* {
  box-sizing: border-box;
}

:root {
  --bg: #FFFFFF;
  --soft: #F5F7FB;
  --blue-soft: #EEF4FF;
  --card: #FFFFFF;
  --nav: rgba(255,255,255,0.96);
  --blue: #315CFF;
  --blue-active: #4F73FF;
  --blue-light: #6B8DFF;
  --title: #17213A;
  --text: #252B3A;
  --muted: #5F6B82;
  --hint: #8A95AA;
  --line: rgba(49,92,255,0.14);
  --shadow: 0 14px 34px rgba(31,45,85,0.08);
  --footer: #101828;
  --footer-text: #D8E0F2;
  --gradient: linear-gradient(135deg, #315CFF 0%, #5F7DFF 52%, #8CA5FF 100%);
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.75;
  overflow-x: hidden;
  padding-top: 118px;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: var(--nav);
  border-bottom: 1px solid rgba(49,92,255,0.12);
  backdrop-filter: blur(10px);
}

.container {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 74px;
}

.logo {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
}

.logo img {
  max-height: 52px;
  width: auto;
  display: block;
  object-fit: contain;
}

.nav-core {
  display: flex;
  align-items: center;
  gap: 24px;
  white-space: nowrap;
  flex-wrap: nowrap;
  min-width: 0;
}

.nav-core a {
  color: var(--text);
  position: relative;
  font-weight: 600;
  font-size: 15px;
  transition: color .2s ease;
}

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

.nav-core a.active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -12px;
  width: 28px;
  height: 3px;
  border-radius: 999px;
  background: var(--blue);
  transform: translateX(-50%);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.main-btn,
.register-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient);
  color: #FFFFFF;
  border-radius: 999px;
  min-height: 42px;
  padding: 0 22px;
  font-weight: 700;
  box-shadow: 0 10px 22px rgba(49,92,255,0.25);
  border: 0;
  cursor: pointer;
  white-space: nowrap;
}

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

.menu-toggle,
.drawer-close {
  display: none;
  border: 0;
  background: transparent;
  color: var(--title);
  cursor: pointer;
}

.menu-toggle {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid var(--line);
  position: relative;
}

.menu-toggle span,
.menu-toggle::before,
.menu-toggle::after {
  content: "";
  position: absolute;
  left: 11px;
  width: 20px;
  height: 2px;
  border-radius: 99px;
  background: var(--blue);
}

.menu-toggle span {
  top: 20px;
}

.menu-toggle::before {
  top: 14px;
}

.menu-toggle::after {
  top: 26px;
}

.channel-bar {
  background: var(--soft);
  border-bottom: 1px solid rgba(49,92,255,0.10);
}

.channel-scroll {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow-x: auto;
  padding: 9px 0;
  scrollbar-width: none;
}

.channel-scroll::-webkit-scrollbar {
  display: none;
}

.channel-bar a {
  display: inline-flex;
  align-items: center;
  color: var(--muted);
  padding: 8px 13px;
  border-radius: 999px;
  font-size: 14px;
  white-space: nowrap;
  transition: all .2s ease;
}

.channel-bar a:hover,
.channel-bar a.active {
  color: var(--blue);
  background: rgba(49,92,255,0.10);
}

.drawer-mask {
  position: fixed;
  inset: 0;
  z-index: 1100;
  background: rgba(15,23,42,0.45);
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s ease;
}

.mobile-drawer {
  position: fixed;
  left: 0;
  top: 0;
  width: 84%;
  max-width: 320px;
  height: 100vh;
  z-index: 1101;
  background: #FFFFFF;
  transform: translateX(-102%);
  transition: transform .25s ease;
  display: flex;
  flex-direction: column;
  box-shadow: 18px 0 44px rgba(15,23,42,0.16);
}

.drawer-open .drawer-mask {
  opacity: 1;
  pointer-events: auto;
}

.drawer-open .mobile-drawer {
  transform: translateX(0);
}

.drawer-open {
  overflow: hidden;
}

.drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 18px 14px;
  border-bottom: 1px solid rgba(49,92,255,0.10);
}

.drawer-head .logo img {
  max-height: 46px;
}

.drawer-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  border: 1px solid var(--line);
  font-size: 22px;
}

.drawer-menu {
  padding: 14px;
  overflow-y: auto;
}

.drawer-menu a {
  display: flex;
  align-items: center;
  min-height: 42px;
  padding: 0 12px;
  border-radius: 12px;
  color: var(--text);
  font-weight: 600;
}

.drawer-menu a.active,
.drawer-menu a:hover {
  color: var(--blue);
  background: rgba(49,92,255,0.08);
}

