/* ==============================================
   SPROUT EDUCATION — OFFICIAL WEBSITE
   Design System: PMFrame Editorial
   Sharp corners · Border-defined · Restrained color
   ============================================== */

/* ------- Fonts: System font stack (China-friendly) ------- */

/* ------- CSS Custom Properties ------- */
:root {
    /* Brand Colors */
    --color-brand-green: #2D5D4E;
    --color-brand-green-light: #3A7A66;
    --color-brand-green-dark: #1E4639;
    --color-brand-green-50: rgba(45, 93, 78, 0.08);
    --color-brand-cyan: #3A8C96;
    --color-brand-pink: #C05050;

    /* Semantic */
    --color-primary: var(--color-brand-green);
    --color-success: #2D5D4E;
    --color-warning: #B8860B;
    --color-danger: #C05050;
    --color-info: #3A8C96;

    /* Backgrounds */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F5F6F5;
    --bg-dark: #0F172A;
    --bg-dark-surface: #1E293B;

    /* Text */
    --text-primary: #1A1A1A;
    --text-secondary: #666666;
    --text-tertiary: #999999;
    --text-inverse: #FFFFFF;

    /* Borders */
    --border-primary: #DEDEDE;
    --border-secondary: #ECECEC;

    /* Typography */
    --font-sans: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;

    /* Spacing */
    --space-1: 0.375rem;
    --space-2: 0.75rem;
    --space-3: 1rem;
    --space-4: 1.5rem;
    --space-5: 2rem;
    --space-6: 2.5rem;
    --space-8: 3rem;
    --space-10: 4rem;
    --space-12: 5rem;
    --space-16: 6rem;
    --space-20: 8rem;
    --space-24: 10rem;

    /* Transitions */
    --transition-fast: 100ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 350ms ease;
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-sans);
    font-size: 15px;
    font-weight: 400;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

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

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

button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
}

::selection {
    background-color: var(--color-brand-green-50);
    color: var(--color-brand-green-dark);
}

/* ------- Container ------- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.section {
    padding: var(--space-12) 0;
}

/* ==============================================
   NAVIGATION
   ============================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: all var(--transition-base);
}

.nav.scrolled {
    border-bottom-color: var(--border-primary);
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo img {
    height: 32px;
    width: auto;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.nav-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
    letter-spacing: 0.01em;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--text-primary);
    transition: width var(--transition-base);
    pointer-events: none;
}

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

.nav-link:hover::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.nav-cta {
    display: inline-flex;
    align-items: center;
    padding: 8px 20px;
    background: var(--text-primary);
    color: var(--text-inverse);
    font-size: 13px;
    font-weight: 500;
    transition: background var(--transition-fast);
}

.nav-cta:hover {
    background: #333;
}

.nav-portal-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    border: 1px solid var(--border-primary);
    background: transparent;
    transition: all var(--transition-fast);
}

.nav-portal-btn:hover {
    background: var(--text-primary);
    color: var(--text-inverse);
    border-color: var(--text-primary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 28px;
    padding: 4px 0;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    height: 1.5px;
    background: var(--text-primary);
    transition: all var(--transition-base);
}

/* ==============================================
   HERO
   ============================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(255, 255, 255, 0.92) 0%,
        rgba(255, 255, 255, 0.75) 40%,
        rgba(255, 255, 255, 0.4) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-20) var(--space-6) var(--space-12);
    width: 100%;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 20px;
    border: 1px solid var(--border-primary);
    background: rgba(255,255,255,0.6);
    backdrop-filter: blur(6px);
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.06em;
    margin-bottom: var(--space-8);
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-badge-dot {
    width: 7px;
    height: 7px;
    background: var(--color-brand-green);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero-title {
    font-size: clamp(3rem, 7.5vw, 6.5rem);
    font-weight: 800;
    line-height: 1.08;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: var(--space-6);
    animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-title-accent {
    color: var(--color-brand-green);
}

.hero-subtitle {
    font-size: clamp(1rem, 1.4vw, 1.25rem);
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: var(--space-10);
    letter-spacing: 0.1em;
    animation: fadeInUp 0.8s ease 0.6s both;
}

