:root {
  --blue: #1f6fff;
  --blue-deep: #0b3d91;
  --blue-soft: #e8f1ff;
  --orange: #ff6a2a;
  --orange-deep: #e24d10;
  --ink: #142033;
  --muted: #5b6b82;
  --line: #e6edf7;
  --bg: #f5f8fc;
  --white: #ffffff;
  --ok: #0f9f6e;
  --bad: #c2410c;
  --shadow: 0 18px 50px rgba(20, 48, 100, 0.12);
  --radius: 18px;
  --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --display: "Outfit", "Noto Sans SC", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--white);
  line-height: 1.65;
}

img {
  max-width: 100%;
}

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

button,
input,
textarea {
  font: inherit;
}

.container {
  width: min(1160px, calc(100% - 40px));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(31, 111, 255, 0.08);
}

.header-inner {
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
  min-height: 72px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  flex-shrink: 0;
}

.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, var(--blue), #4aa3ff);
  box-shadow: 0 8px 18px rgba(31, 111, 255, 0.28);
}

.logo-text {
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}

.nav {
  display: flex;
  gap: 22px;
  margin-left: auto;
  color: var(--muted);
  font-size: 0.95rem;
}

.nav a:hover {
  color: var(--blue);
}

.header-actions {
  display: flex;
  gap: 10px;
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  margin-left: auto;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  cursor: pointer;
}

.menu-toggle span {
  width: 18px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
}

.mobile-nav {
  display: none;
  position: sticky;
  top: 72px;
  z-index: 99;
  background: #fff;
  border-bottom: 1px solid var(--line);
  padding: 16px 20px 20px;
  flex-direction: column;
  gap: 14px;
}

.mobile-nav:not([hidden]) {
  display: flex;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid transparent;
  padding: 0.7rem 1.25rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

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

.btn-sm {
  padding: 0.45rem 0.95rem;
  font-size: 0.9rem;
}

.btn-lg {
  padding: 0.9rem 1.55rem;
  font-size: 1rem;
}

.btn-block {
  width: 100%;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--orange), var(--orange-deep));
  box-shadow: 0 10px 24px rgba(255, 106, 42, 0.28);
}

.btn-outline {
  border-color: rgba(31, 111, 255, 0.25);
  color: var(--blue);
  background: #fff;
}

.btn-light {
  background: rgba(255, 255, 255, 0.9);
  color: var(--blue-deep);
  border-color: rgba(255, 255, 255, 0.6);
}

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  color: #fff;
  padding: 72px 0 88px;
  background:
    radial-gradient(circle at 18% 20%, rgba(74, 163, 255, 0.35), transparent 35%),
    radial-gradient(circle at 85% 15%, rgba(255, 106, 42, 0.25), transparent 30%),
    linear-gradient(135deg, #0a2f74 0%, #1f6fff 48%, #0d4bb8 100%);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, #000 30%, transparent 95%);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 40px;
  align-items: center;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 14px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  font-size: 0.88rem;
  letter-spacing: 0.04em;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.2;
  font-weight: 900;
  letter-spacing: 0.01em;
}

.hero-desc {
  margin: 18px 0 28px;
  max-width: 34rem;
  color: rgba(255, 255, 255, 0.88);
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-stats {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.hero-stats li {
  padding: 14px 12px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.hero-stats strong {
  display: block;
  font-size: 1rem;
}

.hero-stats span {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.85rem;
}

.hero-panel {
  position: relative;
  min-height: 420px;
  display: grid;
  place-items: center;
}

.phone-stack {
  position: relative;
  width: 280px;
  height: 420px;
}

.phone {
  position: absolute;
  width: 220px;
  height: 420px;
  border-radius: 28px;
  padding: 12px;
  background: linear-gradient(180deg, #1a1f2c, #0d121c);
  box-shadow: var(--shadow);
}

.phone-back {
  left: 0;
  top: 24px;
  transform: rotate(-8deg);
  opacity: 0.88;
}

.phone-front {
  right: 0;
  top: 0;
  transform: rotate(4deg);
  animation: floatY 4.5s ease-in-out infinite;
}

.phone-screen {
  height: 100%;
  border-radius: 20px;
  background: #f7faff;
  padding: 16px;
  color: var(--ink);
}

.mock-brand {
  margin: 0;
  color: var(--blue);
  font-weight: 900;
}

.mock-title {
  margin: 4px 0 14px;
  font-weight: 800;
  font-size: 1.05rem;
}

.mock-bar {
  height: 10px;
  width: 40%;
  border-radius: 99px;
  background: #d9e6ff;
  margin-bottom: 14px;
}

.mock-banner {
  height: 84px;
  border-radius: 14px;
  margin-bottom: 14px;
}

.mock-banner.orange {
  background: linear-gradient(135deg, #ffb387, #ff6a2a);
}

.mock-banner.blue {
  background: linear-gradient(135deg, #8ec5ff, #1f6fff);
}

.mock-row {
  height: 10px;
  border-radius: 99px;
  background: #dce7f8;
  margin-bottom: 8px;
}

