:root {
      --navy-900: #07152A;
      --navy-800: #0B1F3A;
      --navy-700: #112B52;
      --navy-600: #1A3A6B;
      --navy-500: #244B84;
      --copper-500: #C68A3D;
      --copper-400: #D9A25A;
      --copper-300: #E8BD7E;
      --electric-blue: #3B82F6;
      --electric-blue-light: #60A5FA;
      --slate-50: #F5F7FA;
      --slate-100: #E8ECF2;
      --slate-200: #C9D1DC;
      --slate-400: #8592A6;
      --slate-600: #4B5870;
      --slate-800: #1F2A3D;
      --white: #FFFFFF;
      --font-serif: "Noto Serif SC", "Source Han Serif SC", serif;
      --font-sans: "Noto Sans SC", "Source Han Sans SC", -apple-system, BlinkMacSystemFont, sans-serif;
      --font-mono: "JetBrains Mono", ui-monospace, monospace;
      --container: 1200px;
      --radius-sm: 4px;
      --radius-md: 10px;
      --radius-lg: 18px;
      --ease: cubic-bezier(0.22, 1, 0.36, 1);
    }

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

    html { scroll-behavior: smooth; }

    body {
      font-family: var(--font-sans);
      font-size: 16px;
      line-height: 1.65;
      color: var(--slate-800);
      background: var(--white);
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      overflow-x: hidden;
    }

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

    a { color: inherit; text-decoration: none; }
    button { font-family: inherit; cursor: pointer; border: none; background: none; }

    .container {
      max-width: var(--container);
      margin: 0 auto;
      padding: 0 32px;
    }

    /* ======= UTILITIES ======= */
    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-family: var(--font-mono);
      font-size: 12px;
      font-weight: 500;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      color: var(--copper-500);
    }
    .eyebrow::before {
      content: "";
      display: inline-block;
      width: 32px;
      height: 1px;
      background: var(--copper-500);
    }

    .section-title {
      font-family: var(--font-serif);
      font-size: 40px;
      font-weight: 600;
      line-height: 1.25;
      color: var(--navy-800);
      letter-spacing: -0.01em;
    }
    .section-subtitle {
      font-size: 17px;
      color: var(--slate-600);
      max-width: 600px;
      line-height: 1.7;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      height: 48px;
      padding: 0 24px;
      font-size: 15px;
      font-weight: 500;
      border-radius: var(--radius-sm);
      transition: all 0.3s var(--ease);
      white-space: nowrap;
    }
    .btn-primary {
      background: var(--copper-500);
      color: var(--white);
      box-shadow: 0 4px 20px rgba(198, 138, 61, 0.3);
    }
    .btn-primary:hover {
      background: var(--copper-400);
      transform: translateY(-1px);
      box-shadow: 0 6px 24px rgba(198, 138, 61, 0.4);
    }
    .btn-ghost-light {
      border: 1px solid rgba(255,255,255,0.3);
      color: var(--white);
    }
    .btn-ghost-light:hover {
      border-color: var(--white);
      background: rgba(255,255,255,0.08);
    }
    .btn-ghost-dark {
      border: 1px solid var(--navy-700);
      color: var(--navy-700);
    }
    .btn-ghost-dark:hover {
      background: var(--navy-700);
      color: var(--white);
    }
    .btn-outline-navy {
      border: 1.5px solid var(--navy-700);
      color: var(--navy-700);
      background: transparent;
    }
    .btn-outline-navy:hover {
      background: var(--navy-700);
      color: white;
    }
    .btn-outline-copper {
      border: 1.5px solid var(--copper-500);
      color: var(--copper-500);
      background: transparent;
    }
    .btn-outline-copper:hover {
      background: var(--copper-500);
      color: white;
      border-color: var(--copper-500);
    }

    /* ======= NAV ======= */
    .nav {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 100;
      padding: 18px 0;
      transition: all 0.3s var(--ease);
    }
    .nav.scrolled {
      background: rgba(7, 21, 42, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      padding: 12px 0;
      box-shadow: 0 1px 0 rgba(255,255,255,0.06);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-family: var(--font-serif);
      font-size: 20px;
      font-weight: 700;
      color: var(--white);
      letter-spacing: 0.02em;
    }
    .logo-img {
      height: 36px;
      width: auto;
      display: block;
      object-fit: contain;
    }
    .logo-mark {
      width: 36px;
      height: 36px;
      position: relative;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 36px;
    }
    .nav-link {
      font-size: 14px;
      font-weight: 500;
      color: rgba(255,255,255,0.75);
      transition: color 0.2s;
      position: relative;
    }
    .nav-link:hover { color: var(--white); }
    .nav-link.active { color: var(--copper-400); }
    .nav-link.active::after {
      content: "";
      position: absolute;
      bottom: -6px;
      left: 0;
      right: 0;
      height: 2px;
      background: var(--copper-500);
      border-radius: 1px;
    }
    .nav-cta {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .nav-hamburger {
      display: none;
      width: 44px;
      height: 44px;
      align-items: center;
      justify-content: center;
      color: white;
      border-radius: 8px;
      flex-shrink: 0;
    }
    .mobile-menu {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: rgba(7, 21, 42, 0.98);
      z-index: 99;
      flex-direction: column;
      padding: 100px 32px 40px;
      gap: 8px;
    }
    .mobile-menu.open { display: flex; }
    .mobile-menu a {
      padding: 16px 0;
      font-size: 20px;
      color: white;
      border-bottom: 1px solid rgba(255,255,255,0.08);
      min-height: 56px;
      display: flex;
      align-items: center;
    }
    .mobile-menu-close {
      position: absolute;
      top: 20px;
      right: 20px;
      width: 44px;
      height: 44px;
      color: white;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 8px;
    }

    body.menu-open { overflow: hidden; }

    /* ======= HERO ======= */
    .hero {
      position: relative;
      min-height: 100vh;
      background: linear-gradient(160deg, var(--navy-900) 0%, var(--navy-800) 50%, var(--navy-700) 100%);
      color: var(--white);
      overflow: hidden;
      display: flex;
      align-items: center;
      padding: 120px 0 80px;
    }
    .hero-bg-grid {
      position: absolute;
      inset: 0;
      background-image:
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
      background-size: 60px 60px;
      mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
      -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
    }
    .hero-glow {
      position: absolute;
      width: 600px;
      height: 600px;
      border-radius: 50%;
      filter: blur(120px);
      opacity: 0.25;
      pointer-events: none;
    }
    .hero-glow.copper {
      background: var(--copper-500);
      top: -200px;
      right: -100px;
    }
    .hero-glow.blue {
      background: var(--electric-blue);
      bottom: -200px;
      left: -150px;
      opacity: 0.15;
    }
    .hero-inner {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 80px;
      align-items: center;
    }
    .hero-content .eyebrow { color: var(--copper-400); }
    .hero-content .eyebrow::before { background: var(--copper-400); }
    .hero-title {
      font-family: var(--font-serif);
      font-size: 56px;
      font-weight: 600;
      line-height: 1.2;
      margin: 20px 0 24px;
      letter-spacing: -0.02em;
    }
    .hero-title .accent {
      background: linear-gradient(135deg, var(--copper-400), var(--copper-300));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero-subtitle {
      font-size: 18px;
      color: rgba(255,255,255,0.7);
      line-height: 1.75;
      max-width: 540px;
      margin-bottom: 36px;
    }
    .hero-ctas {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .hero-meta {
      display: flex;
      gap: 40px;
      margin-top: 56px;
      padding-top: 28px;
      border-top: 1px solid rgba(255,255,255,0.1);
    }
    .hero-meta-item .num {
      font-family: var(--font-serif);
      font-size: 32px;
      font-weight: 600;
      color: var(--copper-400);
      line-height: 1;
    }
    .hero-meta-item .label {
      font-size: 13px;
      color: rgba(255,255,255,0.55);
      margin-top: 6px;
    }

