/* ==========================================================
   杭州顺治科技股份有限公司 · 企业官网
   Brand: #0071B6 / #C12C1D
   ========================================================== */

:root {
  --primary: #0071b6;
  --primary-600: #005f9b;
  --primary-700: #004b7a;
  --primary-900: #06263c;
  --accent: #c12c1d;
  --teal: #0e9f9a;
  --amber: #e8842c;
  --ink: #0c1b2a;
  --body: #4a5d70;
  --muted: #7d8f9f;
  --line: #e3ecf3;
  --bg: #f6fafd;
  --white: #ffffff;
  --radius: 18px;
  --radius-sm: 12px;
  --shadow-sm: 0 6px 20px rgba(12, 39, 60, 0.06);
  --shadow: 0 18px 50px rgba(12, 39, 60, 0.1);
  --container: 1200px;
  --header-h: 76px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: var(--ink);
  background: var(--white);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; color: inherit; }
h1, h2, h3, h4, p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

::selection { background: rgba(0, 113, 182, 0.18); }

.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 999;
  background: var(--primary);
  color: #fff;
  padding: 10px 18px;
  border-radius: 8px;
  transition: top 0.2s;
}
.skip-link:focus { top: 12px; }

.container {
  width: min(var(--container), calc(100% - 48px));
  margin: 0 auto;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid rgba(227, 236, 243, 0.9);
  transition: box-shadow 0.3s var(--ease);
}
.site-header.is-scrolled { box-shadow: 0 8px 30px rgba(12, 39, 60, 0.08); }

.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}
.brand img { height: 38px; width: auto; }

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.site-nav a {
  position: relative;
  padding: 8px 14px;
  font-size: 15px;
  color: #2c4357;
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
  white-space: nowrap;
}
.site-nav a:hover { color: var(--primary); background: rgba(0, 113, 182, 0.06); }
.site-nav a.active { color: var(--primary); font-weight: 600; }
.site-nav a.active::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
}

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-left: 12px;
  padding: 10px 20px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 8px 18px rgba(0, 113, 182, 0.24);
  transition: transform 0.2s var(--ease), background 0.2s;
}
.header-cta:hover { background: var(--primary-600); transform: translateY(-1px); }
.header-cta svg { width: 16px; height: 16px; }

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  position: relative;
  transition: transform 0.25s var(--ease), opacity 0.2s;
}
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }
.nav-open .nav-toggle span { background: transparent; }
.nav-open .nav-toggle span::before { transform: translateY(6px) rotate(45deg); }
.nav-open .nav-toggle span::after { transform: translateY(-6px) rotate(-45deg); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 48px;
  padding: 12px 26px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s var(--ease), background 0.2s, box-shadow 0.2s,
    border-color 0.2s, color 0.2s;
}
.btn svg { width: 17px; height: 17px; }
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 12px 26px rgba(0, 113, 182, 0.28);
}
.btn-primary:hover { background: var(--primary-600); transform: translateY(-2px); }
.btn-ghost {
  border-color: rgba(255, 255, 255, 0.42);
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.14); transform: translateY(-2px); }
.btn-outline {
  border-color: var(--line);
  color: var(--primary);
  background: #fff;
}
.btn-outline:hover { border-color: var(--primary); background: rgba(0, 113, 182, 0.04); transform: translateY(-2px); }
.btn-light { background: #fff; color: var(--primary-700); box-shadow: 0 12px 26px rgba(0, 0, 0, 0.12); }
.btn-light:hover { transform: translateY(-2px); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: calc(var(--header-h) + 86px) 0 0;
  min-height: 720px;
  background:
    linear-gradient(100deg, rgba(5, 26, 43, 0.96) 0%, rgba(6, 42, 68, 0.9) 46%, rgba(6, 42, 68, 0.55) 100%),
    url("https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=modern%20Chinese%20smart%20campus%20at%20golden%20hour%2C%20contemporary%20school%20architecture%20with%20glass%20facade%2C%20students%20walking%20across%20a%20bright%20plaza%2C%20clean%20minimal%2C%20blue%20sky%2C%20photorealistic%20wide%20angle&image_size=landscape_16_9")
      center / cover no-repeat;
  color: #fff;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.16) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: linear-gradient(90deg, #000, transparent 62%);
  -webkit-mask-image: linear-gradient(90deg, #000, transparent 62%);
  opacity: 0.5;
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  width: 720px;
  height: 720px;
  right: -220px;
  top: -240px;
  background: radial-gradient(circle, rgba(0, 155, 216, 0.35), transparent 62%);
  filter: blur(10px);
  pointer-events: none;
}
.hero .container { position: relative; z-index: 2; }

