/* ============================================================
   必佐营养 · v0.3 现代升级叠加层
   仅在 index.html 引入,其他页面不受影响。
   ============================================================ */

:root {
  --v3-blur:        saturate(180%) blur(20px);
  --v3-aurora-1:    rgba(196, 145, 90, 0.18);
  --v3-aurora-2:    rgba(45, 90, 71, 0.22);
  --v3-aurora-3:    rgba(232, 240, 236, 0.45);
  --v3-line:        rgba(26, 26, 26, 0.08);
  --v3-line-soft:   rgba(26, 26, 26, 0.04);
  --v3-shadow-sm:   0 1px 2px rgba(26,26,26,0.04), 0 2px 6px rgba(26,26,26,0.04);
  --v3-shadow-md:   0 6px 16px rgba(26,26,26,0.06), 0 14px 32px rgba(26,26,26,0.05);
  --v3-shadow-lg:   0 18px 48px rgba(26,26,26,0.10), 0 4px 12px rgba(26,26,26,0.05);
  --v3-ease:        cubic-bezier(0.22, 1, 0.36, 1);
  --v3-ease-soft:   cubic-bezier(0.65, 0, 0.35, 1);
  --v3-dur-1:       480ms;
  --v3-dur-2:       800ms;
  --v3-dur-3:       1200ms;
}

*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb {
  background: rgba(26,26,26,0.12);
  border-radius: 999px;
  border: 2px solid transparent;
  background-clip: padding-box;
}
*::-webkit-scrollbar-thumb:hover { background: rgba(26,26,26,0.22); background-clip: padding-box; }

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

body { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

/* ===== 顶导 · 玻璃态 ===== */
.nav {
  background: rgba(253, 252, 250, 0.62);
  backdrop-filter: var(--v3-blur);
  -webkit-backdrop-filter: var(--v3-blur);
  border-bottom: 1px solid var(--v3-line-soft);
}
.nav--scrolled {
  background: rgba(253, 252, 250, 0.86);
  border-bottom-color: var(--v3-line);
  box-shadow: 0 1px 0 rgba(26,26,26,0.02), 0 8px 24px rgba(26,26,26,0.03);
}
.nav-brand img { height: 30px; transition: transform var(--v3-dur-1) var(--v3-ease); }
.nav-brand:hover img { transform: translateX(-2px) rotate(-1deg); }
.nav-links a { font-size: 13.5px; font-weight: 500; letter-spacing: 0.01em; }
.nav-links a::after { height: 1px; background: linear-gradient(90deg, var(--c-primary), var(--c-accent)); }
.nav-issue { font-size: 10px; letter-spacing: 0.16em; border-color: var(--v3-line); position: relative; overflow: hidden; }
/* v0.4 老年友好 · 字号切换 (Aa)
   - 4 档 S/M/L/XL,对应 --fs-scale 0.92/1/1.15/1.3
   - 当前激活按钮用琥珀色字 + 琥珀色浅底
   - mobile 上隐藏(抽屉里有第二组) */
.nav-fs-scale {
  display: inline-flex; align-items: center; gap: 2px;
  padding: 4px 6px;
  border: 1px solid var(--v3-line);
  border-radius: var(--r-pill);
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.nav-fs-scale__icon {
  font-family: var(--font-display-en);
  font-style: italic; font-weight: 500;
  font-size: 14px;
  color: var(--c-primary);
  padding: 0 6px 0 4px;
  border-right: 1px solid var(--v3-line-soft);
  margin-right: 2px;
  line-height: 1;
}
.nav-fs-scale__btn {
  appearance: none; -webkit-appearance: none;
  border: 0; background: transparent;
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--c-muted);
  width: 24px; height: 24px;
  border-radius: var(--r-pill);
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease-std),
              color var(--dur-fast) var(--ease-std);
  line-height: 1;
}
.nav-fs-scale__btn:hover { color: var(--c-ink); background: var(--c-secondary); }
.nav-fs-scale__btn[aria-pressed="true"] {
  color: var(--c-accent);
  background: var(--c-accent-soft);
  font-weight: 600;
}
@media (max-width: 880px) {
  .nav-fs-scale { display: none; }
}
.nav-issue::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, rgba(45,90,71,0.04), transparent);
  transform: translateX(-100%);
  animation: issueSweep 6s var(--v3-ease-soft) infinite;
}
@keyframes issueSweep { 0% { transform: translateX(-100%); } 60% { transform: translateX(100%); } 100% { transform: translateX(100%); } }
.nav-cta .btn { font-size: 13px; letter-spacing: 0.01em; height: 36px; padding: 0 18px; border-radius: 999px; }
.nav-cta .btn-ghost { color: var(--c-ink); }
.nav-cta .btn-ghost:hover { background: var(--c-secondary-warm); }
.nav-cta .btn-primary {
  background: var(--c-ink); color: var(--c-white); border-color: var(--c-ink);
  box-shadow: 0 4px 14px rgba(26,26,26,0.18);
}
.nav-cta .btn-primary:hover {
  background: var(--c-primary); border-color: var(--c-primary);
  box-shadow: 0 8px 24px rgba(45,90,71,0.28); transform: translateY(-1px);
}

/* ===== Hero · 极光 + 大字 ===== */
.hero {
  position: relative; min-height: 100vh;
  background: var(--c-primary-deeper); color: var(--c-white);
  overflow: hidden; isolation: isolate;
}
.hero::before {
  content: ''; position: absolute; inset: -10% -10% -20% -10%; z-index: -2;
  background:
    radial-gradient(60% 50% at 18% 30%, var(--v3-aurora-2) 0%, transparent 65%),
    radial-gradient(50% 45% at 82% 20%, var(--v3-aurora-1) 0%, transparent 60%),
    radial-gradient(80% 60% at 50% 100%, var(--v3-aurora-3) 0%, transparent 70%),
    conic-gradient(from 200deg at 50% 50%, rgba(45,90,71,0.0), rgba(45,90,71,0.18), rgba(196,145,90,0.12), rgba(45,90,71,0.0));
  filter: blur(2px) saturate(1.1);
  animation: auroraDrift 24s var(--v3-ease-soft) infinite alternate;
}
@keyframes auroraDrift { 0% { transform: translate3d(0,0,0) scale(1); } 100% { transform: translate3d(-2%,2%,0) scale(1.05); } }
.hero::after {
  content: ''; position: absolute; inset: 0; z-index: -1;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 80px 80px;
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
          mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
}
.hero-stamp, .hero-coord {
  color: rgba(255,255,255,0.55);
  font-family: var(--font-mono); font-size: 10.5px;
  letter-spacing: 0.18em; text-transform: uppercase;
}
.hero-coord .axis { background: rgba(255,255,255,0.25); }
.hero-inner { max-width: 1100px; padding: 0 var(--s-5); }
.hero-title {
  font-size: var(--fs-display-xl);
  line-height: 1.02; letter-spacing: -0.03em; font-weight: 500;
  font-family: var(--font-display-zh); color: var(--c-white);
  margin: 0 0 28px; text-wrap: balance;
  /* v0.4 老年友好:系统字号放大 200% 时,中文不撑出容器 */
  overflow-wrap: break-word; word-break: break-word;
}
.hero-title em {
  font-style: normal; position: relative; display: inline-block;
  background: linear-gradient(180deg, #F3D9B3 0%, #E9C99A 60%, #C4915A 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  padding: 0 0.04em;
}
.hero-title em::after {
  content: ''; position: absolute; left: 4%; right: 4%; bottom: -0.12em;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(196,145,90,0.65), transparent);
}
/* v0.4 · Hero 主标题变体 ——「王谢堂前燕 / 飞入百姓家」
   衬线 + 暖白主文 + 琥珀斜杠分隔,呼应 .hero-title em 的描金 */
.hero-title--floral {
  font-family: "Fraunces", "Noto Serif SC", serif;
  font-weight: 500;
  font-style: normal;
  font-size: clamp(28px, 6.4vw, 56px);   /* v0.4 老年友好:mobile 上限 56 */
  line-height: 1.18;
  letter-spacing: 0.01em;
  color: #f3ead9;
  text-wrap: balance;
  display: flex;
  align-items: baseline;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.18em 0.36em;
  margin: 0 0 24px;
  max-width: 100%;
  padding: 0 var(--s-4);   /* v0.4 老年友好:左右留 padding,撑不出容器 */
}
.hero-title__sep {
  font-family: "Inter", "Noto Serif SC", sans-serif;
  font-style: normal;
  font-weight: 300;
  color: rgba(196,145,90,0.92);
  font-size: 0.62em;
  transform: translateY(-0.04em);
  flex: 0 0 auto;
  margin: 0 0.04em;
}
.hero-sub {
  color: rgba(255,255,255,0.78); font-size: 17px; line-height: 1.65;
  width: min(620px, calc(100vw - 24px)); margin: 0 auto 18px; font-weight: 400;
  overflow-wrap: break-word; word-break: break-word; text-wrap: pretty;
  padding: 0 12px;
  box-sizing: border-box;
}
/* v0.4 · Hero 醒目字 —— 取代 v0.3 旧的小印,作为副标题层级的品牌叙事钩子
   字号介于 .hero-sub 和 .hero-title 之间;serif 描金;斜杠分隔 */
/* v0.4 · .hero-ribbon 元素已废弃 —— 醒目字升级为 .hero-title--floral 主标题,见 152 行 */
.hero-actions { display: flex; gap: 14px; justify-content: center; margin-top: 44px; flex-wrap: wrap; }
.hero-actions .btn {
  height: 50px; padding: 0 28px; border-radius: 999px;
  font-size: 14px; letter-spacing: 0.04em; font-weight: 500;
  border: 1px solid transparent;
  transition: all var(--v3-dur-1) var(--v3-ease);
}
.hero-actions .btn-light { background: var(--c-white); color: var(--c-ink); border-color: var(--c-white); }
.hero-actions .btn-light:hover { background: var(--c-accent-soft); border-color: var(--c-accent-soft); transform: translateY(-2px); box-shadow: 0 12px 32px rgba(196,145,90,0.32); }
.hero-actions .btn-secondary { background: transparent; color: var(--c-white); border-color: rgba(255,255,255,0.28); }
.hero-actions .btn-secondary:hover { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.5); transform: translateY(-2px); }
.hero-mark { animation: heroMarkIn 1.6s var(--v3-ease) 0.1s both; }
.hero-title { animation: heroTitleIn 1.4s var(--v3-ease) 0.35s both; }
.hero-sub   { animation: heroSubIn   1.2s var(--v3-ease) 0.75s both; }
/* .hero-ribbon animation 已废弃 */
.hero-actions { animation: heroSubIn 1.2s var(--v3-ease) 1.1s both; }
.hero-stamp, .hero-coord { animation: heroSubIn 1.4s var(--v3-ease) 0.1s both; }
@keyframes heroMarkIn { from { opacity: 0; transform: translateY(-8px) scale(0.98); filter: blur(6px); } to { opacity: 1; transform: none; filter: none; } }
@keyframes heroTitleIn { from { opacity: 0; transform: translateY(24px); clip-path: inset(0 0 100% 0); } to { opacity: 1; transform: none; clip-path: inset(0 0 0 0); } }
@keyframes heroSubIn { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }

/* ===== 章节号 + 进度条 ===== */
.section-head {
  display: grid; grid-template-columns: 1fr auto 1fr;
  align-items: center; gap: 24px;
  padding: 0 0 32px;
  border-bottom: 1px solid var(--v3-line);
  margin-bottom: 56px; position: relative;
}
.section-head::after {
  content: ''; position: absolute; left: 0; bottom: -1px;
  width: var(--v3-progress, 14%); height: 2px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
  transition: width 0.6s var(--v3-ease);
}
.section-head__num {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--c-primary);
  position: relative; padding-left: 18px;
}
.section-head__num::before { width: 10px; height: 1px; background: var(--c-primary); opacity: 0.6; }
.section-head__eyebrow {
  font-family: var(--font-display-en); font-style: italic;
  font-size: 13px; color: var(--c-muted); letter-spacing: 0.04em;
  text-align: center; font-feature-settings: "ss01" 1, "salt" 1;
}
.section-head__page {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em;
  color: var(--c-muted-2); justify-self: end;
}
.section-head__page .dot {
  width: 5px; height: 5px; background: var(--c-accent);
  display: inline-block; border-radius: 50%;
  margin-right: 8px; vertical-align: middle;
  box-shadow: 0 0 0 4px rgba(196,145,90,0.18);
}

/* ===== Manifesto ===== */
.manifesto {
  padding: 140px 0 120px;
  background:
    radial-gradient(80% 60% at 50% 0%, rgba(232,240,236,0.45) 0%, transparent 70%),
    var(--c-surface);
}
.manifesto .eyebrow {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.32em;
  text-transform: uppercase; color: var(--c-muted-2);
  align-items: center; gap: 12px;
}
.manifesto .eyebrow::before { content: ''; width: 24px; height: 1px; background: var(--c-primary); display: inline-block; }
.manifesto h2 {
  font-family: var(--font-display-zh);
  font-size: clamp(34px, 4.6vw, 60px); line-height: 1.18;
  letter-spacing: -0.02em; font-weight: 500; color: var(--c-ink);
  margin-top: 36px; text-wrap: balance;
}
.manifesto h2 em {
  color: var(--c-primary); font-style: normal;
  font-family: var(--font-display-en); font-weight: 400; font-style: italic;
  font-feature-settings: "ss01" 1, "salt" 1;
}
.manifesto .manifesto-foot {
  margin-top: 56px; color: var(--c-muted);
  font-size: 13px; letter-spacing: 0.16em; text-transform: uppercase;
}
.manifesto .manifesto-foot::before { background: linear-gradient(90deg, var(--c-primary), transparent); width: 32px; }
.manifesto .manifesto-foot::after { display: none; }

/* ===== Products · 玻璃卡 ===== */
.products { padding: 120px 0; background: var(--c-secondary); position: relative; }
.products::before {
  content: ''; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(45,90,71,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45,90,71,0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse at center, #000, transparent 80%);
          mask-image: radial-gradient(ellipse at center, #000, transparent 80%);
  pointer-events: none;
}
.products .products-head h2 {
  font-family: var(--font-display-zh);
  font-size: clamp(28px, 3.8vw, 48px); line-height: 1.18;
  letter-spacing: -0.018em; font-weight: 500; color: var(--c-ink);
  text-wrap: balance;
}
.products .products-head h2 em {
  font-family: var(--font-display-en); font-style: italic; font-weight: 400;
  position: relative; padding: 0 0.1em;
  background: linear-gradient(180deg, transparent 70%, rgba(196,145,90,0.22) 70%);
}
.products .products-head p { color: var(--c-muted); font-size: 15px; line-height: 1.7; }

.product-card {
  /* 去掉 backdrop-filter:和 transform: translateY(-6px) 一起触发重合成,
     会把卡片内容(图片+文字)一起模糊。改用半透明实色 + 渐变叠加保留磨砂感。 */
  background: rgba(253,252,250,0.94);
  border: 1px solid rgba(26,26,26,0.06);
  border-radius: 22px; padding: 24px;
  box-shadow: var(--v3-shadow-md);
  transition: transform var(--v3-dur-1) var(--v3-ease),
              box-shadow var(--v3-dur-1) var(--v3-ease),
              border-color var(--v3-dur-1) var(--v3-ease);
  position: relative; overflow: hidden;
}
/* v0.2 · 移除了原 ::before 渐变叠加层:hover 时 opacity 0→1 会触发整张卡片重合成,
   导致图片和文字一起模糊。改用 box-shadow + border-color 做 hover 反馈。
   用 .is-in:hover 提高特异性,避免被 [data-reveal].is-in { transform:none } 覆盖。 */
.product-card.is-in:hover {
  transform: translateY(-6px); box-shadow: var(--v3-shadow-lg);
  border-color: rgba(45,90,71,0.18);
}
.product-card .ph {
  border-radius: 14px; overflow: hidden;
  box-shadow: 0 14px 36px rgba(26,26,26,0.10);
}
/* v0.3 · 产品图悬停动效 —— 不缩放图片(scale 触发 GPU 重采样会糊),
   改成:1) 整张图水平轻微平移(2D 位移不重采样)  2) 用 ::after 伪元素做光泽扫过
   3) 轻微提亮。零图片重采样,产品永远清晰。 */
.product-card .ph > img {
  transition: transform 1.2s var(--v3-ease-soft), filter 0.6s var(--v3-ease);
  transform-origin: center center;
  will-change: transform;
}
.product-card.is-in:hover .ph > img {
  /* 2D 平移,translateX 不触发图片重采样 —— 产品始终清晰 */
  transform: translateX(10px) scale(1.0001);
  filter: brightness(1.04) saturate(1.05);
}
/* 光泽扫过层 —— 伪元素覆盖在图片上,白色斜向渐变从左滑到右 */
.product-card .ph { position: relative; }
.product-card .ph::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(115deg,
    transparent 30%,
    rgba(255,255,255,0.45) 48%,
    rgba(255,255,255,0.65) 50%,
    rgba(255,255,255,0.45) 52%,
    transparent 70%);
  transform: translateX(-120%);
  transition: none;
  pointer-events: none;
  mix-blend-mode: screen;
}
.product-card.is-in:hover .ph::after {
  animation: shineSweep 1.4s var(--v3-ease-soft) forwards;
}
@keyframes shineSweep {
  0%   { transform: translateX(-120%); }
  100% { transform: translateX(120%); }
}
.product-card .meta { padding: 8px 4px 0; }
.product-card .tag {
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--c-primary);
  background: var(--c-primary-soft); border: 1px solid rgba(45,90,71,0.18);
  padding: 4px 10px; border-radius: 999px;
}
.product-card h3.name {
  font-family: var(--font-display-zh); font-size: 26px; letter-spacing: -0.01em;
  color: var(--c-ink); font-weight: 500;
}
.product-card .tag-line { color: var(--c-muted); font-size: 14px; line-height: 1.7; }
.product-card .price {
  font-family: var(--font-display-en);
  font-feature-settings: "tnum" 1, "lnum" 1, "ss01" 1;
  font-size: 28px; font-weight: 500; color: var(--c-ink);
  letter-spacing: -0.01em;
}
.product-card .price .unit { font-size: 13px; color: var(--c-muted); font-weight: 400; }
.product-card .arrow-link {
  color: var(--c-primary); font-weight: 500; position: relative; font-size: 14px;
}
.product-card .arrow-link::after { content: ' →'; display: inline-block; margin-left: 4px; transition: transform var(--v3-dur-1) var(--v3-ease); }
.product-card:hover .arrow-link::after { transform: translateX(6px); }

/* ===== Method ===== */
.method { padding: 140px 0; background: var(--c-surface); }
.method-grid { display: grid; grid-template-columns: 260px 1fr; gap: 80px; align-items: start; }
.method-toc {
  position: sticky; top: calc(var(--nav-h) + 56px);
  padding: 24px 0; border-left: 1px solid var(--v3-line); padding-left: 24px;
}
.method-toc .label {
  display: flex; justify-content: space-between;
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--c-muted-2); margin-bottom: 18px;
}
.method-toc ol { list-style: none; padding: 0; margin: 0; counter-reset: toc; }
.method-toc li { counter-increment: toc; margin: 14px 0; }
.method-toc li::before {
  content: counter(toc, decimal-leading-zero);
  font-family: var(--font-mono); font-size: 11px;
  color: var(--c-muted-2); margin-right: 14px; letter-spacing: 0.08em;
}
.method-toc li a {
  color: var(--c-ink-soft); font-size: 15px; font-weight: 500;
  border-bottom: 1px solid transparent; padding-bottom: 2px;
  transition: color var(--dur-base) var(--ease-std), border-color var(--dur-base) var(--ease-std);
}
.method-toc li a:hover { color: var(--c-primary); border-bottom-color: var(--c-primary); }

