:root {
  /* 背景 */
  --bg-white: #FFFFFF;
  --bg-light: #F7F8FC;
  --bg-dark:  #0B0F1A;

  /* 文字 */
  --txt-dark:  #0B0F1A;
  --txt-mid:   #3D4563;
  --txt-muted: #8892B0;
  --txt-white: #FFFFFF;

  /* 品牌主色 */
  --c-blue:   #2563EB;
  --c-indigo: #4F46E5;
  --c-violet: #7C3AED;
  --c-teal:   #0D9488;
  --c-orange: #EA580C;
  --c-amber:  #D97706;
  --c-rose:   #E11D48;
  --c-green:  #16A34A;

  /* 浅色背景版本（用于服务卡图示区） */
  --bg-blue:   #EFF6FF;
  --bg-indigo: #EEF2FF;
  --bg-violet: #F5F3FF;
  --bg-teal:   #F0FDFA;
  --bg-orange: #FFF7ED;
  --bg-rose:   #FFF1F2;

  /* 边框 */
  --border-light: #E5E7EB;
  --border-dark:  rgba(255,255,255,0.1);

  /* 字体 */
  --font: 'Inter', 'Noto Sans SC', sans-serif;
  --mono: 'JetBrains Mono', monospace;

  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
}

/* =============================================
   RESET & BASE
   ============================================= */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg-white);
  color: var(--txt-dark);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-thumb { background: var(--c-blue); border-radius: 2px; }

/* =============================================
   LAYOUT UTILS
   ============================================= */
.wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 48px;
}

/* 滚动入场 */
.appear {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.appear.visible {
  opacity: 1;
  transform: translateY(0);
}

/* =============================================
   NAVIGATION
   ============================================= */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 64px;
  z-index: 1000;
  transition: background 0.3s, border-color 0.3s, box-shadow 0.3s;
}
#nav.scrolled {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: 0 1px 12px rgba(0,0,0,0.06);
}
.nav-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 48px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--txt-dark);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.03em;
}
.nav-logo-mark {
  width: 34px; height: 34px;
  background: linear-gradient(135deg, var(--c-blue), var(--c-indigo));
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--txt-white);
  font-size: 15px; font-weight: 900;
  flex-shrink: 0;
}
.nav-links {
  display: flex;
  gap: 2px;
  list-style: none;
}
.nav-links a {
  display: block;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  color: var(--txt-mid);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover {
  color: var(--txt-dark);
  background: var(--bg-light);
}
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 22px;
  background: var(--txt-dark);
  color: var(--txt-white);
  border-radius: 100px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.25s, transform 0.2s;
  letter-spacing: -0.01em;
}
.nav-cta:hover {
  background: var(--c-blue);
  transform: translateY(-1px);
}

/* =============================================
   HERO
   ============================================= */
#hero {
  min-height: 100vh;
  background: var(--bg-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 48px 100px;
  position: relative;
  overflow: hidden;
}

/* 背景光晕 — 纯 CSS radial-gradient，无变量引用问题 */
#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 60% at 20% 40%, rgba(79,70,229,0.20) 0%, transparent 60%),
    radial-gradient(ellipse 50% 50% at 80% 30%, rgba(37,99,235,0.18) 0%, transparent 55%),
    radial-gradient(ellipse 40% 40% at 60% 75%, rgba(13,148,136,0.12) 0%, transparent 50%);
  pointer-events: none;
}

/* 网格 */
#hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 56px 56px;
  pointer-events: none;
  mask-image: radial-gradient(ellipse 70% 70% at center, black 30%, transparent 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 820px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px 6px 10px;
  background: rgba(79,70,229,0.15);
  border: 1px solid rgba(79,70,229,0.35);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  color: #A5B4FC;
  margin-bottom: 32px;
}
.badge-dot {
  width: 6px; height: 6px;
  background: #818CF8;
  border-radius: 50%;
  animation: pulse-dot 1.5s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50%       { transform: scale(1.6); opacity: 0.5; }
}

