/* 尊荣 ZUNRONG · 静奢药草档案风
   纸白底 / 墨黑字 / 哑金与青瓷点缀；层级靠发丝线与留白，不靠重阴影。 */

/* ---------------------------------------------------------------- 字体 */
@font-face {
  font-family: 'Cormorant Garamond';
  src: url('../fonts/cormorant-300.woff2') format('woff2');
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Cormorant Garamond';
  src: url('../fonts/cormorant-400.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Cormorant Garamond';
  src: url('../fonts/cormorant-600.woff2') format('woff2');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Cormorant Garamond';
  src: url('../fonts/cormorant-300-italic.woff2') format('woff2');
  font-weight: 300;
  font-style: italic;
  font-display: swap;
}

/* ------------------------------------------------------------- 设计令牌 */
:root {
  --paper: #f7f3ec;
  --paper-deep: #f1ece2;
  --mist: #e7e0d4;
  --ink: #14140f;
  --slate: #4a463e;
  --slate-soft: #7d766a;
  --celadon: #a9ded8;
  --celadon-deep: #4e8d86;
  --gold: #b79c6a;
  --gold-soft: #d8c49a;

  --line: rgba(20, 20, 15, 0.14);
  --hair: rgba(20, 20, 15, 0.08);
  --line-invert: rgba(247, 243, 236, 0.22);

  --wrap: 1240px;
  --gutter: clamp(20px, 4vw, 56px);
  --s1: 8px;
  --s2: 16px;
  --s3: 24px;
  --s4: 32px;
  --s5: 48px;
  --s6: 64px;
  --s7: 96px;
  --s8: 136px;

  --serif: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
  --han: 'Source Han Serif SC', 'Source Han Serif SC Heavy', 'Noto Serif SC',
    'Songti SC', SimSun, serif;
  --sans: 'Noto Sans SC', 'Microsoft YaHei', 'PingFang SC', system-ui, sans-serif;

  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --r: 3px;
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: clamp(15px, 0.35vw + 14px, 16.5px);
  line-height: 1.85;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* 全站纸纹，固定不随滚动，避免长页面出现接缝 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: url('../img/tex-paper.jpg') center / 900px 900px;
  opacity: 0.5;
  mix-blend-mode: multiply;
  pointer-events: none;
  z-index: 0;
}

body > * {
  position: relative;
  z-index: 1;
}

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

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

button,
input,
select {
  font: inherit;
  color: inherit;
}

h1,
h2,
h3,
h4,
p {
  margin: 0;
  text-wrap: pretty;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

::selection {
  background: var(--ink);
  color: var(--paper);
}

:focus-visible {
  outline: 1.5px solid var(--celadon-deep);
  outline-offset: 3px;
}

/* ------------------------------------------------------------ 排版零件 */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.en {
  font-family: var(--serif);
  font-weight: 300;
  letter-spacing: 0.08em;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: var(--s2);
  font-family: var(--serif);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--slate-soft);
}

.eyebrow::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--line);
}

.sect-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr);
  gap: var(--s5);
  align-items: end;
  padding-bottom: var(--s3);
  border-bottom: 1px solid var(--line);
  margin-bottom: var(--s5);
}

.sect-num {
  font-family: var(--serif);
  font-size: clamp(2.4rem, 4vw, 3.4rem);
  font-weight: 300;
  line-height: 1;
  color: var(--gold);
  letter-spacing: 0.02em;
}

.sect-num small {
  display: block;
  font-family: var(--sans);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--slate-soft);
  margin-top: var(--s1);
}

h2.sect-title {
  font-family: var(--han);
  font-weight: 900;
  font-size: clamp(1.7rem, 3.2vw, 2.5rem);
  line-height: 1.32;
  letter-spacing: 0.02em;
}

.sect-title .sub {
  display: block;
  font-family: var(--serif);
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--slate-soft);
  margin-top: var(--s2);
}

.lede {
  max-width: 62ch;
  color: var(--slate);
  font-size: 1.02rem;
  line-height: 1.95;
}

