/* ==========================
   智绘天行官网 - 样式表
   ========================== */

/* CSS Variables */
:root {
    --bg-primary: #F5F1EB;
    --bg-secondary: #EDE8E1;
    --bg-card: rgba(255, 255, 255, 0.85);
    --bg-card-hover: rgba(255, 255, 255, 0.98);
    --border-color: rgba(0, 0, 0, 0.08);
    --border-hover: rgba(0, 0, 0, 0.15);
    --text-primary: #3D3D3D;
    --text-secondary: #6B6B6B;
    --text-muted: #9B9B9B;
    --accent-purple: #8E9EAB;
    --accent-blue: #7A9E9F;
    --accent-cyan: #9CAF88;
    --gradient-main: linear-gradient(135deg, #8E9EAB 0%, #7A9E9F 50%, #9CAF88 100%);
    --gradient-text: linear-gradient(135deg, #8E9EAB 0%, #7A9E9F 50%, #9CAF88 100%);
    --shadow-glow: 0 0 40px rgba(122, 158, 159, 0.15);
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.08);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    overflow-wrap: break-word;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast);
}

ul {
    list-style: none;
}

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

/* Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.text-nowrap {
    white-space: nowrap;
}

.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all var(--transition-normal);
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-main);
    color: #fff;
    box-shadow: 0 4px 20px rgba(122, 158, 159, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(142, 158, 171, 0.35), 0 0 60px rgba(122, 158, 159, 0.25);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-hover);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(0, 0, 0, 0.03);
    border-color: rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
}

/* Section Common */
.section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 64px;
}

.section-tag {
    display: inline-block;
    padding: 8px 24px;
    background: rgba(122, 158, 159, 0.12);
    border: 1px solid rgba(122, 158, 159, 0.25);
    border-radius: 100px;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--accent-blue);
    letter-spacing: 0.5px;
    margin-bottom: 20px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==========================
   NAVBAR
   ========================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: all var(--transition-normal);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(245, 241, 235, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 0;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 1001;
}

.logo-img {
    width: 56px;
    height: 56px;
    object-fit: contain;
    filter: brightness(1.2);
    transform: translateY(-6px);
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 0.5px;
    line-height: 1;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 500;
    position: relative;
    padding: 4px 0;
    white-space: nowrap;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-main);
    transition: width var(--transition-normal);
    border-radius: 2px;
}

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

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

.nav-cta {
    display: inline-flex;
    padding: 10px 24px;
    background: var(--gradient-main);
    color: #fff;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 15px rgba(122, 158, 159, 0.3);
}

.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(122, 158, 159, 0.4);
}

/* Mobile Nav Toggle */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    position: relative;
    transition: all var(--transition-normal);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-normal);
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    top: 8px;
}

.nav-toggle.active .hamburger {
    background: transparent;
}

.nav-toggle.active .hamburger::before {
    top: 0;
    transform: rotate(45deg);
}

.nav-toggle.active .hamburger::after {
    top: 0;
    transform: rotate(-45deg);
}

/* ==========================
   HERO SECTION
   ========================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 120px 24px 80px;
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-particles canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.hero-gradient {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(142, 158, 171, 0.2) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(122, 158, 159, 0.12) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 80%, rgba(156, 175, 136, 0.12) 0%, transparent 50%);
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    animation: fadeInUp 1s ease forwards;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(122, 158, 159, 0.12);
    border: 1px solid rgba(122, 158, 159, 0.25);
    border-radius: 100px;
    font-size: 0.9rem;
    color: var(--accent-blue);
    margin-bottom: 32px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-cyan);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta-group {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    width: 100%;
    max-width: 700px;
    margin: 0 auto;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
    transition: all var(--transition-normal);
}

.stat-item:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.hero-scroll {
    position: absolute;
    bottom: 18px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.scroll-text {
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 2px;
    text-transform: uppercase;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--accent-blue), transparent);
    animation: scrollLine 2s infinite;
}

/* ==========================
   ABOUT SECTION
   ========================== */
.about {
    background: var(--bg-secondary);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.about-card {
    padding: 32px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
}

.about-card:hover {
    border-color: var(--accent-purple);
    transform: translateY(-8px);
    box-shadow: var(--shadow-glow);
}

.about-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(122, 158, 159, 0.12);
    border-radius: var(--radius-md);
    color: var(--accent-blue);
}

