/* ============================================
   讯飞听见 - 主样式表 (SEO Optimized)
   ============================================ */

/* --- CSS Variables / Design Tokens --- */
:root {
    --color-primary: #1677ff;
    --color-primary-dark: #0958d9;
    --color-primary-light: #e6f4ff;
    --color-secondary: #52c41a;
    --color-accent: #fa8c16;
    --color-text: #1f1f1f;
    --color-text-secondary: #666;
    --color-text-muted: #999;
    --color-bg: #ffffff;
    --color-bg-alt: #f5f7fa;
    --color-bg-dark: #141414;
    --color-border: #e8e8e8;
    --color-success: #52c41a;
    --color-warning: #faad14;
    --color-error: #ff4d4f;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    --font-mono: "SF Mono", "Fira Code", "Consolas", monospace;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --transition: 0.25s ease;
    --container-max: 1200px;
    --header-height: 72px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition);
}
a:hover {
    color: var(--color-primary-dark);
}

ul, ol {
    list-style: none;
}

/* --- Accessibility --- */
.skip-link {
    position: absolute;
    top: -100px;
    left: 16px;
    background: var(--color-primary);
    color: #fff;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    z-index: 10000;
    transition: top 0.3s;
}
.skip-link:focus {
    top: 8px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* --- Layout --- */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

.section-header {
    text-align: center;
    margin-bottom: 56px;
}
.section-header h2 {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 12px;
}
.section-subtitle {
    font-size: 18px;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.text-center { text-align: center; }
.alt-bg { background: var(--color-bg-alt); }

/* --- Header / Navigation --- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 22px;
    font-weight: 700;
    color: var(--color-text);
    text-decoration: none;
}
.logo-icon { font-size: 28px; }
.logo-text { letter-spacing: 1px; }

.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-link {
    display: block;
    padding: 8px 16px;
    color: var(--color-text-secondary);
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    white-space: nowrap;
}
.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
    background: var(--color-primary-light);
}

/* Dropdown */
.dropdown {
    position: relative;
}
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: #fff;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 160px;
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: all var(--transition);
    z-index: 100;
}
.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.dropdown-menu a {
    display: block;
    padding: 10px 20px;
    color: var(--color-text-secondary);
    font-size: 14px;
    transition: all var(--transition);
}
.dropdown-menu a:hover {
    background: var(--color-bg-alt);
    color: var(--color-primary);
}

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

/* Mobile Menu */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}
.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    position: relative;
    transition: all var(--transition);
}
.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition);
}
.hamburger::before { top: -7px; }
.hamburger::after { top: 7px; }

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--font-family);
    font-size: 15px;
    font-weight: 600;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    line-height: 1.4;
    white-space: nowrap;
}
.btn-primary {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}
.btn-primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: #fff;
}
.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}
.btn-outline:hover {
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
}
.btn-white {
    background: #fff;
    color: var(--color-primary);
    border-color: #fff;
}
.btn-white:hover {
    background: #f5f5f5;
}
.btn-sm { padding: 8px 18px; font-size: 14px; }
.btn-lg { padding: 16px 36px; font-size: 17px; border-radius: var(--radius-md); }
.btn-block { display: flex; width: 100%; }

/* --- Hero (首页) --- */
.hero {
    padding: 80px 0 100px;
    overflow: hidden;
}
.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content h1 {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 800;
    line-height: 1.2;
    color: var(--color-text);
    margin-bottom: 24px;
}
.hero-content h1 .highlight {
    color: var(--color-primary);
    display: block;
}

.hero-description {
    font-size: 18px;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 36px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}
.stat-item {
    text-align: center;
    padding: 16px 12px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
}
.stat-number {
    display: block;
    font-size: 28px;
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1.3;
}
.stat-label {
    display: block;
    font-size: 13px;
    color: var(--color-text-muted);
    margin-top: 4px;
}

/* Hero Visual */
.hero-visual {
    position: relative;
}

.visual-screen {
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
}
.screen-header {
    display: flex;
    gap: 8px;
    padding: 14px 18px;
    background: var(--color-bg-alt);
    border-bottom: 1px solid var(--color-border);
}
.screen-header .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}
.dot.red { background: #ff5f57; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #28c840; }
.screen-body {
    padding: 24px;
}

