:root {
  /* 紫色主色调方案 */
  --purple-primary: #7A1DA1;      /* 清华紫 - 主色 */
  --purple-light: #9B3BC9;        /* 浅紫 - 强调/hover状态 */
  --purple-dark: #5D147A;         /* 深紫 - 深色背景 */
  --purple-darker: #430E57;       /* 暗紫 - 最深背景 */
  --purple-muted: #8B5CF6;        /* 柔和紫 - 辅助/装饰 */
  
  /* 渐变色方案 */
  --gradient-primary: linear-gradient(135deg, var(--purple-dark) 0%, var(--purple-primary) 50%, var(--purple-darker) 100%);
  --gradient-hero: linear-gradient(135deg, var(--purple-darker) 0%, var(--purple-primary) 30%, var(--purple-dark) 60%, var(--purple-darker) 100%);
  --gradient-button: linear-gradient(135deg, var(--purple-primary) 0%, var(--purple-light) 100%);
  
  /* 文字颜色 */
  --text-primary: #111827;        /* 主文字 */
  --text-secondary: #64748b;      /* 次要文字 */
  --text-muted: #94a3b8;          /* 弱化文字 */
  --text-white: #ffffff;          /* 白色文字（深色背景上） */
  --text-on-purple: rgba(255, 255, 255, 0.9);    /* 紫色背景上的文字 */
  --text-muted-on-purple: rgba(255, 255, 255, 0.75);
  
  /* 辅助色 */
  --accent-glow: #C4B5FD;         /* 发光高亮色 */
  --accent-cyan: #A78BFA;         /* 辅助青色 */
  
  /* 中性色 */
  --bg-white: #ffffff;            /* 纯白背景 */
  --bg-paper: #f8fafc;            /* 浅灰背景 */
  --bg-gray: #f1f5f9;             /* 灰色背景 */
  --border-light: #e2e8f0;        /* 浅色边框 */
  --border-muted: #cbd5e1;        /* 中等边框 */
  
  /* 间距规范 */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
  --spacing-2xl: 64px;
  --spacing-3xl: 80px;
  
  /* 布局变量 */
  --max-width: 1180px;
  --header-height: 74px;
  --border-radius: 8px;
  --shadow-primary: 0 24px 60px rgba(122, 29, 161, 0.15);
  --shadow-purple: 0 24px 60px rgba(122, 29, 161, 0.3);

  /* 兼容别名：统一映射到上方设计系统色板 */
  --white: #ffffff;
  --ink: var(--text-primary);
  --line: var(--border-light);
  --paper: var(--bg-paper);
  --blue: var(--purple-primary);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--text-primary);
  background: var(--bg-white);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
}

body.no-scroll {
  overflow: hidden;
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

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

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

button {
  cursor: pointer;
}

.container {
  width: min(calc(100% - 48px), var(--max-width));
  max-width: var(--max-width);
  margin: 0 auto;
  padding-left: clamp(24px, 4vw, 40px);
  padding-right: clamp(24px, 4vw, 40px);
  width: 100%;
}

.site-header {
  position: fixed;
  z-index: 100;
  top: 0;
  left: 0;
  display: flex;
  width: 100%;
  height: var(--header-height);
  align-items: center;
  padding: 0 clamp(24px, 4vw, 40px);
  color: var(--text-white);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  transition: background 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
}

.site-header.scrolled,
.site-header.header-light {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.94);
  border-bottom-color: var(--border-light);
  box-shadow: 0 8px 30px rgba(15, 23, 42, 0.06);
  backdrop-filter: blur(14px);
}

.site-header.scrolled .menu-button,
.site-header.header-light .menu-button {
  color: var(--purple-primary);
}

.brand {
  display: flex;
  min-width: 250px;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.2;
}

.brand img {
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  object-fit: contain;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 3px;
  white-space: nowrap;
}

.brand-text strong {
  color: var(--text-white);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.brand-text span {
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.site-header.scrolled .brand-text strong,
.site-header.header-light .brand-text strong {
  color: var(--text-primary);
}

.site-header.scrolled .brand-text span,
.site-header.header-light .brand-text span {
  color: var(--text-secondary);
}

.desktop-nav {
  display: flex;
  margin: 0 auto;
  align-items: center;
  gap: 25px;
}

.desktop-nav a {
  position: relative;
  padding: 25px 0 23px;
  color: inherit;
  font-size: 14px;
  white-space: nowrap;
  opacity: 0.82;
}

.desktop-nav a::after {
  position: absolute;
  right: 0;
  bottom: 17px;
  left: 0;
  height: 2px;
  content: "";
  background: var(--accent-glow);
  transform: scaleX(0);
  transition: transform 0.2s ease;
}

.desktop-nav a:hover,
.desktop-nav a.active {
  opacity: 1;
}

.desktop-nav a:hover::after,
.desktop-nav a.active::after {
  transform: scaleX(1);
}

.header-actions {
  display: flex;
  min-width: 250px;
  justify-content: flex-end;
  gap: 8px;
}

.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  gap: 8px;
  color: var(--text-primary);
  border: 1px solid transparent;
  border-radius: var(--border-radius);
  background: transparent;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.3;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.button:hover {
  transform: translateY(-2px);
}

.button:active {
  transform: translateY(0);
}

.button-primary {
  color: var(--text-white);
  background: var(--gradient-button);
  box-shadow: var(--shadow-purple);
}

.button-primary:hover {
  background: linear-gradient(135deg, var(--purple-light) 0%, var(--purple-primary) 100%);
  box-shadow: 0 12px 32px rgba(122, 29, 161, 0.4);
}

.button-secondary {
  color: var(--purple-primary);
  border-color: var(--purple-primary);
  background: var(--bg-white);
}

.button-secondary:hover {
  color: var(--text-white);
  background: var(--purple-primary);
}

.button-ghost {
  color: inherit;
  border-color: currentColor;
  opacity: 0.82;
}

.button-ghost:hover {
  opacity: 1;
}

.button-dark-outline {
  color: var(--text-white);
  border-color: rgba(255, 255, 255, 0.55);
  background: rgba(122, 29, 161, 0.2);
}

.button-dark-outline:hover {
  background: rgba(122, 29, 161, 0.3);
  border-color: rgba(255, 255, 255, 0.7);
}

.button-large {
  min-height: 52px;
  padding: 14px 24px;
  font-size: 15px;
}

.menu-button {
  display: none;
  width: 44px;
  height: 44px;
  padding: 11px;
  border: 0;
  background: transparent;
  color: var(--white);
}

.menu-button span {
  display: block;
  width: 22px;
  height: 1px;
  margin: 6px 0;
  background: currentColor;
  transition: transform 0.2s ease;
}

.menu-button.open span:first-child {
  transform: translateY(3.5px) rotate(45deg);
}

.menu-button.open span:last-child {
  transform: translateY(-3.5px) rotate(-45deg);
}

.poster-back {
  position: fixed;
  top: 20px;
  left: 20px;
  z-index: 90;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 16px;
  color: var(--text-white);
  background: rgba(32, 14, 50, 0.55);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-decoration: none;
  box-shadow: 0 4px 14px rgba(32, 14, 50, 0.28);
  transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.poster-back-icon {
  font-size: 20px;
  line-height: 1;
  font-weight: 700;
  color: var(--accent-glow);
}

.poster-back:hover {
  color: var(--text-white);
  background: rgba(32, 14, 50, 0.8);
  transform: translateX(-2px);
  box-shadow: 0 6px 20px rgba(32, 14, 50, 0.4);
}

.poster-back:hover .poster-back-icon {
  color: var(--text-white);
}

@media (max-width: 640px) {
  .poster-back {
    top: 14px;
    left: 14px;
    padding: 7px 14px;
    font-size: 12px;
  }

  .poster-back-icon {
    font-size: 18px;
  }
}

.mobile-menu {
  position: fixed;
  z-index: 90;
  inset: var(--header-height) 0 auto 0;
  display: none;
  padding: 22px 24px 28px;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-light);
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
}

.mobile-menu.open {
  display: block;
}

.mobile-menu nav {
  display: grid;
}

.mobile-menu nav a {
  padding: 13px 0;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-primary);
  font-weight: 700;
  transition: color 0.2s ease;
}

.mobile-menu nav a:hover,
.mobile-menu nav a.active {
  color: var(--purple-primary);
}

.mobile-menu-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin-top: 20px;
  gap: 10px;
}

