/* ============ TOKENS ============ */
:root {
  --bg: #16241c;
  --bg-soft: #1d2e23;
  --bg-2: #0f1a14;
  --panel: rgba(232, 220, 195, 0.045);
  --panel-brd: rgba(200, 175, 130, 0.20);
  --txt: #ece4d0;
  --txt-dim: #b8a890;
  --txt-faint: #7a6f56;
  --gold: #c9a875;
  --gold-2: #a37d4d;
  --gold-3: #d4b87a;
  --grad: linear-gradient(120deg, #d4b87a 0%, #c9a875 50%, #a37d4d 100%);
  --grad-soft: linear-gradient(120deg, rgba(212,184,122,.15), rgba(163,125,77,.10));
  --radius: 18px;
  --maxw: 1180px;
  --ease: cubic-bezier(.22, 1, .36, 1);
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--txt);
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", Georgia, "Times New Roman", serif;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
.accent {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ============ NAV ============ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(22, 36, 28, 0.55);
  border-bottom: 1px solid transparent;
  transition: border-color .4s, background .4s;
}
.nav.is-scrolled { border-bottom: 1px solid var(--panel-brd); background: rgba(22,36,28,.88); }
.nav__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 16px 28px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.nav__logo {
  font-weight: 800;
  font-size: 18px;
  letter-spacing: .5px;
  white-space: nowrap;
}
.nav__logo span { font-weight: 400; color: var(--gold); margin-left: 4px; font-size: 14px; }
.nav__links {
  display: flex;
  gap: 26px;
  list-style: none;
  margin-left: auto;
  font-size: 14px;
}
.nav__links a { color: var(--txt-dim); transition: color .25s; }
.nav__links a:hover { color: var(--txt); }
.nav__lang { display: flex; gap: 6px; margin-left: 8px; }
.lang-btn {
  background: transparent;
  border: 1px solid var(--panel-brd);
  color: var(--txt-faint);
  font-size: 12px;
  padding: 5px 9px;
  border-radius: 8px;
  cursor: pointer;
  transition: all .25s;
  font-family: inherit;
}
.lang-btn:hover { color: var(--txt); }
.lang-btn.is-active { color: #16241c; background: var(--grad); border-color: transparent; font-weight: 600; }

/* ============ HERO ============ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: 120px 24px 80px;
}
.hero__glow {
  position: absolute;
  width: 70vw; height: 70vw;
  max-width: 760px; max-height: 760px;
  background: radial-gradient(circle, rgba(212,184,122,.22), rgba(163,125,77,.10) 40%, transparent 70%);
  filter: blur(40px);
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  animation: float 9s ease-in-out infinite;
}
.hero__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(200,175,130,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200,175,130,.06) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(circle at 50% 40%, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(circle at 50% 40%, #000 0%, transparent 75%);
}
@keyframes float { 0%,100% { transform: translate(-50%,-50%) scale(1); } 50% { transform: translate(-50%,-53%) scale(1.08); } }
.hero__content { position: relative; z-index: 2; max-width: 880px; }
.hero__eyebrow {
  font-size: 13px;
  letter-spacing: 5px;
  color: var(--gold);
  margin-bottom: 28px;
  font-weight: 600;
}
.hero__title {
  font-size: clamp(44px, 8vw, 92px);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: -1px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.hero__sub {
  margin: 30px auto 0;
  color: var(--txt-dim);
  font-size: clamp(15px, 2vw, 18px);
  max-width: 620px;
}
.hero__cta { margin-top: 44px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-block;
  padding: 14px 30px;
  border-radius: 100px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: transform .3s var(--ease), box-shadow .3s, background .3s, border-color .3s;
  border: 1px solid transparent;
}
.btn--primary { background: var(--grad); color: #16241c; box-shadow: 0 10px 40px rgba(163,125,77,.35); }
.btn--primary:hover { transform: translateY(-3px); box-shadow: 0 16px 50px rgba(163,125,77,.5); }
.btn--ghost { border-color: var(--panel-brd); color: var(--txt); }
.btn--ghost:hover { border-color: var(--gold); color: var(--gold); transform: translateY(-3px); }
.hero__scroll {
  position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%);
  color: var(--txt-faint); font-size: 22px;
  animation: bob 2s ease-in-out infinite;
}
@keyframes bob { 0%,100% { transform: translate(-50%,0); } 50% { transform: translate(-50%,8px); } }