.waveform {
    display: flex;
    align-items: flex-end;
    gap: 4px;
    height: 80px;
    margin-bottom: 20px;
    padding: 0 8px;
}
.waveform span {
    flex: 1;
    background: var(--color-primary);
    opacity: 0.5;
    border-radius: 4px 4px 0 0;
    animation: wave 1.2s ease-in-out infinite alternate;
}
.waveform span:nth-child(even) { animation-delay: 0.3s; }
.waveform span:nth-child(3n) { animation-delay: 0.6s; }

@keyframes wave {
    from { opacity: 0.3; transform: scaleY(0.7); }
    to { opacity: 0.8; transform: scaleY(1); }
}

.transcript-preview {
    background: var(--color-bg-alt);
    border-radius: var(--radius-sm);
    padding: 16px;
}
.transcript-preview p {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: 8px;
}
.transcript-text {
    font-family: var(--font-mono);
    font-size: 13px !important;
    line-height: 1.8;
    border-left: 3px solid var(--color-primary);
    padding-left: 12px;
    color: var(--color-text) !important;
}

/* --- Features Grid --- */
.features {
    padding: 100px 0;
    background: var(--color-bg-alt);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.feature-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: all var(--transition);
}
.feature-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    border-color: var(--color-primary-light);
}
.feature-icon {
    font-size: 40px;
    margin-bottom: 20px;
}
.feature-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--color-text);
}
.feature-card p {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}
.feature-link {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-primary);
    transition: all var(--transition);
}
.feature-link:hover {
    color: var(--color-primary-dark);
}

/* --- Technology Section --- */
.technology {
    padding: 100px 0;
}
.tech-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}
.tech-item {
    display: flex;
    gap: 20px;
    padding: 32px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    transition: all var(--transition);
}
.tech-item:hover {
    box-shadow: var(--shadow-md);
}
.tech-number {
    font-size: 40px;
    font-weight: 800;
    color: var(--color-primary);
    opacity: 0.2;
    line-height: 1;
    flex-shrink: 0;
}
.tech-item h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}
.tech-item p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* --- Use Cases --- */
.use-cases {
    padding: 100px 0;
    background: var(--color-bg-alt);
}
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.case-card {
    background: #fff;
    border-radius: var(--radius-md);
    padding: 32px 24px;
    text-align: center;
    border: 1px solid var(--color-border);
    transition: all var(--transition);
}
.case-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}
.case-img-placeholder {
    font-size: 48px;
    margin-bottom: 16px;
}
.case-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
}
.case-card p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* --- Testimonials --- */
.testimonials {
    padding: 100px 0;
}
.testimonials-slider {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.testimonial-card {
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    padding: 36px 28px;
    border: 1px solid var(--color-border);
}
.testimonial-stars {
    color: var(--color-accent);
    font-size: 18px;
    margin-bottom: 16px;
}
.testimonial-text {
    font-size: 15px;
    color: var(--color-text);
    line-height: 1.8;
    margin-bottom: 20px;
    font-style: italic;
}
.testimonial-card footer cite {
    font-size: 14px;
    color: var(--color-text-secondary);
    font-weight: 600;
    font-style: normal;
}

/* --- CTA Section --- */
.cta-section {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #fff;
    text-align: center;
}
.cta-section h2 {
    font-size: clamp(28px, 4vw, 38px);
    font-weight: 700;
    margin-bottom: 12px;
}
.cta-section p {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 32px;
}
.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

/* --- Page Hero (内部页面) --- */
.page-hero {
    padding: 60px 0 40px;
    background: linear-gradient(180deg, var(--color-primary-light) 0%, #fff 100%);
    text-align: center;
}
.page-hero h1 {
    font-size: clamp(30px, 4vw, 44px);
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 12px;
}
.page-hero-subtitle {
    font-size: 18px;
    color: var(--color-text-secondary);
}

