:root {
    --color-bg: #FFFFFF;
    --color-surface: #f8fafc;
    --color-surface-alt: #f1f5f9;
    --color-text: #303948;
    --color-text-light: #64748b;
    --color-accent: #3cbef2;
    --color-accent-dark: #1e9bc8;
    --color-success: #00a859;
    --color-error: #ff3366;
    --color-warning: #f59e0b;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.12);
    --radius-sm: 6px;
    --radius: 12px;
    --radius-md: 16px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-alt: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-main);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
    font-size: 16px;
    font-weight: 400;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--color-border-light);
    transition: all 0.3s ease;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo {
    display: block;
    height: 60px;
    width: auto;
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: translateY(-1px);
}

.logo-badge {
    font-size: 11px;
    font-weight: 700;
    color: var(--color-accent);
    background: linear-gradient(135deg, rgba(60, 190, 242, 0.1) 0%, rgba(60, 190, 242, 0.05) 100%);
    padding: 6px 10px;
    border-radius: 20px;
    letter-spacing: 0.5px;
    border: 1px solid rgba(60, 190, 242, 0.2);
    font-family: var(--font-alt);
}

.navigation {
    display: flex;
    gap: 32px;
}

.nav-link {
    font-family: var(--font-alt);
    font-weight: 500;
    color: var(--color-text);
    text-decoration: none;
    font-size: 14px;
    letter-spacing: 0.3px;
    transition: all 0.2s ease;
    position: relative;
    padding: 4px 0;
}

.nav-link:hover {
    color: var(--color-accent);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    transition: width 0.3s ease;
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
    padding: 8px;
    background: transparent;
    border: none;
}

.menu-line {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: all 0.3s ease;
    border-radius: 1px;
}

.hero-section {
    padding: 80px 0 60px;
    position: relative;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.hero-title {
    margin-bottom: 28px;
}

.title-gradient {
    font-family: var(--font-alt);
    font-size: 56px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: block;
    line-height: 1.1;
    margin-bottom: 8px;
}

.title-sub {
    font-size: 20px;
    color: var(--color-text-light);
    font-weight: 400;
    display: block;
    font-family: var(--font-main);
}

.hero-description {
    font-size: 18px;
    color: var(--color-text-light);
    margin-bottom: 40px;
    max-width: 500px;
    line-height: 1.7;
}

.hero-description strong {
    color: var(--color-text);
    font-weight: 600;
}

.hero-stats {
    display: flex;
    gap: 40px;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-family: var(--font-alt);
    font-size: 28px;
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 13px;
    color: var(--color-text-light);
    letter-spacing: 0.5px;
    font-weight: 500;
}

.hero-visual {
    position: relative;
    height: 320px;
}

.visual-circle {
    position: absolute;
    border-radius: 50%;
    border: 1px solid;
    animation-duration: 8s;
    animation-iteration-count: infinite;
    animation-timing-function: ease-in-out;
}

.visual-circle:nth-child(1) {
    width: 220px;
    height: 220px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-color: rgba(60, 190, 242, 0.15);
    animation-name: pulse-1;
}

.visual-circle:nth-child(2) {
    width: 160px;
    height: 160px;
    top: 20%;
    right: 10%;
    border-color: rgba(60, 190, 242, 0.25);
    animation-name: pulse-2;
}

.visual-circle:nth-child(3) {
    width: 120px;
    height: 120px;
    bottom: 10%;
    left: 20%;
    border-color: rgba(60, 190, 242, 0.35);
    animation-name: pulse-3;
}

@keyframes pulse-1 {
    0%, 100% { transform: translate(-50%, -50%) scale(1); }
    50% { transform: translate(-50%, -50%) scale(1.05); }
}

@keyframes pulse-2 {
    0%, 100% { transform: scale(1) rotate(0deg); }
    50% { transform: scale(1.03) rotate(180deg); }
}

@keyframes pulse-3 {
    0%, 100% { transform: scale(1); }
    33% { transform: scale(1.08); }
    66% { transform: scale(0.95); }
}

.links-section {
    padding: 60px 0;
}

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

.section-header h2 {
    font-family: var(--font-alt);
    font-size: 40px;
    margin-bottom: 12px;
    color: var(--color-text);
    font-weight: 700;
}

.section-subtitle {
    color: var(--color-text-light);
    font-size: 16px;
    font-weight: 400;
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 24px;
    margin-bottom: 48px;
}

