/* ==========================================================================
   幻天领域 · 进化柔性 UI（Soft UI Evolution）设计系统
   单色底 + 双向柔和阴影（亮/暗各一层）· 圆角 10px · Nunito
   ========================================================================== */

:root {
  --wcag-level: "AA+";
  --contrast-ratio: 4.5;

  --bg: #E9EFF6;
  --bg-deep: #E2EAF3;
  --card: #FBFDFF;
  --ink: #1F2A37;
  --ink-soft: #43566B;
  --line: #C9D7E4;
  --accent: #0F609B;
  --accent-deep: #0B4A73;
  --accent-soft: #D9EBF8;

  --radius: 10px;

  /* 双向柔和阴影：暗层 + 亮层 */
  --shadow-out: 6px 6px 14px rgba(160, 178, 198, .55), -6px -6px 14px rgba(255, 255, 255, .95);
  --shadow-out-sm: 4px 4px 10px rgba(160, 178, 198, .42), -4px -4px 10px rgba(255, 255, 255, .88);
  --shadow-in: inset 4px 4px 10px rgba(160, 178, 198, .5), inset -4px -4px 10px rgba(255, 255, 255, .95);
  --shadow-accent: 4px 4px 10px rgba(15, 96, 155, .35), -4px -4px 10px rgba(255, 255, 255, .65);

  --dur: 240ms;
  --ease: cubic-bezier(.4, 0, .2, 1);

  --container: 1200px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Nunito', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }

a { color: var(--accent); text-decoration: none; transition: color var(--dur) var(--ease); }
a:hover { color: var(--accent-deep); }

ul, ol { list-style: none; }

h1, h2, h3, h4 { line-height: 1.2; font-weight: 700; color: var(--ink); }

p { max-width: 34em; }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  background: var(--accent);
  color: #fff;
  padding: 12px 20px;
  border-radius: 0 0 var(--radius) 0;
  font-weight: 700;
}
.skip-link:focus { left: 0; color: #fff; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(233, 239, 246, .88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 20px;
  color: var(--ink);
  letter-spacing: .02em;
}
.brand:hover { color: var(--accent-deep); }
.brand svg { color: var(--accent); flex: none; }

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow-out-sm);
  cursor: pointer;
  color: var(--ink-soft);
  align-items: center;
  justify-content: center;
  transition: box-shadow var(--dur) var(--ease);
}
.nav-toggle:active { box-shadow: var(--shadow-in); }

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-menu a:not(.btn) {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 14px;
  border-radius: var(--radius);
  color: var(--ink-soft);
  font-weight: 700;
  font-size: 15px;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.nav-menu a:not(.btn):hover {
  color: var(--accent-deep);
  background: var(--accent-soft);
}
.nav-menu a.is-active {
  color: var(--accent-deep);
  background: var(--accent-soft);
  box-shadow: var(--shadow-in);
}

.nav-cta { margin-left: 8px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 12px 26px;
  border: none;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.btn svg { flex: none; }

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow-accent);
}
.btn-primary:hover {
  background: var(--accent-deep);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 6px 6px 14px rgba(15, 96, 155, .45), -6px -6px 14px rgba(255, 255, 255, .75);
}
.btn-primary:active {
  transform: translateY(0) scale(.98);
  box-shadow: inset 3px 3px 8px rgba(11, 74, 115, .6);
}

.btn-secondary {
  background: var(--card);
  color: var(--accent);
  box-shadow: var(--shadow-out-sm);
}
.btn-secondary:hover {
  color: var(--accent-deep);
  transform: translateY(-2px);
  box-shadow: var(--shadow-out);
}
.btn-secondary:active {
  transform: translateY(0) scale(.98);
  box-shadow: var(--shadow-in);
}

.btn-ghost {
  background: transparent;
  color: var(--accent);
  box-shadow: none;
}
.btn-ghost:hover {
  color: var(--accent-deep);
  background: var(--accent-soft);
}
.btn-ghost:active { box-shadow: var(--shadow-in); }

.btn[disabled], .btn.is-disabled {
  opacity: .55;
  cursor: not-allowed;
  transform: none;
  pointer-events: none;
}

.btn-sm { min-height: 44px; padding: 8px 20px; font-size: 14px; }
.btn-lg { min-height: 52px; padding: 14px 32px; font-size: 16px; }