/* --- Product Detail --- */
.product-detail {
    padding: 80px 0;
}
.product-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.product-detail-grid.reverse {
    direction: rtl;
}
.product-detail-grid.reverse > * {
    direction: ltr;
}

.product-tag {
    display: inline-block;
    padding: 4px 14px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-size: 13px;
    font-weight: 600;
    border-radius: 20px;
    margin-bottom: 16px;
}

.product-detail-content h2 {
    font-size: clamp(28px, 3vw, 36px);
    font-weight: 700;
    margin-bottom: 16px;
}
.product-lead {
    font-size: 17px;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
    line-height: 1.7;
}
.product-features-list {
    margin-bottom: 32px;
}
.product-features-list li {
    padding: 8px 0;
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.6;
    position: relative;
    padding-left: 0;
}
.product-features-list li::before {
    content: '✓';
    color: var(--color-success);
    font-weight: 700;
    margin-right: 8px;
}
.product-features-list li strong {
    color: var(--color-text);
}
.product-actions {
    display: flex;
    gap: 16px;
}

/* Visual Cards */
.visual-card {
    background: #fff;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    border: 1px solid var(--color-border);
}
.visual-header {
    padding: 14px 20px;
    background: var(--color-bg-alt);
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-secondary);
    border-bottom: 1px solid var(--color-border);
}
.visual-body {
    padding: 20px;
    font-size: 14px;
    line-height: 1.8;
    color: var(--color-text-secondary);
}
.visual-body h4 {
    font-size: 16px;
    color: var(--color-text);
    margin-bottom: 12px;
}
.visual-body ol,
.visual-body ul {
    padding-left: 20px;
    margin: 8px 0;
    list-style: decimal;
}
.visual-body ul { list-style: disc; }

/* Translation Chat */
.translation-chat {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.chat-bubble {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    max-width: 80%;
}
.chat-bubble.left {
    background: var(--color-bg-alt);
    align-self: flex-start;
}
.chat-bubble.right {
    background: var(--color-primary-light);
    align-self: flex-end;
    text-align: right;
}
.chat-bubble .orig {
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 2px;
}
.chat-bubble .trans {
    font-size: 12px;
    color: var(--color-text-muted);
}

/* Subtitle Preview */
.subtitle-preview-box .video-frame {
    position: relative;
    background: #000;
    border-radius: var(--radius-sm);
    overflow: hidden;
    aspect-ratio: 16 / 9;
    display: flex;
    align-items: center;
    justify-content: center;
}
.video-placeholder {
    color: rgba(255,255,255,0.3);
    font-size: 14px;
}
.subtitle-overlay {
    position: absolute;
    bottom: 16px;
    left: 0;
    right: 0;
    text-align: center;
    background: rgba(0,0,0,0.7);
    padding: 8px 16px;
}
.subtitle-overlay .sub-zh {
    color: #fff;
    font-size: 14px;
    font-weight: 600;
}
.subtitle-overlay .sub-en {
    color: rgba(255,255,255,0.7);
    font-size: 12px;
}

/* --- About Page --- */
.about-intro {
    padding: 80px 0;
}
.about-grid {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 60px;
    align-items: center;
}
.about-text h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 24px;
}
.about-text p {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}
.about-visual {
    text-align: center;
    padding: 48px 32px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
}
.about-logo-big {
    font-size: 80px;
    margin-bottom: 16px;
}
.about-visual p {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-text);
}
.about-slogan {
    font-size: 16px !important;
    font-weight: 400 !important;
    color: var(--color-text-muted) !important;
}

