/* ========== CSS 变量 ========== */
:root {
  --primary: #0D47A1;
  --primary-dark: #0A3680;
  --cyan: #00BCD4;
  --cyan-dark: #0097A7;
  --purple: #7C4DFF;
  --purple-dark: #651FFF;
  --dark: #060e20;
  --dark2: #0a1528;
  --dark3: #0e1d3a;
  --light: #F4F6FB;
  --white: #FFFFFF;
  --text: #1A1A2E;
  --text2: #6B7280;
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  --max-width: 1240px;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-md: 0 8px 32px rgba(0,0,0,0.12);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.2);
}

/* ========== 重置 ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 78px; }
body {
  font-family: 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', -apple-system, sans-serif;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  background: var(--white);
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 36px; }
.hidden { display: none !important; }

/* ========== 导航栏 ========== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(6, 14, 32, 0.94);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: all 0.3s;
}
.navbar.scrolled { box-shadow: 0 4px 32px rgba(0,0,0,0.5); background: rgba(6,14,32,0.98); }
.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto; padding: 0 36px;
  height: 78px;
  display: flex; align-items: center; gap: 32px;
}
.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; text-decoration: none; position: relative; }
.logo-slogan {
  position: absolute; left: 0; bottom: -16px;
  font-size: 10px; font-weight: 600; color: var(--cyan);
  letter-spacing: 2px; white-space: nowrap;
  text-shadow: 0 0 8px rgba(0,188,212,0.3);
}
.logo-img { height: 42px; width: auto; display: block; filter: drop-shadow(0 0 8px rgba(0,180,240,0.25)); }
.logo-svg { filter: drop-shadow(0 0 8px rgba(0,188,212,0.4)); }
.logo-text { font-size: 20px; font-weight: 800; color: white; letter-spacing: 1px; }
.logo-text em { font-style: normal; font-size: 11px; color: var(--cyan); margin-left: 6px; display: block; line-height: 1; font-weight: 400; }
.nav-links { display: flex; align-items: center; gap: 0; margin-left: auto; }
.nav-links > li { position: relative; }
.nav-links > li > a {
  display: block; padding: 8px 15px;
  color: rgba(255,255,255,0.75); font-size: 16px; font-weight: 500;
  white-space: nowrap; transition: color 0.2s; border-radius: 6px;
}
.nav-links > li > a:hover, .nav-links > li > a.active {
  color: var(--cyan); background: rgba(0,188,212,0.08);
}
.arrow { font-size: 9px; margin-left: 2px; }
.dropdown-menu {
  position: absolute; top: calc(100% - 4px); left: 0;
  background: var(--dark2); border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px; padding: 10px 0 8px; min-width: 180px;
  box-shadow: var(--shadow-lg); opacity: 0; transform: translateY(-8px);
  pointer-events: none; transition: all 0.2s;
}
.dropdown:hover .dropdown-menu { opacity: 1; transform: translateY(0); pointer-events: auto; }
.dropdown-menu a {
  display: block; padding: 10px 20px; color: rgba(255,255,255,0.65); font-size: 14px; transition: all 0.2s;
}
.dropdown-menu a:hover { color: var(--cyan); background: rgba(0,188,212,0.08); padding-left: 24px; }
.btn-cta.nav-cta { margin-left: 8px; flex-shrink: 0; }
.hamburger { display: none; background: none; border: none; color: white; font-size: 22px; cursor: pointer; }

/* ========== 按钮 ========== */
.btn-primary, .btn-outline, .btn-submit {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 13px 26px; border-radius: var(--radius-sm); font-size: 14px;
  font-weight: 600; cursor: pointer; transition: all 0.25s; border: none; white-space: nowrap;
}
.btn-primary { background: var(--cyan); color: var(--dark); }
.btn-primary:hover { background: var(--cyan-dark); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(0,188,212,0.4); }
.btn-primary.lg { padding: 16px 36px; font-size: 16px; }
.btn-outline {
  background: transparent; color: white; border: 1.5px solid rgba(255,255,255,0.4);
}
.btn-outline:hover { border-color: white; background: rgba(255,255,255,0.08); }
.btn-outline.dark { color: var(--primary); border-color: var(--primary); }
.btn-outline.dark:hover { background: var(--primary); color: white; }
.btn-cta {
  background: var(--primary); color: white; padding: 10px 20px;
  border-radius: var(--radius-sm); font-size: 13px; font-weight: 600; border: none;
  cursor: pointer; transition: all 0.2s;
}
.btn-cta:hover { background: var(--primary-dark); transform: translateY(-1px); }
.btn-link { display: inline-flex; align-items: center; font-size: 14px; font-weight: 600; padding: 8px 0; gap: 4px; transition: gap 0.2s; }
.btn-link:hover { gap: 8px; }
.btn-link.cyan { color: var(--cyan); } .btn-link.purple { color: var(--purple); }

/* ========== Section ========== */
.bg-dark { background: var(--dark); }
.bg-dark2 { background: var(--dark2); }
.bg-light { background: var(--light); }
.bg-white { background: var(--white); }
.section-header { text-align: center; margin-bottom: 56px; }
.section-header.left { text-align: left; }
.section-title {
  font-size: 34px; font-weight: 700; color: var(--text); line-height: 1.35; margin-bottom: 10px;
}
.section-title.white { color: white; font-size: 34px; font-weight: 800; }
.section-subtitle { font-size: 15px; color: var(--text2); max-width: 600px; margin: 0 auto; }
.section-subtitle.white { color: rgba(255,255,255,0.6); font-size: 16px; }
/* 客户案例页：两个模块标题缩小 */
.cases-section-title { font-size: 26px; font-weight: 700; }
.cases-section-sub { font-size: 13px; }
.accent-cyan { color: var(--cyan); }
.accent-purple { color: var(--purple); }
section#latency { min-height: calc(100vh - 78px); height: calc(100vh - 78px); padding: 12px 0 24px; display: flex; flex-direction: column; justify-content: center; align-items: center; background: var(--dark2); box-sizing: border-box; overflow: hidden; }
section#latency .container { max-width: 100%; width: 100%; padding: 0 40px; box-sizing: border-box; }
section#latency .section-title { font-size: 30px; font-weight: 800; margin-bottom: 4px; }
section#latency .section-header { margin-bottom: 12px; }
section#latency .section-subtitle { font-size: 13px; color: rgba(255,255,255,0.5); margin-top: 2px; }
.section { padding: 90px 0; }

