/*
 * 宣传首页（§7.10）
 *
 * 独立于 kronos.css 的一层：落地页不需要后台布局那一套栅格/表格/表单，
 * 但复用同一套配色变量（:root 在 kronos.css 里定义）。
 * 只用 CSS/SVG 做视觉，不引任何外部库、不加载任何背景大图。
 */

body.kn-landing {
    background:
            radial-gradient(1400px 700px at 15% -10%, rgba(79, 209, 197, .14), transparent 62%),
            radial-gradient(1000px 600px at 88% 2%, rgba(201, 162, 39, .10), transparent 58%),
            var(--kn-bg);
    color: var(--kn-text);
    font-family: var(--kn-sans);
    font-size: 15px;
    line-height: 1.7;
    margin: 0;
    -webkit-font-smoothing: antialiased;
}

.kn-landing-wrap {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 20px;
}

.kn-landing a {
    color: inherit;
}

/* 落地页按钮要更大更醒目（后台那套偏紧凑） */
.kn-btn-lg {
    padding: 11px 22px;
    font-size: 15px;
}

/* ---------------------------------------------------------------- 顶栏 */

.kn-landing-header {
    position: sticky;
    top: 0;
    z-index: 30;
    backdrop-filter: blur(10px);
    background: rgba(10, 14, 22, .82);
    border-bottom: 1px solid var(--kn-border);
}

.kn-landing-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    height: 64px;
}

.kn-landing-header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 0 0 auto;
}

/* ---------------------------------------------------------------- 首屏 */

.kn-landing-hero {
    position: relative;
    overflow: hidden;
    padding: 72px 0 64px;
}

/* 缓慢流动的六边形网格：纯 CSS，无图片 */
.kn-landing-grid-bg {
    position: absolute;
    inset: -20% -10% auto -10%;
    height: 140%;
    background-image:
            linear-gradient(rgba(79, 209, 197, .07) 1px, transparent 1px),
            linear-gradient(90deg, rgba(79, 209, 197, .07) 1px, transparent 1px);
    background-size: 46px 46px;
    transform: perspective(600px) rotateX(48deg);
    mask-image: radial-gradient(60% 60% at 50% 30%, #000 30%, transparent 100%);
    -webkit-mask-image: radial-gradient(60% 60% at 50% 30%, #000 30%, transparent 100%);
    animation: kn-landing-drift 22s linear infinite;
    pointer-events: none;
}

@keyframes kn-landing-drift {
    from { background-position: 0 0, 0 0; }
    to { background-position: 46px 92px, 46px 92px; }
}

.kn-landing-hero-inner {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 40px;
    align-items: center;
}

.kn-landing-eyebrow {
    /* 它在 <h1> 里（游戏名要出现在标题层级中），所以要 block + 宽度自适应才独占一行 */
    display: block;
    width: fit-content;
    margin-bottom: 10px;
    padding: 4px 10px;
    border: 1px solid var(--kn-border);
    border-radius: 999px;
    color: var(--kn-primary);
    font-size: 12.5px;
    letter-spacing: .04em;
}

.kn-landing-hero h1 {
    margin: 14px 0 0;
    font-size: 44px;
    line-height: 1.18;
    letter-spacing: .01em;
}

.kn-landing-glow {
    color: var(--kn-primary);
    text-shadow: 0 0 24px rgba(79, 209, 197, .45);
}

.kn-landing-lead {
    margin: 16px 0 0;
    max-width: 620px;
    color: var(--kn-text-dim, #b6c2d4);
    font-size: 15.5px;
}

.kn-landing-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 24px;
}

.kn-landing-stats {
    display: grid;
    /* 与仪表盘顶部四张卡片一一对应，所以就是四列（手机端两列两行） */
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    margin-top: 34px;
    padding-top: 22px;
    border-top: 1px solid var(--kn-border);
}

.kn-landing-stat b {
    display: block;
    color: var(--kn-primary);
    font-family: var(--kn-mono);
    font-size: 26px;
    line-height: 1.2;
}

.kn-landing-stat span {
    color: var(--kn-muted);
    font-size: 12.5px;
}

/* 「数据实时同步」提示：数字是活的时候要让人知道它是活的 */
.kn-landing-live {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 12px;
    color: var(--kn-muted);
    font-size: 12px;
}

.kn-live-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--kn-primary);
    box-shadow: 0 0 0 0 rgba(79, 209, 197, .5);
    animation: kn-live-pulse 2s ease-out infinite;
}