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 56px;
  align-items: center;
  padding-bottom: 72px;
}

.eyebrow-badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 15px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.09);
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.9);
}
.eyebrow-badge .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #49d6c5;
  box-shadow: 0 0 0 5px rgba(73, 214, 197, 0.14);
}

.hero h1 {
  margin: 26px 0 20px;
  font-size: clamp(38px, 5vw, 64px);
  line-height: 1.14;
  letter-spacing: 0.01em;
  font-weight: 700;
}
.hero h1 .accent {
  position: relative;
  color: #7fd4ff;
  white-space: nowrap;
}
.hero h1 .accent::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 4px;
  height: 8px;
  background: linear-gradient(90deg, rgba(0, 161, 224, 0.55), rgba(0, 161, 224, 0));
  border-radius: 4px;
  z-index: -1;
}
.hero-lead {
  max-width: 600px;
  font-size: 17px;
  line-height: 1.9;
  color: rgba(232, 243, 250, 0.86);
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}
.hero-note {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin-top: 30px;
  color: rgba(232, 243, 250, 0.72);
  font-size: 13px;
}
.hero-note span { display: inline-flex; align-items: center; gap: 8px; }
.hero-note svg { width: 15px; height: 15px; color: #57d3c3; }

/* hero visual / dashboard */
.hero-visual {
  position: relative;
  min-height: 420px;
}
.glass-card {
  position: relative;
  background: rgba(255, 255, 255, 0.96);
  color: var(--ink);
  border-radius: 20px;
  box-shadow: 0 30px 70px rgba(0, 12, 24, 0.38);
  overflow: hidden;
}
.panel-top {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 15px 18px;
  border-bottom: 1px solid #edf3f8;
  background: #f8fbfd;
}
.panel-top i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #dbe6ee;
}
.panel-top i:nth-child(1) { background: #ff7d6e; }
.panel-top i:nth-child(2) { background: #ffc75f; }
.panel-top i:nth-child(3) { background: #54d39a; }
.panel-top span {
  margin-left: 8px;
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.04em;
}
.panel-body { padding: 22px; }
.panel-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.panel-title strong { font-size: 15px; }
.panel-title em {
  font-style: normal;
  font-size: 11px;
  color: var(--primary);
  background: rgba(0, 113, 182, 0.09);
  padding: 4px 10px;
  border-radius: 999px;
}
.metric-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 18px;
}
.metric {
  background: #f5f9fc;
  border: 1px solid #edf3f8;
  border-radius: 12px;
  padding: 12px;
}
.metric b { display: block; font-size: 20px; color: var(--primary-700); line-height: 1.3; }
.metric small { font-size: 11px; color: var(--muted); }
.chart {
  display: flex;
  align-items: flex-end;
  gap: 9px;
  height: 104px;
  padding: 12px 12px 0;
  background: linear-gradient(180deg, #f7fbfe, #fff);
  border: 1px solid #edf3f8;
  border-radius: 12px;
}
.chart i {
  flex: 1;
  border-radius: 6px 6px 0 0;
  background: linear-gradient(180deg, #39b3e6, #0071b6);
  opacity: 0.85;
}
.chart i:nth-child(2n) { background: linear-gradient(180deg, #6fd7c8, #0e9f9a); }
.chart i:nth-child(4n) { background: linear-gradient(180deg, #ffc27a, #e8842c); }
.chart i:nth-child(1) { height: 42%; }
.chart i:nth-child(2) { height: 64%; }
.chart i:nth-child(3) { height: 50%; }
.chart i:nth-child(4) { height: 76%; }
.chart i:nth-child(5) { height: 58%; }
.chart i:nth-child(6) { height: 88%; }
.chart i:nth-child(7) { height: 70%; }
.chart i:nth-child(8) { height: 96%; }

