@charset "UTF-8";

:root {
  --bg: #fff6ea;
  --bg-2: #fffcf6;
  --panel: #ffffff;
  --line: #e9ddc9;
  --ink: #26302c;
  --muted: #6f7b75;
  --teal: #1f8a70;
  --teal-2: #34a98b;
  --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: 1.75;
  overflow-x: hidden;
}
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% - 48px), var(--shell)); margin: 0 auto; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 12px;
  color: var(--teal);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
}
.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, 246, 234, .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: 20px; font-weight: 900; letter-spacing: -.3px; }
.brand img { width: 38px; height: 38px; border: 1px solid var(--line); border-radius: 50%; object-fit: contain; background: #fff; }
.brand-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 19px;
  height: 19px;
  border-radius: 50%;
  background: var(--teal);
  color: #f3fff9;
  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: 8px 0; border-bottom: 2px solid transparent; color: #6f7b75; 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: 42px;
  gap: 8px;
  padding: 0 18px;
  border: 1px solid var(--teal);
  border-radius: 999px;
  background: var(--teal);
  color: #f3fff9;
  font-size: 13px;
  font-weight: 900;
  white-space: nowrap;
  transition: background .18s ease, color .18s ease;
}
.nav-download:hover { background: transparent; color: var(--teal); }
.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: 50%; 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: progress line + centered phone + shelf rail */
.hero { position: relative; overflow: hidden; padding: 44px 0 52px; border-bottom: 1px solid var(--line); background: linear-gradient(180deg, #fffdf8 0%, var(--bg) 62%); }
.hero-progress { position: absolute; top: 0; left: 0; right: 0; height: 3px; background: #efe3d0; }
.hero-progress i { display: block; width: 46%; height: 100%; background: linear-gradient(90deg, var(--teal), var(--teal-2)); }
.hero-copy { max-width: 660px; margin: 0 auto; text-align: center; }
.hero-kicker { margin: 0 0 10px; color: #7c8983; font-family: var(--mono); font-size: 11px; letter-spacing: 2.4px; }
.hero h1 { margin: 0; font-size: clamp(42px, 6vw, 76px); font-weight: 900; letter-spacing: clamp(-2px, -.4vw, -3px); line-height: 1.04; }
.hero-subtitle { margin: 14px 0 0; color: var(--teal); font-size: clamp(17px, 2vw, 23px); font-weight: 800; }
.hero-lead { max-width: 520px; margin: 10px auto 0; color: var(--muted); font-size: 14.5px; }
.hero-actions { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 18px; margin-top: 22px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  gap: 12px;
  padding: 0 28px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 900;
  transition: transform .18s ease, background .18s ease, color .18s ease;
}
.button-primary { background: var(--teal); color: #f3fff9; box-shadow: 0 16px 28px rgba(31, 138, 112, .22); }
.button-primary:hover { background: #176d59; transform: translateY(-2px); }
.button-large { min-height: 54px; padding: 0 34px; font-size: 15px; }
.text-link { color: #6f7b75; border-bottom: 1px dashed #bfae94; font-size: 13px; font-weight: 800; }
.text-link span { display: inline-block; margin-left: 4px; color: var(--teal); }

.phone-stage { display: flex; justify-content: center; margin-top: 30px; }
.phone {
  position: relative;
  width: min(272px, 74vw);
  padding: 9px;
  border-radius: 34px;
  background: #26302c;
  box-shadow: 0 26px 44px rgba(38, 48, 44, .22);
}
.phone-notch { position: absolute; top: 15px; left: 50%; z-index: 2; width: 62px; height: 6px; border-radius: 999px; background: #0f1512; transform: translateX(-50%); }
.phone img { width: 100%; height: auto; aspect-ratio: 5 / 7; object-fit: cover; border-radius: 26px; }