/* Timeline */
.milestones {
    padding: 80px 0;
}
.timeline {
    max-width: 700px;
    margin: 48px auto 0;
    position: relative;
    padding-left: 40px;
}
.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-primary);
    opacity: 0.2;
}
.timeline-item {
    position: relative;
    margin-bottom: 40px;
}
.timeline-item::before {
    content: '';
    position: absolute;
    left: -45px;
    top: 8px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-primary);
    border: 3px solid #fff;
    box-shadow: 0 0 0 3px var(--color-primary);
}
.timeline-year {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 4px;
}
.timeline-content h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 6px;
}
.timeline-content p {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* Values */
.values {
    padding: 80px 0;
}
.values-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 48px;
}
.value-card {
    text-align: center;
    padding: 36px 20px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    transition: all var(--transition);
}
.value-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}
.value-icon {
    font-size: 44px;
    margin-bottom: 16px;
}
.value-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
}
.value-card p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* --- Pricing --- */
.pricing-section {
    padding: 80px 0;
}
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.pricing-card {
    position: relative;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    text-align: center;
    transition: all var(--transition);
}
.pricing-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}
.pricing-card.popular {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 1px var(--color-primary), var(--shadow-md);
    transform: scale(1.03);
}
.pricing-card.popular:hover {
    transform: scale(1.03) translateY(-4px);
}
.popular-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-primary);
    color: #fff;
    padding: 6px 20px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
}
.pricing-header h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 16px;
}
.pricing-price {
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 8px;
}
.pricing-price .currency {
    font-size: 20px;
    vertical-align: super;
}
.pricing-price .amount {
    font-size: 48px;
    line-height: 1;
}
.pricing-price .period {
    font-size: 14px;
    color: var(--color-text-muted);
    font-weight: 400;
}
.pricing-header > p {
    font-size: 14px;
    color: var(--color-text-muted);
    margin-bottom: 28px;
}
.pricing-features {
    text-align: left;
    margin-bottom: 32px;
}
.pricing-features li {
    padding: 8px 0;
    font-size: 14px;
    color: var(--color-text-secondary);
    border-bottom: 1px solid var(--color-bg-alt);
}
.pricing-features li:last-child {
    border-bottom: none;
}
.pricing-card.enterprise .pricing-price {
    margin: 20px 0;
}

/* FAQ Brief */
.faq-brief {
    padding: 80px 0;
}
.faq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-top: 48px;
}
.faq-item {
    background: #fff;
    padding: 28px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}
.faq-item h3 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-text);
}
.faq-item p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* --- Cases Page --- */
.cases-section {
    padding: 80px 0;
}
.cases-list {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 32px;
}
.case-detail-card {
    display: flex;
    gap: 28px;
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 36px;
    border: 1px solid var(--color-border);
    transition: all var(--transition);
}
.case-detail-card:hover {
    box-shadow: var(--shadow-md);
}
.case-icon-lg {
    font-size: 56px;
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
}
.case-tag {
    display: inline-block;
    padding: 3px 12px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-size: 12px;
    font-weight: 600;
    border-radius: 12px;
    margin-bottom: 8px;
}
.case-content h2 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
}
.case-content p {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}
.case-content blockquote {
    font-style: italic;
    padding: 12px 16px;
    background: var(--color-bg-alt);
    border-left: 3px solid var(--color-primary);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin-bottom: 8px;
    font-size: 15px;
    color: var(--color-text-secondary);
}
.case-content cite {
    font-size: 14px;
    color: var(--color-text-muted);
    font-style: normal;
}

/* --- Contact Page --- */
.contact-section {
    padding: 80px 0;
}
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
}
.contact-info h2,
.contact-form-wrapper h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 24px;
}
.contact-form-wrapper > p {
    color: var(--color-text-secondary);
    margin-bottom: 28px;
}
.contact-info-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.contact-info-item {
    display: flex;
    gap: 16px;
    padding: 20px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    transition: all var(--transition);
}
.contact-info-item:hover {
    background: #fff;
    box-shadow: var(--shadow-sm);
}
.contact-icon {
    font-size: 28px;
    flex-shrink: 0;
}
.contact-detail h3 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 4px;
}
.contact-detail p {
    font-size: 15px;
    color: var(--color-text);
    font-weight: 600;
    margin-bottom: 2px;
}
.contact-detail span {
    font-size: 13px;
    color: var(--color-text-muted);
}

