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  left: -60px;
  bottom: -100px;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(212,130,26,0.06) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.9rem;
  background: var(--blue-light);
  color: var(--blue);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}
.hero-badge .dot {
  width: 6px; height: 6px;
  background: var(--blue);
  border-radius: 50%;
  animation: pulse-ring 2s infinite;
}
.hero h1 {
  font-family: 'Noto Serif SC', 'Noto Sans SC', serif;
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text);
  margin-bottom: 0.5rem;
}
.hero h1 .accent-blue { color: var(--blue); }
.hero h1 .accent-orange {
  color: var(--orange);
  position: relative;
  display: inline-block;
}
.hero-brand-en {
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
  font-size: clamp(0.9rem, 1.4vw, 1.1rem);
  color: var(--text-4);
  letter-spacing: 0.25em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}
.hero-slogan {
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  font-weight: 500;
  color: var(--blue);
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
}
.hero-desc {
  font-size: 1rem;
  color: var(--text-3);
  line-height: 1.85;
  max-width: 34rem;
  margin-bottom: 2rem;
}
.hero-features {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  margin-bottom: 2rem;
}
.hero-features li {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.92rem;
  color: var(--text-2);
  font-weight: 500;
}
.hero-features li .tick {
  width: 18px; height: 18px;
  background: var(--blue);
  color: #fff;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  flex-shrink: 0;
}
.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.75rem;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  color: var(--text-4);
  letter-spacing: 0.05em;
}
.hero-meta span { display: inline-flex; align-items: center; gap: 0.4rem; }
.hero-meta .sep { color: var(--border); }

/* Hero product visual */
.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 440px;
}
.product-box {
  position: relative;
  width: 280px;
  height: 380px;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  animation: float-y 5s ease-in-out infinite;
  border: 1px solid var(--border);
}
.product-box .pb-top {
  height: 120px;
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-dark) 100%);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  color: #fff;
}
.product-box .pb-top::after {
  content: '';
  position: absolute;
  bottom: -40px;
  left: -20px;
  right: -20px;
  height: 80px;
  background: #fff;
  border-radius: 50% 50% 0 0;
}
.product-box .pb-curve {
  position: absolute;
  top: 60px;
  left: -20%;
  width: 140%;
  height: 80px;
  background: var(--orange);
  border-radius: 50%;
  opacity: 0.85;
  transform: rotate(-8deg);
}
.product-box .pb-bluehat {
  position: relative;
  z-index: 2;
  width: 56px;
  height: 56px;
  background: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  margin-bottom: 0.5rem;
}
.product-box .pb-bluehat span {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 0.55rem;
  font-weight: 700;
  color: var(--blue);
  text-align: center;
  line-height: 1.1;
}
.product-box .pb-brand {
  position: relative;
  z-index: 2;
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.15em;
}
.product-box .pb-body {
  padding: 2.5rem 1.5rem 1.5rem;
  text-align: center;
  position: relative;
}
.product-box .pb-name {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.1em;
  margin-bottom: 0.3rem;
}
.product-box .pb-sub {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 0.85rem;
  color: var(--orange);
  font-weight: 600;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}
.product-box .pb-tagline {
  font-size: 0.78rem;
  color: var(--text-3);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}
.product-box .pb-badge-row {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
}
.product-box .pb-chip {
  padding: 0.25rem 0.6rem;
  background: var(--blue-light);
  color: var(--blue);
  border-radius: 4px;
  font-size: 0.68rem;
  font-weight: 600;
}
.product-box .pb-chip.orange {
  background: var(--orange-light);
  color: var(--orange);
}
.product-box .pb-bottom {
  position: absolute;
  bottom: 0;
  left: 0; right: 0;
  padding: 0.6rem 1rem;
  background: var(--bg-gray);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.62rem;
  color: var(--text-4);
  letter-spacing: 0.05em;
  text-align: center;
  border-top: 1px solid var(--border);
}

