/* ==========================================================================
   花云机场 (Huayun Cloud) - Premium Aesthetic Style Sheet
   Theme: Soft Sakura Pink & Pure White (#FFF0F5, #FFB6C1, #FF69B4, #2D3748)
   ========================================================================== */

:root {
    --bg-main: #FFF8FA;
    --bg-card: rgba(255, 255, 255, 0.85);
    --bg-card-hover: rgba(255, 255, 255, 0.98);
    --primary: #FF6599;
    --primary-hover: #FF4081;
    --primary-light: #FFEBF2;
    --primary-gradient: linear-gradient(135deg, #FF6599 0%, #FF8DA1 50%, #FF758C 100%);
    --accent-gradient: linear-gradient(135deg, #FF9A9E 0%, #FECFEF 99%, #FECFEF 100%);
    --text-main: #2D3436;
    --text-muted: #636E72;
    --text-light: #A0AEC0;
    --border-color: rgba(255, 182, 193, 0.3);
    --border-hover: rgba(255, 101, 153, 0.5);
    --shadow-soft: 0 10px 30px rgba(255, 182, 193, 0.2);
    --shadow-hover: 0 20px 40px rgba(255, 105, 180, 0.25);
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 10px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}

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

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* Background Canvas */
#sakura-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 0;
}

/* Layout Utilities */
.container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

.section {
    padding: 90px 0;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px auto;
}

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 18px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 16px;
    border: 1px solid rgba(255, 101, 153, 0.2);
}

.section-title {
    font-size: 2.3rem;
    font-weight: 800;
    color: #1A202C;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

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

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 1.05rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    outline: none;
}

.btn-primary {
    background: var(--primary-gradient);
    color: #FFFFFF;
    box-shadow: 0 8px 25px rgba(255, 101, 153, 0.35);
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 12px 30px rgba(255, 101, 153, 0.5);
    background: linear-gradient(135deg, #FF4081 0%, #FF6599 100%);
}

.btn-secondary {
    background: #FFFFFF;
    color: var(--primary);
    border: 2px solid var(--primary-light);
    box-shadow: var(--shadow-soft);
}

.btn-secondary:hover {
    background: var(--primary-light);
    border-color: var(--primary);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 18px 42px;
    font-size: 1.15rem;
    border-radius: 50px;
}

/* Header & Nav */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 80px;
    z-index: 1000;
    transition: var(--transition);
    background: rgba(255, 248, 250, 0.8);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid rgba(255, 182, 193, 0.2);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 4px 20px rgba(255, 182, 193, 0.15);
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-icon {
    width: 42px;
    height: 42px;
    background: var(--primary-gradient);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #FFF;
    font-size: 1.4rem;
    box-shadow: 0 4px 12px rgba(255, 101, 153, 0.3);
}

.logo-text {
    font-size: 1.4rem;
    font-weight: 800;
    color: #2D3748;
    letter-spacing: -0.5px;
}

.logo-text span {
    color: var(--primary);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-link {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0%;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transition: var(--transition);
}

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

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

/* Mobile Nav Toggle */
.mobile-toggle {
    display: none;
    font-size: 1.5rem;
    background: none;
    border: none;
    color: var(--text-main);
    cursor: pointer;
}

/* Hero Section */
.hero-section {
    padding-top: 160px;
    padding-bottom: 100px;
    position: relative;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 50px;
    align-items: center;
}

.hero-content {
    max-width: 620px;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: #FFF;
    border: 1px solid rgba(255, 101, 153, 0.3);
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 24px;
    box-shadow: var(--shadow-soft);
}

.hero-tag i {
    color: #FFB6C1;
}

.hero-title {
    font-size: 3.4rem;
    font-weight: 900;
    line-height: 1.2;
    color: #1A202C;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

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

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin-bottom: 36px;
    line-height: 1.7;
}

.hero-btns {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 40px;
}

.hero-features-strip {
    display: flex;
    align-items: center;
    gap: 24px;
    padding-top: 24px;
    border-top: 1px dashed rgba(255, 182, 193, 0.4);
}

.strip-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
}

.strip-item i {
    color: var(--primary);
}

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

.visual-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-soft);
    position: relative;
    z-index: 2;
}

.visual-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(255, 182, 193, 0.2);
}

.visual-title {
    font-weight: 700;
    font-size: 1.1rem;
    color: #2D3748;
    display: flex;
    align-items: center;
    gap: 10px;
}

.visual-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: #38A169;
    background: #C6F6D5;
    padding: 4px 12px;
    border-radius: 50px;
    font-weight: 600;
}

.visual-status::before {
    content: '';
    width: 8px;
    height: 8px;
    background: #38A169;
    border-radius: 50%;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(1.2); }
    100% { opacity: 1; transform: scale(1); }
}

