@charset "UTF-8";

:root {
  --bg: #ffffff;
  --bg-2: #f1faf8;
  --panel: #ffffff;
  --line: #d5ebe7;
  --ink: #102a27;
  --muted: #5d7a77;
  --teal: #12a594;
  --teal-deep: #0a7d70;
  --teal-soft: #e4f7f4;
  --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(--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(--teal); outline-offset: 4px; }
.page-shell { width: min(calc(100% - 44px), var(--shell)); margin: 0 auto; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 12px;
  color: var(--teal-deep);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2.2px;
  line-height: 1.4;
}
.eyebrow::before { width: 14px; height: 2px; content: ""; background: currentColor; }

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, .95);
  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: 21px; font-weight: 900; letter-spacing: -.3px; }
.brand img { width: 36px; height: 36px; border-radius: 11px; object-fit: contain; background: var(--teal-soft); }
.brand-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 6px;
  background: var(--teal);
  color: #fff;
  font-family: var(--mono);
  font-size: 10px;
  font-style: normal;
  font-weight: 900;
}
.primary-nav { margin-left: auto; }
.primary-nav ul { display: flex; align-items: center; gap: clamp(11px, 1.8vw, 24px); padding: 0; margin: 0; list-style: none; }
.primary-nav a { display: block; padding: 7px 0; border-bottom: 2px solid transparent; color: #4a6764; font-size: 13px; font-weight: 700; }
.primary-nav a:hover { border-bottom-color: var(--teal); color: var(--ink); }
.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 16px;
  border: 1px solid var(--teal);
  border-radius: 10px;
  background: var(--teal);
  color: #fff;
  font-size: 13px;
  font-weight: 900;
  white-space: nowrap;
  transition: background .18s ease, color .18s ease;
}
.nav-download:hover { background: #fff; color: var(--teal-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: 10px; background: transparent; cursor: pointer; }
.menu-toggle span { display: block; width: 16px; 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: editor panel + preview card + attr bar */
.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(560px 340px at 92% 4%, rgba(18, 165, 148, .16), transparent 72%),
    radial-gradient(420px 260px at 2% 92%, rgba(18, 165, 148, .09), transparent 74%),
    linear-gradient(180deg, #f7fdfc 0%, #ffffff 100%);
}
.hero::before {
  position: absolute;
  inset: 0;
  content: "";
  background-image:
    linear-gradient(rgba(18, 165, 148, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(18, 165, 148, .07) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: linear-gradient(180deg, #000 0%, transparent 78%);
  pointer-events: none;
}
.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(250px, .85fr);
  align-items: start;
  gap: clamp(26px, 4vw, 54px);
  padding: 52px 0 22px;
}
.hero-left { min-width: 0; }
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 14px;
  color: #3d5a57;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 1.4px;
}
.hero-kicker b {
  padding: 3px 7px;
  border-radius: 5px;
  background: var(--teal);
  color: #fff;
  font-size: 9.5px;
  font-weight: 900;
  letter-spacing: 1.1px;
}
.hero h1 {
  margin: 0;
  font-size: clamp(54px, 7.4vw, 92px);
  font-weight: 900;
  letter-spacing: clamp(-2px, -.4vw, -4px);
  line-height: 1;
}
.hero-subtitle {
  margin: 14px 0 0;
  color: var(--teal-deep);
  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: 14.5px; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 18px; margin-top: 22px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  gap: 12px;
  padding: 0 26px;
  border: 1px solid transparent;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 900;
  transition: transform .18s ease, background .18s ease, color .18s ease;
}
.button-primary { background: var(--teal); color: #fff; box-shadow: 0 12px 24px rgba(18, 165, 148, .24); }
.button-primary:hover { background: var(--teal-deep); transform: translateY(-2px); }
.button-large { min-height: 52px; padding: 0 32px; font-size: 15px; }
.text-link { color: #2f4f4c; border-bottom: 1px dashed #9dcbc4; font-size: 13px; font-weight: 800; }
.text-link span { display: inline-block; margin-left: 5px; color: var(--teal); }

.editor-panel {
  max-width: 520px;
  padding: 18px 20px 20px;
  margin-top: 26px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 16px 34px rgba(15, 78, 71, .07);
}
.panel-head { display: flex; align-items: center; justify-content: space-between; padding: 0 0 10px; margin: 0 0 6px; border-bottom: 1px dashed var(--line); font-size: 13px; font-weight: 900; }
.panel-head i { color: var(--teal-deep); font-family: var(--mono); font-size: 10px; font-style: normal; }
.field-row { display: flex; align-items: center; gap: 12px; padding: 8px 0; border-bottom: 1px solid #eef7f5; }
.field-key { flex: none; width: 36px; color: #7c9693; font-size: 12px; }
.field-val { color: var(--ink); font-size: 13px; font-weight: 700; }
.slider-row { display: flex; align-items: center; gap: 10px; padding: 7px 0 3px; color: #7c9693; font-size: 10.5px; }
.slider { position: relative; flex: 1; display: block; height: 4px; border-radius: 999px; background: #e6f2f0; }
.slider i { position: absolute; top: 0; left: 0; height: 4px; border-radius: 999px; background: var(--teal); }
.slider b { position: absolute; top: 50%; width: 12px; height: 12px; border: 2px solid var(--teal); border-radius: 50%; background: #fff; transform: translate(-50%, -50%); }
.panel-note { margin: 10px 0 0; color: var(--teal-deep); font-size: 12px; }

