:root {
  --brown: #6B3B1F;
  --brown-deep: #4A2712;
  --orange: #FF8A3D;
  --paper: #F5F2ED;
  --paper-2: #EBE5D9;
  --card: #FFFCF6;
  --ink: #3A2415;
  --soft: #7A6150;
  --line: rgba(107, 59, 31, 0.18);
  --shell: 1140px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(520px 300px at 92% -4%, rgba(255, 138, 61, 0.16), transparent 62%),
    var(--paper);
  color: var(--ink);
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img { display: block; max-width: 100%; height: auto; }
h1, h2, h3 { margin: 0; line-height: 1.3; font-weight: 700; }

.page-shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(255, 252, 246, 0.95);
  border-bottom: 3px solid var(--brown);
  backdrop-filter: blur(10px);
}

.nav-shell {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 11px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 800;
  white-space: nowrap;
  color: var(--brown);
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  object-fit: cover;
  border: 1px solid var(--line);
  background: var(--paper-2);
}

.primary-nav { margin-left: auto; }

.primary-nav ul {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 14.5px;
  color: var(--soft);
}

.primary-nav a {
  display: inline-block;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}

.primary-nav a:hover { color: var(--brown); border-bottom-color: var(--orange); }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 8px;
  background: var(--brown);
  color: var(--card);
  font-size: 14.5px;
  font-weight: 800;
  transition: background 0.18s ease;
}

.nav-download svg {
  width: 17px;
  height: 17px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.nav-download:hover { background: var(--brown-deep); }

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1.5px solid var(--brown);
  border-radius: 8px;
  background: var(--card);
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 16px;
  height: 2px;
  margin: 3px auto;
  background: var(--brown);
}

/* ---------- hero ---------- */
.hero {
  padding: 56px 0 50px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  gap: 46px;
  align-items: center;
}

.hero-kicker {
  display: inline-block;
  padding: 3px 10px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--brown);
  background: rgba(255, 138, 61, 0.18);
  border-radius: 4px;
}

.hero h1 {
  margin: 16px 0 12px;
  font-size: clamp(34px, 4.7vw, 55px);
  letter-spacing: 0.01em;
  color: var(--brown-deep);
}

.hero h1::first-letter { color: var(--orange); }

.hero-subtitle {
  display: inline-block;
  font-size: clamp(17px, 1.9vw, 21px);
  font-weight: 700;
  color: var(--brown);
  border-bottom: 3px solid var(--orange);
  padding-bottom: 2px;
}

.hero-lead {
  margin-top: 16px;
  max-width: 480px;
  font-size: 15.5px;
  color: var(--soft);
}

.hero-actions {
  margin-top: 26px;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 24px;
  border-radius: 8px;
  font-weight: 800;
  font-size: 15.5px;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.button svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.button-primary {
  background: var(--orange);
  color: #401F08;
  box-shadow: 0 12px 24px rgba(255, 138, 61, 0.28);
}

.button-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 30px rgba(255, 138, 61, 0.34);
}

.button-large { padding: 15px 30px; font-size: 16.5px; }

.text-link {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--brown);
  border-bottom: 1px dashed rgba(107, 59, 31, 0.5);
  padding-bottom: 2px;
}

.text-link:hover { color: var(--orange); }

.hero-tags {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 12.5px;
  color: var(--soft);
}

.hero-tags li {
  padding: 3px 11px;
  border-radius: 4px;
  background: var(--card);
  border: 1px solid var(--line);
}

.hero-tags b { color: var(--brown); }

/* ---------- hero gear panel ---------- */
.gear-panel {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 18px;
  padding: 22px 20px;
  border-radius: 16px;
  background: var(--card);
  border: 2px dashed rgba(107, 59, 31, 0.32);
  box-shadow: 0 20px 40px rgba(74, 39, 18, 0.1);
  overflow: hidden;
}

.gear {
  position: relative;
  width: clamp(54px, 8vw, 88px);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: repeating-conic-gradient(var(--brown) 0 10deg, transparent 10deg 20deg);
  animation: gear-spin 22s linear infinite;
}

.gear::before {
  content: "";
  position: absolute;
  inset: 12%;
  border-radius: 50%;
  background: var(--card);
  border: 5px solid var(--brown);
}

.gear::after {
  content: "";
  position: absolute;
  inset: 41%;
  border-radius: 50%;
  background: var(--orange);
}

.gear-sm {
  background: repeating-conic-gradient(var(--orange) 0 12deg, transparent 12deg 24deg);
  animation-direction: reverse;
  animation-duration: 28s;
}

.gear-sm::before { border-color: var(--orange); }
.gear-sm::after { background: var(--brown); }

@keyframes gear-spin {
  to { transform: rotate(360deg); }
}

@media (prefers-reduced-motion: reduce) {
  .gear { animation: none; }
}

.gear-readout { min-width: 0; }

.readout-title {
  font-size: 11.5px;
  font-weight: 800;
  letter-spacing: 0.18em;
  color: var(--brown);
  padding-bottom: 8px;
  margin-bottom: 8px;
  border-bottom: 1px dashed var(--line);
}