.speed-meter {
    background: #FFF;
    border-radius: var(--radius-md);
    padding: 24px;
    text-align: center;
    border: 1px solid rgba(255, 182, 193, 0.2);
    margin-bottom: 20px;
}

.meter-val {
    font-size: 2.8rem;
    font-weight: 900;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    margin-bottom: 6px;
}

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

.mini-node-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.mini-node {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(255, 255, 255, 0.9);
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 182, 193, 0.15);
    font-size: 0.9rem;
}

.mini-node-info {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
}

.flag-icon {
    font-size: 1.1rem;
}

.mini-node-ping {
    font-weight: 700;
    color: #38A169;
    font-family: monospace;
    font-size: 0.95rem;
}

/* Floating Badges */
.floating-badge {
    position: absolute;
    background: #FFF;
    padding: 12px 20px;
    border-radius: 50px;
    box-shadow: 0 10px 25px rgba(255, 105, 180, 0.2);
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 0.85rem;
    color: var(--primary);
    border: 1px solid rgba(255, 182, 193, 0.4);
    z-index: 3;
    animation: float 4s ease-in-out infinite;
}

.badge-1 {
    top: -20px;
    right: -20px;
}

.badge-2 {
    bottom: -20px;
    left: -20px;
    animation-delay: -2s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

/* Node Monitor Section */
.node-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.node-card {
    background: var(--bg-card);
    backdrop-filter: blur(15px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.node-card:hover {
    transform: translateY(-5px);
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-hover);
}

.node-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.node-region {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.1rem;
}

.node-tag {
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    background: var(--primary-light);
    color: var(--primary);
}

.node-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    background: #FFF;
    padding: 14px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    border: 1px solid rgba(255, 182, 193, 0.15);
}

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

.stat-lbl {
    font-size: 0.75rem;
    color: var(--text-light);
    margin-bottom: 2px;
}

.stat-val {
    font-weight: 700;
    font-size: 1.05rem;
    color: #2D3748;
}

.ping-green { color: #38A169; }
.ping-blue { color: #3182CE; }

.node-bar {
    height: 6px;
    background: #EDF2F7;
    border-radius: 10px;
    overflow: hidden;
}

.node-bar-fill {
    height: 100%;
    background: var(--primary-gradient);
    border-radius: 10px;
}

/* Advantage Section */
.adv-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.adv-card {
    background: #FFF;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 36px 30px;
    transition: var(--transition);
    position: relative;
    box-shadow: var(--shadow-soft);
}

.adv-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary);
}

.adv-icon {
    width: 64px;
    height: 64px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin-bottom: 24px;
    transition: var(--transition);
}

.adv-card:hover .adv-icon {
    background: var(--primary-gradient);
    color: #FFF;
    transform: rotate(5deg) scale(1.05);
}

.adv-title {
    font-size: 1.3rem;
    font-weight: 800;
    margin-bottom: 12px;
    color: #2D3748;
}

.adv-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Pricing Section */
.pricing-toggle-wrapper {
    display: flex;
    justify-content: center;
    margin-bottom: 50px;
}

.pricing-toggle {
    display: inline-flex;
    background: #FFF;
    padding: 6px;
    border-radius: 50px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-soft);
}

.toggle-btn {
    padding: 10px 28px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    border: none;
    background: none;
    color: var(--text-muted);
    transition: var(--transition);
}

.toggle-btn.active {
    background: var(--primary-gradient);
    color: #FFF;
    box-shadow: 0 4px 15px rgba(255, 101, 153, 0.3);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    align-items: center;
}

.price-card {
    background: #FFF;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    transition: var(--transition);
    position: relative;
    box-shadow: var(--shadow-soft);
}

.price-card.popular {
    border: 2px solid var(--primary);
    transform: scale(1.04);
    box-shadow: var(--shadow-hover);
}

.popular-badge {
    position: absolute;
    top: -16px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-gradient);
    color: #FFF;
    padding: 6px 20px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.price-header {
    margin-bottom: 24px;
    text-align: center;
}

.plan-name {
    font-size: 1.4rem;
    font-weight: 800;
    color: #2D3748;
    margin-bottom: 8px;
}

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

.price-val {
    font-size: 3.2rem;
    font-weight: 900;
    color: #1A202C;
    text-align: center;
    margin-bottom: 24px;
}

.price-val span {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-muted);
}

.price-features {
    list-style: none;
    margin-bottom: 32px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.price-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95rem;
    color: var(--text-main);
}

.price-features i {
    color: var(--primary);
    font-size: 1.1rem;
}

.price-card .btn {
    width: 100%;
}

/* Testimonial Section */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.review-card {
    background: #FFF;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
}

