:root {
    --bg-dark: #0f1023;
    --bg-mid: #1a1a2e;
    --bg-card: #1f2137;
    --bg-card-hover: #282b45;
    --border: #2c2f4a;
    --primary: #00d48a;
    --primary-2: #29f499;
    --accent: #4ecdc4;
    --accent-2: #44a08d;
    --danger: #ff6b6b;
    --text: #e8eaf2;
    --text-dim: #9aa0b5;
    --text-faint: #6b7090;
    --radius: 16px;
    --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

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

html { scroll-behavior: smooth; }

body {
    font-family: "Segoe UI", "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    background: var(--bg-dark);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--primary); }

/* ===== 背景光晕 ===== */
.bg-glow {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background:
        radial-gradient(600px 400px at 15% 0%, rgba(0, 212, 138, 0.12), transparent 60%),
        radial-gradient(700px 500px at 85% 15%, rgba(78, 205, 196, 0.10), transparent 60%),
        radial-gradient(800px 600px at 50% 110%, rgba(255, 107, 107, 0.06), transparent 60%);
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* ===== 导航栏 ===== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    background: rgba(15, 16, 35, 0.82);
    border-bottom: 1px solid var(--border);
}
.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
}
.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
}
.brand-logo {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    box-shadow: 0 0 18px rgba(0, 212, 138, 0.4);
}
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { color: var(--text-dim); font-size: 0.95rem; }
.nav-links a:hover { color: var(--primary); }
.nav-links a.active { color: var(--primary); }
.nav-links a.nav-promo {
    color: var(--primary);
    font-weight: 700;
    padding: 6px 14px;
    border-radius: 999px;
    border: 1px solid rgba(0, 212, 138, 0.5);
    background: rgba(0, 212, 138, 0.08);
    transition: transform 0.22s ease, box-shadow 0.22s ease, background 0.22s ease;
}
.nav-links a.nav-promo:hover {
    background: rgba(0, 212, 138, 0.16);
    box-shadow: 0 0 18px rgba(0, 212, 138, 0.45);
    transform: translateY(-1px);
}
.nav-links a.nav-promo.active {
    color: var(--primary);
    background: rgba(0, 212, 138, 0.16);
    box-shadow: 0 0 14px rgba(0, 212, 138, 0.4);
}
.nav-cta {
    background: linear-gradient(135deg, var(--primary), var(--primary-2));
    color: #06231a !important;
    font-weight: 700;
    padding: 8px 20px;
    border-radius: 999px;
    box-shadow: 0 0 16px rgba(0, 212, 138, 0.35);
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 0 24px rgba(0, 212, 138, 0.55); }

/* ===== Hero ===== */
.hero { padding: 90px 0 70px; text-align: center; position: relative; }
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: rgba(0, 212, 138, 0.08);
    color: var(--primary);
    font-size: 0.85rem;
    margin-bottom: 24px;
}
.hero h1 {
    font-size: clamp(2.4rem, 6vw, 4.2rem);
    font-weight: 800;
    letter-spacing: 2px;
    margin-bottom: 12px;
}
.hero h1 .grad {
    background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary-2));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}
.hero p.subtitle {
    font-size: clamp(1rem, 2.4vw, 1.25rem);
    color: var(--text-dim);
    max-width: 640px;
    margin: 0 auto 34px;
}
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 56px; }
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 34px;
    border-radius: 999px;
    font-size: 1.05rem;
    font-weight: 700;
    transition: all 0.25s ease;
    cursor: pointer;
    border: none;
}
.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-2));
    color: #06231a;
    box-shadow: 0 0 24px rgba(0, 212, 138, 0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 36px rgba(0, 212, 138, 0.6); }
.btn-ghost {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

.hero-visual {
    max-width: 704px;
    margin: 0 auto;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    position: relative;
}
.hero-visual img { width: 100%; display: block; }
.hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-top: 44px;
    flex-wrap: wrap;
}
.stat { text-align: center; }
.stat .num {
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.stat .label { color: var(--text-faint); font-size: 0.9rem; margin-top: 2px; }

