/* ============================================
   HYW-001 海卫一号 官网样式
   科技感 · 深蓝主题 · 中英双语
   ============================================ */

:root {
    --bg-primary: #0a0f1a;
    --bg-secondary: #0d1321;
    --bg-card: rgba(13, 19, 33, 0.7);
    --bg-card-hover: rgba(20, 30, 55, 0.85);
    --text-primary: #e8ecf1;
    --text-secondary: #8b9bb4;
    --text-muted: #5a6a82;
    --accent: #00d4ff;
    --accent-dim: rgba(0, 212, 255, 0.15);
    --accent-glow: rgba(0, 212, 255, 0.4);
    --border: rgba(0, 212, 255, 0.1);
    --border-hover: rgba(0, 212, 255, 0.3);
    --danger: #ff4757;
    --success: #2ed573;
    --gradient-start: #00d4ff;
    --gradient-end: #0077ff;
    --font-main: 'Inter', 'Noto Sans SC', -apple-system, sans-serif;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --radius: 12px;
    --radius-sm: 6px;
}

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

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

body {
    font-family: var(--font-main);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

/* ============================================
   LOADER
   ============================================ */
#loader {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s, visibility 0.5s;
}
#loader.hidden { opacity: 0; visibility: hidden; }
.loader-content { text-align: center; }
.loader-ring {
    width: 60px; height: 60px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loader-text {
    font-size: 14px;
    color: var(--text-secondary);
    letter-spacing: 4px;
    text-transform: uppercase;
}

/* ============================================
   NAVIGATION
   ============================================ */
#navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    padding: 0 24px;
    transition: background var(--transition), backdrop-filter var(--transition), box-shadow var(--transition);
}
#navbar.scrolled {
    background: rgba(10, 15, 26, 0.85);
    backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 var(--border);
}
.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
}
.logo-icon { font-size: 24px; }
.logo-main {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 1px;
}
.logo-sub {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 400;
    margin-left: 4px;
    opacity: 0.7;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}
.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color var(--transition);
    position: relative;
    padding: 4px 0;
}
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 0; height: 2px;
    background: var(--accent);
    transition: width var(--transition);
    border-radius: 2px;
}
.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
}
.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

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

.lang-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 13px;
    font-family: var(--font-main);
    transition: all var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}
.lang-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}
.lang-current { color: var(--accent); font-weight: 600; }
.lang-separator { opacity: 0.4; }

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
    padding: 4px;
}
.menu-toggle span {
    display: block;
    width: 24px; height: 2px;
    background: var(--text-primary);
    transition: all var(--transition);
    border-radius: 1px;
}
.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

#mobile-menu {
    position: fixed;
    top: 70px; left: 0; right: 0;
    background: rgba(10, 15, 26, 0.98);
    backdrop-filter: blur(20px);
    z-index: 999;
    transform: translateY(-100%);
    opacity: 0;
    transition: all var(--transition);
    pointer-events: none;
    border-bottom: 1px solid var(--border);
}
#mobile-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
}
.mobile-nav-links {
    list-style: none;
    padding: 20px 24px;
}
.mobile-nav-links a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 12px 0;
    font-size: 16px;
    border-bottom: 1px solid var(--border);
    transition: color var(--transition);
}
.mobile-nav-links a:hover { color: var(--accent); }

/* ============================================
   HERO
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 120px 24px 80px;
    overflow: hidden;
}
.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}
.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}
.hero-glow {
    position: absolute;
    width: 600px; height: 600px;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    background: radial-gradient(circle, rgba(0, 212, 255, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    animation: pulse-glow 4s ease-in-out infinite;
}
@keyframes pulse-glow {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.6; }
    50% { transform: translate(-50%, -50%) scale(1.1); opacity: 1; }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    animation: fade-in-up 0.8s ease-out;
}
@keyframes fade-in-up {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--accent-dim);
    border: 1px solid var(--border);
    padding: 6px 16px;
    border-radius: 100px;
    font-size: 13px;
    color: var(--accent);
    margin-bottom: 32px;
    letter-spacing: 1px;
}
.badge-dot {
    width: 6px; height: 6px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
}
.hero-title .title-line {
    display: block;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-title .title-line.sub {
    font-size: 0.5em;
    font-weight: 400;
    color: var(--text-secondary);
    -webkit-text-fill-color: var(--text-secondary);
    background: none;
    margin-top: 8px;
    letter-spacing: 2px;
}

