/* ===================================
   尘盈科技官网 - 暖奶油企业风格样式系统
   设计语言：暖米白底 + 咖啡墨 + 橙色 CTA（Zapier 启发）
   =================================== */

:root {
  /* 品牌色（单一橙 accent） */
  --accent: #FF4F00;
  --accent-hover: #E24600;
  --accent-soft: #FFF0E8;
  --accent-line: #FFD6BF;

  /* 文字（暖咖啡墨色阶） */
  --ink: #201515;
  --ink-2: #605D52;
  --ink-3: #939084;

  /* 背景与线条（暖奶油） */
  --bg: #FFFEFB;
  --bg-alt: #F8F4F0;
  --line: #EAE4D9;

  /* 深色块（页脚/横幅） */
  --dark: #201515;
  --dark-2: #2F2A26;

  /* 圆角：卡片/按钮 12px，输入框 6px */
  --r-card: 12px;
  --r-ctl: 6px;
  --r-pill: 999px;

  /* 阴影（暖墨色） */
  --shadow-sm: 0 1px 2px rgba(32, 21, 21, .04), 0 4px 16px rgba(32, 21, 21, .05);
  --shadow-md: 0 12px 40px rgba(32, 21, 21, .12);
  --shadow-accent: 0 10px 28px rgba(255, 79, 0, .28);

  --container: 1200px;
  --nav-h: 68px;

  --ease: cubic-bezier(.16, 1, .3, 1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
ul { list-style: none; }

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

.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }

/* 区块标题 */
.section-head {
  max-width: 720px;
  margin: 0 auto 56px;
  text-align: center;
}

.section-head.align-left { margin-left: 0; text-align: left; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 1px;
  color: var(--ink);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.eyebrow::before {
  content: '';
  width: 18px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.section-head h2 {
  font-size: 36px;
  font-weight: 600;
  letter-spacing: 0;
  line-height: 1.25;
  margin-bottom: 14px;
}

.section-head p {
  color: var(--ink-2);
  font-size: 17px;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--r-card);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all .25s var(--ease);
  white-space: nowrap;
  font-family: inherit;
}

.btn-primary {
  background: var(--accent);
  color: #FFFEFB;
  box-shadow: var(--shadow-accent);
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 14px 34px rgba(255, 79, 0, .38);
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

.btn-white {
  background: var(--bg);
  color: var(--accent);
}

.btn-white:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(0, 0, 0, .18); }

.btn-lg { padding: 15px 36px; font-size: 16px; }
.btn-block { width: 100%; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 15px;
  color: var(--accent);
}

.link-arrow svg { transition: transform .25s var(--ease); }
.link-arrow:hover svg { transform: translateX(4px); }

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-h);
  background: rgba(255, 254, 251, .88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, box-shadow .3s;
}

.navbar.scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 4px 24px rgba(32, 21, 21, .06);
}

.navbar-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.logo-img {
  width: 32px;
  height: 32px;
  display: block;
  flex-shrink: 0;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 34px;
}

.nav-link {
  color: var(--ink-2);
  font-size: 15px;
  font-weight: 500;
  position: relative;
  padding: 6px 0;
  transition: color .2s;
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
  transition: width .25s var(--ease);
}

.nav-link:hover, .nav-link.active { color: var(--ink); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

.nav-right { display: flex; align-items: center; gap: 14px; }
.nav-right .btn { padding: 9px 22px; font-size: 14px; }

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: var(--r-ctl);
  background: var(--bg);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.nav-toggle span {
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--ink);
  transition: .25s var(--ease);
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0;
  right: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
  box-shadow: var(--shadow-md);
  padding: 12px 24px 20px;
  z-index: 999;
}

.mobile-menu.open { display: block; }
.mobile-menu .nav-link { display: block; padding: 12px 0; font-size: 16px; border-bottom: 1px solid var(--bg-alt); }
.mobile-menu .btn { width: 100%; margin-top: 14px; }

/* ===== 首页 Hero ===== */
.hero {
  position: relative;
  padding: calc(var(--nav-h) + 72px) 0 96px;
  overflow: hidden;
  background:
    radial-gradient(720px 420px at 88% -10%, rgba(255, 79, 0, .10), transparent 65%),
    radial-gradient(560px 360px at -8% 110%, rgba(255, 79, 0, .06), transparent 60%),
    var(--bg);
}