/* ============ SECTION ============ */
.section { max-width: var(--maxw); margin: 0 auto; padding: 110px 28px; }
.section__head { max-width: 720px; margin-bottom: 56px; }
.section__no {
  font-family: "Cormorant Garamond", "Noto Serif SC", serif;
  font-size: 15px; letter-spacing: 3px;
  color: var(--gold); display: inline-block; margin-bottom: 14px;
}
.section__title { font-size: clamp(28px, 4.4vw, 46px); font-weight: 800; letter-spacing: -.5px; line-height: 1.2; }
.section__lead { margin-top: 18px; color: var(--txt-dim); font-size: 17px; }

/* reveal */
.reveal { opacity: 0; transform: translateY(34px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }

/* ============ CONCEPT ============ */
.concept__cards { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.ccard {
  background: var(--panel);
  border: 1px solid var(--panel-brd);
  border-radius: var(--radius);
  padding: 38px 34px;
  backdrop-filter: blur(6px);
  transition: transform .35s var(--ease), border-color .35s;
}
.ccard:hover { transform: translateY(-6px); border-color: rgba(212,184,122,.45); }
.ccard__icon { font-size: 34px; background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; margin-bottom: 16px; }
.ccard h3 { font-size: 22px; margin-bottom: 10px; }
.ccard p { color: var(--txt-dim); font-size: 15px; }
.concept__formula {
  margin-top: 40px;
  padding: 28px 30px;
  border-radius: var(--radius);
  background: var(--grad-soft);
  border: 1px solid var(--panel-brd);
  display: flex; flex-wrap: wrap; align-items: center; gap: 14px 18px;
  font-size: 15px;
}
.concept__formula i { color: var(--gold); font-style: normal; }
.concept__formula strong { background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; font-size: 18px; font-weight: 800; }

/* ============ PERI / TIMELINE ============ */
.timeline { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; position: relative; }
.timeline::before { content: ""; position: absolute; top: 7px; left: 8%; right: 8%; height: 1px; background: linear-gradient(90deg, transparent, var(--panel-brd), transparent); }
.tl { position: relative; padding-top: 34px; }
.tl__dot { position: absolute; top: 0; left: 0; width: 14px; height: 14px; border-radius: 50%; background: var(--grad); box-shadow: 0 0 0 5px rgba(163,125,77,.18); }
.tl h4 { font-size: 19px; margin-bottom: 10px; }
.tl p { color: var(--txt-dim); font-size: 15px; }

/* ============ PRODUCT / PHASES ============ */
.phases { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.phase {
  background: var(--panel);
  border: 1px solid var(--panel-brd);
  border-radius: var(--radius);
  padding: 32px 30px;
  position: relative;
  overflow: hidden;
  transition: transform .35s var(--ease), border-color .35s;
}
.phase::before { content: ""; position: absolute; inset: 0; background: var(--grad-soft); opacity: 0; transition: opacity .35s; }
.phase:hover { transform: translateY(-6px); border-color: rgba(212,184,122,.45); }
.phase:hover::before { opacity: 1; }
.phase > * { position: relative; }
.phase__no { font-family: "Cormorant Garamond", "Noto Serif SC", serif; font-size: 13px; letter-spacing: 3px; color: var(--gold); }
.phase h4 { font-size: 19px; margin: 10px 0 8px; }
.phase p { color: var(--txt-dim); font-size: 15px; }
.product__price { margin-top: 40px; text-align: center; display: flex; flex-direction: column; align-items: center; gap: 18px; }
.product__price-divider { width: 56px; height: 1px; background: var(--gold); opacity: 0.7; }
.product__price-note { color: var(--txt-dim); font-size: 14px; letter-spacing: 0.04em; line-height: 1.7; max-width: 560px; margin: 0 auto; font-weight: 400; }