.hero-desc {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 48px;
    line-height: 1.7;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}
.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}
.stat-num {
    font-size: 42px;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
    font-variant-numeric: tabular-nums;
}
.stat-unit {
    font-size: 16px;
    color: var(--accent);
    font-weight: 500;
    margin-left: 2px;
}
.stat-label {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 4px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    font-family: var(--font-main);
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition);
    border: none;
    letter-spacing: 0.5px;
}
.btn svg { flex-shrink: 0; }

.btn-primary {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: #fff;
    box-shadow: 0 4px 20px var(--accent-glow);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px var(--accent-glow);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
}
.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-dim);
}

.btn-large { padding: 16px 40px; font-size: 16px; }

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
}
.scroll-indicator {
    width: 24px; height: 40px;
    border: 2px solid var(--border);
    border-radius: 12px;
    position: relative;
}
.scroll-indicator span {
    position: absolute;
    top: 8px; left: 50%;
    transform: translateX(-50%);
    width: 4px; height: 8px;
    background: var(--accent);
    border-radius: 2px;
    animation: scroll-bounce 2s ease-in-out infinite;
}
@keyframes scroll-bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); opacity: 1; }
    50% { transform: translateX(-50%) translateY(8px); opacity: 0.3; }
}

/* ============================================
   SECTIONS COMMON
   ============================================ */
section { padding: 100px 0; position: relative; }

.section-header {
    text-align: center;
    margin-bottom: 64px;
}
.section-header.light .section-title { color: var(--text-primary); }
.section-header.light .section-desc { color: var(--text-secondary); }

.section-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 16px;
    background: var(--accent-dim);
    padding: 4px 14px;
    border-radius: 100px;
}
.section-title {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}
.section-desc {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================
   PRODUCTS
   ============================================ */
.products { background: var(--bg-secondary); }

.product-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    margin-bottom: 64px;
}

.product-visual { position: relative; }
.product-card {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
}
.product-card-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.05), rgba(0, 119, 255, 0.05));
    border: 1px solid var(--border);
    border-radius: var(--radius);
}
.product-image-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: var(--text-muted);
}
.placeholder-icon { font-size: 48px; opacity: 0.6; }
.product-image-placeholder span { font-size: 14px; }

.product-details { display: flex; flex-direction: column; gap: 32px; }
.detail-group h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--accent);
}
.detail-list { display: flex; flex-direction: column; gap: 12px; }
.detail-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}
.detail-item:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}
.detail-icon {
    font-size: 18px;
    width: 28px;
    flex-shrink: 0;
    text-align: center;
}
.detail-item strong {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
}
.detail-item span {
    font-size: 13px;
    color: var(--text-secondary);
}

.product-features {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    transition: all var(--transition);
}
.feature-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}
.feature-icon {
    font-size: 36px;
    margin-bottom: 16px;
}
.feature-card h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}
.feature-card p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   SPECS
   ============================================ */
.specs { background: var(--bg-primary); }

.specs-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.spec-category {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    transition: all var(--transition);
}
.spec-category:hover {
    border-color: var(--border-hover);
}
.spec-category h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}
.spec-cat-num {
    font-size: 12px;
    font-weight: 700;
    color: var(--accent);
    font-family: 'Inter', monospace;
}
.spec-table { width: 100%; border-collapse: collapse; }
.spec-table td {
    padding: 8px 0;
    font-size: 13px;
    border-bottom: 1px solid rgba(0, 212, 255, 0.05);
    vertical-align: top;
}
.spec-table td:first-child {
    color: var(--text-muted);
    width: 45%;
    padding-right: 12px;
}
.spec-table td:last-child { color: var(--text-primary); font-weight: 500; }
.spec-table tr:last-child td { border-bottom: none; }

