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

:root {
    --bg: #091e20;
    --card-bg: #060D18;
    --primary: #02d499;
    --primary2: #02d499;
    --text: #FFFFFF;
    --text-muted: #B8C8D8;
    --border: #03c195;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: 'Segoe UI', system-ui, -apple-system, Arial, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    background-image: url('../img/bg.png');
    background-size: 100% auto;
    background-repeat: no-repeat;
    padding-top: 80px;
}

/* ── HEADER ─── */

.header {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 18%;
    position: fixed;
    top: 0;
    z-index: 100;
    background: #155155;
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
}

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

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

.menu {
    display: flex;
    align-items: center;
}

.menu a {
    color: #fff;
    font-size: 16px;
    margin-left: 20px;
    text-decoration: none;
}

.menu a:hover {
    color: #04eca4
}

/* ── HERO ── */

.hero {
    position: relative;
    display: flex;
    align-items: center;
    padding: 50px 30px;
}

/* layered background glows */
.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    /* background:
    radial-gradient(ellipse 55% 70% at 18% 60%, rgba(0, 120, 255, 0.18) 0%, transparent 65%),
    radial-gradient(ellipse 65% 65% at 26% 48%, rgba(4, 237, 159, 0.12) 0%, transparent 68%),
    radial-gradient(ellipse 45% 55% at 82% 32%, rgba(0, 140, 255, 0.10) 0%, transparent 60%),
    radial-gradient(ellipse 35% 40% at 70% 80%, rgba(0, 80, 200, 0.10) 0%, transparent 55%),
    var(--bg); */
}

/* subtle grid */
.hero-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(4, 237, 159, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(4, 237, 159, 0.04) 1px, transparent 1px);
    background-size: 58px 58px;
}

/* angular slash lines */
.hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    /* background:
    linear-gradient(145deg, transparent 45%, rgba(0,180,255,0.07) 46%, rgba(0,180,255,0.07) 47%, transparent 48%),
    linear-gradient(145deg, transparent 55%, rgba(0,100,220,0.05) 56%, rgba(0,100,220,0.05) 57%, transparent 58%),
    linear-gradient(145deg, transparent 62%, rgba(0,180,255,0.04) 63%, rgba(0,180,255,0.04) 63.5%, transparent 64.5%); */
}

.hero-inner {
    position: relative;
    z-index: 1;
    max-width: 1120px;
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 40px;
}

/* ── Hero logo image ── */
.hero-logo {
    margin-bottom: 20px;
    user-select: none;
}

.hero-logo img {
    max-width: 320px;
    width: 100%;
    height: auto;
    filter:
        drop-shadow(0 0 24px rgba(4, 237, 159, 0.55)) drop-shadow(0 0 55px rgba(0, 100, 220, 0.30));
}

/* H1 */
.hero h1 {
    width: 600px;
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(14px, 2vw, 30px);
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 0;
    margin-bottom: 5px;
    line-height: 1.2;
}

.hero h1 .accent {
    color: var(--primary);
    text-shadow:
        0 0 18px rgba(4, 237, 159, 0.65),
        0 0 45px rgba(4, 237, 159, 0.30);
}

.hero-desc {
    color: #fff;
    font-size: 18px;
    line-height: 1.2;
    margin-bottom: 15px;
}

.hero-rew {
    width: auto;
    height: 18px;
}

/* ── Button wave animations ── */
@keyframes btn-shine {
    0% {
        transform: skewX(-22deg) translateX(-320%);
    }

    72%,
    100% {
        transform: skewX(-22deg) translateX(460%);
    }
}

@keyframes btn-glow-pulse {

    0%,
    100% {
        box-shadow:
            0 0 28px rgba(4, 237, 159, 0.50),
            0 4px 18px rgba(0, 0, 0, 0.55);
    }

    50% {
        box-shadow:
            0 0 58px rgba(4, 237, 159, 0.85),
            0 6px 24px rgba(0, 0, 0, 0.60);
    }
}