@keyframes kn-live-pulse {
    0% { box-shadow: 0 0 0 0 rgba(79, 209, 197, .5); }
    70% { box-shadow: 0 0 0 8px rgba(79, 209, 197, 0); }
    100% { box-shadow: 0 0 0 0 rgba(79, 209, 197, 0); }
}

/* 首屏右侧：八部位环绕的 Total Power 核心 */
.kn-landing-hero-art {
    display: flex;
    justify-content: center;
}

.kn-orbit {
    position: relative;
    width: 330px;
    height: 330px;
}

.kn-orbit-core {
    position: absolute;
    inset: 50% auto auto 50%;
    transform: translate(-50%, -50%);
    width: 148px;
    height: 148px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    border: 1px solid rgba(79, 209, 197, .5);
    border-radius: 50%;
    background: radial-gradient(circle at 50% 40%, rgba(79, 209, 197, .18), rgba(20, 27, 43, .9) 70%);
    box-shadow: 0 0 48px rgba(79, 209, 197, .22);
}

.kn-orbit-label {
    color: var(--kn-muted);
    font-size: 11px;
    letter-spacing: .08em;
}

.kn-orbit-value {
    color: var(--kn-primary);
    font-family: var(--kn-mono);
    font-size: 38px;
    line-height: 1.1;
}

.kn-orbit-sub {
    color: var(--kn-muted);
    font-size: 11px;
}

.kn-orbit-node {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 84px;
    padding: 3px 0;
    border: 1px solid var(--kn-border);
    border-radius: 999px;
    background: rgba(20, 27, 43, .92);
    color: var(--kn-text-dim, #b6c2d4);
    font-size: 11px;
    text-align: center;
    transform:
            translate(-50%, -50%)
            rotate(calc(var(--i) * 45deg))
            translateY(-148px)
            rotate(calc(var(--i) * -45deg));
}

/* ---------------------------------------------------------------- 段落通用 */

.kn-landing-section {
    padding: 62px 0;
    border-top: 1px solid var(--kn-border);
}

.kn-landing-section-alt {
    background: linear-gradient(180deg, rgba(20, 27, 43, .55), transparent);
}

.kn-landing-h2 {
    margin: 0 0 8px;
    font-size: 27px;
    letter-spacing: .02em;
}

.kn-landing-sub {
    margin: 0 0 26px;
    color: var(--kn-muted);
    font-size: 13.5px;
}

/* ---------------------------------------------------------------- 痛点 */

.kn-landing-pain {
    display: grid;
    gap: 14px;
}

.kn-pain-item {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 0;
    border: 1px solid var(--kn-border);
    border-radius: var(--kn-radius);
    overflow: hidden;
    background: var(--kn-panel);
}

.kn-pain-before,
.kn-pain-after {
    padding: 16px 18px;
    font-size: 14px;
}

.kn-pain-before {
    color: var(--kn-muted);
    background: rgba(10, 14, 22, .55);
    border-right: 1px solid var(--kn-border);
}

.kn-pain-before::before {
    content: "以前";
    display: block;
    margin-bottom: 6px;
    color: var(--kn-danger, #e56b6f);
    font-size: 11px;
    letter-spacing: .1em;
}

.kn-pain-after::before {
    content: "现在";
    display: block;
    margin-bottom: 6px;
    color: var(--kn-primary);
    font-size: 11px;
    letter-spacing: .1em;
}

/* ---------------------------------------------------------------- 能力卡片 */

.kn-landing-cards {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.kn-landing-card {
    padding: 18px;
    border: 1px solid var(--kn-border);
    border-radius: var(--kn-radius);
    background: var(--kn-panel);
    transition: transform .18s ease, border-color .18s ease;
}

.kn-landing-card:hover {
    transform: translateY(-3px);
    border-color: rgba(79, 209, 197, .45);
}

.kn-landing-card h3 {
    margin: 0 0 8px;
    font-size: 16px;
    color: var(--kn-text);
}

.kn-landing-card p {
    margin: 0;
    color: var(--kn-text-dim, #b6c2d4);
    font-size: 13.5px;
}

/* ---------------------------------------------------------------- 截图 */

.kn-landing-shots {
    display: grid;
    gap: 22px;
}

.kn-shot {
    margin: 0;
    border: 1px solid var(--kn-border);
    border-radius: var(--kn-radius);
    overflow: hidden;
    background: var(--kn-panel);
    box-shadow: var(--kn-shadow);
}

