:root {
  --gold: #e8b14a;
  --gold-deep: #c99222;
  --orange: #f47920;
  --red: #c41e3a;
  --red-deep: #8b1428;
  --wood: #1a100c;
  --brown: #2c1810;
  --ink: #1c120c;
  --cream: #fbf4e6;
  --paper: #fffdf8;
  --muted: #6d5a48;
  --line: rgba(232, 177, 74, 0.35);
  --shadow: 0 18px 50px rgba(26, 16, 12, 0.18);
  --radius: 18px;
  --header-h: 72px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --serif: "Songti SC", "Noto Serif SC", "STSong", "SimSun", serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.7;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
}

h1,
h2,
h3,
h4 {
  font-family: var(--serif);
  line-height: 1.25;
  margin: 0 0 0.5em;
  font-weight: 700;
}

p {
  margin: 0 0 1em;
}

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.narrow {
  width: min(820px, calc(100% - 40px));
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -40px;
  background: var(--gold);
  color: var(--wood);
  padding: 8px 12px;
  z-index: 100;
}

.skip-link:focus {
  top: 12px;
}

.eyebrow {
  display: inline-block;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-size: 12px;
  color: var(--gold);
  margin-bottom: 10px;
}

.eyebrow.light {
  color: var(--gold);
}

.eyebrow.dark {
  color: var(--red);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-gold {
  background: linear-gradient(180deg, #f3c66a, var(--gold-deep));
  color: var(--wood);
}

.btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.45);
  color: #fff;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  isolation: isolate;
  height: var(--header-h);
  background: rgba(26, 16, 12, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(232, 177, 74, 0.18);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.logo-lockup,
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: #fff;
}

.header-inner .brand img {
  width: 44px;
  height: auto;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-text strong {
  font-family: var(--serif);
  font-size: 20px;
  letter-spacing: 0.12em;
}

.brand-text small {
  color: rgba(255, 255, 255, 0.65);
  font-size: 12px;
}

.site-nav {
  display: flex;
  gap: 22px;
}

.site-nav a {
  color: rgba(255, 255, 255, 0.82);
  text-decoration: none;
  font-size: 15px;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--gold);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 0;
  background: transparent;
  padding: 10px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: #fff;
  margin: 6px 0;
  transition: 0.2s ease;
}

.hero {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  background: var(--wood);
  color: #fff;
  overflow: hidden;
  display: grid;
  align-items: center;
}

.hero-media {
  position: absolute;
  inset: 0 0 0 38%;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 22%;
}

.hero-media-fade {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--wood) 0%, rgba(26, 16, 12, 0.55) 38%, rgba(26, 16, 12, 0.12) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 72px 0 88px;
  max-width: 640px;
  margin-left: max(20px, calc((100% - 1120px) / 2));
}

.hero h1 {
  font-size: clamp(36px, 6vw, 64px);
  margin: 0 0 18px;
}

.hero h1 sup {
  font-size: 0.4em;
  top: -0.8em;
}

.hero-lead {
  font-size: clamp(16px, 2vw, 18px);
  color: rgba(255, 255, 255, 0.86);
  max-width: 36em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 18px;
}

.hero-note {
  color: rgba(255, 255, 255, 0.55);
  font-size: 13px;
}

.company {
  background: var(--cream);
  padding: 88px 0;
}

.company-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: start;
}

.company-copy h2 {
  font-size: clamp(32px, 5vw, 48px);
  margin-bottom: 12px;
}

.company-name {
  font-family: var(--serif);
  font-size: clamp(20px, 3vw, 26px);
  color: var(--red-deep);
  font-weight: 700;
  margin-bottom: 16px;
}

.company-copy p {
  color: var(--muted);
  font-size: 17px;
}

.company-facts {
  margin: 0;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 8px 8px;
}

.company-facts > div {
  display: grid;
  gap: 4px;
  padding: 18px 22px;
  border-bottom: 1px solid #eadfce;
}

.company-facts > div:last-child {
  border-bottom: 0;
}

.company-facts dt {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gold-deep);
}

.company-facts dd {
  margin: 0;
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 700;
}

.company-facts a {
  color: var(--red-deep);
  text-decoration: none;
}

.brand-section {
  background: linear-gradient(180deg, #24150f 0%, #160e0a 100%);
  color: #fff;
  padding-top: 88px;
}