/* ============================================
   INDUSTRY
   ============================================ */
.industry {
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.industry-overview {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 64px;
}
.overview-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    text-align: center;
    transition: all var(--transition);
}
.overview-card:hover {
    border-color: var(--accent);
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.1);
}
.overview-num {
    font-size: 48px;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
    font-variant-numeric: tabular-nums;
}
.overview-num span { font-size: 20px; margin-left: 4px; }
.overview-card p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 12px;
}

.industry-content { display: flex; flex-direction: column; gap: 48px; }
.industry-block h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 12px;
}
.industry-block h3::before {
    content: '';
    width: 4px; height: 24px;
    background: var(--accent);
    border-radius: 2px;
}

.driver-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}
.driver-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}
.driver-item:hover {
    border-color: var(--border-hover);
}
.driver-item::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 3px; height: 100%;
    background: linear-gradient(180deg, var(--accent), transparent);
}
.driver-num {
    font-size: 32px;
    font-weight: 700;
    color: rgba(0, 212, 255, 0.15);
    position: absolute;
    top: 12px; right: 16px;
    font-family: 'Inter', monospace;
}
.driver-item h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}
.driver-item p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.competitor-table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}
.competitor-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}
.competitor-table th {
    background: var(--bg-card-hover);
    color: var(--text-primary);
    font-weight: 600;
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}
.competitor-table td {
    padding: 14px 16px;
    border-bottom: 1px solid rgba(0, 212, 255, 0.05);
    color: var(--text-secondary);
    vertical-align: top;
}
.competitor-table tbody tr:hover {
    background: rgba(0, 212, 255, 0.03);
}
.competitor-table .highlight-row {
    background: rgba(0, 212, 255, 0.05);
}
.competitor-table .highlight-row td:first-child {
    color: var(--accent);
    font-weight: 600;
}
.competitor-table strong { color: var(--text-primary); }
.competitor-table small { font-size: 11px; color: var(--text-muted); }

/* ============================================
   CASES
   ============================================ */
.cases { background: var(--bg-secondary); }

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}
.case-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all var(--transition);
}
.case-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}
.case-header {
    padding: 24px 24px 0;
}
.case-tag {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    color: var(--accent);
    background: var(--accent-dim);
    padding: 3px 10px;
    border-radius: 100px;
    margin-bottom: 12px;
    letter-spacing: 1px;
}
.case-header h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
}
.case-body { padding: 20px 24px 24px; }
.case-meta {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}
.case-meta-item {
    text-align: center;
}
.meta-label {
    display: block;
    font-size: 11px;
    color: var(--text-muted);
    margin-bottom: 4px;
}
.meta-value {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}
.case-quote {
    position: relative;
    padding-left: 16px;
    border-left: 2px solid var(--accent);
    font-style: italic;
}
.quote-mark {
    font-size: 24px;
    color: var(--accent);
    opacity: 0.3;
    position: absolute;
    top: -8px; left: -4px;
    font-family: serif;
}
.case-quote p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.partnership {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    text-align: center;
}
.partnership h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}
.partner-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}
.partner-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--accent);
}
.partner-desc {
    font-size: 13px;
    color: var(--text-secondary);
    max-width: 500px;
}

/* ============================================
   CONTACT
   ============================================ */
.contact { background: linear-gradient(180deg, var(--bg-primary) 0%, #060a12 100%); }

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}
.contact-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}
.contact-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    transition: all var(--transition);
}
.contact-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}
.contact-icon {
    font-size: 24px;
    margin-bottom: 10px;
}
.contact-card h4 {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 6px;
}
.contact-card p {
    font-size: 14px;
    color: var(--text-primary);
    line-height: 1.5;
    word-break: break-word;
}

