:root {
    --brand-primary: #1a1a2e;
    --brand-secondary: #16213e;
    --brand-accent: #e94560;
    --brand-accent-hover: #c73650;
    --brand-accent-light: rgba(233, 69, 96, 0.1);
    --brand-light: #f5f5f7;
    --brand-white: #ffffff;
    --brand-gray: #6c6c80;
    --brand-border: #e0e0e6;
    --brand-shadow: rgba(26, 26, 46, 0.08);
    --brand-shadow-hover: rgba(26, 26, 46, 0.16);
    --glass-bg: rgba(255, 255, 255, 0.72);
    --glass-border: rgba(255, 255, 255, 0.35);
    --glass-blur: 16px;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-slow: all 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --max-width: 1200px;
    --header-height: 72px;
    --gradient-primary: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    --gradient-accent: linear-gradient(135deg, #e94560 0%, #ff6b6b 50%, #ffa07a 100%);
    --gradient-card: linear-gradient(135deg, rgba(233, 69, 96, 0.06), rgba(255, 107, 107, 0.03));
}

[data-theme="dark"] {
    --brand-primary: #e8e8f0;
    --brand-secondary: #c0c0d0;
    --brand-light: #0d0d15;
    --brand-white: #1a1a28;
    --brand-gray: #a0a0b0;
    --brand-border: #2a2a3a;
    --brand-shadow: rgba(0, 0, 0, 0.4);
    --brand-shadow-hover: rgba(0, 0, 0, 0.6);
    --glass-bg: rgba(26, 26, 40, 0.72);
    --glass-border: rgba(255, 255, 255, 0.08);
    --gradient-primary: linear-gradient(135deg, #0d0d15 0%, #1a1a28 50%, #1a1a2e 100%);
    --gradient-card: linear-gradient(135deg, rgba(233, 69, 96, 0.1), rgba(255, 107, 107, 0.05));
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
    background-color: var(--brand-light);
    color: var(--brand-primary);
    line-height: 1.8;
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
    padding-top: var(--header-height);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--brand-accent);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--brand-accent-hover);
}

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

ul, ol {
    list-style: none;
}

::selection {
    background: var(--brand-accent);
    color: #fff;
}

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--brand-light);
}

::-webkit-scrollbar-thumb {
    background: var(--brand-gray);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--brand-accent);
}

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

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
    backdrop-filter: blur(var(--glass-blur)) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    z-index: 1000;
    transition: var(--transition);
    box-shadow: 0 2px 20px var(--brand-shadow);
}

.site-header.scrolled {
    box-shadow: 0 4px 30px var(--brand-shadow-hover);
    background: var(--glass-bg);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--brand-primary);
    letter-spacing: -0.5px;
    flex-shrink: 0;
}

.logo svg {
    width: 36px;
    height: 36px;
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.logo:hover svg {
    transform: rotate(-8deg) scale(1.08);
}

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

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

.nav-menu a {
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    color: var(--brand-secondary);
    font-size: 0.92rem;
    font-weight: 500;
    white-space: nowrap;
    transition: var(--transition);
    position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
    background: var(--brand-accent-light);
    color: var(--brand-accent);
}

.nav-menu a.active::after {
    content: "";
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--gradient-accent);
    border-radius: 2px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.search-btn,
.theme-btn,
.menu-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--brand-border);
    background: var(--brand-white);
    color: var(--brand-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    font-size: 1.1rem;
}

.search-btn:hover,
.theme-btn:hover,
.menu-btn:hover {
    background: var(--brand-accent);
    color: #fff;
    border-color: var(--brand-accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(233, 69, 96, 0.35);
}

.menu-btn {
    display: none;
}

.search-panel {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
    backdrop-filter: blur(var(--glass-blur)) saturate(180%);
    padding: 20px 24px;
    border-bottom: 1px solid var(--glass-border);
    box-shadow: 0 10px 30px var(--brand-shadow);
    transform: translateY(-120%);
    transition: transform 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    z-index: 999;
}

.search-panel.open {
    transform: translateY(0);
}

.search-panel form {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    gap: 10px;
}

.search-panel input {
    flex: 1;
    padding: 12px 20px;
    border: 2px solid var(--brand-border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    background: var(--brand-light);
    color: var(--brand-primary);
    outline: none;
    transition: var(--transition);
    font-family: inherit;
}

.search-panel input:focus {
    border-color: var(--brand-accent);
    box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.12);
}