.brand-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  padding-bottom: 56px;
}

.brand-copy h2 {
  font-size: clamp(32px, 5vw, 48px);
  margin-bottom: 18px;
}

.brand-copy p {
  color: rgba(255, 255, 255, 0.84);
  font-size: 17px;
}

.brand-visual {
  position: relative;
  min-height: 380px;
}

.brand-visual img {
  width: min(280px, 70%);
  margin: 0 auto;
  filter: drop-shadow(0 20px 30px rgba(0, 0, 0, 0.45));
}

.brand-visual .pack-small {
  position: absolute;
  right: 8%;
  bottom: -8%;
  width: min(170px, 42%);
}

.feature-bar {
  background: var(--gold);
  color: var(--wood);
}

.feature-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  padding: 22px 0;
}

.feature-row article {
  display: grid;
  grid-template-columns: 48px 1fr;
  grid-template-rows: auto auto;
  column-gap: 12px;
  align-items: center;
}

.feature-row svg {
  width: 42px;
  height: 42px;
  grid-row: 1 / span 2;
}

.feature-row h3 {
  margin: 0;
  font-size: 18px;
  font-family: var(--serif);
}

.feature-row p {
  margin: 0;
  font-size: 13px;
  opacity: 0.8;
}

.history-sky {
  background:
    radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.35), transparent 28%),
    linear-gradient(180deg, #f3e2c4 0%, #e8c896 55%, #d9a45a 100%);
  padding-top: 72px;
  position: relative;
}

.history-sky h2 {
  font-size: clamp(32px, 5vw, 48px);
  color: var(--red-deep);
}

.mountain {
  position: relative;
  margin-top: 12px;
  height: 280px;
}

.mountain svg {
  width: 100%;
  height: 100%;
  display: block;
}

.ridge {
  fill: #d8b07a;
}

.ridge.r2 {
  fill: #c9965c;
}

.ridge.r3 {
  fill: #b67a3c;
}

.trail {
  fill: none;
  stroke: var(--red);
  stroke-width: 3;
  stroke-linecap: round;
}

.milestones {
  position: absolute;
  inset: 0 4% 38px;
}

.dot {
  position: absolute;
  top: 18%;
  transform: translateX(-50%);
  border: 0;
  background: transparent;
  color: var(--red-deep);
  cursor: pointer;
  padding: 0;
  font-family: inherit;
}

.dot::before {
  content: "";
  display: block;
  width: 14px;
  height: 14px;
  margin: 0 auto 8px;
  border-radius: 50%;
  background: var(--red);
  box-shadow: 0 0 0 5px rgba(196, 30, 58, 0.18);
}

.dot span {
  font-weight: 700;
  font-size: 14px;
  white-space: nowrap;
}

.dot.is-active::before {
  box-shadow: 0 0 0 7px rgba(196, 30, 58, 0.28);
  transform: scale(1.15);
}

.history-panel {
  background: #f09819;
  color: var(--wood);
  padding: 36px 0 48px;
  min-height: 180px;
}

.history-year {
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}

.history-panel h3 {
  font-size: clamp(22px, 3vw, 30px);
}

.product {
  padding: 88px 0;
  background: var(--cream);
}

.section-head {
  text-align: center;
  margin-bottom: 40px;
}

.section-head h2 {
  font-size: clamp(32px, 5vw, 48px);
}

.section-lead {
  color: var(--muted);
  max-width: 40em;
  margin: 0 auto;
}

.section-lead.tight {
  margin-bottom: 28px;
}

.subhead {
  font-size: 26px;
  margin: 56px 0 20px;
  text-align: center;
}

.pack-row {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}

.pack-row figure {
  margin: 0;
  text-align: center;
}

.pack-row img {
  width: 220px;
  margin: 0 auto 12px;
  filter: drop-shadow(0 16px 24px rgba(26, 16, 12, 0.16));
}

.pack-row figcaption {
  color: var(--muted);
}

.symptom-grid {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.symptom-grid li {
  background: #fff;
  border: 1px solid rgba(196, 30, 58, 0.12);
  border-radius: 999px;
  text-align: center;
  padding: 14px 10px;
  font-weight: 600;
}

.usage-block {
  margin-top: 48px;
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 36px;
  align-items: center;
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.usage-block img {
  height: 100%;
  object-fit: cover;
  min-height: 280px;
}

