/* ========== 根变量 ========== */
:root {
    --container: 1180px;
    --blue-trust: #0066cc;
    --blue-dark: #003366;
    --blue-light: #e6f2ff;
    --white: #ffffff;
    --gray-light: #f5f5f5;
    --gray-text: #666666;
    --gray-border: #e0e0e0;
    --green: #00b366;
    --orange: #ff9933;
    --duration: 0.3s;
    --transition: var(--duration) ease-out;
}

/* ========== 全局样式 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: #333;
    background: var(--white);
}

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

.image-box,
.star-map-media,
.orbit-media,
.preview-media,
.coordinate-media,
.security-media,
.scenario-media,
.route-media {
    overflow: visible;
    line-height: 0;
    padding: 0;
}

.image-box img,
.star-map-media img,
.orbit-media img,
.preview-media img,
.coordinate-media img,
.security-media img,
.scenario-media img,
.route-media img {
    max-width: 100%;
    height: auto;
    object-fit: contain;
}

.container {
    width: min(100% - 32px, var(--container));
    margin-inline: auto;
}

a {
    color: var(--blue-trust);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* ========== 按钮 ========== */
.btn {
    padding: 12px 32px;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    display: inline-block;
}

.btn-primary {
    background: var(--blue-trust);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--blue-dark);
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--gray-light);
    color: var(--blue-trust);
    border: 1px solid var(--gray-border);
}

.btn-secondary:hover {
    border-color: var(--blue-trust);
    background: var(--blue-light);
}

/* ========== 顶部导航 ========== */
.header {
    position: sticky;
    top: 0;
    background: var(--white);
    border-bottom: 1px solid var(--gray-border);
    z-index: 1000;
    transition: all var(--transition);
}

.header.scrolled {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    padding: 8px 0;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 16px;
    max-width: var(--container);
    margin: 0 auto;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 18px;
    font-weight: 600;
    color: var(--blue-trust);
    cursor: pointer;
}

.logo-img {
    width: 40px;
    height: 40px;
}

.header.scrolled .logo-img {
    width: 32px;
    height: 32px;
}

.header-position {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    font-size: 14px;
    color: var(--gray-text);
}

.position-text {
    color: var(--blue-trust);
    font-weight: 500;
}

.header-actions {
    display: flex;
    gap: 16px;
}

.header-actions .btn-action {
    padding: 8px 16px;
    border: 1px solid var(--gray-border);
    background: var(--white);
    color: var(--blue-trust);
    border-radius: 4px;
    font-size: 14px;
    cursor: pointer;
    transition: all var(--transition);
}

.header-actions .btn-action:hover {
    background: var(--blue-light);
    border-color: var(--blue-trust);
}

.menu-toggle {
    display: none;
    border: none;
    background: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--blue-trust);
}

.progress-line {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--blue-trust), var(--orange));
    width: 0;
    transition: width var(--duration) linear;
}

/* ========== 移动端菜单 ========== */
.mobile-menu {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: 999;
    animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(100%);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.mobile-menu-content {
    background: var(--white);
    max-height: 70vh;
    overflow-y: auto;
    border-radius: 16px 16px 0 0;
    padding: 20px;
}

.mobile-menu-close {
    font-size: 28px;
    color: var(--gray-text);
    cursor: pointer;
    margin-bottom: 16px;
}

.mobile-menu-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--blue-trust);
    margin-bottom: 20px;
}

.mobile-menu-nav {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.mobile-menu-item {
    padding: 12px 16px;
    border: 1px solid var(--gray-border);
    border-radius: 6px;
    background: var(--gray-light);
    color: var(--blue-trust);
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    transition: all var(--transition);
}

.mobile-menu-item:hover {
    background: var(--blue-light);
    border-color: var(--blue-trust);
}

/* ========== Hero 部分 ========== */
.hero {
    padding: 60px 16px;
    background: linear-gradient(135deg, var(--white) 0%, var(--blue-light) 100%);
}

.hero .container {
    width: 100%;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
    margin-bottom: 60px;
}

.hero-label {
    font-size: 14px;
    color: var(--blue-trust);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.hero h1 {
    font-size: 40px;
    font-weight: 700;
    line-height: 1.3;
    color: #000;
    margin-bottom: 20px;
}

.hero-description {
    font-size: 16px;
    line-height: 1.7;
    color: var(--gray-text);
    margin-bottom: 24px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