.float-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 16px;
  background: rgba(255, 255, 255, 0.97);
  color: var(--ink);
  border-radius: 14px;
  box-shadow: 0 18px 44px rgba(0, 12, 24, 0.26);
  font-size: 13px;
  animation: floaty 6s ease-in-out infinite;
}
.float-card .fc-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: rgba(0, 113, 182, 0.1);
  color: var(--primary);
}
.float-card .fc-icon svg { width: 20px; height: 20px; }
.float-card b { display: block; font-size: 13px; }
.float-card small { color: var(--muted); font-size: 11px; }
.float-card.one { left: -34px; bottom: 54px; }
.float-card.two { right: -18px; top: 40px; animation-delay: -3s; }
.float-card.two .fc-icon { background: rgba(14, 159, 154, 0.12); color: var(--teal); }
@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* hero bottom stats */
.hero-stats {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid rgba(255, 255, 255, 0.16);
}
.hero-stats .stat {
  padding: 26px 10px 30px;
  border-right: 1px solid rgba(255, 255, 255, 0.12);
}
.hero-stats .stat:last-child { border-right: 0; }
.hero-stats b {
  display: block;
  font-size: clamp(26px, 3vw, 38px);
  line-height: 1.2;
  letter-spacing: 0.01em;
}
.hero-stats b em { font-style: normal; font-size: 0.55em; margin-left: 2px; color: #7fd4ff; }
.hero-stats span { font-size: 13px; color: rgba(232, 243, 250, 0.66); }

/* ---------- Page hero (sub pages) ---------- */
.page-hero {
  position: relative;
  padding: calc(var(--header-h) + 72px) 0 66px;
  background:
    linear-gradient(105deg, rgba(5, 26, 43, 0.96), rgba(6, 54, 86, 0.88)),
    url("https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=abstract%20digital%20education%20background%2C%20soft%20blue%20gradient%20with%20subtle%20network%20lines%20and%20light%20particles%2C%20minimal%20technology%20visual%2C%20clean%2C%20high%20quality&image_size=landscape_16_9")
      center / cover no-repeat;
  color: #fff;
  overflow: hidden;
}
.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.14) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(90deg, #000, transparent 70%);
  -webkit-mask-image: linear-gradient(90deg, #000, transparent 70%);
  opacity: 0.45;
}
.page-hero .container { position: relative; z-index: 2; }
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.62);
  margin-bottom: 18px;
}
.breadcrumb a:hover { color: #fff; }
.breadcrumb span { opacity: 0.5; }
.page-hero h1 { font-size: clamp(32px, 4vw, 48px); line-height: 1.25; }
.page-hero p {
  max-width: 720px;
  margin-top: 16px;
  color: rgba(232, 243, 250, 0.82);
  font-size: 16.5px;
}

/* ---------- Sections ---------- */
.section { padding: 96px 0; }
.section.tight { padding: 72px 0; }
.section.alt { background: var(--bg); }

.section-head {
  max-width: 760px;
  margin: 0 auto 52px;
  text-align: center;
}
.section-head.left { margin-left: 0; text-align: left; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}
.section-head h2 {
  margin: 14px 0 14px;
  font-size: clamp(28px, 3.4vw, 40px);
  line-height: 1.3;
  letter-spacing: 0.01em;
}
.section-head p {
  color: var(--body);
  font-size: 16px;
}