.mobile-bottom-nav {
  display: none;
}

main {
  min-height: 60vh;
}

.section {
  padding: 64px 0;
}

.section.compact {
  padding: 42px 0;
}

.section-soft {
  background: var(--soft);
}

.section-blue {
  background: var(--blue-soft);
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 26px;
}

.eyebrow {
  color: var(--blue);
  font-weight: 800;
  letter-spacing: .08em;
  font-size: 13px;
  margin: 0 0 8px;
}

h1,
h2,
h3,
.section-title {
  color: var(--title);
  line-height: 1.3;
  margin: 0;
}

h1 {
  font-size: clamp(30px, 5vw, 54px);
}

h2,
.section-title {
  font-size: clamp(24px, 3vw, 34px);
}

h3 {
  font-size: 20px;
}

.lead {
  color: var(--muted);
  font-size: 17px;
  margin: 16px 0 0;
}

.banner-slider {
  max-width: 1180px;
  margin: 24px auto 34px;
  border-radius: 22px;
  background: var(--soft);
  box-shadow: var(--shadow);
  overflow: hidden;
  position: relative;
  height: min(360px, 30vw);
  min-height: 260px;
}

.banner-track {
  display: flex;
  height: 100%;
  transition: transform .45s ease;
}

.banner-slide {
  min-width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.banner-slider img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: var(--soft);
}

.banner-caption,
.banner-text,
.slide-title,
.slide-desc,
.slide-content,
.slide-card,
.banner-card {
  display: none !important;
}

.slider-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.72);
  background: rgba(255,255,255,0.82);
  box-shadow: 0 10px 22px rgba(31,45,85,0.16);
  cursor: pointer;
}

.slider-arrow::before {
  content: "";
  position: absolute;
  width: 11px;
  height: 11px;
  border-top: 2px solid var(--blue);
  border-left: 2px solid var(--blue);
  top: 15px;
}

.slider-prev {
  left: 14px;
}

.slider-prev::before {
  transform: rotate(-45deg);
  left: 17px;
}

.slider-next {
  right: 14px;
}

.slider-next::before {
  transform: rotate(135deg);
  left: 13px;
}

.slider-dots {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 14px;
  display: flex;
  justify-content: center;
  gap: 8px;
}

.slider-dot {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  border: 0;
  background: rgba(49,92,255,0.24);
  cursor: pointer;
}

.slider-dot.active {
  width: 28px;
  background: var(--blue);
}

.hero-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, .9fr);
  gap: 26px;
  align-items: center;
}

.hero-card,
.card,
.zone-card,
.info-card,
.review-card,
.faq-card,
.notice-card {
  background: var(--card);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  border-radius: 18px;
}

.hero-card {
  padding: 34px;
}

.hero-side {
  padding: 20px;
  background: linear-gradient(180deg, #FFFFFF, #F6F9FF);
}

.hero-side img,
.page-hero-img img,
.content-img {
  width: 100%;
  max-height: 285px;
  object-fit: contain;
  background: var(--soft);
  border-radius: 16px;
}

.quick-grid,
.advantage-row,
.product-grid,
.matrix-grid,
.review-grid,
.faq-grid,
.service-grid,
.notice-grid,
.link-grid,
.article-grid {
  display: grid;
  gap: 18px;
}

.quick-grid {
  grid-template-columns: repeat(4, 1fr);
}

.advantage-row {
  grid-template-columns: repeat(4, 1fr);
}

.product-grid {
  grid-template-columns: repeat(4, 1fr);
}

.matrix-grid {
  grid-template-columns: repeat(3, 1fr);
}

.review-grid {
  grid-template-columns: repeat(3, 1fr);
}

.faq-grid {
  grid-template-columns: repeat(2, 1fr);
}

.service-grid {
  grid-template-columns: repeat(3, 1fr);
}

.notice-grid {
  grid-template-columns: repeat(2, 1fr);
}

.link-grid {
  grid-template-columns: repeat(5, 1fr);
}

.article-grid {
  grid-template-columns: repeat(3, 1fr);
}

.info-card,
.card,
.zone-card,
.review-card,
.faq-card,
.notice-card {
  padding: 22px;
}

.info-card p,
.card p,
.zone-card p,
.review-card p,
.faq-card p,
.notice-card p {
  margin: 10px 0 0;
  color: var(--muted);
}

.number-badge,
.tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--blue);
  background: rgba(49,92,255,0.10);
  border-radius: 999px;
  padding: 4px 11px;
  font-size: 13px;
  font-weight: 800;
}

.topic-layout,
.app-layout,
.about-layout,
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
  gap: 28px;
  align-items: center;
}

.topic-image,
.page-hero-img {
  border-radius: 22px;
  overflow: hidden;
  background: var(--soft);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  padding: 14px;
}

.topic-image img,
.zone-card img,
.info-card img,
.product-card img,
.content-img {
  max-width: 100%;
  height: auto;
  max-height: 230px;
  object-fit: contain;
}

