/* =============================================
   恒基瑞康 - 企业官网样式表
   河南恒基瑞康科技有限公司
   ============================================= */

/* ---------- CSS 变量 / 设计令牌 ---------- */
:root {
  /* 品牌色 - 健康绿 + 科技蓝 */
  --color-primary:       #00A86B;
  --color-primary-dark:  #007A4D;
  --color-primary-light: #E6F7F1;
  --color-accent:        #0EA5E9;
  --color-accent-dark:   #0284C7;

  /* 中性色 */
  --color-bg:            #F8FAFB;
  --color-surface:       #FFFFFF;
  --color-border:        #E2E8F0;
  --color-text:          #0F172A;
  --color-text-muted:    #475569;
  --color-text-light:    #94A3B8;

  /* 渐变 */
  --gradient-hero:       linear-gradient(135deg, #003D2B 0%, #006644 40%, #0A7550 100%);
  --gradient-card:       linear-gradient(135deg, rgba(0,168,107,0.08) 0%, rgba(14,165,233,0.06) 100%);
  --gradient-accent:     linear-gradient(90deg, #00A86B, #0EA5E9);

  /* 字体 */
  --font-heading:        'Noto Serif SC', 'STSong', serif;
  --font-body:           'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;

  /* 尺寸 */
  --nav-height:          72px;
  --container-max:       1200px;
  --radius-sm:           6px;
  --radius-md:           12px;
  --radius-lg:           20px;
  --radius-xl:           28px;

  /* 阴影 */
  --shadow-sm:           0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:           0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg:           0 12px 40px rgba(0,0,0,0.12);
  --shadow-green:        0 8px 32px rgba(0,168,107,0.25);

  /* 过渡 */
  --transition-fast:     150ms ease;
  --transition-normal:   300ms ease;
  --transition-slow:     500ms ease;
}

/* ---------- 重置 & 基础 ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  display: block;
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

/* ---------- 通用工具类 ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-top: 12px;
  line-height: 1.8;
  max-width: 560px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-tag::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-green);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(0,168,107,0.35);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.5);
}

.btn-outline:hover {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.8);
}

/* ---------- 导航栏 ---------- */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  transition: all var(--transition-normal);
  background: transparent;
}

#navbar.scrolled {
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--color-border), var(--shadow-sm);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
}

.nav-logo-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.nav-logo-icon svg {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: #fff;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.nav-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.nav-logo-main {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  transition: color var(--transition-fast);
}

.nav-logo-sub {
  font-size: 0.65rem;
  color: rgba(255,255,255,0.7);
  letter-spacing: 0.05em;
  transition: color var(--transition-fast);
}

#navbar.scrolled .nav-logo-main {
  color: var(--color-text);
}

#navbar.scrolled .nav-logo-sub {
  color: var(--color-text-muted);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-menu a {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(255,255,255,0.85);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.nav-menu a:hover {
  color: #fff;
  background: rgba(255,255,255,0.12);
}

#navbar.scrolled .nav-menu a {
  color: var(--color-text-muted);
}

#navbar.scrolled .nav-menu a:hover {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.nav-cta {
  padding: 9px 20px;
  background: var(--color-primary);
  color: #fff !important;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-green);
}

.nav-cta:hover {
  background: var(--color-primary-dark) !important;
  color: #fff !important;
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: all var(--transition-fast);
}

#navbar.scrolled .nav-hamburger span {
  background: var(--color-text);
}

/* ---------- 英雄区 Hero ---------- */
#hero {
  min-height: 100vh;
  background: var(--gradient-hero);
  position: relative;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: calc(var(--nav-height) + 40px) 0 80px;
}

/* 装饰粒子背景 */
#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 80%, rgba(0,168,107,0.18) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(14,165,233,0.15) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(255,255,255,0.03) 0%, transparent 60%);
  pointer-events: none;
}

/* 网格线装饰 */
#hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 100px;
  color: rgba(255,255,255,0.9);
  font-size: 0.82rem;
  font-weight: 500;
  margin-bottom: 24px;
  backdrop-filter: blur(4px);
}

