:root {
    --color-bg: #1a1c20;
    --color-text: #ffffff;
    --color-text-secondary: rgba(255, 255, 255, 0.6);
    --color-accent: #3befb7;
    --color-accent-hover: #32d4a2;
    --color-card-bg: #2a2c30;
    --color-text-dark: #26282b;
    
    --font-primary: MiSans, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
    
    --container-width: 1200px;
    --container-padding: 24px;
    
    --transition-speed: 0.3s;
}

/* Reset & Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-speed);
}

ul {
    list-style: none;
}

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

/* Utilities */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.text-center {
    text-align: center;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(26, 28, 32, 0.9);
    backdrop-filter: blur(10px);
    padding: 20px 0;
    transition: padding var(--transition-speed);
}

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

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

.logo__icon {
    width: 32px;
    height: 32px;
}

.logo__text {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-text);
}

.nav__list {
    display: flex;
    gap: 40px;
}

.nav__link {
    font-size: 16px;
    font-weight: 500;
    opacity: 0.8;
}

.nav__link:hover {
    opacity: 1;
    color: var(--color-accent);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
}

.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    transition: all var(--transition-speed);
}

/* Hero Section */
.hero {
    padding-top: 160px;
    padding-bottom: 80px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(circle, rgba(59, 239, 183, 0.1) 0%, rgba(26, 28, 32, 0) 70%);
    z-index: -1;
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero__content {
    max-width: 600px;
    display: flex;
    flex-direction: column;
    gap: 0;
}

/* Title Group */
.hero__text-group {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.hero__title-main {
    font-size: 64px;
    font-weight: 800; /* Bold */
    line-height: 85px;
    color: #ffffff;
    letter-spacing: 0;
}

.hero__title-sub {
    font-size: 64px;
    font-weight: 300; /* Thin */
    line-height: 85px;
    color: #ffffff;
    letter-spacing: 0;
}

/* Download Buttons */
.hero__actions {
    display: grid;
    grid-template-columns: repeat(2, 200px);
    gap: 24px 36px; /* Row Gap 24px, Column Gap 36px to match Figma layout */
    margin-top: 72px; /* Match Figma spacing */
}

.btn-download {
    display: flex;
    align-items: center;
    justify-content: space-between; /* Icon left, Text right/center */
    width: 200px;
    height: 64px;
    background-color: #3befb7;
    border-radius: 38px;
    padding: 0 36px; /* Match Figma padding */
    color: #26282b;
    transition: all 0.3s ease;
}

.btn-download:hover {
    background-color: #32d4a2;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(59, 239, 183, 0.4);
}

.btn-download__icon {
    width: 24px;
    height: 24px;
}

.btn-download__text {
    font-family: "PingFang SC", sans-serif;
    font-size: 20px;
    font-weight: 600;
    line-height: 28px;
    flex-grow: 1;
    text-align: center;
}

/* Features Strip (Shield, Globe, Lightning) */
.features-strip {
    display: flex;
    justify-content: space-between;
    width: 396px;
    margin-top: 54px; /* Match Figma spacing */
}

.features-strip__item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.features-strip__icon-wrapper {
    width: 84px;
    height: 84px;
}

.features-strip__img {
    width: 84px;
    height: 84px;
}

.features-strip__text {
    margin-top: 16px;
    font-size: 16px;
    font-weight: 500;
    color: #ffffff;
    opacity: 0.6;
    line-height: 22px;
    white-space: nowrap;
}

/* Custom CSS Icon for "Global Nodes" (Target) */
.features-strip__custom-icon {
    position: relative;
    width: 84px;
    height: 84px;
}

/* Outer Ring (Faint) */
.target-outer-ring {
    position: absolute;
    top: 0;
    left: 0;
    width: 84px;
    height: 84px;
    border: 2px solid #ffffff;
    opacity: 0.1;
    border-radius: 50%;
    box-sizing: border-box;
}

/* Middle Ring (Bright) - frame9 */
.target-middle-ring {
    position: absolute;
    top: 24px;
    left: 24px;
    width: 36px;
    height: 36px;
    border: 3px solid #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 5px;
    box-sizing: border-box;
}

/* Inner Ring (Container for dot) - frame8 */
.target-inner-ring {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    border: 3px solid #ffffff;
    border-radius: 50%;
    padding: 5px; /* Add padding for the dot */
    box-sizing: border-box;
}