.cta-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px;
    position: relative;
    overflow: hidden;
}
.cta-box::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--gradient-start), var(--gradient-end));
}
.cta-box h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
}
.price-highlight {
    display: flex;
    align-items: baseline;
    gap: 8px;
    margin-bottom: 8px;
}
.price-num {
    font-size: 56px;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
    font-variant-numeric: tabular-nums;
}
.price-unit {
    font-size: 18px;
    color: var(--text-secondary);
    font-weight: 500;
}
.price-note {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}
.price-features {
    list-style: none;
    margin-bottom: 24px;
}
.price-features li {
    font-size: 14px;
    color: var(--text-secondary);
    padding: 8px 0;
    border-bottom: 1px solid rgba(0, 212, 255, 0.05);
    display: flex;
    align-items: center;
    gap: 10px;
}
.price-features li::before {
    content: '✓';
    color: var(--success);
    font-weight: 700;
    flex-shrink: 0;
}
.cta-buttons { display: flex; gap: 12px; }
.rental-note {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 16px;
    text-align: center;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: #060a12;
    border-top: 1px solid var(--border);
    padding: 40px 0;
}
.footer-content { text-align: center; }
.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 12px;
}
.footer-logo { font-size: 24px; }
.footer-name {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}
.footer-desc {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}
.footer-copy {
    font-size: 12px;
    color: var(--text-muted);
}

/* ============================================
   RESPONSIVE
   ============================================ */

/* Tablet (≤1024px) */
@media (max-width: 1024px) {
    .specs-grid { grid-template-columns: repeat(2, 1fr); }
    .product-showcase { grid-template-columns: 1fr; }
    .product-visual { order: -1; }
    .contact-grid { grid-template-columns: 1fr; }
    .contact-info { grid-template-columns: repeat(2, 1fr); }
    .product-diag-inner,
    .tech-diagram-inner { grid-template-columns: 1fr; gap: 32px; }
    .product-diag-text,
    .tech-diagram-text { text-align: center; }
    .product-diag-text .section-tag,
    .tech-diagram-text .section-tag { align-self: center; }
}

/* Mobile (≤768px) */
@media (max-width: 768px) {
    /* Nav */
    .nav-links { display: none; }
    .menu-toggle { display: flex; }
    .nav-container { height: 60px; }
    #mobile-menu { top: 60px; }

    /* Hero */
    .hero { padding: 100px 20px 60px; min-height: auto; }
    .hero-badge { font-size: 11px; margin-bottom: 20px; }
    .hero-desc { font-size: 15px; margin-bottom: 32px; }
    .hero-stats { gap: 20px; flex-wrap: wrap; }
    .stat-item { min-width: 80px; }
    .stat-num { font-size: 32px; }
    .stat-unit { font-size: 14px; }
    .stat-label { font-size: 11px; }
    .hero-cta { flex-direction: column; align-items: stretch; gap: 12px; }
    .btn { width: 100%; justify-content: center; padding: 12px 24px; }
    .btn-large { padding: 14px 28px; font-size: 15px; }
    .hero-scroll { display: none; }

    /* Sections */
    section { padding: 60px 0; }
    .section-header { margin-bottom: 40px; }
    .section-title { font-size: 1.5rem; }
    .section-desc { font-size: 14px; }

    /* Product */
    .product-showcase { gap: 32px; margin-bottom: 40px; }
    .product-card { width: 100%; }
    .detail-group h3 { font-size: 16px; }
    .detail-item { padding: 10px 12px; }
    .detail-icon { font-size: 16px; width: 24px; }
    .detail-item strong { font-size: 12px; }
    .detail-item span { font-size: 12px; }
    .product-features { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .feature-card { padding: 20px 12px; }
    .feature-icon { font-size: 28px; margin-bottom: 10px; }
    .feature-card h4 { font-size: 14px; }
    .feature-card p { font-size: 12px; }

    /* Specs */
    .specs-grid { grid-template-columns: 1fr; gap: 16px; }
    .spec-category { padding: 16px; }
    .spec-category h3 { font-size: 14px; margin-bottom: 12px; }
    .spec-table td { font-size: 12px; padding: 6px 0; }