/* ========== HERO ========== */
.hero {
  min-height: 100vh; height: 100vh;
  background: linear-gradient(170deg, #060e1e 0%, #091830 25%, #0b1d3a 45%, #081428 65%, #060e20 100%);
  position: relative; overflow: hidden;
  display: flex; flex-direction: column; justify-content: center; padding-top: 68px;
}
.hero::before {
  content: '';
  position: absolute; right: -60px; top: -60px;
  width: 55%; height: 120%;
  background: radial-gradient(ellipse at center, rgba(0,150,240,0.07) 0%, rgba(0,100,200,0.02) 40%, transparent 70%);
  pointer-events: none; z-index: 0;
}
#globeCanvas {
  position: absolute; right: 0; top: 50%; transform: translateY(-50%);
  width: 55%; height: 100%; pointer-events: none; z-index: 1;
  mask-image: linear-gradient(to left, rgba(0,0,0,1) 60%, rgba(0,0,0,0) 100%);
  -webkit-mask-image: linear-gradient(to left, rgba(0,0,0,1) 60%, rgba(0,0,0,0) 100%);
}
.hero-inner {
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center;
  padding-top: 0; padding-bottom: 0; position: relative; z-index: 3;
  height: 100%;
}
.hero-title {
  font-size: 44px; font-weight: 800; color: white; line-height: 1.15; margin-bottom: 4px;
}
.hero-title-line { display: block; }
.hero-title-line2 {
  background: linear-gradient(135deg, #00BCD4, #7C4DFF);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-title .highlight {
  background: linear-gradient(135deg, #00BCD4, #7C4DFF);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; font-weight: 900;
}
.hero-title-divider {
  display: none;
}
.hero-title-divider span {
  display: none;
}
@keyframes divider-shine {
  0% { left: -100%; } 100% { left: 100%; }
}
.hero-sub-title {
  font-size: 13px; color: rgba(255,255,255,0.4); font-weight: 500;
  letter-spacing: 3px; margin-bottom: 20px; text-transform: uppercase;
}
.hero-desc-list {
  display: flex; flex-direction: column; gap: 4px; margin-bottom: 16px; max-width: 480px;
}
.hero-desc-list span {
  font-size: 17px; color: rgba(255,255,255,0.55); line-height: 1.8;
}
.hero-desc-list span::before {
  content: "· "; color: var(--cyan); font-weight: bold;
}
.hero-desc-sub {
  font-size: 14px; color: rgba(255,255,255,0.35); margin-bottom: 36px;
  line-height: 1.8; max-width: 480px;
}
.btn-hero-contact {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 32px; border-radius: 4px; font-size: 14px; font-weight: 600;
  cursor: pointer; transition: all 0.3s; border: 1px solid rgba(255,255,255,0.3);
  background: transparent; color: white; letter-spacing: 2px;
}
.btn-hero-contact:hover {
  background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.6);
}
.hero-right {
  display: flex; justify-content: center; align-items: center; height: 100%;
  position: relative;
}
.hero-globe-hint { width: 100%; height: 100%; }

/* ========== 热门产品网格 ========== */
.hot-products { padding: 100px 0 70px; }
.hot-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.hot-card {
  background: white; border: 1px solid #E5E7EB; border-radius: var(--radius);
  padding: 28px 24px; text-decoration: none; display: flex; flex-direction: column; gap: 10px;
  transition: all 0.3s; position: relative; overflow: hidden;
}
.hot-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, transparent, #E5E7EB);
  transition: all 0.3s;
}
.hot-card:hover::before { background: linear-gradient(90deg, var(--cyan), var(--purple)); }
.hot-card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(0,0,0,0.1); border-color: transparent; }
.hot-icon-wrap {
  width: 48px; height: 48px; border-radius: 12px; display: flex; align-items: center; justify-content: center;
}
.hot-icon { font-size: 24px; }
.hot-icon-wrap.cyan-bg { background: rgba(0,188,212,0.1); }
.hot-icon-wrap.blue-bg { background: rgba(13,71,161,0.1); }
.hot-icon-wrap.purple-bg { background: rgba(124,77,255,0.1); }
.hot-icon-wrap.teal-bg { background: rgba(20,184,166,0.1); }
.hot-icon-wrap.amber-bg { background: rgba(245,158,11,0.1); }
.hot-icon-wrap.green-bg { background: rgba(16,185,129,0.1); }
.hot-icon-wrap.rose-bg { background: rgba(239,68,68,0.1); }
.hot-card h4 { font-size: 16px; font-weight: 700; color: var(--text); }
.hot-card p { font-size: 12px; color: var(--text2); line-height: 1.7; margin: 0; }
.hot-link { font-size: 12px; font-weight: 600; }
.hot-link.cyan { color: var(--cyan); } .hot-link.blue { color: var(--primary); }
.hot-link.purple { color: var(--purple); } .hot-link.teal { color: #14B8A6; }
.hot-link.amber { color: var(--warning); } .hot-link.green { color: var(--success); } .hot-link.rose { color: var(--danger); }

/* ========== 业务双卡片 ========== */
.biz-section { padding: 100px 0; }
.biz-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.biz-card {
  background: white; border-radius: var(--radius);
  box-shadow: var(--shadow); overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
}
.biz-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.biz-card-top { height: 4px; }
.biz-card-top.cyan { background: linear-gradient(90deg, var(--cyan), #00E5FF); }
.biz-card-top.purple { background: linear-gradient(90deg, var(--purple), #B388FF); }
.biz-card-body { padding: 32px; }
.biz-card-title { font-size: 22px; font-weight: 700; margin-bottom: 24px; }
.biz-list { display: flex; flex-direction: column; gap: 16px; margin-bottom: 24px; }
.biz-list li { display: flex; gap: 12px; align-items: flex-start; }
.biz-icon-w { font-size: 20px; width: 38px; height: 38px; display: flex; align-items: center; justify-content: center; background: var(--light); border-radius: 8px; flex-shrink: 0; }
.biz-list li strong { display: block; font-size: 14px; margin-bottom: 1px; }
.biz-list li p { font-size: 12px; color: var(--text2); line-height: 1.6; }

/* ========== 核心优势 ========== */
.adv-section { padding: 100px 0; }
.adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.adv-card {
  background: var(--light); border-radius: var(--radius); padding: 30px 24px; text-align: center;
  transition: all 0.3s; border: 1px solid transparent;
}
.adv-card:hover { background: white; border-color: var(--primary); transform: translateY(-4px); box-shadow: var(--shadow); }
.adv-icon { font-size: 36px; margin-bottom: 14px; }
.adv-card h4 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.adv-card p { font-size: 13px; color: var(--text2); line-height: 1.65; }

/* ========== 二手服务器买卖（trade section） ========== */
.trade-section { padding: 80px 0; }
.trade-block {
  background: white; border-radius: var(--radius); padding: 36px; margin-bottom: 28px;
  border: 1px solid rgba(0,0,0,0.06);
}
.trade-block:last-child { margin-bottom: 0; }
.trade-header { display: flex; align-items: flex-start; gap: 18px; margin-bottom: 28px; }
.trade-icon { font-size: 40px; flex-shrink: 0; line-height: 1; }
.trade-title { font-size: 20px; font-weight: 700; color: var(--text1); margin-bottom: 4px; }
.trade-desc { font-size: 14px; color: var(--text2); line-height: 1.5; }

/* 二手/准新机 三列内容 */
.trade-content {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.trade-col h4 { font-size: 15px; font-weight: 700; color: var(--primary); margin-bottom: 12px; padding-bottom: 8px;
  border-bottom: 2px solid rgba(0,188,212,0.15); }
.trade-list { list-style: none; padding: 0; margin: 0; }
.trade-list li {
  font-size: 13px; color: var(--text2); line-height: 1.7; padding: 4px 0;
  position: relative; padding-left: 14px;
}
.trade-list li::before { content: "•"; color: var(--primary); position: absolute; left: 0; font-weight: bold; }
.trade-list strong { color: var(--text1); font-weight: 600; }

/* ========== 设备回收 3D弧形轮播 ========== */
.recycle-carousel {
  position: relative;
  padding: 26px 0 14px;
}
.carousel-viewport {
  position: relative;
  width: 100%;
  height: 260px;
  overflow: visible;
}
.carousel-stage {
  position: relative;
  width: 100%;
  height: 100%;
}

/* 步骤卡片 - 从中心定位 */
.recycle-carousel .recycle-step {
  position: absolute;
  top: 50%; left: 50%;
  width: 185px;
  background: linear-gradient(145deg, #ffffff, #f7fbff);
  border-radius: 16px;
  padding: 20px 16px 16px;
  text-align: center;
  border: 1.5px solid rgba(0,188,212,0.2);
  box-shadow:
    0 8px 32px rgba(0,150,180,0.1),
    0 2px 8px rgba(0,0,0,0.05),
    inset 0 1px 0 rgba(255,255,255,0.8);
  cursor: pointer;
  transition:
    transform 0.7s cubic-bezier(0.22, 0.61, 0.36, 1),
    opacity 0.5s ease,
    box-shadow 0.5s ease,
    border-color 0.5s ease,
    filter 0.5s ease;
  transform-origin: center center;
  user-select: none;
}
/* 活跃（中间）卡片 - JS控制transform，CSS只负责装饰 */
.recycle-carousel .recycle-step.active {
  border-color: var(--primary);
  box-shadow:
    0 14px 40px rgba(0,188,212,0.25),
    0 3px 12px rgba(0,0,0,0.06),
    0 0 0 2px rgba(0,188,212,0.1),
    inset 0 1px 0 rgba(255,255,255,0.9);
  z-index: 10 !important;
}
/* 侧边卡片只用opacity淡化，不用灰色滤镜 */
.recycle-carousel .recycle-step:not(.active) {
  /* 透明度由JS动态设置，这里只保留基础样式 */;
}

