:root {
  --source-accent: #7050f0;
  --source-second: #503030;
  --bg: #1a192e;
  --panel: rgba(31, 31, 57, .78);
  --ink: #f7f8fb;
  --muted: #b6beca;
  --accent: #7050f0;
  --second: #503030;
  --line: rgba(255, 255, 255, .16);
  --radius: 12px;
  --stroke: 1px;
  --shadow: 0 26px 70px rgba(0, 0, 0, .35);
}

html { scroll-behavior: smooth; }

* { box-sizing: border-box; }

body {
  margin: 0;
  background: linear-gradient(180deg, color-mix(in srgb, var(--source-accent) 4%, var(--bg)), var(--bg) 28%, color-mix(in srgb, var(--source-second) 4%, var(--bg)));
  color: var(--ink);
  font-family: Arial, "Microsoft YaHei", sans-serif;
  line-height: 1.65;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font: inherit; color: inherit; }

.container {
  width: min(1200px, calc(100% - 48px));
  margin-inline: auto;
}

/* =================== Header =================== */
.site-header {
  height: 70px;
  display: flex;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 30;
  background: linear-gradient(105deg, color-mix(in srgb, var(--bg) 92%, var(--source-accent)), color-mix(in srgb, var(--bg) 90%, transparent), color-mix(in srgb, var(--bg) 88%, var(--source-second)));
  border-bottom: var(--stroke) solid var(--line);
  backdrop-filter: blur(16px) saturate(145%);
  -webkit-backdrop-filter: blur(16px) saturate(145%);
}

.header-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 12px;
}

.brand {
  justify-self: start;
  display: flex;
  align-items: center;
  gap: 11px;
  font-size: 17px;
  font-weight: 900;
  white-space: nowrap;
}
.brand img {
  width: 36px;
  height: 36px;
  object-fit: cover;
  border-radius: 50%;
  box-shadow: 0 8px 24px color-mix(in srgb, var(--source-accent) 24%, transparent);
}

.main-nav {
  justify-self: center;
  display: flex;
  align-items: center;
  gap: 2px;
  font-size: 13px;
}
.main-nav a {
  padding: 7px;
  border-bottom: 1px solid transparent;
  white-space: nowrap;
  transition: color .2s, border-color .2s;
}
.main-nav a:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.header-actions {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-primary {
  padding: 9px 15px;
  background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--second) 76%, var(--accent)));
  color: #fff;
  font-weight: 800;
  border-radius: calc(var(--radius) / 2);
  box-shadow: 0 10px 26px color-mix(in srgb, var(--accent) 24%, transparent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: transform .2s, box-shadow .2s;
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 32px color-mix(in srgb, var(--accent) 32%, transparent);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  font-weight: 900;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--panel) 72%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: background .2s, border-color .2s;
}
.btn-ghost:hover {
  background: color-mix(in srgb, var(--panel) 88%, transparent);
  border-color: var(--accent);
}

.btn-lg { padding: 12px 18px; }

.btn-alt {
  background: linear-gradient(135deg, color-mix(in srgb, var(--second) 80%, var(--accent)), color-mix(in srgb, var(--accent) 60%, var(--second)));
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 18px;
  color: var(--ink);
}

/* =================== Hero =================== */
.hero {
  height: calc(100svh - 70px);
  min-height: 610px;
  max-height: 840px;
  padding: 44px 0;
  display: flex;
  align-items: center;
  overflow: hidden;
  position: relative;
  isolation: isolate;
  background: linear-gradient(108deg, color-mix(in srgb, var(--source-accent) 12%, var(--bg)) 0%, var(--bg) 48%, color-mix(in srgb, var(--source-second) 9%, var(--bg)) 100%);
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: .28;
  background: repeating-linear-gradient(90deg, transparent 0 63px, color-mix(in srgb, var(--source-accent) 9%, transparent) 64px);
}
.hero::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  z-index: 5;
  background: linear-gradient(90deg, transparent, var(--source-accent), var(--source-second), transparent);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, .88fr);
  gap: clamp(42px, 7vw, 96px);
  align-items: center;
  width: min(1200px, calc(100% - 48px));
  margin-inline: auto;
}

.hero-text { position: relative; z-index: 2; min-width: 0; }

.eyebrow {
  display: inline-flex;
  width: max-content;
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 2px;
  padding: 0;
  border: 0;
  border-radius: calc(var(--radius) / 2);
  background: color-mix(in srgb, var(--panel) 66%, transparent);
  backdrop-filter: blur(12px);
}

.hero h1 {
  font-size: clamp(62px, 7vw, 86px);
  line-height: .94;
  margin: 0;
  font-weight: 900;
  letter-spacing: 0;
}

.hero-desc {
  max-width: 605px;
  color: var(--muted);
  font-size: 17px;
  margin: 18px 0 22px;
}