.shelf { margin-top: 28px; }
.shelf-track {
  display: flex;
  justify-content: safe center;
  gap: 12px;
  padding: 4px 2px 14px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
}
.book {
  display: flex;
  flex: 0 0 auto;
  flex-direction: column;
  justify-content: flex-end;
  width: 132px;
  height: 176px;
  padding: 12px;
  border-radius: 8px 8px 4px 4px;
  color: #f7fffb;
  scroll-snap-align: start;
  background: linear-gradient(160deg, #2c9d80, #176c57);
  box-shadow: inset 6px 0 0 rgba(0, 0, 0, .16), 0 10px 18px rgba(38, 48, 44, .12);
}
.book:nth-child(2) { background: linear-gradient(160deg, #e7b564, #c98a34); }
.book:nth-child(3) { background: linear-gradient(160deg, #7f8f9e, #4d5c6b); }
.book:nth-child(4) { background: linear-gradient(160deg, #d98a72, #b25e46); }
.book:nth-child(5) { background: linear-gradient(160deg, #8c9c5a, #647338); }
.book b { font-size: 14px; font-weight: 900; line-height: 1.4; }
.book span { margin-top: 2px; font-family: var(--mono); font-size: 10px; opacity: .85; }
.shelf-hint { margin: 0; color: #8b968f; font-family: var(--mono); font-size: 10.5px; text-align: center; }

/* features: icon-left rows in 2 x 2 */
.features { padding: 70px 0 76px; 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, 2.8vw, 34px); font-weight: 900; letter-spacing: -.7px; line-height: 1.32; }
.section-heading > p:last-child { max-width: 610px; margin: 10px 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(2, minmax(0, 1fr)); gap: 14px; }
.feature-card {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  column-gap: 14px;
  align-items: start;
  padding: 22px 22px 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
}
.feature-icon {
  display: flex;
  grid-row: span 2;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: #e7f4ef;
  color: var(--teal);
  font-size: 17px;
  font-weight: 900;
}
.feature-card h3 { margin: 2px 0 5px; font-size: 17px; font-weight: 900; }
.feature-card p { grid-column: 2; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }

/* shots: horizontal rail */
.shots { padding: 70px 0 76px; }
.shot-rail {
  display: flex;
  gap: 14px;
  padding: 2px 2px 14px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
}
.shot-card { flex: 0 0 auto; width: clamp(220px, 24vw, 272px); margin: 0; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); overflow: hidden; scroll-snap-align: start; }
.shot-card img { width: 100%; height: auto; aspect-ratio: 5 / 7; object-fit: cover; object-position: center 18%; }
.shot-card figcaption { display: flex; align-items: baseline; gap: 8px; padding: 11px 13px 12px; border-top: 1px solid var(--line); }
.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: 13px; 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-layout { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: clamp(24px, 4vw, 52px); }
.faq-heading { position: sticky; top: calc(var(--header-height) + 24px); 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: 14px; padding: 16px 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 #d8cbb6; 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 26px 16px 0; margin: 0; color: var(--muted); font-size: 13.5px; line-height: 1.85; }

/* reviews */
.reviews { padding: 72px 0 78px; }
.review-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; padding: 0; margin: 0; list-style: none; }
.review-card { padding: 18px 20px; border: 1px solid var(--line); border-left: 3px solid var(--teal); border-radius: 10px; background: var(--panel); }
.review-meta { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 6px; padding-bottom: 8px; margin-bottom: 8px; border-bottom: 1px dashed var(--line); }
.review-meta b { color: var(--teal); font-size: 13px; font-weight: 900; }
.review-meta time { color: #9a8f7d; font-family: var(--mono); font-size: 10px; }
.review-card p { margin: 0; color: #5b665f; font-size: 13px; line-height: 1.8; }