.method-body h2 {
  font-family: var(--font-display-zh);
  font-size: clamp(28px, 3.6vw, 44px); line-height: 1.2;
  letter-spacing: -0.018em; font-weight: 500; color: var(--c-ink);
}
.method-body h2 em { font-style: normal; color: var(--c-primary); }
.method-body h3 {
  font-family: var(--font-display-zh); font-size: 22px; font-weight: 500;
  color: var(--c-ink); margin: 64px 0 16px;
  position: relative; padding-left: 0;
}
.method-body h3 .h3-num {
  display: inline-block;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.18em;
  color: var(--c-accent); background: var(--c-accent-soft);
  padding: 4px 8px; border-radius: 4px; font-weight: 500;
  margin-right: 12px; vertical-align: middle;
}
.method-body h3 span.small {
  display: inline-block; margin-left: 12px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em;
  color: var(--c-muted-2); text-transform: uppercase; font-weight: 400;
}
.method-body p { font-size: 15.5px; line-height: 1.85; color: var(--c-ink-soft); }
.method-body p strong { color: var(--c-ink); font-weight: 600; }
.data-row {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 0;
  border-top: 1px solid var(--v3-line); border-bottom: 1px solid var(--v3-line);
  margin: 40px 0; padding: 32px 0;
}
.data-row .cell { padding: 0 24px; border-left: 1px solid var(--v3-line-soft); }
.data-row .cell:first-child { border-left: none; padding-left: 0; }
.data-row .cell .n {
  font-family: var(--font-display-en); font-style: italic;
  font-feature-settings: "tnum" 1, "lnum" 1, "ss01" 1;
  font-size: 44px; font-weight: 400; color: var(--c-primary);
  letter-spacing: -0.02em; line-height: 1; display: block;
}
.data-row .cell .l {
  display: block; font-size: 12px; letter-spacing: 0.12em;
  color: var(--c-muted); margin-top: 10px; text-transform: uppercase;
  font-family: var(--font-mono);
}

/* ===== FMD · 3 步流程 ===== */
.fmd { padding: 140px 0; background: linear-gradient(180deg, var(--c-surface) 0%, var(--c-secondary) 100%); }
.fmd-head h2 {
  font-family: var(--font-display-zh);
  font-size: clamp(28px, 3.8vw, 48px); line-height: 1.18;
  letter-spacing: -0.018em; font-weight: 500; color: var(--c-ink);
}
.fmd-head h2 em { font-family: var(--font-display-en); font-style: italic; font-weight: 400; color: var(--c-accent); }
.fmd-head p { font-size: 15.5px; line-height: 1.85; color: var(--c-ink-soft); }

.key-takeaways {
  margin: 56px 0; padding: 40px 44px;
  background: rgba(232,240,236,0.5);
  border: 1px solid rgba(45,90,71,0.12);
  border-radius: 18px; position: relative;
  backdrop-filter: var(--v3-blur); -webkit-backdrop-filter: var(--v3-blur);
}
.key-takeaways::before {
  content: ''; position: absolute; left: 0; top: 24px; bottom: 24px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-primary), var(--c-accent));
  border-radius: 2px;
}
.key-takeaways .kt-label {
  display: inline-block;
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--c-primary);
  margin-bottom: 20px; padding: 4px 10px;
  background: var(--c-white); border-radius: 999px;
  border: 1px solid rgba(45,90,71,0.12);
}
.key-takeaways ul { list-style: none; padding: 0; margin: 0; }
.key-takeaways li {
  position: relative; padding: 12px 0 12px 36px;
  font-size: 15px; line-height: 1.75; color: var(--c-ink-soft);
  border-bottom: 1px solid var(--v3-line-soft);
}
.key-takeaways li:last-child { border-bottom: none; padding-bottom: 0; }
.key-takeaways li::before {
  content: '◆'; position: absolute; left: 4px; top: 14px;
  color: var(--c-primary); font-size: 8px; opacity: 0.6;
}

.fmd-steps {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 0;
  margin: 80px 0 56px;
  border-top: 1px solid var(--v3-line); border-bottom: 1px solid var(--v3-line);
}
.fmd-steps li {
  position: relative; padding: 40px 28px 40px 28px;
}
.fmd-steps li + li { border-left: 1px solid var(--v3-line-soft); }
/* v0.4 · fmd-steps · 章号排版升级
   - .num: 大号镂空斜体,右下角配 " / 03 " 小印章式角标
   - .num 下方 24px 琥珀短横线,作为与 h3 的视觉分隔
   - h3 与 .small 在同一行,small 用 mono 小标、灰色、letter-spacing
   - p 行高 1.85、段间 8px;关键短语 <em> 用 serif 斜体琥珀色 */
.fmd-steps .num {
  font-family: var(--font-display-en); font-style: italic;
  font-feature-settings: "tnum" 1, "ss01" 1;
  font-size: 56px; font-weight: 400;
  color: transparent; -webkit-text-stroke: 1px var(--c-primary);
  line-height: 1; display: block; margin-bottom: 14px; letter-spacing: -0.02em;
}
/* 章号下 24px 琥珀短横线,作为视觉分隔 */
.fmd-steps li::before {
  content: '';
  display: block;
  width: 28px; height: 1px;
  background: var(--c-accent);
  margin: 0 0 16px;
}
.fmd-steps h3 {
  font-family: var(--font-display-zh); font-size: 20px; font-weight: 600;
  color: var(--c-ink); display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap;
  letter-spacing: 0.01em;
  line-height: 1.35;
}
.fmd-steps h3 .small {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em;
  color: var(--c-muted-2); text-transform: uppercase; font-weight: 400;
  align-self: baseline; transform: translateY(-1px);
}

/* v0.4 · .fmd-step(index.html 的 div 变体)—— 卡片化排版
   - 章号(03/07/15 大斜体琥珀色描边) + 标题 + 元数据小字 + 描述
   - 卡片分隔用 hairline + 底部 24px 琥珀短横线作为锚 */
.fmd-steps .fmd-step {
  position: relative; padding: 36px 28px 28px;
  display: flex; flex-direction: column; gap: 12px;
}
.fmd-steps .fmd-step + .fmd-step { border-left: 1px solid var(--v3-line-soft); }
/* 章号:03 / 07 / 15 —— 大斜体琥珀描边,作为视觉锚 */
.fmd-steps .fmd-step__num {
  font-family: var(--font-display-en);
  font-style: italic; font-weight: 400;
  font-size: 44px; line-height: 1;
  color: transparent; -webkit-text-stroke: 1px var(--c-accent);
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}
/* 标题 h4 */
.fmd-steps .fmd-step h4 {
  font-family: var(--font-display-zh);
  font-size: 20px; font-weight: 600;
  color: var(--c-ink);
  letter-spacing: 0.01em; line-height: 1.35;
  margin: 0;
  display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap;
}
/* 标题旁的 meta 小字(总价/折扣) */
.fmd-steps .fmd-step__meta {
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.14em;
  color: var(--c-muted-2); text-transform: uppercase;
  font-weight: 400;
}
/* 描述段 */
.fmd-steps .fmd-step p {
  font-size: 14.5px; line-height: 1.92; color: var(--c-ink-soft);
  text-wrap: pretty;
  word-spacing: 0.02em;
  margin: 0;
}
/* 描述段里加粗的关键数字 */
.fmd-steps .fmd-step p strong {
  color: var(--c-primary);
  font-weight: 600;
  font-family: var(--font-display-en);
  font-feature-settings: "tnum" 1;
  padding: 0 0.06em;
}
/* 底部琥珀短横线 —— 卡片视觉锚 */
.fmd-steps .fmd-step::after {
  content: '';
  display: block;
  width: 28px; height: 1px;
  background: var(--c-accent);
  margin-top: 8px;
}
/* mobile: 取消分隔线 */
@media (max-width: 880px) {
  .fmd-steps .fmd-step + .fmd-step { border-left: 0; border-top: 1px solid var(--v3-line-soft); }
  .fmd-steps .fmd-step__num { font-size: 36px; }
}
.fmd-steps p {
  font-size: 14.5px; line-height: 1.95; color: var(--c-ink-soft);
  margin-top: 14px;
  text-wrap: pretty;
  word-spacing: 0.02em;
}
.fmd-steps p em {
  font-family: "Fraunces", "Noto Serif SC", serif;
  font-style: italic; font-weight: 500;
  color: var(--c-accent);
  padding: 0 0.04em;
  letter-spacing: 0.01em;
}

/* v0.4 · .methods-table__head —— 双行标题
   - 主标题:大号衬线 600,与全站 H2 节奏一致
   - 副标题:衬线斜体(Fraunces),琥珀色,作为视觉锚
   - 副标题前 28px 琥珀短横线,与下方卡片保持一致 */
.methods-table__head {
  margin: 40px 0 28px;
  text-align: center;
}
.methods-table__title {
  font-family: var(--font-display-zh);
  font-size: clamp(28px, 3.2vw, 38px);
  font-weight: 600;
  letter-spacing: -0.005em;
  line-height: 1.25;
  color: var(--c-ink);
  margin: 0 0 12px;
  text-wrap: balance;
}
.methods-table__subtitle {
  font-family: var(--font-display-en);
  font-size: clamp(16px, 1.6vw, 19px);
  font-style: italic;
  font-weight: 400;
  color: var(--c-muted);
  letter-spacing: 0.02em;
  margin: 0;
}
.methods-table__subtitle em {
  color: var(--c-accent);
  font-style: italic;
  font-weight: 500;
  position: relative;
  padding-left: 36px;
}
.methods-table__subtitle em::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 28px; height: 1px;
  background: var(--c-accent);
}

/* v0.4 · .methods-table —— 谷蔬粉 5 种核心饮食方法对比表
   - 用 table 语义 + 编辑杂志感的视觉(白底 hairline + 琥珀微章 + 衬线 italic)
   - 第一列方案名用深绿底白字(与截图的视觉锚一致)+ 衬线斜体
   - 优点/缺点列用符号+色块:绿勾/琥珀叹号(克制,不是大色块) */
.methods-table-wrap {
  margin: 64px 0 32px;
}
.methods-table-hint {
  display: none;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--c-muted-2);
  text-transform: uppercase;
  padding: 0 0 10px;
}
.methods-table {
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--v3-line-soft) transparent;
}
.methods-table::-webkit-scrollbar { height: 6px; }
.methods-table::-webkit-scrollbar-track { background: transparent; }
.methods-table::-webkit-scrollbar-thumb { background: var(--v3-line-soft); border-radius: 999px; }
.methods-table__grid {
  width: 100%;
  min-width: 880px;   /* v0.4 老年友好:5 列保证不被挤压 */
  border-collapse: collapse;
  font-family: var(--font-body-zh);
  font-size: 14.5px; line-height: 1.7;
  color: var(--c-ink);
  background: var(--c-surface);
  border-top: 1px solid var(--v3-line);
  border-bottom: 1px solid var(--v3-line);
}
.methods-table__grid thead th {
  font-family: var(--font-display-zh);
  font-weight: 600; font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--c-ink);
  text-align: left; vertical-align: bottom;
  padding: 18px 16px 14px;
  border-bottom: 1px solid var(--v3-line);
  background: var(--c-secondary);
}
.methods-table__grid tbody tr {
  transition: background var(--dur-base) var(--ease-out);
}
.methods-table__grid tbody tr:hover { background: var(--c-secondary); }

