/* ============================================================
   睿唐融创 GEO 增长引擎 — Apple 系设计系统
   主色 #6C5CE7 / 深灰 #1D1D1F / 浅灰 #F5F5F7
   ============================================================ */

:root {
  --accent: #6C5CE7;
  --accent-dark: #5A4BD1;
  --ink: #1D1D1F;
  --gray: #F5F5F7;
  --gray-text: #86868B;
  --line: #E3E3E8;
  --radius: 18px;
  --radius-lg: 28px;
  --font: -apple-system, "SF Pro Display", "PingFang SC", "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-card: 0 2px 12px rgba(0,0,0,0.04);
  --shadow-card-hover: 0 14px 40px rgba(0,0,0,0.10);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--ink);
  background: #fff;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; }

.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ---------- 通用区块 ---------- */
.section { padding: 96px 0; }
.section-white { background: #fff; }
.section-gray { background: var(--gray); }

.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-kicker {
  font-size: 14px; font-weight: 600; letter-spacing: .12em;
  color: var(--accent); text-transform: uppercase; margin-bottom: 12px;
}
.section-title {
  font-size: clamp(30px, 4.4vw, 48px);
  font-weight: 700; letter-spacing: -0.02em; line-height: 1.15;
}
.section-sub {
  margin-top: 16px; font-size: clamp(15px, 1.6vw, 19px);
  color: var(--gray-text); line-height: 1.6;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 500; border-radius: 980px;
  padding: 13px 26px; border: none;
  transition: box-shadow .3s var(--ease), transform .3s var(--ease), background .3s;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); box-shadow: 0 8px 24px rgba(108,92,231,.35); transform: translateY(-2px); }
.btn-link { color: var(--accent); padding: 13px 4px; background: none; }
.btn-link .arrow { margin-left: 6px; transition: transform .3s var(--ease); display: inline-block; }
.btn-link:hover .arrow { transform: translateX(4px); }
.btn-white { background: #fff; color: var(--accent); font-weight: 600; }
.btn-white:hover { box-shadow: 0 8px 24px rgba(0,0,0,.18); transform: translateY(-2px); }
.btn-sm { padding: 10px 20px; font-size: 14px; }
.btn-block { width: 100%; }

/* ---------- 导航 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, background .3s;
}
.nav.scrolled { border-bottom-color: var(--line); }
.nav-inner {
  max-width: 1120px; margin: 0 auto; padding: 0 24px;
  height: 56px; display: flex; align-items: center; justify-content: space-between;
}
.nav-logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;letter-spacing:-.01em;flex-shrink:0;text-decoration:none;color:inherit}
.nav-logo svg{display:block}
.nav-logo small{font-weight:500;color:#6C757D;font-size:11px;letter-spacing:.02em;margin-left:2px}
.nav-links { display: flex; align-items: center; gap: 34px; }
.nav-links a { font-size: 13.5px; color: #3a3a3c; transition: color .2s; }
.nav-links a:hover { color: var(--accent); }
.nav-cta {
  background: var(--accent); color: #fff !important;
  padding: 6px 16px; border-radius: 980px; font-weight: 500;
}
.nav-cta:hover { background: var(--accent-dark); }
.nav-burger { display: none; background: none; border: none; width: 32px; height: 32px; position: relative; }
.nav-burger span {
  position: absolute; left: 6px; right: 6px; height: 1.6px; background: var(--ink);
  transition: transform .3s var(--ease), top .3s var(--ease);
}
.nav-burger span:first-child { top: 12px; }
.nav-burger span:last-child { top: 19px; }
.nav-burger.open span:first-child { top: 15.5px; transform: rotate(45deg); }
.nav-burger.open span:last-child { top: 15.5px; transform: rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(180deg, #F5F5F7 0%, #F2F3F8 55%, #EDEFF7 100%);
  padding: 148px 0 96px;
  overflow: hidden;
}
.hero-inner {
  max-width: 1120px; margin: 0 auto; padding: 0 24px;
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center;
}
.hero-kicker {
  display: inline-block; font-size: 14px; font-weight: 600; letter-spacing: .1em;
  color: var(--accent); background: rgba(108,92,231,.09);
  padding: 6px 14px; border-radius: 980px; margin-bottom: 22px;
}
.hero-title {
  font-size: clamp(40px, 5.6vw, 64px);
  font-weight: 800; letter-spacing: -0.025em; line-height: 1.08;
}
.hero-sub {
  margin-top: 20px; font-size: clamp(16px, 1.8vw, 19px);
  color: #4b4b50; line-height: 1.65; max-width: 30em;
}
.hero-ctas { margin-top: 34px; display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }

/* Hero 视觉：AI 面板 */
.hero-visual { position: relative; }
.ai-panel {
  background: #fff; border-radius: var(--radius-lg);
  box-shadow: 0 24px 70px rgba(29,29,31,.12), 0 2px 8px rgba(29,29,31,.05);
  padding: 0 0 18px; overflow: hidden;
  border: 1px solid rgba(255,255,255,.6);
}
.ai-panel-bar {
  display: flex; align-items: center; gap: 6px;
  padding: 14px 18px; border-bottom: 1px solid #F0F0F4;
}
.ai-panel-bar .dot { width: 10px; height: 10px; border-radius: 50%; background: #E5E5EA; }
.ai-panel-bar .dot:first-child { background: #FF5F57; }
.ai-panel-bar .dot:nth-child(2) { background: #FEBC2E; }
.ai-panel-bar .dot:nth-child(3) { background: #28C840; }
.ai-panel-title { margin-left: auto; font-size: 12px; color: var(--gray-text); font-weight: 500; }
.ai-msg { padding: 14px 18px 0; display: flex; gap: 10px; }
.ai-msg-user p {
  margin-left: auto; background: var(--accent); color: #fff;
  font-size: 13.5px; line-height: 1.55; padding: 10px 14px;
  border-radius: 16px 16px 4px 16px; max-width: 78%;
}
.ai-avatar {
  flex: 0 0 28px; width: 28px; height: 28px; border-radius: 50%;
  background: rgba(108,92,231,.1); display: grid; place-items: center;
}
.ai-msg-body {
  background: #F5F5F7; border-radius: 4px 16px 16px 16px;
  padding: 12px 14px; font-size: 13.5px; line-height: 1.6; max-width: 84%;
}
.ai-msg-body strong { color: var(--accent); }
.ai-card {
  margin-top: 10px; background: #fff; border: 1px solid var(--line);
  border-radius: 14px; padding: 12px;
}
.ai-card-head { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.ai-card-logo {
  width: 34px; height: 34px; border-radius: 9px; background: var(--accent);
  color: #fff; font-weight: 800; display: grid; place-items: center; font-size: 16px;
}
.ai-card-name { font-weight: 700; font-size: 13.5px; }
.ai-card-tag { font-size: 11px; color: var(--accent); font-weight: 500; }
.ai-bar-row { display: flex; align-items: center; gap: 8px; font-size: 11px; color: var(--gray-text); margin-top: 6px; }
.ai-bar-row span { flex: 0 0 60px; }
.ai-bar-row b { flex: 0 0 20px; text-align: right; color: var(--ink); font-weight: 600; }
.ai-bar { flex: 1; height: 5px; background: #EFEFF3; border-radius: 3px; overflow: hidden; }
.ai-bar i { display: block; height: 100%; background: linear-gradient(90deg, #A79BFF, var(--accent)); border-radius: 3px; }
.ai-typing { display: flex; gap: 5px; padding: 16px 18px 0 56px; }
.ai-typing span {
  width: 7px; height: 7px; border-radius: 50%; background: #C7C7CC;
  animation: typing 1.2s infinite ease-in-out;
}
.ai-typing span:nth-child(2) { animation-delay: .15s; }
.ai-typing span:nth-child(3) { animation-delay: .3s; }
@keyframes typing { 0%,60%,100% { opacity: .35; transform: translateY(0); } 30% { opacity: 1; transform: translateY(-3px); } }

