/* ============================================
   焕白·本草志 — 纸本墨色 / 手工品牌向
   少用渐变与「科技落地页」动效，偏编辑排版与留白
   ============================================ */

/* ---- CSS 变量 ---- */
:root {
  --color-bg-primary: #f2ede4;
  --color-bg-secondary: #e5dfd3;
  --color-bg-warm: #f7f2e9;
  --color-green-dark: #2a3128;
  --color-green-main: #3d4a36;
  --color-green-light: #5a6654;
  --color-green-pale: #dde6d8;
  --color-gold-dark: #6b5c45;
  --color-gold-main: #8a7a5c;
  --color-gold-light: #a89472;
  --color-text-primary: #2a2a26;
  --color-text-secondary: #55554d;
  --color-text-light: #6e6e66;
  --color-text-muted: #8a8578;
  --color-accent: #8b6914;
  --color-border: #cfc6b6;
  --color-white: #fdfcfa;
  --font-display: "Songti SC", "STSong", "SimSun", serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --space-xs: 4px; --space-sm: 8px; --space-md: 16px;
  --space-lg: 24px; --space-xl: 32px; --space-2xl: 48px;
  --space-3xl: 64px; --space-4xl: 88px;
  --radius-sm: 2px; --radius-md: 4px; --radius-lg: 6px;
  --radius-xl: 8px;
  --shadow-sm: 0 1px 3px rgba(42,49,40,0.06);
  --shadow-md: 0 4px 14px rgba(42,49,40,0.07);
  --shadow-lg: 0 10px 28px rgba(42,49,40,0.09);
  --shadow-xl: 0 18px 40px rgba(42,49,40,0.1);
  --transition-fast: 140ms ease; --transition-base: 240ms ease;
  --transition-slow: 400ms ease; --container-max: 1200px;
  --navbar-height: 78px;
}

/* ---- Reset ---- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
/*
  根字号固定为 px：Safari 与 Chrome 对 clamp()+vw 的根字号、text-size-adjust 计算不一致，
  易造成一边偏大、一边偏窄的观感。正文统一用 rem，大屏需要略大时改此处或调 body 级字号即可。
*/
html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}
body {
  font-family: var(--font-body); color: var(--color-text-primary);
  background-color: var(--color-bg-primary); line-height: 1.8; overflow-x: hidden;
  font-size: 1rem;
}
::selection { background: var(--color-green-pale); color: var(--color-green-dark); }
a { color: var(--color-green-main); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-gold-dark); }
img { max-width: 100%; height: auto; display: block; }

/* ---- Layout ---- */
.container { width: 100%; max-width: var(--container-max); margin: 0 auto; padding: 0 var(--space-lg); }
/* 稳定滚动条占位，减少 Chrome / Safari 因 overlay 滚动条导致的可用宽度差 */
@supports (scrollbar-gutter: stable) {
  html { scrollbar-gutter: stable; }
}
.section { padding: var(--space-4xl) 0; position: relative; }
.section--warm { background-color: var(--color-bg-warm); }
.section--green { background-color: var(--color-green-pale); }
.section--dark { background-color: var(--color-green-dark); color: white; }

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(242,237,228,0.92);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  transition: border-color var(--transition-base), background var(--transition-base);
}
.navbar--scrolled { box-shadow: var(--shadow-sm); background: rgba(247,242,233,0.97); }
.navbar__inner {
  display: flex; align-items: center; justify-content: space-between;
  min-height: var(--navbar-height); padding: 10px 0;
}
.navbar__logo {
  display: flex; flex-direction: column; align-items: flex-start; justify-content: center;
  gap: 1px; text-decoration: none; line-height: 1.2;
}
.navbar__logo-text {
  font-family: var(--font-display); font-size: 1.22rem; font-weight: 600;
  color: var(--color-green-dark); letter-spacing: 0.05em;
}
.navbar__logo-sub {
  font-size: 0.74rem; color: var(--color-text-muted);
  letter-spacing: 0.06em; font-weight: 400;
}
.navbar__menu { display: flex; align-items: center; gap: 32px; list-style: none; }
.navbar__link {
  font-size: 0.92rem; color: var(--color-text-secondary); position: relative;
  padding: 4px 0; transition: color var(--transition-fast); font-weight: 400;
}
.navbar__link::after {
  content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 1px;
  background: var(--color-green-main);
  transition: width var(--transition-base);
}
.navbar__link:hover, .navbar__link--active { color: var(--color-green-dark); }
.navbar__link:hover::after, .navbar__link--active::after { width: 100%; }