.search-panel button {
    padding: 12px 28px;
    background: var(--gradient-accent);
    color: #fff;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.search-panel button:hover {
    background: var(--brand-accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(233, 69, 96, 0.35);
}

main {
    min-height: 100vh;
}

.breadcrumb {
    padding: 20px 0 10px;
    font-size: 0.85rem;
    color: var(--brand-gray);
}

.breadcrumb ol {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
}

.breadcrumb li {
    display: flex;
    align-items: center;
    gap: 6px;
}

.breadcrumb li::after {
    content: "›";
    color: var(--brand-border);
    font-size: 1rem;
}

.breadcrumb li:last-child::after {
    display: none;
}

.breadcrumb a {
    color: var(--brand-gray);
    font-weight: 400;
}

.breadcrumb a:hover {
    color: var(--brand-accent);
}

.breadcrumb li:last-child {
    color: var(--brand-primary);
    font-weight: 500;
}

.banner-section {
    padding: 10px 0 30px;
}

.banner-slider {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    background: var(--gradient-primary);
    min-height: 340px;
    display: flex;
    align-items: center;
    box-shadow: 0 20px 60px rgba(26, 26, 46, 0.25), 0 0 0 1px rgba(255, 255, 255, 0.05) inset;
}

.banner-slider::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 20% 50%, rgba(233, 69, 96, 0.2) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 20%, rgba(255, 107, 107, 0.12) 0%, transparent 50%),
                radial-gradient(ellipse at 60% 80%, rgba(15, 52, 96, 0.3) 0%, transparent 60%);
    pointer-events: none;
    z-index: 1;
}

.banner-slide {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    padding: 48px 56px;
    opacity: 0;
    transition: opacity 0.7s ease;
    pointer-events: none;
    z-index: 2;
}

.banner-slide.active {
    opacity: 1;
    pointer-events: auto;
    position: relative;
}

.banner-content {
    max-width: 620px;
    color: #fff;
}

.banner-content h2 {
    font-size: 2.1rem;
    font-weight: 800;
    margin-bottom: 14px;
    line-height: 1.3;
    letter-spacing: -0.5px;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
}

.banner-content p {
    font-size: 1rem;
    opacity: 0.9;
    line-height: 1.8;
    margin-bottom: 24px;
    text-shadow: 0 1px 10px rgba(0, 0, 0, 0.15);
}

.banner-content .banner-tag {
    display: inline-block;
    padding: 5px 16px;
    background: rgba(233, 69, 96, 0.25);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(233, 69, 96, 0.45);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 18px;
    letter-spacing: 0.5px;
}

.banner-btn {
    display: inline-block;
    padding: 13px 34px;
    background: var(--gradient-accent);
    color: #fff;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(233, 69, 96, 0.4);
}

.banner-btn:hover {
    background: #fff;
    color: var(--brand-primary);
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.35);
}

.banner-dots {
    position: absolute;
    bottom: 22px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.banner-dots button {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.5);
    background: transparent;
    cursor: pointer;
    transition: var(--transition);
    padding: 0;
}

.banner-dots button.active {
    background: var(--brand-accent);
    border-color: var(--brand-accent);
    width: 28px;
    border-radius: 50px;
    box-shadow: 0 0 12px rgba(233, 69, 96, 0.6);
}

.banner-dots button:hover {
    border-color: rgba(255, 255, 255, 0.9);
}

.stats-section {
    padding: 30px 0;
}

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

.stat-card {
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
    backdrop-filter: blur(var(--glass-blur)) saturate(180%);
    border-radius: var(--radius-lg);
    padding: 30px 20px;
    text-align: center;
    box-shadow: 0 4px 20px var(--brand-shadow);
    transition: var(--transition);
    border: 1px solid var(--glass-border);
    position: relative;
    overflow: hidden;
}

.stat-card::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.stat-card:hover::after {
    transform: scaleX(1);
}

.stat-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 40px var(--brand-shadow-hover);
}

.stat-number {
    font-size: 2.2rem;
    font-weight: 800;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
    margin-bottom: 6px;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--brand-gray);
    font-weight: 500;
}

.section {
    padding: 60px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-header h2 {
    font-size: 1.9rem;
    font-weight: 800;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
    color: var(--brand-primary);
}

.section-header p {
    font-size: 1rem;
    color: var(--brand-gray);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

.section-divider {
    width: 60px;
    height: 4px;
    background: var(--gradient-accent);
    border-radius: 4px;
    margin: 16px auto 0;
    box-shadow: 0 2px 10px rgba(233, 69, 96, 0.3);
}