/* ---------- 通用区块 ---------- */
.section { padding: 72px 0; }
.section-alt { background: var(--bg-deep); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.section-head { max-width: 640px; margin-bottom: 40px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head.center p { margin-left: auto; margin-right: auto; }

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-title { font-size: clamp(1.5rem, 3vw, 2rem); margin-bottom: 12px; }
.section-desc { color: var(--ink-soft); font-size: 16px; }

/* ---------- Hero ---------- */
.hero { padding: 88px 0 72px; overflow: hidden; }

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 48px;
  align-items: center;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 999px;
  background: var(--card);
  box-shadow: var(--shadow-out-sm);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 24px;
}
.hero-eyebrow svg { color: var(--accent); }

.hero-title {
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -.01em;
  margin-bottom: 20px;
}
.hero-title em { font-style: normal; color: var(--accent); }

.hero-desc {
  font-size: 18px;
  color: var(--ink-soft);
  margin-bottom: 32px;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 40px; }

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
}
.hero-meta .meta-item { display: flex; flex-direction: column; gap: 2px; }
.meta-num { font-size: 24px; font-weight: 800; color: var(--accent-deep); line-height: 1.2; }
.meta-label { font-size: 13px; color: var(--ink-soft); font-weight: 500; }

/* Hero 纯 CSS 新拟态装饰 */
.hero-visual {
  position: relative;
  width: 100%;
  max-width: 440px;
  aspect-ratio: 1;
  margin: 0 auto;
}

.orb {
  position: absolute;
  border-radius: 50%;
  background: var(--bg);
}

.orb-ring {
  border: 2px solid var(--line);
  box-shadow: var(--shadow-out-sm);
  background: transparent;
}

.orb-raised { box-shadow: var(--shadow-out); background: var(--card); }
.orb-sunken { box-shadow: var(--shadow-in); }

.orb-accent {
  background: var(--accent);
  box-shadow: 8px 8px 18px rgba(15, 96, 155, .4), -6px -6px 14px rgba(255, 255, 255, .7);
}
.orb-accent::after {
  content: "";
  position: absolute;
  inset: 22%;
  border-radius: 50%;
  background: var(--bg);
  box-shadow: var(--shadow-in);
}

.orb-dot {
  background: var(--accent-soft);
  box-shadow: var(--shadow-out-sm);
}

.anim-float { animation: float 6s var(--ease) infinite; }
.anim-float-slow { animation: float 8s var(--ease) infinite; }
.anim-float-slower { animation: float 10s var(--ease) infinite; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}

/* ---------- 信息条 chips ---------- */
.chips-bar { padding: 32px 0 8px; }

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 20px;
  border-radius: 999px;
  background: var(--card);
  box-shadow: var(--shadow-out-sm);
  font-size: 13px;
  font-weight: 700;
  color: var(--ink-soft);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.chip:hover { transform: translateY(-2px); box-shadow: var(--shadow-out); }
.chip svg { color: var(--accent); flex: none; }

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

.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-out);
  padding: 24px;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 8px 8px 18px rgba(160, 178, 198, .6), -8px -8px 18px rgba(255, 255, 255, 1);
}

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  background: var(--bg);
  box-shadow: var(--shadow-in);
  margin-bottom: 20px;
}

.card-title { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.card-text { font-size: 15px; color: var(--ink-soft); }
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-weight: 700;
  font-size: 14px;
}
.card-link svg { transition: transform var(--dur) var(--ease); }
.card-link:hover svg { transform: translateX(4px); }

/* 服务卡片 */
.service-card { display: flex; flex-direction: column; }
.service-card .card-text { flex: 1; }
.service-card .feature-list { margin: 16px 0 8px; }
.service-card .feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 14px;
  color: var(--ink-soft);
  padding: 6px 0;
}
.feature-list svg { color: var(--accent); flex: none; margin-top: 3px; }

/* ---------- 团队卡片 ---------- */
.team-card { text-align: center; }

.avatar {
  width: 88px;
  height: 88px;
  margin: 0 auto 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 800;
  color: var(--accent-deep);
  background: var(--accent-soft);
  box-shadow: var(--shadow-out-sm);
}

.team-role {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: var(--accent-deep);
  background: var(--accent-soft);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
}
.team-bio { font-size: 14px; color: var(--ink-soft); }

