/* ============================================
   科服咨询 V1.0 — Premium Stylesheet
   Brand: Deep Blue #1A3A5C + Gold #C9A84C
   ============================================ */

/* ===== CSS Variables / Theming ===== */
:root {
    /* Brand Colors */
    --brand-blue: #1A3A5C;
    --brand-blue-light: #2A5A8C;
    --brand-blue-dark: #0F2A44;
    --brand-gold: #C9A84C;
    --brand-gold-light: #D4B85E;
    --brand-gold-dark: #A88B30;

    /* Light Theme */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F7F9FC;
    --bg-tertiary: #EEF2F7;
    --bg-card: #FFFFFF;
    --bg-overlay: rgba(255, 255, 255, 0.7);
    --bg-nav: rgba(255, 255, 255, 0.85);

    --text-primary: #1A2332;
    --text-secondary: #4A5868;
    --text-tertiary: #8896A6;
    --text-inverse: #FFFFFF;

    --border-color: rgba(26, 58, 92, 0.1);
    --border-strong: rgba(26, 58, 92, 0.2);

    --shadow-sm: 0 2px 8px rgba(26, 58, 92, 0.06);
    --shadow-md: 0 4px 20px rgba(26, 58, 92, 0.08);
    --shadow-lg: 0 8px 40px rgba(26, 58, 92, 0.12);
    --shadow-xl: 0 20px 60px rgba(26, 58, 92, 0.15);

    --gradient-primary: linear-gradient(135deg, #1A3A5C 0%, #2A5A8C 100%);
    --gradient-gold: linear-gradient(135deg, #C9A84C 0%, #D4B85E 100%);
    --gradient-hero: linear-gradient(160deg, #0F2A44 0%, #1A3A5C 40%, #2A5A8C 100%);

    /* Typography */
    --font-serif: 'Noto Serif SC', 'Songti SC', serif;
    --font-sans: 'Noto Sans SC', -apple-system, 'PingFang SC', sans-serif;

    /* Spacing */
    --section-padding: 100px 0;
    --container-max: 1200px;
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;

    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-magnetic: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="dark"] {
    --bg-primary: #0D1620;
    --bg-secondary: #131F2E;
    --bg-tertiary: #1A2838;
    --bg-card: #15212F;
    --bg-overlay: rgba(13, 22, 32, 0.7);
    --bg-nav: rgba(13, 22, 32, 0.85);

    --text-primary: #E8EEF5;
    --text-secondary: #A8B8C8;
    --text-tertiary: #687888;
    --text-inverse: #0D1620;

    --border-color: rgba(201, 168, 76, 0.1);
    --border-strong: rgba(201, 168, 76, 0.2);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.5);

    --gradient-hero: linear-gradient(160deg, #050B12 0%, #0D1620 40%, #131F2E 100%);
}

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

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

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    transition: background var(--transition-base), color var(--transition-base);
}

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

ul { list-style: none; }

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

/* ===== Container ===== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Section ===== */
.section {
    padding: var(--section-padding);
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 3px;
    color: var(--brand-gold);
    text-transform: uppercase;
    margin-bottom: 12px;
    position: relative;
    padding: 0 20px;
}

.section-tag::before,
.section-tag::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 30px;
    height: 1px;
    background: var(--brand-gold);
    opacity: 0.5;
}

.section-tag::before { left: -20px; }
.section-tag::after { right: -20px; }

.section-title {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
    letter-spacing: 2px;
}

.section-desc {
    font-size: 1.05rem;
    color: var(--text-tertiary);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-gold);
    color: var(--brand-blue-dark);
    box-shadow: 0 4px 14px rgba(201, 168, 76, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(201, 168, 76, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--text-inverse);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-lg {
    padding: 16px 36px;
    font-size: 1.05rem;
}

.btn-block { width: 100%; }

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--bg-nav);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-base);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--brand-blue);
    transition: transform var(--transition-magnetic);
}

[data-theme="dark"] .nav-logo {
    color: var(--brand-gold);
}

.nav-logo:hover { transform: scale(1.03); }

.logo-icon {
    display: flex;
    align-items: center;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-cn {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: 2px;
}

.logo-en {
    font-size: 0.65rem;
    letter-spacing: 2px;
    color: var(--text-tertiary);
    font-weight: 500;
}

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

.nav-link {
    padding: 8px 16px;
    font-size: 0.95rem;
    font-weight: 400;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    position: relative;
    transition: all var(--transition-fast);
}

.nav-link:hover {
    color: var(--brand-blue);
    background: var(--bg-tertiary);
}

