:root {
  --bg-base: #f4f7fc;
  --text-primary: #1a2332;
  --text-secondary: #5a6578;
  --text-muted: #8b95a8;
  --accent: #3d6df0;
  --accent-2: #7c5ce0;
  --glass-bg: rgba(255, 255, 255, 0.55);
  --glass-border: rgba(255, 255, 255, 0.75);
  --glass-shadow: 0 8px 32px rgba(31, 45, 80, 0.08);
  --glass-blur: 20px;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --nav-height: 76px;
  --max-width: 1200px;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text-primary);
  background: var(--bg-base);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Ambient background blobs */
.ambient {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.ambient__blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.55;
  animation: float 18s ease-in-out infinite;
}

.ambient__blob--1 {
  width: 520px;
  height: 520px;
  background: linear-gradient(135deg, #a8c4ff, #c4b5fd);
  top: -120px;
  right: -80px;
}

.ambient__blob--2 {
  width: 420px;
  height: 420px;
  background: linear-gradient(135deg, #9ee4d4, #a8d4ff);
  bottom: 10%;
  left: -100px;
  animation-delay: -6s;
}

.ambient__blob--3 {
  width: 360px;
  height: 360px;
  background: linear-gradient(135deg, #f5c4e8, #b8d4ff);
  top: 45%;
  right: 15%;
  animation-delay: -12s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(24px, -20px) scale(1.04); }
  66% { transform: translate(-16px, 16px) scale(0.98); }
}

/* Glass utility */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

.glass--strong {
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(28px) saturate(200%);
  -webkit-backdrop-filter: blur(28px) saturate(200%);
}

/* Layout */
.container {
  width: min(100% - 40px, var(--max-width));
  margin-inline: auto;
}

/* Navigation — 通栏极高透明；选中项半透明玻璃 */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: linear-gradient(180deg,
      rgba(255, 255, 255, 0.12) 0%,
      rgba(255, 255, 255, 0.06) 55%,
      rgba(248, 250, 255, 0.04) 100%);
  backdrop-filter: blur(52px) saturate(240%);
  -webkit-backdrop-filter: blur(52px) saturate(240%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.22);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.28),
    0 4px 24px rgba(31, 45, 80, 0.03);
  transition: var(--transition);
}

.nav::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(118deg,
      rgba(255, 255, 255, 0.1) 0%,
      transparent 45%,
      rgba(168, 196, 255, 0.04) 100%);
  pointer-events: none;
}

.nav::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg,
      transparent 0%,
      rgba(61, 109, 240, 0.12) 50%,
      transparent 100%);
  pointer-events: none;
}

.nav__inner {
  position: relative;
  z-index: 1;
  width: min(100%, var(--max-width));
  height: 100%;
  margin-inline: auto;
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  padding: 0 8px;
}

.nav__checkbox {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.nav__brand {
  align-self: center;
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  padding: 8px 14px 8px 8px;
  margin-left: -8px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: var(--transition);
}

.nav__brand:hover {
  background: linear-gradient(135deg,
      rgba(255, 255, 255, 0.45) 0%,
      rgba(240, 245, 255, 0.28) 100%);
  backdrop-filter: blur(24px) saturate(220%);
  -webkit-backdrop-filter: blur(24px) saturate(220%);
  border-color: rgba(255, 255, 255, 0.7);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.95),
    inset 0 -1px 0 rgba(255, 255, 255, 0.25),
    0 8px 24px rgba(61, 109, 240, 0.14);
}

.nav__logo {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: linear-gradient(145deg, var(--accent) 0%, var(--accent-2) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.85rem;
  font-weight: 800;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.35),
    0 4px 16px rgba(61, 109, 240, 0.38);
  border: 1px solid rgba(255, 255, 255, 0.25);
  transition: var(--transition);
}

.nav__brand:hover .nav__logo {
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.5),
    0 6px 22px rgba(61, 109, 240, 0.45),
    0 0 20px rgba(124, 92, 224, 0.25);
  transform: scale(1.04);
}

.nav__links {
  display: flex;
  align-items: stretch;
  align-self: stretch;
  height: 100%;
  gap: 0;
  list-style: none;
  margin: 0 -8px 0 0;
}