.hero-actions {
    display: flex;
    gap: var(--space-3);
    animation: fadeInUp 0.8s ease 0.8s both;
}

.btn-primary-lg {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 36px;
    background: var(--text-primary);
    color: var(--text-inverse);
    font-size: 16px;
    font-weight: 600;
    transition: all var(--transition-base);
}

.btn-primary-lg:hover {
    background: #333;
}

.btn-outline-lg {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 36px;
    border: 1px solid var(--border-primary);
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 500;
    transition: all var(--transition-base);
}

.btn-outline-lg:hover {
    border-color: var(--text-primary);
    background: var(--bg-secondary);
}

.btn-light {
    background: var(--text-primary);
    color: var(--text-inverse);
}

.btn-light:hover {
    background: #333;
}

.hero-scroll-hint {
    position: absolute;
    bottom: var(--space-6);
    left: var(--space-6);
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-tertiary);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    z-index: 1;
}

.hero-scroll-line {
    width: 40px;
    height: 1px;
    background: var(--border-primary);
    position: relative;
    overflow: hidden;
}

.hero-scroll-line::after {
    content: '';
    position: absolute;
    left: -100%;
    top: 0;
    width: 100%;
    height: 100%;
    background: var(--text-primary);
    animation: scrollLine 2s ease infinite;
}

@keyframes scrollLine {
    0% { left: -100%; }
    100% { left: 100%; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==============================================
   STATS BAR
   ============================================== */
.stats-bar {
    border-bottom: 1px solid var(--border-primary);
}

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

.stat-item {
    padding: var(--space-8) var(--space-6);
    text-align: center;
    border-right: 1px solid var(--border-primary);
}

.stat-item:last-child {
    border-right: none;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-2);
}

.stat-label {
    font-size: 13px;
    font-weight: 400;
    color: var(--text-tertiary);
    letter-spacing: 0.02em;
}

/* ==============================================
   SECTION HEADERS
   ============================================== */
.section-header {
    text-align: center;
    margin-bottom: var(--space-12);
}

.section-tag {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-brand-green);
    margin-bottom: var(--space-3);
}

.section-tag-light {
    color: var(--color-brand-green-light);
}

.section-title {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.15;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
}

.section-title-light {
    color: var(--text-primary);
}

.section-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 560px;
    margin: 0 auto;
}

/* ==============================================
   SERVICES
   ============================================== */
.services-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    border: 1px solid var(--border-primary);
    margin-bottom: 0;
}

.service-card {
    border: 1px solid var(--border-primary);
    margin: -1px 0 0 -1px;
    display: flex;
    flex-direction: column;
}

.service-card-featured {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr 1fr;
}

.service-card-img {
    overflow: hidden;
    position: relative;
}

.service-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.service-card:hover .service-card-img img {
    transform: scale(1.03);
}

.service-card-body {
    padding: var(--space-8) var(--space-6);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.service-number {
    font-size: 12px;
    font-weight: 600;
    color: var(--color-brand-green);
    letter-spacing: 0.06em;
    margin-bottom: var(--space-3);
}

.service-title {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-3);
}

.service-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-4);
}

.service-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.service-features li {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    padding-left: 20px;
    position: relative;
}

.service-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 7px;
    width: 8px;
    height: 8px;
    border: 1.5px solid var(--color-brand-green);
}

/* Service Mini Cards */
.services-extra-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    border: 1px solid var(--border-primary);
    margin-top: -1px;
}

.service-mini-card {
    padding: var(--space-6) var(--space-5);
    border: 1px solid var(--border-primary);
    margin: -1px 0 0 -1px;
    transition: background var(--transition-base);
}

.service-mini-card:hover {
    background: var(--bg-secondary);
}

.service-mini-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-brand-green);
    margin-bottom: var(--space-3);
}

.service-mini-card h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: var(--space-2);
}

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

/* ==============================================
   ABOUT / WHY US
   ============================================== */
.section-dark {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.about-left {
    position: sticky;
    top: 120px;
}

.about-intro {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin: var(--space-5) 0 var(--space-8);
}

