/* ====================================================================
   尔湾云 (erwancdec.forum) — STYLE 62: MOLECULAR GASTRONOMY
   Design Language: Molecular Gastronomy / Culinary Laboratory / Sensory Science
   Visual Personality: 精密、感官化、实验性、探索式美学
   ==================================================================== */

:root {
  /* 实验科学色彩系统 */
  --lab-white: #F4F3EF;          /* 实验室白 (主底色) */
  --lab-surface: #FFFFFF;        /* 标本台纯白 */
  --lab-surface-dim: #ECEAE4;    /* 实验器皿微调灰白 */
  --steel: #B8BEC2;              /* 不锈钢银灰 (精密线框) */
  --steel-light: #DFE3E5;        /* 浅级不锈钢分界线 */
  --graphite: #282B2E;           /* 石墨黑 (主文字、高反差按键) */
  --graphite-soft: #44494E;      /* 次级参数与解析说明 */
  --graphite-muted: #727980;     /* 标本编号与技术元数据 */
  
  /* 食材提取与反应强调色 */
  --deep-olive: #586447;         /* 深橄榄绿 (主交互与平衡基色) */
  --deep-olive-light: #707E5B;   /* 橄榄绿悬停 */
  --citrus-yellow: #E9D45A;      /* 柑橘黄 (主厨招牌推荐标识) */
  --citrus-yellow-soft: #FAF3CD; /* 柑橘浅底 */
  --berry-red: #A63D4B;          /* 浆果红 (焦点刻度与预警微粒) */
  --berry-red-soft: #F5E8EA;     /* 浆果微光 */

  /* 字体栈：系统字体 + 等宽科研标记 */
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "SF Mono", Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  
  --max-width: 1180px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--lab-white);
  color: var(--graphite);
  line-height: 1.7;
  font-feature-settings: "palt", "tnum";
  padding-bottom: 78px;
  background-image: 
    radial-gradient(var(--steel-light) 1px, transparent 1px);
  background-size: 32px 32px;
}

@media (min-width: 769px) {
  body {
    padding-bottom: 0;
  }
}

a {
  color: var(--graphite);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--deep-olive);
}

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

/* 科学排版标尺辅助 */
.mono-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--graphite-muted);
}

.site-container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* 顶部仪器控制台导航 (Header) */
.site-header {
  background-color: rgba(244, 243, 239, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--steel);
  position: sticky;
  top: 0;
  z-index: 90;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--graphite);
  letter-spacing: -0.01em;
}

.brand-logo svg {
  width: 32px;
  height: 32px;
}

.brand-tagline {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--graphite-muted);
  border-left: 1px solid var(--steel);
  padding-left: 10px;
  margin-left: 2px;
  display: none;
}

@media (min-width: 992px) {
  .brand-tagline {
    display: inline-block;
  }
}

.main-nav {
  display: flex;
  align-items: center;
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 26px;
}

.nav-links a {
  font-size: 0.9rem;
  color: var(--graphite-soft);
  font-weight: 500;
  position: relative;
  padding-bottom: 4px;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--graphite);
}

.nav-links a.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--deep-olive);
}

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

.mobile-toggle {
  display: none;
  background: var(--lab-surface);
  border: 1px solid var(--steel);
  padding: 8px 12px;
  cursor: pointer;
  color: var(--graphite);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

/* ====================================================================
   BUTTONS (精确分子实验操作钮)
   CTA STATIC / HOVER / CLICK 规范执行
   ==================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0 28px;
  height: 54px;
  border-radius: 2px;
  border: 1px solid var(--graphite);
  cursor: pointer;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  transition: background-color 220ms ease, color 220ms ease, border-color 220ms ease, transform 120ms ease;
  font-family: var(--font-sans);
}

/* 主操作按钮：Graphite 背景、White 文字、54px 高、无大圆角 */
.btn-primary {
  background-color: var(--graphite);
  color: #FFFFFF !important;
  border-color: var(--graphite);
}

.btn-primary .btn-arrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  line-height: 1;
  transition: transform 220ms ease;
}