.about-icon svg {
    width: 28px;
    height: 28px;
}

.about-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.about-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ==========================
   SERVICES SECTION
   ========================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.service-card {
    padding: 40px 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-main);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

.service-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-6px);
    box-shadow: var(--shadow-glow);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card-wide {
    grid-column: span 2;
}

.service-num {
    position: absolute;
    top: 20px;
    right: 24px;
    font-size: 3rem;
    font-weight: 800;
    color: rgba(0, 0, 0, 0.03);
    line-height: 1;
}

.service-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(122, 158, 159, 0.12);
    border-radius: var(--radius-md);
    color: var(--accent-blue);
    margin-bottom: 24px;
}

.service-icon svg {
    width: 28px;
    height: 28px;
}

.service-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.service-card > p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.service-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.service-features li {
    font-size: 0.8rem;
    color: var(--text-muted);
    padding: 4px 12px;
    background: rgba(0, 0, 0, 0.03);
    border-radius: 100px;
    border: 1px solid var(--border-color);
}

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

.scenario-card {
    padding: 32px 24px;
}

.scenario-card h3 {
    font-size: 1.1rem;
    margin-bottom: 12px;
}

.scenario-card > p {
    font-size: 0.9rem;
    margin-bottom: 0;
}

/* ==========================
   PRODUCTS SECTION
   ========================== */
.products {
    background: var(--bg-secondary);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.product-card {
    padding: 40px 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    position: relative;
    backdrop-filter: blur(10px);
}

.product-card:hover {
    border-color: var(--accent-purple);
    transform: translateY(-6px);
    box-shadow: var(--shadow-glow);
}

.product-featured {
    grid-column: span 2;
    display: flex;
    flex-direction: column;
    gap: 24px;
    padding: 48px 40px;
    position: relative;
}

.product-featured::after {
    content: '';
    position: absolute;
    left: 0;
    top: 28px;
    bottom: 28px;
    width: 4px;
    background: var(--gradient-main);
    border-radius: 0 4px 4px 0;
}

.product-header {
    display: flex;
    align-items: center;
    gap: 24px;
}

.product-badge {
    position: absolute;
    top: 20px;
    right: 24px;
    padding: 4px 14px;
    background: var(--gradient-main);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 100px;
}

.product-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(122, 158, 159, 0.12);
    border-radius: var(--radius-md);
    color: var(--accent-blue);
    flex-shrink: 0;
}

.product-icon svg {
    width: 32px;
    height: 32px;
}

.product-featured .product-icon {
    width: 72px;
    height: 72px;
}

.product-featured .product-icon svg {
    width: 36px;
    height: 36px;
}

.product-featured h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0;
}

.product-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.product-card > p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.product-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    font-size: 0.8rem;
    color: var(--accent-cyan);
    padding: 4px 12px;
    background: rgba(156, 175, 136, 0.12);
    border: 1px solid rgba(156, 175, 136, 0.25);
    border-radius: 100px;
}

.product-screenshot {
    margin-top: 20px;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.product-screenshot img {
    width: 100%;
    height: auto;
    display: block;
}

/* ==========================
   TEAM SECTION
   ========================== */
.team-category {
    margin-bottom: 48px;
}

.team-category-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 32px;
    padding-left: 16px;
    border-left: 3px solid var(--accent-purple);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.team-card {
    display: flex;
    gap: 20px;
    padding: 28px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
}

.team-card:hover {
    border-color: var(--accent-purple);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.team-avatar {
    position: relative;
    flex-shrink: 0;
}

.avatar-placeholder {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: var(--gradient-main);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
}

.team-avatar img {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    object-fit: cover;
    object-position: top center;
    display: block;
}

.team-title-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 4px;
}

.team-title-row .team-name {
    margin-bottom: 0;
}

.team-badge {
    display: inline-flex;
    align-self: center;
    padding: 3px 10px;
    background: var(--accent-cyan);
    color: var(--bg-primary);
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 100px;
    white-space: nowrap;
}

.team-info {
    flex: 1;
    min-width: 0;
}

.team-name {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.team-role {
    font-size: 0.85rem;
    color: var(--accent-blue);
    font-weight: 500;
    margin-bottom: 8px;
}

.team-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 12px;
}

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

.team-tags span {
    font-size: 0.75rem;
    color: var(--text-muted);
    padding: 2px 10px;
    background: rgba(0, 0, 0, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 100px;
}