.navbar__toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 8px; }
.navbar__toggle span { display: block; width: 24px; height: 2px; background: var(--color-text-primary); transition: all var(--transition-base); }
.navbar__toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.navbar__toggle.active span:nth-child(2) { opacity: 0; }
.navbar__toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ============================================
   SECTION HEADER (通用)
   ============================================ */
.section-header { text-align: center; max-width: min(720px, 92vw); margin: 0 auto 56px; }
.section-header__label {
  font-size: 0.78rem; letter-spacing: 0.28em; text-transform: none;
  color: var(--color-text-muted); margin-bottom: 10px; font-weight: 400;
}
.section-header__label--on-dark { color: rgba(255,255,255,0.55); }
.section-header__title--on-dark { color: #f5f2eb !important; }
.divider--on-dark { background: rgba(255,255,255,0.22) !important; }
.section-header__title {
  font-family: var(--font-display); font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: var(--color-green-dark); margin-bottom: 12px; line-height: 1.3;
}
.section-header__desc { color: var(--color-text-secondary); font-size: 1rem; line-height: 1.8; }

.divider { width: 48px; height: 1px; background: var(--color-border); margin: 14px auto; }
.divider--center { margin-left: auto; margin-right: auto; }

/* ============================================
   BRAND INTRO (品牌简介区)
   ============================================ */
.brand-intro {
  padding-top: calc(var(--navbar-height) + 72px); padding-bottom: 72px; text-align: center;
  background: var(--color-bg-warm);
  position: relative;
  border-bottom: 1px solid var(--color-border);
}
.brand-intro__kicker {
  font-size: 0.76rem; letter-spacing: 0.12em; color: var(--color-text-muted);
  margin-bottom: 22px; padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
  display: inline-block; max-width: 90%;
}
.brand-intro__title {
  font-family: var(--font-display); font-size: clamp(2.2rem, 5.5vw, 3.25rem);
  font-weight: 600; color: var(--color-green-dark); line-height: 1.2;
  margin-bottom: 18px; letter-spacing: 0.12em;
}
.brand-intro__subtitle {
  font-family: var(--font-body); font-size: clamp(0.98rem, 2vw, 1.12rem);
  color: var(--color-text-secondary); font-weight: 400;
  line-height: 1.75; max-width: 22em; margin: 0 auto 32px;
}
.brand-intro__tagline {
  display: block; margin-top: 10px; font-size: 0.88em;
  color: var(--color-text-muted); letter-spacing: 0.04em;
}
.brand-intro__cta-group { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.brand-intro__poster-link {
  margin-top: 18px; font-size: 0.84rem;
}
.brand-intro__poster-link a {
  color: var(--color-text-muted);
  letter-spacing: 0.06em;
  border-bottom: 1px solid rgba(138,133,120,0.35);
  padding-bottom: 2px;
}
.brand-intro__poster-link a:hover { color: var(--color-green-main); border-bottom-color: var(--color-green-light); }

/* ============================================
   POSTER SHOWCASE (整张海报展示区)
   ============================================ */
.poster-showcase {
  padding: 72px 0; text-align: center;
  background: var(--color-bg-primary);
}
.poster-frame {
  display: inline-block;
  max-width: 100%;
  width: 100%;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
  transition: box-shadow var(--transition-base);
  background: var(--color-white);
}
.poster-frame:hover { box-shadow: var(--shadow-lg); }
.poster-frame img { width: 100%; height: auto; display: block; cursor: zoom-in; }
.poster-caption {
  margin-top: 20px; font-size: 0.82rem; color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

/* ============================================
   VIDEO SHOWCASE（宣传短片）
   ============================================ */
.video-showcase {
  padding: 72px 0;
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.video-frame {
  max-width: 100%;
  margin: 0 auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  background: #1c1c1c;
}
.video-frame video {
  width: 100%;
  height: auto;
  display: block;
  vertical-align: top;
}
.video-caption {
  margin-top: 18px; text-align: center;
  font-size: 0.82rem; color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

/* 产品页内嵌视频（与主图并列或全宽） */
.product-video {
  margin-bottom: var(--space-2xl);
}
.product-video .video-frame { max-width: none; }
.product-video__title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--color-green-dark);
  margin-bottom: var(--space-md);
  font-weight: 600;
}

/* ============================================
   产品详情页（product.html）
   ============================================ */
.product-page__media-label {
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
  font-weight: 400;
}

.product-showcase {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.12fr);
  gap: var(--space-2xl);
  align-items: start;
  margin-top: var(--space-md);
}

.product-gallery__main img {
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  cursor: zoom-in;
  transition: box-shadow var(--transition-base);
}
.product-gallery__main img:hover { box-shadow: var(--shadow-lg); }

.product-gallery__hint {
  text-align: center;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
  letter-spacing: 0.04em;
}

.product-info h2 {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  color: var(--color-green-dark);
  font-weight: 600;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
  line-height: 1.35;
}
.product-info__subtitle {
  font-size: 0.86rem;
  color: var(--color-text-muted);
  font-style: italic;
  margin-bottom: var(--space-xl);
}

.product-spec-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  margin-bottom: var(--space-sm);
}
.product-spec-item {
  text-align: center;
  padding: var(--space-md) var(--space-sm);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}
.product-spec-item__value {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-green-dark);
  line-height: 1.3;
}
.product-spec-item__label {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  margin-top: 6px;
  letter-spacing: 0.04em;
}

