:root {
  --ink: #0b1220;
  --ink-2: #334155;
  --muted: #64748b;
  --line: #e6ebf3;
  --bg: #ffffff;
  --soft: #f5f8fc;
  --brand: #1660f5;
  --brand-2: #0ea5e9;
  --brand-ink: #0b47c4;
  --accent: #10b981;
  --radius: 16px;
  --shadow: 0 1px 2px rgba(15, 23, 42, .04), 0 8px 24px rgba(15, 23, 42, .07);
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 68px; }
body { margin: 0; font-family: var(--font); color: var(--ink); background: var(--bg); font-size: 15.5px; line-height: 1.7; -webkit-font-smoothing: antialiased; padding-bottom: calc(64px + env(safe-area-inset-bottom)); }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { margin: 0; line-height: 1.3; letter-spacing: -.01em; }
p { margin: 0; }
button { font: inherit; cursor: pointer; }
.hp { position: absolute !important; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.m-wrap { padding: 0 16px; }

/* ---------- 顶部导航 ---------- */
.m-nav { position: sticky; top: 0; z-index: 40; display: flex; align-items: center; justify-content: space-between; height: 56px; padding: 0 16px; background: rgba(255, 255, 255, .9); backdrop-filter: saturate(180%) blur(14px); -webkit-backdrop-filter: saturate(180%) blur(14px); border-bottom: 1px solid transparent; transition: border-color .2s; }
.m-nav.scrolled { border-bottom-color: var(--line); }
.m-logo { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 16.5px; }
.m-logo span { width: 28px; height: 28px; border-radius: 8px; background: linear-gradient(135deg, var(--brand), var(--brand-2)); color: #fff; display: grid; place-items: center; font-size: 15px; }
.m-menu { width: 40px; height: 40px; margin-right: -8px; border: 0; background: none; display: grid; place-content: center; gap: 5px; }
.m-menu i { display: block; width: 20px; height: 2px; border-radius: 2px; background: var(--ink); transition: transform .22s, opacity .22s; }
.m-menu[aria-expanded="true"] i:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.m-menu[aria-expanded="true"] i:nth-child(2) { opacity: 0; }
.m-menu[aria-expanded="true"] i:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.m-drawer { position: fixed; top: 56px; left: 0; right: 0; z-index: 39; background: #fff; border-bottom: 1px solid var(--line); padding: 4px 16px 16px; display: grid; gap: 0; transform: translateY(-8px); opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s; box-shadow: 0 20px 40px rgba(15, 23, 42, .1); }
.m-drawer.open { opacity: 1; transform: none; pointer-events: auto; }
.m-drawer a { padding: 13px 2px; border-bottom: 1px solid var(--line); font-size: 16px; }
.m-drawer a.on { color: var(--brand); font-weight: 600; }
.m-drawer-pc { color: var(--muted); font-size: 14px !important; border-bottom: 0 !important; margin-top: 6px; }

/* ---------- 区块 ---------- */
.m-sec { padding: 40px 0; }
.m-sec-soft { background: var(--soft); }
.m-head { margin-bottom: 22px; }
.m-head .eyebrow { display: block; color: var(--brand); font-weight: 600; font-size: 13px; letter-spacing: .06em; margin-bottom: 8px; }
.m-head h2 { font-size: 22px; font-weight: 700; }
.m-head p { color: var(--muted); font-size: 14.5px; margin-top: 8px; }

