/* ============================================================
   WeKang 双会官方网站 V3.0 — 全局样式
   配色：暖白60% / 铜棕25% / 香槟金10% / 微康红5%(仅CTA)
   视觉：专业、温暖、克制、可信 + 微生态视觉符号
   架构：5幕叙事驱动 (Hook→Explore→Decide→Act→Support)
   ============================================================ */

/* ---------- CSS 变量 ---------- */
:root {
  /* 品牌色板 */
  --brand-red: #D71920;
  --brand-red-dark: #A91218;
  --copper: #A66B46;
  --copper-dark: #533126;
  --champagne: #D8B47A;
  --warm-bg: #F5F0E9;
  --paper: #FFFDF9;
  --surface: #FFFFFF;
  --ink: #211B18;
  --text-secondary: #6F625B;
  --text-light: #978A82;
  --border: #E5D8CC;

  /* 微生态视觉色板 */
  --microbe-glow: rgba(166, 107, 70, 0.08);
  --microbe-cell-1: rgba(216, 180, 122, 0.15);
  --microbe-cell-2: rgba(166, 107, 70, 0.10);
  --microbe-cell-3: rgba(83, 49, 38, 0.06);
  --microbe-accent: rgba(216, 180, 122, 0.25);
  --dna-light: rgba(216, 180, 122, 0.4);
  --dna-dark: rgba(166, 107, 70, 0.3);

  /* 布局 */
  --max-width: 1200px;
  --reading-width: 740px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 999px;
  --nav-height: 68px;
  --persona-bar-height: 48px;

  /* 字体 */
  --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
  --font-mono: "SF Mono", "Cascadia Code", "Consolas", monospace;

  /* 阴影 */
  --shadow-card: 0 1px 3px rgba(83, 49, 38, 0.06);
  --shadow-elevated: 0 4px 16px rgba(83, 49, 38, 0.08);
  --transition: 0.25s ease;
}

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + var(--persona-bar-height));
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--warm-bg);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

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

a {
  color: var(--copper);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover {
  color: var(--copper-dark);
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--ink);
}

/* ---------- prefers-reduced-motion ---------- */
@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;
  }
}

/* ---------- Utility ---------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.reading-width {
  max-width: var(--reading-width);
  margin-left: auto;
  margin-right: auto;
}

/* ---------- Section ---------- */
.section {
  padding: 80px 0;
  position: relative;
}
.section__label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: 8px;
}
.section__title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 12px;
}
.section__subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: var(--reading-width);
}
.section__subtitle--center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}
.section--surface {
  background: var(--surface);
}
.section--flush {
  padding-left: 0;
  padding-right: 0;
}
.section--flush .section__header {
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding: 0 24px 0 24px;
}
.section--dark {
  background: var(--copper-dark);
  color: rgba(255, 255, 255, 0.9);
}
.section--dark .section__title {
  color: #fff;
}
.section--dark .section__subtitle {
  color: rgba(255, 255, 255, 0.7);
}

/* ---------- 幕标识 (Act Marker) ---------- */
.act-marker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: 16px;
  opacity: 0.7;
}
.act-marker::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--copper);
  opacity: 0.4;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: var(--radius-pill);
  transition: all var(--transition);
  border: 2px solid transparent;
  white-space: nowrap;
}
.btn--primary {
  background: var(--brand-red);
  color: #fff;
  border-color: var(--brand-red);
}
.btn--primary:hover {
  background: var(--brand-red-dark);
  border-color: var(--brand-red-dark);
  color: #fff;
}
.btn--outline {
  background: transparent;
  color: var(--copper-dark);
  border-color: var(--copper);
}
.btn--outline:hover {
  background: var(--copper);
  color: #fff;
}
.btn--white-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.5);
}
.btn--white-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
  color: #fff;
}
.btn--text {
  padding: 8px 0;
  border: none;
  color: var(--copper);
  font-weight: 600;
}
.btn--text:hover {
  color: var(--copper-dark);
}
.btn--text::after {
  content: " →";
  transition: transform var(--transition);
}
.btn--text:hover::after {
  transform: translateX(4px);
}

/* ---------- Card ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-card);
}
.card--hover:hover {
  box-shadow: var(--shadow-elevated);
  border-color: var(--champagne);
}

/* ---------- Badge / Tag ---------- */
.tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: var(--warm-bg);
  color: var(--copper);
  border: 1px solid var(--border);
}
.tag--active {
  background: var(--copper);
  color: #fff;
  border-color: var(--copper);
}

/* ============================================================
   微生态视觉系统 (Microbiome Visual System)
   ============================================================ */

/* --- 浮动益生菌细胞 --- */
.microbe-cells {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}

.microbe-cell {
  position: absolute;
  border-radius: 50%;
  opacity: 0;
}

/* 大细胞 — 半透明香槟金，有机边缘 */
.microbe-cell--lg {
  width: 120px;
  height: 120px;
  background: radial-gradient(circle at 35% 35%, var(--microbe-cell-1), transparent 70%);
  border: 1px solid rgba(216, 180, 122, 0.15);
}
.microbe-cell--lg::after {
  content: "";
  position: absolute;
  inset: 15%;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 40%, rgba(166, 107, 70, 0.12), transparent 60%);
}