.hero-badge {
  position: absolute; background: rgba(255,255,255,.9);
  backdrop-filter: blur(12px); border: 1px solid rgba(255,255,255,.7);
  box-shadow: 0 10px 30px rgba(29,29,31,.12);
  border-radius: 14px; padding: 10px 16px;
  font-size: 13px; font-weight: 500; color: #3a3a3c;
}
.hero-badge b { color: var(--accent); font-weight: 700; }
.hero-badge-1 { top: -18px; right: 8%; animation: float 5s ease-in-out infinite; }
.hero-badge-2 { bottom: -14px; left: 4%; animation: float 6s ease-in-out infinite reverse; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }

/* ---------- 价值 4 宫格 ---------- */
.value-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.value-card {
  background: var(--gray); border-radius: var(--radius-lg); padding: 34px 26px;
  transition: box-shadow .35s var(--ease), transform .35s var(--ease);
}
.value-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }
.value-icon {
  width: 56px; height: 56px; border-radius: 16px; background: #fff;
  display: grid; place-items: center; margin-bottom: 20px;
  box-shadow: var(--shadow-card);
}
.value-card h3 { font-size: 20px; font-weight: 700; letter-spacing: -0.01em; margin-bottom: 10px; }
.value-card p { font-size: 14.5px; color: var(--gray-text); line-height: 1.65; }

/* ---------- 数据锚点条 ---------- */
.stat-bar {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 24px;
  text-align: center;
}
.stat-num {
  font-size: clamp(44px, 5vw, 56px); font-weight: 700; letter-spacing: -0.03em;
  color: var(--ink); line-height: 1;
}
.stat-num span { font-size: .55em; font-weight: 700; color: var(--accent); margin-left: 2px; }
.stat-label { margin-top: 10px; font-size: 14px; color: var(--gray-text); }

/* ---------- 4 大能力交替图文 ---------- */
.feature {
  display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center;
  padding: 72px 24px;
}
.feature-reverse .feature-copy { order: 2; }
.feature-reverse .feature-visual { order: 1; }
.feature + .feature { border-top: 1px solid var(--line); }
.feature-index {
  font-size: 14px; font-weight: 600; letter-spacing: .1em; color: var(--accent);
  margin-bottom: 14px;
}
.feature-title {
  font-size: clamp(28px, 3.4vw, 40px); font-weight: 700;
  letter-spacing: -0.02em; line-height: 1.18;
}
.feature-anchor {
  margin-top: 16px; font-size: 15px; font-weight: 600; color: var(--ink);
  display: inline-block; background: var(--gray); border-radius: 980px; padding: 8px 16px;
}
.feature-list { margin: 24px 0 10px; }
.feature-list li {
  position: relative; padding-left: 26px; margin-bottom: 14px;
  font-size: 15.5px; color: #4b4b50; line-height: 1.65;
}
.feature-list li::before {
  content: ""; position: absolute; left: 0; top: 7px;
  width: 16px; height: 16px; border-radius: 50%;
  background: rgba(108,92,231,.12);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath d='M5 8.5l2 2 4-4.5' fill='none' stroke='%236C5CE7' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
}

/* Mock 视觉卡 */
.feature-visual { display: flex; justify-content: center; }
.mock {
  width: 100%; max-width: 460px; background: var(--gray);
  border-radius: var(--radius-lg); padding: 22px;
  transition: box-shadow .35s var(--ease), transform .35s var(--ease);
}
.mock:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }
.mock-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.mock-title { font-size: 13px; font-weight: 600; color: var(--gray-text); }
.mock-live { font-size: 11px; font-weight: 600; color: #E5484D; }
.mock-chip {
  font-size: 11.5px; font-weight: 600; color: var(--accent);
  background: rgba(108,92,231,.1); padding: 4px 10px; border-radius: 980px;
}
.mock-chart {
  background: #fff; border-radius: 16px; padding: 16px 12px 6px;
  box-shadow: var(--shadow-card);
}
.mock-chart svg { width: 100%; height: 120px; display: block; }
.mock-metrics {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 14px;
}
.mock-metrics > div {
  background: #fff; border-radius: 14px; padding: 14px 10px; text-align: center;
  box-shadow: var(--shadow-card);
}
.mock-metrics b { display: block; font-size: 22px; font-weight: 700; letter-spacing: -0.02em; }
.mock-metrics b i { font-style: normal; font-size: .6em; color: var(--accent); }
.mock-metrics span { font-size: 11.5px; color: var(--gray-text); }

