:root {
  --bg: #f5f5f7;
  --surface: #ffffff;
  --ink: #1d1d1f;
  --ink-2: #424245;
  --muted: #6e6e73;
  --blue: #0071e3;
  --blue-hover: #0077ed;
  --line: rgba(0, 0, 0, .08);
  --radius: 18px;
  --shadow: 0 1px 2px rgba(0, 0, 0, .04), 0 12px 32px rgba(0, 0, 0, .08);
  --container: 1120px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 64px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

img, svg {
  display: block;
  max-width: 100%;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 导航 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  height: 48px;
  background: rgba(251, 251, 253, .82);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s ease, box-shadow .25s ease;
}

.nav.is-scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 1px 0 rgba(0, 0, 0, .02);
}

.nav__inner {
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  letter-spacing: -.01em;
}

.brand__mark {
  width: 24px;
  height: 24px;
  border-radius: 6px;
}

.brand__name {
  font-size: 16px;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 12.5px;
  color: rgba(29, 29, 31, .8);
}

.nav__links a {
  transition: color .2s ease;
}

.nav__links a:hover {
  color: var(--ink);
}

.nav__cta {
  padding: 5px 14px;
  border-radius: 980px;
  background: var(--ink);
  color: #fff !important;
  font-weight: 500;
}

.nav__cta:hover {
  background: #000;
}

.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 8px;
  background: none;
  border: 0;
  cursor: pointer;
}

.nav__toggle span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform .25s ease;
}

.nav--open .nav__toggle span:first-child {
  transform: translateY(3.25px) rotate(45deg);
}

.nav--open .nav__toggle span:last-child {
  transform: translateY(-3.25px) rotate(-45deg);
}

/* ---------- 主视觉 ---------- */
.hero {
  padding: 72px 0 20px;
  background: var(--surface);
}

.hero__text {
  text-align: center;
  max-width: 820px;
}

.eyebrow {
  font-size: 15px;
  font-weight: 600;
  color: var(--blue);
  letter-spacing: .02em;
  margin-bottom: 16px;
}

.hero h1 {
  font-size: clamp(40px, 6vw, 68px);
  font-weight: 700;
  letter-spacing: -.025em;
  line-height: 1.08;
  margin-bottom: 22px;
}

.hero__sub {
  font-size: clamp(17px, 2.2vw, 21px);
  color: var(--ink-2);
  max-width: 640px;
  margin: 0 auto 30px;
}

.hero__actions {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 22px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 24px;
  border-radius: 980px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: transform .2s ease, background .2s ease, color .2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  background: var(--blue);
  color: #fff;
}

.btn--primary:hover {
  background: var(--blue-hover);
}

.btn--link {
  color: var(--blue);
  padding: 11px 4px;
}

.btn--link:hover {
  text-decoration: underline;
}

.btn--light {
  background: #fff;
  color: var(--ink);
}

.btn--light:hover {
  background: #f2f2f4;
}

.btn--ghost {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, .35);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, .12);
}

.hero__visual {
  position: relative;
  margin-top: 48px;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.hero__net {
  width: 100%;
  height: clamp(260px, 42vw, 460px);
}

.hero__flow {
  fill: none;
  stroke: #4f9bff;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 5 7;
  animation: dash 22s linear infinite;
  opacity: .8;
}

@keyframes dash {
  to { stroke-dashoffset: -240; }
}

.hero__visual-label {
  position: absolute;
  left: 24px;
  bottom: 20px;
  font-size: 11px;
  letter-spacing: .22em;
  color: rgba(255, 255, 255, .55);
}

/* ---------- 数据 ---------- */
.stats {
  padding: 40px 0 0;
  background: var(--surface);
}

.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  background: var(--bg);
  border-radius: 20px;
  padding: 8px;
}

.stat {
  background: var(--surface);
  border-radius: 14px;
  padding: 28px 20px;
  text-align: center;
}

.stat__num {
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 700;
  letter-spacing: -.02em;
}

.stat__suffix {
  font-size: .55em;
  font-weight: 600;
  color: var(--blue);
  margin-left: 2px;
}