.section {
  padding-block: var(--s8);
}

.section--tight {
  padding-block: var(--s7);
}

.rule {
  height: 1px;
  background: var(--line);
  border: 0;
  margin: 0;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--slate);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 4px 10px;
}

.tag--gold {
  border-color: rgba(183, 156, 106, 0.5);
  color: #7d6737;
}

.tag--pending {
  border-style: dashed;
  border-color: rgba(183, 156, 106, 0.7);
  color: #7d6737;
  background: rgba(183, 156, 106, 0.07);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid var(--ink);
  border-radius: var(--r);
  background: transparent;
  font-size: 0.86rem;
  letter-spacing: 0.14em;
  cursor: pointer;
  transition: background 260ms var(--ease), color 260ms var(--ease),
    border-color 260ms var(--ease);
}

.btn:hover,
.btn:focus-visible {
  background: var(--ink);
  color: var(--paper);
}

.btn--solid {
  background: var(--ink);
  color: var(--paper);
}

.btn--solid:hover {
  background: transparent;
  color: var(--ink);
}

.btn[disabled] {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ---------------------------------------------------------------- 页头 */
.site-head {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(247, 243, 236, 0.86);
  backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid var(--hair);
}

.site-head .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s4);
  min-height: 74px;
}

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

.brand img {
  width: 46px;
  height: auto;
}

.brand-txt {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.brand-txt b {
  font-family: var(--serif);
  font-size: 1.16rem;
  font-weight: 600;
  letter-spacing: 0.3em;
}

.brand-txt span {
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  color: var(--slate-soft);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--s4);
  font-size: 0.84rem;
}

.nav a {
  position: relative;
  padding-block: 6px;
  color: var(--slate);
  transition: color 220ms var(--ease);
}

.nav a::after {
  content: '';
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 0;
  height: 1px;
  background: var(--ink);
  transition: right 280ms var(--ease);
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--ink);
}

.nav a:hover::after,
.nav a:focus-visible::after {
  right: 0;
}

.nav .btn {
  min-height: 38px;
  padding-inline: 16px;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: transparent;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: '';
  display: block;
  width: 18px;
  height: 1px;
  background: var(--ink);
  position: relative;
}

.nav-toggle span::before {
  position: absolute;
  top: -6px;
}

.nav-toggle span::after {
  position: absolute;
  top: 6px;
}

/* ---------------------------------------------------------------- 首屏 */
.hero {
  padding-block: clamp(48px, 8vw, 104px) 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
}

.hero-copy {
  max-width: 34rem;
}

.hero h1 {
  font-family: var(--han);
  font-weight: 900;
  font-size: clamp(2.6rem, 6vw, 4.6rem);
  line-height: 1.12;
  letter-spacing: 0.03em;
  margin-block: var(--s3) var(--s2);
}

.hero h1 em {
  display: block;
  font-family: var(--serif);
  font-style: italic;
  font-weight: 300;
  font-size: 0.34em;
  letter-spacing: 0.16em;
  color: var(--slate-soft);
  margin-top: var(--s3);
}

.hero-lead {
  color: var(--slate);
  line-height: 2;
}

.hero-lead + .hero-lead {
  margin-top: var(--s3);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s2);
  margin-top: var(--s5);
}

.hero-figure {
  position: relative;
}

.hero-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--r);
}

.hero-card {
  position: absolute;
  left: -4%;
  bottom: 7%;
  width: min(266px, 60%);
  background: rgba(247, 243, 236, 0.94);
  backdrop-filter: blur(6px);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: var(--s3);
}

.hero-card dt {
  font-family: var(--serif);
  font-size: 0.72rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--slate-soft);
}

.hero-card dd {
  margin: 4px 0 var(--s2);
  font-size: 0.94rem;
}

.hero-card dd:last-child {
  margin-bottom: 0;
}

/* 参数条 */
.specbar {
  margin-top: clamp(40px, 6vw, 80px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.specbar div {
  padding: var(--s3) var(--s3) var(--s3) 0;
  border-right: 1px solid var(--hair);
}