/* 中细胞 — 铜棕光晕 */
.microbe-cell--md {
  width: 60px;
  height: 60px;
  background: radial-gradient(circle at 30% 30%, var(--microbe-cell-2), transparent 70%);
  border: 1px solid rgba(166, 107, 70, 0.1);
}

/* 小细胞/CFU — 密集点状，模拟菌落计数 */
.microbe-cell--sm {
  width: 24px;
  height: 24px;
  background: radial-gradient(circle at 40% 40%, var(--microbe-cell-3), transparent 70%);
}

@media (prefers-reduced-motion: no-preference) {
  .microbe-cell {
    animation: float-cell var(--float-dur, 12s) ease-in-out infinite;
    animation-delay: var(--float-delay, 0s);
  }
}

@keyframes float-cell {
  0%, 100% {
    transform: translate(0, 0) scale(1);
    opacity: 0.3;
  }
  25% {
    transform: translate(var(--drift-x, 15px), var(--drift-y, -20px)) scale(1.05);
    opacity: 0.5;
  }
  50% {
    transform: translate(calc(var(--drift-x, 15px) * -0.5), var(--drift-y, -20px)) scale(0.95);
    opacity: 0.25;
  }
  75% {
    transform: translate(calc(var(--drift-x, 15px) * 0.7), calc(var(--drift-y, -20px) * -0.3)) scale(1.02);
    opacity: 0.4;
  }
}

/* --- DNA 螺旋装饰分隔线 --- */
.dna-divider {
  position: relative;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: visible;
  margin: 0 auto;
  max-width: 300px;
}
.dna-divider::before {
  content: "";
  position: absolute;
  left: 10%;
  right: 10%;
  top: 50%;
  height: 1px;
  background: var(--border);
}
.dna-strand {
  position: relative;
  width: 200px;
  height: 24px;
  background: var(--surface);
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}
.dna-node {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--copper);
  opacity: 0.4;
  position: relative;
}
.dna-node::before,
.dna-node::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 1px;
  background: var(--champagne);
  opacity: 0.3;
}
.dna-node::before {
  left: -16px;
  top: 50%;
  transform: rotate(-35deg);
}
.dna-node::after {
  right: -16px;
  top: 50%;
  transform: rotate(35deg);
}

/* --- 微观菌落点状背景 --- */
.bg-micro-dots {
  position: relative;
}
.bg-micro-dots::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 10% 20%, rgba(166, 107, 70, 0.04) 1px, transparent 1px),
    radial-gradient(circle at 30% 60%, rgba(216, 180, 122, 0.05) 1.5px, transparent 1.5px),
    radial-gradient(circle at 70% 15%, rgba(166, 107, 70, 0.03) 1px, transparent 1px),
    radial-gradient(circle at 85% 75%, rgba(83, 49, 38, 0.04) 1.5px, transparent 1.5px),
    radial-gradient(circle at 50% 85%, rgba(216, 180, 122, 0.04) 1px, transparent 1px);
  background-size: 200px 200px, 300px 300px, 250px 250px, 180px 180px, 220px 220px;
  pointer-events: none;
  z-index: 0;
}

/* --- 肠道绒毛波浪分隔 --- */
.villi-wave {
  position: relative;
  height: 0;
}
.villi-wave::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -40px;
  height: 40px;
  background:
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 40px,
      rgba(166, 107, 70, 0.06) 40px,
      rgba(166, 107, 70, 0.06) 42px
    );
  mask-image: linear-gradient(to top, rgba(0,0,0,0.3), transparent);
  -webkit-mask-image: linear-gradient(to top, rgba(0,0,0,0.3), transparent);
}

/* --- 细胞膜纹理边框 --- */
.membrane-border {
  position: relative;
}
.membrane-border::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--champagne) 20%,
    var(--copper) 50%,
    var(--champagne) 80%,
    transparent 100%
  );
  opacity: 0.3;
}

/* ============================================================
   1. 粘性岗位上下文指示器 #persona-context-bar
   ============================================================ */
.persona-context-bar {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  z-index: 999;
  height: 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
  transition: height 0.35s ease, padding 0.35s ease;
  box-shadow: 0 2px 8px rgba(83,49,38,0.04);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}
.persona-context-bar--visible {
  height: var(--persona-bar-height);
  padding: 0 24px;
}
.persona-context-bar__text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}
.persona-context-bar__persona {
  font-weight: 700;
  color: var(--copper);
}
.persona-context-bar__sep {
  color: var(--text-light);
  font-size: 0.8rem;
}
.persona-context-bar__link {
  font-size: 0.82rem;
  color: var(--copper);
  font-weight: 600;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.persona-context-bar__link:hover {
  color: var(--copper-dark);
}
.persona-context-bar__clear {
  font-size: 0.78rem;
  color: var(--text-light);
  cursor: pointer;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.persona-context-bar__clear:hover {
  color: var(--brand-red);
  border-color: var(--brand-red);
}

