/* ============================================================
   里德科技官网 · 样式表
   设计语言：现代极简 B2B / 编号版块 / 英文眉题 / 衬线斜体强调
   ============================================================ */

:root {
  --blue: #1D6FF2;
  --blue-dark: #0F56C9;
  --ink: #0D1526;
  --ink-2: #33415C;
  --muted: #64748B;
  --line: #E4E9F2;
  --bg: #FFFFFF;
  --bg-soft: #F5F7FB;
  --bg-dark: #0B1120;
  --radius: 14px;
  --shadow-sm: 0 1px 2px rgba(13, 21, 38, .05);
  --shadow-md: 0 8px 30px rgba(13, 21, 38, .08);
  --shadow-lg: 0 20px 60px rgba(13, 21, 38, .12);
  --font-sans: "Inter", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Noto Serif SC", "Songti SC", Georgia, serif;
  --header-h: 68px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.container {
  width: min(1160px, 100% - 48px);
  margin-inline: auto;
}

/* ---------- 通用元素 ---------- */

.eyebrow {
  font-size: 12px;
  letter-spacing: .22em;
  font-weight: 600;
  color: var(--blue);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.eyebrow-light { color: #8FB8FF; }

.section { padding: 96px 0; }
.section-soft { background: var(--bg-soft); }
.section-dark { background: var(--bg-dark); color: #E8EDF7; }
.section-dark .section-title { color: #fff; }

.section-title {
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 700;
  letter-spacing: -.01em;
  line-height: 1.25;
  margin-bottom: 18px;
}

.section-lead {
  color: var(--muted);
  max-width: 640px;
  font-size: 16.5px;
  margin-bottom: 42px;
}
.section-dark .section-lead, .section-cta .section-lead { color: #9FB0CC; }

em {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--blue);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease, color .18s ease;
}
.btn-primary {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 6px 20px rgba(29, 111, 242, .35);
}
.btn-primary:hover { background: var(--blue-dark); transform: translateY(-2px); }
.btn-ghost {
  border-color: var(--line);
  color: var(--ink);
  background: #fff;
}
.btn-ghost:hover { border-color: var(--blue); color: var(--blue); transform: translateY(-2px); }
.btn-block { width: 100%; }

.check-list { list-style: none; }
.check-list li {
  position: relative;
  padding-left: 26px;
  margin-bottom: 10px;
  color: var(--ink-2);
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 9px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--blue);
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='white' d='M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4z'/%3E%3C/svg%3E") center/contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='white' d='M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4z'/%3E%3C/svg%3E") center/contain no-repeat;
}
.check-list-light li { color: #C6D2E8; }

/* ---------- 顶部导航 ---------- */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-h);
  z-index: 100;
  background: rgba(255, 255, 255, .82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s ease, box-shadow .25s ease;
}
.site-header.scrolled {
  border-bottom-color: var(--line);
  box-shadow: var(--shadow-sm);
}

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
}
.brand-mark { display: inline-flex; }
.brand-name { font-weight: 700; font-size: 17px; letter-spacing: .02em; }

.main-nav { display: flex; align-items: center; gap: 30px; }
.main-nav a {
  position: relative;
  text-decoration: none;
  color: var(--ink-2);
  font-size: 14.5px;
  font-weight: 500;
  transition: color .18s ease;
}
.main-nav a:hover { color: var(--blue); }
.main-nav a.active { color: var(--blue); }
.main-nav a.active::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 2px;
  border-radius: 2px;
  background: var(--blue);
}
.main-nav .nav-cta {
  padding: 9px 20px;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
}
.main-nav .nav-cta:hover { background: var(--blue); color: #fff; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  width: 22px; height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform .25s ease, opacity .25s ease;
}

