/* Visual direction: Datawhale's white canvas, vivid blue feature banner,
   straight navigation and clearly separated entry modules. Existing copy stays intact. */
:root {
  --ink: #17233b;
  --ink-soft: #59677d;
  --copper: #1477ed;
  --copper-deep: #0757d8;
  --amber: #61c5ff;
  --terracotta: #1477ed;
  --ivory: #ffffff;
  --cream: #ffffff;
  --surface: #ffffff;
  --line: #d9e8f7;
  --line-soft: #e8f0fa;
  --shadow: 0 8px 24px rgba(27, 107, 187, .09);
  --radius: 12px;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}

html { scroll-padding-top: 90px; }
body, .about-body { background: #fff; }

.site-header,
.site-header[data-scrolled="true"] {
  top: 0;
  left: 0;
  width: 100%;
  height: 74px;
  padding: 0 clamp(22px, 5vw, 80px);
  border: 0;
  border-bottom: 1px solid #e8eef5;
  border-radius: 0;
  background: rgba(255,255,255,.97);
  box-shadow: none;
  backdrop-filter: blur(12px);
  transform: none;
}
.brand { gap: 9px; }
.brand-logo { width: 36px; height: 36px; }
.brand-name { color: #152846; font-size: 23px; letter-spacing: -.04em; }
.nav {
  justify-self: end;
  gap: clamp(12px, 2.5vw, 34px);
  padding: 0;
  border: 0;
  border-radius: 0;
  background: none;
  box-shadow: none;
  font-size: 15px;
}
.nav a,
.site-header[data-scrolled="true"] .nav a {
  padding: 25px 0 21px;
  border-radius: 0;
  color: #1b2b44;
  font-weight: 700;
}
.nav a::after,
.nav a:hover::after,
.nav a.active::after,
.site-header[data-scrolled="true"] .nav a::after {
  display: block;
  position: absolute;
  right: 0;
  bottom: 15px;
  left: 0;
  height: 3px;
  border-radius: 2px;
  background: #187dff;
  content: "";
  transform: scaleX(0);
  transition: transform 180ms ease;
}
.nav a:hover,
.nav a.active {
  color: #0b70ed;
  background: none;
  box-shadow: none;
}
.nav a:hover::after,
.nav a.active::after { transform: scaleX(1); }

.btn { min-height: 52px; padding: 0 27px; border-radius: 8px; font-size: 16px; }
.btn-primary,
.btn-primary:hover {
  color: #fff;
  background: #1175f1;
  box-shadow: 0 8px 18px rgba(17,117,241,.18);
}
.btn-primary:hover { background: #075ed3; }
.btn-secondary { color: #096ce7; background: #fff; border-color: #a8cef8; }
.btn-secondary:hover { color: #0757d8; background: #eef7ff; border-color: #2584f4; }

.hero {
  min-height: 746px;
  padding-top: 74px;
  background: #fff;
  border-bottom: 0;
}
.hero::before {
  position: absolute;
  top: 156px;
  left: -82px;
  width: 530px;
  height: 240px;
  border: 28px solid #eff9ff;
  border-radius: 50%;
  opacity: .7;
  transform: rotate(-19deg);
  content: "";
}
.hero-media {
  top: 118px;
  right: 0;
  bottom: auto;
  left: 40%;
  height: 500px;
  border: 0;
  border-radius: 0;
  background: #fff;
  box-shadow: none;
}
.hero-media img {
  object-position: center 42%;
  filter: saturate(.78) contrast(1.07);
}
.hero-media::after {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, #fff 0%, rgba(255,255,255,.85) 13%, rgba(255,255,255,.15) 43%, transparent 68%),
    linear-gradient(0deg, #fff 0%, transparent 24%);
  content: "";
}
.hero-shade { display: none; }
.hero-inner {
  display: block;
  width: min(100%, 1440px);
  padding: 98px clamp(24px, 5.5vw, 88px) 0;
}
.hero-copy { max-width: 48%; }
.mission,
.section-kicker,
.decision-hero .section-kicker,
.careers-copy .section-kicker,
.about-hero .section-kicker {
  gap: 8px;
  color: #157af2;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: .06em;
}
.mission span,
.section-kicker::before {
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: #1889ff;
  clip-path: none;
}
.hero h1 {
  max-width: 620px;
  margin: 32px 0 20px;
  color: #17233b;
  font-size: clamp(44px, 4.45vw, 64px);
  line-height: 1.19;
  letter-spacing: -.045em;
  overflow-wrap: normal;
}
.hero h1 span {
  color: #177bfa;
  background: none;
  -webkit-text-fill-color: currentColor;
}
.lead { max-width: 560px; color: #506078; font-size: clamp(19px, 1.55vw, 23px); line-height: 1.5; }
.hero-actions { margin-top: 29px; }
.advantage-chips {
  display: grid;
  grid-template-columns: repeat(5, minmax(0,1fr));
  gap: 14px;
  width: calc(100vw - clamp(48px, 11vw, 176px));
  max-width: 1264px;
  margin-top: 155px;
}
.advantage-chips li {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 13px;
  min-height: 96px;
  padding: 16px 12px;
  border: 1px solid #d9eafa;
  border-radius: 15px;
  background: #fff;
  color: #17233b;
  font-size: 19px;
  font-weight: 800;
  box-shadow: 0 3px 11px rgba(37,122,194,.12);
}
.advantage-chips li::before {
  width: 19px;
  height: 19px;
  margin: 0;
  border: 4px solid #1490fb;
  border-radius: 6px;
  background: #e9f8ff;
  box-shadow: 4px 4px 0 #bce9ff;
}