.usage-block > div {
  padding: 32px 32px 32px 8px;
}

.usage-list {
  padding-left: 1.1em;
}

.warn {
  background: #fff4e5;
  border-left: 4px solid var(--orange);
  padding: 12px 14px;
  font-size: 14px;
  color: #6a3e12;
}

.scene-grid,
.ing-grid {
  display: grid;
  gap: 20px;
}

.scene-grid {
  grid-template-columns: repeat(3, 1fr);
}

.scene-grid article,
.ing-grid article {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.scene-grid img,
.ing-grid img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.scene-grid div,
.ing-grid h4,
.ing-grid p {
  padding-left: 18px;
  padding-right: 18px;
}

.scene-grid h4,
.ing-grid h4 {
  margin: 16px 0 8px;
}

.scene-grid p,
.ing-grid p {
  padding-bottom: 18px;
  color: var(--muted);
  font-size: 14px;
}

.ing-grid {
  grid-template-columns: repeat(3, 1fr);
}

.ing-grid img {
  height: 160px;
  background: #111;
}

.faq {
  padding: 80px 0;
  background: #fff;
}

.accordion details {
  border-bottom: 1px solid #eadfce;
  padding: 8px 0;
}

.accordion summary {
  cursor: pointer;
  font-weight: 700;
  font-size: 17px;
  list-style: none;
  padding: 12px 0;
}

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

.accordion summary::after {
  content: "+";
  float: right;
  color: var(--red);
  font-weight: 400;
}

.accordion details[open] summary::after {
  content: "–";
}

.accordion p {
  color: var(--muted);
  padding-bottom: 12px;
}

.contact {
  padding: 0 0 80px;
  background: var(--cream);
}

.contact-card {
  background: var(--wood);
  color: #fff;
  border-radius: 28px;
  padding: 56px 40px;
  text-align: center;
  background-image:
    radial-gradient(circle at 15% 20%, rgba(232, 177, 74, 0.18), transparent 28%),
    radial-gradient(circle at 85% 80%, rgba(196, 30, 58, 0.22), transparent 30%);
}

.contact-card h2 {
  font-size: clamp(28px, 4vw, 42px);
}

.mail {
  display: inline-block;
  margin-top: 12px;
  color: var(--gold);
  font-size: clamp(22px, 4vw, 32px);
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0.02em;
  border-bottom: 1px solid currentColor;
}

.site-footer {
  background: #120c09;
  color: rgba(255, 255, 255, 0.72);
  padding: 40px 0 24px;
  font-size: 13px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-grid img {
  margin-bottom: 10px;
}

.copy {
  text-align: center;
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.4);
}

@media (max-width: 900px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: #160e0a;
    flex-direction: column;
    padding: 16px 22px 24px;
    gap: 16px;
    border-bottom: 1px solid rgba(232, 177, 74, 0.18);
  }

  .site-nav.is-open {
    display: flex;
  }

  .hero-media {
    inset: auto 0 0 0;
    height: 46%;
  }

  .hero-media-fade {
    background: linear-gradient(180deg, var(--wood) 0%, rgba(26, 16, 12, 0.15) 40%, rgba(26, 16, 12, 0.35) 100%);
  }

  .hero {
    min-height: 92vh;
    align-items: start;
  }

  .hero-content {
    margin: 0 auto;
    padding-top: 40px;
    padding-bottom: 52%;
    width: min(1120px, calc(100% - 40px));
  }

  .company-grid,
  .brand-grid,
  .usage-block,
  .scene-grid,
  .ing-grid,
  .footer-grid,
  .feature-row,
  .symptom-grid {
    grid-template-columns: 1fr;
  }

  .brand-visual {
    min-height: 300px;
    display: flex;
    justify-content: center;
  }

  .brand-visual .pack-small {
    position: static;
    width: 140px;
    margin-top: 12px;
  }

  .usage-block > div {
    padding: 24px;
  }

  .mountain {
    height: 220px;
  }

  .dot span {
    font-size: 12px;
  }

  .symptom-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  .hero h1 {
    font-size: 34px;
  }

  .pack-row img {
    width: 160px;
  }

  .contact-card {
    padding: 40px 20px;
  }

  .feature-row article {
    grid-template-columns: 40px 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .btn:hover {
    transform: none;
  }
}