/* CTA Hover：边框向两侧展开、背景切为 Deep Olive、Arrow 延伸、下方精细刻度线 */
.btn-primary::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background-color: var(--citrus-yellow);
  transition: width 220ms ease;
}

.btn-primary:hover {
  background-color: var(--deep-olive);
  border-color: var(--deep-olive);
}

.btn-primary:hover .btn-arrow {
  transform: translateX(4px);
}

.btn-primary:hover::after {
  width: 80%;
}

/* CTA Click 状态 */
.btn-primary:active {
  transform: scale(0.985);
}

/* 次级按钮：Stainless Steel 细框白底 */
.btn-secondary {
  background-color: var(--lab-surface);
  color: var(--graphite) !important;
  border: 1px solid var(--steel);
}

.btn-secondary:hover {
  background-color: var(--lab-surface-dim);
  border-color: var(--graphite);
}

.btn-sm {
  height: 40px;
  padding: 0 18px;
  font-size: 0.85rem;
}

/* ====================================================================
   HERO SECTION (分子实验主控台)
   左侧：核心价值主张与双语精密排版
   右侧：超近距离分子微观结构透镜 + 01 INGREDIENT / 02 PROCESS / 03 RESULT
   ==================================================================== */
.hero-section {
  padding: 72px 0 60px;
  border-bottom: 1px solid var(--steel);
  position: relative;
  background: linear-gradient(180deg, rgba(255,255,255,0.7) 0%, rgba(244,243,239,0.9) 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-left {
  display: flex;
  flex-direction: column;
}

.hero-annotation-code {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.hero-annotation-code .badge-specimen {
  background-color: var(--graphite);
  color: var(--lab-white);
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  border-radius: 1px;
}

.hero-headline-en {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--deep-olive);
  text-transform: uppercase;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-headline-en::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 1px;
  background-color: var(--deep-olive);
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--graphite);
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--graphite-soft);
  line-height: 1.7;
  margin-bottom: 34px;
  max-width: 580px;
  border-left: 2px solid var(--steel);
  padding-left: 16px;
}

.hero-ctas {
  display: flex;
  gap: 16px;
  margin-bottom: 36px;
}

.hero-metrics-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  padding-top: 24px;
  border-top: 1px dashed var(--steel);
}

.metric-item {
  display: flex;
  flex-direction: column;
}

.metric-num {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--graphite);
}

.metric-label {
  font-size: 0.78rem;
  color: var(--graphite-muted);
}

/* 右侧宏观分子标本容器 */
.hero-right {
  position: relative;
}

.specimen-lens-container {
  background-color: var(--lab-surface);
  border: 1px solid var(--steel);
  border-radius: 4px;
  padding: 30px;
  position: relative;
  box-shadow: 0 10px 30px rgba(40, 43, 46, 0.04);
}

.lens-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--steel-light);
  padding-bottom: 12px;
  margin-bottom: 20px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--graphite-muted);
}

.lens-center-visual {
  width: 100%;
  height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background-color: #FAFAF7;
  border: 1px solid var(--steel-light);
  overflow: hidden;
}

.macro-svg-chamber {
  width: 100%;
  height: 100%;
}

/* 标本室外围科学标注 01 INGREDIENT / 02 PROCESS / 03 RESULT */
.lens-triad-labels {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--steel-light);
}

.triad-box {
  display: flex;
  flex-direction: column;
  font-family: var(--font-mono);
}

.triad-code {
  font-size: 0.7rem;
  color: var(--deep-olive);
  font-weight: 700;
  margin-bottom: 2px;
}

.triad-name {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--graphite);
  font-family: var(--font-sans);
}

.triad-detail {
  font-size: 0.72rem;
  color: var(--graphite-muted);
  line-height: 1.4;
  margin-top: 2px;
}

/* ====================================================================
   SCROLL EXPERIMENT FLOW (五步实验演进叙事)
   01 MATERIAL -> 02 PROCESS -> 03 TRANSFORMATION -> 04 RESULT -> 05 EXPERIENCE
   ==================================================================== */
.experiment-flow-section {
  padding: 72px 0;
  border-bottom: 1px solid var(--steel);
}