    /* Hero visual */
    .hero-visual {
      position: relative;
      aspect-ratio: 4/5;
      max-width: 480px;
      margin-left: auto;
    }
    .hero-visual-card {
      position: absolute;
      background: rgba(255,255,255,0.06);
      border: 1px solid rgba(255,255,255,0.12);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-radius: var(--radius-lg);
      padding: 24px;
      color: white;
    }
    .hv-main {
      top: 0;
      right: 0;
      width: 82%;
      aspect-ratio: 4/5;
      border-radius: var(--radius-lg);
      overflow: hidden;
      background: linear-gradient(145deg, rgba(26,58,107,0.8), rgba(11,31,58,0.9));
      border: 1px solid rgba(255,255,255,0.1);
      padding: 32px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .hv-main-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-family: var(--font-mono);
      font-size: 11px;
      letter-spacing: 0.1em;
      color: var(--copper-400);
      text-transform: uppercase;
    }
    .hv-main-tag .dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--copper-400);
      box-shadow: 0 0 8px var(--copper-400);
    }
    .hv-main-title {
      font-family: var(--font-serif);
      font-size: 28px;
      font-weight: 600;
      margin: 12px 0 8px;
      line-height: 1.3;
    }
    .hv-main-desc {
      font-size: 13px;
      color: rgba(255,255,255,0.6);
      line-height: 1.6;
    }
    .hv-main-stats {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-top: 24px;
    }
    .hv-main-stat {
      padding: 16px;
      background: rgba(255,255,255,0.04);
      border-radius: var(--radius-md);
      border: 1px solid rgba(255,255,255,0.06);
    }
    .hv-main-stat .val {
      font-family: var(--font-serif);
      font-size: 24px;
      font-weight: 600;
      color: var(--copper-300);
    }
    .hv-main-stat .lbl {
      font-size: 11px;
      color: rgba(255,255,255,0.5);
      margin-top: 4px;
    }
    .hv-main-progress {
      margin-top: 24px;
    }
    .hv-main-progress .lbl {
      display: flex;
      justify-content: space-between;
      font-size: 12px;
      color: rgba(255,255,255,0.6);
      margin-bottom: 8px;
    }
    .hv-main-progress .bar {
      height: 4px;
      background: rgba(255,255,255,0.1);
      border-radius: 2px;
      overflow: hidden;
    }
    .hv-main-progress .fill {
      height: 100%;
      background: linear-gradient(90deg, var(--copper-500), var(--copper-300));
      border-radius: 2px;
      width: 72%;
    }

    .hv-floating-1 {
      bottom: 15%;
      left: -10px;
      width: 220px;
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .hv-avatar-stack {
      display: flex;
    }
    .hv-avatar-stack div {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      border: 2px solid rgba(11,31,58,0.8);
      background: linear-gradient(135deg, var(--copper-400), var(--copper-500));
      margin-left: -10px;
    }
    .hv-avatar-img {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      border: 2px solid rgba(11,31,58,0.8);
      margin-left: -10px;
      object-fit: cover;
      display: block;
    }
    .hv-avatar-stack div:first-child { margin-left: 0; }
    .hv-floating-1-text {
      font-size: 12px;
      color: rgba(255,255,255,0.75);
    }
    .hv-floating-1-text strong {
      color: var(--white);
      font-weight: 600;
      display: block;
    }

    .hv-floating-2 {
      top: 18%;
      left: -20px;
      width: 180px;
    }
    .hv-floating-2-title {
      font-size: 11px;
      font-family: var(--font-mono);
      letter-spacing: 0.08em;
      color: rgba(255,255,255,0.5);
      text-transform: uppercase;
      margin-bottom: 10px;
    }
    .hv-bar-chart {
      display: flex;
      align-items: flex-end;
      gap: 6px;
      height: 50px;
    }
    .hv-bar {
      flex: 1;
      background: linear-gradient(180deg, var(--electric-blue-light), var(--electric-blue));
      border-radius: 2px 2px 0 0;
      opacity: 0.8;
    }

    /* Circuit lines decoration */
    .circuit-lines {
      position: absolute;
      pointer-events: none;
      opacity: 0.35;
    }

    /* ======= SECTIONS ======= */
    section { padding: 120px 0; }

    .section-header {
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-bottom: 64px;
    }
    .section-header.center {
      text-align: center;
      align-items: center;
    }
    .section-header.center .section-subtitle { text-align: center; }

    /* ======= FEATURES ======= */
    .features-section { background: var(--slate-50); }
    .features-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: var(--white);
      border: 1px solid var(--slate-100);
      border-radius: var(--radius-lg);
      padding: 36px 28px;
      transition: all 0.4s var(--ease);
      position: relative;
      overflow: hidden;
    }
    .feature-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: var(--copper-500);
      transform: scaleX(0);
      transform-origin: left;
      transition: transform 0.4s var(--ease);
    }
    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 20px 40px -15px rgba(11, 31, 58, 0.15);
      border-color: var(--copper-300);
    }
    .feature-card:hover::before { transform: scaleX(1); }
    .feature-num {
      font-family: var(--font-mono);
      font-size: 13px;
      font-weight: 500;
      color: var(--copper-500);
      margin-bottom: 20px;
      letter-spacing: 0.05em;
    }
    .feature-icon {
      width: 48px;
      height: 48px;
      margin-bottom: 24px;
      color: var(--navy-700);
    }
    .feature-title {
      font-family: var(--font-serif);
      font-size: 20px;
      font-weight: 600;
      color: var(--navy-800);
      margin-bottom: 12px;
    }
    .feature-desc {
      font-size: 14px;
      color: var(--slate-600);
      line-height: 1.7;
    }