/* ---------- Trust bar ---------- */
.trustbar {
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.trustbar-inner {
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 22px 0;
  flex-wrap: wrap;
  justify-content: space-between;
}
.trustbar-label {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.08em;
  white-space: nowrap;
}
.trust-items {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
}
.trust-items span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  color: #3d5468;
  background: #fbfdff;
}
.trust-items svg { width: 15px; height: 15px; color: var(--primary); }

/* ---------- About split ---------- */
.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 64px;
  align-items: center;
}
.about-media {
  position: relative;
  padding-bottom: 26px;
}
.about-media .main-img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.about-media .frame {
  position: absolute;
  inset: 22px -22px -22px 22px;
  border: 1px solid rgba(0, 113, 182, 0.3);
  border-radius: var(--radius);
  z-index: -1;
}
.about-badge {
  position: absolute;
  left: -18px;
  bottom: 4px;
  background: var(--primary);
  color: #fff;
  border-radius: 14px;
  padding: 16px 22px;
  box-shadow: 0 16px 36px rgba(0, 113, 182, 0.32);
}
.about-badge b { display: block; font-size: 30px; line-height: 1.1; }
.about-badge span { font-size: 12px; opacity: 0.85; letter-spacing: 0.06em; }

.about-copy h2 {
  font-size: clamp(28px, 3.4vw, 40px);
  line-height: 1.3;
  margin: 14px 0 18px;
}
.about-copy p { color: var(--body); margin-bottom: 16px; }
.check-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 20px;
  margin: 26px 0 32px;
}
.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14.5px;
  color: #2f4659;
}
.check-list svg {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin-top: 4px;
  color: var(--primary);
}

/* ---------- Product cards ---------- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.product-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 28px 26px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease),
    border-color 0.3s;
}
.product-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, var(--pc, var(--primary)), transparent 85%);
}
.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: rgba(0, 113, 182, 0.28);
}
.product-card .icon-box {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: color-mix(in srgb, var(--pc, var(--primary)) 10%, white);
  color: var(--pc, var(--primary));
  margin-bottom: 20px;
}
.product-card .icon-box svg { width: 26px; height: 26px; }
.product-card h3 {
  font-size: 21px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.product-card h3 small {
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.08em;
  padding: 2px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
}
.product-card .desc {
  color: var(--body);
  font-size: 14.5px;
  margin: 12px 0 18px;
}
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.tag-row span {
  font-size: 12px;
  color: #3d5468;
  background: #f3f8fb;
  border-radius: 6px;
  padding: 4px 9px;
}
.product-link {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--pc, var(--primary));
}
.product-link svg { width: 16px; height: 16px; transition: transform 0.2s; }
.product-link:hover svg { transform: translateX(4px); }

/* ---------- Feature cards ---------- */
.feature-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 26px 24px;
  transition: transform 0.25s var(--ease), box-shadow 0.25s;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-sm); }
.feature-card .icon-box {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: rgba(0, 113, 182, 0.08);
  color: var(--primary);
  margin-bottom: 16px;
}
.feature-card .icon-box svg { width: 23px; height: 23px; }
.feature-card h3 { font-size: 17px; margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--body); }

/* ---------- Stats band ---------- */
.stats-band {
  background:
    linear-gradient(105deg, rgba(5, 36, 58, 0.97), rgba(0, 83, 126, 0.94)),
    url("https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=abstract%20blue%20technology%20network%20background%2C%20data%20lines%20and%20glowing%20nodes%2C%20dark%20navy%2C%20minimal%2C%20high%20quality&image_size=landscape_16_9")
      center / cover no-repeat;
  color: #fff;
  padding: 66px 0;
}
.stats-band-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stats-band .item { text-align: center; padding: 8px 12px; }
.stats-band b {
  display: block;
  font-size: clamp(30px, 3.6vw, 46px);
  line-height: 1.15;
  color: #fff;
}
.stats-band b em { font-style: normal; font-size: 0.5em; color: #7fd4ff; margin-left: 3px; }
.stats-band span { color: rgba(230, 242, 249, 0.72); font-size: 14px; }