.section-pretitle {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--deep-olive);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 8px;
  display: block;
}

.section-heading-wrap {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 48px;
}

.section-main-title {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--graphite);
  letter-spacing: -0.01em;
  margin-bottom: 10px;
}

.section-main-desc {
  font-size: 0.95rem;
  color: var(--graphite-soft);
  line-height: 1.65;
}

.flow-step-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.flow-step-card {
  background-color: var(--lab-surface);
  border: 1px solid var(--steel);
  border-radius: 2px;
  padding: 24px 28px;
  display: grid;
  grid-template-columns: 160px 1fr 180px;
  gap: 24px;
  align-items: center;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.flow-step-card:hover {
  border-color: var(--graphite);
  background-color: #FFFFFF;
}

.flow-step-index {
  display: flex;
  flex-direction: column;
}

.flow-step-num {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--deep-olive);
  letter-spacing: 0.05em;
}

.flow-step-stage {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--graphite-muted);
}

.flow-step-body h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--graphite);
  margin-bottom: 4px;
}

.flow-step-body p {
  font-size: 0.9rem;
  color: var(--graphite-soft);
  line-height: 1.6;
}

.flow-step-spec {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-align: right;
  color: var(--graphite-soft);
  border-left: 1px solid var(--steel-light);
  padding-left: 16px;
}

.flow-step-spec strong {
  display: block;
  font-size: 0.95rem;
  color: var(--graphite);
}

/* ====================================================================
   LABORATORY SPECIMEN CARDS (实验标本卡片)
   编号 / 材料与功能名称 / 微观视觉 / 关键作用 / 结果说明
   ==================================================================== */
.specimen-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.specimen-card {
  background-color: var(--lab-surface);
  border: 1px solid var(--steel);
  border-radius: 2px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 240ms ease, border-color 240ms ease, box-shadow 240ms ease;
}

.specimen-card:hover {
  border-color: var(--graphite);
  box-shadow: 0 8px 24px rgba(40, 43, 46, 0.06);
}

.specimen-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--steel-light);
  padding-bottom: 10px;
}

.specimen-id {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--deep-olive);
}

.specimen-state {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--citrus-yellow);
  box-shadow: 0 0 0 2px rgba(233, 212, 90, 0.3);
}

.specimen-visual-frame {
  height: 120px;
  background-color: #FAF9F5;
  border: 1px solid var(--steel-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  position: relative;
  overflow: hidden;
}

.specimen-card:hover .specimen-visual-frame svg {
  transform: scale(1.08);
  transition: transform 300ms ease;
}

.specimen-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--graphite);
  margin-bottom: 8px;
}

.specimen-role {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--deep-olive);
  margin-bottom: 8px;
}

.specimen-result {
  font-size: 0.88rem;
  color: var(--graphite-soft);
  line-height: 1.6;
  margin-bottom: 16px;
  flex-grow: 1;
}

.specimen-data-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 12px;
  border-top: 1px dashed var(--steel-light);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--graphite-muted);
}

.specimen-data-row span:last-child {
  color: var(--graphite);
  font-weight: 700;
}

/* ====================================================================
   感官矩阵：流媒体与 AI 实验提纯
   ==================================================================== */
.sensory-matrix {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.sensory-chamber {
  background-color: var(--lab-surface);
  border: 1px solid var(--steel);
  padding: 32px 28px;
  position: relative;
}

.sensory-chamber-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.chamber-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--berry-red);
  background-color: var(--berry-red-soft);
  padding: 3px 8px;
  border-radius: 1px;
}

.sensory-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--graphite);
  margin-bottom: 10px;
}

.sensory-desc {
  font-size: 0.9rem;
  color: var(--graphite-soft);
  line-height: 1.65;
  margin-bottom: 20px;
}

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

.chem-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 4px 10px;
  background-color: var(--lab-white);
  border: 1px solid var(--steel);
  color: var(--graphite);
  border-radius: 1px;
}

/* ====================================================================
   使用场景：SENSORY LAB SCENARIOS (3 Cards)
   ==================================================================== */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.lab-scenario-card {
  background-color: var(--lab-surface);
  border: 1px solid var(--steel);
  border-top: 3px solid var(--graphite);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
}