/* ==========================
   CASES SECTION
   ========================== */
.cases {
    background: var(--bg-secondary);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.case-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
}

.case-card:hover {
    border-color: var(--accent-purple);
    transform: translateY(-6px);
    box-shadow: var(--shadow-glow);
}

.case-image {
    height: 200px;
    background: linear-gradient(135deg, rgba(142, 158, 171, 0.15) 0%, rgba(122, 158, 159, 0.12) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid var(--border-color);
    overflow: hidden;
}

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.case-img-placeholder {
    width: 80px;
    height: 80px;
    color: var(--accent-blue);
    opacity: 0.6;
}

.case-img-placeholder svg {
    width: 100%;
    height: 100%;
}

.case-content {
    padding: 28px;
}

.case-tag {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(156, 175, 136, 0.15);
    border: 1px solid rgba(156, 175, 136, 0.25);
    color: var(--accent-cyan);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 100px;
    margin-bottom: 12px;
}

.case-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.case-content > p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.case-metrics {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.metric-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.metric-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ==========================
   TRAINING SECTION
   ========================== */
.training {
    background: var(--bg-secondary);
}

.training-gallery {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-auto-rows: 260px;
    gap: 24px;
    margin-top: 48px;
}

.training-item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    cursor: pointer;
    min-height: 260px;
}

.training-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

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

.training-item span {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 16px;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    color: white;
    font-weight: 500;
    font-size: 0.95rem;
}

.training-item.visible {
    opacity: 1 !important;
    transform: none !important;
}

/* ==========================
   INSTRUCTORS SECTION
   ========================== */
.instructors {
    background: var(--bg-primary);
}

.instructors-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.instructor-card {
    display: block;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all var(--transition-normal);
    text-decoration: none;
    color: inherit;
}

.instructor-card:hover {
    border-color: var(--accent-purple);
    transform: translateY(-6px);
    box-shadow: var(--shadow-glow);
}

.instructor-header {
    display: flex;
    gap: 20px;
    margin-bottom: 24px;
    align-items: flex-start;
}

.instructor-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
    border: 2px solid var(--border-color);
}

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

.instructor-info h3 {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.instructor-title {
    color: var(--accent-blue);
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.instructor-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.instructor-tags span {
    font-size: 0.75rem;
    padding: 4px 10px;
    background: rgba(56, 189, 248, 0.1);
    border-radius: 20px;
    color: var(--accent-blue);
}

.instructor-courses h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.instructor-courses ul {
    list-style: none;
}

.instructor-courses li {
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

.instructor-courses li:last-child {
    border-bottom: none;
}

/* ==========================
   PARTNERS SECTION
   ========================== */
.partners {
    background: var(--bg-primary);
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.partner-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    height: 130px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
}

.partner-card:hover {
    border-color: var(--accent-purple);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.partner-card img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    display: block;
}

.partner-feishu img {
    transform: scale(0.5);
}

.partner-aliyun img {
    transform: scale(1.35);
}

/* ==========================
   CERTIFICATES SECTION
   ========================== */
.certificates {
    background: var(--bg-secondary);
}

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

.certificate-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
}

.certificate-card:hover {
    border-color: var(--accent-purple);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.certificate-image {
    overflow: hidden;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.certificate-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* ==========================
   CONTACT SECTION
   ========================== */
.contact-combined {
    width: 100%;
}

.contact-combined-card {
    display: grid;
    grid-template-columns: 1.6fr 1fr;
    gap: 40px;
    padding: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    align-items: center;
}

.contact-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 16px;
    min-height: 120px;
    padding: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
}

.contact-card:hover {
    border-color: var(--accent-purple);
    transform: translateX(8px);
}

.contact-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(122, 158, 159, 0.12);
    border-radius: var(--radius-md);
    color: var(--accent-blue);
    flex-shrink: 0;
}

.contact-icon svg {
    width: 24px;
    height: 24px;
}

.contact-detail h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.contact-detail p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.contact-qr-section {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    gap: 24px;
}

.contact-qr-section h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.contact-qr {
    display: flex;
    justify-content: center;
    gap: 32px;
}

.contact-qr-item {
    text-align: center;
}

.contact-qr-item p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.contact-qr-item img {
    width: 140px;
    height: 140px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    display: inline-block;
}

.office-gallery {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 48px;
}

.office-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    aspect-ratio: 4 / 3;
}

