:root {
  --ink: #091423;
  --blue: #157aff;
  --cyan: #65e2ff;
  --muted: #667587;
  --line: #dce5ee;
  --bg: #f5f8fb;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font:
    16px/1.6 Arial,
    'PingFang SC',
    'Microsoft YaHei',
    sans-serif;
}
a {
  text-decoration: none;
  color: inherit;
}
button {
  font: inherit;
  cursor: pointer;
}
.wrap {
  max-width: 1180px;
  margin: auto;
  padding: 0 24px;
}
.nav {
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.top {
  position: fixed;
  inset: 0 0 auto;
  background: #091423ec;
  color: #fff;
  z-index: 5;
  backdrop-filter: blur(14px);
}
.brand {
  font-weight: 700;
  display: flex;
  gap: 10px;
  align-items: center;
}
.mark {
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  color: #061321;
  border-radius: 9px;
  padding: 3px 6px;
  font-size: 12px;
}
.links {
  display: flex;
  gap: 28px;
  color: #cbd7e4;
  font-size: 14px;
}
.links a:hover {
  color: #fff;
}
.navbtn {
  background: #65e2ff14;
  border: 1px solid #65e2ff66;
  color: #b7f4ff;
  border-radius: 99px;
  padding: 8px 16px;
}
.hero {
  padding-top: 70px;
  min-height: 730px;
  background: radial-gradient(
    circle at 78% 25%,
    #1f6088,
    #102a42 28%,
    #091423 68%
  );
  color: #fff;
  position: relative;
}
.hero-grid {
  min-height: 660px;
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  align-items: center;
  gap: 35px;
  position: relative;
}
.hero-content{
  position: relative;
  z-index: 2;
}
.hero-bg{
  height: 100%;
  object-fit: contain;
  position: absolute;
  bottom: 0;
  right: 0;
  z-index: 1;
}
.eyebrow,
.kicker {
  font-size: 13px;
  letter-spacing: 0.14em;
  font-weight: 800;
  color: var(--cyan);
}
h1 {
  font-size: clamp(44px, 6vw, 78px);
  line-height: 1.08;
  letter-spacing: -0.05em;
  margin: 18px 0;
}
h1 span {
  color: var(--cyan);
}
.hero p {
  color: #c7d5e2;
  font-size: 19px;
  max-width: 500px;
}
.actions {
  display: flex;
  gap: 12px;
  margin-top: 28px;
  flex-wrap: wrap;
}
.btn {
  border: 0;
  border-radius: 99px;
  padding: 12px 21px;
  min-height: 48px;
  font-weight: 700;
  transition: 0.2s;
}
.btn:hover {
  transform: translateY(-2px);
}
.primary {
  background: linear-gradient(100deg, var(--cyan), #2878ff);
  color: #061321;
}
.ghost {
  background: #ffffff12;
  color: #fff;
  border: 1px solid #ffffff3b;
}
.hero-art {
  display: grid;
  place-items: center;
  position: relative;
  min-height: 520px;
}
.hero-art:before {
  content: '';
  position: absolute;
  width: 440px;
  height: 440px;
  border: 1px solid #65e2ff44;
  border-radius: 50%;
  box-shadow: 0 0 90px #2ca5db2b inset;
}
.hero-art img {
  max-width: 100%;
  max-height: 590px;
  object-fit: contain;
  filter: drop-shadow(0 25px 28px #0008);
  position: relative;
}
.section {
  padding: 100px 0;
}
.head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 25px;
  margin-bottom: 38px;
}
.head h2 {
  font-size: clamp(32px, 4vw, 50px);
  line-height: 1.12;
  letter-spacing: -0.04em;
  margin: 10px 0;
}
.intro {
  max-width: 450px;
  color: var(--muted);
}
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.card,
.panel,
.feature {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 22px;
  overflow: hidden;
  box-shadow: 0 18px 50px #0a14220b;
}
.card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}
.card-body {
  padding: 21px;
}
.num {
  font-size: 13px;
  color: var(--blue);
  font-weight: 800;
}
.card h3 {
  font-size: 22px;
  margin: 6px 0;
}
.card p {
  margin: 0;
  color: var(--muted);
}
.dark {
  background: var(--ink);
  color: #fff;
}