.hero {
  position: relative;
  min-height: min(900px, 100vh);
  overflow: hidden;
  color: var(--text-white);
  background: var(--gradient-hero);
}

.hero::before {
  position: absolute;
  z-index: 1;
  inset: 0;
  content: "";
  background: 
    radial-gradient(ellipse at 80% 20%, rgba(196, 181, 253, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 20% 80%, rgba(155, 59, 201, 0.18) 0%, transparent 50%),
    linear-gradient(90deg, var(--purple-darker) 0%, var(--purple-primary) 42%, var(--purple-darker) 78%);
  pointer-events: none;
}

.hero-media {
  position: absolute;
  inset: 0 0 0 30%;
  background: url("../images/hero-nvidia-spacex.webp") center right / cover no-repeat;
  mask-image: linear-gradient(90deg, transparent 0%, rgba(0, 0, 0, 0.6) 25%, rgba(0, 0, 0, 0.9) 60%);
  opacity: 0.75;
}

.hero-grid {
  position: absolute;
  z-index: 2;
  inset: 0;
  opacity: 0;
  background-image:
    linear-gradient(rgba(196, 181, 253, 0.5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(196, 181, 253, 0.5) 1px, transparent 1px),
    radial-gradient(circle at 2px 2px, rgba(196, 181, 253, 0.3) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, #000, transparent 78%);
}

.hero::after {
  position: absolute;
  z-index: 1;
  inset: 0;
  content: "";
  background-image: 
    radial-gradient(2px 2px at 20px 30px, rgba(255, 255, 255, 0.4), transparent),
    radial-gradient(2px 2px at 40px 70px, rgba(255, 255, 255, 0.3), transparent),
    radial-gradient(1px 1px at 90px 40px, rgba(255, 255, 255, 0.5), transparent),
    radial-gradient(2px 2px at 130px 80px, rgba(255, 255, 255, 0.2), transparent),
    radial-gradient(1px 1px at 160px 120px, rgba(255, 255, 255, 0.4), transparent),
    radial-gradient(2px 2px at 200px 50px, rgba(255, 255, 255, 0.3), transparent),
    radial-gradient(1px 1px at 250px 180px, rgba(255, 255, 255, 0.5), transparent),
    radial-gradient(2px 2px at 300px 100px, rgba(255, 255, 255, 0.2), transparent),
    radial-gradient(1px 1px at 350px 200px, rgba(255, 255, 255, 0.4), transparent),
    radial-gradient(2px 2px at 400px 60px, rgba(255, 255, 255, 0.3), transparent),
    radial-gradient(1px 1px at 500px 150px, rgba(196, 181, 253, 0.7), transparent),
    radial-gradient(2px 2px at 550px 220px, rgba(155, 59, 201, 0.5), transparent),
    radial-gradient(1px 1px at 600px 80px, rgba(167, 139, 250, 0.6), transparent);
  background-size: 650px 250px;
  animation: twinkle 8s ease-in-out infinite;
  pointer-events: none;
}

@keyframes twinkle {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 0.8; }
}

.hero-circuit {
  position: absolute;
  z-index: 1;
  inset: 0;
  opacity: 0.06;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 0L30 20M30 40L30 60M0 30L20 30M40 30L60 30M15 15L45 45M45 15L15 45' stroke='%23C4B5FD' stroke-width='0.5' fill='none'/%3E%3Ccircle cx='30' cy='30' r='3' fill='%23C4B5FD'/%3E%3Ccircle cx='10' cy='10' r='1.5' fill='%23C4B5FD'/%3E%3Ccircle cx='50' cy='10' r='1.5' fill='%23C4B5FD'/%3E%3Ccircle cx='10' cy='50' r='1.5' fill='%23C4B5FD'/%3E%3Ccircle cx='50' cy='50' r='1.5' fill='%23C4B5FD'/%3E%3C/svg%3E");
  background-size: 60px 60px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,0.8), transparent 60%);
}

.hero-inner {
  position: relative;
  z-index: 3;
  display: flex;
  min-height: min(800px, calc(100vh - 90px));
  align-items: center;
  padding: 130px 0 150px;
}

.hero-copy {
  width: min(650px, 61%);
}

.hero-copy::before {
  display: block;
  width: 68px;
  height: 3px;
  margin-bottom: 26px;
  content: "";
  background: linear-gradient(90deg, var(--accent-glow), var(--lime));
}

.hero h1 {
  max-width: 780px;
  margin: 0;
  font-size: clamp(46px, 5.4vw, 78px);
  font-weight: 750;
  line-height: 1.08;
  letter-spacing: 0;
}

.hero-title {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.hero-title-main {
  font-size: clamp(56px, 6.5vw, 88px);
  font-weight: 800;
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, var(--text-white) 0%, var(--accent-glow) 50%, var(--text-white) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 0 40px rgba(196, 181, 253, 0.3);
}

.hero-title-sub {
  font-size: clamp(28px, 3.2vw, 42px);
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--text-white);
  opacity: 0.95;
}

.hero-title-tag {
  font-size: clamp(16px, 1.8vw, 22px);
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--accent-glow);
  text-align: left;
  margin-top: 4px;
}

.hero-slogan {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 28px 0 0;
  color: var(--accent-glow);
  font-size: clamp(18px, 2vw, 26px);
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.5;
}

.hero-slogan-line {
  display: block;
  position: relative;
  padding-left: 20px;
}

.hero-slogan-line::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 12px;
  height: 12px;
  background: var(--accent-glow);
  border-radius: 50%;
  transform: translateY(-50%);
  box-shadow: 0 0 12px var(--accent-glow);
}

.hero-slogan-line .dot {
  display: inline-block;
  width: 12px;
  height: 12px;
  margin: 0 8px;
  background: var(--accent-glow);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--accent-glow);
  vertical-align: middle;
}

.hero-description {
  max-width: 620px;
  margin: 16px 0 0;
  color: var(--text-white);
  font-size: clamp(18px, 2vw, 24px);
  font-weight: 600;
  line-height: 1.5;
}

.hero-actions {
  display: flex;
  margin-top: 35px;
  gap: 12px;
}

.text-link {
  display: inline-flex;
  margin-top: 28px;
  align-items: center;
  gap: 9px;
  color: var(--accent-glow);
  font-size: 14px;
  font-weight: 600;
  transition: color 0.2s ease;
}

.text-link:hover {
  color: var(--purple-light);
}

.hero-proof {
  position: absolute;
  z-index: 4;
  right: 0;
  bottom: 0;
  left: 0;
  padding: 12px 0;
  border-top: 1px solid rgba(196, 181, 253, 0.15);
  background: linear-gradient(180deg, rgba(67, 14, 87, 0.92) 0%, rgba(93, 20, 122, 0.96) 100%);
  backdrop-filter: blur(16px);
}

.proof-wrapper {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 10px 20px;
  max-width: 900px;
}

.proof-wrapper .proof-item:nth-child(-n+3) {
  flex: 0 0 auto;
}

.proof-wrapper .proof-item:nth-child(n+4) {
  flex: 0 0 auto;
}

.proof-item {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 20px;
  background: rgba(196, 181, 253, 0.06);
  border: 1px solid rgba(196, 181, 253, 0.1);
  transition: all 0.3s ease;
}

.proof-item:hover {
  background: rgba(196, 181, 253, 0.12);
  border-color: rgba(196, 181, 253, 0.25);
}

.proof-number {
  color: var(--accent-glow);
  font-size: 15px;
  font-weight: 750;
  letter-spacing: 0.02em;
}

.proof-label {
  color: rgba(255, 255, 255, 0.85);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.section {
  padding: clamp(60px, 8vw, 90px) 0;
  margin-bottom: clamp(30px, 4vw, 50px);
}

.section-heading {
  max-width: 800px;
  margin-bottom: clamp(40px, 5vw, 60px);
}

.section-index {
  margin: 0 0 var(--spacing-md);
  color: var(--purple-primary);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.section-index-light,
.community-section .section-index,
.apply-section .section-index {
  color: var(--accent-glow);
}

.section h2,
.visit-section h2,
.page-hero h1 {
  margin: 0;
  font-size: clamp(34px, 4.2vw, 56px);
  font-weight: 740;
  line-height: 1.2;
  letter-spacing: 0;
}

.visit-section h2,
.community-section h2,
.outcomes-section h2 {
  font-size: clamp(28px, 3.5vw, 46px);
}