/* ---------- Hero ---------- */

.hero {
  padding: calc(var(--header-h) + 72px) 0 88px;
  background:
    radial-gradient(720px 420px at 88% -8%, rgba(29, 111, 242, .12), transparent 60%),
    radial-gradient(560px 380px at -10% 30%, rgba(29, 111, 242, .07), transparent 55%),
    var(--bg);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 56px;
  align-items: center;
}

.hero-title {
  font-size: clamp(34px, 5vw, 58px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -.015em;
  margin-bottom: 22px;
}

.hero-sub {
  color: var(--muted);
  font-size: 17px;
  max-width: 520px;
  margin-bottom: 32px;
}

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 44px; }

.hero-points {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  border-top: 1px solid var(--line);
  padding-top: 26px;
}
.hero-points strong { display: block; font-size: 14.5px; margin-bottom: 4px; }
.hero-points span { font-size: 13px; color: var(--muted); line-height: 1.5; display: block; }

/* Hero 装饰视觉 */
.hero-visual {
  position: relative;
  height: 420px;
  display: grid;
  place-items: center;
}
.hero-core {
  position: relative;
  width: 190px; height: 190px;
  display: grid;
  place-items: center;
}
.core-ring {
  position: absolute; inset: 0;
  border-radius: 50%;
  border: 1.5px dashed rgba(29, 111, 242, .45);
  animation: spin 26s linear infinite;
}
.core-ring::after {
  content: "";
  position: absolute; inset: 26px;
  border-radius: 50%;
  border: 1px solid rgba(29, 111, 242, .25);
}
.core-dot {
  position: absolute;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--blue);
  top: -7px; left: calc(50% - 7px);
  box-shadow: 0 0 0 6px rgba(29, 111, 242, .15);
}
.hero-core p {
  font-size: 12px;
  letter-spacing: .28em;
  font-weight: 700;
  color: var(--blue);
  text-align: center;
  line-height: 1.9;
}
@keyframes spin { to { transform: rotate(360deg); } }

.orbit-card {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 16px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink-2);
  box-shadow: var(--shadow-md);
  animation: floaty 5.5s ease-in-out infinite;
}
.orbit-card i {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--blue);
}
.oc-1 { top: 12%; left: 4%; animation-delay: 0s; }
.oc-2 { top: 38%; right: 0%; animation-delay: 1.6s; }
.oc-3 { bottom: 10%; left: 12%; animation-delay: 3s; }
@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* ---------- 三层路径 ---------- */

.path-flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 18px;
  align-items: stretch;
}
.path-layer {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 26px;
  box-shadow: var(--shadow-sm);
  transition: transform .2s ease, box-shadow .2s ease;
}
.path-layer:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.path-layer-mid {
  background: var(--ink);
  border-color: var(--ink);
  color: #E8EDF7;
}
.path-layer-mid h3 { color: #fff; }
.path-layer-mid li { color: #A9B8D4; }
.path-tag {
  display: inline-block;
  font-size: 11.5px;
  letter-spacing: .18em;
  font-weight: 700;
  color: var(--blue);
  margin-bottom: 10px;
}
.path-layer h3 { font-size: 19px; margin-bottom: 12px; }
.path-layer ul { list-style: none; }
.path-layer li {
  font-size: 14px;
  color: var(--ink-2);
  padding: 6px 0 6px 16px;
  position: relative;
}
.path-layer li::before {
  content: "";
  position: absolute;
  left: 0; top: 15px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--blue);
}
.path-arrow {
  align-self: center;
  font-size: 22px;
  color: var(--blue);
  font-weight: 700;
}

