@charset "UTF-8";

:root {
  --bg: #131A22;
  --bg-2: #18202A;
  --panel: #1F2937;
  --panel-2: #232F3E;
  --line: #2E3B4C;
  --ink: #EDF2F7;
  --muted: #9AAABD;
  --accent: #4ADE80;
  --accent-deep: #15803D;
  --shell: 1120px;
  --header-height: 70px;
  --mono: "JetBrains Mono", Consolas, "Courier New", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 18px); }
body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  overflow-wrap: anywhere;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
svg { display: block; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
.page-shell { width: min(calc(100% - 48px), var(--shell)); margin: 0 auto; }
.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2.4px;
  line-height: 1.4;
}
.eyebrow::before { width: 16px; height: 2px; content: ""; background: currentColor; }
.section-heading-center { text-align: center; }
.section-heading-center .eyebrow { justify-content: center; }
.section-heading-center > p:last-child { margin-left: auto; margin-right: auto; }

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  border-bottom: 1px solid var(--line);
  background: rgba(19, 26, 34, .95);
  backdrop-filter: blur(14px);
}
.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(calc(100% - 48px), var(--shell));
  min-height: var(--header-height);
  margin: 0 auto;
  gap: 20px;
}
.brand { display: inline-flex; align-items: center; flex: 0 1 auto; min-width: 0; gap: 10px; font-size: 20px; font-weight: 900; letter-spacing: .2px; }
.brand span { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.brand img { width: 42px; height: 34px; border: 1px solid var(--line); border-radius: 10px; object-fit: contain; background: #18202A; }
.brand-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 19px;
  height: 19px;
  border-radius: 6px;
  background: var(--accent);
  color: #08210F;
  font-size: 10px;
  font-style: normal;
  font-weight: 900;
}
.primary-nav { margin-left: auto; }
.primary-nav ul { display: flex; align-items: center; gap: clamp(12px, 1.9vw, 26px); padding: 0; margin: 0; list-style: none; }
.primary-nav a { display: block; padding: 7px 0; border-bottom: 2px solid transparent; color: #A6B6C8; font-size: 13px; font-weight: 700; }
.primary-nav a:hover { border-bottom-color: var(--accent); color: #fff; }
.nav-actions { display: flex; align-items: center; flex: none; gap: 10px; }
.nav-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  gap: 8px;
  padding: 0 18px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  background: var(--accent);
  color: #08210F;
  font-size: 13px;
  font-weight: 900;
  white-space: nowrap;
  transition: background .18s ease, color .18s ease;
}
.nav-download:hover { background: transparent; color: var(--accent); }
.nav-download svg, .button svg { width: 18px; height: 18px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.menu-toggle { display: none; width: 42px; height: 42px; padding: 0; border: 1px solid var(--line); border-radius: 10px; background: transparent; cursor: pointer; }
.menu-toggle span { display: block; width: 18px; height: 2px; margin: 5px auto; background: var(--ink); transition: transform .18s ease; }
.menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }

/* hero */
.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(520px 340px at 8% 4%, rgba(74, 222, 128, .13), transparent 70%),
    radial-gradient(600px 380px at 96% 100%, rgba(74, 222, 128, .08), transparent 72%),
    linear-gradient(170deg, #1B2532 0%, var(--bg) 62%);
}
.hero::before {
  position: absolute;
  inset: 0;
  content: "";
  background-image: radial-gradient(rgba(74, 222, 128, .18) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: linear-gradient(160deg, #000, transparent 62%);
  pointer-events: none;
}
.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
  align-items: start;
  gap: clamp(24px, 4vw, 52px);
  padding: 54px 0 60px;
}
.hero-copy { position: relative; min-width: 0; padding-bottom: 128px; }
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  color: #A6B6C8;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 1.6px;
}
.hero-kicker b {
  padding: 3px 8px;
  border-radius: 5px;
  background: rgba(74, 222, 128, .16);
  color: var(--accent);
  font-size: 9.5px;
  font-weight: 900;
  letter-spacing: 1.4px;
}
.hero h1 {
  margin: 0;
  font-size: clamp(40px, 5.6vw, 70px);
  font-weight: 900;
  letter-spacing: -1.5px;
  line-height: 1.06;
}
.hero-subtitle {
  margin: 16px 0 0;
  color: var(--accent);
  font-size: clamp(18px, 2.1vw, 24px);
  font-weight: 800;
  line-height: 1.4;
}
.hero-lead { max-width: 460px; margin: 13px 0 0; color: var(--muted); font-size: 14.5px; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 18px; margin-top: 24px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  gap: 14px;
  padding: 0 28px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 900;
  transition: transform .18s ease, background .18s ease, color .18s ease;
}
.button-primary { background: var(--accent); color: #08210F; box-shadow: 0 14px 30px rgba(74, 222, 128, .2); }
.button-primary:hover { background: #86EFAC; transform: translateY(-2px); }
.button-large { min-height: 54px; padding: 0 34px; font-size: 15px; }
.text-link { color: #C3D2E1; border-bottom: 1px dashed #3A4A5E; font-size: 13px; font-weight: 800; }
.text-link span { display: inline-block; margin-left: 5px; color: var(--accent); }

