/* ============================================================
   aidsf.com — Optimized Stylesheet (2026-02-10)
   ============================================================ */

/* === Design Tokens === */
:root {
    /* Primary palette — richer range */
    --primary: #0052CC;
    --primary-hover: #003d99;
    --primary-light: rgba(0, 82, 204, 0.08);
    --accent: #F59E0B;
    /* warm accent for emphasis */
    --accent-light: #FEF3C7;
    --gradient-hero: linear-gradient(135deg, #0052CC 0%, #2563EB 50%, #3B82F6 100%);
    --gradient-cta: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);

    /* Backgrounds */
    --bg-light-blue: #F0F5FF;
    --bg-white: #ffffff;
    --bg-gray: #f5f5f7;
    --bg-warm: #FFFBF0;
    /* warm section variant */

    /* Text */
    --title-dark-blue: #061178;
    --text-primary: #1d1d1f;
    --text-secondary: #5a5a5a;

    /* Footer */
    --footer-dark: #1a1a2e;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.12);

    /* Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
}

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

html {
    scroll-behavior: smooth;
}

section[id] {
    scroll-margin-top: 90px;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Inter', -apple-system, sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    background: var(--bg-white);
}

/* === Header === */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

.logo span {
    color: var(--title-dark-blue);
}

.nav-menu {
    display: flex;
    gap: 32px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-link:hover {
    color: var(--primary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* === Buttons === */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--primary);
    color: white;
    padding: 10px 24px;
    border-radius: 24px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 82, 204, 0.3);
}

.btn-default {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: var(--primary);
    padding: 10px 24px;
    border-radius: 24px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    border: 2px solid var(--primary);
    transition: all 0.3s;
    cursor: pointer;
}

.btn-default:hover {
    background: var(--bg-light-blue);
}

.btn-small {
    padding: 8px 18px;
    border-radius: 20px;
    font-size: 13px;
}

/* === Language Switcher === */
.lang-switcher {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border: 1px solid rgba(0, 82, 204, 0.3);
    border-radius: 20px;
    background: transparent;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 13px;
    color: var(--text-secondary);
}

.lang-switcher:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.lang-switcher svg {
    width: 16px;
    height: 16px;
}

/* === Mobile Menu Button === */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s;
}

/* === Mobile Menu === */
.mobile-menu {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    display: none;
    align-items: flex-start;
    justify-content: center;
    padding: 84px 16px 24px;
    z-index: 1100;
}

.mobile-menu.is-open {
    display: flex;
}

.mobile-menu-panel {
    width: min(520px, 100%);
    background: var(--bg-white);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.06);
}

.mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 18px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.mobile-menu-title {
    font-weight: 700;
    color: var(--title-dark-blue);
}

.mobile-menu-close {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    border: none;
    background: rgba(0, 0, 0, 0.06);
    cursor: pointer;
    font-size: 20px;
    line-height: 1;
}

.mobile-menu-nav {
    display: flex;
    flex-direction: column;
    gap: 14px;
    padding: 18px;
}

.mobile-menu-nav .nav-link {
    font-size: 16px;
    color: var(--text-primary);
}

.mobile-menu-actions {
    padding: 0 18px 18px;
    display: flex;
    gap: 12px;
}

/* === Contact Modal === */
body.modal-open {
    overflow: hidden;
}

.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    display: none;
    align-items: center;
    justify-content: center;
    padding: 24px;
    z-index: 1200;
}

.modal-backdrop.is-open {
    display: flex;
}

.modal {
    width: min(680px, 100%);
    background: var(--bg-white);
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(0, 0, 0, 0.08);
    padding: 32px 28px;
    position: relative;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-close {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 42px;
    height: 42px;
    border-radius: 14px;
    border: none;
    background: rgba(0, 0, 0, 0.06);
    cursor: pointer;
    font-size: 22px;
    line-height: 1;
    transition: background 0.2s;
}

.modal-close:hover {
    background: rgba(0, 0, 0, 0.12);
}

.modal h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--title-dark-blue);
    margin-bottom: 8px;
    padding-right: 48px;
}

.modal-subtitle {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.modal-context {
    margin-top: 0;
    margin-bottom: 20px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-light-blue);
    color: var(--primary);
    font-weight: 700;
    border-radius: 999px;
    padding: 8px 14px;
    font-size: 13px;
}

