/* ============================================================
   熊猫智创 Panda Innovation — 官网样式
   设计基调：深空底 + 熊猫黑白 + 科技渐变（青→紫）
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
  /* 背景层次 */
  --bg-0: #06070b;
  --bg-1: #0a0c12;
  --bg-2: #10131c;
  --bg-3: #171b26;

  /* 文本 */
  --tx-1: #f2f5f9;
  --tx-2: #a8b0c0;
  --tx-3: #6b7488;
  --tx-4: #444c5e;

  /* 品牌 */
  --brand: #ffffff;
  --ink: #05060a;

  /* 渐变 */
  --g1: #38bdf8;
  --g2: #6366f1;
  --g3: #8b5cf6;
  --g4: #22d3ee;
  --grad: linear-gradient(120deg, #38bdf8 0%, #6366f1 50%, #a855f7 100%);
  --grad-soft: linear-gradient(120deg, rgba(56,189,248,.16), rgba(139,92,246,.16));

  /* 边框与玻璃 */
  --bd: rgba(255,255,255,.09);
  --bd-2: rgba(255,255,255,.14);
  --glass: rgba(255,255,255,.035);
  --glass-2: rgba(255,255,255,.06);

  /* 尺寸 */
  --wrap: 1240px;
  --r: 16px;
  --r-lg: 22px;

  /* 阴影 */
  --sh: 0 20px 60px rgba(0,0,0,.45);
  --sh-glow: 0 0 60px rgba(99,102,241,.28);

  /* 缓动 */
  --ease: cubic-bezier(.22,1,.36,1);
}

/* ---------- 基础 ---------- */
* { margin:0; padding:0; box-sizing:border-box; }

html {
  scroll-behavior:smooth;
  scroll-padding-top:80px;
  -webkit-text-size-adjust:100%;
  /* 移动端侧滑菜单（position:fixed + translateX 推出屏外）会计入
     scrollWidth，导致横向可滚动。此处在根元素裁掉。 */
  overflow-x:hidden;
}

body {
  background: var(--bg-0);
  color: var(--tx-1);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB',
               'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  /* 光晕等装饰元素绝对定位后仍会计入 scrollWidth，
     视口宽度封顶可彻底杜绝横向滚动条 */
  max-width: 100vw;
}

img { max-width:100%; display:block; }
a { color:inherit; text-decoration:none; }
ul { list-style:none; }
button, input, select, textarea { font-family:inherit; font-size:inherit; color:inherit; }

::selection { background: rgba(99,102,241,.4); color:#fff; }

/* 滚动条 */
::-webkit-scrollbar { width:10px; }
::-webkit-scrollbar-track { background: var(--bg-0); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(var(--g1), var(--g3));
  border-radius: 10px;
  border: 2px solid var(--bg-0);
}

/* ---------- 布局 ---------- */
.wrap { width:100%; max-width: var(--wrap); margin:0 auto; padding:0 32px; }

.sec { position:relative; padding: 120px 0; }

.eyebrow {
  display:inline-block;
  font-size:12px;
  font-weight:600;
  letter-spacing:.18em;
  color: var(--g1);
  text-transform: uppercase;
  margin-bottom:18px;
  font-family:'JetBrains Mono', monospace;
}

.sec-title {
  font-size: clamp(30px, 4vw, 50px);
  line-height:1.22;
  font-weight:700;
  letter-spacing:-.02em;
  margin-bottom:24px;
  background: linear-gradient(180deg, #fff 30%, rgba(255,255,255,.62) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.sec-desc {
  font-size: 16.5px;
  color: var(--tx-2);
  max-width: 680px;
  line-height: 1.9;
}
.sec-desc.center { margin-left:auto; margin-right:auto; text-align:center; }

.sec-head { text-align:center; margin-bottom: 68px; }
.sec-head .eyebrow { margin-bottom:14px; }
.sec-head .sec-title { margin-bottom:20px; }

/* ---------- 滚动进度 ---------- */
.progress {
  position: fixed; top:0; left:0; height:2px; width:0;
  background: var(--grad);
  z-index: 200;
  box-shadow: 0 0 12px rgba(99,102,241,.8);
  transition: width .1s linear;
}

/* ---------- 导航 ---------- */
.nav {
  position: fixed; top:0; left:0; right:0; z-index: 100;
  padding: 20px 0;
  transition: all .4s var(--ease);
}
.nav.scrolled {
  background: rgba(8,10,15,.78);
  backdrop-filter: blur(22px) saturate(160%);
  -webkit-backdrop-filter: blur(22px) saturate(160%);
  border-bottom: 1px solid var(--bd);
  padding: 12px 0;
}

.nav-inner {
  max-width: var(--wrap); margin: 0 auto; padding: 0 32px;
  display: flex; align-items: center; gap: 24px;
}

.brand { display:flex; align-items:center; gap:12px; flex-shrink:0; }
.brand img { width:40px; height:40px; transition: transform .4s var(--ease); }
.brand:hover img { transform: rotate(-8deg) scale(1.06); }
.brand-text { display:flex; flex-direction:column; line-height:1.2; }
.brand-text strong { font-size:17px; font-weight:700; letter-spacing:.02em; }
.brand-text em {
  font-style:normal; font-size:9px; letter-spacing:.22em;
  color: var(--tx-3); font-family:'JetBrains Mono', monospace;
}