.office-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform var(--transition-normal);
}

.office-card:hover img {
    transform: scale(1.05);
}

.office-card span {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 12px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.6));
    color: #fff;
    font-size: 0.85rem;
    font-weight: 500;
}

/* ==========================
   FOOTER
   ========================== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.footer-logo-img {
    width: 52px;
    height: 52px;
    object-fit: contain;
    transform: translateY(-6px);
}

.footer-logo span {
    font-size: 1.35rem;
    font-weight: 700;
    line-height: 1;
}

.footer-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.7;
    max-width: 300px;
}

.footer-links h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    font-size: 0.9rem;
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--accent-blue);
}

.footer-bottom {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-copyright {
    margin: 0;
}

.footer-meta {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 8px 48px;
}

.footer-meta a {
    font-size: 0.85rem;
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

.footer-meta a:hover {
    color: var(--accent-blue);
}

/* ==========================
   ANIMATIONS
   ========================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(1.2);
    }
}

@keyframes scrollLine {
    0% {
        transform: scaleY(0);
        transform-origin: top;
    }
    50% {
        transform: scaleY(1);
        transform-origin: top;
    }
    51% {
        transform-origin: bottom;
    }
    100% {
        transform: scaleY(0);
        transform-origin: bottom;
    }
}

/* Scroll Reveal Animation */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }
.reveal-delay-6 { transition-delay: 0.6s; }

/* ==========================
   RESPONSIVE DESIGN
   ========================== */
@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .services-grid,
    .scenarios-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cases-grid,
    .training-gallery,
    .instructors-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .certificates-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-combined-card {
        grid-template-columns: 1fr;
    }
    
    .office-gallery {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .nav-container {
        padding: 0 16px;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-header {
        margin-bottom: 36px;
    }
    
    .section-tag {
        font-size: 0.9rem;
        padding: 6px 18px;
        margin-bottom: 16px;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .hero {
        padding: 100px 16px 60px;
    }
    
    .hero-badge {
        font-size: 0.85rem;
        padding: 6px 14px;
        max-width: 100%;
        flex-wrap: wrap;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
        max-width: 100%;
    }
    
    .hero-subtitle br {
        display: none;
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
        max-width: 100%;
    }
    
    .stat-item {
        padding: 16px 10px;
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    .stat-label {
        font-size: 0.75rem;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: rgba(245, 241, 235, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        gap: 24px;
        transform: translateX(100%);
        transition: transform var(--transition-normal);
    }
    
    .nav-menu .nav-link {
        color: var(--text-primary);
        font-size: 1.4rem;
    }
    
    .nav-menu.active {
        transform: translateX(0);
    }
    
    .nav-link {
        font-size: 1.2rem;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .nav-cta {
        display: none;
    }
    
    .about-grid,
    .services-grid,
    .scenarios-grid,
    .team-grid,
    .cases-grid,
    .products-grid,
    .partners-grid,
    .certificates-grid,
    .training-gallery,
    .instructors-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .instructor-card {
        padding: 24px;
    }
    
    .service-card,
    .scenario-card {
        padding: 24px 20px;
    }
    
    .product-card {
        padding: 28px 20px;
    }
    
    .product-featured {
        grid-column: span 1;
        flex-direction: column;
        gap: 20px;
        padding: 28px 20px;
    }
    
    .product-header {
        gap: 14px;
    }
    
    .product-icon {
        width: 52px;
        height: 52px;
    }
    
    .product-icon svg {
        width: 26px;
        height: 26px;
    }
    
    .product-featured .product-icon {
        width: 60px;
        height: 60px;
    }
    
    .product-featured .product-icon svg {
        width: 30px;
        height: 30px;
    }
    
    .product-featured h3 {
        font-size: 1.4rem;
    }
    
    .product-card h3 {
        font-size: 1.15rem;
    }
    
    .partner-card {
        height: 100px;
        padding: 16px;
    }
    
    .team-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 22px;
        gap: 16px;
    }
    
    .team-avatar img {
        width: 64px;
        height: 64px;
    }
    
    .team-title-row {
        justify-content: center;
    }
    
    .case-image {
        height: 160px;
    }
    
    .case-content {
        padding: 22px;
    }
    
    .contact-card {
        padding: 18px;
        gap: 12px;
    }
    
    .contact-card:hover {
        transform: none;
    }
    
    .contact-combined-card {
        padding: 24px;
        gap: 32px;
    }

    .contact-details {
        grid-template-columns: 1fr;
    }

    .contact-qr {
        flex-direction: column;
        align-items: center;
        gap: 24px;
    }
    
