:root {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  color: #172b50;
  background: #f4f7fc;
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: #f4f7fc; }
a { color: inherit; }
[hidden] { display: none !important; }

.site-shell {
  min-height: 100vh;
  overflow: hidden;
  background:
    radial-gradient(circle at 78% 8%, rgba(132, 169, 255, .22), transparent 30rem),
    linear-gradient(180deg, #f8fbff 0%, #f2f6fd 58%, #f7f9fc 100%);
}

.site-nav,
.section-wrap,
.site-footer { width: min(1180px, calc(100% - 48px)); margin: 0 auto; }
.site-nav { height: 78px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 11px; color: #173568; text-decoration: none; font-size: 20px; letter-spacing: -.02em; }
.brand-mark,
.brand-logo { width: 38px; height: 38px; border-radius: 12px; }
.brand-mark { display: grid; place-items: center; color: #fff; background: linear-gradient(140deg, #286cff, #5d54f2); font-size: 25px; box-shadow: 0 8px 18px rgba(55, 100, 224, .2); }
.brand-logo { object-fit: cover; background: #fff; box-shadow: 0 8px 18px rgba(55, 100, 224, .12); }
.nav-links { display: flex; gap: 34px; margin-left: 80px; }
.nav-links a, .login-link { color: #71809b; text-decoration: none; font-size: 14px; transition: color .2s ease; }
.nav-links a:hover, .login-link:hover { color: #216cff; }
.nav-actions { display: flex; align-items: center; gap: 20px; }

.button { display: inline-flex; align-items: center; gap: 9px; padding: 14px 21px; border: 0; border-radius: 11px; background: #216cff; color: #fff; text-decoration: none; font-weight: 650; box-shadow: 0 12px 24px rgba(33, 108, 255, .2); transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); background: #155fe9; box-shadow: 0 15px 28px rgba(33, 108, 255, .28); }
.button-small { padding: 10px 16px; font-size: 14px; }

.hero { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); align-items: center; gap: 54px; padding-top: 82px; padding-bottom: 114px; }
.eyebrow { color: #6e82a7; font-size: 11px; font-weight: 750; letter-spacing: .18em; }
.hero-copy .eyebrow { display: flex; align-items: center; gap: 9px; }
.hero-copy .eyebrow i { width: 7px; height: 7px; border-radius: 50%; background: #216cff; }
.hero-copy h1 { max-width: 570px; margin: 20px 0 19px; color: #132b53; font-size: clamp(42px, 5.2vw, 65px); line-height: 1.1; letter-spacing: -.055em; }
.hero-copy h1 em, .split-copy h2 em { color: #216cff; font-style: normal; }
.hero-copy p, .split-copy p, .section-heading p, .security-section p { max-width: 490px; margin: 0; color: #6c7e9c; font-size: 16px; line-height: 1.85; }
.hero-actions { display: flex; align-items: center; gap: 24px; margin-top: 31px; }
.text-link { color: #4d6590; font-size: 14px; text-decoration: none; }
.text-link:hover { color: #216cff; }
.trust-list { display: flex; gap: 22px; margin-top: 27px; color: #8292ac; font-size: 12px; }

.hero-visual { position: relative; min-height: 430px; display: grid; place-items: center; }
.glow { position: absolute; width: 510px; height: 390px; border-radius: 50%; background: radial-gradient(circle, rgba(139, 183, 255, .33), transparent 68%); filter: blur(8px); }
.dashboard-card { position: relative; width: min(520px, 100%); padding: 20px; border: 1px solid rgba(255,255,255,.9); border-radius: 25px; background: rgba(255,255,255,.74); box-shadow: 0 28px 68px rgba(61, 95, 157, .16), inset 0 1px rgba(255,255,255,.95); backdrop-filter: blur(20px); transform: rotate(1.2deg); }
.window-bar { display: flex; align-items: center; gap: 6px; padding-bottom: 18px; color: #8292ad; font-size: 11px; }
.window-bar i { width: 7px; height: 7px; border-radius: 50%; background: #cbd6e6; }
.window-bar span { margin-left: 8px; }
.metric-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.metric-grid > div { position: relative; padding: 20px; border-radius: 15px; background: rgba(255,255,255,.95); box-shadow: 0 7px 20px rgba(72,115,180,.07); }
.metric-grid small, .chart-card small { display: block; color: #8a9ab4; font-size: 11px; }
.metric-grid b { display: block; margin-top: 7px; color: #20365b; font-size: 28px; }
.metric-grid strong { color: #23b874; font-size: 11px; }
.metric-icon { position: absolute; right: 18px; bottom: 19px; color: #4a7cff; font-size: 27px; }
.chart-card { margin-top: 14px; padding: 19px 20px 12px; border-radius: 15px; background: rgba(255,255,255,.88); }
.chart-card > div:first-child { display: flex; justify-content: space-between; font-size: 14px; }
.chart-card svg { width: 100%; height: 145px; margin-top: 10px; }
.window-foot { display: flex; justify-content: space-between; padding: 13px 3px 0; color: #8495b0; font-size: 11px; }