.about-right {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.about-card {
    padding: var(--space-6);
    border: 1px solid var(--border-primary);
    margin-top: -1px;
    transition: all var(--transition-base);
    background: var(--bg-primary);
}

.about-card:first-child {
    margin-top: 0;
}

.about-card:hover {
    background: var(--bg-secondary);
    border-color: var(--text-tertiary);
}

.about-card-number {
    font-size: 12px;
    font-weight: 600;
    color: var(--color-brand-green);
    letter-spacing: 0.06em;
    margin-bottom: var(--space-2);
}

.about-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--space-2);
    letter-spacing: -0.01em;
}

.about-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==============================================
   UNIVERSITY GRID
   ============================================== */
.uni-marquee-wrapper {
    overflow: hidden;
    border: 1px solid var(--border-primary);
}

.uni-grid-editorial {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
}

.uni-cell {
    padding: var(--space-4) var(--space-5);
    border: 1px solid var(--border-primary);
    margin: -1px 0 0 -1px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    transition: all var(--transition-fast);
    min-height: 80px;
    justify-content: center;
}

.uni-cell:hover {
    background: var(--bg-secondary);
    position: relative;
    z-index: 1;
}

.uni-rank {
    font-size: 11px;
    font-weight: 600;
    color: var(--color-brand-green);
    letter-spacing: 0.02em;
}

.uni-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.uni-country {
    font-size: 11px;
    color: var(--text-tertiary);
}

/* ==============================================
   TESTIMONIALS
   ============================================== */
.section-warm {
    background: var(--bg-secondary);
}

.testimonial-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
    border: 1px solid var(--border-primary);
}
@media(min-width: 768px) {
    .testimonial-grid { grid-template-columns: 1fr 1fr; }
}

.testimonial-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    margin: -1px 0 0 -1px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    transition: background var(--transition-base);
}
.testimonial-card:not(.testimonial-featured) {
    padding: var(--space-6);
}
.testimonial-card:hover {
    background: var(--bg-secondary);
}

.testimonial-featured {
    display: grid;
    grid-template-rows: auto 1fr;
    border-right: 1px solid var(--border-primary);
}

.testimonial-img {
    height: 320px;
    overflow: hidden;
}

.testimonial-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top;
}

.testimonial-body {
    padding: var(--space-6);
    background: var(--bg-primary);
}

.testimonial-quote {
    color: var(--border-primary);
    margin-bottom: var(--space-3);
}

.testimonial-text {
    font-size: 15px;
    font-weight: 400;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: var(--space-5);
    font-style: normal;
}

.testimonial-author-name {
    font-size: 15px;
    font-weight: 600;
}

.testimonial-author-info {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-top: 2px;
}

.testimonial-side {
    display: flex;
    flex-direction: column;
}

.testimonial-card-mini {
    flex: 1;
    padding: var(--space-5) var(--space-6);
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-primary);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.testimonial-card-mini:last-child {
    border-bottom: none;
}

.testimonial-card-mini blockquote {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-3);
    font-style: normal;
}

.testimonial-card-mini .testimonial-author {
    margin-top: auto;
}

/* ==============================================
   TIMELINE
   ============================================== */
.timeline {
    max-width: 720px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 5px;
    top: var(--space-6);
    bottom: var(--space-6);
    width: 1px;
    background: var(--border-primary);
}

.timeline-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-6);
    padding: var(--space-5) 0;
    position: relative;
}

.timeline-dot {
    width: 11px;
    height: 11px;
    border-radius: 50%;
    border: 2px solid var(--border-primary);
    background: var(--bg-primary);
    flex-shrink: 0;
    margin-top: 3px;
    position: relative;
    z-index: 1;
    transition: all var(--transition-base);
}

.timeline-item:hover .timeline-dot {
    border-color: var(--color-brand-green);
    background: var(--color-brand-green);
}

.timeline-content {
    flex: 1;
}

.timeline-step {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-1);
    display: block;
}

.timeline-content h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--space-2);
    letter-spacing: -0.01em;
}