.hero-warning {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: rgba(255, 153, 51, 0.1);
    border-left: 3px solid var(--orange);
    border-radius: 4px;
    font-size: 14px;
    color: var(--gray-text);
}

.warning-icon {
    font-size: 18px;
    color: var(--orange);
}

.star-map-panel {
    position: relative;
    aspect-ratio: 16/9;
    border-radius: 12px;
    overflow: hidden;
    background: var(--gray-light);
}

.star-map-media {
    width: 100%;
    height: 100%;
}

.star-map-media img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.orbit-nodes {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

.orbit-node {
    position: absolute;
    width: 80px;
    height: 80px;
    border: 2px solid var(--blue-trust);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
    color: var(--white);
    background: var(--blue-trust);
    opacity: 0.8;
}

.orbit-1 {
    top: 5%;
    left: 5%;
}

.orbit-2 {
    top: 5%;
    right: 5%;
}

.orbit-3 {
    bottom: 5%;
    left: 5%;
}

.orbit-4 {
    bottom: 5%;
    right: 5%;
}

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

.status-block {
    padding: 20px;
    background: var(--white);
    border: 1px solid var(--gray-border);
    border-radius: 8px;
    text-align: center;
    transition: all var(--transition);
}

.status-block:hover {
    border-color: var(--blue-trust);
    box-shadow: 0 4px 12px rgba(0, 102, 204, 0.1);
}

.status-label {
    font-size: 16px;
    font-weight: 600;
    color: var(--blue-trust);
    margin-bottom: 8px;
}

.status-desc {
    font-size: 14px;
    color: var(--gray-text);
}

/* ========== 通用模块样式 ========== */
.module {
    padding: 80px 16px;
    border-bottom: 1px solid var(--gray-border);
}

.module h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 40px;
    color: #000;
    text-align: center;
}

/* ========== 模块一：多链坐标定位 ========== */
.coordinate-locator {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

.coordinate-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.coordinate-point {
    padding: 24px;
    background: var(--gray-light);
    border: 2px solid var(--gray-border);
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    color: var(--blue-trust);
    cursor: pointer;
    transition: all var(--transition);
}

.coordinate-point:hover {
    border-color: var(--blue-trust);
    background: var(--blue-light);
    transform: translateY(-2px);
}

.coordinate-point.active {
    border-color: var(--blue-trust);
    background: var(--blue-trust);
    color: var(--white);
}

.coordinate-explanation {
    padding: 24px;
    background: var(--gray-light);
    border-radius: 8px;
}

.explanation-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--blue-trust);
    margin-bottom: 12px;
}

.explanation-content {
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-text);
    margin-bottom: 16px;
}

.explanation-tips {
    margin-bottom: 20px;
}

.tip-item {
    font-size: 14px;
    color: var(--green);
    margin-bottom: 8px;
}

.coordinate-media {
    border-radius: 8px;
    overflow: hidden;
    background: var(--gray-light);
}

.coordinate-media img {
    width: 100%;
    height: auto;
}

/* ========== 模块二：钱包轨道环 ========== */
.orbit-ring {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

.orbit-center {
    grid-column: 1;
    font-size: 24px;
    font-weight: 700;
    color: var(--blue-trust);
    text-align: center;
    margin-bottom: 20px;
}

.orbit-buttons {
    grid-column: 1;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.orbit-button {
    padding: 16px;
    background: var(--gray-light);
    border: 2px solid var(--gray-border);
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--blue-trust);
    cursor: pointer;
    transition: all var(--transition);
    text-align: center;
}

.orbit-button:hover {
    border-color: var(--blue-trust);
    background: var(--blue-light);
    transform: translateY(-2px);
}

.orbit-button.active {
    border-color: var(--blue-trust);
    background: var(--blue-trust);
    color: var(--white);
}

.orbit-explanation {
    grid-column: 2;
    grid-row: 1 / 3;
    padding: 24px;
    background: var(--gray-light);
    border-radius: 8px;
}

.orbit-explanation .explanation-title {
    margin-bottom: 12px;
}

.orbit-explanation .explanation-content {
    margin-bottom: 20px;
}

.orbit-media {
    border-radius: 8px;
    overflow: hidden;
    background: var(--gray-light);
}

.orbit-media img {
    width: 100%;
    height: auto;
}

/* ========== 模块三：资产航线板 ========== */
.asset-route {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

