:root {
  --navy: #061b43;
  --blue: #0765d6;
  --red: #d10909;
  --muted: #5d6a7b;
  --line: #dce7f5;
  --soft: #f5f9ff;
  --white: #fff;
  --shadow: 0 12px 32px rgba(25, 72, 125, .08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--navy);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  background: #fff;
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
.container { width: min(1200px, calc(100% - 48px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: 88px;
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid #e6edf6;
  backdrop-filter: blur(12px);
}
.nav-wrap { height: 100%; display: flex; align-items: center; }
.logo {
  display: inline-flex;
  align-items: baseline;
  min-width: 214px;
  font: 700 38px/1 Arial, sans-serif;
  letter-spacing: -2px;
}
.logo span { color: #0962cd; }
.logo strong { color: #ee3023; }
.main-nav { display: flex; gap: clamp(26px, 3.2vw, 52px); margin: 0 auto; }
.main-nav a { position: relative; font-size: 16px; font-weight: 600; color: #202938; }
.main-nav a::after {
  position: absolute;
  right: 0;
  bottom: -8px;
  left: 0;
  height: 2px;
  content: "";
  background: var(--red);
  transform: scaleX(0);
  transition: transform .2s ease;
}
.main-nav a:hover::after { transform: scaleX(1); }
.nav-actions { display: flex; gap: 16px; margin-left: 32px; }
.btn {
  display: inline-flex;
  min-width: 174px;
  height: 56px;
  align-items: center;
  justify-content: center;
  padding: 0 30px;
  border: 1px solid var(--red);
  border-radius: 5px;
  font-size: 17px;
  font-weight: 700;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 10px 25px rgba(197, 13, 13, .16); }
.btn-primary { color: #fff; background: linear-gradient(135deg, #d40b0b, #a90000); }
.btn-outline { color: var(--red); background: rgba(255, 255, 255, .78); }
.btn-small { min-width: 130px; height: 46px; padding: 0 22px; font-size: 15px; }
.menu-toggle { display: none; }

.hero {
  position: relative;
  min-height: 650px;
  overflow: hidden;
  background:
    radial-gradient(circle at 82% 23%, rgba(131, 184, 255, .22), transparent 29%),
    linear-gradient(105deg, #fff 0%, #fbfdff 54%, #edf5ff 100%);
}
.hero-grid { position: relative; min-height: 650px; display: grid; grid-template-columns: 51% 49%; align-items: center; }
.hero-copy { position: relative; z-index: 2; padding: 70px 0 34px; }
.hero h1 { margin: 0 0 14px; font-size: clamp(36px, 3.5vw, 51px); line-height: 1.3; letter-spacing: -2px; }
.hero-subtitle { margin: 0 0 24px; font-size: clamp(20px, 1.85vw, 27px); font-weight: 600; }
.hero-highlight { margin: 0 0 12px; color: #d11111; font-size: 20px; font-weight: 700; }
.hero-description { margin: 0; color: #586477; font-size: 17px; }
.hero-actions { display: flex; gap: 18px; margin-top: 42px; }
.trust-list { display: flex; gap: 38px; margin: 36px 0 0; padding: 0; list-style: none; font-size: 15px; font-weight: 700; }
.trust-list li { display: flex; align-items: center; white-space: nowrap; }
.trust-list i {
  display: inline-flex;
  width: 34px;
  height: 34px;
  align-items: center;
  justify-content: center;
  margin-right: 9px;
  color: #145695;
  font-size: 23px;
  font-style: normal;
  border-radius: 50%;
  background: #f2f7fd;
}
.hero-art { position: absolute; top: 0; right: -105px; bottom: 0; left: 45%; }
.hero-art img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  -webkit-mask-image: linear-gradient(90deg, transparent 0, rgba(0,0,0,.7) 14%, #000 31%);
  mask-image: linear-gradient(90deg, transparent 0, rgba(0,0,0,.7) 14%, #000 31%);
  mix-blend-mode: multiply;
}

.mission {
  position: relative;
  overflow: hidden;
  padding: 20px 0 42px;
  background:
    linear-gradient(rgba(245, 249, 255, .75), rgba(245, 249, 255, .96)),
    repeating-linear-gradient(102deg, transparent 0 60px, rgba(78, 127, 188, .05) 61px 63px);
}
.mission::before, .mission::after {
  position: absolute;
  bottom: -100px;
  width: 360px;
  height: 260px;
  content: "";
  border: 28px solid rgba(77, 122, 175, .06);
  border-radius: 50%;
}
.mission::before { left: -100px; }
.mission::after { right: -100px; }
.mission-inner { position: relative; z-index: 1; text-align: center; }
.mission-icon {
  display: flex;
  width: 92px;
  height: 92px;
  align-items: center;
  justify-content: center;
  margin: -46px auto 10px;
  color: #16437d;
  font-size: 43px;
  border: 1px solid #d5e2f3;
  border-radius: 50%;
  background: rgba(244, 249, 255, .95);
}
.mission h2 { margin: 0; font-size: 36px; letter-spacing: 2px; }
.mission p { margin: 5px 0 0; color: #536783; font-size: 18px; }