/* ---------- 控件展示区 ---------- */
.demo-panel {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-out);
  padding: 32px;
}

.demo-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}
.demo-row:last-child { border-bottom: none; }
.demo-row-label {
  width: 120px;
  flex: none;
  font-size: 13px;
  font-weight: 700;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: .08em;
}

/* 开关 Toggle */
.switch {
  position: relative;
  width: 56px;
  height: 30px;
  flex: none;
  border: none;
  border-radius: 999px;
  background: var(--bg);
  box-shadow: var(--shadow-in);
  cursor: pointer;
  transition: background var(--dur) var(--ease);
}
.switch::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--card);
  box-shadow: 2px 2px 6px rgba(160, 178, 198, .55), -2px -2px 6px rgba(255, 255, 255, .9);
  transition: transform var(--dur) var(--ease);
}
.switch[aria-checked="true"] { background: var(--accent-soft); }
.switch[aria-checked="true"]::after { transform: translateX(26px); background: var(--accent); }
.switch[disabled] { opacity: .55; cursor: not-allowed; }

.switch-group { display: flex; align-items: center; gap: 12px; }
.switch-state { font-size: 14px; font-weight: 700; color: var(--ink-soft); min-width: 2.5em; }

/* 徽标 Badge */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.badge-accent { background: var(--accent-soft); color: var(--accent-deep); box-shadow: var(--shadow-out-sm); }
.badge-solid { background: var(--accent); color: #fff; box-shadow: var(--shadow-accent); }
.badge-outline { background: var(--card); color: var(--ink-soft); box-shadow: var(--shadow-in); }

/* ---------- 表单 ---------- */
.form-card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-out);
  padding: 32px;
}

.field { margin-bottom: 20px; }
.field label {
  display: block;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 8px;
}
.field .hint { font-size: 13px; color: var(--ink-soft); font-weight: 500; margin-left: 8px; }

.field input,
.field textarea,
.field select {
  width: 100%;
  min-height: 48px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg);
  box-shadow: var(--shadow-in);
  font-family: inherit;
  font-size: 15px;
  color: var(--ink);
  transition: box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.field textarea { min-height: 128px; resize: vertical; }
.field input::placeholder, .field textarea::placeholder { color: #8A9BB0; }
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: var(--shadow-in), 0 0 0 3px var(--accent-soft);
}

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 20px; }

.form-note { font-size: 13px; color: var(--ink-soft); margin-top: 12px; }

.form-status {
  display: none;
  margin-top: 16px;
  padding: 14px 18px;
  border-radius: var(--radius);
  background: var(--accent-soft);
  color: var(--accent-deep);
  font-weight: 700;
  font-size: 14px;
  box-shadow: var(--shadow-out-sm);
}
.form-status.is-visible { display: flex; align-items: center; gap: 8px; }

/* ---------- 页头（子页面） ---------- */
.page-hero { padding: 64px 0 56px; border-bottom: 1px solid var(--line); }
.page-hero .hero-title { font-size: clamp(1.8rem, 4vw, 2.8rem); }
.page-hero p { color: var(--ink-soft); font-size: 17px; }

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--ink-soft);
  margin-bottom: 24px;
}
.breadcrumb a { color: var(--accent); }
.breadcrumb .sep { color: var(--line); }

/* ---------- 关于页 ---------- */
.value-card { text-align: left; }

.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-box {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-out);
  padding: 24px;
  text-align: center;
}
.stat-num { font-size: 32px; font-weight: 900; color: var(--accent-deep); line-height: 1.2; }
.stat-label { font-size: 14px; color: var(--ink-soft); font-weight: 500; margin-top: 4px; }

.timeline { position: relative; max-width: 720px; margin: 0 auto; padding-left: 32px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--line);
}
.timeline-item { position: relative; padding-bottom: 32px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--card);
  box-shadow: var(--shadow-out-sm);
  border: 3px solid var(--accent);
}
.timeline-year { font-size: 14px; font-weight: 800; color: var(--accent); margin-bottom: 4px; }
.timeline-title { font-size: 18px; font-weight: 700; margin-bottom: 6px; }
.timeline-text { font-size: 15px; color: var(--ink-soft); }

/* ---------- 服务详情页 ---------- */
.detail-hero {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 48px;
  align-items: center;
}
.detail-visual {
  position: relative;
  width: 100%;
  max-width: 320px;
  aspect-ratio: 1;
  margin: 0 auto;
}

