:root {
    --bg-primary: #f7f8fc;
    --bg-secondary: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.72);
    --bg-card-solid: #ffffff;
    --bg-nav: rgba(255, 255, 255, 0.78);
    --bg-footer: #1a1a2e;
    --bg-banner: linear-gradient(135deg, #1a1a2e 0%, #16213e 45%, #0f3460 100%);
    --text-primary: #17202a;
    --text-secondary: #334155;
    --text-muted: #4b5563;
    --text-light: #6b7280;
    --text-inverse: #f1f5f9;
    --text-footer: #cbd5e1;
    --text-footer-heading: #f8fafc;
    --heading-primary: #0f172a;
    --heading-secondary: #1e293b;
    --heading-tertiary: #1e293b;
    --border-color: rgba(226, 232, 240, 0.85);
    --border-light: rgba(241, 245, 249, 0.9);
    --brand-primary: #e94560;
    --brand-dark: #b91c3c;
    --brand-light: #fce7eb;
    --accent-blue: #0f3460;
    --accent-blue-light: #e0e7ff;
    --glass-bg: rgba(255, 255, 255, 0.55);
    --glass-border: rgba(255, 255, 255, 0.65);
    --glass-blur: 18px;
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 6px 20px rgba(15, 23, 42, 0.1);
    --shadow-lg: 0 14px 40px rgba(15, 23, 42, 0.16);
    --shadow-glow: 0 8px 28px rgba(233, 69, 96, 0.32);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 22px;
    --radius-xl: 28px;
    --transition: 0.3s cubic-bezier(0.22, 0.61, 0.36, 1);
    --banner-text: #ffffff;
    --banner-subtext: #e2e8f0;
    --badge-bg: #e94560;
    --badge-text: #ffffff;
    --tag-bg: #e0e7ff;
    --tag-text: #1e3a8a;
    --faq-question-color: #0f172a;
    --faq-answer-color: #334155;
    --link-color: #b91c3c;
    --link-hover: #e94560;
    --btn-primary-bg: #e94560;
    --btn-primary-text: #ffffff;
    --btn-outline-border: #e94560;
    --btn-outline-text: #b91c3c;
    --input-bg: rgba(255, 255, 255, 0.85);
    --input-border: #cbd5e1;
    --input-text: #17202a;
    --input-placeholder: #6b7280;
    --scrollbar-track: #f1f5f9;
    --scrollbar-thumb: #cbd5e1;
}

[data-theme="dark"] {
    --bg-primary: #0b1120;
    --bg-secondary: #111c30;
    --bg-card: rgba(30, 41, 59, 0.6);
    --bg-card-solid: #1e293b;
    --bg-nav: rgba(15, 23, 42, 0.8);
    --bg-footer: #070c17;
    --bg-banner: linear-gradient(135deg, #0b1120 0%, #1a1a2e 45%, #16213e 100%);
    --text-primary: #e5e7eb;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --text-light: #94a3b8;
    --text-inverse: #0f172a;
    --text-footer: #cbd5e1;
    --text-footer-heading: #f8fafc;
    --heading-primary: #ffffff;
    --heading-secondary: #f1f5f9;
    --heading-tertiary: #e2e8f0;
    --border-color: rgba(51, 65, 85, 0.85);
    --border-light: rgba(30, 41, 59, 0.9);
    --brand-primary: #f0627a;
    --brand-dark: #e94560;
    --brand-light: rgba(233, 69, 96, 0.16);
    --accent-blue: #60a5fa;
    --accent-blue-light: #1e3a5f;
    --glass-bg: rgba(30, 41, 59, 0.5);
    --glass-border: rgba(148, 163, 184, 0.18);
    --glass-blur: 20px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 14px 40px rgba(0, 0, 0, 0.55);
    --shadow-glow: 0 8px 28px rgba(240, 98, 122, 0.35);
    --banner-text: #ffffff;
    --banner-subtext: #e2e8f0;
    --badge-bg: #e94560;
    --badge-text: #ffffff;
    --tag-bg: #1e3a5f;
    --tag-text: #93c5fd;
    --faq-question-color: #f1f5f9;
    --faq-answer-color: #e2e8f0;
    --link-color: #f0627a;
    --link-hover: #f8a4b8;
    --btn-primary-bg: #e94560;
    --btn-primary-text: #ffffff;
    --btn-outline-border: #f0627a;
    --btn-outline-text: #f0627a;
    --input-bg: rgba(30, 41, 59, 0.85);
    --input-border: #475569;
    --input-text: #e5e7eb;
    --input-placeholder: #94a3b8;
    --scrollbar-track: #1e293b;
    --scrollbar-thumb: #475569;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-primary);
    background-image:
        radial-gradient(circle at 12% 8%, rgba(233, 69, 96, 0.08), transparent 42%),
        radial-gradient(circle at 88% 12%, rgba(15, 52, 96, 0.1), transparent 46%),
        radial-gradient(circle at 50% 100%, rgba(96, 165, 250, 0.07), transparent 50%);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.8;
    font-size: 16px;
    transition: background-color var(--transition), color var(--transition);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