/* ============================================================
   2. 导航 #main-nav
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: rgba(255, 253, 249, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}
.nav__logo {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  flex-shrink: 0;
}
.nav__logo-zh {
  font-size: 1.3rem;
}
.nav__logo-en {
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
}
.nav__links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav__link {
  font-size: 0.88rem;
  color: var(--text-secondary);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  text-decoration: none;
}
.nav__link:hover {
  color: var(--ink);
  background: var(--warm-bg);
}
.nav__link--active {
  color: var(--copper);
  font-weight: 600;
}
.nav__cta {
  margin-left: 12px;
}
.nav__toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
}
.nav__toggle-icon {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink);
  position: relative;
  transition: background var(--transition);
}
.nav__toggle-icon::before,
.nav__toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: var(--ink);
  transition: transform var(--transition);
}
.nav__toggle-icon::before { top: -6px; }
.nav__toggle-icon::after { top: 6px; }
.nav__toggle[aria-expanded="true"] .nav__toggle-icon {
  background: transparent;
}
.nav__toggle[aria-expanded="true"] .nav__toggle-icon::before {
  transform: translateY(6px) rotate(45deg);
}
.nav__toggle[aria-expanded="true"] .nav__toggle-icon::after {
  transform: translateY(-6px) rotate(-45deg);
}

/* ============================================================
   3. Hero #hero (第1幕：情感钩子)
   ============================================================ */
.hero {
  background: var(--copper-dark);
  color: #fff;
  padding: 140px 0 100px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

/* Hero背景图：益生菌3D渲染 — 虚化+透明+品牌色叠加 */
.hero__bg-layer {
  position: absolute;
  inset: -20px; /* 稍微放大避免边缘露白 */
  z-index: 0;
  background-image: url('../assets/hero-microbe-bg.jpg');
  background-size: cover;
  background-position: center 30%;
  background-repeat: no-repeat;
  /* 虚化：高斯模糊6px，营造微观景深感 */
  filter: blur(6px);
  /* 缩放120%：补偿模糊导致的边缘收缩 */
  transform: scale(1.2);
  /* 透明度提至60%：背景菌体轮廓清晰可见，同时保留景深感 */
  opacity: 0.6;
}
/* 品牌色叠加遮罩：降低alpha让背景图透出，保留文字可读性 */
.hero__bg-layer::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(83, 49, 38, 0.55) 0%,
    rgba(83, 49, 38, 0.35) 40%,
    rgba(83, 49, 38, 0.45) 70%,
    rgba(166, 107, 70, 0.50) 100%
  );
}

/* Hero区微生态细胞装饰 — 在背景图之上 */
.hero__microbes {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}
.hero__microbe {
  position: absolute;
  border-radius: 50%;
  opacity: 0.06;
  background: var(--champagne);
}
.hero__microbe:nth-child(1) { width: 300px; height: 300px; top: -80px; right: -60px; }
.hero__microbe:nth-child(2) { width: 180px; height: 180px; bottom: -40px; left: 10%; opacity: 0.04; }
.hero__microbe:nth-child(3) { width: 80px; height: 80px; top: 30%; left: 15%; opacity: 0.08; }
.hero__microbe:nth-child(4) { width: 60px; height: 60px; top: 20%; right: 25%; opacity: 0.05; }
.hero__microbe:nth-child(5) { width: 120px; height: 120px; bottom: 20%; right: 20%; opacity: 0.04; }

.hero > .container {
  position: relative;
  z-index: 2;
}

.hero__overline {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--champagne);
  margin-bottom: 16px;
}
.hero__title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.25;
  margin-bottom: 12px;
}
.hero__subtitle {
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  color: rgba(255, 255, 255, 0.85);
  font-weight: 500;
  margin-bottom: 8px;
}
.hero__desc {
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.7);
  max-width: 680px;
  margin: 0 auto 40px;
  line-height: 1.7;
}
.hero__date {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--champagne);
  margin-bottom: 0;
}
.hero__stats {
  display: flex;
  justify-content: center;
  gap: 0;
  max-width: var(--max-width);
  margin: 0 auto 40px;
  flex-wrap: wrap;
}
.hero__stat {
  flex: 1;
  min-width: 140px;
  padding: 20px 16px;
  border-right: 1px solid rgba(255, 255, 255, 0.15);
  text-align: center;
}
.hero__stat:last-child {
  border-right: none;
}
.hero__stat-value {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--champagne);
  line-height: 1.2;
  margin-bottom: 4px;
}
.hero__stat-label {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.65);
}
.hero__ctas {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.hero__aux-link {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  transition: color var(--transition);
}
.hero__aux-link:hover {
  color: var(--champagne);
}

/* Hero底部的微观暗示箭头 */
.hero__scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  opacity: 0.5;
}
.hero__scroll-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: rgba(255,255,255,0.5);
}
@media (prefers-reduced-motion: no-preference) {
  .hero__scroll-dot {
    animation: scroll-pulse 2s ease-in-out infinite;
  }
  .hero__scroll-dot:nth-child(2) { animation-delay: 0.2s; }
  .hero__scroll-dot:nth-child(3) { animation-delay: 0.4s; }
}
@keyframes scroll-pulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.8; }
}