.timeline-content p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==============================================
   CTA / CONTACT
   ============================================== */
.section-cta {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-top: 1px solid var(--border-primary);
}

.cta-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    align-items: start;
}

.cta-title {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.2;
    margin-bottom: var(--space-4);
}

.cta-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-8);
}

.cta-contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.cta-contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: 14px;
    color: var(--text-secondary);
}

.cta-contact-item svg {
    flex-shrink: 0;
    color: var(--color-brand-green);
}

/* Contact Form */
.cta-form {
    background: var(--bg-primary);
    padding: var(--space-8);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    border: 1px solid var(--border-primary);
}

.form-row-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-label .required {
    color: var(--color-danger);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 10px 12px;
    font-size: 14px;
    color: var(--text-primary);
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    outline: none;
    border-radius: 0;
    -webkit-appearance: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-tertiary);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: var(--text-primary);
    box-shadow: 0 0 0 2px #fff, 0 0 0 4px rgba(222, 222, 222, 0.5);
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%23999' viewBox='0 0 16 16'%3E%3Cpath d='M4.646 6.646a.5.5 0 0 1 .708 0L8 9.293l2.646-2.647a.5.5 0 0 1 .708.708l-3 3a.5.5 0 0 1-.708 0l-3-3a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

.form-textarea {
    resize: vertical;
    min-height: 80px;
}

.btn-submit-form {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 14px 24px;
    background: var(--text-primary);
    color: var(--text-inverse);
    font-size: 15px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.btn-submit-form:hover {
    background: #333;
}

/* ==============================================
   FOOTER
   ============================================== */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-primary);
    padding: 0;
}

/* CTA Strip */
.footer-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-6);
    padding: var(--space-8) 0;
    border-bottom: 1px solid var(--border-primary);
}
.footer-cta-text {
    font-size: 20px;
    font-weight: 300;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}
.footer-cta-btn {
    display: inline-block;
    padding: 0.6rem 2rem;
    background: var(--text-primary);
    color: #fff !important;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    transition: background var(--transition-base);
}
.footer-cta-btn:hover {
    background: var(--color-brand-green);
    color: #fff !important;
}

/* Brand Statement */
.footer-brand-statement {
    text-align: center;
    padding: var(--space-10) 0 var(--space-6);
}
.footer-logo {
    height: 72px;
    max-width: 100%;
    width: auto;
    margin: 0 auto var(--space-6);
    display: block;
}
.footer-motto {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.15em;
    margin-bottom: var(--space-1);
}
.footer-motto-en {
    font-size: 13px;
    font-weight: 400;
    color: var(--text-tertiary);
    letter-spacing: 0.03em;
    font-style: italic;
}

/* Horizontal Nav */
.footer-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0;
    padding: var(--space-5) 0;
    border-top: 1px solid var(--border-primary);
    border-bottom: 1px solid var(--border-primary);
}
.footer-nav a {
    font-size: 13px;
    color: var(--text-secondary);
    padding: 0 var(--space-3);
    transition: color var(--transition-fast);
    white-space: nowrap;
}
.footer-nav a:hover { color: var(--text-primary); }
.footer-nav-dot {
    width: 3px;
    height: 3px;
    background: var(--border-primary);
    border-radius: 50%;
    flex-shrink: 0;
}

/* Social */
.footer-social {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    padding: var(--space-5) 0;
}
.footer-social-link {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-primary);
    color: var(--text-tertiary);
    transition: all var(--transition-base);
}
.footer-social-link:hover {
    border-color: var(--text-primary);
    color: var(--text-primary);
}

/* Legal Strip */
.footer-legal {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-1);
    padding: var(--space-4) 0;
    border-top: 1px solid var(--border-primary);
    font-size: 11px;
    color: var(--text-tertiary);
}
.footer-legal a {
    color: var(--text-tertiary);
    transition: color var(--transition-fast);
}
.footer-legal a:hover { color: var(--text-primary); }
.footer-legal-sep {
    color: var(--border-primary);
    margin: 0 2px;
}