.nav-links { display:flex; align-items:center; gap:4px; margin-left:auto; }
.nav-links a {
  position:relative;
  padding: 8px 14px;
  font-size:14.5px;
  color: var(--tx-2);
  border-radius: 8px;
  transition: color .3s, background .3s;
  white-space: nowrap;
}
.nav-links a::after {
  content:''; position:absolute; left:14px; right:14px; bottom:2px;
  height:1.5px; background: var(--grad);
  transform: scaleX(0); transform-origin: left;
  transition: transform .35s var(--ease);
}
.nav-links a:hover { color:#fff; background: var(--glass); }
.nav-links a:hover::after { transform: scaleX(1); }
.nav-links a.active { color:#fff; }
.nav-links a.active::after { transform: scaleX(1); }

.nav-cta {
  display:inline-flex; align-items:center; gap:8px;
  padding: 10px 20px;
  font-size:14px; font-weight:600;
  border-radius: 100px;
  background: var(--grad);
  color:#fff;
  box-shadow: 0 6px 24px rgba(99,102,241,.36);
  transition: transform .3s var(--ease), box-shadow .3s;
  white-space: nowrap;
}
.nav-cta svg { width:16px; height:16px; }
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 10px 32px rgba(99,102,241,.5); }

.nav-toggle { display:none; background:none; border:none; cursor:pointer; padding:8px; }
.nav-toggle span {
  display:block; width:22px; height:2px; background:#fff; border-radius:2px;
  transition: all .3s var(--ease);
}
.nav-toggle span + span { margin-top:5px; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity:0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- HERO ---------- */
.hero {
  position:relative;
  min-height: 100vh;
  display:flex; align-items:center;
  padding: 150px 0 100px;
  overflow:hidden;
}

.hero-bg { position:absolute; inset:0; z-index:0; }

.grid-lines {
  position:absolute; inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.028) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 75%);
}

.orb { position:absolute; border-radius:50%; filter: blur(90px); opacity:.5; }
.orb-a {
  width: 560px; height: 560px; top: -140px; right: -100px;
  background: radial-gradient(circle, rgba(56,189,248,.42), transparent 68%);
  animation: float 16s ease-in-out infinite;
}
.orb-b {
  width: 480px; height: 480px; bottom: -160px; left: -120px;
  background: radial-gradient(circle, rgba(139,92,246,.4), transparent 68%);
  animation: float 20s ease-in-out infinite reverse;
}
.orb-c {
  width: 380px; height: 380px; top: 42%; left: 46%;
  background: radial-gradient(circle, rgba(99,102,241,.28), transparent 70%);
  animation: float 24s ease-in-out infinite;
}
@keyframes float {
  0%,100% { transform: translate(0,0) scale(1); }
  33% { transform: translate(-40px,30px) scale(1.08); }
  66% { transform: translate(30px,-24px) scale(.94); }
}

.particles { position:absolute; inset:0; width:100%; height:100%; opacity:.55; }

.hero-inner { position:relative; z-index:1; text-align:center; }

.hero-title {
  font-size: clamp(52px, 10vw, 128px);
  line-height:1.02;
  font-weight:800;
  letter-spacing:-.035em;
  margin-bottom: 30px;
}
.hero-title .line { display:block; overflow:hidden; }
.hero-title .grad {
  display:inline-block;
  background: linear-gradient(120deg, #ffffff 0%, #cfe4ff 30%, #a5b4fc 60%, #f0abfc 100%);
  background-size: 200% auto;
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shine 7s linear infinite;
}
@keyframes shine { to { background-position: 200% center; } }

.hero-sub {
  max-width: 720px;
  margin: 0 auto 44px;
  font-size: 17.5px;
  line-height: 1.95;
  color: var(--tx-2);
}
.hero-sub b { color: var(--tx-1); font-weight:600; }

.hero-actions { display:flex; gap:16px; justify-content:center; flex-wrap:wrap; margin-bottom: 84px; }

.btn {
  display:inline-flex; align-items:center; justify-content:center; gap:9px;
  padding: 15px 34px;
  font-size:15px; font-weight:600;
  border-radius: 100px;
  cursor:pointer; border:none;
  transition: all .35s var(--ease);
}
.btn svg { width:18px; height:18px; transition: transform .35s var(--ease); }
.btn:hover svg { transform: translateX(4px); }

.btn-primary {
  background: var(--grad); color:#fff;
  box-shadow: 0 10px 34px rgba(99,102,241,.4);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 16px 44px rgba(99,102,241,.55); }

.btn-ghost {
  background: var(--glass); color: var(--tx-1);
  border: 1px solid var(--bd-2);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.btn-ghost:hover { background: var(--glass-2); border-color: rgba(255,255,255,.28); transform: translateY(-3px); }

.btn-block { width:100%; }

.hero-metrics {
  display:flex; justify-content:center; gap: clamp(28px, 6vw, 88px);
  flex-wrap:wrap;
}
.hero-metrics li { display:flex; flex-direction:column; gap:4px; }
.hero-metrics strong {
  font-size: clamp(30px, 4.4vw, 46px);
  font-weight:800; line-height:1;
  background: linear-gradient(120deg, #fff, #93c5fd);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  font-family:'JetBrains Mono', monospace;
  letter-spacing:-.03em;
}
.hero-metrics span { font-size:13px; color: var(--tx-3); letter-spacing:.04em; }