/* Floating cards around product */
.float-card {
  position: absolute;
  background: #fff;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-2);
  border: 1px solid var(--border);
  animation: float-y 5s ease-in-out infinite;
}
.float-card .fc-icon {
  width: 32px; height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}
.float-card.fc1 { top: 8%; left: -10px; animation-delay: 0.5s; }
.float-card.fc1 .fc-icon { background: var(--blue-light); color: var(--blue); }
.float-card.fc2 { bottom: 12%; right: -20px; animation-delay: 1.5s; }
.float-card.fc2 .fc-icon { background: var(--orange-light); color: var(--orange); }
.float-card.fc3 { top: 40%; right: -40px; animation-delay: 1s; }
.float-card.fc3 .fc-icon { background: #e8f7ef; color: var(--green); }

/* Decorative dots */
.deco-dots {
  position: absolute;
  width: 120px;
  height: 120px;
  background-image: radial-gradient(circle, var(--border-strong) 1.5px, transparent 1.5px);
  background-size: 12px 12px;
  opacity: 0.5;
  pointer-events: none;
}
.deco-dots.dd-1 { top: 40px; right: 60px; }
.deco-dots.dd-2 { bottom: 40px; left: 30px; }

/* ============ 数据指标带 ============ */
.metrics-bar {
  background: #fff;
  padding: clamp(2rem, 4vw, 3rem) 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}
.metric-item {
  text-align: center;
  padding: 0.5rem;
  position: relative;
}
.metric-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 15%;
  height: 70%;
  width: 1px;
  background: var(--border);
}
.metric-num {
  font-family: 'Poppins', sans-serif;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1;
  color: var(--blue);
  margin-bottom: 0.4rem;
}
.metric-num .plus { color: var(--orange); font-weight: 600; }
.metric-num .pct { font-size: 0.6em; font-weight: 600; }
.metric-num.orange { color: var(--orange); }
.metric-label {
  font-size: 0.88rem;
  color: var(--text-3);
  font-weight: 500;
}
.metric-label small {
  display: block;
  font-family: 'Poppins', sans-serif;
  font-size: 0.7rem;
  color: var(--text-4);
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-top: 0.2rem;
}

/* ============ 痛点/问题 ============ */
.problem { background: var(--bg-soft); }
.problem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
  margin-bottom: 2.5rem;
}
.problem-text {}
.problem-text h3 {
  font-size: clamp(1.3rem, 2.2vw, 1.7rem);
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 1rem;
  color: var(--text);
}
.problem-text h3 .hl { color: var(--blue); }
.problem-text h3 .hl-orange { color: var(--orange); }
.problem-text p {
  color: var(--text-3);
  font-size: 0.98rem;
  line-height: 1.85;
  margin-bottom: 0.9rem;
}
.problem-text .key-insight {
  margin-top: 1.25rem;
  padding: 1.1rem 1.25rem;
  background: #fff;
  border-left: 3px solid var(--orange);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.95rem;
  color: var(--text-2);
  line-height: 1.8;
  box-shadow: var(--shadow-sm);
}
.problem-text .key-insight strong { color: var(--orange); }

.pain-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.9rem;
}
.pain-card {
  background: #fff;
  padding: 1.25rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: all 0.3s var(--ease);
}
.pain-card:hover {
  border-color: var(--blue);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.pain-icon {
  width: 40px; height: 40px;
  background: var(--blue-light);
  color: var(--blue);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  margin-bottom: 0.85rem;
}
.pain-card:nth-child(even) .pain-icon {
  background: var(--orange-light);
  color: var(--orange);
}
.pain-card h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
  color: var(--text);
}
.pain-card p {
  font-size: 0.85rem;
  color: var(--text-3);
  line-height: 1.65;
}

