/* ============================================================
   曜研 AURORA LAB · 轻奢科技风护肤官网
   黑金配色 / 实验室调性 / 现代科技
   ============================================================ */

:root {
  --bg: #0b0c0f;
  --bg-soft: #11141b;
  --bg-deep: #07080a;
  --panel: rgba(255, 255, 255, 0.045);
  --panel-strong: rgba(255, 255, 255, 0.07);
  --line: rgba(255, 255, 255, 0.12);
  --ink: #f3efe6;
  --ink-soft: rgba(243, 239, 230, 0.68);
  --ink-faint: rgba(243, 239, 230, 0.42);
  --gold: #c9a86a;
  --gold-bright: #ecd3a0;
  --danger: #e06a5d;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Noto Sans CJK SC", sans-serif;
  --font-serif: "Songti SC", "SimSun", "Noto Serif CJK SC", serif;
  --font-mono: "Cascadia Mono", Consolas, "Courier New", monospace;
  --container: 1200px;
  --header-h: 76px;
  --radius: 4px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

ul,
ol {
  list-style: none;
}

::selection {
  background: var(--gold);
  color: #111;
}

/* ---------- 通用 ---------- */
.container {
  width: min(var(--container), 100% - 48px);
  margin-inline: auto;
}

.section {
  padding-block: 96px;
}

.section--alt {
  background: var(--bg-soft);
  border-block: 1px solid var(--line);
}

.section-head {
  max-width: 700px;
  margin-bottom: 56px;
}

.section-head--center {
  margin-inline: auto;
  text-align: center;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 16px;
}

.section-eyebrow::before {
  content: "//";
  color: var(--gold);
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.06em;
}

.section-desc {
  margin-top: 16px;
  color: var(--ink-soft);
  font-size: 15px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 15px 32px;
  border-radius: 2px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.16em;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease),
    background 0.25s, color 0.25s, border-color 0.25s;
}

.btn--gold {
  background: linear-gradient(135deg, #d9b678, #b39051);
  color: #0d0e10;
  box-shadow: 0 10px 30px rgba(201, 168, 106, 0.28);
}

.btn--gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 38px rgba(201, 168, 106, 0.4);
}

.btn--ghost {
  border: 1px solid rgba(236, 211, 160, 0.45);
  color: var(--gold-bright);
  background: transparent;
}

.btn--ghost:hover {
  background: rgba(201, 168, 106, 0.1);
  transform: translateY(-2px);
}

.btn--sm {
  padding: 10px 22px;
  font-size: 12px;
}

/* ---------- 导航 ---------- */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(11, 12, 15, 0.82);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.header.is-scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
}

.header__inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-serif);
  font-size: 25px;
  font-weight: 700;
  letter-spacing: 0.24em;
  color: var(--ink);
}

.brand small {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.34em;
  color: var(--gold);
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav a {
  position: relative;
  padding: 10px 16px;
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  transition: color 0.25s;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 3px;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transition: transform 0.3s var(--ease);
}

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

.nav a:hover::after,
.nav a.is-active::after {
  transform: scaleX(1);
}

/* 桌面端隐藏导航内 CTA（右上角唯一） */
.nav .btn {
  display: none;
}

.header__actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 2px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.nav-toggle span {
  width: 20px;
  height: 1.5px;
  background: var(--ink);
  transition: transform 0.3s var(--ease), opacity 0.3s;
}

.nav-toggle.is-open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav-toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ---------- 页脚 ---------- */
.footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--line);
  padding-top: 72px;
  padding-bottom: 32px;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--line);
}

.footer__intro {
  margin-top: 16px;
  max-width: 300px;
  font-size: 14px;
  color: var(--ink-faint);
}

.footer__col-title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.28em;
  color: var(--gold);
  margin-bottom: 18px;
}

.footer__col li + li {
  margin-top: 10px;
}

.footer__col a {
  font-size: 14px;
  color: var(--ink-soft);
  transition: color 0.25s;
}

.footer__col a:hover {
  color: var(--gold-bright);
}

.footer__hotline {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 24px;
  letter-spacing: 0.08em;
  color: var(--ink);
}

.footer__hotline span {
  display: block;
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--ink-faint);
  margin-bottom: 4px;
}

.footer__socials {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}

.footer__socials a {
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 2px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.25s, background 0.25s;
}