.hero-cta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.hero-tags {
  display: flex;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 12px;
}
.hero-tags li {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 5px 8px;
  border: 1px solid color-mix(in srgb, var(--source-accent) 16%, var(--line));
  background: color-mix(in srgb, var(--panel) 55%, transparent);
  backdrop-filter: blur(12px);
}
.hero-tags i { color: var(--accent); }

.hero-badge {
  position: absolute;
  top: -42px;
  left: -26px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--accent);
  font-size: 11px;
}
.hero-badge > span {
  width: 38px;
  height: 1px;
  background: linear-gradient(90deg, var(--source-accent), var(--source-second));
}
.hero-badge > i { font-size: 16px; }
.hero-badge > b { font-weight: 800; }

/* Hero 视觉区 */
.hero-visual {
  position: relative;
  min-width: 0;
  height: 520px;
  display: grid;
  place-items: center;
}
.hero-visual::before {
  content: '';
  position: absolute;
  inset: 7% -5%;
  border: 1px solid color-mix(in srgb, var(--source-accent) 22%, transparent);
  background: repeating-linear-gradient(90deg, transparent 0 39px, color-mix(in srgb, var(--source-second) 8%, transparent) 40px);
  opacity: .62;
  pointer-events: none;
}

.hero-floats {
  position: absolute;
  inset: 0;
  z-index: 6;
  pointer-events: none;
  font-size: 10px;
  letter-spacing: 0;
}
.float-card {
  position: absolute;
  border: 1px solid color-mix(in srgb, var(--source-accent) 24%, var(--line));
  background: linear-gradient(135deg, color-mix(in srgb, var(--panel) 86%, var(--source-accent) 14%), color-mix(in srgb, var(--panel) 72%, transparent));
  box-shadow: 0 12px 34px color-mix(in srgb, var(--source-second) 14%, transparent);
  backdrop-filter: blur(16px) saturate(145%);
  -webkit-backdrop-filter: blur(16px) saturate(145%);
}
.float-thinking {
  right: -12px;
  top: 13%;
  display: grid;
  gap: 7px;
  padding: 10px;
}
.float-thinking span {
  padding: 5px 8px;
  border-left: 2px solid var(--accent);
  background: color-mix(in srgb, var(--source-accent) 8%, transparent);
}

.hero-preview {
  position: relative;
  min-width: 0;
  z-index: 2;
}
.preview-frame {
  width: 100%;
  padding: 14px;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
}
.preview-frame header {
  display: flex;
  gap: 6px;
  align-items: center;
  padding-bottom: 12px;
}
.preview-frame header i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}
.preview-frame header span {
  margin-left: auto;
  font-size: 10px;
  color: var(--muted);
}
.preview-frame footer {
  padding-top: 10px;
  font-size: 9px;
  letter-spacing: 2px;
}
.preview-img {
  position: relative;
}
.preview-img img {
  width: 100%;
  height: 460px;
  object-fit: cover;
  object-position: top;
  border: var(--stroke) solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.preview-img > span {
  position: absolute;
  right: 12px;
  bottom: 12px;
  padding: 7px 11px;
  background: linear-gradient(135deg, var(--accent), var(--second));
  color: #fff;
  font-size: 11px;
  font-weight: 800;
  border-radius: calc(var(--radius) / 2);
  backdrop-filter: blur(10px);
}

/* =================== Sections 通用 =================== */
.section { padding: 112px 0; }

.section-screens,
.section-faq {
  background: color-mix(in srgb, var(--accent) 5%, var(--bg));
}
.section-caps {
  background: color-mix(in srgb, var(--second) 4%, var(--bg));
}

.section-head {
  position: relative;
  margin-bottom: 58px;
  outline: 1px solid var(--line);
  outline-offset: 10px;
}
.section-head-grid {
  max-width: none;
  display: grid;
  grid-template-columns: 1fr minmax(320px, .78fr);
  gap: 64px;
  align-items: end;
}
.section-head-left, .section-head-right { min-width: 0; }
.section-head-right {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.section-title {
  font-size: 42px;
  line-height: 1.15;
  font-weight: 650;
  margin: 0;
}

.section-desc {
  max-width: 680px;
  color: var(--muted);
  font-size: 13px;
  margin: 13px 0 0;
}

.section-mark {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 16px;
  color: var(--accent);
  font-size: 10px;
}
.section-mark i {
  display: block;
  width: 28px;
  height: 1px;
  background: var(--accent);
}
.section-mark b {
  min-width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  font-weight: 800;
}

.section-foot {
  margin: 18px 0 0;
  color: var(--accent);
  font-size: 10px;
  letter-spacing: 2px;
}