.gear-readout ul { display: grid; gap: 7px; }

.gear-readout li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  font-size: 12.5px;
  color: var(--soft);
}

.gear-readout li b {
  font-family: "Consolas", "Menlo", monospace;
  font-size: 13px;
  color: var(--brown-deep);
  white-space: nowrap;
}

/* ---------- section shared ---------- */
section { padding: 56px 0; }

.section-heading {
  max-width: 660px;
  margin-bottom: 28px;
}

.section-heading .eyebrow {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--brown);
  background: rgba(255, 138, 61, 0.22);
  border-radius: 3px;
  padding: 2px 9px;
  margin-bottom: 10px;
}

.section-heading h2 {
  font-size: clamp(23px, 2.8vw, 32px);
  color: var(--brown-deep);
}

.section-heading p:last-child {
  margin-top: 10px;
  font-size: 14.5px;
  color: var(--soft);
}

.section-heading-split {
  max-width: none;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
}

.section-heading-split > p {
  margin: 0 0 6px;
  font-size: 13.5px;
  color: var(--soft);
  white-space: nowrap;
}

/* ---------- features ---------- */
.features {
  background: var(--paper-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.gear-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.gear-grid article {
  position: relative;
  padding: 20px 18px 22px;
  border-radius: 10px;
  background: var(--card);
  border: 1px solid var(--line);
  box-shadow: 0 10px 22px rgba(74, 39, 18, 0.06);
}

.gear-grid article::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 26px;
  height: 26px;
  background: linear-gradient(225deg, rgba(255, 138, 61, 0.5) 0 50%, transparent 50%);
  border-radius: 0 10px 0 0;
}

.gear-grid span {
  display: inline-block;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--card);
  background: var(--brown);
  border-radius: 3px;
  padding: 1px 9px;
  margin-bottom: 10px;
}

.gear-grid h3 {
  font-size: 17px;
  margin-bottom: 7px;
  color: var(--brown-deep);
}

.gear-grid p {
  font-size: 13.6px;
  color: var(--soft);
  line-height: 1.75;
}

/* ---------- shots ---------- */
.gear-shots {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 15px;
}

.gear-shots figure {
  margin: 0;
  padding: 8px 8px 0;
  border-radius: 10px;
  background: var(--card);
  border: 1px solid var(--line);
  border-top: 4px solid var(--brown);
}

.gear-shots img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  object-position: top center;
  border-radius: 4px;
  background: var(--paper-2);
}

.gear-shots figcaption {
  display: flex;
  align-items: baseline;
  gap: 7px;
  padding: 10px 2px 12px;
  font-size: 13px;
  font-weight: 700;
  color: var(--brown-deep);
}

.gear-shots figcaption b {
  font-family: "Consolas", "Menlo", monospace;
  font-size: 11px;
  color: var(--orange);
}

.gear-shots figcaption small {
  margin-left: auto;
  font-weight: 400;
  font-size: 11px;
  color: var(--soft);
}

.sample-note {
  margin-top: 16px;
  font-size: 12.5px;
  color: var(--soft);
}

/* ---------- faq ---------- */
.faq { background: #EFE9DE; }

.faq-rows {
  display: grid;
  gap: 9px;
  max-width: 900px;
}

.faq-rows details {
  padding: 0 18px;
  border-radius: 10px;
  background: var(--card);
  border: 1px solid var(--line);
}

.faq-rows details[open] { border-color: rgba(255, 138, 61, 0.6); }

.faq-rows summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 0;
  cursor: pointer;
  list-style: none;
}

.faq-rows summary::-webkit-details-marker { display: none; }

.faq-rows summary h3 {
  flex: 1;
  font-size: 15.5px;
  color: var(--brown-deep);
}

.faq-rows summary i {
  position: relative;
  flex: none;
  width: 20px;
  height: 20px;
  border-radius: 6px;
  background: rgba(255, 138, 61, 0.24);
}

.faq-rows summary i::before,
.faq-rows summary i::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--brown);
  transform: translate(-50%, -50%);
}

.faq-rows summary i::before { width: 9px; height: 2px; }
.faq-rows summary i::after { width: 2px; height: 9px; transition: opacity 0.2s ease; }
.faq-rows details[open] summary i::after { opacity: 0; }

.faq-rows details > p {
  padding: 12px 0 15px;
  border-top: 1px dashed var(--line);
  font-size: 14px;
  color: var(--soft);
}

/* ---------- reviews ---------- */
.note-wall {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.review-card {
  padding: 18px;
  border-radius: 10px;
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 4px solid var(--orange);
}