.footer__socials a:hover {
  border-color: var(--gold);
  background: rgba(201, 168, 106, 0.1);
}

.footer__socials svg {
  width: 18px;
  height: 18px;
  fill: var(--ink-soft);
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding-top: 28px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
}

.footer__bottom a:hover {
  color: var(--gold);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background:
    radial-gradient(900px 520px at 78% 18%, rgba(201, 168, 106, 0.16), transparent 60%),
    radial-gradient(700px 500px at 10% 85%, rgba(255, 255, 255, 0.05), transparent 55%),
    linear-gradient(180deg, #0d0f13 0%, #0a0b0e 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(70% 70% at 50% 45%, #000 30%, transparent 75%);
  mask-image: radial-gradient(70% 70% at 50% 45%, #000 30%, transparent 75%);
}

.hero__inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 56px;
  padding-block: 130px 96px;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.32em;
  color: var(--gold);
  margin-bottom: 22px;
}

.hero__eyebrow::before {
  content: "◇";
  color: var(--gold);
}

.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(38px, 5.4vw, 62px);
  line-height: 1.28;
  letter-spacing: 0.08em;
  color: var(--ink);
}

.hero__title em {
  font-style: normal;
  background: linear-gradient(120deg, #f0d9a8, #c9a86a 55%, #e9d3a2);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__subtitle {
  margin-top: 22px;
  max-width: 470px;
  color: var(--ink-soft);
  font-size: 15px;
  letter-spacing: 0.04em;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 40px;
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: 52px;
  border: 1px solid var(--line);
  background: var(--line);
  max-width: 520px;
}

.hero__stat {
  background: rgba(13, 14, 17, 0.9);
  padding: 18px 16px;
}

.hero__stat strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 24px;
  color: var(--gold-bright);
}

.hero__stat strong i {
  font-style: normal;
  font-size: 13px;
}

.hero__stat span {
  font-size: 12px;
  color: var(--ink-faint);
  letter-spacing: 0.1em;
}

.hero__visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero__orbit {
  position: absolute;
  width: min(460px, 90%);
  aspect-ratio: 1;
  border: 1px solid rgba(201, 168, 106, 0.35);
  border-radius: 50%;
  animation: orbitSpin 30s linear infinite;
}

.hero__orbit::before,
.hero__orbit::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 18px rgba(201, 168, 106, 0.8);
}

.hero__orbit::before {
  width: 8px;
  height: 8px;
  top: 12%;
  left: 18%;
}

.hero__orbit::after {
  width: 5px;
  height: 5px;
  bottom: 20%;
  right: 12%;
  opacity: 0.6;
}

.hero__orbit--inner {
  width: min(360px, 72%);
  border-style: dashed;
  animation-direction: reverse;
  animation-duration: 46s;
}

.hero__bottle {
  position: relative;
  width: min(280px, 56vw);
  filter: drop-shadow(0 30px 50px rgba(0, 0, 0, 0.6));
  animation: heroFloat 7s ease-in-out infinite;
}

.hero__tag {
  position: absolute;
  z-index: 3;
  border: 1px solid var(--line);
  background: rgba(17, 20, 27, 0.78);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  padding: 12px 16px;
  border-radius: 2px;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
}

.hero__tag strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--gold-bright);
}

.hero__tag span {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
}

.hero__tag--left {
  left: -8px;
  bottom: 20%;
}

.hero__tag--right {
  right: -10px;
  top: 16%;
  animation-delay: 1.4s;
}

@keyframes heroFloat {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-14px);
  }
}

@keyframes orbitSpin {
  to {
    transform: rotate(360deg);
  }
}

/* ---------- 技术指标 ---------- */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.tech-card {
  position: relative;
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 40px 32px 36px;
  overflow: hidden;
  transition: border-color 0.3s, transform 0.35s var(--ease);
}

.tech-card::before {
  content: attr(data-index);
  position: absolute;
  right: 18px;
  top: 8px;
  font-family: var(--font-mono);
  font-size: 52px;
  color: rgba(255, 255, 255, 0.05);
}

.tech-card:hover {
  border-color: rgba(201, 168, 106, 0.5);
  transform: translateY(-6px);
}

.tech-card__num {
  font-family: var(--font-mono);
  font-size: 42px;
  line-height: 1.1;
  background: linear-gradient(120deg, #f0d9a8, #b39051);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.tech-card__num i {
  font-style: normal;
  font-size: 18px;
}

