* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  scroll-behavior: smooth;
}
:root {
  --primary: #165DFF;
  --secondary: #7B61FF;
  --third: #00CFFB;
  --primary-light: #4080FF;
  --bg-dark: #0A0E17;
  --bg-card: #141925;
  --text: #E5E9F2;
  --text-secondary: #86909C;
  --border: #252F48;
}
body {
  font-family: "Microsoft YaHei", sans-serif;
  background: var(--bg-dark);
  color: var(--text);
  line-height: 1.8;
  overflow-x: hidden;
}
a {
  text-decoration: none;
  color: inherit;
}
img {
  max-width: 100%;
  display: block;
  loading: lazy;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}
.section-title {
  text-align: center;
  font-size: 34px;
  margin-bottom: 55px;
  line-height: 1.4;
  position: relative;
}
.section-title span {
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
}
.section-desc {
  text-align: center;
  color: var(--text-secondary);
  max-width: 850px;
  margin: -40px auto 50px;
  font-size: 15px;
}
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 6px;
  font-weight: 500;
  transition: all 0.3s;
  cursor: pointer;
  border: none;
  font-size: 15px;
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}
.btn:active {
  transform: scale(0.97);
}
.btn-primary {
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  color: #fff;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(123,97,255,0.3);
}
.btn-outline {
  border: 1px solid var(--border);
  color: var(--text);
  background: transparent;
}
.btn-outline:hover {
  border-color: var(--secondary);
  color: var(--secondary);
}

/* 面包屑 */
.breadcrumb {
  text-align: center;
  padding: 90px 0 15px;
  color: var(--text-secondary);
  font-size: 14px;
}
.breadcrumb a {
  color: var(--text-secondary);
}
.breadcrumb a:hover {
  color: var(--primary);
}

/* 图标 */
.icon {
  width: 50px;
  height: 50px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgba(22,93,255,0.1);
  transition: 0.3s;
}
.icon img {
  width: 100px;
  height: 100px;
  object-fit: contain;
  transition: 0.3s;
}
.defense-item:hover .icon,
.prod-card:hover .icon,
.adv-card:hover .icon {
  background: linear-gradient(90deg, var(--primary), var(--secondary));
}
.defense-item:hover .icon img,
.prod-card:hover .icon img,
.adv-card:hover .icon img {
  filter: brightness(0) saturate(100%) invert(100%) sepia(0%) saturate(0%) hue-rotate(0deg) brightness(100%) contrast(100%);
  transform: scale(1.1);
}

/* 导航 */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(20,25,37,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 999;
}
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 78px;
}
.logo {
  font-size: 22px;
  font-weight: bold;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  white-space: nowrap;
}
.nav-menu {
  display: flex;
  gap: 38px;
  list-style: none;
}
.nav-menu a {
  color: var(--text-secondary);
  transition: 0.3s;
  font-size: 15px;
  position: relative;
  white-space: nowrap;
}
.nav-menu a:hover {
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* 汉堡菜单 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
}
.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--text);
  transition: 0.3s;
}
.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translateY(10px);
}
.hamburger.active span:nth-child(2) {
  opacity: 0;
}
.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translateY(-10px);
}
.mobile-menu {
  position: fixed;
  top: 78px;
  left: 0;
  width: 100%;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  display: none;
  flex-direction: column;
  padding: 20px;
  z-index: 99;
}
.mobile-menu a {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}
.mobile-menu a:last-child {
  border-bottom: none;
}

/* 首屏 */
.hero {
  padding: 120px 0 80px;
  text-align: center;
  background: radial-gradient(circle at 50% 30%, rgba(123,97,255,0.15), transparent 70%), url(https://www.gffwq.com/static/gffwq/images/bg.jpg) center top / cover no-repeat;
  background-blend-mode: overlay;
  position: relative;
}
.hero::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: rgba(10,14,23,0.6);
  z-index: 0;
}
.hero .container {
  position: relative;
  z-index: 1;
}
.hero h1 {
  font-size: 50px;
  margin-bottom: 22px;
  max-width: 880px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.3;
  padding-top: 150px;
}
.hero h1 span {
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 780px;
  margin: 0 auto 40px;
}
.hero-btns {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  padding: 100px;
}

/* 防护能力 */
.defense {
  padding: 80px 0;
  background: var(--bg-card);
}
.defense-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}
.defense-item {
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 40px 28px;
  text-align: center;
  transition: 0.3s;
  position: relative;
}
.defense-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transform: scaleX(0);
  transition: 0.3s;
}
.defense-item:hover::before {
  transform: scaleX(1);
}
.defense-item:hover {
  border-color: var(--secondary);
  transform: translateY(-6px);
  box-shadow: 0 8px 30px rgba(123,97,255,0.15);
}
.defense-item h3 {
  margin: 16px 0 10px;
  font-size: 18px;
}
.defense-item p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
}

/* 产品 */
.products {
  padding: 80px 0;
}
.prod-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.prod-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 45px 32px;
  transition: 0.3s;
  position: relative;
}
.prod-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--third));
  transform: scaleX(0);
  transition: 0.3s;
}
.prod-card:hover::before {
  transform: scaleX(1);
}
.prod-card:hover {
  border-color: var(--third);
  transform: translateY(-8px);
  box-shadow: 0 10px 35px rgba(0,207,255,0.15);
}
.prod-card h3 {
  font-size: 22px;
  margin-bottom: 14px;
}
.prod-card p {
  color: var(--text-secondary);
  font-size: 15px;
  margin-bottom: 26px;
  min-height: 50px;
}
.prod-card ul {
  list-style: none;
  margin-bottom: 32px;
}
.prod-card li {
  padding: 8px 0;
  color: var(--text-secondary);
  font-size: 14px;
  position: relative;
  padding-left: 18px;
}
.prod-card li::before {
  content: "✓";
  background: linear-gradient(90deg, var(--primary), var(--third));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  position: absolute;
  left: 0;
}
.prod-card .btn {
  width: 100%;
  text-align: center;
}

