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

:root {
  --bg: #0A0F1E;
  --bg2: #0D1530;
  --card: rgba(21, 30, 54, 0.85);
  --line: rgba(148, 163, 184, 0.16);
  --text: #F3F6FC;
  --sub: #A9BCDE;
  --dim: #6E84AB;
  --blue: #3B82F6;
  --blue2: #06B6D4;
  --purple: #8B5CF6;
  --purple2: #D946EF;
  --orange: #F97316;
  --orange2: #F59E0B;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Noto Sans CJK SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  line-height: 1.6;
}

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

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ===== 背景装饰 ===== */
.bg-fixed {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(900px 600px at 10% -5%, rgba(59, 130, 246, .18), transparent 60%),
    radial-gradient(900px 600px at 90% 20%, rgba(139, 92, 246, .15), transparent 60%),
    radial-gradient(1000px 700px at 50% 100%, rgba(249, 115, 22, .12), transparent 60%),
    linear-gradient(180deg, #0A0F1E 0%, #0D1530 50%, #0A0F1E 100%);
}

.bg-fixed::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(148, 163, 184, .04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, .04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 30%, transparent 100%);
}

/* ===== 导航 ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 18px 0;
  backdrop-filter: blur(20px);
  background: rgba(10, 15, 30, 0.7);
  border-bottom: 1px solid var(--line);
  transition: padding 0.3s;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--blue), var(--purple) 60%, var(--orange));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 19px;
  font-weight: 900;
  color: #fff;
}

.logo-text {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 1.5px;
}

.logo-text small {
  display: block;
  font-size: 10px;
  color: var(--dim);
  letter-spacing: 2px;
  font-weight: 400;
}

.menu {
  display: flex;
  gap: 40px;
}

.menu a {
  color: var(--sub);
  font-size: 15px;
  transition: color 0.2s;
}

.menu a:hover {
  color: var(--text);
}

.nav-cta {
  padding: 10px 22px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--blue), var(--purple));
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s;
  width: 100px;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(99, 102, 241, .4);
}

/* ===== Hero ===== */
.hero {
  padding: 180px 0 120px;
  position: relative;
  text-align: center;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  letter-spacing: 4px;
  color: var(--sub);
  padding: 8px 20px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.08);
  border: 1px solid var(--line);
}

.hero-kicker .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--orange);
}

.hero h1 {
  margin-top: 32px;
  font-size: 88px;
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: 2px;
}

.hero h1 .grad {
  background: linear-gradient(95deg, #EAF1FF 10%, #9DC0FF 40%, #C4B5FD 70%, #FDBA74 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero h1 .accent {
  color: var(--orange);
}

.hero-sub {
  margin: 32px auto 0;
  max-width: 760px;
  font-size: 20px;
  color: var(--sub);
  letter-spacing: 1px;
  line-height: 1.8;
}

.hero-cta {
  margin-top: 56px;
  display: flex;
  gap: 18px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  padding: 16px 36px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.25s;
}

.btn-primary {
  background: linear-gradient(135deg, var(--blue), var(--purple));
  color: #fff;
  box-shadow: 0 10px 30px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 40px rgba(99, 102, 241, .55);
}

.btn-ghost {
  background: rgba(148, 163, 184, 0.08);
  color: var(--text);
  border: 1px solid var(--line);
}

.btn-ghost:hover {
  background: rgba(148, 163, 184, 0.16);
}

/* 三大业务色条 */
.tri-strip {
  display: flex;
  gap: 4px;
  justify-content: center;
  margin-top: 80px;
}

.tri-strip span {
  height: 4px;
  width: 80px;
  border-radius: 2px;
}

.tri-strip span:nth-child(1) {
  background: var(--blue);
}

.tri-strip span:nth-child(2) {
  background: var(--purple);
}

.tri-strip span:nth-child(3) {
  background: var(--orange);
}

/* ===== 业务区 ===== */
.section {
  padding: 120px 0;
  position: relative;
}

.section-head {
  text-align: center;
  margin-bottom: 80px;
}

.section-kicker {
  font-size: 13px;
  letter-spacing: 4px;
  color: var(--sub);
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.section-kicker::before,
.section-kicker::after {
  content: "";
  width: 30px;
  height: 1px;
  background: var(--line);
}

.section-title {
  margin-top: 18px;
  font-size: 52px;
  font-weight: 900;
  letter-spacing: 2px;
  line-height: 1.2;
}