.journey {
  width: min(100%, 1336px);
  margin: 0 auto;
  padding: 72px clamp(24px, 5vw, 72px) 100px;
  border: 0;
  background: #fff;
}
.journey .section-kicker { justify-content: center; color: #157af2; }
.journey h2,
.decision-hero h2,
.careers-copy h2,
.about-hero h2 {
  color: #17233b;
  letter-spacing: -.035em;
}
.journey h2 { margin-top: 12px; font-size: clamp(31px, 3vw, 42px); }
.steps { margin-top: 48px; gap: 24px; }
.step {
  padding: 32px 28px;
  border: 1px solid #dcecfb;
  border-radius: 16px;
  background: #f8fcff;
  box-shadow: none;
}
.step:not(:last-child)::after { border-color: #b9dfff; }
.step-icon { border-color: #cde8ff; background: #e9f6ff; }
.step-icon svg { stroke: #1678e6; }
.step > span { color: #1b84ef; background: #e9f6ff; }
.step h3 { color: #17233b; }
.step p { color: #66748a; }

.decision-section {
  width: 100%;
  padding: 76px clamp(24px, 5vw, 72px);
  border: 0;
  background: #f1f8ff;
}
.decision-panel {
  grid-template-columns: minmax(340px,.78fr) minmax(0,1.22fr);
  width: min(100%, 1296px);
  margin: auto;
  overflow: visible;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}
.decision-hero {
  align-content: start;
  min-height: auto;
  padding: 50px 45px;
  border: 0;
  border-radius: 16px 0 0 16px;
  background: #086af1;
}
.decision-hero .section-kicker { color: #bfe6ff; }
.decision-hero .section-kicker::before { background: #bfe6ff; }
.decision-hero h2 { color: #fff; font-size: clamp(31px, 3vw, 44px); }
.decision-hero p:last-child { color: #e8f4ff; }
.decision-matrix {
  gap: 10px;
  padding: 10px;
  border: 1px solid #d9eafb;
  border-left: 0;
  border-radius: 0 16px 16px 0;
  background: #fff;
}
.decision-card,
.decision-metrics,
.decision-needs,
.decision-audience {
  border-color: #e0edfa;
  border-radius: 9px;
  background: #fff;
}
.decision-card { min-height: 116px; padding: 17px; }
.decision-card h3,
.decision-audience h3,
.decision-needs h3 { color: #17233b; }
.decision-card p,
.decision-audience p,
.decision-needs p { color: #68778b; }
.decision-metrics div { background: #eaf6ff; }
.decision-metrics span { color: #4b6f99; }
.decision-needs li { color: #31658b; border-color: #d7eafd; background: #f4faff; }

.careers-section {
  gap: clamp(38px, 5vw, 76px);
  width: min(100%, 1380px);
  padding: 100px clamp(24px, 5vw, 72px);
  border: 0;
}
.careers-copy p { color: #59677d; }
.careers-belief,
.careers-values article { border-color: #dcecfb; border-radius: 13px; background: #fff; }
.careers-belief { box-shadow: 0 4px 20px rgba(30,103,180,.08); }
.careers-belief li { color: #1669bb; background: #edf7ff; }
.careers-values span { color: #fff; background: #147cf1; }
.careers-values h3 { color: #17233b; }
.careers-values p { color: #64748a; }

.about-home-section {
  width: 100%;
  min-height: auto;
  max-width: none;
  padding: 92px max(24px,calc((100vw - 1220px)/2));
  background: #f5faff;
}
.about-hero p,
.about-social-block > p { color: #59677d; }
.about-social-block h2 { color: #177af0; }
.about-divider,
.about-footer-line { color: #61748c; }
.about-divider span,
.about-footer-line span { background: #c8ddf2; }
.about-social-link span { color: #59677d; font-style: normal; }
.platform-logo { filter: none; }