.section-heading > p:last-child,
.split-heading > p {
  max-width: 690px;
  margin: 24px 0 0;
  color: var(--text-secondary);
  font-size: 17px;
}

.community-copy > p {
  max-width: 690px;
  margin: 24px 0 0;
  color: var(--text-muted-on-purple);
  font-size: 17px;
}

.community-benefits {
  max-width: 690px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.community-benefits li {
  position: relative;
  padding: 14px 0 14px 32px;
  color: var(--text-muted-on-purple);
  font-size: 17px;
  line-height: 1.6;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.community-benefits li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--accent-glow);
  font-size: 24px;
  line-height: 1;
}

.community-benefits li:last-child {
  border-bottom: none;
}

.split-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(300px, 0.6fr);
  margin-bottom: 62px;
  align-items: end;
  gap: 70px;
}

.split-heading > p {
  margin: 0;
}

.value-section {
  background: var(--white);
}

.value-slogan {
  max-width: 800px;
  margin: 32px 0 0;
  padding: 22px 28px;
  border-left: 4px solid var(--accent-glow);
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.04) 0%, rgba(59, 130, 246, 0.03) 100%);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.8;
  color: var(--ink);
  quotes: none;
}

.value-slogan::before,
.value-slogan::after {
  display: none;
}

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

.value-item {
  display: grid;
  grid-template-columns: 90px 1fr;
  padding: 38px 0;
  align-items: flex-start;
  border-bottom: 1px solid var(--line);
  transition: background 0.25s ease, padding-left 0.25s ease;
}

.value-item:hover {
  padding-left: 12px;
  background: linear-gradient(90deg, rgba(122, 29, 161, 0.04), transparent 65%);
}

.value-number {
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  color: var(--blue);
  font: 700 12px/1.4 ui-monospace, SFMono-Regular, Menlo, monospace;
  padding-top: 10px;
  transition: color 0.25s ease;
}

.value-item:hover .value-number {
  color: var(--purple-primary);
}

.value-item h3 {
  margin: 0 0 10px;
  font-size: 27px;
}

.value-item p {
  max-width: 820px;
  margin: 0;
  color: var(--text-secondary);
}

.curriculum-section {
  background: var(--paper);
}

.curriculum-layout {
  display: grid;
  grid-template-columns: 40% 60%;
  overflow: hidden;
  border: 1px solid #cdd7e5;
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: 0 25px 60px rgba(15, 23, 42, 0.08);
}

.course-tabs {
  border-right: 1px solid #cdd7e5;
  background: #eef3f9;
}

.curriculum-cards {
  display: grid;
  gap: 16px;
}

.course-card {
  border-radius: 12px;
  border: 1px solid var(--line);
  overflow: hidden;
  background: var(--white);
  transition: all 0.3s ease;
}

.course-card:hover {
  border-color: var(--purple-primary);
  box-shadow: 0 4px 20px rgba(122, 29, 161, 0.1);
}

.course-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 22px 26px;
  text-align: left;
  border: 0;
  background: transparent;
  cursor: pointer;
  transition: background 0.3s ease;
}

.course-card-header:hover {
  background: rgba(122, 29, 161, 0.04);
}

.course-time {
  color: var(--purple-primary);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.05em;
}

.course-title {
  flex: 1;
  margin: 0 16px;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
}

.course-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(122, 29, 161, 0.1);
  color: var(--purple-primary);
  font-size: 20px;
  font-weight: 300;
  line-height: 1;
  transition: all 0.3s ease;
}

.course-card-header:hover .course-toggle {
  background: rgba(122, 29, 161, 0.15);
}

.course-card-content {
  padding: 0 26px 26px;
  overflow: hidden;
  max-height: 500px;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.course-card-content[aria-hidden="true"] {
  max-height: 0;
  padding-bottom: 0;
}

.course-card-content h3 {
  margin: 0 0 14px;
  font-size: 16px;
  font-weight: 700;
  color: var(--purple-primary);
}

.course-card-content p {
  margin: 0 0 16px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
}

.course-card-content ul {
  margin: 0;
  padding-left: 20px;
}

.course-card-content li {
  margin-bottom: 8px;
  color: var(--ink);
  font-size: 14px;
  line-height: 1.6;
}

.course-card-content li:last-child {
  margin-bottom: 0;
}

.course-tab {
  position: relative;
  display: grid;
  width: 100%;
  min-height: 120px;
  padding: 26px 34px;
  text-align: left;
  color: var(--ink);
  border: 0;
  border-bottom: 1px solid #cdd7e5;
  background: transparent;
}

.course-tab:last-child {
  border-bottom: 0;
}

.course-tab::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 4px;
  content: "";
  background: var(--accent-glow);
  transform: scaleY(0);
}

.course-tab.active {
  color: var(--white);
  background: var(--purple-primary);
}

.course-tab.active::before {
  transform: scaleY(1);
}

.course-tab span {
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
}

.course-tab.active span {
  color: var(--accent-glow);
}

.course-tab strong {
  margin-top: 8px;
  font-size: 20px;
}

.course-panel {
  min-height: 480px;
  padding: 52px 58px;
  background:
    linear-gradient(rgba(37, 99, 235, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 99, 235, 0.04) 1px, transparent 1px),
    var(--white);
  background-size: 36px 36px;
}

.course-panel-label {
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.course-panel h3 {
  margin: 14px 0 28px;
  font-size: 34px;
  line-height: 1.3;
}

.course-panel ul {
  display: grid;
  margin: 0;
  padding: 0;
  gap: 16px;
  list-style: none;
}

.course-panel li {
  position: relative;
  padding-left: 24px;
  color: #334155;
}

.course-panel li::before {
  position: absolute;
  top: 0.78em;
  left: 0;
  width: 9px;
  height: 2px;
  content: "";
  background: var(--accent-glow);
}

.course-deliverable {
  display: grid;
  grid-template-columns: 120px 1fr;
  margin-top: 38px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.course-deliverable span {
  color: var(--text-secondary);
  font-size: 13px;
}

.course-deliverable strong {
  font-size: 17px;
}

.curriculum-output {
  display: grid;
  grid-template-columns: 150px 1fr auto;
  margin-top: 20px;
  padding: 22px 26px;
  align-items: center;
  gap: 24px;
  color: var(--text-white);
  border-radius: var(--border-radius);
  background: var(--purple-darker);
}

.curriculum-output span {
  color: var(--text-white);
  font-weight: 800;
}

.curriculum-output p {
  margin: 0;
  color: var(--text-white);
  font-size: 14px;
}

.curriculum-output a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-white);
  font-size: 14px;
  font-weight: 600;
  transition: color 0.2s ease;
  text-decoration: underline;
}

.curriculum-output a:hover {
  color: var(--accent-glow);
}

.section-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--purple-primary);
  font-size: 14px;
  font-weight: 600;
  transition: color 0.2s ease;
}

.section-link:hover {
  color: var(--purple-light);
}

.experts-section {
  background: var(--white);
}

.expert-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.expert-card {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr) auto;
  min-width: 0;
  min-height: 154px;
  padding: 24px 20px;
  align-items: center;
  gap: 16px;
  text-align: left;
  color: var(--ink);
  border: 0;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--white);
  transition: background 0.2s ease, transform 0.2s ease;
}

.expert-card:hover {
  z-index: 1;
  background: linear-gradient(135deg, rgba(122, 29, 161, 0.03) 0%, rgba(155, 59, 201, 0.02) 100%);
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(122, 29, 161, 0.1);
}

.expert-card img {
  width: 76px;
  height: 92px;
  object-fit: cover;
  object-position: top center;
  filter: grayscale(20%);
}

.expert-info {
  display: grid;
  min-width: 0;
}

.expert-info strong {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-size: 20px;
  line-height: 1.3;
}

.expert-info strong small {
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 500;
}

.expert-title {
  display: block;
  margin-top: 6px;
  color: #334155;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.55;
}

.expert-info > small {
  display: -webkit-box;
  margin-top: 5px;
  overflow: hidden;
  color: var(--text-secondary);
  font-size: 11px;
  line-height: 1.5;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.expert-desc {
  display: block;
  margin-top: 10px;
  padding-top: 10px;
  color: var(--purple-primary);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.5;
  border-top: 1px solid rgba(122, 29, 161, 0.15);
}