/* Simplified contact: tabs */
.contact-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 24px;
    border-bottom: 2px solid var(--bg-gray);
}

.contact-tab {
    flex: 1;
    padding: 12px;
    text-align: center;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    border: none;
    background: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.3s;
}

.contact-tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.contact-tab:hover {
    color: var(--primary);
}

.contact-panel {
    display: none;
}

.contact-panel.active {
    display: block;
}

.contact-qr {
    background: var(--bg-gray);
    border-radius: 16px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.contact-qr img {
    width: 200px;
    height: 200px;
    border-radius: 12px;
    object-fit: cover;
}

.contact-hint {
    font-size: 14px;
    color: var(--text-secondary);
    text-align: center;
    margin-top: 8px;
}

.contact-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.contact-download {
    display: inline-flex;
    margin-top: 12px;
    color: var(--primary);
    text-decoration: none;
    font-weight: 700;
}

.contact-download:hover {
    text-decoration: underline;
}

.lead-form {
    display: grid;
    gap: 10px;
}

.lead-form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.lead-form input,
.lead-form select,
.lead-form textarea {
    width: 100%;
    border: 1px solid rgba(0, 0, 0, 0.12);
    border-radius: 10px;
    padding: 10px 12px;
    font-size: 14px;
    color: var(--text-primary);
    background: #fff;
    outline: none;
    transition: all 0.2s;
}

.lead-form textarea {
    min-height: 84px;
    resize: vertical;
}

.lead-form input:focus,
.lead-form select:focus,
.lead-form textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 82, 204, 0.1);
}

.lead-form .btn-primary {
    justify-content: center;
    width: 100%;
}

.lead-form-note {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 2px;
}

/* === Toast === */
.toast {
    position: fixed;
    left: 50%;
    bottom: 110px;
    transform: translateX(-50%) translateY(0);
    background: rgba(0, 0, 0, 0.85);
    color: white;
    padding: 10px 14px;
    border-radius: 999px;
    font-size: 14px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
    z-index: 1300;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(-4px);
}

/* === Floating CTA (mobile) === */
.floating-cta {
    position: fixed;
    left: 16px;
    right: 16px;
    bottom: calc(16px + env(safe-area-inset-bottom, 0px));
    display: none;
    gap: 12px;
    z-index: 1050;
}

.floating-btn {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 16px;
    border-radius: 999px;
    font-weight: 800;
    text-decoration: none;
    border: 2px solid var(--primary);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--primary);
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    transition: all 0.3s;
}

.floating-btn.primary {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.floating-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Auto-hide floating CTA on scroll up */
.floating-cta.hide-on-scroll {
    transform: translateY(120px);
    transition: transform 0.3s ease;
}

.floating-cta.show-on-scroll {
    transform: translateY(0);
    transition: transform 0.3s ease;
}


/* ============================================================
   Hero Section
   ============================================================ */
.hero {
    padding: 120px 24px 80px;
    background: var(--bg-white);
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-video-wrapper {
    position: relative;
}

.hero-video {
    width: 100%;
    aspect-ratio: 16/9;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    background: #000;
}

.hero-video video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 25%;
}

.hero-badge {
    position: absolute;
    bottom: -20px;
    left: 20px;
    background: var(--primary);
    color: white;
    padding: 10px 20px;
    border-radius: 24px;
    font-size: 14px;
    font-weight: 600;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 8px;
}

.hero-content {
    padding-left: 20px;
}

.hero-title {
    font-size: 38px;
    font-weight: 700;
    color: var(--title-dark-blue);
    line-height: 1.2;
    letter-spacing: -0.01em;
    margin-bottom: 16px;
}

.hero-title .accent {
    background: linear-gradient(135deg, var(--primary), #3B82F6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 22px;
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 12px;
}

.hero-description {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 36px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}


/* ============================================================
   Stats Counter Section
   ============================================================ */
.stats-bar {
    padding: 48px 24px;
    background: linear-gradient(135deg, #0052CC 0%, #2563EB 100%);
    color: white;
}

.stats-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 42px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 6px;
    font-variant-numeric: tabular-nums;
}

.stat-number .suffix {
    font-size: 24px;
    font-weight: 600;
    opacity: 0.9;
}

.stat-label {
    font-size: 14px;
    opacity: 0.85;
    font-weight: 500;
}


/* ============================================================
   Audience Split
   ============================================================ */
.audience-split {
    padding: 24px 24px 0;
    background: var(--bg-white);
}