.hero-h1 {
  font-size: clamp(40px, 6vw, 76px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.04em;
  color: var(--txt-white);
  margin-bottom: 24px;
}
.hero-h1 .highlight {
  /* 渐变文字 — 不使用 CSS 变量，直接写色值避免引用失效 */
  background: linear-gradient(135deg, #60A5FA, #818CF8, #34D399);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: clamp(16px, 2vw, 19px);
  color: #94A3B8;
  line-height: 1.75;
  max-width: 560px;
  margin: 0 auto 44px;
  font-weight: 400;
}

.hero-btns {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 72px;
}
.btn-solid {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 30px;
  background: var(--txt-white);
  color: var(--txt-dark);
  border-radius: 100px;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s;
  letter-spacing: -0.01em;
}
.btn-solid:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(255,255,255,0.18);
}
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.18);
  color: var(--txt-white);
  border-radius: 100px;
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.2s, transform 0.2s;
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.14);
  transform: translateY(-2px);
}

/* 数据统计条 */
.hero-stats {
  display: inline-flex;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: rgba(255,255,255,0.04);
  backdrop-filter: blur(12px);
}
.hstat {
  padding: 18px 32px;
  text-align: center;
  border-right: 1px solid rgba(255,255,255,0.08);
}
.hstat:last-child { border-right: none; }
.hstat-n {
  font-size: 28px;
  font-weight: 800;
  color: var(--txt-white);
  line-height: 1;
  margin-bottom: 5px;
  letter-spacing: -0.03em;
}
.hstat-l {
  font-size: 12px;
  color: #64748B;
  letter-spacing: 0.03em;
}

/* =============================================
   PARTNERS STRIP
   ============================================= */
#partners {
  background: var(--bg-white);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  padding: 52px 0;
  overflow: hidden;
  position: relative;
}
#partners::before,
#partners::after {
  content: '';
  position: absolute;
  top: 0; bottom: 0;
  width: 160px;
  z-index: 2;
  pointer-events: none;
}
#partners::before { left: 0;  background: linear-gradient(90deg,  #ffffff, transparent); }
#partners::after  { right: 0; background: linear-gradient(-90deg, #ffffff, transparent); }

.partners-label {
  text-align: center;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--txt-muted);
  margin-bottom: 32px;
}
.partners-track {
  display: flex;
  gap: 0;
  width: max-content;
  animation: scroll-left 24s linear infinite;
}
.partners-track:hover { animation-play-state: paused; }

.partner-item {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 44px;
  height: 44px;
  border-right: 1px solid var(--border-light);
  flex-shrink: 0;
}
.partner-item:last-of-type { border-right: none; }
.partner-item span {
  font-size: 14px;
  font-weight: 700;
  color: #CBD5E1;
  white-space: nowrap;
  transition: color 0.25s;
}
.partner-item:hover span { color: var(--txt-mid); }

@keyframes scroll-left {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* =============================================
   SECTION COMMON HEADER
   ============================================= */
.section-header {
  text-align: center;
  margin-bottom: 72px;
}
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.section-label .label-line {
  width: 20px;
  height: 2px;
  border-radius: 1px;
}
.section-title {
  font-size: clamp(28px, 4vw, 46px);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  color: var(--txt-dark);
  margin-bottom: 16px;
}
.section-sub {
  font-size: 16px;
  color: var(--txt-muted);
  max-width: 480px;
  margin: 0 auto;
  line-height: 1.75;
}

/* =============================================
   SERVICES  ★  核心展示区
   左右交错布局：奇数行文字左/图右，偶数行图左/文字右
   ============================================= */
#services {
  background: var(--bg-white);
  padding: 100px 0 0;
}

/* 服务区大标题 */
.services-intro {
  padding-bottom: 80px;
}

/* ── 单条服务 ── */
.srv {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 520px;
  border-top: 1px solid var(--border-light);
}
/* 偶数行反转 */
.srv.flip { direction: rtl; }
.srv.flip > * { direction: ltr; }

/* 文字面板 */
.srv-text {
  padding: 72px 64px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
}
.srv.flip .srv-text {
  border-left: 1px solid var(--border-light);
}
.srv:not(.flip) .srv-text {
  border-right: 1px solid var(--border-light);
}

/* 序号 */
.srv-index {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.srv-index-num {
  width: 28px; height: 28px;
  border-radius: 7px;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 800;
  color: var(--txt-white);
  flex-shrink: 0;
}