.expert-footer-note {
  margin-top: 40px;
  padding: 20px 24px;
  color: var(--text-secondary);
  font-size: 15px;
  font-style: italic;
  border-top: 1px dashed var(--border-light);
  text-align: center;
}

.expert-role {
  color: var(--purple-primary);
  font-size: 12px;
  font-weight: 800;
  writing-mode: vertical-rl;
}

.section-link {
  display: flex;
  margin-top: 28px;
  justify-content: flex-end;
  align-items: center;
  gap: 10px;
}

.visit-section {
  position: relative;
  min-height: 720px;
  overflow: hidden;
  color: var(--text-white);
  background: var(--purple-darker);
}

.visit-section h2 {
  color: var(--text-white);
}

.visit-section > img {
  position: absolute;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 1.2s ease;
}

.visit-section:hover > img {
  transform: scale(1.06);
}

.visit-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(7, 11, 20, 0.96) 0%, rgba(7, 11, 20, 0.83) 42%, rgba(7, 11, 20, 0.18) 76%);
}

.visit-content {
  position: relative;
  display: flex;
  min-height: 720px;
  flex-direction: column;
  justify-content: center;
}

.visit-content h2 {
  max-width: 730px;
}

.visit-content > p:not(.section-index):not(.visit-note) {
  max-width: 650px;
  margin: 26px 0 0;
  color: #d5deea;
  font-size: 17px;
}

.visit-points {
  display: flex;
  max-width: 720px;
  margin-top: 34px;
  flex-wrap: wrap;
  gap: 10px;
}

.visit-points span {
  padding: 8px 12px;
  color: #dffbff;
  border: 1px solid rgba(196, 181, 253, 0.5);
  border-radius: 4px;
  background: rgba(122, 29, 161, 0.2);
  font-size: 13px;
}

.visit-note {
  margin: 26px 0 0;
  color: #94a3b8;
  font-size: 12px;
}

.community-section {
  position: relative;
  overflow: hidden;
  color: var(--text-muted-on-purple);
  background: linear-gradient(180deg, var(--purple-darker) 0%, var(--purple-primary) 40%, var(--purple-darker) 100%);
}

.community-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(ellipse at 20% 20%, rgba(196, 181, 253, 0.12) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(155, 59, 201, 0.15) 0%, transparent 50%);
  pointer-events: none;
}

.community-layout {
  display: grid;
  grid-template-columns: minmax(320px, 0.8fr) minmax(450px, 1.2fr);
  align-items: center;
  gap: 50px 80px;
}

.community-copy {
  position: relative;
  z-index: 2;
  color: var(--text-muted-on-purple);
}

.community-copy h2 {
  color: var(--text-white);
  font-size: clamp(36px, 4vw, 55px);
}

.community-copy p {
  color: rgba(255, 255, 255, 0.85);
}

.community-actions {
  display: flex;
  margin-top: 32px;
  gap: 10px;
}

.community-actions .button-primary {
  border: 2px solid rgba(196, 181, 253, 0.6);
  box-shadow: 
    0 8px 24px rgba(122, 29, 161, 0.3),
    0 0 0 1px rgba(196, 181, 253, 0.2);
}

.community-actions .button-primary:hover {
  border-color: var(--accent-glow);
  box-shadow: 
    0 12px 32px rgba(122, 29, 161, 0.4),
    0 0 0 1px rgba(196, 181, 253, 0.3);
}

.network {
  position: relative;
  min-height: 520px;
}

.network::before,
.network::after {
  position: absolute;
  top: 50%;
  left: 50%;
  content: "";
  border: 1px solid rgba(196, 181, 253, 0.18);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  animation: orbit 20s linear infinite;
}

.network::before {
  width: 280px;
  height: 280px;
  animation-duration: 15s;
}

.network::after {
  width: 400px;
  height: 400px;
  animation-duration: 25s;
  border-color: rgba(155, 59, 201, 0.12);
}

@keyframes orbit {
  from { transform: translate(-50%, -50%) rotate(0deg); }
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

.network-core,
.network-node {
  position: absolute;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.network-core {
  top: 50%;
  left: 50%;
  width: 160px;
  height: 160px;
  flex-direction: column;
  color: var(--white);
  background: linear-gradient(135deg, var(--purple-darker) 0%, var(--purple-primary) 50%, var(--purple-darker) 100%);
  box-shadow: 
    0 0 0 20px rgba(196, 181, 253, 0.12),
    0 0 0 40px rgba(155, 59, 201, 0.06),
    0 0 60px rgba(122, 29, 161, 0.3),
    0 24px 60px rgba(67, 14, 87, 0.5);
  transform: translate(-50%, -50%);
  animation: pulse-purple 3s ease-in-out infinite;
}

@keyframes pulse-purple {
  0%, 100% { 
    box-shadow: 
      0 0 0 20px rgba(196, 181, 253, 0.1),
      0 0 0 40px rgba(155, 59, 201, 0.05),
      0 0 60px rgba(122, 29, 161, 0.25),
      0 24px 60px rgba(67, 14, 87, 0.4);
  }
  50% { 
    box-shadow: 
      0 0 0 28px rgba(196, 181, 253, 0.15),
      0 0 0 52px rgba(155, 59, 201, 0.08),
      0 0 85px rgba(122, 29, 161, 0.35),
      0 24px 80px rgba(67, 14, 87, 0.5);
  }
}

.network-core::before {
  content: "";
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(196, 181, 253, 0.4) 0%, transparent 50%);
}

.network-core strong {
  position: relative;
  z-index: 1;
  font-size: 28px;
  font-weight: 750;
  text-shadow: 0 0 25px rgba(196, 181, 253, 0.6);
}

.network-core span {
  position: relative;
  z-index: 1;
  color: var(--accent-glow);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.network-node {
  width: 100px;
  height: 100px;
  color: var(--white);
  border: 2px solid rgba(196, 181, 253, 0.3);
  background: linear-gradient(145deg, rgba(122, 29, 161, 0.3) 0%, rgba(93, 20, 122, 0.4) 100%);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.05em;
  box-shadow: 
    0 10px 30px rgba(67, 14, 87, 0.25),
    inset 0 1px 2px rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(8px);
}

.network-node::before {
  content: "";
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(196, 181, 253, 0.3) 0%, transparent 50%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.network-node.active,
.network-node:hover {
  color: var(--white);
  border-color: var(--accent-glow);
  background: linear-gradient(145deg, var(--purple-primary) 0%, var(--purple-light) 100%);
  box-shadow: 
    0 15px 40px rgba(122, 29, 161, 0.4),
    0 0 30px rgba(196, 181, 253, 0.3),
    inset 0 1px 2px rgba(255, 255, 255, 0.2);
  transform: translateY(-5px) scale(1.05);
}

.network-node.active::before,
.network-node:hover::before {
  opacity: 1;
}

.node-1 { top: 1%; left: 50%; transform: translateX(-50%); animation: float1 4s ease-in-out infinite; }
.node-2 { top: 25%; right: 1%; animation: float2 5s ease-in-out infinite; }
.node-3 { right: 15%; bottom: 1%; animation: float3 4.5s ease-in-out infinite; }
.node-4 { bottom: 1%; left: 15%; animation: float4 5.5s ease-in-out infinite; }
.node-5 { top: 25%; left: 1%; animation: float5 4.8s ease-in-out infinite; }

@keyframes float1 {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(-10px); }
}

@keyframes float2 {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

@keyframes float3 {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

@keyframes float4 {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-9px); }
}

@keyframes float5 {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-11px); }
}

.network-line {
  position: absolute;
  z-index: 1;
  top: 50%;
  left: 50%;
  width: 170px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-glow) 0%, rgba(196, 181, 253, 0.5) 50%, transparent 100%);
  transform-origin: left center;
  box-shadow: 0 0 10px rgba(196, 181, 253, 0.4);
}

.line-1 { transform: rotate(-90deg); }
.line-2 { transform: rotate(-20deg); }
.line-3 { transform: rotate(52deg); }
.line-4 { transform: rotate(128deg); }
.line-5 { transform: rotate(200deg); }

.network-line::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-glow);
  transform: translateY(-50%);
  box-shadow: 0 0 8px var(--accent-glow);
  animation: signal 2s ease-in-out infinite;
}

@keyframes signal {
  0%, 100% { opacity: 1; transform: translateY(-50%) scale(1); }
  50% { opacity: 0.5; transform: translateY(-50%) scale(1.5); }
}