.data-callout {
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-dark) 100%);
  color: #fff;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border-radius: var(--radius-lg);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2rem;
  align-items: center;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}
.data-callout::before {
  content: '';
  position: absolute;
  right: -60px;
  top: -60px;
  width: 220px;
  height: 220px;
  background: rgba(255,255,255,0.06);
  border-radius: 50%;
}
.dc-big {
  font-family: 'Poppins', sans-serif;
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1;
  position: relative;
  z-index: 1;
}
.dc-big span { font-size: 0.35em; font-weight: 500; display: block; margin-top: 0.3rem; opacity: 0.85; font-family: 'Noto Sans SC', sans-serif; letter-spacing: 0.05em; }
.dc-text { position: relative; z-index: 1; }
.dc-text p {
  font-size: 1rem;
  line-height: 1.8;
  opacity: 0.95;
  margin-bottom: 0.6rem;
}
.dc-text cite {
  font-family: 'Poppins', 'IBM Plex Mono', monospace;
  font-size: 0.75rem;
  opacity: 0.7;
  font-style: normal;
  letter-spacing: 0.05em;
}

/* ============ 核心科技/产品展示 ============ */
.science {}
.science-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: 3rem;
}
.sci-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  position: relative;
  overflow: hidden;
  transition: all 0.3s var(--ease);
}
.sci-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.sci-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
}
.sci-card.tradition::before { background: linear-gradient(90deg, var(--green), #6cc091); }
.sci-card.modern::before { background: linear-gradient(90deg, var(--blue), var(--orange)); }

.sci-card .sci-tag {
  display: inline-block;
  padding: 0.25rem 0.7rem;
  border-radius: 4px;
  font-family: 'Poppins', sans-serif;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.sci-card.tradition .sci-tag { background: #e8f7ef; color: var(--green); }
.sci-card.modern .sci-tag { background: var(--blue-light); color: var(--blue); }

.sci-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.sci-card h3 .sci-char {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border-radius: 8px;
  font-family: 'Noto Serif SC', serif;
  font-size: 1.3rem;
  font-weight: 700;
  flex-shrink: 0;
}
.sci-card.tradition h3 .sci-char { background: #e8f7ef; color: var(--green); }
.sci-card.modern h3 .sci-char { background: var(--blue-light); color: var(--blue); }

.sci-card p {
  font-size: 0.94rem;
  color: var(--text-3);
  line-height: 1.85;
  margin-bottom: 0.85rem;
}
.sci-quote {
  padding: 0.9rem 1rem;
  background: var(--bg-soft);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  color: var(--text-2);
  line-height: 1.75;
  border-left: 3px solid var(--green);
  margin-top: 0.75rem;
}
.sci-card.modern .sci-quote {
  border-left-color: var(--blue);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.8rem;
  color: var(--blue-dark);
  letter-spacing: 0.03em;
  background: var(--blue-light);
}

/* Mechanism flow */
.mechanism {
  background: var(--bg-soft);
  padding: clamp(2rem, 4vw, 3rem);
  border-radius: var(--radius-lg);
  margin-bottom: 2.5rem;
}
.mechanism-title {
  text-align: center;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 2rem;
}
.mech-flow {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
}
.mech-step {
  flex: 1;
  min-width: 180px;
  max-width: 240px;
  text-align: center;
  padding: 1.5rem 1rem;
  background: #fff;
  border-radius: var(--radius);
  position: relative;
  border: 1px solid var(--border);
}
.mech-step-num {
  font-family: 'Poppins', sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--orange);
  margin-bottom: 0.6rem;
}
.mech-step-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.4rem;
}
.mech-step-desc {
  font-size: 0.82rem;
  color: var(--text-3);
  line-height: 1.6;
}
.mech-step.s1 .mech-step-title { color: var(--green); }
.mech-step.s2 .mech-step-title { color: var(--blue); }
.mech-step.s3 .mech-step-title { color: var(--orange); }
.mech-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  color: var(--border-strong);
  font-size: 1.3rem;
  flex-shrink: 0;
}