.hero-scroll {
  position:absolute; bottom:28px; left:50%; transform:translateX(-50%);
  z-index:1;
  display:flex; flex-direction:column; align-items:center; gap:9px;
  font-size:10px; letter-spacing:.26em; color: var(--tx-4);
  font-family:'JetBrains Mono', monospace;
}
.hero-scroll span {
  width:1px; height:38px;
  background: linear-gradient(var(--tx-4), transparent);
  animation: scrollHint 2s ease-in-out infinite;
}
@keyframes scrollHint { 0%,100%{transform:scaleY(.5);transform-origin:top;} 50%{transform:scaleY(1);transform-origin:top;} }

/* ---------- 关于我们 ---------- */
.about { background: var(--bg-1); }

.about-grid {
  display:grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 72px;
  align-items: center;
}

.about-quote {
  margin-top: 38px;
  padding: 4px 0 4px 26px;
  position: relative;
}
.about-quote::before {
  content:''; position:absolute; left:0; top:0; bottom:0; width:2px;
  background: var(--grad); border-radius:2px;
}
.about-quote p {
  font-size: 19px; line-height:1.75; font-weight:500;
  color: var(--tx-1);
  letter-spacing:-.01em;
}

.about-right {
  display:grid; grid-template-columns: 1fr 1fr; gap: 18px;
}
.value-card {
  padding: 30px 26px;
  background: linear-gradient(160deg, var(--glass), rgba(255,255,255,.012));
  border:1px solid var(--bd);
  border-radius: var(--r-lg);
  transition: all .45s var(--ease);
  position:relative; overflow:hidden;
}
.value-card::before {
  content:''; position:absolute; inset:0;
  background: var(--grad-soft);
  opacity:0; transition: opacity .45s;
}
.value-card:hover { transform: translateY(-6px); border-color: var(--bd-2); box-shadow: var(--sh); }
.value-card:hover::before { opacity:1; }
.value-card > * { position:relative; }
.vc-icon {
  font-size:18px; margin-bottom:16px;
  background: var(--grad); -webkit-background-clip:text; background-clip:text;
  -webkit-text-fill-color:transparent;
}
.value-card h4 { font-size:17px; margin-bottom:10px; font-weight:600; }
.value-card p { font-size:14px; color: var(--tx-2); line-height:1.75; }

/* ---------- 核心业务 ---------- */
.capability { background: var(--bg-0); }

.cap-grid {
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
/* 8 张卡在 3 列下尾行剩 2 张，让最后一张横跨 2 列补齐整行 */
.cap-card.cap-wide { grid-column: span 2; }
.cap-card.cap-wide .cap-ico { width:60px; height:60px; }
.cap-card.cap-wide .cap-ico svg { width:29px; height:29px; }
.cap-card.cap-wide h3 { font-size:21px; }
.cap-card.cap-wide p { max-width: 720px; }

.cap-card {
  position:relative;
  padding: 36px 30px 32px;
  background: linear-gradient(165deg, rgba(255,255,255,.045), rgba(255,255,255,.008));
  border:1px solid var(--bd);
  border-radius: var(--r-lg);
  overflow:hidden;
  transition: all .5s var(--ease);
}
.cap-card::before {
  content:''; position:absolute; inset:0;
  background: radial-gradient(600px circle at var(--mx,50%) var(--my,0%), rgba(99,102,241,.16), transparent 42%);
  opacity:0; transition: opacity .45s;
}
.cap-card:hover { transform: translateY(-8px); border-color: var(--bd-2); box-shadow: var(--sh); }
.cap-card:hover::before { opacity:1; }
.cap-card > * { position:relative; }

.cap-no {
  position:absolute; top:22px; right:26px;
  font-family:'JetBrains Mono', monospace;
  font-size:44px; font-weight:700; line-height:1;
  color: rgba(255,255,255,.05);
  transition: color .45s;
}
.cap-card:hover .cap-no { color: rgba(255,255,255,.1); }

.cap-ico {
  width:54px; height:54px;
  display:grid; place-items:center;
  margin-bottom:22px;
  border-radius: 15px;
  background: var(--grad);
  color:#fff;
  box-shadow: 0 8px 26px rgba(99,102,241,.34);
  transition: transform .5s var(--ease);
}
.cap-ico svg { width:26px; height:26px; }
.cap-card:hover .cap-ico { transform: scale(1.08) rotate(-6deg); }

.cap-card h3 { font-size:19px; font-weight:600; margin-bottom:13px; line-height:1.4; letter-spacing:-.01em; }
.cap-card p { font-size:14.5px; color: var(--tx-2); line-height:1.82; margin-bottom:20px; }

.cap-tags { display:flex; flex-wrap:wrap; gap:7px; }
.cap-tags li {
  font-size:12px; padding: 5px 11px;
  color: var(--tx-2);
  background: var(--glass);
  border:1px solid var(--bd);
  border-radius: 6px;
  transition: all .3s;
}
.cap-card:hover .cap-tags li { border-color: rgba(255,255,255,.2); color: var(--tx-1); }

