/* ========== 基础变量 ========== */
:root {
  --blue: #0d2f8c;
  --blue-2: #1a4fd6;
  --blue-soft: #eef3ff;
  --ink: #1b2330;
  --ink-2: #4a5666;
  --line: #e3e8f0;
  --bg: #ffffff;
  --bg-soft: #f6f8fc;
  --radius: 14px;
  --shadow: 0 6px 24px rgba(13, 47, 140, .08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; }
a { text-decoration: none; }

.wrap {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

.center { text-align: center; }

/* ========== 顶部栏 ========== */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-logo { width: 34px; height: 34px; }

.brand-name {
  font-size: 19px;
  font-weight: 700;
  color: var(--blue);
  letter-spacing: .5px;
}

/* ========== 按钮 ========== */
.btn {
  display: inline-block;
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-2) 100%);
  color: #fff;
  font-weight: 700;
  border-radius: 999px;
  padding: 14px 38px;
  font-size: 17px;
  box-shadow: 0 8px 20px rgba(13, 47, 140, .22);
  transition: transform .18s ease, box-shadow .18s ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 26px rgba(13, 47, 140, .3);
}

.btn-sm { padding: 9px 22px; font-size: 15px; }
.btn-lg { padding: 17px 52px; font-size: 19px; }

/* ========== 首屏 ========== */
.hero {
  position: relative;
  padding: 84px 0 72px;
  overflow: hidden;
  background: linear-gradient(160deg, #f4f7ff 0%, #eaf0ff 45%, #ffffff 100%);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .22;
}

.hero-inner { position: relative; z-index: 1; text-align: center; }

.hero-title {
  margin: 0 0 26px;
  font-size: 34px;
  line-height: 1.5;
  font-weight: 800;
  color: var(--blue);
  letter-spacing: 1px;
}

.hero-title .dot { margin: 0 12px; color: var(--blue-2); }

.hero-desc {
  max-width: 900px;
  margin: 0 auto;
  font-size: 16px;
  color: var(--ink-2);
  text-align: left;
}

/* ========== 通用区块 ========== */
.section { padding: 72px 0; }
.section:nth-child(even) { background: var(--bg-soft); }

.eyebrow {
  margin: 0 0 8px;
  font-size: 14px;
  font-weight: 700;
  color: var(--blue-2);
  letter-spacing: 2px;
}

.sect-title {
  margin: 0 0 34px;
  font-size: 28px;
  font-weight: 800;
  color: var(--blue);
}

.sect-sub {
  margin: -18px 0 26px;
  font-size: 16px;
  color: var(--ink-2);
}

/* ========== 能力总览 5 卡 ========== */
.grid5 {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
}

.cap-mini {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 18px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: transform .18s ease;
}

.cap-mini:hover { transform: translateY(-4px); }

.cap-ico { width: 40px; height: 40px; margin-bottom: 12px; }

.cap-mini h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--blue);
}

.cap-mini p {
  margin: 0;
  font-size: 13px;
  color: var(--ink-2);
}

/* ========== 下载区 ========== */
.download { background: linear-gradient(160deg, #f4f7ff 0%, #ffffff 100%); }

.dl-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 52px 32px;
  text-align: center;
  box-shadow: 0 12px 34px rgba(13, 47, 140, .1);
}

.dl-btn-wrap { margin: 8px 0 20px; }

.dl-meta {
  margin: 0 0 34px;
  font-size: 14px;
  color: var(--ink-2);
}

.grid3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 26px;
}

.sell {
  background: var(--blue-soft);
  border-radius: var(--radius);
  padding: 22px 18px;
  text-align: center;
}

.sell h4 {
  margin: 0 0 6px;
  font-size: 17px;
  color: var(--blue);
}

.sell p { margin: 0; font-size: 14px; color: var(--ink-2); }

/* ========== 核心功能 ========== */
.feat {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 28px;
  margin-bottom: 22px;
  box-shadow: var(--shadow);
}