.tech-card h3 {
  font-size: 18px;
  letter-spacing: 0.1em;
  margin: 14px 0 8px;
}

.tech-card p {
  font-size: 13px;
  color: var(--ink-soft);
}

/* ---------- 产品 ---------- */
.product-card {
  position: relative;
  border: 1px solid var(--line);
  background: var(--panel);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.3s, transform 0.35s var(--ease);
}

.product-card:hover {
  border-color: rgba(201, 168, 106, 0.5);
  transform: translateY(-6px);
}

.product-card__visual {
  position: relative;
  aspect-ratio: 1 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(120% 90% at 50% 0%, rgba(201, 168, 106, 0.12), transparent 55%),
    var(--bg-soft);
}

.product-card__visual svg {
  width: 56%;
  filter: drop-shadow(0 18px 26px rgba(0, 0, 0, 0.55));
  transition: transform 0.4s var(--ease);
}

.product-card:hover .product-card__visual svg {
  transform: translateY(-8px) scale(1.03);
}

.product-card__code {
  position: absolute;
  top: 14px;
  left: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold);
  border: 1px solid rgba(201, 168, 106, 0.4);
  padding: 4px 10px;
  background: rgba(11, 12, 15, 0.72);
}

.product-card__body {
  padding: 24px 26px 26px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.product-card__cat {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.product-card__name {
  font-family: var(--font-serif);
  font-size: 20px;
  letter-spacing: 0.08em;
}

.product-card__desc {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.65;
}

.product-card__foot {
  margin-top: auto;
  padding-top: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.product-card__price {
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--gold-bright);
}

.product-card__price::before {
  content: "¥";
  font-size: 12px;
}

.product-card__more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gold);
  transition: gap 0.25s var(--ease);
}

.product-card__more:hover {
  gap: 10px;
}

.product-card__more svg {
  width: 13px;
  height: 13px;
  fill: currentColor;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.section-actions {
  margin-top: 48px;
  text-align: center;
}

/* ---------- 筛选 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 40px;
}

.filter-bar__label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
  margin-right: 6px;
}

.filter-btn {
  padding: 9px 22px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: transparent;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  transition: all 0.25s;
}

.filter-btn:hover {
  border-color: var(--gold);
  color: var(--gold-bright);
}

.filter-btn.is-active {
  background: var(--gold);
  border-color: var(--gold);
  color: #111;
}

.product-grid__empty {
  display: none;
  text-align: center;
  padding: 80px 20px;
  color: var(--ink-faint);
}

.product-grid__empty.is-visible {
  display: block;
}

/* ---------- 实验室数据 ---------- */
.lab-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.chart {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 34px 30px 26px;
}

.chart__title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--ink-faint);
  margin-bottom: 26px;
}

.chart__bars {
  display: flex;
  align-items: flex-end;
  gap: 20px;
  height: 220px;
}

.chart__bar {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  height: 100%;
  justify-content: flex-end;
}

.chart__bar i {
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--gold-bright);
}

.chart__bar span {
  width: 100%;
  max-width: 56px;
  background: linear-gradient(180deg, rgba(201, 168, 106, 0.9), rgba(201, 168, 106, 0.25));
  animation: barGrow 1s var(--ease) both;
}

.chart__bar em {
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
}

@keyframes barGrow {
  from {
    transform: scaleY(0);
  }
  to {
    transform: scaleY(1);
  }
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.data-table th,
.data-table td {
  text-align: left;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
}

.data-table th {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--gold);
  background: var(--panel);
}

.data-table td {
  color: var(--ink-soft);
}

.data-table td:first-child {
  color: var(--ink);
  font-weight: 600;
}

.data-table td strong {
  color: var(--gold-bright);
  font-family: var(--font-mono);
}

/* ---------- 资质 ---------- */
.badge-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.badge-cell {
  background: var(--bg);
  padding: 28px 22px;
  text-align: center;
}

.badge-cell strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 16px;
  letter-spacing: 0.12em;
  color: var(--ink);
}

.badge-cell span {
  font-size: 12px;
  color: var(--ink-faint);
}

/* ---------- 页面横幅 ---------- */
.page-hero {
  padding-top: calc(var(--header-h) + 76px);
  padding-bottom: 60px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(600px 280px at 88% 0%, rgba(201, 168, 106, 0.14), transparent 60%),
    var(--bg);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
  margin-bottom: 18px;
}