/* Data stats grid */
.sci-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 1rem;
}
.sci-stat {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.25rem;
  text-align: center;
  transition: all 0.3s var(--ease);
}
.sci-stat:hover {
  border-color: var(--blue);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}
.sci-stat-num {
  font-family: 'Poppins', sans-serif;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  line-height: 1;
  color: var(--blue);
  margin-bottom: 0.5rem;
}
.sci-stat-num .unit {
  font-size: 0.5em;
  font-weight: 600;
  color: var(--orange);
  font-family: 'Noto Sans SC', sans-serif;
}
.sci-stat-num.orange { color: var(--orange); }
.sci-stat-label {
  font-size: 0.85rem;
  color: var(--text-3);
  line-height: 1.5;
}
.sci-stat.mono .sci-stat-num {
  font-family: 'IBM Plex Mono', monospace;
  font-size: clamp(0.75rem, 1.1vw, 0.92rem);
  font-weight: 500;
  color: var(--blue);
  letter-spacing: 0.04em;
  line-height: 1.4;
}

/* ============ 品质保障/信任 ============ */
.quality { background: var(--bg-soft); }
.trust-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}
.trust-card {
  background: #fff;
  padding: 1.75rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  transition: all 0.3s var(--ease);
}
.trust-card:hover {
  border-color: var(--blue);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.trust-icon {
  flex-shrink: 0;
  width: 46px;
  height: 46px;
  background: var(--blue-light);
  color: var(--blue);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
  font-family: 'Noto Sans SC', sans-serif;
}
.trust-card:nth-child(even) .trust-icon {
  background: var(--orange-light);
  color: var(--orange);
}
.trust-card h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
  color: var(--text);
}
.trust-card p {
  font-size: 0.84rem;
  color: var(--text-3);
  line-height: 1.7;
}
.trust-card .ref-code {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  color: var(--blue);
  font-weight: 500;
  letter-spacing: 0.04em;
  margin-top: 0.4rem;
  display: inline-block;
}

.expert-block {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: clamp(2rem, 4vw, 3rem);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.expert-block::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--blue), var(--orange));
}
.eb-quote {
  font-family: 'Noto Serif SC', serif;
  font-size: clamp(1rem, 1.8vw, 1.25rem);
  line-height: 1.9;
  color: var(--text-2);
  margin-bottom: 1.5rem;
  padding-left: 2rem;
  position: relative;
  font-weight: 500;
}
.eb-quote::before {
  content: '"';
  font-family: 'Playfair Display', 'Poppins', serif;
  font-size: 4rem;
  color: var(--blue);
  position: absolute;
  left: 0; top: -1.2rem;
  line-height: 1;
  font-weight: 700;
  opacity: 0.3;
}
.eb-attr {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-left: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
}
.eb-avatar {
  width: 52px; height: 52px;
  background: linear-gradient(135deg, var(--blue-light), var(--blue));
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Noto Serif SC', serif;
  font-size: 1.2rem;
  font-weight: 700;
}
.eb-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
}
.eb-title {
  font-size: 0.8rem;
  color: var(--text-3);
  margin-top: 0.15rem;
}
.eb-mini-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}
.eb-mini {
  padding: 1rem 1.25rem;
  background: var(--bg-soft);
  border-radius: var(--radius);
}
.eb-mini blockquote {
  font-size: 0.9rem;
  color: var(--text-2);
  line-height: 1.75;
  margin-bottom: 0.5rem;
  font-style: italic;
}
.eb-mini cite {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.7rem;
  color: var(--text-4);
  font-style: normal;
  letter-spacing: 0.04em;
  display: block;
}