.robot-mark { position: absolute; left: 0; bottom: 0; width: 108px; height: 108px; }
.robot-face {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  border: 2px solid var(--accent);
  border-radius: 50%;
  background: radial-gradient(circle at 34% 28%, #2B3B4C, #16202B 72%);
  box-shadow: 0 0 0 8px rgba(74, 222, 128, .08), 0 0 32px rgba(74, 222, 128, .22);
}
.robot-face::before {
  position: absolute;
  top: -13px;
  left: 50%;
  width: 2px;
  height: 12px;
  content: "";
  background: var(--accent);
  transform: translateX(-50%);
}
.robot-face::after {
  position: absolute;
  top: -20px;
  left: 50%;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  content: "";
  background: var(--accent);
  transform: translateX(-50%);
}
.robot-face i { width: 15px; height: 15px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px rgba(74, 222, 128, .9); }
.robot-shadow { position: absolute; left: 12px; bottom: -14px; width: 84px; height: 8px; border-radius: 50%; background: rgba(74, 222, 128, .16); filter: blur(4px); }

.chat-panel { min-width: 0; padding: 20px 20px 16px; border: 1px solid var(--line); border-radius: 16px; background: linear-gradient(165deg, rgba(74, 222, 128, .07), transparent 46%), var(--panel); box-shadow: 0 24px 48px rgba(0, 0, 0, .34); }
.chat-head { display: flex; align-items: center; justify-content: space-between; padding: 0 0 12px; margin: 0 0 12px; border-bottom: 1px solid var(--line); color: #A6B6C8; font-family: var(--mono); font-size: 11px; letter-spacing: 1.6px; }
.chat-head b { display: inline-flex; align-items: center; gap: 6px; color: var(--accent); font-weight: 700; }
.chat-head b::before { width: 7px; height: 7px; border-radius: 50%; content: ""; background: var(--accent); box-shadow: 0 0 8px var(--accent); }
.chat-lines { padding: 0; margin: 0; list-style: none; }
.chat-lines li { position: relative; max-width: 88%; padding: 10px 14px 24px; margin-bottom: 10px; border-radius: 12px; background: var(--panel-2); }
.chat-lines li b { display: block; margin-bottom: 3px; font-size: 10.5px; letter-spacing: .6px; color: #8FA2B6; font-weight: 700; }
.chat-lines li p { margin: 0; font-size: 13px; line-height: 1.65; }
.chat-lines li time { position: absolute; right: 12px; bottom: 7px; color: #74879B; font-family: var(--mono); font-size: 9.5px; }
.chat-lines .from-bot { margin-left: auto; background: rgba(74, 222, 128, .12); border: 1px solid rgba(74, 222, 128, .28); }
.chat-lines .from-bot b { color: var(--accent); }
.source-lights { display: flex; flex-wrap: wrap; gap: 8px; padding: 12px 0 2px; margin: 4px 0 0; border-top: 1px solid var(--line); list-style: none; }
.source-lights li { display: inline-flex; align-items: center; gap: 7px; padding: 5px 11px; border: 1px solid var(--line); border-radius: 999px; color: #A6B6C8; font-size: 11px; }
.source-lights i { width: 7px; height: 7px; border-radius: 50%; background: #64748B; }
.source-lights .is-good i { background: var(--accent); box-shadow: 0 0 8px var(--accent); }
.source-lights .is-mid i { background: #FBBF24; }
.source-lights .is-slow i { background: #F87171; }