.nav__links li {
  display: flex;
  height: 100%;
}

.nav__links a {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-height: var(--nav-height);
  overflow: hidden;
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0 22px;
  border-radius: 0;
  border: none;
  border-left: 1px solid transparent;
  border-right: 1px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
}

.nav__links a::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 0;
  background: linear-gradient(145deg,
      rgba(255, 255, 255, 0.88) 0%,
      rgba(245, 248, 255, 0.82) 50%,
      rgba(240, 235, 255, 0.78) 100%);
  backdrop-filter: blur(28px) saturate(240%);
  -webkit-backdrop-filter: blur(28px) saturate(240%);
  opacity: 0;
  transition: var(--transition);
  pointer-events: none;
}

.nav__links a::after {
  content: "";
  position: absolute;
  z-index: -1;
  top: 0;
  left: 12%;
  right: 12%;
  height: 1px;
  background: linear-gradient(90deg,
      transparent,
      rgba(255, 255, 255, 0.95),
      transparent);
  opacity: 0;
  transition: var(--transition);
  pointer-events: none;
}

.nav__links a:hover,
.nav__links a:focus-visible {
  color: var(--accent);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.5),
    inset 0 -1px 0 rgba(61, 109, 240, 0.04);
}

.nav__links a:hover::before,
.nav__links a:focus-visible::before {
  opacity: 1;
  background: linear-gradient(145deg,
      rgba(255, 255, 255, 0.52) 0%,
      rgba(235, 242, 255, 0.38) 50%,
      rgba(240, 232, 255, 0.32) 100%);
}

.nav__links a:hover::after,
.nav__links a:focus-visible::after {
  opacity: 0.6;
}

body:has(#about:target) .nav__links a[href="#about"],
body:has(#tob:target) .nav__links a[href="#tob"],
body:has(#toc:target) .nav__links a[href="#toc"],
body:has(#contact:target) .nav__links a[href="#contact"] {
  color: var(--accent);
  font-weight: 600;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.95),
    inset 0 -1px 0 rgba(61, 109, 240, 0.08);
}

body:has(#about:target) .nav__links a[href="#about"]::before,
body:has(#tob:target) .nav__links a[href="#tob"]::before,
body:has(#toc:target) .nav__links a[href="#toc"]::before,
body:has(#contact:target) .nav__links a[href="#contact"]::before {
  opacity: 1;
  background: linear-gradient(145deg,
      rgba(255, 255, 255, 0.92) 0%,
      rgba(245, 248, 255, 0.88) 50%,
      rgba(238, 232, 255, 0.85) 100%);
  backdrop-filter: blur(32px) saturate(250%);
  -webkit-backdrop-filter: blur(32px) saturate(250%);
}

body:has(#about:target) .nav__links a[href="#about"]::after,
body:has(#tob:target) .nav__links a[href="#tob"]::after,
body:has(#toc:target) .nav__links a[href="#toc"]::after,
body:has(#contact:target) .nav__links a[href="#contact"]::after {
  opacity: 1;
}

.nav__toggle {
  align-self: center;
  display: none;
  width: 44px;
  height: 44px;
  background: linear-gradient(145deg,
      rgba(255, 255, 255, 0.45) 0%,
      rgba(255, 255, 255, 0.22) 100%);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-radius: 12px;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.75),
    0 2px 10px rgba(61, 109, 240, 0.06);
  transition: var(--transition);
}

.nav__toggle:hover {
  background: linear-gradient(145deg,
      rgba(255, 255, 255, 0.78) 0%,
      rgba(235, 242, 255, 0.5) 100%);
  backdrop-filter: blur(24px) saturate(240%);
  -webkit-backdrop-filter: blur(24px) saturate(240%);
  border-color: rgba(255, 255, 255, 0.88);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 1),
    inset 0 -1px 0 rgba(255, 255, 255, 0.25),
    0 8px 24px rgba(61, 109, 240, 0.16);
  transform: translateY(-1px);
}

.nav__toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

#nav-toggle:checked+.nav__toggle span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

