/* ============================================
   QG Capital 官网样式表
   ============================================ */

:root {
    --color-bg: #0a0e1a;
    --color-bg-alt: #0d1220;
    --color-bg-card: rgba(13, 18, 32, 0.85);
    --color-primary: #c9a84c;
    --color-primary-light: #e4c76a;
    --color-primary-dark: #a08030;
    --color-secondary: #1a3a5c;
    --color-accent: #4a9eff;
    --color-text: #f0f0f5;
    --color-text-secondary: #8892a4;
    --color-text-muted: #5a6478;
    --color-border: rgba(201, 168, 76, 0.2);
    --color-border-light: rgba(255, 255, 255, 0.06);
    --font-display: 'Playfair Display', Georgia, serif;
    --font-body: 'Inter', -apple-system, sans-serif;
    --font-mono: 'Orbitron', monospace;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    font-family: var(--font-body);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; display: block; }

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

canvas#particle-canvas {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 0;
    pointer-events: none;
}

.section {
    padding: 100px 0;
    position: relative;
    z-index: 1;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-label {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 4px;
    color: var(--color-primary);
    margin-bottom: 16px;
    text-transform: uppercase;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(28px, 4.5vw, 44px);
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--color-text);
    line-height: 1.2;
}

.section-desc {
    font-size: 16px;
    color: var(--color-text-secondary);
    max-width: 560px;
    margin: 0 auto;
    line-height: 1.8;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 15px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-family: var(--font-body);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #0a0e1a;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(201, 168, 76, 0.35);
}

.btn-outline {
    background: rgba(6, 10, 20, 0.6);
    color: var(--color-text);
    border: 1px solid rgba(201, 168, 76, 0.5);
}

.btn-outline:hover {
    background: rgba(201, 168, 76, 0.2);
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    height: 56px;
    padding: 0;
    background: #0a0e1a;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.navbar.scrolled {
    background: #0a0e1a;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.logo-img {
    height: 32px;
    width: auto;
    object-fit: contain;
    flex-shrink: 0;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-name {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
}

.logo-sub {
    font-size: 10px;
    color: var(--color-text-muted);
    letter-spacing: 2px;
    text-transform: uppercase;
}

.nav-toggle {
    display: none;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 8px;
    color: var(--color-text);
    font-size: 20px;
    cursor: pointer;
    padding: 10px;
    min-width: 44px;
    min-height: 44px;
    position: relative;
    z-index: 1001;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 28px;
    list-style: none;
}

.nav-link {
    font-size: 14px;
    color: var(--color-text-secondary);
    transition: var(--transition);
    font-weight: 500;
}

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

.nav-cta {
    padding: 9px 22px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-bg) !important;
    border-radius: 6px;
    font-weight: 600;
    font-size: 14px;
    transition: var(--transition);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(201, 168, 76, 0.3);
}

/* Hero */
.hero {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 100px 20px 80px;
}

.hero-bg {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: -2;
}

.hero-bg img {
    width: 100%; height: 100%;
    object-fit: cover;
    object-position: center;
}

.hero-overlay {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background:
        radial-gradient(ellipse 80% 60% at 50% 40%, rgba(6, 10, 20, 0.72) 0%, transparent 70%),
        linear-gradient(
            180deg,
            rgba(6, 10, 20, 0.88) 0%,
            rgba(6, 10, 20, 0.80) 35%,
            rgba(6, 10, 20, 0.82) 60%,
            rgba(6, 10, 20, 0.94) 100%
        );
    z-index: -1;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    z-index: 1;
}

.hero-eyebrow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    margin-bottom: 32px;
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 5px;
    color: rgba(201, 168, 76, 0.9);
    text-shadow: 0 1px 8px rgba(0, 0, 0, 0.8);
}

.eyebrow-line {
    width: 32px;
    height: 1px;
    background: rgba(201, 168, 76, 0.5);
    box-shadow: 0 0 8px rgba(201, 168, 76, 0.3);
}

.hero-title {
    margin-bottom: 24px;
}

.title-pre {
    display: block;
    font-family: var(--font-body);
    font-size: clamp(12px, 1.8vw, 16px);
    font-weight: 300;
    color: rgba(201, 168, 76, 0.85);
    letter-spacing: 5px;
    text-transform: uppercase;
    margin-bottom: 8px;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.9), 0 0 40px rgba(0, 0, 0, 0.6);
}

.title-main {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(48px, 10vw, 96px);
    font-weight: 700;
    background: linear-gradient(180deg, #f5e6a3 0%, var(--color-primary) 50%, var(--color-primary-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
    letter-spacing: -1px;
    filter: drop-shadow(0 4px 24px rgba(0, 0, 0, 0.85)) drop-shadow(0 2px 8px rgba(0, 0, 0, 0.7));
}