/* 标题 */
.srv-text h3 {
  font-size: clamp(26px, 3vw, 38px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--txt-dark);
  margin-bottom: 18px;
}

/* 摘要 */
.srv-summary {
  font-size: 16px;
  color: var(--txt-mid);
  line-height: 1.85;
  max-width: 440px;
  margin-bottom: 28px;
}

/* 标签 */
.srv-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}
.srv-tags span {
  padding: 5px 14px;
  background: var(--bg-light);
  border: 1px solid var(--border-light);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  color: var(--txt-mid);
  transition: border-color 0.25s, color 0.25s;
}
.srv:hover .srv-tags span {
  border-color: #CBD5E1;
  color: var(--txt-dark);
}

/* CTA 链接 */
.srv-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 700;
  color: var(--txt-dark);
  text-decoration: none;
  transition: gap 0.2s;
  letter-spacing: -0.01em;
}
.srv-link:hover { gap: 13px; }
.srv-link-arrow {
  width: 26px; height: 26px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px;
  transition: transform 0.25s;
}
.srv-link:hover .srv-link-arrow { transform: translateX(4px); }

/* 图示面板 */
.srv-image {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 56px 48px;
  position: relative;
  overflow: hidden;
}

/* ── 各服务颜色主题（只用直接色值，不用var嵌套） ── */

/* 01 Python — 蓝色 */
.srv-01 .srv-index-num             { background: #2563EB; }
.srv-01 .srv-index                 { color: #2563EB; }
.srv-01 .srv-link                  { color: #2563EB; }
.srv-01 .srv-link-arrow            { background: #EFF6FF; color: #2563EB; }
.srv-01 .srv-image                 { background: #EFF6FF; }
.srv-01 .srv-image::before {
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(#BFDBFE 1px, transparent 1px);
  background-size: 24px 24px;
}

/* 02 Cloud — 青色 */
.srv-02 .srv-index-num             { background: #0D9488; }
.srv-02 .srv-index                 { color: #0D9488; }
.srv-02 .srv-link                  { color: #0D9488; }
.srv-02 .srv-link-arrow            { background: #F0FDFA; color: #0D9488; }
.srv-02 .srv-image                 { background: #F0FDFA; }
.srv-02 .srv-image::before {
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(#99F6E4 1px, transparent 1px);
  background-size: 24px 24px;
}

/* 03 Data — 橙色 */
.srv-03 .srv-index-num             { background: #EA580C; }
.srv-03 .srv-index                 { color: #EA580C; }
.srv-03 .srv-link                  { color: #EA580C; }
.srv-03 .srv-link-arrow            { background: #FFF7ED; color: #EA580C; }
.srv-03 .srv-image                 { background: #FFF7ED; }
.srv-03 .srv-image::before {
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(#FED7AA 1px, transparent 1px);
  background-size: 24px 24px;
}

/* 04 AI — 紫色 */
.srv-04 .srv-index-num             { background: #7C3AED; }
.srv-04 .srv-index                 { color: #7C3AED; }
.srv-04 .srv-link                  { color: #7C3AED; }
.srv-04 .srv-link-arrow            { background: #F5F3FF; color: #7C3AED; }
.srv-04 .srv-image                 { background: #F5F3FF; }
.srv-04 .srv-image::before {
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(#DDD6FE 1px, transparent 1px);
  background-size: 24px 24px;
}

/* 05 Ops — 绿色 */
.srv-05 .srv-index-num             { background: #16A34A; }
.srv-05 .srv-index                 { color: #16A34A; }
.srv-05 .srv-link                  { color: #16A34A; }
.srv-05 .srv-link-arrow            { background: #F0FDF4; color: #16A34A; }
.srv-05 .srv-image                 { background: #F0FDF4; }
.srv-05 .srv-image::before {
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(#BBF7D0 1px, transparent 1px);
  background-size: 24px 24px;
}

/* 06 Train — 玫红 */
.srv-06 .srv-index-num             { background: #E11D48; }
.srv-06 .srv-index                 { color: #E11D48; }
.srv-06 .srv-link                  { color: #E11D48; }
.srv-06 .srv-link-arrow            { background: #FFF1F2; color: #E11D48; }
.srv-06 .srv-image                 { background: #FFF1F2; }
.srv-06 .srv-image::before {
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(#FECDD3 1px, transparent 1px);
  background-size: 24px 24px;
}

