/* ============================================================
   淄博阿尔法电气有限公司 - 官网样式
   风格：深蓝科技感，参考雅迅智联
============================================================ */

/* ---------- CSS 变量 ---------- */
:root {
  --blue-dark:  #001A33;
  --blue-main:  #003580;
  --blue-mid:   #007BFF;
  --blue-light: #00A0E9;
  --blue-primary: #00A0E9;
  --blue-pale:  #e8f2ff;
  --accent:     #ff6b00;
  --accent2:    #00d4aa;
  --white:      #ffffff;
  --gray-100:   #F5F5F5;
  --gray-200:   #EEEEEE;
  --gray-400:   #9ca3af;
  --gray-600:   #4b5563;
  --gray-800:   #1f2937;
  --text:       #1a2940;
  --text-light: #6b7a90;
  --shadow-sm:  0 2px 8px rgba(0,0,0,.1);
  --shadow-md:  0 8px 32px rgba(0,0,0,.12);
  --shadow-lg:  0 20px 60px rgba(0,0,0,.18);
  --radius:     8px;
  --radius-sm:  4px;
  --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: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

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

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 28px;
  border-radius: 50px;
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}
.btn-primary {
  background: linear-gradient(135deg, #007BFF, #0056B3);
  color: #fff;
  box-shadow: 0 4px 20px rgba(0,123,255,.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0,123,255,.5);
}
.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,.6);
}
.btn-outline:hover {
  background: rgba(255,255,255,.1);
  border-color: #fff;
}
.btn-full { width: 100%; justify-content: center; }

/* ---------- 通用 section 头部 ---------- */
.section-header {
  text-align: center;
  margin-bottom: 56px;
}
.section-tag {
  display: inline-block;
  background: var(--blue-pale);
  color: var(--blue-mid);
  padding: 4px 16px;
  border-radius: 50px;
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .06em;
  margin-bottom: 16px;
  border: 1px solid rgba(0,87,200,.15);
}
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 14px;
  line-height: 1.3;
}
.section-desc {
  font-size: 1rem;
  color: var(--text-light);
  max-width: 560px;
  margin: 0 auto;
}
.solutions .section-header.light .section-tag { background: rgba(0,123,255,.1); color: #007BFF; border-color: rgba(0,123,255,.2); }
.solutions .section-header.light .section-title { color: var(--text); }
.solutions .section-header.light .section-desc { color: var(--text-light); }

/* ================================================================
   HEADER
================================================================ */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0;
  transition: background var(--transition), box-shadow var(--transition), padding var(--transition);
}
.header.scrolled {
  background: #fff;
  box-shadow: 0 2px 20px rgba(0,0,0,.08);
  padding: 0;
}
.header {
  background: transparent;
}
.header.scrolled .logo-main { color: #1a1a1a; }
.header.scrolled .logo-sub { color: #888; }
.header.scrolled .nav-link { color: #333; }
.header.scrolled .nav-link:hover,
.header.scrolled .nav-link.active {
  color: var(--blue-primary);
}
.header.scrolled .nav-link::after {
  background: var(--blue-primary);
}
.header.scrolled .has-dropdown:hover > .nav-link {
  color: var(--blue-primary);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

/* Logo */
.logo a { display: flex; align-items: center; gap: 12px; }
.logo-icon {
  width: 44px; height: 44px;
  background: transparent;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.logo-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 2px;
}