/* ---------- 四阶段卡片 ---------- */

.stage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.stage-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 24px 26px;
  overflow: hidden;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.stage-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(29, 111, 242, .4);
}
.stage-no {
  position: absolute;
  top: 14px; right: 18px;
  font-size: 44px;
  font-weight: 800;
  color: rgba(29, 111, 242, .1);
  line-height: 1;
}
.stage-card h3 {
  font-size: 20px;
  letter-spacing: .04em;
  margin-bottom: 4px;
  color: var(--blue);
}
.stage-card h3 small {
  display: block;
  font-size: 15px;
  color: var(--ink);
  letter-spacing: 0;
  margin-top: 2px;
}
.stage-out {
  font-size: 12.5px;
  color: var(--muted);
  border-bottom: 1px dashed var(--line);
  padding: 10px 0;
  margin-bottom: 12px;
}
.stage-card ul { list-style: none; }
.stage-card li {
  font-size: 13.5px;
  color: var(--ink-2);
  padding: 5px 0 5px 16px;
  position: relative;
}
.stage-card li::before {
  content: "";
  position: absolute;
  left: 0; top: 13px;
  width: 6px; height: 6px;
  border-radius: 2px;
  background: var(--blue);
}

/* ---------- 左右分栏 ---------- */

.split {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 64px;
  align-items: start;
}
.split-left { position: sticky; top: calc(var(--header-h) + 32px); }

/* ---------- 六步列表 ---------- */

.step-list { list-style: none; counter-reset: step; }
.step-list li {
  display: flex;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}
.step-list li:last-child { border-bottom: 0; }
.step-list span {
  flex: 0 0 auto;
  width: 42px; height: 42px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: #fff;
  border: 1px solid var(--line);
  color: var(--blue);
  font-weight: 700;
  font-size: 14px;
  box-shadow: var(--shadow-sm);
}
.step-list h4 { font-size: 16.5px; margin-bottom: 3px; }
.step-list p { font-size: 14px; color: var(--muted); }

/* ---------- 联合团队图 ---------- */

.team-map {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  max-width: 860px;
  margin-top: 10px;
}
.team-node {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 26px;
  box-shadow: var(--shadow-sm);
}
.team-node h4 { font-size: 16px; margin-bottom: 4px; }
.team-node p { font-size: 13.5px; color: var(--muted); }
.tn-core {
  grid-column: 1 / -1;
  background: var(--blue);
  border-color: var(--blue);
  text-align: center;
  padding: 30px 26px;
}
.tn-core h4 { color: #fff; font-size: 18px; }
.tn-core p { color: #CFE0FF; }

/* ---------- 对比卡片 ---------- */

.compare-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 8px;
}
.compare-card {
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: var(--radius);
  padding: 26px 22px;
  transition: border-color .2s ease, transform .2s ease;
}
.compare-card:hover { border-color: rgba(143, 184, 255, .5); transform: translateY(-4px); }
.compare-card h4 { font-size: 16px; color: #fff; margin-bottom: 14px; }
.cc-them {
  font-size: 13.5px;
  color: #8A99B8;
  padding-bottom: 12px;
  border-bottom: 1px dashed rgba(255, 255, 255, .14);
  margin-bottom: 12px;
}
.cc-us { font-size: 14px; color: #BFD3FF; font-weight: 600; }
.cc-us::before { content: "✦ "; color: var(--blue); }

/* ---------- 成功信号 ---------- */

.signal-list { list-style: none; }
.signal-list li {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 18px;
  align-items: baseline;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.signal-list li:last-child { border-bottom: 0; }
.signal-list h4 { font-size: 16.5px; color: var(--blue); }
.signal-list p { font-size: 14.5px; color: var(--ink-2); }

/* ---------- Tabs 业务场景 ---------- */

.tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}
.tab-btn {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink-2);
  border-radius: 999px;
  padding: 10px 22px;
  font-size: 14.5px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all .18s ease;
}
.tab-btn:hover { border-color: var(--blue); color: var(--blue); }
.tab-btn.active {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}

.tab-panels {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 40px;
  box-shadow: var(--shadow-md);
}
.tab-panel { display: none; }
.tab-panel.active {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 44px;
  align-items: center;
  animation: fadeUp .4s ease;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}
.panel-copy h3 { font-size: 24px; margin-bottom: 12px; }
.panel-copy > p { color: var(--muted); font-size: 15px; margin-bottom: 20px; }