/* ── 插画通用容器 ── */
.art-wrap {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 420px;
}

/* =============================================
   插画 01 — 终端窗口
   ============================================= */
.art-terminal {
  background: #0F172A;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.2);
  border: 1px solid rgba(255,255,255,0.08);
}
.term-topbar {
  background: #1E293B;
  padding: 11px 16px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.term-btn {
  width: 11px; height: 11px;
  border-radius: 50%;
  flex-shrink: 0;
}
.tb-red    { background: #FF5F57; }
.tb-yellow { background: #FEBC2E; }
.tb-green  { background: #28C840; }
.term-file {
  margin: 0 auto;
  font-family: var(--mono);
  font-size: 10px;
  color: rgba(255,255,255,0.25);
}
.term-body {
  padding: 20px 22px;
  font-family: var(--mono);
  font-size: 12.5px;
  color: #7fffd4;
  line-height: 2;
}
/* 终端代码颜色 — 全部用明确色值 */
.tk  { color: #818CF8; } /* keyword — indigo */
.tf  { color: #7DD3FC; } /* function — sky */
.ts  { color: #6EE7B7; } /* string — emerald */
.tc  { color: rgba(255,255,255,0.28); } /* comment */
.tv  { color: #FDE68A; } /* variable — amber */
.term-cursor::after {
  content: '▋';
  animation: blink 0.65s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* 悬浮徽章 */
.float-chip {
  position: absolute;
  background: #0F172A;
  border: 1px solid rgba(129,140,248,0.4);
  border-radius: var(--radius-sm);
  padding: 7px 14px;
  font-family: var(--mono);
  font-size: 11px;
  color: #A5B4FC;
  white-space: nowrap;
  animation: bob 3s ease-in-out infinite;
}
.chip-a { bottom: -14px; right: 0;  animation-delay: 0s;   }
.chip-b { top:     8px;  right: -12px; animation-delay: 0.6s; }
@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-7px); }
}

/* =============================================
   插画 02 — 云架构节点图
   ============================================= */
.art-nodes {
  width: 100%;
  position: relative;
  z-index: 1;
}

/* =============================================
   插画 03 — 数据仪表盘
   ============================================= */
.art-dashboard {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: relative;
  z-index: 1;
}
.dash-card {
  background: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: var(--radius-md);
  padding: 18px 22px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}
.dash-kpi-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
}
.kpi-cell {
  background: #F8FAFC;
  border: 1px solid #E5E7EB;
  border-radius: 10px;
  padding: 14px;
}
.kpi-value {
  font-size: 20px;
  font-weight: 800;
  color: var(--txt-dark);
  line-height: 1;
  margin-bottom: 4px;
  letter-spacing: -0.03em;
}
.kpi-label {
  font-size: 10px;
  color: var(--txt-muted);
  font-weight: 500;
}
.kpi-delta {
  font-size: 11px;
  font-weight: 700;
  margin-top: 3px;
  color: #16A34A;
}
.dash-chart-label {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--txt-muted);
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}
.dash-bars {
  display: flex;
  align-items: flex-end;
  gap: 7px;
  height: 80px;
}
.dbar {
  flex: 1;
  border-radius: 5px 5px 0 0;
  transform-origin: bottom;
  transform: scaleY(0);
  animation: grow-bar 1.3s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}
@keyframes grow-bar { to { transform: scaleY(1); } }
.dbar:nth-child(1) { height: 38%; background: #FED7AA; animation-delay: 0.1s; }
.dbar:nth-child(2) { height: 62%; background: #FDBA74; animation-delay: 0.2s; }
.dbar:nth-child(3) { height: 50%; background: #FB923C; animation-delay: 0.3s; }
.dbar:nth-child(4) { height: 90%; background: #EA580C; animation-delay: 0.4s; box-shadow: 0 4px 16px rgba(234,88,12,0.35); }
.dbar:nth-child(5) { height: 68%; background: #FB923C; animation-delay: 0.5s; }
.dbar:nth-child(6) { height: 44%; background: #FDBA74; animation-delay: 0.6s; }
.dbar:nth-child(7) { height: 55%; background: #FED7AA; animation-delay: 0.7s; }

