/* ============================================================
   站点首页(业务介绍落地页)· 样式
   ------------------------------------------------------------
   与后台一致的视觉基调(蓝 + 灰),不引任何外部字体/CDN,
   全部用系统字体栈,保证内网离线可用。
   类名统一 lp- 前缀,不与后台 app.css 冲突(首页也不加载 app.css)。
   ============================================================ */

:root {
    --lp-primary: #2563eb;
    --lp-primary-d: #1d4ed8;
    --lp-ink: #0f172a;
    --lp-ink-2: #334155;
    --lp-ink-3: #64748b;
    --lp-line: #e2e8f0;
    --lp-bg: #ffffff;
    --lp-bg-alt: #f8fafc;
    --lp-radius: 14px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial,
                 "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--lp-ink);
    background: var(--lp-bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

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

.lp-wrap { max-width: 1160px; margin: 0 auto; padding: 0 20px; }
.lp-wrap-narrow { max-width: 860px; }

/* ---------------- 顶部导航 ---------------- */
.lp-nav {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, .92);
    backdrop-filter: saturate(180%) blur(8px);
    border-bottom: 1px solid var(--lp-line);
}
.lp-nav-in { display: flex; align-items: center; gap: 18px; height: 64px; }

.lp-brand { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }
.lp-logo {
    width: 36px; height: 36px; border-radius: 10px;
    background: linear-gradient(135deg, var(--lp-primary) 0%, #0ea5e9 100%);
    color: #fff; display: inline-flex; align-items: center; justify-content: center;
}
.lp-logo svg { width: 20px; height: 20px; }
.lp-brand-txt { display: flex; flex-direction: column; line-height: 1.25; }
.lp-brand-txt b { font-size: 15px; }
.lp-brand-txt i { font-style: normal; font-size: 12px; color: var(--lp-ink-3); }

.lp-menu { display: flex; gap: 22px; margin-left: auto; font-size: 14px; color: var(--lp-ink-2); }
.lp-menu a:hover { color: var(--lp-primary); }

.lp-actions { display: flex; align-items: center; gap: 10px; margin-left: 8px; }

/* ---------------- 按钮 ---------------- */
.lp-btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 9px 16px; border-radius: 10px;
    border: 1px solid var(--lp-line); background: #fff; color: var(--lp-ink);
    font-size: 14px; font-family: inherit; cursor: pointer; white-space: nowrap;
    transition: all .15s;
}
.lp-btn:hover { border-color: #cbd5e1; transform: translateY(-1px); }
.lp-btn-primary {
    background: var(--lp-primary); border-color: var(--lp-primary); color: #fff;
    box-shadow: 0 6px 16px rgba(37, 99, 235, .22);
}
.lp-btn-primary:hover { background: var(--lp-primary-d); border-color: var(--lp-primary-d); }
.lp-btn-lg { padding: 12px 22px; font-size: 15px; border-radius: 12px; }
.lp-btn-ghost { background: transparent; }
.lp-caret { font-size: 10px; opacity: .85; }
.lp-arrow { font-size: 13px; }

/* ---------------- 登录下拉 ---------------- */
.lp-login { position: relative; }
.lp-drop {
    position: absolute; right: 0; top: calc(100% + 8px);
    width: 260px; padding: 6px;
    background: #fff; border: 1px solid var(--lp-line); border-radius: 12px;
    box-shadow: 0 16px 40px rgba(15, 23, 42, .14);
    display: none; z-index: 60;
}
.lp-login.on .lp-drop { display: block; }
.lp-drop a {
    display: block; padding: 10px 12px; border-radius: 9px;
    font-size: 14px; color: var(--lp-ink);
}
.lp-drop a:hover { background: #f1f5f9; }
.lp-drop a b { display: block; font-size: 14px; }
.lp-drop a span { display: block; font-size: 12px; color: var(--lp-ink-3); }

.lp-burger {
    display: none; border: 1px solid var(--lp-line); background: #fff;
    border-radius: 10px; width: 40px; height: 36px; font-size: 16px; cursor: pointer;
}