/* CSS 绘制的 Alpha 标志 */
.css-logo {
  background: linear-gradient(135deg, #0057c8, #1e8eff);
}
.alpha-a {
  position: relative;
  width: 32px;
  height: 32px;
}
.a-left {
  position: absolute;
  left: 2px;
  top: 0;
  width: 0;
  height: 0;
  border-left: 10px solid transparent;
  border-right: 6px solid transparent;
  border-bottom: 28px solid #fff;
  transform: skewX(-8deg);
}
.a-right {
  position: absolute;
  right: 2px;
  top: 0;
  width: 0;
  height: 0;
  border-left: 6px solid transparent;
  border-right: 10px solid transparent;
  border-bottom: 28px solid #fff;
  transform: skewX(8deg);
}
.a-cross {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) rotate(-30deg);
  width: 28px;
  height: 3px;
  background: linear-gradient(135deg, #0057c8, #1e8eff);
  border-radius: 1.5px;
}
.alpha-a::before {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 4px;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 8px solid #0057c8;
}
.logo-text { display: flex; flex-direction: column; }
.logo-main {
  font-size: .98rem; font-weight: 700; color: #fff;
  line-height: 1.3; letter-spacing: .02em;
}
.logo-sub { font-size: .62rem; color: rgba(255,255,255,.55); letter-spacing: .05em; }

/* Nav */
.nav-list { display: flex; align-items: center; gap: 4px; }
.nav-link {
  display: block; padding: 8px 16px;
  font-size: .9rem; font-weight: 500; color: rgba(255,255,255,.85);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute; bottom: 4px; left: 50%; transform: translateX(-50%);
  width: 0; height: 2px;
  background: var(--blue-light);
  border-radius: 2px;
  transition: width var(--transition);
}
.nav-link:hover, .nav-link.active { color: #fff; }
.nav-link:hover::after, .nav-link.active::after { width: 60%; }
/* 下拉菜单展开时，父级导航也高亮 */
.has-dropdown:hover > .nav-link { color: #fff; }
.has-dropdown:hover > .nav-link::after { width: 60%; }

/* Dropdown */
.has-dropdown { position: relative; }
.dropdown {
  position: absolute; top: calc(100% + 8px); left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: rgba(0,26,58,.97);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius);
  padding: 8px;
  min-width: 180px;
  opacity: 0; visibility: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow-lg);
}
.has-dropdown:hover .dropdown { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.dropdown li a {
  display: block; padding: 9px 16px;
  font-size: .88rem; color: rgba(255,255,255,.75);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.dropdown li a:hover { background: rgba(255,255,255,.08); color: #fff; }

/* 汉堡按钮 */
.menu-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.menu-toggle span {
  display: block; width: 24px; height: 2px;
  background: #fff; border-radius: 2px;
  transition: var(--transition);
}

/* ================================================================
   BANNER
================================================================ */
.banner {
  min-height: 100vh;
  background: linear-gradient(180deg, #001A33 0%, #000000 100%);
  position: relative;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.banner-bg {
  position: absolute; inset: 0; pointer-events: none;
}
.banner-bg::before {
  content: '';
  position: absolute; inset: 0;
  background: url('images/office.jpg') center/cover no-repeat;
  opacity: .75;
}
.banner-bg::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(0,26,58,.55) 0%, rgba(0,10,30,.65) 100%);
}
.banner-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 60px 60px;
}
.banner-particles {
  position: absolute; inset: 0;
}
.banner-particles::before, .banner-particles::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: .25;
}
.banner-particles::before {
  width: 500px; height: 500px;
  background: radial-gradient(circle, var(--blue-light), transparent);
  top: -100px; right: -100px;
}
.banner-particles::after {
  width: 400px; height: 400px;
  background: radial-gradient(circle, var(--blue-mid), transparent);
  bottom: -80px; left: 10%;
}

.banner .container {
  display: flex; align-items: center; gap: 60px;
  padding-top: 80px;
  position: relative; z-index: 1;
}
.banner-content { flex: 1; max-width: 600px; }

.banner-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(30,142,255,.15);
  border: 1px solid rgba(30,142,255,.3);
  color: var(--blue-light); padding: 6px 16px;
  border-radius: 50px; font-size: .82rem; font-weight: 500;
  margin-bottom: 24px;
}
.badge-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--blue-light);
  box-shadow: 0 0 8px var(--blue-light);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .5; transform: scale(1.3); }
}