/* ---------- Timeline ---------- */
.timeline { position: relative; margin-top: 10px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--line) 6%, var(--line) 94%, transparent);
}
.tl-item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 66px;
  padding: 22px 0;
}
.tl-item::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 34px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--primary);
  transform: translateX(-50%);
  box-shadow: 0 0 0 5px rgba(0, 113, 182, 0.08);
}
.tl-year {
  font-size: 26px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.3;
}
.tl-year small {
  display: block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--muted);
  text-transform: uppercase;
}
.tl-content {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 20px 22px;
  box-shadow: var(--shadow-sm);
  font-size: 14.5px;
  color: var(--body);
}
.tl-item:nth-child(odd) .tl-year { text-align: right; order: 1; }
.tl-item:nth-child(odd) .tl-content { order: 2; }
.tl-item:nth-child(even) .tl-year { order: 2; text-align: left; }
.tl-item:nth-child(even) .tl-content { order: 1; }

/* ---------- Honor cards ---------- */
.honor-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.honor {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}
.honor:hover { border-color: rgba(0, 113, 182, 0.3); box-shadow: var(--shadow-sm); transform: translateY(-3px); }
.honor .h-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: rgba(0, 113, 182, 0.08);
  color: var(--primary);
}
.honor .h-icon svg { width: 20px; height: 20px; }
.honor b { display: block; font-size: 14.5px; line-height: 1.5; }
.honor small { color: var(--muted); font-size: 12px; }

/* ---------- Solution blocks ---------- */
.solution-card {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 22px;
  padding: 30px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s var(--ease), box-shadow 0.25s;
}
.solution-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.solution-card .s-icon {
  width: 76px;
  height: 76px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, rgba(0, 113, 182, 0.12), rgba(14, 159, 154, 0.1));
  color: var(--primary);
}
.solution-card .s-icon svg { width: 34px; height: 34px; }
.solution-card h3 { font-size: 20px; margin-bottom: 8px; }
.solution-card p { color: var(--body); font-size: 14.5px; }
.solution-card ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.solution-card li {
  font-size: 12.5px;
  color: #3d5468;
  background: #f3f8fb;
  border-radius: 6px;
  padding: 4px 10px;
}

/* ---------- Process ---------- */
.process {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  counter-reset: step;
}
.process-item {
  position: relative;
  padding: 28px 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}
.process-item::before {
  counter-increment: step;
  content: "0" counter(step);
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.1em;
  margin-bottom: 18px;
}
.process-item h3 { font-size: 17px; margin-bottom: 8px; }
.process-item p { font-size: 13.5px; color: var(--body); }
.process-item:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -12px;
  top: 50%;
  width: 6px;
  height: 6px;
  border-top: 1px solid var(--primary);
  border-right: 1px solid var(--primary);
  transform: translateY(-50%) rotate(45deg);
  z-index: 2;
}

/* ---------- CTA ---------- */
.cta-band {
  position: relative;
  border-radius: 26px;
  padding: 62px 64px;
  background:
    linear-gradient(100deg, rgba(0, 71, 112, 0.97), rgba(0, 113, 182, 0.9)),
    url("https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=modern%20classroom%20with%20digital%20screens%20and%20students%2C%20bright%20blue%20tones%2C%20photorealistic%2C%20clean%20composition&image_size=landscape_16_9")
      center / cover no-repeat;
  color: #fff;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}
.cta-band::after {
  content: "";
  position: absolute;
  right: -100px;
  top: -140px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: 0 0 0 60px rgba(255, 255, 255, 0.04),
    0 0 0 120px rgba(255, 255, 255, 0.03);
}
.cta-band > * { position: relative; z-index: 2; }
.cta-band h2 { font-size: clamp(26px, 3vw, 36px); line-height: 1.35; }
.cta-band p { color: rgba(232, 243, 250, 0.8); margin-top: 10px; max-width: 620px; }
.cta-actions { display: flex; gap: 12px; flex-wrap: wrap; flex-shrink: 0; }