    /* ======= COURSES ======= */
    .courses-section { background: var(--white); }
    .courses-header-row {
      display: flex;
      justify-content: space-between;
      align-items: flex-end;
      margin-bottom: 56px;
    }
    .courses-header-row .section-header { margin-bottom: 0; }
    .courses-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    .course-card {
      background: var(--white);
      border: 1px solid var(--slate-100);
      border-radius: var(--radius-lg);
      overflow: hidden;
      transition: all 0.4s var(--ease);
      cursor: pointer;
    }
    .course-card:hover {
      transform: translateY(-8px);
      box-shadow: 0 24px 48px -20px rgba(11, 31, 58, 0.2);
    }
    .course-cover {
      aspect-ratio: 16/9;
      position: relative;
      overflow: hidden;
      background: var(--navy-800);
    }
    .course-cover-img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.6s var(--ease);
    }
    .course-card:hover .course-cover-img {
      transform: scale(1.05);
    }
    .course-cover-bg {
      width: 100%;
      height: 100%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 48px;
    }
    .course-cover-bg.c1 { background: linear-gradient(135deg, #0B1F3A, #1A3A6B); }
    .course-cover-bg.c2 { background: linear-gradient(135deg, #2D1F0B, #C68A3D); }
    .course-cover-bg.c3 { background: linear-gradient(135deg, #0B2E3A, #2A6B7A); }
    .course-tag {
      position: absolute;
      top: 16px;
      left: 16px;
      padding: 4px 12px;
      background: rgba(255,255,255,0.15);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      border-radius: 20px;
      font-size: 12px;
      font-weight: 500;
      color: white;
      border: 1px solid rgba(255,255,255,0.2);
    }
    .course-body { padding: 28px 24px; }
    .course-title {
      font-family: var(--font-serif);
      font-size: 20px;
      font-weight: 600;
      color: var(--navy-800);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .course-desc {
      font-size: 14px;
      color: var(--slate-600);
      line-height: 1.65;
      margin-bottom: 20px;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }
    .course-meta {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-top: 16px;
      border-top: 1px solid var(--slate-100);
    }
    .course-meta-left {
      display: flex;
      align-items: center;
      gap: 16px;
      font-size: 13px;
      color: var(--slate-400);
    }
    .course-meta-left span {
      display: flex;
      align-items: center;
      gap: 5px;
    }
    .course-price {
      font-family: var(--font-serif);
      font-size: 22px;
      font-weight: 600;
      color: var(--copper-500);
      line-height: 1;
      display: flex;
      align-items: baseline;
      gap: 2px;
    }
    .course-price-unit {
      font-size: 14px !important;
      font-weight: 500 !important;
      font-family: var(--font-sans) !important;
      color: var(--copper-500) !important;
      opacity: 0.9;
    }
    .course-price small {
      font-size: 13px;
      color: var(--slate-400);
      font-weight: 400;
      font-family: var(--font-sans);
      margin-left: 2px;
    }

    /* Version switch */
    .version-switch {
      display: inline-flex;
      background: var(--slate-100);
      border-radius: 999px;
      padding: 4px;
      gap: 4px;
      flex-shrink: 0;
    }
    .version-switch-btn {
      padding: 8px 20px;
      border-radius: 999px;
      border: none;
      background: transparent;
      font-size: 14px;
      font-weight: 500;
      color: var(--slate-600);
      cursor: pointer;
      transition: all 0.2s ease;
      font-family: var(--font-sans);
      white-space: nowrap;
    }
    .version-switch-btn:hover {
      color: var(--navy-700);
    }
    .version-switch-btn.active {
      background: var(--navy-700);
      color: white;
      box-shadow: 0 2px 8px rgba(11, 31, 58, 0.15);
    }

    /* Course highlights & departments & target */
    .course-highlights {
      list-style: none;
      padding: 0;
      margin: 0 0 16px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .course-highlights li {
      display: flex;
      align-items: flex-start;
      gap: 8px;
      font-size: 13.5px;
      color: var(--slate-600);
      line-height: 1.5;
    }
    .course-departments {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-bottom: 16px;
    }
    .dept-chip {
      font-size: 12px;
      padding: 4px 10px;
      border-radius: 999px;
      background: rgba(198, 138, 61, 0.08);
      color: var(--copper-500);
      font-weight: 500;
      line-height: 1.4;
    }
    .course-target {
      font-size: 13px;
      color: var(--slate-600);
      margin-bottom: 18px;
      line-height: 1.6;
      padding-top: 12px;
      border-top: 1px dashed var(--slate-200);
    }
    .course-target-label {
      font-weight: 600;
      color: var(--slate-800);
    }
    .course-cta-btn {
      width: 100%;
      justify-content: center;
      padding: 12px 20px;
      font-size: 14px;
      margin-top: 4px;
    }
    .course-cta-btn svg {
      width: 16px;
      height: 16px;
    }

    /* ======= TRUST ======= */
    .trust-section {
      background: var(--navy-800);
      color: var(--white);
      position: relative;
      overflow: hidden;
    }
    .trust-section .section-title { color: var(--white); }
    .trust-section .section-subtitle { color: rgba(255,255,255,0.6); }
    .trust-bg {
      position: absolute;
      inset: 0;
      background-image:
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
      background-size: 60px 60px;
    }

    /* Stats row */
    .stats-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      margin-bottom: 80px;
      position: relative;
      z-index: 2;
    }
    .stats-row-6 {
      grid-template-columns: repeat(6, 1fr);
      gap: 0;
      margin-bottom: 72px;
    }
    .stat-item {
      text-align: center;
      padding: 32px 20px;
      border-right: 1px solid rgba(255,255,255,0.08);
    }
    .stats-row-6 .stat-item {
      padding: 24px 12px;
    }
    .stat-item:last-child { border-right: none; }
    .stats-row-6 .stat-num {
      font-size: 40px;
    }
    .stats-row-6 .stat-num .plus {
      font-size: 26px;
    }
    .stats-row-6 .stat-label {
      font-size: 13px;
      margin-top: 8px;
    }
    .stat-num {
      font-family: var(--font-serif);
      font-size: 56px;
      font-weight: 600;
      line-height: 1;
      background: linear-gradient(135deg, var(--copper-400), var(--copper-300));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .stat-num .plus {
      font-size: 36px;
      vertical-align: top;
      margin-left: 2px;
    }
    .stat-label {
      font-size: 14px;
      color: rgba(255,255,255,0.6);
      margin-top: 10px;
    }

    /* Founder card full-width */
    .founder-card-full {
      display: grid;
      grid-template-columns: 320px 1fr;
      gap: 56px;
      align-items: center;
      background: rgba(255,255,255,0.04);
      border: 1px solid rgba(255,255,255,0.08);
      border-radius: var(--radius-lg);
      padding: 48px;
      position: relative;
      z-index: 2;
    }
    .founder-photo-lg {
      width: 320px;
      height: 400px;
      border-radius: 20px;
      background: linear-gradient(135deg, var(--navy-600), var(--navy-700));
      border: 2px solid var(--copper-500);
      overflow: hidden;
      position: relative;
      box-shadow: 0 12px 40px rgba(198, 138, 61, 0.2);
    }
    .founder-name-row {
      display: flex;
      align-items: baseline;
      gap: 16px;
      margin-bottom: 16px;
    }
    .founder-title-tag {
      font-size: 14px;
      color: var(--copper-400);
      padding: 4px 12px;
      background: rgba(198, 138, 61, 0.12);
      border-radius: 999px;
      font-weight: 500;
    }
    .founder-credentials {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px 20px;
      margin-bottom: 20px;
    }
    .credential-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      color: rgba(255,255,255,0.75);
    }
    .founder-card-full .founder-bio {
      font-size: 14px;
      color: rgba(255,255,255,0.6);
      line-height: 1.8;
      margin-bottom: 20px;
    }
    .founder-card-full .founder-link {
      font-size: 14px;
      color: var(--copper-400);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .founder-card-full .founder-link:hover { color: var(--copper-300); }