.banner-title {
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 800; color: #fff; line-height: 1.25;
  margin-bottom: 20px;
}
.banner-title .highlight {
  background: linear-gradient(135deg, #60b4ff, #00d4aa);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.banner-desc {
  font-size: 1.05rem; color: rgba(255,255,255,.72);
  line-height: 1.8; margin-bottom: 36px;
}

/* 统计数字 */
.banner-stats {
  display: flex; align-items: center; gap: 0;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius);
  padding: 20px 24px; margin-bottom: 36px;
}
.stat-item { flex: 1; text-align: center; }
.stat-num {
  font-size: 2rem; font-weight: 800; color: #fff;
  font-variant-numeric: tabular-nums;
}
.stat-unit { font-size: 1.1rem; color: var(--blue-light); font-weight: 700; }
.stat-label { display: block; font-size: .8rem; color: rgba(255,255,255,.55); margin-top: 2px; }
.stat-divider { width: 1px; height: 40px; background: rgba(255,255,255,.12); }

.banner-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* Banner 右侧可视化 */
.banner-visual {
  flex: 0 0 400px;
  position: relative; height: 400px;
}
.visual-card {
  position: absolute;
  background: rgba(255,255,255,.06);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius);
  padding: 16px 20px;
  display: flex; align-items: center; gap: 12px;
  transition: var(--transition);
}
.visual-card:hover { transform: translateY(-4px); background: rgba(255,255,255,.1); }
.card-main { top: 20px; left: 20px; right: 20px; }
.card-sub1 { top: 130px; left: 0; width: 220px; }
.card-sub2 { top: 210px; right: 0; width: 220px; }
.card-icon { font-size: 1.5rem; }
.card-info { flex: 1; }
.card-title { display: block; font-size: .9rem; font-weight: 600; color: #fff; }
.card-desc { display: block; font-size: .75rem; color: rgba(255,255,255,.55); }
.card-status { font-size: .72rem; padding: 3px 10px; border-radius: 50px; font-weight: 600; }
.card-status.online { background: rgba(0,212,170,.2); color: var(--accent2); border: 1px solid rgba(0,212,170,.3); }

/* 轨道动画 */
.visual-orbit {
  position: absolute; bottom: 0; right: 0;
  width: 220px; height: 220px;
  display: flex; align-items: center; justify-content: center;
}
.orbit-ring {
  position: absolute; border-radius: 50%;
  border: 1px solid rgba(30,142,255,.2);
}
.ring1 { width: 180px; height: 180px; animation: spin 15s linear infinite; }
.ring2 { width: 130px; height: 130px; border-style: dashed; animation: spin 10s linear infinite reverse; }
.orbit-dot {
  position: absolute; width: 8px; height: 8px; border-radius: 50%;
  background: var(--blue-light);
  box-shadow: 0 0 10px var(--blue-light);
}
.dot1 { top: 10px; animation: orbit 15s linear infinite; }
.dot2 { top: 35px; animation: orbit 10s linear infinite reverse; }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes orbit { to { transform: rotate(360deg) translateX(90px) rotate(-360deg); } }
.orbit-center {
  width: 60px; height: 60px;
  background: linear-gradient(135deg, var(--blue-mid), var(--blue-light));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; color: #fff; font-weight: 900;
  box-shadow: 0 0 30px rgba(30,142,255,.5);
  z-index: 2;
}