/* features */
.features { padding: 74px 0 78px; border-bottom: 1px solid var(--line); background: var(--bg-2); }
.section-heading { margin-bottom: 30px; }
.section-heading h2, .download h2 { margin: 0; font-size: clamp(23px, 2.7vw, 33px); font-weight: 900; letter-spacing: -.5px; line-height: 1.34; }
.section-heading > p:last-child { max-width: 620px; margin: 12px 0 0; color: var(--muted); font-size: 14px; }
.feature-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.feature-card { display: grid; grid-template-columns: 54px minmax(0, 1fr); align-items: start; gap: 4px 16px; padding: 22px 22px 24px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); }
.feature-no { display: flex; align-items: center; justify-content: center; width: 46px; height: 46px; border-radius: 12px; background: rgba(74, 222, 128, .1); color: var(--accent); font-family: var(--mono); font-size: 13px; font-weight: 700; }
.feature-card h3 { margin: 6px 0 6px; font-size: 17px; font-weight: 900; }
.feature-card p { grid-column: 2; margin: 0; color: var(--muted); font-size: 12.8px; line-height: 1.82; }

/* shots */
.shots { padding: 74px 0 80px; }
.shot-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.shot-card { display: flex; flex-direction: column; margin: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 10px; background: var(--panel); }
.shot-card img { width: 100%; height: 340px; object-fit: cover; object-position: center top; }
.shot-card figcaption { border-top: 1px solid var(--line); padding: 10px 12px 12px; }
.shot-card figcaption b { display: block; color: var(--accent); font-family: var(--mono); font-size: 10px; }
.shot-card figcaption span { display: block; font-size: 13px; font-weight: 800; line-height: 1.4; }
.shot-card figcaption small { display: block; color: var(--muted); font-size: 10.5px; font-weight: 500; }

/* faq */
.faq { padding: 72px 0 78px; border-top: 1px solid var(--line); background: var(--bg-2); }
.faq-list { max-width: 880px; margin: 0 auto; border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 17px 4px; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary h3 { margin: 0; font-size: 15.5px; font-weight: 900; }
.faq-list summary i { position: relative; flex: none; width: 22px; height: 22px; border: 1px solid var(--line); border-radius: 50%; }
.faq-list summary i::before,
.faq-list summary i::after { position: absolute; top: 50%; left: 50%; width: 9px; height: 1.5px; content: ""; background: var(--accent); transform: translate(-50%, -50%); }
.faq-list summary i::after { transform: translate(-50%, -50%) rotate(90deg); transition: transform .2s ease; }
.faq-list details[open] summary i::after { transform: translate(-50%, -50%) rotate(0); }
.faq-list details p { padding: 0 32px 17px 4px; margin: 0; color: var(--muted); font-size: 13.5px; line-height: 1.86; }

/* reviews */
.reviews { padding: 74px 0 80px; }
.review-list { display: grid; grid-template-columns: 1fr; gap: 10px; padding: 0; margin: 0; list-style: none; counter-reset: review; }
.review-card { position: relative; padding: 16px 22px 17px 26px; border: 1px solid var(--line); border-radius: 10px; background: var(--panel); }
.review-card::before { position: absolute; top: 14px; left: 0; width: 3px; height: calc(100% - 28px); content: ""; background: linear-gradient(180deg, var(--accent), transparent); }
.review-meta { display: flex; align-items: baseline; gap: 14px; margin-bottom: 5px; }
.review-meta b { color: var(--accent); font-size: 13px; font-weight: 900; }
.review-meta time { color: #7E90A4; font-family: var(--mono); font-size: 10px; }
.review-card p { margin: 0; color: #BECBDA; font-size: 13px; line-height: 1.76; }

/* steps */
.steps { padding: 70px 0 76px; border-top: 1px solid var(--line); background: var(--bg-2); }
.step-list { position: relative; display: grid; gap: 6px; padding: 0 0 0 34px; margin: 0; list-style: none; }
.step-list::before { position: absolute; top: 8px; bottom: 8px; left: 11px; width: 2px; content: ""; background: linear-gradient(180deg, var(--accent), rgba(74, 222, 128, .1)); }
.step-list li { position: relative; padding: 12px 18px 14px; border: 1px solid var(--line); border-radius: 10px; background: var(--panel); }
.step-list li::before { position: absolute; top: 24px; left: -29px; width: 10px; height: 10px; border: 2px solid var(--accent); border-radius: 50%; content: ""; background: var(--bg-2); }
.step-list span { color: var(--accent); font-family: var(--mono); font-size: 11px; font-weight: 700; letter-spacing: 1.4px; }
.step-list h3 { margin: 3px 0 4px; font-size: 16px; font-weight: 900; }
.step-list p { margin: 0; color: var(--muted); font-size: 12.8px; line-height: 1.72; }