.product-block-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--color-green-dark);
  margin-bottom: var(--space-lg);
  padding-left: 12px;
  border-left: 3px solid var(--color-gold-main);
  margin-top: var(--space-xl);
  font-weight: 600;
}
.product-block-title:first-of-type { margin-top: 0; }

.effect-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.effect-list > li {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}
.effect-list > li:last-child { border-bottom: none; }
.effect-list__num {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-white);
  background: var(--color-green-main);
  border-radius: var(--radius-sm);
}
.effect-list__heading {
  color: var(--color-green-dark);
  display: block;
  margin-bottom: 4px;
  font-size: 0.92rem;
}

.product-dual-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  margin-top: var(--space-3xl);
}

.product-panel {
  background: var(--color-white);
  padding: var(--space-2xl);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}
.product-panel__title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--color-green-dark);
  margin-bottom: var(--space-xl);
  padding-left: 12px;
  border-left: 3px solid var(--color-gold-main);
  font-weight: 600;
}

.product-bullet-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.product-bullet-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.92rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}
.product-bullet-list li:last-child { border-bottom: none; }
.product-bullet-list__dot {
  width: 6px;
  height: 6px;
  background: var(--color-gold-main);
  border-radius: 50%;
  min-width: 6px;
  margin-top: 8px;
}

.usage-steps {
  list-style: none;
  list-style-type: none;
  padding: 0;
  margin: 0;
  counter-reset: step;
}
.usage-steps li::marker { content: ''; }
.usage-steps li {
  position: relative;
  padding: 12px 0 12px 36px;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.92rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}
.usage-steps li:last-child { border-bottom: none; }
.usage-steps li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 0;
  top: 12px;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-gold-dark);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  background: var(--color-bg-warm);
}

.product-warm-tip {
  margin-top: var(--space-2xl);
  background: var(--color-bg-warm);
  padding: var(--space-xl) var(--space-2xl);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-gold-main);
  box-shadow: var(--shadow-sm);
}
.product-warm-tip__title {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--color-gold-dark);
  margin-bottom: var(--space-md);
  font-weight: 600;
}
.product-warm-tip__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 20px;
  font-size: 0.88rem;
  color: var(--color-text-secondary);
}
.product-warm-tip__list li {
  display: flex;
  gap: 8px;
  align-items: flex-start;
}
.product-warm-tip__mark {
  color: var(--color-gold-dark);
  flex-shrink: 0;
}

@media (max-width: 960px) {
  .product-showcase {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  .product-spec-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .product-dual-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    margin-top: var(--space-2xl);
  }
  .product-warm-tip__list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .product-spec-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-body); font-size: 0.9rem; font-weight: 500;
  padding: 12px 26px; border-radius: var(--radius-sm); border: none;
  cursor: pointer; transition: background var(--transition-base), color var(--transition-base), border-color var(--transition-base);
  text-decoration: none; letter-spacing: 0.06em;
}
.btn--primary {
  background: var(--color-green-dark);
  color: var(--color-white);
}
.btn--primary:hover { background: var(--color-green-main); color: var(--color-white); }
.btn--secondary {
  background: transparent; color: var(--color-green-dark);
  border: 1px solid var(--color-border);
}
.btn--secondary:hover { border-color: var(--color-green-main); background: rgba(61,74,54,0.04); color: var(--color-green-dark); }
.btn--gold {
  background: var(--color-gold-dark);
  color: var(--color-white);
}
.btn--gold:hover { background: var(--color-gold-main); color: var(--color-white); }

/* ============================================
   FEATURES GRID (核心亮点 - 4列)
   ============================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-card {
  padding: 28px 22px; background: var(--color-white);
  border-radius: var(--radius-md); border: 1px solid var(--color-border);
  text-align: left; transition: border-color var(--transition-base);
}
.feature-card:hover { border-color: var(--color-green-light); }

.feature-card__icon {
  width: 44px; height: 44px; margin: 0 0 14px 0;
  display: flex; align-items: center; justify-content: center;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-green-main);
}
.feature-card__title {
  font-family: var(--font-display); font-size: 1.02rem; font-weight: 600;
  color: var(--color-green-dark); margin-bottom: 8px;
}
.feature-card__text { font-size: 0.84rem; color: var(--color-text-secondary); line-height: 1.65; }