.link-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 28px;
    border: 1px solid var(--color-border);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.link-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.link-card:hover::before {
    opacity: 1;
}

.link-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.link-status {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-success);
    position: relative;
    box-shadow: 0 0 0 4px rgba(0, 168, 89, 0.15);
}

.link-status.active::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: rgba(0, 168, 89, 0.1);
    top: -5px;
    left: -5px;
    animation: status-pulse 2s infinite;
}

@keyframes status-pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.5); opacity: 0; }
}

.link-number {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-light);
    letter-spacing: 0.5px;
    font-family: var(--font-alt);
}

.link-url {
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;
    font-size: 15px;
    color: var(--color-text);
    margin-bottom: 20px;
    line-height: 1.5;
    cursor: pointer;
    padding: 16px;
    background: var(--color-bg);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    transition: all 0.2s ease;
    word-break: break-all;
}

.link-url:hover {
    border-color: var(--color-accent);
    background: rgba(60, 190, 242, 0.02);
}

.link-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.link-latency {
    font-size: 13px;
    color: var(--color-success);
    font-weight: 600;
    font-family: var(--font-alt);
}

.copy-btn {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    color: white;
    border: none;
    padding: 10px 24px;
    border-radius: var(--radius);
    font-family: var(--font-alt);
    font-weight: 600;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s ease;
    letter-spacing: 0.3px;
    position: relative;
    overflow: hidden;
}

.copy-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.copy-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(60, 190, 242, 0.3);
}

.copy-btn:hover::before {
    left: 100%;
}

.links-note {
    display: flex;
    gap: 16px;
    background: linear-gradient(135deg, rgba(255, 51, 102, 0.05) 0%, rgba(255, 51, 102, 0.02) 100%);
    border: 1px solid rgba(255, 51, 102, 0.15);
    border-radius: var(--radius-lg);
    padding: 24px;
    align-items: flex-start;
    max-width: 800px;
    margin: 0 auto;
}

.note-icon {
    font-size: 24px;
    color: var(--color-error);
    flex-shrink: 0;
    margin-top: 2px;
}

.links-note p {
    color: var(--color-text);
    font-size: 15px;
    line-height: 1.6;
}

.links-note strong {
    color: var(--color-error);
    font-weight: 600;
}

.verification-section {
    padding: 80px 0;
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-surface-alt) 100%);
}

.verification-card {
    background: var(--color-bg);
    border-radius: var(--radius-xl);
    padding: 48px;
    box-shadow: var(--shadow-lg);
    max-width: 800px;
    margin: 0 auto;
    border: 1px solid var(--color-border-light);
}

.verification-card h2 {
    font-family: var(--font-alt);
    font-size: 36px;
    margin-bottom: 16px;
    color: var(--color-text);
    font-weight: 700;
    text-align: center;
}

.verification-description {
    color: var(--color-text-light);
    margin-bottom: 40px;
    text-align: center;
    font-size: 17px;
    line-height: 1.7;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.verification-input-group {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

.verification-input {
    flex: 1;
    padding: 18px 24px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-family: var(--font-main);
    font-size: 16px;
    transition: all 0.3s ease;
    background: var(--color-surface);
    color: var(--color-text);
}

.verification-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(60, 190, 242, 0.1);
    background: var(--color-bg);
}

.verification-btn {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    color: white;
    border: none;
    padding: 18px 36px;
    border-radius: var(--radius);
    font-family: var(--font-alt);
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 0.3px;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.verification-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.verification-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 24px rgba(60, 190, 242, 0.25);
}

.verification-btn:hover::before {
    left: 100%;
}

.validation-result {
    margin-top: 20px;
    padding: 20px;
    border-radius: var(--radius);
    display: none;
    font-weight: 500;
    font-size: 15px;
    animation: fadeIn 0.3s ease;
}

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

.validation-result.success {
    display: block;
    background: linear-gradient(135deg, rgba(0, 168, 89, 0.1) 0%, rgba(0, 168, 89, 0.05) 100%);
    border: 1px solid var(--color-success);
    color: var(--color-success);
}

.validation-result.error {
    display: block;
    background: linear-gradient(135deg, rgba(255, 51, 102, 0.1) 0%, rgba(255, 51, 102, 0.05) 100%);
    border: 1px solid var(--color-error);
    color: var(--color-error);
}

.verification-tips {
    margin-top: 48px;
    padding-top: 48px;
    border-top: 1px solid var(--color-border);
}