.section-sub {
  margin-top: 18px;
  color: var(--sub);
  font-size: 18px;
}

.biz-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.biz-card {
  position: relative;
  padding: 44px 36px;
  border-radius: 24px;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(21, 30, 54, .92), rgba(13, 19, 38, .92));
  border: 1px solid var(--line);
  transition: transform 0.4s, border-color 0.4s;
}

.biz-card:hover {
  transform: translateY(-8px);
}

.biz-card.c-blue:hover {
  border-color: rgba(59, 130, 246, .5);
}

.biz-card.c-purple:hover {
  border-color: rgba(139, 92, 246, .5);
}

.biz-card.c-orange:hover {
  border-color: rgba(249, 115, 22, .5);
}

.biz-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--c1), var(--c2));
}

.biz-card::after {
  content: "";
  position: absolute;
  top: -120px;
  right: -120px;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--glow), transparent 70%);
}

.biz-card>* {
  position: relative;
  z-index: 1;
}

.biz-card .num {
  position: absolute;
  top: 28px;
  right: 32px;
  font-size: 72px;
  font-weight: 900;
  line-height: 1;
  -webkit-text-stroke: 1.2px rgba(148, 163, 184, .25);
  color: transparent;
}

.biz-icon {
  width: 76px;
  height: 76px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--c1), var(--c2));
  box-shadow: 0 12px 30px var(--shadow);
}

.biz-icon svg {
  width: 38px;
  height: 38px;
}

.biz-card h3 {
  margin-top: 28px;
  font-size: 32px;
  font-weight: 800;
  letter-spacing: 1.5px;
}

.biz-card .sub {
  margin-top: 10px;
  font-size: 15px;
  color: var(--sub);
  letter-spacing: 0.5px;
}

.biz-card .value {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--vc);
}

.biz-card ul {
  margin-top: 22px;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.biz-card ul li {
  font-size: 13px;
  padding: 6px 14px;
  border-radius: 999px;
  color: var(--sub);
  border: 1px solid var(--line);
  background: rgba(148, 163, 184, .06);
}

.biz-card .more {
  margin-top: 32px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--vc);
  letter-spacing: 1px;
  transition: gap 0.2s;
}

.biz-card:hover .more {
  gap: 12px;
}

.c-blue {
  --c1: var(--blue);
  --c2: var(--blue2);
  --vc: #7DB8FF;
  --glow: rgba(59, 130, 246, .15);
  --shadow: rgba(59, 130, 246, .3);
}

.c-purple {
  --c1: var(--purple);
  --c2: var(--purple2);
  --vc: #C4B5FD;
  --glow: rgba(139, 92, 246, .15);
  --shadow: rgba(139, 92, 246, .3);
}

.c-orange {
  --c1: var(--orange);
  --c2: var(--orange2);
  --vc: #FDBA74;
  --glow: rgba(249, 115, 22, .14);
  --shadow: rgba(249, 115, 22, .3);
}

/* ===== 数据区 ===== */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 30px;
}

.stat {
  padding: 32px 24px;
  border-radius: 20px;
  background: var(--card);
  border: 1px solid var(--line);
  text-align: center;
}

.stat .v {
  font-size: 56px;
  font-weight: 900;
  letter-spacing: 1px;
  background: linear-gradient(135deg, #fff, #A9BCDE);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat .l {
  margin-top: 8px;
  color: var(--sub);
  font-size: 14px;
  letter-spacing: 2px;
}

/* ===== 优势 ===== */
.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.why {
  padding: 36px 28px;
  border-radius: 20px;
  background: var(--card);
  border: 1px solid var(--line);
  transition: transform 0.3s;
}

.why:hover {
  transform: translateY(-4px);
}

.why .n {
  font-size: 14px;
  color: var(--dim);
  letter-spacing: 2px;
}

.why h4 {
  margin-top: 8px;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 1.5px;
}

.why p {
  margin-top: 14px;
  color: var(--sub);
  font-size: 14px;
  line-height: 1.7;
}

/* ===== 流程 ===== */
.process-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin-top: 30px;
  position: relative;
}

.step {
  text-align: center;
  padding: 32px 16px;
}

.step .ring {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 900;
  color: #fff;
  position: relative;
}

.step h4 {
  margin-top: 20px;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 1.5px;
}

.step p {
  margin-top: 8px;
  color: var(--sub);
  font-size: 13px;
}

.step-1 .ring {
  background: linear-gradient(135deg, var(--blue), var(--blue2));
}

.step-2 .ring {
  background: linear-gradient(135deg, var(--purple), var(--purple2));
}

.step-3 .ring {
  background: linear-gradient(135deg, var(--orange), var(--orange2));
}