    /* Industry */
    .industry-overview { grid-template-columns: 1fr; gap: 16px; margin-bottom: 40px; }
    .overview-card { padding: 24px; }
    .overview-num { font-size: 36px; }
    .overview-num span { font-size: 16px; }
    .driver-grid { grid-template-columns: 1fr; gap: 16px; }
    .driver-item { padding: 20px; }
    .driver-num { font-size: 24px; }
    .driver-item h4 { font-size: 14px; }
    .driver-item p { font-size: 12px; }
    .industry-block h3 { font-size: 16px; margin-bottom: 16px; }

    /* Cases */
    .cases-grid { grid-template-columns: 1fr; gap: 16px; margin-bottom: 32px; }
    .case-header { padding: 16px 16px 0; }
    .case-header h3 { font-size: 14px; }
    .case-body { padding: 16px; }
    .case-meta { grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 16px; padding-bottom: 12px; }
    .meta-label { font-size: 10px; }
    .meta-value { font-size: 12px; }
    .case-quote p { font-size: 12px; }
    .partnership { padding: 24px; }
    .partnership h3 { font-size: 16px; }
    .partner-name { font-size: 14px; }
    .partner-desc { font-size: 12px; }

    /* Contact */
    .contact-grid { gap: 32px; }
    .contact-info { grid-template-columns: 1fr; gap: 12px; }
    .contact-card { padding: 16px; }
    .contact-icon { font-size: 20px; }
    .contact-card h4 { font-size: 11px; }
    .contact-card p { font-size: 13px; }
    .cta-box { padding: 24px; }
    .cta-box h3 { font-size: 16px; margin-bottom: 12px; }
    .price-note { margin-bottom: 16px; padding-bottom: 12px; }
    .price-features li { font-size: 12px; padding: 6px 0; }
    .cta-buttons { flex-direction: column; }
    .rental-note { font-size: 11px; }

    /* Diagram sections */
    .product-diag, .tech-diagram { margin-top: 40px; padding-top: 24px; }
    .product-diag-inner,
    .tech-diagram-inner { gap: 24px; }
    .product-diag-text h2,
    .tech-diagram-text h2 { font-size: 1.4rem; }
    .product-diag-text p,
    .tech-diagram-text p { font-size: 13px; }
    .product-diag .diag-img-wrapper,
    .tech-diagram .diag-img-wrapper { padding: 16px; }
    .product-diag .diag-img-wrapper .diag-img,
    .tech-diagram .diag-img-wrapper .diag-img { max-height: 70vh; }

    /* Table */
    .competitor-table-wrapper { overflow-x: auto; -webkit-overflow-scrolling: touch; }
    .competitor-table { font-size: 11px; min-width: 500px; }
    .competitor-table th,
    .competitor-table td { padding: 8px 10px; }

    /* Footer */
    .footer { padding: 24px 0; }
    .footer-name { font-size: 16px; }
    .footer-desc { font-size: 12px; }
    .footer-copy { font-size: 11px; }

    /* Cursor glow off on mobile */
    .cursor-glow { display: none; }
}

/* Small Mobile (≤480px) */
@media (max-width: 480px) {
    .container { padding: 0 16px; }
    .hero { padding: 90px 16px 50px; }
    .hero-title { font-size: 2.2rem; }
    .hero-title .title-line.sub { font-size: 0.45em; }
    .stat-num { font-size: 28px; }
    .product-features { grid-template-columns: 1fr; }
    .section-title { font-size: 1.3rem; }
    .overview-num { font-size: 32px; }
    .diag-img-wrapper { padding: 12px; }
    .product-diag .diag-img-wrapper .diag-img,
    .tech-diagram .diag-img-wrapper .diag-img { max-height: 65vh; }
    .case-meta { grid-template-columns: 1fr 1fr; }
    .case-meta-item:nth-child(3) { grid-column: span 2; }
}