.mock-row.short {
  width: 60%;
}

.mock-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 14px;
}

.mock-cards span {
  height: 54px;
  border-radius: 12px;
  background: #eaf1ff;
}

.mock-list {
  display: grid;
  gap: 10px;
}

.mock-item {
  display: grid;
  grid-template-columns: 28px 1fr auto;
  align-items: center;
  gap: 8px;
  padding: 10px;
  border-radius: 12px;
  background: #fff;
  border: 1px solid #e7eefc;
}

.mock-item i {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, #ff8b4d, #ff6a2a);
}

.mock-item b {
  font-size: 0.9rem;
}

.mock-item em {
  font-style: normal;
  font-size: 0.75rem;
  color: var(--orange);
  font-weight: 700;
}

.float-chip {
  position: absolute;
  padding: 10px 14px;
  border-radius: 999px;
  background: #fff;
  color: var(--ink);
  font-weight: 700;
  font-size: 0.85rem;
  box-shadow: var(--shadow);
  animation: floatY 3.8s ease-in-out infinite;
}

.chip-a {
  top: 36px;
  left: 8px;
  animation-delay: 0.2s;
}

.chip-b {
  right: 0;
  top: 160px;
  animation-delay: 0.8s;
}

.chip-c {
  left: 24px;
  bottom: 48px;
  animation-delay: 1.2s;
}

@keyframes floatY {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

.phone-front {
  animation-name: floatPhone;
}

@keyframes floatPhone {
  0%,
  100% {
    transform: rotate(4deg) translateY(0);
  }
  50% {
    transform: rotate(4deg) translateY(-10px);
  }
}

/* Sections common */
.section-head {
  margin-bottom: 36px;
}

.section-head.center {
  text-align: center;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 36px;
}

.section-en {
  margin: 0 0 8px;
  color: var(--blue);
  font-family: var(--display);
  font-weight: 800;
  letter-spacing: 0.12em;
  font-size: 0.85rem;
}

.section-head h2 {
  margin: 0 0 12px;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.3;
}

.section-head p {
  margin: 0;
  color: var(--muted);
}

/* Scenes */
.scene-strip {
  padding: 80px 0 70px;
  background: var(--bg);
}

.scene-tabs {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 22px;
}

.scene-tab,
.cap-tab {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
  border-radius: 999px;
  padding: 0.65rem 1.2rem;
  font-weight: 700;
  cursor: pointer;
}

.scene-tab.active,
.cap-tab.active {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(135deg, var(--blue), #4aa3ff);
  box-shadow: 0 10px 20px rgba(31, 111, 255, 0.22);
}

.scene-panel {
  display: none;
}

.scene-panel.active {
  display: block;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  padding: 28px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 10px 30px rgba(20, 48, 100, 0.05);
}

.tag-cloud span {
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--blue-soft);
  color: var(--blue-deep);
  font-weight: 700;
  font-size: 0.92rem;
}

/* Platform */
.platform {
  padding: 80px 0;
}

.cap-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 24px;
}

.cap-panel {
  display: none;
  animation: fadeUp 0.35s ease;
}

.cap-panel.active {
  display: block;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.cap-grid {
  list-style: none;
  margin: 0;
  padding: 28px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  border-radius: var(--radius);
  background: linear-gradient(180deg, #f8fbff, #ffffff);
  border: 1px solid var(--line);
}

.cap-grid li {
  padding: 18px 16px;
  border-radius: 14px;
  background: #fff;
  border: 1px solid var(--line);
  font-weight: 700;
  text-align: center;
}

.cap-grid.check li {
  text-align: left;
  position: relative;
  padding-left: 36px;
}

.cap-grid.check li::before {
  content: "✓";
  position: absolute;
  left: 14px;
  top: 18px;
  color: var(--ok);
  font-weight: 900;
}

/* Feature band */
.feature-band {
  padding: 20px 0 80px;
}

.feature-band-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.feature-band article {
  padding: 24px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 8px 24px rgba(20, 48, 100, 0.04);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

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

.feature-band h3 {
  margin: 0 0 8px;
  color: var(--blue-deep);
}

.feature-band p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* Why */
.why {
  padding: 80px 0;
  background:
    radial-gradient(circle at top right, rgba(31, 111, 255, 0.08), transparent 40%),
    var(--bg);
}

.compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.compare-col {
  border-radius: var(--radius);
  padding: 28px;
  background: #fff;
  border: 1px solid var(--line);
}

.compare-col h3 {
  margin: 0 0 18px;
  font-size: 1.25rem;
}

.compare-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.compare-col li {
  padding: 14px 14px 14px 16px;
  border-radius: 12px;
  background: var(--bg);
  color: var(--muted);
}

.compare-col li strong {
  display: block;
  color: var(--ink);
  margin-bottom: 4px;
}