.specbar div:last-child {
  border-right: 0;
}

.specbar dt {
  font-family: var(--serif);
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--slate-soft);
  margin-bottom: 6px;
}

.specbar dd {
  margin: 0;
  font-size: 0.98rem;
}

.specbar dd b {
  font-family: var(--serif);
  font-size: 1.32rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* ------------------------------------------------------------ 产品体系 */
.sku-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--s4);
}

.sku {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: rgba(255, 255, 255, 0.42);
  overflow: hidden;
  transition: border-color 300ms var(--ease), transform 300ms var(--ease);
}

.sku:hover {
  border-color: rgba(20, 20, 15, 0.3);
  transform: translateY(-3px);
}

.sku-media {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--paper-deep);
}

.sku-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 700ms var(--ease);
}

.sku:hover .sku-media img {
  transform: scale(1.035);
}

.sku-media .tag {
  position: absolute;
  top: var(--s2);
  left: var(--s2);
  background: rgba(247, 243, 236, 0.9);
}

.sku-body {
  padding: var(--s3) var(--s3) var(--s4);
  display: flex;
  flex-direction: column;
  gap: var(--s2);
  flex: 1;
}

.sku-body h3 {
  font-family: var(--han);
  font-weight: 900;
  font-size: 1.16rem;
  line-height: 1.5;
}

.sku-body .en-name {
  font-family: var(--serif);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--slate-soft);
}

.sku-spec {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding-block: var(--s2);
  border-top: 1px solid var(--hair);
  border-bottom: 1px solid var(--hair);
}

.sku-spec b {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 600;
  white-space: nowrap;
}

.sku-spec span {
  font-size: 0.8rem;
  color: var(--slate-soft);
}

.sku-fit {
  font-size: 0.9rem;
  color: var(--slate);
  line-height: 1.9;
}

.claim-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
  padding-top: var(--s2);
}

.claim-row span {
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--slate);
  border: 1px solid var(--hair);
  border-radius: 2px;
  padding: 2px 8px;
}

/* --------------------------------------------------------- 配方与工艺 */
.formula {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(32px, 5vw, 80px);
  align-items: start;
}

.ledger {
  border-top: 1px solid var(--line);
}

.ledger li {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--s3);
  align-items: baseline;
  padding-block: var(--s3);
  border-bottom: 1px solid var(--hair);
}

.ledger .idx {
  font-family: var(--serif);
  font-size: 1.1rem;
  color: var(--gold);
  letter-spacing: 0.06em;
}

.ledger .zh {
  font-size: 1.02rem;
}

.ledger .lat {
  font-family: var(--serif);
  font-size: 0.86rem;
  letter-spacing: 0.04em;
  color: var(--slate-soft);
}

.formula-note {
  margin-top: var(--s4);
  padding: var(--s3);
  border-left: 2px solid var(--celadon);
  background: rgba(169, 222, 216, 0.12);
  font-size: 0.92rem;
  color: var(--slate);
}

.dual {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
}

.dual img {
  width: 100%;
  height: auto;
}

.dual .pin {
  position: absolute;
  transform: translate(-50%, -50%);
}

.dual .pin b {
  display: grid;
  place-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--serif);
  font-size: 0.86rem;
  font-weight: 400;
  box-shadow: 0 0 0 4px rgba(247, 243, 236, 0.8);
}

/* ---------------------------------------------------------- 用量计算器 */
.calc {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: rgba(255, 255, 255, 0.45);
  overflow: hidden;
}

.calc-form {
  padding: clamp(24px, 3vw, 40px);
  display: flex;
  flex-direction: column;
  gap: var(--s4);
}

.field label {
  display: block;
  font-family: var(--serif);
  font-size: 0.74rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--slate-soft);
  margin-bottom: 10px;
}

.seg {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.seg button {
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: transparent;
  padding: 10px 14px;
  cursor: pointer;
  font-size: 0.86rem;
  text-align: left;
  line-height: 1.35;
  transition: border-color 220ms var(--ease), background 220ms var(--ease),
    color 220ms var(--ease);
}