.hero-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1.02fr .98fr;
  gap: 64px;
  align-items: center;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  border-radius: var(--r-pill);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-eyebrow .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent);
}

.hero-title {
  font-size: 54px;
  font-weight: 500;
  line-height: 1.16;
  letter-spacing: 0;
  margin-bottom: 22px;
}

.hero-title em {
  font-style: normal;
  color: var(--accent);
}

.hero-sub {
  font-size: 18px;
  color: var(--ink-2);
  line-height: 1.8;
  margin-bottom: 36px;
  max-width: 520px;
}

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-stats {
  display: flex;
  gap: 48px;
  margin-top: 52px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
}

.stat-item .stat-number {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.stat-item .stat-number .suffix { color: var(--accent); }
.stat-item .stat-label { font-size: 14px; color: var(--ink-3); margin-top: 2px; }

.hero-visual { position: relative; }

.hero-img {
  border-radius: var(--r-card);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--line);
  overflow: hidden;
}

.hero-img img { width: 100%; height: auto; }

.float-card {
  position: absolute;
  left: -28px;
  bottom: 32px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  box-shadow: var(--shadow-md);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.float-card .fc-icon {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.float-card .fc-num { font-weight: 700; font-size: 17px; line-height: 1.3; }
.float-card .fc-label { font-size: 12px; color: var(--ink-3); }

/* ===== 特性网格 ===== */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  padding: 32px 28px;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent-line);
}

.icon-box {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
  display: grid;
  place-items: center;
  margin-bottom: 20px;
}

.feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.feature-card p { font-size: 14.5px; color: var(--ink-2); }

/* ===== 产品卡片 ===== */
.product-card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s;
  position: relative;
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent-line);
}

.product-card.featured {
  border-color: var(--accent);
  box-shadow: 0 12px 40px rgba(255, 79, 0, .14);
}

.product-badge {
  position: absolute;
  top: -13px;
  left: 28px;
  background: var(--accent);
  color: #FFFEFB;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: var(--r-pill);
}

.tag {
  display: inline-flex;
  align-self: flex-start;
  padding: 4px 12px;
  border-radius: var(--r-pill);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 12.5px;
  font-weight: 600;
  margin-bottom: 16px;
}

.product-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 10px; }
.product-card > p { font-size: 14.5px; color: var(--ink-2); margin-bottom: 18px; }

.check-list { margin-bottom: 24px; }
.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  font-size: 14.5px;
  color: var(--ink-2);
  padding: 5px 0;
}

.check-list li svg {
  flex-shrink: 0;
  color: var(--accent);
  margin-top: 4px;
}

.product-card .link-arrow { margin-top: auto; }

/* ===== 案例卡片 ===== */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.case-card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  overflow: hidden;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
  display: flex;
  flex-direction: column;
}

.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }

.case-media {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg-alt);
}

.case-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s var(--ease);
}

.case-card:hover .case-media img { transform: scale(1.04); }

.case-body { padding: 24px; display: flex; flex-direction: column; flex: 1; }
.case-body h3 { font-size: 17.5px; font-weight: 700; margin-bottom: 8px; line-height: 1.5; }
.case-body .case-desc { font-size: 14px; color: var(--ink-2); margin-bottom: 18px; }
.case-body .link-arrow { margin-top: auto; }

.case-metrics {
  display: flex;
  gap: 24px;
  padding: 14px 0 18px;
  margin-bottom: 16px;
  border-top: 1px solid var(--bg-alt);
  border-bottom: 1px solid var(--bg-alt);
}

.case-metrics .m .m-num {
  font-size: 22px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.01em;
}

.case-metrics .m .m-label { font-size: 12.5px; color: var(--ink-3); }

/* 行业筛选 */
.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 48px;
}

.filter-tabs .tab-btn {
  padding: 9px 22px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink-2);
  font-size: 14.5px;
  font-weight: 500;
  cursor: pointer;
  transition: all .25s var(--ease);
  font-family: inherit;
}