.route-items {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.route-item {
    flex: 1;
}

.route-button {
    width: 100%;
    padding: 16px;
    background: var(--gray-light);
    border: 2px solid var(--gray-border);
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 16px;
    font-weight: 600;
    color: var(--blue-trust);
    cursor: pointer;
    transition: all var(--transition);
    text-align: left;
}

.route-button:hover {
    border-color: var(--blue-trust);
    background: var(--blue-light);
}

.route-button.active {
    border-color: var(--blue-trust);
    background: var(--blue-trust);
    color: var(--white);
}

.route-number {
    font-size: 18px;
    font-weight: 700;
}

.route-name {
    flex: 1;
}

.route-tag {
    font-size: 12px;
    background: var(--orange);
    color: var(--white);
    padding: 4px 8px;
    border-radius: 3px;
}

.route-button.active .route-tag {
    background: rgba(255, 255, 255, 0.3);
}

.route-connector {
    height: 1px;
    background: linear-gradient(90deg, var(--gray-border), transparent);
    margin: 0;
}

.route-details {
    padding: 16px;
    background: var(--blue-light);
    border-radius: 6px;
    margin-top: 8px;
    animation: fadeIn 0.3s ease-out;
}

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

.detail-text {
    font-size: 14px;
    color: var(--gray-text);
    line-height: 1.6;
}

.route-media {
    border-radius: 8px;
    overflow: hidden;
    background: var(--gray-light);
}

.route-media img {
    width: 100%;
    height: auto;
}

/* ========== 模块四：安全航道 ========== */
.security-route {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

.security-checks {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.security-point {
    padding: 20px;
    background: var(--gray-light);
    border: 2px solid var(--gray-border);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    transition: all var(--transition);
}

.security-point:hover {
    border-color: var(--blue-trust);
    background: var(--blue-light);
    transform: translateY(-2px);
}

.security-point.active {
    border-color: var(--blue-trust);
    background: var(--blue-trust);
}

.check-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
    background: rgba(0, 102, 204, 0.1);
    color: var(--blue-trust);
}

.security-point.active .check-icon {
    background: rgba(255, 255, 255, 0.3);
    color: var(--white);
}

.check-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--blue-trust);
    text-align: center;
}

.security-point.active .check-name {
    color: var(--white);
}

.security-explanation {
    padding: 24px;
    background: var(--gray-light);
    border-radius: 8px;
}

.security-result {
    margin-bottom: 20px;
}

.result-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--blue-trust);
    margin-bottom: 8px;
}

.result-risk {
    font-size: 14px;
    color: var(--orange);
    font-weight: 600;
    margin-bottom: 12px;
}

.result-reason {
    font-size: 14px;
    color: var(--gray-text);
    line-height: 1.6;
    margin-bottom: 12px;
}

.result-action {
    font-size: 14px;
    color: var(--green);
    font-weight: 500;
}

.security-media {
    border-radius: 8px;
    overflow: hidden;
    background: var(--gray-light);
}

.security-media img {
    width: 100%;
    height: auto;
}

/* ========== 模块五：App 星窗 ========== */
.app-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.app-preview-main {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.preview-media {
    aspect-ratio: 9/16;
    background: var(--gray-light);
    border-radius: 12px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 300px;
    margin: 0 auto;
}

.preview-media img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.app-screenshot {
    display: none;
}

.app-screenshot.active {
    display: block;
    animation: fadeIn 0.3s ease-out;
}

.app-dots {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.app-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--gray-border);
    border: none;
    cursor: pointer;
    transition: all var(--transition);
}

.app-dot.active {
    background: var(--blue-trust);
    transform: scale(1.3);
}

.app-description {
    padding: 24px;
    background: var(--gray-light);
    border-radius: 8px;
}

.app-desc-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--blue-trust);
    margin-bottom: 12px;
}

.app-desc-text {
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-text);
}

/* ========== 模块六：场景导航星盘 ========== */
.scenario-wheel {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

.scenario-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.scenario-button {
    padding: 20px;
    background: var(--gray-light);
    border: 2px solid var(--gray-border);
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    color: var(--blue-trust);
    cursor: pointer;
    transition: all var(--transition);
    text-align: center;
}

.scenario-button:hover {
    border-color: var(--blue-trust);
    background: var(--blue-light);
    transform: translateY(-2px);
}

