/* =========================================
   八元软件官网 – Global Stylesheet
   ========================================= */

/* ---- CSS 变量 ---- */
:root {
  --primary:    #e84c3d;
  --primary-dk: #d43d2e;
  --primary-lt: #f06050;
  --accent:     #ff6b35;
  --dark:       #3d1a16;
  --dark2:      #5a2820;
  --gray:       #666666;
  --light:      #f8f8f8;
  --white:      #ffffff;
  --border:     #e5e5e5;
  --radius:     12px;
  --shadow-sm:  0 2px 8px rgba(232,76,61,.08);
  --shadow-md:  0 8px 32px rgba(232,76,61,.14);
  --shadow-lg:  0 20px 60px rgba(232,76,61,.18);
  --font:       'Noto Sans SC', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --transition: .3s cubic-bezier(.4,0,.2,1);
}

/* ---- 重置 ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  color: var(--dark);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; }

/* ---- 容器 ---- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- 通用 section ---- */
.section { padding: 100px 0; }
.section-header { text-align: center; margin-bottom: 64px; }
.section-tag {
  display: inline-block;
  font-size: 1rem;
  font-weight: 700;
  font-weight: 700;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--primary);
  background: rgba(232,76,61,.08);
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 16px;
}
.section-title { font-size: clamp(1.75rem, 3vw, 2.5rem); font-weight: 700; line-height: 1.25; margin-bottom: 16px; }
.section-desc { font-size: 1.05rem; color: var(--gray); }

/* ---- 按钮 ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 8px;
  font-size: .95rem;
  font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
}
.btn-primary {
  background: var(--primary);
  color: var(--white);
}
.btn-primary:hover { background: var(--primary-dk); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-outline {
  border: 2px solid rgba(255,255,255,.5);
  color: var(--white);
}
.btn-outline:hover { background: rgba(255,255,255,.12); border-color: var(--white); transform: translateY(-2px); }
.btn-outline-dark {
  border: 2px solid var(--primary);
  color: var(--primary);
  background: transparent;
}
.btn-outline-dark:hover { background: var(--primary); color: var(--white); transform: translateY(-2px); }
.btn-white { background: var(--white); color: var(--primary); }
.btn-white:hover { background: #fdecea; transform: translateY(-2px); }

/* =========================================
   导航栏
   ========================================= */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 18px 0;
  transition: background var(--transition), box-shadow var(--transition), padding var(--transition);
}
.navbar.scrolled {
  background: rgba(255,255,255,.97);
  backdrop-filter: blur(12px);
  box-shadow: 0 2px 20px rgba(0,0,0,.08);
  padding: 12px 0;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 4px;
  font-weight: 800;
  font-size: 1.4rem;
}
.logo-8 {
  color: var(--primary);
  font-size: 1.8rem;
  line-height: 1;
}
.logo-text { color: var(--dark); }
.logo-sub {
  font-size: .75rem;
  font-weight: 400;
  color: var(--gray);
  margin-left: 6px;
  border-left: 1px solid var(--border);
  padding-left: 8px;
  line-height: 1;
}
.navbar:not(.scrolled) .logo-text,
.navbar:not(.scrolled) .logo-sub { color: rgba(255,255,255,.9); }

/* Logo 图片 */
.logo-img {
  height: 40px;
  width: auto;
  display: block;
  object-fit: contain;
}
.logo-img-footer {
  height: 36px;
  /* 页脚深色背景，图片如带深色元素则用亮化处理 */
  filter: brightness(0) invert(1);
  opacity: .9;
}
.navbar:not(.scrolled) .logo-8 { color: #f09090; }
.navbar:not(.scrolled) .logo-img { filter: brightness(0) invert(1); }
.navbar.scrolled .logo-img { filter: none; }

.nav-links { display: flex; align-items: center; gap: 36px; }
.nav-links a {
  font-size: .9rem;
  font-weight: 500;
  position: relative;
  transition: color var(--transition);
}
.navbar:not(.scrolled) .nav-links a { color: rgba(255,255,255,.85); }
.navbar.scrolled .nav-links a { color: var(--dark); }
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0;
  width: 0; height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: width var(--transition);
}
.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }
.navbar:not(.scrolled) .nav-links a::after { background: var(--white); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 6px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--white); border-radius: 2px; transition: all var(--transition); }
.navbar.scrolled .nav-toggle span { background: var(--dark); }

