/* ─────────────────────────────
   Survev 竞技场 官网样式
   简约军事大逃杀风
───────────────────────────── */

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

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: #fff;
    background: #0d1117;
    min-height: 100vh;
    overflow-x: hidden;
}

/* 全屏背景 + 遮罩 */
body {
    background-image: url("../img/background.png");
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.bg-overlay {
    position: fixed;
    inset: 0;
    background: linear-gradient(
        180deg,
        rgba(10, 15, 12, 0.82) 0%,
        rgba(13, 17, 23, 0.78) 50%,
        rgba(8, 10, 8, 0.92) 100%
    );
    z-index: -1;
}

/* 主内容 */
.hero {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    padding: 60px 20px 40px;
}

.hero-content {
    max-width: 860px;
    width: 100%;
    text-align: center;
}

/* 图标 */
.game-icon {
    width: 96px;
    height: 96px;
    border-radius: 22px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.55), 0 0 0 3px rgba(255, 255, 255, 0.12);
    margin-bottom: 18px;
    transition: transform 0.3s ease;
}
.game-icon:hover {
    transform: scale(1.05);
}

/* 标题图 */
.game-title {
    width: min(520px, 85vw);
    margin: 0 auto 14px;
    display: block;
    filter: drop-shadow(0 6px 24px rgba(0, 0, 0, 0.6));
}

/* 标语 */
.tagline {
    font-size: 16px;
    color: #cfe8c0;
    letter-spacing: 2px;
    margin-bottom: 30px;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.7);
}

/* 下载按钮 */
.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 18px 44px;
    font-size: 22px;
    font-weight: 800;
    color: #1a2418;
    background: linear-gradient(135deg, #ffd700, #ffaa00);
    border-radius: 14px;
    text-decoration: none;
    box-shadow: 0 10px 34px rgba(255, 170, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.4);
    transition: all 0.25s ease;
    animation: btnPulse 2.2s ease-in-out infinite;
}

.download-btn:hover {
    transform: translateY(-3px) scale(1.03);
    box-shadow: 0 16px 44px rgba(255, 170, 0, 0.5);
    background: linear-gradient(135deg, #ffe45e, #ffbb33);
}

.download-btn:active {
    transform: translateY(0) scale(0.98);
}

.download-icon {
    font-size: 26px;
}

@keyframes btnPulse {
    0%, 100% { box-shadow: 0 10px 34px rgba(255, 170, 0, 0.35); }
    50% { box-shadow: 0 10px 44px rgba(255, 170, 0, 0.6); }
}

.download-note {
    margin-top: 12px;
    font-size: 13px;
    color: #9fb09a;
}

/* 简介 */
.intro {
    margin: 56px auto 0;
    max-width: 720px;
    padding: 34px 30px;
    background: rgba(13, 20, 16, 0.72);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    backdrop-filter: blur(8px);
    text-align: left;
}

.intro h2 {
    font-size: 24px;
    color: #ffd700;
    margin-bottom: 14px;
    text-align: center;
}

.intro p {
    line-height: 1.85;
    font-size: 15px;
    color: #dfe6dd;
    text-align: center;
}

.intro strong {
    color: #fff;
}

/* 特色卡片 */
.features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-top: 24px;
}

.feature {
    padding: 18px 16px;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: background 0.25s ease, transform 0.25s ease;
}

.feature:hover {
    background: rgba(255, 215, 0, 0.08);
    transform: translateY(-3px);
}

.feature h3 {
    font-size: 17px;
    color: #ffe45e;
    margin-bottom: 8px;
}

.feature p {
    font-size: 13px;
    color: #c3ccc0;
    line-height: 1.6;
    text-align: left;
}

/* 页脚 */
.footer {
    margin-top: 50px;
    font-size: 14px;
    color: #94a58d;
}

.footer strong {
    color: #ffd700;
}

/* 手机响应式 */
@media (max-width: 600px) {
    .hero { padding-top: 40px; }
    .game-icon { width: 80px; height: 80px; }
    .tagline { font-size: 13px; letter-spacing: 1px; }
    .download-btn { font-size: 18px; padding: 15px 30px; }
    .features { grid-template-columns: 1fr; }
    .intro { padding: 24px 18px; }
    .intro h2 { font-size: 20px; }
}