@charset "UTF-8";

:root {
  --bg: #141312;
  --bg-2: #1b1917;
  --panel: #211e1c;
  --line: #342f2b;
  --ink: #f4ede5;
  --muted: #a49a90;
  --orange: #ff5a1f;
  --orange-dim: #b3441a;
  --shell: 1180px;
  --header-height: 72px;
  --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;
}
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(--orange); 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 13px;
  color: var(--orange);
  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; }

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  border-bottom: 1px solid var(--line);
  background: rgba(20, 19, 18, .94);
  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: 18px;
}
.brand { display: inline-flex; align-items: center; flex: none; gap: 9px; font-size: 21px; font-weight: 900; letter-spacing: -.2px; }
.brand img { width: 38px; height: 38px; border-radius: 8px; object-fit: contain; background: #0f0e0d; }
.brand-tag {
  display: inline-flex;
  align-items: center;
  height: 19px;
  padding: 0 7px;
  border: 1px solid var(--orange-dim);
  border-radius: 3px;
  color: var(--orange);
  font-size: 9.5px;
  font-style: normal;
  font-weight: 900;
  letter-spacing: 1px;
}
.primary-nav { margin-left: auto; }
.primary-nav ul { display: flex; align-items: center; gap: clamp(12px, 1.8vw, 24px); padding: 0; margin: 0; list-style: none; }
.primary-nav a { display: block; padding: 7px 0; border-bottom: 2px solid transparent; color: #b3a89d; font-size: 13px; font-weight: 700; }
.primary-nav a:hover { border-bottom-color: var(--orange); 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(--orange);
  border-radius: 5px;
  background: var(--orange);
  color: #16110d;
  font-size: 13px;
  font-weight: 900;
  white-space: nowrap;
  transition: background .18s ease, color .18s ease;
}
.nav-download:hover { background: transparent; color: var(--orange); }
.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: 5px; 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(640px 380px at 88% 8%, rgba(255, 90, 31, .16), transparent 70%),
    linear-gradient(180deg, #191716 0%, var(--bg) 100%);
}
.hero-watermark {
  position: absolute;
  top: -58px;
  left: -26px;
  color: transparent;
  font-family: var(--mono);
  font-size: clamp(200px, 36vw, 480px);
  font-weight: 900;
  letter-spacing: -12px;
  line-height: .78;
  -webkit-text-stroke: 2px rgba(255, 90, 31, .34);
  pointer-events: none;
  user-select: none;
}
.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(300px, .98fr);
  align-items: center;
  gap: clamp(26px, 4vw, 64px);
  padding: 58px 0 54px;
}
.hero-copy { min-width: 0; }
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 14px;
  color: #c4b8ac;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 1.6px;
}
.hero-kicker b {
  padding: 2px 7px;
  border-radius: 3px;
  background: var(--orange);
  color: #16110d;
  font-size: 10px;
  font-weight: 900;
  letter-spacing: .5px;
}
.hero h1 {
  margin: 0;
  font-size: clamp(44px, 6.6vw, 86px);
  font-weight: 900;
  letter-spacing: clamp(-2px, -.45vw, -4px);
  line-height: 1;
}
.hero-subtitle {
  margin: 18px 0 0;
  color: var(--orange);
  font-size: clamp(18px, 2.2vw, 25px);
  font-weight: 800;
  line-height: 1.4;
}
.hero-lead { max-width: 540px; margin: 11px 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: 5px;
  font-size: 14px;
  font-weight: 900;
  transition: transform .18s ease, background .18s ease, color .18s ease;
}
.button-primary { background: var(--orange); color: #16110d; box-shadow: 0 14px 30px rgba(255, 90, 31, .22); }
.button-primary:hover { background: #ff7542; transform: translateY(-2px); }
.button-large { min-height: 54px; padding: 0 34px; font-size: 15px; }
.text-link { color: #c9bdb1; border-bottom: 1px dashed #5a4d43; font-size: 13px; font-weight: 800; }
.text-link span { display: inline-block; margin-left: 5px; color: var(--orange); }
.hero-filter {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 26px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #171513;
}
.hero-filter span { display: inline-flex; align-items: baseline; gap: 6px; padding: 6px 16px; border-radius: 999px; color: #9c9188; font-size: 12.5px; font-weight: 800; }
.hero-filter span.is-active { background: var(--orange); color: #16110d; }
.hero-filter b { font-family: var(--mono); font-size: 10.5px; font-weight: 700; }