.section { padding: 72px 0; }
.section-heading { margin-bottom: 52px; text-align: center; }
.section-heading h2 { position: relative; display: inline-block; margin: 0; font-size: 34px; letter-spacing: 2px; }
.section-heading h2::after {
  position: absolute;
  bottom: -16px;
  left: 50%;
  width: 38px;
  height: 4px;
  content: "";
  border-radius: 3px;
  background: var(--red);
  transform: translateX(-50%);
}

.advantages { background: #fff; }
.advantage-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 34px; align-items: stretch; }
.advantage-card {
  min-height: 430px;
  padding: 45px 34px 38px;
  text-align: center;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: #fff;
  box-shadow: var(--shadow);
}
.advantage-card.featured { border-color: #ea5050; box-shadow: 0 14px 35px rgba(196, 21, 21, .1); }
.line-icon { height: 82px; color: #0870d7; font: 700 72px/1 Arial, sans-serif; }
.featured .line-icon, .featured h3, .featured h4 { color: #c80b0b; }
.security-mark { position: relative; display: inline-block; }
.security-mark span {
  position: absolute;
  top: 4px;
  right: -56px;
  display: flex;
  width: 50px;
  height: 50px;
  align-items: center;
  justify-content: center;
  color: #d72727;
  font-size: 11px;
  font-weight: 700;
  line-height: 1.2;
  border: 2px solid #ed7777;
  border-radius: 50%;
  transform: rotate(11deg);
}
.advantage-card h3 { margin: 25px 0 12px; font-size: 25px; }
.advantage-card h4 { margin: 13px 0 10px; font-size: 22px; }
.advantage-card p { margin: 8px 0; color: #5b687a; font-size: 17px; }
.rule { width: 100%; height: 1px; margin: 10px 0 20px; background: #d8e1ed; }
.featured .rule { background: #ef9c9c; }

.scenarios { background: linear-gradient(180deg, #f6faff 0%, #fff 100%); }
.scenario-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.scenario-card {
  padding: 28px 14px 25px;
  text-align: center;
  border: 1px solid #dce7f5;
  border-radius: 10px;
  background: #fff;
  box-shadow: var(--shadow);
}
.round-icon {
  display: flex;
  width: 78px;
  height: 78px;
  align-items: center;
  justify-content: center;
  margin: 0 auto 14px;
  color: #0870d7;
  font: 700 39px/1 Arial, sans-serif;
  border-radius: 50%;
  background: #eff6ff;
}
.scenario-card h3 { margin: 0 0 8px; font-size: 22px; }
.scenario-card p { margin: 0; color: #687487; font-size: 14px; white-space: nowrap; }

.results {
  position: relative;
  overflow: hidden;
  padding: 62px 0 68px;
  color: #fff;
  background:
    radial-gradient(ellipse at 50% 115%, rgba(0, 111, 245, .55), transparent 48%),
    linear-gradient(110deg, transparent 0 50%, rgba(13, 105, 210, .14) 51% 52%, transparent 53%),
    linear-gradient(115deg, #021334 0%, #062b60 52%, #03193c 100%);
}
.results::before {
  position: absolute;
  right: -5%;
  bottom: -110px;
  left: -5%;
  height: 230px;
  content: "";
  opacity: .35;
  background: repeating-radial-gradient(ellipse at center bottom, transparent 0 26px, rgba(15, 119, 244, .55) 28px 30px, transparent 31px 50px);
}
.section-heading.light { margin-bottom: 54px; }
.section-heading.light h2 { color: #fff; }
.metrics { position: relative; z-index: 1; display: grid; grid-template-columns: repeat(3, 1fr); }
.metrics article { position: relative; text-align: center; }
.metrics article + article { border-left: 1px solid rgba(255, 255, 255, .48); }
.metric-icon { height: 55px; color: #2577c7; font: 300 55px/1 Arial, sans-serif; }
.metrics strong { display: block; margin: 7px 0 0; font: 700 58px/1.25 Arial, sans-serif; }
.metrics small { margin-left: 4px; font-size: 24px; }
.metrics p { margin: 5px 0 0; font-size: 18px; font-weight: 600; }