.brand-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.brand-intro-text h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--brand-primary);
    position: relative;
    padding-left: 16px;
}

.brand-intro-text h3::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 22px;
    background: var(--gradient-accent);
    border-radius: 4px;
}

.brand-intro-text p {
    margin-bottom: 16px;
    color: var(--brand-secondary);
    line-height: 1.9;
}

.brand-intro-text .highlight {
    color: var(--brand-accent);
    font-weight: 600;
}

.brand-intro-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.brand-intro-visual svg {
    width: 100%;
    max-width: 400px;
    height: auto;
    filter: drop-shadow(0 10px 30px rgba(233, 69, 96, 0.15));
    transition: var(--transition-slow);
}

.brand-intro-visual svg:hover {
    transform: scale(1.03);
    filter: drop-shadow(0 15px 40px rgba(233, 69, 96, 0.25));
}

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

.card {
    background: var(--brand-white);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    box-shadow: 0 4px 20px var(--brand-shadow);
    border: 1px solid var(--brand-border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

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

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px var(--brand-shadow-hover);
    border-color: rgba(233, 69, 96, 0.2);
}

.card-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: var(--gradient-card);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 1.5rem;
    transition: var(--transition);
}

.card:hover .card-icon {
    transform: scale(1.1) rotate(-5deg);
}

.card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--brand-primary);
}

.card p {
    font-size: 0.92rem;
    color: var(--brand-gray);
    line-height: 1.8;
    margin-bottom: 16px;
}

.card ul {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.card ul li {
    font-size: 0.88rem;
    color: var(--brand-secondary);
    padding-left: 20px;
    position: relative;
}

.card ul li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--brand-accent);
    font-weight: 700;
}

.solution-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    margin-bottom: 60px;
}

.solution-item:nth-child(even) {
    direction: rtl;
}

.solution-item:nth-child(even) > * {
    direction: ltr;
}

.solution-item h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--brand-primary);
}

.solution-item p {
    margin-bottom: 14px;
    color: var(--brand-secondary);
    line-height: 1.9;
}

.solution-item .solution-tag {
    display: inline-block;
    padding: 5px 16px;
    background: var(--brand-accent-light);
    color: var(--brand-accent);
    border-radius: 50px;
    font-size: 0.82rem;
    font-weight: 600;
    margin-bottom: 14px;
    border: 1px solid rgba(233, 69, 96, 0.15);
}

.solution-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.solution-visual svg {
    width: 100%;
    max-width: 360px;
    height: auto;
    filter: drop-shadow(0 8px 25px rgba(26, 26, 46, 0.1));
    transition: var(--transition-slow);
}

.solution-visual svg:hover {
    transform: translateY(-5px);
    filter: drop-shadow(0 12px 35px rgba(233, 69, 96, 0.2));
}

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

.case-card {
    background: var(--brand-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 4px 20px var(--brand-shadow);
    border: 1px solid var(--brand-border);
    transition: var(--transition);
}

.case-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 40px var(--brand-shadow-hover);
    border-color: rgba(233, 69, 96, 0.2);
}

.case-card-header {
    padding: 24px 24px 0;
}

.case-card-header .case-tag {
    display: inline-block;
    padding: 3px 12px;
    background: var(--brand-accent-light);
    color: var(--brand-accent);
    border-radius: 50px;
    font-size: 0.78rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.case-card-header h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--brand-primary);
    margin-bottom: 8px;
}

.case-card-body {
    padding: 0 24px 24px;
}

.case-card-body p {
    font-size: 0.9rem;
    color: var(--brand-gray);
    line-height: 1.8;
    margin-bottom: 14px;
}

.case-card-body .case-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--brand-gray);
    border-top: 1px solid var(--brand-border);
    padding-top: 12px;
}

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

.testimonial-card {
    background: var(--brand-white);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: 0 4px 20px var(--brand-shadow);
    border: 1px solid var(--brand-border);
    transition: var(--transition);
    position: relative;
}

.testimonial-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 40px var(--brand-shadow-hover);
    border-color: rgba(233, 69, 96, 0.2);
}

.testimonial-card::before {
    content: "\201C";
    position: absolute;
    top: 16px;
    right: 24px;
    font-size: 3.5rem;
    color: rgba(233, 69, 96, 0.1);
    font-family: Georgia, serif;
    line-height: 1;
}

.testimonial-card p {
    font-size: 0.92rem;
    color: var(--brand-secondary);
    line-height: 1.9;
    margin-bottom: 20px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.testimonial-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--gradient-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
    font-size: 1.1rem;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(233, 69, 96, 0.3);
}