a {
    color: var(--link-color);
    text-decoration: none;
    transition: color var(--transition), opacity var(--transition);
}

a:hover {
    color: var(--link-hover);
}

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

::-webkit-scrollbar {
    width: 9px;
    height: 9px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 6px;
    border: 2px solid transparent;
    background-clip: padding-box;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--brand-primary);
    background-clip: padding-box;
}

::selection {
    background: var(--brand-primary);
    color: #ffffff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.site-nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--bg-nav);
    backdrop-filter: blur(var(--glass-blur)) saturate(180%);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: var(--shadow-sm);
    transition: background-color var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 66px;
    gap: 16px;
}

.nav-logo {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--brand-dark);
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 9px;
    flex-shrink: 0;
    transition: transform var(--transition), color var(--transition);
}

.nav-logo:hover {
    transform: translateY(-1px);
    color: var(--brand-primary);
}

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

.nav-logo svg {
    width: 34px;
    height: 34px;
    border-radius: 9px;
    box-shadow: 0 3px 10px rgba(233, 69, 96, 0.35);
    transition: transform var(--transition), box-shadow var(--transition);
}

.nav-logo:hover svg {
    transform: rotate(-6deg) scale(1.06);
    box-shadow: 0 6px 18px rgba(233, 69, 96, 0.5);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2px;
    list-style: none;
    flex-wrap: nowrap;
}

.nav-links a {
    display: block;
    padding: 8px 13px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    position: relative;
    white-space: nowrap;
    transition: background-color var(--transition), color var(--transition), transform var(--transition);
}

.nav-links a::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 3px;
    width: 0;
    height: 2px;
    background: var(--brand-primary);
    border-radius: 2px;
    transform: translateX(-50%);
    transition: width var(--transition);
}

.nav-links a:hover {
    background: var(--brand-light);
    color: var(--brand-dark);
    transform: translateY(-1px);
}

.nav-links a:hover::after {
    width: 60%;
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.theme-toggle {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    line-height: 1;
    transition: background-color var(--transition), border-color var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.theme-toggle:hover {
    background: var(--brand-light);
    color: var(--brand-dark);
    border-color: var(--brand-primary);
    transform: rotate(18deg) scale(1.08);
    box-shadow: var(--shadow-glow);
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 6px 8px;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition), color var(--transition);
}

.mobile-menu-btn:hover {
    background: var(--brand-light);
    color: var(--brand-primary);
}

.search-box {
    position: relative;
}

.search-box input {
    width: 160px;
    padding: 8px 34px 8px 14px;
    border: 1px solid var(--input-border);
    border-radius: 22px;
    background: var(--input-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: var(--input-text);
    font-size: 0.85rem;
    outline: none;
    transition: border-color var(--transition), width var(--transition), background-color var(--transition), color var(--transition), box-shadow var(--transition);
}

.search-box input::placeholder {
    color: var(--input-placeholder);
}

.search-box input:focus {
    border-color: var(--brand-primary);
    width: 210px;
    box-shadow: 0 0 0 4px rgba(233, 69, 96, 0.14);
}

.search-box button {
    position: absolute;
    right: 6px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    font-size: 0.9rem;
    padding: 4px;
    border-radius: 50%;
    transition: color var(--transition), transform var(--transition);
}

.search-box button:hover {
    color: var(--brand-primary);
    transform: translateY(-50%) scale(1.15);
}

.breadcrumb {
    padding: 14px 0 4px;
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    flex-wrap: wrap;
}

.breadcrumb a {
    color: var(--text-muted);
    transition: color var(--transition);
}