/* Center Dot - frame7 */
.target-center-dot {
    width: 6px;
    height: 6px;
    background-color: #3befb7;
    border-radius: 50%;
}

/* Needle - frame10 */
.target-needle {
    position: absolute;
    top: 27px;
    left: 47px;
    width: 3px;
    height: 18px;
    background-color: #3befb7;
    border-radius: 2px;
    transform: rotate(45deg);
    transform-origin: center;
}


.hero__image-wrapper {
    position: relative;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
    100% { transform: translateY(0px); }
}

/* Orbit Section */
.orbit {
    padding: 100px 0;
    position: relative;
    overflow: hidden;
    background-color: #000000; /* Darker background */
}

.section-header {
    margin-bottom: 80px;
}

.section-title {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 24px;
    color: var(--color-text-secondary);
    font-weight: 300;
}

.orbit__visual {
    position: relative;
    width: 800px; /* Increased size to accommodate the background image details */
    height: 800px;
    margin: 0 auto;
    /* Removed CSS borders as they are in the background image */
}

.orbit__visual::before,
.orbit__visual::after {
    display: none; /* Hide CSS rings */
}

.orbit__bg {
    width: 100%;
    height: 100%;
    object-fit: contain;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
}

.orbit__center {
    display: none; /* Central logo is likely in the BG image or we position it on top if needed. Assuming BG has it or we add it back. */
    /* Wait, if BG has rings but not the central logo? The OCR says "Center: White circle containing... mark". The BG image 790o1hr likely has it. */
}

.orbit__icon {
    position: absolute;
    width: 60px;
    height: 60px;
    /* background: var(--color-card-bg);  Removed background to blend with design if needed, or keep it if design demands */
    background: transparent; /* Icons in Figma often float without extra bg container if they are SVGs, or have their own. Let's try transparent first. */
    /* padding: 12px; */
    display: flex;
    align-items: center;
    justify-content: center;
    /* box-shadow: 0 4px 20px rgba(0,0,0,0.2); */
    transition: transform 0.3s;
    z-index: 2; /* Above BG */
}

.orbit__icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: drop-shadow(0 4px 10px rgba(0,0,0,0.3)); /* Add shadow to icons directly */
}

.orbit__icon:hover {
    transform: scale(1.1);
    z-index: 3;
}

/* Positioning orbit icons manually to match the Background Image spots */
/* NOTE: These percentages need to be tuned to match the underlying image rings. */
/* Assuming 800x800 container. */

.orbit__icon--1 { top: 22%; left: 78%; transform: translate(-50%, -50%); } /* Pinterest (Red P) - Top Rightish */
.orbit__icon--2 { top: 38%; left: 45%; transform: translate(-50%, -50%); } /* ChatGPT (White swirl) - Center Leftish */
.orbit__icon--3 { top: 35%; left: 22%; transform: translate(-50%, -50%); } /* X (Black/White X) - Left */
.orbit__icon--4 { top: 50%; left: 68%; transform: translate(-50%, -50%); } /* Facebook (Blue f) - Right */
.orbit__icon--5 { top: 70%; left: 80%; transform: translate(-50%, -50%); } /* Dribbble (Pink ball) - Bottom Right */
.orbit__icon--6 { top: 75%; left: 55%; transform: translate(-50%, -50%); } /* YouTube (Red play) - Bottom Center */
.orbit__icon--7 { top: 82%; left: 40%; transform: translate(-50%, -50%); } /* Behance (Blue Be) - Bottom Left */

/* 
   Note: The previous manual positioning was a guess. 
   Now we align them relative to the 800x800 BG image. 
   Pinterest is usually top-right. 
   ChatGPT is usually near center.
   X is left.
   Facebook is right.
   Dribbble is bottom-right.
   YouTube is bottom.
   Behance is bottom-left.
*/

/* Features Section */
.features {
    padding: 100px 0;
    background-color: #1a1c20; /* Base color, deeper than sections with overlays */
}

.features__grid {
    display: flex;
    flex-direction: column;
    gap: 120px;
}

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

.feature-card--reverse {
    direction: rtl; /* Switch order */
}

.feature-card--reverse .feature-card__content {
    direction: ltr; /* Reset text direction */
}