/* =============================================
   插画 04 — AI 聊天界面
   ============================================= */
.art-chat {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: relative;
  z-index: 1;
}
.chat-bubble {
  border-radius: 14px;
  padding: 12px 16px;
  font-size: 13px;
  line-height: 1.65;
  max-width: 88%;
  animation: pop-in 0.5s ease both;
}
@keyframes pop-in {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}
.cb-user {
  background: #EDE9FE;
  border: 1px solid #DDD6FE;
  color: #5B21B6;
  align-self: flex-end;
  border-bottom-right-radius: 4px;
  animation-delay: 0.2s;
}
.cb-ai {
  background: #FFFFFF;
  border: 1px solid #E5E7EB;
  color: var(--txt-dark);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  animation-delay: 0.7s;
}
.cb-ai2 { animation-delay: 1.1s; }
.cb-typing {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 12px 16px;
  background: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 14px;
  border-bottom-left-radius: 4px;
  align-self: flex-start;
  width: 64px;
  animation-delay: 0.5s;
}
.typing-dot {
  width: 6px; height: 6px;
  background: #CBD5E1;
  border-radius: 50%;
  animation: typing 1.2s ease-in-out infinite;
}
.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }
@keyframes typing {
  0%, 80%, 100% { transform: translateY(0); opacity: 0.4; }
  40%            { transform: translateY(-5px); opacity: 1; }
}

/* =============================================
   插画 05 — 监控面板
   ============================================= */
.art-monitor {
  width: 100%;
  background: #0F172A;
  border-radius: var(--radius-md);
  padding: 24px 26px;
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 20px 60px rgba(0,0,0,0.18);
  position: relative;
  z-index: 1;
}
.monitor-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  font-family: var(--mono);
  font-size: 10px;
  color: rgba(255,255,255,0.35);
  letter-spacing: 0.1em;
}
.live-dot {
  width: 7px; height: 7px;
  background: #4ADE80;
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(74,222,128,0.2);
  animation: pulse-dot 1.2s ease-in-out infinite;
}
.metric-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 11px;
}
.metric-label {
  font-family: var(--mono);
  font-size: 10px;
  width: 36px;
  flex-shrink: 0;
}
.metric-track {
  flex: 1;
  height: 5px;
  background: rgba(255,255,255,0.07);
  border-radius: 3px;
  overflow: hidden;
}
.metric-fill {
  height: 100%;
  border-radius: 3px;
  transform: scaleX(0);
  transform-origin: left;
  animation: fill-bar 1.6s ease forwards;
}
@keyframes fill-bar { to { transform: scaleX(1); } }
.metric-val {
  font-family: var(--mono);
  font-size: 10px;
  width: 32px;
  text-align: right;
  flex-shrink: 0;
}
/* 各指标颜色 */
.m-cpu   .metric-label { color: #4ADE80; }
.m-cpu   .metric-fill  { background: #4ADE80; width: 23%; }
.m-cpu   .metric-val   { color: #4ADE80; }
.m-mem   .metric-label { color: #38BDF8; }
.m-mem   .metric-fill  { background: #38BDF8; width: 41%; animation-delay: 0.2s; }
.m-mem   .metric-val   { color: #38BDF8; }
.m-disk  .metric-label { color: #FACC15; }
.m-disk  .metric-fill  { background: #FACC15; width: 68%; animation-delay: 0.4s; }
.m-disk  .metric-val   { color: #FACC15; }
.m-net   .metric-label { color: #F87171; }
.m-net   .metric-fill  { background: #F87171; width: 12%; animation-delay: 0.6s; }
.m-net   .metric-val   { color: #F87171; }

.wave-box {
  margin-top: 14px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
}
.wave-label {
  font-family: var(--mono);
  font-size: 9px;
  color: rgba(255,255,255,0.22);
  letter-spacing: 0.1em;
  margin-bottom: 7px;
}