.panel-stat { display: grid; gap: 16px; }
.stat-card {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 26px;
}
.stat-card strong {
  display: block;
  font-size: 34px;
  font-weight: 800;
  color: var(--blue);
  letter-spacing: -.02em;
}
.stat-card span { font-size: 13.5px; color: var(--muted); }

/* 流程小图 */
.flow-mini {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.fm-node {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-2);
}
.fm-ai { background: rgba(29, 111, 242, .1); border-color: rgba(29, 111, 242, .4); color: var(--blue); }
.fm-done { background: var(--ink); border-color: var(--ink); color: #fff; }
.fm-arrow { color: var(--blue); font-weight: 700; }

/* AI 工作台模拟界面 */
.workbench {
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: #fff;
}
.wb-head {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--line);
  padding: 11px 14px;
}
.wb-dot { width: 10px; height: 10px; border-radius: 50%; background: #D5DCE8; }
.wb-dot:first-child { background: #FF5F57; }
.wb-dot:nth-child(2) { background: #FEBC2E; }
.wb-dot:nth-child(3) { background: #28C840; }
.wb-head em {
  margin-left: auto;
  font-size: 12px;
  color: var(--muted);
  font-family: var(--font-sans);
  font-style: normal;
}
.wb-body {
  display: grid;
  grid-template-columns: 150px 1fr;
  min-height: 280px;
}
.wb-side {
  border-right: 1px solid var(--line);
  background: #FBFCFE;
  padding: 16px 12px;
}
.wb-side-title {
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
  font-weight: 700;
  margin-bottom: 12px;
}
.wb-src {
  font-size: 12.5px;
  color: var(--ink-2);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 6px;
  border-radius: 8px;
  margin-bottom: 4px;
}
.wb-src i { width: 7px; height: 7px; border-radius: 50%; }
.wb-src.ok i { background: #28C840; }
.wb-src.sync i { background: #FEBC2E; }
.wb-src span {
  margin-left: auto;
  font-size: 10.5px;
  font-weight: 500;
  color: var(--muted);
}
.wb-chat { padding: 18px; display: flex; flex-direction: column; gap: 12px; }
.wb-msg {
  font-size: 13px;
  line-height: 1.65;
  padding: 11px 14px;
  border-radius: 12px;
  max-width: 92%;
}
.wb-msg.user {
  align-self: flex-end;
  background: var(--blue);
  color: #fff;
  border-bottom-right-radius: 4px;
}
.wb-msg.ai {
  align-self: flex-start;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  color: var(--ink-2);
  border-bottom-left-radius: 4px;
}
.wb-cite {
  display: block;
  margin-top: 6px;
  font-size: 11px;
  color: var(--blue);
  font-weight: 600;
}
.wb-input {
  margin-top: auto;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 10px 16px;
  font-size: 12.5px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.wb-input span { color: var(--blue); }

/* ---------- 生态分层 ---------- */

.eco-stack { display: grid; gap: 14px; }
.eco-layer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 30px;
  transition: transform .2s ease, box-shadow .2s ease;
}
.eco-layer:hover { transform: translateX(6px); box-shadow: var(--shadow-md); }
.eco-layer-hl {
  background: var(--ink);
  border-color: var(--ink);
}
.eco-layer-hl h3 { color: #fff; }
.eco-layer-hl p { color: #A9B8D4; }
.eco-tag {
  display: inline-block;
  font-size: 11.5px;
  letter-spacing: .16em;
  font-weight: 700;
  color: var(--blue);
  margin-bottom: 6px;
}
.eco-main h3 { font-size: 18.5px; margin-bottom: 4px; }
.eco-main p { font-size: 14px; color: var(--muted); max-width: 560px; }
.eco-link {
  flex: 0 0 auto;
  font-size: 14px;
  font-weight: 600;
  color: var(--blue);
  text-decoration: none;
  white-space: nowrap;
}
.eco-link:hover { text-decoration: underline; }