/* ==============================================
   BACK TO TOP
   ============================================== */
.back-to-top {
    position: fixed;
    bottom: var(--space-8);
    right: var(--space-8);
    width: 44px;
    height: 44px;
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: var(--z-sticky);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-base);
}
.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.back-to-top:hover {
    background: var(--text-primary);
    color: #fff;
    border-color: var(--text-primary);
}
@media (max-width: 768px) {
    .back-to-top {
        bottom: var(--space-4);
        right: var(--space-4);
    }
}

/* ==============================================
   SCROLL ANIMATIONS
   ============================================== */
.reveal {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 1.0s cubic-bezier(0.2, 0.8, 0.2, 1), transform 1.0s cubic-bezier(0.2, 0.8, 0.2, 1);
    will-change: opacity, transform;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ==============================================
   RESPONSIVE
   ============================================== */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: 1fr;
    }

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

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

    .uni-grid-editorial {
        grid-template-columns: repeat(4, 1fr);
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }

    .about-left {
        position: static;
    }

    .cta-grid {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-6);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        border-bottom: 1px solid var(--border-primary);
        flex-direction: column;
        padding: var(--space-4) var(--space-6);
        gap: 0;
    }

    .nav-links.open {
        display: flex;
    }

    .nav-links .nav-link {
        padding: var(--space-3) 0;
        border-bottom: 1px solid var(--border-secondary);
        width: 100%;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-cta {
        display: none;
    }

    .hero-content {
        padding-top: 140px;
    }

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

    .btn-primary-lg,
    .btn-outline-lg {
        width: 100%;
        justify-content: center;
    }

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

    .stat-item:nth-child(2) {
        border-right: none;
    }

    .stat-item:nth-child(3),
    .stat-item:nth-child(4) {
        border-top: 1px solid var(--border-primary);
    }

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

    .services-extra-grid {
        grid-template-columns: 1fr;
    }

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

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

    .testimonial-featured {
        border-right: none;
        border-bottom: 1px solid var(--border-primary);
    }

    .form-row-2 {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--space-3);
        text-align: center;
    }

    .section {
        padding: var(--space-12) 0;
    }

    .container {
        padding: 0 var(--space-4);
    }

    .section-desc br {
        display: none;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .stat-item {
        border-right: none;
        border-bottom: 1px solid var(--border-primary);
    }

    .stat-item:last-child {
        border-bottom: none;
    }

    .uni-grid-editorial {
        grid-template-columns: 1fr;
    }
}

/* ==============================================
   SUB-PAGE SHARED COMPONENTS
   Design Language: SproutPortal Sharp Editorial
   ============================================== */

/* ── CTA Section (reusable dark section with centered text) ── */
.sp-cta-section {
    background: var(--bg-secondary);
    padding: 4rem 0;
    color: var(--text-primary);
    text-align: center;
    border-top: 1px solid var(--border-primary);
}
.sp-cta-section h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 800;
    color: var(--text-primary);
    margin: 0 0 .75rem;
    letter-spacing: -0.02em;
}
.sp-cta-section p {
    color: var(--text-secondary);
    max-width: 480px;
    margin: 0 auto 1.5rem;
    line-height: 1.7;
}

/* ── Dark Feature Card (used on team FAO, mentoring 4D, PBL process) ── */
.sp-dark-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: 0;
    padding: 1.5rem;
    transition: border-color var(--transition-base);
}
.sp-dark-card:hover {
    border-color: var(--text-tertiary);
}

/* ── Light Feature Card (used on team values, mentor types, include items) ── */
.sp-light-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: 0;
    box-shadow: none;
    padding: 1.5rem;
    transition: border-color var(--transition-base);
}
.sp-light-card:hover {
    border-color: var(--text-tertiary);
}

/* ── Outcome Badge ── */
.sp-badge {
    display: inline-block;
    font-size: .78rem;
    font-weight: 600;
    padding: .3rem .75rem;
    border-radius: 0;
    background: var(--color-brand-green-50);
    color: var(--color-brand-green);
}