/* ---------- Hero ---------- */
.m-hero { position: relative; overflow: hidden; padding: 32px 0 28px; background: radial-gradient(520px 300px at 88% 0%, rgba(14, 165, 233, .16), transparent 70%), radial-gradient(500px 280px at 0% 12%, rgba(22, 96, 245, .13), transparent 70%); }
.m-badge { display: inline-flex; padding: 5px 12px; border-radius: 999px; background: #eef4ff; color: var(--brand-ink); font-size: 12.5px; font-weight: 600; }
.m-hero h1 { font-size: 31px; font-weight: 800; margin: 14px 0 12px; letter-spacing: -.02em; }
.m-hero h1 em { font-style: normal; background: linear-gradient(90deg, var(--brand), var(--brand-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.m-hero .lead { color: var(--muted); font-size: 15px; }
.m-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 22px; }
.m-btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; height: 46px; padding: 0 18px; border-radius: 12px; border: 1px solid transparent; background: var(--brand); color: #fff; font-weight: 600; font-size: 15.5px; }
.m-btn:active { transform: scale(.985); }
.m-btn-ghost { background: #fff; color: var(--ink); border-color: var(--line); }
.m-btn-block { width: 100%; }
.m-stats { display: grid; grid-template-columns: repeat(2, 1fr); margin-top: 24px; border: 1px solid var(--line); border-radius: 14px; background: rgba(255, 255, 255, .8); overflow: hidden; }
.m-stats div { padding: 14px 16px; }
.m-stats div:nth-child(odd) { border-right: 1px solid var(--line); }
.m-stats div:nth-child(n+3) { border-top: 1px solid var(--line); }
.m-stats dt { font-size: 12.5px; color: var(--muted); }
.m-stats dd { margin: 2px 0 0; font-size: 22px; font-weight: 800; }

/* ---------- 卡片列表 ---------- */
.m-list { display: grid; gap: 12px; }
.m-card { display: block; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; }
.m-card:active { background: var(--soft); }
.m-card-top { display: flex; align-items: flex-start; gap: 12px; }
.m-ico { width: 42px; height: 42px; flex: none; border-radius: 12px; background: var(--soft); display: grid; place-items: center; font-size: 21px; }
.m-card h3 { font-size: 16.5px; margin-bottom: 4px; }
.m-card .m-sub { font-size: 12.5px; color: var(--muted); }
.m-card p { color: var(--muted); font-size: 14px; margin-top: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.m-more { display: flex; align-items: center; justify-content: space-between; margin-top: 12px; font-size: 13.5px; color: var(--brand); font-weight: 600; }
.m-metric { font-size: 12.5px; font-weight: 700; color: var(--accent); background: rgba(16, 185, 129, .1); padding: 2px 9px; border-radius: 999px; }
.m-case-cover { height: 96px; border-radius: 12px; background: linear-gradient(135deg, #e0ebff, #e0f7ff) center/cover; display: grid; place-items: center; margin-bottom: 12px; position: relative; }
.m-case-cover b { font-size: 34px; color: rgba(22, 96, 245, .22); }
.m-ind { position: absolute; left: 10px; top: 10px; padding: 2px 10px; border-radius: 999px; background: rgba(255, 255, 255, .92); font-size: 11.5px; font-weight: 600; }
.m-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.m-chip { display: inline-block; padding: 2px 9px; border-radius: 999px; background: #eef4ff; color: var(--brand-ink); font-size: 11.5px; font-weight: 600; }
.m-tabs { display: flex; gap: 8px; overflow-x: auto; padding: 0 16px 16px; margin: 0 -16px; scrollbar-width: none; }
.m-tabs::-webkit-scrollbar { display: none; }
.m-tab { flex: none; padding: 6px 14px; border-radius: 999px; border: 1px solid var(--line); background: #fff; color: var(--ink-2); font-size: 13.5px; white-space: nowrap; }
.m-tab.on { background: var(--ink); border-color: var(--ink); color: #fff; }