.dark .intro {
  color: #a1b2c4;
}
.flow {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 70px;
  align-items: center;
}
.screen {
  border: 1px solid #ffffff1c;
  border-radius: 24px;
  padding: 25px;
  background: linear-gradient(145deg, #122a40, #0a1726);
}
.screen-top {
  display: flex;
  justify-content: space-between;
  color: #96aec2;
  font-size: 13px;
  border-bottom: 1px solid #ffffff18;
  padding-bottom: 14px;
}
.chat {
  display: flex;
  gap: 12px;
  margin: 20px 0;
}
.avatar {
  width: 42px;
  height: 42px;
  border-radius: 13px;
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  color: #071321;
  display: grid;
  place-items: center;
  font-weight: 800;
}
.bubble {
  border: 1px solid #ffffff26;
  background: #ffffff10;
  border-radius: 3px 15px 15px 15px;
  padding: 11px 14px;
}
.steps {
  display: grid;
  gap: 12px;
}
.step {
  display: flex;
  gap: 14px;
  border: 1px solid #ffffff18;
  background: #ffffff08;
  border-radius: 14px;
  padding: 13px;
}
.step i {
  color: var(--cyan);
  font-style: normal;
  font-weight: 800;
}
.step b {
  display: block;
}
.step small {
  color: #9eb0c2;
}
.models {
  background: #edf3f7;
}
.tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 24px;
}
.tab {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
  padding: 10px 18px;
  border-radius: 99px;
}
.tab.active {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}
.panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  padding: 30px;
}
.model-pic {
  background: #f1f5f8;
  border-radius: 18px;
  display: grid;
  place-items: center;
  min-height: 360px;
}
.model-pic img {
  max-height: 340px;
  max-width: 92%;
  object-fit: contain;
}
.panel h3 {
  font-size: 30px;
  margin: 8px 0;
}
.panel p {
  color: var(--muted);
}
.pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0;
}
.pill {
  background: #eaf3ff;
  color: #125ca8;
  border-radius: 8px;
  padding: 5px 10px;
  font-size: 14px;
}
.specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--line);
  padding-top: 18px;
  gap: 14px;
}
.spec strong {
  display: block;
  font-size: 18px;
}
.spec span {
  font-size: 13px;
  color: var(--muted);
}
.features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.feature {
  padding: 22px;
}
.feature h3 {
  margin: 10px 0 4px;
}
.feature p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}
.contact {
  background: linear-gradient(120deg, #0c1a2a, #0b4169);
  color: #fff;
}
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}
.contact h2 {
  font-size: 46px;
  line-height: 1.12;
}
.contact p {
  color: #b9ccdc;
}
.form {
  display: grid;
  gap: 12px;
}
.form input,
.form textarea {
  width: 100%;
  border: 1px solid #ffffff2b;
  background: #ffffff0c;
  color: #fff;
  border-radius: 12px;
  padding: 13px 15px;
  font: inherit;
}
.form textarea {
  min-height: 100px;
}
.form input::placeholder,
.form textarea::placeholder {
  color: #9cb2c5;
}
.note {
  font-size: 13px;
  color: #93aabd;
}
.footer {
  background: #07101c;
  color: #90a3b6;
  padding: 25px 0;
  font-size: 13px;
}
.footer .wrap {
  display: flex;
  justify-content: space-between;
}
.float {
  display: none;
}
.modal {
  position: fixed;
  inset: 0;
  background: #06111dcc;
  z-index: 9;
  display: none;
  place-items: center;
  padding: 20px;
}
.modal.open {
  display: grid;
}
.modal-box {
  background: #fff;
  border-radius: 20px;
  padding: 28px;
  max-width: 420px;
  width: 100%;
  position: relative;
}
.modal-box h3 {
  font-size: 28px;
  margin: 0 0 8px;
}
.close {
  position: absolute;
  right: 14px;
  top: 10px;
  border: 0;