/* ============ EVIDENCE ============ */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-bottom: 50px; }
.stat { text-align: center; padding: 30px 14px; background: var(--panel); border: 1px solid var(--panel-brd); border-radius: var(--radius); }
.stat strong { display: block; font-size: 46px; font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; line-height: 1; }
.stat strong small { font-size: 22px; }
.stat span { color: var(--txt-dim); font-size: 14px; margin-top: 8px; display: block; }
.nutrients { background: var(--panel); border: 1px solid var(--panel-brd); border-radius: var(--radius); padding: 34px 36px; }
.nutrients h4 { font-size: 18px; margin-bottom: 18px; }
.nutrients ul { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 14px 30px; }
.nutrients li { color: var(--txt-dim); font-size: 15px; padding-left: 22px; position: relative; }
.nutrients li::before { content: "✦"; position: absolute; left: 0; color: var(--gold); }
.evidence__patent { margin-top: 28px; text-align: center; color: var(--txt-faint); font-size: 13px; letter-spacing: .5px; }

/* ============ BRAND ============ */
.brand__inner { display: grid; grid-template-columns: 1.3fr .7fr; gap: 50px; align-items: center; }
.brand__text .section__title { margin: 10px 0 20px; }
.brand__text p { color: var(--txt-dim); font-size: 16px; margin-bottom: 14px; }
.brand__holder { color: var(--txt-faint) !important; font-size: 13px !important; }
.brand__mark { display: flex; align-items: center; justify-content: center; }
.brand__ring {
  width: 240px; height: 240px; border-radius: 50%;
  background: var(--grad-soft);
  border: 1px solid var(--panel-brd);
  display: flex; align-items: center; justify-content: center;
  position: relative;
  box-shadow: 0 0 80px rgba(163,125,77,.25);
  animation: spin 18s linear infinite;
}
.brand__ring::after { content: ""; position: absolute; inset: -1px; border-radius: 50%; border: 1px dashed rgba(212,184,122,.4); }
@keyframes spin { to { transform: rotate(360deg); } }
.brand__mark span { position: absolute; text-align: center; font-family: "Cormorant Garamond", "Noto Serif SC", serif; font-size: 26px; line-height: 1.3; font-weight: 600; }

/* ============ CONTACT ============ */
.contact { text-align: center; }
.contact .section__head { margin-left: auto; margin-right: auto; }
.contact__cta { margin-top: 14px; }
.contact__note { margin-top: 22px; color: var(--txt-faint); font-size: 14px; letter-spacing: 1px; }

/* ============ FOOTER ============ */
.footer { border-top: 1px solid var(--panel-brd); padding: 38px 28px; }
.footer__inner { max-width: var(--maxw); margin: 0 auto; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; align-items: center; }
.footer__brand { font-weight: 700; }
.footer__copy { color: var(--txt-faint); font-size: 13px; }

/* ============ RESPONSIVE ============ */
@media (max-width: 880px) {
  .nav__links { display: none; }
  .concept__cards, .phases, .timeline, .nutrients ul { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr 1fr; }
  .brand__inner { grid-template-columns: 1fr; }
  .timeline::before { display: none; }
  .section { padding: 80px 22px; }
}
@media (max-width: 520px) {
  .stats { grid-template-columns: 1fr; }
  .hero__cta { flex-direction: column; }
}


/* ============ SILK 追加（基于 v1 基线 7156e9f 之上） ============ */

/* 噪点纹理层（纤维感） */
.silk-noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.05;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='220' height='220'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='0.55'/></svg>");
}

/* 慢速漂移光晕（"丝绸在风中"） */
.silk-glow {
  position: fixed;
  pointer-events: none;
  z-index: 0;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.55;
}
.silk-glow--1 {
  width: 60vw; height: 60vw;
  max-width: 720px; max-height: 720px;
  background: radial-gradient(circle, rgba(212,184,122,.20), transparent 65%);
  top: -15%; right: -20%;
  animation: silkFloat1 28s ease-in-out infinite;
}
.silk-glow--2 {
  width: 55vw; height: 55vw;
  max-width: 640px; max-height: 640px;
  background: radial-gradient(circle, rgba(163,125,77,.16), transparent 65%);
  bottom: -10%; left: -15%;
  animation: silkFloat2 36s ease-in-out infinite;
}
@keyframes silkFloat1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50%      { transform: translate(-8vw, 5vh) scale(1.18); }
}
@keyframes silkFloat2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50%      { transform: translate(6vw, -4vh) scale(1.12); }
}

/* 鼠标光斑跟随 */
.cursor-glow {
  position: fixed;
  pointer-events: none;
  z-index: 0;
  width: 420px; height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(212,184,122,.13), transparent 60%);
  filter: blur(32px);
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity .5s;
  will-change: transform;
}
.cursor-glow.is-active { opacity: 1; }