.recycle-carousel .step-num {
  width: 34px; height: 34px;
  background: linear-gradient(135deg, var(--primary), #00acc1);
  color: white;
  border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 700;
  margin-bottom: 10px;
  box-shadow: 0 4px 12px rgba(0,188,212,0.3);
  position: relative;
  z-index: 1;
}
.recycle-carousel .recycle-step.active .step-num {
  box-shadow: 0 6px 22px rgba(0,188,212,0.45);
  animation: numPulse 2s ease-in-out infinite;
}
@keyframes numPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.08); }
}

.recycle-carousel .recycle-step h5 {
  font-size: 13px; font-weight: 700; color: var(--text1); margin-bottom: 5px; line-height: 1.35;
  transition: font-size 0.7s ease;
}
.recycle-carousel .recycle-step.active h5 { font-size: 14.5px; }

.recycle-carousel .recycle-step p {
  font-size: 10.5px; color: var(--text2); line-height: 1.5; margin: 0;
  transition: font-size 0.7s ease;
}
.recycle-carousel .recycle-step.active p { font-size: 11.5px; }

/* 左右箭头按钮 */
.carousel-btn {
  position: absolute;
  top: 50%; z-index: 20;
  width: 38px; height: 38px;
  border-radius: 50%;
  border: 1.5px solid rgba(0,188,212,0.28);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: var(--primary);
  font-size: 22px; font-weight: 300; line-height: 1;
  transition: all 0.3s ease;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  transform: translateY(-50%);
}
.carousel-btn:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: 0 6px 24px rgba(0,188,212,0.3);
  transform: translateY(-50%) scale(1.08);
}
.carousel-btn:active { transform: translateY(-50%) scale(0.95); }
.carousel-prev { left: -8px; }
.carousel-next { right: -8px; }
.carousel-btn span { display: block; line-height: 0.9; margin-top: -2px; }

/* 底部进度点 */
.carousel-dots {
  display: flex; gap: 10px;
  justify-content: center;
  align-items: center;
  margin-top: 12px;
  height: 14px;
}
.carousel-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: rgba(0,188,212,0.2);
  border: 1.5px solid rgba(0,188,212,0.25);
  cursor: pointer;
  transition: all 0.35s ease;
  flex-shrink: 0;
}
.carousel-dot:hover { background: rgba(0,188,212,0.35); }
.carousel-dot.active {
  width: 30px; border-radius: 5px;
  background: var(--primary);
  border-color: var(--primary);
  box-shadow: 0 0 10px rgba(0,188,212,0.35);
}

/* 连接线动画（卡片之间的弧线） */
.carousel-stage::after {
  content: '';
  position: absolute;
  bottom: -24px;
  left: 15%;
  right: 15%;
  height: 3px;
  background: linear-gradient(90deg,
    transparent 0%, rgba(0,188,212,0.15) 15%,
    var(--primary) 50%,
    rgba(0,188,212,0.15) 85%, transparent 100%);
  border-radius: 2px;
  pointer-events: none;
}

/* 回收信息标签 */
.recycle-info { margin-top: 16px; }
.recycle-tags {
  display: flex; flex-wrap: wrap; gap: 10px; justify-content: center;
}
.r-tag {
  background: rgba(103,58,183,0.06); border: 1px solid rgba(103,58,183,0.15);
  border-radius: 50px; padding: 7px 16px; font-size: 12px; color: #673AB7; line-height: 1.45;
}

@media (max-width: 900px) {
  .trade-block { padding: 24px 18px; }
  .trade-content { grid-template-columns: 1fr; gap: 20px; }
  .recycle-carousel { padding: 20px 0 12px; }
  .carousel-viewport { height: 220px; }
  .carousel-btn { width: 32px; height: 32px; font-size: 18px; }
  .carousel-prev { left: 2px; }
  .carousel-next { right: 2px; }
  .recycle-tags { flex-direction: column; align-items: stretch; }
}

/* ========== 场景TAB ========== */
.scene-section { padding: 100px 0; }
.scene-tabs { display: flex; gap: 0; margin-bottom: 40px; border-bottom: 1.5px solid rgba(0,0,0,0.08); width: fit-content; }
.scene-tab {
  background: none; border: none; color: var(--text2); font-size: 15px; font-weight: 600;
  padding: 10px 24px; cursor: pointer; transition: all 0.2s; border-bottom: 2px solid transparent; margin-bottom: -1.5px;
}
.scene-tab.active { color: var(--cyan); border-bottom-color: var(--cyan); }
.scene-tab:hover { color: var(--text); }
.scene-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 18px; }
.scene-card {
  background: #f8fafc; border: 1px solid rgba(0,0,0,0.06);
  border-radius: var(--radius); padding: 26px; transition: all 0.3s;
}
.scene-card:hover { background: #fff; border-color: var(--cyan); transform: translateY(-3px); box-shadow: 0 8px 24px rgba(0,0,0,0.08); }
.scene-icon { font-size: 32px; margin-bottom: 12px; }
.scene-card h4 { font-size: 15px; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.scene-card p { font-size: 12px; color: var(--text2); line-height: 1.6; margin-bottom: 14px; }
.scene-tag {
  display: inline-block; background: rgba(0,188,212,0.08); color: var(--cyan-dark);
  border-radius: 4px; padding: 3px 9px; font-size: 11px; margin-bottom: 12px;
}
.scene-link { color: var(--cyan); font-size: 12px; font-weight: 600; }

/* ========== 解决方案页 ========== */
.solutions-section {
  padding: 60px 0 100px;
  background: #fff;
}
.solutions-section .container {
  max-width: 1240px;
}
.solutions-section .section-header { margin-bottom: 4px; }
.solutions-section .section-title { font-size: 28px; }
.solutions-section .section-subtitle { font-size: 13px; }
/* 按应用场景分类 */
.classify-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.classify-bar {
  width: 4px;
  height: 26px;
  background: var(--cyan);
  border-radius: 2px;
  flex-shrink: 0;
}
.classify-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 1px;
}
.classify-sub {
  font-size: 11px;
  color: var(--text2);
  line-height: 1.3;
}
.solutions-section .scene-tabs { margin-bottom: 14px; }
.solutions-section .scene-cards {
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.solutions-section .scene-card { padding: 20px; }
.solutions-section .scene-icon { font-size: 28px; margin-bottom: 8px; }
.solutions-section .scene-card h4 { font-size: 14px; margin-bottom: 6px; }
.solutions-section .scene-card p { font-size: 11px; margin-bottom: 10px; }
.solutions-section .scene-tag { font-size: 10px; margin-bottom: 8px; }
.solutions-section .scene-link { font-size: 11px; }

/* ========== 延时对比 ========== */
.latency-section { padding: 100px 0; }
.latency-wrapper { display: grid; grid-template-columns: 1fr 2fr; gap: 50px; align-items: center; }
.latency-tagline { font-size: 19px; color: var(--purple); font-weight: 600; margin-bottom: 20px; }
.latency-features { margin-bottom: 28px; }
.latency-features li { font-size: 14px; color: var(--text2); padding: 6px 0; border-bottom: 1px solid rgba(0,0,0,0.05); }
.latency-chart-box { background: white; border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }

/* ========== 案例卡片 ========== */
.cases-section { padding: 100px 0; }
.cases-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
  margin-bottom: 40px;
}
.case-card {
  background: var(--light); border-radius: var(--radius); padding: 26px 20px; text-align: left;
  border: 1px solid transparent; transition: all 0.3s;
}
.case-card:hover { border-color: var(--primary); transform: translateY(-3px); box-shadow: var(--shadow); background: white; }
.case-header { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.case-header .emoji { font-size: 28px; }
.case-tag { display: inline-block; background: rgba(13,71,161,0.08); color: var(--primary); border-radius: 12px; padding: 2px 10px; font-size: 11px; font-weight: 600; }
.case-card h4 { font-size: 15px; font-weight: 700; margin-bottom: 10px; }
.case-highlight { font-size: 13px; font-weight: 600; color: var(--primary); margin-bottom: 10px; padding: 8px 12px; background: rgba(13,71,161,0.04); border-radius: 6px; border-left: 3px solid var(--primary); }
.case-solution { font-size: 12px; color: var(--text2); line-height: 1.6; }
.cases-more { text-align: center; }

/* ========== CTA ========== */
.cta-section { padding: 48px 0 0; background: var(--dark2); }
.cta-wrapper { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: center; }
.cta-left h2 { font-size: 26px; font-weight: 700; color: white; margin-bottom: 8px; line-height: 1.3; }
.cta-left > p { color: rgba(255,255,255,0.65); font-size: 13px; margin-bottom: 14px; }
.cta-promises { margin-bottom: 0; }
.cta-promises li { color: rgba(255,255,255,0.8); font-size: 13px; padding: 3px 0; }
.form-card { background: #BCC2C9; border-radius: var(--radius); padding: 24px; box-shadow: none; }
.form-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 12px; }
.consult-form { display: flex; flex-direction: column; gap: 10px; }
.form-group input, .form-group select {
  width: 100%; padding: 9px 12px; border: 1px solid #E5E7EB; border-radius: var(--radius-sm);
  font-size: 13px; outline: none; color: var(--text); transition: border-color 0.2s; background: white;
}
.form-group input:focus, .form-group select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(13,71,161,0.08); }
.btn-submit { width: 100%; background: var(--primary); color: white; padding: 13px; font-size: 14px; font-weight: 600; cursor: pointer; border: none; border-radius: var(--radius-sm); transition: all 0.2s; }
.btn-submit:hover { background: var(--primary-dark); }

/* ========== Footer ========== */
.footer { background: var(--dark2); padding: 56px 0 0; color: rgba(255,255,255,0.55); }
.footer-grid { display: grid; grid-template-columns: 1.8fr 1fr 1fr 1fr 1fr; gap: 32px; padding-bottom: 36px; border-bottom: 1px solid rgba(255,255,255,0.06); }
.footer-brand .logo-text { color: white; }
.footer-brand p { font-size: 13px; color: rgba(255,255,255,0.4); margin-top: 10px; line-height: 1.7; }
.footer-col h5 { font-size: 14px; font-weight: 700; color: rgba(255,255,255,0.75); margin-bottom: 14px; }
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col a { font-size: 12px; color: rgba(255,255,255,0.4); transition: color 0.2s; }
.footer-col a:hover { color: var(--cyan); }
.footer-bottom { text-align: center; padding: 22px 0; font-size: 12px; color: rgba(255,255,255,0.3); display: flex; flex-direction: column; gap: 4px; }
.footer-bottom a { color: rgba(255,255,255,0.35); }

/* ========== 弹窗 ========== */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.55); backdrop-filter: blur(4px);
  z-index: 9999; display: none; align-items: center; justify-content: center;
}
.modal-overlay.open { display: flex; }
.modal-box {
  background: white; border-radius: var(--radius); padding: 36px; width: 460px; max-width: 90vw;
  position: relative; box-shadow: 0 24px 64px rgba(0,0,0,0.4); animation: slideUp 0.3s ease;
}
@keyframes slideUp { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
.modal-close { position: absolute; top: 14px; right: 18px; background: none; border: none; font-size: 22px; color: var(--text2); cursor: pointer; }
.modal-box h3 { font-size: 20px; margin-bottom: 6px; }
.modal-box > p { color: var(--text2); font-size: 13px; margin-bottom: 22px; }
.modal-box input, .modal-box select {
  width: 100%; padding: 11px 14px; border: 1px solid #E5E7EB; border-radius: var(--radius-sm);
  font-size: 13px; outline: none; margin-bottom: 10px; transition: border-color 0.2s;
}
.modal-box input:focus, .modal-box select:focus { border-color: var(--primary); }
.modal-box button[type="submit"] {
  width: 100%; background: var(--primary); color: white; padding: 12px; font-size: 14px;
  font-weight: 600; border: none; border-radius: var(--radius-sm); cursor: pointer; margin-top: 4px;
}
.toast {
  position: fixed; bottom: 40px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: #064E3B; color: #6EE7B7; padding: 12px 28px; border-radius: 8px;
  font-size: 13px; opacity: 0; transition: all 0.3s; z-index: 99999; pointer-events: none;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ========== 子页面Page Hero ========== */
.page-hero { padding: 120px 0 70px; text-align: center; }
.page-hero h1 { font-size: 28px; font-weight: 800; color: white; margin-bottom: 12px; }
.page-hero p { font-size: 17px; color: rgba(255,255,255,0.6); max-width: 650px; margin: 0 auto 30px; }
.about-industry-grid {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  max-width: 800px; margin: 12px auto 0;
}
.about-industry-col {
  display: flex; align-items: center; gap: 6px; flex-wrap: nowrap;
  justify-content: center;
  font-size: 14px; color: rgba(255,255,255,0.6); white-space: nowrap;
}
.anchor-tabs { display: flex; gap: 6px; justify-content: center; flex-wrap: wrap; }
.anchor-tab {
  padding: 8px 20px; background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.12);
  color: rgba(255,255,255,0.6); border-radius: 6px; font-size: 13px; font-weight: 500;
  cursor: pointer; transition: all 0.2s; text-decoration: none;
}
.anchor-tab:hover, .anchor-tab.active { background: white; color: var(--dark); border-color: white; }

/* ========== GPU定价表 ========== */
.pricing-category {
  margin-bottom: 44px;
}
.pricing-category h3 {
  font-size: 20px; font-weight: 700; margin-bottom: 16px; color: var(--text);
  display: flex; align-items: center; gap: 8px;
}
.pricing-table {
  width: 100%; border-collapse: separate; border-spacing: 0;
  background: white; border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow);
}
.pricing-table th {
  background: var(--dark2); color: white; padding: 14px 16px; text-align: left; font-size: 12px; font-weight: 600; letter-spacing: 0.3px;
}
.pricing-table td {
  padding: 12px 16px; font-size: 13px; color: var(--text2); border-bottom: 1px solid #F3F4F6;
}
.pricing-table tr:last-child td { border-bottom: none; }
.pricing-table tr:hover td { background: rgba(0,188,212,0.02); }
.price-current { font-size: 15px; font-weight: 700; color: var(--danger); }
.price-original { font-size: 12px; color: var(--text2); text-decoration: line-through; margin-left: 4px; }
.btn-inquiry-sm {
  display: inline-block; padding: 6px 16px; background: var(--cyan); color: white;
  border-radius: 5px; font-size: 12px; font-weight: 600; cursor: pointer; border: none;
  transition: background 0.2s; white-space: nowrap;
}
.btn-inquiry-sm:hover { background: var(--cyan-dark); }

/* ========== 服务流程 ========== */
.process-section { padding: 90px 0; }
.process-steps {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px;
}
.process-step {
  text-align: center; padding: 28px 16px; background: white; border-radius: var(--radius);
  box-shadow: var(--shadow); position: relative;
}
.process-step-num {
  width: 40px; height: 40px; margin: 0 auto 14px;
  background: var(--cyan); color: var(--dark); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 700;
}
.process-step h4 { font-size: 14px; font-weight: 700; margin-bottom: 6px; }
.process-step p { font-size: 12px; color: var(--text2); line-height: 1.5; }
.process-arrow {
  position: absolute; top: 50%; right: -32px; transform: translateY(-100%);
  color: var(--cyan); font-size: 18px; font-weight: 700;
}
.process-step:last-child .process-arrow { display: none; }

