/* Reset and Base Styles */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-bg: #0a0a0f;
    --color-bg-secondary: #12121a;
    --color-bg-tertiary: #1a1a25;
    --color-text: #e8e8ec;
    --color-text-secondary: #9a9aaa;
    --color-text-muted: #6a6a7a;
    --color-accent: #c9a962;
    --color-accent-muted: rgba(201, 169, 98, 0.15);
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-light: rgba(255, 255, 255, 0.12);

    --font-serif: 'Cormorant Garamond', Georgia, serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    --container-width: 1100px;
    --section-padding: 120px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-weight: 300;
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 40px;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

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

.logo-icon {
    height: 35px;
    width: auto;
}

.logo-text {
    font-family: var(--font-serif);
    font-size: 16px;
    font-weight: 500;
    letter-spacing: 0.15em;
    color: #c9a962;
}

/* Partner Name Styles */
.partner-card {
    display: flex;
    gap: 50px;
    align-items: flex-start;
}

.partner-photo {
    flex-shrink: 0;
}

.partner-photo img {
    width: 200px;
    height: 260px;
    object-fit: cover;
    object-position: center top;
    border-radius: 4px;
    filter: grayscale(20%);
}

.partner-name {
    margin-bottom: 35px;
    padding-bottom: 25px;
    border-bottom: 1px solid var(--color-border-light);
}

.partner-name h3 {
    font-family: var(--font-serif);
    font-size: 28px;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 8px;
}

.partner-title {
    font-size: 14px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-accent);
}

.nav-links {
    display: flex;
    gap: 40px;
}

.nav-links a {
    font-size: 13px;
    font-weight: 400;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: var(--color-text);
}

/* Investor Login Link */
.nav-login {
    color: var(--color-accent) !important;
    font-weight: 500 !important;
}

.nav-login:hover {
    color: #d4b56d !important;
}

/* Language Switcher */
.nav-right {
    display: flex;
    align-items: center;
    gap: 30px;
}

.lang-switcher {
    display: flex;
    align-items: center;
    gap: 8px;
}

.lang-btn {
    background: none;
    border: none;
    font-size: 12px;
    font-weight: 400;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 5px 8px;
    transition: color 0.3s ease;
}

.lang-btn:hover {
    color: var(--color-text-secondary);
}

.lang-btn.active {
    color: var(--color-accent);
}

.lang-divider {
    color: var(--color-text-muted);
    font-size: 12px;
}

/* Chinese Font Support */
body.lang-zh {
    font-family: 'Inter', 'Noto Serif SC', -apple-system, BlinkMacSystemFont, sans-serif;
}

body.lang-zh .hero-title,
body.lang-zh .section-title,
body.lang-zh .philosophy-content h4,
body.lang-zh .risk-item h4,
body.lang-zh .approach-column h3 {
    font-family: 'Noto Serif SC', 'Cormorant Garamond', Georgia, serif;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 120px 40px 80px;
    position: relative;
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-secondary) 100%);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 50% 30%, rgba(201, 169, 98, 0.03) 0%, transparent 60%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: 48px;
    font-weight: 400;
    letter-spacing: 0.15em;
    margin-bottom: 30px;
    color: var(--color-text);
}

.hero-subtitle {
    font-size: 18px;
    font-weight: 300;
    color: var(--color-text-secondary);
    max-width: 520px;
    margin: 0 auto 50px;
    line-height: 1.8;
}

.hero-keywords {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    font-size: 12px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.hero-keywords .divider {
    color: var(--color-accent);
}

.hero-scroll {
    position: absolute;
    bottom: 50px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.hero-scroll span {
    font-size: 11px;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    text-transform: uppercase;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(180deg, var(--color-accent) 0%, transparent 100%);
}

/* Section Titles */
.section-title {
    font-family: var(--font-serif);
    font-size: 32px;
    font-weight: 400;
    letter-spacing: 0.05em;
    margin-bottom: 60px;
    color: var(--color-text);
}

/* Approach Section */
.approach {
    padding: var(--section-padding) 0;
    background: var(--color-bg-secondary);
}

.approach-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.approach-column h3 {
    font-family: var(--font-serif);
    font-size: 20px;
    font-weight: 500;
    margin-bottom: 30px;
    color: var(--color-text);
    padding-bottom: 15px;
    border-bottom: 1px solid var(--color-border-light);
}