    .office-gallery {
        grid-template-columns: 1fr;
        gap: 12px;
        margin-top: 32px;
    }
    
    .footer {
        padding: 48px 0 20px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
        margin-bottom: 32px;
    }

    .footer-brand {
        grid-column: 1 / -1;
    }
    
    .footer-desc {
        max-width: 100%;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 10px;
    }
    
    .footer-meta {
        flex-direction: column;
        gap: 6px;
    }
    
    .hero-cta-group {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.6rem;
    }
    
    .hero-subtitle {
        font-size: 0.9rem;
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    
    .stat-item {
        padding: 14px 8px;
    }
    
    .stat-number {
        font-size: 1.3rem;
    }
    
    .stat-label {
        font-size: 0.7rem;
    }
    
    .section {
        padding: 48px 0;
    }
    
    .section-title {
        font-size: 1.35rem;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 0.9rem;
    }
    
    .partner-card {
        height: 90px;
    }
    
    .case-image {
        height: 140px;
    }
    
    .service-num {
        font-size: 2rem;
    }
}

/* ==========================
   MENTOR DETAIL PAGES
   ========================== */

.mentor-hero {
    padding: 140px 0 60px;
    background: linear-gradient(135deg, rgba(142, 158, 171, 0.1) 0%, rgba(122, 158, 159, 0.08) 50%, rgba(156, 175, 136, 0.06) 100%);
    border-bottom: 1px solid var(--border-color);
}

.mentor-hero-container {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 48px;
    align-items: start;
}

.mentor-avatar-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.mentor-avatar-lg {
    width: 240px;
    height: 320px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(142, 158, 171, 0.25) 0%, rgba(122, 158, 159, 0.25) 50%, rgba(156, 175, 136, 0.25) 100%);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    box-shadow: var(--shadow-card);
}

.mentor-avatar-lg .avatar-placeholder {
    width: 120px;
    height: 120px;
    font-size: 3rem;
}

.mentor-avatar-lg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
}

.mentor-info-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.mentor-name {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.mentor-role {
    font-size: 1.1rem;
    color: var(--accent-cyan);
    font-weight: 500;
    margin-bottom: 8px;
}

.mentor-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 8px;
}

.mentor-badges span {
    font-size: 0.8rem;
    color: var(--text-secondary);
    padding: 4px 12px;
    background: rgba(0, 0, 0, 0.04);
    border: 1px solid var(--border-color);
    border-radius: 100px;
}

.mentor-one-liner {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 680px;
}

.mentor-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-top: 8px;
}

.mentor-stat {
    padding: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    text-align: center;
}

.mentor-stat-number {
    display: block;
    font-size: 1.6rem;
    font-weight: 700;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.mentor-stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.mentor-actions {
    display: flex;
    gap: 16px;
    margin-top: 8px;
}

.mentor-actions .btn {
    padding: 12px 28px;
    font-size: 0.95rem;
}

/* Tabs */
.mentor-content {
    padding: 48px 0 80px;
}

.tabs {
    margin-bottom: 40px;
}

.tab-list {
    display: flex;
    gap: 8px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0;
}

.tab-item {
    padding: 14px 24px;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-bottom: -1px;
}

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

.tab-item.active {
    color: var(--accent-blue);
    border-bottom-color: var(--accent-blue);
}

.tab-panel {
    display: none;
    animation: fadeIn 0.4s ease;
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Mentor Intro */
.intro-section {
    margin-bottom: 40px;
}

.intro-section:last-child {
    margin-bottom: 0;
}

.intro-section h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 20px;
    padding-left: 14px;
    border-left: 3px solid var(--accent-purple);
}

.intro-section p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.intro-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.intro-list li {
    color: var(--text-secondary);
    padding-left: 20px;
    position: relative;
    line-height: 1.7;
}

.intro-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-blue);
}

.timeline {
    position: relative;
    padding-left: 24px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 5px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    padding-bottom: 24px;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -23px;
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--bg-primary);
    border: 2px solid var(--accent-blue);
}