.scenario-phase {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--deep-olive);
  margin-bottom: 8px;
  font-weight: 700;
}

.scenario-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--graphite);
  margin-bottom: 8px;
}

.device-specimen-badge {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--graphite-soft);
  background-color: var(--lab-surface-dim);
  border: 1px solid var(--steel-light);
  padding: 4px 10px;
  align-self: flex-start;
  margin-bottom: 14px;
}

.scenario-text {
  font-size: 0.9rem;
  color: var(--graphite-soft);
  line-height: 1.65;
}

/* ====================================================================
   PRICING: TASTING MENU (赏味试吃菜单式定价)
   ESSENTIAL / SIGNATURE (Citrus Yellow 标识) / EXPERIMENTAL
   ==================================================================== */
.tasting-menu-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.menu-card {
  background-color: var(--lab-surface);
  border: 1px solid var(--steel);
  border-radius: 2px;
  padding: 36px 28px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
}

/* 推荐套餐：使用 Citrus Yellow #E9D45A 标识 */
.menu-card.signature {
  border: 2px solid var(--graphite);
  background-color: #FFFFFF;
  box-shadow: 0 12px 32px rgba(40, 43, 46, 0.08);
}

.signature-ribbon {
  position: absolute;
  top: -14px;
  left: 28px;
  background-color: var(--citrus-yellow);
  color: var(--graphite);
  border: 1px solid var(--graphite);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 800;
  padding: 2px 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.menu-tier-en {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--graphite-muted);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.menu-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--graphite);
  margin-bottom: 4px;
}

.menu-target {
  font-size: 0.85rem;
  color: var(--graphite-soft);
  margin-bottom: 20px;
}

.menu-price-block {
  display: flex;
  align-items: baseline;
  gap: 4px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--steel-light);
  margin-bottom: 24px;
}

.menu-currency {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--graphite);
}

.menu-price {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--graphite);
  line-height: 1;
}

.menu-cycle {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--graphite-muted);
}

.menu-ingredients-list {
  list-style: none;
  margin-bottom: 28px;
  flex-grow: 1;
}

.menu-ingredients-list li {
  font-size: 0.9rem;
  color: var(--graphite-soft);
  margin-bottom: 12px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.5;
}

.menu-ingredients-list li::before {
  content: "—";
  color: var(--deep-olive);
  font-family: var(--font-mono);
  font-weight: 700;
}

.menu-card .btn {
  width: 100%;
}

/* ====================================================================
   FAQ SECTION (实验疑难核查)
   ==================================================================== */
.faq-box-wrap {
  max-width: 820px;
  margin: 0 auto;
}

.lab-faq-item {
  background-color: var(--lab-surface);
  border: 1px solid var(--steel);
  margin-bottom: 12px;
  border-radius: 2px;
}

.faq-trigger-btn {
  width: 100%;
  padding: 18px 22px;
  background: none;
  border: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--graphite);
  cursor: pointer;
  text-align: left;
}

.faq-trigger-btn .faq-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--deep-olive);
  margin-right: 12px;
}

.faq-cross-icon {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--graphite-muted);
  transition: transform 200ms ease;
}

.lab-faq-item.open .faq-cross-icon {
  transform: rotate(45deg);
  color: var(--berry-red);
}

.faq-content-drawer {
  display: none;
  padding: 0 22px 20px;
  font-size: 0.92rem;
  color: var(--graphite-soft);
  line-height: 1.7;
  border-top: 1px dashed var(--steel-light);
  margin-top: 4px;
  padding-top: 16px;
}

.lab-faq-item.open .faq-content-drawer {
  display: block;
}

/* ====================================================================
   FINAL CTA: THE RESULT IS IN THE DETAILS
   ==================================================================== */
.final-lab-cta {
  padding: 80px 0;
  background-color: var(--graphite);
  color: #FFFFFF;
  border-top: 1px solid var(--steel);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.final-lab-cta::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--citrus-yellow), var(--deep-olive), var(--berry-red));
}