  background: none;
  font-size: 25px;
  color: var(--muted);
}
.modal-box .form input {
  color: var(--ink);
  border-color: var(--line);
  background: #fff;
}
.modal-box .note {
  color: var(--muted);
}
@media (max-width: 800px) {
  .wrap {
    padding: 0 18px;
  }
  .links {
    display: none;
  }
  .nav {
    height: 62px;
  }
  .hero {
    padding-top: 62px;
  }
  .hero-bg{
    display: none;
  }
  .hero-grid,
  .flow,
  .contact-grid,
  .panel {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .hero-grid {
    padding-top: 40px !important;
  }
  .hero-art {
    min-height: 310px;
  }
  .hero-art:before {
    width: 280px;
    height: 280px;
  }
  .hero-art img {
    max-height: 340px;
  }
  .section {
    padding: 74px 0;
  }
  .head {
    display: block;
  }
  .intro {
    margin-top: 15px;
  }
  .cards,
  .features {
    grid-template-columns: 1fr;
  }
  .card img {
    height: 205px;
  }
  .model-pic {
    min-height: 280px;
  }
  .model-pic img {
    max-height: 280px;
  }
  .contact h2 {
    font-size: 38px;
  }
  .footer .wrap {
    display: block;
  }
  .float {
    display: block;
    position: fixed;
    z-index: 4;
    bottom: 14px;
    left: 18px;
    right: 18px;
  }
  .float button {
    width: 100%;
    box-shadow: 0 8px 24px #07101c55;
  }
}
/* Responsive polish and accessible interaction states. */
.brand small {
  display: block;
  font-size: 10px;
  letter-spacing: 0.22em;
  line-height: 1;
}
.hero {
  min-height: 790px;
}
.hero-grid {
  min-height: 720px;
}
.hero-art {
  height: 660px;
  min-height: 0;
}
.hero-art img {
  width: 100%;
  height: 620px;
  max-height: none;
  object-fit: contain;
}
.hero-art:before {
  width: 440px;
  height: 440px;
}
.hero-label {
  position: absolute;
  bottom: 22px;
  left: 10%;
  right: 0;
  border-left: 2px solid var(--cyan);
  padding-left: 15px;
}
.hero-label span {
  display: block;
  color: var(--cyan);
  font-size: 12px;
  letter-spacing: 0.15em;
}
.hero-label strong {
  display: block;
  font-size: 20px;
}
.hero-label small {
  color: #a0b7cc;
  font-size: 12px;
}
.hero-facts {
  display: flex;
  gap: 28px;
  margin-top: 40px;
  padding-top: 25px;
  border-top: 1px solid #ffffff22;
  font-size: 12px;
  color: #9eb2c7;
}
.hero-facts b {
  display: block;
  font-size: 18px;
  color: #e0effb;
  font-weight: 600;
}
.dark h2 {
  font-size: clamp(32px, 4vw, 50px);
  line-height: 1.18;
  margin: 15px 0 25px;
}
.avatar {
  flex: 0 0 42px;
}
.model-code {
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.04em;
}
.model-pic img {
  width: 100%;
  height: 340px;
}
.features {
  grid-template-columns: repeat(3, 1fr);
}
.feature p,
.step small {
  font-size: 16px;
}
.comparison {
  margin-top: 48px;
}
.comparison-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 18px;
}
.comparison-head h3 {
  font-size: 25px;
}
.comparison-head span,
.table-note {
  font-size: 13px;
  color: var(--muted);
}
.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
}
table {
  width: 100%;
  border-collapse: collapse;
  min-width: 700px;
  font-size: 14px;
}
th,
td {
  text-align: left;
  padding: 15px 18px;
  border-bottom: 1px solid #e8edf2;
}
thead th {
  background: #0c2135;
  color: #fff;
  font-weight: 600;
}
tbody th {
  font-weight: 600;
  white-space: nowrap;
}
tbody tr:nth-child(even) {
  background: #f8fafc;
}
tbody tr:last-child > * {
  border-bottom: 0;
}
.table-note {
  line-height: 1.7;
}
.options {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  margin-top: 22px;
  padding: 18px 24px;
}
.options summary {
  cursor: pointer;