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

.breadcrumb span {
    margin: 0 7px;
    color: var(--text-light);
}

.banner {
    position: relative;
    background: var(--bg-banner);
    border-radius: var(--radius-xl);
    overflow: hidden;
    margin: 18px 0 34px;
    min-height: 340px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 56px 28px;
    box-shadow: var(--shadow-lg);
    isolation: isolate;
}

.banner::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 18% 22%, rgba(233, 69, 96, 0.4), transparent 46%),
        radial-gradient(circle at 82% 78%, rgba(96, 165, 250, 0.34), transparent 48%);
    z-index: -1;
    animation: bannerGlow 9s ease-in-out infinite alternate;
}

.banner::after {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
    background-size: 44px 44px;
    z-index: -1;
    mask-image: radial-gradient(circle at 50% 50%, #000 20%, transparent 78%);
    -webkit-mask-image: radial-gradient(circle at 50% 50%, #000 20%, transparent 78%);
}

@keyframes bannerGlow {
    from {
        opacity: 0.75;
        transform: scale(1);
    }
    to {
        opacity: 1;
        transform: scale(1.12);
    }
}

.banner-slide {
    display: none;
    animation: fadeIn 0.7s cubic-bezier(0.22, 0.61, 0.36, 1);
    max-width: 760px;
}

.banner-slide.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(16px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.banner h1 {
    font-size: 2.3rem;
    font-weight: 800;
    color: var(--banner-text);
    margin-bottom: 18px;
    line-height: 1.3;
    letter-spacing: 0.5px;
    text-shadow: 0 3px 14px rgba(0, 0, 0, 0.35);
}

.banner p {
    font-size: 1.05rem;
    color: var(--banner-subtext);
    max-width: 660px;
    margin: 0 auto 28px;
    text-shadow: 0 1px 6px rgba(0, 0, 0, 0.3);
}

.banner-btn {
    display: inline-block;
    padding: 13px 36px;
    background: var(--btn-primary-bg);
    color: var(--btn-primary-text);
    border-radius: 32px;
    font-weight: 600;
    font-size: 0.95rem;
    position: relative;
    overflow: hidden;
    transition: transform var(--transition), box-shadow var(--transition), color var(--transition);
    box-shadow: 0 6px 22px rgba(233, 69, 96, 0.45);
}

.banner-btn::before {
    content: "";
    position: absolute;
    top: 0;
    left: -120%;
    width: 60%;
    height: 100%;
    background: linear-gradient(115deg, transparent, rgba(255, 255, 255, 0.45), transparent);
    transition: left 0.6s ease;
}

.banner-btn:hover::before {
    left: 130%;
}

.banner-btn:hover {
    transform: translateY(-3px) scale(1.03);
    box-shadow: 0 10px 30px rgba(233, 69, 96, 0.6);
    color: var(--btn-primary-text);
}

.banner-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 9px;
    z-index: 2;
}

.banner-dots button {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: none;
    background: rgba(255, 255, 255, 0.42);
    cursor: pointer;
    transition: background-color var(--transition), transform var(--transition), width var(--transition);
    padding: 0;
}

.banner-dots button:hover {
    background: rgba(255, 255, 255, 0.75);
}

.banner-dots button.active {
    background: #ffffff;
    width: 26px;
    border-radius: 6px;
    transform: scale(1);
}

.section {
    padding: 44px 0;
}

.section-title {
    font-size: 1.65rem;
    font-weight: 800;
    color: var(--heading-primary);
    margin-bottom: 10px;
    text-align: center;
    letter-spacing: 0.4px;
    position: relative;
    display: block;
}

.section-title::after {
    content: "";
    display: block;
    width: 56px;
    height: 4px;
    margin: 12px auto 0;
    border-radius: 4px;
    background: linear-gradient(90deg, var(--brand-primary), var(--accent-blue));
}

.section-subtitle {
    font-size: 0.95rem;
    color: var(--text-muted);
    text-align: center;
    margin-bottom: 34px;
}

.section-title.left {
    text-align: left;
}

.section-title.left::after {
    margin-left: 0;
}

.card {
    background: var(--bg-card);
    backdrop-filter: blur(var(--glass-blur)) saturate(160%);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(160%);
    border-radius: var(--radius-md);
    padding: 26px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--glass-border);
    position: relative;
    overflow: hidden;
    transition: box-shadow var(--transition), transform var(--transition), background-color var(--transition), border-color var(--transition);
}