/* =============================================
   插画 06 — 技能进度卡
   ============================================= */
.art-skills {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
  z-index: 1;
}
.skill-header {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--txt-muted);
  margin-bottom: 4px;
}
.skill-card {
  background: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 12px;
  padding: 15px 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  transition: border-color 0.3s, transform 0.3s;
}
.skill-card:hover {
  border-color: #FECDD3;
  transform: translateX(6px);
}
.skill-icon {
  width: 36px; height: 36px;
  border-radius: 9px;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}
.si-1 { background: #FFF1F2; }
.si-2 { background: #FFF7ED; }
.si-3 { background: #F0FDF4; }
.si-4 { background: #FEF9C3; }
.skill-info { flex: 1; }
.skill-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--txt-dark);
  margin-bottom: 6px;
}
.skill-bar {
  height: 4px;
  background: #F1F5F9;
  border-radius: 100px;
  overflow: hidden;
}
.skill-fill {
  height: 100%;
  border-radius: 100px;
  transform: scaleX(0);
  transform-origin: left;
  animation: fill-bar 1.6s ease forwards;
}
.sf-1 { background: #E11D48; }
.sf-2 { background: #F97316; }
.sf-3 { background: #16A34A; }
.sf-4 { background: #CA8A04; }
.skill-pct {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--txt-muted);
  flex-shrink: 0;
  width: 30px;
  text-align: right;
}

/* =============================================
   REVIEWS
   ============================================= */
#reviews {
  background: var(--bg-light);
  padding: 100px 0;
  border-top: 1px solid var(--border-light);
}
.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.review-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 34px 30px;
  position: relative;
  overflow: hidden;
  transition: transform 0.35s, box-shadow 0.35s;
}
.review-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 56px rgba(0,0,0,0.09);
}
/* 顶部彩色条 */
.review-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
}
.rc-1::before { background: linear-gradient(90deg, #2563EB, #4F46E5); }
.rc-2::before { background: linear-gradient(90deg, #0D9488, #16A34A); }
.rc-3::before { background: linear-gradient(90deg, #EA580C, #D97706); }
.review-stars {
  display: flex;
  gap: 3px;
  margin-bottom: 18px;
}
.review-stars span { color: #F59E0B; font-size: 15px; }
.review-text {
  font-size: 14px;
  line-height: 1.9;
  color: var(--txt-mid);
  font-style: italic;
  margin-bottom: 26px;
}
.review-footer {
  display: flex;
  align-items: center;
  gap: 12px;
}
.review-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 17px; font-weight: 700;
  color: var(--txt-white);
  flex-shrink: 0;
}
.ra-1 { background: linear-gradient(135deg, #2563EB, #4F46E5); }
.ra-2 { background: linear-gradient(135deg, #0D9488, #16A34A); }
.ra-3 { background: linear-gradient(135deg, #EA580C, #D97706); }
.review-name {
  font-size: 14px; font-weight: 700;
  color: var(--txt-dark); display: block;
  margin-bottom: 2px;
}
.review-role { font-size: 12px; color: var(--txt-muted); }

/* =============================================
   NEWS
   ============================================= */
#news {
  background: var(--bg-white);
  padding: 100px 0;
  border-top: 1px solid var(--border-light);
}
.news-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 48px;
}
.news-header h2 {
  font-size: clamp(26px, 3.5vw, 40px);
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--txt-dark);
}
.news-more-link {
  font-size: 14px; font-weight: 600;
  color: var(--c-blue);
  text-decoration: none;
  display: flex; align-items: center; gap: 5px;
  transition: gap 0.2s;
}
.news-more-link:hover { gap: 9px; }
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.news-card {
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: transform 0.3s, box-shadow 0.3s;
  display: flex;
  flex-direction: column;
  background: var(--bg-white);
}
.news-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.09);
}
.news-thumb {
  height: 180px;
  display: flex; align-items: center; justify-content: center;
  position: relative; overflow: hidden;
}
.nt-1 { background: linear-gradient(135deg, #EFF6FF, #DBEAFE); }
.nt-2 { background: linear-gradient(135deg, #F0FDFA, #CCFBF1); }
.nt-3 { background: linear-gradient(135deg, #FFF7ED, #FED7AA); }
.news-thumb::before {
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(rgba(0,0,0,0.05) 1px, transparent 1px);
  background-size: 16px 16px;
}
.news-emoji { font-size: 46px; position: relative; z-index: 1; }
.news-badge {
  position: absolute; bottom: 13px; left: 13px;
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.07em;
}
.nb-blue { background: rgba(37,99,235,0.1);  color: #2563EB; border: 1px solid rgba(37,99,235,0.2);  }
.nb-teal { background: rgba(13,148,136,0.1); color: #0D9488; border: 1px solid rgba(13,148,136,0.2); }
.nb-ora  { background: rgba(234,88,12,0.1);  color: #EA580C; border: 1px solid rgba(234,88,12,0.2);  }
.news-body {
  padding: 20px 22px 24px;
  flex: 1; display: flex; flex-direction: column;
}
.news-body h3 {
  font-size: 15px; font-weight: 700;
  letter-spacing: -0.02em; line-height: 1.4;
  color: var(--txt-dark); margin-bottom: 10px; flex: 1;
}
.news-body p {
  font-size: 13px; color: var(--txt-muted); line-height: 1.7;
}
.news-meta {
  display: flex; gap: 10px; margin-top: 14px;
  font-size: 11px; color: var(--txt-muted); font-weight: 500;
}

