@charset "UTF-8";

:root {
  --paper: #f7e9f0;
  --paper-2: #fdf6f9;
  --card: #ffffff;
  --line: #e6d2de;
  --ink: #3b2b45;
  --muted: #7d6b88;
  --violet: #7a5c8e;
  --violet-deep: #553d66;
  --rose: #d78aa9;
  --shell: 1160px;
  --header-height: 68px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 16px); }
body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background: var(--paper-2);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
}
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(--violet); outline-offset: 3px; }
.page-shell { width: min(calc(100% - 44px), var(--shell)); margin: 0 auto; }
.eyebrow {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 12px;
  color: var(--violet);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 3px;
  line-height: 1.4;
}
.eyebrow::before { width: 22px; height: 1px; content: ""; background: currentColor; }

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  border-bottom: 1px solid var(--line);
  background: rgba(253, 246, 249, .93);
  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: 19px; font-weight: 900; letter-spacing: .5px; }
.brand img { width: 36px; height: 36px; border-radius: 50%; object-fit: contain; background: var(--paper); }
.primary-nav { margin-left: auto; }
.primary-nav ul { display: flex; align-items: center; gap: clamp(10px, 1.7vw, 22px); padding: 0; margin: 0; list-style: none; }
.primary-nav a { display: block; padding: 6px 0; border-bottom: 1px solid transparent; color: var(--muted); font-size: 13px; font-weight: 700; }
.primary-nav a:hover { border-bottom-color: var(--rose); color: var(--violet-deep); }
.nav-actions { display: flex; align-items: center; flex: none; gap: 9px; }
.nav-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  gap: 7px;
  padding: 0 16px;
  border: 1px solid var(--violet);
  border-radius: 3px;
  background: var(--violet);
  color: #fff8fc;
  font-size: 12.5px;
  font-weight: 900;
  white-space: nowrap;
  transition: background .18s ease, color .18s ease;
}
.nav-download:hover { background: transparent; color: var(--violet); }
.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: 50%; 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: vertical rail + two-column book table */
.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(680px 420px at 92% -10%, rgba(215, 138, 169, .22), transparent 68%),
    linear-gradient(180deg, var(--paper) 0%, var(--paper-2) 82%);
}
.hero::after {
  position: absolute;
  top: 0;
  right: 0;
  width: 46%;
  height: 100%;
  content: "";
  background-image: repeating-linear-gradient(90deg, rgba(122, 92, 142, .07) 0 1px, transparent 1px 34px);
  pointer-events: none;
}
.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: clamp(20px, 3.4vw, 48px);
  align-items: stretch;
  padding: 44px 0 52px;
}
.hero-rail {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 24px 0;
  border-left: 1px solid var(--line);
}
.rail-mark { color: var(--rose); font-size: 10px; letter-spacing: 2px; writing-mode: vertical-rl; }
.hero-rail h1 {
  margin: 0;
  color: var(--violet-deep);
  font-size: clamp(44px, 4.6vw, 62px);
  font-weight: 900;
  letter-spacing: 8px;
  line-height: 1.1;
  writing-mode: vertical-rl;
  text-orientation: upright;
}
.hero-subtitle {
  margin: 0;
  color: var(--rose);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 3px;
  line-height: 1.5;
  writing-mode: vertical-rl;
}
.hero-shelf { min-width: 0; }
.tag-line {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 26px;
  padding: 0 0 10px;
  margin: 0 0 20px;
  border-bottom: 1px solid var(--line);
  list-style: none;
  counter-reset: tag;
}
.tag-line li { position: relative; color: var(--muted); font-size: 11.5px; font-weight: 700; letter-spacing: 1.6px; }
.tag-line li + li::before { position: absolute; left: -14px; content: "/"; color: var(--line); }
.hero-lead { max-width: 640px; margin: 0 0 22px; color: var(--muted); font-size: 14px; }
.shelf-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  padding: 0;
  margin: 0;
  list-style: none;
}
.shelf-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  padding: 11px 14px 11px 0;
  border-radius: 2px;
  background: var(--card);
  box-shadow: 0 1px 0 rgba(122, 92, 142, .08);
  font-size: 13px;
}
.shelf-list .chip { flex: none; width: 5px; height: 26px; border-radius: 2px; }
.chip-a { background: #d78aa9; }
.chip-b { background: #7a5c8e; }
.chip-c { background: #e0b3c7; }
.chip-d { background: #9b7fae; }
.chip-e { background: #c98fa8; }
.chip-f { background: #b49cc4; }
.shelf-list b { flex: 1; min-width: 0; overflow: hidden; font-size: 13.5px; font-weight: 800; white-space: nowrap; text-overflow: ellipsis; }
.shelf-list span { flex: none; color: var(--muted); font-size: 11px; }
.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: 3px;
  font-size: 14px;
  font-weight: 900;
  transition: transform .18s ease, background .18s ease, color .18s ease;
}
.button-primary { background: var(--violet); color: #fff8fc; box-shadow: 0 12px 24px rgba(122, 92, 142, .24); }
.button-primary:hover { background: var(--violet-deep); transform: translateY(-2px); }
.button-large { min-height: 52px; padding: 0 30px; font-size: 15px; }
.text-link { color: var(--violet-deep); border-bottom: 1px dashed var(--rose); font-size: 13px; font-weight: 800; }
.text-link span { margin-left: 4px; color: var(--rose); }