.feature-card__content {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.feature-card__title {
    font-size: 48px;
    font-weight: 800;
    color: #ffffff;
    line-height: 1.2;
}

.feature-card__text {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.6;
    font-weight: 500;
    max-width: 600px;
}

.feature-card__image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.feature-card__image img {
    max-width: 100%;
    height: auto;
    /* Ensure illustrations fit nicely */
    max-height: 400px;
}

/* Platforms Section */
.platforms {
    padding: 100px 0;
    background-color: #0d0e10; /* Deep dark background matching features */
}

.platforms .section-title {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

.title-highlight {
    font-weight: 800;
}

.title-light {
    font-weight: 300;
}

.title-slashes {
    color: #3befb7;
    font-weight: 800;
    letter-spacing: -2px;
    font-style: italic;
    font-family: sans-serif; /* Ensure slashes look geometric */
}

.platforms__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 60px;
}

.platform-card {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    transition: all var(--transition-speed);
    border: 1px solid transparent;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.platform-card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(59, 239, 183, 0.3);
    transform: translateY(-10px);
}

.platform-card__icon-wrapper {
    width: 80px;
    height: 80px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    background: rgba(255, 255, 255, 0.02);
}

.platform-card__icon {
    width: 40px;
    height: 40px;
    /* Ensure icons are white if they aren't already */
    filter: brightness(0) invert(1); 
}

.platform-card__title {
    font-size: 18px; /* Adjusted size based on "PC版下载" being a label */
    margin-bottom: 32px;
    font-weight: 500;
    opacity: 0.8;
}

.btn--block {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    gap: 8px;
    font-weight: 600;
    font-size: 16px;
}

.btn--mint {
    background-color: #3befb7;
    color: #26282b;
    border: none;
    border-radius: 32px; /* Pill shape */
    padding: 12px 24px;
}

.btn--mint:hover {
    background-color: #32d4a2;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(59, 239, 183, 0.4);
}

.btn__icon {
    width: 16px;
    height: 16px;
}


/* Footer */
.footer {
    padding: 80px 0 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    margin-top: 100px;
}

.footer__container {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 60px;
}

.footer__brand {
    max-width: 300px;
}

.footer__copyright {
    margin-top: 24px;
    color: var(--color-text-secondary);
    font-size: 14px;
}

.footer__links {
    display: flex;
    gap: 80px;
    flex-wrap: wrap;
}

.footer__title {
    font-size: 18px;
    margin-bottom: 24px;
    color: var(--color-text);
}

.footer__list li {
    margin-bottom: 12px;
}

.footer__list a {
    color: var(--color-text-secondary);
    font-size: 14px;
}

.footer__list a:hover {
    color: var(--color-accent);
}

/* Responsive Styles */
@media (max-width: 1024px) {
    .hero__title-main, .hero__title-sub {
        font-size: 48px;
        line-height: 1.2;
    }
    
    .feature-card__title {
        font-size: 32px;
    }
    
    .platforms__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: var(--color-bg);
        padding: 20px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .nav.active {
        display: block;
    }

    .nav__list {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .hero__container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero__content {
        margin: 0 auto;
        align-items: center;
    }

    .hero__text-group {
        align-items: center;
    }

    .hero__actions {
        justify-content: center;
        /* Keep grid layout but center the grid if width allows, or switch to flex if simpler */
        /* For mobile, flex column is usually better */
    }

    .features-strip {
        width: auto;
        flex-direction: row;
        gap: 20px;
    }

    .orbit__visual {
        width: 100%;
        height: auto;
        aspect-ratio: 1;
    }

    .features__grid {
        gap: 60px;
    }

    .feature-card {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }

    .feature-card--reverse {
        direction: ltr;
    }

    .footer__container {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .footer__links {
        justify-content: center;
        gap: 40px;
    }
}

@media (max-width: 480px) {
    .hero__title-main, .hero__title-sub {
        font-size: 36px;
    }

    .hero__actions {
        grid-template-columns: 1fr;
    }
    
    .btn-download {
        width: 100%;
        justify-content: center;
    }

    .platforms__grid {
        grid-template-columns: 1fr;
    }
    
    .features-strip {
        flex-wrap: wrap;
        justify-content: center;
    }
}