    .founder-card-full .founder-name {
      font-family: var(--font-serif);
      font-size: 32px;
      font-weight: 600;
      margin-bottom: 0;
      color: white;
    }

    /* Logo wall */
    .logo-wall {
      margin-top: 80px;
      position: relative;
      z-index: 2;
    }
    .logo-wall-label {
      text-align: center;
      font-size: 13px;
      letter-spacing: 0.15em;
      text-transform: uppercase;
      color: rgba(255,255,255,0.4);
      margin-bottom: 32px;
    }
    .logo-row {
      display: flex;
      justify-content: space-around;
      align-items: center;
      flex-wrap: wrap;
      gap: 32px;
      opacity: 0.5;
    }
    .logo-item {
      font-family: var(--font-serif);
      font-size: 20px;
      font-weight: 600;
      color: rgba(255,255,255,0.6);
      padding: 12px 24px;
      letter-spacing: 0.05em;
    }

    /* ======= ENTERPRISE ======= */
    .enterprise-section { background: var(--slate-50); }
    .enterprise-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 80px;
      align-items: center;
    }
    .enterprise-visual {
      position: relative;
      aspect-ratio: 4/5;
      max-width: 500px;
    }
    .enterprise-visual-main {
      position: absolute;
      inset: 0 0 0 0;
      background: linear-gradient(145deg, var(--navy-800), var(--navy-700));
      border-radius: var(--radius-lg);
      padding: 40px;
      color: white;
      overflow: hidden;
    }
    .enterprise-visual-main::before {
      content: "";
      position: absolute;
      top: -50%;
      right: -30%;
      width: 100%;
      height: 100%;
      background: radial-gradient(circle, rgba(198,138,61,0.2), transparent 60%);
    }
    .ev-step {
      position: relative;
      z-index: 2;
      display: flex;
      gap: 20px;
      margin-bottom: 32px;
      align-items: flex-start;
    }
    .ev-step-num {
      flex-shrink: 0;
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: rgba(198, 138, 61, 0.2);
      border: 1px solid var(--copper-500);
      display: flex;
      align-items: center;
      justify-content: center;
      font-family: var(--font-mono);
      font-size: 14px;
      color: var(--copper-400);
      font-weight: 500;
    }
    .ev-step-content .title {
      font-family: var(--font-serif);
      font-size: 17px;
      font-weight: 600;
      margin-bottom: 4px;
    }
    .ev-step-content .desc {
      font-size: 13px;
      color: rgba(255,255,255,0.6);
      line-height: 1.6;
    }
    .ev-connector {
      position: absolute;
      left: 59px;
      top: 80px;
      bottom: 60px;
      width: 1px;
      background: rgba(198, 138, 61, 0.3);
      z-index: 1;
    }

    .enterprise-content h2.section-title { margin-bottom: 20px; }
    .enterprise-pain-points {
      list-style: none;
      margin: 32px 0;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .enterprise-pain-points li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 15px;
      color: var(--slate-700);
      line-height: 1.6;
    }
    .enterprise-pain-points li::before {
      content: "";
      flex-shrink: 0;
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--copper-500);
      margin-top: 10px;
    }
    .enterprise-plans {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      margin: 28px 0 36px;
    }
    .plan-card-mini {
      padding: 16px 14px;
      background: var(--white);
      border: 1px solid var(--slate-100);
      border-radius: var(--radius-md);
      text-align: center;
    }
    .plan-card-mini .icon {
      font-size: 24px;
      margin-bottom: 8px;
    }
    .plan-card-mini .name {
      font-size: 13px;
      font-weight: 600;
      color: var(--navy-800);
      margin-bottom: 4px;
    }
    .plan-card-mini .sub {
      font-size: 11px;
      color: var(--slate-400);
    }

    /* ======= RESOURCES ======= */
    .resources-section { background: var(--white); }
    .resources-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    .resource-card {
      border-radius: var(--radius-lg);
      overflow: hidden;
      background: var(--slate-50);
      transition: all 0.4s var(--ease);
      border: 1px solid var(--slate-100);
    }
    .resource-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 20px 40px -15px rgba(11, 31, 58, 0.12);
    }
    .resource-cover {
      aspect-ratio: 16/9;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 36px;
    }
    .resource-cover.r1 { background: linear-gradient(135deg, #0B1F3A, #244B84); }
    .resource-cover.r2 { background: linear-gradient(135deg, #C68A3D, #E8BD7E); }
    .resource-cover.r3 { background: linear-gradient(135deg, #1F3A5F, #3B82F6); }
    .resource-body { padding: 24px; }
    .resource-category {
      font-family: var(--font-mono);
      font-size: 11px;
      letter-spacing: 0.1em;
      color: var(--copper-500);
      text-transform: uppercase;
      margin-bottom: 10px;
    }
    .resource-title {
      font-family: var(--font-serif);
      font-size: 18px;
      font-weight: 600;
      color: var(--navy-800);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .resource-desc {
      font-size: 14px;
      color: var(--slate-600);
      line-height: 1.65;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }
    .resource-date {
      font-size: 12px;
      color: var(--slate-400);
      margin-top: 16px;
    }

    /* ======= CTA SECTION ======= */
    .cta-section {
      position: relative;
      background: linear-gradient(135deg, var(--navy-900), var(--navy-700));
      color: white;
      overflow: hidden;
    }
    .cta-section::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image:
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
      background-size: 50px 50px;
    }
    .cta-glow {
      position: absolute;
      width: 500px;
      height: 500px;
      border-radius: 50%;
      filter: blur(100px);
      background: var(--copper-500);
      opacity: 0.15;
      top: -200px;
      right: -100px;
    }
    .cta-inner {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 80px;
      align-items: center;
    }
    .cta-content h2 {
      font-family: var(--font-serif);
      font-size: 42px;
      font-weight: 600;
      line-height: 1.25;
      margin-bottom: 20px;
    }
    .cta-content p {
      font-size: 16px;
      color: rgba(255,255,255,0.7);
      line-height: 1.75;
      margin-bottom: 28px;
    }
    .cta-contact-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .cta-contact-item {
      display: flex;
      align-items: center;
      gap: 14px;
      font-size: 15px;
      color: rgba(255,255,255,0.8);
    }
    .cta-contact-icon {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: rgba(198, 138, 61, 0.15);
      border: 1px solid rgba(198, 138, 61, 0.3);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--copper-400);
      flex-shrink: 0;
    }