/* ---------- Product detail ---------- */
.product-detail {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 64px;
  align-items: center;
  padding: 72px 0;
  border-bottom: 1px solid var(--line);
}
.product-detail:last-child { border-bottom: 0; }
.product-detail.reverse .pd-copy { order: 2; }
.product-detail.reverse .pd-visual { order: 1; }
.pd-copy .prod-kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--pc, var(--primary));
  background: color-mix(in srgb, var(--pc, var(--primary)) 9%, white);
  padding: 6px 13px;
  border-radius: 999px;
}
.pd-copy h2 {
  font-size: clamp(28px, 3.4vw, 40px);
  margin: 16px 0 8px;
  line-height: 1.3;
}
.pd-copy h2 small {
  display: block;
  font-size: 13px;
  color: var(--muted);
  font-weight: 600;
  letter-spacing: 0.12em;
  margin-top: 6px;
}
.pd-copy > p { color: var(--body); }
.pd-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 18px;
  margin: 24px 0 28px;
}
.pd-features li {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  font-size: 14px;
  color: #2f4659;
}
.pd-features svg { flex-shrink: 0; width: 17px; height: 17px; margin-top: 4px; color: var(--pc, var(--primary)); }

.pd-visual {
  position: relative;
  border-radius: 22px;
  padding: 28px;
  background: linear-gradient(150deg, #eef7fd, #f8fbfd 55%, #eaf7f6);
  border: 1px solid var(--line);
  min-height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.mock-window {
  width: 100%;
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 22px 55px rgba(15, 52, 77, 0.16);
  overflow: hidden;
}
.mock-head {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 14px;
  background: #f7fafc;
  border-bottom: 1px solid #edf3f8;
}
.mock-head i { width: 8px; height: 8px; border-radius: 50%; background: #dbe6ee; }
.mock-head i:first-child { background: #ff8b7d; }
.mock-head i:nth-child(2) { background: #ffcd70; }
.mock-head i:nth-child(3) { background: #63d6a0; }
.mock-head span { margin-left: 8px; font-size: 11px; color: var(--muted); }
.mock-body { padding: 18px; }
.mock-body h4 { font-size: 13px; margin-bottom: 12px; }
.mock-list { display: grid; gap: 9px; }
.mock-list .row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 12px;
  border: 1px solid #edf3f8;
  border-radius: 9px;
  background: #fbfdff;
  font-size: 12px;
}
.mock-list .row b { font-weight: 600; }
.mock-list .pill {
  font-size: 10px;
  padding: 2px 7px;
  border-radius: 999px;
  background: rgba(0, 113, 182, 0.09);
  color: var(--primary);
}
.mock-list .pill.green { background: rgba(14, 159, 154, 0.12); color: var(--teal); }
.mock-list .pill.orange { background: rgba(232, 132, 44, 0.13); color: #b8651a; }
.mock-progress {
  height: 6px;
  border-radius: 999px;
  background: #edf3f8;
  overflow: hidden;
  margin-top: 6px;
}
.mock-progress i { display: block; height: 100%; border-radius: 999px; background: var(--primary); }
.mock-calendar {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 5px;
  margin-top: 4px;
}
.mock-calendar span {
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  font-size: 9px;
  color: var(--muted);
  border-radius: 5px;
  background: #f7fafc;
}
.mock-calendar span.on { background: rgba(0, 113, 182, 0.12); color: var(--primary); font-weight: 700; }
.mock-calendar span.hot { background: var(--primary); color: #fff; }

