@charset "UTF-8";

:root {
  --bg: #F1F7FC;
  --bg-2: #E7F1F9;
  --white: #FFFFFF;
  --navy: #12304A;
  --muted: #5E7A90;
  --blue: #2E9BE0;
  --blue-deep: #16639A;
  --orange: #F08A24;
  --line: #C9DDEA;
  --shell: 1160px;
  --header-height: 68px;
  --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(--navy);
  background: var(--bg);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  overflow-wrap: anywhere;
}
img { display: block; max-width: 100%; height: auto; }
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(--orange); outline-offset: 4px; }
.page-shell { width: min(calc(100% - 48px), var(--shell)); margin: 0 auto; }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; margin: 0 0 14px; color: var(--blue-deep); font-family: var(--mono); font-size: 11px; font-weight: 700; letter-spacing: 2.2px; line-height: 1.4; }
.eyebrow::before { width: 4px; height: 14px; content: ""; background: var(--orange); }

/* header */
.site-header { position: sticky; top: 0; z-index: 60; border-bottom: 1px solid var(--line); background: rgba(241, 247, 252, .96); backdrop-filter: blur(10px); }
.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: none; gap: 9px; font-size: 18px; font-weight: 900; letter-spacing: .2px; }
.brand img { width: 36px; height: 36px; border: 1px solid var(--line); border-radius: 8px; object-fit: contain; background: #fff; }
.primary-nav { margin-left: auto; }
.primary-nav ul { display: flex; align-items: center; gap: clamp(10px, 1.6vw, 22px); padding: 0; margin: 0; list-style: none; }
.primary-nav a { display: block; padding: 6px 0; border-bottom: 2px solid transparent; color: #4E6C83; font-size: 12.5px; font-weight: 700; }
.primary-nav a:hover { border-bottom-color: var(--blue); color: var(--navy); }
.nav-actions { display: flex; align-items: center; flex: none; gap: 10px; }
.nav-download { display: inline-flex; align-items: center; justify-content: center; min-height: 40px; gap: 7px; padding: 0 14px; border-radius: 4px; background: var(--blue); color: #fff; font-size: 12.5px; font-weight: 900; white-space: nowrap; transition: background .18s ease; }
.nav-download:hover { background: var(--blue-deep); }
.nav-download svg, .button svg { width: 17px; height: 17px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.menu-toggle { display: none; width: 40px; height: 40px; padding: 0; border: 1px solid var(--line); border-radius: 4px; background: transparent; cursor: pointer; }
.menu-toggle span { display: block; width: 17px; height: 2px; margin: 4.5px auto; background: var(--navy); transition: transform .18s ease; }
.menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(3px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3px) rotate(-45deg); }