/* Primary Button */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(180deg,
            #04ee9f 0%,
            #03d99b 45%,
            #01c195 100%);
    color: #000;
    font-weight: 800;
    font-size: 18px;
    letter-spacing: 1.5px;
    padding: 16px 34px;
    border-radius: 10px;
    text-decoration: none;
    text-transform: uppercase;
    position: relative;
    overflow: hidden;
    border-top: 1px solid rgba(255, 255, 255, 0.35);
    border-bottom: 1px solid rgba(0, 0, 0, 0.20);
    transition: filter 0.2s, transform 0.15s;
    animation: btn-glow-pulse 2.5s ease-in-out infinite;
    margin: 20px 0;
}

/* shimmer sweep */
.btn-primary::after {
    content: '';
    position: absolute;
    top: -10%;
    left: 0;
    width: 38%;
    height: 120%;
    background: linear-gradient(90deg,
            transparent 0%,
            rgba(255, 255, 255, 0.60) 50%,
            transparent 100%);
    mix-blend-mode: overlay;
    transform: skewX(-22deg) translateX(-320%);
    animation: btn-shine 3s ease-in-out infinite;
    pointer-events: none;
}

.btn-primary:hover {
    filter: brightness(1.12);
    transform: translateY(-2px);
    animation-play-state: paused;
}

.btn-icon {
    font-size: 18px;
    line-height: 1;
}

/* ── Hero Visual — alternative links ── */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    height: 100%;
    margin-bottom: -100px;
}

.hero-visual .banner1 {
    width: 95%;
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translate(-50%, 0);
    z-index: 99;
}

.hero-links {
    width: 100%;
    max-width: 500px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.links-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--primary);
    margin-bottom: 4px;
    opacity: 0.85;
}

.links-label svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
    stroke: var(--primary);
}

.alt-link {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 16px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    text-decoration: none;
    color: var(--text);
    transition: border-color 0.22s, box-shadow 0.22s, background 0.22s, transform 0.18s;
}

.alt-link:hover {
    border-color: var(--primary);
    background: rgba(4, 237, 159, 0.07);
    box-shadow:
        0 0 24px rgba(4, 237, 159, 0.18),
        0 4px 16px rgba(0, 0, 0, 0.35);
    transform: translateX(4px);
}

.alt-link-num {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 25px;
    font-weight: 400;
    color: var(--primary);
    letter-spacing: 1px;
    line-height: 1;
    min-width: 28px;
    opacity: 0.85;
}

.alt-link-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.alt-link-body strong {
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.alt-link-body small {
    font-size: 14px;
    color: var(--text-muted);
    letter-spacing: 0.3px;
}

.alt-link-arrow {
    width: 20px;
    height: 20px;
    color: var(--primary);
    flex-shrink: 0;
    opacity: 0.7;
    transition: opacity 0.18s, transform 0.18s;
}

.alt-link:hover .alt-link-arrow {
    opacity: 1;
    transform: translateX(3px);
}


/* ── ABOUT + FEATURES ─────────────────────────────────── */

.about {
    padding: 80px 32px 70px;
    background: var(--bg);
    position: relative;
}

/* top glow border */
.about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg,
            transparent 0%,
            var(--primary) 35%,
            var(--primary2) 65%,
            transparent 100%);
    opacity: 0.50;
}

.container {
    max-width: 880px;
    margin: 0 auto;
}

.section-title {
    font-family: 'Bebas Neue', sans-serif;
    text-align: center;
    font-size: clamp(14px, 6vw, 50px);
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 0;
    margin-bottom: 10px;
    position: relative;
}

.about .section-title {
    left: -12.5%;
}

.section-title .accent {
    color: var(--primary);
}

.title-bar {
    display: none;
    width: 50px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary2), var(--primary));
    border-radius: 2px;
    margin: 0 auto 28px;
    box-shadow: 0 0 12px rgba(4, 237, 159, 0.55);
}

.banner2 {
    position: absolute;
    max-width: 500px;
    width: 35%;
    right: -30px;
    bottom: -10px;
}

.banner4 {
    display: none;
}

.guang {
    position: absolute;
    width: 50%;
    left: 50%;
    transform: translateX(-50%);
    bottom: 0;
}