.content-section { padding-top: 86px; padding-bottom: 90px; }
.section-heading { text-align: center; }
.section-heading h2, .security-section h2 { margin: 14px 0 12px; color: #172d54; font-size: 36px; letter-spacing: -.035em; }
.section-heading p { max-width: none; font-size: 15px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 44px; }
.feature-grid article { padding: 29px; border: 1px solid rgba(255,255,255,.92); border-radius: 20px; background: rgba(255,255,255,.72); box-shadow: 0 15px 38px rgba(88,117,165,.08); transition: transform .2s ease, box-shadow .2s ease; }
.feature-grid article:hover { transform: translateY(-4px); box-shadow: 0 20px 40px rgba(88,117,165,.13); }
.feature-icon { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 14px; font-size: 22px; }
.feature-icon.blue { color: #216cff; background: #e7efff; }
.feature-icon.purple { color: #7658f4; background: #eeeaff; }
.feature-icon.cyan { color: #13a7b9; background: #e2f8fa; }
.feature-grid h3 { margin: 20px 0 9px; color: #21375e; font-size: 19px; }
.feature-grid p { min-height: 52px; margin: 0 0 18px; color: #70819e; font-size: 14px; line-height: 1.75; }
.feature-grid a { color: #216cff; font-size: 13px; text-decoration: none; }

.split-section { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 98px; align-items: center; padding-top: 90px; padding-bottom: 90px; }
.phone-card { width: 280px; height: 420px; margin: auto; padding: 39px 18px 18px; border: 8px solid #172d58; border-radius: 42px; background: linear-gradient(155deg,#dbe9ff,#f8fbff); box-shadow: 18px 25px 50px rgba(65,107,168,.2); transform: rotate(-6deg); text-align: center; }
.phone-card > span { display: inline-block; padding: 5px 10px; border-radius: 20px; color: #216cff; background: #eaf1ff; font-size: 10px; }
.phone-card h3 { margin: 27px 0 20px; color: #1d3359; font-size: 23px; line-height: 1.45; }
.mini-qr { display: grid; place-items: center; width: 108px; height: 108px; margin: auto; border-radius: 15px; color: #216cff; background: #e9f0ff; font-size: 64px; }
.phone-card small { display: block; margin-top: 20px; color: #8b9bb4; font-size: 10px; }
.split-copy h2 { margin: 14px 0 12px; color: #172d54; font-size: 36px; letter-spacing: -.035em; }
.split-copy p { font-size: 16px; }
.split-copy ul { padding: 0; margin: 25px 0; color: #566b90; font-size: 14px; line-height: 2.5; list-style: none; }

.security-section { display: flex; align-items: center; justify-content: space-between; margin-top: 20px; padding: 52px 46px; border: 1px solid rgba(255,255,255,.9); border-radius: 24px; background: rgba(255,255,255,.62); }
.security-section h2 { margin-bottom: 8px; font-size: 28px; }
.security-list { display: flex; gap: 28px; }
.security-list > div { display: flex; align-items: flex-start; gap: 11px; }
.security-list b { color: #216cff; font-size: 22px; }
.security-list strong, .security-list small { display: block; }
.security-list strong { color: #21375e; font-size: 13px; }
.security-list small { margin-top: 5px; color: #8796ad; font-size: 11px; }