/* 向下滚动提示 */
.scroll-hint {
  position: absolute; bottom: 36px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  color: rgba(255,255,255,.45); font-size: .78rem;
  animation: float 2.5s ease-in-out infinite;
}
.scroll-arrow {
  width: 20px; height: 20px;
  border-right: 2px solid rgba(255,255,255,.45);
  border-bottom: 2px solid rgba(255,255,255,.45);
  transform: rotate(45deg);
}
@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ================================================================
   HIGHLIGHTS
================================================================ */
.highlights {
  background: var(--white);
  padding: 0;
  box-shadow: var(--shadow-md);
  position: relative; z-index: 2;
}
.highlights-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: none;
  background: var(--white);
}
.highlight-item {
  display: flex; align-items: center; gap: 14px;
  padding: 28px 24px;
  border-right: 1px solid var(--gray-200);
  transition: var(--transition);
}
.highlight-item:last-child { border-right: none; }
.highlight-item:hover { background: var(--blue-pale); }
.hi-icon { font-size: 1.8rem; flex-shrink: 0; }
.hi-text { display: flex; flex-direction: column; }
.hi-text strong { font-size: .95rem; font-weight: 700; color: var(--text); }
.hi-text span { font-size: .8rem; color: var(--text-light); }

/* ================================================================
   ABOUT
================================================================ */
.about {
  padding: 100px 0;
  background: var(--white);
  position: relative;
  overflow: hidden;
}
.about::before {
  content: '';
  position: absolute; top: -120px; right: -120px;
  width: 480px; height: 480px;
  background: radial-gradient(circle, rgba(0,87,200,.06), transparent 70%);
  border-radius: 50%;
}
.about-layout {
  display: grid; grid-template-columns: 1fr 1.3fr; gap: 80px; align-items: center;
}

/* About 左侧图 */
.about-img-wrap { position: relative; }
.about-img-placeholder {
  aspect-ratio: 1;
  max-width: 380px;
  background: linear-gradient(135deg, var(--blue-dark), var(--blue-main));
  border-radius: 24px;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 12px;
  box-shadow: var(--shadow-lg);
}
.about-img-placeholder .img-icon { font-size: 4rem; }
.about-img-placeholder span { color: #fff; font-size: 1.2rem; font-weight: 700; }
.about-img-placeholder small { color: rgba(255,255,255,.55); font-size: .85rem; }

.about-badge-float {
  position: absolute;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 14px 18px;
  display: flex; align-items: center; gap: 8px;
  font-weight: 700;
  animation: float 3s ease-in-out infinite;
}
.badge-year {
  bottom: -20px; right: -30px;
  flex-direction: column; text-align: center;
}
.badge-big { font-size: 2rem; color: var(--blue-mid); line-height: 1; }
.badge-small { font-size: .78rem; color: var(--text-light); }
.badge-cert { top: -16px; left: -20px; font-size: .85rem; color: var(--text); animation-delay: 1.2s; }

/* About 右侧内容 */
.about-intro p {
  font-size: .95rem; color: var(--gray-600); margin-bottom: 14px; line-height: 1.9;
}
.about-intro strong { color: var(--blue-mid); }
.about-features {
  display: grid; grid-template-columns: 1fr 1fr; gap: 14px;
  margin: 28px 0;
}
.af-item {
  display: flex; align-items: flex-start; gap: 10px;
  background: #fff; border-radius: var(--radius-sm);
  padding: 14px; border: 1px solid var(--gray-200);
  transition: var(--transition);
}
.af-item:hover { border-color: var(--blue-light); box-shadow: var(--shadow-sm); }
.af-icon { font-size: 1.1rem; margin-top: 1px; }
.af-text { display: flex; flex-direction: column; }
.af-text strong { font-size: .88rem; font-weight: 700; color: var(--text); }
.af-text span { font-size: .78rem; color: var(--text-light); }