/* =============================================
   CTA BANNER
   ============================================= */
#cta-banner {
  background: var(--bg-dark);
  padding: 80px 0;
}
.cta-inner {
  text-align: center;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-xl);
  padding: 72px 60px;
}
.cta-inner::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 50% at 50% 0%, rgba(79,70,229,0.22) 0%, transparent 70%);
  pointer-events: none;
}
.cta-inner h2 {
  font-size: clamp(30px, 4.5vw, 54px);
  font-weight: 800; letter-spacing: -0.04em;
  color: var(--txt-white); margin-bottom: 16px;
  position: relative; z-index: 1;
}
.cta-inner h2 em {
  font-style: normal;
  background: linear-gradient(135deg, #60A5FA, #818CF8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.cta-inner p {
  font-size: 17px; color: #94A3B8;
  margin-bottom: 40px; line-height: 1.7;
  max-width: 460px; margin-left: auto; margin-right: auto;
  position: relative; z-index: 1;
}
.cta-btns {
  display: flex; gap: 12px;
  justify-content: center; flex-wrap: wrap;
  position: relative; z-index: 1;
}

/* =============================================
   ABOUT
   ============================================= */
#about {
  background: var(--bg-white);
  padding: 100px 0;
  border-top: 1px solid var(--border-light);
}
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 88px;
  align-items: center;
}
.about-left .section-label { justify-content: flex-start; }
.about-left h2 {
  font-size: clamp(28px, 3.5vw, 44px);
  font-weight: 800; letter-spacing: -0.04em;
  line-height: 1.1; margin-bottom: 18px;
  color: var(--txt-dark);
}
.about-left h2 span {
  background: linear-gradient(135deg, #2563EB, #4F46E5);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.about-left p {
  font-size: 15px; color: var(--txt-muted);
  line-height: 1.9; margin-bottom: 14px;
}
.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px; margin: 36px 0 40px;
}
.about-stat {
  background: var(--bg-light);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  transition: border-color 0.3s;
}
.about-stat:hover { border-color: #BFDBFE; }
.about-stat-n {
  font-size: 34px; font-weight: 800;
  color: var(--c-blue); line-height: 1;
  margin-bottom: 6px; letter-spacing: -0.04em;
}
.about-stat-l { font-size: 12px; color: var(--txt-muted); }