/* 内容提升到光斑之上 */
.nav, .section, .hero, .footer, main, .header { position: relative; z-index: 2; }

/* 卡片光泽划过（hover shine sweep） */
.ccard, .phase, .stat, .nutrients { position: relative; overflow: hidden; }
.ccard::after, .phase::after, .stat::after, .nutrients::after {
  content: "";
  position: absolute;
  top: 0; left: -100%;
  width: 60%; height: 100%;
  background: linear-gradient(110deg, transparent 30%, rgba(232,228,208,.09) 50%, transparent 70%);
  transform: skewX(-20deg);
  transition: left .8s var(--ease);
  pointer-events: none;
}
.ccard:hover::after, .phase:hover::after, .stat:hover::after, .nutrients:hover::after {
  left: 130%;
}

/* 导航 active 下划线 + 高亮 */
.nav__links a {
  position: relative;
  padding: 4px 0;
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform .35s var(--ease);
}
.nav__links a:hover::after,
.nav__links a.is-active::after {
  transform: scaleX(1);
}
.nav__links a.is-active { color: var(--gold); }

/* 数字等宽（count-up 不抖） */
.stat strong { font-variant-numeric: tabular-nums; }

/* 移动端关闭鼠标光斑 + 漂移光晕（性能 + 没必要） */
@media (hover: none) {
  .cursor-glow { display: none; }
  .silk-glow--1, .silk-glow--2 { opacity: 0.3; }
}

/* ============ 备案号 / Beian ============ */
.footer__beian {
  display: block;
  text-align: center;
  margin-top: 18px;
  color: var(--txt-faint);
  font-size: 13px;
  letter-spacing: .5px;
  text-decoration: none;
  transition: color .25s;
}
.footer__beian::before {
  content: "🛡\FE0F";
  margin-right: 4px;
  font-size: 12px;
}
.footer__beian:hover { color: var(--gold); }
/* ============ NUTRIENTS SECTION ============ */
.nutrients-section { background: var(--bg); }
.nutrients-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 50px;
}
.ncard {
  background: var(--panel);
  border: 1px solid var(--panel-brd);
  border-radius: var(--radius);
  padding: 26px 22px;
  transition: border-color .3s, transform .3s;
}
.ncard:hover {
  border-color: rgba(201,168,117,.4);
  transform: translateY(-4px);
}
.ncard__icon {
  color: var(--gold);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: rgba(201,168,117,.08);
  border-radius: 12px;
}
.ncard h4 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.ncard p {
  color: var(--txt-dim);
  font-size: 14px;
  line-height: 1.65;
}

/* ============ PRODUCTS SECTION ============ */
.products { background: var(--bg); }
.products-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 22px;
  margin-top: 50px;
}
.prod-card {
  background: var(--panel);
  border: 1px solid var(--panel-brd);
  border-radius: var(--radius);
  padding: 30px 26px;
  position: relative;
  transition: border-color .3s, transform .35s, box-shadow .35s;
  overflow: hidden;
}
.prod-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--grad-soft);
  opacity: 0;
  transition: opacity .35s;
}
.prod-card:hover {
  border-color: rgba(201,168,117,.45);
  transform: translateY(-6px);
  box-shadow: 0 20px 60px rgba(0,0,0,.35);
}
.prod-card:hover::before { opacity: 1; }
.prod-card > * { position: relative; }
.prod-card--gift {
  border-color: rgba(201,168,117,.3);
}
.prod-card__badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--txt);
  background: var(--panel-brd);
  border: 1px solid var(--panel-brd);
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 14px;
}
.prod-card__badge--gold {
  background: rgba(201,168,117,.15);
  border-color: rgba(201,168,117,.4);
  color: var(--gold);
}
.prod-card__header {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 18px;
}
.prod-card__icon {
  color: var(--gold);
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.prod-card__name {
  font-size: 19px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 4px;
}
.prod-card__ename {
  font-family: "Cormorant Garamond", "Noto Serif SC", serif;
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--gold);
  opacity: .7;
}
.prod-card__desc {
  color: var(--txt-dim);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 18px;
}
.prod-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.ptag {
  display: inline-block;
  font-size: 12px;
  padding: 4px 12px;
  background: rgba(201,168,117,.1);
  border: 1px solid rgba(201,168,117,.25);
  border-radius: 20px;
  color: var(--gold);
  white-space: nowrap;
}
.prod-card__patent {
  font-size: 12px;
  color: var(--txt-dim);
  background: rgba(201,168,117,.05);
  border: 1px solid rgba(201,168,117,.15);
  border-radius: 8px;
  padding: 12px 14px;
  line-height: 1.8;
  margin-bottom: 16px;
  font-family: monospace;
  white-space: pre-line;
}

