/* 站点样式：跟软件界面同一套科技风配色 */
:root {
    --bg: #070b12;
    --surface: #0e1520;
    --border: #1e2f44;
    --border-hi: #2f5a80;
    --accent: #2eb8ff;
    --accent2: #00d4ff;
    --text: #dce8f6;
    --dim: #7e94ac;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
    line-height: 1.7;
}

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 22px; }

/* 顶部导航 */
.nav {
    position: sticky; top: 0; z-index: 10;
    background: rgba(7, 11, 18, .88);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(8px);
}
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.brand { font-size: 19px; font-weight: 700; color: #fff; letter-spacing: .5px; }
.nav nav { display: flex; gap: 18px; align-items: center; font-size: 14px; }
.nav nav a { color: var(--dim); text-decoration: none; }
.nav nav a:hover { color: var(--accent); }
.who { color: var(--accent); font-size: 13px; }
.ghost {
    border: 1px solid var(--border-hi); border-radius: 8px;
    padding: 6px 14px; color: var(--text) !important;
}

/* 首屏 */
.hero { padding: 78px 0 44px; }
.hero.small { padding: 56px 0 24px; }
.hero h1 { font-size: 42px; margin: 0 0 14px; color: #fff; letter-spacing: 1px; }
.lead { color: var(--dim); font-size: 16px; max-width: 720px; }
.cta { display: flex; gap: 14px; margin-top: 26px; flex-wrap: wrap; }
.tiny { color: #5f7387; font-size: 12.5px; margin-top: 14px; }

/* 按钮 */
.btn {
    display: inline-block; padding: 12px 26px; border-radius: 10px;
    background: linear-gradient(135deg, #1d8ec4, #2eb8ff);
    border: 1px solid var(--accent);
    color: #fff !important; font-weight: 700; text-decoration: none;
    font-size: 15px; cursor: pointer;
}
.btn.line { background: transparent; color: var(--accent) !important; }
.btn.off { background: #17324a; border-color: #244a68; color: #7fa3c0 !important; cursor: not-allowed; }
.btn:hover { filter: brightness(1.12); }

/* 板块 */
section { padding: 46px 0; border-top: 1px solid var(--border); }
section h2 { font-size: 24px; margin: 0 0 8px; color: #fff; }
.sub { color: var(--dim); font-size: 14px; margin-bottom: 24px; }

/* 功能卡片 */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: 14px; padding: 20px 22px;
}
.card h3 { margin: 0 0 8px; font-size: 17px; color: var(--accent); }
.card p { margin: 0; color: var(--dim); font-size: 14px; }

/* 等级 */
.levels { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; }
.lv {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: 14px; padding: 18px;
}
.lv .lvname { font-weight: 700; font-size: 16px; margin-bottom: 6px; }
.lv .lvdesc { color: var(--dim); font-size: 13px; }
.lv1 .lvname { color: #9fb6cc; }
.lv2 .lvname { color: #2eb8ff; }
.lv3 .lvname { color: #00d4ff; }
.lv4 .lvname { color: #ffcf5c; }
.lv5 .lvname { color: #ff8a5c; }

.badge {
    display: inline-block; padding: 2px 12px; border-radius: 999px;
    font-size: 13px; border: 1px solid var(--border-hi); color: var(--accent);
}

/* 下载 */
.dl { display: flex; gap: 14px; flex-wrap: wrap; }

/* 注册登录 */
.auth { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 18px; }
.box {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: 16px; padding: 24px; display: flex; flex-direction: column; gap: 14px;
}
.box.narrow { max-width: 460px; }
.box h3 { margin: 0; font-size: 17px; color: #fff; }
.box label { display: flex; flex-direction: column; gap: 6px; font-size: 13.5px; color: var(--dim); }
.box input {
    background: #0a1220; border: 1px solid var(--border); border-radius: 9px;
    padding: 11px 13px; color: var(--text); font-size: 14px; outline: none;
}
.box input:focus { border-color: var(--accent); }
.box .btn { margin-top: 6px; text-align: center; }

.flash {
    margin: 18px 0 0; padding: 12px 18px; border-radius: 10px;
    background: #10243a; border: 1px solid var(--border-hi); color: var(--accent);
    font-size: 14px;
}

footer {
    margin-top: 40px; padding: 26px 0; border-top: 1px solid var(--border);
    color: #4f6276; font-size: 13px;
}
footer .wrap { display: flex; gap: 10px; flex-wrap: wrap; }