/* ============ 适用人群 ============ */
.audience {}
.audience-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}
.aud-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 1.4rem;
  transition: all 0.3s var(--ease);
  position: relative;
  overflow: hidden;
}
.aud-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--blue);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease);
}
.aud-card:hover::before { transform: scaleX(1); }
.aud-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--blue-light); }
.aud-num {
  font-family: 'Poppins', sans-serif;
  font-size: 2rem;
  font-weight: 800;
  color: var(--blue-light);
  line-height: 1;
  margin-bottom: 0.85rem;
}
.aud-card:hover .aud-num { color: var(--blue); }
.aud-icon {
  width: 44px; height: 44px;
  background: var(--blue-light);
  color: var(--blue);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 1rem;
}
.aud-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.5rem;
}
.aud-card p {
  font-size: 0.85rem;
  color: var(--text-3);
  line-height: 1.7;
}

.customer-trust {
  background: linear-gradient(135deg, var(--blue-light) 0%, #fff 100%);
  border-radius: var(--radius-lg);
  padding: clamp(2rem, 4vw, 3rem);
  text-align: center;
  border: 1px solid #d6e6f5;
}
.ct-num {
  font-family: 'Poppins', sans-serif;
  font-size: clamp(2.8rem, 6vw, 4.2rem);
  font-weight: 800;
  color: var(--blue);
  line-height: 1;
  margin-bottom: 0.5rem;
}
.ct-num span {
  font-size: 0.4em;
  font-weight: 600;
  color: var(--orange);
}
.ct-label {
  font-size: 1.05rem;
  color: var(--text-3);
  font-weight: 500;
}

/* ============ 服务承诺 ============ */
.services { background: var(--bg-soft); }
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.svc-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  text-align: center;
  border: 1px solid var(--border);
  transition: all 0.3s var(--ease);
}
.svc-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--blue-light);
}
.svc-icon {
  width: 56px; height: 56px;
  margin: 0 auto 1rem;
  background: var(--blue-light);
  color: var(--blue);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
}
.svc-card:nth-child(even) .svc-icon {
  background: var(--orange-light);
  color: var(--orange);
}
.svc-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.5rem;
}
.svc-card p {
  font-size: 0.85rem;
  color: var(--text-3);
  line-height: 1.7;
}

/* ============ 产品规格 ============ */
.specs {}
.specs-wrap { max-width: 820px; margin: 0 auto; }
.spec-table {
  width: 100%;
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.spec-row {
  display: grid;
  grid-template-columns: 160px 1fr;
  border-bottom: 1px solid var(--border);
}
.spec-row:last-child { border-bottom: none; }
.spec-row > div {
  padding: 1rem 1.25rem;
  font-size: 0.92rem;
}
.spec-label {
  background: var(--bg-soft);
  font-weight: 600;
  color: var(--text);
  border-right: 1px solid var(--border);
  display: flex;
  align-items: center;
}
.spec-value { color: var(--text-3); display: flex; align-items: center; }
.spec-value strong { color: var(--blue); font-weight: 700; }
.spec-value .mono {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.82rem;
  color: var(--blue);
  font-weight: 500;
  letter-spacing: 0.04em;
}
.spec-value .warn { color: var(--orange); font-weight: 600; }

.disclaimer-box {
  margin-top: 1.25rem;
  padding: 1rem 1.25rem;
  background: #fff8ed;
  border-left: 3px solid var(--orange);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.85rem;
  color: #8a5a15;
  line-height: 1.7;
}
.disclaimer-box strong { font-weight: 700; }