/* 信源 mock */
.mock-source { text-align: center; }
.source-center { margin: 6px 0 18px; }
.source-center svg { margin: 0 auto 6px; }
.source-center p { font-size: 13px; font-weight: 600; }
.source-list { display: grid; gap: 10px; }
.source-row {
  display: flex; align-items: center; gap: 10px;
  background: #fff; border-radius: 12px; padding: 12px 16px;
  font-size: 13.5px; box-shadow: var(--shadow-card); text-align: left;
}
.source-row b { margin-left: auto; font-weight: 700; }
.source-dot { width: 9px; height: 9px; border-radius: 50%; flex: 0 0 9px; }

/* 创作 mock */
.doc-line { height: 10px; border-radius: 5px; background: #E7E7EC; margin-bottom: 10px; }
.doc-line:first-of-type { background: #D9D5F5; height: 13px; }
.doc-tags { display: flex; gap: 8px; flex-wrap: wrap; margin: 14px 0; }
.doc-tags span {
  font-size: 11px; font-weight: 600; color: var(--accent);
  background: rgba(108,92,231,.08); padding: 5px 10px; border-radius: 980px;
}
.doc-tpl { display: grid; grid-template-columns: repeat(6, 1fr); gap: 8px; margin-top: 16px; }
.doc-tpl span {
  background: #fff; border: 1px solid var(--line); border-radius: 10px;
  text-align: center; font-size: 12px; padding: 9px 0; font-weight: 500;
  transition: border-color .25s, color .25s;
}
.doc-tpl span:hover { border-color: var(--accent); color: var(--accent); }

/* 分发 mock */
.dist-hub {
  position: relative; height: 190px; background: #fff; border-radius: 16px;
  box-shadow: var(--shadow-card); margin-bottom: 14px;
}
.dist-core {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
  width: 62px; height: 62px; border-radius: 50%; background: var(--accent);
  color: #fff; font-size: 13px; font-weight: 700; display: grid; place-items: center;
  box-shadow: 0 8px 22px rgba(108,92,231,.4);
}
.dist-node {
  position: absolute; font-size: 12px; font-weight: 500; color: #3a3a3c;
  background: var(--gray); border-radius: 980px; padding: 7px 14px;
  animation: float 5s ease-in-out infinite;
}
.dist-node.n1 { top: 16px; left: 12%; }
.dist-node.n2 { top: 16px; right: 12%; animation-delay: .6s; }
.dist-node.n3 { top: 45%; left: 5%; animation-delay: 1.1s; }
.dist-node.n4 { top: 45%; right: 5%; animation-delay: 1.6s; }
.dist-node.n5 { bottom: 14px; left: 16%; animation-delay: 2s; }
.dist-node.n6 { bottom: 14px; right: 16%; animation-delay: 2.5s; }
.ai-platforms { background: #fff; border-radius: 16px; padding: 16px; box-shadow: var(--shadow-card); }
.ai-platforms-title { font-size: 12px; color: var(--gray-text); font-weight: 600; margin-bottom: 12px; text-align: center; }
.ai-platform-row { display: flex; justify-content: space-between; gap: 6px; flex-wrap: wrap; }
.ai-p { display: inline-flex; align-items: center; gap: 5px; font-size: 12px; font-weight: 500; color: #3a3a3c; }