.verification-tips h3 {
    font-family: var(--font-alt);
    font-size: 20px;
    margin-bottom: 24px;
    color: var(--color-text);
    font-weight: 600;
}

.verification-tips ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
}

.verification-tips li {
    position: relative;
    padding-left: 32px;
    color: var(--color-text);
    line-height: 1.6;
    font-size: 15px;
}

.verification-tips li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: bold;
    font-size: 18px;
    top: -2px;
}

.review-section {
    padding: 80px 0;
}

.review-content {
    display: flex;
    flex-direction: column;
    gap: 32px;
    max-width: 900px;
    margin: 0 auto;
}

.review-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
}

.review-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.review-card h3 {
    font-family: var(--font-alt);
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--color-text);
    font-weight: 600;
}

.review-card p {
    color: var(--color-text);
    line-height: 1.7;
    margin-bottom: 16px;
    font-size: 16px;
}

.review-card p:last-child {
    margin-bottom: 0;
}

.review-pros-cons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
    margin: 48px 0;
}

.pros, .cons {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid var(--color-border);
}

.pros {
    border-top: 4px solid var(--color-success);
}

.cons {
    border-top: 4px solid var(--color-error);
}

.pros h3, .cons h3 {
    font-family: var(--font-alt);
    font-size: 22px;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
}

.pros h3::before {
    content: '✓';
    color: var(--color-success);
    font-weight: bold;
    font-size: 24px;
}

.cons h3::before {
    content: '⚠';
    color: var(--color-error);
    font-size: 24px;
}

.pros ul, .cons ul {
    list-style: none;
    padding: 0;
}

.pros li, .cons li {
    position: relative;
    padding-left: 28px;
    margin-bottom: 14px;
    color: var(--color-text);
    line-height: 1.6;
    font-size: 15px;
}

.pros li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: bold;
    font-size: 18px;
}

.cons li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-error);
    font-weight: bold;
    font-size: 18px;
}

.review-summary {
    background: linear-gradient(135deg, rgba(60, 190, 242, 0.05) 0%, rgba(48, 57, 72, 0.03) 100%);
    border-radius: var(--radius-xl);
    padding: 48px;
    border: 1px solid rgba(60, 190, 242, 0.2);
}

.review-summary h3 {
    font-family: var(--font-alt);
    font-size: 28px;
    margin-bottom: 24px;
    color: var(--color-text);
    font-weight: 700;
}

.review-summary p {
    color: var(--color-text);
    line-height: 1.7;
    margin-bottom: 20px;
    font-size: 17px;
}

.security-section {
    padding: 80px 0;
    background: linear-gradient(180deg, var(--color-surface-alt) 0%, var(--color-bg) 100%);
}

.security-section h2 {
    font-family: var(--font-alt);
    font-size: 40px;
    margin-bottom: 48px;
    text-align: center;
    color: var(--color-text);
    font-weight: 700;
}

.security-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.security-card {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.security-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.security-card:hover::before {
    opacity: 1;
}

.security-icon {
    font-size: 40px;
    margin-bottom: 24px;
    display: block;
    line-height: 1;
}

.security-card h3 {
    font-family: var(--font-alt);
    font-size: 22px;
    margin-bottom: 16px;
    color: var(--color-text);
    font-weight: 600;
}

.security-card p {
    color: var(--color-text-light);
    font-size: 15px;
    line-height: 1.6;
}

.guide-section {
    padding: 80px 0;
}

.guide-section h2 {
    font-family: var(--font-alt);
    font-size: 40px;
    margin-bottom: 48px;
    text-align: center;
    color: var(--color-text);
    font-weight: 700;
}

.guide-steps {
    max-width: 800px;
    margin: 0 auto 60px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.step {
    display: flex;
    align-items: flex-start;
    gap: 28px;
    padding: 32px;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
    position: relative;
}

.step:hover {
    border-color: var(--color-accent);
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
}

.step-number {
    font-family: var(--font-alt);
    font-size: 28px;
    font-weight: 700;
    color: var(--color-accent);
    background: linear-gradient(135deg, rgba(60, 190, 242, 0.1) 0%, rgba(60, 190, 242, 0.05) 100%);
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    border: 2px solid rgba(60, 190, 242, 0.2);
}

.step-content h3 {
    font-family: var(--font-alt);
    font-size: 22px;
    margin-bottom: 12px;
    color: var(--color-text);
    font-weight: 600;
}

.step-content p {
    color: var(--color-text-light);
    font-size: 16px;
    line-height: 1.7;
}