.stat__label {
  margin-top: 6px;
  font-size: 14px;
  color: var(--muted);
}

/* ---------- 通用 section ---------- */
.section {
  padding: 104px 0;
  background: var(--surface);
}

.section--alt {
  background: var(--bg);
}

.section__title {
  font-size: clamp(30px, 4.4vw, 48px);
  font-weight: 700;
  letter-spacing: -.02em;
  margin-bottom: 48px;
}

.section__desc {
  font-size: 17px;
  color: var(--muted);
  max-width: 680px;
  margin: -28px 0 40px;
}

/* ---------- 业务 tiles ---------- */
.tiles {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.tile {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 28px;
  padding: 36px 36px 28px;
  border-radius: var(--radius);
  background: var(--bg);
  transition: transform .25s ease, box-shadow .25s ease;
}

.tile:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.tile--dark {
  background: linear-gradient(145deg, #15171d, #0b0d14);
  color: #f5f5f7;
}

.tile__icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: rgba(0, 0, 0, .05);
  color: var(--blue);
}

.tile--dark .tile__icon {
  background: rgba(255, 255, 255, .1);
  color: #7db8ff;
}

.tile__icon svg {
  width: 26px;
  height: 26px;
}

.tile h3 {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -.01em;
  margin-bottom: 10px;
}

.tile p {
  font-size: 15px;
  color: var(--muted);
  max-width: 420px;
}

.tile--dark p {
  color: rgba(245, 245, 247, .72);
}

.tile__more {
  font-size: 14px;
  color: var(--blue);
}

.tile--dark .tile__more {
  color: #7db8ff;
}

/* ---------- 行业 ---------- */
.industries {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.industry {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform .25s ease, box-shadow .25s ease;
}

.industry--featured {
  background: linear-gradient(180deg, rgba(0, 113, 227, .055), #fff 58%);
  border: 1px solid rgba(0, 113, 227, .16);
}

.industry:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.industry__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.industry__num {
  font-size: 13px;
  font-weight: 600;
  color: var(--blue);
  letter-spacing: .08em;
}

.industry__badge {
  font-size: 11px;
  font-weight: 600;
  color: var(--blue);
  background: rgba(0, 113, 227, .08);
  padding: 3px 9px;
  border-radius: 980px;
  white-space: nowrap;
}

.industry h3 {
  font-size: 20px;
  font-weight: 600;
  margin: 12px 0 8px;
}

.industry p {
  font-size: 14px;
  color: var(--muted);
  min-height: 60px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.chips span {
  font-size: 12px;
  color: var(--ink-2);
  background: var(--bg);
  padding: 4px 10px;
  border-radius: 980px;
}

/* ---------- 平台 ---------- */
.platform {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.platform__copy .section__title {
  margin-bottom: 18px;
}

.platform__desc {
  font-size: 17px;
  color: var(--ink-2);
  margin-bottom: 28px;
}

.platform__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 32px;
}

.platform__list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: var(--ink-2);
}

.platform__list svg {
  width: 18px;
  height: 18px;
  color: var(--blue);
  flex-shrink: 0;
}

/* 浏览器 mock */
.mock {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, .12);
  overflow: hidden;
}

.mock__bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 11px 14px;
  background: #f7f7f8;
  border-bottom: 1px solid var(--line);
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot--r { background: #ff5f57; }
.dot--y { background: #febc2e; }
.dot--g { background: #28c840; }

.mock__url {
  margin-left: 8px;
  font-size: 11px;
  color: var(--muted);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 3px 10px;
}

.mock__body {
  display: flex;
  min-height: 360px;
}

.mock__side {
  width: 132px;
  background: #fbfbfd;
  border-right: 1px solid var(--line);
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.mock__logo {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: var(--blue);
  margin-bottom: 6px;
}

.mock__menu {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.mock__menu span {
  height: 8px;
  border-radius: 4px;
  background: #e4e4e8;
}

.mock__menu span.on {
  background: #c9dbf5;
}

.mock__menu span:nth-child(2) { width: 80%; }
.mock__menu span:nth-child(3) { width: 66%; }
.mock__menu span:nth-child(4) { width: 72%; }