/* ============================================
   INGREDIENTS GRID (四重草本 — 一行4列，图片对齐)
   ============================================ */
.ingredients-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: stretch;
}
.ingredient-card {
  background: var(--color-white); border-radius: var(--radius-md); overflow: hidden;
  border: 1px solid var(--color-border); transition: box-shadow var(--transition-base);
  display: flex; flex-direction: column;
}
.ingredient-card:hover { box-shadow: var(--shadow-md); }
.ingredient-card__image {
  width: 100%; height: 180px; overflow: hidden; position: relative; 
  background: var(--color-bg-secondary); flex-shrink: 0;
}
.ingredient-card__image img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.4,0,0.2,1);
}
.ingredient-card:hover .ingredient-card__image img { transform: scale(1.03); }
.ingredient-card__body { 
  padding: 20px; flex: 1; display: flex; flex-direction: column;
  text-align: center;
}
.ingredient-card__name {
  font-family: var(--font-display); font-size: 1.1rem;
  color: var(--color-green-dark); margin-bottom: 4px; text-align: center;
}
.ingredient-card__latin {
  font-size: 0.78rem; color: var(--color-text-muted);
  font-style: italic; margin-bottom: 10px; text-align: center;
}
.ingredient-card__tag {
  display: inline-block; font-size: 0.66rem; padding: 2px 8px;
  background: var(--color-bg-warm); color: var(--color-gold-dark);
  border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  letter-spacing: 0.06em; margin-bottom: 10px;
  align-self: center;
}
.ingredient-card__desc { font-size: 0.82rem; color: var(--color-text-secondary); line-height: 1.65; text-align: center; }

/* ============================================
   CUSTOMIZER PLATFORM (交互式定制体验区)
   ============================================ */
.customizer-section { padding: 96px 0; }
.customizer { max-width: 100%; margin: 0 auto; }

/* 定制区标题：中文在 Safari 下避免不自然断行 */
.customizer-section .section-header__title {
  word-break: keep-all;
  line-break: strict;
}

/* 步骤进度条（Safari flex 子项默认 min-width:auto 易把整行撑怪） */
.progress-bar {
  display: flex; align-items: center; justify-content: center; gap: 0;
  margin-bottom: 48px; padding: 0 20px;
  flex-wrap: nowrap;
}
.progress-bar__step {
  display: flex; align-items: center; gap: 10px;
  flex-shrink: 0;
}
.progress-bar__dot {
  width: 38px; height: 38px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem; font-weight: 600;
  background: var(--color-bg-secondary); color: var(--color-text-muted);
  transition: all 0.4s cubic-bezier(0.4,0,0.2,1);
  border: 2.5px solid var(--color-border);
}
.progress-bar__dot.completed,
.progress-bar__dot.active {
  background: var(--color-green-dark);
  color: white; border-color: var(--color-green-dark);
}
.progress-bar__line {
  flex: 1 1 32px;
  width: 52px;
  max-width: 72px;
  min-width: 20px;
  height: 2.5px;
  background: var(--color-border);
  transition: background 0.4s ease;
  border-radius: 2px;
}
.progress-bar__line.completed { background: var(--color-green-main); }

/* 定制步骤卡片 */
.customizer-step {
  background: white; border-radius: var(--radius-xl);
  padding: 36px 32px; margin-bottom: 24px;
  border: 1.5px solid var(--color-border);
  transition: all 0.4s cubic-bezier(0.4,0,0.2,1);
  position: relative; overflow: hidden;
}
.customizer-step::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: var(--color-green-main);
  opacity: 0; transition: opacity 0.4s ease;
}
.customizer-step.active::before { opacity: 1; }
.customizer-step.active {
  border-color: var(--color-green-light);
  box-shadow: var(--shadow-sm);
}

.customizer-step__header {
  display: flex; align-items: flex-start; gap: 16px; margin-bottom: 24px;
}
/* 标题+说明的容器：占满剩余宽且允许收缩，避免 WebKit 下溢出/叠字 */
.customizer-step__header > div:last-child {
  flex: 1;
  min-width: 0;
}
.customizer-step__number {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px;
  background: var(--color-green-dark);
  color: white; border-radius: var(--radius-sm);
  font-size: 0.9rem; font-weight: 600; flex-shrink: 0;
}
.customizer-step__title {
  font-family: var(--font-display); font-size: 1.15rem;
  color: var(--color-green-dark); font-weight: 600;
  word-break: keep-all;
}
.customizer-step__desc {
  font-size: 0.84rem;
  color: var(--color-text-muted);
  margin-top: 6px;
  line-height: 1.55;
}

/* 选项网格：每步固定 4 项，用等分列 + minmax(0,1fr)，避免 auto-fill 与内容最小宽度导致列宽/间隙不均（Safari 尤明显） */
.option-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  align-items: stretch;
}
.option-btn {
  -webkit-appearance: none;
  appearance: none;
  margin: 0;
  font: inherit;
  min-width: 0;
  width: 100%;
  box-sizing: border-box;
  padding: 18px 16px; border: 2px solid var(--color-border);
  border-radius: var(--radius-lg); background: white;
  font-family: var(--font-body); font-size: 0.88rem;
  color: var(--color-text-secondary); cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4,0,0.2,1);
  text-align: center; position: relative;
  overflow-wrap: break-word;
  word-break: break-word;
}
.option-btn small { display: block; margin-top: 6px; font-size: 0.76rem; color: var(--color-text-muted); font-weight: 400; }
.option-btn:hover {
  border-color: var(--color-green-light); background: rgba(221,230,216,0.35);
}
.option-btn--active {
  border-color: var(--color-green-main); background: var(--color-green-pale);
  color: var(--color-green-dark); font-weight: 600;
}