.final-cta-en-pre {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  letter-spacing: 0.16em;
  color: var(--citrus-yellow);
  text-transform: uppercase;
  margin-bottom: 12px;
  display: block;
}

.final-cta-title {
  font-size: 2.1rem;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 14px;
}

.final-cta-desc {
  font-size: 1.05rem;
  color: var(--steel);
  max-width: 620px;
  margin: 0 auto 32px;
  line-height: 1.65;
}

.final-lab-cta .btn-primary {
  background-color: #FFFFFF;
  color: var(--graphite) !important;
  border-color: #FFFFFF;
}

.final-lab-cta .btn-primary:hover {
  background-color: var(--citrus-yellow);
  border-color: var(--citrus-yellow);
  color: var(--graphite) !important;
}

/* ====================================================================
   MOBILE BOTTOM BAR (移动端吸底)
   ==================================================================== */
.mobile-bottom-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: rgba(244, 243, 239, 0.98);
  border-top: 1px solid var(--steel);
  padding: 10px 18px;
  z-index: 99;
  backdrop-filter: blur(8px);
}

.mobile-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  max-width: 480px;
  margin: 0 auto;
}

.mobile-bottom-info strong {
  display: block;
  font-size: 0.95rem;
  color: var(--graphite);
}

.mobile-bottom-info span {
  font-size: 0.78rem;
  color: var(--graphite-muted);
  font-family: var(--font-mono);
}

/* ====================================================================
   FOOTER (仪器仪表级实验室页脚)
   ==================================================================== */
.site-footer {
  background-color: var(--lab-surface-dim);
  border-top: 1px solid var(--steel);
  padding: 56px 0 28px;
  font-size: 0.88rem;
  color: var(--graphite-soft);
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 40px;
}

.footer-brand-summary {
  margin-top: 14px;
  line-height: 1.65;
  max-width: 420px;
  color: var(--graphite-soft);
}

.footer-heading {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  color: var(--graphite);
  margin-bottom: 16px;
  text-transform: uppercase;
}

.footer-links-list {
  list-style: none;
}

.footer-links-list li {
  margin-bottom: 9px;
}

.footer-links-list a {
  color: var(--graphite-soft);
}

.footer-links-list a:hover {
  color: var(--graphite);
}

.footer-bottom-row {
  border-top: 1px solid var(--steel);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--graphite-muted);
}

.footer-disclaimer-legal {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--graphite-muted);
  line-height: 1.5;
  width: 100%;
}

/* ====================================================================
   ARTICLE & POLICY PAGE STYLES (内容页与政策页精修)
   ==================================================================== */
.article-header-panel {
  padding: 44px 0 28px;
  border-bottom: 1px solid var(--steel);
  background-color: var(--lab-surface);
  margin-bottom: 36px;
}

.article-title-main {
  font-size: 2.1rem;
  font-weight: 800;
  line-height: 1.3;
  color: var(--graphite);
  margin-bottom: 14px;
}

.article-metadata-strip {
  display: flex;
  gap: 20px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--graphite-muted);
}

.article-body-sheet {
  max-width: 860px;
  margin: 0 auto 56px;
  background-color: var(--lab-surface);
  border: 1px solid var(--steel);
  padding: 44px 48px;
}

.article-body-sheet h2 {
  font-size: 1.45rem;
  color: var(--graphite);
  margin-top: 40px;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--steel-light);
}

.article-body-sheet h3 {
  font-size: 1.15rem;
  color: var(--graphite);
  margin-top: 24px;
  margin-bottom: 10px;
}

.article-body-sheet p {
  margin-bottom: 18px;
  line-height: 1.8;
  color: var(--graphite-soft);
}

.article-body-sheet ul,
.article-body-sheet ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

.article-body-sheet li {
  margin-bottom: 8px;
  line-height: 1.7;
}

.article-cta-box {
  background-color: #FAFAF7;
  border: 1px solid var(--graphite);
  padding: 28px;
  text-align: center;
  margin: 38px 0;
  position: relative;
}

.article-cta-box::before {
  content: "实验优选方案";
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--graphite);
  color: #FFFFFF;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  padding: 2px 10px;
}