/* ===== Section 通用 ===== */
section { padding: 80px 0; }
.section-head { text-align: center; margin-bottom: 56px; }
.section-head h2 {
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 800;
    margin-bottom: 12px;
}
.section-head p { color: var(--text-dim); max-width: 560px; margin: 0 auto; }
.section-tag {
    display: inline-block;
    font-size: 0.8rem;
    color: var(--primary);
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 10px;
}

/* ===== 特性卡片 ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}
.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 30px 26px;
    transition: all 0.3s ease;
}
.feature-card:hover {
    transform: translateY(-6px);
    border-color: rgba(0, 212, 138, 0.5);
    background: var(--bg-card-hover);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}
.feature-icon {
    width: 54px;
    height: 54px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    margin-bottom: 18px;
}
.feature-card h3 { font-size: 1.2rem; margin-bottom: 10px; }
.feature-card p { color: var(--text-dim); font-size: 0.95rem; }

.icon-green { background: rgba(0, 212, 138, 0.14); }
.icon-teal { background: rgba(78, 205, 196, 0.14); }
.icon-red { background: rgba(255, 107, 107, 0.14); }
.icon-purple { background: rgba(154, 113, 255, 0.14); }
.icon-blue { background: rgba(66, 154, 255, 0.14); }
.icon-orange { background: rgba(255, 165, 66, 0.14); }

/* ===== 工作流程 ===== */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; }
.step {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 30px 26px;
    position: relative;
    text-align: center;
}
.step-num {
    width: 44px;
    height: 44px;
    margin: 0 auto 16px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #06231a;
    font-weight: 800;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 18px rgba(0, 212, 138, 0.35);
}
.step h3 { margin-bottom: 8px; }
.step p { color: var(--text-dim); font-size: 0.95rem; }
.step-arrow {
    position: absolute;
    top: 50%;
    right: -20px;
    color: var(--primary);
    font-size: 1.4rem;
    transform: translateY(-50%);
}

/* ===== 支持平台 ===== */
.platforms { text-align: center; }
.platform-chips { display: flex; justify-content: center; flex-wrap: wrap; gap: 14px; }
.chip {
    padding: 12px 26px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-dim);
    font-size: 0.95rem;
    transition: all 0.25s ease;
}
.chip:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); }
.chip b { color: var(--text); }

/* ===== 网络联机 CTA ===== */
.tunnel-cta {
    background: linear-gradient(135deg, rgba(0, 212, 138, 0.12), rgba(78, 205, 196, 0.10));
    border: 1px solid rgba(0, 212, 138, 0.35);
    border-radius: 24px;
    padding: 48px;
    text-align: center;
}
.tunnel-cta h2 { font-size: clamp(1.6rem, 3.5vw, 2.3rem); margin-bottom: 14px; }
.tunnel-cta p { color: var(--text-dim); max-width: 620px; margin: 0 auto 28px; }
.tunnel-tags { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.tunnel-tags span {
    padding: 6px 16px;
    border-radius: 999px;
    background: rgba(0, 212, 138, 0.1);
    color: var(--primary);
    font-size: 0.85rem;
}

/* ===== FAQ ===== */
.faq { max-width: 760px; margin: 0 auto; }
.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 14px;
    margin-bottom: 14px;
    padding: 22px 26px;
    cursor: pointer;
    transition: border-color 0.25s ease;
}
.faq-item:hover { border-color: rgba(0, 212, 138, 0.4); }
.faq-q {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
}
.faq-q .icon { color: var(--primary); transition: transform 0.3s ease; font-size: 1.2rem; }
.faq-item.open .faq-q .icon { transform: rotate(45deg); }
.faq-a { color: var(--text-dim); font-size: 0.95rem; max-height: 0; overflow: hidden; transition: max-height 0.35s ease, margin-top 0.35s ease; }
.faq-item.open .faq-a { max-height: 200px; margin-top: 12px; }

/* ===== 页脚 ===== */
.footer {
    border-top: 1px solid var(--border);
    padding: 40px 0 30px;
    text-align: center;
    color: var(--text-faint);
    font-size: 0.9rem;
}
.footer .brand { justify-content: center; margin-bottom: 12px; font-size: 1.1rem; }
.footer-links { display: flex; justify-content: center; gap: 24px; margin: 14px 0; }
.footer-links a { color: var(--text-faint); font-size: 0.9rem; }
.footer-links a:hover { color: var(--primary); }

