@charset "UTF-8";

:root {
  --paper: #FBF4E6;
  --paper-2: #F4E8D3;
  --card: #FFFDF7;
  --ink: #2B2118;
  --muted: #7A6A58;
  --kraft: #B4763C;
  --kraft-deep: #8C5524;
  --red: #D0453B;
  --line: #E0CFB4;
  --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(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  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(--red); outline-offset: 4px; }
.page-shell { width: min(calc(100% - 48px), var(--shell)); margin: 0 auto; }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; margin: 0 0 14px; color: var(--kraft-deep); font-family: var(--mono); font-size: 11px; font-weight: 700; letter-spacing: 2.4px; line-height: 1.4; }
.eyebrow::before { width: 18px; height: 3px; content: ""; background: var(--red); }

/* header */
.site-header { position: sticky; top: 0; z-index: 60; border-bottom: 1px solid var(--line); background: rgba(251, 244, 230, .96); 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: 20px; }
.brand { display: inline-flex; align-items: center; flex: none; gap: 10px; font-size: 20px; font-weight: 900; letter-spacing: .3px; }
.brand img { width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 12px; object-fit: contain; background: #fff; }
.brand-tag { display: inline-flex; align-items: center; justify-content: center; width: 20px; height: 20px; border-radius: 6px; background: var(--red); color: #fff; font-size: 10px; font-style: normal; font-weight: 900; }
.primary-nav { margin-left: auto; }
.primary-nav ul { display: flex; align-items: center; gap: clamp(12px, 1.8vw, 24px); padding: 0; margin: 0; list-style: none; }
.primary-nav a { display: block; padding: 7px 0; border-bottom: 2px solid transparent; color: #6E5C49; font-size: 13px; font-weight: 700; }
.primary-nav a:hover { border-bottom-color: var(--kraft); 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 16px; border: 1px solid var(--kraft-deep); border-radius: 9px; background: var(--kraft); color: #fff; font-size: 13px; font-weight: 900; white-space: nowrap; transition: background .18s ease, color .18s ease; }
.nav-download:hover { background: var(--kraft-deep); }
.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: 10px; 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: copy left, kraft box panel right */
.hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--line); background:
  radial-gradient(520px 300px at 92% 0%, rgba(180, 118, 60, .18), transparent 70%),
  linear-gradient(180deg, #F8EEDC 0%, var(--paper) 78%); }
.hero::before { position: absolute; inset: auto 0 0; height: 120px; content: ""; background-image: repeating-linear-gradient(90deg, rgba(140, 85, 36, .07) 0 1px, transparent 1px 26px); 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, 4.4vw, 62px); padding: 56px 0 58px; }
.hero-copy { min-width: 0; }
.hero-kicker { display: inline-flex; align-items: center; gap: 10px; margin: 0 0 16px; color: var(--muted); font-family: var(--mono); font-size: 11px; letter-spacing: 1.4px; }
.hero-kicker b { padding: 3px 8px; border-radius: 5px; background: var(--red); color: #fff; font-size: 9.5px; font-weight: 900; letter-spacing: 1.2px; }
.hero h1 { margin: 0; font-size: clamp(52px, 7.6vw, 96px); font-weight: 900; letter-spacing: clamp(-1px, -.34vw, -3.4px); line-height: .96; }
.hero h1::after { display: block; width: 74px; height: 6px; margin-top: 16px; content: ""; background: var(--kraft); }
.hero-subtitle { margin: 18px 0 0; color: var(--kraft-deep); font-size: clamp(17px, 2vw, 23px); font-weight: 800; line-height: 1.45; }
.hero-lead { max-width: 500px; margin: 14px 0 0; color: var(--muted); font-size: 14.5px; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 18px; margin-top: 26px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; gap: 14px; padding: 0 26px; border: 1px solid transparent; border-radius: 10px; font-size: 14px; font-weight: 900; transition: transform .18s ease, background .18s ease; }
.button-primary { background: var(--kraft); color: #fff; box-shadow: 0 6px 0 #8C5524; }
.button-primary:hover { transform: translateY(-2px); background: var(--kraft-deep); box-shadow: 0 8px 0 #6E4119; }
.button-large { min-height: 56px; padding: 0 36px; font-size: 15px; }
.text-link { color: var(--kraft-deep); border-bottom: 1px dashed #C2A176; font-size: 13px; font-weight: 800; }
.text-link span { display: inline-block; margin-left: 5px; color: var(--red); }