.step-4 .ring {
  background: linear-gradient(135deg, #FBBF24, var(--orange));
}

.step-5 .ring {
  background: linear-gradient(135deg, var(--blue), var(--purple));
}

/* ===== 关于 ===== */
.about-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-left h2 {
  font-size: 44px;
  font-weight: 900;
  letter-spacing: 2px;
  line-height: 1.2;
}

.about-left h2 .grad {
  background: linear-gradient(95deg, #9DC0FF, #C4B5FD 50%, #FDBA74);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.about-left p {
  margin-top: 24px;
  color: var(--sub);
  font-size: 16px;
  line-height: 1.9;
}

.about-left .tag {
  display: inline-block;
  padding: 8px 16px;
  margin: 8px 8px 0 0;
  border-radius: 999px;
  font-size: 13px;
  color: var(--sub);
  border: 1px solid var(--line);
  background: rgba(148, 163, 184, .06);
}

.about-right {
  position: relative;
}

.about-card {
  padding: 36px 32px;
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(21, 30, 54, .92), rgba(13, 19, 38, .92));
  border: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}

.about-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--blue), var(--purple), var(--orange));
}

.about-card h3 {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 1.5px;
}

.about-card .quote {
  margin-top: 18px;
  color: var(--sub);
  font-size: 15px;
  line-height: 1.9;
}

.about-card .quote::before {
  content: '"';
  color: var(--purple);
  font-size: 32px;
  line-height: 0;
  vertical-align: -8px;
  margin-right: 4px;
}

.about-card .quote::after {
  content: '"';
  color: var(--purple);
  font-size: 32px;
  line-height: 0;
  vertical-align: -8px;
  margin-left: 4px;
}

/* ===== 联系 ===== */
.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  padding: 60px;
  border-radius: 28px;
  background: linear-gradient(135deg, rgba(59, 130, 246, .12), rgba(139, 92, 246, .12));
  border: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}

.contact-wrap::before {
  content: "";
  position: absolute;
  top: -100px;
  right: -100px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(249, 115, 22, .18), transparent 60%);
}

.contact-left h2 {
  font-size: 40px;
  font-weight: 900;
  letter-spacing: 2px;
  line-height: 1.3;
}

.contact-left p {
  margin-top: 20px;
  color: var(--sub);
  font-size: 16px;
  line-height: 1.8;
}

.contact-right {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.ci {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 22px;
  border-radius: 14px;
  background: rgba(10, 15, 30, 0.6);
  border: 1px solid var(--line);
}

.ci-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--blue), var(--purple));
  flex-shrink: 0;
}

.ci-icon svg {
  width: 20px;
  height: 20px;
}

.ci small {
  display: block;
  color: var(--dim);
  font-size: 12px;
  letter-spacing: 2px;
}

.ci span {
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
}

/* ===== Footer ===== */
.footer {
  margin-top: 120px;
  padding: 60px 0 40px;
  border-top: 1px solid var(--line);
  background: rgba(5, 9, 16, 0.6);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 60px;
}

.footer h5 {
  font-size: 14px;
  color: var(--text);
  margin-bottom: 18px;
  letter-spacing: 2px;
}

.footer ul {
  list-style: none;
}

.footer li {
  margin-bottom: 10px;
}

.footer a {
  color: var(--sub);
  font-size: 14px;
  transition: color 0.2s;
}

.footer a:hover {
  color: var(--text);
}

.footer-bottom {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--dim);
  font-size: 12px;
  letter-spacing: 1.5px;
}

.footer-bottom .lang {
  display: flex;
  gap: 16px;
}

/* 响应式 */
@media (max-width: 960px) {
  .menu {
    display: none;
  }

  .hero h1 {
    font-size: 56px;
  }

  .section-title {
    font-size: 36px;
  }

  .biz-grid,
  .stats,
  .why-grid {
    grid-template-columns: 1fr 1fr;
  }

  .process-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .about-wrap,
  .contact-wrap {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 600px) {
  .container {
    padding: 0 20px;
  }

  .hero {
    padding: 140px 0 80px;
  }

  .hero h1 {
    font-size: 40px;
  }

  .section {
    padding: 80px 0;
  }

  .section-title {
    font-size: 28px;
  }

  .biz-grid,
  .stats,
  .why-grid,
  .process-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .contact-wrap {
    padding: 32px 20px;
  }
}

@media (max-width: 480px) {

  
  .stats,
  .why-grid,
  .process-grid,
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .step {
    text-align: center;
    padding: 2px 16px;
}
}