.audience-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
}

.audience-card {
    border: 1px solid rgba(0, 82, 204, 0.14);
    border-radius: 14px;
    padding: 18px;
    background: linear-gradient(180deg, #f6f9ff 0%, #ffffff 100%);
    text-decoration: none;
    color: inherit;
    transition: all 0.25s ease;
}

.audience-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-sm);
    border-color: rgba(0, 82, 204, 0.28);
}

.audience-card-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: var(--bg-light-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
    transition: background 0.3s, transform 0.3s;
}

.audience-card:hover .audience-card-icon {
    background: var(--primary);
    transform: scale(1.08);
}

.audience-card:hover .audience-card-icon svg {
    stroke: white;
}

.audience-card-title {
    font-size: 15px;
    font-weight: 800;
    color: var(--title-dark-blue);
    margin-bottom: 8px;
}

.audience-card-desc {
    font-size: 13px;
    line-height: 1.6;
    color: var(--text-secondary);
}


/* ============================================================
   Section Commons
   ============================================================ */
.section-container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-eyebrow {
    font-size: 12px;
    font-weight: 700;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 16px;
    text-align: center;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    text-align: center;
    color: var(--title-dark-blue);
    margin-bottom: 24px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    text-align: center;
    max-width: 640px;
    margin: 0 auto 60px;
}


/* ============================================================
   Credentials
   ============================================================ */
.credentials {
    padding: 72px 24px;
    background: var(--bg-white);
}

.credential-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.credential-card {
    background: transparent;
    padding: 0;
    text-align: center;
}

.credential-icon {
    width: 64px;
    height: 64px;
    background: var(--bg-light-blue);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--primary);
    transition: all 0.3s;
}

.credential-card:hover .credential-icon {
    background: var(--primary);
    color: white;
    transform: scale(1.1);
}

.credential-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--title-dark-blue);
}

.credential-desc {
    font-size: 14px;
    color: var(--text-secondary);
}


/* ============================================================
   Featured Programs
   ============================================================ */
.featured-programs {
    padding: 72px 24px;
    background: var(--bg-gray);
}

.course-highlights {
    margin-top: 40px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.highlight-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 26px 24px;
    border: 1px solid rgba(0, 0, 0, 0.06);
    box-shadow: var(--shadow-sm);
}

.highlight-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--title-dark-blue);
    margin-bottom: 14px;
}

.highlight-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.highlight-list li {
    position: relative;
    padding-left: 18px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.highlight-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    top: 0;
    color: var(--primary);
    font-weight: 900;
}

.highlight-strong {
    font-weight: 800;
    color: var(--text-primary);
    margin-right: 6px;
}

.highlight-text {
    color: var(--text-secondary);
}

.highlight-cta {
    margin-top: 16px;
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
}

.highlight-note {
    font-size: 13px;
    color: var(--text-secondary);
}

.program-grid {
    margin-top: 42px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.program-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    text-align: center;
    transition: all 0.4s;
    border: 1px solid rgba(0, 0, 0, 0.06);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.program-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

/* Badge for popular/recommended programs */
.program-badge {
    position: absolute;
    top: 14px;
    right: -30px;
    background: var(--accent);
    color: #78350F;
    font-size: 11px;
    font-weight: 700;
    padding: 4px 36px;
    transform: rotate(45deg);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
    letter-spacing: 0.05em;
}

.program-icon {
    width: 72px;
    height: 72px;
    background: var(--bg-light-blue);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 32px;
    transition: all 0.3s;
}

.program-card:hover .program-icon {
    background: var(--primary);
}

.program-card:hover .program-icon svg {
    stroke: white;
}

.program-title {
    font-size: 22px;
    font-weight: 600;
    color: var(--title-dark-blue);
    margin-bottom: 12px;
}

.program-desc {
    font-size: 15px;
    color: var(--text-secondary);
}

.program-actions {
    margin-top: 20px;
    display: flex;
    justify-content: center;
}


/* ============================================================
   Process
   ============================================================ */
.process {
    padding: 72px 24px;
    background: var(--bg-white);
}

.process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 52px;
}

.process-card {
    background: var(--bg-gray);
    border-radius: var(--radius-lg);
    padding: 26px 22px;
    border: 1px solid rgba(0, 0, 0, 0.06);
    transition: all 0.3s;
    position: relative;
}