.about-body {
    width: 100%;
    border: 1px solid var(--border);
    padding: 30px;
    border-radius: 10px;
    color: var(--text-muted);
    font-size: 15px;
    text-align: center;
    margin: 0 0 56px;
    line-height: 1.85;
    position: relative;
}

.about-body-con {
    width: 70%;
    color: #c4d79d;
}

/* Feature cards grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    position: relative;
}

.feat-card {
    background: rgba(2, 5, 9, 0.55);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 36px 20px 30px;
    text-align: center;
    transition: border-color 0.25s, box-shadow 0.25s, transform 0.22s;
}

.feat-card:hover {
    border-color: rgba(4, 237, 159, 0.55);
    box-shadow:
        0 0 28px rgba(4, 237, 159, 0.14),
        0 8px 28px rgba(0, 0, 0, 0.45);
    transform: translateY(-5px);
}

.feat-icon {
    width: 74px;
    height: 74px;
    border-radius: 50%;
    border: 2.5px solid var(--primary);
    background: rgba(4, 237, 159, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 22px;
    box-shadow:
        0 0 18px rgba(4, 237, 159, 0.30),
        inset 0 0 16px rgba(4, 237, 159, 0.07);
    transition: box-shadow 0.25s;
}

.feat-card:hover .feat-icon {
    box-shadow:
        0 0 30px rgba(4, 237, 159, 0.50),
        inset 0 0 20px rgba(4, 237, 159, 0.12);
}

.feat-icon svg {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
}

.feat-card h3 {
    font-size: 13px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    margin-bottom: 10px;
    color: #fff;
}

.feat-card p {
    color: #a8c8b0;
    font-size: 13px;
    line-height: 1.75;
}

/* ── FINAL CTA ───────────────────────────────────────── */

.cta {
    padding: 80px 32px;
    text-align: center;
    position: relative;
    background-image: linear-gradient(to top, #062627, #091e20);
}

/* top glow line */
.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg,
            transparent 0%,
            var(--primary2) 35%,
            var(--primary) 65%,
            transparent 100%);
    opacity: 0.45;
}

.cta .section-title {
    margin-bottom: 10px;
}

.cta p {
    color: var(--text-muted);
    font-size: 15px;
    margin: 14px 0 32px;
}

/* Outline Button */
.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    border: 2px solid var(--primary);
    color: var(--text);
    font-weight: 800;
    font-size: 14px;
    letter-spacing: 1.5px;
    padding: 15px 38px;
    border-radius: 50px;
    text-decoration: none;
    text-transform: uppercase;
    transition: background 0.2s, box-shadow 0.2s, transform 0.15s, border-color 0.2s;
}

.btn-outline:hover {
    background: rgba(4, 237, 159, 0.12);
    border-color: rgba(4, 237, 159, 0.90);
    box-shadow:
        0 0 32px rgba(4, 237, 159, 0.28),
        0 4px 14px rgba(0, 0, 0, 0.45);
    transform: translateY(-3px);
}

.btn-outline svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

/* ── FOOTER ──────────────────────────────────────────── */

footer {
    padding: 28px 32px 34px;
    text-align: center;
    border-top: 1px solid var(--border);
}

footer p {
    color: var(--text-muted);
    font-size: 13px;
    margin-bottom: 14px;
}

.footer-logo img {
    height: 30px;
    width: auto;
    opacity: 0.70;
}

/* ── RESPONSIVE ──────────────────────────────────────── */

@media (max-width: 800px) {
    body {
        /* background-image: url('../img/bgm.png'); */
        /* background-repeat: no-repeat;
        /* 关键设置：水平居中，垂直方向距离顶部 50px */
        background-image: none;
        padding-top: 55px;
        position: relative;
    }

    body::before {
        content: "";
        position: absolute;
        top: 200px;
        /* 控制整体下移 50px */
        left: 0;
        right: 0;
        bottom: 0;
        background-image: url('../img/bgm.png');
        background-size: cover;
        background-position: center;
        z-index: -1;
    }

    .header {
        box-sizing: border-box;
        justify-content: space-between;
        border-bottom: 0;
    }

