@charset "UTF-8";

:root {
  --bg: #1e2228;
  --bg-2: #232830;
  --panel: #272d35;
  --panel-2: #2c333c;
  --line: #3a434d;
  --ink: #e7f2ea;
  --muted: #9aa8a0;
  --green: #39ff88;
  --green-soft: rgba(57, 255, 136, .12);
  --shell: 1180px;
  --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;
}
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(--green); 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(--green);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2.2px;
  line-height: 1.4;
}
.eyebrow::before { width: 18px; height: 1px; content: ""; background: currentColor; }

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  border-bottom: 1px solid var(--line);
  background: rgba(30, 34, 40, .95);
  backdrop-filter: blur(12px);
}
.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: 10px; font-size: 21px; font-weight: 900; letter-spacing: -.3px; }
.brand img { width: 34px; height: 34px; border: 1px solid #3f4c48; border-radius: 8px; object-fit: contain; background: #171b20; }
.brand-mono { color: var(--green); font-family: var(--mono); font-size: 17px; font-style: normal; line-height: 1; }
.primary-nav { margin-left: auto; }
.primary-nav ul { display: flex; align-items: center; gap: clamp(12px, 1.9vw, 24px); padding: 0; margin: 0; list-style: none; }
.primary-nav a { display: block; padding: 7px 0; border-bottom: 1px solid transparent; color: #a8b4ad; font-size: 13px; font-weight: 700; }
.primary-nav a:hover { border-bottom-color: var(--green); 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: 40px;
  padding: 0 16px;
  border: 1px solid var(--green);
  border-radius: 4px;
  background: var(--green-soft);
  color: var(--green);
  font-size: 13px;
  font-weight: 900;
  white-space: nowrap;
  transition: background .18s ease, color .18s ease;
}
.nav-download:hover { background: var(--green); color: #10241a; }
.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: 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: rule panel + phone + json strip */
.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(560px 340px at 84% 0%, rgba(57, 255, 136, .13), transparent 70%),
    radial-gradient(420px 280px at 4% 96%, rgba(57, 255, 136, .05), transparent 70%),
    linear-gradient(180deg, #22272e 0%, var(--bg) 100%);
}
.hero::before {
  position: absolute;
  inset: 0;
  content: "";
  background-image:
    linear-gradient(rgba(57, 255, 136, .055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57, 255, 136, .055) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(180deg, #000, transparent 92%);
  pointer-events: none;
}
.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
  align-items: center;
  gap: clamp(24px, 4vw, 54px);
  padding: 56px 0 26px;
}
.hero-copy { min-width: 0; }
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 16px;
  color: #9fb0a8;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 1.4px;
}
.hero-kicker b { padding: 2px 7px; border: 1px solid #35594a; border-radius: 3px; color: var(--green); font-size: 9.5px; letter-spacing: 1.4px; }
.hero h1 {
  margin: 0;
  font-size: clamp(50px, 7.4vw, 92px);
  font-weight: 900;
  letter-spacing: clamp(-2px, -.4vw, -4px);
  line-height: 1;
}
.hero h1::after {
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-left: 12px;
  content: "";
  background: var(--green);
  vertical-align: 6px;
  animation: blink 1.2s steps(1) infinite;
}
@keyframes blink { 50% { opacity: .15; } }
.hero-subtitle { margin: 18px 0 0; color: var(--green); font-size: clamp(18px, 2vw, 24px); font-weight: 800; line-height: 1.4; }
.hero-lead { max-width: 520px; margin: 12px 0 0; color: var(--muted); font-size: 14px; }

.rule-panel {
  max-width: 470px;
  margin-top: 22px;
  border: 1px solid #38453f;
  border-radius: 6px;
  background: #1a1f24;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .03);
  overflow: hidden;
}
.rule-head { display: flex; align-items: center; justify-content: space-between; padding: 9px 13px; border-bottom: 1px solid #2f3a35; background: #202730; }
.rule-head span { color: #d5e4dc; font-family: var(--mono); font-size: 11px; letter-spacing: 1.2px; }
.rule-head b { padding: 1px 7px; border-radius: 3px; background: rgba(57, 255, 136, .14); color: var(--green); font-family: var(--mono); font-size: 10px; font-weight: 700; }
.rule-list { padding: 8px 13px 11px; margin: 0; list-style: none; }
.rule-list li { display: flex; align-items: baseline; gap: 10px; padding: 5px 0; border-bottom: 1px dashed #2b3531; }
.rule-list li:last-child { border-bottom: 0; }
.rule-list span { flex: none; width: 32px; color: #6f8579; font-family: var(--mono); font-size: 10px; }
.rule-list code { color: #c8e5d5; font-family: var(--mono); font-size: 11.5px; overflow-wrap: anywhere; }