.contact {
  padding: 48px 0 50px;
  background:
    radial-gradient(ellipse at 50% 120%, rgba(98, 166, 246, .14), transparent 48%),
    linear-gradient(180deg, #fff, #f4f8ff);
}
.contact .section-heading { margin-bottom: 31px; }
.contact .section-heading h2 { font-size: 34px; }
.contact-inner { text-align: center; }
.contact-inner > p { margin: 0; color: #536783; font-size: 18px; }
.contact-actions { display: flex; justify-content: center; gap: 22px; margin-top: 24px; }

.site-footer { padding: 22px 0; color: rgba(255, 255, 255, .86); background: #032150; }
.footer-inner { display: flex; align-items: center; justify-content: center; gap: 42px; }
.footer-logo { min-width: 135px; font-size: 30px; }
.footer-copy p { margin: 1px 0; font-size: 14px; }

@media (max-width: 1100px) {
  .site-header { height: 76px; }
  .logo { min-width: 160px; font-size: 32px; }
  .main-nav { gap: 22px; }
  .nav-actions .btn-outline { display: none; }
  .nav-actions { margin-left: 22px; }
  .hero-art { left: 43%; opacity: .7; }
  .scenario-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 820px) {
  .container { width: min(100% - 32px, 680px); }
  .nav-wrap { justify-content: space-between; }
  .nav-actions { display: none; }
  .menu-toggle {
    display: flex;
    width: 42px;
    height: 42px;
    flex-direction: column;
    gap: 5px;
    align-items: center;
    justify-content: center;
    padding: 0;
    border: 0;
    border-radius: 5px;
    background: #eff5fd;
  }
  .menu-toggle span { width: 21px; height: 2px; background: #0b376d; transition: .2s; }
  .main-nav {
    position: absolute;
    top: 76px;
    right: 0;
    left: 0;
    display: none;
    flex-direction: column;
    gap: 0;
    padding: 12px 24px 18px;
    border-top: 1px solid #e6edf6;
    background: #fff;
    box-shadow: 0 18px 30px rgba(11, 48, 91, .12);
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 11px 0; }
  .main-nav a::after { display: none; }
  .hero, .hero-grid { min-height: auto; }
  .hero-grid { display: block; padding-bottom: 310px; }
  .hero-copy { padding: 70px 0 25px; }
  .hero h1 { font-size: clamp(34px, 8vw, 46px); }
  .hero-art { top: auto; right: -20%; bottom: -20px; left: -8%; height: 370px; opacity: .82; }
  .hero-art img { object-position: 58% center; }
  .trust-list { flex-wrap: wrap; gap: 18px 28px; }
  .mission h2 { font-size: 30px; }
  .advantage-grid { grid-template-columns: 1fr; }
  .advantage-card { min-height: 0; }
  .metrics strong { font-size: 46px; }
  .metrics p { padding: 0 18px; font-size: 15px; }
  .footer-inner { flex-direction: column; gap: 8px; text-align: center; }
}

@media (max-width: 560px) {
  .container { width: calc(100% - 28px); }
  .logo { min-width: auto; font-size: 30px; }
  .hero-copy { padding-top: 48px; }
  .hero h1 { letter-spacing: -1px; }
  .hero-subtitle { font-size: 19px; }
  .hero-highlight { font-size: 17px; }
  .hero-description { font-size: 15px; }
  .desktop-only { display: none; }
  .hero-actions, .contact-actions { flex-direction: column; }
  .hero-actions .btn, .contact-actions .btn { width: 100%; }
  .trust-list { display: grid; grid-template-columns: 1fr 1fr; font-size: 13px; }
  .trust-list li:last-child { grid-column: 1 / -1; }
  .mission { padding-bottom: 34px; }
  .mission-icon { width: 78px; height: 78px; margin-top: -39px; font-size: 36px; }
  .mission h2 { font-size: 26px; }
  .mission p { font-size: 15px; }
  .section { padding: 56px 0; }
  .section-heading { margin-bottom: 44px; }
  .section-heading h2, .contact .section-heading h2 { font-size: 28px; }
  .scenario-grid { grid-template-columns: 1fr; }
  .scenario-card p { white-space: normal; }
  .results { padding: 52px 0; }
  .metrics { grid-template-columns: 1fr; gap: 28px; }
  .metrics article + article { padding-top: 28px; border-top: 1px solid rgba(255, 255, 255, .35); border-left: 0; }
  .metrics p { font-size: 16px; }
  .footer-copy p { font-size: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}