/* ========== 企业IDC运维与硬件维保服务（左右分栏） ========== */
.ops-solution-section { padding: 90px 0; }

.ops-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: stretch;
}

/* --- 左侧：硬件维保面板 --- */
.ops-hardware-panel {
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.ops-panel-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 20px;
  font-size: 16px;
}
.ops-panel-header h3 { font-size: 17px; font-weight: 700; margin: 0; }
.ops-panel-icon { font-size: 20px; }

.hw-header {
  background: linear-gradient(135deg, #0a1528 0%, #1a2a4a 100%);
  color: white;
}

.svc-header {
  background: linear-gradient(135deg, #0a1528 0%, #1a2a4a 100%);
  color: white;
}

.ops-hw-content { padding: 14px 18px 16px; }

.hw-block {
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px dashed #E5E7EB;
}
.hw-block:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }

.hw-block-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.hw-tag {
  display: inline-flex;
  align-items: center;
  font-size: 10px;
  font-weight: 600;
  padding: 1px 8px;
  border-radius: 50px;
  line-height: 1.6;
}
.hw-tag.core {
  background: rgba(239,68,68,0.08);
  color: #DC2626;
  border: 1px solid rgba(239,68,68,0.2);
}
.hw-tag.schedule {
  background: rgba(13,71,161,0.08);
  color: var(--primary);
  border: 1px solid rgba(13,71,161,0.15);
}

.hw-items { display: flex; flex-direction: column; gap: 7px; }

.hw-item {
  background: #FAFBFD;
  border-radius: var(--radius-sm);
  padding: 8px 11px;
  border-left: 3px solid var(--primary);
}
.hw-item-head {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-bottom: 2px;
}
.hw-item-head strong {
  font-size: 12.5px;
  color: var(--dark);
}
.hw-item-icon { font-size: 13px; flex-shrink: 0; }
.hw-item p {
  font-size: 11.5px;
  color: var(--text2);
  line-height: 1.55;
  margin: 0;
  padding-left: 19px;
}

.hw-sub-list {
  margin: 0;
  padding-left: 20px;
  list-style: none;
}
.hw-sub-list li {
  position: relative;
  font-size: 12.5px;
  color: var(--text2);
  line-height: 1.7;
  padding-left: 14px;
}
.hw-sub-list li::before {
  content: '·';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.4;
}

/* --- 右侧：运维服务对比表 --- */
.ops-service-table-wrap {
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.ops-compare-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
}

.ops-compare-table thead th {
  padding: 12px 16px;
  font-size: 13px;
  font-weight: 600;
  text-align: center;
  color: white;
  border-right: 1px solid rgba(255,255,255,0.1);
}
.ops-compare-table .th-label {
  text-align: left;
  padding-left: 20px;
  background: #F8FAFC !important;
  min-width: 200px;
  width: 50%;
  color: #92400E;
}
.ops-compare-table .th-standard { background: #F1F5F9; color: #92400E; }
.ops-compare-table .th-gold { background: #F1F5F9; color: #92400E; }
.ops-compare-table .th-platinum { background: #FFFFFF; color: #92400E; border-bottom: 2px solid #FEF3C7; }

.ops-compare-table tbody td {
  padding: 13px 14px;
  font-size: 12.5px;
  color: var(--text2);
  text-align: center;
  border-bottom: 1px solid #F3F4F6;
  border-right: 1px solid #F3F4F6;
  vertical-align: middle;
}
.ops-compare-table tbody tr:last-child td { border-bottom: none; }
.ops-compare-table .td-label {
  text-align: left;
  font-weight: 600;
  color: var(--text);
  padding-left: 20px;
  background: #FAFBFD;
  font-size: 13px;
}
.ops-compare-table tbody tr:hover td { background: rgba(0,188,212,0.03); }
.ops-compare-table tbody tr:hover .td-label { background: rgba(0,188,212,0.05); }

/* 响应式 */
@media (max-width: 1024px) {
  .ops-layout {
    grid-template-columns: 1fr;
  }
  .ops-hardware-panel { order: 1; }
  .ops-service-table-wrap { order: 2; }
}

/* ========== 延时表格 ========== */
.latency-table-wrap { background: rgba(255,255,255,0.03); border-radius: var(--radius); overflow: hidden; padding: 4px 0; flex: 1; display: flex; align-items: center; }
.latency-table { width: 100%; border-collapse: collapse; table-layout: fixed; }
.latency-table th { background: var(--dark3); color: rgba(255,255,255,0.85); padding: 10px 16px; text-align: left; font-size: 13px; font-weight: 600; }
.latency-table td { padding: 8px 16px; border-bottom: 1px solid rgba(255,255,255,0.05); color: rgba(255,255,255,0.75); font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.latency-public { color: var(--danger); font-weight: 600; font-size: 14px; }
.latency-private { color: var(--success); font-weight: 600; font-size: 14px; }
.latency-ratio { color: var(--success); font-weight: 700; font-size: 14px; }

/* ========== SLA卡片 ========== */
.sla-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.sla-card {
  background: white; border-radius: var(--radius); overflow: hidden;
  border: 1px solid #E5E7EB; transition: all 0.3s;
}
.sla-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.sla-card-header { padding: 24px 20px; color: white; text-align: center; }
.sla-card-header.diamond { background: linear-gradient(135deg, #1a237e, #283593); }
.sla-card-header.gold { background: linear-gradient(135deg, #e65100, #f57c00); }
.sla-card-header.platinum { background: linear-gradient(135deg, #4a148c, #7b1fa2); }
.sla-card-header h4 { font-size: 17px; margin-bottom: 4px; }
.sla-card-header .sla-badge { font-size: 11px; opacity: 0.7; }
.sla-card-body { padding: 20px; }
.sla-card-body ul li { font-size: 13px; color: var(--text2); padding: 7px 0; border-bottom: 1px solid #F3F4F6; }
.sla-card-body ul li:last-child { border-bottom: none; }
.sla-card-body ul li::before { content: "✦ "; color: var(--purple); font-size: 10px; }

/* ========== 功能说明表 ========== */
.func-table { background: white; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.func-row { display: grid; grid-template-columns: 180px 1fr; border-bottom: 1px solid #F3F4F6; }
.func-row:last-child { border-bottom: none; }
.func-label { padding: 20px 24px; font-weight: 700; font-size: 14px; background: rgba(124,77,255,0.03); border-right: 1px solid #F3F4F6; display: flex; align-items: flex-start; gap: 6px; }
.func-value { padding: 20px 24px; font-size: 13px; color: var(--text2); line-height: 1.8; }
.func-value strong { color: var(--text); }