/* ---------- Before / After ---------- */

.ba-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 20px;
  align-items: stretch;
  margin-bottom: 34px;
}
.ba-card {
  border-radius: var(--radius);
  padding: 30px 28px;
  border: 1px solid var(--line);
  background: #fff;
}
.ba-card h4 { font-size: 18px; margin: 10px 0 14px; }
.ba-card ul { list-style: none; }
.ba-card li {
  font-size: 14px;
  color: var(--ink-2);
  padding: 6px 0 6px 18px;
  position: relative;
}
.ba-card li::before {
  content: "";
  position: absolute;
  left: 0; top: 14px;
  width: 7px; height: 7px;
  border-radius: 50%;
}
.ba-before li::before { background: #C3CDDD; }
.ba-after {
  background: var(--ink);
  border-color: var(--ink);
}
.ba-after h4 { color: #fff; }
.ba-after li { color: #C6D2E8; }
.ba-after li::before { background: var(--blue); }
.ba-after .ba-tag { background: var(--blue); color: #fff; }
.ba-tag {
  display: inline-block;
  font-size: 11px;
  letter-spacing: .2em;
  font-weight: 700;
  color: var(--muted);
  background: var(--bg-soft);
  border: 1px solid var(--line);
  padding: 4px 12px;
  border-radius: 999px;
}
.ba-arrow {
  align-self: center;
  font-size: 26px;
  color: var(--blue);
  font-weight: 800;
}

.method-steps {
  display: flex;
  align-items: center;
  gap: 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 26px;
  flex-wrap: wrap;
}
.ms-item { display: flex; align-items: center; gap: 12px; }
.ms-item span {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--blue);
  white-space: nowrap;
}
.ms-item p { font-size: 14px; color: var(--ink-2); }
.ms-arrow { color: var(--blue); font-weight: 700; }

/* ---------- 关于我们 ---------- */

.quote {
  font-family: var(--font-serif);
  font-size: 19px;
  font-style: italic;
  color: var(--ink-2);
  border-left: 3px solid var(--blue);
  padding-left: 20px;
  margin: 26px 0 20px;
  line-height: 1.8;
}
.about-text { color: var(--muted); font-size: 15.5px; max-width: 480px; }

.cap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.cap-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 24px;
  transition: transform .2s ease, box-shadow .2s ease;
}
.cap-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.cap-card h4 { font-size: 16.5px; margin-bottom: 6px; }
.cap-card h4::before { content: "✦ "; color: var(--blue); }
.cap-card p { font-size: 14px; color: var(--muted); }

/* ---------- 转化版块 ---------- */

.section-cta {
  background:
    radial-gradient(700px 400px at 85% 0%, rgba(29, 111, 242, .25), transparent 60%),
    var(--bg-dark);
  color: #E8EDF7;
}
.section-cta .section-title { color: #fff; }

.cta-grid {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 56px;
  align-items: start;
}
.cta-info h3 { font-size: 20px; color: #fff; margin-bottom: 18px; }

.qr-box {
  margin-top: 30px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.qr-img {
  width: 108px; height: 108px;
  border-radius: 12px;
  background: #fff;
  padding: 6px;
  box-sizing: border-box;
  display: block;
  object-fit: contain; /* 原图非正方形时等比缩放，避免拉伸变形影响扫码 */
}
.qr-box p { font-size: 13px; color: #8A99B8; max-width: 200px; }

.cta-form {
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 18px;
  padding: 34px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.cta-form label {
  display: block;
  font-size: 13.5px;
  font-weight: 600;
  color: #C6D2E8;
  margin-bottom: 16px;
}
.cta-form input[type="text"],
.cta-form textarea {
  width: 100%;
  margin-top: 7px;
  background: rgba(255, 255, 255, .07);
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 14.5px;
  font-family: inherit;
  color: #fff;
  outline: none;
  transition: border-color .18s ease, background .18s ease;
  resize: vertical;
}
.cta-form input::placeholder, .cta-form textarea::placeholder { color: #6E7E9E; }
.cta-form input:focus, .cta-form textarea:focus {
  border-color: var(--blue);
  background: rgba(29, 111, 242, .08);
}
.cta-form input.invalid, .cta-form textarea.invalid { border-color: #FF5F57; }