  font-weight: 700;
  padding: 5px 0;
}
.option-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 25px;
}
.option-grid h4 {
  margin: 20px 0 8px;
}
.option-grid p {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 8px;
}
.form label {
  font-size: 14px;
  color: #e0eaf4;
}
.form label span {
  font-size: 12px;
  color: #a7bbce;
}
.form input,
.form textarea,
.form select {
  min-height: 48px;
}
.form select {
  font: inherit;
  color: #fff;
  border: 1px solid #ffffff2b;
  background: #183953;
  padding: 12px 14px;
  border-radius: 12px;
}
.form select option {
  background: #102b42;
  color: #fff;
}
.form textarea {
  resize: vertical;
}
.phone {
  display: block;
  font-size: 31px;
  letter-spacing: 0.03em;
  margin-top: 32px;
  font-weight: 700;
  color: var(--cyan);
}
.phone span {
  display: block;
  font-size: 14px;
  color: #b9ccdc;
  font-weight: 400;
  letter-spacing: 0;
}
.contact .note {
  color: #b9ccdc;
  font-size: 13px;
}
.contact #brief {
  margin: 10px 0;
  background: #061e33;
  min-height: 185px;
  font-size: 14px;
}
.contact #briefResult[hidden] {
  display: none;
}
.contact #briefResult {
  padding-top: 20px;
  border-top: 1px solid #ffffff2b;
}
.contact h2 {
  margin: 18px 0 25px;
}
.float .btn {
  display: block;
  text-align: center;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
:focus-visible {
  outline: 3px solid #3086ff;
  outline-offset: 5px;
}
section[id] {
  scroll-margin-top: 90px;
}
.card {
  transition:
    transform 0.25s,
    box-shadow 0.25s;
}
.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 50px #0a142215;
}
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition:
    opacity 0.5s,
    transform 0.5s;
}
.revealed {
  opacity: 1;
  transform: none;
}
.card img {
  aspect-ratio: 1.65;
}
.navbtn,
.btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
}
.footer {
  padding-bottom: 30px;
}
a,
button,
input,
textarea,
select {
  -webkit-tap-highlight-color: transparent;
}
@media (max-width: 800px) {
  .hero {
    min-height: 0;
  }
  .hero-grid {
    min-height: 0;
    gap: 0;
  }
  .hero-art {
    height: 460px;
  }
  .hero-art img {
    height: 445px;
  }
  .hero-art:before {
    width: 280px;
    height: 280px;
  }
  .hero-label {
    bottom: 2px;
    left: 0;
    right: 0;
  }
  .hero-label strong {
    font-size: 18px;
  }
  .hero-label small {
    font-size: 12px;
  }
  .hero-facts {
    margin-top: 27px;
    gap: 24px;
    padding-top: 20px;
  }
  .hero {
    padding-bottom: 35px;
  }
  .features {
    grid-template-columns: 1fr 1fr;
  }
  .comparison-head {
    display: block;
  }
  .comparison-head h3 {
    margin-bottom: 5px;
  }
  .comparison-head span {
    display: block;
    margin-bottom: 18px;
  }
  .option-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .tabs {
    flex-wrap: wrap;
    gap: 8px;
  }
  .tab {
    padding: 10px 14px;
    min-height: 46px;
    font-size: 14px;
  }
  .panel {
    padding: 20px;
  }
  .model-pic img {
    height: 280px;
  }
  .model-pic {
    min-height: 280px;
  }
  .contact-grid {
    gap: 35px;
  }
  .footer {
    padding-bottom: 100px;
  }
  .float {
    bottom: calc(12px + env(safe-area-inset-bottom));
  }
  .head h2 {
    font-size: 34px;
  }
  .section {
    padding: 70px 0;
  }
  .contact h2 {
    font-size: 38px;
  }
  .flow {
    gap: 30px;
  }
  .hero h1 {
    font-size: 48px;
  }
  .hero p {
    font-size: 17px;
  }
}
@media (max-width: 400px) {
  .wrap {
    padding: 0 16px;
  }
  .hero h1 {
    font-size: 43px;
  }
  .hero-facts {
    gap: 20px;
  }
  .hero-facts b {
    font-size: 16px;
  }