#nav-toggle:checked+.nav__toggle span:nth-child(2) {
  opacity: 0;
}

#nav-toggle:checked+.nav__toggle span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Hero */
.hero {
  min-height: 55vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
}

.hero__title {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero__title span {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero__desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 36px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

.hero#news .container {
  text-align: center;
}

.hero#news {
  padding-bottom: 0;
}

.news-section {
  padding-top: 0;
  padding-bottom: 48px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.btn--primary {
  background: linear-gradient(135deg, var(--accent), #5b4de8);
  color: #fff;
  box-shadow: 0 8px 24px rgba(61, 109, 240, 0.35);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(61, 109, 240, 0.42);
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.5);
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.85);
}

/* Sections */
section {
  padding: 50px 0;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* About */
.about__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.about__card {
  padding: 32px 28px;
  border-radius: var(--radius-lg);
  transition: var(--transition);
}

.about__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(31, 45, 80, 0.1);
}

.about__card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.about__card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* News marquee */
.news-section .container {
  overflow: hidden;
}

#new.news-scroll {
  overflow: hidden;
  max-width: 100%;
  margin-inline: auto;
  padding: 8px 0 20px;
  --news-mask: linear-gradient(90deg, transparent 0%, #000 6%, #000 94%, transparent 100%);
  -webkit-mask-image: var(--news-mask);
  mask-image: var(--news-mask);
}

.news-scroll__track {
  display: flex;
  width: max-content;
  will-change: transform;
  animation: news-marquee 40s linear infinite;
}

.news-scroll__track:hover {
  animation-play-state: paused;
}

@keyframes news-marquee {
  0% {
    transform: translateX(0);
  }

  100% {
    transform: translateX(-50%);
  }
}

.news-scroll__group {
  display: flex;
  flex-shrink: 0;
  align-items: stretch;
  gap: 24px;
  padding-right: 24px;
}

.news-scroll__group .about__card {
  flex: 0 0 auto;
  width: clamp(280px, 32vw, 380px);
  min-height: 100%;
}

.news-scroll__group .about__card:hover {
  transform: translateY(-4px) scale(1.01);
}

@media (prefers-reduced-motion: reduce) {
  #new.news-scroll {
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-mask-image: none;
    mask-image: none;
    scroll-behavior: smooth;
    scrollbar-width: thin;
  }

  .news-scroll__track {
    animation: none;
    width: max-content;
  }

  .news-scroll__group[aria-hidden="true"] {
    display: none;
  }
}

.about__story {
  margin-bottom: 48px;
  padding: 48px;
  border-radius: var(--radius-lg);
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: center;
}

.about__story h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.about__story p {
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.about__metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.about__metric {
  padding: 24px;
  border-radius: var(--radius-md);
  text-align: center;
}

.about__metric-value {
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.about__metric-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ToB */
.tob__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.product-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 56px rgba(31, 45, 80, 0.12);
}

.product-card__header {
  padding: 36px 32px 28px;
  position: relative;
  overflow: hidden;
}

.product-card__header::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.15;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

.product-card--xcs .product-card__header::before {
  background: linear-gradient(135deg, #0d9488, #3d6df0);
}

.product-card__label {
  position: relative;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 8px;
}

.product-card--xcs .product-card__label {
  color: #0d9488;
}

.product-card__name {
  position: relative;
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.product-card__subtitle {
  position: relative;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.product-card__body {
  padding: 28px 32px 36px;
}

.product-card__body p {
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.product-card__name,
.product-card__subtitle {
  display: inline-block;
}

.product-card__subtitle {
  margin-left: 10px;
}

.product-card__footer {
  padding: 0 32px 32px;
}

.product-card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
  font-size: 0.92rem;
  transition: var(--transition);
}

.product-card__link:hover {
  gap: 10px;
}

/* ToC */
.toc__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.toc-card {
  padding: 36px 28px;
  border-radius: var(--radius-lg);
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.toc-card::after {
  content: "";
  position: absolute;
  bottom: -40%;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 200px;
  border-radius: 50%;
  opacity: 0.12;
  filter: blur(40px);
  transition: var(--transition);
  pointer-events: none;
}