/* ── Comparison Table ── */
.sp-compare-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    border: 1px solid var(--border-primary);
    border-radius: 0;
    overflow: hidden;
}
@media (max-width: 600px) { .sp-compare-grid { grid-template-columns: 1fr; } }
.sp-compare-col {
    background: var(--bg-primary);
    padding: 2rem;
}
.sp-compare-col + .sp-compare-col {
    border-left: 1px solid var(--border-primary);
}
@media (max-width: 600px) {
    .sp-compare-col + .sp-compare-col {
        border-left: none;
        border-top: 1px solid var(--border-primary);
    }
}
.sp-compare-col h4 {
    font-size: .875rem;
    font-weight: 700;
    margin: 0 0 1rem;
    padding-bottom: .75rem;
    border-bottom: 1px solid var(--border-secondary);
}
.sp-compare-col ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: .5rem;
}
.sp-compare-col ul li {
    font-size: .85rem;
    color: var(--text-secondary);
    display: flex;
    gap: .5rem;
    align-items: flex-start;
}
.sp-compare-bad h4 { color: var(--color-danger); }
.sp-compare-bad ul li::before { content: '✗'; color: var(--color-danger); flex-shrink: 0; opacity: .6; }
.sp-compare-good h4 { color: var(--color-success); }
.sp-compare-good ul li::before { content: '✓'; color: var(--color-success); flex-shrink: 0; opacity: .6; }

/* ── Comparison Table (data-table style) ── */
.sp-diff-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 2rem;
    font-size: .875rem;
}
.sp-diff-table th {
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: .875rem 1rem;
    text-align: left;
    font-weight: 600;
}
.sp-diff-table td {
    padding: .75rem 1rem;
    border-bottom: 1px solid var(--border-secondary);
    color: var(--text-secondary);
}
.sp-diff-table tr:last-child td { border-bottom: none; }
.sp-diff-table td:nth-child(2) { color: var(--color-danger); }
.sp-diff-table td:nth-child(3) { color: var(--color-success); font-weight: 500; }

/* ── Timeline (editorial, no blue) ── */
.sp-timeline { position: relative; padding: 2rem 0; }
.sp-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--border-primary);
}
@media (max-width: 680px) { .sp-timeline::before { left: 24px; } }
.sp-tl-item {
    display: grid;
    grid-template-columns: 1fr 60px 1fr;
    gap: 1rem;
    align-items: start;
    margin-bottom: 2rem;
}
@media (max-width: 680px) { .sp-tl-item { grid-template-columns: 48px 1fr; } }
.sp-tl-center { text-align: center; position: relative; }
.sp-tl-dot {
    width: 40px;
    height: 40px;
    background: var(--text-primary);
    border-radius: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-inverse);
    font-size: .8rem;
    font-weight: 700;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}
.sp-tl-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: 0;
    padding: 1.25rem;
}
.sp-tl-card h4 {
    font-size: .9rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 .4rem;
}
.sp-tl-card p {
    font-size: .8rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.55;
}
.sp-tl-grade {
    font-size: .72rem;
    font-weight: 800;
    color: var(--color-brand-green);
}
.sp-tl-empty { opacity: 0; pointer-events: none; }
@media (max-width: 680px) { .sp-tl-card.sp-tl-right { display: none; } .sp-tl-empty { display: none; } }

/* ── Country Cards (editorial dark, no gradient) ── */
.sp-country-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    border: 1px solid var(--border-primary);
}
@media (max-width: 600px) { .sp-country-grid { grid-template-columns: 1fr; } }
.sp-country-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    margin: -1px 0 0 -1px;
    border-radius: 0;
    padding: 1.75rem;
    color: var(--text-primary);
    position: relative;
    overflow: hidden;
    z-index: 1;
}
.sp-country-card::before {
    content: '';
    position: absolute;
    bottom: -20%;
    right: -10%;
    width: 260px;
    height: 180px;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.1;
    z-index: -1;
    filter: blur(4px) saturate(1.5);
    pointer-events: none;
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.sp-country-card[data-country="us"]::before { background-image: url('../images/flags/us.svg'); }
.sp-country-card[data-country="uk"]::before { background-image: url('../images/flags/uk.svg'); }
.sp-country-card[data-country="ca"]::before { background-image: url('../images/flags/ca.svg'); }