/* ===== 下载按钮 ===== */
.download-btns {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}
.btn-baidu {
    background: linear-gradient(135deg, #4e7ef2, #2a5de0);
    color: #fff;
    box-shadow: 0 0 20px rgba(42, 93, 224, 0.35);
}
.btn-baidu:hover { transform: translateY(-2px); box-shadow: 0 0 30px rgba(42, 93, 224, 0.55); }
.btn-lanzou {
    background: linear-gradient(135deg, #3db8a8, #2a937f);
    color: #fff;
    box-shadow: 0 0 20px rgba(42, 147, 127, 0.35);
}
.btn-lanzou:hover { transform: translateY(-2px); box-shadow: 0 0 30px rgba(42, 147, 127, 0.55); }

/* ===== 通用页面内容（帮助/宝盒等子页） ===== */
.page { padding: 80px 0; }
.page-head { text-align: center; margin-bottom: 48px; }
.page-head h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    margin-bottom: 12px;
}
.page-head p { color: var(--text-dim); max-width: 600px; margin: 0 auto; }
.prose { max-width: 760px; margin: 0 auto; color: var(--text-dim); line-height: 1.9; }
.prose h3 { color: var(--text); margin: 28px 0 10px; font-size: 1.2rem; }
.prose p { margin-bottom: 12px; }
.prose.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 30px 32px;
}

/* ===== 动画 ===== */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ===== 手机端适配 ===== */
@media (max-width: 900px) {
    .container { padding: 0 18px; }
    .features-grid { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
    .steps { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .navbar .container { height: 60px; }
    .brand { font-size: 1.1rem; }
    .brand-logo { width: 32px; height: 32px; font-size: 1rem; }
    .hero { padding: 52px 0 44px; }
    .hero h1 { font-size: 2.2rem; letter-spacing: 1px; }
    .hero p.subtitle { font-size: 1rem; margin-bottom: 26px; }
    .hero-btns { flex-direction: column; align-items: stretch; gap: 12px; margin-bottom: 40px; }
    .hero-btns .btn { justify-content: center; width: 100%; }
    .hero-visual { border-radius: 12px; }
    .hero-stats { gap: 28px; }
    .stat .num { font-size: 1.6rem; }
    .stat .label { font-size: 0.82rem; }
    section { padding: 52px 0; }
    .section-head { margin-bottom: 40px; }
    .section-head h2 { font-size: 1.7rem; }
    .feature-card { padding: 24px 20px; }
    .step-arrow { display: none; }
    .tunnel-cta { padding: 32px 22px; border-radius: 18px; }
    .tunnel-tags { gap: 8px; }
    .tunnel-tags span { padding: 5px 12px; font-size: 0.8rem; }
    .faq-item { padding: 18px 20px; }
    .faq-q { font-size: 0.95rem; gap: 12px; }
    .footer-links { gap: 16px; flex-wrap: wrap; }
}

@media (max-width: 480px) {
    .container { padding: 0 14px; }
    .hero h1 { font-size: 1.9rem; }
    .hero-badge { font-size: 0.75rem; padding: 5px 12px; }
    .hero-stats { gap: 18px; }
    .stat { width: 45%; }
    .btn { padding: 12px 24px; font-size: 1rem; }
    .features-grid { grid-template-columns: 1fr; gap: 16px; }
    .step { padding: 24px 18px; }
    .chip { padding: 10px 18px; font-size: 0.88rem; }
    .footer { padding: 32px 0 24px; }
}