.toc-card--dudu::after {
  background: #3d6df0;
}

.toc-card--book::after {
  background: #7c5ce0;
}

.toc-card--ta::after {
  background: #e879a9;
}

.toc-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 48px rgba(31, 45, 80, 0.1);
}

.toc-card:hover::after {
  bottom: -20%;
  opacity: 0.2;
}

.toc-card__icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 24px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  position: relative;
  z-index: 1;
}

.toc-card--dudu .toc-card__icon {
  background: linear-gradient(135deg, rgba(61, 109, 240, 0.2), rgba(61, 109, 240, 0.05));
}

.toc-card--book .toc-card__icon {
  background: linear-gradient(135deg, rgba(124, 92, 224, 0.2), rgba(124, 92, 224, 0.05));
}

.toc-card--ta .toc-card__icon {
  background: linear-gradient(135deg, rgba(232, 121, 169, 0.2), rgba(232, 121, 169, 0.05));
}

.toc-card__tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.toc-card--dudu .toc-card__tag {
  background: rgba(61, 109, 240, 0.12);
  color: var(--accent);
}

.toc-card--book .toc-card__tag {
  background: rgba(124, 92, 224, 0.12);
  color: var(--accent-2);
}

.toc-card--ta .toc-card__tag {
  background: rgba(232, 121, 169, 0.15);
  color: #c44d7a;
}

.toc-card h3 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.toc-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  position: relative;
  z-index: 1;
}

.toc-card .product-card__link {
  position: relative;
  z-index: 1;
  margin-top: 20px;
}

/* Contact */
.contact {
  padding-bottom: 60px;
}

.contact__box {
  padding: 56px 48px;
  border-radius: var(--radius-lg);
  text-align: center;
}

.contact__box h2 {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.contact__box p {
  color: var(--text-secondary);
  margin-bottom: 28px;
  max-width: 520px;
  margin-inline: auto;
}

/* 客服模态框 */
body.cs-modal-open {
  overflow: hidden;
}

.cs-modal {
  position: fixed;
  inset: 0;
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.35s ease, visibility 0.35s;
}

.cs-modal.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.cs-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(10, 18, 42, 0.55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.cs-modal__panel {
  position: relative;
  z-index: 1;
  width: 550px;
  height: 430px;
  max-width: calc(100vw - 32px);
  max-height: calc(100vh - 40px);
  border-radius: 18px;
  overflow: hidden;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.92) 0%, rgba(240, 245, 255, 0.88) 100%);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.8) inset,
    0 0 0 1px rgba(61, 109, 240, 0.15),
    0 24px 64px rgba(31, 45, 80, 0.22),
    0 0 80px rgba(61, 109, 240, 0.12);
  transform: scale(0.94) translateY(12px);
  transition: transform 0.4s cubic-bezier(0.34, 1.4, 0.64, 1);
}

.cs-modal.is-open .cs-modal__panel {
  transform: scale(1) translateY(0);
}

.cs-modal__panel::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg,
      rgba(61, 109, 240, 0.55),
      rgba(124, 92, 224, 0.45),
      rgba(61, 109, 240, 0.25),
      rgba(158, 228, 212, 0.4));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  z-index: 3;
}

.cs-modal__glow {
  position: absolute;
  top: -40%;
  left: -20%;
  width: 140%;
  height: 80%;
  background: radial-gradient(ellipse at center, rgba(61, 109, 240, 0.18), transparent 70%);
  pointer-events: none;
  z-index: 0;
  animation: csModalGlow 4s ease-in-out infinite;
}

@keyframes csModalGlow {
  0%, 100% { opacity: 0.6; transform: translateY(0); }
  50% { opacity: 1; transform: translateY(8px); }
}

.cs-modal__corners {
  position: absolute;
  inset: 10px;
  pointer-events: none;
  z-index: 2;
}

.cs-modal__corners span {
  position: absolute;
  width: 14px;
  height: 14px;
  border-color: rgba(61, 109, 240, 0.45);
  border-style: solid;
  border-width: 0;
}

.cs-modal__corners span:nth-child(1) {
  top: 0;
  left: 0;
  border-top-width: 2px;
  border-left-width: 2px;
}