.community-detail {
  grid-column: 2;
  margin-top: -72px;
  padding: 26px 32px;
  border-left: 3px solid var(--accent-glow);
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
  border-radius: 0 12px 12px 0;
  box-shadow: 0 14px 36px rgba(67, 14, 87, 0.3);
}

.community-detail span {
  color: var(--accent-glow);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.community-detail h3 {
  margin: 8px 0 12px;
  font-size: 22px;
  color: var(--white);
}

.community-detail p {
  margin: 0;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.7;
}

.outcomes-section {
  background: var(--white);
}

.outcomes-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.outcome-primary,
.outcome-secondary {
  padding: 40px;
  border-top: 3px solid var(--blue);
  background: var(--paper);
}

.outcome-secondary {
  border-top-color: var(--accent-glow);
  background: var(--purple-dark);
  color: var(--white);
}

.outcome-primary > span,
.outcome-secondary > span {
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
}

.outcome-secondary > span {
  color: var(--accent-glow);
}

.outcome-primary ol,
.outcome-secondary ul {
  display: grid;
  margin: 28px 0 0;
  padding: 0;
  gap: 18px;
  list-style: none;
}

.outcome-primary li {
  display: grid;
  grid-template-columns: 42px 1fr;
  padding-bottom: 17px;
  align-items: center;
  border-bottom: 1px solid var(--line);
  font-weight: 700;
}

.outcome-primary li strong {
  color: var(--blue);
  font: 700 12px/1.4 ui-monospace, monospace;
}

.outcome-secondary li {
  position: relative;
  padding: 0 0 17px 22px;
  color: #d6e0ed;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.outcome-secondary li::before {
  position: absolute;
  top: 0.7em;
  left: 0;
  width: 8px;
  height: 8px;
  content: "";
  border-radius: 50%;
  background: var(--accent-glow);
}

.apply-section {
  color: var(--text-white);
  background: var(--gradient-primary);
}

.apply-layout {
  display: grid;
  grid-template-columns: minmax(300px, 0.85fr) minmax(520px, 1.15fr);
  align-items: start;
  gap: 70px;
}

.apply-copy h2 {
  margin: 0;
  font-size: clamp(35px, 4vw, 54px);
  line-height: 1.2;
}

.apply-copy > p:last-child {
  margin: 24px 0 0;
  color: #aebdd0;
}

.fee-table {
  width: 100%;
  margin-top: 24px;
  border-collapse: collapse;
}

.fee-table th,
.fee-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.fee-table th {
  color: var(--text-white);
  font-weight: 700;
  width: 80px;
}

.fee-table td {
  color: var(--text-white);
}

.fee-table td strong {
  color: var(--text-white);
  font-size: 18px;
}

.fee-table tr:last-child th,
.fee-table tr:last-child td {
  border-bottom: none;
}

.application-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  border-left: 1px solid rgba(255, 255, 255, 0.2);
}

.application-flow > div {
  display: flex;
  min-height: 120px;
  flex-direction: column;
  padding: 16px 16px;
  border-right: 1px solid rgba(255, 255, 255, 0.2);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.application-flow span {
  color: var(--accent-glow);
  font: 700 11px/1.4 ui-monospace, monospace;
}

.application-flow strong {
  margin-top: auto;
  font-size: 16px;
}

.application-flow small {
  margin-top: 4px;
  color: #94a3b8;
  font-size: 13px;
}

.apply-actions {
  display: flex;
  grid-column: 2;
  gap: 10px;
}

.apply-heading {
  display: grid;
  grid-template-columns: 1fr 0.72fr;
  align-items: end;
  gap: 80px;
}

.apply-heading > p {
  margin: 0;
  color: #aebdd0;
}

.apply-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 65px;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  border-left: 1px solid rgba(255, 255, 255, 0.2);
}

.apply-step {
  min-height: 210px;
  padding: 28px;
  border-right: 1px solid rgba(255, 255, 255, 0.2);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.apply-step span {
  color: var(--accent-glow);
  font: 700 12px/1.4 ui-monospace, monospace;
}

.apply-step h3 {
  margin: 42px 0 9px;
  font-size: 22px;
}

.apply-step p {
  margin: 0;
  color: #94a3b8;
  font-size: 14px;
}

.apply-meta {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  margin-top: 30px;
  padding: 26px 30px;
  align-items: center;
  gap: 30px;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.apply-meta span {
  display: grid;
  color: #94a3b8;
  font-size: 13px;
}

.apply-meta strong {
  color: var(--white);
  font-size: 18px;
}

.closing-section {
  padding: clamp(60px, 8vw, 95px) 0;
  text-align: center;
  color: var(--text-primary);
  background: var(--bg-white);
}

.closing-section h2 {
  margin: 0;
  font-size: clamp(20px, 2.8vw, 34px);
}

.closing-section p {
  margin: var(--spacing-md) 0 var(--spacing-lg);
  color: var(--text-secondary);
}

.closing-actions {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
}

.closing-actions .button-primary {
  background: var(--gradient-button);
  color: var(--text-white);
  box-shadow: var(--shadow-purple);
}

.closing-actions .button-primary:hover {
  background: linear-gradient(135deg, var(--purple-light) 0%, var(--purple-primary) 100%);
  box-shadow: 0 12px 32px rgba(122, 29, 161, 0.4);
}

.closing-actions .button-secondary {
  color: var(--text-white);
  border-color: rgba(196, 181, 253, 0.5);
  background: rgba(122, 29, 161, 0.2);
}

.closing-actions .button-secondary:hover {
  color: var(--text-white);
  border-color: var(--accent-glow);
  background: rgba(155, 59, 201, 0.3);
}

.site-footer {
  padding: var(--spacing-xl) clamp(24px, 4vw, 40px) var(--spacing-md);
  color: var(--text-muted-on-purple);
  background: var(--purple-darker);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 60px;
}

.footer-main {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  align-items: center;
  gap: 70px;
}

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

.footer-main .footer-brand img {
  width: 54px;
  height: 54px;
  object-fit: contain;
}

.footer-main .footer-brand strong,
.footer-main .footer-brand span {
  display: block;
}

.footer-main .footer-brand strong {
  color: var(--white);
}

.footer-main .footer-brand span {
  color: #75849a;
  font-size: 12px;
}

.footer-main nav {
  display: flex;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 12px 24px;
  font-size: 13px;
}

.footer-main nav a {
  position: relative;
  padding: 4px 0;
  color: var(--text-muted-on-purple);
  opacity: 0.82;
  transition: color 0.2s ease, opacity 0.2s ease;
}

.footer-main nav a::after {
  position: absolute;
  right: 0;
  bottom: -2px;
  left: 0;
  height: 2px;
  content: "";
  background: var(--accent-glow);
  transform: scaleX(0);
  transition: transform 0.25s ease;
}

.footer-main nav a:hover,
.footer-main nav a.active {
  color: var(--text-white);
  opacity: 1;
}

.footer-main nav a:hover::after,
.footer-main nav a.active::after {
  transform: scaleX(1);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
}

.footer-brand .brand {
  color: var(--white);
}

.footer-brand p {
  max-width: 360px;
  margin: 18px 0 0;
  font-size: 13px;
}

.footer-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-content: start;
  gap: 10px 20px;
  font-size: 14px;
}

.footer-contact {
  font-size: 14px;
}

.footer-contact strong {
  display: block;
  margin-bottom: 10px;
  color: var(--white);
}

.footer-bottom {
  margin-top: 35px;
  padding-top: 20px;
  text-align: center;
  color: #667085;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 12px;
}

.modal {
  position: fixed;
  z-index: 200;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 22px;
  background: rgba(3, 7, 18, 0.76);
  backdrop-filter: blur(8px);
}

.modal.open {
  display: flex;
}

.modal-panel {
  position: relative;
  width: min(560px, 100%);
  max-height: calc(100vh - 44px);
  overflow: auto;
  padding: 42px;
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: var(--shadow);
}

.modal-backdrop {
  position: absolute;
  inset: 0;
}

.modal-panel {
  z-index: 1;
}

.modal-label {
  margin: 0 0 8px !important;
  color: var(--text-muted-on-purple) !important;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.modal-close,
.drawer-close {
  position: absolute;
  top: 14px;
  right: 14px;
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  color: var(--text-secondary);
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--white);
  font-size: 22px;
}