/* =========================================
   Hero
   ========================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #c73829 0%, #e84c3d 55%, #f06050 100%);
  z-index: 0;
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.hero-content {
  position: relative;
  z-index: 1;
  padding: 120px 24px 80px;
  max-width: 760px;
}
.hero-badge {
  display: inline-block;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: rgba(255,255,255,.7);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 20px;
  padding: 6px 16px;
  margin-bottom: 28px;
}
.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1.15;
  margin-bottom: 24px;
}
.hero-title .accent {
  background: linear-gradient(90deg, #f09090, #f5c0b8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 1.1rem;
  color: rgba(255,255,255,.75);
  margin-bottom: 40px;
  line-height: 1.9;
}
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-scroll-hint {
  position: absolute;
  bottom: 40px; left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,.5);
  font-size: .8rem;
  animation: bounce 2s infinite;
}
@keyframes bounce {
  0%,100% { transform: translateX(-50%) translateY(0); }
  50%      { transform: translateX(-50%) translateY(8px); }
}

/* =========================================
   核心优势
   ========================================= */
.features-section { background: var(--white); }
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.feature-card {
  padding: 36px 28px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--white);
  transition: all var(--transition);
  cursor: default;
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}
.feature-icon {
  width: 56px; height: 56px;
  background: rgba(232,76,61,.08);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--primary);
  transition: background var(--transition);
}
.feature-icon svg { width: 28px; height: 28px; }
.feature-card:hover .feature-icon { background: var(--primary); color: var(--white); }
.feature-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 10px; }
.feature-card p { font-size: .9rem; color: var(--gray); line-height: 1.8; }

/* =========================================
   数字成就
   ========================================= */
.stats-section {
  background: var(--primary);
  padding: 72px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  text-align: center;
}
.stat-item { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.stat-num {
  font-size: 3rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1;
}
.stat-num sup { font-size: 1.4rem; }
.stat-label { font-size: .85rem; color: rgba(255,255,255,.7); font-weight: 500; }

/* =========================================
   服务板块
   ========================================= */
.services-section { background: var(--light); }
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  display: flex;
  flex-direction: column;
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px 28px;
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}
.service-num {
  font-size: 2.5rem;
  font-weight: 800;
  color: rgba(232,76,61,.1);
  line-height: 1;
  margin-bottom: 16px;
  transition: color var(--transition);
}
.service-card:hover .service-num { color: rgba(232,76,61,.2); }
.service-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 10px; }
.service-card p { font-size: .88rem; color: var(--gray); line-height: 1.8; flex: 1; margin-bottom: 20px; }
.service-more {
  font-size: .85rem;
  font-weight: 600;
  color: var(--primary);
  transition: gap var(--transition);
}
.service-card:hover .service-more { letter-spacing: .05em; }

/* =========================================
   技术领域
   ========================================= */
.tech-section { background: var(--white); }
.tech-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.tech-text .section-tag { display: inline-block; margin-bottom: 16px; }
.tech-text h2 { font-size: clamp(1.75rem, 3vw, 2.4rem); font-weight: 800; margin-bottom: 20px; line-height: 1.25; }
.tech-text p { color: var(--gray); margin-bottom: 28px; line-height: 1.9; }
.tech-list { margin-bottom: 36px; display: flex; flex-direction: column; gap: 12px; }
.tech-list li { display: flex; align-items: center; gap: 10px; font-size: .95rem; }
.check { display: inline-flex; align-items: center; justify-content: center; width: 22px; height: 22px; background: rgba(232,76,61,.1); color: var(--primary); border-radius: 50%; font-size: .75rem; font-weight: 700; flex-shrink: 0; }

/* 技术圆形可视化 */
.tech-visual { display: flex; justify-content: center; align-items: center; }
.tech-circle-wrap {
  position: relative;
  width: 380px; height: 380px;
}
.tech-center {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 100px; height: 100px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-weight: 800;
  font-size: 1.1rem;
  box-shadow: var(--shadow-md);
  z-index: 2;
}
.tech-circle {
  position: absolute;
  width: 80px; height: 80px;
  border-radius: 50%;
  background: var(--white);
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .75rem;
  font-weight: 600;
  color: var(--dark);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  cursor: default;
}
.tech-circle:hover { border-color: var(--primary); color: var(--primary); transform: scale(1.1); box-shadow: var(--shadow-md); }
/* 6个气泡均匀分布（每60°），半径约140px，容器380px，中心190px */
.c1 { top: 10px;   left: 50%; transform: translateX(-50%); }           /* 90° 正上 */
.c2 { top: 25%;    right: 8px; }                                        /* 30° 右上 */
.c3 { bottom: 25%; right: 8px; }                                        /* -30° 右下 */
.c4 { bottom: 10px; left: 50%; transform: translateX(-50%); }          /* -90° 正下 */
.c5 { bottom: 25%; left: 8px; }                                         /* -150° 左下 */
.c6 { top: 25%;    left: 8px; }                                         /* 150° 左上 */