.seg button small {
  display: block;
  font-size: 0.7rem;
  color: var(--slate-soft);
  letter-spacing: 0.06em;
}

.seg button:hover {
  border-color: rgba(20, 20, 15, 0.35);
}

.seg button[aria-pressed='true'] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.seg button[aria-pressed='true'] small {
  color: rgba(247, 243, 236, 0.66);
}

.calc-out {
  border-left: 1px solid var(--line);
  background: var(--paper-deep);
  padding: clamp(24px, 3vw, 40px);
  display: flex;
  flex-direction: column;
  gap: var(--s3);
}

.calc-total {
  font-family: var(--serif);
  font-size: clamp(3.4rem, 7vw, 5rem);
  font-weight: 300;
  line-height: 1;
  letter-spacing: 0.01em;
  font-variant-numeric: tabular-nums;
}

.calc-total span {
  font-size: 0.3em;
  letter-spacing: 0.12em;
  color: var(--slate-soft);
  margin-left: 8px;
}

.calc-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s2);
  border-top: 1px solid var(--hair);
  padding-top: var(--s3);
}

.calc-split div {
  font-size: 0.84rem;
}

.calc-split b {
  display: block;
  font-family: var(--serif);
  font-size: 1.8rem;
  font-weight: 600;
  line-height: 1.3;
}

.calc-split small {
  color: var(--slate-soft);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.68rem;
}

.calc-note {
  font-size: 0.78rem;
  line-height: 1.8;
  color: var(--slate-soft);
  margin-top: auto;
}

/* -------------------------------------------------------------- 时间轴 */
.timeline {
  position: relative;
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: var(--s2);
  margin-top: var(--s5);
}

.timeline::before {
  content: '';
  position: absolute;
  top: 7px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--line);
}

.timeline .track {
  position: absolute;
  top: 7px;
  left: 0;
  height: 1px;
  background: var(--ink);
  width: 0;
  transition: width 480ms var(--ease);
}

.tl-item {
  padding-top: var(--s4);
  cursor: pointer;
  background: none;
  border: 0;
  text-align: left;
  display: block;
}

.tl-item::before {
  content: '';
  position: absolute;
  margin-top: -25px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--paper);
  transition: background 260ms var(--ease), border-color 260ms var(--ease),
    transform 260ms var(--ease);
}

.tl-item[aria-current='true']::before {
  background: var(--ink);
  border-color: var(--ink);
  transform: scale(1.12);
}

.tl-item .when {
  font-family: var(--serif);
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  display: block;
  margin-bottom: 4px;
}

.tl-item .what {
  font-size: 0.98rem;
  display: block;
}

.tl-item .what-en {
  font-family: var(--serif);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--slate-soft);
  display: block;
  margin-top: 2px;
}

.tl-panel {
  margin-top: var(--s5);
  border-top: 1px solid var(--line);
  padding-top: var(--s4);
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr) auto;
  gap: var(--s4);
  align-items: start;
  min-height: 132px;
}

.tl-panel .big {
  font-family: var(--serif);
  font-size: 3rem;
  font-weight: 300;
  line-height: 1;
  color: rgba(20, 20, 15, 0.2);
}

.tl-panel p {
  color: var(--slate);
  max-width: 58ch;
  line-height: 2;
}

/* -------------------------------------------------------- 效果实证 / 对比 */
.compare {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
  aspect-ratio: 3 / 2;
  background: var(--paper-deep);
  touch-action: pan-y;
  user-select: none;
}

.compare.is-empty .handle,
.compare.is-empty .lbl,
.compare.is-empty input {
  display: none;
}

.compare img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.compare .after {
  clip-path: inset(0 0 0 var(--split, 50%));
}

.compare .handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--split, 50%);
  width: 1px;
  background: rgba(247, 243, 236, 0.9);
  box-shadow: 0 0 0 0.5px rgba(20, 20, 15, 0.25);
  pointer-events: none;
}