.cap-line {
  position:absolute; left:0; bottom:0; height:2px; width:100%;
  background: var(--grad);
  transform: scaleX(0); transform-origin: left;
  transition: transform .55s var(--ease);
}
.cap-card:hover .cap-line { transform: scaleX(1); }

/* ---------- AI 技术栈 ---------- */
.ai { background: var(--bg-1); }

.ai-stack { display:flex; flex-direction:column; gap: 16px; }

.layer {
  display:grid;
  grid-template-columns: 190px 1fr;
  gap: 28px;
  align-items:center;
  padding: 30px 32px;
  background: linear-gradient(120deg, rgba(255,255,255,.04), rgba(255,255,255,.008));
  border:1px solid var(--bd);
  border-radius: var(--r-lg);
  transition: all .45s var(--ease);
  position:relative; overflow:hidden;
}
.layer::after {
  content:''; position:absolute; left:0; top:0; bottom:0; width:3px;
  background: var(--grad); transform: scaleY(0); transform-origin: top;
  transition: transform .5s var(--ease);
}
.layer:hover { border-color: var(--bd-2); background: linear-gradient(120deg, rgba(255,255,255,.06), rgba(255,255,255,.015)); }
.layer:hover::after { transform: scaleY(1); }

.layer-label { display:flex; flex-direction:column; gap:4px; }
.layer-label b { font-size:19px; font-weight:600; }
.layer-label span {
  font-size:10.5px; letter-spacing:.2em; color: var(--g1);
  font-family:'JetBrains Mono', monospace;
}

.layer-body { display:flex; flex-wrap:wrap; gap:9px; }
.chip {
  padding: 8px 15px;
  font-size:13.5px;
  color: var(--tx-1);
  background: var(--glass);
  border:1px solid var(--bd);
  border-radius:100px;
  transition: all .32s var(--ease);
  white-space:nowrap;
}
.chip:hover {
  background: rgba(99,102,241,.18);
  border-color: rgba(139,146,255,.5);
  transform: translateY(-3px);
}

.layer-note {
  grid-column: 2;
  font-size:13.5px; color: var(--tx-3);
  padding-top: 12px; margin-top: 4px;
  border-top: 1px solid rgba(255,255,255,.05);
}

.ai-points {
  display:grid; grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 56px;
}
.ai-point {
  padding: 28px 24px;
  border-left: 2px solid var(--g2);
  background: linear-gradient(90deg, rgba(99,102,241,.07), transparent);
  transition: all .4s var(--ease);
}
.ai-point:hover { border-left-color: var(--g1); background: linear-gradient(90deg, rgba(56,189,248,.1), transparent); }
.ap-num { font-size:16px; font-weight:600; margin-bottom:9px; }
.ai-point p { font-size:14px; color: var(--tx-2); line-height:1.78; }

/* ---------- 公共数据平台 ---------- */
.platform { background: var(--bg-0); }
.platform-grid {
  display:grid; grid-template-columns: 1fr 1fr;
  gap: 80px; align-items:center;
}

.platform-visual {
  position:relative;
  aspect-ratio: 1;
  display:grid; place-items:center;
  /* pv-node 用绝对定位挂在容器边缘，允许溢出圆环之外，
     但不能撑宽页面 —— 窄屏下把它们收进来。 */
  overflow: visible;
}
.pv-ring {
  position:absolute; border-radius:50%; border:1px solid rgba(255,255,255,.08);
}
.pv-ring-1 { width:100%; height:100%; animation: spin 40s linear infinite; border-style:dashed; }
.pv-ring-2 { width:74%; height:74%; animation: spin 30s linear infinite reverse; border-color: rgba(99,102,241,.22); }
.pv-ring-3 { width:48%; height:48%; animation: spin 22s linear infinite; border-color: rgba(56,189,248,.28); }
@keyframes spin { to { transform: rotate(360deg); } }

.pv-core {
  position:relative; z-index:2;
  width:172px; height:172px; border-radius:50%;
  display:grid; place-items:center; gap:6px;
  align-content:center;
  background: radial-gradient(circle at 30% 25%, rgba(99,102,241,.4), rgba(10,12,18,.95));
  border:1px solid rgba(255,255,255,.16);
  box-shadow: 0 0 70px rgba(99,102,241,.36);
}
.pv-core b { font-size:14px; font-weight:600; letter-spacing:.02em; }

.pv-node {
  position:absolute; z-index:2;
  padding: 9px 17px;
  font-size:13.5px;
  background: rgba(16,19,28,.9);
  border:1px solid var(--bd-2);
  border-radius:100px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all .35s var(--ease);
  white-space:nowrap;
}
.pv-node:hover {
  background: rgba(99,102,241,.24);
  border-color: rgba(139,146,255,.6);
  transform: scale(1.08);
}
.pv-n1 { top:6%; left:50%; transform:translateX(-50%); }
.pv-n2 { top:26%; right:-2%; }
.pv-n3 { bottom:20%; right:2%; }
.pv-n4 { bottom:2%; left:50%; transform:translateX(-50%); }
.pv-n5 { bottom:20%; left:2%; }
.pv-n6 { top:26%; left:-2%; }
.pv-n1:hover, .pv-n4:hover { transform: translateX(-50%) scale(1.08); }