    .cta-form {
      background: rgba(255,255,255,0.04);
      border: 1px solid rgba(255,255,255,0.1);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-radius: var(--radius-lg);
      padding: 40px;
    }
    .cta-form h3 {
      font-family: var(--font-serif);
      font-size: 24px;
      font-weight: 600;
      margin-bottom: 8px;
    }
    .cta-form .form-subtitle {
      font-size: 14px;
      color: rgba(255,255,255,0.55);
      margin-bottom: 28px;
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-group label {
      display: block;
      font-size: 13px;
      color: rgba(255,255,255,0.7);
      margin-bottom: 8px;
      font-weight: 500;
    }
    .form-group input,
    .form-group select,
    .form-group textarea {
      width: 100%;
      height: 48px;
      padding: 0 16px;
      background: rgba(255,255,255,0.06);
      border: 1px solid rgba(255,255,255,0.12);
      border-radius: var(--radius-sm);
      color: white;
      font-size: 14px;
      font-family: var(--font-sans);
      transition: all 0.25s;
    }
    .form-group textarea {
      height: 96px;
      padding: 12px 16px;
      resize: vertical;
    }
    .form-group input::placeholder,
    .form-group textarea::placeholder {
      color: rgba(255,255,255,0.35);
    }
    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      outline: none;
      border-color: var(--copper-500);
      background: rgba(255,255,255,0.08);
    }
    .form-group select {
      cursor: pointer;
      appearance: none;
      -webkit-appearance: none;
      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='rgba(255,255,255,0.5)' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
      background-repeat: no-repeat;
      background-position: right 16px center;
    }
    .form-group select option {
      background: var(--navy-800);
      color: white;
    }
    .form-submit {
      width: 100%;
      height: 52px;
      margin-top: 8px;
      font-size: 15px;
      font-weight: 500;
    }
    .form-submit:disabled {
      opacity: 0.8;
      cursor: not-allowed;
    }
    .form-required {
      color: var(--copper-400);
      font-weight: 400;
    }
    .form-error {
      font-size: 12px;
      color: #ff6b6b;
      margin-top: 6px;
      line-height: 1.4;
    }
    .form-group input.has-error,
    .form-group select.has-error,
    .form-group textarea.has-error {
      border-color: #ff6b6b !important;
      background: rgba(255, 107, 107, 0.08) !important;
    }

    /* Form link card */
    .form-link-card {
      background: linear-gradient(145deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02));
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: 20px;
      padding: 36px 32px;
      display: flex;
      flex-direction: column;
      gap: 20px;
      backdrop-filter: blur(12px);
      position: relative;
      overflow: hidden;
    }
    .form-link-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 2px;
      background: linear-gradient(90deg, transparent, var(--copper-400), transparent);
      opacity: 0.6;
    }
    .form-link-btn {
      width: 100%;
      justify-content: center;
      padding: 16px 28px;
      font-size: 16px;
      font-weight: 600;
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 10px;
    }
    .form-link-btn svg {
      width: 18px;
      height: 18px;
      transition: transform 0.2s ease;
    }
    .form-link-btn:hover svg {
      transform: translateX(4px);
    }
    .form-link-plain {
      border-top: 1px solid rgba(255,255,255,0.08);
      padding-top: 18px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .form-link-url {
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      font-size: 13px;
      line-height: 1.5;
      color: rgba(255,255,255,0.7);
      background: rgba(255,255,255,0.04);
      padding: 10px 12px;
      border-radius: 8px;
      word-break: break-all;
      user-select: all;
      border: 1px solid rgba(255,255,255,0.06);
    }
    .form-link-hint {
      margin: 0;
      font-size: 12px;
      color: rgba(255,255,255,0.4);
      line-height: 1.5;
      text-align: center;
    }

    /* ======= FOOTER ======= */
    .footer {
      background: var(--navy-900);
      color: rgba(255,255,255,0.6);
      padding: 80px 0 32px;
      border-top: 1px solid rgba(255,255,255,0.06);
    }
    .footer-main {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 60px;
      margin-bottom: 60px;
    }
    .footer-brand .logo { margin-bottom: 16px; }
    .footer-brand .logo-img { height: 32px; }
    .footer-brand p {
      font-size: 14px;
      line-height: 1.7;
      color: rgba(255,255,255,0.5);
      max-width: 280px;
    }
    .footer-col h4 {
      font-size: 14px;
      font-weight: 600;
      color: white;
      margin-bottom: 20px;
    }
    .footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 12px; }
    .footer-col a {
      font-size: 14px;
      color: rgba(255,255,255,0.5);
      transition: color 0.2s;
    }
    .footer-col a:hover { color: var(--copper-400); }
    .footer-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-top: 28px;
      border-top: 1px solid rgba(255,255,255,0.06);
      font-size: 13px;
      color: rgba(255,255,255,0.4);
    }
    .footer-icp { display: flex; gap: 24px; }

    /* ======= ANIMATIONS ======= */
    @keyframes fadeUp {
      from { opacity: 0; transform: translateY(24px); }
      to { opacity: 1; transform: translateY(0); }
    }
    @keyframes float {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-12px); }
    }
    @keyframes float2 {
      0%, 100% { transform: translateY(0) translateX(0); }
      50% { transform: translateY(-8px) translateX(6px); }
    }
    .animate-float { animation: float 6s ease-in-out infinite; }
    .animate-float-2 { animation: float2 8s ease-in-out infinite; animation-delay: -2s; }

    /* ======= SCROLL-REVEAL ======= */
    .reveal {
      opacity: 0;
      transform: translateY(30px);
      transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
    }
    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }

    /* ======= RESPONSIVE ======= */
    @media (max-width: 1024px) {
      .hero-inner { grid-template-columns: 1fr; gap: 60px; }
      .hero-visual { margin: 0 auto; max-width: 420px; }
      .hero-title { font-size: 44px; }
      .features-grid { grid-template-columns: repeat(2, 1fr); }
      .courses-grid { grid-template-columns: repeat(2, 1fr); }
      .resources-grid { grid-template-columns: repeat(2, 1fr); }
      .trust-grid { grid-template-columns: 1fr; }
      .enterprise-grid { grid-template-columns: 1fr; gap: 56px; }
      .enterprise-visual { max-width: 400px; margin: 0 auto; }
      .cta-inner { grid-template-columns: 1fr; gap: 48px; }
      .footer-main { grid-template-columns: 1fr 1fr; gap: 40px; }
      .stats-row { grid-template-columns: repeat(2, 1fr); gap: 24px; }
      .stats-row-6 { grid-template-columns: repeat(3, 1fr); gap: 0; }
      .stat-item { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.08); padding: 24px 16px; }
      .stats-row-6 .stat-item:nth-child(1), .stats-row-6 .stat-item:nth-child(2), .stats-row-6 .stat-item:nth-child(3) { border-bottom: 1px solid rgba(255,255,255,0.08); }
      .stats-row-6 .stat-item:nth-child(3n+1), .stats-row-6 .stat-item:nth-child(3n+2) { border-right: 1px solid rgba(255,255,255,0.08); }
      .founder-card-full { grid-template-columns: 1fr; gap: 32px; padding: 36px; }
      .founder-photo-lg { width: 240px; height: 300px; margin: 0 auto; }
      .founder-name-row { flex-direction: column; align-items: flex-start; gap: 8px; }
      .founder-credentials { grid-template-columns: 1fr; }
      .stat-item:nth-child(1), .stat-item:nth-child(2) { border-bottom: 1px solid rgba(255,255,255,0.08); }
      .stat-item:nth-child(3), .stat-item:nth-child(4) { border-bottom: none; }
    }