/* 机房 */
.rooms {
  padding: 80px 0;
  background: var(--bg-card);
}
.room-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  justify-content: center;
}
.room-tag {
  padding: 18px 34px;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 18px;
  transition: 0.3s;
  display: flex;
  align-items: center;
  gap: 8px;
}
.room-tag::before {
  content: "🚩";
}
.room-tag:hover {
  border-color: var(--third);
  color: var(--third);
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(0,207,255,0.15);
}

/* 优势 */
.advantages {
  padding: 80px 0;
}
.adv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}
.adv-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 40px 32px;
  transition: 0.3s;
  position: relative;
}
.adv-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--secondary), var(--third));
  transform: scaleX(0);
  transition: 0.3s;
}
.adv-card:hover::before {
  transform: scaleX(1);
}
.adv-card:hover {
  border-color: var(--secondary);
  transform: translateY(-6px);
  box-shadow: 0 8px 25px rgba(123,97,255,0.15);
}
.adv-card h3 {
  margin-bottom: 14px;
  font-size: 20px;
}
.adv-card p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.8;
}

/* 客户案例 */
.cases {
  padding: 80px 0;
  background: var(--bg-card);
}
.case-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.case-item {
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 30px;
  text-align: center;
  transition: 0.3s;
}
.case-item:hover {
  border-color: var(--third);
  transform: scale(1.05);
  box-shadow: 0 5px 20px rgba(0,207,255,0.15);
}
.case-item h4 {
  margin-top: 14px;
  font-size: 16px;
  color: var(--text);
}

/* 图表 */
.chart-section {
  padding: 80px 0;
  background: var(--bg-dark);
}
.chart-wrap {
  max-width: 900px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 40px;
}
.chart-title {
  text-align: center;
  font-size: 20px;
  margin-bottom: 30px;
}
.chart-img {
  width: 100%;
  height: auto;
  border-radius: 8px;
}

/* 套餐 */
.packages {
  padding: 80px 0;
}
.pack-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.pack-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 50px 35px;
  transition: 0.3s;
  position: relative;
}
.pack-card.hot {
  border-color: var(--secondary);
  box-shadow: 0 0 30px rgba(123,97,255,0.2);
}
.pack-card:hover {
  border-color: var(--secondary);
  transform: translateY(-8px);
  box-shadow: 0 10px 30px rgba(123,97,255,0.15);
}
.pack-title {
  font-size: 22px;
  margin-bottom: 12px;
}
.price {
  font-size: 38px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: bold;
  margin: 25px 0;
}
.pack-card ul {
  list-style: none;
  margin-bottom: 40px;
}
.pack-card li {
  padding: 10px 0;
  color: var(--text-secondary);
  font-size: 15px;
  padding-left: 20px;
  position: relative;
}
.pack-card li::before {
  content: "✓";
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  position: absolute;
  left: 0;
}
.pack-card .btn {
  width: 100%;
  text-align: center;
}

/* FAQ */
.faq {
  padding: 80px 0;
  background: var(--bg-card);
}
.faq-list {
  max-width: 900px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}
.faq-q {
  padding: 24px 0;
  font-weight: 500;
  font-size: 17px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: 0.3s;
}
.faq-q:hover {
  color: var(--secondary);
}
.faq-q::after {
  content: "+";
  font-size: 22px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  transition: 0.3s;
  flex-shrink: 0;
}
.faq-q.active::after {
  transform: rotate(45deg);
}
.faq-a {
  max-height: 0;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.8;
  transition: max-height 0.4s ease;
}
.faq-a.show {
  max-height: 300px;
  padding-bottom: 20px;
}

/* 页脚 */
.footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: 60px 0 35px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 14px;
}
.footer-links {
  display: flex;
  justify-content: center;
  gap: 28px;
  margin-bottom: 25px;
  flex-wrap: wrap;
}
.footer-links a {
  color: var(--text-secondary);
  transition: 0.3s;
}
.footer-links a:hover {
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.contact-info {
  margin-bottom: 15px;
  color: var(--text);
  font-weight: 500;
}
.footer-keywords {
  margin-top: 15px;
  line-height: 2;
}
.footer-beian {
  margin-top: 10px;
  color: var(--text-secondary);
}

/* 响应式 */
@media (max-width: 900px) {
  .defense-grid,.prod-grid,.adv-grid,.case-grid,.pack-grid {
    grid-template-columns: 1fr;
  }
  .nav-menu {display: none;}
  .hamburger {display: flex;}
  .hero h1 {font-size: 32px;}
  .hero {padding: 100px 0 60px;}
  .section-title {font-size: 28px;}
  .btn {padding: 12px 24px; font-size: 14px;}
  .defense, .products, .rooms, .advantages, .cases, .packages, .faq {padding: 60px 0;}
  .chart-wrap {padding: 20px;}
}
@media (max-width: 480px) {
  .hero h1 {font-size: 26px;}
  .hero p {font-size: 16px;}
  .hero-btns {gap:12px;}
}