.hero-stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; padding: 0; margin: 34px 0 0; border-top: 1px solid var(--line); list-style: none; }
.hero-stats li { padding: 16px 14px 0 0; min-width: 0; }
.hero-stats li + li { padding-left: 14px; border-left: 1px dashed var(--line); }
.hero-stats b { display: block; font-size: 14px; font-weight: 900; }
.hero-stats span { color: var(--muted); font-size: 11.5px; }

.box-panel { position: relative; min-width: 0; padding: 22px 22px 18px; border: 2px solid #C9A87A; border-radius: 18px 18px 22px 22px; background:
  linear-gradient(165deg, #FFF9EC, #F6E7CD 88%);
  box-shadow: 12px 14px 0 rgba(140, 85, 36, .16); }
.box-panel::before { position: absolute; top: -11px; left: 26px; right: 26px; height: 14px; content: ""; border: 2px solid #C9A87A; border-bottom: 0; border-radius: 8px 8px 0 0; background: #F9EEDB; }
.box-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin: 0 0 12px; font-size: 13px; font-weight: 900; }
.box-head b { color: var(--kraft-deep); font-family: var(--mono); font-size: 10px; font-weight: 700; }
.line-list { padding: 0; margin: 0; list-style: none; }
.line-list li { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 13px 14px; margin-bottom: 9px; border: 1px solid #DCC7A4; border-radius: 11px; background: #FFFDF8; min-width: 0; }
.line-list li > span { display: flex; flex-direction: column; min-width: 0; }
.line-list b { font-size: 14px; font-weight: 900; }
.line-list small { color: var(--muted); font-size: 11.5px; }
.line-list i { color: #A98B62; font-size: 18px; font-style: normal; }
.line-list li.is-picked { border-color: var(--kraft); background: #FBEAD3; box-shadow: inset 4px 0 0 var(--red); }
.line-list li.is-picked b { color: var(--kraft-deep); }
.line-list li.is-picked i { color: var(--red); font-weight: 900; }
.box-start { min-height: 46px; margin: 14px 0 0; border-radius: 23px; background: var(--red); color: #fff; font-size: 14px; font-weight: 900; line-height: 46px; text-align: center; letter-spacing: 2px; }
.box-foot { margin: 10px 0 0; color: #9C876C; font-size: 11.5px; text-align: center; }

/* features: 2 wide + 2 narrow */
.features { padding: 72px 0 76px; border-bottom: 1px solid var(--line); background: var(--paper-2); }
.section-heading { margin-bottom: 30px; }
.section-heading h2 { margin: 0; font-size: clamp(23px, 2.6vw, 33px); font-weight: 900; letter-spacing: -.5px; line-height: 1.35; }
.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(200px, 300px); align-items: end; gap: 24px; }
.section-heading-split > p:last-child { margin: 0 0 4px; }
.section-heading-center { text-align: center; }
.section-heading-center > p:last-child { margin-left: auto; margin-right: auto; }
.section-heading-center .eyebrow { justify-content: center; }
.feature-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.feature-card { position: relative; padding: 24px 24px 22px; border: 1px solid var(--line); border-radius: 12px; background: var(--card); min-width: 0; box-shadow: 6px 6px 0 rgba(180, 118, 60, .12); }
.feature-card.is-wide { background: linear-gradient(150deg, #FFF8EA, #F7E9D0); }
.feature-no { display: inline-block; margin-bottom: 10px; color: var(--kraft); font-family: var(--mono); font-size: 12px; font-weight: 700; letter-spacing: 2px; }
.feature-card h3 { margin: 0 0 8px; font-size: 18px; font-weight: 900; }
.feature-card p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }

/* shots: one big + three stacked */
.shots { padding: 72px 0 78px; }
.shot-layout { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: 16px; align-items: start; }
.shot-main, .shot-card { margin: 0; border: 1px solid var(--line); border-radius: 12px; background: var(--card); overflow: hidden; box-shadow: 8px 8px 0 rgba(180, 118, 60, .1); }
.shot-main img { width: 100%; height: auto; }
.shot-side { display: grid; gap: 14px; min-width: 0; }
.shot-card { display: grid; grid-template-columns: 118px minmax(0, 1fr); align-items: stretch; }
.shot-card img { width: 100%; height: 100%; min-height: 132px; object-fit: cover; object-position: center top; }
.shot-main figcaption, .shot-card figcaption { display: flex; align-items: baseline; gap: 8px; padding: 10px 14px; border-top: 1px solid var(--line); }
.shot-card figcaption { flex-direction: column; justify-content: center; border-top: 0; border-left: 1px solid var(--line); }
.shot-main figcaption b, .shot-card figcaption b { color: var(--red); font-family: var(--mono); font-size: 10px; }
.shot-main figcaption span, .shot-card figcaption span { display: flex; flex-direction: column; font-size: 13px; font-weight: 900; line-height: 1.45; min-width: 0; }
.shot-main figcaption small, .shot-card figcaption small { color: var(--muted); font-size: 11px; font-weight: 500; }

/* faq: 2 x 3 cards */
.faq { padding: 72px 0 78px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--paper-2); }
.faq-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px 14px; align-items: start; }
.faq-grid details { border: 1px solid var(--line); border-left: 4px solid var(--kraft); border-radius: 10px; background: var(--card); min-width: 0; }
.faq-grid summary { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 15px 16px; cursor: pointer; list-style: none; }
.faq-grid summary::-webkit-details-marker { display: none; }
.faq-grid summary h3 { margin: 0; font-size: 14.5px; font-weight: 900; line-height: 1.5; }
.faq-grid summary i { position: relative; flex: none; width: 20px; height: 20px; border: 1px solid var(--line); border-radius: 6px; }
.faq-grid summary i::before, .faq-grid summary i::after { position: absolute; top: 50%; left: 50%; width: 8px; height: 1.5px; content: ""; background: var(--red); transform: translate(-50%, -50%); }
.faq-grid summary i::after { transform: translate(-50%, -50%) rotate(90deg); transition: transform .2s ease; }
.faq-grid details[open] summary i::after { transform: translate(-50%, -50%) rotate(0); }
.faq-grid details p { padding: 0 16px 15px; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }

/* reviews: two columns, staggered */
.reviews { padding: 72px 0 78px; }
.review-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px 14px; padding: 0; margin: 0; list-style: none; }
.review-card { padding: 16px 18px; border: 1px solid var(--line); border-radius: 2px 14px 14px 14px; background: var(--card); min-width: 0; box-shadow: 4px 4px 0 rgba(180, 118, 60, .1); }
.review-card:nth-child(even) { margin-top: 22px; }
.review-meta { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; margin-bottom: 8px; }
.review-meta b { color: var(--kraft-deep); font-size: 13px; font-weight: 900; }
.review-meta time { color: #A08A70; font-family: var(--mono); font-size: 10px; }
.review-card p { margin: 0; color: #5F4E3C; font-size: 13px; line-height: 1.78; }

/* steps: three cards with dashed rail */
.steps { padding: 70px 0 76px; border-top: 1px solid var(--line); background: var(--paper-2); }
.step-list { position: relative; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; padding: 0; margin: 26px 0 0; list-style: none; }
.step-list::before { position: absolute; top: 34px; left: 8%; right: 8%; height: 0; border-top: 2px dashed #CFB694; content: ""; }
.step-list li { position: relative; z-index: 1; padding: 22px 20px 20px; border: 1px solid var(--line); border-radius: 12px; background: var(--card); text-align: center; min-width: 0; }
.step-list span { display: inline-flex; align-items: center; justify-content: center; width: 52px; height: 52px; margin: -48px auto 12px; border: 2px solid var(--kraft); border-radius: 50%; background: var(--paper); color: var(--kraft-deep); font-family: var(--mono); font-size: 17px; 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; }