/* ================================================================
   HONOR
================================================================ */
.honor { padding: 80px 0; background: #f8f9fb; }
.honor-wrap {
  overflow: hidden;
  padding: 12px 0;
  margin-top: 48px;
  position: relative;
}
.honor-wrap::before, .honor-wrap::after {
  content: '';
  position: absolute; top:0; bottom:0; width: 80px; z-index: 2;
}
.honor-wrap::before { left:0; background: linear-gradient(to right, #f8f9fb, transparent); }
.honor-wrap::after { right:0; background: linear-gradient(to left, #f8f9fb, transparent); }
.honor-track {
  display: flex;
  gap: 24px;
  animation: marquee 30s linear infinite;
  width: max-content;
}
.honor-track:hover { animation-play-state: paused; }
.honor-item {
  background: #fff;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0,0,0,.06);
  text-align: center;
  transition: transform .3s, box-shadow .3s;
  min-width: 240px;
}
.honor-item:hover { transform: translateY(-4px); box-shadow: 0 8px 28px rgba(0,0,0,.1); }
.honor-item img {
  width: 100%;
  height: 200px;
  object-fit: contain;
  display: block;
  padding: 16px;
  border-bottom: 1px solid #f0f0f0;
}
.honor-item span {
  display: block;
  padding: 14px 12px;
  font-size: .95rem;
  color: #333;
  font-weight: 500;
}
@media (max-width: 768px) {
  .honor-item { min-width: 180px; }
  .honor-item img { height: 150px; }
  .honor-item span { font-size: .85rem; padding: 10px 8px; }
}

/* ================================================================
   SOLUTIONS
================================================================ */
.solutions {
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}
.solutions-bg {
  position: absolute; inset: 0;
  background: var(--gray-100);
}
.solutions .container { position: relative; z-index: 1; }

.solutions-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
}
.solution-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: var(--transition);
  display: flex; flex-direction: column;
  box-shadow: var(--shadow-sm);
}
.solution-card:hover {
  transform: translateY(-6px);
  border-color: #00A0E9;
  box-shadow: var(--shadow-md);
}
.solution-card.featured {
  background: var(--white);
  border-color: #007BFF;
}
.sc-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 16px;
}
.sc-icon { font-size: 2rem; }
.sc-badge {
  font-size: .72rem; font-weight: 700;
  background: linear-gradient(135deg, var(--blue-mid), var(--blue-light));
  color: #fff; padding: 3px 10px; border-radius: 50px;
}
.solution-card h3 {
  font-size: 1rem; font-weight: 700; color: var(--text);
  margin-bottom: 12px; line-height: 1.4;
}
.solution-card p { font-size: .85rem; color: var(--text-light); line-height: 1.75; margin-bottom: 16px; }
.sc-features {
  flex: 1; margin-bottom: 20px;
}
.sc-features li {
  font-size: .82rem; color: var(--gray-600);
  padding: 5px 0;
  border-bottom: 1px solid var(--gray-200);
  display: flex; align-items: center; gap: 8px;
}
.sc-features li::before { content: '›'; color: #007BFF; font-weight: 700; }
.sc-link {
  font-size: .85rem; font-weight: 600; color: #007BFF;
  transition: var(--transition);
}
.sc-link:hover { color: #0056B3; }
.platform-card { border-color: #00A0E9; }
.platform-card .sc-icon { font-size: 1.8rem; }
.sc-link-primary {
  display: inline-block;
  margin-top: auto;
  padding: 10px 20px;
  background: linear-gradient(135deg, #003580, #00A0E9);
  color: #fff !important;
  border-radius: 6px;
  font-size: .88rem;
  font-weight: 600;
  transition: all .3s;
}
.sc-link-primary:hover {
  background: linear-gradient(135deg, #002060, #0077c2);
  box-shadow: 0 4px 16px rgba(0,80,180,.3);
  transform: translateY(-1px);
}