.cs-modal__corners span:nth-child(2) {
  top: 0;
  right: 0;
  border-top-width: 2px;
  border-right-width: 2px;
}

.cs-modal__corners span:nth-child(3) {
  bottom: 0;
  left: 0;
  border-bottom-width: 2px;
  border-left-width: 2px;
}

.cs-modal__corners span:nth-child(4) {
  bottom: 0;
  right: 0;
  border-bottom-width: 2px;
  border-right-width: 2px;
}

.cs-modal__close {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 4;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  line-height: 1;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 2px 12px rgba(31, 45, 80, 0.1);
  transition: var(--transition);
}

.cs-modal__close:hover {
  color: var(--accent);
  background: #fff;
  box-shadow: 0 4px 16px rgba(61, 109, 240, 0.2);
  transform: rotate(90deg);
}

.cs-modal__iframe {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  border: none;
  display: block;
  background: var(--bg-base);
}

/* Footer */
.footer {
  background: #f8f9fa;
  border-top: 1px solid #d1d9e6;
  padding: 40px 20px 44px;
  text-align: center;
}

.footer__inner {
  max-width: 800px;
  margin-inline: auto;
}

.footer__brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 18px;
}

.footer__logo {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(145deg, var(--accent) 0%, var(--accent-2) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.78rem;
  font-weight: 800;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(61, 109, 240, 0.28);
}

.footer__name {
  font-size: 1rem;
  font-weight: 700;
  color: #333333;
  letter-spacing: 0.02em;
}

.footer__desc {
  font-size: 0.875rem;
  line-height: 1.75;
  color: #666666;
  margin-bottom: 20px;
}

.footer__icp {
  font-size: 0.8125rem;
  color: #888888;
  margin-bottom: 8px;
}

.footer__icp a {
  color: #3498db;
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer__icp a:hover {
  color: var(--accent);
  text-decoration: underline;
}

.footer__copy {
  font-size: 0.8125rem;
  color: #999999;
}

/* Responsive */
@media (max-width: 1024px) {
  .about__grid {
    grid-template-columns: 1fr;
  }

  .about__story {
    grid-template-columns: 1fr;
    padding: 36px 28px;
  }

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

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

@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
  }

  section {
    padding: 56px 0;
  }

  .hero#news {
    min-height: auto;
    padding-top: calc(var(--nav-height) + 28px);
    padding-bottom: 24px;
  }

  .hero__title {
    font-size: clamp(1.65rem, 7.5vw, 2.1rem);
    line-height: 1.25;
    margin-bottom: 16px;
  }

  .hero__desc {
    font-size: 0.9375rem;
    line-height: 1.75;
    margin-bottom: 28px;
    max-width: 22em;
    margin-left: auto;
    margin-right: auto;
  }

  .hero__actions {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    width: 100%;
    max-width: 300px;
    margin-inline: auto;
  }

  .hero__actions .btn {
    width: 100%;
    padding: 15px 24px;
  }

  .news-section {
    padding-top: 16px;
    padding-bottom: 32px;
  }

  #new.news-scroll {
    padding: 4px 0 12px;
    --news-mask: linear-gradient(90deg, transparent 0%, #000 3%, #000 97%, transparent 100%);
    -webkit-mask-image: var(--news-mask);
    mask-image: var(--news-mask);
  }

  .news-scroll__group {
    gap: 16px;
    padding-right: 16px;
  }

  .news-scroll__group .about__card {
    width: min(78vw, 288px);
    padding: 22px 20px;
  }

  .news-scroll__group .about__card h3 {
    font-size: 1.05rem;
    margin-bottom: 10px;
  }

  .news-scroll__group .about__card p {
    font-size: 0.875rem;
    line-height: 1.7;
  }

  #about {
    padding-top: 28px;
  }

  .section-header {
    margin-bottom: 40px;
  }

  .section-title {
    font-size: clamp(1.5rem, 5vw, 1.85rem);
  }

  .section-desc {
    font-size: 0.9375rem;
    line-height: 1.7;
  }

  .about__story {
    padding: 28px 22px;
    gap: 28px;
  }

  .about__card {
    padding: 26px 22px;
  }

  .about__card p {
    line-height: 1.7;
  }

  .product-card__header,
  .product-card__body {
    padding-left: 24px;
    padding-right: 24px;
  }