.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: 48px;
  gap: 12px;
  padding: 0 26px;
  border: 1px solid transparent;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 900;
  transition: transform .18s ease, background .18s ease, color .18s ease;
}
.button-primary { background: var(--green); color: #10241a; box-shadow: 0 12px 26px rgba(57, 255, 136, .18); }
.button-primary:hover { background: #6cffab; transform: translateY(-2px); }
.button-large { min-height: 52px; padding: 0 32px; font-size: 15px; }
.button svg { width: 18px; height: 18px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.text-link { color: #bfd0c7; border-bottom: 1px dashed #47564e; font-size: 13px; font-weight: 800; }
.text-link span { display: inline-block; margin-left: 5px; color: var(--green); }

.hero-phone { justify-self: end; width: min(100%, 306px); margin: 0; }
.phone-shell {
  position: relative;
  padding: 9px;
  border: 1px solid #414c47;
  border-radius: 24px;
  background: #15191d;
  box-shadow: 0 26px 46px rgba(0, 0, 0, .55), 0 0 0 1px rgba(57, 255, 136, .1);
}
.phone-shell::before {
  position: absolute;
  top: 4px;
  left: 50%;
  z-index: 2;
  width: 58px;
  height: 4px;
  border-radius: 3px;
  content: "";
  background: #0b0e10;
  transform: translateX(-50%);
}
.phone-shell img { width: 100%; height: auto; aspect-ratio: 309 / 518; object-fit: cover; border-radius: 17px; }
.hero-phone figcaption { margin-top: 10px; color: #7f8f87; font-size: 11.5px; text-align: center; }

.json-line {
  position: relative;
  z-index: 2;
  padding: 7px 0 12px 14px;
  margin: 0 0 30px;
  border-left: 2px solid var(--green);
  color: #7f948a;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .2px;
  overflow-wrap: anywhere;
  background: linear-gradient(90deg, rgba(57, 255, 136, .05), transparent 70%);
}

/* features: four in a row */
.features { padding: 72px 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(24px, 2.7vw, 34px); 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; }
.section-heading-split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(210px, 300px); align-items: end; gap: 26px; }
.section-heading-split > p:last-child { margin: 0 0 4px; }
.feature-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.feature-card {
  position: relative;
  padding: 24px 20px 22px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: linear-gradient(180deg, rgba(57, 255, 136, .05), transparent 55%), var(--panel);
  overflow: hidden;
}
.feature-card::before { position: absolute; top: 0; left: 0; width: 100%; height: 2px; content: ""; background: var(--green); opacity: .65; }
.feature-no { display: block; margin-bottom: 12px; color: #5f7a6c; font-family: var(--mono); font-size: 11px; letter-spacing: 1.6px; }
.feature-card h3 { margin: 0 0 7px; font-size: 17px; font-weight: 900; }
.feature-card p { margin: 0; color: var(--muted); font-size: 12.5px; line-height: 1.8; }

/* shots */
.shots { padding: 72px 0 80px; }
.shot-row { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; align-items: start; }
.shot-card { margin: 0; padding: 8px 8px 0; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); overflow: hidden; }
.shot-card img { width: 100%; height: auto; aspect-ratio: 308 / 520; object-fit: cover; object-position: center top; border-radius: 5px; background: #171b20; }
.shot-card figcaption { display: flex; align-items: baseline; gap: 9px; padding: 11px 4px 12px; border-top: 1px solid var(--line); margin-top: 8px; }
.shot-card figcaption b { flex: none; color: var(--green); font-family: var(--mono); font-size: 10px; letter-spacing: 1px; }
.shot-card figcaption span { color: #b7c7be; font-size: 12px; line-height: 1.6; }

/* faq */
.faq { padding: 70px 0 76px; border-top: 1px solid var(--line); background: var(--bg-2); }
.faq-layout { display: grid; grid-template-columns: minmax(0, .76fr) minmax(0, 1.24fr); gap: clamp(26px, 4vw, 54px); }
.faq-heading { position: sticky; top: calc(var(--header-height) + 26px); align-self: start; }
.faq-list { 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 0; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary h3 { margin: 0; font-size: 15px; font-weight: 900; }
.faq-list summary i { position: relative; flex: none; width: 20px; height: 20px; border: 1px solid #3f5148; border-radius: 3px; }
.faq-list summary i::before,
.faq-list summary i::after { position: absolute; top: 50%; left: 50%; width: 8px; height: 1.5px; content: ""; background: var(--green); 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 28px 17px 0; margin: 0; color: var(--muted); font-size: 13.5px; line-height: 1.85; }