@media (max-width: 880px) {
  .methods-table-hint { display: block; }
}
.methods-table__grid tbody tr + tr th,
.methods-table__grid tbody tr + tr td {
  border-top: 1px solid var(--v3-line-soft);
}
/* 第一列:方案名(深绿底白字 + 衬线斜体) */
.methods-table__grid tbody th[scope="row"] {
  font-family: var(--font-display-zh);
  font-weight: 600; font-size: 18px;
  color: #fff; background: var(--c-primary);
  text-align: center; vertical-align: middle;
  padding: 22px 14px;
  letter-spacing: 0.02em;
  white-space: nowrap;
  min-width: 110px;
}
/* 普通数据格 */
.methods-table__grid tbody td {
  padding: 18px 16px;
  vertical-align: top;
  color: var(--c-ink-soft);
  font-size: 14px; line-height: 1.7;
  text-wrap: pretty;
}
/* 优点/缺点前缀符号 */
.methods-table__grid .cell-pro::before {
  content: "✓ "; color: var(--c-primary); font-weight: 700; font-family: var(--font-mono);
}
.methods-table__grid .cell-con::before {
  content: "△ "; color: var(--c-accent); font-weight: 700; font-family: var(--font-mono);
}
/* 表格下方 PS 注释 */
.methods-table__note {
  margin-top: 18px;
  font-family: var(--font-body-zh);
  font-size: 13px; color: var(--c-muted-2);
  letter-spacing: 0.02em;
  text-align: center;
  font-style: italic;
}
.methods-table__note::before { content: "— "; color: var(--c-accent); }

/* mobile:水平滚动保留,但缩小字号 + 减少 padding */
@media (max-width: 880px) {
  .methods-table__grid { font-size: 13px; }
  .methods-table__grid thead th { font-size: 12px; padding: 14px 10px 10px; }
  .methods-table__grid tbody th[scope="row"] { font-size: 15px; padding: 16px 10px; min-width: 88px; }
  .methods-table__grid tbody td { padding: 14px 10px; }
}
.fmd-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.fmd-actions .btn {
  height: 50px; padding: 0 28px; border-radius: 999px;
  font-size: 14px; letter-spacing: 0.02em; font-weight: 500;
}
.fmd-actions .btn-primary { background: var(--c-ink); border-color: var(--c-ink); }
.fmd-actions .btn-primary:hover { background: var(--c-primary); border-color: var(--c-primary); transform: translateY(-2px); }
.fmd-actions .btn-secondary { background: transparent; color: var(--c-ink); border-color: var(--c-ink); }
.fmd-actions .btn-secondary:hover { background: var(--c-ink); color: var(--c-white); transform: translateY(-2px); }

/* ===== Trust strip ===== */
.trust-strip {
  padding: 96px 0; background: var(--c-primary); color: var(--c-white);
  position: relative; overflow: hidden;
}
.trust-strip::before {
  content: ''; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
          mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
  pointer-events: none;
}
.trust-grid {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: 0;
  border-top: 1px solid rgba(255,255,255,0.16);
  border-bottom: 1px solid rgba(255,255,255,0.16);
  position: relative; z-index: 1;
}
.trust-cell {
  padding: 36px 16px; border-right: 1px solid rgba(255,255,255,0.08);
  text-align: center; transition: background var(--v3-dur-1) var(--v3-ease);
}
.trust-cell:hover { background: rgba(255,255,255,0.04); }
.trust-cell:last-child { border-right: none; }
.trust-cell .n {
  display: block;
  font-family: var(--font-display-en); font-style: italic;
  font-feature-settings: "tnum" 1, "lnum" 1, "ss01" 1;
  font-size: clamp(32px, 3.2vw, 44px); color: var(--c-accent-soft);
  letter-spacing: -0.02em; font-weight: 400; line-height: 1.05;
}
.trust-cell .l {
  display: block; font-size: 12px; letter-spacing: 0.14em;
  color: rgba(255,255,255,0.6); margin-top: 10px;
  font-family: var(--font-mono); text-transform: uppercase;
}

/* ===== Pull quote ===== */
.pull-quote {
  padding: 160px 0; background: var(--c-surface);
  position: relative; overflow: hidden;
}
.pull-quote::before {
  content: '“'; position: absolute; left: 50%; top: 50%;
  transform: translate(-50%, -55%);
  font-family: var(--font-display-en);
  font-size: clamp(280px, 36vw, 480px);
  line-height: 0.7; color: var(--c-primary); opacity: 0.045;
  font-style: italic; pointer-events: none; z-index: 0;
}
.pull-quote__inner { position: relative; z-index: 1; text-align: center; max-width: 880px; margin: 0 auto; }
.pull-quote__mark { display: none; }
.pull-quote__text {
  font-family: var(--font-display-zh);
  font-size: clamp(28px, 3.8vw, 48px); line-height: 1.32;
  letter-spacing: -0.015em; font-weight: 500; color: var(--c-ink);
  text-wrap: balance;
}
.pull-quote__text em {
  font-family: var(--font-display-en); font-style: italic; font-weight: 400;
  color: var(--c-primary); position: relative;
  background: linear-gradient(180deg, transparent 78%, rgba(45,90,71,0.18) 78%);
  padding: 0 0.1em;
}
.pull-quote__cite {
  display: inline-flex; flex-direction: column; align-items: center; gap: 6px;
  margin-top: 56px; padding-top: 32px;
  border-top: 1px solid var(--v3-line); position: relative;
}
.pull-quote__cite strong {
  font-family: var(--font-display-zh); font-size: 15px; font-weight: 500;
  color: var(--c-ink); letter-spacing: 0.04em;
}
.pull-quote__cite span {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.18em;
  color: var(--c-muted-2); text-transform: uppercase;
}

/* ===== Ingredients ===== */
.ingredients {
  position: relative; min-height: 90vh; background: var(--c-ink);
  display: flex; align-items: center; justify-content: center; overflow: hidden;
}
.ig-head {
  position: absolute; top: 56px; left: 0; right: 0; z-index: 2;
  display: flex; justify-content: space-between; align-items: center;
  padding: 0 64px; color: rgba(255,255,255,0.7);
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.18em; text-transform: uppercase;
}
.ig-num { color: var(--c-accent-soft); }
.ig-photo { position: absolute; inset: 0; }
.ig-photo img {
  filter: brightness(0.78) saturate(1.05);
  transition: transform 12s var(--v3-ease-soft), filter var(--v3-dur-3) var(--v3-ease);
  will-change: transform;
}
.ingredients:hover .ig-photo img { transform: scale(1.04); filter: brightness(0.92) saturate(1.1); }
.ig-caption {
  position: relative; z-index: 2; text-align: center; color: var(--c-white);
  max-width: 720px;
  background: rgba(26,26,26,0.32);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 22px;
  padding: 56px 48px;
  box-shadow: 0 32px 80px rgba(0,0,0,0.4);
}
.ig-caption .eyebrow {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.32em;
  text-transform: uppercase; color: var(--c-accent-soft);
  display: inline-block; margin-bottom: 20px;
}
.ig-caption p {
  font-family: var(--font-display-zh);
  font-size: clamp(24px, 2.8vw, 36px); line-height: 1.35;
  font-weight: 500; color: var(--c-white); letter-spacing: -0.012em;
}
.ig-caption em {
  font-family: var(--font-display-en); font-style: italic;
  color: var(--c-accent-soft); font-weight: 400;
}

/* ===== Contact CTA ===== */
.contact-cta {
  position: relative; padding: 160px 0;
  background: var(--c-primary-deeper); color: var(--c-white);
  overflow: hidden; isolation: isolate;
}
.contact-cta::before {
  content: ''; position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(50% 60% at 50% 50%, rgba(196,145,90,0.16) 0%, transparent 70%),
    conic-gradient(from 90deg at 50% 50%, rgba(45,90,71,0.5), rgba(29,51,41,0.5), rgba(45,90,71,0.5));
}
.contact-cta::after {
  content: ''; position: absolute; inset: 0; z-index: -1;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(ellipse at center, #000 20%, transparent 70%);
          mask-image: radial-gradient(ellipse at center, #000 20%, transparent 70%);
}
.contact-cta .eyebrow {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.32em;
  text-transform: uppercase; color: var(--c-accent-soft);
  display: inline-block; padding: 6px 14px;
  border: 1px solid rgba(196,145,90,0.3); border-radius: 999px;
}
.contact-cta h2 {
  font-family: var(--font-display-zh);
  font-size: clamp(36px, 5vw, 64px); line-height: 1.16;
  letter-spacing: -0.022em; font-weight: 500; color: var(--c-white);
  margin-top: 28px; text-wrap: balance;
}
.contact-cta h2 em {
  font-family: var(--font-display-en); font-style: italic;
  color: var(--c-accent-soft); font-weight: 400;
}
.contact-cta p { color: rgba(255,255,255,0.72); font-size: 16px; line-height: 1.8; }
.contact-cta .actions { margin-top: 48px; display: flex; gap: 14px; flex-wrap: wrap; }
.contact-cta .actions .btn {
  height: 54px; padding: 0 32px; border-radius: 999px;
  font-size: 14.5px; letter-spacing: 0.02em; font-weight: 500;
  border: 1px solid transparent;
}
.contact-cta .btn-light { background: var(--c-white); color: var(--c-ink); }
.contact-cta .btn-light:hover { background: var(--c-accent-soft); transform: translateY(-2px); box-shadow: 0 14px 36px rgba(196,145,90,0.32); }
.contact-cta .btn-secondary { color: var(--c-white); border-color: rgba(255,255,255,0.32); background: transparent; }
.contact-cta .btn-secondary:hover { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.55); transform: translateY(-2px); }
.contact-cta .wx-hint {
  margin-top: 28px; font-family: var(--font-mono);
  font-size: 12px; letter-spacing: 0.16em;
  color: rgba(255,255,255,0.5); text-transform: uppercase;
}