.hero-subtitle {
    font-family: var(--font-display);
    font-size: clamp(18px, 3vw, 26px);
    font-weight: 400;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 12px;
    letter-spacing: 2px;
    text-shadow: 0 2px 16px rgba(0, 0, 0, 0.9), 0 0 40px rgba(0, 0, 0, 0.6);
}

.hero-desc {
    font-size: 14px;
    color: rgba(200, 200, 220, 0.85);
    margin-bottom: 44px;
    letter-spacing: 1px;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.9);
}

.hero-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0;
    margin-bottom: 44px;
    flex-wrap: wrap;
}

.stat {
    text-align: center;
    padding: 16px 28px;
    background: rgba(6, 10, 20, 0.55);
    border: 1px solid rgba(201, 168, 76, 0.15);
    border-radius: 12px;
}

.stat:first-child { border-radius: 12px 0 0 12px; border-right: none; }
.stat:last-child { border-radius: 0 12px 12px 0; border-left: none; }

.stat {
    text-align: center;
}

.stat-num {
    display: block;
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 700;
    color: var(--color-primary);
    text-shadow: 0 2px 16px rgba(0, 0, 0, 0.9), 0 0 30px rgba(201, 168, 76, 0.3);
}

.stat-label {
    font-size: 11px;
    color: rgba(200, 200, 220, 0.75);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-top: 4px;
    text-shadow: 0 1px 8px rgba(0, 0, 0, 0.8);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: rgba(201, 168, 76, 0.25);
    align-self: center;
    margin-top: -4px;
}

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

.scroll-hint {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.65);
    font-size: 11px;
    letter-spacing: 2px;
    text-shadow: 0 1px 8px rgba(0, 0, 0, 0.9);
    animation: scrollBounce 2s infinite;
}

@keyframes scrollBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); opacity: 0.5; }
    50% { transform: translateX(-50%) translateY(8px); opacity: 1; }
}

/* About */
.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 64px;
    align-items: start;
}

.about-text .lead-text {
    font-size: 17px;
    color: var(--color-text);
    line-height: 1.9;
    margin-bottom: 18px;
}

.about-text p {
    color: var(--color-text-secondary);
    font-size: 15px;
    line-height: 1.8;
    margin-bottom: 32px;
}

.about-values {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.value-item {
    display: flex;
    gap: 16px;
    align-items: start;
}

.value-item i {
    font-size: 22px;
    color: var(--color-primary);
    margin-top: 2px;
}

.value-item h4 {
    font-size: 16px;
    margin-bottom: 4px;
    color: var(--color-text);
}

.value-item p {
    font-size: 13px;
    color: var(--color-text-secondary);
    margin: 0;
    line-height: 1.6;
}

.about-visual {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.visual-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: 16px;
    padding: 28px;
    transition: var(--transition);
}

.visual-card:hover {
    border-color: var(--color-primary);
    transform: translateX(8px);
}

.card-icon {
    width: 52px;
    height: 52px;
    background: rgba(201, 168, 76, 0.12);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: var(--color-primary);
    margin-bottom: 16px;
}

.visual-card h3 {
    font-family: var(--font-display);
    font-size: 18px;
    margin-bottom: 8px;
    color: var(--color-text);
}

.visual-card p {
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* Investment Strategy */
.strategy-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.strategy-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: 16px;
    padding: 36px 28px;
    transition: var(--transition);
}

.strategy-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-6px);
    box-shadow: 0 20px 60px rgba(201, 168, 76, 0.1);
}

.strategy-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, rgba(201, 168, 76, 0.15) 0%, rgba(201, 168, 76, 0.05) 100%);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    color: var(--color-primary);
    margin-bottom: 22px;
}

.strategy-card h3 {
    font-family: var(--font-display);
    font-size: 18px;
    margin-bottom: 12px;
    color: var(--color-text);
}

.strategy-card p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* Teams */
.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.team-member {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: 16px;
    padding: 28px 22px;
    transition: var(--transition);
}

.team-member.featured {
    grid-column: span 2;
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 22px;
    align-items: start;
    border-color: var(--color-primary);
    background: rgba(201, 168, 76, 0.06);
}

.member-avatar {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 700;
    color: var(--color-bg);
    flex-shrink: 0;
}

.team-member:not(.featured) .member-avatar {
    width: 52px;
    height: 52px;
    font-size: 18px;
    border-radius: 12px;
}