.card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--brand-primary), var(--accent-blue));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-6px);
    border-color: var(--brand-primary);
}

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

.card h3 {
    font-size: 1.1rem;
    color: var(--heading-secondary);
    margin-bottom: 10px;
    font-weight: 700;
    transition: color var(--transition);
}

.card:hover h3 {
    color: var(--brand-dark);
}

[data-theme="dark"] .card:hover h3 {
    color: var(--brand-primary);
}

.card p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.78;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 22px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
}

.brand-intro {
    background: var(--bg-card);
    backdrop-filter: blur(var(--glass-blur)) saturate(160%);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(160%);
    border-radius: var(--radius-lg);
    padding: 38px 34px;
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition), border-color var(--transition), background-color var(--transition);
}

.brand-intro:hover {
    box-shadow: var(--shadow-md);
}

.brand-intro h2 {
    font-size: 1.5rem;
    color: var(--heading-primary);
    margin-bottom: 16px;
    font-weight: 800;
}

.brand-intro h3 {
    color: var(--heading-secondary);
}

.brand-intro p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 14px;
    line-height: 1.88;
}

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

.tag {
    display: inline-block;
    padding: 4px 14px;
    background: var(--tag-bg);
    color: var(--tag-text);
    border-radius: 22px;
    font-size: 0.78rem;
    font-weight: 600;
    margin: 0 6px 6px 0;
    transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), color var(--transition);
}

.tag:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
    background: var(--brand-primary);
    color: #ffffff;
}

.article-item {
    background: var(--bg-card);
    backdrop-filter: blur(var(--glass-blur)) saturate(160%);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(160%);
    border-radius: var(--radius-md);
    padding: 24px;
    border: 1px solid var(--glass-border);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    transition: box-shadow var(--transition), transform var(--transition), background-color var(--transition), border-color var(--transition);
}

.article-item::after {
    content: "";
    position: absolute;
    top: -60%;
    right: -60%;
    width: 160px;
    height: 160px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(233, 69, 96, 0.18), transparent 70%);
    opacity: 0;
    transition: opacity var(--transition), transform var(--transition);
}

.article-item:hover::after {
    opacity: 1;
    transform: scale(1.2);
}

.article-item:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-6px);
    border-color: var(--brand-primary);
}

.article-item h3 {
    font-size: 1.05rem;
    color: var(--heading-secondary);
    margin-bottom: 8px;
    font-weight: 700;
    line-height: 1.5;
    transition: color var(--transition);
}

.article-item:hover h3 {
    color: var(--brand-dark);
}

[data-theme="dark"] .article-item:hover h3 {
    color: var(--brand-primary);
}

.article-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 10px;
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

.article-item p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.78;
    margin-bottom: 14px;
    flex-grow: 1;
}

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

.read-more:hover {
    color: var(--link-hover);
    gap: 8px;
}

.faq-item {
    background: var(--bg-card);
    backdrop-filter: blur(var(--glass-blur)) saturate(160%);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(160%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    overflow: hidden;
    transition: border-color var(--transition), background-color var(--transition), box-shadow var(--transition);
}

.faq-item:hover {
    border-color: var(--brand-primary);
    box-shadow: var(--shadow-sm);
}

.faq-item.open {
    border-color: var(--brand-primary);
    box-shadow: var(--shadow-md);
}

.faq-question {
    width: 100%;
    text-align: left;
    padding: 18px 22px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    color: var(--faq-question-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    font-family: inherit;
    transition: background-color var(--transition), color var(--transition);
}

.faq-question:hover {
    background: var(--brand-light);
}

[data-theme="dark"] .faq-question:hover {
    background: rgba(233, 69, 96, 0.12);
}

.faq-question .icon {
    font-size: 1.3rem;
    color: var(--brand-dark);
    transition: transform var(--transition), color var(--transition);
    flex-shrink: 0;
    line-height: 1;
}

[data-theme="dark"] .faq-question .icon {
    color: var(--brand-primary);
}

.faq-item.open .faq-question .icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.22, 0.61, 0.36, 1), padding 0.4s ease;
    padding: 0 22px;
}