.process-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
}

/* Connector arrow between steps */
.process-card:not(:last-child)::after {
    content: "→";
    position: absolute;
    right: -14px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 18px;
    color: var(--primary);
    font-weight: 700;
    z-index: 1;
}

.process-step {
    width: 52px;
    height: 52px;
    border-radius: 18px;
    background: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    margin-bottom: 16px;
}

.process-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--title-dark-blue);
    margin-bottom: 10px;
}

.process-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.process-cta {
    margin-top: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
}


/* ============================================================
   Gallery
   ============================================================ */
.gallery {
    padding: 72px 24px;
    background: var(--bg-white);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.gallery-item {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    aspect-ratio: 4/3;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 20%;
    transition: transform 0.6s;
}

.gallery-item:hover img {
    transform: scale(1.05);
}

.gallery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 20px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: white;
}

.gallery-title {
    font-size: 16px;
    font-weight: 600;
}


/* ============================================================
   AI Toolbox — with brand colors
   ============================================================ */
.ai-toolbox {
    padding: 72px 24px;
    background: var(--bg-light-blue);
}

.toolbox-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.toolbox-item {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: all 0.3s;
}

.toolbox-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.toolbox-avatar {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    flex-shrink: 0;
    overflow: hidden;
}

/* Brand colors for each tool */
.toolbox-avatar.chatgpt {
    background: #10A37F;
    color: white;
}

.toolbox-avatar.claude {
    background: #D4A574;
    color: white;
}

.toolbox-avatar.midjourney {
    background: #1a1a2e;
    color: white;
}

.toolbox-avatar.sd {
    background: #A855F7;
    color: white;
}

.toolbox-avatar.copilot {
    background: #24292e;
    color: white;
}

.toolbox-avatar.gamma {
    background: #8B5CF6;
    color: white;
}

.toolbox-avatar.notion {
    background: #191919;
    color: white;
}

.toolbox-avatar.runway {
    background: #0090FF;
    color: white;
}

.toolbox-avatar.default {
    background: var(--bg-light-blue);
    color: var(--primary);
}

.toolbox-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--title-dark-blue);
    margin-bottom: 4px;
}

.toolbox-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.toolbox-tag {
    font-size: 12px;
    color: var(--primary);
    background: var(--bg-light-blue);
    padding: 3px 10px;
    border-radius: 12px;
}


/* ============================================================
   Testimonials
   ============================================================ */
.testimonials {
    padding: 72px 24px;
    background: var(--bg-warm);
}

/* New: 1 large left + 3 stacked right */
.testimonials-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 40px;
    align-items: start;
}

.testimonial-featured {
    background: var(--bg-white);
    border: 1px solid rgba(0, 0, 0, 0.06);
    padding: 10px;
    border-radius: var(--radius-lg);
}

.testimonial-featured img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    display: block;
}

.testimonial-stack {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.testimonial-card {
    background: var(--bg-white);
    border: 1px solid rgba(0, 0, 0, 0.06);
    padding: 10px;
    border-radius: var(--radius-lg);
}

.testimonial-card img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    display: block;
}

/* Caption under each testimonial screenshot */
.testimonial-caption {
    text-align: center;
    margin-top: 8px;
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}


/* ============================================================
   Clients
   ============================================================ */
.clients {
    padding: 72px 24px;
    background: var(--bg-gray);
}

.client-category {
    margin-bottom: 40px;
}

.client-category-title {
    font-size: 12px;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 16px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    padding-bottom: 8px;
    display: inline-block;
}

/* Fixed: use flex-start instead of space-between */
.client-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: flex-start;
}

.client-tag {
    background: var(--bg-white);
    padding: 10px 20px;
    border-radius: 100px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    transition: all 0.3s;
    border: 1px solid rgba(0, 0, 0, 0.04);
}

.client-tag:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
    border-color: var(--primary);
}


/* ============================================================
   Free Resources
   ============================================================ */
.free-resources {
    padding: 72px 24px;
    background: var(--bg-white);
}

/* Fixed: use 1fr 1fr instead of 2fr 1fr */
.resources-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.resources-text h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--title-dark-blue);
    margin-bottom: 20px;
}

.resources-text p {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.resource-lead-tip {
    margin-top: 14px;
    font-size: 14px;
    color: var(--text-secondary);
}

.resources-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.resource-card {
    background: var(--bg-gray);
    border-radius: var(--radius-md);
    padding: 20px;
    transition: all 0.3s;
}

