:root {
  --primary: #1677ff;
  --primary-d: #0b5ed7;
  --accent: #22d3ee;
  --grad: linear-gradient(120deg, #22d3ee 0%, #6366f1 100%);
  --ink: #0f1b2d;
  --ink-2: #40506b;
  --ink-3: #7b8aa3;
  --line: #e7ecf3;
  --bg: #ffffff;
  --bg-tint: #f5f8fd;
  --dark: #0b1220;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 10px 30px rgba(16, 42, 84, 0.08);
  --shadow-lg: 0 24px 60px rgba(16, 42, 84, 0.14);
  --maxw: 1160px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3 { margin: 0 0 .4em; line-height: 1.25; letter-spacing: -.01em; }
p { margin: 0 0 1em; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.container--narrow { max-width: 820px; }

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 1px solid transparent; border-radius: 999px; cursor: pointer;
  font-size: 15px; font-weight: 600; padding: 11px 22px; transition: .2s;
  white-space: nowrap;
}
.btn--primary { background: var(--primary); color: #fff; box-shadow: 0 8px 20px rgba(22,119,255,.3); }
.btn--primary:hover { background: var(--primary-d); transform: translateY(-1px); }
.btn--ghost { background: rgba(22,119,255,.08); color: var(--primary); border-color: rgba(22,119,255,.18); }
.btn--ghost:hover { background: rgba(22,119,255,.14); }
.btn--outline { border-color: var(--primary); color: var(--primary); background: #fff; }
.btn--outline:hover { background: rgba(22,119,255,.06); }
.btn--lg { padding: 14px 30px; font-size: 16px; }
.btn--sm { padding: 8px 16px; font-size: 14px; }
.btn--block { width: 100%; }

/* 导航 */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.86); backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid transparent; transition: .2s;
}
.nav.is-scrolled { border-bottom-color: var(--line); box-shadow: 0 6px 20px rgba(16,42,84,.06); }
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; }
.brand__logo { width: 34px; height: 34px; }
.brand__name { font-size: 18px; letter-spacing: .2px; }
.brand__name em { font-style: normal; font-size: 12px; color: var(--ink-3); font-weight: 600; margin-left: 4px; }
.nav__menu { display: flex; align-items: center; gap: 26px; font-size: 15px; font-weight: 500; }
.nav__menu a { color: var(--ink-2); transition: .15s; }
.nav__menu a:hover { color: var(--primary); }
.nav__cta { margin-left: 6px; }
.nav__toggle { display: none; width: 42px; height: 42px; border: 0; background: transparent; cursor: pointer; }
.nav__toggle span { display: block; width: 22px; height: 2px; background: var(--ink); margin: 5px auto; border-radius: 2px; transition: .2s; }

/* 首屏 */
.hero { position: relative; overflow: hidden; padding: 72px 0 84px; }
.hero__bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(900px 480px at 12% -10%, rgba(34,211,238,.20), transparent 60%),
    radial-gradient(760px 460px at 92% 0%, rgba(99,102,241,.18), transparent 60%),
    linear-gradient(180deg, #f7fbff 0%, #ffffff 70%);
}
.hero__inner { position: relative; display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.hero__badge { display: inline-block; font-size: 13px; font-weight: 600; color: var(--primary);
  background: rgba(22,119,255,.10); border: 1px solid rgba(22,119,255,.16); border-radius: 999px; padding: 6px 14px; margin-bottom: 18px; }
.hero h1 { font-size: 46px; font-weight: 800; }
.hero h1 b { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero__desc { font-size: 17px; color: var(--ink-2); max-width: 560px; }
.hero__actions { display: flex; gap: 14px; margin: 26px 0 30px; flex-wrap: wrap; }
.hero__stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.hero__stats li { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 12px 14px; }
.hero__stats b { display: block; font-size: 16px; }
.hero__stats span { font-size: 12.5px; color: var(--ink-3); }