.hero-stack { position: relative; width: 100%; max-width: 430px; height: 468px; justify-self: end; }
.stack-card {
  position: absolute;
  width: 62%;
  height: 86%;
  margin: 0;
  border: 1px solid #453c35;
  border-radius: 8px;
  background: #1d1a18;
  box-shadow: 0 24px 40px rgba(0, 0, 0, .55);
  overflow: hidden;
  transition: transform .25s ease;
}
.stack-card img { width: 100%; height: 100%; object-fit: cover; }
.stack-card-1 { left: 0; top: 40px; transform: rotate(-9deg); z-index: 1; }
.stack-card-2 { left: 21%; top: 6px; transform: rotate(2deg); z-index: 2; }
.stack-card-3 { right: 0; top: 52px; transform: rotate(11deg); z-index: 3; }
.stack-card:hover { transform: rotate(0) translateY(-6px); z-index: 4; }

/* features */
.features { padding: 74px 0 78px; border-bottom: 1px solid var(--line); background: var(--bg-2); }
.section-heading { margin-bottom: 28px; }
.section-heading h2, .download h2 { margin: 0; font-size: clamp(25px, 2.9vw, 35px); font-weight: 900; letter-spacing: -.8px; line-height: 1.3; }
.section-heading > p:last-child { max-width: 620px; margin: 11px 0 0; color: var(--muted); font-size: 14px; }
.feature-list { border-top: 1px solid var(--line); }
.feature-row {
  display: grid;
  grid-template-columns: 74px 170px minmax(0, 1fr);
  align-items: center;
  gap: 22px;
  padding: 20px 6px;
  border-bottom: 1px solid var(--line);
  transition: background .18s ease;
}
.feature-row:hover { background: #1f1c1a; }
.feature-no { color: var(--orange); font-family: var(--mono); font-size: 22px; font-weight: 700; letter-spacing: -1px; }
.feature-row h3 { margin: 0; font-size: 17px; font-weight: 900; }
.feature-row p { margin: 0; color: var(--muted); font-size: 13.5px; line-height: 1.8; }

/* shots */
.shots { padding: 74px 0 82px; }
.shot-mosaic {
  display: grid;
  grid-template-columns: 1.3fr .7fr .7fr;
  grid-template-rows: 206px 206px;
  grid-template-areas:
    "wide a b"
    "wide c c";
  gap: 12px;
}
.shot-card { position: relative; margin: 0; border: 1px solid var(--line); border-radius: 8px; background: #1d1a18; overflow: hidden; }
.shot-card img { width: 100%; height: 100%; object-fit: cover; }
.shot-wide { grid-area: wide; }
.shot-card:nth-child(2) { grid-area: a; }
.shot-card:nth-child(3) { grid-area: b; }
.shot-card:nth-child(4) { grid-area: c; }
.shot-card figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 26px 13px 11px;
  background: linear-gradient(180deg, transparent, rgba(12, 11, 10, .88));
  color: #f6efe8;
}
.shot-card figcaption b { color: var(--orange); font-family: var(--mono); font-size: 10px; }
.shot-card figcaption span { display: flex; flex-direction: column; font-size: 12.5px; font-weight: 800; line-height: 1.4; }
.shot-card figcaption small { color: #b9ada2; font-size: 10.5px; font-weight: 500; }

/* faq */
.faq { padding: 72px 0 78px; border-top: 1px solid var(--line); background: var(--bg-2); }
.faq-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.faq-grid details { border: 1px solid var(--line); border-left: 3px solid var(--orange-dim); border-radius: 0 8px 8px 0; background: var(--panel); }
.faq-grid summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 15px 17px;
  cursor: pointer;
  list-style: none;
}
.faq-grid summary::-webkit-details-marker { display: none; }
.faq-grid summary h3 { margin: 0; font-size: 15px; font-weight: 900; }
.faq-grid summary i { position: relative; flex: none; width: 22px; height: 22px; border: 1px solid #4a4038; border-radius: 4px; }
.faq-grid summary i::before,
.faq-grid summary i::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 9px;
  height: 1.5px;
  content: "";
  background: var(--orange);
  transform: translate(-50%, -50%);
}
.faq-grid summary i::after { transform: translate(-50%, -50%) rotate(90deg); transition: transform .2s ease; }
.faq-grid details[open] summary i::after { transform: translate(-50%, -50%) rotate(0); }
.faq-grid details p { padding: 0 18px 16px; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }

/* reviews */
.reviews { padding: 74px 0 80px; }
.review-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; padding: 0; margin: 0; list-style: none; }
.review-card { position: relative; padding: 17px 20px 17px 24px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); }
.review-card::before { position: absolute; top: 12px; left: 0; width: 3px; height: calc(100% - 24px); content: ""; background: var(--orange); opacity: .65; }
.review-meta { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 6px; margin-bottom: 7px; }
.review-meta b { color: var(--orange); font-size: 13px; font-weight: 900; }
.review-meta time { color: #837a71; font-family: var(--mono); font-size: 9.5px; }
.review-card p { margin: 0; color: #c6bcb2; font-size: 13px; line-height: 1.8; }