/* ===== Footer ===== */
.footer {
  padding: 96px 0 32px; background: #131313; color: rgba(255,255,255,0.7);
  position: relative;
}
.footer::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(196,145,90,0.4), transparent);
}
.footer .brand {
  font-family: var(--font-display-zh); font-size: 22px; font-weight: 500;
  color: var(--c-white); letter-spacing: 0.04em;
}
.footer .brand span {
  font-family: var(--font-display-en); font-style: italic;
  color: var(--c-accent-soft); margin-left: 8px; font-weight: 400;
}
.footer .tag {
  display: inline-block; margin-top: 12px;
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.22em;
  color: var(--c-accent-soft); text-transform: uppercase;
  padding: 4px 10px; border: 1px solid rgba(196,145,90,0.3); border-radius: 999px;
}
.footer h4 {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.24em;
  text-transform: uppercase; color: rgba(255,255,255,0.5);
  margin-bottom: 16px; font-weight: 500;
}
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { padding: 4px 0; }
.footer a {
  color: rgba(255,255,255,0.78); font-size: 14px;
  transition: color var(--dur-base) var(--ease-std); position: relative;
}
.footer a:hover { color: var(--c-accent-soft); }
.footer-grid {
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 48px; padding-bottom: 56px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-colophon {
  display: flex; flex-wrap: wrap; gap: 40px;
  padding: 32px 0; border-bottom: 1px solid rgba(255,255,255,0.06);
}
.footer-colophon .item { display: flex; flex-direction: column; gap: 4px; }
.footer-colophon .k {
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.22em;
  color: rgba(255,255,255,0.4); text-transform: uppercase;
}
.footer-colophon .v {
  font-family: var(--font-display-en); font-style: italic;
  font-size: 14px; color: rgba(255,255,255,0.85);
}
.footer .legal {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 24px; font-size: 12px; color: rgba(255,255,255,0.45);
}
.footer .icp-link { color: rgba(255,255,255,0.45); }
.footer .icp-link:hover { color: var(--c-accent-soft); }

/* ===== Reveal 增强 ===== */
[data-reveal] {
  opacity: 0; transform: translateY(28px);
  transition: opacity 1.2s var(--v3-ease), transform 1.2s var(--v3-ease);
}
[data-reveal].is-in { opacity: 1; transform: none; }
[data-reveal][data-delay="1"] { transition-delay: 0.1s; }
[data-reveal][data-delay="2"] { transition-delay: 0.2s; }
[data-reveal][data-delay="3"] { transition-delay: 0.3s; }

/* ===== 响应式 ===== */
@media (max-width: 1100px) {
  .trust-grid { grid-template-columns: repeat(3, 1fr); }
  .trust-cell:nth-child(4) { border-right: none; }
  .fmd-steps { grid-template-columns: 1fr; }
  .fmd-steps li { border-right: none; border-left: none !important; border-bottom: 1px solid var(--v3-line-soft); padding: 32px 28px; }
  .fmd-steps li:last-child { border-bottom: none; }
  .method-grid { grid-template-columns: 1fr; gap: 32px; }
  .method-toc { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  /* ===== Hero ===== */
  .hero { min-height: 100svh; padding: 0 var(--s-4); overflow: hidden; }
  .hero-inner { padding: 0; max-width: 100%; }
  .hero-title { font-size: clamp(30px, 9vw, 44px); line-height: 1.12; letter-spacing: -0.02em; margin-bottom: 18px; }
  .hero-title--floral { font-size: clamp(30px, 8vw, 44px); line-height: 1.28; gap: 0.14em 0.22em; margin-bottom: 14px; }
  .hero-title__sep { font-size: 0.55em; }
  .hero-mark { width: 80px !important; height: 80px !important; }
  .hero-sub { font-size: 15px; line-height: 1.6; max-width: 100%; }
/* mobile · .hero-ribbon 已废弃(醒目字用 .hero-title--floral) */
  .hero-actions { gap: 10px; margin-top: 28px; }
  .hero-actions .btn { height: 44px; padding: 0 22px; font-size: 13px; }
  .hero-coord { font-size: 10px; padding: 0 16px; }
  .hero-coord .axis { width: 16px; }
  /* ===== Nav ===== */
  .nav { padding: 0 var(--s-4); height: 56px; gap: 8px; }
  .nav-brand { font-size: 12px; line-height: 1.15; white-space: nowrap; flex-shrink: 0; }
  .nav-links { display: none; }
  .nav-issue { font-size: 10px; padding: 2px 6px; }
  .nav-cta { display: none; }
  .nav-toggle { display: flex; }

  /* ===== Section head ===== */
  .section-head { padding: 0 var(--s-4); flex-wrap: wrap; gap: 8px 16px; }
  .section-head__num { font-size: 12px; }
  .section-head__eyebrow { font-size: 12px; flex: 1 1 100%; order: 3; text-align: left; }
  .section-head__page { font-size: 12px; }
  .section-head__num::before { width: 18px; margin-right: 8px; }

  /* ===== Manifesto ===== */
  .manifesto { padding: 56px 0 48px; }
  .manifesto .container-narrow { padding: 0 20px; }
  .manifesto h2 { font-size: clamp(22px, 7vw, 32px); line-height: 1.55; letter-spacing: -0.01em; text-wrap: balance; }
  .manifesto h2 em { font-size: 1.05em; }
  .manifesto-foot { margin-top: 28px; font-size: 11px; }
  /* nobreak span 在小屏改用 inline-block:浏览器优先在标点"之后"换行,
     避免标点单独甩到下一行行首 */
  .manifesto h2 .nobreak { display: inline-block; }

  /* ===== Products ===== */
  .products { padding: 56px 0; }
  .products .container { padding: 0 var(--s-4); }
  .products-head { grid-template-columns: 1fr; gap: 16px; margin-bottom: 32px; }
  .products-head h2 { font-size: clamp(26px, 7.5vw, 38px); line-height: 1.35; }
  .products-head p { font-size: 14px; }
  .product-grid { gap: 24px; }
  .product-card { padding: 16px; border-radius: 16px; }
  .product-card .meta { padding: 16px 4px 0; gap: 12px; }
  .product-card .meta h3 { font-size: 20px; }
  .product-card .meta .tag-line { font-size: 13px; }
  .product-card .meta .row { flex-wrap: wrap; gap: 12px; padding-top: 12px; margin-top: 12px; }

  /* ===== Method ===== */
  .method { padding: 56px 0; }
  .method .container { padding: 0 var(--s-4); }
  .method-grid { grid-template-columns: 1fr; gap: 24px; }
  .method-body h2, .method-body h3 { font-size: clamp(24px, 7vw, 32px); }
  .method-body p, .method-body li { font-size: 14px; line-height: 1.75; }
  .method-toc { padding: 0; position: static; }
  .method-toc .toc-list { flex-direction: row; flex-wrap: wrap; gap: 8px; }
  .method-toc .toc-list li { border-bottom: none; padding: 6px 10px; background: var(--c-secondary); border-radius: 4px; }

  /* ===== FMD section ===== */
  .fmd-section { padding: 56px 0; }
  .fmd-section .container { padding: 0 var(--s-4); }
  .fmd-head h2 { font-size: clamp(24px, 7vw, 32px); }
  .fmd-body { font-size: 14px; }
  .fmd-steps { padding: 0; }
  .fmd-steps li { padding: 24px 20px; }
  .fmd-steps li .step-num { font-size: 11px; }
  .fmd-steps li h3 { font-size: 18px; }
  .fmd-steps li p { font-size: 13px; }

  /* ===== Trust ===== */
  .trust { padding: 56px 0; }
  .trust .container { padding: 0 var(--s-4); }
  .trust-grid { grid-template-columns: repeat(2, 1fr); gap: 0; }
  .trust-cell { border-bottom: 1px solid rgba(255,255,255,0.08); }
  .trust-cell:nth-child(odd) { border-right: 1px solid rgba(255,255,255,0.08); }
  .trust-cell:nth-child(even) { border-right: none; }
  .trust-cell .n { font-size: 32px; }
  .trust-cell .l { font-size: 11px; }

  /* ===== Founder ===== */
  .founder { padding: 56px 0; }
  .founder .container { padding: 0 var(--s-4); }
  .founder-grid { grid-template-columns: 1fr; gap: 32px; }
  .founder-photo { aspect-ratio: 3/4; }

  /* ===== Ingredients ===== */
  .ingredients { padding: 56px 0; }
  .ingredients .container { padding: 0 var(--s-4); }
  .ig-head { padding: 0 24px; font-size: 10px; }
  .ig-caption { padding: 32px 24px; }

  /* ===== Page hero (about/method/products) ===== */
  .page-hero { padding: 80px 0 40px; }
  .page-hero .container { padding: 0 var(--s-4); }
  .page-hero h1 { font-size: clamp(32px, 9vw, 48px); }
  .page-hero .lede { font-size: 15px; }

  /* ===== Article body ===== */
  .article { padding: 40px 0; }
  .article .container { padding: 0 var(--s-4); }
  .article h2 { font-size: clamp(22px, 6vw, 28px); }
  .article p, .article li { font-size: 15px; line-height: 1.85; }
  .article blockquote { padding: 16px 20px; margin: 24px 0; font-size: 15px; }

  /* ===== Tables / data rows ===== */
  .data-row { grid-template-columns: 1fr; }
  .data-row .cell { border-left: none; border-top: 1px solid var(--v3-line-soft); padding: 16px 0; }
  .data-row .cell:first-child { border-top: none; padding-top: 0; }

  /* ===== Footer ===== */
  .footer { padding: 48px 0 24px; }
  .footer .container { padding: 0 var(--s-4); }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-colophon { gap: 24px; flex-direction: column; align-items: flex-start; }
  .footer .legal { flex-direction: column; gap: 8px; align-items: flex-start; font-size: 12px; }
}

/* ===== Hero mark visibility override (inline data-breath is opacity:0.4) ===== */
.hero-mark[data-breath],
.hero-mark[data-breath].is-breathing {
  opacity: 1;
  animation: heroMarkIn 1.6s var(--v3-ease) 0.1s both;
}

/* ===== Hero mark: 深绿底 + 琥珀字 wordmark plate(替换 2-up 对比图) ===== */
.hero-mark {
  width: 132px; height: auto;
  margin: 0 auto var(--s-7);
  filter: none;             /* 已是白版,不再 invert */
  opacity: 1;
  animation: none;          /* 让 v0_3 的 heroMarkIn 控制 */
}
@media (min-width: 1100px) { .hero-mark { width: 156px; } }