/* ---------- CMSE 四步闭环 · 卡片流程图 ---------- */
.cmse-cards {
  display: flex; align-items: stretch;
  gap: 0; max-width: 1100px; margin: 0 auto;
  padding: 24px 0 4px;
}
.cmse-card {
  flex: 1; min-width: 0;
  position: relative;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 1px 4px rgba(0,0,0,.05);
  padding: 28px 28px 24px;
  margin-right: 28px;
  overflow: hidden;
  transition: transform .25s ease, box-shadow .25s ease;
}
.cmse-card:last-child { margin-right: 0; }
.cmse-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0,0,0,.06);
}

/* 左侧色条 */
.cmse-card-inner {
  position: relative; z-index: 1;
}
.cmse-card::before {
  content: '';
  position: absolute; left: 0; top: 18px; bottom: 18px;
  width: 3px; border-radius: 0 2px 2px 0;
  background: var(--accent);
}

/* 编号水印 */
.cmse-card-num {
  position: absolute; right: 14px; top: 6px;
  font-size: 64px; font-weight: 800; line-height: 1;
  color: var(--accent); opacity: .05;
  z-index: 0; pointer-events: none;
}

/* 标题 */
.cmse-card-title {
  font-size: 18px; font-weight: 700; color: #1a1a2e;
  margin: 0 0 4px;
}

/* 副标题 */
.cmse-card-sub {
  font-size: 13px; color: #667085;
  margin: 0 0 10px;
}

/* 详细列表 */
.cmse-card-detail {
  list-style: none; padding: 0; margin: 0;
  font-size: 12.5px; color: #6B7280; line-height: 1.72;
}
.cmse-card-detail li::before {
  content: '·'; margin-right: 6px;
  color: var(--accent); font-weight: 700;
}

/* 卡片间连接箭头 */
.cmse-card-arrow {
  position: absolute; right: -22px; top: 50%; transform: translateY(-50%);
  width: 24px; height: 24px; z-index: 2;
}
.cmse-card:last-child .cmse-card-arrow { display: none; }

/* 闭环回环指示 */
.cmse-loop {
  display: flex; flex-direction: column; align-items: center;
  padding: 6px 0 0;
}
.cmse-loop-svg {
  width: 220px; height: 44px;
}
.cmse-loop-label {
  font-size: 12.5px; color: #6B7280; letter-spacing: .5px;
  margin-top: -10px;
}

/* ---------- 移动端 vertical ---------- */
.cmse-mobile { display: none; }
.cmse-mstep {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 12px 0;
}
.cmse-mnum {
  flex-shrink: 0;
  width: 38px; height: 38px; border-radius: 10px;
  background: var(--accent); color: #fff;
  font-size: 15px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.cmse-mbody { flex: 1; min-width: 0; }
.cmse-mbody strong {
  font-size: 16px; font-weight: 700; color: #1a1a2e;
}
.cmse-mbody span {
  font-size: 12.5px; color: #667085; margin-left: 8px;
}
.cmse-mbody p {
  font-size: 12.5px; color: #6B7280; line-height: 1.55; margin: 4px 0 0;
}
.cmse-marrow {
  text-align: center; font-size: 15px; color: #3B82F6; padding: 0 0 4px 38px;
}
.cmse-mloop {
  text-align: center; font-size: 13px; color: #6B7280; padding: 14px 0 4px;
}

/* ---------- DSS ---------- */
.dss-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.dss-card {
  background: var(--gray); border-radius: var(--radius-lg); padding: 36px 30px;
  transition: box-shadow .35s var(--ease), transform .35s var(--ease);
}
.dss-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }
.dss-letter {
  font-size: 40px; font-weight: 800; color: var(--accent); letter-spacing: -0.02em;
  margin-bottom: 14px;
}
.dss-letter span { font-size: 16px; font-weight: 600; color: var(--gray-text); margin-left: 2px; }
.dss-card h3 { font-size: 19px; font-weight: 700; margin-bottom: 10px; }
.dss-card p { font-size: 14.5px; color: var(--gray-text); line-height: 1.65; }

