@charset "UTF-8";

:root {
  --bg: #0E2B22;
  --bg-2: #12352A;
  --panel: #173E31;
  --line: #24523F;
  --ink: #EDF5EF;
  --muted: #9DBBAE;
  --orange: #FF8A3D;
  --orange-soft: #FFB27A;
  --shell: 1160px;
  --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%; 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% - 44px), var(--shell)); margin: 0 auto; }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; padding: 4px 10px 4px 8px; margin: 0 0 14px; border: 1px solid var(--line); border-radius: 4px; color: var(--orange-soft); font-family: var(--mono); font-size: 10.5px; font-weight: 700; letter-spacing: 1.8px; line-height: 1.5; }
.eyebrow::before { width: 6px; height: 6px; content: ""; background: var(--orange); }

/* header */
.site-header { position: sticky; top: 0; z-index: 60; border-bottom: 1px solid var(--line); background: rgba(14, 43, 34, .97); backdrop-filter: blur(12px); }
.nav-shell { display: flex; align-items: center; justify-content: space-between; width: min(calc(100% - 44px), var(--shell)); min-height: var(--header-height); margin: 0 auto; gap: 18px; }
.brand { display: inline-flex; align-items: center; flex: none; gap: 10px; font-size: 17px; font-weight: 900; letter-spacing: .2px; }
.brand img { width: 36px; height: 36px; border-radius: 9px; object-fit: contain; background: #0B221B; }
.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: 8px 0; color: #A9C4B7; font-size: 13px; font-weight: 700; }
.primary-nav a:hover { color: var(--orange-soft); }
.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: 7px; padding: 0 15px; border-radius: 4px; background: var(--orange); color: #231508; font-size: 12.5px; font-weight: 900; white-space: nowrap; transition: background .18s ease; }
.nav-download:hover { background: var(--orange-soft); }
.nav-download svg, .button svg { width: 17px; height: 17px; flex: none; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.menu-toggle { display: none; width: 42px; height: 42px; padding: 0; border: 1px solid var(--line); border-radius: 6px; 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 320px at 92% 8%, rgba(255, 138, 61, .16), transparent 70%),
  linear-gradient(160deg, #12392C 0%, var(--bg) 66%); }
.hero::before { position: absolute; inset: 0; content: ""; background-image: linear-gradient(90deg, rgba(36, 82, 63, .5) 1px, transparent 1px); background-size: 84px 100%; opacity: .5; pointer-events: none; }
.hero-grid { position: relative; z-index: 2; display: grid; grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr); align-items: center; gap: clamp(26px, 4vw, 58px); padding: 62px 0 66px; }
.hero-copy { min-width: 0; }
.hero-kicker { display: inline-flex; align-items: center; gap: 10px; margin: 0 0 18px; color: #A9C4B7; font-family: var(--mono); font-size: 11px; letter-spacing: 1.6px; }
.hero-kicker b { padding: 3px 7px; border: 1px solid var(--orange); border-radius: 3px; color: var(--orange); font-size: 9.5px; letter-spacing: 1.4px; }
.hero h1 { margin: 0; font-size: clamp(38px, 5vw, 64px); font-weight: 900; letter-spacing: clamp(-1px, -.25vw, -2px); line-height: 1.06; }
.hero-subtitle { margin: 16px 0 0; color: var(--orange-soft); font-size: clamp(17px, 1.9vw, 22px); font-weight: 800; }
.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: 16px; margin-top: 26px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; gap: 12px; padding: 0 24px; border: 1px solid transparent; border-radius: 5px; font-size: 14px; font-weight: 900; transition: transform .18s ease, background .18s ease; }
.button-primary { background: var(--orange); color: #231508; box-shadow: 0 14px 28px rgba(255, 138, 61, .2); }
.button-primary:hover { background: var(--orange-soft); transform: translateY(-2px); }
.button-large { min-height: 54px; padding: 0 30px; font-size: 15px; }
.text-link { color: #C5DACE; border-bottom: 1px dashed #3E6A54; font-size: 13px; font-weight: 800; }
.text-link span { margin-left: 4px; color: var(--orange); }
.hero-meta { display: flex; flex-wrap: wrap; gap: 10px 24px; padding: 0; margin: 30px 0 0; list-style: none; color: #8FAEA0; font-size: 12px; }
.hero-meta b { margin-right: 5px; color: var(--ink); font-family: var(--mono); font-size: 15px; }