  .features {
    grid-template-columns: 1fr;
  }
  .actions {
    gap: 9px;
  }
  .btn {
    padding: 12px 17px;
  }
  .panel h3 {
    font-size: 28px;
  }
  .spec strong {
    font-size: 16px;
  }
  .screen {
    padding: 18px;
  }
  .head h2 {
    font-size: 31px;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *:before,
  *:after {
    transition: none !important;
    animation: none !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}
.brand-logo {
  width: 124px;
  height: auto;
  display: block;
  object-fit: contain;
}
.demo-context {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 22px 0 12px;
}
.demo-context small {
  display: block;
  margin-left: auto;
  color: #8ea7ba;
  font-size: 12px;
}
.demo-dot {
  width: 8px;
  height: 8px;
  background: #65e2ff;
  border-radius: 50%;
  box-shadow: 0 0 14px #65e2ff;
}
.user-avatar {
  background: #243f5a;
  color: #c4d7e5;
  font-size: 12px;
}
.user-bubble {
  background: #65e2ff18;
  border-color: #65e2ff45;
}
.answer {
  line-height: 1.65;
}
.demo-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 20px 54px;
}
.demo-tags span {
  color: #8feaff;
  border: 1px solid #65e2ff35;
  background: #65e2ff0b;
  border-radius: 99px;
  padding: 4px 9px;
  font-size: 12px;
}
.demo-actions {
  display: flex;
  gap: 8px;
  margin: 0 0 20px 54px;
}
.demo-action {
  border: 1px solid #ffffff25;
  background: #ffffff09;
  color: #b3c4d4;
  border-radius: 99px;
  padding: 8px 12px;
  font-size: 13px;
}
.demo-action.active,
.demo-action:hover {
  color: #091423;
  background: #65e2ff;
  border-color: #65e2ff;
}
.hero-art:after {
  content: '内容演示';
  position: absolute;
  top: 17%;
  right: 7%;
  border: 1px solid #65e2ff55;
  color: #9eeeff;
  padding: 7px 10px;
  border-radius: 8px;
  background: #65e2ff0c;
  font-size: 11px;
  letter-spacing: 0.12em;
}
.hero-art img {
  z-index: 1;
}
@media (max-width: 800px) {
  .brand-logo {
    width: 116px;
  }
  .demo-context {
    align-items: flex-start;
    flex-wrap: wrap;
  }
  .demo-context small {
    width: 100%;
    margin-left: 16px;
  }
  .demo-tags,
  .demo-actions {
    margin-left: 0;
  }
  .demo-actions {
    flex-wrap: wrap;
  }
  .hero-art:after {
    right: 0;
    top: 8%;
  }
}

/* Refined for the latest content review: compact hero crop, shorter interaction demo,
   full-bleed product renders, and PPT-inspired circular line icons. */
.brand-logo {
  width: 106px;
}
.hero-art {
  height: 560px;
  min-height: 0;
}
.hero-art img {
  width: 100%;
  height: 560px;
  max-height: none;
  object-fit: cover;
  object-position: 66% center;
  border-radius: 26px;
}
.flow {
  gap: 42px;
  align-items: start;
}
.screen {
  padding: 20px;
}
.demo-context {
  margin: 10px 0 8px;
}
.chat {
  margin: 12px 0;
}
.demo-tags {
  margin-bottom: 12px;
}
.demo-actions {
  margin-bottom: 12px;
}
.step {
  padding: 10px 12px;
}
.step small {
  font-size: 14px;
}
.model-pic {
  min-height: 0;
  padding: 0;
  background: #e3e7ec;
  overflow: hidden;
  align-items: stretch;
}
.model-pic img {
  display: block;
  width: 100%;
  height: auto;
  max-width: none;
  max-height: none;
  object-fit: contain;
}
.feature-icon {
  display: block;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: #edf3ff;
  object-fit: contain;
  overflow: hidden;
}
@media (max-width: 800px) {
  .brand-logo {
    width: 100px;
  }
  .hero-art {
    height: 420px;
  }
  .hero-art img {
    height: 420px;
    object-position: 66% center;
  }
  .flow {
    gap: 24px;
  }
  .model-pic img {
    width: 100%;
    height: auto;
    max-height: none;
  }
}