.preview-wrap { min-width: 0; justify-self: center; }
.preview-card {
  position: relative;
  width: min(100%, 268px);
  padding: 12px 12px 16px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
  box-shadow: 0 20px 44px rgba(9, 74, 67, .16);
  transform: rotate(1.4deg);
}
.preview-top { display: flex; align-items: center; gap: 9px; padding: 2px 2px 10px; }
.preview-ava {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--teal);
  color: #fff;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 900;
}
.preview-name { display: flex; flex-direction: column; line-height: 1.3; }
.preview-name b { font-size: 13px; }
.preview-name small { color: var(--muted); font-size: 10px; }
.preview-shot { margin: 0; overflow: hidden; border-radius: 12px; background: var(--teal-soft); }
.preview-shot img { width: 100%; height: auto; aspect-ratio: 7 / 12; object-fit: cover; object-position: center 8%; }
.preview-quote {
  position: absolute;
  left: -14px;
  bottom: 46px;
  max-width: 190px;
  padding: 7px 12px;
  border-radius: 12px 12px 12px 3px;
  background: var(--teal);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  box-shadow: 0 8px 18px rgba(18, 165, 148, .3);
  transform: rotate(-1.4deg);
}
.preview-hint { margin: 14px 0 0; color: #8aa5a2; font-family: var(--mono); font-size: 10px; letter-spacing: 1.6px; text-align: center; }

.attr-bar {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  padding: 16px 18px;
  margin: 6px 0 34px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, .92);
  list-style: none;
}
.attr-bar li { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 8px; min-width: 0; padding-right: 6px; }
.attr-bar b { color: #6c8784; font-size: 11.5px; font-weight: 700; }
.attr-bar .bar { display: block; height: 5px; border-radius: 999px; background: #e6f2f0; overflow: hidden; }
.attr-bar .bar i { display: block; height: 5px; background: linear-gradient(90deg, #6fd8c8, var(--teal)); }
.attr-bar em { min-width: 18px; color: var(--teal-deep); font-family: var(--mono); font-size: 11px; font-style: normal; text-align: right; }

/* features: four in a row */
.features { padding: 70px 0 74px; 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: 580px; margin: 10px 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: 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 {
  padding: 22px 18px 20px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--teal);
  border-radius: 4px 4px 12px 12px;
  background: #fff;
}
.feature-no { display: block; margin-bottom: 10px; color: var(--teal); font-family: var(--mono); font-size: 11px; font-weight: 700; letter-spacing: 1.4px; }
.feature-card h3 { margin: 0 0 6px; font-size: 16px; font-weight: 900; }
.feature-card p { margin: 0; color: var(--muted); font-size: 12.5px; line-height: 1.8; }

/* shots: staggered three */
.shots { padding: 72px 0 86px; }
.shot-row { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; align-items: start; }
.shot-card { margin: 0; padding: 10px 10px 0; border: 1px solid var(--line); border-radius: 14px; background: #fff; box-shadow: 0 12px 26px rgba(15, 78, 71, .06); }
.shot-card:nth-child(2) { transform: translateY(26px); }
.shot-card img { width: 100%; height: auto; aspect-ratio: 7 / 12; object-fit: cover; object-position: center 6%; border-radius: 8px; }
.shot-card figcaption { display: flex; align-items: baseline; gap: 8px; padding: 11px 4px 13px; }
.shot-card figcaption b { color: var(--teal); 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: var(--muted); font-size: 10.5px; font-weight: 500; }

/* faq */
.faq { padding: 70px 0 76px; border-top: 1px solid var(--line); background: var(--bg-2); }
.faq-top { text-align: center; }
.faq-top .eyebrow { justify-content: center; }
.faq-top > p:last-child { margin-left: auto; margin-right: auto; }
.faq-list { max-width: 860px; margin: 0 auto; border-top: 1px solid var(--line); background: #fff; border-radius: 12px; padding: 0 22px; }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list details:last-child { border-bottom: 0; }
.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: 22px; height: 22px; border: 1px solid #b8ddd7; 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(--teal); 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: numbered single column */
.reviews { padding: 72px 0 78px; }
.review-list { padding: 0; margin: 0; list-style: none; border-top: 1px dashed var(--line); counter-reset: rev; }
.review-card { display: grid; grid-template-columns: 46px minmax(0, 1fr); gap: 4px 14px; padding: 18px 0; border-bottom: 1px dashed var(--line); counter-increment: rev; }
.review-card::before { content: "0" counter(rev); grid-row: 2; align-self: start; color: #a7c6c1; font-family: var(--mono); font-size: 12px; }
.review-meta { grid-column: 2; display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 4px 14px; }
.review-meta b { color: var(--teal-deep); font-size: 13px; font-weight: 900; }
.review-meta time { color: #8aa5a2; font-family: var(--mono); font-size: 10px; }
.review-card p { grid-column: 2; margin: 0; color: #3f5c59; font-size: 13px; line-height: 1.8; }