.scenario-button.active {
    border-color: var(--blue-trust);
    background: var(--blue-trust);
    color: var(--white);
}

.scenario-result {
    padding: 24px;
    background: var(--gray-light);
    border-radius: 8px;
}

.result-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--blue-trust);
    margin-bottom: 12px;
}

.result-path {
    font-size: 14px;
    color: var(--gray-text);
    line-height: 1.6;
    margin-bottom: 20px;
    padding: 12px;
    background: var(--white);
    border-left: 3px solid var(--blue-trust);
    border-radius: 4px;
}

.scenario-media {
    border-radius: 8px;
    overflow: hidden;
    background: var(--gray-light);
}

.scenario-media img {
    width: 100%;
    height: auto;
}

/* ========== 模块七：校准星 ========== */
.calibration-star {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 40px;
}

.star-points {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.star-point {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    border: 3px solid var(--gray-border);
    background: var(--gray-light);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition);
    font-weight: 600;
    color: var(--blue-trust);
}

.star-point:hover {
    border-color: var(--blue-trust);
    background: var(--blue-light);
    transform: scale(1.1);
}

.star-point.active {
    border-color: var(--blue-trust);
    background: var(--blue-trust);
    color: var(--white);
    box-shadow: 0 0 20px rgba(0, 102, 204, 0.3);
}

.point-text {
    font-size: 16px;
}

.star-message {
    padding: 20px;
    background: var(--green);
    color: var(--white);
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    text-align: center;
    opacity: 0;
    transition: opacity var(--transition);
}

.star-message.show {
    opacity: 1;
}

/* ========== 模块八：FAQ ========== */
.faq-station {
    max-width: 800px;
    margin: 0 auto;
}

.faq-categories {
    display: flex;
    gap: 16px;
    margin-bottom: 40px;
    justify-content: center;
    flex-wrap: wrap;
}

.faq-category {
    padding: 10px 24px;
    border: 2px solid var(--gray-border);
    background: var(--white);
    border-radius: 24px;
    font-size: 14px;
    font-weight: 600;
    color: var(--blue-trust);
    cursor: pointer;
    transition: all var(--transition);
}

.faq-category:hover {
    border-color: var(--blue-trust);
    background: var(--blue-light);
}

.faq-category.active {
    border-color: var(--blue-trust);
    background: var(--blue-trust);
    color: var(--white);
}

.faq-content {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.faq-group {
    display: none;
}

.faq-group.active {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.faq-item {
    border-bottom: 1px solid var(--gray-border);
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    width: 100%;
    padding: 20px;
    background: var(--white);
    border: none;
    text-align: left;
    font-size: 16px;
    font-weight: 600;
    color: var(--blue-trust);
    cursor: pointer;
    transition: all var(--transition);
    position: relative;
    padding-right: 40px;
}

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

.faq-question::after {
    content: '+';
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 24px;
    font-weight: 300;
}

.faq-question.active::after {
    content: '−';
}

.faq-answer {
    padding: 0 20px;
    background: var(--gray-light);
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
        max-height: 0;
    }
    to {
        opacity: 1;
        transform: translateY(0);
        max-height: 500px;
    }
}

.answer-text {
    padding: 20px 0;
    font-size: 15px;
    line-height: 1.7;
    color: var(--gray-text);
}

/* ========== Footer ========== */
.footer {
    background: var(--blue-dark);
    color: var(--white);
    padding: 60px 16px 20px;
}

.footer .container {
    width: 100%;
}

.footer-main {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    gap: 16px;
}

.footer-logo-img {
    width: 60px;
    height: 60px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.brand-name {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 4px;
}

.brand-desc {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

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

.index-title,
.warning-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 12px;
}

.index-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.index-list a {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    transition: color var(--transition);
}

.index-list a:hover {
    color: var(--white);
}

.warning-text {
    font-size: 14px;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.8);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.disclaimer-title {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
}

.disclaimer-text {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

.footer-copyright {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.7);
}

/* ========== 返回顶部 ========== */
.back-to-top {
    display: none;
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--blue-trust);
    color: var(--white);
    border: none;
    font-size: 24px;
    cursor: pointer;
    transition: all var(--transition);
    z-index: 500;
}

.back-to-top.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.back-to-top:hover {
    background: var(--blue-dark);
    transform: translateY(-3px);
}