[data-theme="dark"] .nav-link:hover {
    color: var(--brand-gold);
}

.nav-link.active {
    color: var(--brand-blue);
    font-weight: 500;
}

[data-theme="dark"] .nav-link.active {
    color: var(--brand-gold);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--brand-gold);
    border-radius: 1px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.theme-toggle {
    background: var(--bg-tertiary);
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition-base);
}

.theme-toggle:hover {
    background: var(--brand-gold);
    color: var(--brand-blue-dark);
    transform: rotate(180deg);
}

.icon-sun { display: none; }
.icon-moon { display: block; }
[data-theme="dark"] .icon-sun { display: block; }
[data-theme="dark"] .icon-moon { display: none; }

.nav-cta {
    padding: 8px 20px;
    font-size: 0.9rem;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 1px;
    transition: all var(--transition-base);
}

.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ===== Hero ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: var(--gradient-hero);
    padding-top: 72px;
}

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

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(201, 168, 76, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(201, 168, 76, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float 8s ease-in-out infinite;
}

.hero-orb-1 {
    width: 500px;
    height: 500px;
    background: var(--brand-blue-light);
    top: -100px;
    right: -100px;
}

.hero-orb-2 {
    width: 400px;
    height: 400px;
    background: var(--brand-gold);
    bottom: -100px;
    left: -100px;
    animation-delay: -4s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(30px, -30px); }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    padding: 0 24px;
    animation: heroFadeIn 1s var(--transition-slow);
}

@keyframes heroFadeIn {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(201, 168, 76, 0.1);
    border: 1px solid rgba(201, 168, 76, 0.3);
    border-radius: 100px;
    font-size: 0.85rem;
    color: var(--brand-gold-light);
    margin-bottom: 32px;
}

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

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

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2.2rem, 5vw, 3.8rem);
    font-weight: 900;
    color: #FFFFFF;
    line-height: 1.3;
    margin-bottom: 24px;
    letter-spacing: 3px;
}

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

.hero-subtitle {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 48px;
    line-height: 1.8;
}

.hero-br { display: inline; }

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

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

.stat-number {
    display: block;
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--brand-gold);
    line-height: 1;
}

.stat-label {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 8px;
    display: block;
}

.stat-divider {
    width: 1px;
    height: 50px;
    background: rgba(255, 255, 255, 0.15);
}

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

.hero-scroll {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.75rem;
    letter-spacing: 2px;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, rgba(255,255,255,0.4), transparent);
    animation: scrollDown 2s infinite;
}

@keyframes scrollDown {
    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; }
}

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

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: start;
}

.about-intro h3,
.about-culture h3 {
    font-family: var(--font-serif);
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--brand-gold);
    display: inline-block;
}

.about-intro p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.9;
}

.about-intro strong {
    color: var(--brand-blue);
    font-weight: 500;
}

[data-theme="dark"] .about-intro strong {
    color: var(--brand-gold-light);
}

.about-highlights {
    display: flex;
    gap: 24px;
    margin-top: 32px;
    flex-wrap: wrap;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.highlight-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--brand-gold);
}

.highlight-icon {
    color: var(--brand-gold);
    display: flex;
}

.highlight-item span {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
}

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

.culture-card {
    padding: 28px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.culture-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-gold);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.culture-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

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

.culture-icon {
    color: var(--brand-gold);
    display: flex;
    justify-content: center;
    margin-bottom: 16px;
}

.culture-card h4 {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

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

/* ===== Services Section ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-bottom: 60px;
}

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 36px;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-gold);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-slow);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--brand-gold);
}

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

.service-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 16px;
}

.service-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--brand-blue);
    transition: all var(--transition-base);
    flex-shrink: 0;
}

[data-theme="dark"] .service-icon {
    color: var(--brand-gold);
    background: rgba(201, 168, 76, 0.1);
}

.service-card:hover .service-icon {
    background: var(--gradient-gold);
    color: var(--brand-blue-dark);
    transform: scale(1.05);
}

.service-header h3 {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-primary);
}

.service-summary {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.8;
}

.service-details {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.service-card.expanded .service-details {
    max-height: 800px;
}

.detail-group {
    margin-bottom: 20px;
}

.detail-group h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--brand-gold);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.detail-group ul {
    padding-left: 0;
}

.detail-group li {
    font-size: 0.9rem;
    color: var(--text-secondary);
    padding: 6px 0 6px 20px;
    position: relative;
    line-height: 1.7;
}

.detail-group li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 14px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--brand-gold);
    opacity: 0.6;
}