.pl-list { margin-top: 36px; display:flex; flex-direction:column; gap: 1px; background: var(--bd); border:1px solid var(--bd); border-radius: var(--r); overflow:hidden; }
.pl-item {
  padding: 18px 24px;
  background: var(--bg-1);
  transition: all .35s;
  display:flex; flex-direction:column; gap:5px;
}
.pl-item:hover { background: var(--bg-3); padding-left: 30px; }
.pl-item b { font-size:15px; font-weight:600; }
.pl-item span { font-size:13.5px; color: var(--tx-2); line-height:1.7; }

/* ---------- 数字文化 ---------- */
.culture { background: var(--bg-1); }
.culture-grid {
  display:grid; grid-template-columns: repeat(6, 1fr);
  gap: 20px;
}
.ct-card {
  grid-column: span 2;
  background: linear-gradient(165deg, rgba(255,255,255,.045), rgba(255,255,255,.008));
  border:1px solid var(--bd);
  border-radius: var(--r-lg);
  overflow:hidden;
  transition: all .5s var(--ease);
  display:flex; flex-direction:column;
}
.ct-card.ct-wide { grid-column: span 3; flex-direction: row; }
.ct-card:hover { transform: translateY(-7px); border-color: var(--bd-2); box-shadow: var(--sh); }

.ct-visual {
  height: 168px; position:relative; overflow:hidden;
  display:grid; place-items:center;
  flex-shrink:0;
}
.ct-wide .ct-visual { height:auto; width:46%; }
.ct-v1 { background: linear-gradient(135deg, #1e3a8a, #4c1d95); }
.ct-v2 { background: linear-gradient(135deg, #0f766e, #155e75); }
.ct-v3 { background: linear-gradient(135deg, #9a3412, #7c2d12); }
.ct-v4 { background: linear-gradient(135deg, #1e40af, #312e81); }
.ct-v5 { background: linear-gradient(135deg, #6d28d9, #9d174d); }

.ct-shape {
  width: 84px; height:84px;
  border:2px solid rgba(255,255,255,.42);
  transform: rotate(45deg);
  transition: all .7s var(--ease);
  position:relative;
}
.ct-shape::after {
  content:''; position:absolute; inset:14px;
  border:2px solid rgba(255,255,255,.22);
}
.ct-card:hover .ct-shape { transform: rotate(225deg) scale(1.1); border-color: rgba(255,255,255,.75); }
.ct-card:hover .ct-shape::after { inset:22px; border-color: rgba(255,255,255,.45); }

.ct-body { padding: 26px 26px 28px; flex:1; display:flex; flex-direction:column; }
.ct-tag {
  align-self:flex-start;
  font-size:11.5px; letter-spacing:.1em;
  padding: 4px 11px; margin-bottom:13px;
  color: var(--g1);
  background: rgba(56,189,248,.1);
  border:1px solid rgba(56,189,248,.24);
  border-radius:100px;
}
.ct-body h3 { font-size:18px; font-weight:600; margin-bottom:10px; letter-spacing:-.01em; }
.ct-body p { font-size:14px; color: var(--tx-2); line-height:1.8; }

/* ---------- 安全 ---------- */
.security { background: var(--bg-0); }
.sec-grid { display:grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

.sec-item {
  padding: 32px 26px;
  background: linear-gradient(165deg, rgba(255,255,255,.04), rgba(255,255,255,.006));
  border:1px solid var(--bd);
  border-radius: var(--r-lg);
  transition: all .45s var(--ease);
}
.sec-item:hover { transform: translateY(-6px); border-color: var(--bd-2); box-shadow: var(--sh); }
.sec-ico {
  font-size:28px; margin-bottom:18px;
  width:56px; height:56px; display:grid; place-items:center;
  background: var(--glass); border:1px solid var(--bd);
  border-radius:15px;
}
.sec-item h3 { font-size:16.5px; font-weight:600; margin-bottom:11px; }
.sec-item p { font-size:14px; color: var(--tx-2); line-height:1.78; }

.sec-banner {
  display:grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin-top: 48px;
  background: var(--bd);
  border:1px solid var(--bd);
  border-radius: var(--r);
  overflow:hidden;
}
.sb-item {
  padding: 26px 22px; text-align:center;
  background: var(--bg-1);
  transition: background .35s;
}
.sb-item:hover { background: var(--bg-3); }
.sb-item b { display:block; font-size:19px; font-weight:700; margin-bottom:5px; letter-spacing:-.01em; }
.sb-item span { font-size:13px; color: var(--tx-3); }

/* ---------- 物联网 ---------- */
.iot { background: var(--bg-0); }

.iot-flow {
  display:flex; align-items:stretch; gap: 8px;
  margin-bottom: 56px;
}
.if-step {
  flex:1;
  padding: 28px 24px;
  background: linear-gradient(165deg, rgba(255,255,255,.04), rgba(255,255,255,.006));
  border:1px solid var(--bd);
  border-radius: var(--r-lg);
  transition: all .45s var(--ease);
}
.if-step:hover { transform: translateY(-6px); border-color: var(--bd-2); box-shadow: var(--sh); }
.if-no {
  width:38px; height:38px; margin-bottom:16px;
  display:grid; place-items:center;
  border-radius:11px;
  background: var(--grad);
  font-family:'JetBrains Mono', monospace;
  font-size:13px; font-weight:700; color:#fff;
  box-shadow: 0 6px 20px rgba(99,102,241,.32);
}
.if-step h4 { font-size:16px; font-weight:600; margin-bottom:9px; }
.if-step p { font-size:13.5px; color: var(--tx-2); line-height:1.75; }