.faq-item.open .faq-answer {
    max-height: 620px;
    padding: 0 22px 18px;
}

.faq-answer p {
    color: var(--faq-answer-color);
    font-size: 0.92rem;
    line-height: 1.82;
}

.howto-step {
    display: flex;
    gap: 16px;
    margin-bottom: 22px;
    align-items: flex-start;
    padding: 14px 16px;
    border-radius: var(--radius-md);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.howto-step:hover {
    transform: translateX(6px);
    box-shadow: var(--shadow-sm);
    border-color: var(--brand-primary);
}

.howto-num {
    flex-shrink: 0;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--brand-primary), var(--brand-dark));
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.95rem;
    box-shadow: 0 4px 12px rgba(233, 69, 96, 0.35);
    transition: transform var(--transition);
}

.howto-step:hover .howto-num {
    transform: scale(1.1) rotate(-8deg);
}

.howto-content h4 {
    font-size: 1rem;
    color: var(--heading-tertiary);
    margin-bottom: 6px;
    font-weight: 700;
}

.howto-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.78;
}

.data-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 0.9rem;
    background: var(--bg-card);
    backdrop-filter: blur(var(--glass-blur)) saturate(160%);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(160%);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--glass-border);
}

.data-table th {
    background: var(--accent-blue-light);
    color: var(--heading-secondary);
    padding: 14px 18px;
    text-align: left;
    font-weight: 700;
    font-size: 0.88rem;
    white-space: nowrap;
}

[data-theme="dark"] .data-table th {
    background: #1e3a5f;
    color: #f1f5f9;
}

.data-table td {
    padding: 14px 18px;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    transition: background-color var(--transition);
}

.data-table tr:hover td {
    background: var(--brand-light);
}

[data-theme="dark"] .data-table tr:hover td {
    background: rgba(233, 69, 96, 0.08);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
}

.contact-item {
    background: var(--bg-card);
    backdrop-filter: blur(var(--glass-blur)) saturate(160%);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(160%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 26px 22px;
    text-align: center;
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.contact-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--brand-primary);
}

.contact-item .icon {
    font-size: 1.9rem;
    margin-bottom: 12px;
    display: inline-block;
    transition: transform var(--transition);
}

.contact-item:hover .icon {
    transform: scale(1.18) rotate(6deg);
}

.contact-item h4 {
    font-size: 0.95rem;
    color: var(--heading-tertiary);
    margin-bottom: 8px;
    font-weight: 700;
}

.contact-item p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.72;
}

.site-footer {
    background: var(--bg-footer);
    color: var(--text-footer);
    padding: 52px 0 26px;
    margin-top: 44px;
    position: relative;
    overflow: hidden;
    transition: background-color var(--transition), color var(--transition);
}

.site-footer::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--brand-primary), var(--accent-blue), var(--brand-primary));
    background-size: 200% 100%;
    animation: footerLine 6s linear infinite;
}

@keyframes footerLine {
    from {
        background-position: 0% 0;
    }
    to {
        background-position: 200% 0;
    }
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 34px;
    margin-bottom: 34px;
}

.footer-col h4 {
    color: var(--text-footer-heading);
    font-size: 0.95rem;
    margin-bottom: 16px;
    font-weight: 700;
    position: relative;
    padding-bottom: 8px;
}

.footer-col h4::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 26px;
    height: 2px;
    background: var(--brand-primary);
    border-radius: 2px;
}

.footer-col p {
    color: var(--text-footer);
    font-size: 0.85rem;
    line-height: 1.82;
    margin-bottom: 8px;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 9px;
}

.footer-col ul a {
    color: var(--text-footer);
    font-size: 0.85rem;
    transition: color var(--transition), padding-left var(--transition);
    position: relative;
    display: inline-block;
}

.footer-col ul a:hover {
    color: var(--brand-primary);
    padding-left: 6px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 22px;
    text-align: center;
    font-size: 0.82rem;
    color: var(--text-footer);
    line-height: 1.85;
}

.footer-bottom a {
    color: var(--text-footer);
    transition: color var(--transition);
}

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

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--brand-primary), var(--brand-dark));
    color: #ffffff;
    border: none;
    cursor: pointer;
    font-size: 1.25rem;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-glow);
    transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
    z-index: 999;
}

.back-to-top.visible {
    display: flex;
    animation: popIn 0.35s cubic-bezier(0.22, 0.61, 0.36, 1);
}