/* features: four in a row */
.features { padding: 68px 0 72px; background: var(--card); }
.section-heading { margin-bottom: 30px; }
.section-heading h2, .download h2 { margin: 0; font-size: clamp(24px, 2.7vw, 33px); font-weight: 900; letter-spacing: -.4px; line-height: 1.35; }
.section-heading > p:last-child { max-width: 600px; margin: 10px 0 0; color: var(--muted); font-size: 13.5px; }
.section-heading-split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(200px, 280px); align-items: end; gap: 24px; }
.section-heading-split > p:last-child { margin: 0 0 4px; }
.feature-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; border-top: 1px solid var(--line); }
.feature-card { padding: 24px 20px 4px 0; border-right: 1px solid var(--line); }
.feature-card + .feature-card { padding-left: 20px; }
.feature-card:last-child { border-right: 0; }
.feature-no { display: block; margin-bottom: 10px; color: var(--rose); font-size: 11px; font-weight: 800; letter-spacing: 2px; }
.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: 1.85; }

/* shots: 2 x 2 */
.shots { padding: 66px 0 74px; border-top: 1px solid var(--line); background: var(--paper); }
.shot-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.shot-card { margin: 0; border: 1px solid var(--line); border-radius: 4px; background: var(--card); overflow: hidden; }
.shot-card img { width: 100%; height: auto; aspect-ratio: 3 / 4.4; object-fit: cover; object-position: center top; }
.shot-card figcaption { display: flex; align-items: baseline; gap: 9px; padding: 11px 13px 12px; border-top: 1px solid var(--line); }
.shot-card figcaption b { color: var(--rose); font-size: 10px; font-weight: 800; letter-spacing: 1px; }
.shot-card figcaption span { display: flex; flex-direction: column; font-size: 13px; font-weight: 800; line-height: 1.45; }
.shot-card figcaption small { color: var(--muted); font-size: 10.5px; font-weight: 500; }

/* faq */
.faq { padding: 66px 0 70px; background: var(--card); }
.faq-heading { text-align: center; margin-bottom: 26px; }
.faq-heading .eyebrow { justify-content: center; }
.faq-heading > p:last-child { margin: 10px auto 0; }
.faq-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 34px; }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list details:first-child, .faq-list details:nth-child(2) { border-top: 1px solid var(--line); }
.faq-list summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 15px 0;
  cursor: pointer;
  list-style: none;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary h3 { margin: 0; font-size: 14.5px; font-weight: 800; }
.faq-list summary i { position: relative; flex: none; width: 18px; height: 18px; border-radius: 50%; background: var(--paper); }
.faq-list summary i::before,
.faq-list summary i::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 8px;
  height: 1.5px;
  content: "";
  background: var(--violet);
  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 18px 16px 0; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.85; }

/* reviews: single wide column */
.reviews { padding: 66px 0 72px; border-top: 1px solid var(--line); background: var(--paper-2); }
.review-list { display: grid; grid-template-columns: 1fr; gap: 0; padding: 0; margin: 0; list-style: none; border-top: 1px solid var(--line); }
.review-card { display: grid; grid-template-columns: 168px minmax(0, 1fr); align-items: start; gap: 18px; padding: 17px 0; border-bottom: 1px solid var(--line); }
.review-meta { display: flex; flex-direction: column; gap: 3px; }
.review-meta b { color: var(--violet-deep); font-size: 13px; font-weight: 900; }
.review-meta time { color: #a08fac; font-size: 10.5px; letter-spacing: .4px; }
.review-card p { margin: 0; color: #5f4d6b; font-size: 13px; line-height: 1.8; }