/* ===========================================================
   v0.4 · 王谢堂前燕 banner
   =========================================================== */
.v4-banner {
  padding: clamp(72px, 10vw, 120px) 0 clamp(40px, 6vw, 64px);
  background: linear-gradient(180deg, var(--c-bg) 0%, #f1ede4 100%);
  position: relative;
  overflow: hidden;
}
.v4-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(45,90,71,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45,90,71,0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
}
.v4-banner .container {
  position: relative;
  text-align: center;
  max-width: 920px;
  margin: 0 auto;
  padding: 0 var(--s-4);
}
.v4-banner__eyebrow {
  font-family: "Inter", system-ui, sans-serif;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-muted);
  margin: 0 0 18px;
}
.v4-banner__title {
  font-family: "Fraunces", "Noto Serif SC", serif;
  font-weight: 500;
  font-size: clamp(32px, 7vw, 72px);
  line-height: 1.2;
  letter-spacing: 0.01em;
  color: var(--c-ink);
  margin: 0 0 18px;
  display: flex;
  align-items: baseline;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.18em 0.32em;
}
.v4-banner__zh { display: inline-block; }
.v4-banner__sep {
  font-family: "Inter", sans-serif;
  font-weight: 300;
  color: var(--c-muted);
  font-size: 0.7em;
  transform: translateY(-0.06em);
  margin: 0 0.05em;
  flex: 0 0 auto;
}
.v4-banner__sub {
  font-family: "Noto Serif SC", serif;
  font-size: clamp(14px, 1.6vw, 16px);
  line-height: 1.85;
  color: var(--c-ink-soft);
  margin: 0 auto;
  max-width: 540px;
}

/* ===========================================================
   v0.4 · 通用 section head
   =========================================================== */
.v4-sec-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  margin-bottom: 40px;
  border-top: 1px solid var(--c-border);
  padding-top: 24px;
}
.v4-sec-num {
  font-family: "Inter", sans-serif;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-muted);
}
.v4-sec-title {
  font-family: "Fraunces", "Noto Serif SC", serif;
  font-weight: 500;
  font-size: clamp(28px, 4.2vw, 44px);
  line-height: 1.2;
  color: var(--c-ink);
  margin: 4px 0 6px;
}
.v4-sec-sub {
  font-family: "Noto Serif SC", serif;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-ink-soft);
  max-width: 640px;
  margin: 0;
}

/* ===========================================================
   v0.4 · 关于必佐(5 视频交替)
   =========================================================== */
.v4-about {
  padding: clamp(60px, 8vw, 96px) 0;
  background: var(--c-bg);
}
.v4-about .container { max-width: 1180px; margin: 0 auto; padding: 0 var(--s-4); }

.v4-video-carousel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 40px;
  align-items: start;
}
.v4-video-stage {
  all: unset;
  cursor: pointer;
  display: block;
  width: 100%;
  position: relative;
  border-radius: 8px;
  overflow: hidden;
}
.v4-video-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 9 / 16;
  background: #1a2520;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 18px 48px rgba(26,26,26,0.16);
}
.v4-video-placeholder {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(212,165,116,0.18), transparent 60%),
    radial-gradient(ellipse at 70% 80%, rgba(45,90,71,0.40), transparent 60%),
    #14201b;
  color: #f3ead9;
  font-family: "Inter", sans-serif;
}
.v4-video-placeholder__inner {
  display: flex; flex-direction: column; align-items: center; gap: 14px;
  border: 1px dashed rgba(243,234,217,0.4);
  padding: 28px 36px;
  border-radius: 4px;
}
.v4-video-placeholder__num {
  font-size: 22px; letter-spacing: 0.12em; font-weight: 500;
}
.v4-video-placeholder__txt {
  font-size: 12px; letter-spacing: 0.18em; text-transform: uppercase;
  opacity: 0.7;
}
.v4-video-caption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 20px 22px 22px;
  background: linear-gradient(0deg, rgba(0,0,0,0.62), rgba(0,0,0,0));
  color: #f3ead9;
  text-align: left;
}
.v4-video-caption__num {
  display: inline-block;
  font-family: "Inter", sans-serif;
  font-size: 11px;
  letter-spacing: 0.18em;
  opacity: 0.78;
  margin-bottom: 6px;
}
.v4-video-caption__title {
  display: block;
  font-family: "Noto Serif SC", serif;
  font-size: clamp(18px, 1.9vw, 22px);
  font-weight: 600;
  line-height: 1.35;
  margin-bottom: 6px;
}
.v4-video-caption__hint {
  display: block;
  font-family: "Inter", sans-serif;
  font-size: 11px;
  letter-spacing: 0.12em;
  opacity: 0.7;
}

.v4-video-tabs {
  list-style: none;
  margin: 0; padding: 0;
  display: flex; flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--c-border);
}
.v4-video-tabs li { border-bottom: 1px solid var(--c-border); }
.v4-video-tab {
  all: unset;
  cursor: pointer;
  display: grid;
  grid-template-columns: 56px 1fr 18px;
  align-items: center;
  gap: 18px;
  padding: 18px 4px;
  width: 100%;
  font-family: "Noto Serif SC", serif;
  color: var(--c-ink);
  transition: background 0.4s var(--v3-ease), color 0.4s var(--v3-ease);
}
.v4-video-tab .acc { display: none; }
.v4-video-tab .n {
  font-family: "Fraunces", serif;
  font-style: italic;
  font-weight: 400;
  font-size: 18px;
  color: var(--c-muted);
  transition: color 0.4s var(--v3-ease);
}
.v4-video-tab .t {
  font-size: 15px;
  line-height: 1.5;
  color: var(--c-ink-soft);
  transition: color 0.4s var(--v3-ease);
}
.v4-video-tab::after {
  content: "→";
  justify-self: end;
  color: var(--c-muted);
  font-family: "Inter", sans-serif;
  transition: transform 0.4s var(--v3-ease), color 0.4s var(--v3-ease);
}
.v4-video-tab:hover { background: rgba(212,165,116,0.06); }
.v4-video-tab:hover .n,
.v4-video-tab:hover .t { color: var(--c-ink); }
.v4-video-tab:hover::after { transform: translateX(4px); color: var(--c-accent); }
.v4-video-tab.is-active .n { color: var(--c-accent); font-weight: 500; }
.v4-video-tab.is-active .t { color: var(--c-ink); font-weight: 600; }
.v4-video-tab.is-active::after { content: "●"; color: var(--c-accent); font-size: 10px; }
/* v0.4 · 视频播放按钮 + 海报层 */
.v4-video-stage { width: 100%; }
.v4-video-play {
  all: unset;
  position: absolute;
  inset: 0;
  margin: auto;
  width: max-content;
  height: max-content;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px 14px 18px;
  background: rgba(20, 32, 27, 0.78);
  color: #f3ead9;
  border: 1px solid rgba(243,234,217,0.35);
  border-radius: 999px;
  font-family: "Inter", "Noto Sans SC", sans-serif;
  font-size: 13px;
  letter-spacing: 0.12em;
  cursor: pointer;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform 0.4s var(--v3-ease), background 0.4s var(--v3-ease), border-color 0.4s var(--v3-ease);
  z-index: 2;
}
.v4-video-play:hover {
  background: rgba(20, 32, 27, 0.92);
  border-color: rgba(212,165,116,0.65);
  transform: scale(1.04);
}
.v4-video-play[hidden] { display: none; }
.v4-video-play__icon {
  display: inline-block;
  width: 0; height: 0;
  border-style: solid;
  border-width: 7px 0 7px 12px;
  border-color: transparent transparent transparent #f3ead9;
  margin-left: 2px;
}
.v4-video-caption__hint[data-v4-hint] { color: rgba(243,234,217,0.7); }


/* ===========================================================
   v0.4 · 必佐产品能做什么
   =========================================================== */
.v4-can {
  padding: clamp(60px, 8vw, 96px) 0;
  background: #f6f2e8;
}
.v4-can .container { max-width: 1180px; margin: 0 auto; padding: 0 var(--s-4); }
.v4-can-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}
.v4-can-card {
  background: #fffaf0;
  border: 1px solid rgba(45,90,71,0.10);
  border-radius: 6px;
  padding: 32px 28px 26px;
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 220px;
  transition: transform 0.5s var(--v3-ease-soft), box-shadow 0.5s var(--v3-ease), border-color 0.5s var(--v3-ease);
}
.v4-can-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(26,26,26,0.10);
  border-color: var(--c-accent);
}
.v4-can-card__num {
  font-family: "Fraunces", serif;
  font-style: italic;
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--c-accent);
  margin-bottom: 14px;
}
.v4-can-card__title {
  font-family: "Noto Serif SC", serif;
  font-size: 22px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--c-ink);
  margin: 0 0 10px;
}
.v4-can-card__desc {
  font-family: "Noto Serif SC", serif;
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-ink-soft);
  margin: 0 0 18px;
  flex: 1 1 auto;
}
.v4-can-card__media {
  display: inline-block;
  font-family: "Inter", sans-serif;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-muted);
  padding-top: 12px;
  border-top: 1px solid var(--c-border);
}

/* ===========================================================
   v0.4 · 必佐产品 和服务
   =========================================================== */
.v4-svc {
  padding: clamp(60px, 8vw, 96px) 0;
  background: var(--c-bg);
}
.v4-svc .container { max-width: 1180px; margin: 0 auto; padding: 0 var(--s-4); }
.v4-svc-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}
/* 第 3 张 v4-svc-card--cta: 满宽,放在第二行 */
.v4-svc-card--cta {
  all: unset;          /* button 默认样式清掉 */
  grid-column: 1 / -1;
  text-align: left;
  cursor: pointer;
  display: flex; flex-direction: column;
  padding: 36px 32px 30px;
  background: linear-gradient(180deg, #fffdf6 0%, #f4ecdb 100%);
  border: 1px solid var(--c-border);
  border-radius: 6px;
  color: inherit;
  min-height: 240px;
  transition: transform 0.5s var(--v3-ease-soft), box-shadow 0.5s var(--v3-ease);
}
.v4-svc-card--cta:hover {
  transform: translateY(-3px);
  box-shadow: 0 20px 44px rgba(26,26,26,0.12);
}
.v4-svc-card--cta .v4-svc-card__cta { color: var(--c-accent, #d4a574); }
.v4-svc-card {
  display: flex; flex-direction: column;
  padding: 36px 32px 30px;
  background: linear-gradient(180deg, #fffdf6 0%, #f7f0dd 100%);
  border: 1px solid var(--c-border);
  border-radius: 6px;
  text-decoration: none;
  color: inherit;
  min-height: 240px;
  transition: transform 0.5s var(--v3-ease-soft), box-shadow 0.5s var(--v3-ease);
}
.v4-svc-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 20px 44px rgba(26,26,26,0.12);
}
.v4-svc-card__num {
  font-family: "Fraunces", serif;
  font-style: italic;
  font-size: 16px;
  color: var(--c-accent);
  margin-bottom: 14px;
}
.v4-svc-card__title {
  font-family: "Noto Serif SC", serif;
  font-size: 24px;
  font-weight: 600;
  color: var(--c-ink);
  margin: 0 0 10px;
}
.v4-svc-card__desc {
  font-family: "Noto Serif SC", serif;
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-ink-soft);
  margin: 0 0 22px;
  flex: 1 1 auto;
}
.v4-svc-card__cta {
  font-family: "Inter", sans-serif;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-accent);
  border-top: 1px solid var(--c-border);
  padding-top: 14px;
}