.breadcrumb a:hover {
  color: var(--gold);
}

.breadcrumb svg {
  width: 11px;
  height: 11px;
  fill: currentColor;
}

.page-hero__title {
  font-family: var(--font-serif);
  font-size: clamp(30px, 4vw, 44px);
  letter-spacing: 0.1em;
}

.page-hero__desc {
  margin-top: 14px;
  max-width: 560px;
  color: var(--ink-soft);
  font-size: 15px;
}

/* ---------- 故事页 ---------- */
.story-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.story-layout--reverse .story-layout__text {
  order: -1;
}

.story-layout__text p {
  margin-top: 18px;
  color: var(--ink-soft);
  font-size: 15px;
}

.story-layout__visual {
  min-height: 380px;
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(80% 70% at 50% 20%, rgba(201, 168, 106, 0.12), transparent 60%),
    var(--bg-soft);
  overflow: hidden;
}

.story-layout__visual svg {
  width: 58%;
  filter: drop-shadow(0 20px 34px rgba(0, 0, 0, 0.6));
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.stat-card {
  background: var(--bg);
  padding: 34px 22px;
  text-align: center;
}

.stat-card strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 36px;
  color: var(--gold-bright);
}

.stat-card strong i {
  font-style: normal;
  font-size: 16px;
}

.stat-card span {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--ink-faint);
}

.timeline {
  position: relative;
  max-width: 760px;
  margin-inline: auto;
  padding-left: 36px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(var(--gold), rgba(201, 168, 106, 0.15));
}

.timeline-item {
  position: relative;
  padding-bottom: 40px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 9px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--gold);
  box-shadow: 0 0 10px rgba(201, 168, 106, 0.6);
}

.timeline-item__year {
  font-family: var(--font-mono);
  font-size: 18px;
  letter-spacing: 0.12em;
  color: var(--gold);
  margin-bottom: 6px;
}

.timeline-item h3 {
  font-family: var(--font-serif);
  font-size: 20px;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.timeline-item p {
  font-size: 14px;
  color: var(--ink-soft);
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.value-card {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 36px 26px;
  transition: border-color 0.3s, transform 0.3s var(--ease);
}

.value-card:hover {
  border-color: rgba(201, 168, 106, 0.5);
  transform: translateY(-5px);
}

.value-card svg {
  width: 30px;
  height: 30px;
  fill: var(--gold);
  margin-bottom: 16px;
}

.value-card h3 {
  font-family: var(--font-serif);
  font-size: 19px;
  letter-spacing: 0.1em;
  margin-bottom: 10px;
}

.value-card p {
  font-size: 13px;
  color: var(--ink-soft);
}

/* ---------- 联系页 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  align-items: start;
}

.contact-info {
  display: grid;
  gap: 16px;
}

.contact-card {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 22px 24px;
  display: flex;
  gap: 18px;
  transition: border-color 0.3s;
}

.contact-card:hover {
  border-color: rgba(201, 168, 106, 0.45);
}

.contact-card__icon {
  flex-shrink: 0;
  width: 46px;
  height: 46px;
  border: 1px solid rgba(201, 168, 106, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-card__icon svg {
  width: 21px;
  height: 21px;
  fill: var(--gold);
}

.contact-card h3 {
  font-size: 15px;
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}

.contact-card p,
.contact-card a {
  font-size: 13px;
  color: var(--ink-soft);
}

.contact-card a:hover {
  color: var(--gold);
}

.contact-form-wrap {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 42px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 13px;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.form-group label em {
  font-style: normal;
  color: var(--danger);
}

.form-control {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: rgba(11, 12, 15, 0.7);
  padding: 13px 16px;
  outline: none;
  transition: border-color 0.25s, box-shadow 0.25s;
}

.form-control:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(201, 168, 106, 0.16);
}

textarea.form-control {
  resize: vertical;
  min-height: 130px;
}

.form-group.is-error .form-control {
  border-color: var(--danger);
}

.form-group.is-error .form-hint {
  display: block;
  color: var(--danger);
}

.form-hint {
  display: none;
  font-size: 12px;
  margin-top: 6px;
  color: var(--ink-faint);
}