.timeline-title {
    font-weight: 600;
    margin-bottom: 4px;
}

.timeline-period {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.timeline-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* Course Catalog */
.course-catalog {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.course-module {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.course-module-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    background: rgba(0, 0, 0, 0.02);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.course-module-header:hover {
    background: rgba(0, 0, 0, 0.04);
}

.course-module-title {
    font-size: 1.1rem;
    font-weight: 600;
}

.course-module-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.course-module-toggle {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-fast);
}

.course-module.open .course-module-toggle {
    transform: rotate(180deg);
}

.course-module-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

.course-module.open .course-module-body {
    max-height: 2000px;
}

.course-lesson {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    transition: background var(--transition-fast);
}

.course-lesson:hover {
    background: rgba(0, 0, 0, 0.02);
}

.course-lesson-info {
    display: flex;
    align-items: center;
    gap: 14px;
}

.course-lesson-number {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(122, 158, 159, 0.12);
    border: 1px solid rgba(122, 158, 159, 0.25);
    border-radius: 50%;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-blue);
    flex-shrink: 0;
}

.course-lesson-title {
    font-size: 0.95rem;
    color: var(--text-primary);
}

.course-lesson-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    flex-shrink: 0;
}

/* Projects */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    border-color: var(--accent-purple);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.project-card-image {
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--bg-secondary);
}

.project-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform var(--transition-normal);
}

.project-card:hover .project-card-image img {
    transform: scale(1.05);
}

.project-card-body {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.project-card h4 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 12px;
    line-height: 1.4;
}

.project-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 16px;
}

.project-result {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--accent-cyan);
    padding: 10px 14px;
    background: rgba(156, 175, 136, 0.12);
    border-radius: var(--radius-sm);
    margin-top: auto;
}

.project-links {
    margin-top: 12px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.project-links a {
    display: inline-block;
    padding: 6px 12px;
    background: rgba(122, 158, 159, 0.12);
    color: var(--accent-blue);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    text-decoration: none;
    transition: background var(--transition-fast);
}

.project-links a:hover {
    background: rgba(122, 158, 159, 0.24);
}

/* Project Modules (Accordion style for 授课案例) */
.project-modules {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.project-module {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.project-module-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 24px;
    background: rgba(0, 0, 0, 0.02);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.project-module-header:hover {
    background: rgba(0, 0, 0, 0.04);
}

.project-module-title {
    font-size: 1.1rem;
    font-weight: 600;
    line-height: 1.4;
}

.project-module-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    color: var(--text-muted);
    font-size: 0.85rem;
    flex-shrink: 0;
}

.project-module-toggle {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-fast);
}

.project-module.open .project-module-toggle {
    transform: rotate(180deg);
}

.project-module-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

.project-module.open .project-module-body {
    max-height: 1200px;
}

.project-module-content {
    padding: 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.project-module-gallery {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

/* 只有一张照片时：自然比例显示，不强制裁剪 */
.project-module-gallery:has(.project-module-thumb:only-child) {
    display: block;
    text-align: center;
}

.project-module-thumb:only-child {
    display: inline-block;
    width: 100%;
    max-width: 640px;
    vertical-align: top;
    aspect-ratio: unset;
}

.project-module-thumb:only-child img {
    width: 100%;
    height: auto;
    object-fit: contain;
    border-radius: var(--radius-md);
    display: block;
}

.project-module-thumb {
    aspect-ratio: 4 / 3;
    overflow: hidden;
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
}

.project-module-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform var(--transition-normal);
}

.project-module-thumb:hover img {
    transform: scale(1.05);
}

.project-module-text p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 16px;
}

.project-module-text .project-result {
    margin-top: 0;
}

@media (max-width: 1024px) {
    .project-module-gallery {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .project-module-gallery {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Back to team link */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 24px;
    transition: color var(--transition-fast);
}

.back-link:hover {
    color: var(--accent-blue);
}

/* Responsive for mentor detail */
@media (max-width: 1024px) {
    .mentor-hero-container {
        grid-template-columns: 220px 1fr;
        gap: 32px;
    }
    
    .mentor-avatar-lg {
        width: 200px;
        height: 260px;
    }
    
    .mentor-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .mentor-hero {
        padding: 120px 0 40px;
    }
    
    .mentor-hero-container {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .mentor-avatar-section {
        align-items: flex-start;
    }
    
    .mentor-avatar-lg {
        width: 160px;
        height: 210px;
    }
    
    .mentor-name {
        font-size: 2rem;
    }
    
    .mentor-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tab-list {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }
    