.article-cta-box h3 {
  font-size: 1.25rem;
  color: var(--graphite);
  margin-top: 4px;
  margin-bottom: 8px;
}

.article-cta-box p {
  font-size: 0.95rem;
  color: var(--graphite-soft);
  margin-bottom: 18px;
}

.article-interlinks {
  background-color: var(--lab-white);
  border: 1px solid var(--steel);
  padding: 20px 24px;
  margin-top: 36px;
}

.article-interlinks h4 {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--graphite);
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}

.article-interlinks ul {
  list-style: none;
  padding-left: 0;
  margin-bottom: 0;
}

.article-interlinks li {
  margin-bottom: 8px;
}

/* 面包屑导航 */
.breadcrumb-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--graphite-muted);
  margin-bottom: 16px;
}

.breadcrumb-bar a {
  color: var(--graphite-soft);
}

.breadcrumb-bar a:hover {
  color: var(--deep-olive);
}

/* 指南卡片网格 (zhinan.html) */
.guide-card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 44px;
}

.guide-card {
  background-color: var(--lab-surface);
  border: 1px solid var(--steel);
  border-radius: 2px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s ease;
}

.guide-card:hover {
  border-color: var(--graphite);
}

.guide-thumb {
  width: 100%;
  height: 120px;
  background-color: #FAF9F5;
  border: 1px solid var(--steel-light);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.guide-card-meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--graphite-muted);
  margin-bottom: 8px;
}

.guide-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--graphite);
  margin-bottom: 10px;
  line-height: 1.4;
}

.guide-card-excerpt {
  font-size: 0.9rem;
  color: var(--graphite-soft);
  line-height: 1.65;
  margin-bottom: 18px;
  flex-grow: 1;
}

/* 政策页白皮书版式 */
.whitepaper-sheet {
  max-width: 860px;
  margin: 44px auto 64px;
  background-color: var(--lab-surface);
  border: 1px solid var(--steel);
  padding: 48px;
}

.whitepaper-sheet h1 {
  font-size: 2rem;
  color: var(--graphite);
  margin-bottom: 10px;
}

.whitepaper-sheet .doc-audit-stamp {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--graphite-muted);
  border-bottom: 1px solid var(--steel-light);
  padding-bottom: 18px;
  margin-bottom: 28px;
}

.whitepaper-sheet h2 {
  font-size: 1.3rem;
  color: var(--graphite);
  margin-top: 32px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--steel-light);
  padding-bottom: 6px;
}

.whitepaper-sheet p {
  margin-bottom: 14px;
  line-height: 1.75;
  color: var(--graphite-soft);
}

.whitepaper-sheet ul {
  margin-bottom: 18px;
  padding-left: 20px;
}

.whitepaper-sheet li {
  margin-bottom: 6px;
}

/* 焦点可见性与无障碍支持 */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--deep-olive);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ====================================================================
   RESPONSIVE DESIGN (移动端自适应)
   ==================================================================== */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .flow-step-card {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .flow-step-spec {
    border-left: none;
    padding-left: 0;
    text-align: left;
    border-top: 1px dashed var(--steel-light);
    padding-top: 10px;
  }

  .specimen-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .sensory-matrix {
    grid-template-columns: 1fr;
  }

  .tasting-menu-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }

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

  .guide-card-grid {
    grid-template-columns: 1fr;
  }

  .footer-top-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

@media (max-width: 768px) {
  .header-actions .btn {
    display: none;
  }

  .mobile-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    min-width: 64px;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background-color: var(--lab-surface);
    border-bottom: 1px solid var(--steel);
    padding: 20px 24px;
    flex-direction: column;
    align-items: flex-start;
  }

  .main-nav.active {
    display: flex;
  }

  .nav-links {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    gap: 16px;
  }

  .hero-title {
    font-size: 1.95rem;
  }

  .hero-ctas {
    flex-direction: column;
  }

  .hero-ctas .btn {
    width: 100%;
  }

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

  .mobile-bottom-bar.is-visible {
    display: block;
  }

  .article-body-sheet,
  .whitepaper-sheet {
    padding: 24px 18px;
  }
}