    @media (max-width: 768px) {
      .container { padding: 0 20px; }
      section { padding: 72px 0; }
      .section-title { font-size: 28px; letter-spacing: -0.01em; }
      .section-subtitle { font-size: 15px; line-height: 1.7; }
      .section-header { margin-bottom: 40px; gap: 12px; }
      .eyebrow { font-size: 11px; }

      /* Navigation */
      .nav { padding: 14px 0; }
      .nav-links, .nav-cta .btn { display: none; }
      .nav-hamburger { display: flex; width: 44px; height: 44px; }
      .logo { font-size: 18px; }
      .logo-img { height: 30px !important; }
      .logo-mark { width: 32px; height: 32px; }

      /* Hero */
      .hero { min-height: auto; padding: 96px 0 56px; }
      .hero-title { font-size: 32px; margin: 16px 0 20px; }
      .hero-subtitle { font-size: 15px; margin-bottom: 28px; }
      .hero-ctas { flex-direction: column; }
      .hero-ctas .btn { width: 100%; height: 50px; }
      .hero-inner { gap: 48px; }
      .hero-visual { max-width: 340px; }
      .hero-meta { gap: 20px; flex-wrap: wrap; margin-top: 40px; padding-top: 20px; }
      .hero-meta-item .num { font-size: 24px; }
      .hero-meta-item .label { font-size: 12px; }

      /* Hero floating cards - hide to avoid overflow on small screens */
      .hv-floating-1 { width: 160px; padding: 14px; left: -5px; bottom: 10%; }
      .hv-floating-2 { width: 140px; padding: 14px; left: -10px; top: 15%; }
      .hv-main { padding: 24px; }
      .hv-main-title { font-size: 22px; }
      .hv-main-stats { gap: 12px; }
      .hv-main-stat { padding: 12px; }
      .hv-main-stat .val { font-size: 20px; }

      /* Features / courses / resources cards */
      .features-grid { grid-template-columns: 1fr; gap: 16px; }
      .feature-card { padding: 28px 24px; }
      .feature-icon { width: 40px; height: 40px; margin-bottom: 18px; }
      .feature-title { font-size: 18px; margin-bottom: 8px; }
      .feature-desc { font-size: 14px; }

      .courses-grid { grid-template-columns: 1fr; gap: 20px; }
      .course-body { padding: 22px 20px; }
      .course-title { font-size: 18px; }
      .course-desc { font-size: 14px; margin-bottom: 16px; }
      .course-meta-left { gap: 12px; font-size: 12px; }
      .course-price { font-size: 18px; }

      .resources-grid { grid-template-columns: 1fr; gap: 20px; }
      .resource-body { padding: 20px; }
      .resource-title { font-size: 17px; }

      /* Courses header */
      .courses-header-row { flex-direction: column; align-items: flex-start; gap: 20px; }
      .courses-header-row .btn { width: 100%; height: 48px; }
      .version-switch { align-self: stretch; }
      .version-switch-btn { flex: 1; text-align: center; font-size: 13px; padding: 10px 12px; }

      /* Trust section */
      .founder-card-full { padding: 28px 24px; gap: 24px; }
      .founder-photo-lg { width: 180px; height: 230px; }
      .founder-card-full .founder-name { font-size: 24px; }
      .founder-credentials { gap: 10px; }

      .testimonial-cards { grid-template-columns: 1fr; gap: 16px; }
      .testimonial-card { padding: 22px; }
      .testimonial-text { font-size: 14px; line-height: 1.7; }

      /* Stats */
      .stats-row { grid-template-columns: repeat(2, 1fr); gap: 0; margin-bottom: 56px; }
      .stat-item { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.08); padding: 20px 12px; }
      .stat-item:nth-child(odd) { border-right: 1px solid rgba(255,255,255,0.08); }
      .stat-item:nth-child(1), .stat-item:nth-child(2) { border-bottom: 1px solid rgba(255,255,255,0.08); }
      .stat-item:nth-child(3), .stat-item:nth-child(4) { border-bottom: none; }
      .stat-num { font-size: 36px; }
      .stat-label { font-size: 12px; margin-top: 6px; }

      /* Logo wall */
      .logo-wall { margin-top: 56px; }
      .logo-row { gap: 20px; }
      .logo-item { font-size: 16px; padding: 8px 16px; }

      /* Enterprise */
      .enterprise-grid { grid-template-columns: 1fr; gap: 40px; }
      .enterprise-visual { max-width: 100%; aspect-ratio: auto; }
      .enterprise-visual-main { padding: 28px; position: relative; }
      .enterprise-visual-main::before { display: none; }
      .ev-step { margin-bottom: 24px; }
      .ev-step-num { width: 36px; height: 36px; font-size: 12px; flex-shrink: 0; }
      .ev-step-content .title { font-size: 16px; }
      .ev-step-content .desc { font-size: 13px; }
      .ev-connector { left: 42px; }
      .enterprise-plans { grid-template-columns: 1fr; gap: 12px; }
      .plan-card-mini { padding: 14px; }

      /* CTA / contact form */
      .cta-inner { grid-template-columns: 1fr; gap: 36px; }
      .cta-content h2 { font-size: 28px; margin-bottom: 16px; }
      .cta-content p { font-size: 15px; margin-bottom: 24px; }
      .cta-contact-list { gap: 14px; }
      .cta-contact-item { font-size: 14px; }
      .cta-contact-icon { width: 40px; height: 40px; }

      .cta-form { padding: 28px 22px; }
      .cta-form h3 { font-size: 20px; }
      .cta-form .form-subtitle { font-size: 13px; margin-bottom: 24px; }
      .form-group { margin-bottom: 16px; }
      .form-group input,
      .form-group select,
      .form-group textarea { height: 48px; font-size: 15px; }
      .form-group textarea { height: 90px; padding: 12px 14px; font-size: 15px; }
      .form-submit { height: 50px; font-size: 15px; }

      /* Footer */
      .footer { padding: 56px 0 24px; }
      .footer-main { grid-template-columns: 1fr; gap: 32px; margin-bottom: 40px; }
      .footer-brand p { max-width: 100%; font-size: 14px; }
      .footer-col h4 { font-size: 15px; margin-bottom: 16px; }
      .footer-col ul { gap: 10px; }
      .footer-col a {
        display: inline-block;
        padding: 6px 0;
        font-size: 14px;
        min-height: 36px;
      }
      .footer-bottom { flex-direction: column; gap: 12px; text-align: center; padding-top: 24px; }
      .footer-icp { flex-direction: column; gap: 8px; font-size: 12px; }

      /* Ensure all buttons have min 44px touch area */
      .btn { min-height: 48px; min-width: 48px; font-size: 15px; }
    }