/* 结果面板 */
.result-panel {
  background: var(--color-green-dark);
  border-radius: var(--radius-md); padding: 36px 28px;
  color: white; text-align: center; margin-top: 28px;
  border: 1px solid rgba(0,0,0,0.12);
}
.result-panel__title {
  font-family: var(--font-display); font-size: 1.4rem;
  margin-bottom: 28px; position: relative;
}
.result-panel__metrics {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 16px; margin-bottom: 28px; position: relative;
}
.metric {
  min-width: 0;
  background: rgba(255,255,255,0.07); border-radius: var(--radius-lg);
  padding: 20px 16px; border: 1px solid rgba(255,255,255,0.08);
  transition: all 0.35s ease;
}
.metric:hover { background: rgba(255,255,255,0.1); }
.metric__label {
  font-size: 0.76rem; opacity: 0.72; margin-bottom: 8px;
  letter-spacing: 0.04em;
}
.metric__value {
  font-family: var(--font-display); font-size: 1.8rem;
  font-weight: 700; transition: all 0.4s ease;
  line-height: 1.2;
  overflow-wrap: break-word;
}
.metric__value.updating {
  animation: scorePop 0.4s cubic-bezier(0.4,0,0.2,1);
}
@keyframes scorePop {
  0% { transform: scale(1); }
  50% { transform: scale(1.2); color: var(--color-gold-light); }
  100% { transform: scale(1); }
}

/* 配方卡片生成 */
.recipe-card {
  background: rgba(255,255,255,0.11);
  border-radius: var(--radius-lg);
  padding: 24px 28px; text-align: left; font-size: 0.88rem;
  border: 1px solid rgba(255,255,255,0.1);
  position: relative;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.recipe-card__row {
  display: flex; justify-content: space-between; align-items: flex-start;
  gap: 12px;
  padding: 10px 0; border-bottom: 1px solid rgba(255,255,255,0.07);
}
.recipe-card__row:last-child { border-bottom: none; }
.recipe-card__label {
  color: rgba(255,255,255,0.58);
  flex-shrink: 0;
  max-width: 42%;
}
.recipe-card__value {
  font-weight: 600;
  text-align: right;
  min-width: 0;
  word-break: break-word;
}
.recipe-card__ingredients {
  margin-top: 16px; padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,0.12);
}
.recipe-card__rating {
  display: inline-block; margin-top: 16px;
  padding: 6px 14px; background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: var(--radius-sm); color: rgba(255,255,255,0.85);
  font-weight: 500; font-size: 0.84rem;
}
.recipe-card__hint {
  margin-top: 12px; padding: 8px 10px; font-size: 0.8rem; line-height: 1.5;
  color: rgba(255,255,255,0.88);
  background: rgba(212,168,75,0.14);
  border: 1px solid rgba(212,168,75,0.28);
  border-radius: var(--radius-sm);
}
.recipe-card__hint[hidden] { display: none !important; }
.recipe-card__fineprint {
  margin-top: 14px; font-size: 0.72rem; line-height: 1.65;
  color: rgba(255,255,255,0.42); text-align: left;
}
.recipe-card__actions {
  display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px;
  justify-content: center;
}
.result-panel .recipe-card__actions .btn--secondary {
  border-color: rgba(255,255,255,0.28); color: rgba(255,255,255,0.92);
}
.result-panel .recipe-card__actions .btn--secondary:hover {
  background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.4); color: white;
}
.btn--compact { padding: 8px 16px; font-size: 0.82rem; letter-spacing: 0.04em; }
.customizer-step__count { font-size: 0.78rem; font-weight: 400; color: var(--color-text-muted); }

/* ============================================
   BRAND PHILOSOPHY (品牌理念)
   ============================================ */
.brand-values {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
}
.brand-value-card {
  background: var(--color-white); padding: 32px 26px;
  border-radius: var(--radius-md); border: 1px solid var(--color-border);
  text-align: center; transition: border-color var(--transition-base);
}
.brand-value-card:hover { border-color: var(--color-green-light); }
.brand-value-card__char {
  font-family: var(--font-display); font-size: 2.4rem; font-weight: 700; margin-bottom: 20px;
}
.brand-value-card__char.green { color: var(--color-green-dark); }
.brand-value-card__char.gold { color: var(--color-gold-dark); }
.brand-value-card__char.accent { color: var(--color-accent); }
.brand-value-card__title {
  font-family: var(--font-display); font-size: 1.1rem;
  color: var(--color-green-dark); margin-bottom: 14px;
}
.brand-value-card__desc { color: var(--color-text-secondary); font-size: 0.88rem; line-height: 1.85; }

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--color-green-dark); color: rgba(255,255,255,0.78);
  padding: 64px 0 28px;
}
.footer__inner {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 36px; margin-bottom: 44px;
}
.footer__section-title {
  font-family: var(--font-display); font-size: 1rem;
  color: white; margin-bottom: 16px; font-weight: 600;
}
.footer__links { list-style: none; }
.footer__links li { margin-bottom: 8px; }
.footer__links a {
  color: rgba(255,255,255,0.62); font-size: 0.86rem;
  transition: all 0.2s ease;
}
.footer__links a:hover { color: var(--color-gold-light); padding-left: 4px; }
.footer__bottom {
  text-align: center; padding-top: 28px;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 0.81rem; color: rgba(255,255,255,0.38);
}