.if-arrow {
  align-self:center;
  color: var(--tx-4);
  flex-shrink:0;
  transition: color .35s, transform .35s var(--ease);
}
.if-arrow svg { width:20px; height:20px; }
.iot-flow:hover .if-arrow { color: var(--g1); }

.iot-scenes {
  display:grid; grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.iot-scene {
  padding: 30px 26px;
  background: linear-gradient(165deg, rgba(255,255,255,.035), rgba(255,255,255,.006));
  border:1px solid var(--bd);
  border-radius: var(--r-lg);
  transition: all .45s var(--ease);
}
.iot-scene:hover { transform: translateY(-6px); border-color: var(--bd-2); box-shadow: var(--sh); }
.is-ico {
  font-size:28px; margin-bottom:16px;
  width:54px; height:54px; display:grid; place-items:center;
  background: var(--glass); border:1px solid var(--bd);
  border-radius:15px;
}
.iot-scene h3 { font-size:16.5px; font-weight:600; margin-bottom:10px; }
.iot-scene p { font-size:14px; color: var(--tx-2); line-height:1.78; }

/* ---------- 技术栈云 ---------- */
.stack-sec { background: var(--bg-1); padding: 100px 0; }
.stack-cloud {
  display:flex; flex-wrap:wrap;
  gap:12px; justify-content:center;
  max-width: 940px; margin:0 auto;
}
.st {
  padding: 10px 20px;
  font-size:14px; font-weight:500;
  border-radius:100px;
  background: var(--glass);
  border:1px solid var(--bd);
  color: var(--tx-2);
  transition: all .35s var(--ease);
}
.st:hover {
  background: rgba(99,102,241,.18);
  border-color: rgba(139,146,255,.5);
  color:#fff;
  transform: translateY(-4px) scale(1.04);
}

/* ---------- 交付流程 ---------- */
.flow-sec { background: var(--bg-0); }
.flow {
  display:grid; grid-template-columns: repeat(6, 1fr);
  gap: 18px;
  position:relative;
}
.flow::before {
  content:''; position:absolute;
  top: 42px; left: 8%; right: 8%; height:1px;
  background: linear-gradient(90deg, transparent, rgba(99,102,241,.5), transparent);
}
.flow-item { position:relative; text-align:center; }
.flow-no {
  width:56px; height:56px;
  margin: 0 auto 20px;
  display:grid; place-items:center;
  border-radius:50%;
  background: var(--bg-0);
  border:1.5px solid rgba(99,102,241,.4);
  font-family:'JetBrains Mono', monospace;
  font-size:15px; font-weight:700;
  color: var(--g1);
  position:relative; z-index:1;
  transition: all .45s var(--ease);
}
.flow-item:hover .flow-no {
  background: var(--grad); color:#fff; border-color:transparent;
  transform: scale(1.1);
  box-shadow: 0 0 30px rgba(99,102,241,.5);
}
.flow-item h4 { font-size:16px; font-weight:600; margin-bottom:9px; }
.flow-item p { font-size:13.5px; color: var(--tx-2); line-height:1.72; padding:0 4px; }

/* ---------- 联系 ---------- */
.contact { background: var(--bg-1); padding-bottom: 110px; }

.contact-card {
  display:grid; grid-template-columns: 1fr 1fr;
  gap: 56px;
  padding: 56px;
  background: linear-gradient(150deg, rgba(255,255,255,.05), rgba(255,255,255,.012));
  border:1px solid var(--bd-2);
  border-radius: 28px;
  box-shadow: var(--sh);
  position:relative; overflow:hidden;
}
.contact-card::before {
  content:''; position:absolute;
  top:-40%; right:-20%;
  width:520px; height:520px; border-radius:50%;
  background: radial-gradient(circle, rgba(99,102,241,.16), transparent 68%);
  pointer-events:none;
}

.cc-list { margin-top: 36px; display:flex; flex-direction:column; gap: 20px; }
.cc-item { display:flex; gap:16px; align-items:flex-start; }
.cc-ico {
  width:44px; height:44px; flex-shrink:0;
  display:grid; place-items:center;
  background: var(--glass); border:1px solid var(--bd);
  border-radius:12px; font-size:19px;
}
.cc-item > div:last-child { display:flex; flex-direction:column; gap:3px; padding-top:2px; }
.cc-item b { font-size:12.5px; font-weight:500; color: var(--tx-3); letter-spacing:.04em; }
.cc-item a, .cc-item span { font-size:16px; font-weight:500; color: var(--tx-1); line-height:1.6; }
.cc-item a { transition: color .3s; }
.cc-item a:hover { background: var(--grad); -webkit-background-clip:text; background-clip:text; -webkit-text-fill-color:transparent; }

.cc-right { position:relative; }
.cc-form {
  padding: 32px;
  background: rgba(6,7,11,.6);
  border:1px solid var(--bd);
  border-radius: var(--r-lg);
  display:flex; flex-direction:column; gap:16px;
}
.cc-form h3 { font-size:19px; font-weight:600; margin-bottom:4px; }