.approach-column.dont h3 {
    color: var(--color-text-secondary);
}

.approach-column ul {
    list-style: none;
}

.approach-column li {
    font-size: 15px;
    color: var(--color-text-secondary);
    padding: 15px 0;
    border-bottom: 1px solid var(--color-border);
    padding-left: 20px;
    position: relative;
}

.approach-column li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 4px;
    background: var(--color-accent);
    border-radius: 50%;
}

.approach-column.dont li::before {
    background: var(--color-text-muted);
}

/* Philosophy Section */
.philosophy {
    padding: var(--section-padding) 0;
    background: var(--color-bg);
}

.philosophy-items {
    display: flex;
    flex-direction: column;
    gap: 50px;
}

.philosophy-item {
    display: flex;
    gap: 40px;
    padding-bottom: 50px;
    border-bottom: 1px solid var(--color-border);
}

.philosophy-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.philosophy-number {
    font-family: var(--font-serif);
    font-size: 14px;
    color: var(--color-accent);
    letter-spacing: 0.1em;
    flex-shrink: 0;
    padding-top: 5px;
}

.philosophy-content h4 {
    font-family: var(--font-serif);
    font-size: 22px;
    font-weight: 500;
    margin-bottom: 15px;
    color: var(--color-text);
}

.philosophy-content p {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* Risk Section */
.risk {
    padding: var(--section-padding) 0;
    background: var(--color-bg-secondary);
}

.risk-intro {
    font-size: 18px;
    color: var(--color-text-secondary);
    margin-bottom: 60px;
    max-width: 600px;
}

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

.risk-item {
    padding: 40px;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
}

.risk-item h4 {
    font-family: var(--font-serif);
    font-size: 18px;
    font-weight: 500;
    margin-bottom: 20px;
    color: var(--color-text);
}

.risk-item p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* About Section */
.about {
    padding: var(--section-padding) 0;
    background: var(--color-bg);
}

.about-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 80px;
}

.about-main p {
    font-size: 16px;
    color: var(--color-text-secondary);
    margin-bottom: 25px;
    line-height: 1.9;
}

.about-details {
    border-left: 1px solid var(--color-border-light);
    padding-left: 40px;
}

.detail-item {
    margin-bottom: 30px;
}

.detail-label {
    display: block;
    font-size: 11px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: 8px;
}

.detail-value {
    font-size: 15px;
    color: var(--color-text);
}

/* Partner Section */
.partner {
    padding: var(--section-padding) 0;
    background: var(--color-bg-secondary);
}

.partner-card {
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    padding: 50px;
}

.partner-credentials {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 35px;
}

.credential {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.credential-label {
    font-size: 11px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.credential-value {
    font-size: 15px;
    color: var(--color-text-secondary);
}

/* Footer */
.footer {
    padding: 60px 0;
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    gap: 60px;
}

.footer-logo {
    font-family: var(--font-serif);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.2em;
    color: var(--color-text-muted);
    flex-shrink: 0;
}

.footer-text {
    flex: 1;
}

.footer-text p {
    font-size: 12px;
    color: var(--color-text-muted);
    line-height: 1.8;
    margin-bottom: 20px;
}

.footer-text .copyright {
    margin-bottom: 0;
    color: var(--color-text-muted);
}

/* Responsive */
@media (max-width: 900px) {
    :root {
        --section-padding: 80px;
    }

    .nav-links {
        display: none;
    }

    .hero-title {
        font-size: 36px;
        letter-spacing: 0.1em;
    }

    .hero-keywords {
        flex-wrap: wrap;
        gap: 10px;
    }

    .approach-grid {
        grid-template-columns: 1fr;
        gap: 50px;
    }

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

    .about-grid {
        grid-template-columns: 1fr;
        gap: 50px;
    }

    .about-details {
        border-left: none;
        border-top: 1px solid var(--color-border-light);
        padding-left: 0;
        padding-top: 40px;
    }

    .partner-credentials {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        gap: 30px;
    }
}

@media (max-width: 600px) {
    .container {
        padding: 0 25px;
    }

    .nav-container {
        padding: 0 25px;
    }

    .hero {
        padding: 100px 25px 60px;
    }

    .hero-title {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .section-title {
        font-size: 26px;
        margin-bottom: 40px;
    }

    .philosophy-item {
        flex-direction: column;
        gap: 15px;
    }

    .risk-item {
        padding: 30px;
    }

    .partner-card {
        padding: 30px;
    }
}