/* ---------- 内页 ---------- */
.m-page-head { padding: 26px 0 20px; background: linear-gradient(180deg, #f3f7ff, #fff); }
.m-crumbs { font-size: 12.5px; color: var(--muted); margin-bottom: 10px; }
.m-page-head h1 { font-size: 25px; font-weight: 800; }
.m-page-head .lead { color: var(--muted); font-size: 14.5px; margin-top: 8px; }
.m-prose p { color: var(--ink-2); font-size: 15px; margin-bottom: 12px; }
.m-prose h2 { font-size: 18px; margin: 26px 0 10px; }
.m-prose h2:first-child { margin-top: 0; }
.m-ticks { list-style: none; margin: 0; padding: 0; display: grid; gap: 9px; }
.m-ticks li { position: relative; padding-left: 24px; font-size: 15px; color: var(--ink-2); }
.m-ticks li::before { content: "✓"; position: absolute; left: 0; top: 0; width: 17px; height: 17px; border-radius: 50%; background: rgba(16, 185, 129, .14); color: var(--accent); font-size: 11px; font-weight: 700; display: grid; place-items: center; }
.m-flow { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; counter-reset: f; }
.m-flow li { counter-increment: f; position: relative; padding: 12px 14px 12px 46px; border: 1px solid var(--line); border-radius: 12px; font-size: 14.5px; background: #fff; }
.m-flow li::before { content: counter(f); position: absolute; left: 13px; top: 11px; width: 22px; height: 22px; border-radius: 50%; background: #eef4ff; color: var(--brand); font-size: 12px; font-weight: 700; display: grid; place-items: center; }
.m-sol { border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.m-sol summary { list-style: none; display: flex; align-items: center; gap: 12px; padding: 16px; }
.m-sol summary::-webkit-details-marker { display: none; }
.m-sol-n { font-size: 20px; font-weight: 800; color: #cbd5e1; font-variant-numeric: tabular-nums; }
.m-sol[open] .m-sol-n { color: var(--brand); }
.m-sol-t { flex: 1; display: flex; flex-direction: column; }
.m-sol-t strong { font-size: 15.5px; }
.m-sol-t small { color: var(--muted); font-size: 12.5px; }
.m-sol-x { width: 24px; height: 24px; border-radius: 50%; background: var(--soft); position: relative; flex: none; }
.m-sol-x::before, .m-sol-x::after { content: ""; position: absolute; left: 7px; right: 7px; top: 11px; height: 2px; background: var(--ink-2); }
.m-sol-x::after { transform: rotate(90deg); transition: transform .2s; }
.m-sol[open] .m-sol-x::after { transform: rotate(0); }
.m-sol-body { padding: 0 16px 18px; display: grid; gap: 14px; }
.m-sol-body h4 { font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.m-trio { display: grid; gap: 10px; margin-bottom: 20px; }
.m-trio div { background: var(--soft); border-radius: 12px; padding: 14px 16px; }
.m-trio span { font-size: 12.5px; color: var(--muted); font-weight: 600; }
.m-trio p { margin-top: 5px; font-size: 14.5px; color: var(--ink-2); }
.m-trio .hl { background: rgba(16, 185, 129, .09); }
.m-trio .hl span { color: var(--accent); }
.m-aside { margin-top: 24px; }
.m-aside-card { border: 1px solid var(--line); border-radius: 14px; padding: 18px; background: #fff; }
.m-aside-card h3 { font-size: 16px; margin-bottom: 6px; }
.m-aside-card p { color: var(--muted); font-size: 14px; margin-bottom: 14px; }
.m-terms { border-left: 2px solid var(--line); padding-left: 16px; }
.m-term { position: relative; padding-bottom: 16px; }
.m-term::before { content: ""; position: absolute; left: -22px; top: 6px; width: 10px; height: 10px; border-radius: 50%; background: #fff; border: 2px solid var(--brand); }
.m-term strong { font-size: 14.5px; }
.m-term p { color: var(--muted); font-size: 14px; }
.m-info { display: grid; grid-template-columns: 74px 1fr; gap: 8px 10px; font-size: 14px; }
.m-info dt { color: var(--muted); }
.m-info dd { margin: 0; }