.f-row { display:grid; grid-template-columns: 1fr 1fr; gap:14px; }
.f-field { display:flex; flex-direction:column; gap:8px; }
.f-field > span { font-size:13px; color: var(--tx-2); font-weight:500; }
.f-field i { color: #f87171; font-style:normal; }

.f-field input, .f-field select, .f-field textarea {
  width:100%; padding: 12px 15px;
  font-size:14.5px;
  background: rgba(255,255,255,.035);
  border:1px solid var(--bd);
  border-radius:11px;
  color: var(--tx-1);
  transition: all .3s;
  resize: vertical;
}
.f-field input::placeholder, .f-field textarea::placeholder { color: var(--tx-4); }
.f-field input:focus, .f-field select:focus, .f-field textarea:focus {
  outline:none;
  border-color: rgba(99,102,241,.7);
  background: rgba(99,102,241,.07);
  box-shadow: 0 0 0 3px rgba(99,102,241,.14);
}
.f-field input.err, .f-field select.err, .f-field textarea.err {
  border-color: rgba(248,113,113,.75);
  box-shadow: 0 0 0 3px rgba(248,113,113,.12);
}
.f-field select { cursor:pointer; appearance:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236b7488' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat; background-position:right 13px center; background-size:17px;
  padding-right:40px;
}
.f-field select option { background: var(--bg-2); color: var(--tx-1); }

.f-tip { font-size:12.5px; color: var(--tx-4); text-align:center; line-height:1.6; }

.form-ok {
  display:flex; flex-direction:column; align-items:center; gap:14px;
  padding: 52px 24px; text-align:center;
}
.form-ok .ok-ico {
  width:64px; height:64px; border-radius:50%;
  display:grid; place-items:center;
  background: rgba(52,211,153,.12);
  border:1px solid rgba(52,211,153,.36);
  font-size:28px;
  animation: pop .5s var(--ease);
}
@keyframes pop { from { transform:scale(.5); opacity:0; } to { transform:scale(1); opacity:1; } }
.form-ok b { font-size:18px; }
.form-ok span { font-size:14px; color: var(--tx-2); line-height:1.75; }
.form-ok a { color: var(--g1); font-weight:600; }
.form-ok a:hover { text-decoration: underline; }

/* ---------- 页脚 ---------- */
.footer { background: var(--bg-0); border-top:1px solid var(--bd); padding: 68px 0 28px; }

.ft-top {
  display:grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  gap: 40px;
  padding-bottom: 44px;
  border-bottom: 1px solid var(--bd);
}
.ft-brand img { width:150px; height:auto; margin-bottom:14px; }
.ft-brand p { font-size:13.5px; color: var(--tx-3); letter-spacing:.14em; }

.ft-col { display:flex; flex-direction:column; gap:11px; }
.ft-col h5 { font-size:13.5px; font-weight:600; color: var(--tx-1); margin-bottom:4px; letter-spacing:.04em; }
.ft-col a, .ft-col p { font-size:13.5px; color: var(--tx-3); line-height:1.75; transition: color .3s; }
.ft-col a:hover { color: var(--g1); }

.ft-bottom {
  display:flex; justify-content:space-between; align-items:center;
  gap: 20px; flex-wrap:wrap;
  padding-top: 26px;
}
.ft-legal { display:flex; align-items:center; gap:18px; flex-wrap:wrap; font-size:13px; color: var(--tx-4); }
/* ICP 备案号：前缀标签高亮，便于访客一眼识别 */
.ft-legal .icp {
  display:inline-flex; align-items:center; gap:2px;
  transition: all .3s var(--ease);
  padding: 3px 12px;
  border:1px solid rgba(56,189,248,.3);
  border-radius: 100px;
  background: rgba(56,189,248,.08);
  font-family:'JetBrains Mono', monospace;
  font-size:12.5px;
  color: var(--tx-1);
}
.ft-legal .icp i {
  font-style:normal;
  font-weight:600;
  color: var(--g1);
  text-shadow: 0 0 14px rgba(56,189,248,.5);
}
.ft-legal .icp:hover {
  background: rgba(56,189,248,.16);
  border-color: rgba(56,189,248,.65);
  box-shadow: 0 0 18px rgba(56,189,248,.24);
}
.ft-legal .icp:hover i { color: var(--g4); }
.ft-slogan {
  font-size:11.5px; letter-spacing:.14em;
  color: var(--tx-4);
  font-family:'JetBrains Mono', monospace;
}

/* ---------- 回到顶部 ---------- */
.to-top {
  position: fixed; right: 28px; bottom: 28px; z-index: 90;
  width:46px; height:46px;
  display:grid; place-items:center;
  background: rgba(16,19,28,.86);
  border:1px solid var(--bd-2);
  border-radius:50%;
  color:#fff; cursor:pointer;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  opacity:0; visibility:hidden; transform: translateY(14px);
  transition: all .4s var(--ease);
}
.to-top.show { opacity:1; visibility:visible; transform: translateY(0); }
.to-top:hover { background: var(--grad); border-color:transparent; transform: translateY(-3px); }
.to-top svg { width:19px; height:19px; }

/* ---------- 滚动进场动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(34px);
  transition: opacity .85s var(--ease) var(--d, 0ms), transform .85s var(--ease) var(--d, 0ms);
}
.reveal.in { opacity:1; transform: translateY(0); }