/* toolbox panel */
.toolbox { min-width: 0; padding: 16px; border: 1px solid var(--line); border-radius: 12px; background: linear-gradient(180deg, #1B4737 0%, #143528 100%); box-shadow: 0 26px 54px rgba(0, 0, 0, .42); }
.toolbox-bar { display: flex; align-items: center; gap: 8px; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.toolbox-bar .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--orange); box-shadow: 0 0 0 3px rgba(255, 138, 61, .18); }
.toolbox-bar p { flex: 1; min-width: 0; margin: 0; color: #BFD5C8; font-size: 12px; font-weight: 700; }
.toolbox-bar b { padding: 2px 7px; border-radius: 3px; background: rgba(255, 138, 61, .16); color: var(--orange-soft); font-size: 10.5px; font-weight: 800; }
.drawer-list { padding: 0; margin: 8px 0 0; list-style: none; }
.drawer-list li { display: grid; grid-template-columns: 30px minmax(0, 1fr) 28px; align-items: center; gap: 12px; padding: 13px 12px; margin-top: 6px; border: 1px solid transparent; border-radius: 7px; background: rgba(11, 34, 27, .55); }
.drawer-list li > span { color: #6E9384; font-family: var(--mono); font-size: 11px; letter-spacing: 1px; }
.drawer-list div { display: flex; flex-direction: column; min-width: 0; }
.drawer-list b { font-size: 13.5px; font-weight: 900; }
.drawer-list small { color: #85A697; font-size: 11.5px; }
.drawer-list i { display: inline-flex; align-items: center; justify-content: center; width: 26px; height: 26px; border-radius: 4px; background: #26503F; color: #8FB3A2; font-size: 10.5px; font-style: normal; font-weight: 800; }
.drawer-list li.is-open { border-color: rgba(255, 138, 61, .55); background: linear-gradient(90deg, rgba(255, 138, 61, .13), rgba(11, 34, 27, .5)); }
.drawer-list li.is-open i { background: var(--orange); color: #231508; }
.drawer-list li.is-open > span { color: var(--orange-soft); }
.toolbox-foot { display: flex; justify-content: space-between; padding-top: 12px; margin-top: 10px; border-top: 1px dashed #2C5A46; color: #7C9E8E; font-family: var(--mono); font-size: 10.5px; }

/* features: four rack columns */
.features { padding: 72px 0 76px; border-bottom: 1px solid var(--line); background: var(--bg-2); }
.section-heading { margin-bottom: 30px; }
.section-heading h2 { margin: 0; font-size: clamp(23px, 2.6vw, 32px); font-weight: 900; letter-spacing: -.4px; line-height: 1.36; }
.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(190px, 280px); align-items: end; gap: 22px; }
.section-heading-split > p:last-child { margin: 0 0 5px; }
.section-heading-line { padding-left: 18px; border-left: 3px solid var(--orange); }
.rack { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: var(--panel); }
.rack-item { min-width: 0; padding: 26px 22px 28px; border-left: 1px solid var(--line); }
.rack-item:first-child { border-left: 0; background: linear-gradient(180deg, rgba(255, 138, 61, .1), transparent 60%); }
.rack-no { display: block; color: var(--orange); font-family: var(--mono); font-size: 11px; letter-spacing: 2px; }
.rack-item h3 { margin: 12px 0 8px; font-size: 17px; font-weight: 900; }
.rack-item p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.85; }

/* shots: one wide lead + three */
.shots { padding: 72px 0 78px; }
.shot-wide { display: grid; gap: 14px; }
.shot-lead, .shot-small { margin: 0; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: var(--panel); }
.shot-lead img, .shot-small img { width: 100%; height: auto; }
.shot-lead img { aspect-ratio: 16 / 9; object-fit: cover; }
.shot-lead figcaption, .shot-small figcaption { display: flex; align-items: center; gap: 12px; padding: 12px 16px; border-top: 1px solid var(--line); }
.shot-lead figcaption b, .shot-small figcaption b { color: var(--orange); font-family: var(--mono); font-size: 11px; letter-spacing: 1.4px; }
.shot-lead figcaption span, .shot-small figcaption span { display: flex; align-items: baseline; gap: 10px; font-size: 14px; font-weight: 900; }
.shot-lead figcaption small, .shot-small figcaption small { color: var(--muted); font-size: 12px; font-weight: 400; }
.shot-side { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.shot-small img { aspect-ratio: 16 / 9; object-fit: cover; }
.shot-small figcaption { padding: 10px 13px; }
.shot-small figcaption span { flex-direction: column; gap: 2px; font-size: 13px; }

/* faq: two columns cards */
.faq { padding: 72px 0 76px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--bg-2); }
.faq-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; align-items: start; }
.faq-grid details { min-width: 0; padding: 0 18px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); }
.faq-grid summary { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 15px 0; cursor: pointer; list-style: none; }
.faq-grid summary::-webkit-details-marker { display: none; }
.faq-grid h3 { margin: 0; font-size: 14.5px; font-weight: 900; line-height: 1.5; }
.faq-grid summary i { position: relative; width: 18px; height: 18px; flex: none; border: 1px solid #3A6A55; border-radius: 50%; }
.faq-grid summary i::before, .faq-grid summary i::after { position: absolute; top: 50%; left: 50%; width: 7px; height: 1.5px; content: ""; background: var(--orange-soft); transform: translate(-50%, -50%); }
.faq-grid summary i::after { transform: translate(-50%, -50%) rotate(90deg); }
.faq-grid details[open] summary i::after { transform: translate(-50%, -50%) rotate(0deg); }
.faq-grid details p { padding: 13px 0 16px; margin: 0; border-top: 1px dashed #2C5A46; color: var(--muted); font-size: 13px; line-height: 1.85; }