/* 二级标题 — 静态展开，无交互 */
.industry-block .accordion-toggle,
.industry-block .accordion-toggle.active {
    display: block;
    padding: 0;
    background: transparent;
    border: none;
    cursor: default;
    margin-bottom: 20px;
    pointer-events: none;
}
.industry-block .accordion-toggle .accordion-icon {
    display: none;
}
.industry-block .accordion-content,
.industry-block .accordion-content.open {
    max-height: none;
    overflow: visible;
    opacity: 1;
    padding: 0;
    transition: none;
}

/* ============================================
   TECH ROUTE COMPARISON TABLE
   ============================================ */

.tech-route-block { margin-bottom: 24px; }
.accordion-desc {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    padding: 0 4px;
}
.tech-route-table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    margin-bottom: 24px;
    -webkit-overflow-scrolling: touch;
}
.tech-route-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    min-width: 700px;
}
.tech-route-table th {
    background: var(--bg-card-hover);
    color: var(--text-primary);
    font-weight: 600;
    padding: 14px 12px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}
.tech-route-table td {
    padding: 12px;
    border-bottom: 1px solid rgba(0, 212, 255, 0.05);
    color: var(--text-secondary);
    vertical-align: top;
}
.tech-route-table td:first-child {
    color: var(--text-primary);
    font-weight: 600;
    background: rgba(0, 212, 255, 0.03);
    white-space: nowrap;
}
.tech-route-table td.highlight {
    color: var(--accent);
    font-weight: 600;
    background: rgba(0, 212, 255, 0.05);
}
.tech-route-table tbody tr:hover {
    background: rgba(0, 212, 255, 0.02);
}
.tech-route-table tbody tr:last-child td { border-bottom: none; }

.tech-route-summary {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
}
.route-advantage { display: flex; flex-direction: column; gap: 12px; }
.route-tag {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--accent);
    background: var(--accent-dim);
    padding: 4px 12px;
    border-radius: 100px;
    align-self: flex-start;
}
.route-advantage p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ============================================
   ECOLOGY / DOCKYARD RECONSTRUCTION
   ============================================ */

.ecology-block { margin-bottom: 24px; }
.ecology-hero {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.08), rgba(0, 119, 255, 0.05));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    margin-bottom: 24px;
    text-align: center;
}
.ecology-hero h4 {
    font-size: 22px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 12px;
    letter-spacing: 1px;
}
.ecology-hero p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 700px;
    margin: 0 auto;
}
.ecology-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.ecology-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}
.ecology-item:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}
.ecology-item::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 3px;
    background: linear-gradient(90deg, var(--gradient-start), var(--gradient-end));
}
.eco-num {
    font-size: 28px;
    font-weight: 700;
    color: rgba(0, 212, 255, 0.15);
    font-family: 'Inter', monospace;
    margin-bottom: 8px;
    display: block;
}
.ecology-item h5 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
}
.ecology-item p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
}

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

/* Mobile */
@media (max-width: 768px) {
    .accordion-toggle { padding: 12px 16px; font-size: 15px; }
    .accordion-content.open { padding: 16px; }
    .tech-route-table { font-size: 11px; min-width: 600px; }
    .tech-route-table th,
    .tech-route-table td { padding: 8px 10px; }
    .tech-route-summary { padding: 16px; }
    .route-advantage p { font-size: 13px; }
    .ecology-hero { padding: 24px; }
    .ecology-hero h4 { font-size: 18px; }
    .ecology-hero p { font-size: 13px; }
    .ecology-grid { grid-template-columns: 1fr; gap: 12px; }
    .ecology-item { padding: 20px; }
    .eco-num { font-size: 22px; }
    .ecology-item h5 { font-size: 14px; }
    .ecology-item p { font-size: 12px; }
}

/* ============================================
   SUB-NAV (二级导航)
   ============================================ */
.sub-nav {
    margin: 24px 0 32px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}
.sub-nav::-webkit-scrollbar { display: none; }
.sub-nav-inner {
    display: flex;
    gap: 12px;
    padding: 4px 0;
    min-width: max-content;
}
.sub-nav-inner a {
    display: inline-block;
    padding: 8px 20px;
    border-radius: 100px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    text-decoration: none;
    white-space: nowrap;
    transition: all var(--transition);
}
.sub-nav-inner a:hover {
    border-color: var(--border-hover);
    color: var(--text-primary);
    background: var(--bg-card-hover);
}
.sub-nav-inner a:active,
.sub-nav-inner a:focus {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(0, 212, 255, 0.08);
}