/* 入场动画的降级：无 JS 时也要能看 */
.no-js .reveal { opacity:1; transform:none; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration:.01ms !important; animation-iteration-count:1 !important; transition-duration:.01ms !important; scroll-behavior:auto !important; }
  .reveal { opacity:1; transform:none; }
}

/* ============================================================
   响应式
   ============================================================ */

@media (max-width: 1180px) {
  .nav-links { gap:0; }
  .nav-links a { padding: 8px 10px; font-size:13.5px; }
  .flow { grid-template-columns: repeat(3, 1fr); row-gap: 34px; }
  .flow::before { display:none; }
  .ft-top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 1024px) {
  .sec { padding: 92px 0; }
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .cap-grid { grid-template-columns: repeat(2, 1fr); }
  .sec-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-points { grid-template-columns: repeat(2, 1fr); }
  .iot-flow { flex-wrap: wrap; }
  .if-step { flex: 1 1 calc(50% - 8px); }
  .if-arrow { display: none; }
  .iot-scenes { grid-template-columns: repeat(2, 1fr); }
  .platform-grid { grid-template-columns: 1fr; gap: 52px; }
  .platform-visual { max-width: 440px; margin: 0 auto; width:100%; }
  /* 窄屏下把外挂节点收进容器，避免负偏移撑出横向滚动条 */
  .pv-n2, .pv-n3 { right: 0; }
  .pv-n5, .pv-n6 { left: 0; }
  .pv-node { font-size:12.5px; padding: 7px 13px; }
  .contact-card { grid-template-columns: 1fr; gap: 40px; padding: 40px; }
  .culture-grid { grid-template-columns: repeat(4, 1fr); }
  .ct-card, .ct-card.ct-wide { grid-column: span 2; flex-direction: column; }
  .ct-wide .ct-visual { width:auto; height:168px; }
}

@media (max-width: 860px) {
  .nav-links {
    position: fixed; inset: 0 0 0 auto;
    width: 300px; max-width: 84vw;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 96px 24px 32px;
    background: rgba(8,10,15,.97);
    backdrop-filter: blur(22px);
    -webkit-backdrop-filter: blur(22px);
    border-left: 1px solid var(--bd);
    transform: translateX(100%);
    transition: transform .45s var(--ease);
    z-index: 101;
    overflow-y: auto;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links a { padding: 14px 16px; font-size: 16px; border-radius: 10px; }
  .nav-links a::after { display:none; }
  .nav-links a.active { background: var(--glass); }
  .nav-cta { display:none; }
  .nav-toggle { display:block; margin-left:auto; position:relative; z-index: 102; }

  .nav-backdrop {
    position: fixed; inset:0; z-index:99;
    background: rgba(0,0,0,.6);
    backdrop-filter: blur(3px);
    opacity:0; visibility:hidden;
    transition: all .4s var(--ease);
  }
  .nav-backdrop.show { opacity:1; visibility:visible; }
}

@media (max-width: 720px) {
  .wrap { padding: 0 20px; }
  .nav-inner { padding: 0 20px; }
  .sec { padding: 76px 0; }
  .sec-head { margin-bottom: 46px; }

  /* 光晕按比例缩小，避免超出视口（overflow-x:hidden 只是兜底） */
  .orb-a { width: 300px; height: 300px; top: -80px; right: -90px; }
  .orb-b { width: 280px; height: 280px; bottom: -100px; left: -100px; }
  .orb-c { width: 240px; height: 240px; top: 42%; left: 32%; }

  .hero { padding: 128px 0 78px; min-height: auto; }
  .hero-actions { margin-bottom: 58px; }
  .btn { padding: 13px 26px; font-size:14.5px; }
  .hero-metrics { gap: 26px 44px; }
  .hero-scroll { display:none; }

  .about-right { grid-template-columns: 1fr; }
  .cap-grid { grid-template-columns: 1fr; }
  .sec-grid { grid-template-columns: 1fr; }
  .ai-points { grid-template-columns: 1fr; }
  .iot-flow { flex-direction: column; }
  .if-step { flex: none; }
  .iot-scenes { grid-template-columns: 1fr; }
  .sec-banner { grid-template-columns: repeat(2, 1fr); }

  .layer { grid-template-columns: 1fr; gap: 18px; padding: 24px; }
  .layer-note { grid-column: 1; }

  .culture-grid { grid-template-columns: 1fr; }
  .ct-card, .ct-card.ct-wide { grid-column: span 1; }

  .flow { grid-template-columns: repeat(2, 1fr); }
  .contact-card { padding: 28px 22px; border-radius: 20px; }
  .f-row { grid-template-columns: 1fr; }
  .cc-form { padding: 24px 20px; }
  .cc-item a, .cc-item span { font-size:15px; }

  .ft-top { grid-template-columns: 1fr; gap: 32px; }
  .ft-bottom { flex-direction: column; align-items: flex-start; gap: 14px; }
  .to-top { right: 16px; bottom: 16px; width:42px; height:42px; }
}

@media (max-width: 420px) {
  .flow { grid-template-columns: 1fr; }
  .sec-banner { grid-template-columns: 1fr; }
  .hero-metrics { gap: 22px 32px; }
  .brand-text em { display:none; }
}