/* ============ CTA ============ */
.cta-section {
  background: linear-gradient(135deg, var(--blue-dark) 0%, var(--blue) 60%, #2578bc 100%);
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  right: -100px; top: -100px;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
  border-radius: 50%;
}
.cta-section::after {
  content: '';
  position: absolute;
  left: -80px; bottom: -100px;
  width: 320px; height: 320px;
  background: radial-gradient(circle, rgba(212,130,26,0.2) 0%, transparent 70%);
  border-radius: 50%;
}
.cta-inner { position: relative; z-index: 1; }
.cta-eyebrow {
  display: inline-block;
  font-family: 'Poppins', sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  color: rgba(255,255,255,0.7);
  text-transform: uppercase;
  margin-bottom: 1rem;
  padding: 0.3rem 1rem;
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 100px;
}
.cta-section h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  margin-bottom: 1rem;
  line-height: 1.3;
}
.cta-section .cta-sub {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.8);
  max-width: 40rem;
  margin: 0 auto 2.25rem;
  line-height: 1.8;
}
.cta-btns {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}
.cta-phone-big {
  font-family: 'Poppins', sans-serif;
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.05em;
  margin: 0.5rem 0 1.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.75rem;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius);
  backdrop-filter: blur(8px);
}
.cta-phone-big .p-label {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 0.5em;
  font-weight: 500;
  letter-spacing: 0.1em;
  opacity: 0.8;
}
.cta-trust-row {
  display: flex;
  gap: 2rem;
  justify-content: center;
  flex-wrap: wrap;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.15);
}
.cta-trust-item {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.8);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.cta-trust-item::before {
  content: '';
  width: 6px; height: 6px;
  background: var(--orange);
  border-radius: 50%;
}

/* ============ FOOTER ============ */
footer {
  background: #152333;
  color: rgba(255,255,255,0.6);
  padding: 3rem 0 1.5rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 2rem;
}
.footer-brand .fb-name {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.35rem;
}
.footer-brand .fb-en {
  font-family: 'Poppins', sans-serif;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--orange);
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.footer-brand p {
  font-size: 0.85rem;
  line-height: 1.8;
  margin-bottom: 0.4rem;
}
.footer-col h5 {
  font-size: 0.92rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
}
.footer-col p, .footer-col a {
  font-size: 0.85rem;
  line-height: 2;
  display: block;
  color: rgba(255,255,255,0.55);
  transition: color 0.3s;
}
.footer-col a:hover { color: var(--orange); }
.footer-col .big-phone {
  font-family: 'Poppins', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.05em;
  margin: 0.4rem 0;
}

.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.footer-disclaimer {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.45);
  line-height: 1.7;
  padding: 0.85rem 1rem;
  background: rgba(0,0,0,0.2);
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
  border-left: 3px solid var(--orange);
}
.footer-copy {
  font-family: 'Poppins', 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: rgba(255,255,255,0.3);
  text-align: center;
}

/* ============ 响应式 ============ */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .hero-visual { order: -1; min-height: 380px; }
  .product-box { transform: scale(0.9); }
  .float-card.fc3 { display: none; }
  .problem-grid { grid-template-columns: 1fr; }
  .science-grid { grid-template-columns: 1fr; }
  .trust-grid { grid-template-columns: 1fr 1fr; }
  .audience-grid { grid-template-columns: 1fr 1fr; }
  .service-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .data-callout { grid-template-columns: 1fr; gap: 1rem; text-align: center; }
  .eb-mini-grid { grid-template-columns: 1fr; gap: 1rem; }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
  .metric-item:nth-child(2)::after { display: none; }
  .mech-arrow { transform: rotate(90deg); width: auto; height: 20px; }
  .mech-flow { flex-direction: column; align-items: center; }
  .mech-step { max-width: 100%; width: 100%; }
}

@media (max-width: 640px) {
  .topbar-phone span { display: none; }
  .trust-grid { grid-template-columns: 1fr; }
  .audience-grid { grid-template-columns: 1fr; }
  .service-grid { grid-template-columns: 1fr; }
  .pain-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 1.75rem; }
  .spec-row { grid-template-columns: 110px 1fr; }
  .spec-row > div { padding: 0.75rem 0.9rem; font-size: 0.85rem; }
  .float-card.fc1, .float-card.fc2 { display: none; }
  .hero-cta .btn { width: 100%; }
  .cta-btns .btn { width: 100%; }
  .metrics-grid { grid-template-columns: 1fr 1fr; }
  .metric-item::after { display: none !important; }
  .hero-meta { font-size: 0.65rem; }
  .sci-stats { grid-template-columns: 1fr 1fr; }
}