/* 前台引导页样式（仿 Applo.cc 风格） */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    /* 全局字体：优先使用 Windows 微软雅黑，其次常见中文/系统无衬线字体 */
    font-family: "Microsoft YaHei", "微软雅黑", -apple-system, BlinkMacSystemFont,
    "Segoe UI", system-ui, "PingFang SC", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
}

body {
    background: radial-gradient(circle at top, #eff6ff 0, #ffffff 45%, #f9fafb 100%);
    color: #111827;
}

a {
    color: inherit;
    text-decoration: none;
}

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

.page-wrap {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.topbar {
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 40px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand-logo {
    width: 30px;
    height: 30px;
    border-radius: 999px;
    background: radial-gradient(circle at 30% 30%, #60a5fa, #4f46e5 45%, #ec4899 70%, #f97316 100%);
    box-shadow: 0 12px 30px rgba(79, 70, 229, 0.45);
    animation: float-pulse 4s ease-in-out infinite;
}

.brand-text {
    font-size: 22px;
    font-weight: 700;
    background: linear-gradient(120deg, #2563eb, #a855f7);
    -webkit-background-clip: text;
    color: transparent;
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 20px;
    font-size: 13px;
    color: #6b7280;
}

.topbar-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.topbar-link-icon {
    font-size: 14px;
}

.hero {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
}

.hero-inner {
    max-width: 1100px;
    width: 100%;
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 32px;
}

.hero-left-title {
    font-size: 44px;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: 0.02em;
    margin-bottom: 20px;
}

.hero-left-title span.gradient {
    display: inline-block;
    background: linear-gradient(120deg, #3b82f6, #a855f7, #ec4899);
    -webkit-background-clip: text;
    color: transparent;
}

.hero-left-subtitle {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 12px;
}

.hero-left-desc {
    font-size: 16px;
    color: #4b5563;
    margin-bottom: 32px;
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.btn-primary {
    min-width: 120px;
    padding: 10px 26px;
    border-radius: 999px;
    border: none;
    background: linear-gradient(135deg, #2563eb, #4f46e5);
    box-shadow: 0 16px 40px rgba(37, 99, 235, 0.35);
    color: #ffffff;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: transform .16s ease-out, box-shadow .16s ease-out, filter .16s ease-out;
}

.btn-secondary {
    min-width: 120px;
    padding: 10px 26px;
    border-radius: 999px;
    border: 1px solid #d1d5db;
    background: #ffffff;
    color: #374151;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: transform .16s ease-out, box-shadow .16s ease-out, border-color .16s ease-out, background-color .16s ease-out;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 20px 55px rgba(37, 99, 235, 0.45);
    filter: brightness(1.03);
}

.btn-secondary:hover {
    transform: translateY(-1px);
    border-color: #9ca3af;
    box-shadow: 0 14px 32px rgba(15, 23, 42, 0.12);
}

.hero-right {
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-orbit {
    width: 320px;
    height: 320px;
    border-radius: 40px;
    background: radial-gradient(circle at 20% 0%, #e0f2fe, #bfdbfe 45%, #eff6ff 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 40px 80px rgba(15, 23, 42, 0.18);
    position: relative;
    overflow: hidden;
}

.hero-orbit-inner {
    width: 96px;
    height: 96px;
    border-radius: 28px;
    background: linear-gradient(145deg, #60a5fa, #2563eb);
    box-shadow: 0 16px 40px rgba(37, 99, 235, 0.55);
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-orbit-inner::before {
    content: "A";
    font-size: 40px;
    font-weight: 800;
    color: #ffffff;
    text-shadow: 0 4px 12px rgba(15, 23, 42, 0.35);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
}

.hero-orbit::before {
    content: "";
    position: absolute;
    inset: 10%;
    border-radius: inherit;
    background: radial-gradient(circle at 10% 0, rgba(255, 255, 255, 0.65), transparent 60%);
    pointer-events: none;
}

.support-float {
    position: fixed;
    left: 18px;
    bottom: 18px;
    z-index: 20;
}

.support-float-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    border-radius: 999px;
    background: #2563eb;
    color: #ffffff;
    font-size: 13px;
    box-shadow: 0 18px 40px rgba(37, 99, 235, 0.35);
    transition: transform .16s ease-out, box-shadow .16s ease-out, background-color .16s ease-out;
}

.support-float-btn span {
    margin-left: 6px;
}

.support-float-btn:hover {
    transform: translateY(-1px);
    background-color: #1d4ed8;
    box-shadow: 0 22px 52px rgba(37, 99, 235, 0.5);
}

@keyframes float-pulse {
    0%, 100% {
        transform: translateY(0);
        box-shadow: 0 12px 30px rgba(79, 70, 229, 0.45);
    }
    50% {
        transform: translateY(-4px);
        box-shadow: 0 20px 40px rgba(79, 70, 229, 0.55);
    }
}

@media (max-width: 900px) {
    .topbar {
        padding: 0 16px;
    }

    .hero {
        padding: 24px 16px 40px;
    }

    .hero-inner {
        grid-template-columns: minmax(0, 1fr);
        text-align: left;
    }

    .hero-right {
        order: -1;
        margin-bottom: 16px;
    }

    .hero-left-title {
        font-size: 32px;
    }

    .hero-left-subtitle {
        font-size: 24px;
    }

    .topbar-right {
        font-size: 12px;
    }
}