.hero-badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #4ADE80;
  box-shadow: 0 0 8px #4ADE80;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.7; transform: scale(1.3); }
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 4.5vw, 3.5rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 20px;
}

.hero-title-accent {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.72);
  line-height: 1.85;
  margin-bottom: 36px;
  max-width: 500px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 56px;
}

.hero-stat-item {
  text-align: center;
}

.hero-stat-num {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: #fff;
  line-height: 1;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stat-label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.55);
  margin-top: 4px;
}

/* 英雄区右侧视觉 */
.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-card-main {
  width: 340px;
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-xl);
  padding: 32px;
  position: relative;
  z-index: 2;
}

.hero-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.hero-card-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-card-icon-wrap svg {
  width: 26px;
  height: 26px;
  stroke: #fff;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
}

.hero-card-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
}

.hero-card-sub {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.55);
  margin-top: 2px;
}

.hero-product-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.hero-product-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: rgba(255,255,255,0.06);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255,255,255,0.08);
}

.hero-product-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.hero-product-dot.green  { background: #4ADE80; box-shadow: 0 0 8px #4ADE80; }
.hero-product-dot.blue   { background: #38BDF8; box-shadow: 0 0 8px #38BDF8; }
.hero-product-dot.orange { background: #FB923C; box-shadow: 0 0 8px #FB923C; }

.hero-product-name {
  flex: 1;
  font-size: 0.88rem;
  color: rgba(255,255,255,0.85);
  font-weight: 500;
}

.hero-product-tag {
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 100px;
  background: rgba(0,168,107,0.25);
  color: #4ADE80;
  font-weight: 600;
}

/* 浮动装饰卡片 */
.hero-float-card {
  position: absolute;
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: float 4s ease-in-out infinite;
}

.hero-float-card:nth-child(2) { animation-delay: -2s; top: 20px; right: -30px; }
.hero-float-card:nth-child(3) { animation-delay: -1s; bottom: 60px; left: -30px; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-10px); }
}

.hero-float-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-float-icon svg {
  width: 18px;
  height: 18px;
  stroke: #fff;
  stroke-width: 2;
  fill: none;
}

.hero-float-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.hero-float-label {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.55);
}

.hero-float-value {
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
}

/* ---------- 关于我们 ---------- */
#about {
  padding: 100px 0;
  background: var(--color-surface);
}

.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-visual {
  position: relative;
}

.about-img-wrap {
  width: 100%;
  aspect-ratio: 4/3;
  border-radius: var(--radius-xl);
  background: var(--gradient-hero);
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-img-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  opacity: 0.9;
}

.about-img-placeholder svg {
  width: 80px;
  height: 80px;
  stroke: rgba(255,255,255,0.6);
  stroke-width: 1.5;
  fill: none;
}

.about-img-placeholder span {
  color: rgba(255,255,255,0.5);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
}

/* 叠加数据卡 */
.about-badge-card {
  position: absolute;
  bottom: -20px;
  right: -20px;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  display: flex;
  gap: 16px;
  z-index: 2;
}

.about-badge-item {
  text-align: center;
}

.about-badge-num {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.about-badge-desc {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

.about-content .section-subtitle {
  max-width: 100%;
  margin-top: 16px;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 32px;
}

.about-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  transition: all var(--transition-normal);
  cursor: default;
}

.about-feature-item:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
  transform: translateY(-2px);
}

.about-feature-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.about-feature-icon svg {
  width: 20px;
  height: 20px;
  stroke: var(--color-primary);
  stroke-width: 2;
  fill: none;
}

.about-feature-text strong {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
}

.about-feature-text span {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 2px;
  display: block;
}

/* ---------- 专家团队 ---------- */
#experts {
  padding: 100px 0;
  background: var(--color-bg);
  overflow: hidden;
}