/* 右侧能力列表 */
.ability-list { display: flex; flex-direction: column; gap: 10px; }
.ability-item {
  display: flex; align-items: center; gap: 14px;
  padding: 16px 20px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  background: var(--bg-white);
  transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
}
.ability-item:hover {
  border-color: #BFDBFE;
  transform: translateX(6px);
  box-shadow: 0 4px 16px rgba(37,99,235,0.08);
}
.ability-icon {
  width: 40px; height: 40px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 17px; flex-shrink: 0;
}
.ai-1{background:#EFF6FF} .ai-2{background:#F0FDFA}
.ai-3{background:#FFF7ED} .ai-4{background:#F5F3FF} .ai-5{background:#F0FDF4}
.ability-info strong {
  display: block; font-size: 14px; font-weight: 700;
  color: var(--txt-dark); margin-bottom: 2px;
}
.ability-info span { font-size: 12px; color: var(--txt-muted); }
.ability-bar-wrap { margin-left: auto; flex-shrink: 0; }
.ability-bar {
  width: 72px; height: 3px;
  background: var(--bg-light); border-radius: 100px;
  overflow: hidden; margin-bottom: 4px;
}
.ability-fill {
  height: 100%; border-radius: 100px;
  background: linear-gradient(90deg, #2563EB, #4F46E5);
  transform: scaleX(0); transform-origin: left;
  animation: fill-bar 1.6s ease forwards;
}
.ability-pct {
  font-family: var(--mono); font-size: 10px;
  color: var(--txt-muted); text-align: right;
}

/* =============================================
   FOOTER
   ============================================= */
#footer {
  background: #06080F;
  padding: 72px 0 32px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 52px; margin-bottom: 60px;
}
.footer-brand .footer-logo {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none; color: var(--txt-white);
  font-weight: 800; font-size: 18px;
  letter-spacing: -0.03em; margin-bottom: 14px;
}
.footer-brand p {
  font-size: 13px; color: #475569;
  line-height: 1.9; max-width: 220px; margin-bottom: 26px;
}
.footer-socials { display: flex; gap: 8px; }
.footer-social {
  width: 36px; height: 36px; border-radius: var(--radius-sm);
  border: 1px solid rgba(255,255,255,0.1);
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; cursor: pointer; transition: 0.25s;
  text-decoration: none; color: #475569;
}
.footer-social:hover {
  border-color: rgba(255,255,255,0.25);
  background: rgba(255,255,255,0.06);
  color: var(--txt-white);
}
.footer-col h4 {
  font-size: 13px; font-weight: 700;
  color: rgba(255,255,255,0.65);
  margin-bottom: 18px; letter-spacing: 0.02em;
}
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 10px; }
.footer-col a {
  font-size: 13px; color: #475569; text-decoration: none;
  transition: 0.2s; display: inline-block;
}
.footer-col a:hover { color: var(--txt-white); transform: translateX(3px); }
.footer-contact li {
  list-style: none; display: flex; gap: 9px;
  color: #475569; font-size: 13px;
  margin-bottom: 11px; align-items: flex-start;
}
.fc-icon { opacity: 0.5; flex-shrink: 0; margin-top: 1px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 24px;
  display: flex; justify-content: space-between;
  align-items: center; flex-wrap: wrap; gap: 12px;
}
.footer-bottom p,
.footer-bottom a {
  font-size: 12px; color: #334155;
  text-decoration: none; transition: color 0.2s;
}
.footer-bottom a:hover { color: rgba(255,255,255,0.6); }
.footer-icp { display: flex; gap: 20px; }

/* 回顶 */
#back-top {
  position: fixed; bottom: 32px; right: 32px;
  width: 44px; height: 44px; border-radius: 10px;
  background: rgba(255,255,255,0.9);
  border: 1px solid var(--border-light);
  color: var(--txt-dark); font-size: 18px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; z-index: 99;
  opacity: 0; transform: translateY(12px);
  transition: opacity 0.3s, transform 0.3s, box-shadow 0.25s;
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}
#back-top.show { opacity: 1; transform: translateY(0); }
#back-top:hover { box-shadow: 0 8px 24px rgba(0,0,0,0.15); }

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 960px) {
  .srv { grid-template-columns: 1fr; }
  .srv.flip { direction: ltr; }
  .srv:not(.flip) .srv-text { border-right: none; border-bottom: 1px solid var(--border-light); }
  .srv.flip .srv-text      { border-left: none; border-bottom: 1px solid var(--border-light); }
  .srv-image { min-height: 300px; }
  .about-grid { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .wrap { padding: 0 24px; }
  .nav-inner { padding: 0 24px; }
  #hero { padding: 110px 24px 80px; }
  .hero-stats { flex-direction: column; width: 100%; }
  .hstat { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.08); }
  .srv-text { padding: 48px 28px; }
  .srv-image { padding: 36px 24px; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-inner { padding: 48px 28px; }
}