/* ---------------- 首屏 ---------------- */
.lp-hero {
    background:
        radial-gradient(900px 420px at 12% -10%, #dbeafe 0%, rgba(219, 234, 254, 0) 60%),
        radial-gradient(700px 380px at 100% 0%, #e0f2fe 0%, rgba(224, 242, 254, 0) 55%),
        var(--lp-bg);
    border-bottom: 1px solid var(--lp-line);
}
.lp-hero-in {
    display: grid; grid-template-columns: 1.05fr .95fr; gap: 40px;
    align-items: center; padding-top: 64px; padding-bottom: 64px;
}
.lp-badge {
    display: inline-block; padding: 4px 12px; border-radius: 999px;
    background: #eff6ff; color: var(--lp-primary-d); font-size: 12px;
    border: 1px solid #bfdbfe; margin-bottom: 16px;
}
.lp-hero h1 { margin: 0 0 14px; font-size: 38px; line-height: 1.28; letter-spacing: -.5px; }
.lp-lead { margin: 0 0 22px; color: var(--lp-ink-2); font-size: 16px; max-width: 620px; }
.lp-hero-cta { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 18px; }
.lp-hero-points { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px 20px; color: var(--lp-ink-3); font-size: 13px; }

/* 右侧流程卡 */
.lp-card {
    background: #fff; border: 1px solid var(--lp-line); border-radius: 16px;
    box-shadow: 0 18px 44px rgba(15, 23, 42, .10); overflow: hidden;
}
.lp-card-head {
    display: flex; align-items: center; gap: 6px;
    padding: 12px 14px; border-bottom: 1px solid var(--lp-line); background: #f8fafc;
}
.lp-card-head b { margin-left: 8px; font-size: 13px; color: var(--lp-ink-2); }
.lp-dot { width: 9px; height: 9px; border-radius: 50%; background: #e2e8f0; }
.lp-dot:first-child { background: #fca5a5; }
.lp-dot:nth-child(2) { background: #fcd34d; }
.lp-dot:nth-child(3) { background: #86efac; }
.lp-timeline { list-style: none; margin: 0; padding: 8px 14px 16px; }
.lp-timeline li {
    position: relative; padding: 12px 0 12px 26px; border-left: 2px dashed var(--lp-line); margin-left: 5px;
}
.lp-timeline li:last-child { border-left-color: transparent; }
.lp-timeline li::before {
    content: ''; position: absolute; left: -7px; top: 18px;
    width: 12px; height: 12px; border-radius: 50%; background: #cbd5e1; border: 2px solid #fff;
}
.lp-timeline li.on::before { background: var(--lp-primary); }
.lp-timeline li b { display: block; font-size: 14px; }
.lp-timeline li span { font-size: 12px; color: var(--lp-ink-3); }

/* ---------------- 数字条 ---------------- */
.lp-numbers { background: var(--lp-ink); color: #fff; }
.lp-numbers-in { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 18px; padding-top: 26px; padding-bottom: 26px; }
.lp-number b { display: block; font-size: 26px; line-height: 1.2; }
.lp-number span { font-size: 13px; color: #cbd5e1; }

/* ---------------- 通用段落 ---------------- */
.lp-sec { padding: 70px 0; }
.lp-sec-alt { background: var(--lp-bg-alt); border-top: 1px solid var(--lp-line); border-bottom: 1px solid var(--lp-line); }
.lp-h2 { margin: 0 0 8px; font-size: 28px; letter-spacing: -.3px; }
.lp-sub { margin: 0 0 30px; color: var(--lp-ink-3); font-size: 15px; }

.lp-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.lp-feature {
    background: #fff; border: 1px solid var(--lp-line); border-radius: var(--lp-radius);
    padding: 20px 18px; transition: all .18s;
}
.lp-feature:hover { border-color: #bfdbfe; box-shadow: 0 10px 26px rgba(37, 99, 235, .10); transform: translateY(-2px); }
.lp-feature-no { display: inline-block; font-size: 12px; color: var(--lp-primary); font-weight: 700; letter-spacing: 1px; }
.lp-feature h3 { margin: 6px 0 8px; font-size: 16px; }
.lp-feature p { margin: 0; font-size: 13.5px; color: var(--lp-ink-2); }

.lp-scenes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.lp-scene {
    background: #fff; border: 1px solid var(--lp-line); border-left: 3px solid var(--lp-primary);
    border-radius: 12px; padding: 16px 18px;
}
.lp-scene h3 { margin: 0 0 6px; font-size: 15px; }
.lp-scene p { margin: 0; font-size: 13.5px; color: var(--lp-ink-2); }