/* Contact Form */
.contact-form {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 36px;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}
.form-group {
    margin-bottom: 20px;
}
.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
}
.required {
    color: var(--color-error);
}
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: 15px;
    font-family: var(--font-family);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: #fff;
    transition: all var(--transition);
    color: var(--color-text);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(22, 119, 255, 0.1);
}
.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-muted);
}
.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* --- Footer --- */
.site-footer {
    background: var(--color-bg-dark);
    color: rgba(255,255,255,0.7);
    padding: 64px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1.2fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
}
.footer-logo .logo-text {
    font-size: 20px;
    font-weight: 700;
    color: #fff;
}
.footer-about {
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 20px;
}
.footer-social {
    display: flex;
    gap: 12px;
}
.footer-social a {
    font-size: 20px;
    opacity: 0.7;
    transition: opacity var(--transition);
}
.footer-social a:hover {
    opacity: 1;
}
.footer-title {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 20px;
}
.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.footer-col ul li,
.footer-col ul li a {
    font-size: 14px;
    color: rgba(255,255,255,0.6);
    transition: color var(--transition);
}
.footer-col ul li a:hover {
    color: #fff;
}
.footer-contact li {
    font-size: 14px;
    color: rgba(255,255,255,0.6);
}
.footer-bottom {
    padding: 24px 0;
    text-align: center;
    font-size: 13px;
    color: rgba(255,255,255,0.4);
}
.footer-bottom a {
    color: rgba(255,255,255,0.5);
}

/* --- Responsive Design --- */
@media (max-width: 1024px) {
    .features-grid,
    .cases-grid,
    .testimonials-slider { grid-template-columns: repeat(2, 1fr); }
    .pricing-grid { grid-template-columns: repeat(2, 1fr); }
    .values-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(3, 1fr); }
    .hero-stats { grid-template-columns: repeat(2, 1fr); }
    .tech-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    :root { --header-height: 60px; }

    /* Mobile Nav */
    .mobile-menu-toggle { display: block; }
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        flex-direction: column;
        background: #fff;
        padding: 80px 24px 24px;
        box-shadow: var(--shadow-lg);
        transition: right 0.3s ease;
        gap: 0;
        z-index: 999;
        align-items: stretch;
    }
    .nav-menu.active { right: 0; }
    .nav-link { padding: 14px 0; font-size: 16px; border-bottom: 1px solid var(--color-border); }

    .dropdown-menu {
        position: static;
        box-shadow: none;
        opacity: 1;
        visibility: visible;
        transform: none;
        padding: 0 0 8px 16px;
    }
    .dropdown-menu a { padding: 8px 0; }
    .nav-actions { display: none; }

    /* Hero */
    .hero .container { grid-template-columns: 1fr; text-align: center; }
    .hero-cta { justify-content: center; }
    .hero-image { display: none; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); }

    /* Products */
    .product-detail-grid,
    .product-detail-grid.reverse {
        grid-template-columns: 1fr;
        direction: ltr;
    }
    .product-detail-grid.reverse > * { direction: ltr; }

    /* Section */
    .features-grid,
    .cases-grid,
    .testimonials-slider { grid-template-columns: 1fr; }
    .tech-grid { grid-template-columns: 1fr; }

    /* About */
    .about-grid { grid-template-columns: 1fr; }

    /* Pricing */
    .pricing-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }
    .pricing-card.popular { transform: none; }
    .pricing-card.popular:hover { transform: translateY(-4px); }

    /* Cases */
    .case-detail-card { flex-direction: column; }
    .case-icon-lg { width: 60px; height: 60px; font-size: 36px; }

    /* Contact */
    .contact-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }

    /* Footer */
    .footer-grid { grid-template-columns: repeat(2, 1fr); }

    /* Misc */
    .values-grid { grid-template-columns: 1fr; }
    .faq-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .hero-stats { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr; }
    .hero-content h1 { font-size: 28px; }
    .btn-lg { padding: 14px 24px; font-size: 15px; }
    .section-header h2 { font-size: 24px; }
}

/* --- Print Styles --- */
@media print {
    .site-header, .site-footer, .skip-link, .mobile-menu-toggle { display: none; }
    body { font-size: 14px; }
    a[href]::after { content: " (" attr(href) ")"; font-size: 12px; }
}