/* ===========================================================
   tbgjx.cn  —  「蓝色启动器」主题
   class 前缀 tg-  |  单文件  |  零 JS  |  手写
   =========================================================== */

:root {
    --ink: #0a1b33;
    --ink2: #16304f;
    --blue: #1668e3;
    --blue-d: #0d4fae;
    --blue-l: #e8f1fd;
    --sky: #58b6ff;
    --ice: #f2f7fd;
    --paper: #ffffff;
    --line: #d8e6f6;
    --line2: #e8f0fa;
    --mut: #5c7189;
    --dim: #8497ab;
    --ok: #12a06a;
    --warn: #c2600a;
    --warnbg: #fff6e8;
    --mono: "Cascadia Mono", "JetBrains Mono", Consolas, "Courier New", monospace;
    --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
            "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
    --sh: 0 1px 2px rgba(10, 27, 51, .06), 0 8px 24px rgba(10, 27, 51, .06);
    --sh-l: 0 18px 48px rgba(13, 79, 174, .18);
}

* { box-sizing: border-box; }

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

body {
    margin: 0;
    font-family: var(--sans);
    font-size: 15.5px;
    line-height: 1.75;
    color: var(--ink2);
    background: var(--paper);
    -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; }

a { color: var(--blue-d); text-decoration: none; }
a:hover { text-decoration: underline; }

code, kbd, pre { font-family: var(--mono); }

.wrap {
    max-width: 1160px;
    margin: 0 auto;
    padding: 0 24px;
}

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

.top {
    position: sticky;
    top: 0;
    z-index: 40;
    background: rgba(255, 255, 255, .94);
    backdrop-filter: saturate(1.4) blur(8px);
    border-bottom: 1px solid var(--line);
}

.top-in {
    display: flex;
    align-items: center;
    gap: 24px;
    height: 62px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 9px;
    font-size: 16.5px;
    font-weight: 700;
    color: var(--ink);
    letter-spacing: -.2px;
    white-space: nowrap;
}

.brand:hover { text-decoration: none; }

.mark {
    width: 26px;
    height: 26px;
    border-radius: 7px;
    background: linear-gradient(140deg, var(--blue) 0%, #0b3f92 100%);
    display: grid;
    place-items: center;
    flex: 0 0 auto;
    box-shadow: 0 2px 8px rgba(22, 104, 227, .38);
}

.mark svg { width: 15px; height: 15px; display: block; }

.nav {
    display: flex;
    align-items: center;
    gap: 2px;
    margin-left: auto;
    flex-wrap: wrap;
}

.nav a {
    padding: 6px 11px;
    border-radius: 7px;
    font-size: 14px;
    color: #43566d;
    white-space: nowrap;
}

.nav a:hover { background: var(--blue-l); color: var(--blue-d); text-decoration: none; }

.nav a.cur { color: var(--blue-d); font-weight: 650; background: var(--blue-l); }

.nav-dl {
    margin-left: 10px;
    padding: 7px 15px !important;
    border-radius: 8px !important;
    background: var(--blue);
    color: #fff !important;
    font-weight: 650;
    box-shadow: 0 2px 10px rgba(22, 104, 227, .3);
}

.nav-dl:hover { background: var(--blue-d) !important; }

.menu { display: none; }
.menu-btn { display: none; }

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

.hero {
    position: relative;
    overflow: hidden;
    background:
        radial-gradient(900px 420px at 84% -8%, rgba(88, 182, 255, .22), transparent 62%),
        radial-gradient(680px 380px at 6% 108%, rgba(22, 104, 227, .1), transparent 66%),
        linear-gradient(180deg, #f7fbff 0%, #ffffff 74%);
    border-bottom: 1px solid var(--line2);
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(to right, rgba(22, 104, 227, .055) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(22, 104, 227, .055) 1px, transparent 1px);
    background-size: 46px 46px;
    mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
    -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
    pointer-events: none;
}

.hero-in {
    position: relative;
    display: grid;
    grid-template-columns: 1.04fr .96fr;
    gap: 48px;
    align-items: center;
    padding: 62px 0 66px;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--mono);
    font-size: 11.5px;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--blue-d);
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 5px 13px 5px 10px;
    margin-bottom: 20px;
    box-shadow: 0 1px 3px rgba(10, 27, 51, .05);
}