/* download */
.download { padding: 30px 0; }
.download-inner {
  padding: 52px clamp(24px, 6vw, 64px) 46px;
  border: 1px solid #34604A;
  border-radius: 16px;
  text-align: center;
  background:
    radial-gradient(420px 240px at 50% 0%, rgba(74, 222, 128, .2), transparent 72%),
    linear-gradient(150deg, #22362B, #1B2A22 78%);
}
.download-inner .eyebrow { justify-content: center; }
.download h2 { max-width: 720px; margin: 0 auto; }
.download-inner > p { max-width: 520px; margin: 13px auto 0; color: #A7C2B3; font-size: 14px; }
.download-inner .button { margin-top: 24px; }
.download-notes { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 24px; padding: 22px 0 0; margin: 24px 0 0; border-top: 1px solid rgba(74, 222, 128, .2); list-style: none; }
.download-notes li { color: #9CC2A9; font-family: var(--mono); font-size: 11px; }

/* footer */
.site-footer { padding: 42px 0 50px; border-top: 1px solid var(--line); }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 18px 40px; align-items: start; }
.footer-brand strong { font-size: 18px; font-weight: 900; }
.footer-brand p { margin: 4px 0 0; color: var(--muted); font-size: 12px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 8px 22px; }
.footer-nav a { color: #B4C3D3; font-size: 12px; }
.footer-nav a:hover { color: var(--accent); }
.footer-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 20px; margin-top: 22px; padding-top: 17px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.footer-meta p { margin: 0; }
.footer-meta a { color: var(--muted); }
.disclaimer { grid-column: 1 / -1; margin: 0; color: #7E90A4; font-size: 11.5px; line-height: 1.8; }

/* responsive */
@media (max-width: 1000px) {
  .hero h1 { font-size: clamp(34px, 5vw, 52px); }
  .shot-card img { height: 280px; }
}
@media (max-width: 900px) {
  .menu-toggle { display: block; }
  .primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    padding: 8px 24px 16px;
    border-bottom: 1px solid var(--line);
    background: var(--bg);
    box-shadow: 0 16px 26px rgba(0, 0, 0, .55);
  }
  .primary-nav.is-open { display: block; }
  .primary-nav ul { flex-direction: column; align-items: stretch; gap: 0; }
  .primary-nav a { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .hero-grid { grid-template-columns: 1fr; padding: 40px 0 46px; gap: 26px; }
  .hero-copy { padding-bottom: 0; padding-left: 110px; min-height: 100px; }
  .robot-mark { width: 90px; height: 90px; }
  .feature-grid { grid-template-columns: 1fr; }
  .shot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 768px) {
  .hero-copy { padding-left: 0; padding-top: 104px; }
  .robot-mark { width: 80px; height: 80px; top: 8px; }
  .chat-lines li { max-width: 100%; }
  .shot-card img { height: 300px; }
}
@media (max-width: 560px) {
  .page-shell, .nav-shell { width: calc(100% - 32px); }
  .nav-shell { gap: 10px; }
  .brand { font-size: 16px; gap: 7px; }
  .brand img { width: 32px; height: 28px; }
  .nav-download { min-height: 36px; padding: 0 10px; font-size: 11.5px; gap: 5px; }
  .nav-download svg { width: 14px; height: 14px; }
  .menu-toggle { width: 36px; height: 36px; }
  .hero h1 { font-size: clamp(32px, 9.6vw, 44px); }
  .hero-lead { font-size: 14px; }
  .hero-actions .button { width: 100%; }
  .feature-card { grid-template-columns: 44px minmax(0, 1fr); gap: 3px 12px; padding: 18px 16px 20px; }
  .feature-no { width: 38px; height: 38px; font-size: 11px; }
  .shot-grid { grid-template-columns: 1fr; }
  .shot-card img { height: 320px; }
  .review-card { padding: 14px 16px 15px 20px; }
  .review-meta { flex-wrap: wrap; gap: 4px 10px; }
  .step-list { padding-left: 26px; }
  .step-list li::before { left: -21px; }
  .step-list::before { left: 8px; }
  .footer-grid { grid-template-columns: 1fr; }
  .download-inner .button { width: 100%; }
}
@media (max-width: 380px) {
  .brand { font-size: 13.5px; gap: 5px; }
  .brand img { width: 28px; height: 24px; }
  .brand-tag { display: none; }
  .nav-actions { gap: 6px; }
  .nav-download { min-height: 32px; padding: 0 7px; font-size: 10px; gap: 3px; }
  .nav-download svg { width: 12px; height: 12px; }
  .menu-toggle { width: 32px; height: 32px; }
  .hero h1 { font-size: 30px; }
  .hero-subtitle { font-size: 16px; }
  .chat-panel { padding: 16px 14px 12px; }
  .source-lights li { padding: 4px 8px; font-size: 10px; }
  .shot-card img { height: 260px; }
}