.compare-col.bad h3 {
  color: var(--bad);
}

.compare-col.good {
  border-color: rgba(31, 111, 255, 0.25);
  box-shadow: var(--shadow);
}

.compare-col.good h3 {
  color: var(--blue);
}

.compare-col.good li {
  background: var(--blue-soft);
}

/* Services */
.services {
  padding: 80px 0;
}

.service-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.service-item {
  padding: 28px 22px;
  border-radius: var(--radius);
  background: linear-gradient(180deg, #102a5c, #1f6fff);
  color: #fff;
  min-height: 180px;
}

.service-item span {
  font-family: var(--display);
  font-weight: 800;
  opacity: 0.7;
}

.service-item h3 {
  margin: 12px 0 8px;
}

.service-item p {
  margin: 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.95rem;
}

/* Support */
.support {
  padding: 80px 0;
  background: var(--bg);
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.support-card {
  padding: 26px 22px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
}

.support-card h3 {
  margin: 0 0 8px;
  color: var(--blue-deep);
}

.support-card p {
  margin: 0;
  color: var(--muted);
}

/* Join */
.join {
  padding: 80px 0;
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  counter-reset: none;
}

.steps li {
  position: relative;
  padding: 26px 22px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
}

.steps em {
  font-style: normal;
  font-family: var(--display);
  font-weight: 800;
  color: var(--orange);
  font-size: 1.2rem;
}

.steps h3 {
  margin: 10px 0 8px;
}

.steps p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* Contact */
.contact {
  padding: 80px 0;
  background:
    linear-gradient(135deg, rgba(15, 47, 116, 0.96), rgba(31, 111, 255, 0.94)),
    #0b3d91;
  color: #fff;
}

.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: 36px;
  align-items: start;
}

.contact .section-en {
  color: #b9d4ff;
}

.contact-copy h2 {
  margin: 0 0 12px;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
}

.contact-copy > p {
  color: rgba(255, 255, 255, 0.85);
}

.contact-hotline {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.contact-hotline a {
  padding: 12px 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  font-size: 1.15rem;
  font-weight: 800;
  font-family: var(--display);
}

.contact-form {
  background: #fff;
  color: var(--ink);
  border-radius: 20px;
  padding: 28px;
  display: grid;
  gap: 14px;
  box-shadow: var(--shadow);
}

.contact-form label {
  display: grid;
  gap: 6px;
}

.contact-form span {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--muted);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 14px;
  outline: none;
  background: #f8fbff;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(31, 111, 255, 0.12);
}

.form-tip {
  margin: 0;
  text-align: center;
  color: var(--muted);
  font-size: 0.88rem;
}

.form-success {
  margin: 0;
  text-align: center;
  color: var(--ok);
  font-weight: 700;
}

/* Footer */
.site-footer {
  background: #0b1a33;
  color: rgba(255, 255, 255, 0.78);
  padding-top: 48px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1.3fr;
  gap: 28px;
  padding-bottom: 36px;
}

.footer-brand .logo {
  margin-bottom: 12px;
  color: #fff;
}

.footer-brand p,
.footer-col p {
  margin: 0 0 8px;
  font-size: 0.92rem;
}

.footer-col h4 {
  margin: 0 0 14px;
  color: #fff;
}

.footer-col a:hover,
.footer-brand a:hover,
.footer-bottom a:hover {
  color: #8ec5ff;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 18px 0 28px;
  font-size: 0.88rem;
}

.footer-bottom .container {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  justify-content: space-between;
}

.footer-bottom p {
  margin: 0;
}

/* Float bar */
.float-bar {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 120;
  display: grid;
  gap: 8px;
}

.float-bar a {
  min-width: 108px;
  text-align: center;
  padding: 12px 14px;
  border-radius: 12px;
  color: #fff;
  font-weight: 800;
  box-shadow: var(--shadow);
}

.float-bar a:first-child {
  background: var(--blue);
}

.float-bar a:last-child {
  background: linear-gradient(135deg, var(--orange), var(--orange-deep));
}

/* Reveal */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.in {
  opacity: 1;
  transform: none;
}

/* Responsive */
@media (max-width: 980px) {
  .nav,
  .header-actions {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .hero-grid,
  .compare,
  .contact-wrap,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero-panel {
    min-height: 380px;
  }

  .cap-grid,
  .feature-band-grid,
  .service-row,
  .support-grid,
  .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .hero {
    padding: 48px 0 64px;
  }

  .hero-stats,
  .cap-grid,
  .feature-band-grid,
  .service-row,
  .support-grid,
  .steps {
    grid-template-columns: 1fr;
  }

  .phone-stack {
    width: 240px;
    height: 360px;
  }

  .phone {
    width: 190px;
    height: 360px;
  }

  .float-bar {
    left: 12px;
    right: 12px;
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .footer-bottom .container {
    flex-direction: column;
  }
}