.eyebrow i {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--ok);
    box-shadow: 0 0 0 3px rgba(18, 160, 106, .16);
    flex: 0 0 auto;
}

h1 {
    margin: 0 0 16px;
    font-size: clamp(33px, 4.3vw, 51px);
    line-height: 1.16;
    letter-spacing: -1.3px;
    font-weight: 800;
    color: var(--ink);
    text-wrap: balance;
}

h1 em {
    font-style: normal;
    background: linear-gradient(96deg, var(--blue) 0%, #0a52c0 62%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    white-space: nowrap;
}

.lead {
    margin: 0 0 26px;
    font-size: 16.5px;
    line-height: 1.72;
    color: #4a5f77;
    max-width: 30em;
}

.lead b { color: var(--ink); font-weight: 650; }

/* 按钮区 */

.btnrow { display: flex; flex-wrap: wrap; gap: 12px; align-items: stretch; }

.btn-dl {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 1px;
    min-width: 302px;
    padding: 14px 26px 15px;
    border-radius: 11px;
    background: linear-gradient(172deg, #2a7bf0 0%, var(--blue) 44%, #0b4899 100%);
    color: #fff;
    box-shadow: 0 10px 26px rgba(13, 79, 174, .32), inset 0 1px 0 rgba(255, 255, 255, .24);
    transition: transform .16s ease, box-shadow .16s ease;
}

.btn-dl:hover {
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: 0 16px 34px rgba(13, 79, 174, .38), inset 0 1px 0 rgba(255, 255, 255, .3);
}

.btn-dl .t {
    display: flex;
    align-items: center;
    gap: 9px;
    font-size: 18.5px;
    font-weight: 700;
    letter-spacing: -.2px;
}

.btn-dl .t svg { width: 17px; height: 17px; flex: 0 0 auto; }

.btn-dl .s {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: .03em;
    opacity: .87;
    font-weight: 500;
}

.btn-ghost {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 1px;
    padding: 13px 22px 14px;
    border-radius: 11px;
    background: #fff;
    border: 1.5px solid var(--line);
    color: var(--ink);
    box-shadow: 0 1px 3px rgba(10, 27, 51, .05);
}

.btn-ghost:hover { text-decoration: none; border-color: #b9d4f5; background: #fbfdff; }

.btn-ghost .t { font-size: 15.5px; font-weight: 650; display: flex; align-items: center; gap: 8px; }
.btn-ghost .t svg { width: 15px; height: 15px; }
.btn-ghost .s { font-family: var(--mono); font-size: 10.5px; color: var(--dim); letter-spacing: .02em; }

.btn-quark {
    background: linear-gradient(172deg, #1b7ae8 0%, #0f5cc4 100%);
    min-width: 0;
}

/* 指标条 */

.facts {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    margin-top: 34px;
    background: var(--line);
    border: 1px solid var(--line);
    border-radius: 11px;
    overflow: hidden;
}

.fact { background: #fff; padding: 13px 15px 14px; }

.fact .k {
    font-size: 11px;
    letter-spacing: .07em;
    text-transform: uppercase;
    color: var(--dim);
    font-weight: 600;
}

.fact .v {
    font-size: 15px;
    font-weight: 700;
    color: var(--ink);
    letter-spacing: -.2px;
    line-height: 1.4;
    margin-top: 2px;
}

.fact .v small {
    display: block;
    font-family: var(--mono);
    font-size: 10.5px;
    font-weight: 500;
    color: var(--dim);
    letter-spacing: 0;
    margin-top: 1px;
}

/* ------------------------------------------------ 启动器窗口 */

.launcher {
    border-radius: 13px;
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: var(--sh-l);
    overflow: hidden;
}

.lch-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 9px 13px;
    background: linear-gradient(180deg, #f6faff 0%, #eaf3fd 100%);
    border-bottom: 1px solid var(--line);
}

.lch-dots { display: flex; gap: 5px; }
.lch-dots i { width: 8px; height: 8px; border-radius: 50%; background: #c7d9ec; display: block; }
.lch-dots i:first-child { background: #ffb3ae; }
.lch-dots i:nth-child(2) { background: #ffd79a; }
.lch-dots i:nth-child(3) { background: #a9e2bd; }