.modal-panel h2 {
  margin: 0;
  font-size: 30px;
  line-height: 1.3;
}

.modal-panel > p {
  margin: 12px 0 24px;
  color: var(--text-secondary);
}

.form-grid {
  display: grid;
  gap: 16px;
}

.application-form label,
.consult-form label {
  display: grid;
  gap: 7px;
  /* color: var(--text-muted-on-purple); */
  font-size: 13px;
  font-weight: 700;
}

.application-form input:not([type="checkbox"]),
.consult-form input {
  width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  color: var(--ink);
  border: 1px solid #cbd5e1;
  border-radius: 5px;
  outline: 0;
}

.application-form input:focus,
.consult-form input:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.form-consent {
  display: flex !important;
  margin: 17px 0;
  align-items: center;
  gap: 9px;
  color: var(--text-secondary);
  font-weight: 400 !important;
}

.form-consent input {
  width: 16px;
  height: 16px;
  accent-color: var(--blue);
}

.field-error,
.form-error {
  min-height: 18px;
  color: #dc2626;
  font-size: 12px;
  font-weight: 400;
}

.form-submit,
.consult-form .button {
  width: 100%;
}

.consult-form {
  display: grid;
  gap: 14px;
}

.modal-success {
  padding: 30px 0 10px;
  text-align: center;
}

.success-mark {
  display: grid;
  width: 64px;
  height: 64px;
  margin: 0 auto 22px;
  place-items: center;
  color: #052024;
  border-radius: 50%;
  background: var(--accent-glow);
}

.success-mark svg,
.icon-button svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
}

.modal-success p {
  color: var(--text-secondary);
}

.field {
  display: grid;
  gap: 7px;
}

.field label {
  font-size: 13px;
  font-weight: 700;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  color: var(--ink);
  border: 1px solid #cbd5e1;
  border-radius: 5px;
  outline: 0;
  background: var(--white);
}

.field textarea {
  min-height: 98px;
  resize: vertical;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.form-note {
  margin: 0;
  color: var(--text-secondary);
  font-size: 12px;
}

.form-status {
  min-height: 24px;
  margin: 0;
  font-size: 13px;
}

.contact-options {
  display: grid;
  gap: 12px;
}

.contact-option {
  display: grid;
  grid-template-columns: 46px 1fr;
  padding: 16px;
  align-items: center;
  gap: 15px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
}

.contact-option-icon {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  color: var(--blue);
  border: 1px solid #bfd0ee;
  border-radius: 50%;
  background: var(--white);
  font-weight: 800;
}

.contact-option strong,
.contact-option span {
  display: block;
}

.contact-option span {
  color: var(--text-secondary);
  font-size: 13px;
}

.drawer {
  position: fixed;
  z-index: 210;
  inset: 0;
  display: none;
  background: rgba(3, 7, 18, 0.56);
}

.expert-drawer {
  position: fixed;
  z-index: 211;
  top: 0;
  right: 0;
  width: min(520px, 100%);
  height: 100%;
  overflow: auto;
  padding: 68px 46px 48px;
  background: var(--white);
  box-shadow: -18px 0 50px rgba(15, 23, 42, 0.18);
  transform: translateX(105%);
  transition: transform 0.3s ease;
}

.expert-drawer.open {
  transform: translateX(0);
}

.drawer-backdrop {
  position: fixed;
  z-index: 210;
  inset: 0;
  visibility: hidden;
  background: rgba(3, 7, 18, 0.58);
  opacity: 0;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.drawer-backdrop.open {
  visibility: visible;
  opacity: 1;
}

.expert-drawer .drawer-close {
  position: absolute;
}

.expert-drawer-profile {
  display: grid;
  grid-template-columns: 112px 1fr;
  align-items: end;
  gap: 24px;
}

.expert-drawer-profile img {
  width: 112px;
  height: 138px;
  object-fit: cover;
}

.expert-drawer-profile h2 {
  margin: 0;
  font-size: 32px;
}

.expert-drawer-profile span {
  color: var(--blue);
  font-weight: 700;
}

.expert-drawer-body {
  margin-top: 34px;
  color: #475569;
}

.expert-drawer-body h3 {
  margin: 28px 0 8px;
  color: var(--ink);
  font-size: 17px;
}

.drawer.open {
  display: block;
}

.drawer-panel {
  position: absolute;
  top: 0;
  right: 0;
  width: min(520px, 100%);
  height: 100%;
  overflow: auto;
  padding: 64px 46px;
  background: var(--white);
  box-shadow: -18px 0 50px rgba(15, 23, 42, 0.18);
}

.drawer-profile {
  display: grid;
  grid-template-columns: 110px 1fr;
  align-items: end;
  gap: 24px;
}

.drawer-profile img {
  width: 110px;
  height: 130px;
  object-fit: cover;
}

.drawer-profile h2 {
  margin: 0;
  font-size: 32px;
}

.drawer-profile span {
  color: var(--blue);
  font-weight: 700;
}

.drawer-body {
  margin-top: 34px;
  color: #475569;
}

.drawer-body h3 {
  margin: 28px 0 8px;
  color: var(--ink);
  font-size: 17px;
}

.mobile-action-bar {
  display: none;
}

.mobile-action-bar button {
  min-height: 48px;
  color: var(--ink);
  border: 1px solid #b7c7e6;
  border-radius: 5px;
  background: var(--white);
  font-weight: 800;
}

.mobile-action-bar button:last-child {
  color: var(--text-white);
  border-color: var(--purple-primary);
  background: var(--gradient-button);
}

.page-hero {
  padding: 150px 0 82px;
  color: var(--text-white);
  background:
    linear-gradient(115deg, rgba(7, 11, 20, 0.98), rgba(12, 19, 34, 0.86)),
    url("../images/hero-anthropic-ai.webp") center / cover;
}

.page-hero p {
  max-width: 720px;
  margin: 20px 0 0;
  color: var(--text-muted);
  font-size: 17px;
}

.page-content {
  padding: 90px 0 110px;
  background: var(--bg-paper);
}

.apply-page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.72fr);
  align-items: start;
  gap: 70px;
}

.content-intro {
  max-width: 760px;
  margin-bottom: 56px;
}

.content-intro h2 {
  margin: 0;
  font-size: clamp(31px, 3.5vw, 46px);
  line-height: 1.25;
}

.content-intro p {
  color: var(--text-secondary);
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.detail-item {
  padding: 34px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transition: background 0.25s ease, transform 0.25s ease;
}

.detail-item:hover {
  background: linear-gradient(135deg, rgba(122, 29, 161, 0.04) 0%, rgba(155, 59, 201, 0.02) 100%);
  transform: translateY(-2px);
}

.detail-item span {
  display: inline-block;
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
  transition: color 0.25s ease, transform 0.25s ease;
}

.detail-item:hover span {
  color: var(--purple-primary);
  transform: scale(1.08);
}

.detail-item h3 {
  margin: 10px 0;
  font-size: 23px;
}

.detail-item p,
.detail-item li {
  color: var(--text-secondary);
}

.detail-item ul {
  padding-left: 20px;
}

.content-band {
  padding: 80px 0;
  color: var(--white);
  background: var(--purple-dark);
}

.content-band h2 {
  margin: 0 0 28px;
  font-size: clamp(30px, 3vw, 44px);
}

.content-band .detail-grid {
  border-color: rgba(255, 255, 255, 0.18);
}

.content-band .detail-item {
  border-color: rgba(255, 255, 255, 0.18);
}

.content-band .detail-item p,
.content-band .detail-item li {
  color: #bdc9d8;
}

.simple-cta {
  padding: 80px 0;
  text-align: center;
  background: var(--paper);
}

.simple-cta h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 48px);
}

.simple-cta p {
  margin: 14px 0 28px;
  color: var(--text-secondary);
}

/* 个人中心 */
.account-layout {
  max-width: 760px;
  margin: 0 auto;
}

.account-guest {
  padding: 64px clamp(24px, 6vw, 56px);
  text-align: center;
  border: 1px solid var(--line);
  background: var(--white);
}

.account-guest h2 {
  margin: 0 0 12px;
  font-size: clamp(24px, 3vw, 30px);
}

.account-guest p {
  max-width: 480px;
  margin: 0 auto 28px;
  color: var(--text-secondary);
}

.account-header {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 28px;
  margin-bottom: 24px;
  border: 1px solid var(--line);
  background: var(--white);
}