.testimonial-author-info h4 {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--brand-primary);
}

.testimonial-author-info span {
    font-size: 0.8rem;
    color: var(--brand-gray);
}

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

.article-card {
    background: var(--brand-white);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: 0 4px 20px var(--brand-shadow);
    border: 1px solid var(--brand-border);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.article-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-accent);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.4s ease;
}

.article-card:hover::before {
    transform: scaleY(1);
}

.article-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 40px var(--brand-shadow-hover);
    border-color: rgba(233, 69, 96, 0.2);
}

.article-meta {
    display: flex;
    gap: 16px;
    font-size: 0.8rem;
    color: var(--brand-gray);
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.article-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--brand-primary);
    line-height: 1.5;
}

.article-card p {
    font-size: 0.9rem;
    color: var(--brand-gray);
    line-height: 1.8;
    margin-bottom: 16px;
    flex: 1;
}

.article-link {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--brand-accent);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: var(--transition);
}

.article-link:hover {
    gap: 10px;
    color: var(--brand-accent-hover);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--brand-white);
    border-radius: var(--radius-md);
    border: 1px solid var(--brand-border);
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: rgba(233, 69, 96, 0.3);
    box-shadow: 0 4px 20px var(--brand-shadow);
}

.faq-item.open {
    border-color: rgba(233, 69, 96, 0.3);
    box-shadow: 0 8px 30px var(--brand-shadow-hover);
}

.faq-question {
    width: 100%;
    padding: 20px 24px;
    background: none;
    border: none;
    text-align: left;
    font-size: 0.98rem;
    font-weight: 600;
    color: var(--brand-primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    transition: var(--transition);
    font-family: inherit;
    line-height: 1.6;
}

.faq-question:hover {
    color: var(--brand-accent);
}

.faq-question .faq-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--brand-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    color: var(--brand-accent);
    flex-shrink: 0;
    transition: transform 0.3s ease, background 0.3s ease;
    font-weight: 700;
}

.faq-item.open .faq-icon {
    transform: rotate(45deg);
    background: var(--brand-accent);
    color: #fff;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    padding: 0 24px;
}

.faq-item.open .faq-answer {
    max-height: 600px;
    padding: 0 24px 20px;
}

.faq-answer p {
    font-size: 0.9rem;
    color: var(--brand-gray);
    line-height: 1.9;
}

.howto-steps {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.howto-step {
    display: flex;
    gap: 24px;
    padding-bottom: 36px;
    position: relative;
}

.howto-step:last-child {
    padding-bottom: 0;
}

.howto-step::before {
    content: "";
    position: absolute;
    left: 23px;
    top: 48px;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--brand-border), transparent);
}

.howto-step:last-child::before {
    display: none;
}

.howto-number {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-accent);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.1rem;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
    box-shadow: 0 4px 15px rgba(233, 69, 96, 0.35);
    transition: var(--transition);
}

.howto-step:hover .howto-number {
    transform: scale(1.1);
    box-shadow: 0 6px 25px rgba(233, 69, 96, 0.5);
}

.howto-content h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--brand-primary);
}

.howto-content p {
    font-size: 0.9rem;
    color: var(--brand-gray);
    line-height: 1.9;
}

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

.contact-card {
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
    backdrop-filter: blur(var(--glass-blur)) saturate(180%);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    text-align: center;
    box-shadow: 0 4px 20px var(--brand-shadow);
    border: 1px solid var(--glass-border);
    transition: var(--transition);
}

.contact-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 40px var(--brand-shadow-hover);
    border-color: rgba(233, 69, 96, 0.2);
}

.contact-card .contact-icon {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--gradient-card);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 1.4rem;
    transition: var(--transition);
}

.contact-card:hover .contact-icon {
    transform: scale(1.1) rotate(-5deg);
}

.contact-card h3 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--brand-primary);
}

.contact-card p {
    font-size: 0.85rem;
    color: var(--brand-gray);
    line-height: 1.7;
}

.contact-card a {
    font-size: 0.85rem;
    color: var(--brand-accent);
    font-weight: 600;
    word-break: break-all;
}

.contact-card a:hover {
    color: var(--brand-accent-hover);
    text-decoration: underline;
}

.site-footer {
    background: var(--brand-primary);
    color: rgba(255, 255, 255, 0.85);
    padding: 60px 0 0;
    margin-top: 40px;
    position: relative;
    overflow: hidden;
}