.lch-title {
    font-family: var(--mono);
    font-size: 11px;
    color: var(--mut);
    margin-left: 4px;
    letter-spacing: .02em;
}

.lch-badge {
    margin-left: auto;
    font-family: var(--mono);
    font-size: 10px;
    color: var(--blue-d);
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 2px 8px;
    letter-spacing: .02em;
}

.lch-body { display: grid; grid-template-columns: 116px 1fr; min-height: 254px; }

.lch-rail {
    background: #f7fbff;
    border-right: 1px solid var(--line2);
    padding: 11px 0;
}

.lch-rail div {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 6px 12px;
    font-size: 11.5px;
    color: #55708c;
    border-left: 2.5px solid transparent;
    white-space: nowrap;
}

.lch-rail div i {
    width: 5px;
    height: 5px;
    border-radius: 1.5px;
    background: #b6cde6;
    flex: 0 0 auto;
}

.lch-rail div.on {
    background: #fff;
    color: var(--blue-d);
    font-weight: 700;
    border-left-color: var(--blue);
}

.lch-rail div.on i { background: var(--blue); }

.lch-main { padding: 13px 14px 15px; }

.lch-hd {
    display: flex;
    align-items: baseline;
    gap: 8px;
    margin-bottom: 10px;
}

.lch-hd b { font-size: 12.5px; color: var(--ink); font-weight: 700; }
.lch-hd span { font-family: var(--mono); font-size: 10px; color: var(--dim); margin-left: auto; }

.tiles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }

.tile {
    border: 1px solid var(--line2);
    border-radius: 8px;
    padding: 8px 9px 9px;
    background: #fdfeff;
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.tile u {
    text-decoration: none;
    width: 20px;
    height: 20px;
    border-radius: 5px;
    background: var(--blue-l);
    border: 1px solid #cfe2fa;
    display: grid;
    place-items: center;
    font-family: var(--mono);
    font-size: 9px;
    font-weight: 700;
    color: var(--blue-d);
    margin-bottom: 2px;
}

.tile b { font-size: 11.5px; color: var(--ink); font-weight: 700; letter-spacing: -.1px; }
.tile span { font-size: 10px; color: var(--dim); }

.tile.hot { border-color: #b9d8fb; background: #f4f9ff; }
.tile.hot u { background: var(--blue); border-color: var(--blue); color: #fff; }

.lch-foot {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 13px;
    border-top: 1px solid var(--line);
    background: #f7fbff;
    font-family: var(--mono);
    font-size: 10.5px;
    color: var(--mut);
    letter-spacing: .01em;
    flex-wrap: wrap;
}

.lch-foot .led {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--ok);
    box-shadow: 0 0 0 2.5px rgba(18, 160, 106, .15);
    flex: 0 0 auto;
}

.lch-foot .sep { color: #c3d5e8; }

/* ------------------------------------------------ 通用区块 */

.sec { padding: 58px 0; }
.sec-alt { background: var(--ice); border-top: 1px solid var(--line2); border-bottom: 1px solid var(--line2); }
.sec-ink { background: var(--ink); color: #d6e6f7; }
.sec-ink h2, .sec-ink h3 { color: #fff; }
.sec-ink .sub { color: #94b3d0; }
.sec-tight { padding: 40px 0; }

.head { max-width: 44em; margin-bottom: 30px; }

.eyebrow2 {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: .13em;
    text-transform: uppercase;
    color: var(--blue);
    font-weight: 700;
    margin-bottom: 9px;
}

h2 {
    margin: 0 0 10px;
    font-size: clamp(22px, 2.4vw, 29px);
    line-height: 1.3;
    letter-spacing: -.7px;
    font-weight: 780;
    color: var(--ink);
}

.sub { margin: 0; color: var(--mut); font-size: 15.5px; line-height: 1.72; }

h3 { margin: 0 0 8px; font-size: 16.5px; font-weight: 720; color: var(--ink); letter-spacing: -.2px; }

.grid { display: grid; gap: 16px; }
.g2 { grid-template-columns: repeat(2, 1fr); }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g4 { grid-template-columns: repeat(4, 1fr); }

.card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 11px;
    padding: 18px 19px 19px;
    box-shadow: 0 1px 2px rgba(10, 27, 51, .04);
}