/* ========== GPU卡片 ========== */
.gpu-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.gpu-card {
  background: white; border-radius: var(--radius); padding: 24px;
  border: 1px solid #E5E7EB; position: relative;
  transition: all 0.3s;
  display: flex; flex-direction: column;
}
.gpu-card:hover { border-color: var(--cyan); transform: translateY(-4px); box-shadow: var(--shadow-md); }
.gpu-card.featured { border-color: var(--cyan); box-shadow: 0 0 0 1px var(--cyan); }
.gpu-badge {
  position: absolute; top: 12px; right: 12px;
  font-size: 10px; font-weight: 700; padding: 3px 9px; border-radius: 4px;
}
.gpu-badge.hot { background: #FEF2F2; color: var(--danger); }
.gpu-badge.best { background: #ECFDF5; color: var(--success); }
.gpu-badge.new { background: #EFF6FF; color: var(--primary); }
.gpu-brand { font-size: 10px; font-weight: 700; letter-spacing: 1.5px; color: var(--text2); text-transform: uppercase; margin-bottom: 4px; }
.gpu-model { font-size: 22px; font-weight: 700; color: var(--text); margin-bottom: 2px; }
.gpu-subtitle { font-size: 12px; color: var(--text2); margin-bottom: 16px; }
.gpu-specs { background: var(--light); border-radius: 6px; padding: 14px; margin-bottom: 14px; }
.gpu-specs p { font-size: 12px; color: var(--text2); padding: 3px 0; border-bottom: 1px solid rgba(0,0,0,0.05); }
.gpu-specs p:last-child { border-bottom: none; }
.gpu-specs strong { color: var(--text); }
.gpu-scenes { margin-bottom: 16px; }
.gpu-scenes p { font-size: 11px; color: var(--text2); margin-bottom: 4px; font-weight: 600; }
.gpu-scenes li { font-size: 12px; color: var(--text2); padding: 1px 0; }
.gpu-scenes li::before { content: "• "; color: var(--cyan); }
.btn-inquiry {
  display: block; width: 100%; text-align: center;
  padding: 10px; background: var(--cyan); color: var(--dark); border-radius: 6px;
  font-size: 13px; font-weight: 600; transition: background 0.2s; cursor: pointer; border: none;
  margin-top: auto;
}
.btn-inquiry:hover { background: var(--cyan-dark); color: white; }
.btn-inquiry.purple { background: var(--purple); color: white; }
.btn-inquiry.purple:hover { background: var(--purple-dark); }

/* ========== HPC高性能计算专区 ========== */
.hpc-section { padding: 80px 0; }
.hpc-layout { display: grid; grid-template-columns: 260px 1fr; gap: 28px; align-items: start; }
.industry-sidebar { background: white; border-radius: var(--radius); overflow: hidden; border: 1px solid #E5E7EB; }
.industry-item {
  padding: 14px 18px; cursor: pointer; font-size: 13px; font-weight: 500;
  border-bottom: 1px solid #F3F4F6; transition: all 0.2s; display: flex; align-items: center; gap: 8px;
}
.industry-item:hover { background: var(--light); }
.industry-item.active { background: rgba(0,188,212,0.06); border-left: 3px solid var(--cyan); color: var(--text); font-weight: 700; }
.config-panel { background: white; border-radius: var(--radius); padding: 28px; border: 1px solid #E5E7EB; }
.config-title { font-size: 18px; font-weight: 700; margin-bottom: 16px; }
.config-specs { margin-bottom: 20px; }
.config-spec-item { display: flex; gap: 10px; padding: 8px 0; border-bottom: 1px solid #F3F4F6; font-size: 13px; }
.config-spec-label { font-weight: 600; width: 50px; flex-shrink: 0; }
.config-spec-value { color: var(--text2); }
.config-advantages { margin-bottom: 16px; }
.config-advantages h5 { font-size: 13px; font-weight: 700; margin-bottom: 8px; }
.config-advantages li { font-size: 12px; color: var(--text2); padding: 2px 0; }
.config-advantages li::before { content: "✓ "; color: var(--success); font-weight: 700; }
.config-price { font-size: 16px; font-weight: 700; color: var(--primary); margin-bottom: 12px; }

/* ========== 节点布局 ========== */
/* ═══════ 全球骨干网络节点（全宽地图版） ═══════ */
.gb-section { position: relative; padding: 0; overflow: hidden; min-height: calc(100vh - 80px); background: linear-gradient(180deg, #040b1d, #02060f 100%); }
section#nodes { padding-top: 0; min-height: calc(100vh - 78px); }
section#nodes .gb-map-wrapper { height: calc(100vh - 78px); }

/* 地图容器 - 科技感深色背景 */
.gb-map-wrapper {
  position: relative;
  width: 100%;
  height: calc(100vh - 80px);
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 60% at 50% 45%, rgba(34,211,238,0.10), transparent 60%),
    radial-gradient(ellipse 60% 50% at 50% 100%, rgba(167,139,250,0.10), transparent 60%),
    linear-gradient(180deg, #040b1d, #02060f 100%);
}
/* 科技栅格 */
.gb-map-wrapper::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(86,180,255,0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(86,180,255,0.07) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, #000 30%, transparent 80%);
  pointer-events: none;
}
.gb-map-wrapper svg.gb-map-svg { position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: 1; }

/* ── D3 地图元素样式（参考 D:/index.html）── */
.gb-map-wrapper .dots path { fill: none; stroke: rgba(86,180,255,0.28); stroke-width: 1.4; stroke-linecap: round; }
.gb-map-wrapper .arc { fill: none; stroke-width: 1.2; opacity: 0.5; }
.gb-map-wrapper .particle { }
@keyframes gbPulse {
  0% { transform: scale(0.6); opacity: 0.9; }
  100% { transform: scale(2.6); opacity: 0; }
}
.gb-map-wrapper .ring { transform-origin: center; transform-box: fill-box; animation: gbPulse 2.6s ease-out infinite; will-change: transform, opacity; }
.gb-map-wrapper .ring.d2 { animation-delay: 0.9s; }
.gb-map-wrapper .label { font-size: 11px; fill: #dff0ff; font-weight: 500; letter-spacing: 1px; paint-order: stroke; stroke: #020714; stroke-width: 3px; stroke-linejoin: round; }
.gb-map-wrapper .label.hub { font-size: 13px; fill: #ffffff; }

/* ── 地图加载 loading 占位 ── */
.gb-loading {
  position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 16px; z-index: 20; pointer-events: none;
  background: linear-gradient(180deg, #040b1d, #02060f);
  transition: opacity 0.4s ease;
  color: rgba(129,140,248,0.7); font-size: 13px; letter-spacing: 2px;
}
.gb-loading-ring {
  width: 44px; height: 44px; border-radius: 50%;
  border: 2px solid rgba(99,102,241,0.15);
  border-top-color: rgba(129,140,248,0.8);
  animation: gbLoadSpin 0.9s linear infinite;
}
@keyframes gbLoadSpin { to { transform: rotate(360deg); } }

/* ── 标题层（居中浮动） ── */
.gb-title-overlay {
  position: absolute; top: 32px; left: 0; right: 0;
  text-align: center; z-index: 10; pointer-events: none;
}
.gb-en-label {
  font-size: 10px; font-weight: 700; letter-spacing: 5px;
  color: rgba(129,140,248,0.6); text-transform: uppercase; margin-bottom: 8px;
}
.gb-cn-title {
  font-size: 32px; font-weight: 900; color: var(--cyan); margin: 0 0 10px;
  text-shadow: 0 0 24px rgba(0,188,212,0.35); letter-spacing: 4px;
}
.gb-subtitle {
  font-size: 14px; color: rgba(255,255,255,0.6);
  margin: 0; letter-spacing: 2px;
}

/* ── 四角科技直角框 ── */
.gb-corners { position: absolute; inset: 18px; pointer-events: none; z-index: 5; }
.gb-corner {
  position: absolute; width: 36px; height: 36px;
  border-color: rgba(96,165,250,0.45); border-style: solid;
  border-width: 0; box-shadow: 0 0 12px rgba(96,165,250,0.15), inset 0 0 8px rgba(96,165,250,0.06);
}
.gb-corner-tl { top: 0; left: 0; border-top-width: 2px; border-left-width: 2px; }
.gb-corner-tr { top: 0; right: 0; border-top-width: 2px; border-right-width: 2px; }
.gb-corner-bl { bottom: 0; left: 0; border-bottom-width: 2px; border-left-width: 2px; }
.gb-corner-br { bottom: 0; right: 0; border-bottom-width: 2px; border-right-width: 2px; }
/* 角落内角小短线装饰 */
.gb-corner::after {
  content:''; position: absolute;
  background: linear-gradient(135deg, transparent 40%, rgba(96,165,250,0.35) 50%, transparent 60%);
}
.gb-corner-tl::after { bottom: 2px; right: 2px; width: 14px; height: 1px; transform: rotate(-45deg); }
.gb-corner-tr::after { bottom: 2px; left: 2px; width: 14px; height: 1px; transform: rotate(45deg); }
.gb-corner-bl::after { top: 2px; right: 2px; width: 14px; height: 1px; transform: rotate(45deg); }
.gb-corner-br::after { top: 2px; left: 2px; width: 14px; height: 1px; transform: rotate(-45deg); }