/* ===== Markdown 文档正文 ===== */
.markdown-body {
    max-width: 820px;
    margin: 0 auto;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px 44px;
    color: var(--text-dim);
    line-height: 1.9;
    font-size: 1rem;
}
.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
    color: var(--text);
    font-weight: 800;
    margin: 32px 0 14px;
    line-height: 1.4;
}
.markdown-body h1 {
    font-size: clamp(1.7rem, 4vw, 2.2rem);
    margin-top: 0;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border);
}
.markdown-body h2 {
    font-size: 1.4rem;
    padding-left: 12px;
    border-left: 4px solid var(--primary);
}
.markdown-body h3 { font-size: 1.15rem; }
.markdown-body p { margin: 14px 0; }
.markdown-body a { color: var(--accent); }
.markdown-body a:hover { color: var(--primary); text-decoration: underline; }
.markdown-body ul,
.markdown-body ol { margin: 14px 0 14px 26px; }
.markdown-body li { margin: 6px 0; }
.markdown-body li::marker { color: var(--primary); }
.markdown-body strong { color: var(--text); }
.markdown-body blockquote {
    margin: 18px 0;
    padding: 12px 18px;
    background: rgba(0, 212, 138, 0.08);
    border-left: 4px solid var(--primary);
    border-radius: 6px;
    color: var(--text-dim);
}
.markdown-body blockquote p { margin: 0; }
.markdown-body code {
    background: rgba(255, 255, 255, 0.07);
    color: var(--primary-2);
    padding: 2px 7px;
    border-radius: 6px;
    font-size: 0.88em;
    font-family: "Consolas", "Courier New", monospace;
}
.markdown-body pre {
    background: #0b0d1c;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 18px 20px;
    overflow-x: auto;
    margin: 18px 0;
}
.markdown-body pre code {
    background: none;
    color: var(--text);
    padding: 0;
    font-size: 0.9rem;
    line-height: 1.7;
}
.markdown-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 18px 0;
    font-size: 0.95rem;
}
.markdown-body th,
.markdown-body td {
    border: 1px solid var(--border);
    padding: 10px 14px;
    text-align: left;
}
.markdown-body th { background: rgba(0, 212, 138, 0.08); color: var(--text); font-weight: 700; }
.markdown-body hr { border: none; border-top: 1px solid var(--border); margin: 28px 0; }

/* ===== 帮助中心 ===== */
.help-page .page { padding-top: 40px; }

/* 页头 */
.help-hero {
    text-align: center;
    margin: 24px 0 64px;
    position: relative;
}
.help-hero::before {
    content: "";
    position: absolute;
    left: 50%;
    top: -30px;
    transform: translateX(-50%);
    width: 420px;
    height: 220px;
    background: radial-gradient(closest-side, rgba(0, 212, 138, 0.16), transparent);
    pointer-events: none;
    z-index: -1;
}
.help-hero h1 {
    font-size: clamp(2.2rem, 5vw, 3.2rem);
    font-weight: 900;
    letter-spacing: 1px;
    background: linear-gradient(120deg, var(--text) 30%, var(--primary-2));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin: 10px 0 16px;
}
.help-summary { color: var(--text-dim); font-size: 1.1rem; max-width: 560px; margin: 0 auto 26px; }
.help-meta { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }
.meta-chip {
    padding: 8px 18px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-dim);
    font-size: 0.9rem;
    transition: all 0.25s ease;
}
.meta-chip:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); }

/* 板块容器 */
.dir-section { max-width: 900px; margin: 0 auto 72px; }
.dir-head {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}
.dir-index {
    font-size: 2rem;
    font-weight: 900;
    color: transparent;
    line-height: 1;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    opacity: 0.9;
}
.dir-title {
    font-size: 1.7rem;
    font-weight: 900;
    color: var(--text);
    margin: 0;
}
.dir-lead { color: var(--text-faint); font-size: 0.95rem; margin-top: 4px; }

.dir-subtitle {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--text);
    margin: 34px 0 20px;
}
.sub-line { flex: 0 0 48px; height: 2px; border-radius: 2px; background: linear-gradient(90deg, var(--primary), transparent); }