.lp-flow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.lp-flow-item {
    background: #fff; border: 1px solid var(--lp-line); border-radius: 12px; padding: 18px 16px; position: relative;
}
.lp-flow-no {
    display: inline-flex; align-items: center; justify-content: center;
    width: 26px; height: 26px; border-radius: 50%;
    background: var(--lp-primary); color: #fff; font-size: 13px; font-weight: 700; margin-bottom: 10px;
}
.lp-flow-item h3 { margin: 0 0 6px; font-size: 15px; }
.lp-flow-item p { margin: 0; font-size: 13px; color: var(--lp-ink-2); }

.lp-roles { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.lp-role { background: #fff; border: 1px solid var(--lp-line); border-radius: 12px; padding: 16px; }
.lp-role h3 { margin: 0 0 6px; font-size: 15px; color: var(--lp-primary-d); }
.lp-role p { margin: 0; font-size: 13px; color: var(--lp-ink-2); }

/* ---------------- FAQ ---------------- */
.lp-faq-item {
    background: #fff; border: 1px solid var(--lp-line); border-radius: 12px;
    padding: 14px 16px; margin-bottom: 10px;
}
.lp-faq-item summary { cursor: pointer; font-weight: 600; font-size: 15px; list-style: none; }
.lp-faq-item summary::-webkit-details-marker { display: none; }
.lp-faq-item summary::after { content: '＋'; float: right; color: var(--lp-ink-3); font-weight: 400; }
.lp-faq-item[open] summary::after { content: '－'; }
.lp-faq-item p { margin: 10px 0 0; color: var(--lp-ink-2); font-size: 14px; }

/* ---------------- 底部 CTA ---------------- */
.lp-cta { background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%); color: #fff; }
.lp-cta-in {
    display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
    gap: 20px; padding-top: 40px; padding-bottom: 40px;
}
.lp-cta h2 { margin: 0 0 6px; font-size: 24px; }
.lp-cta p { margin: 0; color: #dbeafe; font-size: 14px; }
.lp-cta-btns { display: flex; flex-wrap: wrap; gap: 10px; }
.lp-cta .lp-btn { background: rgba(255, 255, 255, .14); border-color: rgba(255, 255, 255, .35); color: #fff; }
.lp-cta .lp-btn-primary { background: #fff; border-color: #fff; color: var(--lp-primary-d); box-shadow: none; }
.lp-cta .lp-btn-ghost { background: transparent; }

/* ---------------- 页脚 ---------------- */
.lp-foot { background: #0b1220; color: #94a3b8; font-size: 13px; }
.lp-foot-in {
    display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
    gap: 10px 24px; padding-top: 22px; padding-bottom: 22px;
}
.lp-foot b { color: #e2e8f0; display: block; font-size: 14px; }
.lp-foot-links { display: flex; flex-wrap: wrap; gap: 16px; }
.lp-foot-links a:hover { color: #fff; }
.lp-icp a { color: #64748b; }
.lp-icp a:hover { color: #94a3b8; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 1000px) {
    .lp-grid { grid-template-columns: repeat(2, 1fr); }
    .lp-scenes { grid-template-columns: repeat(2, 1fr); }
    .lp-flow { grid-template-columns: repeat(2, 1fr); }
    .lp-roles { grid-template-columns: repeat(2, 1fr); }
    .lp-hero-in { grid-template-columns: 1fr; padding-top: 44px; padding-bottom: 44px; }
    .lp-hero h1 { font-size: 30px; }
}
@media (max-width: 720px) {
    .lp-menu {
        display: none; position: absolute; left: 0; right: 0; top: 64px;
        flex-direction: column; gap: 0; background: #fff;
        border-bottom: 1px solid var(--lp-line); padding: 8px 20px 14px;
    }
    .lp-menu.on { display: flex; }
    .lp-menu a { padding: 10px 0; border-bottom: 1px dashed var(--lp-line); }
    .lp-burger { display: block; }
    .lp-actions { margin-left: auto; }
    .lp-grid, .lp-scenes, .lp-flow, .lp-roles { grid-template-columns: 1fr; }
    .lp-numbers-in { gap: 14px; }
    .lp-number b { font-size: 22px; }
    .lp-sec { padding: 48px 0; }
    .lp-h2 { font-size: 23px; }
}