.account-avatar {
  display: grid;
  flex: 0 0 auto;
  width: 64px;
  height: 64px;
  place-items: center;
  border-radius: 50%;
  background: var(--gradient-button);
  color: var(--white);
  font-size: 20px;
  font-weight: 800;
}

.account-header-info {
  display: grid;
  flex: 1;
  gap: 4px;
}

.account-header-info strong {
  font-size: 19px;
}

.account-header-info span {
  color: var(--text-secondary);
  font-size: 13px;
}

.account-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

.account-card {
  padding: 28px;
  border: 1px solid var(--line);
  background: var(--white);
  transition: box-shadow 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
}

.account-card:hover {
  border-color: var(--purple-primary);
  box-shadow: 0 12px 32px rgba(122, 29, 161, 0.08);
  transform: translateY(-3px);
}

.account-card-title {
  margin: 0 0 18px;
  color: var(--purple-primary);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.account-field {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}

.account-field:last-child {
  border-bottom: 0;
}

.account-field span {
  color: var(--text-secondary);
}

.account-field strong {
  font-weight: 600;
  color: var(--text-primary);
}

.account-field strong.empty {
  color: var(--text-muted);
  font-weight: 400;
  font-style: italic;
}

.account-reg-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}

.account-reg-item:last-child {
  border-bottom: 0;
}

.account-reg-name {
  font-size: 14px;
  font-weight: 700;
}

.account-reg-meta {
  margin-top: 3px;
  color: var(--text-muted);
  font-size: 12px;
}

.account-reg-status {
  flex-shrink: 0;
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.account-reg-status.pending {
  color: #b45309;
  background: #fef3c7;
}

.account-reg-status.confirmed {
  color: #15803d;
  background: #dcfce7;
}

.account-reg-status.completed {
  color: var(--purple-primary);
  background: var(--bg-gray);
}

.account-empty {
  padding: 32px 0;
  text-align: center;
  color: var(--text-muted);
}

.account-empty a {
  color: var(--purple-primary);
  font-weight: 700;
}

.account-actions {
  display: flex;
  justify-content: flex-end;
}

.button-danger {
  color: #dc2626;
  border-color: #fecaca;
}

.button-danger:hover {
  color: #dc2626;
  background: #fef2f2;
  border-color: #fecaca;
}

.login-steps {
  display: flex;
  gap: 8px;
  margin: 20px 0 24px;
}

.login-step {
  flex: 1;
  padding: 0 0 8px;
  border-bottom: 2px solid var(--line);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 700;
  text-align: center;
}

.login-step.active,
.login-step.done {
  border-color: var(--purple-primary);
  color: var(--purple-primary);
}

@media (max-width: 640px) {
  .account-cards {
    grid-template-columns: 1fr;
  }

  .account-header {
    flex-wrap: wrap;
    text-align: center;
    justify-content: center;
  }

  .account-header-info {
    text-align: left;
  }
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

/* 网格内逐项错峰显现 */
.detail-grid .reveal:nth-child(1),
.expert-list .expert-card:nth-child(1) {
  transition-delay: 0s;
}

.detail-grid .reveal:nth-child(2),
.expert-list .expert-card:nth-child(2) {
  transition-delay: 0.08s;
}

.detail-grid .reveal:nth-child(3),
.expert-list .expert-card:nth-child(3) {
  transition-delay: 0.16s;
}

.detail-grid .reveal:nth-child(4),
.expert-list .expert-card:nth-child(4) {
  transition-delay: 0.24s;
}

.detail-grid .reveal:nth-child(5),
.expert-list .expert-card:nth-child(5) {
  transition-delay: 0.32s;
}

.detail-grid .reveal:nth-child(6),
.expert-list .expert-card:nth-child(6) {
  transition-delay: 0.4s;
}

@media (max-width: 1120px) {
  .desktop-nav {
    gap: 15px;
  }

  .desktop-nav a {
    font-size: 12px;
  }

  .brand,
  .header-actions {
    min-width: 210px;
  }

  .brand-text {
    max-width: 150px;
  }

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

@media (max-width: 900px) {
  :root {
    --header-height: 66px;
  }

  .container {
    padding-left: clamp(20px, 3vw, 32px);
    padding-right: clamp(20px, 3vw, 32px);
  }

  .site-header {
    padding: 0 18px;
  }

  .desktop-nav,
  .header-actions {
    display: none;
  }

  .brand {
    min-width: 0;
    margin-right: auto;
  }

  .brand img {
    width: 40px;
    height: 40px;
  }

  .menu-button {
    display: block;
  }

  .hero {
    min-height: 820px;
  }

  .hero-media {
    inset: 0;
    background-position: 62% center;
    mask-image: linear-gradient(to bottom, #000 0%, #000 38%, transparent 78%);
    opacity: 0.58;
  }

  .hero::before {
    background: linear-gradient(to bottom, rgba(7, 11, 20, 0.28) 0%, rgba(7, 11, 20, 0.82) 40%, rgba(7, 11, 20, 1) 78%);
  }

  .hero-inner {
    min-height: 720px;
    align-items: flex-end;
    padding: 160px 0 132px;
  }

  .hero-copy {
    width: 100%;
  }

  .hero h1 {
    font-size: clamp(44px, 11vw, 68px);
  }

  .hero-description {
    max-width: 700px;
  }

  .hero-info-bar {
    bottom: 104px;
    padding: 12px 0;
  }

  .hero-info-content {
    gap: 24px;
  }

  .info-item {
    gap: 10px;
    padding: 8px 18px;
  }

  .info-icon {
    font-size: 18px;
  }

  .info-label {
    font-size: 12px;
  }

  .info-value {
    font-size: 14px;
  }

  .proof-wrapper {
    gap: 8px 12px;
    max-width: 100%;
  }

  .proof-item {
    padding: 6px 10px;
    flex: 1 0 calc(50% - 6px);
    min-width: calc(50% - 6px);
  }

  .proof-wrapper .proof-item:nth-child(3) {
    flex: 1 0 100%;
    min-width: 100%;
    justify-content: center;
  }

  .proof-number {
    font-size: 13px;
  }

  .proof-label {
    font-size: 11px;
  }

  .section {
    padding: 84px 0;
  }

  .split-heading,
  .apply-heading,
  .community-layout,
  .apply-layout,
  .apply-page-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .split-heading > p {
    max-width: 720px;
  }

  .curriculum-layout {
    grid-template-columns: 1fr;
  }

  .course-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    border-right: 0;
    border-bottom: 1px solid #cdd7e5;
  }

  .course-tab {
    min-height: 104px;
    padding: 20px;
    border-right: 1px solid #cdd7e5;
  }

  .course-tab:nth-child(2) {
    border-right: 0;
  }

  .course-panel {
    min-height: 390px;
  }

  .curriculum-output {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .community-layout {
    gap: 10px;
  }

  .community-detail {
    grid-column: 1;
    margin-top: -30px;
  }

  .apply-steps {
    grid-template-columns: 1fr 1fr;
  }

  .apply-actions {
    grid-column: 1;
  }

  .apply-page-layout .modal-panel {
    position: static !important;
    width: 100%;
  }

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

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

  .footer-main nav {
    justify-content: flex-start;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  body {
    padding-bottom: 66px;
  }

  .container {
    padding-left: clamp(16px, 4vw, 24px);
    padding-right: clamp(16px, 4vw, 24px);
  }

  .brand-text {
    max-width: 180px;
  }

  .brand-text strong,
  .brand-text span {
    font-size: 12px;
  }

  .mobile-menu-actions {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: 790px;
  }

  .hero-inner {
    min-height: 700px;
    padding-bottom: 128px;
  }

  .hero h1 {
    font-size: clamp(40px, 12vw, 58px);
  }

  .hero-slogan {
    font-size: 20px;
  }

  .hero-description {
    font-size: 15px;
    line-height: 1.75;
  }

  .hero-actions,
  .closing-actions,
  .community-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .hero-actions .button,
  .closing-actions .button,
  .community-actions .button {
    width: 100%;
  }

  .hero-info-bar {
    bottom: 96px;
    padding: 10px 0;
  }

  .hero-info-content {
    flex-wrap: wrap;
    gap: 12px;
    justify-content: flex-start;
  }

  .info-item {
    gap: 8px;
    padding: 6px 14px;
    flex: 1;
    min-width: calc(50% - 6px);
  }