/* reviews: single column rows */
.reviews { padding: 72px 0 78px; }
.review-list { display: grid; gap: 10px; padding: 0; margin: 0; list-style: none; }
.review-card {
  display: grid;
  grid-template-columns: 178px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  padding: 15px 18px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--green);
  border-radius: 4px;
  background: var(--panel);
}
.review-meta { display: flex; flex-direction: column; gap: 2px; }
.review-meta b { color: #dcefe5; font-size: 13px; font-weight: 900; }
.review-meta time { color: #6f8378; font-family: var(--mono); font-size: 10px; }
.review-card p { margin: 0; color: #b6c5bd; font-size: 13px; line-height: 1.8; }

/* steps: three with a connecting line */
.steps { padding: 68px 0 74px; border-top: 1px solid var(--line); background: var(--bg-2); }
.step-list { position: relative; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; padding: 0; margin: 0; list-style: none; }
.step-list::before { position: absolute; top: 27px; right: 12%; left: 12%; height: 1px; content: ""; background: repeating-linear-gradient(90deg, #3d4c44 0 6px, transparent 6px 12px); }
.step-list li { position: relative; padding: 20px 20px 20px; border: 1px solid var(--line); border-radius: 6px; background: var(--panel); }
.step-list span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  margin-bottom: 12px;
  border: 1px solid var(--green);
  border-radius: 50%;
  background: #1b2420;
  color: var(--green);
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
}
.step-list h3 { margin: 0 0 6px; font-size: 16px; font-weight: 900; }
.step-list p { margin: 0; color: var(--muted); font-size: 12.5px; line-height: 1.8; }

/* download: split copy and action */
.download { padding: 28px 0 30px; }
.download-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(24px, 4vw, 54px);
  padding: 42px clamp(24px, 4vw, 50px);
  border: 1px solid #34503f;
  border-radius: 8px;
  background:
    radial-gradient(460px 220px at 100% 0%, rgba(57, 255, 136, .14), transparent 70%),
    linear-gradient(120deg, #20332a, #1a2420 78%);
}
.download-copy { min-width: 0; }
.download h2 { color: #eafff2; }
.download-copy > p:last-child { max-width: 460px; margin: 12px 0 0; color: #9fb8ab; font-size: 13.5px; }
.download-action { display: flex; flex-direction: column; align-items: flex-end; gap: 16px; }
.download-notes { display: flex; flex-direction: column; gap: 4px; padding: 0; margin: 0; list-style: none; text-align: right; }
.download-notes li { color: #8ba79a; font-family: var(--mono); font-size: 10.5px; }
.download-notes li::before { margin-right: 7px; color: var(--green); content: "//"; }

/* 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 20px; }
.footer-nav a { color: #b2c0b8; font-size: 12px; }
.footer-nav a:hover { color: var(--green); }
.footer-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 20px; margin-top: 22px; padding-top: 16px; 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: #74857c; font-size: 11.5px; line-height: 1.8; }

/* responsive */
@media (max-width: 1024px) {
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero-grid { grid-template-columns: minmax(0, 1fr) 270px; gap: 26px; }
}
@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: 44px 0 22px; }
  .hero-phone { justify-self: start; width: min(280px, 76%); }
  .rule-panel { max-width: 100%; }
  .faq-layout { grid-template-columns: 1fr; }
  .faq-heading { position: static; }
  .step-list { grid-template-columns: 1fr; }
  .step-list::before { display: none; }
  .download-inner { grid-template-columns: 1fr; }
  .download-action { align-items: flex-start; }
  .download-notes { text-align: left; }
}
@media (max-width: 600px) {
  .page-shell, .nav-shell { width: calc(100% - 30px); }
  .hero h1 { font-size: clamp(44px, 14vw, 60px); }
  .hero-lead { font-size: 13.5px; }
  .feature-grid { grid-template-columns: 1fr; }
  .shot-row { grid-template-columns: 1fr; gap: 12px; }
  .section-heading-split { grid-template-columns: 1fr; gap: 9px; }
  .section-heading-split > p:last-child { margin: 0; }
  .review-card { grid-template-columns: 1fr; gap: 6px; }
  .review-meta { flex-direction: row; align-items: baseline; gap: 10px; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 380px) {
  .brand { font-size: 17px; gap: 7px; }
  .brand img { width: 28px; height: 28px; }
  .brand-mono { display: none; }
  .nav-actions { gap: 7px; }
  .nav-download { min-height: 33px; padding: 0 9px; font-size: 11px; }
  .menu-toggle { width: 33px; height: 33px; }
  .hero h1 { font-size: 42px; }
  .hero-subtitle { font-size: 16px; }
  .rule-list code { font-size: 10.5px; }
  .button { width: 100%; }
  .download-action { width: 100%; }
}