.member-avatar i {
    font-size: 22px;
}

.member-info h3 {
    font-family: var(--font-display);
    font-size: 17px;
    margin-bottom: 6px;
    color: var(--color-text);
}

.member-role {
    display: inline-block;
    font-size: 11px;
    font-family: var(--font-mono);
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.member-bio {
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.team-member:not(.featured) {
    cursor: default;
}

.team-member:not(.featured):hover {
    border-color: rgba(201, 168, 76, 0.3);
    transform: translateY(-4px);
}

/* Portfolio */
.portfolio-header {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 56px;
    align-items: center;
    margin-bottom: 56px;
}

.portfolio-text .lead-text {
    font-size: 17px;
    color: var(--color-text);
    line-height: 1.9;
    margin-bottom: 16px;
}

.portfolio-visual img {
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    border: 1px solid var(--color-border-light);
}

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

.pillar {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: 16px;
    padding: 32px 24px;
    text-align: center;
    transition: var(--transition);
}

.pillar:hover {
    border-color: var(--color-primary);
    transform: translateY(-6px);
}

.pillar-number {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--color-primary);
    letter-spacing: 3px;
    margin-bottom: 14px;
}

.pillar h4 {
    font-family: var(--font-display);
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--color-text);
}

.pillar p {
    font-size: 13px;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
}

.pillar-status {
    display: inline-block;
    padding: 4px 14px;
    background: rgba(201, 168, 76, 0.12);
    color: var(--color-primary);
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1px;
}

/* Quantum */
.quantum-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.quantum-visual img {
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    border: 1px solid var(--color-border-light);
}

.quantum-content .quantum-desc {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.9;
    margin-bottom: 32px;
}

.quantum-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 36px;
}

.q-feature {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px;
    background: var(--color-bg-card);
    border-radius: 12px;
    border: 1px solid var(--color-border-light);
}

.q-feature i {
    font-size: 20px;
    color: var(--color-primary);
}

.q-feat-title {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
}

.q-feat-desc {
    display: block;
    font-size: 12px;
    color: var(--color-text-muted);
}

.quantum-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

/* Strategy Timeline */
.leap-timeline {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 0;
}

.leap-item {
    display: flex;
    gap: 28px;
    padding: 28px 0;
    border-bottom: 1px solid var(--color-border-light);
    transition: var(--transition);
}

.leap-item:first-child {
    border-top: 1px solid var(--color-border-light);
}

.leap-item:hover {
    padding-left: 12px;
}

.leap-item:hover .leap-number {
    color: var(--color-primary);
}

.leap-number {
    font-family: var(--font-mono);
    font-size: 28px;
    font-weight: 700;
    color: var(--color-text-muted);
    min-width: 48px;
    transition: var(--transition);
}

.leap-content h4 {
    font-family: var(--font-display);
    font-size: 18px;
    margin-bottom: 8px;
    color: var(--color-text);
}

.leap-content p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* Contact */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: start;
}

.contact-info .contact-desc {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 36px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: start;
}

.contact-item i {
    font-size: 20px;
    color: var(--color-primary);
    margin-top: 3px;
}

.contact-item h4 {
    font-size: 15px;
    margin-bottom: 4px;
    color: var(--color-text);
}

.contact-item p {
    font-size: 14px;
    color: var(--color-text-secondary);
}

.contact-form-wrapper {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: 20px;
    padding: 40px;
}

.contact-form h3 {
    font-family: var(--font-display);
    font-size: 24px;
    margin-bottom: 28px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-bottom: 14px;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    padding: 14px 16px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--color-border-light);
    border-radius: 8px;
    color: var(--color-text);
    font-size: 14px;
    font-family: var(--font-body);
    transition: var(--transition);
    margin-bottom: 14px;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    background: rgba(201, 168, 76, 0.05);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--color-text-muted);
}

.contact-form select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238892a4' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 40px;
}

.contact-form select option {
    background: var(--color-bg);
    color: var(--color-text);
}

/* Footer */
.footer {
    background: var(--color-bg-alt);
    padding: 72px 0 32px;
    border-top: 1px solid var(--color-border-light);
    position: relative;
    z-index: 1;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 56px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.footer-logo-img {
    height: 32px;
    width: auto;
    object-fit: contain;
    flex-shrink: 0;
}
    font-size: 18px;
    font-weight: 700;
    color: var(--color-bg);
}

.footer-logo-name {
    font-family: var(--font-display);
    font-size: 17px;
    font-weight: 600;
    color: var(--color-text);
    display: block;
}