/* ---------- Careers ---------- */
.job-family {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 26px;
  transition: transform 0.2s, box-shadow 0.2s;
}
.job-family:hover { transform: translateY(-3px); box-shadow: var(--shadow-sm); }
.job-family .j-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: rgba(0, 113, 182, 0.08);
  color: var(--primary);
  margin-bottom: 16px;
}
.job-family .j-icon svg { width: 22px; height: 22px; }
.job-family h3 { font-size: 17px; margin-bottom: 6px; }
.job-family p { font-size: 13.5px; color: var(--body); }
.job-family .j-meta {
  margin-top: 14px;
  font-size: 12px;
  color: var(--muted);
  display: flex;
  gap: 14px;
}

.benefit {
  display: flex;
  gap: 16px;
  padding: 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}
.benefit .b-icon {
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: rgba(14, 159, 154, 0.1);
  color: var(--teal);
}
.benefit .b-icon svg { width: 21px; height: 21px; }
.benefit h3 { font-size: 16px; margin-bottom: 4px; }
.benefit p { font-size: 13.5px; color: var(--body); }

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 48px;
  align-items: start;
}
.contact-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}
.contact-info { display: grid; gap: 4px; }
.info-item {
  display: flex;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px dashed var(--line);
}
.info-item:last-child { border-bottom: 0; }
.info-item .i-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: rgba(0, 113, 182, 0.08);
  color: var(--primary);
}
.info-item .i-icon svg { width: 21px; height: 21px; }
.info-item b { display: block; font-size: 14px; margin-bottom: 3px; }
.info-item span { font-size: 14px; color: var(--body); }
.info-item a:hover { color: var(--primary); }

.form-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 34px; box-shadow: var(--shadow-sm); }
.form-card h3 { font-size: 21px; margin-bottom: 6px; }
.form-card > p { font-size: 13.5px; color: var(--muted); margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { margin-bottom: 16px; }
.field label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: #2f4659;
  margin-bottom: 7px;
}
.field label em { color: var(--accent); font-style: normal; }
.field input,
.field select,
.field textarea {
  width: 100%;
  border: 1px solid #dce7ef;
  border-radius: 10px;
  background: #fbfdff;
  padding: 12px 14px;
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}
.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(0, 113, 182, 0.1);
}
.field textarea { min-height: 132px; resize: vertical; }
.form-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 6px;
}
.form-foot small { color: var(--muted); font-size: 12px; max-width: 340px; }
.form-status {
  display: none;
  margin-top: 16px;
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 13.5px;
}
.form-status.ok { display: block; background: rgba(14, 159, 154, 0.1); color: #0b7a76; }
.form-status.err { display: block; background: rgba(193, 44, 29, 0.08); color: var(--accent); }

/* ---------- Footer ---------- */
.site-footer {
  background: #081725;
  color: rgba(223, 236, 244, 0.72);
  padding: 66px 0 26px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.25fr;
  gap: 42px;
  padding-bottom: 42px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
}
.footer-brand img { height: 40px; width: auto; margin-bottom: 18px; }
.footer-brand p { font-size: 13.5px; line-height: 1.9; max-width: 320px; }
.footer-col h4 {
  color: #fff;
  font-size: 14px;
  margin-bottom: 18px;
  letter-spacing: 0.08em;
}
.footer-col ul { display: grid; gap: 10px; }
.footer-col a { font-size: 13.5px; transition: color 0.2s; }
.footer-col a:hover { color: #7fd4ff; }
.footer-contact { display: grid; gap: 12px; font-size: 13.5px; }
.footer-contact span { display: flex; gap: 10px; }
.footer-contact svg { flex-shrink: 0; width: 16px; height: 16px; margin-top: 4px; color: #57c7e8; }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  padding-top: 24px;
  font-size: 12.5px;
  color: rgba(223, 236, 244, 0.45);
}
.footer-bottom .links { display: flex; gap: 18px; }
.icp-link { margin-left: 14px; }
.icp-link:hover { color: #fff; }
.footer-bottom a:hover { color: #fff; }