.detail-body p { margin-bottom: 16px; color: var(--ink-soft); }
.detail-body h2 { font-size: 1.5rem; margin: 40px 0 16px; }

.faq-item {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-out-sm);
  margin-bottom: 16px;
  overflow: hidden;
}
.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 24px;
  font-weight: 700;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 44px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary svg { flex: none; color: var(--accent); transition: transform var(--dur) var(--ease); }
.faq-item[open] summary svg { transform: rotate(180deg); }
.faq-item .faq-answer { padding: 0 24px 20px; color: var(--ink-soft); font-size: 15px; }

.related-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }

/* ---------- 联系页 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 32px;
  align-items: start;
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}
.contact-info-item:last-child { border-bottom: none; }
.contact-info-icon {
  width: 48px;
  height: 48px;
  flex: none;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  background: var(--bg);
  box-shadow: var(--shadow-in);
}
.contact-info-label { font-size: 13px; font-weight: 700; color: var(--ink-soft); text-transform: uppercase; letter-spacing: .08em; margin-bottom: 4px; }
.contact-info-value { font-size: 15px; font-weight: 700; }

/* ---------- CTA 区 ---------- */
.cta-band {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-out);
  padding: 48px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.cta-band h2 { font-size: clamp(1.4rem, 3vw, 1.9rem); margin-bottom: 8px; }
.cta-band p { color: var(--ink-soft); }

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--ink);
  color: #C9D7E4;
  padding: 56px 0 32px;
  margin-top: 72px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 20px;
  color: #fff;
  margin-bottom: 16px;
}
.footer-brand svg { color: #7FB5E0; }

.footer-desc { font-size: 14px; color: #A9BCCF; max-width: 30em; }

.footer-title {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: .1em;
  margin-bottom: 16px;
}

.footer-links li { margin-bottom: 4px; }
.footer-links a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  color: #C9D7E4;
  font-size: 14px;
  transition: color var(--dur) var(--ease);
}
.footer-links a:hover { color: #fff; }

.footer-bottom {
  border-top: 1px solid rgba(201, 215, 228, .2);
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  font-size: 13px;
  color: #8FA5BA;
}

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .detail-hero, .contact-grid { grid-template-columns: 1fr; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { max-width: 340px; }
}

@media (max-width: 880px) {
  .nav-toggle { display: flex; }

  .nav-menu {
    display: none;
    position: absolute;
    top: calc(100% + 1px);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    padding: 16px 24px 24px;
    gap: 4px;
    box-shadow: 0 12px 24px rgba(160, 178, 198, .35);
  }
  .nav-menu.is-open { display: flex; }
  .nav-menu a:not(.btn) { width: 100%; }
  .nav-cta { margin: 8px 0 0; width: 100%; }
}

@media (max-width: 640px) {
  .section { padding: 56px 0; }
  .hero { padding: 56px 0 48px; }

  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: 1fr 1fr; gap: 16px; }
  .form-grid { grid-template-columns: 1fr; }

  .hero-actions .btn { width: 100%; }
  .hero-meta { gap: 16px 24px; }

  .demo-row-label { width: 100%; margin-bottom: 4px; }

  .cta-band { padding: 32px 24px; }
  .cta-band .btn { width: 100%; }

  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; }

  .form-card, .demo-panel { padding: 24px; }
}

/* ---------- 产品目录 ---------- */
.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.product-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 36px;
  padding: 6px 14px;
  border-radius: var(--radius);
  background: var(--bg);
  box-shadow: var(--shadow-in);
  font-size: 13px;
  font-weight: 700;
  color: var(--ink-soft);
}
.product-tag.is-hot {
  background: var(--accent-soft);
  color: var(--accent-deep);
  box-shadow: var(--shadow-out-sm);
}

.product-group-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.product-group-head svg { color: var(--accent); flex: none; }
.product-group-head h3 { font-size: 18px; }

/* ---------- 站点入口卡片 ---------- */
.site-link-card { display: flex; flex-direction: column; }
.site-link-card .card-text { flex: 1; }
.site-url {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  font-weight: 700;
  font-size: 14px;
  color: var(--accent);
  word-break: break-all;
}
.site-url svg { flex: none; }

/* ---------- 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}