/* ============ 基础与配色（与系统前端、销售 deck 同一套 slate+blue 体系） ============ */
:root {
  --navy: #0F172A;
  --navy2: #1E293B;
  --ink: #1E293B;
  --muted: #64748B;
  --muted-ice: #94A3B8;
  --ice: #F8FAFC;
  --ice-line: #CBD5E1;
  --line: #E2E8F0;
  --accent: #2563EB;
  --accent-dark: #1D4ED8;
  --accent-light: #60A5FA;
  --green: #059669;
  --white: #FFFFFF;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3 { line-height: 1.35; }

h2 {
  font-size: clamp(26px, 4vw, 34px);
  letter-spacing: 0.01em;
  margin-bottom: 16px;
}

h3 { font-size: 17px; margin-bottom: 8px; }

a { color: inherit; text-decoration: none; }

ul, ol { list-style: none; }

/* ============ 导航 ============ */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  height: 60px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.02em;
  color: var(--navy);
}

.nav-mark { width: 22px; height: 22px; color: var(--accent); }

.nav-links {
  display: flex;
  gap: 24px;
  margin-left: auto;
  font-size: 14px;
  color: var(--muted);
}

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

/* ============ 按钮 ============ */
.btn {
  display: inline-block;
  border-radius: 8px;
  font-weight: 600;
  text-align: center;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

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

.btn-primary:hover { background: var(--accent-dark); }

.btn-ghost {
  border: 1px solid rgba(148, 163, 184, 0.5);
  color: var(--ice);
}

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

.btn-sm { padding: 8px 18px; font-size: 14px; }

.btn-lg { padding: 13px 26px; font-size: 16px; }

/* ============ Hero ============ */
.dark {
  background: var(--navy);
  color: var(--ice);
}

.hero {
  background:
    radial-gradient(ellipse 70% 55% at 50% 0%, rgba(37, 99, 235, 0.16), transparent),
    var(--navy);
}

.hero-inner {
  padding: clamp(72px, 12vw, 128px) 24px clamp(64px, 10vw, 112px);
  text-align: center;
}

.hero-kicker {
  font-size: 14px;
  letter-spacing: 0.12em;
  color: var(--muted-ice);
  margin-bottom: 28px;
}

.hero-claim {
  font-size: clamp(48px, 10vw, 84px);
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--white);
  margin-bottom: 28px;
}

.hero-badges {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 30px;
}

.hero-badges li {
  border: 1px solid rgba(96, 165, 250, 0.45);
  color: var(--accent-light);
  border-radius: 999px;
  padding: 5px 18px;
  font-size: 14px;
  letter-spacing: 0.08em;
}

.hero-sub {
  font-size: clamp(16px, 2.4vw, 19px);
  color: var(--ice);
  margin-bottom: 36px;
}

.hero-cta {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 44px;
}

.hero-position {
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--accent-light);
}

.br-mobile { display: none; }

/* ============ 区块通用 ============ */
.section { padding: clamp(64px, 9vw, 104px) 0; }

.section-alt { background: var(--ice); }

.kicker {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--accent);
  margin-bottom: 10px;
}

.lead {
  font-size: 16.5px;
  color: var(--muted);
  max-width: 720px;
  margin-bottom: 40px;
}

.lead strong { color: var(--ink); }

.dark .lead, .lead-dark { color: var(--muted-ice); }

.dark h2 { color: var(--white); }

/* ============ 网格与卡片 ============ */
.grid { display: grid; gap: 20px; }

.grid-2 { grid-template-columns: repeat(2, 1fr); }

.grid-3 { grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 26px 24px;
}

.card p { font-size: 15px; color: var(--muted); }

.card h3 { color: var(--navy); }

.card-dark {
  background: var(--navy2);
  border-color: rgba(148, 163, 184, 0.18);
}

.card-dark h3 { color: var(--white); }

.card-dark p { color: var(--muted-ice); }

/* 痛点卡 */
.leak-grid { margin-top: 36px; }

.tag {
  display: inline-block;
  background: var(--ice);
  border: 1px solid var(--line);
  color: var(--navy2);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  border-radius: 6px;
  padding: 3px 10px;
  margin-bottom: 14px;
}

/* ============ 收口句 ============ */
.closer {
  margin-top: 44px;
  text-align: center;
}

.closer-main {
  font-size: clamp(18px, 3vw, 22px);
  color: var(--ink);
}

.closer-main strong { color: var(--accent); }

.closer-note {
  margin-top: 10px;
  font-size: 15px;
  color: var(--muted);
}

/* ============ 流程链 ============ */
.flow {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 40px;
  counter-reset: flow;
}

.flow li {
  counter-increment: flow;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 9px 20px 9px 12px;
  font-size: 15px;
  font-weight: 600;
  color: var(--navy);
}