.guide-warning {
    margin-top: 40px;
    background: linear-gradient(135deg, rgba(255, 51, 102, 0.05) 0%, rgba(255, 51, 102, 0.02) 100%);
    border: 1px solid rgba(255, 51, 102, 0.15);
    border-radius: var(--radius-lg);
    padding: 36px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.guide-warning h3 {
    font-family: var(--font-alt);
    font-size: 22px;
    margin-bottom: 24px;
    color: var(--color-error);
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
}

.guide-warning h3::before {
    content: '⚠';
    font-size: 28px;
}

.guide-warning ul {
    list-style: none;
    padding: 0;
}

.guide-warning li {
    position: relative;
    padding-left: 32px;
    margin-bottom: 16px;
    color: var(--color-text);
    line-height: 1.6;
    font-size: 15px;
}

.guide-warning li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-error);
    font-weight: bold;
    font-size: 24px;
    top: -4px;
}

.footer {
    padding: 80px 0 40px;
    border-top: 1px solid var(--color-border);
    margin-top: 60px;
    background: var(--color-surface-alt);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 48px;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-logo {
    font-family: var(--font-alt);
    font-size: 36px;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: 1px;
}

.footer-tagline {
    color: var(--color-text-light);
    font-size: 16px;
    font-weight: 400;
}

.footer-meta {
    font-size: 14px;
    color: var(--color-text-light);
    margin-top: 8px;
}

.footer-warning {
    background: linear-gradient(135deg, rgba(60, 190, 242, 0.05) 0%, rgba(60, 190, 242, 0.02) 100%);
    padding: 32px;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(60, 190, 242, 0.15);
}

.footer-warning p {
    color: var(--color-text);
    font-size: 15px;
    line-height: 1.7;
}

.footer-warning strong {
    color: var(--color-accent);
    font-weight: 600;
}

.footer-legal {
    grid-column: 1 / -1;
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid var(--color-border);
    color: var(--color-text-light);
    font-size: 13px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.notification {
    position: fixed;
    top: 24px;
    right: 24px;
    background: var(--color-success);
    color: white;
    padding: 16px 28px;
    border-radius: var(--radius);
    z-index: 10000;
    transform: translateX(150%);
    transition: transform 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    font-weight: 600;
    font-size: 14px;
    box-shadow: var(--shadow-lg);
    max-width: 400px;
}

.notification.show {
    transform: translateX(0);
}

@media (max-width: 1100px) {
    .hero-grid {
        gap: 60px;
    }
    
    .title-gradient {
        font-size: 48px;
    }
}

@media (max-width: 992px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .hero-visual {
        height: 240px;
        order: -1;
    }
    
    .visual-circle:nth-child(1) {
        width: 180px;
        height: 180px;
    }
    
    .visual-circle:nth-child(2) {
        width: 140px;
        height: 140px;
    }
    
    .visual-circle:nth-child(3) {
        width: 100px;
        height: 100px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .links-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
}

@media (max-width: 768px) {
    .header {
        padding: 16px 0;
    }
    
    .navigation {
        display: none;
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--color-bg);
        flex-direction: column;
        padding: 24px;
        box-shadow: var(--shadow-lg);
        border-radius: 0 0 var(--radius) var(--radius);
        gap: 20px;
        z-index: 999;
    }
    
    .navigation.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .mobile-menu-btn.active .menu-line:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }
    
    .mobile-menu-btn.active .menu-line:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-btn.active .menu-line:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
    
    .title-gradient {
        font-size: 40px;
    }
    
    .title-sub {
        font-size: 18px;
    }
    
    .hero-description {
        font-size: 17px;
    }
    
    .links-grid {
        grid-template-columns: 1fr;
    }
    
    .verification-input-group {
        flex-direction: column;
    }
    
    .verification-btn {
        width: 100%;
    }
    
    .hero-stats {
        justify-content: flex-start;
        gap: 32px;
    }
    
    .security-grid {
        grid-template-columns: 1fr;
    }
    
    .verification-card {
        padding: 32px 24px;
    }
    
    .review-pros-cons {
        grid-template-columns: 1fr;
    }
    
    .step {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .step-number {
        align-self: center;
    }
    
    .container {
        padding: 0 20px;
    }
}

@media (max-width: 480px) {
    .title-gradient {
        font-size: 32px;
    }
    
    .section-header h2,
    .security-section h2,
    .guide-section h2 {
        font-size: 32px;
    }
    
