/* ---------- 基础 ---------- */
:root {
    --ink: #1b1b1a;
    --ink-soft: #45423e;
    --muted: #6f6b66;
    --line: #e3e0d9;
    --line-soft: #eeece7;
    --paper: #faf9f7;
    --code-bg: #f0eee9;
}

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

html {
    -webkit-text-size-adjust: 100%;
}

body {
    background: var(--paper);
    color: var(--ink);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 15px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}

.wrap {
    width: 100%;
    max-width: 760px;
    margin: 0 auto;
    padding: 0 24px;
}

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

code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.88em;
    background: var(--code-bg);
    padding: 1px 5px;
    border-radius: 3px;
}

/* ---------- 顶栏 ---------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: rgba(250, 249, 247, 0.9);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--line-soft);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.brand img {
    border-radius: 6px;
    display: block;
}

.nav {
    display: flex;
    gap: 22px;
}

.nav a {
    font-size: 14px;
    color: var(--muted);
    transition: color 0.15s ease;
}

.nav a:hover {
    color: var(--ink);
}

/* ---------- 首屏 ---------- */
.intro {
    padding: 76px 0 44px;
}

.intro h1 {
    font-size: clamp(34px, 6vw, 52px);
    font-weight: 600;
    line-height: 1.08;
    letter-spacing: -0.035em;
}

.lead {
    margin-top: 22px;
    font-size: 17px;
    line-height: 1.8;
    color: var(--ink-soft);
    max-width: 620px;
}

.lead.sub {
    margin-top: 10px;
    font-size: 15px;
    color: var(--muted);
}

.actions {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-top: 32px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--ink);
    color: var(--paper);
    font-size: 14px;
    font-weight: 500;
    padding: 11px 22px;
    border-radius: 5px;
    transition: background 0.15s ease;
}

.btn:hover {
    background: #34332f;
}

.text-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--muted);
    transition: color 0.15s ease;
}

.text-link svg {
    transition: transform 0.15s ease;
}

.text-link:hover {
    color: var(--ink);
}

.text-link:hover svg {
    transform: translateX(2px);
}

/* ---------- 截图 ---------- */
.shots {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    padding-bottom: 8px;
}

.shot {
    border: 1px solid var(--line);
    border-radius: 6px;
    overflow: hidden;
    background: #fff;
}

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

/* ---------- 区块 ---------- */
.section {
    margin-top: 72px;
    padding-top: 36px;
    border-top: 1px solid var(--line);
}

.section h2 {
    font-size: 17px;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 8px;
}

.note {
    font-size: 14px;
    color: var(--muted);
    margin: 8px 0 26px;
}

/* ---------- 功能列表 ---------- */
.feature-list {
    margin-top: 18px;
}

.feature-list .row {
    display: grid;
    grid-template-columns: 104px 1fr;
    gap: 24px;
    padding: 15px 0;
    border-bottom: 1px solid var(--line-soft);
}

.feature-list .row:last-child {
    border-bottom: none;
}

.feature-list dt {
    font-size: 14px;
    font-weight: 600;
    color: var(--ink);
}

.feature-list dd {
    font-size: 14.5px;
    color: var(--ink-soft);
}

/* ---------- 安装步骤 ---------- */
.steps {
    list-style: none;
    counter-reset: step;
    margin-top: 4px;
}

.steps li {
    counter-increment: step;
    position: relative;
    padding-left: 42px;
    margin-bottom: 24px;
}

.steps li:last-child {
    margin-bottom: 0;
}

.steps li::before {
    content: counter(step);
    position: absolute;
    left: 0;
    top: 2px;
    width: 22px;
    height: 22px;
    border: 1px solid var(--line);
    border-radius: 50%;
    font-size: 12px;
    line-height: 20px;
    text-align: center;
    color: var(--muted);
}

.steps h3 {
    font-size: 14.5px;
    font-weight: 600;
    margin-bottom: 2px;
}

.steps p {
    font-size: 14.5px;
    color: var(--ink-soft);
}

.section .actions {
    margin-top: 30px;
}

/* ---------- 页脚 ---------- */
.site-footer {
    margin-top: 88px;
    border-top: 1px solid var(--line);
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 26px 0 44px;
    font-size: 13px;
    color: var(--muted);
}

.footer-inner a:hover {
    color: var(--ink);
}

/* ---------- 移动端 ---------- */
@media (max-width: 640px) {
    .intro {
        padding: 52px 0 34px;
    }

    .lead {
        font-size: 16px;
    }

    .shots {
        grid-template-columns: 1fr;
    }

    .section {
        margin-top: 56px;
        padding-top: 30px;
    }

    .feature-list .row {
        grid-template-columns: 1fr;
        gap: 2px;
        padding: 14px 0;
    }

    .actions {
        gap: 18px;
        flex-wrap: wrap;
    }

    .nav {
        gap: 16px;
    }
}