/* Hero背景图缓慢呼吸：模拟微生物浮动感 */
@media (prefers-reduced-motion: no-preference) {
  .hero__bg-layer {
    animation: hero-bg-breathe 12s ease-in-out infinite;
  }
}
@keyframes hero-bg-breathe {
  0%, 100% { opacity: 0.55; transform: scale(1.2) translate(0, 0); }
  50% { opacity: 0.65; transform: scale(1.22) translate(-6px, -4px); }
}

/* ============================================================
   4. 微生态视觉叙事区 #microbiome-narrative (第1幕·新)
   ============================================================ */
.microbiome-narrative {
  padding: 100px 0;
  position: relative;
  overflow: hidden;
  background: var(--surface);
}
.microbiome-narrative__cells {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}
.microbiome-narrative > .container {
  position: relative;
  z-index: 1;
}

.microbiome-narrative__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

/* 左侧文字 */
.microbiome-narrative__text {
  max-width: 480px;
}
.microbiome-narrative__kicker {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: 12px;
}
.microbiome-narrative__heading {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 16px;
  line-height: 1.35;
}
.microbiome-narrative__body {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 24px;
}
.microbiome-narrative__facts {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}
.microbiome-narrative__fact {
  display: flex;
  flex-direction: column;
}
.microbiome-narrative__fact-num {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--copper);
  line-height: 1.2;
}
.microbiome-narrative__fact-label {
  font-size: 0.8rem;
  color: var(--text-light);
}

/* 右侧可视化 — 抽象微生态系统 */
.microbiome-narrative__visual {
  position: relative;
  width: 100%;
  aspect-ratio: 1/1;
  max-width: 460px;
  margin: 0 auto;
}
.microbiome-visual {
  position: relative;
  width: 100%;
  height: 100%;
}
/* 中心大细胞 */
.microbiome-visual__center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 35%, rgba(216,180,122,0.25), transparent 70%);
  border: 2px solid rgba(166,107,70,0.2);
}
.microbiome-visual__center::after {
  content: "";
  position: absolute;
  inset: 20%;
  border-radius: 50%;
  background: radial-gradient(circle at 45% 40%, rgba(166,107,70,0.15), transparent 50%);
  border: 1px solid rgba(216,180,122,0.2);
}
/* 环绕小细胞 */
.microbiome-visual__orbit {
  position: absolute;
  border-radius: 50%;
  border: 1px dashed rgba(166,107,70,0.15);
}
.microbiome-visual__orbit--inner {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 260px;
  height: 260px;
}
.microbiome-visual__orbit--outer {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 360px;
  height: 360px;
}
.microbiome-visual__satellite {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 35%, rgba(216,180,122,0.3), transparent 70%);
  border: 1px solid rgba(166,107,70,0.12);
}
.microbiome-visual__satellite--s1 { width: 32px; height: 32px; top: -16px; left: calc(50% - 16px); }
.microbiome-visual__satellite--s2 { width: 24px; height: 24px; bottom: -12px; left: 25%; }
.microbiome-visual__satellite--s3 { width: 28px; height: 28px; right: 10%; top: 30%; }
.microbiome-visual__satellite--s4 { width: 20px; height: 20px; left: 8%; bottom: 35%; }
.microbiome-visual__satellite--s5 { width: 36px; height: 36px; right: -18px; top: calc(50% - 18px); }

@media (prefers-reduced-motion: no-preference) {
  .microbiome-visual__orbit--inner {
    animation: rotate-orbit 20s linear infinite;
  }
  .microbiome-visual__orbit--outer {
    animation: rotate-orbit 28s linear infinite reverse;
  }
}
@keyframes rotate-orbit {
  from { transform: translate(-50%, -50%) rotate(0deg); }
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* ============================================================
   5. 双会概览 #overview (第2幕：探索认知)
   ============================================================ */
.overview__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 32px;
}
.overview-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 36px 32px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  transition: all var(--transition);
  position: relative;
}
.overview-card:hover {
  box-shadow: var(--shadow-elevated);
  border-color: var(--champagne);
}
.overview-card__header {
  margin-bottom: 20px;
}
.overview-card__date {
  font-size: 0.82rem;
  color: var(--copper);
  font-weight: 600;
  margin-bottom: 6px;
}
.overview-card__title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 6px;
}
.overview-card__desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
}
.overview-card__stats {
  display: flex;
  gap: 24px;
  margin-bottom: 24px;
  padding: 16px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.overview-card__stat-num {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--copper);
  line-height: 1.2;
}
.overview-card__stat-label {
  font-size: 0.78rem;
  color: var(--text-light);
}
.overview-card__footer {
  margin-top: auto;
  padding-top: 16px;
}