/* 卡片网格 */
.dir-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
    gap: 18px;
}
.doc-card {
    position: relative;
    display: flex;
    align-items: flex-start;
    gap: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 22px;
    color: var(--text);
    overflow: hidden;
    transition: transform 0.28s ease, border-color 0.28s ease, background 0.28s ease, box-shadow 0.28s ease;
}
.doc-card::before {
    content: "";
    position: absolute;
    inset: 0 0 0 0;
    background: linear-gradient(135deg, rgba(0, 212, 138, 0.16), rgba(78, 205, 196, 0.06));
    opacity: 0;
    transition: opacity 0.28s ease;
    pointer-events: none;
}
.doc-card::after {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--primary), var(--accent));
    opacity: 0;
    transition: opacity 0.28s ease;
}
.doc-card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 212, 138, 0.55);
    box-shadow: 0 20px 44px rgba(0, 0, 0, 0.4);
}
.doc-card:hover::before { opacity: 1; }
.doc-card:hover::after { opacity: 1; }
.doc-icon {
    width: 50px;
    height: 50px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    border-radius: 13px;
    background: rgba(0, 212, 138, 0.12);
    border: 1px solid rgba(0, 212, 138, 0.25);
    transition: transform 0.3s ease, background 0.3s ease;
}
.doc-card:hover .doc-icon { transform: scale(1.08) rotate(-4deg); background: rgba(0, 212, 138, 0.2); }
.doc-body { position: relative; z-index: 1; min-width: 0; flex: 1; }
.doc-name { font-weight: 700; font-size: 1.02rem; margin-bottom: 6px; }
.doc-desc { color: var(--text-faint); font-size: 0.85rem; line-height: 1.55; margin-bottom: 12px; }
.doc-go { font-size: 0.85rem; font-weight: 700; color: var(--primary); }
.doc-go i { display: inline-block; transition: transform 0.25s ease; font-style: normal; }
.doc-card:hover .doc-go i { transform: translateX(4px); }
.doc-empty { color: var(--text-faint); padding: 12px 0; }

/* ===== 帮助中心 - 文档页（doc） ===== */
.doc-page .container { max-width: 900px; }
.doc-breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--text-faint);
    margin-bottom: 28px;
}
.doc-breadcrumb a { color: var(--text-dim); }
.doc-breadcrumb a:hover { color: var(--primary); }
.crumb-sep { opacity: 0.5; }
.crumb-current { color: var(--primary); }
.doc-hero { margin-bottom: 32px; }
.doc-hero h1 {
    font-size: clamp(1.9rem, 4.5vw, 2.7rem);
    font-weight: 900;
    margin: 8px 0 18px;
    color: var(--text);
}
.doc-back {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-dim);
    padding: 8px 16px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--bg-card);
    transition: all 0.25s ease;
}
.doc-back:hover { color: var(--primary); border-color: var(--primary); transform: translateX(-3px); }
.doc-footer { margin-top: 36px; text-align: center; }

/* ===== 游戏架设 - 小工具入口按钮 ===== */
#setup { position: relative; }
.tools-btn-wrap {
    display: flex;
    justify-content: center;
    margin-bottom: 34px;
}
.tools-btn {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    max-width: 100%;
    padding: 20px 34px;
    border-radius: 999px;
    background: linear-gradient(135deg, rgba(0, 212, 138, 0.2), rgba(78, 205, 196, 0.12));
    border: 1px solid rgba(0, 212, 138, 0.5);
    color: var(--text);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06), 0 4px 18px rgba(0, 212, 138, 0.15);
    transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease, background 0.28s ease;
}
.tools-btn:hover {
    transform: translateY(-3px);
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(0, 212, 138, 0.3), rgba(78, 205, 196, 0.2));
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08), 0 18px 44px rgba(0, 212, 138, 0.3);
    color: var(--text);
}
.tools-icon {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    border-radius: 50%;
    background: rgba(0, 212, 138, 0.18);
    border: 1px solid rgba(0, 212, 138, 0.35);
    transition: transform 0.3s ease;
}
.tools-btn:hover .tools-icon { transform: scale(1.1) rotate(-6deg); }
.tools-text { font-size: 1.2rem; font-weight: 800; }
.tools-go { font-size: 0.92rem; font-weight: 700; color: var(--primary); }
.tools-go i { display: inline-block; font-style: normal; transition: transform 0.25s ease; }
.tools-btn:hover .tools-go i { transform: translateX(5px); }

/* ===== 页脚备案（beian） ===== */
.footer-copyright { margin-top: 18px; }
.beian {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
    font-weight: 500;
    color: var(--text-faint);
    font-size: 0.85rem;
    line-height: 1.6;
}
.beian img {
    width: 16px;
    height: 16px;
    vertical-align: middle;
    border-radius: 3px;
    background: #fff;
    padding: 1px;
    opacity: 0.85;
}
.beian a {
    color: var(--text-faint);
    text-decoration: none;
    transition: color 0.25s ease;
}
.beian a:hover { color: var(--primary); }