/* steps: horizontal with connector */
.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: 18px; padding: 0; margin: 0; list-style: none; }
.step-list::before { position: absolute; top: 21px; left: 8%; right: 8%; height: 1px; content: ""; background: repeating-linear-gradient(90deg, #cfe2d9 0 10px, transparent 10px 18px); }
.step-list li { position: relative; padding: 52px 18px 16px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); text-align: center; }
.step-list li::before {
  position: absolute;
  top: 10px;
  left: 50%;
  width: 22px;
  height: 22px;
  border: 1px solid var(--teal);
  border-radius: 50%;
  background: #e7f4ef;
  content: "";
  transform: translateX(-50%);
}
.step-list span { display: block; margin-bottom: 4px; color: var(--teal); font-family: var(--mono); font-size: 11px; font-weight: 700; letter-spacing: 2px; }
.step-list h3 { margin: 0 0 5px; font-size: 16px; font-weight: 900; }
.step-list p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }

/* download */
.download { padding: 24px 0 56px; }
.download-inner {
  padding: 42px clamp(22px, 5vw, 54px) 38px;
  border: 1px solid #cfe4da;
  border-radius: 18px;
  background:
    radial-gradient(360px 200px at 94% 0%, rgba(255, 255, 255, .9), transparent 70%),
    linear-gradient(125deg, #eaf7f1, #f7fdf9);
  text-align: center;
}
.download h2 { max-width: 620px; margin: 0 auto; }
.download-inner > p { max-width: 500px; margin: 10px auto 22px; color: #5b665f; font-size: 14px; }
.download-notes { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 20px; padding: 18px 0 0; margin: 26px 0 0; border-top: 1px solid #dcebe3; list-style: none; }
.download-notes li { color: #5f7068; font-family: var(--mono); font-size: 11px; }
.download-notes li::before { margin-right: 7px; content: "▸"; color: var(--teal); }

/* footer */
.site-footer { padding: 42px 0 50px; border-top: 1px solid var(--line); background: var(--bg); }
.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: 3px 0 0; color: var(--muted); font-size: 12px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.footer-nav a { color: #6f7b75; font-size: 12px; }
.footer-nav a:hover { color: var(--teal); }
.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: #93897a; font-size: 11.5px; line-height: 1.8; }

/* responsive */
@media (max-width: 1024px) {
  .feature-grid { grid-template-columns: 1fr; }
}
@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(120, 100, 70, .14);
  }
  .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); }
  .faq-layout { grid-template-columns: 1fr; }
  .faq-heading { position: static; }
  .review-list { grid-template-columns: 1fr; }
  .step-list { grid-template-columns: 1fr; }
  .step-list::before { top: 6%; bottom: 6%; left: 50%; right: auto; width: 1px; height: auto; background: repeating-linear-gradient(180deg, #cfe2d9 0 10px, transparent 10px 18px); }
}
@media (max-width: 600px) {
  .page-shell, .nav-shell { width: calc(100% - 32px); }
  .hero { padding: 36px 0 44px; }
  .hero h1 { font-size: clamp(34px, 11.5vw, 48px); }
  .hero-lead { font-size: 14px; }
  .phone { width: min(240px, 70vw); }
  .shot-card { width: 82%; }
  .section-heading-split { grid-template-columns: 1fr; gap: 9px; }
  .section-heading-split > p:last-child { margin: 0; }
  .footer-grid { grid-template-columns: 1fr; }
  .download-notes li { font-size: 10.5px; }
}
@media (max-width: 380px) {
  .brand { font-size: 15px; gap: 6px; }
  .brand img { width: 30px; height: 30px; }
  .brand-tag { display: none; }
  .nav-actions { gap: 7px; }
  .nav-download { min-height: 34px; padding: 0 9px; font-size: 11px; gap: 5px; }
  .nav-download svg { width: 14px; height: 14px; }
  .menu-toggle { width: 34px; height: 34px; }
  .hero h1 { font-size: 32px; }
  .hero-subtitle { font-size: 16px; }
  .button { width: 100%; }
  .book { width: 112px; height: 152px; }
}