/* 首屏模拟界面 */
.hero__visual { position: relative; }
.mock { background: #fff; border: 1px solid var(--line); border-radius: 16px; box-shadow: var(--shadow-lg); overflow: hidden; }
.mock__bar { height: 34px; background: #f2f5fa; display: flex; align-items: center; gap: 6px; padding: 0 14px; border-bottom: 1px solid var(--line); }
.mock__bar span { width: 10px; height: 10px; border-radius: 50%; background: #dbe3ef; }
.mock__bar span:nth-child(1){ background:#ff5f57; } .mock__bar span:nth-child(2){ background:#febc2e; } .mock__bar span:nth-child(3){ background:#28c840; }
.mock__body { display: grid; grid-template-columns: 56px 1fr; min-height: 300px; }
.mock__side { background: #0f1b2d; padding: 16px 0; display: flex; flex-direction: column; align-items: center; gap: 14px; }
.mock__side span { width: 24px; height: 24px; border-radius: 8px; background: rgba(255,255,255,.14); }
.mock__side span.active { background: var(--accent); }
.mock__main { padding: 16px; display: flex; flex-direction: column; gap: 14px; }
.mock__cards { display: grid; grid-template-columns: repeat(3,1fr); gap: 10px; }
.mock__stat { background: var(--bg-tint); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; }
.mock__stat i { display: block; width: 18px; height: 18px; border-radius: 6px; background: var(--grad); margin-bottom: 8px; }
.mock__stat b { display: block; font-size: 12px; color: var(--ink-3); font-weight: 600; }
.mock__stat em { font-style: normal; font-size: 20px; font-weight: 800; color: var(--ink); }
.mock__chart { flex: 1; display: flex; align-items: flex-end; gap: 8px; padding: 14px; background: var(--bg-tint); border: 1px solid var(--line); border-radius: 10px; min-height: 120px; }
.mock__chart span { flex: 1; background: var(--grad); border-radius: 6px 6px 0 0; opacity: .85; }
.mock__rows { display: flex; flex-direction: column; gap: 8px; }
.mock__rows span { height: 12px; border-radius: 6px; background: var(--bg-tint); border: 1px solid var(--line); }
.mock__rows span:nth-child(2){ width: 80%; } .mock__rows span:nth-child(3){ width: 60%; }
.mock__float { position: absolute; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); border-radius: 999px; padding: 8px 14px; font-size: 13px; font-weight: 600; }
.mock__float--a { left: -16px; top: 30%; animation: floaty 4s ease-in-out infinite; }
.mock__float--b { right: -14px; bottom: 22%; animation: floaty 4s ease-in-out infinite .8s; }
@keyframes floaty { 0%,100%{ transform: translateY(0) } 50%{ transform: translateY(-8px) } }

/* 通用区块 */
.section { padding: 76px 0; }
.section--tint { background: var(--bg-tint); }
.section--dark { background: var(--dark); color: #fff; }
.section__head { text-align: center; max-width: 720px; margin: 0 auto 44px; }
.section__head h2 { font-size: 32px; font-weight: 800; }
.section__head p { color: var(--ink-3); font-size: 16px; margin: 0; }
.section__head--light h2 { color: #fff; }
.section__head--light p { color: rgba(255,255,255,.7); }

.grid { display: grid; gap: 20px; }
.grid--feature { grid-template-columns: repeat(4, 1fr); }
.grid--adv { grid-template-columns: repeat(3, 1fr); }
.grid--price { grid-template-columns: repeat(3, 1fr); align-items: stretch; }

/* 对比 */
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.compare__col { border-radius: var(--radius); padding: 26px 26px; border: 1px solid var(--line); background: #fff; }
.compare__col h3 { font-size: 19px; margin-bottom: 14px; }
.compare__col li { position: relative; padding-left: 26px; margin-bottom: 10px; color: var(--ink-2); }
.compare__col--pain li::before { content: "✕"; position: absolute; left: 0; color: #ef5350; font-weight: 700; }
.compare__col--good { background: #f3f9ff; border-color: #cfe3ff; }
.compare__col--good li::before { content: "✓"; position: absolute; left: 0; color: #1677ff; font-weight: 800; }

