/* ============================================
   询盘云 AI · xunpanyunai.cn
   设计系统
   ============================================ */

:root {
  --bg: #0a0e1a;
  --bg-2: #101728;
  --bg-3: #161f35;
  --surface: #131c30;
  --border: rgba(120, 160, 255, 0.12);
  --border-2: rgba(120, 160, 255, 0.22);

  --text: #e8edf7;
  --text-2: #9aa8c4;
  --text-3: #64748b;

  --accent: #3b82f6;
  --accent-2: #06b6d4;
  --accent-3: #8b5cf6;
  --grad: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
  --grad-2: linear-gradient(135deg, #8b5cf6 0%, #3b82f6 100%);

  --radius: 14px;
  --radius-lg: 20px;
  --max: 1180px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

/* ---------- 背景光效 ---------- */
body::before {
  content: "";
  position: fixed;
  top: -20%;
  left: 50%;
  width: 900px;
  height: 900px;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 65%);
  pointer-events: none;
  z-index: 0;
}

/* ---------- 导航 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 26, 0.82);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 19px;
  letter-spacing: -0.3px;
}

.logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: var(--grad);
  display: grid;
  place-items: center;
  font-size: 16px;
  font-weight: 800;
  color: #fff;
  flex-shrink: 0;
}

.logo em { font-style: normal; color: var(--accent-2); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-size: 14.5px;
  color: var(--text-2);
  transition: color 0.2s;
  position: relative;
}

.nav-links a:hover { color: var(--text); }
.nav-links a.active { color: var(--accent-2); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: 10px;
  font-size: 14.5px;
  font-weight: 600;
  border: none;
  transition: all 0.25s;
  white-space: nowrap;
}

.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(59, 130, 246, 0.5);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-2);
}

.btn-ghost:hover { background: var(--bg-3); border-color: var(--accent); }

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 24px;
  padding: 4px;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 96px 0 80px;
  z-index: 1;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 64px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 100px;
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.25);
  font-size: 13px;
  color: var(--accent-2);
  font-weight: 500;
  margin-bottom: 24px;
}

.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-2);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

h1 {
  font-size: clamp(36px, 4.5vw, 56px);
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: -1.2px;
  margin-bottom: 24px;
}

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p.lead {
  font-size: 17.5px;
  color: var(--text-2);
  line-height: 1.75;
  margin-bottom: 32px;
  max-width: 540px;
}

.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 40px; }

.hero-stats {
  display: flex;
  gap: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}

.stat-num {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -1px;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
}

.stat-label { font-size: 13px; color: var(--text-3); margin-top: 2px; }

/* ---------- Hero 卡片 ---------- */
.hero-card {
  background: linear-gradient(160deg, var(--bg-3), var(--surface));
  border: 1px solid var(--border-2);
  border-radius: var(--radius-lg);
  padding: 26px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
  position: relative;
  overflow: hidden;
}

.hero-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-2), transparent);
}

.hc-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  font-size: 13px;
  color: var(--text-3);
}

.hc-tag {
  padding: 3px 10px;
  border-radius: 6px;
  background: rgba(16, 185, 129, 0.12);
  color: #10b981;
  font-size: 11.5px;
  font-weight: 600;
}

.metric-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 13px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

.metric-row:last-child { border-bottom: none; }
.metric-row span:first-child { color: var(--text-2); }

.metric-val { font-weight: 700; font-variant-numeric: tabular-nums; }
.metric-val.up { color: #10b981; }
.metric-val.warn { color: #f59e0b; }

.bar-track {
  height: 6px;
  border-radius: 3px;
  background: var(--bg);
  overflow: hidden;
  margin-top: 8px;
}

.bar-fill {
  height: 100%;
  border-radius: 3px;
  background: var(--grad);
  animation: grow 1.4s ease-out;
}

@keyframes grow { from { width: 0 !important; } }

/* ---------- 通用区块 ---------- */
section { position: relative; z-index: 1; padding: 88px 0; }
section.alt { background: var(--bg-2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

.sec-head { text-align: center; max-width: 700px; margin: 0 auto 56px; }

.sec-tag {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-2);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 14px;
}

h2 {
  font-size: clamp(27px, 3.2vw, 38px);
  font-weight: 800;
  letter-spacing: -0.8px;
  line-height: 1.3;
  margin-bottom: 16px;
}

h3 { font-size: 19px; font-weight: 700; letter-spacing: -0.3px; margin-bottom: 10px; }