/* ============================================================
   6. 岗位选择器 #persona-selector (第2幕)
   ============================================================ */
.persona__grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin-bottom: 40px;
}
.persona-card {
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px 16px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: var(--shadow-card);
}
.persona-card:hover {
  border-color: var(--champagne);
  box-shadow: var(--shadow-elevated);
}
.persona-card--active {
  border-color: var(--copper);
  background: var(--warm-bg);
}
.persona-card__icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 12px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--warm-bg);
  color: var(--copper);
  font-size: 1.2rem;
  font-weight: 700;
}
.persona-card--active .persona-card__icon {
  background: var(--copper);
  color: #fff;
}
.persona-card__name {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--ink);
}

.persona__prompt {
  text-align: center;
  padding: 48px 24px;
  background: var(--surface);
  border: 2px dashed var(--border);
  border-radius: var(--radius-md);
  color: var(--text-light);
}
.persona__result {
  display: none;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 36px 32px;
  box-shadow: var(--shadow-card);
}
.persona__result--visible {
  display: block;
}
.persona__result-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 8px;
}
.persona__result-event {
  font-size: 0.92rem;
  color: var(--copper);
  font-weight: 600;
  margin-bottom: 24px;
}
.persona__result-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}
.persona__result-item {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 16px;
  background: var(--warm-bg);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  transition: background var(--transition);
}
.persona__result-item:hover {
  background: rgba(166,107,70,0.06);
}
.persona__result-time {
  font-weight: 700;
  color: var(--copper);
  white-space: nowrap;
  min-width: 80px;
}
.persona__result-info {
  flex: 1;
}
.persona__result-session-title {
  font-weight: 600;
  color: var(--ink);
}
.persona__result-speaker {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/* ============================================================
   7. 完整议程 #agenda (第3幕：决策验证)
   ============================================================ */
.agenda__tabs {
  display: flex;
  gap: 0;
  margin-bottom: 24px;
  border-bottom: 2px solid var(--border);
}
.agenda__tab {
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all var(--transition);
  background: none;
  cursor: pointer;
}
.agenda__tab:hover {
  color: var(--ink);
}
.agenda__tab--active {
  color: var(--copper);
  border-bottom-color: var(--copper);
}
.agenda__filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}
.agenda__filter {
  font-size: 0.82rem;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
}
.agenda__filter:hover {
  border-color: var(--copper);
  color: var(--copper);
}
.agenda__filter--active {
  background: var(--copper);
  color: #fff;
  border-color: var(--copper);
}
.agenda__count {
  font-size: 0.82rem;
  color: var(--text-light);
  margin-bottom: 16px;
}
.agenda__list {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.agenda__row {
  display: grid;
  grid-template-columns: 100px 50px 1fr 120px 100px;
  align-items: center;
  gap: 16px;
  padding: 16px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
  transition: background var(--transition);
}
.agenda__row:hover {
  background: var(--warm-bg);
}
.agenda__row--hidden {
  display: none;
}
.agenda__row--conflict {
  background: #FFFBF0;
}
.agenda__row--highlight {
  background: rgba(166,107,70,0.06);
  border-left: 3px solid var(--copper);
}
.agenda__time {
  font-weight: 600;
  color: var(--copper);
  white-space: nowrap;
}
.agenda__conflict-icon {
  color: #C79500;
  font-size: 1rem;
  cursor: help;
  text-align: center;
}
.agenda__conflict-icon::after {
  content: "\26A0";
}
.agenda__session-title {
  font-weight: 600;
  color: var(--ink);
  line-height: 1.4;
}
.agenda__speaker-link {
  font-size: 0.82rem;
  color: var(--copper);
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.agenda__speaker-link:hover {
  color: var(--copper-dark);
}
.agenda__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
.agenda__status {
  font-size: 0.78rem;
  text-align: right;
}

/* ============================================================
   8. 核心问题映射 #problem-mapper (第3幕)
   ============================================================ */
.problem__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 32px;
}
.problem-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-card);
  transition: all var(--transition);
}
.problem-card--highlight {
  border-color: var(--copper);
  box-shadow: var(--shadow-elevated);
  background: rgba(166,107,70,0.02);
}
.problem-card__question {
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 16px;
  line-height: 1.5;
}
.problem-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  font-size: 0.82rem;
  color: var(--text-secondary);
}
.problem-card__session {
  font-weight: 600;
  color: var(--copper);
  cursor: pointer;
}
.problem-card__session:hover {
  text-decoration: underline;
}
.problem-card__divider {
  color: var(--text-light);
}

/* ============================================================
   9. 演讲嘉宾 #speakers (第3幕)
   ============================================================ */
.speakers__group-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--ink);
  margin: 40px 0 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.speakers__group-title:first-child {
  margin-top: 0;
}
.speakers__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.speaker-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  text-align: center;
  box-shadow: var(--shadow-card);
  transition: all var(--transition);
}
.speaker-card:hover {
  box-shadow: var(--shadow-elevated);
  border-color: var(--champagne);
}
.speaker-card__avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--copper);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 700;
  margin: 0 auto 16px;
  letter-spacing: 0.04em;
}
.speaker-card__name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 4px;
}
.speaker-card__title {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-bottom: 2px;
}
.speaker-card__org {
  font-size: 0.78rem;
  color: var(--text-light);
  margin-bottom: 12px;
}
.speaker-card__topic {
  font-size: 0.82rem;
  color: var(--copper);
  font-weight: 600;
  line-height: 1.4;
}