.compare .handle::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 42px;
  height: 42px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  border: 1px solid rgba(247, 243, 236, 0.9);
  background: rgba(20, 20, 15, 0.28);
  backdrop-filter: blur(3px);
}

.compare input[type='range'] {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
  cursor: ew-resize;
  -webkit-appearance: none;
  appearance: none;
}

.compare .lbl {
  position: absolute;
  bottom: var(--s2);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--paper);
  background: rgba(20, 20, 15, 0.42);
  border-radius: 2px;
  padding: 4px 10px;
  backdrop-filter: blur(3px);
}

.compare .lbl--l {
  left: var(--s2);
}

.compare .lbl--r {
  right: var(--s2);
}

.placeholder-frame {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  gap: 10px;
  text-align: center;
  background:
    linear-gradient(135deg, rgba(231, 224, 212, 0.7), rgba(247, 243, 236, 0.9)),
    repeating-linear-gradient(
      -45deg,
      rgba(20, 20, 15, 0.028) 0 1px,
      transparent 1px 9px
    );
}

.placeholder-frame b {
  font-family: var(--han);
  font-weight: 900;
  font-size: 1.05rem;
}

.placeholder-frame span {
  font-size: 0.78rem;
  color: var(--slate-soft);
  letter-spacing: 0.04em;
}

.evidence-below {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: var(--s4);
  align-items: start;
  margin-top: var(--s4);
}

.evidence-slot {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
  aspect-ratio: 4 / 3;
}

.evidence-slot img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ------------------------------------------------------------ 海报与定价 */
.poster-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--s4);
}

.poster {
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.45);
  display: flex;
  flex-direction: column;
  transition: transform 320ms var(--ease), border-color 320ms var(--ease);
}

.poster:hover {
  transform: translateY(-4px);
  border-color: rgba(20, 20, 15, 0.3);
}

.poster img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  background: var(--paper-deep);
}

.poster-meta {
  padding: var(--s3);
  display: grid;
  gap: 10px;
}

.poster-meta h3 {
  font-family: var(--han);
  font-weight: 900;
  font-size: 1.02rem;
}

.price-list {
  display: grid;
  gap: 6px;
  padding-top: var(--s2);
  border-top: 1px solid var(--hair);
  font-size: 0.86rem;
}

.price-list div {
  display: flex;
  justify-content: space-between;
  gap: var(--s2);
}

.price-list dt,
.price-list span:first-child {
  color: var(--slate-soft);
}

.price-list b {
  font-family: var(--serif);
  font-size: 1.14rem;
  font-weight: 600;
}

.price-missing {
  color: #7d6737;
  font-style: normal;
}

.agency {
  margin-top: var(--s5);
  padding: var(--s4);
  border: 1px dashed rgba(183, 156, 106, 0.6);
  border-radius: var(--r);
  background: rgba(183, 156, 106, 0.06);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--s3);
}

.agency p {
  max-width: 62ch;
  color: var(--slate);
}

/* ---------------------------------------------------------------- 咨询 */
.contact-band {
  background: var(--ink);
  color: var(--paper);
  padding-block: var(--s8);
}

.contact-band .wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(32px, 5vw, 80px);
  align-items: start;
}

.contact-band h2 {
  font-family: var(--han);
  font-weight: 900;
  font-size: clamp(1.7rem, 3.2vw, 2.4rem);
  line-height: 1.35;
}

.contact-band .sub {
  display: block;
  font-family: var(--serif);
  font-size: 0.8rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: rgba(247, 243, 236, 0.55);
  margin-top: var(--s3);
}

.contact-list {
  margin-top: var(--s4);
  display: grid;
  gap: 1px;
  background: var(--line-invert);
  border-top: 1px solid var(--line-invert);
  border-bottom: 1px solid var(--line-invert);
}

.contact-list a,
.contact-list div {
  background: var(--ink);
  padding-block: var(--s3);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s3);
  font-size: 0.92rem;
  transition: padding-left 260ms var(--ease);
}