/* 功能卡片 */
.card { display: grid; grid-template-columns: auto 1fr; align-items: center; column-gap: 12px; row-gap: 8px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; transition: .2s; }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: #cfe3ff; }
.card__ico { display: inline-flex; width: 46px; height: 46px; border-radius: 12px; background: rgba(22,119,255,.10); color: var(--primary); align-items: center; justify-content: center; margin-bottom: 0; }
.card__ico svg { width: 24px; height: 24px; }
.card h3 { font-size: 17px; margin: 0; }
.card p { grid-column: 1 / -1; color: var(--ink-3); font-size: 14px; margin: 0; }

/* 终端 tabs */
.tabs__nav { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 26px; }
.tabs__btn { border: 1px solid var(--line); background: #fff; color: var(--ink-2); border-radius: 999px; padding: 9px 18px; font-size: 14.5px; font-weight: 600; cursor: pointer; transition: .15s; }
.tabs__btn:hover { border-color: #cfe3ff; }
.tabs__btn.is-active { background: var(--primary); color: #fff; border-color: var(--primary); }
.tabs__panel { display: none; }
.tabs__panel.is-active { display: block; animation: fade .3s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(6px) } to { opacity: 1; transform: none } }
.terminal { display: grid; grid-template-columns: 72px 1fr; gap: 22px; align-items: start; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); }
.terminal__ico { width: 72px; height: 72px; border-radius: 18px; background: var(--grad); color: #fff; display: flex; align-items: center; justify-content: center; }
.terminal__ico svg { width: 36px; height: 36px; }
.terminal h3 { font-size: 20px; }
.terminal p { color: var(--ink-2); }
.terminal ul { display: flex; flex-wrap: wrap; gap: 10px; }
.terminal ul li { background: var(--bg-tint); border: 1px solid var(--line); border-radius: 999px; padding: 6px 14px; font-size: 13.5px; color: var(--ink-2); }

/* 优势（深色） */
.adv { background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.10); border-radius: var(--radius); padding: 26px 24px; }
.adv svg { width: 34px; height: 34px; color: var(--accent); margin-bottom: 12px; }
.adv h3 { color: #fff; font-size: 17px; }
.adv p { color: rgba(255,255,255,.66); font-size: 14px; margin: 0; }

/* 价格 */
.price { position: relative; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 26px; display: flex; flex-direction: column; }
.price--hot { border-color: var(--primary); box-shadow: var(--shadow-lg); transform: translateY(-6px); }
.price__tag { position: absolute; top: 18px; right: 18px; background: var(--primary); color: #fff; font-size: 12px; font-weight: 700; border-radius: 999px; padding: 3px 10px; }
.price h3 { font-size: 22px; }
.price__desc { color: var(--ink-3); font-size: 14px; }
.price__price { font-size: 26px; font-weight: 800; color: var(--ink); margin: 2px 0 12px; }
.price ul { margin: 14px 0 22px; flex: 1; }
.price li { position: relative; padding-left: 26px; margin-bottom: 10px; color: var(--ink-2); font-size: 14.5px; }
.price li::before { content: "✓"; position: absolute; left: 0; color: var(--primary); font-weight: 800; }
.pricing__note { text-align: center; color: var(--ink-3); font-size: 13px; margin-top: 22px; }

/* 场景 chips */
.chips { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.chips span { background: #fff; border: 1px solid var(--line); border-radius: 999px; padding: 10px 20px; font-size: 15px; color: var(--ink-2); }

/* 指标 / logos */
.metrics { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; }
.metric { text-align: center; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 16px; }
.metric b { display: block; font-size: 26px; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.metric span { color: var(--ink-3); font-size: 13.5px; }
.logos { display: flex; align-items: center; justify-content: center; gap: 18px; margin-top: 34px; flex-wrap: wrap; color: var(--ink-3); }
.logos i { width: 110px; height: 34px; border-radius: 8px; background: var(--bg-tint); border: 1px dashed #d5deea; }