.sec-head p { color: var(--text-2); font-size: 16px; }

/* ---------- 卡片网格 ---------- */
.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: all 0.28s;
  position: relative;
  overflow: hidden;
}

.card:hover {
  border-color: var(--border-2);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: 11px;
  display: grid;
  place-items: center;
  font-size: 21px;
  margin-bottom: 18px;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.card p { color: var(--text-2); font-size: 14.5px; line-height: 1.7; }

.card ul {
  list-style: none;
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.card ul li {
  font-size: 14px;
  color: var(--text-2);
  padding-left: 20px;
  position: relative;
}

.card ul li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent-2);
  font-size: 13px;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-2);
}

.card-link:hover { gap: 10px; }

/* ---------- 诊断维度 ---------- */
.dim-list { display: flex; flex-direction: column; gap: 12px; }

.dim {
  display: grid;
  grid-template-columns: 44px 1fr auto;
  gap: 18px;
  align-items: center;
  padding: 20px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all 0.25s;
}

.dim:hover { border-color: var(--accent); background: var(--bg-3); }

.dim-num {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--bg);
  border: 1px solid var(--border-2);
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 15px;
  color: var(--accent-2);
  font-variant-numeric: tabular-nums;
}

.dim h3 { margin-bottom: 4px; font-size: 16.5px; }
.dim p { color: var(--text-2); font-size: 14px; }

.dim-badge {
  font-size: 12px;
  padding: 5px 12px;
  border-radius: 100px;
  background: rgba(245, 158, 11, 0.12);
  color: #f59e0b;
  border: 1px solid rgba(245, 158, 11, 0.25);
  white-space: nowrap;
  font-weight: 600;
}

.dim-badge.hot {
  background: rgba(239, 68, 68, 0.12);
  color: #ef4444;
  border-color: rgba(239, 68, 68, 0.25);
}

/* ---------- 流程 ---------- */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; position: relative; }

.flow::before {
  content: "";
  position: absolute;
  top: 26px;
  left: 8%;
  right: 8%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-2), transparent);
}

.flow-step { text-align: center; position: relative; padding: 0 8px; }

.flow-dot {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  margin: 0 auto 18px;
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 16px;
  color: var(--accent-2);
  position: relative;
  z-index: 1;
}

.flow-step h3 { font-size: 16px; }
.flow-step p { font-size: 13.5px; color: var(--text-2); line-height: 1.65; }

/* ---------- 案例 ---------- */
.case {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}

.case-nums { display: flex; gap: 26px; margin: 18px 0; flex-wrap: wrap; }

.case-num { font-size: 26px; font-weight: 800; color: var(--accent-2); letter-spacing: -0.6px; }
.case-num-label { font-size: 12px; color: var(--text-3); }

/* ---------- CTA ---------- */
.cta-box {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.14), rgba(6, 182, 212, 0.1));
  border: 1px solid var(--border-2);
  border-radius: var(--radius-lg);
  padding: 56px 48px;
  text-align: center;
}

.cta-box h2 { margin-bottom: 14px; }
.cta-box p { color: var(--text-2); margin-bottom: 28px; font-size: 16px; }

/* ---------- 表单 ---------- */
.form { max-width: 560px; margin: 0 auto; text-align: left; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 14px; }

input, textarea, select {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg);
  border: 1px solid var(--border-2);
  border-radius: 10px;
  color: var(--text);
  font-size: 14.5px;
  font-family: inherit;
  transition: border-color 0.2s;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent);
}

input::placeholder, textarea::placeholder { color: var(--text-3); }

textarea { resize: vertical; min-height: 100px; }

.form-note { font-size: 12.5px; color: var(--text-3); margin-top: 12px; text-align: center; }

.form-ok {
  display: none;
  padding: 16px;
  border-radius: 10px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #10b981;
  font-size: 14px;
  text-align: center;
}

/* ---------- 博客 ---------- */
.blog-hero { padding: 64px 0 40px; text-align: center; }

.blog-list { display: flex; flex-direction: column; gap: 16px; max-width: 820px; margin: 0 auto; }