.sp-country-card:hover::before {
    opacity: 0.2;
    transform: scale(1.05) translate(-2%, -2%);
    filter: blur(2px) saturate(1.2);
}
.sp-country-card h3 { font-size: 1rem; font-weight: 700; margin: 0 0 .5rem; }
.sp-country-card p { font-size: .8rem; color: var(--text-secondary); margin: 0 0 1rem; line-height: 1.5; }
.sp-country-card ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: .35rem; }
.sp-country-card ul li { font-size: .78rem; color: var(--text-secondary); display: flex; align-items: center; gap: .4rem; }
.sp-country-card ul li::before { content: '→'; color: var(--color-brand-green); }

/* ── Include List ── */
.sp-include-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 0;
    border: 1px solid var(--border-primary);
    margin-top: 2rem;
}
.sp-include-item {
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    margin: -1px 0 0 -1px;
    border-radius: 0;
    padding: 1.1rem 1.25rem;
    display: flex;
    align-items: flex-start;
    gap: .75rem;
    font-size: .875rem;
    color: var(--text-secondary);
}
.sp-include-item::before {
    content: '✓';
    color: var(--color-brand-green);
    font-weight: 700;
    flex-shrink: 0;
    margin-top: .05rem;
}

/* ── Parent View Preview (dark panel) ── */
.sp-portal-preview {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: 0;
    padding: 2rem;
    color: var(--text-primary);
}
.sp-portal-preview h4 {
    font-size: .875rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin: 0 0 1.25rem;
    letter-spacing: .04em;
    text-transform: uppercase;
}
.sp-parent-item {
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: 0;
    padding: 1rem;
    margin-bottom: .75rem;
    display: flex;
    align-items: center;
    gap: .75rem;
}
.sp-parent-item:last-child { margin-bottom: 0; }
.sp-parent-item-type {
    font-size: .75rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: .2rem;
}
.sp-parent-item-desc {
    font-size: .8rem;
    color: var(--text-primary);
}
.sp-parent-item-time {
    font-size: .7rem;
    color: var(--text-tertiary);
    white-space: nowrap;
}
/* ==============================================
   RESULTS TABS
   ============================================== */
.results-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
    margin-bottom: var(--space-8);
    border-bottom: 1px solid var(--border-primary);
}

.results-tab-btn {
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    padding: var(--space-3) var(--space-4);
    font-family: inherit;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-tertiary);
    cursor: pointer;
    transition: all var(--transition-base);
    margin-bottom: -1px;
}

.results-tab-btn:hover {
    color: var(--text-primary);
}

.results-tab-btn.active {
    color: var(--color-brand-green);
    border-bottom-color: var(--color-brand-green);
}

.results-tab-pane {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.results-tab-pane.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ==============================================
   LANGUAGE SWITCHER
   ============================================== */
.lang-switcher {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    border: 1px solid var(--border-primary);
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.04em;
    margin-right: 4px;
}

.lang-btn {
    color: var(--text-tertiary);
    text-decoration: none;
    transition: color var(--transition-fast);
    padding: 2px 0;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.05em;
}

.lang-btn:hover { color: var(--text-primary); }
.lang-btn.active { color: var(--text-primary); }

.lang-sep {
    color: var(--border-primary);
    font-size: 10px;
    margin: 0 1px;
}

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

/* ==============================================
   WECHAT / MOBILE BROWSER COMPATIBILITY
   ============================================== */

/* Prevent auto-zoom on input focus (WeChat WebView) */
@media screen and (max-width: 768px) {
    input[type="text"],
    input[type="email"],
    input[type="tel"],
    input[type="number"],
    input[type="password"],
    select,
    textarea {
        font-size: 16px !important; /* iOS won't zoom if ≥16px */
    }
}

/* WeChat tap highlight removal */
* { -webkit-tap-highlight-color: transparent; }

/* Safe area inset for iPhone notch */
body {
    padding-top: env(safe-area-inset-top);
    padding-bottom: env(safe-area-inset-bottom);
}

/* Fix form inputs within WeChat not inheriting font */
input, select, textarea, button {
    font-family: inherit;
}