/* ============================================
   BACK TO TOP
   ============================================ */
.back-to-top {
  position: fixed; bottom: 32px; right: 32px;
  width: 46px; height: 46px;
  background: var(--color-green-main); color: white;
  border: none; border-radius: 50%;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden; transform: translateY(20px);
  transition: all 0.35s cubic-bezier(0.4,0,0.2,1);
  box-shadow: var(--shadow-md); z-index: 900;
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--color-green-dark); transform: translateY(-4px); box-shadow: var(--shadow-lg); }

/* ============================================
   LIGHTBOX
   ============================================ */
.lightbox-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.89); z-index: 2000;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden; transition: all 0.35s ease;
  backdrop-filter: blur(12px);
}
.lightbox-overlay.active { opacity: 1; visibility: visible; }
.lightbox-overlay img {
  max-width: 92vw; max-height: 92vh; object-fit: contain;
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 80px rgba(0,0,0,0.5);
  transform: scale(0.92); transition: transform 0.4s cubic-bezier(0.4,0,0.2,1);
}
.lightbox-overlay.active img { transform: scale(1); }
.lightbox-close {
  position: absolute; top: 24px; right: 24px;
  width: 46px; height: 46px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 50%; color: white; font-size: 1.5rem;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: all 0.2s ease;
}
.lightbox-close:hover { background: rgba(255,255,255,0.25); }

/* ============================================
   ANIMATION SYSTEM
   ============================================ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.animate-in { animation: fadeInUp 0.5s ease forwards; opacity: 0; }

.reveal {
  opacity: 0; transform: translateY(14px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s !important; }
.reveal-delay-2 { transition-delay: 0.2s !important; }
.reveal-delay-3 { transition-delay: 0.3s !important; }
.reveal-delay-4 { transition-delay: 0.4s !important; }

.reveal-left {
  opacity: 0; transform: translateX(-40px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}
.reveal-left.visible { opacity: 1; transform: translateX(0); }
.reveal-right {
  opacity: 0; transform: translateX(40px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}
.reveal-right.visible { opacity: 1; transform: translateX(0); }

.count-up { display: inline-block; }

/* ============================================
   PAGE HERO（内页顶栏）
   ============================================ */
.page-hero {
  padding-top: calc(var(--navbar-height) + 32px);
  padding-bottom: var(--space-2xl);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg-warm);
}
.page-hero__eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.28em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
  font-weight: 400;
}
.page-hero__title {
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 3.5vw, 2.05rem);
  color: var(--color-green-dark);
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: 0.08em;
}
.page-hero__desc {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  max-width: 36em;
  line-height: 1.75;
}
.page-hero__note {
  margin-top: var(--space-md);
  font-size: 0.82rem;
  color: var(--color-text-muted);
  max-width: 40em;
  line-height: 1.65;
}

/* ============================================
   成分实验室页（ingredients.html）
   ============================================ */
.container--narrow { max-width: 760px; }

.ingredients-subnav {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-md) 0;
  position: sticky;
  top: var(--navbar-height);
  z-index: 99;
}
.ingredients-subnav__inner {
  display: flex; flex-wrap: wrap; justify-content: center; align-items: center;
  gap: var(--space-sm);
}
.ingredients-subnav__link {
  font-size: 0.84rem; color: var(--color-text-secondary);
  padding: 6px 14px; border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  transition: border-color var(--transition-fast), color var(--transition-fast), background var(--transition-fast);
}
.ingredients-subnav__link:hover {
  border-color: var(--color-green-main);
  color: var(--color-green-dark);
  background: rgba(61,74,54,0.04);
}

.content-block {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-xl) var(--space-lg);
  box-shadow: var(--shadow-sm);
}
.content-block p {
  font-size: 0.96rem; line-height: 1.9; color: var(--color-text-secondary);
  margin: 0;
}

.synergy-diagram {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}
.synergy-item {
  text-align: center;
  padding: var(--space-lg) var(--space-md);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}
.synergy-item__icon {
  width: 44px; height: 44px; margin: 0 auto 12px;
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-white); font-weight: 700; font-size: 1rem;
  font-family: var(--font-display);
}
.synergy-item__icon--inhibit { background: var(--color-green-main); }
.synergy-item__icon--repair { background: var(--color-gold-dark); }
.synergy-item__icon--bright { background: var(--color-accent); }
.synergy-item__icon--blend { background: var(--color-green-dark); }
.synergy-item__name {
  font-size: 0.88rem; font-weight: 600; color: var(--color-green-dark);
  margin-bottom: 6px; line-height: 1.4;
}
.synergy-item__role {
  font-size: 0.78rem; color: var(--color-text-muted); line-height: 1.5;
}