@keyframes popIn {
    from {
        opacity: 0;
        transform: scale(0.6);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.back-to-top:hover {
    transform: translateY(-4px) scale(1.08);
    box-shadow: 0 12px 32px rgba(233, 69, 96, 0.6);
}

.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s cubic-bezier(0.22, 0.61, 0.36, 1), transform 0.7s cubic-bezier(0.22, 0.61, 0.36, 1);
    will-change: opacity, transform;
}

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

.stat-number {
    font-size: 2.1rem;
    font-weight: 800;
    color: var(--brand-dark);
    display: block;
    line-height: 1.3;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--brand-dark), var(--brand-primary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

[data-theme="dark"] .stat-number {
    background: linear-gradient(135deg, var(--brand-primary), #f8a4b8);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 4px;
    display: block;
}

@media (max-width: 1024px) {
    .nav-links a {
        padding: 8px 10px;
        font-size: 0.86rem;
    }
    .search-box input {
        width: 140px;
    }
    .search-box input:focus {
        width: 170px;
    }
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 900px) {
    .grid-3,
    .contact-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 28px;
    }
    .banner h1 {
        font-size: 1.75rem;
    }
    .banner {
        min-height: 300px;
    }
    .section {
        padding: 36px 0;
    }
}

@media (max-width: 640px) {
    body {
        font-size: 15px;
    }
    .nav-inner {
        height: 60px;
    }
    .nav-logo {
        font-size: 1.15rem;
    }
    .nav-logo svg {
        width: 30px;
        height: 30px;
    }
    .nav-links {
        display: none;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background: var(--bg-nav);
        backdrop-filter: blur(24px) saturate(180%);
        -webkit-backdrop-filter: blur(24px) saturate(180%);
        flex-direction: column;
        align-items: stretch;
        padding: 12px;
        box-shadow: var(--shadow-lg);
        border-top: 1px solid var(--glass-border);
        border-bottom: 1px solid var(--glass-border);
        gap: 4px;
        animation: menuDrop 0.3s ease;
    }
    @keyframes menuDrop {
        from {
            opacity: 0;
            transform: translateY(-10px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
    .nav-links.open {
        display: flex;
    }
    .nav-links a {
        width: 100%;
        padding: 13px 16px;
        font-size: 0.95rem;
    }
    .nav-links a::after {
        display: none;
    }
    .mobile-menu-btn {
        display: block;
    }
    .search-box {
        display: none;
    }
    .grid-3,
    .grid-4,
    .grid-2,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 26px;
    }
    .banner h1 {
        font-size: 1.45rem;
    }
    .banner p {
        font-size: 0.95rem;
    }
    .banner {
        min-height: 250px;
        padding: 34px 18px;
        border-radius: var(--radius-lg);
    }
    .banner-btn {
        padding: 11px 28px;
        font-size: 0.9rem;
    }
    .section-title {
        font-size: 1.35rem;
    }
    .section-subtitle {
        font-size: 0.88rem;
    }
    .brand-intro {
        padding: 24px 18px;
    }
    .brand-intro h2 {
        font-size: 1.25rem;
    }
    .card {
        padding: 22px 18px;
    }
    .howto-step {
        gap: 12px;
        padding: 12px;
    }
    .howto-num {
        width: 34px;
        height: 34px;
        font-size: 0.88rem;
    }
    .back-to-top {
        bottom: 18px;
        right: 18px;
        width: 42px;
        height: 42px;
        font-size: 1.1rem;
    }
    .data-table {
        font-size: 0.82rem;
    }
    .data-table th,
    .data-table td {
        padding: 10px 12px;
    }
    .stat-number {
        font-size: 1.8rem;
    }
}

@media (max-width: 400px) {
    .container {
        padding: 0 14px;
    }
    .banner h1 {
        font-size: 1.3rem;
    }
    .section-title {
        font-size: 1.2rem;
    }
}

@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 print {
    .site-nav,
    .banner-dots,
    .back-to-top,
    .theme-toggle,
    .mobile-menu-btn,
    .search-box {
        display: none !important;
    }
    body {
        background: #ffffff;
        color: #000000;
    }
    .card,
    .brand-intro,
    .article-item,
    .faq-item {
        box-shadow: none;
        border: 1px solid #cccccc;
    }
}