.detail-group strong {
    color: var(--text-primary);
    font-weight: 500;
}

.service-toggle {
    background: none;
    border: 1px solid var(--border-strong);
    color: var(--brand-blue);
    padding: 8px 20px;
    border-radius: 100px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-top: 8px;
}

[data-theme="dark"] .service-toggle {
    color: var(--brand-gold);
}

.service-toggle:hover {
    background: var(--brand-blue);
    color: #FFFFFF;
    border-color: var(--brand-blue);
}

[data-theme="dark"] .service-toggle:hover {
    background: var(--brand-gold);
    color: var(--brand-blue-dark);
    border-color: var(--brand-gold);
}

.service-card.expanded .service-toggle::after {
    content: ' ↑';
}

.service-card:not(.expanded) .service-toggle::after {
    content: ' ↓';
}

/* Service Advantages */
.service-advantages {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 48px;
    box-shadow: var(--shadow-md);
}

.advantages-title {
    text-align: center;
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 36px;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.advantage-item {
    text-align: center;
    transition: transform var(--transition-base);
}

.advantage-item:hover { transform: translateY(-4px); }

.advantage-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--brand-gold);
    transition: all var(--transition-base);
}

.advantage-item:hover .advantage-icon {
    background: var(--gradient-gold);
    color: var(--brand-blue-dark);
    transform: scale(1.1);
}

.advantage-item h4 {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.advantage-item p {
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

/* ===== Process Section ===== */
.process { background: var(--bg-secondary); }

.process-timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.process-line {
    position: absolute;
    top: 30px;
    left: 10%;
    right: 10%;
    height: 2px;
    background: linear-gradient(to right, var(--brand-gold), var(--brand-blue-light), var(--brand-gold));
    opacity: 0.3;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 16px;
    position: relative;
}

.process-step {
    text-align: center;
    position: relative;
}

.step-number {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 2px solid var(--border-strong);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--brand-blue);
    transition: all var(--transition-base);
    position: relative;
    z-index: 1;
}

[data-theme="dark"] .step-number {
    color: var(--brand-gold);
    background: var(--bg-card);
}

.process-step:hover .step-number {
    background: var(--gradient-gold);
    color: var(--brand-blue-dark);
    border-color: var(--brand-gold);
    transform: scale(1.1);
    box-shadow: 0 0 20px rgba(201, 168, 76, 0.3);
}

.step-content h4 {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.step-content p {
    font-size: 0.82rem;
    color: var(--text-tertiary);
    line-height: 1.5;
}

/* ===== Cases Section ===== */
.cases-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.case-tab {
    padding: 10px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 100px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.case-tab:hover {
    border-color: var(--brand-gold);
    color: var(--brand-gold);
}

.case-tab.active {
    background: var(--gradient-gold);
    color: var(--brand-blue-dark);
    border-color: var(--brand-gold);
    box-shadow: 0 4px 14px rgba(201, 168, 76, 0.3);
}

.case-panel {
    display: none;
    animation: fadeIn 0.5s ease;
}

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

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

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

.case-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 28px;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.case-card-wide {
    grid-column: span 3;
}

.case-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: var(--brand-gold);
}

.case-tag {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(201, 168, 76, 0.1);
    color: var(--brand-gold);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 500;
    margin-bottom: 12px;
}

.case-card h4 {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.case-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.case-card strong {
    color: var(--brand-gold);
    font-weight: 600;
}

/* International Cases */
.case-international {
    max-width: 800px;
    margin: 0 auto;
}

.intl-section {
    margin-bottom: 32px;
}

.intl-section h4 {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    text-align: center;
}

.intl-countries {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.country-chip {
    padding: 8px 18px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 100px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    cursor: default;
}

.country-chip:hover {
    background: var(--gradient-gold);
    color: var(--brand-blue-dark);
    border-color: var(--brand-gold);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(201, 168, 76, 0.2);
}

.intl-note {
    text-align: center;
    font-size: 0.95rem;
    color: var(--text-tertiary);
    margin-top: 24px;
    padding: 16px 24px;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

/* ===== Partners Section ===== */
.partners { background: var(--bg-secondary); }

.partners-marquee {
    overflow: hidden;
    margin-bottom: 48px;
    -webkit-mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
    mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
}

.partners-track {
    display: flex;
    gap: 20px;
    animation: marquee 30s linear infinite;
    width: max-content;
}

@keyframes marquee {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
}

.partner-logo {
    padding: 16px 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
    transition: all var(--transition-fast);
    cursor: default;
}

.partner-logo:hover {
    color: var(--brand-gold);
    border-color: var(--brand-gold);
    box-shadow: var(--shadow-sm);
}