.card p { margin: 0; font-size: 14.5px; color: #54697f; line-height: 1.7; }
.card p + p { margin-top: 8px; }

.card .num {
    font-family: var(--mono);
    font-size: 11px;
    font-weight: 700;
    color: var(--blue-d);
    background: var(--blue-l);
    border-radius: 5px;
    padding: 2px 7px;
    display: inline-block;
    margin-bottom: 9px;
    letter-spacing: .04em;
}

.card-a { display: block; color: inherit; transition: transform .15s ease, border-color .15s ease, box-shadow .15s ease; }
.card-a:hover { text-decoration: none; transform: translateY(-2px); border-color: #b9d4f5; box-shadow: var(--sh); }
.card-a .go { display: block; margin-top: 10px; font-size: 13px; color: var(--blue); font-weight: 650; }

/* 列表 */

.list-check { list-style: none; margin: 0; padding: 0; }
.list-check li { position: relative; padding-left: 24px; margin: 7px 0; font-size: 14.8px; color: #4d637a; }
.list-check li::before {
    content: "";
    position: absolute;
    left: 2px;
    top: 9px;
    width: 9px;
    height: 5px;
    border-left: 2.2px solid var(--ok);
    border-bottom: 2.2px solid var(--ok);
    transform: rotate(-45deg);
}

.list-x { list-style: none; margin: 0; padding: 0; }
.list-x li { position: relative; padding-left: 24px; margin: 7px 0; font-size: 14.8px; color: #4d637a; }
.list-x li::before {
    content: "✕";
    position: absolute;
    left: 3px;
    top: 0;
    color: #c2600a;
    font-size: 12px;
    font-weight: 700;
}

/* 表格 */

.tbl { width: 100%; border-collapse: collapse; font-size: 14.2px; background: #fff; }
.tbl th {
    text-align: left;
    font-size: 12px;
    letter-spacing: .04em;
    text-transform: uppercase;
    color: var(--mut);
    font-weight: 700;
    padding: 10px 13px;
    background: #f5faff;
    border-bottom: 1px solid var(--line);
    white-space: nowrap;
}
.tbl td { padding: 11px 13px; border-bottom: 1px solid var(--line2); color: #4d637a; vertical-align: top; }
.tbl tr:last-child td { border-bottom: 0; }
.tbl b { color: var(--ink); font-weight: 650; }
.tbl .m { font-family: var(--mono); font-size: 12.8px; color: var(--ink2); word-break: break-all; }
.tbl-wrap { border: 1px solid var(--line); border-radius: 11px; overflow-x: auto; background: #fff; }

/* 步骤 */

.steps { counter-reset: st; margin: 0; padding: 0; list-style: none; }
.steps > li {
    counter-increment: st;
    position: relative;
    padding: 0 0 20px 44px;
    border-left: 2px solid var(--line);
    margin-left: 15px;
}
.steps > li:last-child { border-left-color: transparent; padding-bottom: 0; }
.steps > li::before {
    content: counter(st);
    position: absolute;
    left: -16px;
    top: -2px;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: #fff;
    border: 2px solid var(--blue);
    color: var(--blue-d);
    font-family: var(--mono);
    font-size: 12.5px;
    font-weight: 700;
    display: grid;
    place-items: center;
}
.steps h3 { margin-bottom: 4px; }
.steps p { margin: 0; font-size: 14.8px; color: #54697f; }

/* 正文 */

.prose { max-width: 46em; }
.prose h2 { margin-top: 34px; }
.prose h3 { margin-top: 26px; }
.prose p { margin: 0 0 15px; font-size: 15.3px; color: #4a5f77; }
.prose ul, .prose ol { margin: 0 0 16px; padding-left: 22px; }
.prose li { margin: 6px 0; font-size: 15.3px; color: #4a5f77; }
.prose b { color: var(--ink); }
.prose code {
    font-size: 13px;
    background: var(--blue-l);
    border: 1px solid #d5e6fa;
    border-radius: 4px;
    padding: 1px 5px;
    color: var(--blue-d);
}

pre {
    margin: 0 0 16px;
    padding: 14px 16px;
    background: #08182b;
    color: #cfe3f8;
    border-radius: 9px;
    font-size: 12.8px;
    line-height: 1.7;
    overflow-x: auto;
}

pre b { color: #7fd3ff; font-weight: 600; }

.note {
    display: flex;
    gap: 11px;
    padding: 13px 16px;
    background: var(--blue-l);
    border: 1px solid #cfe2fa;
    border-left: 3px solid var(--blue);
    border-radius: 0 9px 9px 0;
    font-size: 14.5px;
    color: #2f4a68;
    margin: 0 0 18px;
}

