/* ═══════════════════════════════════════════════════════════════
   FOMOMY 芙欧蜜 · 品牌主页样式
   纯手写 CSS，无第三方依赖、无外部字体请求
   配色源自品牌字标 coral #E8644E
   ═══════════════════════════════════════════════════════════════ */

/* ── 设计变量 ─────────────────────────────────────────────── */
:root {
  --cream:      #FFF9F7;
  --cream-2:    #FDF3EF;
  --coral:      #E8644E;
  --coral-deep: #C94A36;
  --coral-soft: #F2D9D2;
  --coral-wash: #FDF0EC;
  --ink:        #2B2320;
  --ink-2:      #6B5E58;
  --ink-3:      #9A8C84;
  --line:       #EFE3DE;

  --serif: 'Songti SC', 'STSong', 'Source Han Serif SC', 'Noto Serif SC', 'SimSun', serif;
  --sans:  'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
  --latin: 'Poppins', 'Montserrat', 'Helvetica Neue', Arial, sans-serif;

  --wrap: 1120px;
  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 18px 48px -28px rgba(43, 35, 32, 0.28);
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── 基础重置 ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;      /* 避开吸顶页头 */
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
h1, h2, h3 { margin: 0; line-height: 1.2; font-weight: 600; }
p { margin: 0 0 1.1em; }
a { color: inherit; text-decoration: none; }
ul, ol, dl, dd { margin: 0; padding: 0; }
li { list-style: none; }

.latin { font-family: var(--latin); }

:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 999;
  background: var(--coral);
  color: #fff;
  padding: 12px 20px;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus { left: 0; }

/* ── 布局容器 ─────────────────────────────────────────────── */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 104px 0; }
.section-alt { background: var(--cream-2); }

.section-head { margin-bottom: 56px; max-width: 720px; }

.eyebrow {
  font-family: var(--latin);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--coral);
  margin: 0 0 14px;
}

.section-title {
  font-family: var(--serif);
  font-size: clamp(28px, 4vw, 42px);
  letter-spacing: 0.04em;
  font-weight: 600;
}

.section-title .latin { font-family: var(--latin); letter-spacing: 0.06em; }

.section-sub {
  margin: 18px 0 0;
  color: var(--ink-2);
  font-size: 16.5px;
  max-width: 56ch;
}

.lede { font-size: 19px; color: var(--ink); }

.footnote {
  margin: 40px 0 0;
  font-size: 13.5px;
  color: var(--ink-3);
  padding-left: 16px;
  border-left: 2px solid var(--coral-soft);
}

/* 待补充占位：显式暴露未完成项，不伪装成正文 */
.todo {
  color: var(--coral-deep);
  border-bottom: 1px dashed var(--coral);
  cursor: help;
  font-size: 0.92em;
}
.todo-invert { color: #FFB9A8; border-bottom-color: #FFB9A8; }

/* ── 页头 ─────────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 249, 247, 0.86);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}
.site-header.is-stuck {
  border-bottom-color: var(--line);
  background: rgba(255, 249, 247, 0.95);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
}

.brand { display: block; flex: 0 0 auto; }
.brand-logo {
  width: 148px;
  height: auto;
  color: var(--coral);
}

.nav {
  display: flex;
  align-items: center;
  gap: 34px;
}
.nav a {
  font-size: 15px;
  color: var(--ink-2);
  position: relative;
  padding: 6px 0;
  transition: color 0.22s var(--ease);
}
.nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1.5px;
  background: var(--coral);
  transition: width 0.28s var(--ease);
}
.nav a:hover { color: var(--ink); }
.nav a:hover::after { width: 100%; }

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 11px 9px;
  background: none;
  border: 0;
  cursor: pointer;
  flex-direction: column;
  justify-content: space-between;
}
.nav-toggle span {
  display: block;
  height: 1.6px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.2s var(--ease);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(10.4px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-10.4px) rotate(-45deg); }

/* ── 按钮 ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 30px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: transform 0.22s var(--ease), box-shadow 0.22s var(--ease),
              background 0.22s var(--ease), color 0.22s var(--ease);
}
.btn-primary {
  background: var(--coral);
  color: #fff;
  box-shadow: 0 12px 30px -12px rgba(232, 100, 78, 0.7);
}
.btn-primary:hover {
  background: var(--coral-deep);
  transform: translateY(-2px);
  box-shadow: 0 18px 38px -14px rgba(232, 100, 78, 0.75);
}
.btn-ghost {
  border: 1px solid var(--line);
  color: var(--ink);
  background: transparent;
}
.btn-ghost:hover {
  border-color: var(--coral);
  color: var(--coral);
  transform: translateY(-2px);
}

/* ── 首屏 ─────────────────────────────────────────────────── */
.hero {
  position: relative;
  padding: 88px 0 96px;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -18%;
  right: -12%;
  width: 62vw;
  height: 62vw;
  max-width: 760px;
  max-height: 760px;
  background: radial-gradient(circle at 50% 50%,
              rgba(232, 100, 78, 0.13) 0%,
              rgba(232, 100, 78, 0.05) 42%,
              rgba(232, 100, 78, 0) 70%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 48px;
}