/* FAQ */
.faq details { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-sm); margin-bottom: 12px; overflow: hidden; }
.faq summary { cursor: pointer; list-style: none; padding: 16px 20px; font-weight: 600; display: flex; justify-content: space-between; align-items: center; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 22px; color: var(--primary); font-weight: 400; }
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 0; padding: 0 20px 18px; color: var(--ink-2); }

/* 联系 */
.section--contact { background: linear-gradient(180deg, #ffffff 0%, #f5f8fd 100%); }
.contact { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.contact__copy h2 { font-size: 30px; }
.contact__copy > p { color: var(--ink-2); }
.contact__list { margin: 20px 0; }
.contact__list li { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; color: var(--ink-2); }
.contact__list svg { width: 20px; height: 20px; color: var(--primary); }
.contact__list b { color: var(--ink); }
.contact__qr img { width: 132px; height: 132px; border: 1px solid var(--line); border-radius: 12px; background: #fff; padding: 8px; }
.form { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); }
.form__row { margin-bottom: 14px; }
.form label { display: block; font-size: 13.5px; color: var(--ink-2); font-weight: 600; }
.form input, .form textarea {
  width: 100%; margin-top: 6px; padding: 11px 14px; border: 1px solid var(--line); border-radius: 10px;
  font-size: 15px; font-family: inherit; color: var(--ink); background: #fbfcfe; transition: .15s;
}
.form input:focus, .form textarea:focus { outline: none; border-color: var(--primary); background: #fff; box-shadow: 0 0 0 3px rgba(22,119,255,.12); }
.captcha { display: flex; gap: 10px; margin-top: 6px; }
.captcha input { flex: 1; margin-top: 0; }
.captcha img { width: 120px; height: 44px; border: 1px solid var(--line); border-radius: 10px; cursor: pointer; background: #eef4ff; flex-shrink: 0; }
.form__tip { margin: 12px 0 0; font-size: 13.5px; text-align: center; }
.form__tip.is-ok { color: #16a34a; }
.form__tip.is-err { color: #dc2626; }

/* 页脚 */
.footer { background: var(--dark); color: rgba(255,255,255,.72); padding: 46px 0 32px; }
.footer__inner { display: grid; gap: 22px; }
.footer__brand { display: flex; align-items: center; gap: 14px; }
.footer__brand img { width: 40px; height: 40px; }
.footer__brand b { color: #fff; font-size: 17px; }
.footer__brand p { margin: 2px 0 0; font-size: 13.5px; }
.footer__links { display: flex; flex-wrap: wrap; gap: 20px; font-size: 14px; }
.footer__links a:hover { color: #fff; }
.footer__meta { border-top: 1px solid rgba(255,255,255,.12); padding-top: 18px; font-size: 12.5px; color: rgba(255,255,255,.5); }
.footer__meta p { margin: 4px 0; }

/* 移动端底部栏 */
.mobile-bar { display: none; position: fixed; left: 0; right: 0; bottom: 0; z-index: 120;
  background: #fff; border-top: 1px solid var(--line); padding: 8px 12px calc(8px + env(safe-area-inset-bottom));
  grid-template-columns: 1fr 1.4fr; gap: 10px; box-shadow: 0 -6px 20px rgba(16,42,84,.08); }
.mobile-bar a { display: flex; align-items: center; justify-content: center; gap: 6px; border-radius: 999px; padding: 11px; font-weight: 700; font-size: 15px; }
.mobile-bar__tel { background: rgba(22,119,255,.08); color: var(--primary); }
.mobile-bar__tel svg { width: 18px; height: 18px; }
.mobile-bar__cta { background: var(--primary); color: #fff; }

/* 全业务链闭环 */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin: 0; }
.flow li { position: relative; display: grid; grid-template-columns: auto 1fr; align-items: center; column-gap: 10px; row-gap: 4px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; transition: .2s; }
.flow li:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: #cfe3ff; }
.flow li i { display: inline-flex; width: 32px; height: 32px; border-radius: 9px; background: var(--grad); color: #fff; font-style: normal; font-weight: 800; align-items: center; justify-content: center; margin-bottom: 0; }
.flow li b { display: block; font-size: 16px; }
.flow li span { grid-column: 1 / -1; color: var(--ink-3); font-size: 13px; }
.flow__note { text-align: center; color: var(--ink-3); font-size: 13.5px; margin: 26px 0 0; }
@media (min-width: 861px) {
  .flow li:not(:nth-child(4n))::after { content: "→"; position: absolute; right: -12px; top: calc(50% - 12px); color: #c3d3e8; font-weight: 800; z-index: 2; }
}