.stage-radio {
  border: 0;
  margin-bottom: 22px;
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}
.stage-radio legend {
  font-size: 13.5px;
  font-weight: 600;
  color: #C6D2E8;
  margin-bottom: 8px;
  float: left;
  width: 100%;
}
.stage-radio label {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 14px;
  color: #C6D2E8;
  margin-bottom: 0;
  cursor: pointer;
}
.stage-radio input { accent-color: var(--blue); }

.form-note {
  margin-top: 14px;
  font-size: 12.5px;
  color: #6E7E9E;
  text-align: center;
}
.form-note.success { color: #28C840; font-weight: 600; }

/* ---------- 页脚 ---------- */

.site-footer {
  background: #070B14;
  color: #8A99B8;
  padding: 44px 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
  flex-wrap: wrap;
}
.footer-brand .brand-name { color: #fff; font-size: 16px; }
.footer-brand p { font-size: 13px; margin-top: 6px; }
.footer-links { display: flex; gap: 22px; flex-wrap: wrap; }
.footer-links a {
  color: #8A99B8;
  text-decoration: none;
  font-size: 13.5px;
  transition: color .18s ease;
}
.footer-links a:hover { color: #fff; }
.footer-contact { text-align: right; font-size: 13.5px; }
.footer-contact a {
  color: #8A99B8;
  text-decoration: none;
  transition: color .18s ease;
}
.footer-contact a:hover { color: #fff; }
.footer-icp { font-size: 12px; color: #55648A; margin-top: 6px; }

/* ---------- 滚动显现动画 ---------- */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .core-ring, .orbit-card { animation: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 响应式 ---------- */

@media (max-width: 1080px) {
  .stage-grid, .compare-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-grid { grid-template-columns: 1fr; gap: 30px; }
  .hero-visual { display: none; }
  .split { grid-template-columns: 1fr; gap: 36px; }
  .split-left { position: static; }
  .tab-panel.active { grid-template-columns: 1fr; gap: 28px; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }

  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 24px 20px;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-md);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s ease, transform .2s ease;
  }
  .main-nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .main-nav a { padding: 13px 4px; border-bottom: 1px solid var(--line); }
  .main-nav a.active::after { display: none; }
  .main-nav .nav-cta {
    margin-top: 12px;
    text-align: center;
    border-bottom: 0;
  }
  .nav-toggle { display: flex; }
  .nav-toggle.open span:first-child { transform: translateY(7px) rotate(45deg); }
  .nav-toggle.open span:nth-child(2) { opacity: 0; }
  .nav-toggle.open span:last-child { transform: translateY(-7px) rotate(-45deg); }

  .hero { padding-top: calc(var(--header-h) + 48px); }
  .hero-points { grid-template-columns: 1fr; gap: 12px; }

  .path-flow { grid-template-columns: 1fr; }
  .path-arrow { transform: rotate(90deg); justify-self: center; }

  .stage-grid, .compare-grid, .cap-grid, .team-map { grid-template-columns: 1fr; }
  .signal-list li { grid-template-columns: 1fr; gap: 4px; }

  .tab-panels { padding: 26px 20px; }
  .wb-body { grid-template-columns: 1fr; }
  .wb-side { display: none; }

  .ba-grid { grid-template-columns: 1fr; }
  .ba-arrow { transform: rotate(90deg); justify-self: center; }
  .method-steps { flex-direction: column; align-items: flex-start; }
  .ms-arrow { transform: rotate(90deg); }

  .cta-grid { grid-template-columns: 1fr; gap: 36px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-contact { text-align: left; }
}