/* ---------- Reveal ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
[data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .site-nav { gap: 0; }
  .site-nav a { padding: 8px 10px; font-size: 14px; }
  .header-cta { padding: 9px 16px; }
  .hero-grid { gap: 30px; }
  .float-card.one { left: 0; }
  .float-card.two { right: 0; }
  .split { gap: 44px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .honor-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1.2fr; }
  .footer-col:last-child { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  :root { --header-h: 68px; }
  .nav-toggle { display: inline-flex; }
  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    display: grid;
    gap: 4px;
    padding: 14px 24px 22px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 20px 40px rgba(12, 39, 60, 0.1);
    transform: translateY(-130%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.35s var(--ease), opacity 0.25s;
  }
  .nav-open .site-nav {
    transform: none;
    opacity: 1;
    visibility: visible;
  }
  .site-nav a { padding: 12px 10px; font-size: 15px; }
  .site-nav a.active::after { display: none; }
  .header-cta { display: none; }
  .hero { padding-top: calc(var(--header-h) + 58px); min-height: 0; }
  .hero-grid { grid-template-columns: 1fr; gap: 48px; padding-bottom: 56px; }
  .hero-visual { min-height: 0; max-width: 560px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .hero-stats .stat:nth-child(2n) { border-right: 0; }
  .hero-stats .stat:nth-child(-n + 2) { border-bottom: 1px solid rgba(255, 255, 255, 0.12); }
  .split { grid-template-columns: 1fr; gap: 46px; }
  .about-media { max-width: 620px; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .process { grid-template-columns: 1fr 1fr; }
  .process-item:not(:last-child)::after { display: none; }
  .product-detail { grid-template-columns: 1fr; gap: 40px; padding: 56px 0; }
  .product-detail.reverse .pd-copy { order: 1; }
  .product-detail.reverse .pd-visual { order: 2; }
  .contact-grid { grid-template-columns: 1fr; }
  .cta-band { padding: 44px 34px; flex-direction: column; align-items: flex-start; }
  .timeline::before { left: 7px; }
  .tl-item { grid-template-columns: 1fr; gap: 8px; padding-left: 38px; }
  .tl-item::before { left: 7px; top: 30px; }
  .tl-item:nth-child(odd) .tl-year,
  .tl-item:nth-child(n) .tl-year { order: 0; text-align: left; }
  .tl-item:nth-child(odd) .tl-content,
  .tl-item:nth-child(n) .tl-content { order: 1; }
  .stats-band-grid { grid-template-columns: 1fr 1fr; gap: 30px 10px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 34px; }
}

@media (max-width: 640px) {
  .container { width: calc(100% - 36px); }
  .section { padding: 68px 0; }
  .section.tight { padding: 54px 0; }
  .hero h1 { font-size: 38px; }
  .hero-lead { font-size: 15.5px; }
  .hero-actions .btn { flex: 1; }
  .hero-stats b { font-size: 28px; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }
  .honor-grid { grid-template-columns: 1fr; }
  .check-list { grid-template-columns: 1fr; }
  .pd-features { grid-template-columns: 1fr; }
  .process { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .form-card, .contact-card { padding: 24px; }
  .float-card { display: none; }
  .metric-row { grid-template-columns: 1fr 1fr; }
  .metric:last-child { display: none; }
  .stats-band-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-col:last-child { grid-column: auto; }
  .cta-band { padding: 36px 26px; border-radius: 20px; }
  .breadcrumb { flex-wrap: wrap; }
  .about-badge { left: 8px; }
  .about-media .frame { display: none; }
  .solution-card { grid-template-columns: 1fr; gap: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
}