/* ========== 图片预览 ========== */
.image-viewer {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.viewer-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
}

.viewer-content {
    position: relative;
    z-index: 2001;
    max-width: 90vw;
    max-height: 90vh;
    background: var(--white);
    border-radius: 8px;
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.viewer-close {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.3);
    color: var(--white);
    border: none;
    font-size: 24px;
    cursor: pointer;
    transition: all var(--transition);
    z-index: 2002;
}

.viewer-close:hover {
    background: rgba(0, 0, 0, 0.5);
}

.viewer-image {
    max-width: 100%;
    max-height: 80vh;
    object-fit: contain;
}

/* ========== 淡入动画 ========== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.module-fade-in {
    animation: fadeInUp 0.6s ease-out;
}

/* ========== 响应式设计 ========== */
@media (max-width: 1024px) {
    .header-position {
        display: none;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .hero h1 {
        font-size: 32px;
    }

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

    .coordinate-locator,
    .orbit-ring,
    .asset-route,
    .security-route,
    .app-showcase,
    .scenario-wheel {
        grid-template-columns: 1fr;
    }

    .orbit-explanation {
        grid-column: auto;
        grid-row: auto;
    }

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

    .security-checks {
        grid-template-columns: repeat(3, 1fr);
    }

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

    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
    }

    .module h2 {
        font-size: 26px;
    }

    .module {
        padding: 60px 16px;
    }

    .hero {
        padding: 40px 16px;
    }
}

@media (max-width: 768px) {
    .header-actions {
        display: none;
    }

    .menu-toggle {
        display: block;
    }

    .hero h1 {
        font-size: 26px;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-buttons .btn {
        width: 100%;
    }

    .hero-status {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .status-block {
        padding: 16px;
    }

    .status-label {
        font-size: 14px;
    }

    .status-desc {
        font-size: 12px;
    }

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

    .coordinate-point {
        padding: 16px;
        font-size: 14px;
    }

    .coordinate-explanation {
        padding: 16px;
    }

    .orbit-buttons {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .orbit-button {
        padding: 12px;
        font-size: 12px;
    }

    .route-button {
        padding: 12px;
        font-size: 14px;
    }

    .security-checks {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .security-point {
        padding: 16px;
    }

    .check-icon {
        width: 40px;
        height: 40px;
        font-size: 18px;
    }

    .check-name {
        font-size: 12px;
    }

    .star-points {
        gap: 12px;
    }

    .star-point {
        width: 80px;
        height: 80px;
        font-size: 14px;
    }

    .scenario-buttons {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .scenario-button {
        padding: 16px;
        font-size: 14px;
    }

    .faq-categories {
        gap: 12px;
    }

    .faq-category {
        padding: 8px 16px;
        font-size: 12px;
    }

    .faq-question {
        padding: 16px;
        font-size: 14px;
    }

    .module h2 {
        font-size: 22px;
        margin-bottom: 30px;
    }

    .module {
        padding: 40px 16px;
    }

    .back-to-top {
        width: 44px;
        height: 44px;
        bottom: 20px;
        right: 20px;
        font-size: 20px;
    }
}

@media (max-width: 375px) {
    html {
        font-size: 15px;
    }

    .hero {
        padding: 30px 16px;
    }

    .hero h1 {
        font-size: 22px;
    }

    .hero-description {
        font-size: 14px;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }

    .hero-status {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .status-block {
        padding: 12px;
    }

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

    .coordinate-point {
        padding: 12px;
        font-size: 12px;
    }

    .orbit-buttons {
        grid-template-columns: 1fr;
    }

    .orbit-button {
        padding: 10px;
        font-size: 11px;
    }

    .security-checks {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .security-point {
        padding: 12px;
        flex-direction: row;
        gap: 12px;
    }

    .check-icon {
        width: 36px;
        height: 36px;
        font-size: 16px;
        flex-shrink: 0;
    }

    .check-name {
        font-size: 11px;
        text-align: left;
        flex: 1;
    }

    .star-point {
        width: 70px;
        height: 70px;
        font-size: 12px;
    }

    .module h2 {
        font-size: 18px;
        margin-bottom: 24px;
    }

    .module {
        padding: 30px 16px;
    }

    .faq-question {
        padding: 14px;
        font-size: 13px;
    }

    .answer-text {
        font-size: 13px;
        padding: 16px 0;
    }
}