/* ================================================================
   PROCESS
================================================================ */
.process { padding: 80px 0; background: var(--white); }
.process-steps {
  display: flex; align-items: flex-start; gap: 0;
  justify-content: center; flex-wrap: wrap;
}
.step {
  flex: 1; min-width: 140px; max-width: 180px;
  text-align: center; padding: 28px 16px;
  position: relative;
}
.step-num {
  position: absolute; top: 16px; left: 16px;
  font-size: .72rem; font-weight: 800;
  color: rgba(0,87,200,.2); letter-spacing: .05em;
}
.step-icon {
  width: 64px; height: 64px;
  background: var(--blue-pale);
  border: 2px solid rgba(0,87,200,.15);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; margin: 0 auto 14px;
  transition: var(--transition);
}
.step:hover .step-icon {
  background: var(--blue-mid);
  border-color: var(--blue-mid);
  box-shadow: 0 8px 24px rgba(0,87,200,.3);
}
.step h4 { font-size: .9rem; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.step p { font-size: .8rem; color: var(--text-light); }
.step-arrow {
  flex-shrink: 0; font-size: 1.4rem;
  color: var(--blue-mid); margin-top: 50px;
  opacity: .4;
}

/* ================================================================
   CASES / PARTNERS
================================================================ */
.cases { padding: 100px 0; background: var(--gray-100); overflow: hidden; }

/* 滚动合作伙伴 */
.partners-wrap {
  overflow: hidden;
  padding: 12px 0;
  margin-bottom: 48px;
  position: relative;
}
.partners-wrap::before, .partners-wrap::after {
  content: '';
  position: absolute; top: 0; bottom: 0; width: 100px; z-index: 2;
}
.partners-wrap::before { left: 0; background: linear-gradient(to right, var(--gray-100), transparent); }
.partners-wrap::after { right: 0; background: linear-gradient(to left, var(--gray-100), transparent); }

.partners-track {
  display: flex; gap: 24px;
  animation: marquee 30s linear infinite;
  width: max-content;
}
.partners-track:hover { animation-play-state: paused; }
@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}
.partner-item {
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  background: #fff; border-radius: var(--radius);
  padding: 20px 24px; min-width: 160px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
  transition: var(--transition);
}
.partner-item:hover { border-color: var(--blue-light); box-shadow: var(--shadow-md); }
.partner-logo {
  width: 56px; height: 56px; border-radius: 12px;
  background: linear-gradient(135deg, var(--blue-main), var(--blue-mid));
  display: flex; align-items: center; justify-content: center;
}
.partner-abbr { font-size: .75rem; color: #fff; font-weight: 700; text-align: center; }
.partner-name { font-size: .75rem; color: var(--text-light); text-align: center; max-width: 120px; }

/* Cases 卡片 */
.cases-highlight { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.case-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px;
  border: 1px solid var(--gray-200);
  display: flex; gap: 20px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.case-card:hover { border-color: var(--blue-light); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.cc-icon { font-size: 2.4rem; flex-shrink: 0; }
.cc-content h4 { font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.cc-content p { font-size: .85rem; color: var(--text-light); line-height: 1.75; margin-bottom: 14px; }
.cc-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.cc-tags span {
  font-size: .75rem; padding: 3px 12px;
  background: var(--blue-pale);
  color: var(--blue-mid);
  border-radius: 50px; font-weight: 600;
}

/* ================================================================
   NEWS
================================================================ */
.news {
  padding: 100px 0;
  position: relative; overflow: hidden;
}
.news-bg {
  position: absolute; inset: 0;
  background: var(--gray-100);
}
.news .container { position: relative; z-index: 1; }