/* steps */
.steps { padding: 64px 0 70px; background: var(--card); }
.steps-layout { display: grid; grid-template-columns: minmax(0, .72fr) minmax(0, 1.28fr); gap: clamp(22px, 3vw, 46px); align-items: start; }
.step-list { display: grid; gap: 10px; padding: 0; margin: 0; list-style: none; }
.step-list li { display: grid; grid-template-columns: 52px minmax(0, 1fr); align-items: start; gap: 14px; padding: 14px 16px; border-left: 2px solid var(--rose); background: var(--paper); }
.step-list span { color: var(--violet); font-size: 20px; font-weight: 900; line-height: 1.3; letter-spacing: 1px; }
.step-list h3 { margin: 0 0 3px; font-size: 15.5px; font-weight: 900; }
.step-list p { margin: 0; color: var(--muted); font-size: 12.5px; line-height: 1.75; }

/* download */
.download { padding: 26px 0 46px; background: var(--paper-2); }
.download-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 20px 34px;
  padding: 40px clamp(22px, 4vw, 46px) 34px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--violet);
  background: var(--card);
}
.download .eyebrow { color: var(--rose); }
.download h2 { color: var(--violet-deep); }
.download-copy > p:last-child { margin: 9px 0 0; color: var(--muted); font-size: 13px; }
.download .button-primary { box-shadow: none; }
.download-notes { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 6px 22px; padding: 16px 0 0; margin: 0; border-top: 1px solid var(--line); list-style: none; }
.download-notes li { color: var(--muted); font-size: 11px; }
.download-notes li::before { margin-right: 7px; content: "·"; color: var(--rose); font-weight: 900; }

/* footer */
.site-footer { padding: 38px 0 46px; border-top: 1px solid var(--line); background: var(--paper); }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 16px 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: 7px 20px; }
.footer-nav a { color: var(--violet-deep); font-size: 12px; }
.footer-nav a:hover { color: var(--rose); }
.footer-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 7px 18px; margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--line); color: var(--muted); font-size: 11.5px; }
.footer-meta p { margin: 0; }
.footer-meta a { color: var(--muted); }
.disclaimer { grid-column: 1 / -1; margin: 0; color: #98899f; font-size: 11px; line-height: 1.8; }

@media (max-width: 1024px) {
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0; }
  .feature-card { padding: 22px 18px 22px 0; border-bottom: 1px solid var(--line); }
  .feature-card + .feature-card { padding-left: 0; }
  .feature-card:nth-child(2n) { padding-left: 18px; border-right: 0; }
  .faq-list { grid-template-columns: 1fr; gap: 0; }
  .faq-list details:nth-child(2) { border-top: 0; }
  .steps-layout { 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 22px 14px;
    border-bottom: 1px solid var(--line);
    background: var(--paper-2);
    box-shadow: 0 14px 24px rgba(90, 60, 100, .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: 32px 0 40px; }
  .hero-rail {
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
    gap: 6px;
    padding: 0 0 14px;
    border-left: 0;
    border-bottom: 1px solid var(--line);
  }
  .hero-rail h1, .hero-subtitle, .rail-mark { writing-mode: horizontal-tb; }
  .rail-mark { display: none; }
  .hero-rail h1 { font-size: 40px; letter-spacing: 3px; white-space: nowrap; }
  .hero-subtitle { font-size: 13px; letter-spacing: 1px; }
  .review-card { grid-template-columns: 1fr; gap: 6px; }
  .review-meta { flex-direction: row; align-items: baseline; gap: 12px; }
  .download-inner { grid-template-columns: 1fr; }
  .download .button { justify-self: start; }
}
@media (max-width: 860px) {
  .shot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 600px) {
  .page-shell, .nav-shell { width: calc(100% - 30px); }
  .hero-rail h1 { font-size: 34px; }
  .shelf-list { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card, .feature-card:nth-child(2n) { padding: 18px 0; border-right: 0; }
  .shot-grid { grid-template-columns: 1fr; }
  .shot-card img { aspect-ratio: 3 / 3.6; }
  .hero-actions { flex-direction: column; align-items: flex-start; gap: 12px; }
  .section-heading-split { grid-template-columns: 1fr; gap: 8px; }
  .section-heading-split > p:last-child { margin: 0; }
  .download .button { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 380px) {
  .brand { font-size: 16px; gap: 7px; }
  .brand img { width: 28px; height: 28px; }
  .nav-actions { gap: 7px; }
  .nav-download { min-height: 34px; padding: 0 9px; font-size: 11px; gap: 4px; }
  .nav-download svg { width: 13px; height: 13px; }
  .menu-toggle { width: 34px; height: 34px; }
  .hero-rail h1 { font-size: 29px; letter-spacing: 1px; }
  .hero-subtitle { font-size: 11.5px; }
  .tag-line { gap: 0 18px; }
  .tag-line li + li::before { left: -10px; }
  .shelf-list b { font-size: 12.5px; }
  .step-list li { grid-template-columns: 40px minmax(0, 1fr); gap: 10px; }
}