/* ============================================================
   10. 参观交流 #visit (第4幕：转化行动)
   ============================================================ */
.visit__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 32px;
}
.visit-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 36px 32px;
  box-shadow: var(--shadow-card);
  transition: all var(--transition);
}
.visit-card:hover {
  box-shadow: var(--shadow-elevated);
  border-color: var(--champagne);
}
.visit-card__title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 12px;
}
.visit-card__desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================================
   11. 位置集群 #location-cluster (第4幕·新)
   ============================================================ */

/* 手风琴式位置集群 */
.location-cluster {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 32px;
}
.location-cluster__toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 20px 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  transition: all var(--transition);
}
.location-cluster__toggle:hover {
  border-color: var(--copper);
  background: var(--warm-bg);
}
.location-cluster__toggle-icon {
  font-size: 1.2rem;
  color: var(--text-light);
  transition: transform var(--transition);
}
.location-cluster__toggle[aria-expanded="true"] .location-cluster__toggle-icon {
  transform: rotate(45deg);
}
.location-cluster__panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s ease;
  border: 1px solid transparent;
  border-top: none;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}
.location-cluster__panel--open {
  max-height: 2000px;
  border-color: var(--border);
}
.location-cluster__panel-inner {
  padding: 32px;
  background: var(--surface);
}

/* --- 酒店 (在位置集群内) --- */
.hotels__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 40px;
}
.hotel-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition), border-color var(--transition);
}
.hotel-card:hover {
  box-shadow: var(--shadow-elevated);
  border-color: var(--champagne);
}
.hotel-card__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 12px;
}
.hotel-card__name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.35;
}
.tag--hotel-rating {
  flex-shrink: 0;
  font-size: 0.75rem;
}
.hotel-card__meta {
  display: flex;
  gap: 16px;
  margin-bottom: 14px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.hotel-card__distance {
  font-weight: 600;
  color: var(--copper);
}
.hotel-card__address {
  color: var(--text-light);
}
.hotel-card__desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 14px;
  flex: 1;
}
.hotel-card__phone {
  font-size: 0.88rem;
  color: var(--text-secondary);
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
.hotels__note {
  margin-top: 24px;
  font-size: 0.85rem;
  color: var(--text-light);
  font-style: italic;
}

/* --- 地图 (在位置集群内) --- */
.map__container {
  margin-top: 32px;
}
.map__container iframe {
  width: 100%;
  height: 400px;
  border: 0;
  border-radius: var(--radius-md);
}
.map__info {
  margin-top: 12px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
}
.map__info-icon {
  flex-shrink: 0;
}

/* ============================================================
   12. 报名表单 #register (第4幕·核心转化)
   ============================================================ */
.register__form {
  max-width: 640px;
  margin: 32px auto 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 40px;
  box-shadow: var(--shadow-card);
}
.form__row {
  margin-bottom: 20px;
}
.form__label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}
.form__label--required::after {
  content: " *";
  color: var(--brand-red);
}
.form__input,
.form__select,
.form__textarea {
  width: 100%;
  padding: 10px 14px;
  font-size: 0.92rem;
  font-family: inherit;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--ink);
  transition: border-color var(--transition);
  outline: none;
}
.form__input:focus,
.form__select:focus,
.form__textarea:focus {
  border-color: var(--copper);
  box-shadow: 0 0 0 3px rgba(166, 107, 70, 0.1);
}
.form__input--error,
.form__select--error {
  border-color: var(--brand-red);
}
.form__error {
  font-size: 0.78rem;
  color: var(--brand-red);
  margin-top: 4px;
  display: none;
}
.form__error--visible {
  display: block;
}
.form__textarea {
  resize: vertical;
  min-height: 80px;
}
.form__checkbox-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 24px;
}
.form__checkbox {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--copper);
  flex-shrink: 0;
}
.form__checkbox-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}
.form__submit {
  width: 100%;
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: 700;
  background: var(--brand-red);
  color: #fff;
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: background var(--transition);
}
.form__submit:hover {
  background: var(--brand-red-dark);
}
.form__submit:disabled {
  background: var(--text-light);
  cursor: not-allowed;
}
.form__fallback {
  display: none;
  margin-top: 20px;
  padding: 20px;
  background: var(--warm-bg);
  border-radius: var(--radius-sm);
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.form__fallback--visible {
  display: block;
}

/* ============================================================
   13. FAQ #faq (第5幕：支持兜底)
   ============================================================ */
.faq__list {
  max-width: 760px;
  margin: 32px auto 0;
}
.faq__item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  overflow: hidden;
  background: var(--surface);
}
.faq__question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink);
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  line-height: 1.5;
}
.faq__question::after {
  content: "+";
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--text-light);
  margin-left: 16px;
  flex-shrink: 0;
  transition: transform var(--transition);
}
.faq__item--open .faq__question::after {
  content: "\2212";
  color: var(--copper);
}
.faq__answer {
  display: none;
  padding: 0 24px 20px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}
.faq__item--open .faq__answer {
  display: block;
}
.faq__pending {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-light);
  background: var(--warm-bg);
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  margin-left: 8px;
}