.review-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.stars {
    color: #FFB800;
    margin-bottom: 16px;
    display: flex;
    gap: 4px;
}

.review-text {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 24px;
}

.review-author {
    display: flex;
    align-items: center;
    gap: 14px;
}

.author-avatar {
    width: 46px;
    height: 46px;
    background: var(--primary-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-weight: 700;
    font-size: 1.1rem;
}

.author-info h4 {
    font-size: 1rem;
    color: #2D3748;
    font-weight: 700;
}

.author-info p {
    font-size: 0.8rem;
    color: var(--text-light);
}

/* FAQ Section */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

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

.faq-question {
    padding: 22px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 700;
    font-size: 1.05rem;
    color: #2D3748;
    cursor: pointer;
    user-select: none;
}

.faq-icon {
    transition: var(--transition);
    color: var(--primary);
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
    background: #FFF8FA;
    border-top: 1px solid rgba(255, 182, 193, 0.15);
}

.faq-answer-inner {
    padding: 20px 28px;
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* Knowledge Base Grid */
.kb-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.kb-card {
    background: #FFF;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: var(--transition);
    box-shadow: var(--shadow-soft);
}

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

.kb-tag {
    align-self: flex-start;
    padding: 4px 12px;
    border-radius: 50px;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 0.75rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.kb-title {
    font-size: 1.15rem;
    font-weight: 800;
    color: #2D3748;
    margin-bottom: 12px;
    line-height: 1.4;

    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.kb-desc {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 20px;

    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.kb-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-light);
    border-top: 1px solid rgba(255, 182, 193, 0.2);
    padding-top: 14px;
}

/* Article Detail Pages Styling */
.article-header-section {
    padding-top: 150px;
    padding-bottom: 40px;
    background: linear-gradient(180deg, #FFEBF2 0%, #FFF8FA 100%);
    text-align: center;
}

.article-title {
    font-size: 2.4rem;
    font-weight: 900;
    color: #1A202C;
    max-width: 900px;
    margin: 0 auto 20px auto;
    line-height: 1.3;
}

.article-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.article-container {
    max-width: 860px;
    margin: 0 auto;
    background: #FFF;
    border-radius: var(--radius-lg);
    padding: 50px 60px;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--border-color);
    margin-top: -30px;
    position: relative;
    z-index: 10;
}

.article-body {
    font-size: 1.05rem;
    line-height: 1.9;
    color: #333;
}

.article-body h2 {
    font-size: 1.6rem;
    font-weight: 800;
    color: #1A202C;
    margin: 40px 0 20px 0;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-light);
}

.article-body h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: #2D3748;
    margin: 28px 0 14px 0;
}

.article-body p {
    margin-bottom: 20px;
}

.article-body ul, .article-body ol {
    margin-bottom: 24px;
    padding-left: 24px;
}

.article-body li {
    margin-bottom: 8px;
}

.article-cta-box {
    background: linear-gradient(135deg, #FFF0F5 0%, #FFE4E1 100%);
    border: 1px solid rgba(255, 101, 153, 0.3);
    border-radius: var(--radius-md);
    padding: 32px;
    text-align: center;
    margin: 40px 0;
}

.article-cta-box h3 {
    margin-top: 0;
    color: var(--primary);
}

/* Footer */
.footer {
    background: #1A202C;
    color: #A0AEC0;
    padding: 70px 0 30px 0;
    margin-top: 80px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 50px;
}

.footer-brand h3 {
    color: #FFF;
    font-size: 1.4rem;
    font-weight: 800;
    margin-bottom: 16px;
}

.footer-brand h3 span {
    color: var(--primary);
}

.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.6;
    max-width: 320px;
}

.footer-col h4 {
    color: #FFF;
    font-size: 1.05rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: #A0AEC0;
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: #FFF;
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid #2D3748;
    padding-top: 30px;
    text-align: center;
    font-size: 0.85rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }

    .hero-content {
        max-width: 100%;
    }

    .hero-btns {
        justify-content: center;
    }

    .hero-features-strip {
        justify-content: center;
    }

    .adv-grid, .pricing-grid, .reviews-grid, .kb-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .mobile-toggle {
        display: block;
    }

    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: #FFF;
        flex-direction: column;
        justify-content: flex-start;
        padding: 40px 24px;
        transition: var(--transition);
        box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    }

    .nav-menu.open {
        left: 0;
    }

    .hero-title {
        font-size: 2.4rem;
    }

    .adv-grid, .pricing-grid, .reviews-grid, .kb-grid {
        grid-template-columns: 1fr;
    }

    .price-card.popular {
        transform: scale(1);
    }

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

    .article-container {
        padding: 30px 20px;
    }
}