    .verification-card h2 {
        font-size: 28px;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: 24px;
    }
    
    .stat {
        width: calc(50% - 12px);
    }
    
    .link-card,
    .review-card,
    .pros,
    .cons,
    .review-summary,
    .guide-warning,
    .footer-warning {
        padding: 24px;
    }
    
    .security-card {
        padding: 24px;
    }
    
    .step {
        padding: 24px;
    }
    
    .notification {
        right: 16px;
        left: 16px;
        max-width: none;
    }
    
    .footer-legal {
        flex-direction: column;
        gap: 8px;
    }
    
    .guide-warning li {
        font-size: 14px;
    }
    
    .logo-badge {
        font-size: 10px;
        padding: 4px 8px;
    }
}

@media (max-width: 360px) {
    .container {
        padding: 0 16px;
    }
    
    .link-card,
    .review-card,
    .security-card {
        padding: 20px;
    }
    
    .title-gradient {
        font-size: 28px;
    }
    
    .hero-description {
        font-size: 16px;
    }
}

.features-section {
    padding: 80px 0;
    background: var(--color-surface-alt);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature-card {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

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

.feature-icon {
    font-size: 32px;
    margin-bottom: 20px;
    display: block;
}

.feature-card h3 {
    font-family: var(--font-alt);
    font-size: 22px;
    margin-bottom: 16px;
    color: var(--color-text);
    font-weight: 600;
}

.feature-card p {
    color: var(--color-text);
    line-height: 1.7;
    margin-bottom: 12px;
    font-size: 15px;
}

.tutorial-section {
    padding: 80px 0;
}

.tutorial-content {
    max-width: 800px;
    margin: 0 auto;
}

.tutorial-step {
    margin-bottom: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--color-border);
}

.tutorial-step:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.tutorial-step h3 {
    font-family: var(--font-alt);
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--color-text);
    font-weight: 600;
}

.tutorial-step p {
    color: var(--color-text);
    line-height: 1.7;
    margin-bottom: 16px;
    font-size: 16px;
}

.security-advanced {
    margin-top: 60px;
    padding-top: 60px;
    border-top: 1px solid var(--color-border);
}

.security-advanced h3 {
    font-family: var(--font-alt);
    font-size: 32px;
    margin-bottom: 40px;
    text-align: center;
    color: var(--color-text);
    font-weight: 700;
}

.advanced-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.advanced-feature {
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 24px;
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
}

.advanced-feature:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
}

.advanced-feature h4 {
    font-family: var(--font-alt);
    font-size: 18px;
    margin-bottom: 12px;
    color: var(--color-text);
    font-weight: 600;
}

.advanced-feature p {
    color: var(--color-text-light);
    font-size: 15px;
    line-height: 1.6;
}

.faq-section {
    padding: 80px 0;
    background: var(--color-surface-alt);
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.faq-item {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    padding: 28px;
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.faq-item h3 {
    font-family: var(--font-alt);
    font-size: 18px;
    margin-bottom: 16px;
    color: var(--color-text);
    font-weight: 600;
    line-height: 1.4;
}

.faq-item p {
    color: var(--color-text);
    line-height: 1.6;
    font-size: 15px;
}

.conclusion-section {
    padding: 80px 0;
}

.conclusion-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.conclusion-content h2 {
    font-family: var(--font-alt);
    font-size: 36px;
    margin-bottom: 30px;
    color: var(--color-text);
    font-weight: 700;
}

.conclusion-content p {
    color: var(--color-text);
    line-height: 1.7;
    margin-bottom: 24px;
    font-size: 18px;
}

.conclusion-cta {
    margin-top: 40px;
    padding: 32px;
    background: linear-gradient(135deg, rgba(60, 190, 242, 0.05) 0%, rgba(60, 190, 242, 0.02) 100%);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(60, 190, 242, 0.15);
}

.conclusion-cta p {
    font-size: 17px;
    margin-bottom: 0;
}

.conclusion-cta strong {
    color: var(--color-accent);
}

.footer-seo {
    grid-column: 1 / -1;
    text-align: center;
    padding-top: 20px;
    margin-top: 20px;
    border-top: 1px solid var(--color-border);
}

.footer-seo p {
    color: var(--color-text-light);
    font-size: 13px;
    line-height: 1.6;
    font-weight: 400;
}

@media (max-width: 768px) {
    .features-grid,
    .faq-grid {
        grid-template-columns: 1fr;
    }
    