.flow li::before {
  content: counter(flow, decimal-leading-zero);
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  background: rgba(37, 99, 235, 0.08);
  border-radius: 999px;
  padding: 2px 9px;
}

.flow li:not(:last-child)::after {
  content: "→";
  color: var(--ice-line);
  margin-left: 4px;
}

/* ============ 功能模块 ============ */
.feature-grid { margin-top: 8px; }

.feature ul {
  margin: 14px 0 16px;
  display: grid;
  gap: 9px;
}

.feature li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  color: var(--muted);
}

.feature li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.72em;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 1px;
}

.feature li strong { color: var(--ink); }

.tag-line {
  background: rgba(37, 99, 235, 0.07);
  border-color: rgba(37, 99, 235, 0.22);
  color: var(--accent);
}

.feature-money {
  border-top: 1px solid var(--line);
  padding-top: 14px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--accent);
}

/* ============ 对比表 ============ */
.table-wrap { overflow-x: auto; }

.vs-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  font-size: 15px;
}

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

.vs-table thead th {
  background: var(--navy);
  color: var(--ice);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.vs-table tbody tr:last-child td { border-bottom: none; }

.vs-table td:first-child { font-weight: 600; color: var(--navy); }

.vs-table .no { color: var(--muted); }

.vs-table .no::before { content: "✗ "; color: var(--muted-ice); }

.vs-table .yes { color: var(--ink); font-weight: 500; }

.vs-table .yes::before { content: "✓ "; color: var(--green); font-weight: 700; }

/* ============ 前后对照 ============ */
.before-after {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 44px;
}

.ba-col {
  border-radius: 12px;
  padding: 28px 26px;
}

.ba-col h3 { font-size: 15.5px; margin-bottom: 16px; }

.ba-col ul { display: grid; gap: 10px; }

.ba-col li {
  position: relative;
  padding-left: 24px;
  font-size: 14.5px;
}

.ba-before {
  background: var(--ice);
  border: 1px solid var(--line);
}

.ba-before h3 { color: var(--muted); }

.ba-before li { color: var(--muted); }

.ba-before li::before {
  content: "✗";
  position: absolute;
  left: 0;
  color: var(--muted-ice);
}

.ba-after {
  background: var(--white);
  border: 1px solid rgba(37, 99, 235, 0.35);
}

.ba-after h3 { color: var(--accent); }

.ba-after li { color: var(--ink); }

.ba-after li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--green);
  font-weight: 700;
}

.pull-quote {
  margin: 48px auto 0;
  max-width: 640px;
  text-align: center;
  font-size: clamp(19px, 3vw, 24px);
  font-weight: 700;
  color: var(--navy);
}

.disclaimer {
  margin-top: 18px;
  text-align: center;
  font-size: 12.5px;
  color: var(--muted-ice);
}

/* ============ CTA 区 ============ */
.cta {
  background:
    radial-gradient(ellipse 70% 60% at 50% 100%, rgba(37, 99, 235, 0.14), transparent),
    var(--navy);
  border-top: 1px solid rgba(148, 163, 184, 0.14);
  text-align: center;
}

.cta .lead { margin-left: auto; margin-right: auto; }

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 8px 0 48px;
  text-align: left;
}

.steps li {
  background: var(--navy2);
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 12px;
  padding: 26px 24px;
}

.step-num {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent-light);
  margin-bottom: 12px;
}

.steps h3 { color: var(--white); font-size: 16px; }

.steps p { font-size: 14px; color: var(--muted-ice); }

.contact-box {
  max-width: 460px;
  margin: 0 auto;
  background: var(--navy2);
  border: 1px solid rgba(96, 165, 250, 0.35);
  border-radius: 14px;
  padding: 32px 30px;
}

.contact-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 18px;
}

.contact-list { display: grid; gap: 12px; text-align: left; }

.contact-list li {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 15.5px;
  color: var(--ice);
}

.contact-label {
  flex-shrink: 0;
  font-size: 13px;
  color: var(--muted-ice);
  border: 1px solid rgba(148, 163, 184, 0.3);
  border-radius: 6px;
  padding: 2px 10px;
}

/* ============ 页脚 ============ */
.footer {
  background: var(--navy);
  border-top: 1px solid rgba(148, 163, 184, 0.14);
  padding: 28px 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--muted-ice);
}

/* ============ 响应式 ============ */
@media (max-width: 900px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .nav-links { display: none; }

  .grid-2, .grid-3, .before-after, .steps { grid-template-columns: 1fr; }

  .br-mobile { display: block; }

  .hero-cta .btn { width: 100%; }

  .flow { flex-direction: column; align-items: flex-start; }

  .flow li:not(:last-child)::after { content: "↓"; }
}