/* ---------- 表单 ---------- */
.m-form { display: grid; gap: 14px; }
.m-form label { display: grid; gap: 6px; font-size: 13.5px; font-weight: 600; color: var(--ink-2); }
.m-form label b { color: #ef4444; }
.m-form input, .m-form select, .m-form textarea { font: inherit; font-weight: 400; font-size: 16px; padding: 12px 14px; border: 1px solid var(--line); border-radius: 12px; background: #fff; color: var(--ink); width: 100%; }
.m-form input:focus, .m-form select:focus, .m-form textarea:focus { outline: 0; border-color: var(--brand); box-shadow: 0 0 0 3px rgba(22, 96, 245, .12); }
.m-form .invalid { border-color: #ef4444; }
.m-err { color: #ef4444; font-size: 13.5px; }
.m-note { font-size: 12.5px; color: var(--muted); text-align: center; }
.m-done { text-align: center; padding: 36px 20px; }
.m-done-icon { width: 56px; height: 56px; border-radius: 50%; margin: 0 auto 14px; background: rgba(16, 185, 129, .12); color: var(--accent); font-size: 28px; display: grid; place-items: center; }
.m-done h2 { font-size: 19px; margin-bottom: 6px; }
.m-done p { color: var(--muted); font-size: 14px; margin-bottom: 18px; }

/* ---------- CTA / 页脚 ---------- */
.m-cta { margin: 40px 16px; padding: 26px 22px; border-radius: 18px; background: linear-gradient(120deg, var(--brand), #0b7ad1 60%, var(--brand-2)); color: #fff; text-align: center; }
.m-cta h2 { font-size: 20px; }
.m-cta p { font-size: 14px; opacity: .88; margin-top: 6px; }
.m-cta-btns { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 18px; }
.m-cta .m-btn { background: #fff; color: var(--brand-ink); }
.m-cta .m-btn-ghost { background: transparent; color: #fff; border-color: rgba(255, 255, 255, .45); }
.m-foot { background: var(--ink); color: #94a3b8; padding: 32px 16px 28px; font-size: 13.5px; }
.m-foot-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.m-foot-brand strong { color: #fff; font-size: 15.5px; }
.m-foot-brand p { font-size: 12.5px; }
.m-logo-mark { width: 30px; height: 30px; border-radius: 8px; background: linear-gradient(135deg, var(--brand), var(--brand-2)); color: #fff; display: grid; place-items: center; font-size: 15px; flex: none; }
.m-foot p { margin-bottom: 4px; }
.m-foot a { color: #cbd5e1; }
.m-foot-desc { color: #cbd5e1; }
.m-foot-links { display: flex; flex-wrap: wrap; gap: 14px; margin: 16px 0 12px; padding-top: 14px; border-top: 1px solid rgba(255, 255, 255, .08); }
.m-foot-copy, .m-foot-icp { font-size: 12.5px; }

/* ---------- 底部标签栏 ---------- */
.m-tabbar { position: fixed; left: 0; right: 0; bottom: 0; z-index: 45; display: grid; grid-template-columns: repeat(5, 1fr); background: rgba(255, 255, 255, .96); backdrop-filter: saturate(180%) blur(14px); -webkit-backdrop-filter: saturate(180%) blur(14px); border-top: 1px solid var(--line); padding-bottom: env(safe-area-inset-bottom); }
.m-tabbar a, .m-tab-chat { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; height: 58px; border: 0; background: none; color: var(--muted); font-size: 10.5px; font-weight: 500; }
.m-tabbar a.on { color: var(--brand); }
.m-tab-chat { color: var(--brand); }