.footer-logo-sub {
    font-size: 10px;
    color: var(--color-text-muted);
    letter-spacing: 1px;
}

.footer-brand p {
    font-size: 13px;
    color: var(--color-text-secondary);
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.footer-social a {
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    font-size: 16px;
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--color-primary);
    color: var(--color-bg);
}

.footer-links h4 {
    font-family: var(--font-display);
    font-size: 15px;
    margin-bottom: 20px;
    color: var(--color-text);
}

.footer-links a {
    display: block;
    font-size: 13px;
    color: var(--color-text-secondary);
    padding: 6px 0;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--color-primary);
    transform: translateX(4px);
}

.footer-bottom {
    border-top: 1px solid var(--color-border-light);
    padding-top: 28px;
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    color: var(--color-text-muted);
    margin-bottom: 6px;
}

.footer-disclaimer {
    font-size: 11px !important;
    opacity: 0.6;
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 1024px) {
    .strategy-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .team-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .team-member.featured {
        grid-column: span 2;
    }
    .portfolio-pillars {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .section { padding: 72px 0; }
    
    /* Navbar - 纯显示方案，无动画 */
    .nav-menu {
        position: fixed;
        top: 56px;
        left: 0;
        right: 0;
        z-index: 9999;
        background: #0a0e1a;
        flex-direction: column;
        align-items: stretch;
        padding: 0;
        display: none;
    }
    .nav-menu.active {
        display: flex;
    }
    .nav-menu li { width: 100%; }
    .nav-link {
        display: block;
        padding: 16px 24px;
        font-size: 16px;
        color: var(--color-text-secondary);
        border-bottom: 1px solid var(--color-border-light);
    }
    .nav-link::after { display: none; }
    .nav-cta {
        margin-top: 12px;
        text-align: center;
        display: block;
        padding: 14px 24px;
    }
    .nav-toggle { display: block; }
    
    /* Hero */
    .hero { padding: 90px 16px 60px; }
    .hero-stats { gap: 12px; }
    .stat { padding: 12px 18px; }
    .stat:first-child, .stat:last-child { border-radius: 12px; border: 1px solid rgba(201, 168, 76, 0.15); }
    .stat-divider { display: none; }
    .hero-actions { flex-direction: column; align-items: center; width: 100%; max-width: 280px; margin: 0 auto; }
    .hero-actions .btn { width: 100%; }
    
    /* About */
    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    
    /* Strategy */
    .strategy-grid { grid-template-columns: 1fr; }
    
    /* Teams */
    .team-grid { grid-template-columns: 1fr 1fr; gap: 14px; }
    .team-member.featured { grid-column: span 2; display: block; }
    .team-member.featured .member-avatar { width: 60px; height: 60px; }
    
    /* Portfolio */
    .portfolio-header { grid-template-columns: 1fr; gap: 32px; }
    .portfolio-pillars { grid-template-columns: 1fr 1fr; }
    
    /* Quantum */
    .quantum-grid { grid-template-columns: 1fr; gap: 40px; }
    .quantum-features { grid-template-columns: 1fr; }
    
    /* Contact */
    .contact-grid { grid-template-columns: 1fr; gap: 40px; }
    .contact-form-wrapper { padding: 28px; }
    .form-row { grid-template-columns: 1fr; }
    
    /* Footer */
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
}

/* ========== Language Selector ========== */
.lang-selector {
    display: flex;
    align-items: center;
    gap: 4px;
}

.lang-btn {
    padding: 6px 12px;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 6px;
    color: var(--color-text-secondary);
    font-size: 13px;
    font-family: var(--font-body);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    letter-spacing: 0.5px;
}

.lang-btn:hover {
    color: var(--color-primary);
    background: rgba(201, 168, 76, 0.08);
}

.lang-btn.active {
    color: var(--color-primary);
    border-color: var(--color-border);
    background: rgba(201, 168, 76, 0.12);
}

/* 移动端内嵌语言选择器 */
.nav-lang-mobile {
    display: none;
    width: 100%;
    padding-top: 20px;
    margin-top: 12px;
    border-top: 1px solid var(--color-border-light);
}

.lang-inline {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
}

.lang-label {
    display: block;
    text-align: center;
    font-size: 11px;
    color: var(--color-text-muted);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 12px;
}

/* 移动端语言选择器可见 */
@media (max-width: 768px) {
    .lang-selector.desktop-only {
        display: none !important;
    }
    .nav-lang-mobile {
        display: block;
    }
}

@media (max-width: 480px) {
    .hero-stats { flex-direction: column; gap: 12px; }
    .stat { width: 100%; border-radius: 12px !important; }
}