.ingredient-detail {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--space-2xl);
  align-items: start;
  margin-bottom: var(--space-3xl);
  padding-bottom: var(--space-3xl);
  border-bottom: 1px solid var(--color-border);
}
.ingredient-detail:last-of-type { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.ingredient-detail.reverse .ingredient-detail__image { order: 2; }
.ingredient-detail.reverse .ingredient-detail__content { order: 1; }
.ingredient-detail__image img {
  width: 100%; height: auto; display: block;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  cursor: zoom-in;
}
.ingredient-detail__content { min-width: 0; }
.ingredient-detail__badge {
  display: inline-block; font-size: 0.72rem; letter-spacing: 0.12em;
  padding: 4px 10px; border-radius: var(--radius-sm);
  margin-bottom: var(--space-sm);
  border: 1px solid var(--color-border);
}
.ingredient-detail__title {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  color: var(--color-green-dark);
  font-weight: 600;
  margin-bottom: 4px; letter-spacing: 0.06em;
}
.ingredient-detail__latin {
  font-size: 0.86rem; color: var(--color-text-muted);
  font-style: italic; margin-bottom: var(--space-lg);
}
.ingredient-detail__section-title {
  font-family: var(--font-display);
  font-size: 0.95rem; color: var(--color-gold-dark);
  margin: var(--space-lg) 0 var(--space-sm);
  font-weight: 600;
}
.ingredient-detail__text {
  font-size: 0.92rem; line-height: 1.85; color: var(--color-text-secondary);
  margin: 0 0 var(--space-md);
}
.ingredient-detail__tags {
  display: flex; flex-wrap: wrap; gap: 8px;
  margin-bottom: var(--space-md);
}
.ingredient-detail__tag {
  font-size: 0.72rem; padding: 4px 10px;
  background: var(--color-bg-warm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
}
.ingredient-detail__meta {
  font-size: 0.78rem; line-height: 1.65;
  color: var(--color-text-muted);
  padding-top: var(--space-md);
  margin-top: var(--space-sm);
  border-top: 1px solid var(--color-border);
}
.ingredient-detail__figure-note {
  font-size: 0.76rem; color: var(--color-text-muted);
  margin-top: var(--space-sm); line-height: 1.5;
}

.placeholder-graphic {
  min-height: 260px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  background: var(--color-bg-secondary);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  text-align: center;
}

.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
}
.data-table {
  width: 100%; min-width: 520px;
  border-collapse: collapse;
  font-size: 0.84rem;
}
.data-table caption {
  caption-side: top; text-align: left;
  padding: var(--space-md) var(--space-md) var(--space-sm);
  font-size: 0.82rem; color: var(--color-text-muted);
  line-height: 1.5;
}
.data-table th,
.data-table td {
  border-bottom: 1px solid var(--color-border);
  padding: 10px 12px;
  text-align: left; vertical-align: top;
}
.data-table thead th {
  background: var(--color-bg-warm);
  color: var(--color-green-dark);
  font-weight: 600;
  font-size: 0.8rem;
}
.data-table tbody tr:nth-child(even) { background: rgba(245,240,232,0.35); }
.data-table tbody tr:hover { background: rgba(221,230,216,0.25); }

.section-cta {
  text-align: center;
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-primary);
}
.section-cta__text {
  font-size: 0.92rem; color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
  max-width: 28em; margin-left: auto; margin-right: auto;
}
.section-cta__btns {
  display: flex; flex-wrap: wrap; gap: 12px; justify-content: center;
  align-items: center;
}

/* ============================================
   关于页（about.html）
   ============================================ */
.about-subnav {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-md) 0;
  position: sticky;
  top: var(--navbar-height);
  z-index: 99;
}
.about-subnav__inner {
  display: flex; flex-wrap: wrap; justify-content: center; gap: var(--space-sm);
}
.about-subnav__link {
  font-size: 0.84rem; color: var(--color-text-secondary);
  padding: 6px 14px; border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  transition: border-color var(--transition-fast), color var(--transition-fast), background var(--transition-fast);
}
.about-subnav__link:hover {
  border-color: var(--color-green-main);
  color: var(--color-green-dark);
  background: rgba(61,74,54,0.04);
}

.story-panel {
  position: relative;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-xl) var(--space-xl) var(--space-xl) calc(var(--space-xl) + 10px);
  box-shadow: var(--shadow-sm);
}
.story-panel::before {
  content: '';
  position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  background: var(--color-green-main);
}
.story-panel p {
  font-size: 0.98rem; line-height: 2; color: var(--color-text-secondary);
  margin: 0 0 1.1em;
}
.story-panel p:last-child { margin-bottom: 0; }