/* ---------- 智能客服 ---------- */
.m-chat { position: fixed; inset: 0; z-index: 80; display: flex; flex-direction: column; background: #fff; animation: mSlideUp .22s ease-out; }
.m-chat[hidden] { display: none; }
@keyframes mSlideUp { from { transform: translateY(14px); opacity: .6; } }
.m-chat-head { display: flex; align-items: center; justify-content: space-between; padding: 14px 16px; padding-top: calc(14px + env(safe-area-inset-top)); background: var(--ink); color: #fff; flex: none; }
.m-chat-head strong { font-size: 15.5px; }
.m-chat-head small { display: block; font-size: 11.5px; color: #94a3b8; font-weight: 400; }
.m-chat-close { border: 0; background: none; color: #fff; font-size: 28px; line-height: 1; opacity: .75; padding: 0 4px 4px; }
.m-chat-body { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 10px; background: var(--soft); -webkit-overflow-scrolling: touch; }
.m-msg { max-width: 84%; padding: 10px 14px; border-radius: 14px; font-size: 14.5px; line-height: 1.65; white-space: pre-wrap; word-break: break-word; }
.m-msg-ai { align-self: flex-start; background: #fff; border: 1px solid var(--line); border-bottom-left-radius: 4px; }
.m-msg-me { align-self: flex-end; background: var(--brand); color: #fff; border-bottom-right-radius: 4px; }
.m-msg-typing { display: inline-flex; gap: 4px; align-items: center; }
.m-msg-typing i { width: 6px; height: 6px; border-radius: 50%; background: #94a3b8; animation: mBlink 1.2s infinite; }
.m-msg-typing i:nth-child(2) { animation-delay: .2s; }
.m-msg-typing i:nth-child(3) { animation-delay: .4s; }
@keyframes mBlink { 0%, 60%, 100% { opacity: .3; } 30% { opacity: 1; } }
.m-chat-quick { display: flex; flex-wrap: wrap; gap: 6px; padding: 10px 14px 0; background: var(--soft); flex: none; }
.m-chat-quick button { border: 1px solid var(--line); background: #fff; border-radius: 999px; padding: 5px 12px; font-size: 12.5px; color: var(--ink-2); }
.m-chat-quick button:active { border-color: var(--brand); color: var(--brand); }
.m-chat-input { display: flex; gap: 8px; padding: 10px 12px; background: var(--soft); flex: none; }
.m-chat-input input { flex: 1; font: inherit; font-size: 16px; padding: 11px 16px; border: 1px solid var(--line); border-radius: 999px; outline: 0; background: #fff; }
.m-chat-input input:focus { border-color: var(--brand); }
.m-chat-input button { width: 44px; height: 44px; flex: none; border: 0; border-radius: 50%; background: var(--brand); color: #fff; display: grid; place-items: center; }
.m-chat-input[hidden], .m-chat-lead[hidden], .m-chat-quick[hidden] { display: none; }
.m-chat-lead { display: grid; gap: 8px; padding: 14px; background: var(--soft); flex: none; }
.m-chat-lead p { font-size: 13px; color: var(--muted); }
.m-chat-lead input { font: inherit; font-size: 16px; padding: 11px 14px; border: 1px solid var(--line); border-radius: 12px; outline: 0; }
.m-chat-lead input:focus { border-color: var(--brand); }
.m-chat-lead-actions { display: flex; justify-content: flex-end; gap: 8px; }
.m-chat-lead-actions [data-cancel] { background: none; border: 0; color: var(--muted); font-size: 14px; padding: 10px 6px; }
.m-chat-lead-actions [type=submit] { border: 0; background: var(--brand); color: #fff; font-weight: 600; border-radius: 10px; padding: 10px 22px; font-size: 14.5px; }
.m-chat-foot { font-size: 11.5px; color: var(--muted); text-align: center; padding: 8px 8px calc(8px + env(safe-area-inset-bottom)); border-top: 1px solid var(--line); flex: none; }
.m-chat-foot a { color: var(--brand); }

/* ---------- 动效 ---------- */
.js .m-reveal { opacity: 0; transform: translateY(10px); transition: opacity .5s, transform .5s; }
.js .m-reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .m-reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
  .m-chat { animation: none; }
}