.review-card > p {
  font-size: 13.8px;
  color: #52372A;
}

.review-meta {
  margin-top: 12px;
  padding-top: 10px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  border-top: 1px dashed var(--line);
  font-size: 11px;
  color: #8B7360;
}

.review-meta b {
  font-size: 12px;
  color: var(--brown);
}

/* ---------- steps ---------- */
.steps { background: var(--paper-2); }

.pick-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.pick-row li {
  position: relative;
  padding: 22px 20px 24px;
  border-radius: 10px;
  background: var(--card);
  border: 1px solid var(--line);
}

.pick-row span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 54px;
  height: 22px;
  padding: 0 8px;
  border-radius: 999px;
  font-size: 10.5px;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--card);
  background: var(--brown);
  margin-bottom: 10px;
}

.pick-row h3 {
  font-size: 18px;
  margin-bottom: 6px;
  color: var(--brown-deep);
}

.pick-row p {
  font-size: 13.6px;
  color: var(--soft);
  line-height: 1.75;
}

/* ---------- download ---------- */
.download { padding-bottom: 66px; }

.download-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 34px;
  padding: 34px;
  border-radius: 16px;
  background:
    radial-gradient(340px 200px at 88% 0%, rgba(255, 138, 61, 0.3), transparent 64%),
    linear-gradient(118deg, #7A4423, var(--brown-deep));
  color: var(--card);
  box-shadow: 0 22px 44px rgba(74, 39, 18, 0.22);
}

.download-copy { max-width: 520px; }

.download-copy .eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--orange);
  margin-bottom: 8px;
}

.download-copy h2 {
  font-size: clamp(23px, 2.7vw, 31px);
  margin-bottom: 8px;
  color: var(--card);
}

.download-copy p { font-size: 14.5px; color: #E8D9C9; }

.download-act {
  flex: none;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.download-notes {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  font-size: 12px;
  color: #E8D9C9;
}

.download-notes li::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 4px;
  margin-right: 6px;
  border-radius: 50%;
  background: var(--orange);
  vertical-align: 2px;
}

/* ---------- footer ---------- */
.site-footer {
  background: var(--brown-deep);
  color: var(--card);
  padding: 36px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr) minmax(0, 0.85fr);
  gap: 22px 30px;
  align-items: start;
}

.footer-brand strong {
  display: block;
  font-size: 17px;
  color: var(--orange);
}

.footer-brand p {
  margin-top: 4px;
  font-size: 12.5px;
  color: #DCC9B6;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font-size: 13px;
  color: #DCC9B6;
}

.footer-nav a:hover { color: var(--orange); }

.footer-meta {
  font-size: 12.5px;
  color: #DCC9B6;
  text-align: right;
}

.footer-meta a:hover { color: var(--orange); }

.disclaimer {
  grid-column: 1 / -1;
  padding-top: 16px;
  border-top: 1px solid rgba(245, 242, 237, 0.18);
  font-size: 12px;
  line-height: 1.72;
  color: #B99C84;
}

/* ---------- responsive ---------- */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr); gap: 30px; }
  .gear-panel { max-width: 520px; }
  .gear-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .gear-shots { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .note-wall { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-meta { text-align: left; }
  .download-panel { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 900px) {
  .primary-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    margin-left: 0;
    display: none;
    padding: 10px 24px 16px;
    background: var(--card);
    border-bottom: 2px solid var(--brown);
  }

  .primary-nav.is-open { display: block; }

  .primary-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    font-size: 15px;
  }

  .primary-nav li { width: 100%; }

  .primary-nav a {
    display: block;
    padding: 11px 0;
    border-bottom: 1px solid var(--line);
  }

  .nav-shell { position: relative; flex-wrap: wrap; }
  .primary-nav { order: 4; flex-basis: 100%; }
  .nav-actions { margin-left: auto; }
  .menu-toggle { display: block; }
  .nav-download span { display: none; }
  .nav-download { padding: 10px 12px; }
}

@media (max-width: 640px) {
  .page-shell, .nav-shell { padding-left: 18px; padding-right: 18px; }
  section { padding: 44px 0; }
  .hero { padding: 40px 0 36px; }
  .gear-grid { grid-template-columns: minmax(0, 1fr); }
  .note-wall { grid-template-columns: minmax(0, 1fr); }
  .pick-row { grid-template-columns: minmax(0, 1fr); }
  .section-heading-split { flex-direction: column; align-items: flex-start; gap: 6px; }
  .section-heading-split > p { white-space: normal; }
  .download-panel { padding: 26px 20px; }
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .download-act { width: 100%; }
  .download-act .button { width: 100%; justify-content: center; }
}

@media (max-width: 400px) {
  .gear-shots { grid-template-columns: minmax(0, 1fr); }
  .brand span { font-size: 15px; }
  .gear-panel { gap: 10px; padding: 16px 12px; }
  .gear-readout li { font-size: 11.5px; }
  .gear-readout li b { font-size: 12px; }
  .download-panel { padding: 22px 16px; }
}