/* hero: blueprint grid */
.hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--line); background:
  linear-gradient(90deg, rgba(46, 155, 224, .09) 1px, transparent 1px),
  linear-gradient(180deg, rgba(46, 155, 224, .09) 1px, transparent 1px),
  linear-gradient(180deg, #F7FBFF, var(--bg) 80%);
  background-size: 46px 46px, 46px 46px, 100% 100%; }
.hero::before { position: absolute; top: -120px; right: -100px; width: 380px; height: 380px; border: 1px solid rgba(46, 155, 224, .28); border-radius: 50%; content: ""; box-shadow: 0 0 0 40px rgba(46, 155, 224, .05), 0 0 0 80px rgba(46, 155, 224, .03); }
.hero-grid { position: relative; z-index: 2; display: grid; grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr); align-items: center; gap: clamp(26px, 4.2vw, 58px); padding: 54px 0 60px; }
.hero-copy { min-width: 0; }
.hero-kicker { display: inline-flex; align-items: center; gap: 9px; margin: 0 0 16px; color: var(--muted); font-family: var(--mono); font-size: 10.5px; letter-spacing: 1.6px; }
.hero-kicker b { padding: 2px 7px; border: 1px solid var(--blue); border-radius: 3px; background: #fff; color: var(--blue-deep); font-size: 9.5px; font-weight: 700; }
.hero h1 { margin: 0; font-size: clamp(40px, 5.7vw, 72px); font-weight: 900; letter-spacing: clamp(-.5px, -.22vw, -2px); line-height: 1.04; }
.hero-subtitle { margin: 16px 0 0; color: var(--blue-deep); font-size: clamp(17px, 2vw, 22px); font-weight: 800; line-height: 1.45; }
.hero-lead { max-width: 520px; margin: 14px 0 0; color: var(--muted); font-size: 14.5px; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 18px; margin-top: 26px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; gap: 12px; padding: 0 24px; border-radius: 4px; font-size: 14px; font-weight: 900; transition: transform .18s ease, background .18s ease; }
.button-primary { background: var(--blue); color: #fff; box-shadow: inset 0 -4px 0 rgba(0, 0, 0, .14); }
.button-primary:hover { background: var(--blue-deep); transform: translateY(-1px); }
.button-large { min-height: 52px; padding: 0 32px; font-size: 15px; }
.text-link { color: var(--blue-deep); border-bottom: 1px dashed #9CBED6; font-size: 13px; font-weight: 800; }
.text-link span { display: inline-block; margin-left: 5px; color: var(--orange); }
.hero-spec { display: flex; flex-wrap: wrap; gap: 10px; padding: 0; margin: 30px 0 0; list-style: none; }
.hero-spec li { display: flex; flex-direction: column; gap: 1px; padding: 10px 16px; border: 1px solid var(--line); border-left: 3px solid var(--blue); background: rgba(255, 255, 255, .82); min-width: 96px; }
.hero-spec span { color: var(--muted); font-family: var(--mono); font-size: 9.5px; letter-spacing: 1.2px; }
.hero-spec b { font-family: var(--mono); font-size: 15px; }

.console-panel { min-width: 0; border: 1px solid #B7D2E4; border-radius: 6px; background: #fff; box-shadow: 12px 12px 0 rgba(18, 48, 74, .07); }
.console-head { display: flex; align-items: center; justify-content: space-between; margin: 0; padding: 12px 16px; border-bottom: 1px solid var(--line); background: #EAF4FB; font-family: var(--mono); font-size: 11px; }
.console-head b { padding: 2px 8px; border-radius: 3px; background: #E3F5E9; color: #1C7A45; font-size: 9.5px; }
.preset-row { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; padding: 14px 16px 6px; }
.preset-row span { display: flex; flex-direction: column; gap: 1px; padding: 10px; border: 1px solid var(--line); border-radius: 4px; background: #FAFDFF; min-width: 0; }
.preset-row b { font-size: 13.5px; }
.preset-row small { color: var(--muted); font-size: 10px; }
.preset-row span.is-on { border-color: var(--blue); background: #EAF5FD; box-shadow: inset 0 0 0 1px var(--blue); }
.preset-row span.is-on b { color: var(--blue-deep); }
.switch-list { padding: 8px 16px 4px; margin: 0; list-style: none; }
.switch-list li { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 9px 0; border-bottom: 1px dashed var(--line); font-size: 12.5px; }
.switch-list li:last-child { border-bottom: 0; }
.switch-list i { padding: 1px 10px; border: 1px solid var(--line); border-radius: 10px; color: var(--muted); font-size: 10px; font-style: normal; }
.switch-list i.is-on { border-color: var(--blue); background: var(--blue); color: #fff; }
.console-foot { padding: 10px 16px 12px; margin: 0; border-top: 1px solid var(--line); color: var(--muted); font-family: var(--mono); font-size: 10px; }