/* download: kraft carton banner */
.download { padding: 26px 0; }
.download-inner { position: relative; display: flex; flex-direction: column; align-items: center; padding: 46px clamp(22px, 5vw, 56px) 40px; border: 2px solid #C9A87A; border-radius: 20px; background:
  repeating-linear-gradient(90deg, rgba(140, 85, 36, .05) 0 1px, transparent 1px 30px),
  linear-gradient(135deg, #F7E5C8, #EFD8B4 82%); text-align: center; box-shadow: 10px 12px 0 rgba(140, 85, 36, .14); }
.download-inner::before { position: absolute; top: 0; left: 50%; width: 78px; height: 8px; content: ""; background: var(--red); transform: translateX(-50%); border-radius: 0 0 6px 6px; }
.download h2 { max-width: 620px; margin: 0; font-size: clamp(23px, 2.6vw, 33px); font-weight: 900; letter-spacing: -.5px; line-height: 1.35; }
.download-inner > p { max-width: 520px; margin: 12px 0 22px; color: #6E5842; font-size: 14px; }
.download-notes { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 22px; padding: 18px 0 0; margin: 24px 0 0; border-top: 1px dashed #C2A176; list-style: none; }
.download-notes li { color: #7A5B38; font-family: var(--mono); font-size: 11px; }
.download-notes li::before { margin-right: 7px; content: "·"; color: var(--red); }

/* footer */
.site-footer { padding: 40px 0 48px; 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 22px; }
.footer-nav a { color: #6E5C49; font-size: 12px; }
.footer-nav a:hover { color: var(--red); }
.footer-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 20px; 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: #A08A70; font-size: 11.5px; line-height: 1.8; }

/* responsive */
@media (max-width: 1000px) {
  .hero-grid { gap: 26px; }
  .hero h1 { font-size: clamp(46px, 6.2vw, 68px); }
  .shot-side { gap: 12px; }
  .shot-card { grid-template-columns: 96px 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 24px 16px; border-bottom: 1px solid var(--line); background: var(--paper); box-shadow: 0 18px 28px rgba(60, 40, 20, .18); }
  .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: 40px 0 46px; }
  .hero-copy { order: 1; }
  .box-panel { order: 2; }
  .shot-layout { grid-template-columns: 1fr; }
  .shot-side { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .shot-card { display: flex; flex-direction: column; }
  .shot-card img { height: auto; min-height: 0; object-fit: contain; }
  .shot-card figcaption { border-left: 0; border-top: 1px solid var(--line); }
  .step-list { grid-template-columns: 1fr; gap: 26px; }
  .step-list::before { top: 10px; bottom: 10px; left: 34px; right: auto; width: 0; height: auto; border-top: 0; border-left: 2px dashed #CFB694; }
  .step-list li { text-align: left; padding-left: 78px; }
  .step-list span { position: absolute; top: 18px; left: 18px; margin: 0; }
}
@media (max-width: 768px) {
  .feature-grid { grid-template-columns: 1fr; }
  .faq-grid { grid-template-columns: 1fr; }
  .review-list { grid-template-columns: 1fr; }
  .review-card:nth-child(even) { margin-top: 0; }
  .section-heading-split { grid-template-columns: 1fr; gap: 10px; }
  .section-heading-split > p:last-child { margin: 0; }
  .hero-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero-stats li:nth-child(3) { padding-left: 0; border-left: 0; }
  .shot-side { grid-template-columns: 1fr; }
  .shot-card { display: grid; grid-template-columns: 120px minmax(0, 1fr); }
  .shot-card figcaption { border-left: 1px solid var(--line); border-top: 0; }
}
@media (max-width: 560px) {
  .page-shell, .nav-shell { width: calc(100% - 32px); }
  .hero h1 { font-size: clamp(40px, 12vw, 58px); }
  .hero-lead { font-size: 14px; }
  .brand { font-size: 16px; gap: 7px; }
  .brand img { width: 32px; height: 32px; }
  .brand-tag { display: none; }
  .nav-actions { gap: 8px; }
  .nav-download { min-height: 36px; padding: 0 10px; font-size: 11.5px; gap: 5px; }
  .nav-download svg { width: 14px; height: 14px; }
  .menu-toggle { width: 36px; height: 36px; }
  .box-panel { padding: 18px 16px 14px; }
  .hero-stats b { font-size: 13px; }
  .feature-card { padding: 20px 18px; }
  .shot-card { grid-template-columns: 96px minmax(0, 1fr); }
  .faq-grid summary h3 { font-size: 13.5px; }
  .download-inner { padding: 38px 20px 32px; }
  .button { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
}