.post-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 28px;
  transition: all 0.25s;
}

.post-card:hover { border-color: var(--accent); transform: translateX(4px); }

.post-meta {
  display: flex;
  gap: 14px;
  font-size: 12.5px;
  color: var(--text-3);
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.post-tag {
  padding: 2px 9px;
  border-radius: 5px;
  background: rgba(59, 130, 246, 0.12);
  color: var(--accent-2);
  font-weight: 600;
}

.post-card h3 { font-size: 18.5px; margin-bottom: 8px; }
.post-card p { font-size: 14px; color: var(--text-2); }

/* ---------- 文章页 ---------- */
.article { max-width: 760px; margin: 0 auto; padding: 56px 24px 88px; }

.article-head { margin-bottom: 40px; padding-bottom: 28px; border-bottom: 1px solid var(--border); }

.article h1 { font-size: clamp(28px, 3.4vw, 40px); margin-bottom: 18px; }

.article-body { font-size: 16.5px; line-height: 1.9; color: #cbd5e1; }
.article-body h2 {
  font-size: 25px;
  margin: 44px 0 16px;
  padding-top: 8px;
  color: var(--text);
}
.article-body h3 { font-size: 19px; margin: 32px 0 12px; color: var(--text); }
.article-body p { margin-bottom: 18px; }
.article-body ul, .article-body ol { margin: 0 0 20px 22px; }
.article-body li { margin-bottom: 9px; }
.article-body strong { color: var(--text); font-weight: 600; }
.article-body a { color: var(--accent-2); text-decoration: underline; text-underline-offset: 3px; }

.article-body blockquote {
  margin: 24px 0;
  padding: 18px 24px;
  border-left: 3px solid var(--accent);
  background: var(--surface);
  border-radius: 0 10px 10px 0;
  color: var(--text-2);
  font-size: 15.5px;
}

.article-body code {
  padding: 2px 7px;
  border-radius: 5px;
  background: var(--bg-3);
  font-size: 14px;
  color: var(--accent-2);
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
}

.article-body pre {
  margin: 22px 0;
  padding: 20px;
  border-radius: 12px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  overflow-x: auto;
}

.article-body pre code { background: none; padding: 0; color: #cbd5e1; }

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 14.5px;
}

.article-body th, .article-body td {
  padding: 11px 14px;
  border: 1px solid var(--border);
  text-align: left;
}

.article-body th { background: var(--bg-3); font-weight: 600; color: var(--text); }
.article-body td { color: var(--text-2); }

/* ---------- 页脚 ---------- */
footer {
  border-top: 1px solid var(--border);
  padding: 56px 0 32px;
  background: var(--bg-2);
  position: relative;
  z-index: 1;
}

.foot-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 44px;
}

.foot-col h4 {
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.foot-col ul { list-style: none; display: flex; flex-direction: column; gap: 11px; }
.foot-col a { font-size: 14px; color: var(--text-2); transition: color 0.2s; }
.foot-col a:hover { color: var(--accent-2); }
.foot-desc { font-size: 14px; color: var(--text-2); line-height: 1.7; margin-top: 14px; max-width: 320px; }

.foot-bottom {
  padding-top: 26px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  gap: 20px;
  font-size: 13px;
  color: var(--text-3);
  flex-wrap: wrap;
}

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; gap: 44px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .flow { grid-template-columns: repeat(2, 1fr); }
  .flow::before { display: none; }
  .foot-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 720px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--bg-2);
    border-bottom: 1px solid var(--border);
    padding: 20px 24px;
    gap: 18px;
    align-items: flex-start;
  }
  .menu-toggle { display: block; }
  .nav .btn-primary { display: none; }

  section { padding: 60px 0; }
  .hero { padding: 56px 0 52px; }
  .grid-3, .grid-2, .grid-4 { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; }
  .hero-stats { gap: 24px; }
  .stat-num { font-size: 24px; }
  .cta-box { padding: 36px 24px; }
  .form-row { grid-template-columns: 1fr; }
  .dim { grid-template-columns: 40px 1fr; }
  .dim-badge { grid-column: 2; justify-self: start; }
  .foot-grid { grid-template-columns: 1fr; gap: 28px; }
  .foot-bottom { flex-direction: column; }
}