/* ============ PRODUCTS USAGE ============ */
.products__usage {
  margin-top: 50px;
  background: var(--panel);
  border: 1px solid var(--panel-brd);
  border-radius: var(--radius);
  padding: 34px 40px;
  text-align: center;
}
.products__usage h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 28px;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.usage-steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 30px;
  margin-bottom: 20px;
}
.usage-step { text-align: center; }
.usage-step__am,
.usage-step__pm {
  font-family: "Cormorant Garamond", serif;
  font-size: 28px;
  font-weight: 700;
  color: var(--gold);
  margin-bottom: 8px;
  letter-spacing: 2px;
}
.usage-step p { color: var(--txt-dim); font-size: 14px; }
.usage-step__sep {
  font-size: 28px;
  color: var(--gold);
  opacity: .5;
}
.usage-note {
  font-size: 13px;
  color: var(--txt-dim);
  font-style: italic;
  opacity: .8;
}

/* ============ BRAND HIGHLIGHTS ============ */
.brand__highlights {
  display: flex;
  justify-content: center;
  gap: 0;
  margin-top: 50px;
  border: 1px solid var(--panel-brd);
  border-radius: var(--radius);
  overflow: hidden;
}
.bhi {
  flex: 1;
  text-align: center;
  padding: 28px 20px;
  background: var(--panel);
  border-right: 1px solid var(--panel-brd);
  transition: background .3s;
}
.bhi:last-child { border-right: none; }
.bhi:hover { background: rgba(201,168,117,.06); }
.bhi strong {
  display: block;
  font-size: 36px;
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 8px;
}
.bhi strong small { font-size: 18px; }
.bhi span {
  font-size: 13px;
  color: var(--txt-dim);
  letter-spacing: 1px;
}

/* ============ RESPONSIVE ============ */
@media (max-width: 880px) {
  .nutrients-grid { grid-template-columns: repeat(2, 1fr); }
  .products-grid { grid-template-columns: 1fr; }
  .usage-steps { flex-direction: column; gap: 16px; }
  .usage-step__sep { display: none; }
  .brand__highlights { flex-wrap: wrap; }
  .bhi { min-width: 50%; }
}
@media (max-width: 520px) {
  .nutrients-grid { grid-template-columns: 1fr; }
  .brand__highlights { flex-direction: column; }
  .bhi { border-right: none; border-bottom: 1px solid var(--panel-brd); }
  .bhi:last-child { border-bottom: none; }
}

/* ============================================
   产品大图（.prod-card__image）
   ============================================ */
.prod-card__image {
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: 14px;
  overflow: hidden;
  margin-bottom: 22px;
  background: linear-gradient(135deg, #0f1a14 0%, #1a2820 100%);
  position: relative;
  border: 1px solid var(--panel-brd);
}
.prod-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transition: transform 0.8s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.prod-card:hover .prod-card__image img {
  transform: scale(1.05);
}
.prod-card--gift .prod-card__image {
  aspect-ratio: 16 / 9;
}
@media (max-width: 520px) {
  .prod-card__image { aspect-ratio: 16 / 10; }
  .prod-card--gift .prod-card__image { aspect-ratio: 4 / 3; }
}