.filter-tabs .tab-btn:hover { border-color: var(--accent); color: var(--accent); }
.filter-tabs .tab-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #FFFEFB;
  box-shadow: var(--shadow-accent);
}

/* 产品页 Tab 面板 */
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ===== CTA 横幅 ===== */
.cta-banner {
  background: linear-gradient(120deg, #201515 0%, #2F2A26 100%);
  border-radius: 12px;
  padding: 72px 64px;
  text-align: center;
  color: #FFFEFB;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -120px; right: -80px;
  width: 360px; height: 360px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .10);
}

.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -160px; left: -60px;
  width: 300px; height: 300px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .07);
}

.cta-banner h2 {
  font-size: 34px;
  font-weight: 600;
  letter-spacing: 0;
  margin-bottom: 12px;
  position: relative;
}

.cta-banner p {
  color: rgba(255, 254, 251, .75);
  font-size: 17px;
  margin-bottom: 32px;
  position: relative;
}

.cta-banner .cta-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  position: relative;
}

.btn-outline-white {
  background: transparent;
  border-color: rgba(255, 255, 255, .5);
  color: #FFFEFB;
}

.btn-outline-white:hover { border-color: #FFFEFB; background: rgba(255, 254, 251, .1); }

/* ===== 页脚 ===== */
.footer {
  background: var(--dark);
  color: rgba(255, 255, 255, .68);
  padding: 72px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer .logo { color: #FFFEFB; margin-bottom: 16px; }
.footer-desc { font-size: 14px; line-height: 1.8; max-width: 300px; }

.footer-col h4 {
  color: #FFFEFB;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 18px;
}

.footer-links li { margin-bottom: 10px; }
.footer-links a, .footer-links li {
  color: rgba(255, 255, 255, .6);
  font-size: 14px;
  transition: color .2s;
}

.footer-links a:hover { color: #FFFEFB; }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .08);
  padding: 22px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, .4);
}

.footer-bottom a { color: rgba(255, 255, 255, .4); }
.footer-bottom a:hover { color: #FFFEFB; }

/* ===== 内页 Hero ===== */
.page-hero {
  padding: calc(var(--nav-h) + 72px) 0 72px;
  background:
    radial-gradient(640px 320px at 50% -20%, rgba(255, 79, 0, .10), transparent 65%),
    var(--bg-alt);
  text-align: center;
}

.page-title {
  font-size: 44px;
  font-weight: 600;
  letter-spacing: 0;
  margin-bottom: 14px;
}

.page-subtitle { font-size: 17px; color: var(--ink-2); max-width: 640px; margin: 0 auto; }

/* 带背景横幅的页头 */
.page-hero.has-banner {
  background-color: var(--bg-alt);
  background-size: cover;
  background-position: center;
  border-bottom: 1px solid var(--line);
}

/* ===== 产品详情 ===== */
.detail-card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  padding: 40px;
  position: relative;
  transition: box-shadow .3s var(--ease), border-color .3s;
}

.detail-card:hover { box-shadow: var(--shadow-md); border-color: var(--accent-line); }
.detail-card.featured { border-color: var(--accent); }

.detail-head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
}

.detail-head h3 { font-size: 21px; font-weight: 700; }
.detail-head .tagline { font-size: 13px; color: var(--ink-3); }
.detail-desc { color: var(--ink-2); font-size: 15px; margin-bottom: 24px; }

.detail-card h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 14px;
}

.specs {
  display: flex;
  gap: 0;
  margin: 26px 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}

.specs .spec {
  flex: 1;
  padding: 16px 12px;
  text-align: center;
  background: var(--bg-alt);
}

.specs .spec + .spec { border-left: 1px solid var(--line); }
.specs .spec-num { font-size: 18px; font-weight: 700; color: var(--accent); letter-spacing: -0.01em; }
.specs .spec-label { font-size: 12.5px; color: var(--ink-3); margin-top: 2px; }

.detail-actions { display: flex; gap: 12px; margin-top: 8px; }

.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.detail-grid .detail-card.featured { grid-column: span 2; }

/* 版本对比表 */
.compare-wrap {
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  overflow: hidden;
  background: var(--bg);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}

.compare-table th, .compare-table td {
  padding: 15px 20px;
  text-align: left;
  border-bottom: 1px solid var(--bg-alt);
}