.news-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 32px; }

.featured-news {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}
.featured-news:hover { border-color: #00A0E9; transform: translateY(-4px); box-shadow: var(--shadow-md); }
.news-img { position: relative; }
.news-img img {
  width: 90%; height: auto; max-height: 220px; object-fit: contain; display: block; margin: 12px auto;
}
.news-img-placeholder {
  height: 200px;
  background: linear-gradient(135deg, rgba(0,123,255,.1), rgba(0,160,233,.1));
  display: flex; align-items: center; justify-content: center;
  font-size: 3rem;
}
.news-date {
  position: absolute; bottom: 12px; left: 16px;
  background: #007BFF; color: #fff;
  font-size: .78rem; font-weight: 700;
  padding: 4px 12px; border-radius: 50px;
}
.news-body { padding: 24px; }
.news-tag {
  display: inline-block;
  font-size: .75rem; color: #007BFF;
  background: rgba(0,123,255,.1); border: 1px solid rgba(0,123,255,.2);
  padding: 2px 12px; border-radius: 50px; margin-bottom: 12px; font-weight: 600;
}
.news-body h3 { font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: 10px; line-height: 1.5; }
.news-body p { font-size: .85rem; color: var(--text-light); line-height: 1.75; margin-bottom: 16px; }
.news-more { font-size: .85rem; color: #007BFF; font-weight: 600; transition: var(--transition); }
.news-more:hover { color: #0056B3; }

.news-list { display: flex; flex-direction: column; gap: 16px; }
.news-item {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 20px;
  display: flex; gap: 16px;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}
.news-item:hover { border-color: #00A0E9; box-shadow: var(--shadow-md); }
.ni-date {
  flex-shrink: 0; text-align: center;
  background: rgba(0,123,255,.1);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
}
.ni-day { font-size: 1.4rem; font-weight: 800; color: #007BFF; line-height: 1; }
.ni-mon { font-size: .7rem; color: var(--text-light); margin-top: 4px; }
.ni-tag {
  display: inline-block; font-size: .72rem; color: #00A0E9;
  background: rgba(0,160,233,.1); border: 1px solid rgba(0,160,233,.2);
  padding: 1px 10px; border-radius: 50px; margin-bottom: 6px; font-weight: 600;
}
.ni-content h4 { font-size: .88rem; font-weight: 700; color: var(--text); margin-bottom: 6px; line-height: 1.5; }
.ni-content p { font-size: .8rem; color: var(--text-light); line-height: 1.65; }

/* ================================================================
   CONTACT
================================================================ */
.contact { padding: 100px 0; background: var(--white); }
.contact-layout { display: grid; grid-template-columns: 1fr 1.5fr; gap: 60px; align-items: start; }

.contact-info { display: flex; flex-direction: column; gap: 24px; }
.ci-item {
  display: flex; align-items: flex-start; gap: 16px;
  background: var(--gray-100);
  border-radius: var(--radius);
  padding: 20px;
  border: 1px solid var(--gray-200);
  transition: var(--transition);
}
.ci-item:hover { border-color: var(--blue-light); background: var(--blue-pale); }
.ci-icon { font-size: 1.4rem; flex-shrink: 0; }
.ci-text { display: flex; flex-direction: column; }
.ci-text strong { font-size: .9rem; font-weight: 700; color: var(--text); margin-bottom: 3px; }
.ci-text span { font-size: .88rem; color: var(--text-light); }

.contact-form {
  background: var(--gray-100);
  border-radius: var(--radius);
  padding: 36px;
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block; font-size: .85rem; font-weight: 600;
  color: var(--text); margin-bottom: 8px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-family: inherit; font-size: .9rem; color: var(--text);
  background: #fff;
  transition: var(--transition);
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--blue-light);
  box-shadow: 0 0 0 3px rgba(30,142,255,.12);
}
.form-group textarea { resize: vertical; min-height: 100px; }

/* ================================================================
   FOOTER
================================================================ */
.footer { background: var(--blue-dark); }
.footer-top { padding: 60px 0 40px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 48px; }

.footer-brand .logo-main { font-size: 1rem; }
.footer-brand-desc {
  font-size: .85rem; color: rgba(255,255,255,.5);
  margin: 16px 0; line-height: 1.8;
}
.footer-cert { display: flex; gap: 10px; flex-wrap: wrap; }
.cert-badge {
  font-size: .75rem;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);
  color: rgba(255,255,255,.6);
  padding: 5px 12px; border-radius: 50px;
}