/* ============================================================
   14. 页脚 #footer
   ============================================================ */
.footer {
  background: var(--copper-dark);
  color: rgba(255, 255, 255, 0.75);
  padding: 48px 0 32px;
  position: relative;
}
.footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(216,180,122,0.3) 50%,
    transparent 100%
  );
}
.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 32px;
}
.footer__brand {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 12px;
}
.footer__logo-zh {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
}
.footer__logo-en {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 0.04em;
}
.footer__info p {
  font-size: 0.85rem;
  margin-bottom: 4px;
  line-height: 1.6;
}
.footer__copy {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.4);
  margin-top: 8px;
}

/* ============================================================
   响应式 — 平板 (<1024px)
   ============================================================ */
@media (max-width: 1024px) {
  .section {
    padding: 60px 0;
  }
  .microbiome-narrative__grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .microbiome-narrative__visual {
    max-width: 320px;
  }
  .overview__grid {
    grid-template-columns: 1fr;
  }
  .persona__grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .speakers__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .agenda__row {
    grid-template-columns: 80px 36px 1fr 100px;
    gap: 10px;
    font-size: 0.84rem;
  }
  .agenda__status {
    display: none;
  }
  .hero__stat {
    min-width: 120px;
    padding: 16px 12px;
  }
  .problem__grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   响应式 — 手机 (<768px)
   ============================================================ */
@media (max-width: 768px) {
  :root {
    --nav-height: 60px;
  }

  html {
    scroll-padding-top: calc(var(--nav-height) + var(--persona-bar-height));
  }

  /* 导航 — 汉堡菜单 */
  .nav__links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--paper);
    padding: 16px 0;
    transform: translateX(100%);
    transition: transform var(--transition);
    overflow-y: auto;
    z-index: 999;
  }
  .nav__links--open {
    transform: translateX(0);
  }
  .nav__link {
    padding: 14px 24px;
    font-size: 1rem;
    border-bottom: 1px solid var(--border);
    border-radius: 0;
  }
  .nav__cta {
    margin: 12px 24px;
    width: calc(100% - 48px);
  }
  .nav__cta .btn {
    width: 100%;
  }
  .nav__toggle {
    display: flex;
  }

  /* 微生态叙事 */
  .microbiome-narrative {
    padding: 60px 0;
  }
  .microbiome-narrative__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .microbiome-narrative__visual {
    max-width: 260px;
  }
  .microbiome-narrative__heading {
    font-size: 1.4rem;
  }

  /* Hero */
  .hero {
    padding: 100px 0 48px;
  }
  /* 移动端：降低模糊值（节省性能），背景图更清晰可见 */
  .hero__bg-layer {
    filter: blur(4px);
    transform: scale(1.15);
    opacity: 0.55;
    inset: -10px;
  }
  .hero__stats {
    flex-direction: column;
    gap: 0;
  }
  .hero__stat {
    border-right: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
    padding: 14px 16px;
  }
  .hero__stat:last-child {
    border-bottom: none;
  }
  .hero__ctas {
    flex-direction: column;
    align-items: center;
  }

  /* Section */
  .section {
    padding: 48px 0;
  }
  .section__title {
    font-size: 1.5rem;
  }

  /* Overview */
  .overview__grid {
    grid-template-columns: 1fr;
  }

  /* Persona */
  .persona__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  .persona-card {
    padding: 16px 10px;
  }
  .persona-card__name {
    font-size: 0.82rem;
  }

  /* Problem */
  .problem__grid {
    grid-template-columns: 1fr;
  }

  /* Agenda */
  .agenda__row {
    grid-template-columns: 70px 1fr;
    gap: 8px;
    font-size: 0.82rem;
    padding: 12px 10px;
  }
  .agenda__conflict-icon,
  .agenda__speaker-link,
  .agenda__status {
    display: none;
  }
  .agenda__tags {
    grid-column: 1 / -1;
  }
  .agenda__tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .agenda__tab {
    padding: 10px 16px;
    font-size: 0.88rem;
    white-space: nowrap;
  }
  .agenda__filters {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 4px;
  }
  .agenda__filter {
    white-space: nowrap;
    flex-shrink: 0;
  }

  /* Speakers */
  .speakers__grid {
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }
  .speaker-card {
    padding: 20px 14px;
  }

  /* Visit */
  .visit__grid {
    grid-template-columns: 1fr;
  }

  /* Hotels */
  .hotel-card {
    padding: 24px 20px;
  }
  .hotels__grid {
    grid-template-columns: 1fr;
  }

  /* Map */
  .map__container iframe {
    height: 320px;
  }

  /* Location cluster */
  .location-cluster__toggle {
    padding: 16px 20px;
    font-size: 0.92rem;
  }
  .location-cluster__panel-inner {
    padding: 20px;
  }

  /* Register */
  .register__form {
    padding: 24px 20px;
  }

  /* Footer */
  .footer__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  /* Persona context bar */
  .persona-context-bar {
    font-size: 0.78rem;
  }
}