.site-footer { position: relative; display: flex; justify-content: space-between; padding: 29px 0; color: #9aa8bd; font-size: 12px; }
.site-footer a { position: absolute; left: 50%; color: inherit; text-decoration: none; transform: translateX(-50%); }
.site-footer a:hover { color: #216cff; }

/* 客服保持静止吸边，仅在点击时展开，不使用持续漂浮动画。 */
.customer-float { position: fixed; right: 24px; bottom: 24px; z-index: 20; }
.customer-button { display: inline-flex; align-items: center; gap: 9px; height: 50px; padding: 0 15px 0 9px; border: 1px solid rgba(255,255,255,.5); border-radius: 999px; background: #1f6df4; color: #fff; box-shadow: 0 12px 28px rgba(29,102,229,.24); cursor: pointer; transition: transform .2s ease, background .2s ease, box-shadow .2s ease; }
.customer-button:hover { transform: translateY(-2px); background: #175bd5; box-shadow: 0 16px 32px rgba(29,102,229,.3); }
.customer-button-icon { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; background: rgba(255,255,255,.2); font-size: 16px; }
.customer-button b { font-size: 14px; font-weight: 650; }
.customer-button-arrow { margin-left: 2px; color: rgba(255,255,255,.78); font-size: 15px; }
.customer-card { position: absolute; right: 0; bottom: 62px; width: 300px; padding: 17px; border: 1px solid rgba(255,255,255,.88); border-radius: 18px; background: rgba(255,255,255,.95); box-shadow: 0 20px 55px rgba(40,65,105,.2); opacity: 0; pointer-events: none; transform: translateY(7px) scale(.98); transform-origin: bottom right; transition: opacity .18s ease, transform .18s ease; }
.customer-float.is-open .customer-card { opacity: 1; pointer-events: auto; transform: translateY(0) scale(1); }
.customer-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.customer-head strong { display: block; color: #172033; font-size: 17px; }
.customer-head span { display: block; margin-top: 3px; color: #8a94a6; font-size: 12px; }
.customer-head button { width: 28px; height: 28px; border: 0; border-radius: 8px; background: #f0f4fa; color: #64748b; font-size: 18px; line-height: 24px; cursor: pointer; }
.customer-list { display: grid; gap: 9px; }
.customer-item { display: flex; align-items: flex-start; gap: 10px; padding: 10px; border: 1px solid #edf2f8; border-radius: 12px; background: #f8fafd; }
.customer-item > span { flex: 0 0 62px; color: #8a94a6; font-size: 12px; }
.customer-item b, .customer-item a { color: #1f2937; font-size: 14px; font-weight: 650; word-break: break-all; text-decoration: none; }
.customer-item a { color: #1677ff; }
.customer-item img { width: 112px; height: 112px; object-fit: contain; border-radius: 9px; background: #fff; }

@media (max-width: 850px) {
  .nav-links { display: none; }
  .hero, .split-section { grid-template-columns: 1fr; gap: 34px; padding-top: 55px; }
  .hero-copy h1 { font-size: 48px; }
  .hero-visual { order: -1; min-height: 320px; }
  .dashboard-card { transform: none; }
  .feature-grid { grid-template-columns: 1fr; }
  .security-section { display: block; margin: 20px 24px 0; padding: 42px 28px; }
  .security-list { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 24px; }
}

@media (max-width: 520px) {
  .site-nav, .section-wrap, .site-footer { width: calc(100% - 36px); }
  .brand { font-size: 17px; }
  .login-link { display: none; }
  .hero, .content-section, .split-section { padding-left: 0; padding-right: 0; }
  .hero-copy h1 { font-size: 41px; }
  .hero-copy p { font-size: 15px; }
  .trust-list { display: block; line-height: 2; }
  .trust-list span { display: block; }
  .security-list { grid-template-columns: 1fr; }
  .customer-float { right: 16px; bottom: 16px; }
  .customer-card { width: min(300px, calc(100vw - 32px)); }
  .site-footer { padding: 24px 0; }
  .site-footer a { position: static; transform: none; }
}