/* ---------- 行业 pill + 面板 ---------- */
.pill-row {
  display: flex; gap: 10px; overflow-x: auto; padding: 4px 4px 14px;
  scrollbar-width: none; -webkit-overflow-scrolling: touch;
  max-width: 900px; margin: 0 auto 36px;
}
.pill-row::-webkit-scrollbar { display: none; }
.pill {
  flex: 0 0 auto; border: 1px solid var(--line); background: #fff;
  font-size: 14.5px; font-weight: 500; color: #3a3a3c;
  padding: 10px 22px; border-radius: 980px;
  transition: background .25s, color .25s, border-color .25s, box-shadow .25s;
}
.pill:hover { border-color: var(--accent); color: var(--accent); box-shadow: 0 4px 14px rgba(108,92,231,.14); }
.pill.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.industry-card {
  display: grid; grid-template-columns: 1.6fr 1fr; gap: 0;
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius-lg); overflow: hidden;
}
.industry-main { padding: 40px 42px; }
.industry-tag {
  display: inline-block; font-size: 13px; font-weight: 600; color: var(--accent);
  background: rgba(108,92,231,.09); padding: 5px 12px; border-radius: 980px; margin-bottom: 16px;
}
.industry-main h3 { font-size: clamp(22px, 2.6vw, 30px); font-weight: 700; letter-spacing: -0.01em; margin-bottom: 24px; }
.industry-flow { display: grid; gap: 18px; }
.ib-label { font-size: 13px; font-weight: 700; color: var(--ink); margin-bottom: 6px; letter-spacing: .06em; }
.industry-block p:last-child { font-size: 14.5px; color: var(--gray-text); line-height: 1.7; }
.industry-stat {
  background: var(--gray); padding: 40px 32px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; gap: 6px;
}
.is-num { font-size: clamp(48px, 5vw, 60px); font-weight: 700; letter-spacing: -0.03em; line-height: 1; }
.is-num span { font-size: .55em; color: var(--accent); }
.is-label { font-size: 14px; color: var(--gray-text); margin-bottom: 18px; }
.industry-panel.switching .industry-card { animation: panelIn .45s var(--ease); }
@keyframes panelIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }

/* ---------- CTA 横幅 ---------- */
.cta-banner {
  background: linear-gradient(135deg, #6C5CE7 0%, #5A4BD1 60%, #4A3EB8 100%);
  color: #fff; text-align: center; padding: 88px 24px;
}
.cta-banner h2 { font-size: clamp(30px, 4vw, 44px); font-weight: 700; letter-spacing: -0.02em; }
.cta-banner p { margin: 16px 0 30px; font-size: 17px; opacity: .88; }

/* ---------- 关于 / 联系 ---------- */
.about-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 64px; align-items: start; }
.about-text { margin-top: 18px; font-size: 15.5px; color: #4b4b50; line-height: 1.75; }
.about-photo { margin-top: 28px; border-radius: var(--radius-lg); overflow: hidden; background: var(--gray); }
.about-photo img { width: 100%; height: 240px; object-fit: cover; }
.about-contact { margin-top: 28px; }
.ac-phone { font-size: 30px; font-weight: 700; letter-spacing: -0.01em; color: var(--accent); }
.ac-note { margin-top: 6px; font-size: 14px; color: var(--gray-text); }
.ac-addr { margin-top: 4px; font-size: 14px; color: var(--gray-text); }