.footer-links h4, .footer-contact h4 {
  font-size: .9rem; font-weight: 700; color: #fff;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.footer-links ul { display: flex; flex-direction: column; gap: 10px; }
.footer-links a {
  font-size: .85rem; color: rgba(255,255,255,.5);
  transition: var(--transition);
}
.footer-links a:hover { color: var(--blue-light); padding-left: 4px; }

.footer-contact .fc-item {
  font-size: .85rem; color: rgba(255,255,255,.5);
  margin-bottom: 10px; display: flex; align-items: center; gap: 8px;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 18px 0;
}
.footer-bottom .container {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 12px;
}
.footer-bottom span { font-size: .8rem; color: rgba(255,255,255,.6); }
.footer-bottom a { color: rgba(255,255,255,.6); text-decoration: none; transition: color .3s; }
.footer-bottom a:hover { color: rgba(255,255,255,.9); }
.footer-admin-link {
  margin-left: 16px;
  padding-left: 16px;
  border-left: 1px solid rgba(255,255,255,.2);
  font-size: .75rem;
  color: rgba(255,255,255,.45);
  text-decoration: none;
  transition: color .3s;
}
.footer-admin-link:hover { color: rgba(255,255,255,.8); }

/* ================================================================
   回到顶部
================================================================ */
.back-to-top {
  position: fixed; bottom: 40px; right: 40px;
  width: 44px; height: 44px;
  background: var(--blue-mid);
  color: #fff; border: none; border-radius: 50%;
  font-size: 1.1rem; cursor: pointer;
  box-shadow: var(--shadow-md);
  opacity: 0; transform: translateY(20px);
  transition: var(--transition);
  z-index: 999;
}
.back-to-top.visible { opacity: 1; transform: translateY(0); }
.back-to-top:hover { background: var(--blue-light); transform: translateY(-3px); }

/* ================================================================
   进入动画
================================================================ */
.fade-up {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity .7s ease, transform .7s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ================================================================
   响应式
================================================================ */
@media (max-width: 1024px) {
  .solutions-grid { grid-template-columns: 1fr 1fr; }
  .banner .container { gap: 40px; }
  .banner-visual { flex: 0 0 300px; height: 300px; }
}

@media (max-width: 900px) {
  .about-layout { grid-template-columns: 1fr; gap: 48px; }
  .about-img-placeholder { max-width: 100%; height: 240px; }
  .news-grid { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .highlights-grid { grid-template-columns: 1fr 1fr; }
  .highlight-item { border-bottom: 1px solid var(--gray-200); }
  .cases-highlight { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  /* 移动端导航 */
  .nav {
    position: fixed; top: 72px; left: 0; right: 0;
    background: rgba(0,26,58,.97);
    backdrop-filter: blur(12px);
    padding: 16px;
    max-height: 0; overflow: hidden;
    transition: max-height .35s ease;
  }
  .nav.open { max-height: 500px; }
  .nav-list { flex-direction: column; align-items: stretch; gap: 4px; }
  .nav-link { padding: 12px 16px; }
  .dropdown { position: static; transform: none; opacity: 1; visibility: visible; background: rgba(255,255,255,.04); box-shadow: none; }
  .menu-toggle { display: flex; }

  .banner .container { flex-direction: column; padding-top: 100px; text-align: center; }
  .banner-visual { display: none; }
  .banner-stats { flex-wrap: wrap; }
  .stat-divider { display: none; }
  .stat-item { min-width: 45%; }
  .banner-actions { justify-content: center; }

  .solutions-grid { grid-template-columns: 1fr; }
  .process-steps { flex-direction: column; align-items: center; }
  .step-arrow { transform: rotate(90deg); margin-top: 0; }

  .footer-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }

  .about-features { grid-template-columns: 1fr; }
  .highlights-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .banner-title { font-size: 1.8rem; }
  .contact-form { padding: 24px 16px; }
  .back-to-top { bottom: 20px; right: 20px; }
}