.note b { color: var(--ink); }

.warn {
    display: flex;
    gap: 11px;
    padding: 13px 16px;
    background: var(--warnbg);
    border: 1px solid #f5dfbc;
    border-left: 3px solid var(--warn);
    border-radius: 0 9px 9px 0;
    font-size: 14.5px;
    color: #6b4413;
    margin: 0 0 18px;
}

.warn b { color: #4d2f06; }

/* FAQ */

.qa { border: 1px solid var(--line); border-radius: 10px; background: #fff; margin-bottom: 9px; overflow: hidden; }
.qa summary {
    cursor: pointer;
    padding: 13px 17px;
    font-size: 15.2px;
    font-weight: 650;
    color: var(--ink);
    list-style: none;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}
.qa summary::-webkit-details-marker { display: none; }
.qa summary::before {
    content: "+";
    font-family: var(--mono);
    font-size: 14px;
    color: var(--blue);
    font-weight: 700;
    flex: 0 0 auto;
    line-height: 1.5;
}
.qa[open] summary::before { content: "−"; }
.qa[open] summary { border-bottom: 1px solid var(--line2); background: #fbfdff; }
.qa .a { padding: 13px 17px 15px; font-size: 14.6px; color: #4a5f77; }
.qa .a p { margin: 0 0 9px; }
.qa .a p:last-child { margin-bottom: 0; }
.qa .a ul { margin: 0 0 9px; padding-left: 20px; }
.qa .a li { margin: 5px 0; }

/* 面包屑 */

.crumb {
    font-size: 12.5px;
    color: var(--dim);
    padding: 18px 0 0;
    font-family: var(--mono);
}
.crumb a { color: var(--mut); }
.crumb span { color: #b6c7d9; margin: 0 6px; }

/* 页头 */

.pghead { padding: 18px 0 34px; border-bottom: 1px solid var(--line2); background: linear-gradient(180deg, #f8fbff 0%, #fff 100%); }
.pghead h1 { font-size: clamp(28px, 3.3vw, 38px); margin-bottom: 10px; letter-spacing: -.9px; }
.pghead .lead { margin-bottom: 0; font-size: 15.8px; }

/* 网盘面板 */

.panel-quark {
    border: 1px solid var(--line);
    border-radius: 13px;
    background: linear-gradient(168deg, #f4f9ff 0%, #eaf3fd 100%);
    padding: 24px 26px 26px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 20px;
}

.panel-quark .txt { flex: 1 1 250px; }
.panel-quark .txt h2 { font-size: 19px; margin-bottom: 4px; }
.panel-quark .txt p { margin: 0; font-size: 13.6px; color: var(--mut); }

.btn-q {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 15px 34px 17px;
    border-radius: 11px;
    background: linear-gradient(172deg, #2a7bf0 0%, #0f5cc4 100%);
    color: #fff;
    min-width: 340px;
    text-align: center;
    box-shadow: 0 12px 28px rgba(13, 79, 174, .3), inset 0 1px 0 rgba(255, 255, 255, .22);
}

.btn-q:hover { text-decoration: none; transform: translateY(-1px); box-shadow: 0 16px 34px rgba(13, 79, 174, .36); }

.btn-q .t { display: flex; align-items: center; gap: 9px; font-size: 20px; font-weight: 750; letter-spacing: -.2px; }
.btn-q .t svg { width: 19px; height: 19px; }
.btn-q small { font-family: var(--mono); font-size: 11px; opacity: .86; letter-spacing: .02em; }

/* 次按钮行 */

.btnline { display: flex; flex-wrap: wrap; gap: 10px; }
.btn-s {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 17px;
    border-radius: 9px;
    border: 1.5px solid var(--line);
    background: #fff;
    font-size: 14.2px;
    font-weight: 600;
    color: var(--ink);
}
.btn-s:hover { text-decoration: none; border-color: #b9d4f5; background: #fbfdff; }
.btn-s svg { width: 14px; height: 14px; }