    @media (max-width: 480px) {
      .container { padding: 0 16px; }
      .hero-title { font-size: 28px; line-height: 1.25; }
      .section-title { font-size: 24px; }
      .hero-subtitle { font-size: 14px; }
      .hero-meta { gap: 16px; }
      .hero-meta-item .num { font-size: 22px; }
      .stat-num { font-size: 30px; }
      .stat-label { font-size: 11px; }
      .cta-content h2 { font-size: 24px; }
      .logo-item { font-size: 14px; padding: 6px 12px; }
      .hv-main { padding: 20px; }
      .hv-main-title { font-size: 18px; }
    }

    /* Focus styles */
    :focus-visible {
      outline: 2px solid var(--copper-500);
      outline-offset: 2px;
    }

    /* 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;
      }
    }
  
/* ======== 迁移补充样式（静态包新增）======== */
/* 表单内嵌 iframe（自有域名下飞书分享表单可正常内嵌） */
.form-embed { margin-top: 12px; }
.form-embed iframe {
  width: 100%; min-height: 620px; border: 1px solid rgba(255,255,255,.14);
  border-radius: 12px; background: rgba(255,255,255,.03); display: block;
}
.form-embed-fallback { text-align: center; font-size: 13px; margin-top: 10px; opacity: .55; }
.form-embed-fallback a { color: var(--copper-400); }
/* 备案号行（备案下发后启用） */
.footer-icp a { color: inherit; text-decoration: none; }
.footer-icp a:hover { color: rgba(255,255,255,.6); }

/* ======== 品牌墙（v3.1 新增 · v3.2 升级：logo 上墙 + 工商全称）======== */
.clients-wall { margin-top: 44px; text-align: center; }
.clients-wall-title { font-family: var(--font-serif, "Noto Serif SC", serif); font-size: 20px; font-weight: 600; color: var(--white); margin-bottom: 6px; }
.clients-wall-sub { font-size: 13px; color: rgba(255,255,255,.55); margin-bottom: 22px; }
.clients-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
.client-card { background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.14); border-radius: 10px; padding: 18px 8px 16px; transition: border-color .25s ease, transform .25s ease, background .25s ease; }
.client-card:hover { border-color: var(--copper-400); background: rgba(255,255,255,.08); transform: translateY(-2px); }
.client-name { font-size: 13px; font-weight: 600; color: var(--white); letter-spacing: .01em; line-height: 1.45; white-space: normal; word-break: keep-all; overflow-wrap: anywhere; }
/* v3.2 logo 芯片：统一白色浅底，兼容深色/白底 logo，视觉规格统一 */
.client-logo { height: 46px; margin-bottom: 10px; display: flex; align-items: center; justify-content: center; }
.client-logo .logo-chip { background: rgba(255,255,255,.94); border-radius: 8px; height: 46px; padding: 0 12px; display: flex; align-items: center; justify-content: center; max-width: 100%; }
.client-logo .logo-chip img { max-height: 30px; max-width: 150px; width: auto; height: auto; object-fit: contain; display: block; }
/* v3.2 文字名牌（logo 未获取的两家）：占位等高的铜金文字标，非伪造 logo */
.client-mark { height: 46px; margin-bottom: 10px; display: flex; align-items: center; justify-content: center; }
.client-mark span { font-family: var(--font-serif, "Noto Serif SC", serif); font-size: 17px; font-weight: 600; color: var(--copper-400); letter-spacing: .14em; white-space: nowrap; }
/* v3.2 简称辅名 */
.client-short { margin-top: 3px; font-size: 11px; line-height: 1.4; color: rgba(255,255,255,.52); letter-spacing: .02em; }
.client-tag { display: inline-block; margin-top: 8px; font-size: 11px; line-height: 1.5; color: rgba(255,255,255,.6); border: 1px solid rgba(255,255,255,.18); border-radius: 999px; padding: 2px 10px; white-space: nowrap; }

/* ======== 白皮书资源卡 + 留资弹窗（v3.1 新增）======== */
.resource-card.wp { cursor: pointer; }
.resource-card.wp .resource-cover.wp-cover { background: linear-gradient(135deg, var(--navy-800) 0%, #1a3a5c 100%); display: flex; align-items: center; justify-content: center; }
.resource-card.wp .wp-badge { position: absolute; top: 12px; left: 12px; background: var(--copper-400); color: var(--white); font-size: 11px; font-weight: 600; padding: 3px 10px; border-radius: 999px; letter-spacing: .05em; }
.wp-modal { position: fixed; inset: 0; z-index: 999; display: none; align-items: center; justify-content: center; background: rgba(4,10,20,.74); backdrop-filter: blur(4px); padding: 20px; }
.wp-modal.open { display: flex; }
.wp-modal-box { width: min(520px, 94vw); max-height: 90vh; overflow: auto; background: var(--white); border-radius: 16px; padding: 28px; position: relative; box-shadow: 0 24px 80px rgba(4,10,20,.4); }
.wp-modal-close { position: absolute; top: 14px; right: 14px; width: 34px; height: 34px; border-radius: 50%; background: rgba(7,21,42,.06); display: flex; align-items: center; justify-content: center; color: var(--navy-800); transition: background .2s ease; }
.wp-modal-close:hover { background: rgba(7,21,42,.12); }
.wp-modal-title { font-family: var(--font-serif, "Noto Serif SC", serif); font-size: 22px; color: var(--navy-800); font-weight: 700; margin: 0 0 8px; }
.wp-modal-sub { font-size: 13.5px; color: #5b6b7d; line-height: 1.7; margin: 0 0 16px; }
.wp-modal-embed { border: 1px solid #e3e8ee; border-radius: 10px; overflow: hidden; background: #f7f9fb; }
.wp-modal-embed iframe { width: 100%; height: 460px; border: 0; display: block; }
.wp-modal-fallback { margin-top: 10px; font-size: 12.5px; color: #8a97a5; text-align: center; }
.wp-modal-fallback a { color: var(--copper-400); }
.wp-modal-dl { margin-top: 14px; text-align: center; font-size: 13px; color: #5b6b7d; }
.wp-modal-dl a { color: var(--copper-400); font-weight: 600; text-decoration: none; border-bottom: 1px dashed var(--copper-400); }
.wp-modal-alt { margin-top: 12px; padding: 14px 16px; border: 1px solid #e3e8ee; border-radius: 10px; background: #f7f9fb; display: flex; align-items: center; justify-content: center; gap: 16px; flex-wrap: wrap; }
.wp-modal-alt .alt-btn { display: inline-block; background: var(--copper-400); color: var(--white); font-size: 13.5px; font-weight: 600; padding: 9px 22px; border-radius: 8px; text-decoration: none; }
.wp-modal-alt .alt-btn:hover { opacity: .9; }
.wp-modal-alt .alt-phone { font-size: 12.5px; color: #5b6b7d; }
@media (max-width: 480px) { .wp-modal-alt { flex-direction: column; gap: 10px; } }
@media (max-width: 900px) { .clients-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 640px) { .clients-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; } .client-name { font-size: 12px; } .client-logo, .client-mark { height: 40px; margin-bottom: 8px; } .client-logo .logo-chip { height: 40px; padding: 0 9px; } .client-logo .logo-chip img { max-height: 26px; max-width: 120px; } .client-mark span { font-size: 15px; letter-spacing: .1em; } .client-card { padding: 14px 6px 12px; } .wp-modal-embed iframe { height: 560px; } }