/* features */
.features { padding: 68px 0 72px; border-bottom: 1px solid var(--line); background: var(--bg-2); }
.section-heading { margin-bottom: 28px; }
.section-heading h2 { margin: 0; font-size: clamp(23px, 2.5vw, 32px); font-weight: 900; letter-spacing: -.4px; line-height: 1.35; }
.section-heading > p:last-child { max-width: 620px; margin: 12px 0 0; color: var(--muted); font-size: 14px; }
.section-heading-split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(200px, 300px); align-items: end; gap: 24px; }
.section-heading-split > p:last-child { margin: 0 0 4px; }
.feature-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.feature-card { padding: 20px 20px 18px; border: 1px solid var(--line); border-radius: 4px; background: #fff; min-width: 0; }
.feature-tag { display: inline-block; margin: 0 0 9px; padding: 1px 6px; border: 1px solid var(--line); color: var(--blue-deep); font-family: var(--mono); font-size: 9px; letter-spacing: 1.4px; }
.feature-card h3 { margin: 0 0 6px; font-size: 16.5px; font-weight: 900; }
.feature-card p:last-child { margin: 0; color: var(--muted); font-size: 12.8px; line-height: 1.75; }

/* shots: four columns */
.shots { padding: 68px 0 78px; }
.shot-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.shot-card { margin: 0; border: 1px solid var(--line); border-radius: 4px; background: #fff; overflow: hidden; }
.shot-card img { width: 100%; height: auto; aspect-ratio: 9 / 16; object-fit: cover; object-position: center 8%; }
.shot-card:nth-child(2) img { object-position: center 40%; }
.shot-card:nth-child(3) img { object-position: center 62%; }
.shot-card figcaption { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 8px; padding: 9px 12px; border-top: 1px solid var(--line); }
.shot-card figcaption span { color: var(--orange); font-family: var(--mono); font-size: 9.5px; }
.shot-card figcaption b { font-size: 12.5px; font-weight: 900; }
.shot-card figcaption small { flex-basis: 100%; color: var(--muted); font-size: 10.5px; }

/* faq: spec rows */
.faq { padding: 68px 0 76px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--bg-2); }
.faq-list { border: 1px solid var(--line); border-radius: 4px; background: #fff; }
.faq-list details { border-top: 1px solid var(--line); }
.faq-list details:first-child { border-top: 0; }
.faq-list summary { display: grid; grid-template-columns: minmax(0, 1fr) 24px; align-items: center; gap: 14px; padding: 15px 18px; cursor: pointer; list-style: none; background: #F6FBFF; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary h3 { margin: 0; font-size: 14.5px; font-weight: 900; }
.faq-list summary i { position: relative; width: 20px; height: 20px; border: 1px solid var(--line); border-radius: 3px; background: #fff; }
.faq-list summary i::before, .faq-list summary i::after { position: absolute; top: 50%; left: 50%; width: 8px; height: 1.5px; content: ""; background: var(--blue); 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 { display: grid; grid-template-columns: minmax(0, 1fr); padding: 12px 18px 16px 18px; margin: 0; border-left: 3px solid var(--orange); color: var(--muted); font-size: 13.2px; line-height: 1.85; }

/* reviews */
.reviews { padding: 68px 0 78px; }
.review-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; padding: 0; margin: 0; list-style: none; }
.review-card { padding: 14px 16px; border: 1px solid var(--line); border-radius: 4px; background: #FBFDFF; min-width: 0; }
.review-meta { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; margin-bottom: 6px; padding-bottom: 6px; border-bottom: 1px dashed var(--line); }
.review-meta b { color: var(--blue-deep); font-family: var(--mono); font-size: 12px; }
.review-meta time { color: #8FA9BB; font-family: var(--mono); font-size: 9.5px; }
.review-card p { margin: 0; color: #49657A; font-size: 12.8px; line-height: 1.8; }

/* steps */
.steps { padding: 66px 0 72px; border-top: 1px solid var(--line); background: var(--bg-2); }
.step-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; padding: 0; margin: 24px 0 0; list-style: none; counter-reset: step; }
.step-list li { padding: 18px 18px 16px; border: 1px solid var(--line); border-radius: 4px; background: #fff; min-width: 0; }
.step-list span { display: inline-block; margin-bottom: 8px; color: var(--orange); font-family: var(--mono); font-size: 10px; letter-spacing: 1.4px; }
.step-list h3 { margin: 0 0 5px; font-size: 15.5px; font-weight: 900; }
.step-list p { margin: 0; color: var(--muted); font-size: 12.5px; }