    .tab-list::-webkit-scrollbar {
        display: none;
    }
    
    .tab-item {
        flex-shrink: 0;
        padding: 12px 18px;
        font-size: 0.95rem;
    }
    
    .intro-list {
        grid-template-columns: 1fr;
    }
    
    .course-module-header {
        padding: 16px 20px;
    }
    
    .course-lesson {
        padding: 14px 20px;
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    
    .mentor-actions {
        flex-direction: column;
    }
    
    .mentor-actions .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .mentor-avatar-lg {
        width: 140px;
        height: 180px;
    }
    
    .mentor-name {
        font-size: 1.7rem;
    }
    
    .mentor-stats {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }
    
    .mentor-stat {
        padding: 12px;
    }
    
    .mentor-stat-number {
        font-size: 1.3rem;
    }
}

/* ==========================
   NEWS SECTION
   ========================== */
.news-slider {
    position: relative;
    padding: 0 60px;
}

.news-track-wrapper {
    overflow: hidden;
    margin: 0 -12px;
}

.news-track {
    display: flex;
    transition: transform var(--transition-normal);
    will-change: transform;
}

.news-card {
    flex: 0 0 calc(33.333% - 24px);
    margin: 0 12px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.news-card:hover {
    border-color: var(--accent-purple);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.news-link {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.news-image {
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--bg-secondary);
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
    display: block;
    transition: transform var(--transition-normal);
}

.news-card:hover .news-image img {
    transform: scale(1.05);
}

.news-body {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.news-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.news-category {
    padding: 4px 10px;
    background: rgba(122, 158, 159, 0.12);
    border-radius: 100px;
    color: var(--accent-blue);
    font-size: 0.8rem;
}

.news-title {
    font-size: 1.1rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.news-excerpt {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 16px;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-more {
    color: var(--accent-blue);
    font-size: 0.9rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: gap var(--transition-fast);
}

.news-card:hover .news-more {
    gap: 8px;
}

.news-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    z-index: 10;
}

.news-nav:hover {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: white;
}

.news-nav:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.news-prev {
    left: 0;
}

.news-next {
    right: 0;
}

.news-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 32px;
}

.news-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: none;
    background: var(--border-color);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.news-dot.active {
    background: var(--accent-blue);
    width: 24px;
    border-radius: 4px;
}

@media (max-width: 1024px) {
    .news-card {
        flex: 0 0 calc(50% - 24px);
    }
}

@media (max-width: 768px) {
    .news-slider {
        padding: 0 0 60px;
    }

    .news-card {
        flex: 0 0 calc(100% - 24px);
    }

    .news-nav {
        top: auto;
        bottom: 0;
        transform: none;
    }

    .news-prev {
        left: calc(50% - 56px);
    }

    .news-next {
        right: calc(50% - 56px);
    }
}

/* ==========================
   NEWS DETAIL PAGE
   ========================== */
.news-detail-hero {
    padding: 140px 0 60px;
    background: var(--bg-secondary);
}

.news-detail-hero .back-link {
    margin-bottom: 24px;
}

.news-detail-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.news-detail-category {
    padding: 4px 12px;
    background: rgba(122, 158, 159, 0.12);
    border-radius: 100px;
    color: var(--accent-blue);
}

.news-detail-title {
    font-size: 2.2rem;
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-primary);
}

.news-detail-content {
    padding: 80px 0 120px;
}

.news-detail-main {
    max-width: 800px;
    margin: 0 auto;
}

.news-detail-image {
    width: 100%;
    aspect-ratio: 16 / 9;
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 40px;
    background: var(--bg-secondary);
}

.news-detail-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.news-detail-body {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.news-detail-body p {
    margin-bottom: 24px;
}

.news-detail-source {
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

.news-detail-source h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.news-detail-source p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 12px;
}

.news-detail-source a {
    color: var(--accent-blue);
    font-size: 0.95rem;
    text-decoration: underline;
    transition: color var(--transition-fast);
}

.news-detail-source a:hover {
    color: var(--accent-purple);
}

@media (max-width: 768px) {
    .news-detail-hero {
        padding: 120px 0 40px;
    }
    
    .news-detail-title {
        font-size: 1.7rem;
    }
    
    .news-detail-content {
        padding: 60px 0 80px;
    }
    
    .news-detail-image {
        margin-bottom: 32px;
    }
}