/* 安全与合规 */
.section--security { background: linear-gradient(140deg, #0a1830 0%, #123055 55%, #0a1830 100%); }
.sec-badges { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin: 30px 0 0; }
.sec-badges li { border: 1px solid rgba(255,255,255,.22); background: rgba(255,255,255,.06); color: rgba(255,255,255,.86); border-radius: 999px; padding: 8px 18px; font-size: 13.5px; }

/* OA 审批（浅色卡片复用） */
.adv--light { background: #fff; border-color: var(--line); }
.adv--light svg { color: var(--primary); }
.adv--light h3 { color: var(--ink); }
.adv--light p { color: var(--ink-3); }
.adv--light:hover { box-shadow: var(--shadow); transform: translateY(-3px); border-color: #cfe3ff; }

/* 滚动进入动画 */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* 响应式 */
@media (max-width: 1024px) {
  .hero h1 { font-size: 38px; }
  .grid--feature { grid-template-columns: repeat(2, 1fr); }
  .grid--adv { grid-template-columns: repeat(2, 1fr); }
  .hero__inner { grid-template-columns: 1fr; gap: 40px; }
  .hero__visual { max-width: 560px; }
}
@media (max-width: 860px) {
  .nav__menu {
    position: fixed; inset: 66px 0 auto 0; flex-direction: column; align-items: stretch; gap: 0;
    background: #fff; border-bottom: 1px solid var(--line); padding: 8px 20px 16px;
    transform: translateY(-12px); opacity: 0; pointer-events: none; transition: .2s;
  }
  .nav__menu.is-open { transform: none; opacity: 1; pointer-events: auto; }
  .nav__menu a { padding: 14px 4px; border-bottom: 1px solid var(--line); color: var(--ink); }
  .nav__menu a:last-child { border-bottom: 0; }
  .nav__cta { margin: 12px 0 0; border-bottom: 0 !important; }
  .nav__toggle { display: block; }
  .section { padding: 58px 0; }
  .section__head h2 { font-size: 26px; }
  .grid--price { grid-template-columns: 1fr; }
  .price--hot { transform: none; }
  .compare { grid-template-columns: 1fr; }
  .contact { grid-template-columns: 1fr; gap: 26px; }
  .metrics { grid-template-columns: repeat(2, 1fr); }
  .mobile-bar { display: grid; }
  body { padding-bottom: 68px; }
}
@media (max-width: 560px) {
  .hero { padding: 46px 0 60px; }
  .hero h1 { font-size: 30px; }
  .hero__desc { font-size: 15.5px; }
  .hero__stats { grid-template-columns: repeat(2, 1fr); }
  .grid--feature { grid-template-columns: 1fr; }
  .grid--adv { grid-template-columns: 1fr; }
  .metrics { grid-template-columns: 1fr 1fr; }
  .terminal { grid-template-columns: 1fr; }
  .hero__actions .btn { flex: 1; }
  .brand__name em { display: none; }
  .footer__links { gap: 14px; }
}

/* 业务闭环响应式 */
@media (max-width: 860px) and (min-width: 561px) {
  .flow { grid-template-columns: repeat(2, 1fr); }
  .flow li:not(:nth-child(2n))::after { content: "→"; position: absolute; right: -12px; top: calc(50% - 12px); color: #c3d3e8; font-weight: 800; z-index: 2; }
}
@media (max-width: 560px) {
  /* 手机端：业务闭环一行两列显示 */
  .flow { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .flow li { padding: 16px 14px; }
  .flow li b { font-size: 15px; }
  .flow li span { font-size: 12px; }
  .flow li i { width: 28px; height: 28px; border-radius: 8px; }
}