.contact-list a:hover {
  padding-left: 10px;
}

.contact-list span:first-child {
  color: rgba(247, 243, 236, 0.55);
  font-family: var(--serif);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-size: 0.72rem;
}

.contact-form {
  display: grid;
  gap: var(--s3);
}

.contact-form label {
  display: grid;
  gap: 8px;
}

.contact-form span {
  font-family: var(--serif);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(247, 243, 236, 0.55);
}

.contact-form input,
.contact-form textarea {
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line-invert);
  padding: 10px 0;
  color: var(--paper);
  transition: border-color 220ms var(--ease);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: rgba(247, 243, 236, 0.3);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: 0;
  border-bottom-color: var(--celadon);
}

.contact-band .btn {
  border-color: var(--line-invert);
  color: var(--paper);
  justify-self: start;
}

.contact-band .btn:hover {
  background: var(--paper);
  color: var(--ink);
  border-color: var(--paper);
}

.qr-slot {
  width: 120px;
  height: 120px;
  border: 1px dashed var(--line-invert);
  border-radius: var(--r);
  display: grid;
  place-content: center;
  text-align: center;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: rgba(247, 243, 236, 0.5);
  line-height: 1.6;
}

/* ---------------------------------------------------------------- 页脚 */
.site-foot {
  background: var(--ink);
  color: rgba(247, 243, 236, 0.62);
  padding-bottom: var(--s6);
  font-size: 0.8rem;
  line-height: 1.9;
}

.site-foot .rule {
  background: var(--line-invert);
  margin-bottom: var(--s5);
}

.foot-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 2fr);
  gap: var(--s5);
}

.site-foot img {
  width: 54px;
  margin-bottom: var(--s3);
}

.site-foot .brand-txt b {
  color: var(--paper);
}

.site-foot .brand-txt span {
  color: rgba(247, 243, 236, 0.5);
}

.fineprint p + p {
  margin-top: 10px;
}

.fineprint b {
  color: rgba(247, 243, 236, 0.86);
  font-weight: 400;
}

/* ---------------------------------------------------------- 进场动效 */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 620ms var(--ease), transform 620ms var(--ease);
}

[data-reveal].is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  * {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

/* ------------------------------------------------------------ 响应式 */
@media (max-width: 1080px) {
  .hero-grid,
  .formula,
  .evidence-below,
  .contact-band .wrap {
    grid-template-columns: minmax(0, 1fr);
  }
  .hero-card {
    position: static;
    width: 100%;
    margin-top: var(--s3);
  }
  .specbar {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .specbar div:nth-child(2) {
    border-right: 0;
  }
  .specbar div:nth-child(-n + 2) {
    border-bottom: 1px solid var(--hair);
  }
  .sku-grid,
  .poster-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .timeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    row-gap: var(--s5);
  }
  .timeline::before,
  .timeline .track {
    display: none;
  }
  .tl-item::before {
    position: static;
    margin: 0 0 10px;
    display: block;
  }
  .calc {
    grid-template-columns: minmax(0, 1fr);
  }
  .calc-out {
    border-left: 0;
    border-top: 1px solid var(--line);
  }
}

@media (max-width: 820px) {
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    padding: var(--s2) var(--gutter) var(--s4);
  }
  .nav.is-open {
    display: flex;
  }
  .nav a {
    padding-block: 14px;
    border-bottom: 1px solid var(--hair);
  }
  .nav .btn {
    margin-top: var(--s3);
    align-self: flex-start;
  }
  .nav-toggle {
    display: inline-flex;
  }
  .sku-grid,
  .poster-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .sect-head {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--s3);
  }
  .timeline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .tl-panel {
    grid-template-columns: minmax(0, 1fr);
  }
  .foot-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .section {
    padding-block: var(--s7);
  }
}

@media (max-width: 520px) {
  .specbar,
  .timeline {
    grid-template-columns: minmax(0, 1fr);
  }
  .specbar div {
    border-right: 0;
    border-bottom: 1px solid var(--hair);
  }
  .calc-split {
    grid-template-columns: minmax(0, 1fr);
  }
}