/* reviews */
.reviews { padding: 72px 0 78px; }
.review-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; padding: 0; margin: 0; list-style: none; }
.review-card { min-width: 0; padding: 20px 22px; border: 1px solid var(--line); border-left: 2px solid var(--orange); border-radius: 4px 8px 8px 4px; background: var(--panel); }
.review-head { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.review-head b { color: #D6E8DE; font-size: 13.5px; font-weight: 900; }
.review-head time { color: #7C9E8E; font-family: var(--mono); font-size: 10.5px; }
.review-card p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.85; }

/* steps */
.steps { padding: 72px 0 78px; border-top: 1px solid var(--line); border-bottom: 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: 0; list-style: none; counter-reset: step; }
.step-list li { position: relative; min-width: 0; padding: 22px 22px 24px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); }
.step-list li > span { display: block; color: var(--orange); font-family: var(--mono); font-size: 30px; font-weight: 700; letter-spacing: -1px; line-height: 1; }
.step-list li > span::after { display: inline-block; width: 26px; height: 1px; margin-left: 10px; vertical-align: 8px; content: ""; background: #3A6A55; }
.step-list h3 { margin: 14px 0 7px; font-size: 16px; font-weight: 900; }
.step-list p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }

/* download */
.download { padding: 62px 0 68px; background:
  repeating-linear-gradient(135deg, #0D281F 0 12px, #0F2C22 12px 24px); }
.download-panel { display: grid; grid-template-columns: minmax(0, 1fr) minmax(240px, 342px); align-items: center; gap: 30px; padding: 32px; border: 1px solid #2E5C47; border-radius: 12px; background: linear-gradient(150deg, #1A4636, #123327); box-shadow: inset 0 0 0 5px rgba(14, 43, 34, .6); }
.download-panel h2 { margin: 0; font-size: clamp(22px, 2.4vw, 30px); font-weight: 900; line-height: 1.35; }
.download-panel > div > p:last-child { margin: 10px 0 0; color: var(--muted); font-size: 13.5px; }
.download-act { min-width: 0; }
.download-act .button { width: 100%; }
.download-notes { display: flex; flex-wrap: wrap; gap: 6px 14px; padding: 0; margin: 14px 0 0; list-style: none; color: #9CBBAC; font-size: 11.5px; }
.download-notes li::before { margin-right: 6px; color: var(--orange); content: "·"; }

/* footer */
.site-footer { padding: 46px 0 34px; border-top: 1px solid var(--line); background: #0B231B; }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.2fr) minmax(0, 1fr); gap: 24px; align-items: start; }
.footer-brand strong { display: block; margin-bottom: 6px; font-size: 15px; font-weight: 900; }
.footer-brand p { margin: 0; color: #7C9E8E; font-size: 12px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: 12.5px; }
.footer-nav a { color: #A4C1B2; }
.footer-nav a:hover { color: var(--orange-soft); }
.footer-meta { font-size: 12px; color: #7C9E8E; text-align: right; }
.footer-meta p { margin: 0 0 6px; }
.footer-meta a { color: #A4C1B2; }
.disclaimer { grid-column: 1 / -1; padding-top: 18px; margin: 4px 0 0; border-top: 1px solid #1C4033; color: #6F9384; font-size: 11.5px; line-height: 1.8; }

/* responsive */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; padding: 46px 0 48px; }
  .toolbox { order: 2; }
  .rack { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .rack-item:nth-child(3) { border-left: 0; }
  .rack-item:nth-child(n+3) { border-top: 1px solid var(--line); }
  .faq-grid, .review-grid { grid-template-columns: 1fr; }
  .download-panel { grid-template-columns: 1fr; padding: 26px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-meta { text-align: left; }
}
@media (max-width: 860px) {
  .primary-nav { position: absolute; top: 100%; left: 0; right: 0; display: none; margin: 0; padding: 8px 22px 16px; border-bottom: 1px solid var(--line); background: #0C291F; }
  .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 #1C4033; font-size: 14px; }
  .menu-toggle { display: block; }
  .nav-download span { font-size: 12px; }
}
@media (max-width: 640px) {
  .page-shell, .nav-shell { width: calc(100% - 34px); }
  .brand { font-size: 15px; }
  .nav-download { padding: 0 12px; }
  .hero h1 { font-size: 34px; }
  .hero-subtitle { font-size: 16px; }
  .hero-lead { font-size: 13.5px; }
  .hero-meta { gap: 8px 18px; margin-top: 22px; }
  .shot-side { grid-template-columns: 1fr; }
  .shot-lead figcaption span, .shot-small figcaption span { flex-direction: column; gap: 1px; }
  .rack { grid-template-columns: 1fr; }
  .rack-item { border-left: 0; }
  .rack-item + .rack-item { border-top: 1px solid var(--line); }
  .step-list { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .section-heading-split { grid-template-columns: 1fr; }
  .button, .button-large { width: 100%; }
  .text-link { display: none; }
}
@media (max-width: 380px) {
  .brand span { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}