/* ── 扫描光带 ── */
.gb-scan-line {
  position: absolute; top: 56px; left: 20%; right: 20%; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(129,140,248,0.35), transparent);
  z-index: 6; animation: gbScanMove 3.5s ease-in-out infinite;
  will-change: transform;
  pointer-events: none;
}
@keyframes gbScanMove {
  0%,100% { opacity: 0.25; width: 20%; left: 40%; }
  50%      { opacity: 0.7; width: 50%; left: 25%; }
}

/* ── 底部右侧 HUD 数据栏（带框） ── */
.gb-hud-bar {
  position: absolute; bottom: 22px; right: 28px;
  display: flex; align-items: center; gap: 16px;
  padding: 14px 24px;
  background: linear-gradient(155deg, rgba(15,23,42,0.82), rgba(30,41,59,0.65));
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-radius: 12px;
  border: 1px solid rgba(99,102,241,0.18);
  box-shadow:
    0 4px 24px rgba(0,0,0,0.25),
    0 0 18px rgba(99,102,241,0.08),
    inset 0 1px 0 rgba(255,255,255,0.05);
  z-index: 10;
}
.gb-hud-item { text-align: center; min-width: 72px; }
.gb-hud-num {
  display: block; font-size: 26px; font-weight: 800; line-height: 1;
  background: linear-gradient(180deg, #E2E8F0, #94A3B8);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.gb-hud-suf { font-size: 13px; font-weight: 600; -webkit-text-fill-color: #6366F1; }
.gb-hud-unit {
  display: block; font-size: 9px; font-weight: 700; letter-spacing: 2.5px;
  color: rgba(99,102,241,0.5); margin-top: 2px;
}
.gb-hud-divider {
  width: 1px; height: 34px;
  background: linear-gradient(180deg, transparent, rgba(99,102,241,0.25), transparent);
}

/* ── 底部左侧图例 ── */
.gb-legend-bar {
  position: absolute; bottom: 26px; left: 28px;
  display: flex; gap: 20px; z-index: 10;
}
.gb-leg {
  display: flex; align-items: center; gap: 6px;
  font-size: 11px; color: rgba(255,255,255,0.45); letter-spacing: 0.5px;
}
.gb-leg i {
  width: 9px; height: 9px; border-radius: 50%; display: inline-block; flex-shrink: 0;
}

/* ========== 运营商标签 ========== */
.operator-tags { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 40px; }
.operator-tag { background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1); color: rgba(255,255,255,0.55); padding: 6px 14px; border-radius: 6px; font-size: 12px; }

/* ========== 故障处理流程 ========== */
.fault-table { width: 100%; border-collapse: collapse; background: white; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.fault-table th { background: var(--dark2); color: white; padding: 12px 15px; text-align: left; font-size: 12px; font-weight: 600; }
.fault-table td { padding: 10px 15px; font-size: 12px; color: var(--text2); border-bottom: 1px solid #F3F4F6; }
.fault-table tr:last-child td { border-bottom: none; }
.fault-level { display: inline-block; padding: 2px 8px; border-radius: 3px; font-weight: 600; font-size: 11px; }
.fault-level.l1 { background: #FEF2F2; color: var(--danger); }
.fault-level.l2 { background: #FFFBEB; color: #D97706; }
.fault-level.l3 { background: #EFF6FF; color: var(--primary); }
.fault-level.l4 { background: var(--light); color: var(--text2); }

/* ========== 案例详情 ========== */
.case-detail-card {
  background: white; border-radius: var(--radius); overflow: hidden;
  border: 1px solid #E5E7EB; transition: all 0.3s;
}
.case-detail-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.case-detail-header { padding: 28px 24px; color: white; display: flex; align-items: center; gap: 14px; }
.case-detail-header h3 { font-size: 17px; }
.case-detail-header .case-industry { background: rgba(255,255,255,0.2); padding: 2px 8px; border-radius: 4px; font-size: 11px; }
.case-detail-body { padding: 22px; }
.case-detail-body h4 { font-size: 13px; font-weight: 700; margin: 14px 0 6px; color: var(--text); }
.case-detail-body h4:first-child { margin-top: 0; }
.case-detail-body p { font-size: 13px; color: var(--text2); line-height: 1.7; margin-bottom: 8px; }
.case-detail-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 10px; }
.case-detail-tags span { font-size: 10px; padding: 3px 8px; border-radius: 4px; background: var(--light); color: var(--primary); font-weight: 600; }

/* --- 算力案例特有样式 --- */
.case-scale-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, #0D3B7A, #1a5a8a);
  padding: 4px 14px;
  border-radius: 50px;
  margin-bottom: 10px;
}

.case-config-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-top: 4px;
}

.case-config-item {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  background: #F8FAFC;
  border-radius: 4px;
  padding: 6px 8px;
  font-size: 11px;
}
.case-config-item .cfg-label {
  flex-shrink: 0;
  font-weight: 700;
  color: #1a5a8a;
  min-width: 32px;
}
.case-config-item .cfg-val {
  color: var(--text2);
  line-height: 1.5;
}

/* ========== FAQ ========== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: white; border-radius: var(--radius-sm); border: 1px solid #E5E7EB;
  margin-bottom: 12px; overflow: hidden;
}
.faq-q {
  padding: 16px 20px; font-size: 14px; font-weight: 600; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center;
  transition: background 0.2s; user-select: none;
}
.faq-q:hover { background: var(--light); }
.faq-q .faq-icon { font-size: 16px; transition: transform 0.2s; color: var(--cyan); }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-a { padding: 0 20px; max-height: 0; overflow: hidden; transition: all 0.3s; font-size: 13px; color: var(--text2); line-height: 1.8; background: var(--light); }
.faq-item.open .faq-a { padding: 16px 20px; max-height: 300px; }

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-right { display: none; }
  .hero-title { font-size: 38px; }
  #globeCanvas { width: 100%; opacity: 0.3; }
  .hot-grid { grid-template-columns: repeat(2, 1fr); }
  .biz-cards { grid-template-columns: 1fr; }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .scene-cards { grid-template-columns: repeat(2, 1fr); }
  .solutions-section .scene-cards { grid-template-columns: repeat(2, 1fr); }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .cta-wrapper { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .gpu-grid { grid-template-columns: repeat(2, 1fr); }
  .latency-wrapper { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: repeat(3, 1fr); }
  .sla-grid { grid-template-columns: 1fr; }

  /* 全宽地图响应式 */
  section#nodes .gb-map-wrapper { height: calc(100vh - 60px); }
  .gb-cn-title { font-size: 22px; }
  .gb-hud-bar {
    right: 10px; bottom: 12px;
    gap: 10px; padding: 10px 14px; flex-wrap: wrap;
  }
  .gb-hud-num { font-size: 18px; }
  .gb-hud-item { min-width: 56px; }
  .gb-hud-divider { display: none; }
  .gb-legend-bar { left: 10px; bottom: 14px; flex-wrap: wrap; gap: 8px; max-width: calc(100% - 120px); }
  .gb-corners { inset: 8px; }
  .hpc-layout { grid-template-columns: 1fr; }
  .pricing-table { font-size: 11px; }
  .pricing-table th, .pricing-table td { padding: 8px 10px; }
}
@media (max-width: 768px) {
  .container { padding: 0 18px; }
  .nav-links { display: none; }
  .hamburger { display: block; }
  .hero-title { font-size: 38px; }
  .section-title { font-size: 26px; }
  .hot-grid { grid-template-columns: 1fr; }
  .adv-grid { grid-template-columns: 1fr; }
  .scene-cards { grid-template-columns: 1fr; }
  .solutions-section .scene-cards { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .gpu-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}