/* =================== 产品画面 =================== */
.screens-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}
.screen-card { min-width: 0; }
.screen-img {
  height: 440px;
  overflow: hidden;
  background: linear-gradient(145deg, color-mix(in srgb, var(--panel) 84%, var(--source-accent) 16%), var(--panel));
  border: var(--stroke) solid color-mix(in srgb, var(--source-accent) 32%, var(--line));
  border-radius: var(--radius);
  position: relative;
}
.screen-img::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid color-mix(in srgb, var(--source-second) 18%, transparent);
  pointer-events: none;
}
.screen-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
}
.screen-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}
.screen-meta span {
  font-size: 10px;
  color: var(--accent);
}
.screen-meta strong { font-size: 12px; }

/* =================== AI 能力 =================== */
.caps-block { position: relative; }
.caps-label {
  color: var(--accent);
  font-size: 11px;
  letter-spacing: 1px;
}
.caps-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 14px;
}
.cap-card {
  display: grid;
  grid-template-columns: 58px 1fr;
  column-gap: 14px;
  min-height: 247px;
  padding: 26px;
  background: linear-gradient(145deg, color-mix(in srgb, var(--panel) 88%, var(--source-accent) 12%), color-mix(in srgb, var(--panel) 74%, transparent));
  border: var(--stroke) solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  position: relative;
  backdrop-filter: blur(12px) saturate(135%);
  -webkit-backdrop-filter: blur(12px) saturate(135%);
  transition: transform .25s, border-color .25s;
}
.cap-card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--accent) 50%, var(--line));
}
.cap-card > i {
  grid-row: 1 / 4;
  width: 47px;
  height: 47px;
  display: grid;
  place-items: center;
  color: var(--accent);
  font-size: 23px;
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) / 2);
  background: linear-gradient(135deg, color-mix(in srgb, var(--source-accent) 16%, transparent), color-mix(in srgb, var(--source-second) 10%, transparent));
}
.cap-num {
  position: absolute;
  right: 18px;
  top: 15px;
  color: var(--muted);
  font-size: 11px;
}
.cap-card h3 {
  font-size: 20px;
  font-weight: 800;
  margin: 0 0 8px;
}
.cap-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

/* =================== FAQ =================== */
.faq-block { position: relative; }
.faq-deco {
  position: absolute;
  left: 50%;
  top: -18px;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 8px;
  color: color-mix(in srgb, var(--accent) 42%, transparent);
  font-size: 10px;
  pointer-events: none;
}
.faq-deco i { font-size: 18px; }

.faq-list {
  width: min(100%, 970px);
  margin-inline: auto;
  padding: 14px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel) 55%, transparent);
  border-radius: var(--radius);
}
.faq-item {
  margin: 0 0 17px;
  padding: 0 19px;
  background: linear-gradient(145deg, color-mix(in srgb, var(--panel) 90%, var(--source-accent) 10%), color-mix(in srgb, var(--panel) 78%, transparent));
  border: var(--stroke) solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px) saturate(135%);
  -webkit-backdrop-filter: blur(18px) saturate(135%);
}
.faq-item:last-child { margin-bottom: 0; }
.faq-item button {
  width: 100%;
  display: grid;
  grid-template-columns: 36px 1fr 30px;
  gap: 10px;
  align-items: center;
  text-align: left;
  border: 0;
  background: transparent;
  padding: 20px 0;
  cursor: pointer;
}
.faq-item button span { color: var(--accent); font-size: 10px; }
.faq-item button strong { font-size: 14px; font-weight: 800; }
.faq-item button i {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, color-mix(in srgb, var(--source-accent) 14%, transparent), color-mix(in srgb, var(--source-second) 10%, transparent));
  border-radius: 50%;
  transition: transform .25s;
}
.faq-answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows .28s;
}
.faq-answer p {
  overflow: hidden;
  color: var(--muted);
  margin: 0;
  max-width: 720px;
  font-size: 13px;
}
.faq-item.is-open .faq-answer { grid-template-rows: 1fr; }
.faq-item.is-open .faq-answer p { margin-bottom: 20px; }
.faq-item.is-open button i { transform: rotate(45deg); }

/* =================== 评价 =================== */
.reviews-grid {
  columns: 3;
  column-gap: 14px;
}
.review-card {
  break-inside: avoid;
  margin: 0 0 14px;
  padding: 26px;
  background: linear-gradient(155deg, color-mix(in srgb, var(--panel) 90%, var(--source-second) 10%), color-mix(in srgb, var(--panel) 76%, transparent));
  border: var(--stroke) solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  position: relative;
  backdrop-filter: blur(18px) saturate(135%);
  -webkit-backdrop-filter: blur(18px) saturate(135%);
}
.review-stars {
  display: flex;
  gap: 2px;
  color: var(--accent);
  font-size: 12px;
}
.review-card blockquote {
  margin: 17px 0 22px;
  font-size: 15px;
}
.review-card footer {
  display: flex;
  align-items: center;
  gap: 10px;
  border-top: 1px solid var(--line);
  padding-top: 14px;
}
.avatar {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--second));
  color: #fff;
  border-radius: 6px;
  font-weight: 900;
  flex-shrink: 0;
}
.review-card footer p {
  display: grid;
  flex: 1;
  margin: 0;
}
.review-card footer p strong { font-size: 13px; }
.time { font-size: 10px; color: var(--muted); }
.review-card footer > i { color: var(--muted); font-size: 18px; }
.review-tag {
  width: max-content;
  margin-top: 12px;
  padding: 3px 8px;
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  color: var(--accent);
  font-size: 10px;
  border-radius: 999px;
}