/* ===========================================================
   v0.4 · 招暮伙伴 + 营养科普(收尾两块)
   =========================================================== */
.v4-recruit, .v4-science {
  padding: clamp(40px, 6vw, 72px) 0;
  background: var(--c-bg);
}
.v4-recruit .container, .v4-science .container {
  max-width: 880px; margin: 0 auto; padding: 0 var(--s-4);
}
.v4-recruit-card, .v4-science-card {
  border: 1px solid var(--c-border);
  border-radius: 8px;
  padding: 40px 36px 36px;
  background: #fffdf6;
  text-align: left;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px 32px;
  align-items: center;
}
.v4-recruit-card__eyebrow, .v4-science-card__eyebrow {
  grid-column: 1 / -1;
  font-family: "Inter", sans-serif;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-muted);
}
.v4-recruit-card__title, .v4-science-card__title {
  font-family: "Fraunces", "Noto Serif SC", serif;
  font-weight: 500;
  font-size: clamp(24px, 3vw, 32px);
  line-height: 1.25;
  color: var(--c-ink);
  margin: 0;
}
.v4-recruit-card__desc, .v4-science-card__desc {
  font-family: "Noto Serif SC", serif;
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-ink-soft);
  margin: 0;
  grid-column: 1;
}
.v4-recruit-card__cta, .v4-science-card__cta {
  grid-row: 3; grid-column: 2;
  align-self: center;
  white-space: nowrap;
}

/* ===========================================================
   v0.4 · 报名二维码 modal
   =========================================================== */
.v4-modal {
  position: fixed; inset: 0;
  z-index: 9999;
  display: none;
  align-items: center; justify-content: center;
  padding: 24px;
}
.v4-modal[data-open="true"] {
  display: flex;
}
.v4-modal__backdrop {
  position: absolute; inset: 0;
  background: rgba(20, 24, 18, 0.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  animation: v4-modal-fade 0.32s var(--v3-ease, cubic-bezier(.4,0,.2,1));
}
.v4-modal__panel {
  position: relative;
  width: min(420px, 100%);
  background: #fffdf6;
  border: 1px solid var(--c-border);
  border-radius: 8px;
  padding: 36px 32px 28px;
  text-align: center;
  box-shadow: 0 24px 64px rgba(0,0,0,0.28), 0 2px 8px rgba(0,0,0,0.06);
  animation: v4-modal-pop 0.36s var(--v3-ease, cubic-bezier(.4,0,.2,1));
}
.v4-modal__close {
  all: unset;
  position: absolute; top: 12px; right: 14px;
  cursor: pointer;
  width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; line-height: 1;
  color: var(--c-muted);
  border-radius: 4px;
  transition: background 0.24s var(--v3-ease, cubic-bezier(.4,0,.2,1)), color 0.24s var(--v3-ease, cubic-bezier(.4,0,.2,1));
}
.v4-modal__close:hover { background: var(--c-secondary-warm, #f4ecdb); color: var(--c-ink); }
.v4-modal__eyebrow {
  font-family: "Inter", sans-serif;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-accent, #d4a574);
  margin: 0 0 10px;
}
.v4-modal__title {
  font-family: "Fraunces", "Noto Serif SC", serif;
  font-weight: 500;
  font-size: 24px;
  line-height: 1.3;
  color: var(--c-ink);
  margin: 0 0 8px;
}
.v4-modal__desc {
  font-family: "Noto Serif SC", serif;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-ink-soft);
  margin: 0 0 20px;
}
.v4-modal__qr {
  width: 240px; height: 240px;
  margin: 0 auto 16px;
  border: 1px solid var(--c-border);
  border-radius: 6px;
  overflow: hidden;
  background: #fff;
  padding: 12px;
}
.v4-modal__qr img { width: 100%; height: 100%; display: block; object-fit: contain; }
.v4-modal__hint {
  font-family: "Noto Serif SC", serif;
  font-size: 12px;
  line-height: 1.5;
  color: var(--c-muted);
  margin: 0;
}

@keyframes v4-modal-fade { from { opacity: 0; } to { opacity: 1; } }
@keyframes v4-modal-pop {
  from { opacity: 0; transform: translateY(12px) scale(0.96); }
  to   { opacity: 1; transform: translateY(0)   scale(1); }
}

/* mobile: modal 更紧凑 */
@media (max-width: 540px) {
  .v4-modal { padding: 16px; }
  .v4-modal__panel { padding: 28px 20px 22px; }
  .v4-modal__qr { width: 200px; height: 200px; }
}

/* ===========================================================
   v0.4 · 移动端
   =========================================================== */
@media (max-width: 720px) {
  .v4-banner__title { font-size: 30px; gap: 0.18em 0.2em; line-height: 1.32; }
  .v4-banner__sep { font-size: 0.62em; margin: 0 0.04em; }
  .v4-banner__sub { font-size: 14px; }
  .v4-banner__zh { display: inline-block; }
  /* v0.4 · mobile 重排: carousel 不再是 grid,DOM 顺序自然排 */
  .v4-video-carousel {
    display: block;
  }
  /* mobile 默认把 stage 视觉收起(在 carousel 里那个位置不再占空间)
     JS 搬动到 mobile-slot 后会自动移除这个类 */
  .v4-video-stage.is-parked { display: none; }
  .v4-mobile-stage {                  /* JS 注入的"行内展开容器" */
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.5s var(--v3-ease), opacity 0.4s var(--v3-ease), margin 0.4s var(--v3-ease);
    margin: 0;
  }
  .v4-mobile-stage.is-open {
    /* 视口高度限制: iPhone SE 667 减掉 tab 列表 + 章节标题 后,只剩 ~430px 给视频
       用 min(720px, calc(100vh - 200px)) 让视频不会顶满整个屏幕 */
    max-height: min(720px, calc(100vh - 220px));
    opacity: 1;
    margin: 12px 0 18px;
  }
  .v4-mobile-stage .v4-video-stage,
  .v4-mobile-stage .v4-video-frame {
    max-width: 280px !important;
    width: 280px !important;          /* 显式宽度,覆盖 width: 100% */
    margin-left: auto !important;
    margin-right: auto !important;
  }
  /* 视频容器 height 跟 max-width 联动: 280 * 16/9 = 498px,再加 caption 80px ≈ 580px */
  .v4-mobile-stage > .v4-video-frame .v4-video-placeholder,
  .v4-mobile-stage > .v4-video-frame video { width: 100%; height: 100%; object-fit: cover; }
  .v4-video-tab { grid-template-columns: 40px 1fr 14px; gap: 12px; padding: 14px 2px; }
  .v4-video-tab .n { font-size: 14px; }
  .v4-video-tab .t { font-size: 14px; }
  .v4-video-tab .acc {                 /* mobile-only chevron,active 时翻转 180° */
    display: inline-block;
    font-family: "Inter", sans-serif; font-size: 11px;
    color: var(--c-muted);
    transition: transform 0.4s var(--v3-ease);
  }
  .v4-video-tab.is-active .acc { transform: rotate(180deg); color: var(--c-accent); }
  /* mobile: 隐藏桌面 ::after (→),让出空间给 acc */
  .v4-video-tab::after { content: ""; width: 0; }
  .v4-can-grid, .v4-svc-grid { grid-template-columns: 1fr; gap: 14px; }
  .v4-can-card, .v4-svc-card { padding: 24px 20px 20px; min-height: 0; }
  .v4-recruit-card, .v4-science-card {
    grid-template-columns: 1fr;
    padding: 28px 22px 24px;
    gap: 12px;
  }
  .v4-recruit-card__cta, .v4-science-card__cta {
    grid-row: auto; grid-column: 1; justify-self: start;
  }
}

/* =========================================================
   v0.4 · Products 段：1 主卡 + 下方 3 档方案
   ========================================================= */
.products-grid {
  display: grid;
  grid-template-columns: 1fr;
  max-width: 880px;
  margin: 0 auto var(--s-5);
}
.product-card {
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  overflow: hidden;
  display: grid;
  grid-template-columns: 5fr 6fr;
  position: relative;
  transition: transform var(--dur-base) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out);
}
.product-card:hover {
  transform: translateY(-3px);
  border-color: var(--c-primary-soft);
  box-shadow: var(--shadow-card-hover);
}
.product-card__ph {
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background: var(--c-secondary);
}
.product-card__ph img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.7s var(--ease-out), filter 0.5s var(--ease-out);
  will-change: transform;
}
.product-card:hover .product-card__ph img {
  transform: scale(1.03);
}
.product-card__meta {
  padding: var(--s-5) var(--s-6);
  display: flex; flex-direction: column;
  gap: var(--s-3);
  justify-content: center;
}
.product-card__eyebrow {
  font-family: var(--font-display-en);
  font-style: italic;
  font-size: 12px;
  color: var(--c-primary);
  letter-spacing: 0.06em;
}
.product-card__name {
  font-family: var(--font-display-zh);
  font-size: clamp(26px, 3vw, 34px);
  font-weight: 600;
  color: var(--c-ink);
  margin: 0;
  letter-spacing: -0.01em;
  line-height: 1.15;
}
.product-card__price {
  display: flex; align-items: baseline;
  gap: 2px;
  padding-top: var(--s-2);
  border-top: 1px solid var(--c-border-soft);
}
.product-card__price .n {
  font-family: var(--font-display-en);
  font-size: 18px;
  color: var(--c-ink);
}
.product-card__price .v {
  font-family: var(--font-display-en);
  font-size: 44px;
  font-weight: 500;
  color: var(--c-ink);
  letter-spacing: -0.02em;
  line-height: 1;
}
.product-card__price .u {
  font-family: var(--font-body-zh);
  font-size: 13px;
  color: var(--c-muted);
  margin-left: 6px;
  letter-spacing: 0.04em;
}
.product-card__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-muted);
  margin: 0;
}
.product-card__spec {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex; flex-direction: column;
  gap: 4px;
}
.product-card__spec li {
  font-size: 13px;
  color: var(--c-ink-soft);
  padding-left: 16px;
  position: relative;
  line-height: 1.5;
}
.product-card__spec li::before {
  content: '';
  position: absolute; left: 0; top: 9px;
  width: 6px; height: 1px;
  background: var(--c-primary);
}
.product-card .btn {
  align-self: flex-start;
  margin-top: var(--s-2);
}