    .header .logo {
        width: 30%;
    }

    .header .menu a {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 75px;
        height: 40px;
        text-align: center;
        border-radius: 6px;
        border: 2px solid #196f75;
        font-size: 12px;
        line-height: 1.1;
        margin-left: 5px;
    }

    .hero-inner {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 0;
        max-width: 420px;
    }

    .hero-content {
        order: 1;
        width: 100%;
    }

    .hero-visual {
        order: 2;
        margin-bottom: -20px;
        margin-top: 20px;
    }

    .hero-links {
        max-width: 100%;
    }

    .alt-link {
        text-align: left;
    }

    .hero-logo {
        text-align: center;
        margin-bottom: 10px;
    }

    .hero-logo img {
        max-width: 240px;
    }

    .hero h1 {
        width: 100%;
        font-size: 20px;
        line-height: 28px;
        margin-bottom: 15px;
    }

    .hero-desc {
        width: 100%;
        font-size: 12px;
        margin-left: auto;
        margin-right: auto;
    }

    .hero-rew {
        width: 100%;
    }

    .hero-visual {
        /* margin: 0;
        order:0; */
    }

    .hero-visual .banner1 {
        width: 90%;
        position: relative;
        left: 0;
        top: 0;
        transform: translate(0, 0);

    }

    .alt-link-num {
        font-family: 'Bebas Neue', sans-serif;
        font-size: 18px;
        font-weight: 400;
        color: var(--primary);
        letter-spacing: 1px;
        line-height: 1;
        min-width: 28px;
        opacity: 0.85;
    }

    .about .section-title {
        left: 0;
        font-size: 30px;
    }

    .alt-link-body {
        flex: 1;
        display: flex;
        flex-direction: column;
        gap: 3px;
    }

    .alt-link-body strong {
        font-size: 14px;
        font-weight: 700;
        letter-spacing: 0.5px;
    }

    .alt-link-body small {
        font-size: 12px;
        color: var(--text-muted);
        letter-spacing: 0.3px;
    }

    .title-bar {
        margin-bottom: 15px;
    }

    .about {
        background: #003737;
    }

    .about-body {
        right: 0;
        font-size: 12px;
        margin-bottom: 10px;
        padding: 15px;
    }

    .about-body-con {
        width: 100%;
        font-size: 14px;
        line-height: 1.2;
    }

    .about .banner2 {
        width: 90%;
        margin-top: 20px;
        position: relative;
        right: 0;
        bottom: 0;
    }

    .banner4 {
        display: block;
        width: 100%;
        margin: 0 auto 20px;
    }

    .alt-link {
        padding: 10px;
    }

    .btn-primary {
        font-size: 12px;
        justify-content: center;
        padding: 15px;
    }

    .features-grid {
        grid-template-columns: 1fr;
        max-width: 340px;
        right: 0;
    }

    .feat-card {
        padding: 15px 10px 15px 10px;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .feat-icon {
        width: 65px;
        height: 65px;
        margin: 10px 0 20px;
    }

    .feat-icon svg {
        width: 35px;
        height: 35px;
    }

    .feat-info {
        width: calc(100% - 60px);
        margin-left: 10px;
    }

    .feat-card h3 {
        font-size: 14px;
        margin-bottom: 5px;
        line-height: 1;
        text-align: center;
    }

    .feat-card p {
        font-size: 12px;
        line-height: 1.5;
        text-align: center;
    }

    .cta{
        padding-bottom: 0;
    }
    .cta .section-title {
        font-size: 18px;
    }

    .cta p {
        font-size: 12px;
        margin: 0 auto 20px;
    }

    .btn-outline {
        padding: 8px 20px;
        letter-spacing: 0.8px;
        gap: 8px;
        font-weight: 400;
        margin-bottom: 30px;
    }
    footer {
        border-top: 0;
        padding-top: 0;
    }

}

@media (max-width: 500px) {
    .header {
        padding: 12px 5px;
    }

    .hero {
        padding: 40px 30px 20px;
    }

    .about {
        padding: 20px 15px 20px;
    }

    .apk-section {
        padding: 20px 16px;
    }

    .cta {
        padding: 20px 16px;
    }
}