/* ========== 微信浮动按钮 ========== */
/* ========== 微信浮动按钮（科技感重设计）========== */
.wechat-float {
  position: fixed;
  right: 24px;
  bottom: 100px;
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 50px;
  cursor: pointer;
  /* 深色毛玻璃底 */
  background: linear-gradient(135deg, rgba(15,23,42,0.92), rgba(30,41,59,0.88));
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  /* 边框发光 */
  border: 1px solid rgba(99,102,241,0.35);
  box-shadow:
    0 4px 24px rgba(0,0,0,0.3),
    0 0 18px rgba(99,102,241,0.12),
    inset 0 1px 0 rgba(255,255,255,0.06);
  color: #E2E8F0;
  transition: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  overflow: hidden;
  /* 脉冲动画 */
  animation: floatPulse 2.8s ease-in-out infinite;
}
/* 扫光效果 */
.wechat-float::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 60%; height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(99,102,241,0.18),
    transparent
  );
  animation: shimmer 3.5s ease-in-out infinite;
  will-change: transform;
}
@keyframes floatPulse {
  0%, 100% { box-shadow: 0 4px 24px rgba(0,0,0,0.3), 0 0 18px rgba(99,102,241,0.12); }
  50%      { box-shadow: 0 4px 32px rgba(0,0,0,0.35), 0 0 28px rgba(99,102,241,0.25); }
}
@keyframes shimmer {
  0%   { transform: translateX(-100%); }
  40%, 100% { transform: translateX(200%); }
}

.wechat-float:hover {
  transform: translateY(-3px) scale(1.04);
  border-color: rgba(129,140,248,0.55);
  box-shadow:
    0 8px 36px rgba(0,0,0,0.35),
    0 0 30px rgba(99,102,24,0.28),
    inset 0 1px 0 rgba(255,255,255,0.1);
  color: #fff;
}

.wechat-float-icon {
  font-size: 17px;
  line-height: 1;
  filter: drop-shadow(0 0 5px rgba(99,102,241,0.4));
}
.wechat-float-text {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 1.5px;
  white-space: nowrap;
}

/* ========== 微信客服卡片（右下角弹出） ========== */

/* 遮罩层 - 透明 */
.wechat-card-overlay {
  position: fixed; inset: 0; z-index: 10001;
  background: rgba(0,0,0,0.35);
  opacity: 0; visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
  cursor: pointer;
}
.wechat-card-overlay.open { opacity: 1; visibility: visible; }

/* 卡片主体 */
.wechat-card {
  position: fixed; right: 24px; bottom: 160px; z-index: 10002;
  width: 370px; max-width: calc(100vw - 48px); max-height: 85vh; overflow-y: auto;
  background: linear-gradient(172deg, #151d30 0%, #1a2235 40%, #151d30 100%);
  border-radius: 20px;
  border: 1px solid rgba(99,102,241,0.22);
  box-shadow:
    0 24px 60px rgba(0,0,0,0.55),
    0 0 40px rgba(99,102,241,0.08);
  opacity: 0; visibility: hidden;
  transform: translateY(16px);
  pointer-events: none;
  transition: opacity 0.35s cubic-bezier(0.22, 1, 0.36, 1),
              visibility 0.35s,
              transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}
.wechat-card-overlay.open .wechat-card {
  opacity: 1; visibility: visible; transform: translateY(0); pointer-events: auto;
}

/* 关闭按钮 */
.wechat-card-close {
  position: absolute; top: 14px; right: 14px; z-index: 3;
  width: 30px; height: 30px; border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.05); color: rgba(255,255,255,0.5);
  font-size: 14px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.3s;
}
.wechat-card-close:hover { background: rgba(239,68,68,0.15); border-color: rgba(239,68,68,0.35); color: #FCA5A5; transform: rotate(90deg); }

/* 顾问头部 */
.wechat-card-header { display: flex; align-items: center; gap: 12px; padding: 20px 22px 12px; }
.wechat-avatar {
  position: relative; flex-shrink: 0;
  width: 44px; height: 44px; border-radius: 50%;
  background: linear-gradient(135deg, #667eea, #764ba2);
  display: flex; align-items: center; justify-content: center;
}
.wechat-avatar-text { font-size: 18px; font-weight: 700; color: #fff; line-height: 1; }
.wechat-avatar-dot {
  position: absolute; bottom: 1px; right: 1px;
  width: 10px; height: 10px; border-radius: 50%;
  background: #22c55e; border: 2px solid #151d30;
}
.wechat-advisor-info { flex: 1; min-width: 0; }
.wechat-advisor-row { display: flex; align-items: center; gap: 8px; margin-bottom: 3px; }
.wechat-advisor-name { font-size: 14px; font-weight: 600; color: #E2E8F0; }
.wechat-advisor-badge {
  font-size: 10px; font-weight: 600; padding: 2px 8px; border-radius: 10px;
  background: rgba(34,197,94,0.15); color: #22c55e;
  border: 1px solid rgba(34,197,94,0.25);
}
.wechat-advisor-sub { font-size: 11px; color: rgba(148,163,184,0.7); margin: 0; }

/* 欢迎消息气泡 */
.wechat-msg-bubble {
  margin: 6px 22px 12px; padding: 14px 16px;
  background: rgba(99,102,241,0.08); border: 1px solid rgba(99,102,241,0.15);
  border-radius: 14px; border-top-left-radius: 4px;
}
.wechat-msg-bubble p { margin: 0; font-size: 12.5px; color: #CBD5E1; line-height: 1.7; }
.wechat-msg-highlight { color: #818CF8; font-weight: 600; }

/* 快捷按钮 */
.wechat-quick-btns { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; padding: 0 22px 14px; }
.wechat-quick-btn {
  padding: 10px 0; border-radius: 10px;
  border: 1px solid rgba(99,102,241,0.2);
  background: rgba(99,102,241,0.06); color: #CBD5E1;
  font-size: 13px; font-weight: 500; cursor: pointer;
  transition: all 0.25s; font-family: inherit;
}
.wechat-quick-btn:hover {
  background: rgba(99,102,241,0.18); border-color: rgba(129,140,248,0.45);
  color: #fff; box-shadow: 0 0 14px rgba(99,102,241,0.15);
}

/* 二维码区域 */
.wechat-qr-section {
  display: flex; gap: 14px; align-items: center;
  margin: 0 22px 14px; padding: 14px;
  border-radius: 14px; background: rgba(255,255,255,0.025);
  border: 1px solid rgba(255,255,255,0.06);
}
.wechat-qr-code {
  flex-shrink: 0; width: 110px; height: 110px;
  border-radius: 10px; overflow: hidden; background: #fff;
  box-shadow: 0 0 0 2px rgba(99,102,241,0.15);
}
.wechat-qr-code img { width: 100%; height: 100%; object-fit: contain; }
.wechat-qr-info { flex: 1; min-width: 0; }
.wechat-qr-title { font-size: 13px; font-weight: 600; color: #E2E8F0; margin: 0 0 4px; }
.wechat-qr-desc { font-size: 11px; color: #94A3B8; margin: 0 0 6px; }
.wechat-qr-desc strong { color: #818CF8; }
.wechat-qr-safe { font-size: 10px; color: rgba(148,163,184,0.6); margin: 0; }

/* 底部统计 */
.wechat-card-footer {
  display: flex; gap: 20px; margin: 0 22px 18px;
  padding: 12px 14px; border-radius: 12px;
  background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.05);
}
.wechat-stat { flex: 1; text-align: center; }
.wechat-stat-num {
  display: block; font-size: 18px; font-weight: 700;
  background: linear-gradient(135deg, #818CF8, #A78BFA);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.wechat-stat-label { font-size: 10px; color: rgba(148,163,184,0.55); }