.contact-card {
  background: #fff; border-radius: 16px; padding: 40px 36px;
  box-shadow: 0 2px 16px rgba(0,0,0,.06), 0 8px 32px rgba(0,0,0,.04);
}
.contact-card h3 { font-size: 24px; font-weight: 700; letter-spacing: -0.01em; }
.contact-sub { margin: 8px 0 26px; font-size: 14px; color: var(--gray-text); }
.form-row { margin-bottom: 16px; }
.form-row label { display: block; font-size: 13.5px; font-weight: 600; margin-bottom: 7px; }
.form-row input, .form-row select, .form-row textarea {
  width: 100%; font-family: inherit; font-size: 14.5px; color: var(--ink);
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  padding: 12px 14px; outline: none; transition: border-color .25s, box-shadow .25s;
  appearance: none;
}
.form-row textarea { resize: vertical; min-height: 76px; }
.form-row input:focus, .form-row select:focus, .form-row textarea:focus {
  border-color: var(--accent); box-shadow: 0 0 0 3px rgba(108,92,231,.15);
}
.form-row input.invalid { border-color: #E5484D; box-shadow: 0 0 0 3px rgba(229,72,77,.12); }
.form-msg { margin-top: 12px; font-size: 13.5px; min-height: 20px; }
.form-msg.ok { color: #0E9F6E; font-weight: 600; }
.form-msg.err { color: #E5484D; font-weight: 600; }

/* ---------- Footer ---------- */
.footer { background: var(--gray); padding: 56px 0 28px; }
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr 1fr; gap: 32px;
  padding-bottom: 36px; border-bottom: 1px solid var(--line);
}
.footer-brand p { margin-top: 14px; font-size: 12.5px; color: var(--gray-text); line-height: 1.7; }
.footer-col h4 { font-size: 13px; font-weight: 600; color: var(--ink); margin-bottom: 14px; }
.footer-col a { display: block; font-size: 12.5px; color: var(--gray-text); margin-bottom: 10px; transition: color .2s; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom { padding-top: 22px; }
.footer-bottom p { font-size: 12px; color: var(--gray-text); }

/* ---------- 滚动显现（苹果式 fadeIn + 上移，禁 scale） ---------- */
.reveal { opacity: 0; transform: translateY(12px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .ai-typing span, .hero-badge, .dist-node { animation: none; }
  * { transition-duration: .01ms !important; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .section { padding: 72px 0; }
  .hero { padding: 120px 0 72px; }
  .hero-inner { grid-template-columns: 1fr; gap: 44px; }
  .hero-visual { max-width: 520px; margin: 0 auto; width: 100%; }
  .value-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-bar { grid-template-columns: repeat(2, 1fr); gap: 36px 16px; }
  .stat:last-child { grid-column: 1 / -1; }
  .feature { grid-template-columns: 1fr; gap: 36px; padding: 56px 24px; }
  .feature-reverse .feature-copy { order: 1; }
  .feature-reverse .feature-visual { order: 2; }
  .dss-grid { grid-template-columns: 1fr; }
  .cmse-cards, .cmse-loop { display: none; }
  .cmse-mobile { display: block; max-width: 480px; margin: 0 auto; }
  .industry-card { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; gap: 44px; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-brand { grid-column: 1 / -1; }

  .nav-burger { display: block; }
  .nav-links {
    position: fixed; top: 56px; left: 0; right: 0;
    background: rgba(255,255,255,.97); backdrop-filter: blur(20px);
    flex-direction: column; align-items: stretch; gap: 0;
    padding: 8px 24px 20px; border-bottom: 1px solid var(--line);
    transform: translateY(-8px); opacity: 0; pointer-events: none;
    transition: opacity .3s var(--ease), transform .3s var(--ease);
  }
  .nav-links.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-links a { padding: 14px 0; font-size: 16px; border-bottom: 1px solid #F0F0F4; }
  .nav-links a:last-child { border-bottom: none; }
  .nav-cta { text-align: center; margin-top: 12px; padding: 12px; }
}

@media (max-width: 560px) {
  .value-grid { grid-template-columns: 1fr; }
  .hero-ctas .btn { width: 100%; justify-content: center; }
  .hero-ctas .btn-link { width: auto; }
  .doc-tpl { grid-template-columns: repeat(3, 1fr); }
  .cmse-cards, .cmse-loop { display: none; }
  .cmse-mobile { display: block; max-width: 420px; margin: 0 auto; padding: 0 12px; }
  .industry-main { padding: 30px 24px; }
  .contact-card { padding: 30px 22px; }
}