.product-card {
  padding: 14px;
}

.product-card img {
  width: 100%;
  height: 155px;
  object-fit: contain;
  background: var(--soft);
  border-radius: 14px;
}

.product-card h3 {
  margin-top: 14px;
}

.cta-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  background: linear-gradient(135deg, #EEF4FF 0%, #FFFFFF 100%);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 30px;
  box-shadow: var(--shadow);
}

.page-hero {
  background: linear-gradient(180deg, #F8FAFF 0%, #FFFFFF 100%);
  padding: 56px 0 44px;
}

.page-layout .lead {
  margin-bottom: 22px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--hint);
  font-size: 14px;
  margin-bottom: 14px;
}

.breadcrumb a {
  color: var(--blue);
  font-weight: 700;
}

.text-block {
  padding: 28px;
}

.text-block p {
  color: var(--muted);
  margin: 12px 0 0;
}

.list-clean {
  list-style: none;
  padding: 0;
  margin: 18px 0 0;
  display: grid;
  gap: 12px;
}

.list-clean li {
  padding-left: 22px;
  position: relative;
  color: var(--muted);
}

.list-clean li::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--blue);
  border-radius: 50%;
  position: absolute;
  left: 0;
  top: 11px;
}

.footer {
  background: var(--footer);
  color: var(--footer-text);
  padding: 50px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr repeat(3, 1fr);
  gap: 28px;
}

.footer .logo img {
  max-height: 48px;
}

.footer p,
.footer a {
  color: var(--footer-text);
  opacity: .88;
}

.footer a:hover {
  opacity: 1;
  color: #FFFFFF;
}

.footer-links {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  margin-top: 30px;
  padding-top: 18px;
  color: rgba(216,224,242,0.72);
  font-size: 14px;
}

.register-page {
  min-height: 70vh;
  display: grid;
  place-items: center;
  padding: 60px 16px;
  background: linear-gradient(180deg, #F8FAFF 0%, #FFFFFF 100%);
}

.register-box {
  width: min(720px, 100%);
  padding: 36px;
  text-align: center;
}

@media (max-width: 1024px) {
  .nav-core {
    gap: 16px;
  }
  .quick-grid,
  .advantage-row,
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .matrix-grid,
  .review-grid,
  .service-grid,
  .article-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .link-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 820px) {
  body {
    padding-top: 74px;
    padding-bottom: 68px;
  }
  .site-header {
    border-bottom: 1px solid rgba(49,92,255,0.12);
  }
  .header-inner {
    min-height: 74px;
    display: grid;
    grid-template-columns: 48px 1fr auto;
    gap: 10px;
  }
  .menu-toggle {
    display: inline-flex;
  }
  .site-header .logo {
    justify-content: center;
  }
  .site-header .logo img {
    max-height: 46px;
  }
  .nav-core,
  .channel-bar {
    display: none;
  }
  .header-actions {
    justify-content: flex-end;
  }
  .register-btn {
    min-height: 38px;
    padding: 0 16px;
    font-size: 14px;
  }
  .hero-intro,
  .topic-layout,
  .app-layout,
  .about-layout,
  .page-layout,
  .cta-band {
    grid-template-columns: 1fr;
  }
  .section {
    padding: 42px 0;
  }
  .section-head {
    display: block;
  }
  .banner-slider {
    width: min(100% - 32px, 1180px);
    height: 190px;
    min-height: 150px;
    margin-top: 16px;
    border-radius: 16px;
  }
  .slider-arrow {
    width: 36px;
    height: 36px;
  }
  .quick-grid,
  .advantage-row,
  .product-grid,
  .matrix-grid,
  .review-grid,
  .faq-grid,
  .service-grid,
  .notice-grid,
  .link-grid,
  .article-grid {
    grid-template-columns: 1fr;
  }
  .product-card img {
    height: 140px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .mobile-bottom-nav {
    position: fixed;
    z-index: 999;
    left: 0;
    right: 0;
    bottom: 0;
    height: 62px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    background: #FFFFFF;
    border-top: 1px solid rgba(31,45,85,0.10);
    box-shadow: 0 -8px 28px rgba(31,45,85,0.08);
  }
  .mobile-bottom-nav a {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
  }
  .mobile-bottom-nav a.active {
    color: var(--blue);
  }
}

@media (max-width: 480px) {
  .container {
    width: min(100% - 24px, 1180px);
  }
  .hero-card,
  .text-block,
  .cta-band,
  .register-box {
    padding: 24px;
  }
  .info-card,
  .card,
  .zone-card,
  .review-card,
  .faq-card,
  .notice-card {
    padding: 18px;
  }
  h1 {
    font-size: 30px;
  }
}