/* ======== 双版本切换（静态包新增）======== */
body.v-small [data-v="enterprise"] { display: none !important; }
body.v-enterprise [data-v="small"] { display: none !important; }


/* ======== v3 多页化新增 ======== */
/* 桌面导航：课程体系 mega 下拉 */
.nav-dropdown { position: relative; }
.nav-mega {
  position: absolute; top: calc(100% + 14px); left: 50%;
  transform: translateX(-50%) translateY(8px);
  display: flex; gap: 0; min-width: 660px;
  background: var(--white); border-radius: 14px;
  box-shadow: 0 24px 64px rgba(7, 21, 42, 0.18);
  border: 1px solid var(--slate-100);
  padding: 22px 10px;
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity .22s var(--ease), transform .22s var(--ease), visibility .22s;
  z-index: 90;
}
.nav-dropdown:hover .nav-mega,
.nav-dropdown:focus-within .nav-mega {
  opacity: 1; visibility: visible; pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.nav-mega-group { flex: 1; padding: 0 18px; }
.nav-mega-group + .nav-mega-group { border-left: 1px solid var(--slate-100); }
.nav-mega-group-title {
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--copper-500); margin-bottom: 10px; padding-left: 12px;
}
.nav-mega-item { display: block; padding: 10px 12px; border-radius: 10px; }
.nav-mega-item:hover { background: var(--slate-50); }
.nav-mega-item .t { display: block; font-size: 14px; font-weight: 600; color: var(--navy-800); }
.nav-mega-item .d { display: block; font-size: 12.5px; color: var(--slate-600); margin-top: 3px; line-height: 1.5; }
.nav-cta-btn { padding: 9px 18px !important; font-size: 14px !important; }
@media (max-width: 1024px) {
  .nav-mega { position: static; transform: none; display: flex; flex-direction: column; min-width: 0; opacity: 1; visibility: visible; pointer-events: auto; box-shadow: none; border: none; padding: 0; }
}
/* 移动端菜单分组 */
.mobile-menu .mm-group { margin-bottom: 20px; }
.mobile-menu .mm-group-title {
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--copper-400); padding: 0 0 4px 0; border-bottom: none; min-height: 0;
}
.mobile-menu .mm-group a { font-size: 16px; padding: 12px 0; }
/* ======== 课程详情页 ======== */
.detail-breadcrumb {
  background: var(--slate-50); border-bottom: 1px solid var(--slate-100);
  padding: 14px 0; font-size: 13px; color: var(--slate-600);
}
.detail-breadcrumb a { color: var(--slate-600); transition: color .2s; }
.detail-breadcrumb a:hover { color: var(--copper-500); }
.detail-breadcrumb .sep { margin: 0 8px; color: var(--slate-400); }
.detail-breadcrumb .cur { color: var(--navy-800); font-weight: 500; }
.detail-hero { position: relative; background: var(--navy-900); color: var(--white); overflow: hidden; padding: 88px 0 72px; }
.detail-hero-bg { position: absolute; inset: 0; }
.detail-hero-bg img { width: 100%; height: 100%; object-fit: cover; opacity: .32; }
.detail-hero-bg .tint { position: absolute; inset: 0; }
.tint-1 { background: linear-gradient(115deg, rgba(7,21,42,.96) 30%, rgba(27,58,107,.72) 70%, rgba(198,138,61,.30)); }
.tint-2 { background: linear-gradient(115deg, rgba(7,21,42,.97) 38%, rgba(11,31,58,.80) 68%, rgba(59,130,246,.22)); }
.tint-3 { background: linear-gradient(115deg, rgba(7,21,42,.96) 26%, rgba(36,75,132,.75) 64%, rgba(217,162,90,.34)); }
.detail-hero-inner { position: relative; z-index: 2; max-width: 820px; }
.version-chip {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 12px; font-weight: 600; letter-spacing: .06em;
  padding: 5px 14px; border-radius: 999px; margin-bottom: 18px;
}
.v-chip-enterprise { background: rgba(27,58,107,.85); color: var(--white); border: 1px solid rgba(217,162,90,.5); }
.v-chip-small { background: var(--copper-500); color: var(--white); }
.version-chip .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--copper-300); }
.detail-hero h1 {
  font-family: var(--font-serif); font-size: 44px; font-weight: 600;
  line-height: 1.25; letter-spacing: -0.01em; margin: 0 0 18px;
}
.detail-hero .lead { font-size: 17px; color: rgba(255,255,255,.78); line-height: 1.8; max-width: 720px; margin-bottom: 30px; }
.detail-hero .hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; }
.detail-section { padding: 64px 0; }
.detail-section.alt { background: var(--slate-50); }
.detail-section .section-header { margin-bottom: 36px; }
.points-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.point-card {
  display: flex; align-items: center; gap: 14px;
  border: 1px solid var(--slate-100); border-radius: 12px;
  background: var(--white); padding: 20px 22px;
  font-size: 15px; font-weight: 500; color: var(--navy-800);
}
.point-card .ic {
  width: 40px; height: 40px; border-radius: 50%; flex-shrink: 0;
  background: rgba(198,138,61,.12); border: 1px solid rgba(198,138,61,.35);
  display: flex; align-items: center; justify-content: center; color: var(--copper-500);
}
.chips-wrap { display: flex; flex-wrap: wrap; gap: 10px; }
.detail-target {
  background: var(--slate-50); border-left: 3px solid var(--copper-500);
  border-radius: 0 12px 12px 0; padding: 18px 22px;
  font-size: 15px; color: var(--slate-600); line-height: 1.7;
}
.detail-target strong { color: var(--navy-800); }
.detail-claim {
  font-family: var(--font-serif); font-size: 26px; font-weight: 600;
  color: var(--navy-800); line-height: 1.5; margin-bottom: 14px;
}
.detail-claim .accent { color: var(--copper-500); }
.detail-steps { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px 32px; }
.detail-steps .ev-step { margin-bottom: 0; }
.detail-steps .ev-step-num { background: rgba(198,138,61,.1); color: var(--copper-500); }
.detail-steps .ev-step-content .title { color: var(--navy-800); }
.detail-steps .ev-step-content .desc { color: var(--slate-600); }
.stats-band { background: var(--navy-900); padding: 24px 0; }
.stats-band .stats-row-6 { margin-bottom: 0; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.ver-entry-card {
  border: 1px solid var(--slate-100); border-radius: var(--radius-lg);
  background: var(--white); padding: 26px 24px;
  display: flex; flex-direction: column; gap: 8px;
}
.ver-entry-card .vt { font-family: var(--font-mono); font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--copper-500); }
.ver-entry-card .vl { font-size: 16px; font-weight: 600; color: var(--navy-800); line-height: 1.4; }
.ver-entry-card .vd { font-size: 13px; color: var(--slate-600); line-height: 1.6; flex: 1; }
@media (max-width: 768px) {
  .detail-hero { padding: 56px 0 48px; }
  .detail-hero h1 { font-size: 30px; }
  .points-grid { grid-template-columns: 1fr; }
  .detail-steps { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; }
}