.kn-shot img {
    display: block;
    width: 100%;
    height: auto;
}

.kn-shot figcaption {
    display: flex;
    align-items: baseline;
    gap: 10px;
    padding: 10px 14px;
    border-top: 1px solid var(--kn-border);
    font-size: 13px;
}

.kn-shot figcaption span {
    color: var(--kn-muted);
    font-size: 12.5px;
}

/* ---------------------------------------------------------------- FAQ */

.kn-landing-faq {
    display: grid;
    gap: 10px;
}

.kn-landing-faq details {
    border: 1px solid var(--kn-border);
    border-radius: var(--kn-radius-sm, 8px);
    background: var(--kn-panel);
    padding: 12px 16px;
}

.kn-landing-faq summary {
    cursor: pointer;
    font-size: 14.5px;
    color: var(--kn-text);
}

.kn-landing-faq p {
    margin: 10px 0 2px;
    color: var(--kn-text-dim, #b6c2d4);
    font-size: 13.5px;
}

/* ---------------------------------------------------------------- 转化 */

.kn-landing-open {
    padding: 62px 0;
    border-top: 1px solid var(--kn-border);
    background:
            radial-gradient(700px 340px at 20% 0%, rgba(79, 209, 197, .12), transparent 60%),
            linear-gradient(180deg, rgba(20, 27, 43, .6), transparent);
}

.kn-landing-open-inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 40px;
    align-items: center;
}

.kn-landing-steps {
    margin: 18px 0 0;
    padding-left: 22px;
    color: var(--kn-text-dim, #b6c2d4);
    font-size: 14px;
}

.kn-landing-steps li {
    margin-bottom: 10px;
}

.kn-landing-steps b {
    color: var(--kn-text);
}

.kn-landing-steps span {
    display: block;
    color: var(--kn-muted);
    font-size: 12.5px;
}

.kn-landing-qr {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 16px;
    border: 1px solid var(--kn-border);
    border-radius: var(--kn-radius);
    background: var(--kn-panel);
}

.kn-landing-qr img {
    width: 190px;
    height: 190px;
    object-fit: contain;
    background: #fff;
    border-radius: 10px;
    padding: 6px;
}

.kn-landing-qr-tip {
    color: var(--kn-muted);
    font-size: 12.5px;
}

/* ---------------------------------------------------------------- 页脚 */

.kn-landing-footer {
    padding: 26px 0 40px;
    border-top: 1px solid var(--kn-border);
    color: var(--kn-muted);
    font-size: 12.5px;
}

.kn-landing-footer .kn-landing-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.kn-landing-footer strong {
    display: block;
    color: var(--kn-text);
    font-size: 13.5px;
}

/* ---------------------------------------------------------------- 滚动入场 */

.kn-reveal {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity .5s ease, transform .5s ease;
}

.kn-reveal.is-in {
    opacity: 1;
    transform: none;
}

/* 尊重「减少动效」偏好 */
@media (prefers-reduced-motion: reduce) {
    .kn-landing-grid-bg { animation: none; }
    .kn-live-dot { animation: none; }
    .kn-reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------------------------------------------------------------- 响应式（手机优先的观感） */

@media (max-width: 980px) {
    .kn-landing-hero-inner,
    .kn-landing-open-inner {
        grid-template-columns: minmax(0, 1fr);
    }

    .kn-landing-hero-art {
        order: -1;
    }

    .kn-landing-cards {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 720px) {
    .kn-landing-hero {
        padding: 40px 0 44px;
    }

    .kn-landing-hero h1 {
        font-size: 31px;
    }

    .kn-landing-section,
    .kn-landing-open {
        padding: 42px 0;
    }

    .kn-landing-stats {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 12px;
    }
    .kn-landing-stat b {
        font-size: 22px;
    }

    .kn-landing-cards {
        grid-template-columns: minmax(0, 1fr);
    }

    .kn-pain-item {
        grid-template-columns: minmax(0, 1fr);
    }

    .kn-pain-before {
        border-right: none;
        border-bottom: 1px solid var(--kn-border);
    }

    .kn-orbit {
        width: 260px;
        height: 260px;
    }

    .kn-orbit-node {
        transform:
                translate(-50%, -50%)
                rotate(calc(var(--i) * 45deg))
                translateY(-116px)
                rotate(calc(var(--i) * -45deg));
    }

    .kn-landing-cta {
        gap: 10px;
    }

    .kn-landing-cta .kn-btn {
        width: 100%;
        text-align: center;
    }
}