.compare-table thead th {
  background: var(--bg-alt);
  font-weight: 700;
  font-size: 15px;
}

.compare-table thead th.hl-col {
  background: var(--accent);
  color: #FFFEFB;
}

.compare-table td.hl-col { background: var(--accent-soft); font-weight: 600; color: var(--ink); }
.compare-table tbody tr:last-child td { border-bottom: none; }
.compare-table td:first-child { color: var(--ink-2); }

/* ===== 解决方案 ===== */
.solution-card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  padding: 36px 32px;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s;
  display: flex;
  flex-direction: column;
}

.solution-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent-line);
}

.solution-card h3 { font-size: 21px; font-weight: 700; margin-bottom: 10px; }
.solution-card .sol-desc { color: var(--ink-2); font-size: 14.5px; margin-bottom: 22px; }

.sol-block { margin-bottom: 22px; }
.sol-block h5 {
  font-size: 13px;
  font-weight: 700;
  color: var(--ink-3);
  letter-spacing: .06em;
  margin-bottom: 12px;
}

.plain-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--ink-2);
  margin-bottom: 7px;
}

.plain-list li::before {
  content: '';
  position: absolute;
  left: 0; top: 10px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  opacity: .55;
}

.metric-row { display: flex; gap: 20px; }
.metric-row .metric { flex: 1; background: var(--bg-alt); border-radius: 12px; padding: 14px 10px; text-align: center; }
.metric-row .metric .num { font-size: 20px; font-weight: 700; color: var(--accent); letter-spacing: -0.01em; }
.metric-row .metric .label { font-size: 12px; color: var(--ink-3); margin-top: 2px; }

.chip-row { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  padding: 5px 13px;
  border-radius: var(--r-pill);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 12.5px;
  font-weight: 500;
}

.solution-card .btn { margin-top: auto; }

/* 实施流程 */
.steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  counter-reset: step;
}

.step {
  position: relative;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  padding: 30px 22px;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}

.step:hover { transform: translateY(-4px); box-shadow: var(--shadow-sm); }

.step-num {
  font-size: 30px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.01em;
  margin-bottom: 12px;
  font-variant-numeric: tabular-nums;
}

.step h3 { font-size: 16.5px; font-weight: 700; margin-bottom: 8px; }
.step p { font-size: 13.5px; color: var(--ink-2); margin-bottom: 12px; }
.step .duration {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 3px 12px;
  border-radius: var(--r-pill);
}

/* ===== 文章/详情排版 ===== */
.prose-wrap {
  max-width: 800px;
  margin: 0 auto;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  padding: 48px;
}

.prose { color: var(--ink-2); font-size: 15.5px; line-height: 1.9; }
.prose h3 {
  color: var(--ink);
  font-size: 19px;
  font-weight: 700;
  margin: 28px 0 12px;
}

.prose h3:first-child { margin-top: 0; }
.prose p { margin-bottom: 14px; }

.quote-block {
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 12px 12px 0;
  padding: 20px 24px;
  font-style: italic;
  color: var(--ink);
  margin: 20px 0;
}

.meta-row {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--ink-3);
  font-size: 14px;
  justify-content: center;
}

.meta-row .tag { margin-bottom: 0; }

.detail-actions-center {
  display: flex;
  gap: 14px;
  justify-content: center;
  margin-top: 40px;
}

/* ===== 关于我们 ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.about-grid img {
  border-radius: var(--r-card);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}

.about-copy h2 { font-size: 30px; font-weight: 600; letter-spacing: 0; margin-bottom: 16px; }
.about-copy p { color: var(--ink-2); margin-bottom: 14px; font-size: 15.5px; }

.value-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.value-card {
  text-align: center;
  padding: 32px 20px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}

.value-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-sm); }
.value-card .icon-box { margin: 0 auto 16px; }
.value-card h3 { font-size: 16.5px; font-weight: 700; margin-bottom: 8px; }
.value-card p { font-size: 13.5px; color: var(--ink-2); }

/* ===== 联系表单 ===== */
.form-card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  padding: 40px;
  box-shadow: var(--shadow-sm);
}

.contact-layout {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 48px;
  align-items: start;
}