/* Mobile sub-nav */
@media (max-width: 768px) {
    .sub-nav { margin: 16px 0 24px; }
    .sub-nav-inner a { padding: 6px 14px; font-size: 12px; }
}

/* ============================================
   ANIMATED EFFECTS
   ============================================ */

/* Touch device optimizations */
@media (pointer: coarse) {
    .cursor-glow { display: none !important; }
    .feature-card:hover::before, .case-card:hover::before,
    .spec-category:hover::before, .overview-card:hover::before,
    .driver-item:hover::before, .contact-card:hover::before,
    .detail-item:hover::before, .product-card:hover::before,
    .cta-box:hover::before { display: none; }
    .feature-card:hover, .case-card:hover, .spec-category:hover,
    .overview-card:hover, .driver-item:hover, .contact-card:hover,
    .detail-item:hover, .product-card:hover, .cta-box:hover {
        box-shadow: none;
    }
}

/* Scroll Reveal — Float Up */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Image Float Up on Reveal */
.float-up {
    opacity: 0;
    transform: translateY(60px) scale(0.97);
    transition: opacity 0.9s cubic-bezier(0.22, 1, 0.36, 1),
                transform 0.9s cubic-bezier(0.22, 1, 0.36, 1);
}
.float-up.visible {
    opacity: 1;
    transform: translateY(0) scale(1);
}

/* Card Hover — Glow Border + Light Trail */
.feature-card, .case-card, .spec-category, .overview-card,
.driver-item, .contact-card, .detail-item, .product-card, .cta-box {
    position: relative;
    overflow: hidden;
}
.feature-card::before, .case-card::before, .spec-category::before,
.overview-card::before, .driver-item::before, .contact-card::before,
.detail-item::before, .product-card::before, .cta-box::before {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 100%; height: 100%;
    background: linear-gradient(90deg,
        transparent,
        rgba(0, 212, 255, 0.06),
        transparent
    );
    transition: left 0.6s ease;
    pointer-events: none;
    z-index: 0;
}
.feature-card:hover::before, .case-card:hover::before, .spec-category:hover::before,
.overview-card:hover::before, .driver-item:hover::before, .contact-card:hover::before,
.detail-item:hover::before, .product-card:hover::before, .cta-box:hover::before {
    left: 100%;
}

/* Hover Glow Ring */
.feature-card:hover, .case-card:hover, .spec-category:hover,
.overview-card:hover, .driver-item:hover, .contact-card:hover,
.detail-item:hover, .product-card:hover, .cta-box:hover {
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.15),
                0 0 60px rgba(0, 212, 255, 0.08),
                inset 0 0 20px rgba(0, 212, 255, 0.03);
}

/* Hero Tech Lines Background */
.hero-lines {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: 0;
    pointer-events: none;
}
.tech-line {
    position: absolute;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    height: 1px;
    opacity: 0;
    animation: line-scan 4s ease-in-out infinite;
}
.tech-line:nth-child(1) {
    top: 20%; left: -100%; width: 60%;
    animation-delay: 0s;
}
.tech-line:nth-child(2) {
    top: 35%; left: -100%; width: 40%;
    animation-delay: 1.2s;
}
.tech-line:nth-child(3) {
    top: 55%; left: -100%; width: 50%;
    animation-delay: 2.4s;
}
.tech-line:nth-child(4) {
    top: 70%; left: -100%; width: 35%;
    animation-delay: 0.8s;
}
.tech-line:nth-child(5) {
    top: 85%; left: -100%; width: 45%;
    animation-delay: 3.2s;
}
.tech-line.vertical {
    width: 1px;
    height: 60%;
    background: linear-gradient(180deg, transparent, var(--accent), transparent);
    top: -100%;
    animation: line-scan-vertical 5s ease-in-out infinite;
}
.tech-line.vertical:nth-child(6) {
    left: 15%; animation-delay: 0.5s;
}
.tech-line.vertical:nth-child(7) {
    left: 45%; animation-delay: 2s;
}
.tech-line.vertical:nth-child(8) {
    left: 80%; animation-delay: 3.5s;
}