    .advanced-features {
        grid-template-columns: 1fr;
    }
    
    .conclusion-content h2 {
        font-size: 28px;
    }
    
    .conclusion-content p {
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .feature-card,
    .faq-item,
    .advanced-feature {
        padding: 24px;
    }
    
    .conclusion-cta {
        padding: 24px;
    }
}

.primary-link-section {
    padding: 60px 0;
    background: linear-gradient(180deg, var(--color-surface-alt) 0%, var(--color-bg) 100%);
}

.primary-link-card {
    background: var(--color-bg);
    border-radius: var(--radius-xl);
    padding: 48px;
    box-shadow: var(--shadow-lg);
    max-width: 800px;
    margin: 0 auto;
    border: 2px solid var(--color-accent);
    text-align: center;
}

.primary-link-card h2 {
    font-family: var(--font-alt);
    font-size: 32px;
    margin-bottom: 20px;
    color: var(--color-text);
    font-weight: 700;
}

.primary-link-description {
    color: var(--color-text-light);
    margin-bottom: 32px;
    font-size: 18px;
    line-height: 1.6;
}

.primary-link-display {
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 24px;
    border: 1px solid var(--color-border);
}

.primary-link-url {
    font-family: 'SF Mono', monospace;
    font-size: 16px;
    color: var(--color-text);
    display: block;
    margin-bottom: 20px;
    word-break: break-all;
    line-height: 1.5;
}

.primary-copy-btn {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    color: white;
    border: none;
    padding: 16px 32px;
    border-radius: var(--radius);
    font-family: var(--font-alt);
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: all 0.2s ease;
    letter-spacing: 0.3px;
    width: 100%;
    max-width: 300px;
    margin: 0 auto;
    display: block;
}

.primary-copy-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(60, 190, 242, 0.3);
}

.primary-link-note {
    color: var(--color-text-light);
    font-size: 15px;
    line-height: 1.6;
    margin-top: 24px;
}

.seo-content-section {
    padding: 60px 0;
    background: var(--color-surface-alt);
}

.seo-content {
    max-width: 800px;
    margin: 0 auto;
}

.seo-content h2 {
    font-family: var(--font-alt);
    font-size: 32px;
    margin-bottom: 24px;
    color: var(--color-text);
    font-weight: 700;
}

.seo-content h3 {
    font-family: var(--font-alt);
    font-size: 24px;
    margin: 32px 0 16px;
    color: var(--color-text);
    font-weight: 600;
}

.seo-content p {
    color: var(--color-text);
    line-height: 1.7;
    margin-bottom: 16px;
    font-size: 16px;
}

.seo-content strong {
    font-weight: 600;
}

.footer-seo p {
    color: var(--color-text-light);
    font-size: 12px;
    line-height: 1.6;
    margin-top: 10px;
    opacity: 0.8;
}

@media (max-width: 768px) {
    .primary-link-card {
        padding: 32px 24px;
    }
    
    .primary-link-card h2 {
        font-size: 26px;
    }
    
    .seo-content h2 {
        font-size: 26px;
    }
    
    .seo-content h3 {
        font-size: 20px;
    }
    
    .primary-link-description {
        font-size: 16px;
    }
    
    .primary-link-url {
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .primary-link-card {
        padding: 24px 20px;
    }
    
    .primary-link-display {
        padding: 20px;
    }
    
    .seo-content-section {
        padding: 40px 0;
    }
    
    .primary-copy-btn {
        padding: 14px 24px;
        font-size: 14px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .primary-copy-btn,
    .feature-card,
    .security-card,
    .faq-item,
    .link-card {
        transition: none;
    }
    
    .primary-copy-btn:hover,
    .feature-card:hover,
    .security-card:hover,
    .faq-item:hover,
    .link-card:hover {
        transform: none;
    }
}

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

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

.link-url:focus,
.verification-input:focus,
.primary-copy-btn:focus,
.copy-btn:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-accent);
    color: white;
    padding: 8px;
    text-decoration: none;
    z-index: 1001;
}

.skip-link:focus {
    top: 0;
}

[itemprop="url"] {
    font-weight: 500;
}

@media print {
    .hero-visual,
    .visual-circle,
    .notification,
    .copy-btn,
    .primary-copy-btn,
    .verification-btn {
        display: none;
    }
    
    .link-url,
    .primary-link-url {
        border: 1px solid #ccc;
        background: white;
    }
}