.contact-info h2 { font-size: 26px; font-weight: 600; margin-bottom: 14px; }
.contact-info > p { color: var(--ink-2); margin-bottom: 28px; }

.info-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--bg-alt);
}

.info-item:last-child { border-bottom: none; }
.info-item .icon-box { width: 40px; height: 40px; margin-bottom: 0; flex-shrink: 0; }
.info-item .i-label { font-size: 13px; color: var(--ink-3); }
.info-item .i-value { font-weight: 600; font-size: 15px; }

.form-group { margin-bottom: 16px; }

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-ctl);
  font-size: 15px;
  font-family: inherit;
  color: var(--ink);
  background: var(--bg);
  transition: border-color .2s, box-shadow .2s;
  outline: none;
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(255, 79, 0, .14);
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--ink-3); }

/* ===== 弹窗 ===== */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(32, 21, 21, .45);
  backdrop-filter: blur(4px);
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal-content {
  background: var(--bg);
  border-radius: 12px;
  padding: 40px;
  width: 100%;
  max-width: 460px;
  position: relative;
  box-shadow: 0 24px 80px rgba(0, 0, 0, .25);
  transform: scale(.94);
  opacity: 0;
  transition: transform .3s var(--ease), opacity .3s;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-content h2 { font-size: 24px; font-weight: 600; letter-spacing: 0; }
.modal-subtitle { color: var(--ink-2); font-size: 14.5px; margin: 8px 0 24px; }

.modal-close {
  position: absolute;
  top: 16px;
  right: 18px;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 22px;
  color: var(--ink-3);
  cursor: pointer;
  transition: background .2s, color .2s;
  line-height: 1;
}

.modal-close:hover { background: var(--bg-alt); color: var(--ink); }

.loading-spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, .4);
  border-top-color: #FFFEFB;
  border-radius: 50%;
  animation: spin .7s linear infinite;
  vertical-align: -2px;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ===== 通知 ===== */
.notification {
  position: fixed;
  top: 88px;
  right: 24px;
  z-index: 3000;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  padding: 14px 20px;
  font-size: 14.5px;
  font-weight: 500;
  transform: translateX(120%);
  transition: transform .35s var(--ease);
}

.notification.show { transform: translateX(0); }
.notification-success { border-left: 4px solid #22C55E; }
.notification-error { border-left: 4px solid #EF4444; }
.notification-icon { font-weight: 700; }
.notification-success .notification-icon { color: #22C55E; }
.notification-error .notification-icon { color: #EF4444; }

/* ===== 滚动出现动画 ===== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s var(--ease);
  transition-delay: var(--d, 0ms);
  will-change: opacity, transform;
}

.reveal.in { opacity: 1; transform: none; }

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

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .hero-title { font-size: 44px; }
  .hero-inner { gap: 44px; }
  .grid-3, .case-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .value-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .detail-grid { grid-template-columns: 1fr; }
  .detail-grid .detail-card.featured { grid-column: span 1; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .section-head { margin-bottom: 40px; }
  .section-head h2 { font-size: 28px; }

  .nav-menu, .nav-right .btn { display: none; }
  .nav-toggle { display: flex; }

  .hero { padding: calc(var(--nav-h) + 48px) 0 64px; }
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-title { font-size: 34px; }
  .hero-sub { font-size: 16px; }
  .hero-stats { gap: 28px; flex-wrap: wrap; }
  .float-card { display: none; }

  .grid-3, .case-grid, .steps, .value-grid { grid-template-columns: 1fr; }
  .about-grid, .contact-layout { grid-template-columns: 1fr; gap: 36px; }

  .cta-banner { padding: 48px 24px; }
  .cta-banner h2 { font-size: 26px; }
  .cta-banner .cta-actions { flex-direction: column; align-items: stretch; }

  .page-title { font-size: 30px; }
  .page-hero { padding: calc(var(--nav-h) + 48px) 0 48px; }

  .detail-card { padding: 28px 22px; }
  .prose-wrap { padding: 28px 22px; }
  .form-card { padding: 28px 22px; }
  .specs { flex-direction: column; }
  .specs .spec + .spec { border-left: none; border-top: 1px solid var(--line); }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .compare-wrap { overflow-x: auto; }
  .compare-table { min-width: 560px; }
}