.hero-title {
  font-family: var(--serif);
  font-size: clamp(44px, 7.4vw, 82px);
  line-height: 1.1;
  letter-spacing: 0.03em;
  margin: 0 0 26px;
  font-weight: 600;
}
.hero-title em {
  font-style: normal;
  color: var(--coral);
  position: relative;
}
.hero-title em::after {
  content: '';
  position: absolute;
  left: 2%;
  bottom: 0.06em;
  width: 96%;
  height: 0.14em;
  background: var(--coral-soft);
  border-radius: 999px;
  z-index: -1;
}

.hero-lede {
  font-size: 18px;
  color: var(--ink-2);
  max-width: 30em;
  margin-bottom: 36px;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }

/* 装饰镜片簇 */
.hero-art { position: relative; }
.lens-stage {
  position: relative;
  aspect-ratio: 1 / 1;
  max-width: 460px;
  margin: 0 auto;
}
.lens { border-radius: 50%; }
.lens-lg {
  position: absolute;
  right: 2%;
  top: 8%;
  width: 74%;
  filter: drop-shadow(0 30px 50px rgba(43, 35, 32, 0.22));
  animation: floatSlow 9s ease-in-out infinite;
}
.lens-md {
  position: absolute;
  left: 0;
  bottom: 12%;
  width: 42%;
  filter: drop-shadow(0 18px 34px rgba(43, 35, 32, 0.2));
  animation: floatSlow 11s ease-in-out infinite reverse;
}
.lens-sm {
  position: absolute;
  left: 24%;
  top: 2%;
  width: 28%;
  filter: drop-shadow(0 14px 26px rgba(43, 35, 32, 0.18));
  animation: floatSlow 13s ease-in-out infinite;
}
.lens-halo {
  position: absolute;
  inset: 6%;
  border: 1px solid var(--coral-soft);
  border-radius: 50%;
  opacity: 0.75;
}

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

.art-note {
  text-align: center;
  font-size: 12.5px;
  color: var(--ink-3);
  letter-spacing: 0.08em;
  margin: 18px 0 0;
}

/* ── 品牌 ─────────────────────────────────────────────────── */
.brand-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 64px;
  align-items: start;
}
.brand-copy p { color: var(--ink-2); }
.brand-copy .lede { color: var(--ink); }

.brand-keys {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}
.brand-keys li {
  display: grid;
  grid-template-columns: 56px 1fr;
  grid-template-areas: 'num title' 'num desc';
  gap: 2px 0;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}
.key-num {
  grid-area: num;
  font-family: var(--latin);
  font-size: 13px;
  font-weight: 600;
  color: var(--coral);
  letter-spacing: 0.1em;
  padding-top: 4px;
}
.brand-keys h3 {
  grid-area: title;
  font-family: var(--serif);
  font-size: 21px;
  letter-spacing: 0.08em;
}
.brand-keys p {
  grid-area: desc;
  margin: 4px 0 0;
  font-size: 14.5px;
  color: var(--ink-2);
}

/* ── 产品系列 ─────────────────────────────────────────────── */
.series-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(272px, 1fr));
  gap: 24px;
}

.series-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 28px 28px;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease),
              border-color 0.3s var(--ease);
}
.series-card:hover {
  transform: translateY(-5px);
  border-color: var(--coral-soft);
  box-shadow: var(--shadow);
}

.lens-card {
  width: 62px;
  height: 62px;
  margin-bottom: 22px;
  box-shadow: 0 8px 20px -10px rgba(43, 35, 32, 0.5);
}

.series-name {
  font-size: 23px;
  letter-spacing: 0.14em;
  font-weight: 600;
  margin-bottom: 12px;
}

.series-desc {
  font-size: 14.5px;
  color: var(--ink-2);
  min-height: 4.5em;
  margin-bottom: 22px;
}

.series-meta {
  border-top: 1px solid var(--line);
  padding-top: 16px;
  display: grid;
  gap: 8px;
}
.series-meta > div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  font-size: 13.5px;
}
.series-meta dt { color: var(--ink-3); }
.series-meta dd { margin: 0; color: var(--ink); font-weight: 500; }

/* ── 设计理念 ─────────────────────────────────────────────── */
.philo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 40px 36px;
}
.philo-item { border-top: 2px solid var(--coral-soft); padding-top: 24px; }
.philo-idx {
  display: block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--coral);
  margin-bottom: 14px;
}
.philo-item h3 {
  font-family: var(--serif);
  font-size: 22px;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}
.philo-item p { font-size: 14.5px; color: var(--ink-2); margin: 0; }