/* orbit ring */
.tech-circle-wrap::before,
.tech-circle-wrap::after {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  border: 1px dashed rgba(232,76,61,.12);
}
.tech-circle-wrap::before { width: 280px; height: 280px; }
.tech-circle-wrap::after  { width: 360px; height: 360px; }

/* =========================================
   产品展示
   ========================================= */
.products-section { background: var(--light); }
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}
.product-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px 24px;
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.product-icon {
  width: 52px; height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.product-icon svg { width: 28px; height: 28px; }
.pi-blue   { background: #fdecea; color: var(--primary); }
.pi-green  { background: #e6f7ee; color: #1a9a4f; }
.pi-orange { background: #fff3eb; color: #e06b1a; }
.pi-purple { background: #f0eaff; color: #7c3aed; }
.pi-red    { background: #ffebe9; color: #dc2626; }
.pi-teal   { background: #e6f9f8; color: #0d9488; }
.product-card h4 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.product-card p  { font-size: .85rem; color: var(--gray); line-height: 1.8; margin-bottom: 14px; }
.product-tag {
  display: inline-block;
  font-size: .72rem;
  font-weight: 600;
  color: var(--gray);
  background: var(--light);
  border-radius: 4px;
  padding: 2px 10px;
}
.products-cta { text-align: center; }

/* =========================================
   关于我们
   ========================================= */
.about-section { background: var(--white); }
.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.about-visual { display: flex; flex-direction: column; gap: 28px; }
.about-quote-block {
  background: var(--primary);
  border-radius: 16px;
  padding: 40px;
  color: var(--white);
  position: relative;
}
.about-quote-block::before {
  content: '"';
  position: absolute;
  top: 16px; left: 24px;
  font-size: 5rem;
  line-height: 1;
  color: rgba(255,255,255,.1);
  font-family: Georgia, serif;
}
.quote-text { font-size: 1.05rem; line-height: 2; color: rgba(255,255,255,.85); margin-bottom: 16px; }
.quote-source { font-size: .85rem; color: rgba(255,255,255,.5); font-style: italic; }
.about-established {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--light);
  border-radius: 12px;
  padding: 24px 32px;
}
.est-year { font-size: 3rem; font-weight: 800; color: var(--primary); line-height: 1; }
.est-label { font-size: .9rem; color: var(--gray); }
.about-text h2 { font-size: clamp(1.75rem, 3vw, 2.4rem); font-weight: 800; margin-bottom: 16px; margin-top: 12px; }
.about-lead { font-size: 1.05rem; font-weight: 500; margin-bottom: 16px; color: var(--dark); }
.about-text p  { color: var(--gray); margin-bottom: 16px; line-height: 1.9; }
.about-text .btn { margin-top: 12px; }

/* =========================================
   CTA
   ========================================= */
.cta-section {
  background: var(--primary);
  padding: 100px 0;
  text-align: center;
}
.cta-inner h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); color: var(--white); font-weight: 800; margin-bottom: 20px; }
.cta-inner p  { font-size: 1.1rem; color: rgba(255,255,255,.75); margin-bottom: 40px; }

/* =========================================
   页脚
   ========================================= */
.footer { background: var(--dark); color: rgba(255,255,255,.75); padding: 72px 0 0; }
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 64px;
}
.logo-footer .logo-8  { color: var(--primary); }
.logo-footer .logo-text { color: var(--white); }
.footer-brand p { font-size: .88rem; line-height: 1.8; margin-top: 16px; color: rgba(255,255,255,.55); }
.footer-addr { font-size: .82rem; margin-top: 4px; }
.footer-links h4, .footer-contact h4 { font-size: .9rem; font-weight: 700; color: var(--white); margin-bottom: 20px; }
.footer-links a {
  display: block;
  font-size: .85rem;
  color: rgba(255,255,255,.55);
  margin-bottom: 10px;
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--white); }
.footer-contact p { font-size: .85rem; margin-bottom: 10px; }
.footer-contact a { color: rgba(255,255,255,.6); transition: color var(--transition); }
.footer-contact a:hover { color: var(--white); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 24px 0;
}
.footer-bottom .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: .82rem;
  color: rgba(255,255,255,.35);
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom a { color: rgba(255,255,255,.4); transition: color var(--transition); }
.footer-bottom a:hover { color: rgba(255,255,255,.7); }

/* =========================================
   Services Page
   ========================================= */
.page-hero {
  padding: 160px 0 100px;
  background: var(--primary);
  text-align: center;
  color: var(--white);
}
.page-hero h1 { font-size: clamp(2rem, 4vw, 3.2rem); font-weight: 800; margin-bottom: 16px; }
.page-hero p  { font-size: 1.1rem; color: rgba(255,255,255,.7); }