/* ============================================================
   响应式 — 小手机 (<480px)
   ============================================================ */
@media (max-width: 480px) {
  .persona__grid {
    grid-template-columns: 1fr 1fr;
  }
  .speakers__grid {
    grid-template-columns: 1fr;
  }
  .container {
    padding: 0 16px;
  }
  .agenda__row {
    grid-template-columns: 60px 1fr;
  }
  .microbiome-narrative__visual {
    max-width: 200px;
  }
}

/* ============================================================
   4色主题配色方案
   ============================================================ */

/* 红色主题 */
[data-theme="red"] {
  --brand-red: #C62828;
  --brand-red-dark: #8E0000;
  --copper: #C0392B;
  --copper-dark: #7B241C;
  --champagne: #F5B7B1;
  --warm-bg: #FDF2F2;
  --paper: #FFF9F9;
  --surface: #FFFFFF;
  --ink: #211818;
  --text-secondary: #7F6565;
  --text-light: #9F8A8A;
  --border: #E8D0D0;
  --microbe-glow: rgba(192,57,43,0.08);
  --microbe-cell-1: rgba(245,183,177,0.15);
  --microbe-cell-2: rgba(192,57,43,0.10);
  --microbe-cell-3: rgba(123,36,28,0.06);
}

/* 蓝色主题 */
[data-theme="blue"] {
  --brand-red: #1565C0;
  --brand-red-dark: #0D47A1;
  --copper: #2471A3;
  --copper-dark: #1A5276;
  --champagne: #AED6F1;
  --warm-bg: #F2F6FD;
  --paper: #F9FBFF;
  --surface: #FFFFFF;
  --ink: #181B21;
  --text-secondary: #65707F;
  --text-light: #8A939F;
  --border: #D0D9E8;
  --microbe-glow: rgba(36,113,163,0.08);
  --microbe-cell-1: rgba(174,214,241,0.15);
  --microbe-cell-2: rgba(36,113,163,0.10);
  --microbe-cell-3: rgba(26,82,118,0.06);
}

/* 绿色主题 */
[data-theme="green"] {
  --brand-red: #2E7D32;
  --brand-red-dark: #1B5E20;
  --copper: #276747;
  --copper-dark: #1D4E35;
  --champagne: #A9DFBF;
  --warm-bg: #F2FDF5;
  --paper: #F9FFF9;
  --surface: #FFFFFF;
  --ink: #181F18;
  --text-secondary: #657F67;
  --text-light: #8A9F8A;
  --border: #D0E8D2;
  --microbe-glow: rgba(39,103,71,0.08);
  --microbe-cell-1: rgba(169,223,191,0.15);
  --microbe-cell-2: rgba(39,103,71,0.10);
  --microbe-cell-3: rgba(29,78,53,0.06);
}

/* 棕色主题（默认） */
[data-theme="brown"] {
  --brand-red: #D71920;
  --brand-red-dark: #A91218;
  --copper: #A66B46;
  --copper-dark: #533126;
  --champagne: #D8B47A;
  --warm-bg: #F5F0E9;
  --paper: #FFFDF9;
  --surface: #FFFFFF;
  --ink: #211B18;
  --text-secondary: #6F625B;
  --text-light: #978A82;
  --border: #E5D8CC;
  --microbe-glow: rgba(166,107,70,0.08);
  --microbe-cell-1: rgba(216,180,122,0.15);
  --microbe-cell-2: rgba(166,107,70,0.10);
  --microbe-cell-3: rgba(83,49,38,0.06);
}

/* ============================================================
   主题面板 #theme-panel
   ============================================================ */
.theme-panel {
  position: fixed; bottom: 24px; right: 24px; z-index: 10000;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 16px; padding: 16px; box-shadow: 0 8px 32px rgba(0,0,0,0.15);
  display: none; flex-direction: column; gap: 10px;
}
.theme-panel--visible { display: flex; }
.theme-panel__title {
  font-size: 12px; font-weight: 700; color: var(--text-secondary);
  text-align: center; margin-bottom: 4px;
}
.theme-panel__colors { display: flex; gap: 10px; }
.theme-panel__color {
  width: 36px; height: 36px; border-radius: 50%; border: 3px solid transparent;
  cursor: pointer; transition: border-color 0.2s;
}
.theme-panel__color--active { border-color: var(--ink); }
.theme-panel__color[data-theme-value="red"] { background: #C0392B; }
.theme-panel__color[data-theme-value="blue"] { background: #2471A3; }
.theme-panel__color[data-theme-value="green"] { background: #276747; }
.theme-panel__color[data-theme-value="brown"] { background: #A66B46; }

/* ============================================================
   过渡动画 (幕间连接)
   ============================================================ */
@media (prefers-reduced-motion: no-preference) {
  .section {
    animation: section-reveal 0.6s ease-out both;
    animation-timeline: view();
    animation-range: entry 10% cover 30%;
  }

  @keyframes section-reveal {
    from {
      opacity: 0.6;
      transform: translateY(20px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
}