.qualifications {
    display: flex;
    justify-content: center;
    gap: 60px;
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
}

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

.qual-icon {
    color: var(--brand-gold);
    display: flex;
    justify-content: center;
    margin-bottom: 12px;
    opacity: 0.7;
}

.qual-item span {
    font-size: 0.9rem;
    color: var(--text-tertiary);
}

/* ===== Contact Section ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 48px;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    gap: 16px;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.contact-item:hover {
    transform: translateX(4px);
    border-color: var(--brand-gold);
    box-shadow: var(--shadow-sm);
}

.contact-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--brand-gold);
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

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

.contact-form-wrapper {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-lg);
}

.contact-form h3 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-desc {
    font-size: 0.9rem;
    color: var(--text-tertiary);
    margin-bottom: 28px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.required { color: #E74C3C; }

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    color: var(--text-primary);
    transition: all var(--transition-fast);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--brand-gold);
    box-shadow: 0 0 0 3px rgba(201, 168, 76, 0.1);
}

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

.form-notice {
    margin-top: 16px;
    text-align: center;
    font-size: 0.9rem;
    min-height: 24px;
}

.form-notice.success { color: #27AE60; }
.form-notice.error { color: #E74C3C; }

/* ===== Footer ===== */
.footer {
    background: var(--brand-blue-dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 64px 0 24px;
}

[data-theme="dark"] .footer {
    background: #050B12;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--brand-gold);
    margin-bottom: 16px;
}

.footer-desc {
    font-size: 0.9rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.5);
}

.footer-links h4,
.footer-contact h4 {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 600;
    color: #FFFFFF;
    margin-bottom: 16px;
}

.footer-links ul { display: flex; flex-direction: column; gap: 10px; }

.footer-links a {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.5);
    transition: color var(--transition-fast);
}

.footer-links a:hover { color: var(--brand-gold); }

.footer-contact p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 8px;
}

.footer-qual {
    margin-top: 12px;
    padding: 12px;
    background: rgba(201, 168, 76, 0.1);
    border: 1px solid rgba(201, 168, 76, 0.2);
    border-radius: var(--radius-sm);
}

.footer-qual p {
    font-size: 0.8rem;
    color: rgba(201, 168, 76, 0.8);
    margin: 0;
}

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.4);
    margin-bottom: 4px;
}

.footer-icp { font-size: 0.75rem !important; }

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-gold);
    color: var(--brand-blue-dark);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

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

.reveal.visible {
    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; }

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .services-grid { grid-template-columns: 1fr; }
    .advantages-grid { grid-template-columns: repeat(2, 1fr); }
    .process-steps { grid-template-columns: repeat(3, 1fr); gap: 30px; }
    .process-line { display: none; }
    .case-grid { grid-template-columns: repeat(2, 1fr); }
    .case-card-wide { grid-column: span 2; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
}

@media (max-width: 768px) {
    :root { --section-padding: 60px 0; }

    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--bg-nav);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px;
        gap: 4px;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
        border-bottom: 1px solid var(--border-color);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-link { width: 100%; padding: 12px 16px; }
    .nav-toggle { display: flex; }
    .nav-cta { display: none; }

    .section-title { font-size: 1.8rem; }
    .hero-title { font-size: 1.8rem; letter-spacing: 1px; }
    .hero-subtitle { font-size: 0.95rem; }
    .hero-br { display: none; }

    .hero-stats { gap: 12px; }
    .stat-number { font-size: 1.6rem; }
    .stat-label { font-size: 0.7rem; }
    .stat-divider { height: 30px; }

    .culture-grid { grid-template-columns: 1fr; }
    .advantages-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
    .process-steps { grid-template-columns: 1fr 1fr; }
    .case-grid { grid-template-columns: 1fr; }
    .case-card-wide { grid-column: span 1; }

    .contact-form-wrapper { padding: 24px; }
    .footer-grid { grid-template-columns: 1fr; }
    .qualifications { flex-direction: column; gap: 24px; }

    .service-advantages { padding: 24px; }
    .partners-marquee { padding: 0 10px; }
}

@media (max-width: 480px) {
    .hero-actions { flex-direction: column; width: 100%; }
    .hero-actions .btn { width: 100%; }
    .advantages-grid { grid-template-columns: 1fr; }
    .process-steps { grid-template-columns: 1fr; }
    .hero-stats { flex-direction: column; gap: 16px; }
    .stat-divider { width: 40px; height: 1px; }
}

/* ===== Print ===== */
@media print {
    .navbar, .back-to-top, .hero-scroll, .nav-toggle { display: none; }
    .hero { min-height: auto; padding: 40px 0; }
}