.experts-header {
  text-align: center;
  margin-bottom: 60px;
}

.experts-header .section-subtitle {
  max-width: 600px;
  margin: 12px auto 0;
}

.experts-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.expert-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  border: 1px solid var(--color-border);
  transition: all var(--transition-normal);
  cursor: default;
  position: relative;
  overflow: hidden;
}

.expert-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-normal);
}

.expert-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: rgba(0,168,107,0.2);
}

.expert-card:hover::before {
  transform: scaleX(1);
}

.expert-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--gradient-hero);
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 3px solid rgba(0,168,107,0.15);
}

.expert-avatar svg {
  width: 40px;
  height: 40px;
  stroke: rgba(255,255,255,0.7);
  stroke-width: 1.5;
  fill: none;
}

.expert-name {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 4px;
}

.expert-title {
  font-size: 0.8rem;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: 8px;
}

.expert-desc {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ---------- 我们的服务 ---------- */
#services {
  padding: 100px 0;
  background: var(--color-surface);
}

.services-header {
  text-align: center;
  margin-bottom: 64px;
}

.services-header .section-subtitle {
  margin: 12px auto 0;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all var(--transition-normal);
  cursor: default;
  position: relative;
  overflow: hidden;
}

.service-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-card);
  opacity: 0;
  transition: opacity var(--transition-normal);
  pointer-events: none;
}

.service-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg), 0 0 0 1px var(--color-primary);
  transform: translateY(-4px);
}

.service-card:hover::after {
  opacity: 1;
}

.service-icon-wrap {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  transition: all var(--transition-normal);
  position: relative;
  z-index: 1;
}

.service-card:hover .service-icon-wrap {
  background: var(--color-primary);
}

.service-icon-wrap svg {
  width: 28px;
  height: 28px;
  stroke: var(--color-primary);
  stroke-width: 2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: stroke var(--transition-normal);
}

.service-card:hover .service-icon-wrap svg {
  stroke: #fff;
}

.service-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 10px;
  position: relative;
  z-index: 1;
}

.service-desc {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  position: relative;
  z-index: 1;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 18px;
  position: relative;
  z-index: 1;
}

.service-tag {
  padding: 3px 10px;
  border-radius: 100px;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-size: 0.75rem;
  font-weight: 500;
}

/* ---------- 产品展示 ---------- */
#products {
  padding: 100px 0;
  background: var(--color-bg);
}

.products-header {
  text-align: center;
  margin-bottom: 64px;
}

.products-header .section-subtitle {
  margin: 12px auto 0;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.product-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: all var(--transition-normal);
  cursor: default;
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.product-card-visual {
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.product-card:nth-child(1) .product-card-visual { background: linear-gradient(135deg, #0E4A3F 0%, #1A7A5E 100%); }
.product-card:nth-child(2) .product-card-visual { background: linear-gradient(135deg, #1A2E6B 0%, #2E4B9E 100%); }

.product-card-visual-icon {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.product-main-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
  border: 2px solid rgba(255,255,255,0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
}

.product-main-icon svg {
  width: 38px;
  height: 38px;
  stroke: #fff;
  stroke-width: 1.8;
  fill: none;
}

.product-name-badge {
  padding: 5px 16px;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 100px;
  color: #fff;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.05em;
}

/* 产品卡片装饰圆 */
.product-card-visual::before,
.product-card-visual::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.04);
}

.product-card-visual::before { width: 200px; height: 200px; top: -80px; right: -60px; }
.product-card-visual::after  { width: 120px; height: 120px; bottom: -50px; left: -30px; }

.product-card-body {
  padding: 28px;
  flex: 1;
}

.product-card-name {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.product-card-desc {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: 20px;
}

.product-benefits {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.product-benefit-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.product-benefit-item::before {
  content: '';
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-primary-light);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none'%3E%3Cpath d='M3 8l3.5 3.5L13 5' stroke='%2300A86B' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  flex-shrink: 0;
}

/* ---------- 联系我们 ---------- */
#contact {
  padding: 100px 0;
  background: var(--color-surface);
}

.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 80px;
  align-items: start;
}