/* 页脚 */

.foot {
    background: var(--ink);
    color: #9db8d4;
    padding: 44px 0 24px;
    font-size: 13.6px;
    margin-top: 0;
}

.foot-grid {
    display: grid;
    grid-template-columns: 1.7fr 1fr 1fr 1fr;
    gap: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid rgba(255, 255, 255, .1);
}

.foot .brand { color: #fff; font-size: 15px; margin-bottom: 10px; }
.foot .brand .mark { box-shadow: none; }
.foot .about { margin: 0; line-height: 1.72; color: #8aa8c8; font-size: 13px; max-width: 30em; }
.foot h4 { margin: 0 0 10px; font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: #fff; font-weight: 700; }
.foot-grid > div > a { display: block; color: #9db8d4; padding: 3px 0; font-size: 13px; }
.foot-grid > div > a:hover { color: #fff; text-decoration: none; }

.foot-bottom {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px;
    padding-top: 18px;
    font-size: 12.5px;
    color: #7491b0;
}

.foot-bottom a { color: #9db8d4; }
.foot-bottom a:hover { color: #fff; }

/* 分页/相关 */

.rel { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 6px; }
.rel a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 13px;
    border-radius: 999px;
    background: #fff;
    border: 1px solid var(--line);
    font-size: 13.4px;
    color: var(--ink2);
}
.rel a:hover { text-decoration: none; border-color: #b9d4f5; background: #fbfdff; }

/* 404 */

.nf { text-align: center; padding: 90px 0 100px; }
.nf .code { font-family: var(--mono); font-size: 76px; font-weight: 700; color: var(--blue-l); letter-spacing: -3px; line-height: 1; }
.nf h1 { font-size: 27px; margin: 12px 0 10px; }
.nf p { color: var(--mut); margin: 0 0 22px; }

/* ------------------------------------------------ 响应式 */

@media (max-width: 1000px) {
    .hero-in { grid-template-columns: 1fr; gap: 34px; padding: 44px 0 52px; }
    .launcher { max-width: 560px; }
    .foot-grid { grid-template-columns: 1fr 1fr; gap: 26px; }
    .g4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 820px) {
    .nav { display: none; }
    .menu-btn {
        display: inline-flex;
        align-items: center;
        gap: 7px;
        margin-left: auto;
        padding: 7px 13px;
        border: 1px solid var(--line);
        border-radius: 8px;
        font-size: 13.5px;
        font-weight: 650;
        color: var(--ink);
        background: #fff;
        cursor: pointer;
    }
    .menu-btn svg { width: 14px; height: 14px; }
    .menu:checked ~ .nav {
        display: flex;
        position: absolute;
        left: 0;
        right: 0;
        top: 62px;
        flex-direction: column;
        align-items: stretch;
        gap: 2px;
        padding: 10px 18px 16px;
        background: #fff;
        border-bottom: 1px solid var(--line);
        box-shadow: 0 14px 26px rgba(10, 27, 51, .1);
    }
    .menu:checked ~ .nav a { padding: 9px 11px; }
    .menu:checked ~ .nav .nav-dl { margin: 6px 0 0; text-align: center; }
    .g3, .g2 { grid-template-columns: 1fr; }
    .g4 { grid-template-columns: repeat(2, 1fr); }
    .btn-dl, .btn-ghost { min-width: 0; flex: 1 1 100%; }
    .panel-quark { padding: 20px; }
    .btn-q { min-width: 0; width: 100%; }
    .lch-body { grid-template-columns: 96px 1fr; }
    .tiles { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
    .wrap { padding: 0 16px; }
    .facts { grid-template-columns: repeat(2, 1fr); }
    .foot-grid { grid-template-columns: 1fr; gap: 22px; }
    .sec { padding: 40px 0; }
    h1 { letter-spacing: -.8px; }
    .tbl th, .tbl td { padding: 9px 10px; font-size: 13.4px; }
    .lch-rail { display: none; }
    .lch-body { grid-template-columns: 1fr; }
    .nf { padding: 60px 0 70px; }
    .nf .code { font-size: 58px; }
}