  .product-card__footer {
    padding: 0 24px 28px;
  }

  .toc-card {
    padding: 32px 24px;
  }

  .nav__toggle {
    display: flex;
  }

  .nav__links {
    position: fixed;
    z-index: 999;
    top: var(--nav-height);
    left: 0;
    right: 0;
    align-self: auto;
    height: auto;
    margin: 0;
    flex-direction: column;
    align-items: stretch;
    padding: 16px 20px 24px;
    border-radius: 0;
    background: linear-gradient(180deg,
        rgba(255, 255, 255, 0.2) 0%,
        rgba(248, 250, 255, 0.12) 100%);
    backdrop-filter: blur(44px) saturate(220%);
    -webkit-backdrop-filter: blur(44px) saturate(220%);
    border: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.22);
    box-shadow:
      inset 0 1px 0 rgba(255, 255, 255, 0.35),
      0 16px 40px rgba(31, 45, 80, 0.06);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: var(--transition);
  }

  #nav-toggle:checked~.nav__links {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav__links li {
    height: auto;
  }

  .nav__links a {
    width: 100%;
    min-height: 0;
    height: auto;
    text-align: center;
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.18);
    margin-bottom: 4px;
    box-shadow: none;
  }

  .nav__links a::before {
    border-radius: var(--radius-sm);
  }

  .nav__links a:hover,
  .nav__links a:focus-visible {
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: 0 4px 16px rgba(61, 109, 240, 0.1);
  }

  .nav__links a:hover::before,
  .nav__links a:focus-visible::before {
    background: linear-gradient(145deg,
        rgba(255, 255, 255, 0.5) 0%,
        rgba(235, 242, 255, 0.38) 100%);
  }

  body:has(#about:target) .nav__links a[href="#about"],
  body:has(#tob:target) .nav__links a[href="#tob"],
  body:has(#toc:target) .nav__links a[href="#toc"],
  body:has(#contact:target) .nav__links a[href="#contact"] {
    border-color: rgba(255, 255, 255, 0.75);
    box-shadow:
      inset 0 1px 0 rgba(255, 255, 255, 0.95),
      0 6px 20px rgba(61, 109, 240, 0.12);
  }

  body:has(#about:target) .nav__links a[href="#about"]::before,
  body:has(#tob:target) .nav__links a[href="#tob"]::before,
  body:has(#toc:target) .nav__links a[href="#toc"]::before,
  body:has(#contact:target) .nav__links a[href="#contact"]::before {
    background: linear-gradient(145deg,
        rgba(255, 255, 255, 0.92) 0%,
        rgba(245, 248, 255, 0.88) 100%);
  }

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

  .contact__box {
    padding: 40px 24px;
  }
}

@media (max-width: 480px) {
  .container {
    width: min(100% - 28px, var(--max-width));
  }

  section {
    padding: 48px 0;
  }

  .hero#news {
    padding-top: calc(var(--nav-height) + 20px);
    padding-bottom: 20px;
  }

  .hero__title {
    font-size: 1.625rem;
    margin-bottom: 14px;
  }

  .hero__desc {
    font-size: 0.875rem;
    margin-bottom: 24px;
    max-width: none;
  }

  .hero__actions {
    max-width: none;
    gap: 10px;
  }

  .hero__actions .btn {
    font-size: 0.9rem;
    padding: 14px 20px;
  }

  .news-section {
    padding-top: 12px;
    padding-bottom: 28px;
  }

  .news-scroll__group .about__card {
    width: min(82vw, 272px);
    padding: 20px 18px;
  }

  #about {
    padding-top: 24px;
  }

  .section-header {
    margin-bottom: 32px;
  }

  .about__story {
    padding: 24px 18px;
  }

  .about__card {
    padding: 22px 18px;
  }

  .about__metric {
    padding: 20px 16px;
  }

  .contact__box {
    padding: 32px 20px;
  }

  .contact__box p {
    line-height: 1.7;
  }
}