.mock__main {
  flex: 1;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.mock__cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.mock__card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px;
}

.mock__card span {
  display: block;
  font-size: 11px;
  color: var(--muted);
}

.mock__card strong {
  display: block;
  font-size: 17px;
  font-weight: 600;
  margin: 6px 0 2px;
}

.mock__card em {
  font-style: normal;
  font-size: 11px;
  color: #28a745;
}

.mock__card:nth-child(3) em {
  color: #dc3545;
}

.mock__panel {
  flex: 1;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px;
}

.mock__panel-head {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--ink-2);
  margin-bottom: 14px;
}

.mock__legend {
  width: 54px;
  height: 8px;
  border-radius: 4px;
  background: linear-gradient(90deg, #c9dbf5, #4f9bff);
}

.mock__chart {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  height: 130px;
}

.mock__chart i {
  flex: 1;
  border-radius: 4px 4px 0 0;
  background: linear-gradient(180deg, #7db8ff, #dbe9ff);
}

/* ---------- 优势 ---------- */
.values {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.value {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 30px 24px;
}

.value__icon {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: var(--bg);
  color: var(--blue);
  margin-bottom: 18px;
}

.value__icon svg {
  width: 24px;
  height: 24px;
}

.value h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.value p {
  font-size: 14px;
  color: var(--muted);
}

/* ---------- CTA ---------- */
.cta {
  background: var(--surface);
  padding: 0 0 104px;
}

.cta__inner {
  text-align: center;
  background: linear-gradient(150deg, #10131b, #0c1220);
  color: #fff;
  border-radius: 28px;
  padding: 84px 32px;
}

.cta__inner h2 {
  font-size: clamp(30px, 4.4vw, 46px);
  font-weight: 700;
  letter-spacing: -.02em;
  margin-bottom: 14px;
}

.cta__inner p {
  font-size: 18px;
  color: rgba(255, 255, 255, .78);
  margin-bottom: 34px;
}

.cta__inner .cta__contact {
  margin: -18px 0 30px;
  font-size: 16px;
  color: rgba(255, 255, 255, .9);
}

.cta__contact a {
  color: #7db8ff;
}

.cta__actions {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--bg);
  border-top: 1px solid var(--line);
  padding: 44px 0 28px;
  font-size: 12.5px;
  color: var(--muted);
}

.footer__cols {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 36px;
}

.footer__col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__col h4 {
  font-size: 13px;
  color: var(--ink);
  margin-bottom: 4px;
}

.footer__col a:hover {
  color: var(--ink);
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.footer__bottom a {
  color: var(--ink-2);
}

/* ---------- 动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s cubic-bezier(.22, .61, .36, 1), transform .7s cubic-bezier(.22, .61, .36, 1);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  [data-reveal] { opacity: 1; transform: none; transition: none; }
  .hero__flow { animation: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .tiles { grid-template-columns: 1fr; }
  .industries { grid-template-columns: repeat(2, 1fr); }
  .values { grid-template-columns: repeat(2, 1fr); }
  .platform { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 760px) {
  .nav__links {
    position: absolute;
    top: 48px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(251, 251, 253, .98);
    border-bottom: 1px solid var(--line);
    padding: 8px 24px 16px;
    display: none;
  }

  .nav--open .nav__links {
    display: flex;
  }

  .nav__links a {
    padding: 12px 0;
    font-size: 16px;
    border-bottom: 1px solid var(--line);
  }

  .nav__links a:last-child {
    border-bottom: 0;
    text-align: center;
    margin-top: 8px;
  }

  .nav__cta {
    background: var(--ink);
  }

  .nav__toggle {
    display: flex;
  }

  .stats__grid { grid-template-columns: repeat(2, 1fr); }
  .industries { grid-template-columns: 1fr; }
  .values { grid-template-columns: 1fr; }
  .footer__cols { grid-template-columns: repeat(2, 1fr); }
  .mock__body { flex-direction: column; }
  .mock__side { width: 100%; flex-direction: row; align-items: center; border-right: 0; border-bottom: 1px solid var(--line); }
  .mock__menu { flex-direction: row; }
  .mock__cards { grid-template-columns: 1fr; }
}