@keyframes line-scan {
    0% { left: -100%; opacity: 0; }
    20% { opacity: 0.3; }
    50% { opacity: 0.5; }
    80% { opacity: 0.2; }
    100% { left: 200%; opacity: 0; }
}
@keyframes line-scan-vertical {
    0% { top: -100%; opacity: 0; }
    20% { opacity: 0.2; }
    50% { opacity: 0.4; }
    80% { opacity: 0.1; }
    100% { top: 200%; opacity: 0; }
}

/* Mouse Cursor Glow Trail */
.cursor-glow {
    position: fixed;
    width: 300px; height: 300px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.08) 0%, transparent 70%);
    pointer-events: none;
    z-index: 9998;
    transform: translate(-50%, -50%);
    transition: opacity 0.3s ease;
    opacity: 0;
}
body:hover .cursor-glow {
    opacity: 1;
}

/* Button Hover Light Sweep */
.btn-primary {
    position: relative;
    overflow: hidden;
}
.btn-primary::after {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 50%; height: 100%;
    background: linear-gradient(90deg,
        transparent,
        rgba(255, 255, 255, 0.2),
        transparent
    );
    transition: left 0.5s ease;
}
.btn-primary:hover::after {
    left: 150%;
}

/* Stat Counter Animation */
.stat-item .stat-num {
    display: inline-block;
}

/* Image Hover Zoom */
.product-img, .case-img, .diag-img {
    transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}
.product-card:hover .product-img {
    transform: scale(1.03);
}

/* Section Entrance Stagger */
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }
.reveal-delay-6 { transition-delay: 0.6s; }


/* Product Image */
.product-img {
    display: block;
    width: 100%;
    height: auto;
    object-fit: contain;
    border-radius: var(--radius);
}

/* 产品展示图 — 满尺寸高度显示 */
.product-card {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    /* 去掉固定比例，让图片自适应高度 */
}
.product-card .product-img {
    position: relative;
    inset: auto;
    width: 100%;
    height: auto;
    object-fit: contain;
    display: block;
}
.product-card-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.05), rgba(0, 119, 255, 0.05));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    z-index: -1;
}


/* Product & Tech Diagram Sections */
.product-diag, .tech-diagram {
    margin-top: 80px;
    padding-top: 40px;
    border-top: 1px solid var(--border);
}
.product-diag .section-header,
.tech-diagram .section-header {
    margin-bottom: 40px;
}

/* Product & Tech Diagram — Side Layout */
.product-diag-inner,
.tech-diagram-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.product-diag-text,
.tech-diagram-text {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.product-diag-text h2,
.tech-diagram-text h2 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}
.product-diag-text p,
.tech-diagram-text p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}
.product-diag-text .section-tag,
.tech-diagram-text .section-tag {
    align-self: flex-start;
}

/* 拆解图 & 技术图示 */
.product-diag .diag-img-wrapper,
.tech-diagram .diag-img-wrapper {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    overflow: hidden;
}
.product-diag .diag-img-wrapper .diag-img,
.tech-diagram .diag-img-wrapper .diag-img {
    width: 100%;
    height: auto;
    max-height: 80vh;
    object-fit: contain;
    display: block;
    border-radius: var(--radius-sm);
}

/* Contact — 4 cards */
.contact-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

/* Price highlight removed */


/* Case Image */
.case-img-wrapper {
    width: 100%;
    height: 180px;
    overflow: hidden;
    border-radius: var(--radius) var(--radius) 0 0;
}
.case-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.case-card .case-header {
    padding: 20px 24px 0;
}


/* Price hidden */
.price-highlight, .price-num, .price-unit { display: none !important; }