  .info-icon {
    font-size: 16px;
  }

  .info-label {
    font-size: 11px;
  }

  .info-value {
    font-size: 13px;
  }

  .info-divider {
    display: none;
  }

  .hero-proof {
    bottom: 0;
  }

  .proof-row {
    gap: 10px;
  }

  .proof-row-secondary {
    gap: 16px;
  }

  .proof-item {
    padding: 8px 14px;
    min-width: 130px;
  }

  .proof-item strong {
    min-width: 36px;
    height: 36px;
    font-size: 17px;
  }

  .proof-item span {
    font-size: 13px;
  }

  .section {
    padding: 70px 0;
  }

  .section-heading,
  .split-heading {
    margin-bottom: 42px;
  }

  .section h2,
  .visit-section h2,
  .page-hero h1 {
    font-size: 34px;
  }

  .value-item {
    grid-template-columns: 42px 1fr;
    padding: 28px 0;
  }

  .value-item h3 {
    font-size: 23px;
  }

  .course-tabs {
    grid-template-columns: 1fr;
  }

  .course-tab {
    min-height: 84px;
    border-right: 0;
  }

  .course-panel {
    min-height: 420px;
    padding: 34px 24px;
  }

  .course-panel h3 {
    font-size: 27px;
  }

  .course-deliverable {
    grid-template-columns: 1fr;
    gap: 7px;
  }

  .expert-list,
  .outcomes-grid,
  .detail-grid {
    grid-template-columns: 1fr;
  }

  .expert-card {
    grid-template-columns: 68px minmax(0, 1fr) auto;
    min-height: 136px;
    padding: 18px 12px;
    gap: 13px;
  }

  .expert-card img {
    width: 68px;
    height: 86px;
  }

  .expert-info strong {
    font-size: 18px;
  }

  .expert-title {
    font-size: 12px;
  }

  .expert-info > small {
    font-size: 10px;
  }

  .expert-role {
    padding-left: 5px;
    font-size: 10px;
  }

  .visit-section,
  .visit-content {
    min-height: 690px;
  }

  .visit-section > img {
    object-position: 62% center;
  }

  .network {
    min-height: 430px;
    transform: scale(0.86);
    margin: -28px -30px;
  }

  .network::before {
    width: 270px;
    height: 270px;
  }

  .network::after {
    width: 365px;
    height: 365px;
  }

  .network-line {
    width: 126px;
  }

  .community-detail {
    margin-top: 0;
  }

  .outcome-primary,
  .outcome-secondary {
    padding: 28px 22px;
  }

  .apply-steps,
  .apply-meta,
  .footer-grid,
  .application-flow {
    grid-template-columns: 1fr;
  }

  .application-flow > div {
    min-height: 124px;
  }

  .apply-actions {
    display: grid;
  }

  .footer-bottom {
    gap: 12px;
    text-align: left;
    flex-direction: column;
  }

  .apply-step {
    min-height: 160px;
  }

  .apply-step h3 {
    margin-top: 24px;
  }

  .footer-brand {
    grid-column: auto;
  }

  .modal-panel {
    padding: 38px 22px 24px;
  }

  .drawer-panel {
    padding: 62px 24px 34px;
  }

  .drawer-profile {
    grid-template-columns: 86px 1fr;
  }

  .drawer-profile img {
    width: 86px;
    height: 104px;
  }

  .mobile-action-bar {
    position: fixed;
    z-index: 80;
    right: 0;
    bottom: 0;
    left: 0;
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    padding: 9px 12px;
    gap: 8px;
    border-top: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(12px);
  }

  .mobile-action-bar .button {
    min-height: 48px;
  }

  .page-hero {
    padding: 120px 0 64px;
  }

  .page-content {
    padding: 65px 0 80px;
  }

}

@media (max-width: 420px) {
  .site-header {
    padding: 0 12px;
  }

  .brand {
    gap: 7px;
  }

  .brand img {
    width: 36px;
    height: 36px;
  }

  .brand-text {
    max-width: 148px;
  }
}

.expert-detail-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.45fr) minmax(500px, 1fr);
  gap: 48px;
  padding: 40px;
  background: var(--white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-primary);
}

.expert-detail-sidebar {
  position: sticky;
  top: calc(var(--header-height) + 40px);
}

.expert-detail-photo {
  width: 100%;
  height: auto;
  max-height: 420px;
  object-fit: cover;
  object-position: top center;
  border-radius: 12px;
  filter: grayscale(10%);
}

.expert-detail-role {
  display: inline-block;
  margin-top: 16px;
  padding: 8px 16px;
  color: var(--purple-primary);
  border: 1px solid var(--purple-primary);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.expert-detail-header {
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-light);
}

.expert-detail-header h2 {
  margin: 0;
  font-size: 36px;
  font-weight: 750;
}

.expert-detail-header h2 small {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  margin-left: 8px;
}

.expert-detail-position {
  display: block;
  margin-top: 8px;
  color: var(--purple-primary);
  font-size: 16px;
  font-weight: 700;
}

.expert-detail-main > div {
  margin-top: 32px;
}

.expert-detail-main h3 {
  margin: 0 0 16px;
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}

.expert-detail-titles {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 24px;
  background: linear-gradient(135deg, rgba(122, 29, 161, 0.06) 0%, rgba(155, 59, 201, 0.04) 100%);
  border: 1px solid rgba(122, 29, 161, 0.12);
  border-radius: 14px;
}

.title-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 6px 0;
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.7;
}

.title-badge {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--purple-primary);
  font-size: 11px;
  line-height: 1;
}

.expert-detail-bio p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.85;
}

.expert-detail-highlights {
  padding: 24px;
  background: linear-gradient(135deg, rgba(122, 29, 161, 0.03) 0%, rgba(155, 59, 201, 0.02) 100%);
  border-radius: 12px;
}

.expert-detail-highlights h3 {
  margin: 0 0 18px;
  padding-left: 8px;
  border-left: 3px solid var(--accent-glow);
}

.highlight-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
}

.highlight-dot {
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  margin-top: 7px;
  background: var(--purple-primary);
  border-radius: 50%;
}

.expert-detail-focus {
  margin-bottom: 40px;
}

.focus-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.focus-tag {
  padding: 8px 16px;
  color: var(--purple-primary);
  border: 1px solid rgba(122, 29, 161, 0.25);
  border-radius: 100px;
  background: rgba(122, 29, 161, 0.06);
  font-size: 13px;
  font-weight: 600;
  transition: all 0.25s ease;
}

.focus-tag:hover {
  color: var(--text-white);
  background: var(--purple-primary);
  border-color: var(--purple-primary);
}

.expert-detail-cta {
  padding-top: 24px;
  border-top: 1px solid var(--border-light);
}

.expert-detail-cta .button-primary {
  width: 100%;
  max-width: 280px;
}

@media (max-width: 1024px) {
  .expert-detail-layout {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 28px;
  }

  .expert-detail-sidebar {
    position: static;
  }

  .expert-detail-photo {
    max-height: 320px;
  }
}

@media (max-width: 640px) {
  .expert-detail-layout {
    padding: 20px;
    gap: 24px;
  }

  .expert-detail-header h2 {
    font-size: 28px;
  }

  .expert-detail-position {
    font-size: 14px;
  }

  .expert-detail-main > div {
    margin-top: 24px;
  }

  .expert-detail-main h3 {
    font-size: 16px;
  }

  .expert-detail-bio p {
    font-size: 14px;
  }

  .highlight-item {
    font-size: 13px;
  }

  .focus-tag {
    padding: 6px 12px;
    font-size: 12px;
  }

  .expert-detail-cta .button-primary {
    width: 100%;
    max-width: none;
  }

  .expert-list .expert-card {
    cursor: pointer;
  }

  .brand-text strong{
    font-size: 14px;
  }
  .brand-text span {
    font-size: 12px;
  }

  .hero {
    min-height: 760px;
  }

  .hero-inner {
    min-height: 675px;
  }

  .hero h1 {
    font-size: 39px;
  }

  .hero-copy::before {
    margin-bottom: 18px;
  }

  .course-tab strong {
    font-size: 18px;
  }

  .expert-card {
    grid-template-columns: 62px minmax(0, 1fr);
  }

  .expert-card img {
    width: 62px;
    height: 80px;
  }

  .expert-role {
    display: none;
  }

  .network {
    margin-right: -48px;
    margin-left: -48px;
    transform: scale(0.78);
  }

  .modal-panel h2 {
    font-size: 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}