.feat-head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 14px;
}

.num {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-2) 100%);
  color: #fff;
  font-weight: 800;
  font-size: 18px;
}

.feat-head h3 {
  margin: 0;
  font-size: 21px;
  color: var(--blue);
}

.feat-sub {
  margin: 4px 0 0;
  font-size: 14px;
  color: var(--ink-2);
}

.feat-body {
  margin: 12px 0;
  font-size: 15px;
  color: var(--ink-2);
}

.feat-body.strong { font-weight: 700; color: var(--blue); }

.tag-label {
  margin: 16px 0 10px;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
}

/* ========== 标签 ========== */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 10px 0 6px;
}

.tags span {
  display: inline-block;
  background: var(--blue-soft);
  color: var(--blue);
  border-radius: 6px;
  padding: 6px 12px;
  font-size: 13px;
}

.tags.sm span {
  background: #f0f4fb;
  color: var(--ink-2);
  font-size: 12px;
  padding: 4px 10px;
}

/* ========== 流程 / 步骤 ========== */
.flow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin: 16px 0;
  font-size: 15px;
}

.flow span {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 16px;
  color: var(--ink-2);
}

.flow span.hl {
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-2) 100%);
  color: #fff;
  border-color: transparent;
  font-weight: 700;
}

.flow i { color: var(--blue-2); font-style: normal; font-weight: 700; }

.stepgrid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin: 18px 0;
}

.step {
  background: var(--blue-soft);
  border-radius: 12px;
  padding: 18px 14px;
  text-align: center;
}

.step h4 { margin: 0 0 6px; font-size: 16px; color: var(--blue); }
.step p { margin: 0; font-size: 13px; color: var(--ink-2); }

/* ========== 0301-0306 子卡 ========== */
.subgrid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 18px 0;
}

.sub {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px;
}

.sub h4 {
  margin: 0 0 10px;
  font-size: 16px;
  color: var(--blue);
}

.sub h4 b {
  display: inline-block;
  margin-right: 8px;
  color: var(--blue-2);
}

.sub p { margin: 8px 0; font-size: 14px; color: var(--ink-2); }

.sub-end {
  font-weight: 700;
  color: var(--blue);
  font-size: 13px;
}

/* ========== 核心价值 ========== */
.value-head {
  margin: 0 0 16px;
  font-size: 22px;
  color: var(--blue);
}

.contrast {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  margin: 18px 0;
}

.ct-left, .ct-right { flex: 1 1 300px; }

.ct-label {
  margin: 0 0 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
}

.ct-right .ct-label { visibility: hidden; }

.ct-arrow {
  flex: 0 0 auto;
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-2) 100%);
  color: #fff;
  border-radius: 999px;
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 700;
}

/* ========== 结尾 & 页脚 ========== */
.end { background: linear-gradient(160deg, #eef3ff 0%, #ffffff 100%); }

.end-list {
  margin: 0 0 16px;
  font-size: 16px;
  font-weight: 700;
  color: var(--blue-2);
}

.footer {
  background: #0e2049;
  color: #c8d4ee;
  padding: 34px 0;
  text-align: center;
  font-size: 14px;
}

.footer-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 10px;
  color: #fff;
  font-weight: 700;
  font-size: 17px;
}

.footer p { margin: 4px 0; }

.footer-tip { font-size: 13px; color: #8fa3cc; }

/* ========== 响应式 ========== */
@media (max-width: 960px) {
  .grid5 { grid-template-columns: repeat(2, 1fr); }
  .grid3 { grid-template-columns: 1fr; }
  .subgrid { grid-template-columns: 1fr; }
  .stepgrid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .hero { padding: 56px 0 46px; }
  .hero-title { font-size: 25px; }
  .sect-title { font-size: 23px; }
  .grid5 { grid-template-columns: 1fr; }
  .stepgrid { grid-template-columns: 1fr; }
  .feat { padding: 22px 18px; }
  .dl-card { padding: 36px 18px; }
  .btn-lg { padding: 15px 32px; font-size: 17px; }
}