/* download */
.download { padding: 24px 0 28px; }
.download-inner { position: relative; display: flex; flex-direction: column; align-items: center; padding: 44px clamp(22px, 5vw, 54px) 38px; border: 1px solid #B7D2E4; border-radius: 6px; background:
  linear-gradient(90deg, rgba(46, 155, 224, .07) 1px, transparent 1px),
  linear-gradient(180deg, rgba(46, 155, 224, .07) 1px, transparent 1px),
  #F8FCFF; background-size: 34px 34px; text-align: center; }
.download-inner::before, .download-inner::after { position: absolute; width: 14px; height: 14px; content: ""; border: 2px solid var(--blue); }
.download-inner::before { top: -2px; left: -2px; border-right: 0; border-bottom: 0; }
.download-inner::after { bottom: -2px; right: -2px; border-left: 0; border-top: 0; }
.download h2 { max-width: 620px; margin: 0; font-size: clamp(23px, 2.5vw, 32px); font-weight: 900; letter-spacing: -.4px; line-height: 1.35; }
.download-inner > p { max-width: 520px; margin: 12px 0 22px; color: var(--muted); font-size: 14px; }
.download-notes { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 22px; padding: 16px 0 0; margin: 22px 0 0; border-top: 1px dashed var(--line); list-style: none; }
.download-notes li { color: #5F7C90; font-family: var(--mono); font-size: 10.5px; }
.download-notes li::before { margin-right: 7px; content: "//"; color: var(--orange); }

/* footer */
.site-footer { padding: 38px 0 46px; 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: 17px; 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: #4E6C83; font-size: 12px; }
.footer-nav a:hover { color: var(--blue); }
.footer-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 20px; margin-top: 18px; padding-top: 14px; 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: #8FA9BB; font-size: 11.5px; line-height: 1.8; }

/* responsive */
@media (max-width: 1040px) {
  .hero h1 { font-size: clamp(36px, 5vw, 60px); }
  .shot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
  .menu-toggle { display: block; }
  .primary-nav { position: absolute; top: 100%; left: 0; right: 0; display: none; padding: 8px 24px 14px; border-bottom: 1px solid var(--line); background: var(--bg); box-shadow: 0 16px 26px rgba(18, 48, 74, .14); }
  .primary-nav.is-open { display: block; }
  .primary-nav ul { flex-direction: column; align-items: stretch; gap: 0; }
  .primary-nav a { padding: 11px 0; border-bottom: 1px solid var(--line); }
  .hero-grid { grid-template-columns: 1fr; padding: 40px 0 48px; }
  .hero-copy { order: 1; }
  .console-panel { order: 2; }
  .step-list { grid-template-columns: 1fr; gap: 10px; }
}
@media (max-width: 768px) {
  .feature-grid { grid-template-columns: 1fr; }
  .section-heading-split { grid-template-columns: 1fr; gap: 10px; }
  .section-heading-split > p:last-child { margin: 0; }
  .review-list { grid-template-columns: 1fr; }
  .shot-grid { gap: 10px; }
  .shot-card figcaption small { display: none; }
}
@media (max-width: 560px) {
  .page-shell, .nav-shell { width: calc(100% - 32px); }
  .hero h1 { font-size: clamp(34px, 10.4vw, 50px); }
  .hero-lead { font-size: 14px; }
  .brand { font-size: 14.5px; gap: 6px; }
  .brand img { width: 30px; height: 30px; }
  .nav-actions { gap: 7px; }
  .nav-download { min-height: 34px; padding: 0 9px; font-size: 10.5px; gap: 4px; }
  .nav-download svg { width: 13px; height: 13px; }
  .menu-toggle { width: 34px; height: 34px; }
  .hero-spec li { flex: 1 1 30%; min-width: 0; padding: 8px 10px; }
  .preset-row { gap: 6px; padding: 12px 12px 4px; }
  .switch-list { padding: 6px 12px 2px; }
  .download-inner { padding: 36px 18px 30px; }
  .button { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 380px) {
  .brand span { display: none; }
}