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

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    background: linear-gradient(145deg, #f5f1f8 0%, #fef5ed 50%, #faf0fe 100%);
    position: relative;
}

.ambient-glow {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.12;
    animation: floatGlow 12s ease-in-out infinite alternate;
    will-change: transform;
}

.glow-orb.a { width: 500px; height: 500px; background: #cbb4e0; top: -120px; right: -80px; }
.glow-orb.b { width: 400px; height: 400px; background: #fad5c2; bottom: -100px; left: -100px; animation-delay: 3s; }
.glow-orb.c { width: 350px; height: 350px; background: #dec4ee; top: 30%; left: 20%; animation-delay: 6s; opacity: 0.08; }
.glow-orb.d { width: 300px; height: 300px; background: #fed6b5; bottom: 20%; right: 10%; animation-delay: 9s; opacity: 0.1; }

@keyframes floatGlow {
    0%   { transform: translate(0, 0) scale(1); }
    100% { transform: translate(40px, 50px) scale(1.15); }
}

.main-container {
    width: 100%;
    max-width: 520px;
    position: relative;
    z-index: 1;
    background: rgba(255, 255, 255, 0.45);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-radius: 48px;
    padding: 32px 26px;
    border: 1px solid rgba(255, 255, 255, 0.5);
    box-shadow: 0 20px 60px rgba(74, 17, 36, 0.04);
    animation: cardFloat 4s ease-in-out infinite alternate;
}

@keyframes cardFloat {
    0%   { transform: translateY(0px); }
    100% { transform: translateY(-6px); }
}

.content-grid {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 18px;
    width: 100%;
}

.logo-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    margin-bottom: 2px;
}

.logo-img {
    width: 100%;
    max-width: 260px;
    height: auto;
    border-radius: 8px;
    object-fit: contain;
    background: transparent;
    filter: drop-shadow(0 2px 10px rgba(74, 17, 36, 0.02));
}

.brand-sub {
    font-size: 12px;
    color: #8b7a8e;
    letter-spacing: 4px;
    margin-top: 6px;
    font-weight: 300;
}

.hero-title {
    text-align: center;
    width: 100%;
}

.main-title {
    font-size: 30px;
    font-weight: 900;
    color: #3a2844;
    line-height: 1.2;
    letter-spacing: 1px;
}

.main-title .highlight {
    background: linear-gradient(135deg, #c25d2a, #e8812e);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sub-title {
    display: inline-block;
    background: rgba(194, 93, 42, 0.06);
    padding: 4px 22px;
    border-radius: 30px;
    font-size: 13px;
    color: #7b5c51;
    letter-spacing: 3px;
    border: 1px solid rgba(194, 93, 42, 0.04);
    margin-top: 2px;
}

.features-flex {
    display: flex;
    flex-direction: column;
    gap: 14px;
    width: 100%;
    margin: 4px 0;
}

.feature-card {
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    border-radius: 18px;
    padding: 22px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 8px;
    transition: all 0.25s ease;
    border: 1px solid rgba(255, 255, 255, 0.25);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
}

.feature-card:hover {
    transform: translateY(-3px);
    background: rgba(255, 255, 255, 0.65);
    border-color: rgba(194, 93, 42, 0.12);
}

.f-icon {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, rgba(194, 93, 42, 0.08), rgba(232, 129, 46, 0.05));
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: #b04d26;
    flex-shrink: 0;
    border: 1px solid rgba(194, 93, 42, 0.04);
    margin-bottom: 4px;
}

.f-text h4 {
    font-size: 17px;
    font-weight: 700;
    color: #3a2844;
}

.f-text p {
    font-size: 13px;
    color: #6f5c66;
    font-weight: 300;
}

.cta-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
    margin: 6px 0 4px;
}

.btn-download {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;         /* 图标与文字间距略微增大 */
    width: 100%;
    padding: 17px 0;
    border-radius: 50px;
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    text-align: center;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    letter-spacing: 2px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.btn-download:hover {
    transform: scale(1.02);
    box-shadow: 0 6px 30px rgba(0, 0, 0, 0.12);
}

.btn-android {
    background: linear-gradient(135deg, #7e5a7c, #593e56);
    box-shadow: 0 4px 16px rgba(89, 62, 86, 0.2);
}

.btn-android:hover {
    box-shadow: 0 6px 24px rgba(89, 62, 86, 0.3);
}

.btn-ios {
    background: linear-gradient(135deg, #c25d2a, #e8812e);
    box-shadow: 0 4px 16px rgba(194, 93, 42, 0.25);
}

.btn-ios:hover {
    box-shadow: 0 6px 24px rgba(194, 93, 42, 0.35);
}

/* ✅ 调整后的图标尺寸 */
.btn-icon {
    width: 23px;
    height: 23px;
    object-fit: contain;   /* 保持 56×56 原图的清晰比例 */
    display: block;
    flex-shrink: 0;
}

.security-info {
    text-align: center;
    margin-top: 2px;
    font-size: 12px;
    color: rgba(74, 17, 36, 0.3);
    letter-spacing: 2px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 6px;
}

.bottom-decoration {
    width: 100%;
    height: 100px;
    background: rgba(255, 255, 255, 0.25);
    border-radius: 30px;
    display: flex;
    justify-content: center;
    align-items: center;
    border: 1px solid rgba(255, 255, 255, 0.3);
    position: relative;
    margin-top: 6px;
}

.bottom-decoration .deco-icon {
    font-size: 44px;
    font-weight: 900;
    background: linear-gradient(135deg, #e2cfc9, #dec4ee);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    opacity: 0.4;
}

.bottom-decoration .deco-sub {
    font-size: 22px;
    position: absolute;
    bottom: 15px;
    right: 20px;
    opacity: 0.15;
    transform: rotate(-8deg);
    color: #593e56;
}

@media (max-width: 380px) {
    .main-container { padding: 20px 16px; }
    .main-title { font-size: 26px; }
    .logo-img { max-width: 180px; }
    .btn-download { font-size: 16px; padding: 14px 0; }
    .btn-icon { width: 22px; height: 22px; }  /* 小屏幕稍缩小 */
}