.site-footer::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-accent);
}

[data-theme="dark"] .site-footer {
    background: #0a0a12;
    color: rgba(255, 255, 255, 0.75);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand h3 {
    font-size: 1.3rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-brand p {
    font-size: 0.88rem;
    line-height: 1.9;
    margin-bottom: 16px;
    opacity: 0.8;
}

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

.footer-brand .footer-tags span {
    padding: 3px 12px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 50px;
    font-size: 0.78rem;
    opacity: 0.8;
    transition: var(--transition);
}

.footer-brand .footer-tags span:hover {
    background: rgba(233, 69, 96, 0.3);
    opacity: 1;
}

.footer-col h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 18px;
}

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

.footer-col ul li a {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: var(--brand-accent);
    padding-left: 4px;
}

.footer-col address {
    font-style: normal;
    font-size: 0.85rem;
    line-height: 1.9;
    opacity: 0.8;
}

.footer-col address a {
    color: rgba(255, 255, 255, 0.8);
}

.footer-col address a:hover {
    color: var(--brand-accent);
}

.footer-bottom {
    padding: 24px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 0.8rem;
    opacity: 0.7;
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.7);
}

.footer-bottom a:hover {
    color: var(--brand-accent);
}

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-accent);
    color: #fff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: 0 6px 20px rgba(233, 69, 96, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 900;
}

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

.back-to-top:hover {
    background: var(--brand-accent-hover);
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(233, 69, 96, 0.5);
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

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

:focus-visible {
    outline: 3px solid var(--brand-accent);
    outline-offset: 2px;
    border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}

@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

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

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

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

    .banner-content h2 {
        font-size: 1.7rem;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 64px;
    }

    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--glass-bg);
        -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
        backdrop-filter: blur(var(--glass-blur)) saturate(180%);
        flex-direction: column;
        padding: 16px 24px;
        border-bottom: 1px solid var(--glass-border);
        box-shadow: 0 10px 30px var(--brand-shadow);
        transform: translateY(-120%);
        transition: transform 0.35s ease;
        z-index: 998;
        gap: 2px;
        align-items: stretch;
    }

    .nav-menu.open {
        transform: translateY(0);
    }

    .nav-menu a {
        padding: 12px 16px;
    }

    .nav-menu a.active::after {
        display: none;
    }

    .menu-btn {
        display: flex;
    }

    .brand-intro {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .brand-intro-visual {
        order: -1;
    }

    .solution-item {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .solution-item:nth-child(even) {
        direction: ltr;
    }

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

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

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

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

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

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .banner-content h2 {
        font-size: 1.4rem;
    }

    .banner-slide {
        padding: 28px 24px;
    }

    .section-header h2 {
        font-size: 1.5rem;
    }

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

    .stat-number {
        font-size: 1.7rem;
    }

    .howto-step {
        gap: 16px;
    }

    .howto-number {
        width: 40px;
        height: 40px;
        font-size: 0.95rem;
    }

    .howto-step::before {
        left: 19px;
        top: 40px;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

    .stat-card {
        padding: 20px 12px;
    }

    .stat-number {
        font-size: 1.4rem;
    }

    .container {
        padding: 0 16px;
    }

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

    .banner-content h2 {
        font-size: 1.2rem;
    }

    .banner-content p {
        font-size: 0.88rem;
    }

    .banner-btn {
        padding: 10px 24px;
        font-size: 0.88rem;
    }

    .banner-slider {
        min-height: 280px;
        border-radius: var(--radius-lg);
    }

    .section {
        padding: 40px 0;
    }

    .section-header h2 {
        font-size: 1.3rem;
    }

    .card {
        padding: 24px 20px;
    }

    .article-card {
        padding: 22px 20px;
    }

    .faq-question {
        padding: 16px 18px;
        font-size: 0.92rem;
    }

    .faq-answer {
        padding: 0 18px;
    }

    .faq-item.open .faq-answer {
        padding: 0 18px 16px;
    }

    .back-to-top {
        width: 42px;
        height: 42px;
        bottom: 20px;
        right: 20px;
    }
}

@media print {
    .site-header,
    .back-to-top,
    .search-panel,
    .banner-dots,
    .nav-menu {
        display: none !important;
    }

    body {
        padding-top: 0;
        background: #fff;
        color: #000;
    }

    .card,
    .case-card,
    .article-card,
    .testimonial-card {
        box-shadow: none;
        border: 1px solid #ddd;
        break-inside: avoid;
    }

    .banner-slider {
        background: #f0f0f0 !important;
        min-height: auto;
    }

    .banner-content h2,
    .banner-content p {
        color: #000;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}