.resource-card:hover {
    background: var(--bg-light-blue);
    transform: translateY(-4px);
    box-shadow: var(--shadow-sm);
}

.resource-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--title-dark-blue);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.resource-title svg {
    flex-shrink: 0;
}

.resource-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: gap 0.3s;
}

.resource-btn:hover {
    gap: 12px;
}


/* ============================================================
   CTA Section
   ============================================================ */
.cta-section {
    padding: 120px 24px;
    background: var(--gradient-cta);
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
}

/* Subtle pattern overlay */
.cta-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 20% 50%, rgba(0, 82, 204, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.cta-section>* {
    position: relative;
    z-index: 1;
}

.cta-section h2 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 24px;
}

.cta-desc {
    font-size: 18px;
    color: #a1a1a6;
    max-width: 600px;
    margin: 0 auto 40px;
}

.cta-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.cta-wechat {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    color: white;
    padding: 18px 40px;
    border-radius: 100px;
    border: none;
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
}

.cta-wechat:hover {
    transform: scale(1.03);
    box-shadow: 0 12px 40px rgba(0, 82, 204, 0.35);
}

.cta-email {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: white;
    color: black;
    padding: 18px 40px;
    border-radius: 100px;
    text-decoration: none;
    font-size: 18px;
    font-weight: 600;
    transition: all 0.3s;
}

.cta-email:hover {
    transform: scale(1.03);
    box-shadow: 0 12px 40px rgba(255, 255, 255, 0.2);
}

.cta-note {
    margin: 20px auto 0;
    font-size: 14px;
    color: #86868b;
}


/* ============================================================
   Footer
   ============================================================ */
footer {
    padding: 48px 24px;
    background: var(--footer-dark);
    color: white;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-copyright {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.footer-social {
    display: flex;
    gap: 20px;
}

.social-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all 0.3s;
    cursor: pointer;
    position: relative;
}

.social-icon:hover {
    background: var(--primary);
    transform: translateY(-3px);
}

.wechat-popover {
    position: absolute;
    bottom: 56px;
    left: 50%;
    transform: translateX(-50%);
    background: white;
    border-radius: 12px;
    padding: 16px;
    box-shadow: var(--shadow-lg);
    display: none;
    z-index: 100;
}

.social-icon:hover .wechat-popover {
    display: block;
}

.wechat-popover img {
    width: 120px;
    height: 120px;
    border-radius: 8px;
}

.wechat-popover p {
    font-size: 12px;
    color: var(--text-secondary);
    text-align: center;
    margin-top: 8px;
}


/* ============================================================
   Scroll Fade-In Animation
   ============================================================ */
.fade-in-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Fallback: ensure content is visible even if JS fails */
.no-js .fade-in-up,
.fade-in-up.visible {
    opacity: 1;
    transform: none;
}


/* ============================================================
   Scroll Progress Indicator
   ============================================================ */
.scroll-progress {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    height: 3px;
    z-index: 999;
    background: rgba(0, 0, 0, 0.04);
}

.scroll-progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--primary), #3B82F6);
    transition: width 0.1s linear;
}


/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-content {
        padding-left: 0;
        text-align: center;
    }

    .hero-cta {
        justify-content: center;
    }

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

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

    .process-card:not(:last-child)::after {
        display: none;
    }

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

    .resources-container {
        grid-template-columns: 1fr;
    }

    .resources-cards {
        grid-template-columns: 1fr 1fr;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .header-actions .lang-switcher {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero-title {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .section-title {
        font-size: 24px;
    }

    .stat-number {
        font-size: 32px;
    }

    /* Reduce section spacing on mobile */
    .credentials,
    .featured-programs,
    .process,
    .gallery,
    .ai-toolbox,
    .clients,
    .testimonials,
    .free-resources {
        padding-top: 50px;
        padding-bottom: 50px;
    }

    /* Tighter header on mobile */
    .btn-primary {
        padding: 8px 16px;
        font-size: 13px;
    }

    .header-container {
        padding: 0 16px;
    }

    .program-grid,
    .gallery-grid,
    .toolbox-grid {
        grid-template-columns: 1fr;
    }

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

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

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

    .lead-form-row {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .floating-cta {
        display: flex;
    }

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

    body {
        padding-bottom: 92px;
    }

    .footer-container {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }

    .resources-cards {
        grid-template-columns: 1fr;
    }

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