/* ── 购买渠道 ─────────────────────────────────────────────── */
.channel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 18px;
}
.channel-card {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas: 'name arrow' 'hint arrow';
  align-items: center;
  gap: 2px 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 24px 26px;
  transition: transform 0.28s var(--ease), border-color 0.28s var(--ease),
              box-shadow 0.28s var(--ease);
}
.channel-card:hover {
  transform: translateY(-4px);
  border-color: var(--coral-soft);
  box-shadow: var(--shadow);
}
.channel-name { grid-area: name; font-size: 17px; font-weight: 600; }
.channel-hint { grid-area: hint; font-size: 13px; color: var(--coral-deep); }
.channel-arrow {
  grid-area: arrow;
  font-size: 20px;
  color: var(--coral);
  transition: transform 0.28s var(--ease);
}
.channel-card:hover .channel-arrow { transform: translateX(5px); }

/* ── 合规 ─────────────────────────────────────────────────── */
.compliance { padding-top: 0; }
.compliance-box {
  background: var(--coral-wash);
  border: 1px solid var(--coral-soft);
  border-radius: var(--radius);
  padding: 46px 44px;
}
.compliance-title {
  font-family: var(--serif);
  font-size: 25px;
  letter-spacing: 0.06em;
  margin-bottom: 20px;
}
.compliance-strong {
  font-size: 15.5px;
  color: var(--ink);
  max-width: 62ch;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--coral-soft);
  margin-bottom: 26px;
}
.compliance-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px 32px;
  margin-bottom: 30px;
}
.compliance-meta dt { font-size: 12.5px; color: var(--ink-3); margin-bottom: 4px; }
.compliance-meta dd { font-weight: 500; }

.compliance-list { display: grid; gap: 9px; }
.compliance-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--ink-2);
}
.compliance-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--coral);
}

/* ── 联系 ─────────────────────────────────────────────────── */
.contact-wrap .section-head { margin-bottom: 36px; }
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 22px;
}
.contact-note { font-size: 14px; color: var(--ink-3); }

/* ── 页脚 ─────────────────────────────────────────────────── */
.site-footer {
  background: var(--ink);
  color: #E8DCD6;
  padding: 72px 0 44px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 200px 1fr;
  grid-template-areas:
    'brand nav'
    'brand legal';
  gap: 32px 48px;
  align-items: start;
}
.footer-brand { grid-area: brand; }
.footer-logo { width: 196px; height: auto; color: var(--coral); }

.footer-nav {
  grid-area: nav;
  display: flex;
  flex-wrap: wrap;
  gap: 14px 30px;
}
.footer-nav a {
  font-size: 14.5px;
  color: #E8DCD6;
  transition: color 0.22s var(--ease);
}
.footer-nav a:hover { color: var(--coral); }

.footer-legal {
  grid-area: legal;
  padding-top: 26px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 13px;
  color: #A99C96;
}
.footer-legal p { margin: 0 0 8px; }
.footer-legal a { color: #A99C96; border-bottom: 1px solid rgba(255, 255, 255, 0.2); }
.footer-legal a:hover { color: var(--coral); }
.footer-warn { max-width: 60ch; line-height: 1.7; }

/* ── 滚动进场动画 ─────────────────────────────────────────────
   仅在 JS 可用时（<html class="js">）才把元素藏起来。
   JS 加载失败时内容保持可见，不会白屏。
   ─────────────────────────────────────────────────────────── */
.reveal {
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.js .reveal {
  opacity: 0;
  transform: translateY(22px);
}
.js .reveal.is-in { opacity: 1; transform: none; }

/* ── 响应式 ───────────────────────────────────────────────── */
@media (max-width: 980px) {
  .hero-inner { grid-template-columns: 1fr; gap: 56px; }
  .hero-art { order: -1; }
  .lens-stage { max-width: 340px; }
  .brand-grid { grid-template-columns: 1fr; gap: 44px; }
  .footer-inner {
    grid-template-columns: 1fr;
    grid-template-areas: 'brand' 'nav' 'legal';
  }
}

@media (max-width: 760px) {
  .section { padding: 76px 0; }
  .hero { padding: 56px 0 72px; }
  .compliance-box { padding: 34px 24px; }

  .nav-toggle { display: flex; }
  .nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--cream);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 24px 40px -26px rgba(43, 35, 32, 0.4);
    padding: 8px 24px 20px;
    /* 收起态 */
    visibility: hidden;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity 0.26s var(--ease), transform 0.26s var(--ease),
                visibility 0.26s var(--ease);
  }
  .nav.is-open {
    visibility: visible;
    opacity: 1;
    transform: none;
  }
  .nav a {
    padding: 15px 0;
    font-size: 16px;
    border-bottom: 1px solid var(--line);
  }
  .nav a:last-child { border-bottom: 0; }
  .nav a::after { display: none; }
}

@media (max-width: 420px) {
  .wrap { padding: 0 18px; }
  .brand-logo { width: 126px; }
  .series-card { padding: 26px 22px 22px; }
}

/* ── 尊重系统的动效偏好 ───────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ── 打印 ─────────────────────────────────────────────────── */
@media print {
  .site-header, .nav-toggle, .hero-art, .hero-actions { display: none; }
  body { background: #fff; }
  .reveal { opacity: 1; transform: none; }
  .site-footer { background: #fff; color: #000; }
}