.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  max-width: 1000px;
  margin: 0 auto;
}
.team-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-base);
}
.team-card:hover { border-color: var(--color-green-light); }
.team-card__avatar {
  width: 48px; height: 48px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-size: 1.15rem; font-weight: 700;
  color: var(--color-white);
  background: var(--color-green-dark);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-md);
}
.team-card__role {
  font-family: var(--font-display);
  font-size: 1.05rem; font-weight: 600;
  color: var(--color-green-dark);
  margin-bottom: var(--space-sm);
}
.team-card__duties {
  font-size: 0.86rem; line-height: 1.75;
  color: var(--color-text-secondary);
  margin: 0;
}

.about-competition {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-2xl);
  text-align: center;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  max-width: 720px;
  margin: 0 auto;
}
.about-competition__lead {
  font-family: var(--font-display);
  font-size: 1.12rem;
  color: var(--color-green-dark);
  line-height: 1.85;
  margin: 0 0 var(--space-xl);
}
.about-competition__cards {
  display: flex; flex-wrap: wrap; gap: var(--space-md);
  justify-content: center;
}
.about-competition__card {
  background: var(--color-bg-warm);
  padding: var(--space-lg) var(--space-xl);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  min-width: 132px;
}
.about-competition__card-value {
  font-family: var(--font-display);
  font-size: 1.65rem; font-weight: 700;
  color: var(--color-green-dark);
  line-height: 1.2;
}
.about-competition__card-value--gold { color: var(--color-gold-dark); font-size: 1.65rem; }
.about-competition__card-value--sm { font-size: 1.25rem; color: var(--color-green-main); }
.about-competition__card-label {
  font-size: 0.78rem; color: var(--color-text-muted);
  margin-top: 6px;
}
.about-competition__note {
  margin-top: var(--space-xl);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  max-width: 36em;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================
   DATA STATS (数据指标区块)
   ============================================ */
.data-stats {
  background: var(--color-green-dark);
  padding: 68px 0;
  position: relative;
  border-top: 1px solid rgba(0,0,0,0.08);
  border-bottom: 1px solid rgba(0,0,0,0.08);
}
.data-stats__inner {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 32px; position: relative; text-align: center;
}
.data-stat-card {
  padding: 36px 20px;
  background: rgba(255,255,255,0.06);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255,255,255,0.08);
  transition: all 0.4s cubic-bezier(0.4,0,0.2,1);
}
.data-stat-card:hover { background: rgba(255,255,255,0.09); }
.data-stat-card__number {
  font-family: var(--font-display); font-size: 3rem; font-weight: 700;
  color: var(--color-gold-light); line-height: 1;
  margin-bottom: 8px; letter-spacing: -0.02em;
}
.data-stat-card__unit { font-size: 1.8rem; }
.data-stat-card__label {
  font-size: 0.88rem; color: rgba(255,255,255,0.75);
  letter-spacing: 0.08em;
}
.data-stat-card__desc {
  font-size: 0.82rem; color: rgba(255,255,255,0.5);
  margin-top: 8px; line-height: 1.5;
}

/* ============================================
   TESTIMONIALS (客户评价) — 暂存
   ============================================ */

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 1100px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  /* .ingredients-grid { grid-template-columns: repeat(2, 1fr); } */
  .result-panel__metrics { grid-template-columns: repeat(2, 1fr); }
  .brand-values { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .navbar__menu {
    position: fixed; top: var(--navbar-height); left: 0; right: 0;
    background: white; flex-direction: column; padding: 24px; gap: 14px;
    box-shadow: var(--shadow-xl); transform: translateY(-110%);
    transition: transform var(--transition-base);
  }
  .navbar__menu.open { transform: translateY(0); }
  .navbar__toggle { display: flex; }

  .brand-intro__cta-group { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
  .poster-frame { border-radius: var(--radius-lg); }

  .section { padding: 64px 0; }
  .customizer-section { padding: 64px 0; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .ingredients-grid { grid-template-columns: repeat(2, 1fr); }
  .option-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__inner { grid-template-columns: 1fr; text-align: center; }
  .result-panel__metrics { grid-template-columns: 1fr 1fr; }
  .brand-values { grid-template-columns: 1fr; }
  .customizer-step { padding: 24px 20px; }

  .back-to-top { bottom: 20px; right: 20px; width: 42px; height: 42px; }

  .synergy-diagram { grid-template-columns: repeat(2, 1fr); }
  .ingredient-detail,
  .ingredient-detail.reverse {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  .ingredient-detail.reverse .ingredient-detail__image,
  .ingredient-detail.reverse .ingredient-detail__content { order: unset; }

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

@media (max-width: 480px) {
  html { font-size: 15px; }
  .option-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .result-panel__metrics { grid-template-columns: 1fr; }
  .progress-bar__line {
    flex: 0 0 24px;
    width: 24px;
    min-width: 18px;
    max-width: 28px;
  }
  .customizer-step__header { flex-wrap: wrap; }
  .customizer-step__desc { margin-left: 0; width: 100%; margin-top: 4px; }
  .synergy-diagram { grid-template-columns: 1fr; }
}

/* 减少动画：尊重系统「减弱动态效果」设置 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal, .reveal-left, .reveal-right {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  .animate-in { animation: none !important; opacity: 1 !important; }
  .count-up { transition: none; }
}