/* ============================================
   营养素 section 顶部大图（.nutrients__bg）
   ============================================ */
.nutrients__bg {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 7;
  border-radius: 18px;
  overflow: hidden;
  margin: 0 auto 56px;
  background: #0a1410;
  border: 1px solid var(--panel-brd);
}
.nutrients__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  filter: brightness(0.72) saturate(0.85);
  transition: filter 0.6s ease;
}
.nutrients__bg:hover img {
  filter: brightness(0.85) saturate(1);
}
.nutrients__bg-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  padding: 32px 40px;
  background: linear-gradient(180deg, transparent 0%, transparent 50%, rgba(10, 20, 16, 0.75) 100%);
}
.nutrients__bg-tag {
  font-family: 'Cormorant Garamond', 'Noto Serif SC', serif;
  font-size: 22px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--gold);
  border-left: 2px solid var(--gold);
  padding-left: 16px;
}
@media (max-width: 880px) {
  .nutrients__bg { aspect-ratio: 16 / 9; }
  .nutrients__bg-overlay { padding: 24px 28px; }
  .nutrients__bg-tag { font-size: 18px; }
}
@media (max-width: 520px) {
  .nutrients__bg { aspect-ratio: 4 / 3; margin-bottom: 40px; }
  .nutrients__bg-overlay { padding: 18px 22px; }
  .nutrients__bg-tag { font-size: 16px; }
}

/* ============================================
   品牌 section 顶部 hero 图（.brand__hero）
   ============================================ */
.brand__hero {
  position: relative;
  width: 100%;
  aspect-ratio: 21 / 9;
  border-radius: 20px;
  overflow: hidden;
  margin-bottom: 56px;
  background: #0a1410;
  border: 1px solid var(--panel-brd);
  box-shadow: 0 30px 60px -30px rgba(0, 0, 0, 0.6);
}
.brand__hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  filter: brightness(0.88) saturate(0.95);
  transition: transform 1.2s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.brand__hero:hover img {
  transform: scale(1.03);
  filter: brightness(0.95) saturate(1.05);
}
.brand__hero-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  padding: 36px 44px;
  background: linear-gradient(135deg, rgba(10, 20, 16, 0.4) 0%, transparent 50%, rgba(10, 20, 16, 0.65) 100%);
}
.brand__hero-tag {
  font-family: 'Cormorant Garamond', 'Noto Serif SC', serif;
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--gold);
  text-align: right;
  line-height: 1.6;
}
@media (max-width: 880px) {
  .brand__hero { aspect-ratio: 16 / 9; }
  .brand__hero-overlay { padding: 26px 32px; }
  .brand__hero-tag { font-size: 15px; }
}
@media (max-width: 520px) {
  .brand__hero { aspect-ratio: 4 / 3; border-radius: 14px; margin-bottom: 40px; }
  .brand__hero-overlay { padding: 20px 24px; }
  .brand__hero-tag { font-size: 13px; letter-spacing: 0.12em; }
}

/* ============================================
   右侧滚动导航条（.section-nav）
   ============================================ */
.section { scroll-margin-top: 80px; }
.section-nav {
  position: fixed;
  top: 50%;
  right: 24px;
  transform: translateY(-50%);
  z-index: 50;
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 18px 12px;
  background: rgba(10, 20, 16, 0.55);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(201, 168, 117, 0.15);
  border-radius: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}
.section-nav.is-visible { opacity: 1; pointer-events: auto; }
.section-nav__dot {
  position: relative;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(236, 228, 208, 0.25);
  transition: all 0.3s cubic-bezier(0.2, 0.7, 0.2, 1);
  cursor: pointer;
}
.section-nav__dot:hover { background: rgba(201, 168, 117, 0.6); transform: scale(1.3); }
.section-nav__dot.is-active {
  background: var(--gold);
  box-shadow: 0 0 12px rgba(201, 168, 117, 0.55);
  transform: scale(1.4);
}
.section-nav__dot.is-active::before {
  content: '';
  position: absolute;
  inset: -4px;
  border: 1px solid var(--gold);
  border-radius: 50%;
  opacity: 0.4;
  animation: navPulse 2s ease-in-out infinite;
}
@keyframes navPulse {
  0%, 100% { transform: scale(1); opacity: 0.4; }
  50% { transform: scale(1.6); opacity: 0; }
}
.section-nav__label {
  position: absolute;
  right: calc(100% + 14px);
  top: 50%;
  transform: translateY(-50%) translateX(8px);
  background: rgba(10, 20, 16, 0.92);
  border: 1px solid var(--gold);
  color: var(--gold);
  padding: 5px 12px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: all 0.25s ease;
}
.section-nav__dot:hover .section-nav__label,
.section-nav__dot.is-active .section-nav__label {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}
@media (max-width: 880px) { .section-nav { display: none; } }