.service-detail-grid { display: flex; flex-direction: column; gap: 80px; }
.service-detail-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.service-detail-item:nth-child(even) .sd-text { order: 2; }
.service-detail-item:nth-child(even) .sd-visual { order: 1; }
.sd-icon {
  width: 72px; height: 72px;
  background: rgba(232,76,61,.1);
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--primary);
}
.sd-icon svg { width: 36px; height: 36px; }
.sd-text h2 { font-size: 1.8rem; font-weight: 800; margin-bottom: 16px; }
.sd-text p  { color: var(--gray); line-height: 1.9; margin-bottom: 20px; }
.sd-list { display: flex; flex-direction: column; gap: 10px; }
.sd-list li { display: flex; align-items: flex-start; gap: 10px; font-size: .9rem; color: var(--gray); }
.sd-visual {
  background: var(--light);
  border-radius: 20px;
  height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.sd-visual-inner {
  width: 80%;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.sd-bar { height: 8px; border-radius: 4px; background: var(--primary); opacity: .15; }
.sd-bar:nth-child(2) { width: 80%; opacity: .25; }
.sd-bar:nth-child(3) { width: 60%; opacity: .35; }

/* =========================================
   About Page
   ========================================= */
.timeline { position: relative; padding: 0 0 0 40px; }
.timeline::before { content: ''; position: absolute; left: 0; top: 8px; bottom: 0; width: 2px; background: var(--border); }
.tl-item { position: relative; margin-bottom: 40px; }
.tl-item::before {
  content: '';
  position: absolute;
  left: -44px; top: 8px;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 0 3px rgba(232,76,61,.2);
}
.tl-year { font-size: .8rem; font-weight: 700; color: var(--primary); margin-bottom: 6px; }
.tl-desc { font-size: .92rem; color: var(--gray); line-height: 1.8; }

/* =========================================
   Contact Page
   ========================================= */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
.contact-info { display: flex; flex-direction: column; gap: 28px; }
.contact-item { display: flex; gap: 16px; align-items: flex-start; }
.contact-item-icon {
  width: 48px; height: 48px;
  background: rgba(232,76,61,.1);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  flex-shrink: 0;
}
.contact-item-icon svg { width: 22px; height: 22px; }
.contact-item h4 { font-weight: 700; margin-bottom: 4px; }
.contact-item p  { font-size: .9rem; color: var(--gray); }
.contact-form { background: var(--white); border: 1px solid var(--border); border-radius: 16px; padding: 40px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: .88rem; font-weight: 600; margin-bottom: 6px; }
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: var(--font);
  font-size: .9rem;
  color: var(--dark);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(232,76,61,.12);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-submit .btn { width: 100%; justify-content: center; padding: 14px; }

/* =========================================
   Products Page
   ========================================= */
.products-page-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.product-page-card {
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: all var(--transition);
}
.product-page-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.pp-card-header {
  padding: 36px 28px 24px;
  background: var(--light);
}
.pp-card-body { padding: 24px 28px; }
.pp-card-body h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 10px; }
.pp-card-body p  { font-size: .85rem; color: var(--gray); line-height: 1.8; }

/* =========================================
   响应式
   ========================================= */
@media (max-width: 1024px) {
  .features-grid,
  .services-grid,
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .tech-inner,
  .about-inner { grid-template-columns: 1fr; gap: 40px; }
  .tech-visual { order: -1; }
  .contact-grid { grid-template-columns: 1fr; }
  .service-detail-item { grid-template-columns: 1fr; }
  .service-detail-item:nth-child(even) .sd-text { order: unset; }
  .service-detail-item:nth-child(even) .sd-visual { order: unset; }
}

@media (max-width: 768px) {
  .section { padding: 72px 0; }
  .features-grid,
  .services-grid,
  .products-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .nav-links { display: none; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; background: rgba(255,255,255,.97); backdrop-filter: blur(12px); padding: 20px 24px; gap: 16px; box-shadow: 0 8px 20px rgba(0,0,0,.1); }
  .nav-links.open { display: flex; }
  .nav-links a { color: var(--dark) !important; }
  .nav-toggle { display: flex; }
  .hero-content { padding-top: 100px; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .tech-circle-wrap { width: 280px; height: 280px; }
  .tech-center { width: 70px; height: 70px; font-size: .9rem; }
  .tech-circle { width: 60px; height: 60px; font-size: .65rem; }
  .tech-circle-wrap::before { width: 200px; height: 200px; }
  .tech-circle-wrap::after  { width: 265px; height: 265px; }
  .form-row { grid-template-columns: 1fr; }
  .products-page-grid { grid-template-columns: 1fr; }
}