.site-footer {
  position: relative;
  width: min(calc(100% - 48px), 1220px);
  margin: 20px auto 0;
  padding: 25px 0 32px;
  border: 0;
  border-top: 1px solid #dceaf7;
  border-radius: 0;
  background: #fff;
  box-shadow: none;
  gap: 9px;
}
.footer-top { position: absolute; top: 20px; right: 0; display: block; }
.footer-brand, .footer-top p { display: none; }
.footer-action { min-height: 0; padding: 0; border: 0; color: #8895a5; background: transparent; font-size: 12px; font-weight: 400; }
.footer-action:hover { color: #176fdb; }
.footer-legal { justify-content: center; gap: 4px 16px; padding: 0 74px; color: #8895a5; font-size: 12px; font-weight: 400; }
.footer-legal a { color: inherit; font-weight: 400; }
.footer-disclosures { display: flex; flex-wrap: wrap; align-items: start; justify-content: center; gap: 4px 21px; }
.footer-policy { display: block; min-width: 0; padding: 0; border: 0; }
.footer-policy summary { color: #8895a5; font-size: 12px; cursor: pointer; list-style: none; }
.footer-policy summary::-webkit-details-marker { display: none; }
.footer-policy summary:hover, .footer-policy summary:focus-visible { color: #176fdb; text-decoration: underline; }
.footer-policy[open] { flex-basis: 100%; }
.footer-policy[open] summary { text-align: center; }
.footer-policy p { max-width: 780px; margin: 9px auto 5px; color: #64748a; font-size: 13px; line-height: 1.75; text-align: left; }
.modal { border-color: #dceaf7; border-radius: 15px; background: #fff; }
.modal-backdrop { background: rgba(15,39,77,.45); }
.lead-form input:focus,
.lead-form textarea:focus { border-color: #1684f5; box-shadow: 0 0 0 3px #e1f1ff; }
.email-link { color: #0e6fdc; }
.form-success { color: #145ea4; border-color: #bddfff; background: #eff8ff; }

@media (max-width: 1080px) {
  .site-header, .site-header[data-scrolled="true"] { height: 70px; }
  .hero { min-height: 900px; padding-top: 70px; }
  .hero-inner { padding-top: 68px; }
  .hero-copy { max-width: 60%; }
  .hero-media { top: 320px; left: 39%; right: 0; height: 390px; }
  .advantage-chips { width: calc(100vw - 48px); margin-top: 300px; }
  .advantage-chips li { font-size: 16px; min-height: 82px; }
  .decision-panel { grid-template-columns: 1fr; }
  .decision-hero { border-radius: 16px 16px 0 0; }
  .decision-matrix { border: 1px solid #d9eafb; border-top: 0; border-radius: 0 0 16px 16px; }
  .about-home-section { padding: 75px 36px; }
}

@media (max-width: 760px) {
  .site-header, .site-header[data-scrolled="true"] {
    top: 0;
    width: 100%;
    min-height: 64px;
    height: 64px;
    padding: 0 19px;
    border-radius: 0;
  }
  .brand-name { font-size: 21px; }
  .hero { min-height: 940px; padding-top: 64px; }
  .hero::before { top: 95px; left: -190px; width: 390px; height: 150px; }
  .hero-inner { padding: 54px 20px 0; }
  .hero-copy { max-width: 100%; }
  .hero h1 { max-width: 570px; margin: 23px 0 14px; font-size: clamp(38px, 9.8vw, 54px); line-height: 1.18; }
  .hero h1 span { display: block; }
  .mission { font-size: 12px; }
  .lead { font-size: 17px; }
  .hero-actions { margin-top: 20px; }
  .hero-media { top: 385px; left: 0; right: 0; height: 265px; }
  .hero-media::after { background: linear-gradient(180deg, #fff 0%, transparent 19%, transparent 77%, #fff 100%); }
  .advantage-chips { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 9px; width: calc(100vw - 40px); margin-top: 298px; }
  .advantage-chips li { min-height: 63px; font-size: 15px; border-radius: 11px; }
  .advantage-chips li::before { width: 14px; height: 14px; border-width: 3px; }
  .journey { padding: 55px 20px 72px; }
  .steps { margin-top: 30px; }
  .step { max-width: none; padding: 25px; }
  .decision-section { padding: 58px 20px; }
  .decision-hero { padding: 34px 27px; }
  .decision-matrix { grid-template-columns: 1fr; }
  .decision-card { min-height: 0; }
  .decision-metrics, .decision-needs, .decision-audience { grid-column: 1; }
  .decision-metrics { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .decision-audience { grid-template-columns: 1fr; }
  .decision-audience article { border-right: 0; border-bottom: 1px solid #e4eef8; }
  .careers-section { padding: 72px 20px; }
  .about-home-section { padding: 64px 20px; }
  .about-social-block { padding: 0; }
  .site-footer { width: calc(100% - 40px); padding-bottom: 25px; }
  .footer-top { top: 4px; }
  .footer-legal { padding: 15px 0 0; gap: 3px 12px; }
  .footer-policy p { padding: 0 3px; }
}

@media (prefers-reduced-motion: reduce) {
  .nav a::after { transition: none; }
}