.form-privacy {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
  color: var(--ink-faint);
  margin-bottom: 24px;
}

.form-privacy.is-error {
  color: var(--danger);
}

.form-privacy input {
  margin-top: 4px;
  accent-color: var(--gold);
}

.form-success {
  display: none;
  text-align: center;
  padding: 40px 10px;
}

.form-success.is-visible {
  display: block;
  animation: fadeIn 0.5s var(--ease) both;
}

.form-success svg {
  width: 54px;
  height: 54px;
  margin: 0 auto 18px;
  fill: var(--gold);
}

.form-success h3 {
  font-family: var(--font-serif);
  font-size: 24px;
  margin-bottom: 10px;
}

.form-success p {
  color: var(--ink-soft);
  font-size: 14px;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- FAQ ---------- */
.faq-list {
  max-width: 820px;
  margin-inline: auto;
  display: grid;
  gap: 14px;
}

.faq-item {
  border: 1px solid var(--line);
  background: var(--panel);
  transition: border-color 0.3s;
}

.faq-item.is-open {
  border-color: rgba(201, 168, 106, 0.5);
}

.faq-item__q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-align: left;
}

.faq-item__q svg {
  width: 16px;
  height: 16px;
  fill: var(--gold);
  flex-shrink: 0;
  transition: transform 0.3s var(--ease);
}

.faq-item.is-open .faq-item__q svg {
  transform: rotate(45deg);
}

.faq-item__a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease);
}

.faq-item__a p {
  padding: 0 24px 22px;
  font-size: 14px;
  color: var(--ink-soft);
}

/* ---------- 流程 ---------- */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.process-card {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 30px 24px;
}

.process-card__no {
  font-family: var(--font-mono);
  font-size: 36px;
  color: rgba(201, 168, 106, 0.4);
}

.process-card h3 {
  font-size: 16px;
  letter-spacing: 0.08em;
  margin: 12px 0 8px;
}

.process-card p {
  font-size: 13px;
  color: var(--ink-faint);
}

/* ---------- 返回顶部 ---------- */
.back-top {
  position: fixed;
  right: 26px;
  bottom: 26px;
  z-index: 90;
  width: 46px;
  height: 46px;
  border: 1px solid rgba(201, 168, 106, 0.5);
  background: rgba(17, 20, 27, 0.9);
  color: var(--gold);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.3s, transform 0.3s var(--ease), visibility 0.3s;
}

.back-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-top svg {
  width: 19px;
  height: 19px;
  fill: currentColor;
}

/* ---------- 显现动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 {
  transition-delay: 0.1s;
}

.reveal-delay-2 {
  transition-delay: 0.2s;
}

.reveal-delay-3 {
  transition-delay: 0.3s;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1100px) {
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero__inner {
    grid-template-columns: 1fr;
    gap: 44px;
    padding-block: 120px 80px;
    text-align: center;
  }

  .hero__subtitle {
    margin-inline: auto;
  }

  .hero__cta,
  .hero__stats {
    margin-inline: auto;
  }

  .hero__eyebrow {
    justify-content: center;
  }

  .hero__visual {
    order: -1;
  }

  .hero__bottle {
    width: min(220px, 50vw);
  }

  .tech-grid,
  .value-grid,
  .process-grid,
  .badge-strip {
    grid-template-columns: repeat(2, 1fr);
  }

  .lab-layout,
  .story-layout,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }

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

@media (max-width: 860px) {
  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    padding: 12px 20px 20px;
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, transform 0.3s var(--ease), visibility 0.3s;
  }

  .nav.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav a {
    padding: 14px 12px;
    border-bottom: 1px solid var(--line);
  }

  .nav a::after {
    display: none;
  }

  .nav .btn {
    display: inline-flex;
    margin-top: 14px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .header__actions .btn {
    display: none;
  }
}

@media (max-width: 640px) {
  .section {
    padding-block: 64px;
  }

  .container {
    width: calc(100% - 40px);
  }

  .product-grid,
  .tech-grid,
  .value-grid,
  .process-grid,
  .badge-strip {
    grid-template-columns: 1fr;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .contact-form-wrap {
    padding: 26px 20px;
  }

  .hero__stats {
    grid-template-columns: 1fr;
  }

  .hero__stat {
    padding: 14px;
  }

  .back-top {
    right: 16px;
    bottom: 16px;
  }
}