/* steps */
.steps { padding: 72px 0 80px; border-top: 1px solid var(--line); background: var(--bg-2); }
.step-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; padding: 0; margin: 0; list-style: none; counter-reset: step; }
.step-list li { position: relative; padding: 22px 22px 24px; border: 1px solid var(--line); border-radius: 8px; background: #191716; overflow: hidden; }
.step-list span { position: absolute; top: -10px; right: 8px; color: rgba(255, 90, 31, .16); font-family: var(--mono); font-size: 62px; font-weight: 900; line-height: 1; }
.step-list h3 { position: relative; margin: 0 0 6px; font-size: 16px; font-weight: 900; }
.step-list h3::before { display: block; width: 22px; height: 2px; margin-bottom: 10px; content: ""; background: var(--orange); }
.step-list p { position: relative; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }

/* download */
.download { padding: 26px 0 62px; }
.download-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 26px 44px;
  padding: 40px clamp(24px, 4vw, 52px);
  border: 1px solid #5a3a26;
  border-radius: 10px;
  background:
    linear-gradient(120deg, rgba(255, 90, 31, .14), transparent 60%),
    #1e1a17;
}
.download h2 { max-width: 540px; }
.download-inner p, .download-copy > p { max-width: 520px; margin: 10px 0 0; color: #b3a79c; font-size: 13.5px; }
.download-copy > .button, .download-panel > .button { justify-self: end; white-space: nowrap; }
.download-notes { display: flex; flex-wrap: wrap; gap: 6px 20px; padding: 0; margin: 14px 0 0; list-style: none; }
.download-notes li { color: #93887d; font-family: var(--mono); font-size: 10.5px; }
.download-notes li::before { margin-right: 6px; color: var(--orange); content: "/"; }

/* footer */
.site-footer { padding: 42px 0 52px; border-top: 1px solid var(--line); }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 20px 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: #b9ada2; font-size: 12px; }
.footer-nav a:hover { color: var(--orange); }
.footer-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 20px; margin-top: 22px; padding-top: 18px; 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: #8a8078; font-size: 11.5px; line-height: 1.8; }

/* responsive */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-stack { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; height: auto; max-width: none; margin-top: 10px; justify-self: stretch; }
  .stack-card, .stack-card-1, .stack-card-2, .stack-card-3 { position: static; width: auto; height: auto; aspect-ratio: 3 / 4; transform: none; }
  .stack-card:hover { transform: translateY(-4px); }
  .feature-row { grid-template-columns: 60px 150px minmax(0, 1fr); gap: 16px; }
}
@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 { padding-top: 2px; }
  .hero-grid { padding: 44px 0 44px; }
  .hero-watermark { top: -20px; }
  .shot-mosaic {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-rows: none;
    grid-template-areas: none;
  }
  .shot-wide, .shot-card:nth-child(2), .shot-card:nth-child(3), .shot-card:nth-child(4) { grid-area: auto; }
  .shot-card { aspect-ratio: 4 / 3; }
  .shot-card img { height: 100%; }
  .faq-grid { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .step-list { grid-template-columns: 1fr; }
  .download-panel { grid-template-columns: 1fr; }
  .download-panel > .button { justify-self: start; }
}
@media (max-width: 600px) {
  .page-shell, .nav-shell { width: calc(100% - 32px); }
  .brand { font-size: 18px; }
  .brand-tag { display: none; }
  .nav-actions { gap: 8px; }
  .nav-download { min-height: 36px; padding: 0 10px; font-size: 11px; gap: 5px; }
  .nav-download svg { width: 14px; height: 14px; }
  .menu-toggle { width: 36px; height: 36px; }
  .hero h1 { font-size: clamp(38px, 13vw, 52px); }
  .hero-lead { font-size: 13.5px; }
  .feature-row { grid-template-columns: 46px minmax(0, 1fr); gap: 6px 12px; padding: 16px 2px; }
  .feature-row p { grid-column: 2; }
  .feature-no { font-size: 18px; }
  .shot-mosaic { grid-template-columns: 1fr; }
  .shot-card { aspect-ratio: 16 / 10; }
  .faq-grid summary h3 { font-size: 14px; }
  .download h2 { font-size: 22px; }
  .download-panel > .button { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 380px) {
  .brand { font-size: 16px; gap: 7px; }
  .brand img { width: 30px; height: 30px; }
  .nav-download { min-height: 32px; padding: 0 8px; font-size: 10px; gap: 4px; }
  .nav-download svg { width: 12px; height: 12px; }
  .menu-toggle { width: 32px; height: 32px; }
  .hero h1 { font-size: 34px; }
  .hero-subtitle { font-size: 16px; }
  .button { width: 100%; padding: 0 12px; font-size: 13px; }
  .hero-filter span { padding: 5px 11px; font-size: 11.5px; }
}