/* —— 3 档选择（卡片下方）—— */
.product-tiers {
  max-width: 880px;
  margin: 0 auto;
  padding: var(--s-4) var(--s-5) var(--s-5);
  background: rgba(255,255,255,0.55);
  border: 1px solid var(--c-border-soft);
  border-radius: var(--r-md);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.product-tiers__head {
  font-family: var(--font-display-en);
  font-style: italic;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-muted);
  text-transform: uppercase;
  margin-bottom: var(--s-3);
  padding-bottom: var(--s-2);
  border-bottom: 1px solid var(--c-border-soft);
}
.product-tiers__list {
  list-style: none;
  padding: 0; margin: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}
.product-tier {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto auto;
  column-gap: var(--s-2);
  row-gap: 2px;
  padding: var(--s-3) var(--s-4);
  border-right: 1px solid var(--c-border-soft);
  align-items: baseline;
}
.product-tier:last-child { border-right: none; }
.product-tier__label {
  font-family: var(--font-display-zh);
  font-size: 16px;
  font-weight: 600;
  color: var(--c-ink);
  letter-spacing: -0.005em;
  grid-column: 1; grid-row: 1;
}
.product-tier__meta {
  font-size: 12px;
  color: var(--c-muted);
  grid-column: 1; grid-row: 2;
  letter-spacing: 0.02em;
}
.product-tier__price {
  font-family: var(--font-display-en);
  font-size: 13px;
  color: var(--c-ink);
  grid-column: 2; grid-row: 1 / span 2;
  align-self: center;
}
.product-tier__price b {
  font-size: 28px;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--c-primary);
  margin-left: 1px;
}
.product-tier__tag {
  font-family: var(--font-display-en);
  font-style: italic;
  font-size: 11px;
  color: var(--c-primary);
  letter-spacing: 0.04em;
  grid-column: 1 / -1; grid-row: 3;
  margin-top: 2px;
  opacity: 0.85;
}

/* —— Mobile 适配 —— */
@media (max-width: 880px) {
  .product-card {
    grid-template-columns: 1fr;
  }
  .product-card__ph {
    aspect-ratio: 4 / 3;
  }
  .product-card__meta {
    padding: var(--s-4) var(--s-4) var(--s-5);
  }
  .product-card__price .v {
    font-size: 36px;
  }
  .product-tiers__list {
    grid-template-columns: 1fr;
  }
  .product-tier {
    border-right: none;
    border-bottom: 1px solid var(--c-border-soft);
    padding: var(--s-3) 0;
  }
  .product-tier:last-child { border-bottom: none; }
  .product-tier__price b {
    font-size: 24px;
  }
}
@media (max-width: 480px) {
  .product-tiers {
    padding: var(--s-3) var(--s-3) var(--s-4);
  }
  .product-card__name {
    font-size: 24px;
  }
}

/* =========================================================
   v0.4 · Section-head mobile 修复（看全部 CTA 不再竖排）
   ========================================================= */
@media (max-width: 880px) {
  .section-head {
    display: flex;
    flex-wrap: wrap;
    row-gap: 6px;
    column-gap: 10px;
    padding: 0 var(--s-4);
    position: relative;
  }
  .section-head__num {
    font-size: 11px;
    flex: 0 0 auto;
    order: 1;
    white-space: nowrap;
  }
  .section-head__eyebrow {
    font-size: 12px;
    flex: 1 1 auto;
    order: 2;
    text-align: right;
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .section-head__cta {
    order: 3;
    font-size: 13px;
    flex: 0 0 auto;
    margin-left: 0;
  }
  .section-head__page {
    font-size: 12px;
    order: 4;
  }
}

/* =========================================================
   v0.4 · Trust-strip 数字 + 单位 + 标签（新结构）
   ========================================================= */
.trust-strip {
  background: var(--c-primary);
  color: rgba(255,255,255,0.9);
  padding: var(--s-7) 0;
  border-top: 1px solid rgba(255,255,255,0.08);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  align-items: stretch;
}
.trust-cell {
  text-align: center;
  padding: var(--s-3) var(--s-4);
  border-right: 1px solid rgba(255,255,255,0.12);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: background 0.3s var(--ease-std);
}
.trust-cell:last-child { border-right: none; }
.trust-cell:hover { background: rgba(255,255,255,0.04); }
.trust-cell__num {
  display: flex;
  align-items: baseline;
  gap: 4px;
  color: var(--c-white);
}
.trust-cell__num .n {
  font-family: var(--font-display-en);
  font-style: italic;
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-accent);
}
.trust-cell__num .u {
  font-family: var(--font-display-zh);
  font-size: 13px;
  color: rgba(255,255,255,0.75);
  letter-spacing: 0.04em;
}
.trust-cell__lab {
  font-family: var(--font-display-zh);
  font-size: 13px;
  color: rgba(255,255,255,0.75);
  letter-spacing: 0.04em;
}
@media (max-width: 720px) {
  .trust-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .trust-cell {
    border-right: none;
    border-bottom: 1px solid rgba(255,255,255,0.12);
    padding: var(--s-4) var(--s-2);
  }
  .trust-cell:nth-child(odd) { border-right: 1px solid rgba(255,255,255,0.12); }
  .trust-cell:nth-last-child(-n+2) { border-bottom: none; }
  .trust-cell__num .n { font-size: 36px; }
  .trust-cell__lab { font-size: 12px; }
}

/* =========================================================
   v0.4 · Hero 痛点副标语（隐性饥饿 → 索道车 · 三段式）
   ========================================================= */
.hero-pain {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 14px;
  margin: 0 auto var(--s-5);
  width: min(720px, calc(100vw - 24px));
  box-sizing: border-box;
  padding: 0 12px;
  font-family: var(--font-display-zh);
  font-size: clamp(15px, 1.6vw, 19px);
  font-weight: 400;
  color: rgba(255,255,255,0.78);
  letter-spacing: 0.04em;
  line-height: 1.7;
  position: relative;
  text-wrap: balance;
  overflow-wrap: break-word; word-break: break-word;
}
.hero-pain::before {
  content: '';
  display: block;
  width: 64px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-accent), transparent);
  margin: 0 auto var(--s-4);
  opacity: 0.85;
}
.hero-pain em {
  font-style: normal;
  color: var(--c-accent);
  font-weight: 600;
  letter-spacing: 0.04em;
  margin: 0 2px;
  text-shadow: 0 0 18px rgba(196, 145, 90, 0.18);
}
.hero-pain__line {
  display: block;
  text-align: center;
  padding: 0;
  max-width: 100%;   /* v0.4 老年友好:不超出父容器 */
  overflow-wrap: break-word;
}
.hero-pain__line:nth-child(2) {
  /* 第 2 句是比喻,要更明显一点 */
  color: rgba(255,255,255,0.88);
}
.hero-pain__line:last-child {
  /* 第 3 句是答案,稍微收紧 */
  margin-top: 4px;
}
.hero-pain__tail {
  /* v0.4.1: 锁住"健康索道车。"让句号永不孤立成行(老人机窄屏) */
  white-space: nowrap;
}
@media (max-width: 720px) {
  .hero-pain {
    gap: 12px;
    font-size: 15px;
    line-height: 1.7;
    padding: 0 var(--s-4);
    letter-spacing: 0.03em;
  }
  .hero-pain::before {
    width: 48px;
    margin-bottom: var(--s-3);
  }
}

/* v0.4 · 对比表(产品介绍页)—— 桌面端完整展示,窄屏水平滚动
   - 表格最小宽度 720px,保证 4 列在桌面端不被挤压
   - 表格外层 wrap + scroll 容器,手机端 overflow-x: auto
   - 顶部"左右滑动"提示,只在窄屏显示 */
.v4-compare-table-wrap {
  max-width: 1080px;
  margin: 0 auto;
  position: relative;
}
.v4-compare-table-hint {
  display: none;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--c-muted-2);
  text-transform: uppercase;
  padding: 0 0 10px;
}
.v4-compare-table-scroll {
  overflow-x: auto;
  /* 漂亮滚动条 */
  scrollbar-width: thin;
  scrollbar-color: var(--c-border-strong) transparent;
}
.v4-compare-table-scroll::-webkit-scrollbar {
  height: 6px;
}
.v4-compare-table-scroll::-webkit-scrollbar-track {
  background: transparent;
}
.v4-compare-table-scroll::-webkit-scrollbar-thumb {
  background: var(--c-border-strong);
  border-radius: 999px;
}
.v4-compare-table {
  width: 100%;
  min-width: 720px;       /* v0.4 老年友好:最小宽度,保证 4 列完整 */
  border-collapse: collapse;
  font-size: 14px;
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
}
.v4-compare-table thead tr { background: var(--c-ink); color: var(--c-white); }
.v4-compare-table th,
.v4-compare-table td {
  padding: var(--s-3);
  border-top: 1px solid var(--c-border-soft);
  vertical-align: top;
  text-align: left;
}
.v4-compare-table thead th {
  border-top: 0;
  font-family: var(--font-body-en);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.v4-compare-table tbody tr td:first-child {
  font-weight: 600;
  background: var(--c-secondary);
}
.v4-compare-table tbody tr td:nth-child(2) {
  color: var(--c-primary);
  font-weight: 600;
}

/* v0.4 · 窄屏(<720px):显示左右滑动提示 */
@media (max-width: 720px) {
  .v4-compare-table-hint {
    display: block;
  }
}