/* =================== Footer =================== */
.site-footer {
  padding: 56px 0 22px;
  background: color-mix(in srgb, var(--ink) 91%, var(--accent));
  color: var(--bg);
}
.footer-top {
  display: grid;
  grid-template-columns: 1fr .7fr auto;
  gap: 36px;
  align-items: start;
  padding-bottom: 34px;
  border-bottom: 1px solid color-mix(in srgb, var(--bg) 20%, transparent);
}
.footer-top .brand { font-size: 20px; }
.footer-top .brand img {
  width: 42px;
  height: 42px;
  border-radius: calc(var(--radius) / 2);
}
.footer-desc {
  max-width: 470px;
  color: color-mix(in srgb, var(--bg) 68%, transparent);
  font-size: 13px;
  margin: 12px 0 0;
}
.footer-nav {
  display: grid;
  gap: 7px;
  font-size: 12px;
}
.footer-nav a:hover { color: var(--accent); }
.footer-social {
  display: flex;
  gap: 8px;
  margin-top: 14px;
}
.footer-social a {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--bg) 28%, transparent);
  border-radius: 4px;
  transition: background .2s, border-color .2s;
}
.footer-social a:hover {
  background: color-mix(in srgb, var(--bg) 12%, transparent);
  border-color: var(--bg);
}
.footer-slogan {
  align-self: end;
  font-size: 11px;
  letter-spacing: 2px;
  color: color-mix(in srgb, var(--bg) 60%, transparent);
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding-top: 18px;
  color: color-mix(in srgb, var(--bg) 58%, transparent);
  font-size: 10px;
  flex-wrap: wrap;
}
.footer-bottom a:hover { color: var(--bg); }

/* =================== 滚动渐入 =================== */
.fade-up {
  opacity: 1;
  transform: none;
  transition: opacity .6s ease, transform .6s ease;
}
.js-on .fade-up {
  opacity: 0;
  transform: translateY(24px);
}
.js-on .fade-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* =================== 响应式 =================== */
@media (max-width: 700px) {
  .container { width: min(100% - 28px, 1200px); }
  .site-header { height: 66px; }
  .header-inner { grid-template-columns: 1fr auto; gap: 10px; }

  .main-nav {
    display: none;
    position: absolute;
    left: 14px;
    right: 14px;
    top: 72px;
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    background: var(--bg);
    color: var(--ink);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
  }
  .main-nav.is-open { display: flex !important; }
  .main-nav a { padding: 10px; border-bottom: 1px solid var(--line); }

  .btn-primary { min-height: 40px; padding: 8px 14px; font-size: 13px; }
  .menu-toggle { display: none; }

  .hero {
    height: auto;
    min-height: calc(100svh - 66px);
    max-height: none;
    padding: 68px 0 34px;
  }
  .hero-grid { grid-template-columns: 1fr; gap: 30px; }
  .hero h1 { font-size: 42px; }
  .hero-tags { display: none; }
  .hero-badge { top: -34px; left: 0; right: auto; bottom: auto; transform: none; }

  .hero-visual { height: 290px; }
  .hero-floats { display: none; }
  .preview-img img { height: 250px !important; max-height: 250px; }

  .hero-cta { width: 100%; }
  .hero-cta a { width: 100%; justify-content: center; }

  .section { padding: 74px 0; }
  .section-head-grid { grid-template-columns: 1fr; gap: 14px; }
  .section-head-right { align-items: flex-start; }
  .section-title { font-size: 32px; }

  .caps-grid { grid-template-columns: 1fr; }
  .cap-card { min-height: 210px; transform: none !important; }

  .screens-row {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    gap: 14px;
    padding-bottom: 14px;
  }
  .screen-card { flex: 0 0 78%; transform: none !important; }
  .screen-img { height: 420px !important; }

  .reviews-grid { columns: 1; }
  .review-card { transform: none !important; }

  .faq-deco { display: none; }
  .faq-list { display: block !important; }

  .footer-top { grid-template-columns: 1fr !important; }
  .footer-bottom { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .fade-up { opacity: 1 !important; transform: none !important; }
}