/* steps */
.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 li { position: relative; padding: 20px 20px 18px; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.step-list li::after { position: absolute; top: 34px; right: -12px; content: "→"; color: #9fd0c9; font-size: 13px; }
.step-list li:last-child::after { display: none; }
.step-list span { display: block; margin-bottom: 8px; color: var(--teal); font-family: var(--mono); font-size: 20px; font-weight: 700; line-height: 1; }
.step-list h3 { margin: 0 0 5px; font-size: 16px; font-weight: 900; }
.step-list p { margin: 0; color: var(--muted); font-size: 12.5px; line-height: 1.8; }

/* download */
.download { padding: 26px 0; }
.download-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 18px 30px;
  padding: 40px clamp(22px, 4.4vw, 52px) 34px;
  border-radius: 16px;
  background:
    radial-gradient(360px 200px at 92% 0%, rgba(255, 255, 255, .22), transparent 70%),
    linear-gradient(118deg, #10a091, #2fc0ac 88%);
  color: #f2fffc;
}
.download-copy { min-width: 0; }
.download .eyebrow { color: #d9fff8; }
.download h2 { max-width: 560px; color: #fff; }
.download-copy > p:last-child { max-width: 520px; margin: 10px 0 0; color: #ddf7f2; font-size: 13.5px; }
.download .button-primary { background: #08302b; color: #eafffb; box-shadow: 0 12px 24px rgba(4, 52, 46, .3); }
.download .button-primary:hover { background: #0d443c; }
.download-notes { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 8px 22px; padding: 18px 0 0; margin: 0; border-top: 1px solid rgba(255, 255, 255, .26); list-style: none; }
.download-notes li { color: #e2fbf6; font-family: var(--mono); font-size: 11px; }
.download-notes li::before { margin-right: 7px; 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 36px; 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: #3f5c59; font-size: 12px; }
.footer-nav a:hover { color: var(--teal-deep); }
.footer-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 18px; margin-top: 20px; 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: #809a97; font-size: 11.5px; line-height: 1.8; }

/* responsive */
@media (max-width: 1024px) {
  .feature-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 22px 14px;
    border-bottom: 1px solid var(--line);
    background: #fff;
    box-shadow: 0 16px 24px rgba(9, 60, 54, .12);
  }
  .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 18px; }
  .preview-wrap { justify-self: start; width: min(280px, 82%); }
  .preview-card { transform: rotate(0); }
  .step-list { grid-template-columns: 1fr; }
  .step-list li::after { display: none; }
  .download-inner { grid-template-columns: 1fr; }
  .download .button { justify-self: start; }
}
@media (max-width: 600px) {
  .page-shell, .nav-shell { width: calc(100% - 30px); }
  .hero h1 { font-size: clamp(46px, 15vw, 62px); }
  .attr-bar { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px 16px; padding: 14px; }
  .feature-grid { grid-template-columns: 1fr; }
  .shot-row { grid-template-columns: 1fr; gap: 12px; }
  .shot-card:nth-child(2) { transform: none; }
  .shot-card img { aspect-ratio: 7 / 10; }
  .section-heading-split { grid-template-columns: 1fr; gap: 8px; }
  .section-heading-split > p:last-child { margin: 0; }
  .faq-list { padding: 0 15px; }
  .review-card { grid-template-columns: 30px minmax(0, 1fr); }
  .download-notes li { font-size: 10.5px; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 380px) {
  .brand { font-size: 17px; gap: 7px; }
  .brand img { width: 30px; height: 30px; }
  .brand-tag { display: none; }
  .nav-actions { gap: 7px; }
  .nav-download { min-height: 34px; padding: 0 10px; font-size: 11px; gap: 5px; }
  .nav-download svg { width: 14px; height: 14px; }
  .menu-toggle { width: 34px; height: 34px; }
  .hero h1 { font-size: 46px; }
  .hero-subtitle { font-size: 16px; }
  .button { width: 100%; }
  .attr-bar { grid-template-columns: 1fr; }
  .review-card { grid-template-columns: 1fr; }
  .review-card::before { display: none; }
  .review-meta, .review-card p { grid-column: 1; }
}