.contact-info .section-subtitle {
  max-width: 100%;
  margin-top: 16px;
}

.contact-items {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 36px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  transition: all var(--transition-normal);
  cursor: default;
}

.contact-item:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.contact-item-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-item-icon svg {
  width: 20px;
  height: 20px;
  stroke: var(--color-primary);
  stroke-width: 2;
  fill: none;
}

.contact-item-label {
  font-size: 0.78rem;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 3px;
}

.contact-item-value {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-text);
}

/* 联系表单 */
.contact-form-wrap {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 40px;
}

.form-title {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 6px;
}

.form-subtitle {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 28px;
}

.form-group {
  margin-bottom: 18px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: 7px;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--color-text);
  background: var(--color-surface);
  transition: all var(--transition-fast);
  outline: none;
  resize: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-light);
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-textarea { height: 110px; line-height: 1.6; }

.form-submit {
  width: 100%;
  padding: 13px;
  font-size: 0.95rem;
}

/* ---------- 页脚 ---------- */
#footer {
  background: #0A1628;
  color: rgba(255,255,255,0.6);
  padding: 64px 0 0;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-brand .nav-logo { margin-bottom: 16px; }
.footer-brand .nav-logo-main { color: #fff; }
.footer-brand .nav-logo-sub { color: rgba(255,255,255,0.4); }

.footer-brand-desc {
  font-size: 0.85rem;
  line-height: 1.8;
  margin-bottom: 24px;
  color: rgba(255,255,255,0.45);
}

.footer-col-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: rgba(255,255,255,0.85);
  margin-bottom: 16px;
  letter-spacing: 0.03em;
}

.footer-col-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col-links a {
  font-size: 0.83rem;
  color: rgba(255,255,255,0.45);
  transition: color var(--transition-fast);
  cursor: pointer;
}

.footer-col-links a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom-left {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.3);
}

.footer-icp {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.3);
  display: flex;
  align-items: center;
  gap: 6px;
}

.footer-icp a {
  color: rgba(255,255,255,0.4);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-icp a:hover {
  color: var(--color-primary);
}

/* ---------- 滚动动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal.revealed {
  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; }

/* ---------- 回到顶部按钮 ---------- */
#back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-green);
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--transition-normal);
  z-index: 900;
}

#back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
}

#back-to-top:hover {
  background: var(--color-primary-dark);
  transform: translateY(-3px);
}

#back-to-top svg {
  width: 20px;
  height: 20px;
  stroke: #fff;
  stroke-width: 2.5;
  fill: none;
}

/* ---------- 移动端响应式 ---------- */
@media (max-width: 1024px) {
  .experts-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-menu { display: none; }
  .nav-hamburger { display: flex; }

  .nav-menu.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(10, 22, 40, 0.98);
    backdrop-filter: blur(12px);
    padding: 16px;
    gap: 4px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
  }

  #navbar.scrolled .nav-menu.open { background: rgba(255,255,255,0.98); }
  #navbar.scrolled .nav-menu.open a { color: var(--color-text-muted); }
  #navbar.scrolled .nav-menu.open a:hover { color: var(--color-primary); }

  .nav-menu.open a {
    padding: 12px 16px;
    color: rgba(255,255,255,0.85);
    width: 100%;
    border-radius: var(--radius-sm);
  }

  .hero-inner        { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual       { display: none; }
  .hero-stats        { gap: 20px; flex-wrap: wrap; }

  .about-inner       { grid-template-columns: 1fr; }
  .about-badge-card  { position: static; margin-top: 16px; justify-content: center; }

  .services-grid     { grid-template-columns: 1fr; }
  .products-grid     { grid-template-columns: 1fr; }
  .experts-grid      { grid-template-columns: 1fr 1fr; }

  .contact-inner     { grid-template-columns: 1fr; gap: 40px; }
  .form-row          { grid-template-columns: 1fr; }

  .footer-inner      { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom     { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .experts-grid { grid-template-columns: 1fr; }
  .about-features { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
}